TWI880330B - Wireless charging method and device - Google Patents

Abstract

A wireless charging method includes obtaining the state of health of the target device; when the state of health is not less than the preset state of health, charging the target device at the first power; and charging the target device at the second power less than the first power when the state of health is less than the preset state of health.

Description

Wireless charging method and device

The present invention relates to a wireless charging method and device.

The applications of Near Field Communication (NFC) in wireless charging mainly include NFC wireless charger location tracking, NFC wireless charger automatic switching, NFC wireless charger multi-purpose function, NFC wireless charger security control and NFC wireless charger interactive function. In the application of near field wireless communication, antennas are usually used as components for sending and receiving wireless signals, and antennas are used to achieve data transmission between wireless chargers and charged devices.

However, current wireless charging devices usually directly use a short-range wireless communication antenna to obtain the charging information of the device when charging the device, and then charge the device according to the charging power corresponding to the charging information of the device. In this way, if the battery health of the device is low, charging the device directly according to the charging information will cause problems such as reduced battery life, battery overheating, battery overcharging and battery combustion.

In view of the above, the present invention provides a wireless charging method and device.

According to an embodiment of the present invention, a wireless charging device includes a charging module, a signal acquisition module and a control module, wherein the control module is connected to the charging module and the signal acquisition module. The wireless charging device is used to wirelessly charge a target device. The signal acquisition module is used to obtain the battery health of the target device. The control module is used to determine whether the battery health is less than a preset health. When the battery health is not less than the preset health, the charging module is controlled to charge the target device with a first power, and when the battery health is less than the preset health, the charging module is controlled to charge the target device with a second power that is less than the first power.

A wireless charging method according to an embodiment of the present invention includes: obtaining a battery health of a target device; determining whether the battery health is less than a preset health; when the battery health is not less than the preset health, charging the target device with a first power; and when the battery health is less than the preset health, charging the target device with a second power that is less than the first power.

Through the above structure, the wireless charging method and device disclosed in this case obtain the battery health of the target device to determine whether the battery health is less than the preset health. When the battery health of the target device is less than the preset health, the target device is charged with a charging power that is less than the charging power originally applicable to the target device. In this way, compared with the wireless charging method and device that does not adjust the charging strategy according to the battery health of the target device, the wireless charging method and device disclosed in this case can delay battery degradation and thereby increase battery life, and reduce the possibility of overcharging and overheating.

The above description of the disclosed content and the following description of the implementation methods are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

The following detailed description of the features and advantages of the present invention is provided in the implementation mode, and the content is sufficient to enable any person skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. Moreover, according to the content disclosed in this specification, the scope of the patent application and the drawings, any person skilled in the relevant art can easily understand the relevant purposes and advantages of the present invention. The following embodiments are to further explain the viewpoints of the present invention in detail, but are not to limit the scope of the present invention by any viewpoint.

Please refer to FIG. 1 , which is a functional block diagram of a wireless charging device according to an embodiment of the present invention. As shown in FIG. 1 , the wireless charging device 1 includes a charging module 11 , a signal acquisition module 12 , and a control module 13 , wherein the control module 13 is connected to the charging module 11 and the signal acquisition module 12 .

The charging module 11 is used to wirelessly charge the target device, such as a mobile phone or other electronic device with a wireless charging function. The charging module 11 may include a short-range wireless communication antenna 111 and a charging coil 112. Specifically, the charging module 11 may perform wireless communication via the short-range wireless communication antenna 111, and may charge the target device via the charging coil 112.

The signal acquisition module 12 is used to obtain the battery health of the target device. Specifically, the signal acquisition module 12 may include a short-range wireless communication chip 121 connected to the short-range wireless communication antenna 111 of the charging module 11 and the control module 13. Furthermore, the short-range wireless communication chip 121 may receive a signal including the battery health of the target device from the target device via the short-range wireless communication antenna 111.

