WO2021082907A1

WO2021082907A1 - Wireless charging system, charging cable, electronic device, and wireless charging method therefor

Info

Publication number: WO2021082907A1
Application number: PCT/CN2020/120608
Authority: WO
Inventors: 孙霓; 赵春江; 张成旭; 朱建伟
Original assignee: 华为技术有限公司
Priority date: 2019-10-29
Filing date: 2020-10-13
Publication date: 2021-05-06
Also published as: CN110829552A

Abstract

Disclosed in embodiments of the present application are a wireless charging system, a charging cable, an electronic device, and a wireless charging method therefor. The wireless charging system comprises the electronic device and the charging cable, the charging cable can perform normal charging on the electronic device in a first charging mode, and can perform quick charging on the electronic device in a second charging mode. When the electronic device is wirelessly charged by means of the charging cable, a user can hold and use the electronic device, thereby improving the usage experience of the user in a wireless charging scenario.

Description

Wireless charging system, charging cable, electronic equipment and wireless charging method thereof

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 29, 2019, the application number is 201911038156.8, and the application name is "Wireless Charging System, Charging Cable, Electronic Equipment and Wireless Charging Method", all of which The content is incorporated in this application by reference.

Technical field

The embodiments of the present application relate to the field of wireless charging technology, and in particular, to a wireless charging system, an electronic device, a charging cable, and a wireless charging method.

Background technique

Currently, chargers can charge electronic devices (such as mobile phones, etc.) through wireless charging. The receiving coil of the electronic device for realizing wireless charging adopts a flat spiral wire structure, and the transmitting coil of the charger for realizing wireless charging also adopts a flat spiral wire structure. Since the outer diameter of the receiving coil is relatively large and needs to occupy a relatively large area, it is installed on a side with a relatively large plane of the electronic device, such as the back cover of the electronic device. The charger also adopts a flat structure with a larger area due to the larger outer diameter of the transmitting coil. When the electronic device is charged, it needs to be placed above the charger and the back cover of the electronic device contacts the charger so that the receiving coil is facing the transmitting coil. As a result, the user cannot hold and use the electronic device when the electronic device is wirelessly charged, resulting in a poor user experience of wireless charging.

Summary of the invention

The purpose of this application is to provide a wireless charging system, an electronic device, a charging cable, and a wireless charging method. When the electronic device in the wireless charging system is wirelessly charged through the charging cable, the user can hold and use the electronic device, thereby improving the user experience in the wireless charging scenario.

In the first aspect, an embodiment of the present application provides a wireless charging system. The wireless charging system includes electronic equipment and charging cables. The charging cable is used to charge the electronic device.

The electronic device includes a back cover, a frame, a receiving magnet, a receiving coil, and a battery. The frame is circumferentially connected to the periphery of the back cover. The receiving magnet is located inside the frame. The receiving magnet bar includes a first receiving coupling surface and a second receiving coupling surface intersecting the first receiving coupling surface. The area of the second receiving coupling surface is larger than that of the first receiving coupling surface. The first receiving coupling surface faces the frame. The second receiving coupling surface faces the rear cover. The receiving coil is wound around the middle of the receiving magnet bar. The battery is located inside the frame and is electrically connected to the receiving coil.

The charging cable includes a charging head housing, a transmitting magnet and a transmitting coil. The charging head shell includes a shell end surface and a shell side surface connected to the periphery of the shell end surface. The transmitting magnet is located inside the shell of the charging head. The transmitting magnet bar includes a first transmitting coupling surface and a second transmitting coupling surface intersecting the first transmitting coupling surface. The area of the second transmitting coupling surface is larger than that of the first transmitting coupling surface. The first transmitting coupling surface faces the end surface of the housing. The second emission coupling surface faces the side surface of the housing. The transmitting coil is wound around the middle of the transmitting magnetic rod.

When the wireless charging system is in the first charging mode, the end surface of the housing is in contact with the frame, the first transmitting coupling surface is facing the first receiving coupling surface, the transmitting coil and the receiving coil are coupled and the coupling coefficient is the first coupling coefficient.

When the wireless charging system is in the second charging mode, the side of the housing is in contact with the back cover, the second transmitting coupling surface is facing the second receiving coupling surface, the transmitting coil and the receiving coil are coupled and the coupling coefficient is the second coupling coefficient, and the second coupling coefficient is greater than The first coupling coefficient.

In this embodiment, the electronic device is charged through the charging cable. Due to the small size and light weight of the charging cable, the charging cable can be moved and deformed. Therefore, the charging cable can move with the electronic device so that the user can connect to the electronic device. Hold and use the electronic device during wireless charging to realize charging while playing, thereby improving the user experience of the electronic device and the wireless charging system in the wireless charging scenario. At the same time, the charging cable of the wireless charging system is used as a charging device for electronic equipment. Compared with the traditional wireless charging base (with a flat transmitting coil), the charging cable is smaller in size and easy to carry.

The magnetic field lines of the transmitting magnet bar of the charging cable can be coupled to the first receiving coupling surface of the receiving magnet bar through the first transmitting coupling surface, so as to charge the electronic device in the first charging mode, and the magnetic field line of the transmitting magnet bar can also be The second transmitting coupling surface is coupled to the second receiving coupling surface of the receiving magnet bar to charge the electronic device in the second charging mode. Therefore, the wireless charging system has two charging modes, and the charging cable is in the two charging modes The ways of connecting electronic devices are different, so the charging methods of the wireless charging system are more diversified, which is conducive to the coverage of multiple scenarios of wireless charging, and makes the wireless charging experience of electronic devices better.

Since the second coupling coefficient is greater than the first coupling coefficient, the charging speed of the electronic device in the second charging mode is faster than the charging speed in the first charging mode. The first charging mode corresponds to normal charging, and the second charging mode corresponds to Fast charging to achieve multi-scene mode coverage of wireless charging. Users can flexibly choose the charging speed of electronic devices according to their specific needs, so that the wireless charging experience of electronic devices is better. For example, compared to fast charging, ordinary charging has low charging power, which can extend the cycle life of the battery of electronic devices, thereby reducing the problem of battery capacity degradation. Therefore, in the case of loose time (such as sleeping at night), users can choose Ordinary charging, when the time is relatively short (for example, it is urgent to go out), the user can choose to charge quickly.

In addition, since the charging end is overlapped on the electronic device to charge the electronic device, there is no need to open a recessed plug port on the electronic device and set exposed connection terminals in the plug port, so the appearance of the electronic device is more consistent. Good, better sealing performance, and can also avoid problems such as slow charging and inability to charge electronic devices due to aging or deformation of the connection terminals.

In addition, in order to meet the needs of lighter and thinner and large-screen display, the size of the width direction and the length direction of the electronic device are larger, while the size of the thickness direction is smaller. In this embodiment, the arrangement direction of the first receiving end portion, the middle portion and the second receiving end portion of the receiving magnet bar is parallel to the width direction of the electronic device, and the area of the first receiving coupling surface facing the frame is smaller than that of the second receiving coupling surface facing the rear cover. The area of the receiving coupling surface, therefore, the size of the receiving magnet in the thickness direction of the electronic device is smaller than the size in the length direction of the electronic device, so that the receiving magnet makes full use of the internal space of the electronic device, and can be installed with a larger area Coupling surface in order to obtain a faster charging speed, but also to avoid increasing the thickness of the electronic device.

The charging end is roughly flat, the shape of the emitting magnet bar is similar to the shape of the charging end, and when it is installed inside the charging head housing of the charging end, its smaller area (that is, the first emitting coupling surface) ) Is directly opposite to the shell end surface of the charging head shell, and its larger area (that is, the second emission coupling surface) is directly opposite to the shell side of the charging head shell, so as to make full use of the internal space of the charging head shell, so that it can be installed There is a coupling surface with a larger area to obtain a faster charging speed, and it can also avoid a significant increase in the volume of the charging end.

Among them, the frame and the back cover may be an integral structure, or may be assembled (such as snap connection, bonding, etc.) to form an integral structure.

In an optional embodiment, the receiving magnet bar includes a first receiving end portion, a middle portion, and a second receiving end portion connected in sequence. Exemplarily, the receiving magnetic rod is roughly in the shape of a rectangular column. The middle portion of the receiving magnet bar is concave relative to the first receiving end portion and the second receiving end portion, so as to form a recessed space at the periphery of the middle portion of the receiving magnet bar. The receiving coil may be located in the recessed space, so that the volume of the assembled structure of the receiving magnet bar and the receiving coil is small. Wherein, the receiving coil is wound around the extension direction of the middle part, and the extension direction of the middle part is the direction in which the end connected to the first receiving end extends to the end connected to the second receiving end.

In an optional embodiment, the first receiving end includes an end surface and a first side surface, a second side surface, a third side surface, and a fourth side surface that are sequentially connected to the periphery of the end surface in a circumferential manner. The first side surface and the third side surface of the first receiving end are arranged opposite to each other, and the second side surface and the fourth side surface are arranged opposite to each other. The area of the second side surface of the first receiving end is larger than the area of the first side surface. The second receiving end includes an end surface and a first side surface, a second side surface, a third side surface, and a fourth side surface that are sequentially connected to the periphery of the end surface in a circumferential manner. The first side surface and the third side surface of the second receiving end are arranged opposite to each other, and the second side surface and the fourth side surface are arranged opposite to each other. The area of the second side surface of the first receiving end is larger than the area of the first side surface.

The first side surface of the second receiving end portion faces the same direction as the first side surface of the first receiving end portion, and the second side surface of the second receiving end portion faces the same direction as the second side surface of the first receiving end portion. Exemplarily, the first side surface of the second receiving end portion is coplanar with the first side surface of the first receiving end portion, and the second side surface of the second receiving end portion is coplanar with the second side surface of the first receiving end portion. The first receiving coupling surface includes a first side surface of the first receiving end portion and a first side surface of the second receiving end portion. The second receiving coupling surface includes a second side surface of the first receiving end portion and a second side surface of the second receiving end portion.

In an optional embodiment, the transmitting magnet bar includes a first transmitting end portion, a middle portion, and a second transmitting end portion connected in sequence. Exemplarily, the transmitting magnetic rod is roughly in the shape of a rectangular column. The middle part of the emitting magnet rod is recessed relative to the first emitting end part and the second emitting end part, so as to form a recessed space at the periphery of the middle part of the emitting magnet rod. The transmitting coil can be located in the recessed space, so that the volume of the assembled structure of the transmitting magnetic rod and the transmitting coil is small. Wherein, the transmitting coil is wound around the extending direction of the middle part, and the extending direction of the middle part is the direction in which the end connecting the first emitting end part extends to the end connecting to the second emitting end part.

In an optional embodiment, the first emitting end includes an end surface and a first side surface, a second side surface, a third side surface, and a fourth side surface that are sequentially connected to the periphery of the end surface in a circumferential manner. The first side surface and the third side surface of the first emitting end are arranged opposite to each other, and the second side surface and the fourth side surface are arranged opposite to each other. The area of the second side surface and the fourth side surface of the first emitting end portion is larger than the area of the first side surface and the third side surface. The second emitting end portion includes an end surface and a first side surface, a second side surface, a third side surface, and a fourth side surface that are sequentially connected to the periphery of the end surface in a circumferential manner. The first side surface and the third side surface of the second emitting end are arranged opposite to each other, and the second side surface and the fourth side surface are arranged opposite to each other. The area of the second side surface and the fourth side surface of the second emitting end portion is larger than the area of the first side surface and the third side surface.

The first side surface of the second emitting end portion faces the same direction as the first side surface of the first emitting end portion, and the second side surface of the second emitting end portion faces the same direction as the second side surface of the first emitting end portion. Exemplarily, the first side surface of the second emitting end portion is coplanar with the first side surface of the first emitting end portion, and the second side surface of the second emitting end portion is coplanar with the second side surface of the first emitting end portion. The first emission coupling surface includes a first side surface of the first emission end portion and a first side surface of the second emission end portion. The second emitting coupling surface includes a second side surface of the first emitting end portion and a second side surface of the second emitting end portion. The area of the second emission coupling surface is larger than the area of the first emission coupling surface. Wherein, the number of the second emission coupling surface may be two, and the other second emission coupling surface may include the fourth side surface of the first emitting end portion and the fourth side surface of the second emitting end portion.

When the wireless charging system is in the second charging mode, both sides of the charging head housing can contact the back cover to realize charging. Specifically, the wireless charging system has no restrictions on the polarity (that is, the winding direction) of the receiving coil and the transmitting coil. The charging head housing does not need to distinguish between the front and the back. After either of the two housing sides touches the back cover, the transmitting coil can be used. It is coupled with the receiving coil, so charging can be realized after the charging cable is connected in any direction, and the user experience is good.

In an optional embodiment, the transmitting magnet rod is made of soft magnetic material to obtain a larger saturation magnetic induction intensity. The soft magnetic material can be, but is not limited to, ferrite, iron-based nanocrystalline alloy, iron-based amorphous alloy, permalloy and other materials. The transmitting coil adopts copper wire, and the wire type can be Litz wire to reduce skin effect and AC loss. The material of the receiving magnet is the same as that of the receiving magnet. The material of the receiving coil is the same as that of the transmitting coil.

In an optional embodiment, the electronic device further includes an insulating layer covering the outer surface of the receiving magnet bar. The insulating layer can be made of insulating foam, insulating paint or insulating film. It is understandable that since the resistivity of the receiving magnet is very low and it is a good conductor, if the insulating protective layer on the surface of the receiving coil is damaged and the receiving coil directly contacts the receiving magnet, it is easy to short-circuit through the surface of the receiving magnet.

In this embodiment, the arrangement of the insulating layer can prevent the receiving coil from being short-circuited through the receiving magnetic rod, thereby increasing the reliability of the charging assembly. Wherein, the outer surface of the transmitting magnetic rod can also be covered with an insulating layer to prevent the transmitting coil from being short-circuited via the transmitting magnetic rod.

In an optional embodiment, the electronic device further includes a shielding cover, the shielding cover is sleeved on the outside of the receiving coil, and the shielding cover is used for shielding the electric field generated by the receiving coil. At this time, the shielding cover can form a Faraday cage on the outside of the receiving coil, thereby shielding the electric field generated by the receiving coil, so as to reduce the external electromagnetic interference of the receiving coil. The shield can be made of electrical shielding materials such as copper foil. Among them, the material of the shielding cover adopts the material with low magnetic permeability, so that the magnetic field lines are more transmitted in the receiving magnet bar. Wherein, the charging end may also include a shielding cover, which is sleeved on the outside of the transmitting coil for shielding the electric field generated by the transmitting coil.

In an optional embodiment, the electronic device further includes a first magnetic attraction component, and the first magnetic attraction component is located inside the frame and arranged around the receiving magnet bar. The charging cable further includes a second magnetic attraction component, which is located inside the charging head housing and arranged on the periphery of the emitting magnet rod. When the wireless charging system is in the first charging mode and the second charging mode, the first magnetic attraction component and the second magnetic attraction component attract each other.

In the embodiment of the present application, when the wireless charging system is in the first charging mode and the second charging mode, the first magnetic attraction component of the electronic device and the second magnetic attraction component of the charging end of the charging cable attract each other to make the charging After the end is close to the electronic device, it can be automatically aligned to a predetermined area, so that the transmitter and receiving magnet can be accurately aligned, and the charging end can be stably attached to the electronic device, so that the charging process of the wireless charging system is highly reliable.

In an optional embodiment, the first magnetic attraction assembly includes two first magnetic attraction blocks and two second magnetic attraction blocks, and the two first magnetic attraction blocks are respectively arranged on both sides of the receiving magnetic rod. The two second magnetic blocks are respectively arranged on both sides of the receiving magnetic bar, and the first magnetic block is located between the frame and the second magnetic block.

The second magnetic attraction assembly includes two third magnetic attraction blocks and two fourth magnetic attraction blocks. The two third magnetic attraction blocks are respectively arranged on both sides of the emitting magnetic rod, and the two fourth magnetic attraction blocks are arranged respectively On both sides of the emitting magnetic rod, the third magnetic block is located between the end surface of the housing and the fourth magnetic block.

When the wireless charging system is in the first charging mode, the two first magnetic blocks and the two third magnetic blocks are attracted to each other in a one-to-one correspondence. When the wireless charging system is in the second charging mode, the two first magnetic blocks are in a one-to-one correspondence with the two fourth magnetic blocks, and the two second magnetic blocks are in a one-to-one correspondence with the two third magnetic blocks. The blocks attract each other.

In this embodiment, since the two first magnetic blocks and the two third magnetic blocks can attract each other, the charging end is attracted to the charging area of the frame of the electronic device, and the transmitting magnetic rod and the receiving magnetic rod are paired with each other. The position is accurate, and the shell end surface of the charging end is stable and positioned accurately to contact the charging area of the frame, thereby ensuring the coupling effect of the transmitting coil and the receiving coil, and making the charging process of the wireless charging system in the first charging mode reliable.

Since the two first magnetic blocks and the two fourth magnetic blocks can attract each other, the two second magnetic blocks and the two third magnetic blocks can attract each other, so that the charging end is attracted to the back of the electronic device. At the charging area of the cover, the transmitter and receiver magnets are aligned accurately, and the shell end surface of the charging end is stable and positioned accurately to contact the charging area of the back cover, thereby ensuring the coupling effect of the transmitter coil and the receiving coil, enabling wireless charging The charging process when the system is in the first charging mode is reliable.

In an optional embodiment, the charging assembly further includes a fixing member. The fixing part is used to fix the receiving magnet bar on the inner side of the frame. Among them, the fixing part is made of non-ferromagnetic materials to prevent the wireless charging electromagnetic field from passing through the fixing part, thereby reducing the influence on the efficiency of wireless charging. The non-ferromagnetic material can be, but is not limited to, austenitic stainless steel.

In other embodiments, the magnetic receiving bar can also be fixed on the inner side of the frame by dispensing glue. For example, the magnetic receiving rod is bonded to the frame, the middle plate or the back cover through the bonding member. Alternatively, the intermediate structural member that fixes and receives the magnet bar is bonded to the frame, the middle plate or the back cover through an adhesive member, so as to fix and receive the magnet bar.

In an alternative embodiment, the frame includes a first frame portion and a second frame portion intersecting the first frame portion. The number of receiving magnet bars is at least two, wherein the first receiving coupling surface of one receiving magnet bar faces the first frame portion, and the first receiving coupling surface of the other receiving magnet bar faces the second frame portion. The number of receiving coils is the same as the number of receiving magnetic rods, at least two receiving coils are wound around the at least two receiving magnetic rods in a one-to-one correspondence, and all the receiving coils are electrically connected to the battery.

In this embodiment, the electronic device has multiple charging positions corresponding to multiple receiving magnetic rods, and the user can flexibly select the charging position according to the requirements of vertical or horizontal holding, so that it can be realized in a variety of scenarios. While charging and playing, the wireless charging experience of electronic devices is better.

In an optional embodiment, the electronic device further includes a receiving matching circuit, a wireless charging receiving control chip, a primary converter, a secondary converter, and a charging control chip, a receiving coil, a receiving matching circuit, a wireless charging receiving control chip, The first-level converter, the second-level converter, the charging control chip and the battery are connected in sequence. When the wireless charging system is in the first charging mode, the first-level converter is in bypass mode, and the second-level converter achieves step-down; when the wireless charging system is in the second charging mode, the first-level converter achieves first-level step-down and second-level conversion The device achieves two-stage pressure reduction.

In this embodiment, because the charging speed in the first charging mode is slow, the voltage converter reduces the DC voltage output by the wireless charging receiving control chip to within a predetermined range through one step-down, while the charging speed in the second charging mode is slower. Fast, so the voltage converter reduces the DC voltage output by the wireless charging receiving control chip to a predetermined range through continuous secondary step-down, so the voltage converter has a wide step-down range, and electronic devices can be applied to multiple charging modes.

In an optional embodiment, the charging cable includes a charging end portion, a cable portion, and an adapter end portion that are sequentially connected. The charging end includes the aforementioned charging head housing, the aforementioned transmitter magnet and the aforementioned transmitter coil. The cable part can be moved and deformed. The charging end is used to detachably connect to the electronic device so as to be coupled with the electronic device to transmit energy and signals. The cable part is used to transmit energy and signals between the charging end and the adapter end. The end of the adapter is used to detachably plug in a power adapter or power supply.

In an optional embodiment, the end of the adapter includes a booster circuit, and the booster circuit is electrically connected to the transmitting coil via the cable portion. Since the adapter end of the charging cable is equipped with a boost circuit, if the adapter end is connected to a power adapter that does not support voltage regulation (for example, the old power adapter only supports 5V output and does not support boost), the boost The circuit can realize the voltage regulation function, so that the transmission power of the charging cable meets the requirements of multiple charging modes, so the compatibility of the charging cable is better.

In addition, because the boost circuit is located at the adapter end of the charging cable, the other main hardware circuits of the charging cable are located at the charging end, that is, the boost circuit and other hardware circuits are located at both ends of the charging cable, which are physically realized Isolation, so that the booster circuit that easily generates heat can be separated from other heat sources to prevent the local temperature of the charging cable from being too high.

In an optional embodiment, the wireless charging system may further include a power adapter. The power adapter is used to convert high-voltage AC power into low-voltage DC power. The adapter end of the charging cable is used to detachably plug the power adapter. At this time, the charging cable can convert low-voltage direct current into low-voltage alternating current for coupling to the electronic device. After the power adapter is plugged into the power socket, the power in the power socket can be transmitted to the electronic device through the power adapter and the charging cable to charge the electronic device.

In another optional embodiment, the end of the adapter can also be used to detachably plug in a power source such as a power bank, and the power source charges the electronic device through a charging cable. Exemplarily, some electronic devices carrying batteries (such as laptop computers) can also be used as power sources to supply power to the electronic devices to be charged.

