CN104917266A - A car emergency starter power supply with multi-gear wireless charging function - Google Patents

Abstract

The invention relates to the technical field of automobile emergency starting power supplies, and provides an automobile emergency starting power supply with a multi-gear wireless charging function, wherein a Micro Control Unit (MCU) sends a detection pulse A and a detection pulse B to a bridge type wireless transmission driving circuit A and a bridge type wireless transmission driving circuit B respectively; the detection pulse A and the detection pulse B are converted into magnetic field signals through the wireless transmitting coil A and the wireless transmitting coil B respectively and transmitted out; the decoding detection circuit module A detects the current in the bridge type wireless transmission driving circuit A through a corresponding detection port; when the current exceeds a preset threshold value, confirming that the current equipment to be charged is suitable for a bridge type wireless transmission driving circuit A; and driving the wireless transmitting coil A to continuously transmit magnetic field energy to complete charging of the equipment to be charged. The invention overcomes the defect that the prior art can only provide single wireless charging, and provides a multi-gear wireless charging implementation method.

Description

A car emergency starter power supply with multi-gear wireless charging function

【Technical field】

The invention relates to the technical field of automobile emergency starting power supply, in particular to an automobile emergency starting power supply with multi-gear wireless charging function.

【Background technique】

The principle of wireless charging is that the alternating current of a certain frequency in the primary coil generates a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmitting end to the receiving end.

At present, the most common charging solution uses electromagnetic induction. China's local BYD company, as early as December 2005, applied for a patent for a non-contact inductive charger, which used electromagnetic induction technology.

At present, in the field of emergency start-up power supplies for automobiles, the wireless charging functions that can be provided are all for single-power devices, and it is impossible to provide multi-level wireless charging functions for devices with different power requirements.

【Content of invention】

The technical problem to be solved by the present invention is how to overcome the deficiency that the wireless charging functions provided in the prior art are all aimed at single-power devices.

In order to solve the technical problem, the present invention provides a car emergency starter power supply with multi-gear wireless charging function, including a micro control unit MCU, a decoding detection circuit module A, a decoding detection circuit module B, a bridge wireless transmission drive circuit A , bridge type wireless transmission drive circuit B, wireless transmission coil A, wireless transmission coil B, wherein, the detection port of the bridge type wireless transmission drive circuit A is connected to the decoding detection circuit module A, and the output port of the decoding detection circuit module A Connect the micro control unit MCU; the drive port of the bridge wireless transmission drive circuit A is connected to the control port A of the micro control unit MCU; the output port of the bridge wireless transmission drive circuit A is connected to the wireless transmission coil A; Specifically: the detection port of the bridge wireless transmission drive circuit B is connected to the decoding detection circuit module B, and the output port of the decoding detection circuit module B is connected to the micro control unit MCU; the bridge wireless transmission drive circuit The drive port B of B is connected to the control port B of the micro control unit MCU; the output port of the bridge wireless transmission drive circuit B is connected to the wireless transmission coil B; specifically, the micro control unit MCU controls the port A and the control port B send the detection pulse A and the detection pulse B to the bridge wireless transmission drive circuit A and the bridge wireless transmission drive circuit B respectively; the detection pulse A and the detection pulse B pass through the wireless transmission coil A and the The wireless transmitting coil B is converted into a magnetic field signal and transmitted; the decoding detection circuit module A detects the current of the bridge wireless transmitting drive circuit A after driving the wireless transmitting coil A to transmit the magnetic field signal through the corresponding detection port When the magnitude of the current exceeds the preset threshold, confirm that the current device to be charged is suitable for the bridge-type wireless transmission drive circuit A; drive the wireless transmission coil A through the bridge-type wireless transmission drive circuit A continuously The energy of the magnetic field is emitted to complete the charging of the device to be charged.

Preferably, the detection pulse A and the detection pulse B are sent by the micro control unit MCU according to a specified cycle.

Preferably, when the bridge type wireless transmission drive circuit A drives the wireless transmission coil A to continuously transmit magnetic field energy to complete the charging of the device to be charged, it also includes:

The micro control unit MCU keeps sending the detection pulse B for the wireless transmitting coil B according to the specified cycle.

