CN112448485A

CN112448485A - Wireless charging power supply manager

Info

Publication number: CN112448485A
Application number: CN202011212681.XA
Authority: CN
Inventors: 王万辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-03-05

Abstract

The invention discloses a wireless charging power supply manager, which comprises a receiving circuit, a switching power supply chip circuit, a switching tube protection circuit, a high-voltage end overcurrent protection circuit, a charging voltage control process circuit, an adapter control unit circuit and an overload protection circuit of a storage battery, and is characterized in that: the receiving circuit receives energy sent by the transmitting wire coil through the L1 resonance inductance coil, the capacitor C0 and the resonance inductance coil L1 are in parallel resonance, and then the resonance voltage is increased again through series resonance formed by the capacitor C0. According to the invention, the transmission host can determine the resonant frequency output at the current distance according to the output resonant frequency, the resonant current, the power input voltage and other comprehensive parameters according to the difference of the relative positions of the transmission wire coil and the receiving wire coil; the triple protection is performed simultaneously.

Description

Wireless charging power supply manager

Technical Field

The invention relates to the technical field of wireless charging, in particular to a wireless charging power supply manager.

Background

The increasing number of automobiles puts a high demand on energy mainly comprising petroleum and natural gas, while petrochemical energy is exhausted, and the oil price is high in the long term. Meanwhile, air pollution caused by automobile exhaust is getting more and more serious. The electric automobile is driven by a motor to run by taking a vehicle-mounted power supply as power. The electric automobile has the advantages of energy conservation, environmental protection, low noise and the like, so that the prospect of the electric automobile is widely seen. However, the development of electric vehicles still faces many technical problems, and the development of charging technology and the deployment of charging stations are important factors.

Battery charging techniques are classified into wired charging and wireless charging. For wired charging, the operation mode is similar to that of the existing gas station, and a person specially needs to operate manually, so that the defects of the mode are obvious, for example, although the mode is safe to the strict design specification, the charging port is easy to ignite under the impact of high voltage and high current, and the device is aged; the charging interface part is easily polluted by dust, rain mist, oil smoke and the like, and the monitoring and the maintenance are troublesome; daily experience shows that the damage rate of the high-power socket is very high, and the socket of the charging station needs to be plugged and pulled frequently, so that the problem is more serious. The wireless charging technology is a technology of transferring electric energy in the air between a charger and a device by an electromagnetic induction or a magnetic resonance technology so that a current flows to charge a battery.

The wireless charging method is effectively applied to handheld communication devices, electric vehicles and the like which require large-capacity battery charging, and since the connection point is buried underground, there is little risk of electric leakage and the like, and the problem of poor connection in the wired charging method can be prevented. The wireless charging can be unattended, does not need to be operated manually, is fully-automatic to operate, and is safe and reliable; the common charging can be realized, the service life of the battery and the value of the whole vehicle after long-term use are improved; the medium power is charged, the pressure on a power grid is low, and the charging device is convenient to popularize and install in a parking lot and a garage.

In recent years, wireless charging core technology is mature day by day, wireless charging efficiency can exceed 90%, wireless charging power can reach 30kw, and wireless charging distance can reach the meter level. However, how to solve the compatibility between the vehicle-mounted device and the charging pile to improve the charging safety and avoid accidents, how to manage the vehicle-mounted charging device and avoid illegal users and the vehicle-mounted charging device from stealing electricity are still the problems faced by the wireless charging industry.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a wireless charging power supply manager to improve the safety of wireless charging and prevent electricity stealing.

