WO2021013259A1

WO2021013259A1 - Device to be charged, and wireless charging method and system

Info

Publication number: WO2021013259A1
Application number: PCT/CN2020/104607
Authority: WO
Inventors: 林尚波; 万世铭; 杨军
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-07-25
Filing date: 2020-07-24
Publication date: 2021-01-28
Also published as: CN112311024A

Abstract

Provided are a device to be charged (10), and a wireless charging method (20) and system (1). The device to be charged comprises: a battery (108); a wireless receiving circuit (102) for receiving an electromagnetic signal emitted by a wireless charging apparatus (12) and converting the electromagnetic signal into an output current so as to charge the battery; and a control module (104) for periodically starting a wireless charging process according to a preset periodic time when a first indication signal sent by the wireless receiving circuit is received, and for exiting the wireless charging process when a second indication signal sent by the wireless receiving circuit is received. In the wireless charging process, the control module is also used for determining a current wireless charging mode according to the type, fed back by the wireless charging apparatus, of a power supply apparatus (11) electrically connected to the wireless charging apparatus and acquired information of the battery.

Description

Device to be charged, wireless charging method and system

Technical field

The present disclosure relates to the field of wireless charging technology, and in particular to a device to be charged, a wireless charging method and system.

Background technique

With the popularization of wireless charging technology, more and more electronic devices support wireless charging or wireless transmission functions. However, with the current wireless charging technology, due to the unreasonable design of the control process between the device to be charged and the wireless charging base, the charging mode between the power adapter and the wireless charging base and between the device to be charged and the wireless charging base cannot be quickly and reasonably adapted. The wireless charging speed of the device to be charged is slow and the heating is serious.

The above-mentioned information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, so it may include information that does not constitute the prior art known to those of ordinary skill in the art.

Summary of the invention

In view of this, the present disclosure provides a device to be charged, a wireless charging method and system.

Other characteristics and advantages of the present disclosure will become apparent through the following detailed description, or partly learned through the practice of the present disclosure.

According to an aspect of the present disclosure, there is provided a device to be charged, including: a battery; a wireless receiving circuit for receiving an electromagnetic signal emitted by a wireless charging device, and converting the electromagnetic signal into an output current to charge the battery; And a control module, electrically connected to the wireless receiving circuit, for periodically starting the wireless charging process according to a preset period of time when the first indication signal sent by the wireless receiving circuit is received; and when the first indication signal is received When the second instruction signal sent by the wireless receiving circuit, exit the wireless charging process; in the wireless charging process, the control module is also used to electrically connect with the wireless charging device according to feedback from the wireless charging device The type of the power supply device and the acquired battery information determine the current wireless charging mode; wherein, the wireless charging mode includes: a first wireless charging mode and a second wireless charging mode, and the wireless charging device is in The output power in the first wireless charging mode is greater than the output power in the second wireless charging mode.

According to an embodiment of the present disclosure, in the wireless charging process, the control module is further configured to receive the wireless charging through the wireless receiving circuit when receiving the information reading signal sent by the wireless receiving circuit. Feedback information sent by the device, where the feedback information includes: the type of the power supply device.

According to an embodiment of the present disclosure, the control module is configured to determine that the current wireless charging mode is all when the type of the power supply device is the first type or the second type and the state of the battery satisfies a preset condition. The first wireless charging mode; wherein the maximum output power of the first type of power supply device is greater than the maximum output power of the second type of power supply device, and when the device to be charged is in the first charging When performing wireless charging in a wireless charging mode, the power of the electrical energy output by the first type or the second type of power supply device is greater than or equal to the charging power required by the first wireless charging mode; wherein, the preset conditions include the following At least one of the conditions: the temperature of the battery meets a preset temperature range, the voltage of the battery is lower than a preset voltage threshold, and the power of the battery is lower than a preset power threshold.

According to an embodiment of the present disclosure, the control module is further configured to determine that the current wireless charging mode is the second wireless charging mode when the type of the power supply device is the third type; wherein, the third wireless charging mode is The maximum output power of the type of power supply device is less than the maximum output power of the first type of power supply device and the maximum output power of the second type of power supply device, and when the device to be charged performs wirelessly in the second charging mode During charging, the power of the electrical energy output by the third-type power supply device is greater than or equal to the charging power required by the second wireless charging mode.

According to an embodiment of the present disclosure, the control module is further configured to determine whether the charging state of the battery meets a preset charging cut-off according to the current wireless charging mode and the temperature of the battery in the wireless charging process Condition; when the state of charge of the battery meets the charge cut-off condition, stop charging the battery.

According to an embodiment of the present disclosure, the control module is further configured to determine whether the state of charge of the battery whose charging is cut off meets the pre-determined state according to the current wireless charging mode and the temperature of the battery in the wireless charging process. Set the charge recovery condition; when the state of charge of the battery satisfies the charge recovery condition, resume charging the battery.

According to an embodiment of the present disclosure, the control module is further configured to receive the wireless charging via the wireless receiving circuit when receiving the information reading signal sent by the wireless receiving circuit in the wireless charging process. The status information sent by the device; the status information includes at least one of the following information: whether the wireless charging device has entered the wireless charging mode determined by the control module, the overvoltage and overcurrent of the wireless charging device Information, foreign object detection information.

According to an embodiment of the present disclosure, the device to be charged further includes: a voltage conversion module, which is electrically connected to the wireless receiving circuit and the control module, respectively, and is configured to control the The output voltage of the wireless receiving circuit is converted; wherein the control information is determined according to the status information sent by the wireless charging device and the information of the battery.

According to an embodiment of the present disclosure, the device to be charged further includes: a load switching module, which is electrically connected to the wireless receiving circuit, the control module, and the voltage conversion module, respectively, for when the control module is received When the reverse charging enable signal is sent, the reverse charging channel is opened inside the device to be charged.

The control module is further configured to start the wireless receiving circuit by sending a first enable signal to the wireless receiving circuit after the device to be charged is turned on.