The control module 13 may include a microcontroller 131 and a charging controller 132, wherein the microcontroller 131 is connected to the charging controller 132 and the short-range wireless communication chip 121 of the signal acquisition module 12, and the charging controller 132 is connected to the charging coil 112 of the charging module 11. The microcontroller 131 is used to determine whether the battery health is less than a preset health, and when the battery health is not less than the preset health, the charging controller 132 controls the charging module 11 to charge the target device with a first power, and when the battery health is less than the preset health, the charging module 11 is controlled to charge the target device with a second power less than the first power. Specifically, the first power may be the power size and specification currently required by the target device reported through the Qi protocol, such as the extended power profile (EPP), and the second power may be the power that complies with the baseline power profile (BPP). In other words, when the battery health of the target device is normal, the control module 13 may control the charging module 12 to charge the target device according to the original specification of the target device, and when the battery health of the target device is in a low standard state, the control module 13 adopts a lower power charging strategy.

Qi protocol is a wireless charging standard developed by the Wireless Power Consortium (WPC). Its main purpose is to avoid safety and compatibility issues in the use of wireless charging products. With the popularity of wireless charging products, the market's requirements for charging efficiency have also greatly increased. Therefore, when developing the Qi wireless charging standard, WPC defined the baseline power specification and extended power specification according to the output power. The baseline power specification supports 5 watts (W) of power transmission, and the extended power specification supports power transmission in the power range greater than 5W and less than 30W.

Please refer to FIG. 1 and FIG. 2 , FIG. 2 is a flow chart of a wireless charging method according to an embodiment of the present invention. As shown in FIG. 2 , the wireless charging method includes step S11: obtaining the battery health of the target device; step S12: determining whether the battery health is less than a preset health; when the determination result of step S12 is "no", executing step S13: charging the target device with a first power; and when the determination result of step S12 is "yes", executing step S14: charging the target device with a second power less than the first power. The above-mentioned wireless charging method can be applied to the wireless charging device 1 shown in FIG. 1 , and the wireless charging method shown in FIG. 2 is exemplarily described below using the wireless charging device 1 shown in FIG. 1 .

In step S11, the microcontroller 131 obtains the battery health of the target device. Specifically, the battery health can be obtained through short-distance wireless communication technology. Further, the battery health of the target device can be obtained by connecting the short-distance wireless communication chip 121 and the short-distance wireless communication antenna 111 provided in the charging module 11 to obtain the battery health signal transmitted from the target device.

In step S12, the microcontroller 131 determines whether the battery health is less than a preset health. Specifically, when the determination result of step S12 is that the battery health is not less than the preset health, step S13 is executed, and when the determination result of step S12 is that the battery health is less than the preset health, step S14 is executed. Further, the preset health can be 20%.

In step S13, the charging module 11 charges the target device with a first power. Specifically, the microcontroller 131 can control the charging coil 112 provided in the charging module 11 to charge the target device with the first power. Furthermore, the first power can meet the current required power size and specification (such as EPP) reported by the target device through the Qi protocol.

In step S14, the charging module 11 charges the target device with a second power less than the first power. Specifically, the microcontroller 131 can control the charging coil 112 provided in the charging module 11 to charge the target device with a second power less than the first power. Further, the second power can meet the BPP.

Please refer to FIG. 1 and FIG. 3 , FIG. 3 is a flow chart of obtaining target device system information of a wireless charging method according to an embodiment of the present invention. As shown in FIG. 3 , in addition to steps S11 to S14, the wireless charging method further includes executing step S21 before step S11: initialization; step S22: determining whether there is a sensing signal; when the determination result of step S22 is "yes", executing step S23: obtaining target device system information; and when the determination result of step S12 is "no", executing step S21 and step S22 again.

In step S21 and step S22, the microcontroller 131 is initialized and determines whether there is a sensing signal. Specifically, when the determination result of step S22 is that the short-range wireless communication antenna 111 senses a signal, step S23 is executed. When the determination result of step S22 is that the short-range wireless communication antenna 111 does not sense a signal, step S21 and the steps subsequent to step S21 are executed again.