Preferably, the specified period is specifically: 500ms, and the 500ms includes: the time for the detection pulse A and the time for the micro control unit MCU to process the current output by the decoding detection circuit module A.

Preferably, the control port A of the micro control unit MCU is connected to the drive port of the bridge wireless transmission drive circuit A to generate an AC voltage for the wireless transmission coil A, specifically:

The drive port of the bridge wireless transmission driving circuit A includes a drive port 1 and a drive port 2, and the control port A of the micro control unit MCU includes an uplink control port A1 and a downlink control port A2. In the circuit A, the drive port 1 and the drive port 2 are respectively connected to the bases of the semiconductor transistors PNP and NPN, and the collector of the semiconductor transistor PNP is connected to the collector of the semiconductor transistor NPN, and serves as the wireless transmission drive circuit The output port of A is connected to the wireless transmitting coil A; in a static working state, the semiconductor triode PNP and NPN are turned on; when the micro control unit MCU inputs a high level through the uplink control port A1, the semiconductor The collector of the triode PNP outputs a forward voltage; when the micro-control unit MCU inputs a high level through the downlink control port A2, the collector of the semiconductor triode NPN outputs a reverse voltage; the micro-control unit MCU controls Outputting the forward voltage and the reverse voltage in turn, generating the detection pulse A and/or generating a signal for driving the wireless transmitting coil A to continuously transmit magnetic field energy.

Preferably, the semiconductor triode can specifically be replaced by a field effect transistor.

Preferably, the decoding detection circuit module A is a voltage amplifier composed of an integrated power amplifier, then the detection port of the bridge wireless transmission drive circuit A is connected to the decoding detection circuit module A, and the output port of the decoding detection circuit module A is connected to The micro control unit MCU specifically includes: the input port of the voltage amplifier is connected to the detection port of the bridge wireless transmission drive circuit A; the output port of the voltage amplifier is connected to the decoding input port of the micro control unit MCU.

Preferably, the car emergency start power supply also includes a status indicator light, specifically: the micro control unit MCU is connected to a charging indicator light and an error indicator light; , receiving the control signal of the micro-control unit to complete the corresponding status display; the error indicator light is used to receive the control signal of the micro-control unit to complete the corresponding status display when a non-rechargeable object is placed.

Preferably, the micro control unit MCU is further configured to, according to the decoding detection circuit module A, stop inputting a drive signal to the bridge wireless transmission drive circuit A after detecting that the device to be charged is fully charged, thereby stopping the The wireless transmitting coil A transmits magnetic field energy.

Preferably, according to the decoding detection circuit module A, it is detected that the device to be charged is fully charged, which specifically includes:

The magnetic field energy receiving device in the device to be charged generates a reverse magnetic field after the battery in the device to be charged is fully charged, and acts on the wireless transmitting coil; When the corresponding current changes, it is confirmed that the device to be charged is fully charged, and then stop inputting the driving signal to the bridge wireless transmission driving circuit A.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention overcomes the deficiency that the prior art can only provide single wireless charging, and provides a method for realizing multi-level wireless charging.

【Description of drawings】

Fig. 1 is a schematic structural diagram of a car emergency starter power supply with multi-gear wireless charging function provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a micro control unit MCU provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a wireless transmission driving circuit provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a decoding detection circuit module provided by an embodiment of the present invention;

5 is a schematic structural diagram of a current detection module provided by an embodiment of the present invention;

6 is a schematic structural diagram of a status indicator light provided by an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a status reminder provided by an embodiment of the present invention.

【Detailed ways】

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

The present invention provides schematic diagrams of partial circuit structures as shown in accompanying drawings 2 to 7. Due to double considerations of space and clarity, each of the accompanying drawings is a partial structure intercepted from a complete circuit diagram. In order to easily understand the interface connection relationship, The fractures that describe the same identifier in the figure all indicate that they are connected to each other, for example: the UP_A interface in Figure 2 and the UP_A circuit line in Figure 3 are connected together in the complete circuit diagram.