In the second aspect, an embodiment of the present application also provides an electronic device. The electronic device includes a frame, a back cover, a receiving magnet, a receiving coil, and a battery. The frame is circumferentially connected to the periphery of the back cover. The receiving magnet is located inside the frame. The receiving magnet includes a first receiving coupling surface and a first receiving coupling surface. Intersecting second receiving coupling surface, the area of the second receiving coupling surface is larger than the area of the first receiving coupling surface, the first receiving coupling surface is arranged facing the frame, the second receiving coupling surface is arranged facing the back cover, and the receiving coil is wound around the receiving magnet In the middle of the battery, the battery is located inside the frame and is electrically connected to the receiving coil.

The receiving coil is used for coupling with the transmitting coil of the charging cable via the first receiving coupling surface in the first charging mode, and the coupling coefficient is the first coupling coefficient. The receiving coil is also used for coupling with the transmitting coil of the charging cable via the second receiving coupling surface in the second charging mode, and the coupling coefficient is a second coupling coefficient, and the second coupling coefficient is greater than the first coupling coefficient.

In this embodiment, the electronic device is charged through the charging cable. Due to the small size and light weight of the charging cable, the charging cable can be moved and deformed. Therefore, the charging cable can move with the electronic device so that the user can perform the charging on the electronic device. Holding and using the electronic device during wireless charging realizes charging while playing, thereby improving the user experience of the electronic device in the wireless charging scenario.

The magnetic field lines of the transmitting coil of the charging cable can be coupled to the first receiving coupling surface of the receiving magnet bar to charge the electronic device in the first charging mode, and the magnetic field lines of the transmitting coil can also be coupled to the second receiving surface of the receiving magnet bar. The coupling surface is used to charge the electronic device in the second charging mode. Therefore, the electronic device has two charging modes. In the two charging modes, the charging cable connects to the electronic device in different ways, so the charging method of the electronic device is more diverse , Which is conducive to the coverage of multiple scenarios of wireless charging, making the wireless charging experience of electronic devices better.

In addition, in order to meet the needs of lighter and thinner and large-screen display, electronic devices have larger dimensions in the width direction and length direction, and smaller dimensions in the thickness direction. In this embodiment, the arrangement direction of the first receiving end portion, the middle portion and the second receiving end portion of the receiving magnet bar is parallel to the width direction of the electronic device, and the area of the first receiving coupling surface facing the frame is smaller than that of the second receiving coupling surface facing the rear cover. The area of the receiving coupling surface, therefore, the size of the receiving magnet in the thickness direction of the electronic device is smaller than the size in the length direction of the electronic device, so that the receiving magnet makes full use of the internal space of the electronic device, and can be installed with a larger area Coupling surface in order to obtain a faster charging speed, but also to avoid increasing the thickness of the electronic device.

In an optional embodiment, the electronic device further includes a first magnetic attraction component, the first magnetic attraction component is located inside the frame and arranged around the receiving magnet bar, and the first magnetic attraction component is used in the first charging mode and the second charging mode. In the second charging mode, the second magnetic attraction component of the charging cable attracts each other.

In the embodiment of the present application, in the first charging mode and the second charging mode, the first magnetic attraction component of the electronic device and the second magnetic attraction component of the charging end of the charging cable attract each other, so that the The charging head housing can be automatically aligned to a predetermined area after being close to the electronic device, so that the transmitter magnetic rod and the receiving magnetic rod can be accurately aligned, and the charging head housing can be stably adsorbed on the electronic device, so that the reliability of the charging process is high.

In an optional embodiment, the electronic device further includes a receiving matching circuit, a wireless charging receiving control chip, a primary converter, a secondary converter, and a charging control chip, a receiving coil, a receiving matching circuit, a wireless charging receiving control chip, The first-level converter, the second-level converter, the charging control chip and the battery are connected in sequence. When the electronic device is in the first charging mode, the first-stage converter is in bypass mode, and the second-stage converter realizes the step-down; when the electronic device is in the second charging mode, the first-stage converter realizes the first-stage step-down and the second-stage converter realizes Secondary pressure reduction.

In the third aspect, an embodiment of the present application also provides a charging cable. The charging cable includes a charging head housing, a transmitting magnet bar and a transmitting coil. The charging head housing includes an end surface of the housing and a side surface of the housing connected to the periphery of the end surface of the housing. The transmitting magnet is located inside the charging head housing, and the transmitting magnet includes a first transmitting coupling surface. And the second emission coupling surface intersecting with the first emission coupling surface, the area of the second emission coupling surface is larger than the area of the first emission coupling surface, the first emission coupling surface faces the end surface of the housing, and the second emission coupling surface faces the side surface of the housing. The coil is wound around the middle of the transmitting magnetic rod.

The transmitting coil is used for coupling with the receiving coil of the electronic device via the first transmitting coupling surface in the first charging mode, and the coupling coefficient is the first coupling coefficient. The transmitting coil is also used for coupling with the receiving coil of the electronic device via the second transmitting coupling surface and the coupling coefficient is the second coupling coefficient in the second charging mode, and the second coupling coefficient is greater than the first coupling coefficient.

In this embodiment, the electronic device is charged through the charging cable. Due to the small size and light weight of the charging cable, the charging cable can be moved and deformed. Therefore, the charging cable can move with the electronic device so that the user can connect to the electronic device. Hold and use the electronic device during wireless charging to realize charging while playing, thereby improving the user experience of the electronic device in the wireless charging scenario, and making the charging cable more widely used. At the same time, the charging cable of the wireless charging system is used as a charging device for electronic equipment. Compared with the traditional wireless charging base (with a flat transmitting coil), the charging cable is smaller in size and easy to carry.

The magnetic field lines of the transmitting magnet bar of the charging cable can be coupled to the receiving coil of the electronic device through the first transmitting coupling surface to charge the electronic device in the first charging mode, and the magnetic field lines of the transmitting magnetic bar can also be coupled through the second transmitting coupling. It is coupled to the receiving coil of the electronic device to charge the electronic device in the second charging mode. Therefore, the charging cable has two charging modes. In the two charging modes, the charging cable connects to the electronic device in different ways, so the charging The cable charging methods for electronic devices are more diversified, which is conducive to the coverage of multiple scenarios of wireless charging and improves the wireless charging experience.

The charging head shell is roughly flat, the shape of the emitting magnet bar is similar to the shape of the charging head shell, and when it is installed inside the charging head shell, its smaller surface (that is, the first emitting coupling surface) and the charging head The shell end surface of the shell is directly opposite, and the larger area (ie, the second transmitting coupling surface) is directly opposite to the side of the shell of the charging head shell, so as to make full use of the internal space of the charging head shell, so that a larger area can be installed In order to obtain a faster charging speed, it can also avoid a significant increase in the volume of the charging head housing.

In an optional embodiment, the charging cable further includes a second magnetic attraction component, the second magnetic attraction component is located inside the charging head housing and arranged on the periphery of the transmitter magnet; the second magnetic attraction component is used to In the first charging mode and the second charging mode, the first magnetic attraction component of the electronic device attracts each other.

In an optional embodiment, the charging cable includes a charging end, a cable, and an adapter end that are connected in sequence, the charging end includes a charging head housing, a transmitter magnet, and a transmitter coil, and the adapter end includes a booster circuit. , The boost circuit is electrically connected to the transmitting coil via the cable part.

In this embodiment, since the adapter end of the charging cable is provided with a boost circuit, if the adapter end is connected to a power adapter that does not support the voltage regulation function (for example, the old power adapter only supports 5V output and does not support boost The boost circuit can realize the voltage regulation function when the voltage is high, so that the transmission power of the charging cable meets the requirements of multiple charging modes, so the compatibility of the charging cable is better.

In addition, because the boost circuit is located at the adapter end of the charging cable, the other main hardware circuits of the charging cable are located at the charging end, that is, the boost circuit and other hardware circuits are located at both ends of the charging cable, which are physically realized Isolation, so that the booster circuit that is easy to generate heat can be separated from other heat sources to prevent the local temperature of the charging cable from being too high.

In a fourth aspect, an embodiment of the present application also provides a wireless charging method for electronic equipment. The wireless charging method can be applied to the aforementioned electronic devices.

Wireless charging methods include:

The electronic device receives the digital communication signal emitted by the charging cable and responds to the confirmation signal;

The electronic device judges whether it is in the first charging mode or the second charging mode;

If the electronic device is in the first charging mode, the electronic device transmits the first adjustment signal to the charging cable, so that the charging cable adjusts the electrical parameters of the transmitting coil according to the first adjustment signal and then charges the electronic device normally;

If the electronic device is in the second charging mode, the electronic device transmits the second adjustment signal to the charging cable, so that the charging cable adjusts the electrical parameters of the transmitting coil according to the second adjustment signal to quickly charge the electronic device.

In this embodiment, the charging cable can dynamically adjust the electrical parameters of the transmitting coil according to the adjustment signal transmitted by the electronic device, so that in the corresponding charging mode, the receiving power of the receiving coil is adjusted to adjust the wireless charging power to the required power. Thus, the energy is stably transmitted to the electronic device, so that the reliability of the charging process of the wireless charging system is high.

Among them, the wireless charging receiving control chip of the electronic device can modulate the first adjustment signal or the second adjustment signal according to the input adjustment signal transmitted by the power management module, and adopts the amplitude shift keying modulation method to adjust the first adjustment signal or the second adjustment signal. The signal is coupled to the transmitting coil at the charging end through the receiving coil to realize transmission. The wireless charging transmission control chip at the charging end can demodulate the first adjustment signal or the second adjustment signal to obtain adjustment information, and then adjust the electrical parameters of the transmitting coil according to the adjustment information, thereby adjusting the receiving power of the receiving coil and the wireless charging system Wireless charging power to meet the charging power demand of the current charging mode.

In an embodiment, the wireless charging power adjustment can be achieved through a fixed-frequency and voltage-regulating solution. That is, the frequency of the alternating current in the transmitting coil is fixed, and the voltage of the alternating current in the transmitting coil is adjusted. Specifically, the first adjustment signal and the second adjustment signal are voltage adjustment signals, and the adjustment information obtained after the wireless charging transmission control chip demodulates the first adjustment signal or the second adjustment signal is the voltage adjustment information. Among them, the adjustment signal can carry a signal that increases or decreases to a certain required voltage.

In one example, the power adapter has a voltage regulation function. After the wireless charging transmission control chip forms the voltage regulation information, the voltage regulation information is transmitted to the interface controller of the power adapter through the cable part and the adapter end, and the interface controller feeds back the voltage regulation information to the single-ended flyback power controller. The terminal flyback power controller controls the transformer according to the voltage regulation information, so that the voltage of the low-voltage direct current output by the power adapter is adjusted to the required voltage, and the low-voltage direct current with the required voltage is transmitted to the wireless charging transmitter of the charging terminal through the adapter end and the cable section The control chip, the wireless charging transmission control chip converts the low-voltage direct current with the required voltage into alternating current, so that the voltage of the alternating current on the transmitting coil of the charging cable changes, thereby realizing the adjustment of the wireless charging power.

In another example, the power adapter does not have a voltage regulation function, and the adapter end of the charging cable has a boost circuit. After the wireless charging transmission control chip forms the voltage regulation information, it transmits the voltage regulation information to the boost circuit at the end of the adapter through the cable part. The boost circuit adjusts the low-voltage direct current output by the power adapter to the required voltage according to the voltage regulation information, and then through The cable part is transmitted to the wireless charging transmission control chip, and the wireless charging transmission control chip converts the low-voltage direct current with the required voltage into alternating current, so that the voltage of the alternating current on the transmitting coil of the charging cable changes, thereby realizing the adjustment of the wireless charging power.

In another embodiment, wireless charging power adjustment can be achieved through a constant voltage and frequency modulation scheme. That is, the voltage of the alternating current in the transmitting coil is fixed, and the frequency of the alternating current in the transmitting coil is adjusted. Specifically, the first adjustment signal and the second adjustment signal are frequency modulation signals, and the adjustment information obtained after the wireless charging transmission control chip demodulates the first adjustment signal or the second adjustment signal is the frequency modulation information. Among them, the FM signal can carry a signal that increases or decreases to a certain required frequency. After the wireless charging transmission control chip obtains the frequency modulation information, it can directly adjust the frequency of the alternating current output by the frequency modulation information to adjust the frequency of the alternating current on the transmitting coil, thereby realizing the adjustment of the wireless charging power.

In another embodiment, the wireless charging power adjustment can be achieved by adjusting the duty cycle. Specifically, the first adjustment signal and the second adjustment signal are duty cycle adjustment signals, and the adjustment information obtained after the wireless charging transmission control chip demodulates the first adjustment signal or the second adjustment signal is the duty cycle adjustment information. Among them, the duty cycle adjustment signal can carry a signal that increases or decreases to a certain required duty cycle information. After the wireless charging transmission control chip obtains the duty cycle adjustment information, it can directly adjust the duty cycle of its output AC power according to the duty cycle adjustment information to adjust the duty cycle of the AC power on the transmitting coil, thereby realizing the adjustment of the wireless charging power .

In an optional embodiment, the method for the electronic device to determine whether it is in the first charging mode or the second charging mode includes:

The electronic device transmits the charging mode detection command to the charging cable;

_{The electronic device receives the voltage V 1} of the transmitting coil transmitted by the charging cable;

The electronic device measures the voltage V _{2 of the} receiving coil;

The electronic device calculates the coupling coefficient k, where,

L ₁ is the inductance value of the transmitting coil, and L ₂ is the inductance value of the receiving coil;

If the coupling coefficient k is within the first threshold range, the electronic device is in the first charging mode;

If the coupling coefficient k is within the second threshold range, the electronic device is in the second charging mode.

In this embodiment, the electronic device can confirm the coupling coefficient between the transmitting coil of the charging cable and the receiving coil of the electronic device through the measured voltage of the transmitting coil and the measuring voltage of the receiving coil; and then through the coupling coefficient and the coupling coefficient of the two charging modes By comparing the ranges, it is judged that the wireless charging system is in the first charging mode, in the second charging mode, or in an abnormal state, and the judgment method is accurate and easy to implement.

The electronic device measures the measured voltage V’ of the receiving coil;

The electronic device calculates the coupling coefficient k, where,

V is the preset voltage V of the transmitting coil of the charging cable, L ₁ is the inductance value of the transmitting coil, and L ₂ is the inductance value of the receiving coil;

In this embodiment, the electronic device can confirm the coupling coefficient between the transmitting coil of the charging cable and the receiving coil of the electronic device through the preset voltage of the transmitting coil and the measured voltage of the receiving coil; and then coupling the two charging modes through the coupling coefficient The comparison of the coefficient ranges determines that the wireless charging system is in the first charging mode, in the second charging mode, or in an abnormal state, and the judgment method is accurate and easy to implement. Compared with the foregoing embodiments, this embodiment reduces the signal interaction process between a charging cable and the electronic device.

The electronic device receives the inductance value of the transmitting coil transmitted by the charging cable;

If the inductance value is within the first inductance range, the electronic device is in the first charging mode;

If the inductance value is within the second inductance range, the electronic device is in the second charging mode.

In this embodiment, the charging cable detects the inductance value of the transmitting coil and transmits the inductance value to the electronic device. The power management module of the electronic device determines whether the inductance value is within the first inductance range or the second inductance range, thereby determining whether the inductance value is within the first inductance range or the second inductance range. The charging mode of the charging system is judged accurately and easily.

In an optional embodiment, the wireless charging method further includes:

If the electronic device is in the first charging mode, the electronic device bypasses the primary converter, turns on the secondary converter, and calls the first charging curve;

If the electronic device is in the second charging mode, the electronic device turns on the primary converter and the secondary converter, and calls the second charging curve.

In this embodiment, when the power management module of the electronic device determines that the wireless charging system is in the first charging mode, since the wireless charging power of the charging cable to the electronic device in the first charging mode is small, the wireless charging reception control of the electronic device is The DC voltage output by the chip is low, so the voltage converter adopts a one-stage step-down method (that is, bypassing the first-level converter and turning on the second-level converter) to convert the DC voltage output by the wireless charging receiving control chip to charging control Within the receiving range of the chip. When the power management module of the electronic device determines that the wireless charging system is in the second charging mode, since the wireless charging power of the charging cable to the electronic device in the second charging mode is relatively large, the DC voltage output by the wireless charging receiving control chip of the electronic device is relatively high. Therefore, the voltage converter adopts a two-stage step-down method (that is, the first-stage converter and the second-stage converter are turned on) to convert the DC voltage output by the wireless charging receiving control chip into the receiving range of the charging control chip.

When the power management module of the electronic device determines that the wireless charging system is in the first charging mode, the power management module obtains the current capacity of the battery through the charging control chip. The power management module also calls the first charging curve and determines that the current capacity of the battery is in the first charging mode. The charging stage of the charging curve, and the input regulation signal and the output regulation signal are formed according to the current demand of the charging stage. The power management module transmits the input adjustment signal to the wireless charging receiving control chip, so as to transmit the adjustment requirement to the charging cable through the interaction between the transmitting coil and the receiving coil. The power management module transmits the output adjustment signal to the charging control chip, and the charging control chip controls the output voltage and current according to the output adjustment signal.

When the power management module of the electronic device determines that the wireless charging system is in the second charging mode, the power management module obtains the current capacity of the battery through the charging control chip. The power management module also calls the second charging curve and determines that the current capacity of the battery is in the second charging mode. The charging stage of the charging curve, and the input regulation signal and the output regulation signal are formed according to the current demand of the charging stage. The power management module transmits the input adjustment signal to the wireless charging receiving control chip, so as to transmit the adjustment requirement to the charging cable through the interaction between the transmitting coil and the receiving coil. The power management module transmits the output adjustment signal to the charging control chip, and the charging control chip controls the output voltage and current according to the output adjustment signal.

In an optional embodiment, the wireless charging method further includes:

If the electronic device is in the first charging mode, the electronic device displays a normal charging icon;

If the electronic device is in the second charging mode, the electronic device displays a fast charging icon.

In this embodiment, the electronic device prompts the user which charging power state the electronic device is in by displaying different charging icons, so as to prevent confusion and confusion for the user (for example, when fast charging is required, entering the normal charging mode by mistake) , To further improve the user's wireless charging experience.

In addition, if the electronic device is in the first charging mode or the second charging mode, the electronic device displays the current power level. At this time, the user can clearly understand the current power level of the battery of the electronic device to facilitate making more reasonable arrangements.

In an optional embodiment, the wireless charging method further includes:

If the wireless charging system is not in the first charging mode or the second charging mode, the electronic device displays an abnormal charging icon. In other words, if the wireless charging system is in an abnormal charging state, the electronic device displays an abnormal charging icon. Exemplarily, if the alignment between the charging cable and the electronic device is not accurate, or there are foreign objects between the two, the wireless charging system is prone to abnormal charging status.

In this embodiment, the electronic device can promptly remind the user that the current charging state is abnormal, prompting the user to check whether the connection relationship between the charging cable and the electronic device is accurate and reliable, thereby ensuring the smooth progress of the wireless charging process.

In a fifth aspect, an embodiment of the present application also provides a chip, which is applied to an electronic device. The chip includes: one or more processors and one or more interfaces; the interface is used to receive code instructions and transmit the code instructions to the processor, and the processor is used to run the code instructions to make the electronic device execute any of the above-mentioned wireless Charging method.

In a sixth aspect, the embodiments of the present application also provide a chip, which is applied to an electronic device. The chip includes: one or more processors and one or more interfaces; the interface is used to receive code instructions and transmit the code instructions to the processor, and the processor is used to run the code instructions so that the electronic device executes the following methods:

Calculate the coupling coefficient k, where,

V ₁ is the voltage of the transmitting coil of the charging cable, V ₂ is the voltage of the receiving coil of the electronic device, L ₁ is the inductance value of the transmitting coil, and L ₂ is the inductance value of the receiving coil;

If the coupling coefficient k is within the first threshold range, it is confirmed that the electronic device is in the first charging mode;

If the coupling coefficient k is within the second threshold range, it is confirmed that the electronic device is in the second charging mode.

In an example, the voltage V _{1 of the} transmitting coil and the voltage of the receiving coil are voltages measured in real time _{by V 2.} In another example, the voltage V ₁ of the transmitting coil is a preset voltage, and the voltage of the receiving coil V ₂ is a voltage measured in real time.

In a seventh aspect, the embodiments of the present application also provide a chip, and the chip is applied to an electronic device. The chip includes: one or more processors and one or more interfaces; the interface is used to receive code instructions and transmit the code instructions to the processor, and the processor is used to run the code instructions so that the electronic device executes the following methods:

Receive the inductance value of the transmitting coil of the charging cable;

If the inductance value is within the first inductance range, confirm that the electronic device is in the first charging mode;

If the inductance value is within the second inductance range, it is confirmed that the electronic device is in the second charging mode.

In an eighth aspect, an embodiment of the present application provides a readable storage medium, including instructions, which, when the instructions run on an electronic device, cause the electronic device to execute any one of the above-mentioned wireless charging methods.

In a ninth aspect, the embodiments of the present application provide a computer program product, which when the computer program product runs on an electronic device, causes the electronic device to execute any one of the above-mentioned wireless charging methods applied to an electronic device.