According to an embodiment of the present disclosure, the control module is further configured to determine whether the wireless receiving circuit needs to be firmware based on the stored firmware version number after the device to be charged is turned on and before the wireless receiving circuit is started. upgrade.

According to an embodiment of the present disclosure, the information of the battery includes at least one of the following information: temperature, power, voltage, and charging current of the battery.

According to another aspect of the present disclosure, a wireless charging method is provided, which is applied to a device to be charged, including: when a first indication signal sent by a wireless receiving circuit of the device to be charged is received, according to a preset cycle time, To start the wireless charging process, the wireless charging process includes: determining the current wireless charging mode according to the type of the power supply device electrically connected to the wireless charging device and the acquired information of the battery, which is fed back by the wireless charging device And when the second instruction signal sent by the wireless receiving circuit is received, exit the wireless charging process; wherein, the wireless charging mode includes: a first wireless charging mode and a second wireless charging mode, the wireless charging The output power of the device in the first wireless charging mode is greater than the output power in the second wireless charging mode.

According to an embodiment of the present disclosure, the wireless charging process further includes: when receiving the information read signal sent by the wireless receiving circuit, receiving the feedback information sent by the wireless charging device through the wireless receiving circuit, so The feedback information includes: the type of the power supply device.

According to an embodiment of the present disclosure, the method further includes: when the type of the power supply device is the first type or the second type and the state of the battery satisfies a preset condition, determining that the current wireless charging mode is all The first wireless charging mode; wherein the maximum output power of the first type of power supply device is greater than the maximum output power of the second type of power supply device, and when the device to be charged is in the first charging When performing wireless charging in a wireless charging mode, the power of the electrical energy output by the first type or the second type of power supply device is greater than or equal to the charging power required by the first wireless charging mode; wherein, the preset conditions include the following At least one of the conditions: the temperature of the battery meets a preset temperature range, the voltage of the battery is lower than a preset voltage threshold, and the power of the battery is lower than a preset power threshold.

According to an embodiment of the present disclosure, the method further includes: when the type of the power supply device is a third type, determining that the current wireless charging mode is the second wireless charging mode; wherein, the third type The maximum output power of the power supply device is less than the maximum output power of the first type power supply device and the second type power supply device, and when the device to be charged performs wireless charging in the second charging mode At this time, the power of the electrical energy output by the third-type power supply device is greater than or equal to the charging power required by the second wireless charging mode.

According to an embodiment of the present disclosure, the method further includes: in the wireless charging process, according to the current wireless charging mode and the temperature of the battery, determining whether the charging state of the battery meets a preset charging cut-off condition When the state of charge of the battery satisfies the charge cut-off condition, stop charging the battery.

According to an embodiment of the present disclosure, the method further includes: in the wireless charging process, according to the current wireless charging mode and the temperature of the battery, determining whether the charging state of the battery whose charging is cut off meets a preset When the state of charge of the battery satisfies the charge recovery condition, the charging of the battery is resumed.

According to an embodiment of the present disclosure, the method further includes: in the wireless charging process, when the information reading signal sent by the wireless receiving circuit is received, receiving the wireless charging device through the wireless receiving circuit Status information sent; the status information includes at least one of the following information: whether the wireless charging device has entered the wireless charging mode determined by the control module, and overvoltage and overcurrent information of the wireless charging device , Foreign body detection information.

According to an embodiment of the present disclosure, the method further includes: sending control information to the voltage conversion module of the device to be charged according to the status information and information of the battery sent by the wireless charging device, so as to The output voltage of the wireless receiving circuit is converted.

According to an embodiment of the present disclosure, the method further includes: when it is detected that the user starts the reverse charging function, sending a reverse charging enable signal to the load switching module in the device to be charged to A reverse charging channel is opened inside the device; and a reverse charging configuration is performed on the wireless receiving circuit and the voltage conversion module in the device to be charged.

According to an embodiment of the present disclosure, the method further includes: after the device to be charged is turned on, starting the wireless receiving circuit by sending a first enable signal to the wireless receiving circuit.

According to an embodiment of the present disclosure, after the device to be charged is turned on and before the wireless receiving circuit is started, the method further includes: determining whether the wireless receiving circuit needs to be upgraded with firmware through the stored firmware version number .

According to one aspect of the present disclosure, there is provided a wireless charging system, including: any of the above-mentioned equipment to be charged, a wireless charging device, and a power supply device; wherein the wireless charging device is used to convert input electrical energy into an electromagnetic signal Transmit to perform wireless charging for the device to be charged; the power supply device is used to provide the input power for the wireless charging device.

According to the device to be charged provided by the embodiments of the present disclosure, the device to be charged can quickly enter the fast wireless charging mode (such as the above-mentioned first wireless charging mode) through the control process, and the charging speed of the device to be charged can be accelerated.

It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present disclosure.

Description of the drawings

By describing its exemplary embodiments in detail with reference to the accompanying drawings, the above and other objectives, features, and advantages of the present disclosure will become more apparent.

Fig. 1 is a block diagram showing a device to be charged according to an exemplary embodiment.

Fig. 2 is a schematic structural diagram of a wireless charging system according to an exemplary embodiment.

Fig. 3 is a block diagram showing another device to be charged according to an exemplary embodiment.

Fig. 4 is a flow chart showing a wireless charging method according to an exemplary embodiment.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the examples set forth herein; on the contrary, the provision of these embodiments makes the present disclosure more comprehensive and complete, and fully conveys the concept of the example embodiments To those skilled in the art. The drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures denote the same or similar parts, and thus their repeated description will be omitted.

Furthermore, the described features, structures or characteristics can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid overwhelming attention and obscure various aspects of the present disclosure.

In the present disclosure, unless otherwise clearly defined and defined, the terms "connected", "connected" and other terms should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, or integrated; they may be electrical The connection can also be a communication connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.

In addition, in the description of the present disclosure, the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.