In order to solve the problems, the invention is realized by adopting the following technical scheme: wireless charging power manager, including receiving circuit, switching power supply chip circuit, switch tube protection circuit, high-voltage terminal overcurrent protection circuit, charging voltage control process circuit, adapter control unit circuit, the overload protection circuit of storage battery, its characterized in that: the receiving circuit receives energy sent by the transmitting wire coil through the L1 resonance inductance coil, the capacitor C0 and the resonance inductance coil L1 are in parallel resonance, and then the resonance voltage is increased again through series resonance formed by the capacitor C0. After resonance, diodes D1, D2, D3 and D4 form a high-frequency full-wave rectifier bridge, high-frequency variable magnetic energy is converted into direct current, high voltage of several kilovolts is obtained after rectification, and in order to reduce the high voltage, a resistor R0 and a resistor R0 are adopted to limit the high voltage.

The transmission line coil L is in butt joint with the take-up coil L1 for magnetic energy transmission, when the initial rear-end circuit is not set up to work, the rear-stage circuit outputs rectification equivalent to open circuit, the open circuit means that the high voltage of the upper kilovolt is output outwards, and the working parameters of the device of the rear-end adapter cannot meet the high voltage, so a 2-stage resistance limiting mode is adopted, in addition, a diode D17 in the circuit prevents the rear-end switching power supply, and the high voltage returns and recoils when the circuit is turned off to form superposition, so that higher voltage is generated. D18 is when the Q1 switch tube of back-stage is closed, provide the voltage current and bleed off the return circuit.

L1 is a resonant inductor, C0 and C0 are capacitors, D1, D2, D3, D4, D17 and D18 are diodes, and R0 and R0 are resistors.

The aforementioned wireless charging power manager, its characterized in that: the direct current voltage output by the diode D17 is 650V-850V, the direct current voltage is passed through a FU 3A fuse T5D 11 thermosensitive starting resistor, passed through two 550V120uf electrolytic capacitors C1 and C2 which are mutually connected in series, the highest voltage-withstanding voltage of the two electrolytic capacitors in series connection can reach 1100V, and the direct current voltage is loaded to the drain electrode of a P channel adjusting tube of a field effect triode Q1 MSFET through a switch transformer T1, and the voltage-withstanding voltage of Q1 is 1200V 3A; another route is loaded to power switch chip UC3842E 7 foot by R3250 k starting resistor, and UC3842 is inside to be equipped with under-voltage locking circuit, and the opening and close threshold is 16V and 10V.

Before the start, the current consumed by UC3842 is within 1mA, the normal working current is 15mA after the start, once the pin has working voltage, an internal reference voltage generator of the device generates 5V reference voltage, the reference voltage is output by a pin 8 of a chip, C5 is a reference voltage filter capacitor, an RC oscillating circuit consisting of pins R6, C6 and 4 of the chip starts to oscillate, PWM output by a pin 6 of the chip is loaded to a grid electrode of a Q1 MSFET through R4 and R4 which are connected in series, a high-low voltage pulse formed by the PWM is conducted by a field effect transistor during the high pulse, the current passes through a primary side of a transformer, and meanwhile, the energy is stored in the transformer. According to the situation of the same-name end, no energy is output from each secondary side of the transformer at the moment. When the high level output by the pin 6 is finished, the field effect tube is cut off, the primary side of the transformer keeps the current unchanged according to Lenz's law, lower positive and upper negative induced electromotive forces are generated, and at the moment, each path of diode on the secondary side is conducted to provide voltage and current for the outside. D8 leads to the filtering of high-frequency filtering C4 electrolytic capacitor through C5 to form continuous working current for the working condition of the switching power supply chip.

The energy stored by a primary winding of the high-frequency transformer during the conduction period of the field effect tube is equal to the energy released by a secondary winding during the closing period of the field effect tube, the output voltage UO is in direct proportion to the on-time of Ton and in inverse proportion to the turn ratio N and the off-time of Toff, when the output voltage is too low due to the change of the power voltage or the change of the load, the PC1 optical coupler controls a pin C8 No. UC 38421 to be a drying capacitor R7 and to be a pull-down resistor, the PWM duty ratio is controlled through internal operation, and the PWM duty ratio is increased to enable the conduction time of the Q1; on the contrary, when the output voltage is increased due to the change of the power supply voltage or the load, the pulse width modulator correspondingly reduces the duty ratio of the PWM output waveform, so that the on-time of the power tube Q1 is shortened and maintained in a certain voltage range.