Example 1:

Embodiment 1 of the present invention provides a car emergency starter power supply with multi-gear wireless charging function, which is characterized in that it includes a micro control unit MCU, a decoding detection circuit module A, a decoding detection circuit module B, and a bridge wireless transmission drive circuit A, bridge type wireless transmission drive circuit B, wireless transmission coil A, wireless transmission coil B, as shown in Figure 1, the detection port of the bridge type wireless transmission drive circuit A is connected to the decoding detection circuit module A, the decoding detection circuit The output port of the module A is connected to the micro control unit MCU; the drive port A of the bridge wireless transmission drive circuit A is connected to the control port A of the micro control unit MCU; the output port of the bridge wireless transmission drive circuit A Connect the wireless transmitting coil A;

The detection port of the bridge wireless transmission drive circuit B is connected to the decoding detection circuit module B, and the output port of the decoding detection circuit module B is connected to the micro control unit MCU; the drive port B of the bridge wireless transmission drive circuit B Connect the control port B of the micro control unit MCU; the output port of the bridge wireless transmission drive circuit B is connected to the wireless transmission coil B;

Specifically, the micro control unit MCU sends a detection pulse A and a detection pulse B to the bridge wireless transmission driving circuit A and the bridge wireless transmission driving circuit B through the control port A and the control port B respectively;

The detection pulse A and the detection pulse B are converted into magnetic field signals and transmitted via the wireless transmitting coil A and the wireless transmitting coil B respectively;

The decoding detection circuit module A detects the magnitude of the current of the bridge wireless transmission drive circuit A after driving the wireless transmission coil A to transmit the magnetic field signal through the corresponding detection port;

When the magnitude of the current exceeds the preset threshold, confirm that the device currently to be charged is suitable for the bridge wireless transmission drive circuit A;

The wireless transmitting coil A is driven by the bridge type wireless transmitting drive circuit A to continuously transmit magnetic field energy to complete the charging of the device to be charged.

The invention overcomes the deficiency that the prior art can only provide single wireless charging, and provides a method for realizing multi-level wireless charging.

In combination with this embodiment, there is a preferred solution, the detection pulse A and the detection pulse B are sent by the micro control unit MCU according to a specified cycle.

In combination with this embodiment, there is a preferred solution, in which the wireless transmitting coil A is driven by the bridge type wireless transmitting drive circuit A to continuously emit magnetic field energy to complete the charging of the device to be charged, and also includes:

The micro control unit MCU keeps sending the detection pulse B for the wireless transmitting coil B according to the specified cycle.

In combination with this embodiment, there is a preferred solution, the specified period is specifically: 500ms, and the 500ms includes: the time of the detection pulse A and the processing of the output of the decoding detection circuit module A by the micro control unit MCU current time. Optionally, the detection pulse A and the detection pulse B are transmitted sequentially, thereby avoiding mutual interference.

In each embodiment of the present invention, "A" and "B" in the titles of the bridge type wireless transmission driving circuit A and the bridge type wireless transmission driving circuit B are only for the convenience of description, clear and practical, and do not refer to the bridge type wireless transmission driving circuit A. Or the scope of the bridge-type wireless transmission drive circuit B itself is specially limited, and, in addition to the relationship between the two, the difference on the wireless transmission coil, and how the micro-control unit MCU coordinates the operation of the two, for the bridge-type wireless transmission drive circuit There is not much difference in the implementation of B itself, therefore, there is no substantial difference in the implementation content. For the sake of brevity, the present invention mainly focuses on the description from the side of the bridge wireless transmission drive circuit A. Those skilled in the art can according to the disclosure of each embodiment The content is based on the disclosed relationship between the bridge type wireless transmission driving circuit A and the bridge type wireless transmission driving circuit B to realize a complete solution, which will not be repeated here.

Example 2:

Embodiment 1 provides the structural relationship of a car emergency start power supply with multi-gear wireless charging function proposed by the present invention. Embodiment 2 will further provide a micro control unit based on the disclosure of Embodiment 1. The connection relationship between the MCU and the bridge wireless transmission drive circuit, wherein the micro control unit MCU is specifically a chip DW540, or a wireless charging control chip with a function similar to the chip DW540, and the control port A of the micro control unit MCU It is connected to the driving port of the bridge wireless transmitting drive circuit A to generate an AC voltage for the wireless transmitting coil A, as shown in Figure 2 and Figure 3, specifically:

The drive port of the bridge wireless transmission drive circuit A includes a drive port 1 (as shown in UP_A in Figure 3) and a drive port 2 (as shown in DOWN_A in Figure 3), and the control port A of the micro control unit MCU includes Uplink control port A1 (as shown in UP_A in Figure 2) and downlink control port A2 (as shown in DOWN_A in Figure 2), in the bridge wireless transmission drive circuit A, the drive port 1 and drive port 2 are respectively Connect the base of semiconductor transistor PNP (as shown in Q1 among Figure 3) and NPN (as shown in Q3 among Figure 3), the collector of described semiconductor transistor PNP connects the collector of described semiconductor transistor NPN, and as described The output port of the wireless transmission drive circuit A is connected to the wireless transmission coil A (as shown in L3 in Figure 3);

In a static working state, the semiconductor transistors PNP and NPN are turned on;

When the micro control unit MCU inputs a high level through the uplink control port A1, the collector of the semiconductor triode PNP outputs a forward voltage; when the micro control unit MCU inputs a high level through the downlink control port A2 , the collector of the semiconductor triode NPN outputs a reverse voltage; the micro control unit MCU outputs the forward voltage and the reverse voltage in turn through control, generates the detection pulse A and/or generates and drives the wireless Transmitting coil A continuously emits a signal of magnetic field energy.

This embodiment is applicable to Embodiment 1, and provides the specific implementation of the micro-control unit MCU and the bridge-type wireless transmission drive circuit A. It can be seen from Fig. For an implementation manner, reference may be made to the implementation in Embodiment 2, wherein the wireless transmitting coil B is specifically L4 in FIG. 3 .

In combination with this embodiment, there is an optional solution, specifically, the semiconductor triode can be replaced with a field effect transistor.

Embodiment 3:

Based on the disclosure in Embodiment 1, this embodiment further elaborates the specific connection manner and implementation method of the decoding detection circuit module A and the micro control unit MCU. As shown in Figure 2 and Figure 4, the decoding detection circuit module A is composed of an integrated power amplifier to form a voltage amplifier (as shown in LM324 in Figure 4), then the detection port of the bridge wireless transmission drive circuit A (as shown in Figure 2 Shown in DET) is connected to the decoding detection circuit module A, and the output port of the decoding detection circuit module A (as shown in CODE_DET in Figure 4) is connected to the micro control unit MCU, specifically:

The input port of the voltage amplifier is connected to the detection port of the wireless transmission drive circuit A;

The output port of the voltage amplifier (shown as CODE_DET in FIG. 4 ) is connected to the decoding input port of the micro control unit MCU (shown as CODE_DET in FIG. 2 ).

When DW540 is used, because it is provided with a decoding input port (as shown in CODE_DET in Figure 2), therefore, in the actual situation that there is already a device charging in the wireless transmitting coil A, the bridge wireless transmitting drive circuit B The detection pulse B will still be transmitted according to the specified cycle, and the driving of the wireless transmitting coil A will be stopped during the effective time of transmitting the detection pulse B and the effective time of receiving DET, thereby avoiding the bridge wireless transmission The influence of the charging energy in the driving circuit A on the DET port. In this embodiment, the detection port of the bridge wireless transmission driving circuit A and the detection port of the bridge wireless transmission driving circuit B are both connected to the CODE_DET port of the DW540.

Combining the content disclosed in this embodiment, there is a preferred solution for improving the connection between the detection port of the bridge wireless transmission drive circuit A and the detection port of the bridge wireless transmission drive circuit B connected to the CODE_DET port of DW540 method, as follows:

The COM+ port based on DW540 is connected to the control switch circuit, the two input terminals of the switch circuit are respectively connected to the detection port of the bridge type wireless transmission drive circuit A and the detection port of the bridge type wireless transmission drive circuit B, and its output port is connected to the CODE_DET of the DW540 Port, when it is necessary to transmit the detection signal of the bridge wireless transmission drive circuit A, the DW540 drives the control switch circuit through the COM+ port to conduct the detection port of the bridge wireless transmission drive circuit A and the CODE_DET port of the DW540; When the detection signal of the wireless transmission driving circuit B is detected, the DW540 drives the control switch circuit through the COM+ port to conduct the detection port of the bridge wireless transmission driving circuit B and the CODE_DET port of the DW540.