In the process of wireless charging, a power supply device (such as an adapter) is generally connected to a wireless charging device (such as a wireless charging base), and the output power of the power supply device is wirelessly (such as electromagnetic signals or electromagnetic waves) through the wireless charging device. Transfer to the device to be charged, and wirelessly charge the device to be charged.

According to different principles of wireless charging, wireless charging methods are mainly divided into three methods: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves. At present, mainstream wireless charging standards include QI standard, Power Matters Alliance (PMA) standard, and Wireless Power Alliance (Alliance for Wireless Power, A4WP). Both the QI standard and the PMA standard use magnetic coupling for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

The device 10 to be charged as shown in FIG. 1 may be, for example, a terminal or a communication terminal. The terminal or communication terminal includes but is not limited to being set to be connected via a wired line, such as via a public switched telephone network (PSTN), Digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network and/or via, for example, cellular network, wireless local area network (WLAN), such as handheld Digital video broadcasting (digital video broadcasting handheld, DVB-H) network digital TV network, satellite network, amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and/or wireless interface of another communication terminal A device for receiving/sending communication signals. A communication terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" and/or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, and the Internet/ Personal digital assistant (PDA) with intranet access, web browser, memo pad, calendar, and/or global positioning system (GPS) receiver; and conventional laptop and/or palmtop Receiver or other electronic device including a radio telephone transceiver. In addition, the terminal can also include, but is not limited to, electronic book readers, smart wearable devices, mobile power sources (such as power banks, travel chargers), electronic cigarettes, wireless mice, wireless keyboards, wireless headphones, Bluetooth speakers, etc. Rechargeable electronic equipment.

1, the device 10 to be charged includes: a wireless receiving circuit 102, a control module 104, a voltage conversion module 106 and a battery 108.

Fig. 2 is a schematic structural diagram of a wireless charging system according to an exemplary embodiment. As shown in FIG. 2, the wireless charging system 1 includes: a power supply device 11, a wireless charging device 12 and a device 10 to be charged. It should be noted that, in order to simplify the drawings, the device to be charged 10 in FIG. 2 does not show a specific structure. For the specific structure of the device 10 to be charged, see FIG. 1.

The device 10 to be charged will be described in detail below with reference to FIGS. 1 and 2 in combination.

The power supply device 11 may be, for example, a power adapter, a power bank (Power Bank) and other equipment. The wireless charging device 12 may be, for example, a wireless charging base.

After the power supply device 11 is connected to the wireless charging device 12, the output current is transmitted to the wireless charging device 12.

The wireless charging device 12 includes a wireless transmitting circuit 121 and a first control module 122.

The wireless transmitting circuit 121 is used to convert the electric energy output by the power supply device 11 into electromagnetic signals (or electromagnetic waves) for transmission, so as to perform wireless charging for the device 10 to be charged. For example, the wireless transmission circuit 121 may include: a wireless transmission drive circuit and a transmission coil (or transmission antenna). The wireless transmission drive circuit is used to convert the direct current output by the power supply device 11 into high frequency alternating current, and convert the high frequency alternating current into an electromagnetic signal (or electromagnetic wave) through a transmitting coil or a transmitting antenna and transmit it out.

The first control module 122 may be implemented by, for example, a micro control unit (MCU). The first control module 122 may be used to perform wireless communication with the device 10 to be charged during the wireless charging process of the device 10 to be charged by the wireless charging device 12. Specifically, the first control module 122 may perform wireless communication with the control module 104 in the device 10 to be charged.

In addition, the wireless charging device 12 may further include a charging interface 123. The wireless transmitting circuit 121 can also be used to receive the electric energy output by the power supply device 11 through the charging interface 123, and generate an electromagnetic signal (or electromagnetic wave) according to the electric energy output by the voltage supply device 11.

The charging interface 123 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 123 may also be a lightning interface, or any other type of parallel port or serial port that can be used for charging.

The wireless charging device 12 can communicate with the power supply device 11, for example, it can communicate through the charging interface 123, without setting an additional communication interface or other wireless communication module, which can simplify the implementation of the wireless charging device 12. If the charging interface 123 is a USB interface, the wireless charging device 12 (or the wireless transmitting circuit 121) and the power supply device 11 can communicate based on the data lines (such as D+ and/or D- lines) in the USB interface. For another example, the charging interface 123 is a USB interface (such as a USB TYPE-C interface) that supports a power delivery (PD) communication protocol, and the wireless charging device 12 (or wireless transmission circuit 121) and the power supply device 11 may be based on the PD communication protocol To communicate.

In addition, the wireless charging device 12 may also be communicatively connected with the power supply device 11 through other communication methods other than the charging interface 123. For example, the wireless charging device 12 may communicate with the power supply device 11 in a wireless manner, such as Near Field Communication (NFC).

The wireless receiving circuit 102 in the device to be charged 10 is used to receive the electromagnetic signal (or electromagnetic wave) emitted by the wireless transmitting circuit 121 and convert the electromagnetic signal (or electromagnetic wave) into the direct current output by the wireless receiving circuit 102. For example, the wireless receiving circuit 102 may include: a receiving coil or a receiving antenna, and a rectifying circuit and/or a filtering circuit connected to the receiving coil or the receiving antenna and other shaping circuits. The wireless receiving circuit 102 converts the electromagnetic signal (or electromagnetic wave) emitted by the wireless transmitting circuit 121 into alternating current through a receiving coil or a receiving antenna, and rectifies and/or filters the alternating current through a shaping circuit, thereby converting the alternating current into a stable Direct current to charge the battery 108.

It should be noted that the embodiment of the present disclosure does not specifically limit the specific form of the shaping circuit and the form of the output voltage and output current of the wireless receiving circuit 102 obtained after the shaping circuit is shaped.