The aforementioned wireless charging power manager, its characterized in that: the switching tube protection circuit is characterized in that R, C, D spike absorption consisting of a D5 Schottky diode, an R147K resistor and a C3470 pf 1000V capacitor and double discharge discharging circuit functions formed by R0 and D18 enable protection of Q1 turn-off time and back voltage absorption to be prevented from damaging a tube, and R10 is a Q1 power tube grid pull-down resistor.

The aforementioned wireless charging power manager, its characterized in that: r2 in the high-voltage end overcurrent protection circuit is a current sampling resistor, when an output load is overweight due to some reason, the voltage of the voltage on R2 is increased, and the voltage of the UC 38423 pin is increased by a voltage division circuit consisting of R9 and R8, and after internal processing of a chip, output PWM is narrowed, so that output is reduced.

The aforementioned wireless charging power manager, its characterized in that: when the D7 and D15 are conducted in the positive direction in the charging voltage control process circuit, the charging voltage output and the voltage for the rear-end BMS to work are established. The DC 24V voltage output by the D7 is filtered by a C01 high-frequency filter C11 electrolytic capacitor to generate a working voltage. The first route R39, R40 are current-limited and are added to the positive pole of the heat radiation fan, the second route R38 is loaded to the control end of the base of Q3, and the control end of the base obtains a conducting voltage, so that a switch is turned on, and the fan is operated. And the third path is loaded to a collector of Q2, R31 is an upper bias resistor and a 5V working voltage output by a V2F reference, R32 and R29 divide the voltage to obtain a 2.5V reference voltage, and C04 is a reference voltage noise elimination capacitor. The fourth path is loaded to R12, the divided voltage of R12 and R11 is controlled by the reference voltage of V1F, and the voltage rise or decrease caused by the load change of the output controls the primary PWM duty ratio output through the feedback of the PC817 optical couple, thereby achieving the purpose of adjustment.

RT2 is close to D15, and RT2 temperature gradually increases along with the increase of time after the temperature control thermistor RT2 is charged, and the voltage change caused by the increase of time is output through UE1 BMS OUT3 to control the primary PWM output by the PC817 to counteract the influence caused by the temperature change.

C18 and R50 are used for the protection of the RC absorption circuit D15. The 85V voltage output after the D15 rectification is superposed with the D7 voltage after being filtered by C17 and divided by R24, R25, R21, R22, R23 and R23 to provide a working voltage for the UE1 BMS, and simultaneously forms a V1F reference voltage with the R17, R18, R16, R15, R14, R13 and R13 voltages to form PWM feedback control of the PC1 on the primary side, and C9 and C12 are high-frequency desizing capacitors and used for purifying the V1F reference voltage so as to prevent noise interference.

The aforementioned wireless charging power manager, its characterized in that: the adapter control unit circuit: an adjustment instruction is output by an adapter control unit UE1 BMS MCU, the output of a charging pair battery is controlled by a BUCK synchronous rectification circuit, the charging current and the voltage are controlled by the BUCK synchronous BUCK rectification circuit consisting of Q4, L2, Q5, Q6 and Q7, R621 k is a Q4 grid driving resistor R63 grid pull-up resistor R64 is a grid pull-down resistor, and Q6 is a grid driving pulse control R61 is a Q6 base driving resistor. R661 k is Q5 gate drive resistor R67 gate pull-up resistor R68 is a gate pull-down resistor, Q6 is a gate drive pulse control R65 is a Q6 base drive resistor. D16 is an anti-reverse diode, so that the power adapter is protected from being burnt down due to the fact that the positive pole and the negative pole of the battery are connected.