Embodiment 4:

On the basis of the disclosure of embodiment 1, this embodiment 4 also proposes an alternative solution, which can achieve better technical effects in combination with embodiment 1, specifically:

The car emergency starter power supply with multi-gear wireless charging function shown also includes a status indicator light, as shown in Figure 2 and Figure 6, specifically:

Described micro control unit MCU connects charging indicator light (as shown in Ds2 among Fig. 6) and error indicator light (as shown in Ds1 among Fig. 6);

The charging indicator light is used to receive a control signal from the micro control unit during charging and/or when charging is full, and complete the corresponding status display;

The error indicator light is used to receive a control signal from the micro control unit when a non-rechargeable object is placed, and complete the corresponding status display.

Embodiment 5:

On the basis of the disclosure of embodiment 1, this embodiment 5 also proposes an alternative solution, which can achieve better technical effects in combination with embodiment 1, specifically:

The micro control unit MCU is also used to, according to the decoding detection circuit module A, stop inputting a drive signal to the bridge wireless transmission drive circuit A after detecting that the device to be charged is fully charged, thereby stopping the wireless transmission coil A emits magnetic field energy.

Wherein, the detecting that the device to be charged is fully charged according to the decoding detection circuit module A specifically includes:

The magnetic field energy receiving device in the device to be charged generates a reverse magnetic field after the battery in the device to be charged is fully charged, and acts on the wireless transmitting coil;

When the micro control unit MCU obtains the corresponding current change through the decoding detection circuit module A, and confirms that the device to be charged is fully charged, it stops inputting a driving signal to the bridge wireless transmission driving circuit A.

Embodiment 6:

On the basis of the disclosure of embodiment 1, this embodiment 6 also proposes an alternative solution, which can achieve better technical effects in combination with embodiment 1, specifically:

The car emergency starter power supply with multi-gear wireless charging function shown also includes a current detection module, as shown in Figure 2, Figure 3 and Figure 5, specifically:

The loop of the wireless transmitting coil A and the wireless transmitting coil B (as shown by I_DETE in Figure 5) is connected with a current detection module, and the wireless transmitting coil A or the wireless transmitting coil A is connected to the current follower formed by an integrated operational amplifier through a current follower formed by an integrated operational amplifier. The current on the loop B of the wireless transmitting coil is delivered to the micro control unit MCU (shown as AMP in Fig. 2 and Fig. 5). So that when the loop current of the MCU is too high, the wireless charging is terminated, thereby protecting the circuit.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention within.

Claims (10)

1. a car emergency with many gears wireless charging function starts power supply, it is characterized in that, comprise micro-control unit MCU, decoding testing circuit modules A, decoding testing circuit module B, bridge-type wireless transmission drive circuit A, bridge-type wireless transmission drive circuit B, wireless transmission loop A, wireless transmission coil B, wherein, the detection port of described bridge-type wireless transmission drive circuit A connects decoding testing circuit modules A, and the output port of described decoding testing circuit modules A connects described micro-control unit MCU; The driving port of described bridge-type wireless transmission drive circuit A connects the control port A of described micro-control unit MCU; The output port of described bridge-type wireless transmission drive circuit A connects described wireless transmission loop A; Concrete:

The detection port of described bridge-type wireless transmission drive circuit B connects decoding testing circuit module B, and the output port of described decoding testing circuit module B connects described micro-control unit MCU; The driving port of described bridge-type wireless transmission drive circuit B connects the control port B of described micro-control unit MCU; The output port of described bridge-type wireless transmission drive circuit B connects described wireless transmission coil B;

Concrete, described micro-control unit MCU passes through control port A and control port B and sends detection pulse A respectively to described bridge-type wireless transmission drive circuit A and bridge-type wireless transmission drive circuit B and detect pulse B;

Described detection pulse A and detection pulse B, respectively via described wireless transmission loop A and wireless transmission coil B, is converted to field signal and launches;

Described decoding testing circuit modules A, by corresponding detection port, detects the size of the electric current of described bridge-type wireless transmission drive circuit A after driving described wireless transmission loop A to launch described field signal;

When the size of described electric current exceedes predetermined threshold value, confirm that current equipment to be charged is suitable for described bridge-type wireless transmission drive circuit A;

Described wireless transmission loop A is driven to continue to launch the charging that magnetic field energy completes equipment to be charged by described bridge-type wireless transmission drive circuit A.