Description of the drawings

FIG. 1 is a schematic structural diagram of a wireless charging system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an electronic device of the wireless charging system shown in FIG. 1;

3 is a schematic diagram of the structure of the charging assembly of the electronic device shown in FIG. 2;

Fig. 4 is an exploded schematic diagram of the charging assembly shown in Fig. 3;

FIG. 5 is an exploded schematic diagram of the charging end of the charging cable shown in FIG. 1;

Fig. 6 is a partial structural diagram of the charging end of the charging cable shown in Fig. 1;

FIG. 7 is a schematic structural diagram of the wireless charging system shown in FIG. 1 when it is in a first charging mode;

FIG. 8 is a schematic structural diagram of a part of the structure of the wireless charging system shown in FIG. 7;

Fig. 9 is a schematic diagram of the distribution of magnetic lines of force when the structure shown in Fig. 8 is in operation;

FIG. 10 is a schematic structural diagram of the wireless charging system shown in FIG. 1 when it is in a second charging mode;

FIG. 11 is a schematic structural diagram of a part of the structure of the wireless charging system shown in FIG. 10;

Fig. 12 is a schematic diagram of the distribution of magnetic lines of force when the structure shown in Fig. 11 is in operation;

FIG. 13 is a schematic structural diagram of a transmitting magnetic rod of the wireless charging system shown in FIG. 1 in a possible embodiment;

Fig. 14 is a schematic structural diagram of the wireless charging system shown in Fig. 1 in an embodiment;

15 is a schematic structural diagram of a part of the structure of the wireless charging system shown in FIG. 7;

FIG. 16 is a schematic structural diagram of a part of the structure of the wireless charging system shown in FIG. 10;

FIG. 17 is a schematic structural diagram of a part of the structure of the wireless charging system shown in FIG. 7 in another embodiment;

18 is a schematic structural diagram of a part of the structure of the wireless charging system shown in FIG. 10 in another embodiment;

FIG. 19 is a schematic diagram of the structure of the receiving magnet bar and the receiving coil shown in FIG. 3 in some embodiments;

20 is a schematic structural diagram of a part of the structure of the electronic device shown in FIG. 1 in another embodiment;

21 is a schematic structural diagram of the electronic device of the wireless charging system shown in FIG. 1 in another embodiment;

FIG. 22 is a schematic structural diagram of the electronic device shown in FIG. 21 from another angle;

FIG. 23 is a schematic structural diagram of the electronic device shown in FIG. 21 after being folded;

24 is an exploded schematic diagram of the adapter end of the charging cable of the wireless charging system shown in FIG. 1;

FIG. 25 is a schematic diagram of a charging process of a wireless charging system provided by an embodiment of the present application;

FIG. 26 is a schematic block diagram of the hardware circuit of the power adapter shown in FIG. 25;

Fig. 27 is a schematic block diagram of a hardware circuit of the charging cable shown in Fig. 25 in an embodiment;

Fig. 28 is a schematic block diagram of a hardware circuit of the charging cable shown in Fig. 25 in another embodiment;

29 is a schematic block diagram of the hardware circuit of the power management module and the charging component of the electronic device shown in FIG. 25;

FIG. 30 is a schematic diagram of a partial circuit of the charging assembly shown in FIG. 29;

FIG. 31 is a schematic diagram of a first charging curve provided by an embodiment of the present application;

FIG. 32 is a schematic diagram of a second charging curve provided by an embodiment of the present application;

FIG. 33 is a flowchart of a wireless charging method of a wireless charging system provided by an embodiment of the present application;

FIG. 34 is a method for an electronic device to determine a charging mode of a wireless charging system according to an embodiment of the present application;

FIG. 35 is another method for an electronic device to determine a charging mode of a wireless charging system according to an embodiment of the present application;

FIG. 36 is still another method for an electronic device to determine a charging mode of a wireless charging system according to an embodiment of the present application;

FIG. 37 is a schematic diagram of a method of detecting the resonance frequency of the transmitting coil;

FIG. 38 is a schematic diagram of an exemplary interface of the electronic device in the first charging mode;

FIG. 39 is a schematic diagram of an exemplary interface of the electronic device in the second charging mode;

FIG. 40 is a schematic diagram of an exemplary interface of an electronic device in an abnormal charging state.

Detailed ways

The following embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a wireless charging system 1000 according to an embodiment of the present application. The wireless charging system 1000 includes an electronic device 100 and a charging cable 200. The electronic device 100 may be a mobile phone, a tablet computer, a notebook computer, a camera, a wearable device, and the like. In the embodiment shown in FIG. 1, the electronic device 100 is a mobile phone as an example for description. The charging cable 200 is used to charge the electronic device 100. As shown in FIG. 1, the charging cable 200 includes a charging end 21, an adapter end 22, and a cable portion 23 connected between the charging end 21 and the adapter end 22. The charging end 21 is used to detachably connect to the electronic device 100 so as to be coupled with the electronic device 100 to transmit energy and signals. The cable part 23 is used to transmit energy and signals between the charging end 21 and the adapter end 22.

In this embodiment, the charging cable 200 charges the electronic device 100 through the charging end 21. The charging end 21 is small in size and light in weight. The cable part 23 of the charging cable 200 can move and deform, so the charging end 21 can move with the electronic device 100, so that the user can hold and use the electronic device 100 when the electronic device 100 is wirelessly charged, so as to realize charging and playing, thereby improving the performance of the electronic device 100 and the wireless charging system 1000 in the wireless charging scenario. User experience. At the same time, the charging cable 200 of the wireless charging system 1000 is used as a charging device for the electronic device 100. Compared with the traditional wireless charging base (with a flat transmitting coil), the charging cable 200 is smaller in size and easy to carry.

In addition, since the charging end 21 is overlapped on the electronic device 100 to charge the electronic device 100, there is no need to open a recessed plug port on the electronic device 100 and provide exposed connection terminals in the plug port, so the electronic device 100 The appearance consistency is better, the sealing performance is better, and it can also avoid problems such as slow charging and inability to charge the electronic device 100 due to the aging or deformation of the connection terminals.

It is understandable that the wireless charging in the embodiments of the present application means that the charging component (such as the charging cable 200) and the component to be charged (such as the electronic device 100) can be coupled through electromagnetic induction or magnetic resonance, etc. The energy transmission is realized, and the charging component can charge the charging component.

In some embodiments, as shown in FIG. 1, the wireless charging system 1000 may further include a power adapter 300. The power adapter 300 is used to convert high-voltage alternating current into low-voltage direct current. For example, the power adapter 300 can convert a high-voltage alternating current with a voltage of 220V and a frequency of 50 Hz into a low-voltage direct current of 5V to 12V. The adapter end 22 of the charging cable 200 is used to detachably plug the power adapter 300. At this time, the charging cable 200 can convert low-voltage direct current into low-voltage alternating current (for example, the voltage is in the range of 5V to 12V, and the frequency is 127.7KHz) to be coupled to the electronic device 100. After the power adapter 300 is plugged into a power socket, the power in the power socket can be transmitted to the electronic device 100 through the power adapter 300 and the charging cable 200 to charge the electronic device 100.

In other embodiments, the adapter end 22 can also be used to detachably plug in a power source such as a power bank, and the power source charges the electronic device 100 through the charging cable 200. Exemplarily, some electronic devices (such as laptop computers) that carry the battery 16 can also be used as a power source to power the electronic device 100 to be charged.

Please refer to FIG. 1 and FIG. 2 together. FIG. 2 is a schematic structural diagram of the electronic device 100 of the wireless charging system 1000 shown in FIG. 1. The viewing angle of the electronic device 100 shown in FIG. 2 is the viewing angle after the viewing angle of the electronic device 100 shown in FIG. 1 is flipped.

The electronic device 100 includes a back cover 11, a frame 12, a display screen 13, a first camera module 14, an earpiece module 15, a battery 16, a charging assembly 17, a main circuit board 18, a processor 19, a memory 110, and a second camera module Group 120.

As shown in FIGS. 1 and 2, the frame 12 is circumferentially connected to the periphery of the back cover 11. The display screen 13 is installed on the side of the frame 12 away from the back cover 11, that is, the display screen 13 and the back cover 11 are installed on opposite sides of the frame 12 respectively. The inner side of the frame 12 forms the internal cavity of the electronic device 100, and the display screen 13 and the back cover 11 respectively cover both sides of the internal cavity of the entire device, that is, the display screen 13, the frame 12 and the back cover 11 jointly enclose the internal cavity of the entire device. Cavity. In this embodiment, the electronic device 100 has a flat-panel structure as an example for description. Wherein, the frame 12 and the back cover 11 may be an integral structure, or may be assembled (such as snap connection, bonding, etc.) to form an integral structure.

In some embodiments, the electronic device 100 may further include a midplane (not shown in the figure). The middle plate is fixed inside the frame 12, and the middle plate and the frame 12 together form the middle frame of the electronic device 100. One or more positioning structures such as positioning posts and positioning holes may be provided on the middle plate to fix the components of the electronic device 100 installed in the internal cavity of the whole machine.

As shown in FIG. 1, the display screen 13 includes a front cover 131 and a display module 132 fixed to the front cover 131, and the display module 132 is located on the side of the front cover 131 facing the rear cover 11. The display module 132 can integrate display and touch functions. The front cover 131 is provided with an earpiece through hole 1321 and a light-transmitting area 1322.

The earpiece module 15 is located inside the frame 12. The earpiece module 15 is used to convert electrical signals into sound signals. The earpiece module 15 can emit sound to the outside of the electronic device 100 through the earpiece through hole 1321. The first camera module 14 is located inside the frame 12, and the first camera module 14 is used for shooting, and the first camera module 14 can collect images through the light-transmitting area 1322.

As shown in FIG. 2, the battery 16 is located inside the frame 12. The battery 16 is used to supply power to the electrical components of the electronic device 100. The battery 16 may be a lithium battery capable of cyclic charging and discharging. The charging assembly 17 is located inside the frame 12. In this embodiment, the charging assembly 17 is located at the bottom area of the electronic device 100 as an example for description. The charging assembly 17 is connected to the battery 16, and the charging assembly 17 is used to charge the battery 16.

The main circuit board 18 may be a printed circuit board (PCB). The main circuit board 18 is connected to the battery 16. The processor 19 and the memory 110 are fixed on the main circuit board 18. The memory 110 is used to store computer program codes. The computer program code includes computer instructions. The processor 19 is used for invoking computer instructions to make the electronic device 100 perform corresponding operations. The first camera module 14, the earpiece module 15, the charging assembly 17, and the second camera module 120 are connected to the main circuit board 18 to be electrically connected to the processor 19. The shooting direction of the second camera module 120 is opposite to the shooting direction of the first camera module 14. The second camera module 120 may include multiple lenses to realize multiple shooting modes such as normal shooting, telephoto shooting, and wide-angle shooting.

In some embodiments, the electronic device 100 may also include modules such as an antenna module, a mobile communication module, a sensor module, a motor, a microphone module, and a speaker module. The antenna module is used to transmit and receive electromagnetic wave signals. The antenna module can include multiple antennas, and each antenna can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. The mobile communication module can provide wireless communication solutions including 2G/3G/4G/5G, etc., which are applied to the electronic device 100. The sensor module may include one or more of a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, or an ambient light sensor. The motor can produce vibration prompts. The motor can be used for incoming call vibrating reminders, and it can also be used for touch vibration feedback. The microphone module is used to convert sound signals into electrical signals. The speaker module is used to convert electrical signals into sound signals.

In some embodiments, the electronic device 100 uses a bone conduction module instead of the earpiece module 15. The bone conduction module uses bones to induce hearing. At this time, the front cover 131 does not need to be provided with an earpiece through hole 1321.

Please refer to FIGS. 3 and 4 together. FIG. 3 is a schematic structural diagram of the charging assembly 17 of the electronic device 100 shown in FIG. 2, and FIG. 4 is an exploded schematic diagram of the charging assembly 17 shown in FIG. 3.

The charging assembly 17 of the electronic device 100 includes a receiving magnetic rod 171, a receiving coil 172, a fixing member 173, a first magnetic attraction assembly 174, a first circuit board 175, and a plurality of electronic components 176 mounted on the first circuit board 175. 2 and 3 in combination, the charging assembly 17 is located inside the frame 12, that is, the magnetic receiving bar 171 of the charging assembly 17 and the first magnetic attraction assembly 174 are all located inside the frame 12.

As shown in FIGS. 3 and 4, the receiving magnet bar 171 includes a first receiving end portion 1711, a middle portion 1712, and a second receiving end portion 1713 that are connected in sequence. The receiving coil 172 is wound around the middle part 1712 of the receiving magnet bar 171. Exemplarily, the receiving magnetic rod 171 is roughly in the shape of a rectangular column. The middle portion 1712 of the receiving magnet bar 171 is recessed relative to the first receiving end portion 1711 and the second receiving end portion 1713 to form a recessed space at the periphery of the middle portion 1712 of the receiving magnet bar 171. The receiving coil 172 may be located in the recessed space, so that the volume of the assembled structure of the receiving magnet bar 171 and the receiving coil 172 is small. The receiving coil 172 is wound around the extension direction of the middle portion 1712, and the extension direction of the middle portion 1712 is the direction from which the end connected to the first receiving end portion 1711 extends to the end connected to the second receiving end portion 1713.

Exemplarily, as shown in FIG. 4, the first receiving end portion 1711 includes an end surface 1711a and a first side surface 1711b, a second side surface 1711c, a third side surface 1711d, and a fourth side surface 1711e that are sequentially connected to the periphery of the end surface 1711a. The first side surface 1711b of the first receiving end portion 1711 is opposite to the third side surface 1711d, and the second side surface 1711c is opposite to the fourth side surface 1711e. The area of the second side surface 1711c of the first receiving end portion 1711 is larger than the area of the first side surface 1711b.

The second receiving end portion 1713 includes an end surface 1713a, and a first side surface 1713b, a second side surface 1713c, a third side surface 1713d, and a fourth side surface 1713e that are circumferentially connected to the periphery of the end surface 1713a in sequence. The first side surface 1713b of the second receiving end portion 1713 is opposite to the third side surface 1713d, and the second side surface 1713c is opposite to the fourth side surface 1713e. The area of the second side surface 1713c of the first receiving end portion 1713 is larger than the area of the first side surface 1713b.

The first side surface 1713b of the second receiving end portion 1713 and the first side surface 1711b of the first receiving end portion 1711 face the same, and the second side surface 1713c of the second receiving end portion 1713 and the second side surface 1711c of the first receiving end portion 1711 face the same. Exemplarily, the first side surface 1713b of the second receiving end portion 1713 is coplanar with the first side surface 1711b of the first receiving end portion 1711, and the second side surface 1713c of the second receiving end portion 1713 and the first side surface 1711b of the first receiving end portion 1711 are coplanar. The two sides 1711c are coplanar.

The receiving magnet bar 171 includes a first receiving coupling surface 1714 and a second receiving coupling surface 1715 intersecting the first receiving coupling surface 1714. The first receiving coupling surface 1714 includes a first side surface 1711 b of the first receiving end portion 1711 and a first side surface 1713 b of the second receiving end portion 1713. The second receiving coupling surface 1715 includes a second side surface 1711 c of the first receiving end portion 1711 and a second side surface 1713 c of the second receiving end portion 1713. The area of the second receiving coupling surface 1715 is larger than the area of the first receiving coupling surface 1714.

2 and 4 in combination, the first receiving coupling surface 1714 of the receiving magnet bar 171 may be disposed facing the frame 12, and the second receiving coupling surface 1715 may be disposed facing the rear cover 11. In this embodiment, it is defined that the width direction of the electronic device 100 is the first direction X, the length direction is the second direction Y, and the thickness direction is the third direction Z. In order to meet the needs of lighter and thinner and large-screen display of the electronic device 100, the size in the width direction X and the size in the length direction Y are larger, while the size in the thickness direction Z is smaller. In this embodiment, the arrangement direction of the first receiving end portion 1711, the middle portion 1712, and the second receiving end portion 1713 of the receiving magnet bar 171 is parallel to the width direction X of the electronic device 100, and faces the first receiving coupling surface 1714 of the frame 12. The area is smaller than the area of the second receiving coupling surface 1715 facing the back cover 11, so the size of the receiving magnet bar 171 in the thickness direction Z of the electronic device 100 is smaller than the size in the length direction Y of the electronic device 100, so that the receiving magnet bar 171 By making full use of the internal space of the electronic device 100, a coupling surface with a larger area can be provided to obtain a faster charging speed, and an increase in the thickness of the electronic device 100 can also be avoided.

As shown in FIGS. 3 and 4, the fixing member 173 is used to fix the receiving magnet bar 171 on the inner side of the frame 12. In this embodiment, the fixing member 173 includes a fixing body 1731 and a fastener 1732. The fixing body 1731 is installed outside the receiving magnet bar 171. The fastener 1732 is used to lock the fixing body 1731 to the middle plate to indirectly fix the receiving magnet. Stick 171. In other embodiments, the fastener 1732 can also lock the fixed body 1731 to the frame 12 or the back cover 11.

Exemplarily, the fixed body 1731 includes a first plate portion 1731a, a second plate portion 1731b, a third plate portion 1731c, a first plate piece 1731d, a second plate piece 1731e, a first fastening portion 1731f, and a second fastening portion 1731g. The first plate portion 1731a and the third plate portion 1731c are respectively connected to both sides of the second plate portion 1731b, and are bent relative to the second plate portion 1731b. The first board portion 1731a is provided with a wiring through hole 1731h. The first plate 1731d connects the first plate 1731a and the second plate 1731b, and is bent relative to the first plate 1731a and the second plate 1731b. The second plate 1731e connects the second plate 1731b and the third plate 1731c, and is bent relative to the second plate 1731b and the third plate 1731c. The first fastening portion 1731f is connected to the first plate portion 1731a and is located on the side of the first plate portion 1731a away from the third plate portion 1731c, and the first fastening portion 1731f is provided with a fastening hole 1731i. The second fastening portion 1731g is connected to the third plate portion 1731c and is located on the side of the third plate portion 1731c away from the first plate portion 1731a. The second fastening portion 1731g is provided with a fastening hole 1731j.

When the fixing member 173 fixes and receives the magnet bar 171, the second plate portion 1731b contacts the third side surface 1711d of the first receiving end portion 1711 and the third side surface 1713d of the second receiving end portion 1713, and the receiving coil 172 partially passes through the wiring through hole 1731h, the first plate portion 1731a contacts the end surface 1711a of the first receiving end portion 1711, the third plate portion 1731c contacts the end surface 1713a of the second receiving end portion 1713, and the first plate 1731d contacts the second side surface 1711c of the first receiving end portion 1711 , The second plate 1731e contacts the second side surface 1713c of the second receiving end 1713, part of the fastener 1732 passes through the fastening hole 1731i of the first fastening part 1731f to fix the first fastening part 1731f, and the other part of the fastener 1732 passes through the fastening hole 1731j of the second fastening portion 1731g to fix the second fastening portion 1731g. It can be understood that the fixing member 173 may also have other structures, and the installation and fixation with the receiving magnetic rod 171 may also be implemented in other ways, which is not strictly limited in this application.

Exemplarily, the fixing member 173 uses a non-ferromagnetic material to prevent the wireless charging electromagnetic field from passing through the fixing member 173, thereby reducing the influence on the efficiency of wireless charging. The non-ferromagnetic material can be, but is not limited to, austenitic stainless steel.

In other embodiments, the magnetic receiving bar 171 can also be fixed on the inner side of the frame 12 by dispensing glue. For example, the magnetic receiving rod 171 is bonded to the frame 12, the middle plate, or the back cover 11 by an adhesive. Alternatively, the intermediate structure that fixes and receives the magnet bar 171 is bonded to the frame 12, the middle plate or the back cover 11 through an adhesive, so as to fix and receive the magnet bar 171.

As shown in FIGS. 3 and 4, the first magnetic attraction assembly 174 is arranged around the receiving magnet bar 171. The first magnetic attraction component 174 is used to attract each other with the second magnetic attraction component (see below) of the charging cable 200. Exemplarily, the magnetic attraction blocks of the first magnetic attraction assembly 174 are arranged in pairs and symmetrically on both sides of the receiving magnetic rod 171. For example, the first magnetic attraction assembly 174 includes two first magnetic attraction blocks 1741 and two second magnetic attraction blocks 1742. As shown in FIG. 3, the two first magnetic blocks 1741 are arranged on both sides of the receiving magnetic rod 171 respectively, and the second magnetic blocks 1742 are arranged on both sides of the receiving magnetic rod 171 respectively. The two sides of the receiving magnet bar 171 refer to the side of the first receiving end portion 1711 away from the middle portion 1712 and the side of the second receiving end portion 1713 away from the middle portion 1712.

Wherein, on the same side where the magnetic rod 171 is received, the first magnetic block 1741 is located between the frame 12 (refer to FIG. 2) and the second magnetic block 1742. The two first magnetic blocks 1741 are arranged close to the first receiving coupling surface 1714, and the two second magnetic blocks 1742 are arranged close to the third side surface 1711d of the first receiving end portion 1711 and the third side surface 1713d of the second receiving end portion 1713. . The first magnetic block 1741 and the second magnetic block 1742 located on the same side of the receiving magnetic rod 171 are spaced apart from each other. Exemplarily, the first magnetic block 1741 and the second magnetic block 1742 may be square or rectangular. In other embodiments, the first magnetic block 1741 and the second magnetic block 1742 may also have other shapes, which are not strictly limited in this application.

As shown in FIGS. 3 and 4, a plurality of electronic components 176 are mounted on the first circuit board 175, and two ends of the receiving coil 172 are connected to the first circuit board 175 to electrically connect the plurality of electronic components 176. The first circuit board 175 may be a printed circuit board. The detailed description of the multiple electronic components 176 is detailed later. The first circuit board 175 is electrically connected to the battery 16 so that the receiving coil 172 is electrically connected to the battery 16. In other embodiments, the first circuit board 175 may also be integrated in the main circuit board 18 of the electronic device 100. At this time, the two ends of the receiving coil 172 are connected to the main circuit board 18, and a plurality of electronic components 176 are installed on the main circuit board 18. The circuit board 18 or the electronic components (such as the processor 19) integrated on the main circuit board 18 are not strictly limited in this application.