When the output voltage of the wireless receiving circuit 102 cannot meet the requirements of the charging voltage expected by the battery 108, and/or the output current of the wireless receiving circuit 102 cannot meet the requirements of the expected charging current of the battery 108, you can set the first The voltage conversion module 106 on the charging channel 110 (for example, a wire) performs conversion to obtain the expected charging voltage and/or charging current of the battery 108. For example, the output voltage and output current of the wireless receiving circuit 102 are input into the voltage conversion module 106 through the first charging channel 110; after the voltage conversion module 106 converts the input voltage, the output voltage and current pass through the first charging channel 110 Loaded on both ends of the battery 108 to meet the expected charging voltage and/or charging current requirements of the battery 108.

The battery 108 may include a single cell or multiple cells. When the battery 108 includes multiple cells, the multiple cells may be connected in series. As a result, the charging voltage that the battery 108 can withstand is the sum of the charging voltages that a plurality of cells can withstand, which can increase the charging speed and reduce charging heat.

For example, taking the device to be charged 10 as a mobile phone as an example, when the battery 108 of the device to be charged 10 includes a single cell, the voltage of the internal single cell is generally between 3.0V and 4.45V. When the battery 108 of the device to be charged 10 includes two battery cells connected in series, the total voltage of the two battery cells connected in series is 6.0V-8.9V. Therefore, compared with a single cell, when multiple cells are connected in series, the output voltage of the wireless receiving circuit 102 can be increased. Compared with a single-cell battery, it achieves the same charging speed. The charging current required by a multi-cell battery is about 1/N of the charging current required by a single-cell battery (N is the series connection in the device to be charged 10). The number of batteries). In other words, under the premise of ensuring the same charging speed (same charging power), adopting a solution with multiple battery cells can reduce the size of the charging current, thereby reducing the heat generated by the device 10 to be charged during the charging process. On the other hand, compared with the single-cell solution, under the condition that the charging current remains the same, the multi-cell series solution can increase the charging voltage, thereby increasing the charging speed.

The control module 104 may be implemented by an independent MCU, or may also be implemented by an application processor (AP) inside the device 13 to be charged. The control module 104 is used to communicate with the first control module 122 in the wireless charging device 12.

The control module 104 communicates with the wireless charging device 12 in a wireless manner. The present disclosure does not limit the communication method and communication sequence between the wireless charging device 12 and the device 10 (control module 104) to be charged. For example, it may be one-way wireless communication or two-way wireless communication. It may be a communication initiated by the device to be charged 10 or a communication initiated by the wireless charging device 12. During the wireless communication process, the device 10 to be charged can couple the information to be sent to the receiving coil of the wireless receiving circuit 102, and then send it to the transmitting coil of the wireless transmitting circuit 121, and then the wireless transmitting circuit 121 will decouple the information. The information is sent to the first control module 122. Conversely, in two-way communication, the wireless charging device 12 can couple the information to be sent to the transmitting coil of the wireless transmitting circuit 121 to send it to the receiving coil of the wireless receiving circuit 102 of the device to be charged 10, and then the device to be charged The receiving coil of the wireless receiving circuit 102 of 10 is decoupled.

Alternatively, the device 10 to be charged can also communicate via Bluetooth, WiFi, mobile cellular networks (such as 2G, 3G, 4G or 5G), wireless communications (such as IEEE 802.11, 802.15 (WPANs), 802.16 (WiMAX), 802.20, etc.), At least one of communication methods such as short-range wireless communication, optical communication (such as infrared communication), ultrasonic communication, and ultra-wideband (UMB) communication using a high-frequency antenna (such as 60 GHz) communicates with the wireless charging device 12. It is understandable that when communicating through the above-mentioned communication method, the device to be charged 10 and the wireless charging device 12 also include corresponding communication modules, such as a Bluetooth communication module, a WiFi communication module, a 2G/3G/4G/5G mobile communication module, High frequency antenna, optical communication module. At least one of an ultrasonic communication module, an ultra-wideband communication module, and the like. It should be understood that the aforementioned standards applicable to wireless communication include past and existing standards, and, without departing from the scope of the present disclosure, also include future versions and future standards that adopt these standards. By communicating through the above-mentioned wireless communication method, the reliability of communication can be improved, thereby improving charging safety. Compared with the related technology (for example, the Qi standard), the feedback information is coupled to the receiving coil of the wireless receiving circuit 102 for communication through signal modulation, which can improve the reliability of communication and avoid the use of signal coupling communication bands. The incoming voltage ripple affects the voltage processing process of the voltage conversion module 106 of the device 10 to be charged. In addition, for the voltage ripple when the wireless receiving coil is output, if the ripple is not effectively processed, it may cause wireless charging safety problems, and there are certain safety risks. Communication through the above-mentioned wireless communication method can eliminate voltage ripple, thereby eliminating the need for a circuit for processing voltage ripple, reducing the complexity of the charging circuit of the device 10 to be charged, improving charging efficiency, and saving circuit installation space, cut costs.

Fig. 3 is a block diagram showing another device to be charged according to an exemplary embodiment. As shown in FIG. 3, the wireless receiving circuit 102 may be implemented as a transmitting/receiving chip, for example, the control module 104 may be an application processor (AP) in the device to be charged, and the voltage conversion module 106 may be implemented, for example. It is a charging chip, specifically, for example, a charge pump (Chargepump).

Wherein, the control module 104 and the wireless receiving circuit 102 communicate through multiple pins. These pins may include: pins for transmitting clock signals (for example, pin 1 in Figure 3), pins for transmitting data (for example, pin 2 in Figure 3), and pins for transmitting signals Pins (for example, pins 3, 4, and 5 in Figure 3). The control module 104 and the voltage conversion module 106 are connected through a pin for transmitting a clock signal (for example, pin 6 in FIG. 3) and a pin for transmitting data (for example, pin 7 in FIG. 3) .

The following describes how the control module 104 in the device to be charged 10 performs wireless charging process control with reference to FIGS. 1 to 3.

