CN109004756B

CN109004756B - Wireless charging system

Info

Publication number: CN109004756B
Application number: CN201810783788.6A
Authority: CN
Inventors: 武小勇
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-07-17
Filing date: 2018-07-17
Publication date: 2021-05-07
Anticipated expiration: 2038-07-17
Also published as: CN109004756A

Abstract

The embodiment of the application provides a wireless charging system, includes: the charging assembly comprises a transmitting coil and a receiving coil, the transmitting coil and the receiving coil are electrically connected through electromagnetic coupling, the transmitting coil is used for radiating electric energy through electromagnetic signals, and the receiving coil is used for receiving the electric energy through the electromagnetic signals; the electronic equipment is connected with the charging assembly and comprises a battery, and the battery is used for storing the electric energy. Among the wireless charging system, because the subassembly and the electronic equipment mutual independence charge, be provided with receiving coil in the subassembly that charges, when electronic equipment carries out wireless charging, the heat that receiving coil produced can pass through the subassembly that charges gives off the external world, can not lead to the fact the influence to electronic equipment, can avoid receiving coil to generate heat and exert an influence to electronic equipment's function to can improve electronic equipment's security and stability.

Description

Wireless charging system

Technical Field

The present application relates to the field of electronic technologies, and in particular, to a wireless charging system.

Background

Currently, electronic devices such as smart phones typically employ rechargeable batteries as the required power source. As the functions of the electronic device are more and more, the power consumption of the electronic device is also more and more. Thus, the frequency with which the user charges the electronic device also increases.

When a user charges the electronic device, the electronic device is usually charged in a wired charging mode, that is, the electronic device is connected to an external power source through a cable. The wired charging method causes inconvenience to users, and therefore some electronic devices provide a wireless charging function.

Disclosure of Invention

The embodiment of the application provides a wireless charging system, which can improve the safety and stability of electronic equipment.

The embodiment of the application provides a wireless charging system, includes:

the charging assembly comprises a transmitting coil and a receiving coil, the transmitting coil and the receiving coil are electrically connected through electromagnetic coupling, the transmitting coil is used for radiating electric energy through electromagnetic signals, and the receiving coil is used for receiving the electric energy through the electromagnetic signals;

the electronic equipment is connected with the charging assembly and comprises a battery, and the battery is used for storing the electric energy.

The embodiment of the application provides a wireless charging system, because the subassembly and the electronic equipment mutual independence charge, be provided with receiving coil in the subassembly that charges, when electronic equipment carries out wireless charging, the heat that receiving coil produced can pass through the subassembly that charges gives off the external world, can not lead to the fact the influence to electronic equipment, can avoid receiving coil to generate heat and exert an influence to electronic equipment's function to can improve electronic equipment's security and stability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is another schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 3 is a cross-sectional view of the electronic device shown in fig. 1 taken along the direction P-P.

Fig. 4 is a schematic structural diagram of a wireless charging system according to an embodiment of the present application.

Fig. 5 is another schematic structural diagram of a wireless charging system according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a wireless charging system according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application.

The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or other devices, or may be a game device, an AR (Augmented Reality) device, an automobile, a data storage device, an audio playing device, a video playing device, a notebook, a desktop computing device, or other devices, or may be a wearable device such as an electronic watch, an electronic glasses, an electronic helmet, an electronic bracelet, an electronic necklace, an electronic garment, or other devices.

Referring to fig. 1 and 3, fig. 3 is a cross-sectional view of the electronic device shown in fig. 1 taken along a direction P-P. The electronic device 10 includes a display screen 11, a middle frame 12, a circuit board 13, a battery 14, a rear cover 15, and an electrical connection portion 16.

Wherein the display screen 11 is mounted on the back cover 15 to form a display surface of the electronic device 10. The display 11 serves as a front housing of the electronic device 10, and forms a receiving space with the rear cover 15 for receiving other electronic components or functional components of the electronic device 10. Meanwhile, the display screen 11 forms a display surface of the electronic device 10 for displaying information such as images, texts, and the like. The Display screen 11 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.