Please refer to FIGS. 5 and 6 together. FIG. 5 is an exploded schematic diagram of the charging end 21 of the charging cable 200 shown in FIG. 1, and FIG. 6 is a partial structural diagram of the charging end 21 of the charging cable 200 shown in FIG. 1 .

The charging end 21 of the charging cable 200 includes a charging head housing 211, a transmitting magnetic rod 212, a transmitting coil 213, a second magnetic attraction component 214, a reinforcing sleeve 215, a second circuit board 216, and is mounted on the second circuit board 216 A number of electronic components 217. The transmitting magnetic rod 212, the transmitting coil 213, the second magnetic attraction component 214, the reinforcing sleeve 215, the second circuit board 216, and a plurality of electronic components 217 mounted on the second circuit board 216 are all located inside the charging head housing 211 . The charging head housing 211 can be made by injection molding. A gap is formed between the outer surface of each component located inside the charging head housing 211 and the outer surface of the charging head housing 211. The charging head housing 211 can fully protect and avoid problems such as wear and oxidation of its internal components.

As shown in FIG. 5, the charging head housing 211 includes a housing end surface 2111 and a housing side surface 2112 connected to the periphery of the housing end surface 2111. Exemplarily, the charging head housing 211 is substantially in the shape of a flat plate, and the charging head housing 211 includes two housing side surfaces 2112 arranged opposite to each other and two housing side arc surfaces 2113 arranged opposite to each other. The side surface 2112 of the housing is a flat surface, and the two side surfaces 2112 of the housing may be arranged in parallel. The two shell-side arc surfaces 2113 are also connected to the periphery of the shell end surface 2111, and the two shell-side arc surfaces 2113 are connected between the two shell side surfaces 2112.

The charging head housing 211 further includes a connecting end surface 2114 and a cable protection portion 2115. The connecting end surface 2114 is arranged opposite to the housing end surface 2111, and the connecting end surface 2114 is connected to the housing side surface 2112 and the housing side arc surface 2113. The cable portion 23 (refer to FIG. 1) of the charging cable 200 extends into the inside of the charging head housing 211 through the connecting end surface 2114 to connect to the charging end 21. The cable protection portion 2115 is provided at the connection end surface 2114 and is used to protect part of the cable portion 23.

As shown in FIGS. 5 and 6, the structure of the transmitting magnetic bar 212 is the same as or similar to the structure of the receiving magnetic bar 171 of the electronic device 100. The transmitting magnet bar 212 includes a first transmitting end portion 2121, a middle portion 2122, and a second transmitting end portion 2123 connected in sequence. The transmitting coil 213 is wound around the middle part 2122 of the transmitting magnetic rod 212. Exemplarily, the transmitting magnetic rod 212 is substantially in the shape of a rectangular column. The middle portion 2122 of the transmitting magnet bar 212 is concave relative to the first emitting end portion 2121 and the second emitting end portion 2123 to form a recessed space at the periphery of the middle portion 2122 of the emitting magnet bar 212. The transmitting coil 213 may be located in the recessed space, so that the volume of the assembled structure of the transmitting magnetic rod 212 and the transmitting coil 213 is small. Wherein, the transmitting coil 213 is wound around the extending direction of the middle portion 2122, and the extending direction of the middle portion 2122 is the direction in which the end connecting the first transmitting end portion 2121 extends to the end connecting the second transmitting end portion 2123.

Exemplarily, as shown in FIG. 5, the first emitting end portion 2121 includes an end surface 2121a and a first side surface 2121b, a second side surface 2121c, a third side surface 2121d, and a fourth side surface 2121e that are sequentially connected to the periphery of the end surface 2121a. The first side surface 2121b and the third side surface 2121d of the first emitting end portion 2121 are disposed opposite to each other, and the second side surface 2121c is disposed opposite to the fourth side surface 2121e. The area of the second side surface 2121c and the fourth side surface 2121e of the first emitting end portion 2121 is larger than the area of the first side surface 2121b and the third side surface 2121d.

The second emitting end portion 2123 includes an end surface 2123a and a first side surface 2123b, a second side surface 2123c, a third side surface 2123d, and a fourth side surface 2123e that are sequentially connected to the periphery of the end surface 2123a. The first side surface 2123b and the third side surface 2123d of the second emitting end portion 2123 are disposed opposite to each other, and the second side surface 2123c is disposed opposite to the fourth side surface 2123e. The area of the second side surface 2123c and the fourth side surface 2123e of the second emitting end portion 2123 is larger than the area of the first side surface 2123b and the third side surface 2123d.

The first side surface 2123b of the second emitting end portion 2123 and the first side surface 2121b of the first emitting end portion 2121 face the same, and the second side surface 2123c of the second emitting end portion 2123 and the second side surface 2121c of the first emitting end portion 2121 face the same. Exemplarily, the first side surface 2123b of the second emitting end portion 2123 is coplanar with the first side surface 2121b of the first emitting end portion 2121, and the second side surface 2123c of the second emitting end portion 2123 is opposite to the first side surface 2123c of the first emitting end portion 2121. The two sides 2121c are coplanar.

The transmitting magnet bar 212 includes a first transmitting coupling surface 2124 and a second transmitting coupling surface 2125 intersecting the first transmitting coupling surface 2124. The first emission coupling surface 2124 includes a first side surface 2121 b of the first emission end portion 2121 and a first side surface 2123 b of the second emission end portion 2123. The second emission coupling surface 2125 includes a second side surface 2121 c of the first emission end portion 2121 and a second side surface 2123 c of the second emission end portion 2123. The area of the second emission coupling surface 2125 is larger than the area of the first emission coupling surface 2124. The number of the second emission coupling surface 2125 may be two, and the other second emission coupling surface 2125 may include the fourth side surface 2121e of the first emitting end portion 2121 and the fourth side surface 2123e of the second emitting end portion 2123.

5 and 6 in combination, the first transmitting coupling surface 2124 of the transmitting magnet bar 212 may face the end surface 2111 of the housing, and the second transmitting coupling surface 2125 may face the side surface 2112 of the housing. In this embodiment, the charging end 21 is substantially flat, and the shape of the transmitting magnet bar 212 is similar to the shape of the charging end 21, and when installed inside the charging head housing 211 of the charging end 21, its area is small The surface (that is, the first emission coupling surface 2124) is directly opposite to the housing end surface 2111 of the charging head housing 211, and the larger surface (that is, the second emission coupling surface 2125) is directly opposite to the housing side surface 2112 of the charging head housing 211. Yes, in order to make full use of the internal space of the charging head housing 211, a coupling surface with a larger area can be provided to obtain a faster charging speed, and a significant increase in the volume of the charging end 21 can also be avoided.

As shown in FIGS. 5 and 6, the second circuit board 216 is located on the side of the transmitting magnet bar 212 away from the end face 2111 of the housing. The second circuit board 216 may be a printed circuit board. A plurality of electronic components 217 are mounted on the second circuit board 216, and two ends of the transmitting coil 213 are connected to the second circuit board 216 to electrically connect the plurality of electronic components 217. The detailed description of the multiple electronic components 217 is detailed later. The second circuit board 216 is electrically connected to the wires in the cable portion 23 of the charging cable 200.

In an embodiment, the charging end 21 may further include a fixing glue (not shown in the figure), which is fixed to the second circuit board 216 and covers the electronic components 217 on the second circuit board 216 to Protect electronic components 217. Among them, the fixing glue can be ultraviolet curing glue or hot melt glue, and the implementation of fixing glue is not strictly limited in this application.

As shown in FIGS. 5 and 6, the reinforcing sleeve 215 is located on the side of the transmitting magnet bar 212 away from the end face 2111 of the housing. The reinforcing sleeve 215 is sleeved on the outer side of the second circuit board 216 and the fixing glue to form a physical protection. Exemplarily, the reinforcing sleeve 215 may be made of high-strength materials such as steel materials and stainless steel materials.

As shown in FIG. 5 and FIG. 6, the second magnetic attraction component 214 is arranged around the periphery of the transmitting magnetic rod 212. The second magnetic attraction component 214 is used to attract each other with the first magnetic attraction component 174 of the electronic device 100. Exemplarily, the magnetic blocks of the second magnetic attraction component 214 are arranged in pairs and symmetrically on both sides of the transmitting magnetic rod 212. For example, the second magnetic attraction assembly 214 includes two third magnetic attraction blocks 2141 and two fourth magnetic attraction blocks 2142. As shown in FIG. 6, the two third magnetic blocks 2141 are respectively arranged on both sides of the transmitting magnetic rod 212, and the two fourth magnetic blocks 2142 are respectively arranged on both sides of the transmitting magnetic rod 212. The two sides of the emitting magnet bar 212 refer to the side of the first emitting end portion 2121 away from the middle portion 2122 and the side of the second emitting end portion 2123 away from the middle portion 2122.

Referring to FIGS. 5 and 6 in combination, on the same side of the transmitting magnetic rod 212, the third magnetic block 2141 is located between the shell end surface 2111 and the fourth magnetic block 2142. The two third magnetic blocks 2141 are arranged close to the first emitting coupling surface 2124, and the two fourth magnetic blocks 2142 are arranged close to the third side surface 2121d of the first emitting end portion 2121 and the third side surface 2123d of the second emitting end portion 2123. . The third magnetic block 2141 and the fourth magnetic block 2142 located on the same side of the transmitting magnetic rod 212 are spaced apart from each other. Exemplarily, the third magnetic block 2141 and the fourth magnetic block 2142 may be square or rectangular. In other embodiments, the third magnetic block 2141 and the fourth magnetic block 2142 may also have other shapes, which are not strictly limited in this application.

It is understandable that the first magnetic attraction component 174 of the electronic device 100 and the second magnetic attraction component 214 of the charging end 21 are attracted to each other, and the materials of the two can be combined in many ways: for example, in one embodiment, the first One magnetic attraction component 174 uses a magnet (for example, neodymium iron boron), and the second magnetic attraction component 214 uses a magnet, and the magnetic properties of the two are opposite. In another embodiment, the first magnetic attraction component 174 is made of ferromagnetic materials (for example, iron, cobalt, nickel, and alloys thereof), and the second magnetic attraction component 214 is made of magnets. At this time, the first magnetic attraction component 174 of the electronic device 100 will not absorb some ferromagnetic debris in the environment, such as keychains, iron filings, etc., which is beneficial to keeping the outer surface of the electronic device 100 clean.

In the embodiment of the present application, the charging cable 200 of the wireless charging system 1000 charges the electronic device 100 in a first charging mode and a second charging mode. The wireless charging system 1000 can realize dual-mode coupling, the first charging mode and The charging connection mode of the second charging mode is different, so that the charging mode of the wireless charging system 1000 is more diversified, the user experience is better, and the application range is wider. An example is given below.

Please refer to FIGS. 7 and 8 together. FIG. 7 is a schematic structural diagram of the wireless charging system 1000 shown in FIG. 1 when it is in a first charging mode, and FIG. 8 is a structural schematic diagram of a partial structure of the wireless charging system 1000 shown in FIG. 7. FIG. 8 shows the transmitting magnetic rod 212 and the transmitting coil 213 of the charging cable 200 and the receiving magnetic rod 171 and the receiving coil 172 of the electronic device 100.

When the wireless charging system 1000 is in the first charging mode, the housing end surface 2111 of the charging head housing 211 of the charging cable 200 contacts the frame 12 of the electronic device 100, and the first transmitting coupling surface 2124 faces the first receiving coupling surface 1714. At this time, the first side surface 2121b of the first transmitting end portion 2121 and the first side surface 1711b of the first receiving end portion 1711 are arranged face to face, and the first side surface 2123b of the second transmitting end portion 2123 is opposite to the first side surface 2123b of the second receiving end portion 1713. The side faces 1713b are arranged face to face.

Please refer to FIG. 9, which is a schematic diagram of the distribution of magnetic lines of force when the structure shown in FIG. 8 works. When the wireless charging system 1000 is in the first charging mode, the alternating current of the charging cable 200 passes through the transmitting coil 213 to generate an alternating magnetic field, the transmitting magnetic rod 212 guides the direction of the magnetic field lines, and the magnetic field lines of the transmitting magnetic rod 212 pass through the first transmitting coupling surface 2124 and the first receiving coupling surface 1714, the receiving magnetic rod 171 coupled to the electronic device 100, the receiving coil 172 wound around the receiving magnetic rod 171 induces an alternating current, and the alternating current is rectified and stabilized (described later) That is, the battery 16 of the electronic device 100 can be charged. In short, when the wireless charging system 1000 is in the first charging mode, the transmitting coil 213 and the receiving coil 172 are coupled. At this time, the energy of the charging cable 200 is coupled from the transmitting coil 213 to the receiving coil 172, thereby wirelessly charging the battery 16 of the electronic device 100.

Please refer to FIGS. 10 and 11 together. FIG. 10 is a schematic structural diagram of the wireless charging system 1000 shown in FIG. 1 when it is in the second charging mode, and FIG. 11 is a structural schematic diagram of a partial structure of the wireless charging system 1000 shown in FIG. 10. FIG. 11 shows the transmitting magnetic rod 212 and the transmitting coil 213 of the charging cable 200 and the receiving magnetic rod 171 and the receiving coil 172 of the electronic device 100.

When the wireless charging system 1000 is in the second charging mode, the housing side surface 2112 of the charging head housing 211 of the charging cable 200 contacts the back cover 11 of the electronic device 100, and the second transmitting coupling surface 2125 faces the second receiving coupling surface 1715. At this time, the second side surface 2121c of the first transmitting end portion 2121 and the second side surface 1711c of the first receiving end portion 1711 are arranged face to face, and the second side surface 2123c of the second transmitting end portion 2123 is opposite to the second side surface 2123c of the second receiving end portion 1713. The side surfaces 1713c are arranged face to face.

Please refer to FIG. 12, which is a schematic diagram of the distribution of magnetic lines of force when the structure shown in FIG. 11 is in operation. When the wireless charging system 1000 is in the second charging mode, the alternating current of the charging cable 200 passes through the transmitting coil 213 to generate an alternating magnetic field, the transmitting magnetic rod 212 guides the direction of the magnetic field lines, and the magnetic field lines of the transmitting magnetic rod 212 pass through the second transmitting coupling surface 2125 and the second receiving coupling surface 1715, the receiving magnetic rod 171 coupled to the electronic device 100, the receiving coil 172 wound around the receiving magnetic rod 171 induces an alternating current, and the alternating current is rectified and stabilized (described later) That is, the battery 16 of the electronic device 100 can be charged. In short, when the wireless charging system 1000 is in the second charging mode, the transmitting coil 213 and the receiving coil 172 are coupled. At this time, the energy of the charging cable 200 is coupled from the transmitting coil 213 to the receiving coil 172, thereby wirelessly charging the battery 16 of the electronic device 100.

Therefore, in the embodiment of the present application, the magnetic field lines of the transmitting magnetic rod 212 of the charging cable 200 can be coupled to the first receiving coupling surface 1714 of the receiving magnetic rod 171 through the first transmitting coupling surface 2124, so as to be in the first charging mode. To charge the electronic device 100 in the second charging mode, the magnetic field lines of the transmitting magnetic rod 212 can also be coupled to the second receiving coupling surface 1715 of the receiving magnetic rod 171 through the second transmitting coupling surface 2125, so as to charge the electronic device 100 in the second charging mode. Therefore, the wireless charging system 1000 has two charging modes. In the two charging modes, the charging cable 200 connects to the electronic device 100 in different ways. Therefore, the wireless charging system 1000 has more diversified charging methods, which is conducive to the multi-scenarios of wireless charging. Coverage makes the wireless charging experience of the electronic device 100 better.

It is understandable that when the wireless charging system 1000 is in the second charging mode, both sides 2112 of the charging head housing 211 can contact the rear cover 11 to realize charging. Specifically, the wireless charging system 1000 has no restriction on the polarity (that is, the winding direction) of the receiving coil 172 and the transmitting coil 213, and the charging head housing 211 does not need to be distinguished between the front and the back, and any one of the two housing sides 2112 contacts the back cover 11. After that, the transmitting coil 213 can be coupled with the receiving coil 172, so that the charging cable 200 can be charged after being connected in any direction, and the user experience is good.

In the embodiment of the present application, when the wireless charging system 1000 is in the first charging mode, the coupling coefficient between the transmitting coil 213 and the receiving coil 172 is the first coupling coefficient. When the wireless charging system 1000 is in the second charging mode, the transmitting coil 213 and the receiving coil 172 are The coupling coefficient of the coil 172 is the second coupling coefficient, and the second coupling coefficient is greater than the first coupling coefficient.

At this time, the charging speed of the electronic device 100 in the second charging mode is faster than the charging speed in the first charging mode. The first charging mode corresponds to normal charging, and the second charging mode corresponds to fast charging to realize wireless charging. Multi-scene mode coverage. The user can flexibly select the charging speed of the electronic device 100 according to their specific needs, so that the wireless charging experience of the electronic device 100 is better. For example, compared to fast charging, ordinary charging has low charging power, which can extend the cycle life of the battery 16 of the electronic device 100, thereby reducing the capacity degradation of the battery 16. Therefore, in the case of loose time (such as sleeping at night), The user can choose normal charging, and when the time is relatively short (for example, when there is an urgent need to go out), the user can choose fast charging.

Please refer to FIG. 13, which is a schematic structural diagram of the transmitting magnetic rod 212 of the wireless charging system 1000 shown in FIG. 1 in a possible embodiment. In an exemplary embodiment, the outer dimension of the transmitting magnet bar 212 in the first direction X is 20 mm, the outer dimension in the second direction Y is 10 mm, and the outer dimension in the third direction Z is 3.7 mm. That is, the external size of the transmitting magnetic rod 212 is 20 mm x 10 mm x 3.7 mm. The first emitting end 2121 and the second emitting end 2123 of the emitting magnet 212 are symmetrically arranged. The size of the first emitting end 2121 in the first direction X is 6 mm. The size of the middle part 2122 of the transmitting magnet 212 in the second direction Y is 8.9 mm, and the size in the third direction Z is 2.6 mm. The material of the transmitting magnet rod 212 is an iron-based nanocrystalline alloy, the relative magnetic permeability is 6000, and the saturation magnetic induction intensity is 1.2 Tesla (T). The material, size and structure of the receiving magnetic rod 171 are the same as the transmitting magnetic rod 212.

4 and 5 in combination, the transmitting coil 213 is wound around the outside of the middle part 2122 of the transmitting magnetic rod 212, using Litz wire, the wire diameter is 0.5 mm, and the number of turns of the transmitting coil 213 is 13 turns. The receiving coil 172 is wound around the outside of the middle part 1712 of the receiving magnetic rod 171, using Litz wire, the wire diameter is 0.5 mm, and the number of turns of the transmitting coil 213 is 12 turns.

Through simulation, in the first charging mode, the inductance value of the transmitting coil 213 is 8.8 microhenries (uH), the inductance value of the receiving coil 172 is 7.5uH, and the coupling coefficient between the receiving coil 172 and the transmitting coil 213 (that is, The first coupling coefficient) k=0.4, the wireless charging power can reach 10 watts (W), the voltage is 10 volts (V), and the current is 1.0 ampere (A). At this time, the current of the transmitting coil 213 is 6A, and the maximum magnetic flux density in the transmitting magnet 212 is 688mT; the current of the receiving coil 172 is 2A, and the maximum magnetic flux density of the receiving magnet 171 is 487mT. The maximum magnetic induction intensity is lower than the saturation magnetic induction intensity of nanocrystalline materials (typical value 1.2T).

In the second charging mode, the inductance value of the transmitting coil 213 is 11.4uH, the inductance value of the receiving coil 172 is 9.7uH, and the coupling coefficient between the receiving coil 172 and the transmitting coil 213 (that is, the second coupling coefficient) k=0.6 , The wireless charging power of the charging cable 200 to the electronic device 100 can reach 30W, the voltage is 20V, and the current is 1.5A. At this time, the current of the transmitting coil 213 is 5.4A, and the maximum magnetic induction intensity in the transmitting magnet 212 is 625mT; the current of the receiving coil 172 is 3A, and the maximum magnetic induction intensity of the receiving magnet 171 is 581mT. The maximum magnetic induction intensity of are lower than the saturation magnetic induction intensity of nanocrystalline materials (typical value 1.2T).

In this embodiment, the external dimensions of the receiving magnetic rod 171 and the transmitting magnetic rod 212 only need 20mm x 10mm x 3.7mm, which can achieve 30W wireless charging, which is compared with the traditional flat spiral charging coil (for example, in the Qi standard). , The outer diameter of the A11 coil reaches 44mm) is much smaller, so the charging end 21 of the wireless charging cable 200 is small in size and easy to carry, and the charging end 21 can be adsorbed on the electronic device 100 during wireless charging to realize simultaneous charging The function of playing.

In addition, in the wireless charging system 1000 of this embodiment in the second charging mode, the wireless charging power of the charging cable 200 to the electronic device 100 can reach 30W, which is equivalent to the charging power of traditional wired fast charging and higher than that of traditional wireless charging technology. Power (up to 20W). The power of traditional wireless charging technology is difficult to increase, mainly because the wireless charging coils under the current Qi specification are all flat spiral wire structures, which are very thin in thickness (the typical thickness of the copper conductive layer is 0.15mm), which leads to wireless charging The DC impedance of the coil is relatively large (typical value is 225mΩ), which in turn leads to serious heat generation during wireless charging. At the same time, since the wireless charging coil is large in size and must be located in the center of the electronic device, the wireless charging coil overlaps the battery (generally, the wireless charging coil covers the surface of the battery), and the heating of the coil is easily conducted to the battery. The safety of the battery is strongly related to the charging temperature (it needs to be lower than 45°C during charging). When the battery temperature reaches the upper limit, the charging power must be limited to ensure safety, resulting in a slow charging speed.