After the device 10 to be charged is turned on, the control module 104 starts the wireless receiving circuit 102 by sending a first enable signal (for example, the enable signal sent through the pin 5 shown in FIG. 3) to the wireless receiving circuit 102. When receiving the first indication signal sent by the wireless receiving circuit 102 (for example, the signal sent by the wireless receiving circuit 102 through pin 4 shown in FIG. 3 and set to a high level), the control module 104 according to the preset period The time (for example, it can be 500 ms, but the present disclosure is not limited to this), the wireless charging process is started periodically. When receiving the second instruction signal sent by the wireless receiving circuit 102 (for example, the signal sent by the wireless receiving circuit 102 through pin 4 shown in FIG. 3 and set to a low level), the control module 104 exits the wireless charging Process.

In the wireless charging process, the control module 104 is used to determine the current wireless charging mode according to the type of the power supply device 11 that is fed back by the wireless charging device 12 and electrically connected to the wireless charging device 12, and the acquired information of the battery 108 .

The wireless charging mode may include, for example, a first wireless charging mode and a second wireless charging mode. The first wireless charging mode may be a fast wireless charging mode. The second wireless charging mode may be referred to as a normal wireless charging mode. In the first wireless charging mode, the charging speed of the device 10 to be charged is faster than the charging speed in the second wireless charging mode. In other words, compared to the device to be charged 10 working in the second wireless charging mode, the device to be charged 10 working in the first wireless charging mode takes less time to charge a battery of the same capacity.

The common wireless charging mode may refer to a wireless charging mode in which the transmission power of the wireless charging device 12 is small (usually less than 15W, and the commonly used transmission power is 5W or 10W). For example, it can be a traditional wireless charging mode based on the QI standard, the PMA standard, or the A4WP standard. In the normal wireless charging mode, it usually takes several hours to fully charge a large-capacity battery (such as a 3,000 mAh battery).

In the fast wireless charging mode, the transmission power of the wireless charging device 12 is relatively large (usually greater than or equal to 15W, such as 15-25W). Compared with the normal wireless charging mode, the charging time required for the wireless charging device 12 to fully charge the battery of the same capacity in the fast wireless charging mode can be significantly shortened and the charging speed is faster.

In the above-mentioned wireless charging process, the control module 104 is also used for receiving the information reading signal sent by the wireless receiving circuit 102 (for example, the interrupt signal sent by the wireless receiving circuit 102 through the pin 3 shown in FIG. 3) through The communication with the wireless charging device 12 (for example, communicating with the wireless charging device 12 through the wireless receiving circuit 102 as described above) receives feedback information sent by the wireless charging device 12. The feedback information may include, for example, the type of the power supply device 11.

The types of the power supply device 11 are divided according to the maximum power that can be output, and may include: a first type, a second type, and a third type. The maximum output power of the first type of power supply device 11 is the highest, for example, 50W (10V/5A); the second type of power supply device 11 has the second highest output power, for example, it can be 20W (5V/4A); The maximum output power of the third type of power supply device is the lowest, for example, it may be 5W or 10W.

When the three types of power supply devices 11 provide power to the wireless charging device 12, they may also include two charging modes: a first charging mode and a second charging mode. Wherein, the first charging mode may be a fast charging mode, and the second charging mode may be a normal charging mode.

The normal charging mode refers to the power supply device 11 outputting a relatively small current value (usually less than 2.5A) or outputting a relatively small power to the wireless charging device 12 (usually less than 15W, such as 5W/10W). Compared with the normal charging mode, the output power of the power supply device 11 in the fast charging mode is higher, such as the aforementioned 20W, 50W, etc.

The first type and the second type of power supply device 11 may respectively support the first charging mode and the second charging mode, while the third type of power supply device 11 only supports the second charging mode, that is, the normal charging mode.

When determining the current wireless charging mode, the control module 104 needs to know the type of the power supply device 11, and determine the charging mode supported by the power supply device 11 according to the type of the power supply device 11, so as to refer to the charging mode supported by the power supply device 11 To determine the current wireless charging mode. The wireless charging mode used between the wireless charging device 12 and the device to be charged 10 needs to match the charging mode used between the wireless charging device 12 and the power supply device 11, that is, the power supply device 11 works in the first charging mode When the power of the electrical energy output is greater than or equal to the charging power required by the first wireless charging mode; when the power supply device 11 works in the second charging mode, the power of the electrical energy output is greater than or equal to the power required by the second wireless charging mode . If the device to be charged 10 requests the aforementioned first wireless charging mode, the device to be charged 10 first needs to determine that the power supply device 11 is a first type or a second type of power supply device that can support the first charging mode.

The aforementioned battery information may include, for example, at least one of the following information: the temperature, power, voltage, and charging current of the battery 108.

The power, voltage, and current of the battery 108 can be detected by a detection device built into the battery 108, for example, the power of the battery 108 can be measured by a fuel gauge. In addition, the voltage and charging current of the battery 108 may also be the charging voltage and charging current detected by the detection module 112 shown in FIG. 1.

Referring to FIG. 1, the detection circuit 112 is used to detect the voltage value and/or current value on the first charging channel 110. The voltage value and/or current value on the first charging channel 110 may refer to the voltage value and/or current value between the voltage conversion module 106 and the battery 108, that is, the output voltage and/or output current of the voltage conversion module 106, the output voltage And/or the output current is directly loaded to the battery 108 to charge the battery 108. Alternatively, the voltage value and/or current value on the first charging channel 110 may also refer to the voltage value and/or current value between the wireless receiving circuit 102 and the voltage conversion module 106, that is, the output voltage value and/or current value of the wireless receiving circuit 102 Or current value.

In some embodiments, the detection circuit 112 may include: a voltage detection circuit and a current detection circuit. The voltage detection circuit is used to sample the voltage on the first charging channel 110, and the voltage detection circuit may sample the output voltage of the wireless receiving circuit 102 in a series voltage division manner, for example. The current detection circuit is used to sample the current on the first charging channel 110, and the current detection circuit may sample the current on the first charging channel 110 through a current-sense resistor and a galvanometer, for example.