In some embodiments, as shown in FIG. 1, the display screen 11 may include a display area 111 and a non-display area 112. The display area 111 performs a display function of the display screen 11 for displaying information such as images and texts. The non-display area 112 may be used to set functional elements such as a camera, a receiver, and a touch electrode of a display screen. In some embodiments, the non-display area 112 may include at least one area located above and below the display area 111.

In some embodiments, as shown in FIG. 2, the display screen 11 may be a full-face screen. At this time, the display screen 11 may display information in full screen, so that the electronic device 10 has a larger screen occupation ratio. The display screen 11 includes only the display area 111 and no non-display area, or the non-display area is small for the user. At this time, functional components such as a camera and a proximity sensor in the electronic device 10 may be hidden under the display screen 11, and the fingerprint identification module of the electronic device 10 may be disposed on the back of the electronic device 10.

The middle frame 12 may have a thin plate-like or sheet-like structure, or may have a frame structure having a through hole. The middle frame 12 can be accommodated in the accommodating space formed by the display panel 11 and the rear cover 15. The middle frame 12 is used to provide a support function for the whole structure of the electronic device 10, so as to mount the electronic components and functional components in the electronic device 10 together to form a complete electronic device. For example, functional components such as a camera, a receiver, a circuit board, and a battery in the electronic apparatus 10 may be mounted on the center frame 12 for fixation.

The circuit board 13 is mounted inside the housing space. For example, the circuit board 13 may be mounted on the middle frame 12 and received in the receiving space together with the middle frame 12. The circuit board 13 may be a motherboard of the electronic device 10. Wherein the processor of the electronic device 10 may be arranged on the circuit board 13. One, two or more of the functional components such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera, a distance sensor, an ambient light sensor, a gyroscope, etc. may also be integrated on the circuit board 13. Meanwhile, the display screen 11 may be electrically connected to the circuit board 13.

The battery 14 is mounted in the housing space. For example, the battery 14 may be mounted on the middle frame 12 and be accommodated in the accommodating space together with the middle frame 12. The battery 14 may be electrically connected to the circuit board 13 to enable the battery 14 to power the electronic device 10. Wherein, the circuit board 13 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by battery 14 to the various electronic components in electronic device 10.

The rear cover 15 is used to form the outer contour of the electronic device 10. The rear cover 15 may be integrally formed. In the forming process of the rear cover 15, structures such as a rear camera hole and a fingerprint identification module mounting hole can be formed on the rear cover 15.

In some embodiments, the back cover 15 may be a metal back cover, such as a metal such as magnesium alloy, stainless steel, or the like. It should be noted that the material of the rear cover 15 in the embodiment of the present application is not limited to this, and other methods may also be adopted, for example, the rear cover 15 may be a plastic rear cover, and for example, the rear cover 15 may be a ceramic rear cover. For another example, the rear cover 15 may include a plastic portion and a metal portion, and the rear cover 15 may be a rear cover structure in which metal and plastic are engaged with each other. Specifically, the metal part may be formed first, for example, a magnesium alloy substrate is formed by injection molding, and then plastic is injected on the magnesium alloy substrate to form a plastic substrate, so as to form a complete rear cover structure.

With continued reference to fig. 1 and 2, the electronic device 10 also includes electrical connections 16. Wherein the electrical connection 16 may be disposed at a side of the electronic device 10. For example, the electrical connection 16 may be disposed on a bottom side of the electronic device 10. The electrical connection portion 16 is electrically connected to the battery 14. The electrical connection 16 is used to connect a charging device to charge the battery 14.

In some embodiments, the electrical connection 16 may also be connected to the circuit board 13. The charging process of the battery 14 can thus be controlled by a processor arranged on said circuit board 13.

The embodiment of the application also provides a wireless charging system. The wireless charging system is applied to the electronic device 10, so that the battery 14 in the electronic device 10 is charged through the wireless charging system.

In some embodiments, referring to fig. 4, the wireless charging system 100 includes an electronic device 10 and a charging assembly 20. The electronic device 10 is connected to the charging assembly 20.