It is understandable that during the charging process of the wireless charging system 1000, the transmitting power is formed at the transmitting coil 213 and the receiving power is formed at the receiving coil 172. Due to the coupling degree between the receiving coil 172 and the transmitting coil 213, the transmitting power may not be all. It is transmitted to the receiving coil 172, so the receiving power is less than the transmitting power, and the current in the receiving coil 213 is also less than the current in the transmitting coil 172. In the electronic device 100, the AC power in the receiving coil 213 is rectified into DC power by the wireless charging receiving control chip, and the DC power can be directly used by the subsequent circuit. In the embodiment of the present application, the power of the DC power output by the wireless charging receiving control chip is defined as The wireless charging power of the wireless charging system 1000. If the rectification efficiency of the wireless charging receiving control chip and the loss of the receiving coil 213 are not considered, the receiving power of the receiving coil 213 is equal to the wireless charging power, which is described in this application as an example.

The receiving magnet bar 171 and the receiving coil 172 of the embodiment of the present application have a small size after being assembled, and can avoid the position of the battery 16 and be placed on the bottom or the side of the electronic device 100 to avoid increasing the thickness of the electronic device 100. At the same time, the receiving coil 172 uses Litz wire. The diameter of the Litz wire is large (about 0.5mm), which can greatly reduce the coil impedance (which can be reduced to 20mΩ), which is about one-tenth of the traditional wireless charging coil. The calorific value of the current can be reduced by 90%, so that wireless charging can be continuously carried out with high power, which shortens the charging time and enhances the wireless charging experience.

In this embodiment, the coupling coefficient between the receiving coil 172 and the transmitting coil 213 determines the charging speed of the wireless charging system 1000. It can be understood that the coupling coefficient between the coils is generally related to the coupling area between the coupling surfaces of the magnetic rod, the coupling distance, and the material of the electromagnetic rod. In this embodiment, since the area of the second receiving coupling surface 1715 is larger than the area of the first receiving coupling surface 1714, and the area of the second transmitting coupling surface 2125 is larger than the area of the first transmitting coupling surface 2124, it is easier to realize that the second coupling coefficient is greater than The first coupling coefficient realizes the difference in charging speeds of multiple charging modes, so as to meet the demand for diversified charging speeds. Exemplarily, the area of the second receiving coupling surface 1715 is the same as or similar to the area of the first transmitting coupling surface 2124, and the area of the first receiving coupling surface 1714 is the same as or similar to the area of the first transmitting coupling surface 2124.

In addition, the wireless charging system 1000 can also set the position of the transmitting magnetic rod 212, the position of the receiving magnetic rod 171, the matching relationship between the charging head housing 211 and the frame 12 of the electronic device 100 and the back cover 11, so that the transmitting coil 213 and the receiving coil The coupling distance of 172 is small, thereby improving the coupling coefficient between the two.

Exemplarily, the first receiving coupling surface 1714 of the receiving magnetic rod 171 is arranged as close to the frame 12 as possible, and may be in contact with the frame 12, or may form a small gap with the frame 12, for example, a gap less than or equal to 1.5 mm. At this time, when the transmitting coil 213 couples to the receiving coil 172 through the first receiving coupling surface 1714, the coupling coefficient is relatively large, so that the charging speed is relatively fast. Similarly, the second receiving coupling surface 1715 of the receiving magnet bar 171 is arranged as close to the back cover 11 as possible, for example, it contacts the back cover 11 or forms a gap less than or equal to 1.5 mm with the back cover 11, so that the transmitting coil 213 can pass through the second When the receiving coupling surface 1715 is coupled to the receiving coil 172, the coupling coefficient is relatively large, so that the charging speed is relatively fast.

It is understandable that at the charging end 21 of the charging cable 200, the first transmitting coupling surface 2124 of the transmitting magnetic rod 212 can be as close as possible to the housing end surface 2111 under the condition that the charging head housing 211 can fully protect the transmitting magnetic rod 212. The second transmitting coupling surface 2125 can be arranged as close as possible to the side surface 2112 of the housing, so that the coupling coefficient between the transmitting coil 213 and the receiving coil 172 is relatively large.

In an embodiment, please refer to FIG. 14, which is a schematic structural diagram of the wireless charging system 1000 shown in FIG. 1 in an embodiment. The outer surface of the frame 12 includes a charging area 121, the charging area 121 is a flat surface, and the housing end surface 2111 of the charging head housing 211 is a flat surface. In order to clearly show the charging area 121 in FIG. 14, the charging area 121 has been filled. When the wireless charging system 1000 is in the first charging mode, the housing end surface 2111 of the charging head housing 211 contacts the charging area 121 of the frame 12, and the coordination between the two is high. The first transmitting coupling surface 2124 of the charging cable 200 and the electronic device The distance between the first receiving coupling surfaces 1714 of 100 is small (refer to FIG. 8 in combination), so that the coupling distance between the transmitting coil 213 and the receiving coil 172 is small, so as to improve the coupling coefficient, and make the charging speed of the wireless charging system 1000 Higher.

The outer surface of the frame 12 also includes a non-charging area 122, and the non-charging area 122 is connected to the charging area 121. In one example, the non-charging area 122 is curved. At this time, the charging area 121 is recessed relative to the non-charging area 122, which is more conspicuous in appearance and can play a prompting role, so that the user can quickly connect the first charging cable 200 to the charging cable 200. The transmitting coupling surface 2124 is aligned with the first receiving coupling surface 1714 of the electronic device 100. In another example, a color difference or a different pattern is formed between the charging area 121 and the non-charging area 122, so that the charging area 121 is more conspicuous relative to the non-charging area 122, which also serves as a reminder.

As shown in FIG. 14, the outer surface of the back cover 11 includes a charging area 111, the charging area 111 is a flat surface, and the housing side surface 2112 of the charging head housing 211 is a flat surface. In FIG. 14, in order to clearly show the charging area 111, the charging area 111 has been filled. When the wireless charging system 1000 is in the second charging mode, the housing side surface 2112 of the charging head housing 211 contacts the charging area 111 of the rear cover 11, and the coordination between the two is high, so that the coupling distance between the transmitting coil 213 and the receiving coil 172 It is smaller to increase the coupling coefficient, so that the charging speed of the wireless charging system 1000 is higher.

In another embodiment, the charging area 121 of the frame 12 may also be a convex curved surface. At this time, the housing end surface 2111 of the charging head housing 211 is a concave curved surface, and the housing end surface 2111 of the charging head housing 211 and the frame 12 The charging area 121 is compatible, and the matching degree is high when the two are in contact. In this embodiment, the first receiving coupling surface 1714 may be correspondingly set as a convex arc surface, and the first transmitting coupling surface 2124 may be correspondingly set as a concave arc surface. The housing end surface 2111 of the charging head housing 211 and the charging area of the frame 12 When 121 is in contact, a small distance can be maintained between the first transmitting coupling surface 2124 and the first receiving coupling surface 1714, so that the transmitting coil 213 and the receiving coil 172 have a higher coupling coefficient.

As shown in FIG. 14, in some embodiments, the charging area 121 of the frame 12 is made of a non-ferromagnetic material (for example, austenitic stainless steel) to prevent the frame 12 from adversely affecting the coupling between the transmitting coil 213 and the receiving coil 172. This makes the charging process of the charging cable 200 to the electronic device 100 more reliable. The material of the non-charging area of the frame 12 may be the same as or different from the material of the charging area. The charging area 121 and the non-charging area 122 of the frame 12 may be integrally formed, or may be assembled to form an integral structure. Similarly, the charging area 111 of the back cover 11 also uses a non-ferromagnetic material (for example, austenitic stainless steel).

In addition, in some embodiments, the wireless charging system 1000 can further increase the coupling coefficient between the transmitting coil 213 and the receiving coil 172 by setting the materials of the transmitting magnetic rod 212, the transmitting coil 213, the receiving magnetic rod 171, and the receiving coil 172. Exemplarily, the transmitting magnetic rod 212 is made of a soft magnetic material to obtain a larger saturation magnetic induction intensity. The soft magnetic material can be, but is not limited to, ferrite, iron-based nanocrystalline alloy, iron-based amorphous alloy, permalloy and other materials. The transmitting coil 213 adopts copper wire, and the wire type can be Litz Wire to reduce the skin effect and AC loss. The material of the receiving magnet bar 171 is the same as that of the receiving magnet bar 171. The material of the receiving coil 172 is the same as that of the transmitting coil 213.

In the embodiment of the present application, when the wireless charging system 1000 is in the first charging mode and the second charging mode, the first magnetic attraction component 174 of the electronic device 100 and the second magnetic attraction component 214 of the charging end 21 of the charging cable 200 Attract each other, so that the charging end 21 can be automatically aligned to a predetermined area after being close to the electronic device 100, so that the transmitting magnet bar 212 and the receiving magnet bar 171 are accurately aligned, and the charging end 21 can be stably attached to the electronic device 100, Therefore, the reliability of the charging process of the wireless charging system 1000 is high.

In an embodiment, please refer to FIG. 15 and FIG. 16. FIG. 15 is a schematic structural diagram of a part of the structure of the wireless charging system 1000 shown in FIG. 7, and FIG. 16 is a structure of a part of the structure of the wireless charging system 1000 shown in FIG. Schematic.

The structure of the first magnetic attraction assembly 174 shown in FIGS. 15 and 16 corresponds to the structure of the first magnetic attraction assembly 174 shown in FIGS. 3 and 4. The structure of the second magnetic attraction assembly 214 shown in FIGS. 15 and 16 corresponds to the structure of the second magnetic attraction assembly 214 shown in FIGS. 5 and 6.

As shown in FIG. 15, when the wireless charging system 1000 is in the first charging mode, the two first magnetic blocks 1741 and the two third magnetic blocks 2141 are attracted to each other in a one-to-one correspondence. At this time, referring to FIGS. 14 and 15 in combination, the two first magnetic blocks 1741 and the two third magnetic blocks 2141 are attracted to each other, so that the charging end 21 is attracted to the charging area 121 of the frame 12 of the electronic device 100 , So that the transmitting magnetic rod 212 and the receiving magnetic rod 171 are accurately aligned, and the housing end surface 2111 of the charging end 21 is stably and accurately positioned to contact the charging area 121 of the frame 12, thereby ensuring the coupling effect of the transmitting coil 213 and the receiving coil 172, so that The charging process of the wireless charging system 1000 is reliable.

As shown in Figure 16, when the wireless charging system 1000 is in the second charging mode, the two first magnetic blocks 1741 and the two fourth magnetic blocks 2142 are attracted to each other in a one-to-one correspondence, and the two second magnetic blocks 1742 one The two third magnetic attraction blocks 2141 are attracted to each other in a one-to-one correspondence. At this time, referring to FIGS. 14 and 16, the two first magnetic blocks 1741 and the two fourth magnetic blocks 2142 are attracted to each other, and the two second magnetic blocks 1742 and the two third magnetic blocks 2141 are attracted to each other. , So that the charging end 21 is adsorbed on the charging area 111 of the back cover 11 of the electronic device 100, so that the transmitter magnet bar 212 and the receiver magnet bar 171 are aligned accurately, and the housing end surface 2111 of the charging end 21 is in stable and accurately positioned contact The charging area 111 of the back cover 11 ensures the coupling effect of the transmitting coil 213 and the receiving coil 172, so that the charging process of the wireless charging system 1000 is reliable.

In another embodiment, please refer to FIGS. 17 and 18 together. FIG. 17 is a schematic structural diagram of a part of the structure of the wireless charging system 1000 shown in FIG. 7 in another embodiment, and FIG. 18 is the wireless charging system shown in FIG. A schematic structural diagram of a part of the structure of the charging system 1000 in another embodiment.

The main differences between the wireless charging system 1000 in this embodiment and the wireless charging system 1000 in the foregoing embodiments are:

The first magnetic attraction assembly 174 includes two first magnetic attraction bars 1743, and the two first magnetic attraction bars 1743 are respectively arranged on two sides of the receiving magnetic bar 171. The second magnetic attraction assembly 214 includes two second magnetic attraction bars 2143, and the two second magnetic attraction bars 2143 are respectively arranged on two sides of the transmitting magnetic bar 212. In this embodiment, the extending direction of the first magnetic strip 1743 is parallel to the second direction Y, and the extending direction of the second magnetic strip 2143 is parallel to the second direction Y. As shown in FIG. 17, when the wireless charging system 1000 is in the first charging mode, the end surfaces 1743a of the two first magnetic strips 1743 and the end surfaces 2143a of the two second magnetic strips 2143 are attracted to each other. As shown in FIG. 18, when the wireless charging system 1000 is in the second charging mode, the side surfaces 1743b of the two first magnetic strips 1743 and the side surfaces 2143b of the two second magnetic strips 2143 are attracted to each other.

In other embodiments, the extending directions of the first magnetic strip 1743 and the second magnetic strip 2143 can also have other directions, and the first magnetic strip 1743 and the second magnetic strip 2143 can also have other shapes.

In other embodiments, the first magnetic attraction component 174 and the second magnetic attraction component 214 may also have other structural forms and matching relationships. For example, the first magnetic attraction component 174 and the second magnetic attraction component 214 may include a larger number or more. With a small number of magnetic blocks, the shape of the magnetic blocks can be the same as or different from those in the previous embodiment; or, the first magnetic attraction component 174 and the second magnetic attraction component 214 can include a larger number of magnetic strips. The shape may be the same as or different from the previous embodiment.

Please refer to FIG. 19. FIG. 19 is a structural diagram of the receiving magnet bar 171 and the receiving coil 172 shown in FIG. 3 in some embodiments.

In some embodiments, the charging assembly 17 of the electronic device 100 may further include an insulating layer (not shown in the figure), and the insulating layer covers the outer surface of the receiving magnet bar 171. The insulating layer can be made of insulating foam, insulating paint or insulating film. It is understandable that because the resistivity of the receiving magnetic rod 171 is very low, for example, the resistivity of the iron-based nanocrystalline alloy material is 130μΩ/cm, which is a good conductor. If the insulating protective layer on the surface of the receiving coil 172 is damaged, the receiving coil 172 will be directly If the receiving magnet bar 171 is contacted, it is easy to short-circuit through the surface of the receiving magnet bar 171. In this embodiment, the arrangement of the insulating layer can prevent the receiving coil 172 from being short-circuited through the receiving magnetic rod 171, thereby increasing the reliability of the charging assembly 17.

Wherein, the outer surface of the transmitting magnetic rod 212 may also be covered with an insulating layer to prevent the transmitting coil 213 from being short-circuited via the transmitting magnetic rod 212.

In some embodiments, as shown in FIG. 19, the charging assembly 17 of the electronic device 100 may further include a shielding cover 177, which is sleeved on the outside of the receiving coil 172, and the shielding cover 177 is used to shield the electric field generated by the receiving coil 172. At this time, the shielding cover 177 may form a Faraday cage on the outside of the receiving coil 172, thereby shielding the electric field generated by the receiving coil 172, so as to reduce the external electromagnetic interference of the receiving coil 172. The shielding cover 177 can be made of electrical shielding materials such as copper foil. Among them, the material of the shielding cover 177 adopts a material with low magnetic permeability, so that the magnetic field lines are transmitted in the receiving magnet bar 171 more.

The charging end 21 may also include a shielding cover, which is sleeved on the outside of the transmitting coil 213 for shielding the electric field generated by the transmitting coil 213.

Please refer to FIG. 20, which is a schematic structural diagram of a part of the structure of the electronic device 100 shown in FIG. 1 in another embodiment. FIG. 20 illustrates the relative positional relationship between the frame 12 of the electronic device 100 and the partial structure of the charging assembly 17.

In some embodiments, the number of receiving magnetic rods 171 of the charging assembly 17 of the electronic device 100 is at least two, and the at least two receiving magnetic rods 171 are located at different positions of the electronic device 100. Exemplarily, the frame 12 includes a first frame portion 123 and a second frame portion 124 intersecting the first frame portion 123. The first frame portion 123 may be located at the bottom or top of the electronic device 100, and the second frame portion 124 may be located on the side of the electronic device 100. The number of receiving magnet bars 171 is at least two, of which the first receiving coupling surface 1714 of one receiving magnet bar 171 faces the first frame portion 123, and the first receiving coupling surface 1714 of the other receiving magnet bar 171 faces the second frame portion 124 The number of receiving coils 172 is the same as the number of receiving magnetic rods 171, at least two receiving coils 172 are wound around at least two receiving magnetic rods 171 in a one-to-one correspondence, and all receiving coils 172 are electrically connected to the battery 16.

In this embodiment, the electronic device 100 has multiple charging positions corresponding to the multiple receiving magnetic rods 171, and the user can flexibly select the charging position according to the requirements of holding vertically or horizontally, so that it can be used in a variety of scenarios. The wireless charging experience of the electronic device 100 is better.

In some embodiments, the frame 12 may further include a third frame portion 125. The third frame portion 125 is connected to an end of the second frame portion 124 away from the first frame portion 123. The third frame portion 125 is disposed opposite to the first frame portion 123. One of the at least two receiving magnetic rods 171 of the electronic device 100 has a first receiving coupling surface 1714 facing the third frame portion 125, and one of the at least two receiving coils 172 of the electronic device 100 receives a coil 172 Wrap around the receiving magnetic rod 171.

In the foregoing embodiment, the electronic device 100 has a flat-panel structure as an example for description. In some other embodiments, the electronic device 100 may also adopt a folding structure. Please refer to FIGS. 21 to 23 together. FIG. 21 is a schematic structural diagram of the electronic device 100 of the wireless charging system 1000 shown in FIG. 1 in another embodiment, and FIG. 22 is the electronic device 100 shown in FIG. 21 at another angle. 23 is a schematic structural diagram of the electronic device 100 shown in FIG. 21 after being folded.

The main difference between the electronic device 100 of this embodiment and the electronic device 100 of the previous embodiment is that the electronic device 100 is a foldable device. Specifically, the frame 12 of the electronic device 100 includes a first frame 12a and a second frame 12b, and the electronic device 100 further includes a bending piece 130. Both sides of the bending piece 130 are connected to the first frame 12a and the second frame, respectively. The body 12b and the bending member 130 can be deformed, so that the first frame body 12a and the second frame body 12b are relatively unfolded or folded. The back cover 11 includes a first back cover 11a and a second back cover 11b. The first back cover 11a is installed on the first frame 12a, and the second back cover 11b is installed on the second frame 12b. The display screen 13 is a flexible display screen, and the display screen 13 is continuously mounted on the first frame 12a, the bending member 130, and the second frame 12b.

In some embodiments, as shown in FIGS. 21 to 23, the charging assembly 17 is located inside the first frame 12 a and between the first back cover 11 and the display screen 13. The position where the first frame body 12a faces the charging assembly 17 forms a charging area 121a, and the position where the first back cover 11 faces the charging assembly 17 forms a charging area 111a. As shown in FIGS. 21 and 22, when the first frame body 12a and the second frame body 12b are relatively unfolded, the charging area 121a of the first frame body 12a and the charging area 111a of the first back cover 11 are both exposed to the outside, thus charging The charging end 21 of the cable 200 can select any charging area to charge the electronic device 100, thereby selecting the first charging mode or the second charging mode according to requirements. As shown in FIG. 23, when the first frame 12a and the second frame 12b are relatively folded, the charging area 121a of the first frame 12a is exposed, and the charging end 21 of the charging cable 200 can be in the first frame 12a. In the charging area 121a, the electronic device 100 is charged in the first charging mode.

It is understandable that a traditional foldable electronic device with an outward-folding screen is provided with a wireless charging coil and a wired charging port, the wireless charging coil is installed on the back cover of the electronic device, and the wired charging port is installed on the frame of the electronic device. When the electronic device is in the folded state, the wireless charging coil is folded inside the fuselage, the wireless charging coil cannot touch the wireless charging base, and the electronic device cannot be wirelessly charged. It can only be performed by inserting a wired charging cable into the wired charging port. Charging or charging the electronic device after it is in a flat state, so the electronic device needs to be equipped with two charging ports at the same time, the cost is high, and the wireless charging method can only be performed when the electronic device is in the flat state, and the wireless charging experience is poor.

In the present application, if the electronic device 100 is in the folded state, the charging end 21 of the charging cable 200 can charge the electronic device 100 in the first charging mode; if the electronic device 100 is in the flat state, the charging cable 200 The charging end 21 can charge the electronic device 100 through the first charging mode or the second charging mode. Therefore, the charging method of the charging cable 200 for the electronic device 100 is diversified, and the electronic device 100 can be charged without obstacles in various states of the electronic device 100. Since the charging end 21 can be overlapped on the frame 12 of the electronic device 100 or the area of the back cover 11 close to the frame 12, the user can hold the electronic device 100 in a charged state, which is convenient for performing other operations on the electronic device 100, so that the electronic device 100 The wireless charging experience of the device 100 is better.

It is understandable that the electronic device 100 shown in FIG. 23 has an outward-folding screen structure. In other embodiments, the electronic device 100 may also have an in-screen folding structure. In this case, the charging area of the first back cover 11 is in the electronic device. The 100 remains exposed when unfolded or folded, and users can more flexibly choose the charging area and charging mode, and the wireless charging experience is better.

Please refer to FIG. 24. FIG. 24 is an exploded schematic diagram of the adapter end 22 of the charging cable 200 of the wireless charging system 1000 shown in FIG. 1.