According to the type of the power supply device 11 and the information of the battery 108, the control module 104 can determine the current wireless charging mode during the wireless charging process. When the type of the power supply device is the first type or the second type and the state of the battery meets the preset condition, it is determined that the current wireless charging mode is the first wireless charging mode. The preset condition includes at least one of the following conditions: the temperature of the battery 108 satisfies a preset temperature range (the preset temperature range may be room temperature, for example, between 17°C and 42°C), and the voltage of the battery 108 is lower than The preset voltage threshold (the voltage threshold may be set to 4.35V, for example), the power of the battery 108 is lower than the preset power threshold (the power threshold may be set to, for example, 88% of the capacity of the battery 108). Preferably, when the type of the power supply device 11 is the first type or the second type and the temperature of the battery 108, the voltage of the battery 108, and the power of the battery 108 are all satisfied, it is determined that the current wireless charging mode is the first wireless charging mode.

In addition, when the type of the power supply device 11 is the third type, it is determined that the current wireless charging mode is the second wireless charging mode.

The control module 104 can also be used to determine whether the current charging state of the battery 108 meets the preset charging cut-off condition according to the current wireless charging mode and the temperature of the battery 108 in the above-mentioned periodic wireless charging process; when the charging state of the battery 108 When the charge cutoff condition is met, the charging of the battery 108 is cut off. Under different temperatures and wireless charging modes, different charge cutoff conditions can be set. The charge cutoff conditions may include, for example, that the voltage of the battery 108 is greater than the charge cutoff voltage and/or the charge current of the battery 108 is less than the charge cutoff current.

In addition, the control module 104 is also used for determining whether the current state of charge of the battery 108 whose charging has been cut off meets the preset charging recovery condition according to the current wireless charging mode and the temperature of the battery 108 in the above-mentioned periodic wireless charging process; When it is determined that the state of charge of the battery 108 satisfies the charge recovery condition, the charging of the battery 108 is resumed. The charge recovery condition may include, for example, when the voltage of the battery 108 is lower than a preset threshold of the charge cut-off voltage, determining that it meets the charge recovery condition.

The control module 104 can also receive state information fed back from the wireless charging device 12, such as whether the wireless charging device 12 enters the wireless charging mode requested by the device to be charged 10, whether the wireless charging device 12 is overvoltage, overcurrent, and whether foreign objects are detected. (FOD) and other information.

According to the status information and battery information (such as power, voltage, charging current, etc.), the control module 104 may also determine control information for controlling the voltage conversion module 106 to perform voltage conversion. For example, as described above, when the output voltage of the wireless receiving circuit 102 cannot meet the expected charging voltage requirement of the battery 108, and/or the output current of the wireless receiving circuit 102 cannot meet the expected charging current requirement of the battery 108, it can be controlled The voltage conversion module 106 performs conversion to obtain the expected charging voltage and/or charging current of the battery 108. In different wireless charging modes, the expected charging voltage and/or charging current of the battery 108 will be different.

In addition, as shown in FIG. 3, the device 10 to be charged may further include: a load switching module 114 and a charging interface 116.

The charging interface 116 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 123 may also be a lightning interface, or any other type of parallel port or serial port that can be used for charging.

The device 10 to be charged can also be charged via the charging interface 116 based on the switching control of the load switching module 114, that is, directly connected to a power supply device (such as a power adapter) through the charging interface 116, and directly receives the power provided by the power supply device. .

In addition, the load switching module 114 is also used to, when receiving the reverse charging enable signal sent by the control module 104 (for example, the enable signal sent through pin 8 as shown in FIG. 3), the wireless receiving circuit 102 and the voltage The conversion module 106 performs a reverse charging configuration to open a reverse charging channel inside the device 10 to be charged.

For example, the user may manually turn on the reverse charging function, so that the device to be charged 10 can be used as an electric power provider to wirelessly charge other devices to be charged that can be charged wirelessly. When the reverse charging function needs to be activated, the control module 104 configures the relevant registers of the wireless receiving circuit 102 and the voltage conversion module 106, enables these registers, and enables the reverse charging function. In addition, the load switching module 114 is notified to perform internal channel switching, so that the voltage of the battery 108 is transmitted to the channel of the wireless receiving circuit 102 (used as a wireless transmitting circuit during reverse charging) for reverse charging. At this time, the function of the voltage conversion module 106 includes a voltage/current adjustment function to control the power output to the wireless receiving circuit 102. Those skilled in the art should understand that the device 10 to be charged must be in a non-charging state when performing reverse charging.

In addition, the control module 104 is also configured to determine whether the wireless receiving circuit 102 needs to be upgraded with firmware through the stored firmware version number after the device to be charged 10 is turned on and before the wireless receiving circuit 102 is started. If the firmware of the wireless receiving circuit 102 needs to be updated, the control module 104 executes a related firmware update process, and writes the new firmware version into the wireless receiving circuit 102 through pin 2.

It should be clearly understood that the present disclosure describes how to form and use specific examples, but the principles of the present disclosure are not limited to any details of these examples. On the contrary, based on the teaching of the contents of the present disclosure, these principles can be applied to many other embodiments.

It should be noted that the block diagram shown in the above drawings is a functional entity, and does not necessarily correspond to a physically or logically independent entity. These functional entities may be implemented in the form of software, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and/or processor devices and/or microcontroller devices.

The following are embodiments of the disclosed method, which can be applied to the above-mentioned device embodiments. For details not disclosed in the method embodiments of the present disclosure, please refer to the device embodiments of the present disclosure.

The wireless charging method 20 shown in FIG. 4 can be applied to the above-mentioned device to be charged 10, and specifically can be executed by the control module 104 in the device to be charged 10.

Referring to FIG. 4, the wireless charging method 20 includes:

In step S202, when the first instruction signal sent by the wireless receiving circuit is received, the wireless charging process is periodically initiated according to the preset period of time. The wireless charging process includes: according to the feedback of the wireless charging device and electrically connecting with the wireless charging device The type of the power supply device and the acquired battery information determine the current wireless charging mode.

The wireless charging mode includes: a first wireless charging mode and a second wireless charging mode, and the output power of the wireless charging device in the first wireless charging mode is greater than the output power in the second wireless charging mode.