2. car emergency according to claim 1 starts power supply, and it is characterized in that, described detection pulse A and described detection pulse B, is sent according to designated period by described micro-control unit MCU.

3. car emergency according to claim 1 starts power supply, it is characterized in that, describedly drives described wireless transmission loop A to continue to launch while magnetic field energy completes the charging of equipment to be charged by described bridge-type wireless transmission drive circuit A, also comprises:

Described micro-control unit MCU, according to the described cycle of specifying, keeps the transmission of the detection pulse B for described wireless transmission coil B.

4. car emergency according to claim 3 starts power supply, and it is characterized in that, the described cycle of specifying is specially:

500ms, described 500ms comprises: the time of the electric current that the time of described detection pulse A and micro-control unit MCU process described decoding testing circuit modules A export.

5. car emergency according to claim 1 starts power supply, and it is characterized in that, the control port A of described micro-control unit MCU is connected with the driving port of described bridge-type wireless transmission drive circuit A, for described wireless transmission loop A generates alternating voltage, concrete:

The driving port of described bridge-type wireless transmission drive circuit A comprises driving port one and drives port 2, the control port A of described micro-control unit MCU comprises upload control port A1 and descending control port A2, in described bridge-type wireless transmission drive circuit A, described driving port one and the base stage driving port 2 to be connected transistor PNP and NPN respectively, the collector electrode of described transistor PNP connects the collector electrode of described transistor NPN, and connects described wireless transmission loop A as the output port of described wireless transmission drive circuit A;

Under quiescent operation state, described transistor PNP and NPN conducting;

When described micro-control unit MCU is by described upload control port A1 input high level, the collector electrode of described transistor PNP exports forward voltage; When described micro-control unit MCU is by described descending control port A2 input high level, the collector electrode of described transistor NPN exports reverse voltage; Described micro-control unit MCU, by controlling to export described forward voltage and described reverse voltage in turn, generates described detection pulse A and/or generates the signal driving described wireless transmission loop A to continue to launch magnetic field energy.

6. car emergency according to claim 4 starts power supply, and it is characterized in that, what described transistor was concrete can replace with field effect transistor.

7. start power supply according to the arbitrary described car emergency of claim 1-6, it is characterized in that, described decoding testing circuit modules A forms voltage amplifier by integrated power amplifier, then the detection port of described bridge-type wireless transmission drive circuit A connects decoding testing circuit modules A, the output port of described decoding testing circuit modules A connects described micro-control unit MCU, is specially:

The input port of described voltage amplifier connects the detection port of described bridge-type wireless transmission drive circuit A;

The output port of described voltage amplifier connects the decoding input port of described micro-control unit MCU.

8. start power supply according to the arbitrary described car emergency of claim 1-6, it is characterized in that, also comprise status indicator lamp, concrete:

Described micro-control unit MCU connects charging indicator light and wrong indicator light;

Described charging indicator light is used in charging process and/or when being full of, and receives the control signal of described micro-control unit, completes corresponding state display;

Described wrong indicator light is used for when being placed with non-chargeable object, receives the control signal of described micro-control unit, completes corresponding state display.

9. start power supply according to the arbitrary described car emergency of claim 1-6, it is characterized in that, described micro-control unit MCU also for:

According to described decoding testing circuit modules A, after detecting that charging equipment is full of electricity, stop to described bridge-type wireless transmission drive circuit A input drive signal, thus stop described wireless transmission loop A to launch magnetic field energy.

10. car emergency according to claim 9 starts power supply, it is characterized in that, described according to described decoding testing circuit modules A, detects that charging equipment is full of electricity, specifically comprises:

Magnetic field energy receiving system in charging equipment, after the battery in charging equipment is full of electricity, generates an opposing magnetic field, and acts in described wireless transmission coil;

When described micro-control unit MCU gets corresponding curent change by decoding testing circuit modules A, confirm that charging equipment is full of electricity, then stop to described bridge-type wireless transmission drive circuit A input drive signal.