The adapter end 22 of the charging cable 200 includes a protective shell 221, a universal serial bus (USB) male connector 222, a protective sleeve 223, a third circuit board 224, and a plurality of devices mounted on the third circuit board 224. Electronic components 225. The third circuit board 224 is electrically connected to the wires in the cable portion 23 of the charging cable 200. The universal serial bus male connector 222 is partially located inside the protective shell 221, and the protective sleeve 223, the third circuit board 224 and a plurality of electronic components 225 are located inside the protective shell 221. The universal serial bus male connector 222 is electrically connected to the third circuit board 224. The protective shell 221 may be made by injection molding. A gap is formed between the outer surface of each component located inside the protective shell 221 and the outer surface of the protective shell 221, and the protective shell 221 can fully protect and avoid problems such as wear and oxidation of its internal components.

In an embodiment, the adapter end 22 may also include a fixing glue (not shown in the figure), which is fixed to the third circuit board 224 and covers the electronic components 225 on the third circuit board 224 to Protect electronic components 225. Among them, the fixing glue can be ultraviolet curing glue or hot melt glue, and the implementation of fixing glue is not strictly limited in this application.

As shown in FIG. 24, the protective sleeve 223 is located on one side of the universal serial wiring male connector 222. The protective sleeve 223 is sleeved on the outside of the third circuit board 224 and the fixing glue to form a physical protection. Exemplarily, the reinforcing sleeve 215 may be made of high-strength materials such as steel materials and stainless steel materials.

The foregoing mainly describes the structure of the wireless charging system 1000 by examples, and in the following, the circuit and charging process of the wireless charging system 1000 will be described by examples based on the structure of the wireless charging system 1000 in the foregoing. It can be understood that the circuit and charging process described later can also be applied to other wireless charging systems 1000 with dual charging modes.

Please refer to FIG. 25, which is a schematic diagram of a charging process of the wireless charging system 1000 provided by an embodiment of the present application.

The charging process of the wireless charging system 1000 includes: high-voltage AC power enters the power adapter 300, the power adapter 300 converts the high-voltage AC power into low-voltage DC power, and the low-voltage DC power is transmitted to the charging cable after passing through the adapter end 22 and the cable part 23 of the charging cable 200 The charging end 21 of the 200 is coupled with the receiving coil 172 of the charging assembly 17 of the electronic device 100 through the transmitting coil 213, thereby transmitting the power to the charging assembly 17, and the charging assembly 17 outputs low-voltage direct current to the battery of the electronic device 100 16, so as to achieve charging.

Please refer to FIG. 26. FIG. 26 is a schematic block diagram of the hardware circuit of the power adapter 300 shown in FIG. 25.

The hardware circuit of the power adapter 300 includes a high-voltage rectifier bridge 301, a filter circuit 302, a transformer 303, a single-ended flyback power controller 304, a synchronous rectifier circuit 305, and an interface controller 306. Among them, the high-voltage rectifier bridge 301 is used to rectify high-voltage alternating current into high-voltage direct current. The high-voltage rectifier bridge 301 is used to connect to a high-voltage AC circuit. The filter circuit 302 is connected to the high-voltage rectifier bridge 301. The filter circuit 302 is used to reduce the voltage ripple of the high voltage direct current. The transformer 303 is connected to the filter circuit 302, the synchronous rectification circuit 305 is connected to the transformer 303, the interface controller 306 is connected to the synchronous rectification circuit 305, and the single-ended flyback power controller 304 is connected to the interface controller 306 and the transformer 303. The transformer 303, the synchronous rectifier circuit 305, the interface controller 306, and the single-ended flyback power supply controller 304 combine to form a single-ended flyback topology, which realizes the voltage conversion function from high-voltage direct current to low-voltage direct current. Among them, the transformer 303 is used for voltage regulation. Exemplarily, the transformer 303 can adjust the output voltage by adjusting the duty cycle of the switch. The synchronous rectification circuit 305 is used for rectification. The interface controller 306 is used to output low-voltage direct current. The interface controller 306 is also responsible for communicating with the outside (such as the adapter end 22 of the charging cable 200) to obtain voltage regulation information (boost information or buck information), and then feed it back to the single-ended flyback power controller 304, The terminal flyback power supply controller 304 adjusts the transformer 303 according to the voltage adjustment information, so that the output voltage of the transformer 303 is adjusted accordingly, thereby realizing the adjustment of the output voltage of the power adapter 300. At the same time, the interface controller 306 also has over-current and over-voltage detection functions, and can feed back to the single-ended flyback power supply controller 304 in time when the output specification of the low-voltage direct current exceeds the set range. In this embodiment, the power adapter 300 has a voltage regulation function.

Wherein, the interface controller 306 may use a power delivery protocol (power delivery, PD) or a fast charge protocol (fast charge protocol, FCP) to communicate with the outside. The interface controller 306 can use an optocoupler device to feed back the voltage adjustment information to the single-ended flyback power controller 304.

Please refer to FIG. 27, which is a schematic block diagram of the hardware circuit of the charging cable 200 shown in FIG. 25 in an embodiment.

The adapter end 22 of the charging cable 200 can be used to communicate with the interface controller 306 of the power adapter 300 and realize energy transmission. The cable part 23 of the charging cable 200 is used to transmit signals and energy. The hardware circuit of the charging end 21 of the charging cable 200 includes the aforementioned transmitting coil 213, and also includes a wireless charging transmission control chip 2171, a power switch element 2172, and a transmission matching circuit 2173. The wireless charging transmission control chip 2171, the power switch element 2172, and the transmission matching circuit 2173 are part or all of the electronic components 217 mounted on the second circuit board 216 (see FIG. 5).

The wireless charging transmission control chip 2171 is connected to the cable part 23. The wireless charging transmission control chip 2171 is used to convert direct current into alternating current, and to modulate and demodulate two-way communication data. The power switch element 2172 is connected to the wireless charging transmission control chip 2171, and the power switch element 2172 is used to output AC power with sufficient power. Exemplarily, the power switching element 2172 may be implemented by a transistor, such as a metal-oxide-semiconductor field-effect transistor (MOSFET). The transmitting matching circuit 2173 is a series resonant capacitor, and the transmitting matching circuit 2173 is used to form an LC resonance with the transmitting coil 213.

Please refer to FIG. 28. FIG. 28 is a schematic block diagram of the hardware circuit of the charging cable 200 shown in FIG. 25 in another embodiment. The main difference between this embodiment and the previous embodiments is that the hardware circuit of the adapter end 22 of the charging cable 200 includes a boost circuit 2251, and the boost circuit 2251 is electrically connected to the transmitting coil 213 via the cable part 23. The boost circuit 2251 can adjust the output voltage according to the charging requirements of the electronic device 100. The booster circuit 2251 is a part of the electronic component 217 provided on the third circuit board 224 (refer to FIG. 21). Exemplarily, the boost circuit 2251 can be implemented using the Boost architecture. The Boost architecture is a switching DC boost circuit that can convert DC power into another fixed voltage or adjustable voltage DC power, also known as a DC-DC converter .

In this embodiment, since the adapter end 22 of the charging cable 200 is provided with a boost circuit 2251, if the adapter end 22 is connected to a power adapter that does not support the voltage regulation function (for example, the old power adapter only supports 5V output, When boosting is not supported), the boosting circuit 2251 can implement a voltage regulation function, so that the transmission power of the charging cable 200 meets the requirements of multiple charging modes, so the compatibility of the charging cable 200 is better. It can be understood that the charging cable 200 of this embodiment can also be connected to a power adapter 300 with a voltage regulation function. In this scenario, the boost circuit 2251 can be bypassed.

In this embodiment, since the boost circuit 2251 is located at the adapter end 22 of the charging cable 200, the other main hardware circuits of the charging cable 200 are located at the charging end 21, that is, the boost circuit 2251 and other hardware circuits are located at the charging end 21 respectively. The two ends of the cable 200 are physically separated, so that the booster circuit 2251 that is easy to generate heat can be separated from other heat sources, so as to prevent the local temperature of the charging cable 200 from being too high. In other embodiments, the boost circuit 2251 may also be provided at the charging end 21 of the charging cable 200.

Please refer to FIG. 29. FIG. 29 is a schematic block diagram of the hardware circuit of the power management module 140 and the charging assembly 17 of the electronic device 100 shown in FIG. 25.

The hardware circuit of the charging assembly 17 includes the aforementioned receiving coil 172, and also includes a receiving matching circuit 1761, a wireless charging receiving control chip 1762, a voltage converter 1763, and a charging control chip (charger IC) 1764. The receiving matching circuit 1761, the wireless charging receiving control chip 1762, the voltage converter 1763, and the charging control chip 1764 may be part or all of the electronic components 176 (see FIG. 4) installed on the first circuit board 175. In other embodiments, the receiving and matching circuit 1761, the wireless charging receiving control chip 1762, the voltage converter 1763, and the charging control chip 1764 may also be partially mounted on the first circuit board 175 and partially mounted on the main circuit board 18.

The electronic device 100 further includes a power management module 140. Exemplarily, the power management module 140 may be one of the processing modules of the processor 19. Alternatively, the power management module 140 may also be an independent chip, such as a power management chip. In this case, the power management module 140 may be installed on the first circuit board 175 or the main circuit board 18. Alternatively, the power management module 140 can also be integrated with the wireless charging receiving control chip 1762 and/or the charging control chip 1764 into one chip.

Please refer to FIG. 30. FIG. 30 is a schematic diagram of a partial circuit of the charging assembly 17 shown in FIG. 29. The receiving matching circuit 1761 includes a first capacitor Cs and a second capacitor Cd. The first capacitor Cs is arranged in series with the receiving coil 172, and the second capacitor Cd is arranged in parallel with the series circuit of the first capacitor Cs and the receiving coil 172. Specifically, the first capacitor Cs is connected between the receiving coil 172 and the first AC port AC1 of the wireless charging receiving control chip 1762. The other end of the receiving coil 172 is connected to the second AC port AC2 of the wireless charging receiving control chip 1762. One end of the capacitor Cd is connected to the wiring between the first capacitor Cs and the first AC port AC1 of the wireless charging receiving control chip 1762, and the other end of the second capacitor Cd is connected to the second AC of the receiving coil 172 and the wireless charging receiving control chip 1762 Cable routing between ports AC2.

The first capacitor Cs and the receiving coil 172 form a low-frequency resonance for wireless energy transmission; the second capacitor Cd and the receiving coil 172 form a high-frequency resonance for the Select Phase in the protocol interaction. Exemplarily, the transmitting coil 213 and the receiving coil 172 interact through the Qi (Wireless Power Consortium) specification of the Wireless Power Consortium (WPC), and the first capacitor Cs can form a 100KHz low-frequency resonance with the receiving coil 172. The second capacitor Cd can form a high frequency resonance of 1 MHz with the receiving coil 172.

As shown in FIG. 30, the wireless charging receiving control chip 1762 is used to convert alternating current into direct current, and the direct current can be output by the output port Vout. The wireless charging receiving control chip 1762 may adopt a synchronous rectification scheme or an asynchronous rectification scheme to convert alternating current into direct current. The wireless charging receiving control chip 1762 is also used to realize the modulation and demodulation of the two-way communication data. The wireless charging receiving control chip 1762 may be an independent chip, may also be integrated in the charging control chip 1764, or may be integrated in other chips of the electronic device 100, such as the processor 19.

As shown in FIG. 29, the voltage converter 1763 is a DC-DC converter for converting the DC voltage output by the wireless charging receiving control chip 1762 to a low voltage range. Exemplarily, the 20V DC power output by the wireless receiving control chip can be converted into 5V DC power.

In an embodiment, the voltage converter 1763 may be a buck converter circuit (Buck circuit).

In another embodiment, as shown in FIG. 29, the voltage converter 1763 includes a first-stage converter 1763a and a second-stage converter 1763b connected in series, and both the first-stage converter 1763a and the second-stage converter 1763b are used to implement step-down. Exemplarily, the first-level converter 1763a and the second-level converter 1763b may use switch capacitor (SC) converters. The use of two-stage switched capacitor converter cascade can optimize the power conversion efficiency (for example, it can reach 98%), which is much higher than the step-down converter circuit.

The first-level converter 1763a is connected to the charging control chip 1764, and the second-level converter 1763b is connected to the charging control chip 1764. That is, the receiving coil 172, the receiving matching circuit 1761, the wireless charging receiving control chip 1762, the primary converter 1763a, the secondary converter 1763b, the charging control chip 1764, and the battery 16 are connected in sequence.

Wherein, when the wireless charging system 1000 is in the first charging mode, the first-stage converter 1763a is in the bypass mode, and the second-stage converter 1763b realizes the step-down. When the wireless charging system 1000 is in the second charging mode, the first-level converter 1763a implements a first-level step-down, and the second-level converter 1763b implements a second-level step-down.

In this embodiment, because the charging speed in the first charging mode is slow, the voltage converter 1763 reduces the DC voltage output by the wireless charging receiving control chip 1762 to within a predetermined range through a single step-down, while the charging in the second charging mode The speed is faster. Therefore, the voltage converter 1763 reduces the DC voltage output by the wireless charging receiving control chip 1762 to a predetermined range through continuous secondary step-down. Therefore, the voltage converter 1763 has a wide step-down range, and the electronic device 100 can be applied to Multiple charging modes.

Exemplarily, both the first-stage converter 1763a and the second-stage converter 1763b realize a 2:1 step-down ratio. When the wireless charging system 1000 is in the first charging mode, the output voltage of the wireless receiving control chip is 10V, the first-level converter 1763a is in the bypass mode, and the second-level converter 1763b realizes step-down to convert the 10V voltage to 5V. The 5V voltage is the input voltage of the charging control chip 1764. When the wireless charging system 1000 is in the second charging mode, the output voltage of the wireless receiving control chip is 20V, the first-stage converter 1763a realizes a first-stage step-down voltage to convert the 20V voltage into a 10V voltage, and the second-stage converter 1763b realizes the second stage Step-down, used to convert 10V voltage to 5V voltage.

The charging control chip 1764 is used to receive the DC power output by the voltage converter 1763, and control the output voltage and current according to a predetermined charging curve, so as to stably charge the battery 16. That is, the DC power output by the wireless charging control chip 1762 is converted to a low voltage range (for example, 5V) by the voltage converter 1763, and then the battery 16 is charged by the charging control chip 1764 (the charging voltage can be 3.6V to 4.2V) . Among them, the charging control chip 1764 is mainly for realizing the functions of constant voltage charging and constant current charging, by adjusting the output voltage in real time to ensure that the charging current (current entering the battery 16) curve meets expectations, so as to ensure the reliability of the charging process. The charging control chip 1764 is also used to collect parameters such as the voltage, current, and temperature of the battery 16.

There is two-way communication between the power management module 140 and the wireless charging control chip 1762. The power management module 140 can transmit signals to the primary converter 1763a and the secondary converter 1763b in one direction. The power management module 140 and the charging control chip 1764 are bidirectional communication. The power management module 140 has data processing and storage functions.

The power management module 140 is used to determine the charging mode of the wireless charging system 1000, monitor the capacity of the battery 16, and monitor the charging process of the wireless charging system 1000 in real time. In one embodiment, the power management module 140 judging the charging mode of the wireless charging system 1000 includes: judging whether the wireless charging system 1000 is in the first charging mode or the second charging mode according to the electrical parameters of the receiving coil 172 and/or the electrical parameters of the transmitting coil 213 Two charging mode. Among them, the wireless charging receiving control chip 1762 can collect the electrical parameters of the receiving coil 172 and then transmit them to the power management module 140. The wireless charging transmitting control chip 2171 can collect the electrical parameters of the transmitting coil 213, and then transmitting the transmitting coil 213 and the receiving coil 172 to the wireless charging receiving control chip 1762, and then transmitting the wireless charging receiving control chip 1762 to the power management module 140.

The power management module 140 stores a first charging curve corresponding to the first charging mode and a second charging curve corresponding to the second charging mode. Among them, the charging curve can include five stages, namely, trickle charge stage, pre-charge stage, constant current charge stage, constant voltage charge stage and charge cut-off stage.

Exemplarily, as shown in FIG. 31, FIG. 31 is a schematic diagram of a first charging curve provided in an embodiment of the present application. In FIG. 31, the abscissa is time, and the ordinate is the charging current, that is, the input current demand of the battery 16 and the output current demand of the charging control chip 1764. The first charging curve corresponds to the first charging mode. The charging current of the first charging curve in the trickle stage is 100 milliamperes (mA), the charging current in the pre-charging stage is 200mA, the charging current in the constant current charging stage is 2A, and the charging current in the constant voltage charging decreases with time , The charging current in the charging cut-off phase is 0. The area under the first charging curve (charging current multiplied by time) corresponds to the battery 16 capacity.

Exemplarily, as shown in FIG. 32, FIG. 32 is a schematic diagram of a second charging curve provided in an embodiment of the present application. In FIG. 32, the abscissa is time, and the ordinate is the charging current, that is, the input current demand of the battery 16 and the output current demand of the charging control chip 1764. The second charging curve corresponds to the second charging mode. The charging current of the second charging curve in the trickle stage is 100 milliamperes (mA), the charging current in the pre-charging stage is 200mA, the charging current in the constant current charging stage is 6A, and the charging current in the constant voltage charging decreases with time , The charging current in the charging cut-off phase is 0. The area under the second charging curve (charging current multiplied by time) corresponds to the battery 16 capacity.

Comparing the second charging curve with the first charging curve, it can be seen that because the charging current of the second charging curve in the constant current charging stage is higher than that of the first charging curve, the capacity of the battery 16 increases faster, so the second charging curve corresponds to the second charging curve. The charging speed of the charging mode is significantly faster than the charging speed of the first charging mode corresponding to the first charging curve.

In one embodiment, the action of the power management module 140 to monitor the charging process of the wireless charging system 1000 in real time includes: invoking the corresponding charging curve according to the charging mode, judging in real time which stage of the charging curve the capacity of the battery 16 is in, and according to the current of the corresponding stage The demand forms an input regulation signal and an output regulation signal; the primary converter 1763a and the secondary converter 1763b are controlled to bypass or open according to the charging mode. The input adjustment signal is transmitted to the wireless charging transmission control chip 2171 via the wireless charging receiving control chip 1762, and the charging cable 200 adjusts the electrical parameters of the transmitting coil 213 according to the input adjusting signal, so that the receiving power of the receiving coil 172 changes and then adjusts Wireless charging power; the output adjustment signal is transmitted to the charging control chip 1764, and the charging control chip 1764 adjusts the voltage and current of the DC power output according to the output adjustment signal. The DC power output by the charging control chip 1764 (that is, the wireless charging power) and The receiving power of the receiving coil 172 matches, so that the battery 16 is stably charged. In addition, the power management module 140 can also monitor the number of cycles of the battery 16 and the health status (leakage, impedance) of the battery 16 and other parameters.

Hereinafter, the charging process of the wireless charging system 1000 will be described as an example in conjunction with the interaction process between the transmitting coil 213 of the charging cable 200 and the receiving coil 172 of the electronic device 100. For the hardware circuit of the wireless charging system 1000, refer to FIG. 25 to FIG. 29.

Please refer to FIG. 33, which is a flowchart of a wireless charging method of a wireless charging system 1000 according to an embodiment of the present application. The wireless charging method is applied to a wireless charging system 1000 having a charging cable 200 and an electronic device 100. In the wireless charging method, the signal interaction and energy transmission between the charging cable 200 and the electronic device 100 are realized by the coupling between the receiving coil 172 and the transmitting coil 213. Among them, the wireless charging transmission control chip 2171 of the charging cable 200 and the wireless charging reception control chip 1762 of the electronic device 100 can both modulate and demodulate signals.

Wireless charging methods include:

S010: The charging cable 200 transmits an analog communication signal.

When the adapter end 22 of the charging cable 200 detects the DC voltage in the first range, the charging end 21 of the charging cable 200 transmits an analog communication signal. Among them, the first range is 4.25V to 21V. In the embodiments of the present application, the range from A to B includes endpoint A and endpoint B.

In one embodiment, when the user needs to charge, plug the power adapter 300 into the 220V power jack. At this time, since the power adapter 300 is unloaded and has not received a voltage regulation command, the power adapter 300 outputs a 5V DC voltage. 5V is in the first range. If the adapter end 22 of the charging cable 200 is plugged into the power adapter 300, the adapter end 22 can detect the DC voltage in the first range, and the hardware circuit in the charging end 21 of the charging cable 200 starts to work.

In another embodiment, when the user needs to charge, plug the charging end 21 of the charging cable 200 into a power source such as a power bank. The power source such as the power bank can also provide a DC voltage within the first range, so the adapter end 22 can The DC voltage in the first range is detected, and the hardware circuit in the charging end 21 of the charging cable 200 starts to work.

After the wireless charging transmission control chip 2171 of the hardware circuit in the charging terminal 21 completes power-on initialization, the wireless charging system 1000 enters the Select Phase. At this time, the wireless charging transmission control chip 2171 sends out analog communication through the transmission coil 213 ( analog ping) signal, analog communication signal is used to detect whether there is an object approaching. The analog communication signal is a low-power intermittent signal to reduce the standby power consumption of the charging terminal 21. Exemplarily, the transmission interval time of the analog communication signal is 500 ms, and the duration is 70 us.

S020: When the analog communication signal meets the trigger condition, the charging cable 200 transmits a digital communication signal.

When an object approaches the charging end 21 of the charging cable 200, it will affect the magnetic field formed by the transmitting coil 213, thereby affecting the current waveform of the analog communication signal transmitted in the transmitting coil 213. Therefore, the charging cable 200 can communicate through analog The current waveform change of the signal judges that an object is approaching.