In some embodiments, the battery information includes at least one of the following information: temperature, power, voltage, and charging current of the battery.

In some embodiments, the method 20 may further include: when receiving the information read signal sent by the wireless receiving circuit, receiving feedback information sent by the wireless charging device through the wireless receiving circuit, the feedback information includes: the type of the power supply device.

Among them, the types of power supply devices include: the first type, the second type, and the third type. The maximum output power of the first type of power supply device is greater than the maximum output power of the second type of power supply device. The maximum output power of the power supply device is greater than the maximum output power of the third type of power supply device;

The charging modes of the first type of power supply device and the second type of power supply device include: a first charging mode and a second charging mode, wherein the first type of power supply device and the second type of power supply device are charged in the first The output power in the mode is greater than the output power of the first type of power supply device and the second type of power supply device in the second charging mode; the charging mode of the third type of power supply device includes: the second charging mode. When the power supply device works in the first charging mode, the power of the electrical energy output is greater than or equal to the charging power required by the first wireless charging mode; when the power supply device works in the second charging mode, the power of the electrical energy output is greater than or equal to The power required for the second wireless charging mode.

In some embodiments, the method 20 may further include: in the wireless charging process, according to the current wireless charging mode and the temperature of the battery, determining whether the charging state of the battery meets the preset charging cut-off condition; when the charging state of the battery satisfies charging When the cut-off condition, the charging of the battery is cut off.

In some embodiments, the method 20 may further include: in the wireless charging process, according to the current wireless charging mode and the temperature of the battery, determining whether the charging state of the battery that has been turned off meets the preset charging recovery condition; When the state of charge satisfies the charge recovery condition, the battery will be recharged.

In some embodiments, the method 20 may further include: in the wireless charging process, when the information read signal sent by the wireless receiving circuit is received, receiving the status information sent by the wireless charging device through the wireless receiving circuit; the status information includes the following At least one of the information: whether the wireless charging device has entered the wireless charging mode determined by the control module, overvoltage and overcurrent information of the wireless charging device, and foreign object detection information.

In some embodiments, the method 20 may further include: sending control information to the voltage conversion module of the device to be charged according to the status information and battery information sent by the wireless charging device to convert the output voltage of the wireless receiving circuit.

In step S204, when the second instruction signal sent by the wireless receiving circuit is received, the wireless charging process is exited.

In some embodiments, the method 20 may further include: when it is detected that the user can start reverse charging, sending a reverse charging enable signal to the load switching module in the device to be charged to enable reverse charging in the device to be charged. Charging channel; and reverse charging configuration for the voltage conversion module in the wireless receiving circuit and the device to be charged.

In some embodiments, before step S202, the method 20 may further include:

In step S206, after the device to be charged is turned on, the wireless receiving circuit is activated by sending the first enable signal to the wireless receiving circuit in the device to be charged. The wireless receiving circuit is used to receive the electromagnetic signal emitted by the wireless charging device and The electromagnetic signal is converted into an output current to charge the battery in the device to be charged.

In some embodiments, after the device to be charged is turned on and before the wireless receiving circuit is started, the method 20 may further include: determining whether the wireless receiving circuit needs to be upgraded with firmware based on the stored firmware version number. If it is necessary to upgrade the firmware of the wireless receiving circuit, write a new firmware version to the wireless receiving circuit.

According to the wireless charging method provided by the embodiments of the present disclosure, the device to be charged can quickly enter the fast wireless charging mode (such as the above-mentioned first wireless charging mode) through the control process, and the charging speed of the device to be charged can be accelerated.

Those skilled in the art can understand that all or part of the steps for implementing the foregoing embodiments are implemented as a computer program executed by a processor. When the computer program is executed by the processor, it executes the above-mentioned functions defined by the above-mentioned method provided in the present disclosure. The program can be stored in a computer-readable storage medium, which can be a read-only memory, a magnetic disk, or an optical disk.

In addition, it should be noted that the above-mentioned drawings are only schematic illustrations of the processing included in the method according to the exemplary embodiment of the present disclosure, and are not intended for limitation. It is easy to understand that the processing shown in the above drawings does not indicate or limit the time sequence of these processings. In addition, it is easy to understand that these processes can be executed synchronously or asynchronously in multiple modules, for example.

The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure intends to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims.

Claims

A device to be charged is characterized in that it comprises:

battery;

The wireless receiving circuit is used to receive the electromagnetic signal emitted by the wireless charging device and convert the electromagnetic signal into an output current to charge the battery; and

The control module is electrically connected to the wireless receiving circuit, and is configured to periodically start the wireless charging process according to a preset cycle time when the first indication signal sent by the wireless receiving circuit is received;

And when receiving the second instruction signal sent by the wireless receiving circuit, exit the wireless charging process;

In the wireless charging process, the control module is further configured to determine the current battery according to the type of the power supply device electrically connected to the wireless charging device and the acquired information of the battery fed back by the wireless charging device Wireless charging mode;

Wherein, the wireless charging mode includes: a first wireless charging mode and a second wireless charging mode, and the output power of the wireless charging device in the first wireless charging mode is greater than the output in the second wireless charging mode power.
The device to be charged according to claim 1, characterized in that, in the wireless charging process, the control module is further configured to, when receiving the information reading signal sent by the wireless receiving circuit, pass the wireless The receiving circuit receives feedback information sent by the wireless charging device, where the feedback information includes: the type of the power supply device.
The device to be charged according to claim 2, wherein the control module is configured to determine when the type of the power supply device is the first type or the second type and the state of the battery meets a preset condition The current wireless charging mode is the first wireless charging mode;

Wherein, the maximum output power of the first type of power supply device is greater than the maximum output power of the second type of power supply device, and when the device to be charged performs wireless charging in the first charging mode, The power of the electrical energy output by the first type or the second type of power supply device is greater than or equal to the charging power required by the first wireless charging mode;