In step S23, the microcontroller 131 obtains the system information of the target device. Specifically, the system information of the target device can be obtained through the signal acquisition module 12, that is, the system information of the target device can be obtained by connecting the short-range wireless communication chip 121 provided in the signal acquisition module 12 and the short-range wireless communication antenna 111 provided in the charging module 11 to obtain the system information transmitted from the target device. Further, after obtaining the system information of the target device, the battery health of the target device can be obtained using the preset reading method corresponding to the system information. Furthermore, the system information may indicate the type of system software of the target device. Taking a mobile device as an example, the system information may indicate its mobile operating system, such as an Android operating system or an IOS operating system.

In one or more embodiments of the present invention, the wireless charging method and device of the present invention can be applied to vehicle-mounted devices, such as autonomous vehicles, electric vehicles, or semi-autonomous vehicles, etc.

Through the above structure, the wireless charging method and device disclosed in this case obtain the battery health of the target device to determine whether the battery health is less than the preset health. When the battery health of the target device is less than the preset health, the target device is charged with a charging power that is less than the charging power originally applicable to the target device. In this way, compared with the wireless charging method and device that does not adjust the charging strategy according to the battery health of the target device, the wireless charging method and device disclosed in this case can delay battery degradation and thereby increase battery life, and reduce the possibility of overcharging and overheating.

Although the present invention is disclosed as above with the aforementioned embodiments, it is not intended to limit the present invention. Any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

1: Wireless charging device 11: Charging module 111: Short-range wireless communication antenna 112: Charging coil 12: Signal acquisition module 121: Short-range wireless communication chip 13: Control module 131: Microcontroller 132: Charging controller S11, S12, S13, S14, S21, S22, S23: Steps

FIG. 1 is a functional block diagram of a wireless charging device according to an embodiment of the present invention. FIG. 2 is a flow chart of a wireless charging method according to an embodiment of the present invention. FIG. 3 is a flow chart of obtaining target device system information of a wireless charging method according to an embodiment of the present invention.

S11, S12, S13, S14: Steps

Claims (10)

A wireless charging method, performed by a wireless charging device, includes: Determining whether there is a sensing signal; When it is determined that there is the sensing signal, obtaining a system information of a target device; Obtaining a battery health of the target device; Determining whether the battery health is less than a preset health; When the battery health is not less than the preset health, charging the target device with a first power; and When the battery health is less than the preset health, charging the target device with a second power less than the first power. A wireless charging method as described in claim 1, wherein the battery health of the target device is obtained using a default reading method corresponding to the system information. A wireless charging method as described in claim 1, wherein the battery health is obtained through short-range wireless communication technology. A wireless charging method as described in claim 1, wherein the second power complies with a baseline power profile (BPP). A wireless charging method as described in claim 1, wherein the default health level is 20%. A wireless charging device for wirelessly charging a target device comprises: a charging module; a signal acquisition module, which, when receiving a sensing signal, obtains system information of the target device and is used to obtain a battery health of the target device; and a control module, connected to the charging module and the signal acquisition module, for determining whether the battery health is less than a preset health, and when the battery health is not less than the preset health, controlling the charging module to charge the target device with a first power, and when the battery health is less than the preset health, controlling the charging module to charge the target device with a second power less than the first power. A wireless charging device as described in claim 6, wherein the signal acquisition module obtains the battery health of the target device using a default reading method corresponding to the system information. A wireless charging device as described in claim 6, wherein the charging module includes a short-range wireless communication antenna, and the signal acquisition module includes: A short-range wireless communication chip connected to the short-range wireless communication antenna and the control module, used to receive a signal including the battery health status from the target device via the short-range wireless communication antenna. A wireless charging device as described in claim 6, wherein the second power complies with a baseline power profile (BPP). A wireless charging device as described in claim 6, wherein the default health level is 20%.

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