Further, the charging cable 200 sets trigger conditions to reduce the probability of misjudgment. Exemplarily, the trigger condition is that the current of the analog communication signal is lower than the threshold. In other words, the charging cable 200 determines whether the current of the analog communication signal is lower than the threshold, and if so, the charging cable 200 transmits the digital communication signal.

In this embodiment, when the analog communication signal satisfies the trigger condition, the charging cable 200 can more accurately determine that there is an object approaching, and the approaching object may be the electronic device 100, and the approaching state is stable, thus starting to transmit digital communication signals to the outside. The wireless charging system 1000 enters the communication phase (Ping Phase). The digital communication signal is used to confirm whether the close object is the electronic device 100. In a wireless charging scenario, if the electronic device 100 is close to the charging end 21 of the charging cable 200, the digital communication signal emitted by the charging cable 200 can be received by the electronic device 100, that is, the charging cable 200 can transmit digital data to the electronic device 100. Communication signal. Exemplarily, the wireless charging transmission control chip 2171 may adopt a frequency shift keying (frequency shift keying, FSK) modulation method to couple the digital communication signal to the receiving coil 172 of the electronic device 100 through the transmitting coil 213 to achieve transmission.

S030: When the electronic device 100 receives the digital communication signal, it transmits a confirmation signal to the charging cable 200, and determines whether the wireless charging system 1000 is in the first charging mode or the second charging mode. In other words, the electronic device 100 determines whether a digital communication signal is received, and if so, the electronic device 100 transmits a confirmation signal to the charging cable 200, and the electronic device 100 determines whether the wireless charging system 1000 is in the first charging mode or in the second charging mode. The charging mode of the wireless charging system 1000 is the charging mode of the charging cable 200 and the charging mode of the electronic device 100.

When the electronic device 100 receives the digital communication signal, the electronic device 100 confirms that it is in a charging environment, the wireless charging receiving control chip 1762 of the electronic device 100 starts to work, and transmits a confirmation signal to the charging cable 200. Exemplarily, the confirmation signal may be a digital signal. The wireless charging receiving control chip 1762 may adopt an amplitude shift keying (ASK) modulation method to couple the confirmation signal to the transmitting coil 213 of the charging terminal 21 through the receiving coil 172, so as to realize transmission. After receiving the confirmation signal, the charging cable 200 confirms that the close object is the electronic device 100, and the charging cable 200 enters the charging preparation stage. Thereafter, the wireless charging system 1000 enters an identification and configuration phase, where the electronic device 100 confirms the charging mode of the wireless charging system 1000, that is, the charging mode of the electronic device 100 and the charging cable 200.

In the embodiment of the present application, there are multiple methods for the electronic device 100 to determine whether the wireless charging system 1000 is in the first charging mode or the second charging mode:

In an embodiment, as shown in FIG. 34, FIG. 34 is a method for the electronic device 100 to determine the charging mode of the wireless charging system 1000 according to an embodiment of the present application.

In this embodiment, the electronic device 100 can confirm the coupling coefficient between the transmitting coil 213 of the charging cable 200 and the receiving coil 172 of the electronic device 100 through the measured voltage of the transmitting coil 213 and the measuring voltage of the receiving coil 172; Comparing the coupling coefficient ranges of the two charging modes, it is determined that the wireless charging system 1000 is in the first charging mode, in the second charging mode, or in an abnormal state (that is, not in the first charging mode and not in the second charging mode).

specific:

The method for the electronic device 100 to determine whether the wireless charging system 1000 is in the first charging mode or the second charging mode includes:

S0311: The electronic device 100 transmits a charging mode detection instruction to the charging cable 200. Exemplarily, after the wireless charging receiving control chip 1762 of the electronic device 100 transmits the confirmation signal to the charging cable 200, it also transmits the charging mode detection instruction to the charging cable 200. The charging mode detection command is transmitted through the coupling between the receiving coil 172 and the transmitting coil 213.

S0312: After receiving the charging cable charging mode detection command 200, the transmit coil 213 measured voltage V _1, the transmit coil 213 and the transfer voltage V ₁ to the electronic device 100. Exemplarily, the wireless charging transmission control chip 2171 of the charging cable 200 can measure the voltage V _{1 of the} transmitting coil 213 through a digital-to-analog converter (analog to digital converter, ADC). The digital-to-analog converter is the wireless charging transmission control chip 2171. Part. _{The wireless charging transmitting control chip 2171 transmits the voltage V 1 of the} transmitting coil 213 to the wireless charging receiving control chip 1762 through the coupling of the transmitting coil 213 and the receiving coil 172.

S0313: The electronic device 100 measures the voltage V _{2 of the} receiving coil 172. After the electronic device 100 transmits the charging mode detection command to the charging cable 200, it measures the voltage V _{2 of the} receiving coil 172 after a period of time. Exemplarily, the time when the electronic device 100 measures the voltage V ₂ of the receiving coil 172 is the same or similar to the time when the charging cable 200 measures the voltage V ₁ of the transmitting coil 213, so as to improve the calculation accuracy of the coupling coefficient k in the subsequent steps.

Exemplarily, the wireless charging receiving control chip 1762 can measure the voltage V _{2 of the} receiving coil 172 through a digital-to-analog converter, which is a part of the wireless charging receiving control chip 1762.

S0314: The electronic device 100 calculates the coupling coefficient k,

L ₁ is the inductance value of the transmitting coil 213, and L ₂ is the inductance value of the receiving coil 172. Since the receiving coil 172 and the transmitting coil 213 are loosely coupled, the calculation formula of the coupling coefficient k adopts the calculation formula of the loosely coupled transformer 303. 213 transmit coil inductance value L ₁ and the receiving coil 172 inductance value L ₂ is a known value, may be stored in the electronic device 100 in the power management module 140. 213 transmit coil inductance value L ₁ and receiving coil inductance value L ₂ of 172 and the emitter 212 and receiver design bar magnet 171 associated magnetic bar.

The electronic device power management module 100 1401762 extract transmit coil voltage V 213 is ₁ and the receiver coil 172 a voltage V ₂ from the wireless charging receiver control chip, and the coil 213 of the voltage V by transmitting _a receiving coil 172 of the voltage V _2, 213 transmit coil inductance value L ₁ and a receiving coil 172 inductance value L _2, the calculated coupling coefficient k.

In other examples, different from the foregoing examples, the digital-to-analog converter of the electronic device 100 is a part of the power management module 140, and the power management module 140 directly measures the voltage V _{2 of the} receiving coil 172 through the digital-to-analog converter.

S0315: If the coupling coefficient k is within the first threshold range, the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode; if the coupling coefficient k is within the second threshold range, the electronic device 100 determines that the wireless charging system 1000 is in the first Two charging mode.

In one example, as shown in FIG. 34, the electronic device 100 first determines whether the coupling coefficient k is within the first threshold range. If so, the wireless charging system 1000 is in the first charging mode, and the electronic device 100 no longer determines the coupling coefficient k. Whether it is within the second threshold range, if not, the electronic device 100 then determines whether the coupling coefficient k is within the second threshold range. In other examples, the electronic device 100 may also first determine whether the coupling coefficient k is within the second threshold range. If so, the wireless charging system 1000 is in the second charging mode, and the electronic device 100 no longer determines whether the coupling coefficient k is within the first threshold range. If not, the electronic device 100 then determines whether the coupling coefficient k is within the first threshold range.

It can be understood that if the coupling coefficient k is neither within the first threshold range nor within the second threshold range, the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state. Exemplarily, the first threshold value range is 0.35 to 0.45, and the second threshold value range is 0.55 to 0.65. If the coupling coefficient k is in the range of 0.35 to 0.45, for example, the coupling coefficient k=0.4, the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode; if the coupling coefficient k is in the range of 0.55 to 0.65, for example, the coupling coefficient k=0.6 , The electronic device 100 determines that the wireless charging system 1000 is in the second charging mode; if the coupling coefficient k is less than 0.35, greater than 0.45 and less than 0.55, or greater than 0.65, the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state.

Exemplarily, when the overlap position between the charging end 21 of the charging cable 200 and the electronic device 100 is unqualified, for example, the first transmitting coupling surface faces the first receiving coupling surface but the area directly facing the two is insufficient, or the first transmitting coupling surface faces the first receiving coupling surface. The second transmitting coupling surface faces the second receiving coupling surface but the area directly between the two is insufficient, or the first transmitting coupling surface faces the second receiving coupling surface, or the second transmitting coupling surface faces the first receiving coupling surface, or the charging end portion There are foreign objects between 21 and the electronic device 100, and the coupling coefficient k is neither within the first threshold range nor the second threshold range, and the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state.

In another embodiment, as shown in FIG. 35, FIG. 35 is another method for the electronic device 100 to determine the charging mode of the wireless charging system 1000 according to an embodiment of the present application.

In this embodiment, the electronic device 100 can confirm the coupling coefficient between the transmitting coil 213 of the charging cable 200 and the receiving coil 172 of the electronic device 100 through the preset voltage of the transmitting coil 213 and the measured voltage of the receiving coil 172; Comparing with the coupling coefficient ranges of the two charging modes, it is determined that the wireless charging system 1000 is in the first charging mode, in the second charging mode, or in an abnormal state (that is, not in the first charging mode and not in the second charging mode).

specific:

S0321: The electronic device 100 transmits a charging mode detection instruction to the charging cable 200. Exemplarily, after the wireless charging receiving control chip 1762 of the electronic device 100 transmits the confirmation signal to the charging cable 200, it also transmits the charging mode detection instruction to the charging cable 200. The charging mode detection command is transmitted through the coupling between the receiving coil 172 and the transmitting coil 213.

S0322: After the charging cable 200 receives the charging mode detection instruction, it sets the voltage of the transmitting coil 213 to the preset voltage V. The wireless charging transmission control chip 2171 of the charging cable 200 receives and demodulates the charging mode detection instruction, and adjusts the voltage of the transmitting coil 213 to the preset voltage V by controlling the voltage of the output current.

S0323: The electronic device 100 measures the measured voltage V'of the receiving coil 172. After the electronic device 100 transmits the charging mode detection command to the charging cable 200, it measures the measured voltage V'of the receiving coil 172 after a period of time (pre-set) to improve the calculation accuracy of the coupling coefficient k in the subsequent steps. Exemplarily, the wireless charging receiving control chip 1762 can measure the voltage V'of the receiving coil 172 through a digital-to-analog converter, which is a part of the wireless charging receiving control chip 1762.

S0324: The electronic device 100 calculates the coupling coefficient k,

L ₁ is the inductance value of the transmitting coil 213, and L ₂ is the inductance value of the receiving coil 172. Since the receiving coil 172 and the transmitting coil 213 are loosely coupled, the calculation formula of the coupling coefficient k adopts the calculation formula of the loosely coupled transformer 303. The preset voltage V of the transmitting coil 213, the inductance value L _{1 of the} transmitting coil 213, and the inductance value L ₂ of the receiving coil 172 are known values and can be stored in the power management module 140 of the electronic device 100. 213 transmit coil inductance value L ₁ and receiving coil inductance value L ₂ of 172 and the emitter 212 and receiver design bar magnet 171 associated magnetic bar.

The power management module 140 of the electronic device 100 obtains the measured voltage V'of the receiving coil 172 from the wireless charging receiving control chip 1762, and then passes the preset voltage V of the transmitting coil 213, the measured voltage V'of the receiving coil 172, and the inductance of the transmitting coil 213. The value L ₁ and the inductance value L _{2 of the} receiving coil 172 are calculated, and the coupling coefficient k is calculated. Compared with the foregoing embodiments, this embodiment reduces the signal interaction process between the primary charging cable 200 and the electronic device 100.

In other examples, different from the foregoing examples, the digital-to-analog converter of the electronic device 100 is a part of the power management module 140, and the power management module 140 directly obtains the measured voltage V'of the receiving coil 172 through the digital-to-analog converter.

S0325: If the coupling coefficient k is within the first threshold range, the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode; if the coupling coefficient k is within the second threshold range, the electronic device 100 determines that the wireless charging system 1000 is in the first threshold range. Two charging mode.

In one example, as shown in FIG. 33, the electronic device 100 first determines whether the coupling coefficient k is within the first threshold range. If so, the wireless charging system 1000 is in the first charging mode, and the electronic device 100 no longer determines the coupling coefficient k. Whether it is within the second threshold range, if not, the electronic device 100 then determines whether the coupling coefficient k is within the second threshold range. In other examples, the electronic device 100 may also first determine whether the coupling coefficient k is within the second threshold range. If so, the wireless charging system 1000 is in the second charging mode, and the electronic device 100 no longer determines whether the coupling coefficient k is within the first threshold range. If not, the electronic device 100 then determines whether the coupling coefficient k is within the first threshold range.

It can be understood that if the coupling coefficient is neither within the first threshold range nor within the second threshold range, the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state. Exemplarily, the first threshold value range is 0.35 to 0.45, and the second threshold value range is 0.55 to 0.65. If the coupling coefficient k is in the range of 0.35 to 0.45, for example, the coupling coefficient k=0.4, the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode; if the coupling coefficient k is in the range of 0.55 to 0.65, for example, the coupling coefficient k=0.6 , The electronic device 100 determines that the wireless charging system 1000 is in the second charging mode; if the coupling coefficient k is less than 0.35, greater than 0.45 and less than 0.55, or greater than 0.65, the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state.

In another embodiment, as shown in FIG. 36, FIG. 36 is another method for the electronic device 100 to determine the charging mode of the wireless charging system 1000 according to an embodiment of the present application.

In the wireless charging system 1000, the coupling area between the transmitting magnetic rod 212 of the charging cable 200 and the receiving magnetic rod 171 of the electronic device 100 has different values in different charging modes, and the coupling area affects the transmission of the charging cable 200 The inductance value of the coil 213, therefore, in this embodiment, by measuring the inductance value of the transmitting coil 213, it can be determined that the wireless charging system 1000 is in the first charging mode, in the second charging mode, or in an abnormal state (that is, not in the first charging mode and not in the first charging mode). In the second charging mode).

specific:

S0331: The electronic device 100 transmits a charging mode detection instruction to the charging cable 200. Exemplarily, after the wireless charging receiving control chip 1762 of the electronic device 100 transmits the confirmation signal to the charging cable 200, it also transmits the charging mode detection instruction to the charging cable 200. The charging mode detection command is transmitted through the coupling between the receiving coil 172 and the transmitting coil 213.

S0332: After receiving the charging mode detection instruction, the charging cable 200 detects the inductance value of the transmitting coil 213 and transmits the inductance value to the electronic device 100.

The method for the charging cable 200 to detect the inductance value of the transmitting coil 213 includes:

S03321: The charging cable 200 detects the resonant frequency f of the transmitting coil 213. Among them, the resonant frequency f is the resonant frequency of the LC circuit (L is the transmitting coil 213, and C is the capacitor of the transmitting matching circuit 2173). The wireless charging transmission control chip 2171 of the charging cable 200 can detect the resonance frequency f of the transmission coil 213.

Please refer to FIG. 37. FIG. 37 is a schematic diagram of a method for detecting the resonant frequency of the transmitting coil 213. The wireless charging transmission control chip 2171 detects the resonance frequency f of the transmitting coil 213 by giving a short pulse excitation to the LC loop, and then measuring the period T of the residual vibration voltage waveform, which is obtained by the formula f=1/T.

S03322: The charging cable 200 calculates the inductance L of the transmitting coil 213. Among them, the wireless charging transmission control chip 2171 of the charging cable 200 can pass the formula

Calculate the inductance value L. Among them, the resonant capacitor C is the capacitance of the transmission matching circuit 2173, and the resonant capacitor C is a known value and can be stored in the wireless charging transmission control chip 2171.

S0333: If the inductance value L is within the first inductance range, the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode; if the inductance value L is within the second inductance range, the electronic device 100 determines that the wireless charging system 1000 is in the first inductance range. Two charging mode.

In this embodiment, the charging cable 200 detects the inductance value of the transmitting coil 213 and transmits the inductance value to the electronic device 100. The power management module 140 of the electronic device 100 determines whether the inductance value is within the first inductance range or the second inductance range. , Thereby determining the charging mode of the wireless charging system 1000.

In an example, as shown in FIG. 36, the electronic device 100 first determines whether the inductance value L is within the first inductance range. If so, the wireless charging system 1000 is in the first charging mode, and the electronic device 100 no longer determines whether the inductance value L is in the first charging mode. If it is not within the second inductance range, the electronic device 100 then determines whether the inductance value L is within the second inductance range. In other examples, the electronic device 100 may also first determine whether the inductance value L is within the second inductance range. If so, the wireless charging system 1000 is in the second charging mode, and the electronic device 100 no longer determines whether the inductance value L is within the first inductance range. If not, the electronic device 100 then determines whether the inductance value L is within the first inductance range.

It can be understood that if the inductance value L is neither in the first inductance range nor in the second inductance range, the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state. Exemplarily, under the condition that the resonant capacitor C is 222 nanofarads (nF), the resonant frequency f is 114KHz in the first charging mode and 100KHz in the second charging mode, and the inductance value L is calculated correspondingly in the first charging mode. It is 8.8uH in the mode and 11.4uH in the second charging mode. Since the inductance value L changes significantly in the two charging modes, the wireless charging can be accurately determined by setting the first inductance range (for example, 8.3uH to 9.3uH) and the second inductance range (for example, 10.9uH to 11.9uH). The charging mode of the system 1000.

Exemplarily, when the overlap position between the charging end 21 of the charging cable 200 and the electronic device 100 is unqualified, for example, the first transmitting coupling surface faces the first receiving coupling surface but the area directly facing the two is insufficient, or the first transmitting coupling surface faces the first receiving coupling surface. The second transmitting coupling surface faces the second receiving coupling surface but the area directly between the two is insufficient, or the first transmitting coupling surface faces the second receiving coupling surface, or the second transmitting coupling surface faces the first receiving coupling surface, or the charging end portion There are foreign objects between 21 and the electronic device 100, and the inductance value L is neither in the first inductance range nor in the second inductance range, and the electronic device 100 determines that the wireless charging system 1000 is in an abnormal charging state.

In other embodiments, after the charging cable 200 receives the charging mode detection instruction, it can also detect the LC resonance frequency of the transmitting coil 213 and transmit it to the electronic device 100. The power management module 140 of the electronic device 100 calculates the transmitting coil 213 according to the formula. Then compare whether the inductance value is within the first inductance range or the second inductance range.

Refer to Figure 33, the wireless charging method also includes:

S041: If the wireless charging system 1000 is in the first charging mode, the electronic device 100 bypasses the primary converter 1763a, turns on the secondary converter 1763b, and calls the first charging curve; if the wireless charging system 1000 is in the second charging mode, The electronic device 100 turns on the primary converter 1763a and the secondary converter 1763b, and calls the second charging curve.

Referring to FIG. 29, when the power management module 140 of the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode, since the wireless charging power of the charging cable 200 to the electronic device 100 in the first charging mode is small, the electronic device The DC voltage output by the wireless charging receiving control chip 1762 of 100 is relatively low, so the voltage converter 1763 adopts a first-stage step-down method (that is, bypassing the first-stage converter 1763a and turning on the second-stage converter 1763b) to receive wireless charging The DC voltage output by the control chip 1762 is converted into the receiving range of the charging control chip 1764. When the power management module 140 of the electronic device 100 determines that the wireless charging system 1000 is in the second charging mode, since the wireless charging power of the charging cable 200 to the electronic device 100 in the second charging mode is relatively large, the wireless charging reception control of the electronic device 100 is The DC voltage output by the chip 1762 is relatively high, so the voltage converter 1763 adopts a two-stage step-down method (that is, the first-stage converter 1763a and the second-stage converter 1763b are turned on) to convert the DC voltage output by the wireless charging receiving control chip 1762 Within the receiving range of the charging control chip 1764.

When the power management module 140 of the electronic device 100 determines that the wireless charging system 1000 is in the first charging mode, the power management module 140 obtains the current capacity of the battery 16 through the charging control chip 1764, and the power management module 140 also calls the first charging curve and determines The current capacity of the battery 16 is in the charging stage of the first charging curve, and the input regulation signal and the output regulation signal are formed according to the current demand in the charging stage. The power management module 140 transmits the input adjustment signal to the wireless charging receiving control chip 1762, so as to transmit the adjustment requirement to the charging cable 200 through the interaction between the transmitting coil 213 and the receiving coil 172. The power management module 140 transmits the output adjustment signal to the charging control chip 1764, and the charging control chip 1764 controls the output voltage and current according to the output adjustment signal.

When the power management module 140 of the electronic device 100 determines that the wireless charging system 1000 is in the second charging mode, the power management module 140 obtains the current capacity of the battery 16 through the charging control chip 1764, and the power management module 140 also calls the second charging curve and determines The current capacity of the battery 16 is in the charging stage of the second charging curve, and the input regulation signal and the output regulation signal are formed according to the current demand in the charging stage. The power management module 140 transmits the input adjustment signal to the wireless charging receiving control chip 1762, so as to transmit the adjustment requirement to the charging cable 200 through the interaction between the transmitting coil 213 and the receiving coil 172. The power management module 140 transmits the output adjustment signal to the charging control chip 1764, and the charging control chip 1764 controls the output voltage and current according to the output adjustment signal.

Refer to Figure 33, the wireless charging method also includes:

S042: If the wireless charging system 1000 is in the first charging mode, the electronic device 100 transmits the first adjustment signal to the charging cable 200, and the charging cable 200 adjusts the electrical parameters of the transmitting coil 213 according to the first adjustment signal, so as to control the electronic device 100 Perform normal charging; if the wireless charging system 1000 is in the second charging mode, the electronic device 100 transmits a second adjustment signal to the charging cable 200, and the charging cable 200 adjusts the electrical parameters of the transmitting coil 213 according to the second adjustment signal to control the electronic The device 100 performs fast charging.