Wherein, the preset condition includes at least one of the following conditions: the temperature of the battery satisfies a preset temperature range, the voltage of the battery is lower than a preset voltage threshold, and the power of the battery is lower than a preset The battery threshold.
The device to be charged according to claim 3, wherein the control module is further configured to determine that the current wireless charging mode is the second wireless charging mode when the type of the power supply device is the third type ；

Wherein, the maximum output power of the third type of power supply device is less than the maximum output power of the first type of power supply device and the second type of power supply device, and when the device to be charged is in the When wireless charging is performed in the second charging mode, the power of the electrical energy output by the third-type power supply device is greater than or equal to the charging power required by the second wireless charging mode.
The device to be charged according to claim 1, wherein the control module is further configured to determine the state of charge of the battery according to the current wireless charging mode and the temperature of the battery in the wireless charging process Whether the preset charging cut-off condition is met; when the charging state of the battery meets the charging cut-off condition, the charging of the battery is cut off.
The device to be charged according to claim 5, wherein the control module is further configured to determine the charge-off device according to the current wireless charging mode and the temperature of the battery in the wireless charging process Whether the state of charge of the battery meets the preset charge recovery condition; when the state of charge of the battery meets the charge recovery condition, resume charging the battery.
The device to be charged according to claim 1, wherein the control module is further configured to, in the wireless charging process, when receiving the information reading signal sent by the wireless receiving circuit, pass the wireless The receiving circuit receives the status information sent by the wireless charging device; the status information includes at least one of the following information: whether the wireless charging device has entered the wireless charging mode and the wireless charging mode determined by the control module; Overvoltage and overcurrent information of the charging device and foreign object detection information.
The device to be charged according to claim 7, further comprising: a voltage conversion module, which is electrically connected to the wireless receiving circuit and the control module, respectively, and is configured to respond to the control information sent by the control module The output voltage of the wireless receiving circuit is converted; wherein the control information is determined according to the status information sent by the wireless charging device and the information of the battery.
The device to be charged according to claim 8, further comprising: a load switching module, which is electrically connected to the wireless receiving circuit, the control module, and the voltage conversion module, respectively, for when the When the reverse charging enable signal sent by the control module, the reverse charging channel is opened inside the device to be charged.
The device to be charged according to claim 1, wherein the control module is further configured to send a first enable signal to the wireless receiving circuit after the device to be charged is turned on to start the wireless receiving circuit. Circuit.
A wireless charging method applied to a device to be charged, characterized in that it includes:

When the first indication signal sent by the wireless receiving circuit of the device to be charged is received, the wireless charging process is periodically initiated according to the preset period time. The wireless charging process includes: according to the feedback of the wireless charging device and the The type of the power supply device electrically connected to the wireless charging device and the acquired information of the battery, determining the current wireless charging mode; and

Exit the wireless charging process when receiving the second indication signal sent by the wireless receiving circuit;

Wherein, the wireless charging mode includes: a first wireless charging mode and a second wireless charging mode, and the output power of the wireless charging device in the first wireless charging mode is greater than the output in the second wireless charging mode power.
The method according to claim 11, wherein the wireless charging process further comprises: when receiving the information reading signal sent by the wireless receiving circuit, receiving the information sent by the wireless charging device through the wireless receiving circuit The feedback information includes: the type of the power supply device.
The method according to claim 12, further comprising: when the type of the power supply device is the first type or the second type and the state of the battery meets a preset condition, determining the current wireless charging mode Is the first wireless charging mode;

Wherein, the maximum output power of the first type of power supply device is greater than the maximum output power of the second type of power supply device, and when the device to be charged performs wireless charging in the first charging mode, The power of the electrical energy output by the first type or the second type of power supply device is greater than or equal to the charging power required by the first wireless charging mode;

The preset condition includes at least one of the following conditions: the temperature of the battery meets a preset temperature range, the voltage of the battery is lower than a preset voltage threshold, and the power of the battery is lower than a preset Power threshold.
The method according to claim 13, further comprising: when the type of the power supply device is the third type, determining that the current wireless charging mode is the second wireless charging mode;

Wherein, the maximum output power of the third type of power supply device is less than the maximum output power of the first type of power supply device and the second type of power supply device, and when the device to be charged is in the When wireless charging is performed in the second charging mode, the power of the electrical energy output by the third-type power supply device is greater than or equal to the charging power required by the second wireless charging mode.
The method according to claim 11, further comprising: in the wireless charging process, according to the current wireless charging mode and the temperature of the battery, determining whether the charging state of the battery satisfies a preset charging Cut-off condition; when the state of charge of the battery satisfies the charge cut-off condition, the charging of the battery is cut off.
The method according to claim 15, further comprising: in the wireless charging process, according to the current wireless charging mode and the temperature of the battery, determining whether the state of charge of the battery whose charging is cut off satisfies A preset charge recovery condition; when the state of charge of the battery meets the charge recovery condition, the battery is recharged.
The method according to claim 11, further comprising: in the wireless charging process, when the information reading signal sent by the wireless receiving circuit is received, receiving the wireless Status information sent by the charging device; the status information includes at least one of the following information: whether the wireless charging device has entered the wireless charging mode determined by the control module, and the wireless charging device is overvoltage Flow information, foreign object detection information.
The method according to claim 17, further comprising: sending control information to the voltage conversion module of the device to be charged according to the status information and the information of the battery sent by the wireless charging device to The output voltage of the wireless receiving circuit is converted.
The method according to claim 11, further comprising: when it is detected that the user starts the reverse charging function, sending a reverse charging enable signal to the load switching module in the device to be charged, so that the A reverse charging channel is opened inside the device to be charged; and the wireless receiving circuit and the voltage conversion module in the device to be charged are configured for reverse charging.
A wireless charging system, comprising: the equipment to be charged, a wireless charging device, and a power supply device according to any one of claims 1-10; wherein the wireless charging device is used to convert the input electric energy Transmit into an electromagnetic signal to wirelessly charge the device to be charged; the power supply device is used to provide the input electric energy for the wireless charging device.