Wherein, the charging component 20 can be used alone as an accessory of the electronic device 10. That is, the charging assembly 20 may be connected to the electronic device 10 or disconnected from the electronic device 10 without affecting the normal function of the electronic device 10. For example, the charging assembly 20 may be a charging base to which the electronic device 10 is connected to enable charging.

The charging assembly 20 includes a transmitting coil 21 and a receiving coil 22. The transmitting coil 21 and the receiving coil 22 are electrically connected through electromagnetic coupling. That is, the transmitting coil 21 and the receiving coil 22 are spaced apart from each other, and are not directly connected but electrically connected by electromagnetic coupling.

Wherein the transmitting coil 21 is used for radiating electrical energy by means of electromagnetic signals. The receiving coil 22 is used for receiving the electric energy through an electromagnetic signal. For example, when the electronic device 10 is charged, the transmitting coil 21 radiates electric energy to the outside by a high-frequency electromagnetic signal, and the receiving coil 22 receives the electric energy radiated to the outside by the transmitting coil 21 by an electromagnetic signal, thereby charging the electronic device 10.

It will be appreciated that since the electromagnetic signal is a high frequency ac signal, the electrical energy received by the receiving coil 22 is an ac signal.

The transmitting coil 21 and the receiving coil 22 are metal-wound coils. For example, the transmitting coil 21 and the receiving coil 22 may be both copper wire-wound coils.

In some embodiments, the efficiency of the receiving coil 22 in receiving electrical energy via electromagnetic signals is greater than 80%. That is, the ratio between the electric energy received by the receiving coil 22 through the electromagnetic signal and the electric energy radiated by the transmitting coil 21 through the electromagnetic signal is greater than 80%. Therefore, when the electronic device 10 is charged in a wireless manner, the charging efficiency of the electronic device 10 can be ensured.

The electronic device 10 supports a wireless charging function, that is, the electronic device 10 can perform wireless charging. The electronic device 10 includes a battery 14. The battery 14 is used for storing the electric energy received by the receiving coil 22. Furthermore, the battery 14 is used to provide power to the electronic device 10 when the electronic device 10 is not in a charging state.

In the embodiment of the present application, because charging assembly 20 and electronic device 10 are mutually independent, be provided with receiving coil 22 in charging assembly 20, when electronic device 10 carries out wireless charging, the heat that receiving coil 22 produced can pass through charging assembly 20 gives off the external world, can not lead to the fact the influence to electronic device 10, can avoid receiving coil 22 to generate heat and exert an influence to electronic device 10's function to can improve electronic device 10's security and stability.

In some embodiments, with continued reference to fig. 4, the charging assembly 20 is provided with a first electrical connection 23. The receiving coil 22 is connected to the first electrical connection 23. A second electrical connection 16 is provided on the electronic device 10. The battery 14 is connected to the second electrical connection 16. The second electrical connection portion 16 is the electrical connection portion 16 in the electronic device 10.

The shape and size of the second electrical connection portion 16 are respectively matched with the shape and size of the first electrical connection portion 23, so that the second electrical connection portion 16 can be connected with the first electrical connection portion 23 to realize the connection between the electronic device 10 and the charging assembly 20.

In some embodiments, the first electrical connection 23 comprises a first conductive contact. The first conductive contact is connected to a receiving coil 22 in the charging assembly 20. The second electrical connection 16 comprises a first conductive dome. The shape and the size of the first conductive elastic sheet are matched with those of the first conductive contact piece respectively, so that the first conductive elastic sheet can be connected with the first conductive contact piece. In addition, the first conductive elastic sheet is also connected with a battery 14 in the electronic device 10.

For example, the first electrical connection portion 23 may include a first conductive contact that is a "gold finger". The "gold finger" refers to a computer hardware structure composed of golden yellow conductive contact pieces, and is called as a "gold finger" because the surface of the gold finger is plated with gold and the conductive contact pieces are arranged like fingers. The golden finger can be used for realizing the connection between the memory bank and the memory slot in the computer.