The aforementioned wireless charging power manager, its characterized in that: when the battery is charged by the D16, the loop current is input to the pin 2 of the UE1 BMS through the R610.1R resistor and the voltage division circuit composed of R28 and R27, the output of the BUCK circuit is controlled by the internal operation control OUT1 OUT2 PWM output, when the output current is increased due to some reason, due to the R61 sampling resistor, the voltage across it also increases, the voltage of the corresponding pin 2 of the UE1 BMS also increases, the OU1 OUT2 PWM pulse width is reduced through internal operation adjustment so as to reduce current output, the voltage at two ends of R61 is rapidly increased due to short-circuit current of the load short circuit at the moment, the value is far greater than the current which is ordinarily increased, the current is reflected to a pin of UE 12, the UE1 can simultaneously send OUT a turn-off signal to an OUT3 control source side for turn-off output, the other path of control OUT1 OUT2 for turn-off PWM output, and the resonant frequency output of an emission setting disc is turned off.

According to the invention, the transmission host can determine the resonant frequency output at the current distance according to the output resonant frequency, the resonant current, the power input voltage and other comprehensive parameters according to the difference of the relative positions of the transmission wire coil and the receiving wire coil; while the triple protection is performed almost simultaneously. Meanwhile, the background adapter is informed that a short circuit phenomenon occurs and needs to be processed, and workers and clients are in contact with each other to communicate, discuss and process matters.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The invention will be further elucidated with reference to the description of the drawings.

Wireless charging power manager, including receiving circuit, switching power supply chip circuit, switch tube protection circuit, high-voltage terminal overcurrent protection circuit, charging voltage control process circuit, adapter control unit circuit, the overload protection circuit of storage battery, its characterized in that: the receiving circuit receives energy sent by the transmitting wire coil through the L1 resonance inductance coil, the capacitor C0 and the resonance inductance coil L1 are in parallel resonance, and then the resonance voltage is increased again through series resonance formed by the capacitor C0. After resonance, diodes D1, D2, D3 and D4 form a high-frequency full-wave rectifier bridge, high-frequency variable magnetic energy is converted into direct current, high voltage of several kilovolts is obtained after rectification, and in order to reduce the high voltage, a resistor R0 and a resistor R0 are adopted to limit the high voltage.

The working process is as follows: the adapter is connected into a voltage division circuit consisting of R355.1M, R35, 5.1M, R35 and 220K to detect the voltage of the current battery, distinguish whether the voltage type of the current battery is 48V, 60V and 72V, and download the battery type codes together when the identification codes are downloaded, so that attention is not paid to the current stage of the AH number of the battery. Because the adapter is in a state of being always connected with the battery, the adapter is loaded with a unique identification code and a characteristic code at the initial installation stage, the identification code is generated by a random number, is locally stored in the adapter UE1 BMS EEPRO, is loaded by an upper computer and is uploaded to a background database at a far end. The unique identification code and the characteristic code identity authentication are carried out on the group of storage batteries during charging, if the unique identification code is not available, the charging is allowed for 3 minutes, the short message notification is carried out, the WeChat applet is opened, the unique identification code can be downloaded online, the decrypted adapter is not provided with the unique identification code, the unique identification code is in a network server database and a local BMS EEPROM (battery management system), if the decrypted adapter is decrypted, the system can lock the computer according to the use condition of a previous charging user, when a second same user is found, the background gives an alarm, and a worker is dispatched to carry out field confirmation), so that the convenience is brought to the identification of the adapter, the problem that different electric vehicles move a family vehicle to the user who is charging to the own vehicle to charge at the same position is solved, even if the user is changed to the own vehicle for charging, the charging of the previous user is not finished, the unique identification code is confirmed by the system to be not charged, and meanwhile, the short message can remind the user that the vehicle is possibly separated from a charging area.

If the system has power failure due to some reason in the charging process, the user who is not finished or leaves the charging area in the charging process will continue to finish the rest charging when the system is powered on again.