In this embodiment, the charging cable 200 can dynamically adjust the electrical parameters of the transmitting coil 213 according to the adjustment signal transmitted by the electronic device 100, so that in the corresponding charging mode, the receiving power of the receiving coil 172 is adjusted to adjust the wireless charging power. To the required power, thereby stably transmitting energy to the electronic device 100, so that the reliability of the charging process of the wireless charging system 1000 is high.

Among them, the wireless charging receiving control chip 1762 of the electronic device 100 can modulate the first adjustment signal or the second adjustment signal according to the input adjustment signal transmitted by the power management module 140, and adopts the amplitude shift keying modulation method to convert the first adjustment signal or The second adjustment signal is coupled to the transmitting coil 213 of the charging terminal 21 through the receiving coil 172, so as to realize transmission. The wireless charging transmission control chip 2171 of the charging terminal 21 can demodulate the first adjustment signal or the second adjustment signal to obtain adjustment information, and then adjust the electrical parameters of the transmitting coil 213 according to the adjustment information, thereby adjusting the receiving power and the receiving power of the receiving coil 172. The wireless charging power of the wireless charging system 1000 meets the charging power demand of the current charging mode.

In this embodiment, there may be multiple adjustment schemes for wireless charging power, and the following examples are used for description:

In an embodiment, the wireless charging power adjustment can be achieved through a fixed-frequency and voltage-regulating solution. That is, the frequency of the alternating current in the transmitting coil 213 is fixed, and the voltage of the alternating current in the transmitting coil 213 is adjusted. Specifically, the first adjustment signal and the second adjustment signal are voltage adjustment signals, and the adjustment information obtained after the wireless charging transmission control chip 2171 demodulates the first adjustment signal or the second adjustment signal is voltage adjustment information. Among them, the adjustment signal can carry a signal that increases or decreases to a certain required voltage. Exemplarily, the frequency of the transmitting coil 213 may be, but not limited to, 127.7 KHz, and the required voltage may be, but not limited to, 5V, 7V, 9V, 12V, 15V, or 20V.

In an example, please refer to FIG. 26 and FIG. 27 together. The power adapter 300 has a voltage regulation function. After the wireless charging transmission control chip 2171 forms the voltage regulation information, it transmits the voltage regulation information to the interface controller 306 of the power adapter 300 through the cable part 23 and the adapter end 22, and the interface controller 306 feeds the voltage regulation information back to the single-ended The single-ended flyback power controller 304 controls the transformer 303 according to the voltage regulation information, so that the voltage of the low-voltage direct current output by the power adapter 300 is adjusted to the required voltage. The low-voltage direct current with the required voltage passes through the adapter end 22 and the line The cable part 23 is transmitted to the wireless charging transmission control chip 2171 of the charging terminal 21. The wireless charging transmission control chip 2171 converts the low-voltage direct current with the required voltage into alternating current, so that the voltage of the alternating current on the transmitting coil 213 of the charging cable 200 changes , So as to realize the adjustment of wireless charging power.

In another example, referring to FIG. 28, the power adapter 300 does not have a voltage regulation function, and the adapter end 22 of the charging cable 200 has a boost circuit 2251. After the wireless charging transmission control chip 2171 forms the voltage regulation information, it transmits the voltage regulation information to the boost circuit 2251 of the adapter end 22 through the cable part 23. The boost circuit 2251 adjusts the low-voltage direct current output by the power adapter 300 according to the voltage regulation information. When the required voltage is reached, it is transmitted to the wireless charging transmission control chip 2171 through the cable part 23. The wireless charging transmission control chip 2171 converts the low-voltage direct current with the required voltage into alternating current, so that the voltage of the alternating current on the transmitting coil 213 of the charging cable 200 is Change occurs, so as to realize the adjustment of wireless charging power.

In another embodiment, wireless charging power adjustment can be achieved through a constant voltage and frequency modulation scheme. That is, the voltage of the alternating current in the transmitting coil 213 is fixed, and the frequency of the alternating current in the transmitting coil 213 is adjusted. Specifically, the first adjustment signal and the second adjustment signal are frequency modulation signals, and the adjustment information obtained by the wireless charging transmission control chip 2171 after demodulating the first adjustment signal or the second adjustment signal is the frequency modulation information. Among them, the FM signal can carry a signal that increases or decreases to a certain required frequency. After the wireless charging transmission control chip 2171 obtains the frequency modulation information, it can directly adjust the frequency of the alternating current output by the frequency modulation information to adjust the frequency of the alternating current on the transmitting coil 213, thereby realizing the adjustment of the wireless charging power.

In another embodiment, the wireless charging power adjustment can be achieved by adjusting the duty cycle. Specifically, the first adjustment signal and the second adjustment signal are duty cycle adjustment signals, and the adjustment information obtained after the wireless charging transmission control chip 2171 demodulates the first adjustment signal or the second adjustment signal is the duty cycle adjustment information. Among them, the duty cycle adjustment signal can carry a signal that increases or decreases to a certain required duty cycle information. After the wireless charging transmission control chip 2171 obtains the duty cycle adjustment information, it can directly adjust the duty cycle of its output AC power according to the duty cycle adjustment information to adjust the duty cycle of the AC power on the transmitting coil 213, thereby realizing wireless charging power The adjustment.

Please refer to FIG. 33, FIG. 38, and FIG. 39 together. FIG. 38 is an exemplary interface diagram of the electronic device 100 in the first charging mode, and FIG. 39 is an exemplary interface diagram of the electronic device 100 in the second charging mode. .

Wireless charging methods also include:

S043: If the wireless charging system 1000 is in the first charging mode, the electronic device 100 displays a normal charging icon (as shown in FIG. 38); if the wireless charging system 1000 is in the second charging mode, the electronic device 100 displays a fast charging icon (such as Shown in Figure 39).

In this embodiment, the electronic device 100 displays different charging icons to remind the user which charging power state the electronic device 100 is in at this time, so as to prevent the user from being confused and causing confusion (for example, when fast charging is required, entering normal charging by mistake) Mode), which further improves the user's wireless charging experience.

In addition, if the electronic device 100 is in the first charging mode or the second charging mode, the electronic device 100 displays the current power level. At this time, the user can clearly understand the current power level of the battery 16 of the electronic device 100 to facilitate making more reasonable arrangements.

Please refer to FIG. 40, which is a schematic diagram of an exemplary interface of the electronic device 100 in an abnormal charging state.

Wireless charging methods also include:

S044: If the wireless charging system 1000 is not in the first charging mode or the second charging mode, the electronic device 100 displays an abnormal charging icon. In other words, if the wireless charging system 1000 is in an abnormal charging state, the electronic device 100 displays an abnormal charging icon. Exemplarily, if the charging cable 200 and the electronic device 100 are not aligned correctly, or there are foreign objects between the two, the wireless charging system 1000 is prone to abnormal charging states.

In this embodiment, the electronic device 100 can promptly remind the user that the current charging state is abnormal, prompting the user to check whether the connection relationship between the charging cable 200 and the electronic device 100 is accurate and reliable, thereby ensuring the smooth progress of the wireless charging process.

In other embodiments, the electronic device 100 may also prompt the user of the charging mode of the wireless charging system 1000 by means of a prompt sound. Exemplary: if the wireless charging system 1000 is in the first charging mode, the electronic device 100 emits a short tone prompt, such as "di"; if the wireless charging system 1000 is in the second charging mode, the electronic device 100 emits a long tone prompt, such as "Di--"; if the wireless charging system 1000 is not in the first charging mode or the second charging mode, the electronic device 100 emits multiple continuous short tone prompts, such as "di-di-di".

The various embodiments of the present application can be combined arbitrarily to achieve different technical effects. In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in this application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state hard disk).

A person of ordinary skill in the art can understand that all or part of the process in the above-mentioned embodiment method can be realized. The process can be completed by a computer program instructing relevant hardware. The program can be stored in a computer readable storage medium. , May include the processes of the foregoing method embodiments. The aforementioned storage media include: ROM or random storage RAM, magnetic disks or optical disks and other media that can store program codes.

The above are only specific examples of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and they should all cover Within the protection scope of the present application; the embodiments of the present application and the features in the embodiments can be combined with each other if there is no conflict. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A wireless charging system, characterized in that it includes electronic equipment and a charging cable;

The electronic device includes a back cover, a frame, a receiving magnet, a receiving coil, and a battery. The frame is circumferentially connected to the periphery of the back cover, the receiving magnet is located inside the frame, and the receiving magnet includes a first A receiving coupling surface and a second receiving coupling surface intersecting the first receiving coupling surface, the area of the second receiving coupling surface is larger than the area of the first receiving coupling surface, and the first receiving coupling surface faces the The frame is arranged, the second receiving coupling surface is arranged facing the back cover, the receiving coil is wound around the middle of the receiving magnet bar, and the battery is located inside the frame and electrically connected to the receiving coil;

The charging cable includes a charging head housing, a transmitting magnet bar, and a transmitting coil. The charging head housing includes a housing end surface and a housing side surface connected to the periphery of the housing end surface. The transmitting magnet bar is located inside the charging head housing, so The transmitting magnet bar includes a first transmitting coupling surface and a second transmitting coupling surface intersecting the first transmitting coupling surface. The area of the second transmitting coupling surface is larger than the area of the first transmitting coupling surface. A transmitting coupling surface faces the end surface of the housing, the second transmitting coupling surface faces the side surface of the housing, and the transmitting coil is wound around the middle of the transmitting magnetic rod;

When the wireless charging system is in the first charging mode, the end surface of the housing is in contact with the frame, the first transmitting coupling surface is facing the first receiving coupling surface, and the transmitting coil is coupled with the receiving coil. The coupling coefficient is the first coupling coefficient;

When the wireless charging system is in the second charging mode, the side surface of the housing contacts the back cover, the second transmitting coupling surface is facing the second receiving coupling surface, and the transmitting coil is coupled with the receiving coil And the coupling coefficient is a second coupling coefficient, and the second coupling coefficient is greater than the first coupling coefficient.
The wireless charging system according to claim 1, wherein the electronic device further comprises an insulating layer, the insulating layer covering the outer surface of the receiving magnet bar.
The wireless charging system according to claim 1, wherein the electronic device further comprises a shielding cover, the shielding cover is sleeved on the outside of the receiving coil, and the shielding cover is used to shield the receiving coil from generating Electric field.
The wireless charging system according to any one of claims 1 to 3, wherein the electronic device further comprises a first magnetic attraction component, and the first magnetic attraction component is located inside the frame and arranged in all areas. The periphery of the receiving magnetic rod;

The charging cable further includes a second magnetic attraction component, which is located inside the charging head housing and arranged on the periphery of the transmitting magnet rod;

When the wireless charging system is in the first charging mode and the second charging mode, the first magnetic attraction component and the second magnetic attraction component attract each other.
The wireless charging system according to claim 4, wherein the first magnetic attraction assembly includes two first magnetic attraction blocks and two second magnetic attraction blocks, and the two first magnetic attraction blocks are arranged separately Are arranged on both sides of the receiving magnetic rod, the two second magnetic attraction blocks are respectively arranged on both sides of the receiving magnetic rod, and the first magnetic attraction block is located between the frame and the second magnetic rod. Between the suction blocks;

The second magnetic attraction assembly includes two third magnetic attraction blocks and two fourth magnetic attraction blocks. The two third magnetic attraction blocks are respectively arranged on both sides of the emitting magnet bar, and the two The fourth magnetic attraction blocks are respectively arranged on both sides of the transmitting magnetic rod, and the third magnetic attraction block is located between the end surface of the housing and the fourth magnetic attraction block;

When the wireless charging system is in the first charging mode, the two first magnetic blocks and the two third magnetic blocks are attracted to each other in a one-to-one correspondence;

When the wireless charging system is in the second charging mode, the two first magnetic blocks are in a one-to-one correspondence with the two fourth magnetic blocks to attract each other, and the two second magnetic blocks are in a one-to-one correspondence. The ground and the two third magnetic attraction blocks attract each other.
The wireless charging system according to any one of claims 1 to 3, wherein the frame includes a first frame portion and a second frame portion intersecting the first frame portion;

The number of the receiving magnetic rods is at least two, of which the first receiving coupling surface of one of the receiving magnetic rods faces the first frame portion, and the other of the receiving magnetic rods has the first receiving coupling surface Facing the second frame;

The number of the receiving coils is the same as the number of the receiving magnetic rods, at least two of the receiving coils are wound around the at least two receiving magnetic rods in a one-to-one correspondence, and all the receiving coils are electrically connected to the battery .
The wireless charging system according to any one of claims 1 to 3, wherein the electronic device further comprises a receiving matching circuit, a wireless charging receiving control chip, a primary converter, a secondary converter, and a charging control chip , The receiving coil, the receiving matching circuit, the wireless charging receiving control chip, the primary converter, the secondary converter, the charging control chip, and the battery are connected in sequence;

When the wireless charging system is in the first charging mode, the first-stage converter is in bypass mode, and the second-stage converter realizes step-down; when the wireless charging system is in the second charging mode, the first-stage converter is The two-stage converter realizes one-stage voltage reduction, and the two-stage converter realizes two-stage voltage reduction.
The wireless charging system according to any one of claims 1 to 3, wherein the charging cable includes a charging end, a cable portion, and an adapter end that are connected in sequence, and the charging end includes the The charging head housing, the transmitting magnetic rod and the transmitting coil, the adapter end includes a boosting circuit, and the boosting circuit is electrically connected to the transmitting coil via the cable part.
An electronic device, comprising a frame, a back cover, a receiving magnet, a receiving coil, and a battery, the frame is circumferentially connected to the periphery of the back cover, the receiving magnet is located inside the frame, and The receiving magnet bar includes a first receiving coupling surface and a second receiving coupling surface that intersects the first receiving coupling surface. The area of the second receiving coupling surface is larger than the area of the first receiving coupling surface. A receiving coupling surface is disposed facing the frame, the second receiving coupling surface is disposed facing the back cover, the receiving coil is wound around the middle of the receiving magnet, and the battery is located inside the frame and is electrically connected to the frame. The receiving coil;

The receiving coil is used to couple with the transmitting coil of the charging cable via the first receiving coupling surface in the first charging mode, and the coupling coefficient is the first coupling coefficient;

The receiving coil is also used to couple with the transmitting coil of the charging cable via the second receiving coupling surface and the coupling coefficient is a second coupling coefficient in the second charging mode, and the second coupling coefficient is greater than the first coupling coefficient. A coupling coefficient.
The electronic device according to claim 9, wherein the electronic device further comprises a first magnetic attraction component, the first magnetic attraction component is located inside the frame and arranged around the receiving magnet bar, so The first magnetic attraction component is used to attract each other with the second magnetic attraction component of the charging cable in the first charging mode and the second charging mode.
The electronic device according to claim 9 or 10, wherein the frame includes a first frame portion and a second frame portion intersecting the first frame portion;

The number of the receiving magnetic rods is at least two, of which the first receiving coupling surface of one of the receiving magnetic rods faces the first frame portion, and the other of the receiving magnetic rods has the first receiving coupling surface Facing the second frame;

The number of the receiving coils is the same as the number of the receiving magnetic rods, at least two of the receiving coils are wound around the at least two receiving magnetic rods in a one-to-one correspondence, and all the receiving coils are electrically connected to the battery .
The electronic device according to claim 9 or 10, wherein the electronic device further comprises a receiving matching circuit, a wireless charging receiving control chip, a primary converter, a secondary converter, and a charging control chip, the receiving coil , The receiving matching circuit, the wireless charging receiving control chip, the primary converter, the secondary converter, the charging control chip, and the battery are connected in sequence;

When the electronic device is in the first charging mode, the first-stage converter is in bypass mode, and the second-stage converter realizes step-down; when the electronic device is in the second charging mode, the first-stage converter realizes One-stage step-down, the two-stage converter realizes two-stage step-down.
A charging cable, characterized in that it comprises a charging head housing, a transmitting magnetic rod and a transmitting coil. The charging head housing includes an end surface of the housing and a side surface of the housing connected to the periphery of the end surface of the housing. The transmitting magnetic rod is located at the Inside the charging head housing, the transmitting magnet bar includes a first transmitting coupling surface and a second transmitting coupling surface intersecting the first transmitting coupling surface, and the area of the second transmitting coupling surface is larger than that of the first transmitting coupling surface. The area of the surface, the first transmitting coupling surface faces the end surface of the housing, the second transmitting coupling surface faces the side surface of the housing, and the transmitting coil is wound around the middle of the transmitting magnet rod;

The transmitting coil is used to couple with the receiving coil of the electronic device via the first transmitting coupling surface in the first charging mode, and the coupling coefficient is the first coupling coefficient;

The transmitting coil is also used to couple with the receiving coil of the electronic device through the second transmitting coupling surface in the second charging mode, and the coupling coefficient is a second coupling coefficient, and the second coupling coefficient is greater than the first coupling coefficient. Coupling coefficient.
The charging cable according to claim 13, wherein the charging cable further comprises a second magnetic attraction component, and the second magnetic attraction component is located inside the charging head housing and arranged on the transmitter. The periphery of the magnetic rod; the second magnetic attraction component is used to attract each other with the first magnetic attraction component of the electronic device in the first charging mode and the second charging mode.
The charging cable according to claim 13 or 14, wherein the charging cable includes a charging end, a cable, and an adapter end that are connected in sequence, and the charging end includes the charging head housing, For the transmitting magnet and the transmitting coil, the adapter end includes a boosting circuit, and the boosting circuit is electrically connected to the transmitting coil via the cable part.
A wireless charging method for electronic equipment, characterized in that, the wireless charging method includes:

The electronic device receives the digital communication signal emitted by the charging cable and responds to the confirmation signal;

The electronic device judges whether it is in the first charging mode or the second charging mode;

If the electronic device is in the first charging mode, the electronic device transmits a first adjustment signal to the charging cable, so that the charging cable adjusts the electrical parameters of the transmitting coil according to the first adjustment signal and then The electronic device performs ordinary charging;

If the electronic device is in the second charging mode, the electronic device transmits a second adjustment signal to the charging cable, so that the charging cable adjusts the electrical parameters of the transmitting coil according to the second adjustment signal and then The electronic device performs fast charging.
The wireless charging method according to claim 16, wherein the method for the electronic device to determine whether it is in the first charging mode or the second charging mode comprises:

Transmitting, by the electronic device, a charging mode detection instruction to the charging cable;

The electronic device receives the voltage V 1 of the transmitting coil transmitted by the charging cable;

The electronic device measures the voltage V 2 of the receiving coil;

The electronic device calculates the coupling coefficient k, where,
L 1 is the inductance value of the transmitting coil, and L 2 is the inductance value of the receiving coil;

If the coupling coefficient k is within the first threshold range, the electronic device is in the first charging mode;

If the coupling coefficient k is within the second threshold range, the electronic device is in the second charging mode.
The wireless charging method according to claim 16, wherein the method for the electronic device to determine whether it is in the first charging mode or the second charging mode comprises:

Transmitting, by the electronic device, a charging mode detection instruction to the charging cable;

The electronic device measures the measured voltage V'of the receiving coil;

The electronic device calculates the coupling coefficient k, where,
V is the preset voltage V of the transmitting coil of the charging cable, L 1 is the inductance value of the transmitting coil, and L 2 is the inductance value of the receiving coil;

If the coupling coefficient k is within the first threshold range, the electronic device is in the first charging mode;

If the coupling coefficient k is within the second threshold range, the electronic device is in the second charging mode.
The wireless charging method according to claim 16, wherein the method for the electronic device to determine whether it is in the first charging mode or the second charging mode comprises:

Transmitting, by the electronic device, a charging mode detection instruction to the charging cable;

The electronic device receives the inductance value of the transmitting coil transmitted by the charging cable;

If the inductance value is within the first inductance range, the electronic device is in the first charging mode;

If the inductance value is within the second inductance range, the electronic device is in the second charging mode.
The wireless charging method according to any one of claims 16 to 19, wherein the wireless charging method further comprises:

If the electronic device is in the first charging mode, the electronic device bypasses the primary converter, turns on the secondary converter, and calls the first charging curve;

If the electronic device is in the second charging mode, the electronic device turns on the primary converter and the secondary converter, and calls the second charging curve.
The wireless charging method according to any one of claims 16 to 19, wherein the wireless charging method further comprises:

If the electronic device is in the first charging mode, the electronic device displays a normal charging icon;

If the electronic device is in the second charging mode, the electronic device displays a fast charging icon.
A chip applied to an electronic device, wherein the chip includes: one or more processors and one or more interfaces; the interface is used to receive code instructions and transmit the code instructions to The processor, the processor is configured to run the code instructions so that the electronic device executes the following method:

Calculate the coupling coefficient k, where,
V 1 is the voltage of the transmitting coil of the charging cable, V 2 is the voltage of the receiving coil of the electronic device, L 1 is the inductance value of the transmitting coil, and L 2 is the inductance value of the receiving coil;

If the coupling coefficient k is within the first threshold range, confirm that the electronic device is in the first charging mode;

If the coupling coefficient k is within the second threshold range, it is confirmed that the electronic device is in the second charging mode.
A chip applied to an electronic device, wherein the chip includes: one or more processors and one or more interfaces; the interface is used to receive code instructions and transmit the code instructions to The processor, the processor is configured to run the code instructions so that the electronic device executes the following method:

Receive the inductance value of the transmitting coil of the charging cable;

If the inductance value is within the first inductance range, confirm that the electronic device is in the first charging mode;

If the inductance value is within the second inductance range, it is confirmed that the electronic device is in the second charging mode.