The first conductive clip included in the second electrical connection 16 may be a pogo pin connector. The pogo pin connector can be widely applied to precise connection in electronic products.

In some embodiments, the first electrical connection 23 includes at least two first conductive contacts. For example, the first electrical connection 23 may include 2, 3, or 4 first conductive contacts, and so on. Wherein the first electrical connection portion 23 includes a plurality of first conductive contact pieces spaced apart from each other.

The number of the first conductive elastic pieces included in the second electrical connection portion 16 is also at least two. For example, the second electrical connection 16 may include 2, 3, or 4 first conductive clips, and so on. The second electrical connection portion 16 includes a plurality of first conductive elastic pieces spaced apart from each other. Each first conductive elastic sheet is connected with one first conductive contact piece.

In some embodiments, the first electrical connection 23 comprises a second conductive dome. The second conductive elastic sheet is connected with the receiving coil 22 in the charging assembly 20. The second electrical connection 16 comprises a second electrically conductive contact. The shape and the size of the second conductive elastic sheet are respectively matched with those of the second conductive contact piece, so that the second conductive contact piece can be connected with the second conductive elastic sheet. In addition, the second conductive contact is also connected to a battery 14 in the electronic device 10.

For example, the second conductive clip included in the first electrical connection portion 23 may be a pogo pin connector. The second electrical connection 16 may include a second conductive contact that may be a "gold finger".

In some embodiments, the first electrical connection portion 23 includes at least two second conductive clips. For example, the first electrical connection portion 23 may include 2, 3, or 4 second conductive clips, and so on. Wherein, the plurality of second conductive elastic pieces included in the first electrical connection portion 23 are arranged at intervals.

The second electrical connection 16 also includes at least two second conductive contacts. For example, the second electrical connection 16 may include 2, 3, or 4 second conductive contacts, and so on. Wherein the second electrical connection portion 16 includes a plurality of second conductive contact pieces spaced apart from each other. Each second conductive contact piece is connected with one second conductive elastic piece.

In some embodiments, as shown in FIG. 5, the electronic device 10 also includes a wireless receiver 17. The wireless receiver 17 is connected to the charging assembly 20 and the battery 14 in the electronic device 10. The wireless receiver 17 is used for converting an alternating current signal into a direct current signal. Wherein the wireless receiver 17 may comprise a rectifying circuit.

For example, the receiving coil 22 in the charging unit 20 receives the high-frequency electric signal and outputs the received high-frequency electric signal to the electronic device 10. The wireless receiver 17 in the electronic device 10 converts the high-frequency electric signal into a direct-current electric signal, and then outputs to the battery 14 for charging.

In some embodiments, as shown in FIG. 5, the electronic device 10 also includes a charge controller 18. The charge controller 18 is connected to the wireless receiver 17 and the battery 14, respectively. Thus, the wireless receiver 17 is connected to the battery 14 through the charge controller 18. The charge controller 18 is configured to control a charging voltage and a charging current of the battery 14.

For example, the charge controller 18 may adjust the charging voltage and charging current of the battery 14 during different charging phases of the electronic device 10 to achieve better charging efficiency of the battery 14.

In addition, the charging controller 18 may also supply power to other electronic components or functional components of the electronic device 10 during charging of the electronic device 10. For example, power may be supplied to functional components of the electronic device 10, such as circuit boards, display screens, etc.

In some embodiments, as shown in fig. 5, the charging assembly 20 further includes a wireless transmitter 24. The wireless transmitter 24 is connected to the transmitting coil 21. The wireless transmitter 24 is used to convert a low frequency ac signal or dc signal into a high frequency electrical signal.

For example, the charging assembly 20 may be connected to an external power source, such as the mains, and the external power source may output a low-frequency ac signal (e.g., the mains is 50Hz ac). The wireless transmitter 24 may convert a low-frequency ac signal output from an external power source into a high-frequency electric signal, for example, a high-frequency signal of 1500MHz, so that the transmitting coil 21 may radiate electric energy to the outside by an electromagnetic signal.

In some embodiments, as shown in fig. 5, the charging assembly 20 further includes a control circuit 25. The control circuit 25 is connected to the wireless transmitter 24. The control circuit 25 is used to control the wireless transmitter 24, for example, the output frequency of the wireless transmitter 24 can be controlled, so that the wireless transmitter 24 can convert a low-frequency ac signal into a high-frequency electric signal with a different frequency.

In some embodiments, as shown in fig. 6, the charging assembly 20 includes at least two transmitting coils 21. The at least two transmitting coils 21 are connected in parallel. In other embodiments, the charging assembly 20 may further include more transmitting coils, such as 3, 4, etc. Wherein, each of the transmitting coils 21 can be connected with a conversion chip. The conversion chip is used for converting the direct current signal into a high-frequency alternating current signal.

Wherein, each of the transmitting coils 21 is electrically connected with the receiving coil 22 through electromagnetic coupling. Thus, when the electronic device 10 is charged, electric energy can be radiated by the plurality of transmitting coils 21 to improve the charging efficiency of the electronic device 10.

In some embodiments, as shown in fig. 6, the charging assembly 20 includes at least two receiving coils 22. The at least two receiving coils 22 are connected in parallel. In other embodiments, the charging assembly 20 may further include more receiving coils, such as 3, 4, etc.

Wherein, each receiving coil 22 is electrically connected with the transmitting coil 21 through electromagnetic coupling. Accordingly, when the electronic device 10 is charged, the power can be received by the plurality of receiving coils 22, so that the charging efficiency of the electronic device 10 is improved.

The wireless charging system provided by the embodiment of the present application is described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A wireless charging system, comprising:

the charging assembly is provided with a first electric connection part and comprises at least two transmitting coils connected in parallel and at least two receiving coils connected in parallel, the number of the transmitting coils is the same as that of the receiving coils, one transmitting coil is electrically connected with one receiving coil through electromagnetic coupling, the transmitting coils are used for radiating electric energy through electromagnetic signals, the receiving coils are used for receiving the electric energy through the electromagnetic signals, and the first electric connection part is directly connected with each receiving coil;

electronic equipment, be provided with the second electricity connecting portion on the electronic equipment, the shape and the size of second electricity connecting portion respectively with the shape and the size looks adaptation of first electricity connecting portion, so that the second electricity connecting portion with first electricity connecting portion lug connection, electronic equipment includes battery, wireless receiver and charge controller, wireless receiver with the second electricity connecting portion and charge controller connects respectively for convert alternating current signal into direct current signal, charge controller with wireless receiver and the battery is connected respectively, is used for right the charging voltage and the charging current of battery control, the battery is used for storing the electric energy.

2. The wireless charging system of claim 1, wherein the first electrical connection comprises a first conductive contact that is directly connected to the receiving coil;

the second electric connection part comprises a first conductive elastic sheet which is respectively connected with the first conductive contact sheet and the wireless receiver.

3. The wireless charging system of claim 2, wherein the number of the first conductive contacts is at least two, and the number of the first conductive clips is at least two, and each of the first conductive clips is connected to one of the first conductive contacts.

4. The wireless charging system of claim 1, wherein the first electrical connection comprises a second conductive dome that is directly connected to the receive coil;

the second electric connection part comprises a second conductive contact piece, and the second conductive contact piece is connected with the second conductive elastic piece and the wireless receiver respectively.

5. The wireless charging system of claim 4, wherein the number of the second conductive tabs is at least two, and each of the second conductive tabs is connected to one of the second conductive tabs.

6. The wireless charging system of any one of claims 1 to 5, wherein the charging assembly comprises at least two transmitting coils, the at least two transmitting coils are connected in parallel, and each transmitting coil is electrically connected with the receiving coil through electromagnetic coupling.

7. The wireless charging system of any one of claims 1 to 5, wherein the charging assembly comprises at least two receiving coils, the at least two receiving coils are connected in parallel, and each receiving coil is electrically connected with the transmitting coil through electromagnetic coupling.

8. The wireless charging system of any one of claims 1 to 5, wherein the efficiency of the receiving coil receiving the electrical energy via an electromagnetic signal is greater than 80%.