Wireless charging establishment process: when a user stops in a certain charging position area, after the WeChat applet scans codes and pays, the host receives a starting charging instruction, a transmitting coil L of the host sends a test resonant pulse, a receiving coil L1 receives the test resonant pulse, and according to the power supply voltage, the input current, the high-frequency current and the currently output resonant frequency which are fed back and detected by the output of the host, the collected data array is analyzed and analyzed to determine the distance between the current transmitting coil and the current receiving coil, so that the PWM frequency value to be output under the current distance is determined. After the mobile phone enters a steady state period, the adapter sends an online signal, the online signal is output by a pin UE1 BMS 3, the low level time 50ms represents 0 high level time 30ms 1, an online data packet is sent, after the host receives the online data packet, the transmitting power is reduced, (the reducing of the transmitting power is beneficial to reducing resonance voltage and is also beneficial to data transmission), the adapter returns the charging current, the battery voltage, the unique identification code and the machine characteristic code during normal charging to the host, the host records the current information condition after receiving the information, and the information is recovered to a normal charging power output state after 150 ms. The vehicle displacement takes place for personnel do not touch the vehicle at the charging process, if the host computer detects the transmission drum and connects the take-up reel distance too closely, can stop to export and protect, when still exporting with original output quantity when the distance is too close, can cause output resonance voltage too high to cause the adapter to damage. If the host computer detects that the distance between the launching wire coil and the receiving wire coil is too far, the host computer can also stop to carry out protection, and too far charging current is too small to cause overlong charging time. When the transmitting wire coil host detects that the distance between the transmitting wire coil and the receiving wire coil exceeds 8CM, the electric vehicle cannot be charged due to the fact that the distance exceeds the charging range.

In the overload protection process of the battery, when the D16 charges the battery, loop current is input to a pin 2 of a UE1 BMS through a R610.1R resistor and a voltage division circuit consisting of R28 and R27, the output of a BUCK circuit is controlled through internal operation control OUT1 OUT2 PWM output, when the output current is increased due to some reason, the voltage at two ends of the R61 sampling resistor is also increased, the voltage at the corresponding pin 2 of the UE1 BMS is also increased, the OU1 OUT2 PWM pulse width is reduced through internal operation adjustment so as to reduce the current output, the voltage at two ends of the R61 is rapidly increased due to short-circuit current in case of load short circuit, the value is far greater than the commonly increased current and is reflected to the pin 12 of the UE1, one way of a turn-off signal is simultaneously sent to the OUT3 control source side turn-off output, the OUT1 OUT2 turn-off the PWM output, and meanwhile, an emitting wire coil panel also detects output abnormality, closing the resonant frequency output of the emission wire arranging disc; the triple protection is performed almost simultaneously.

Claims

1. Wireless charging power manager, including receiving circuit, switching power supply chip circuit, switch tube protection circuit, high-voltage terminal overcurrent protection circuit, charging voltage control process circuit, adapter control unit circuit, the overload protection circuit of storage battery, its characterized in that: the receiving circuit receives energy sent by the transmitting wire coil through the L1 resonance inductance coil, the capacitor C0 and the resonance inductance coil L1 are in parallel resonance, and then the resonance voltage is increased again through forming series resonance with the capacitor C0; after resonance, diodes D1, D2, D3 and D4 form a high-frequency full-wave rectifier bridge, high-frequency variable magnetic energy is converted into direct current, high voltage of several kilovolts is obtained after rectification, a resistor R0 and a resistor R0 are adopted to reduce the high voltage to limit the high voltage, when the initial rear-end circuit does not work, a rear-end circuit outputs the rectification equivalently in an open circuit, and the working parameters of devices of a rear-end adapter cannot meet the high voltage, so a 2-stage resistance limiting mode is adopted; the diode D17 in the circuit prevents the high-voltage return surge of the switching power supply at the rear end when the switching power supply is turned off from forming superimposed higher voltage; the D18 provides a voltage and current leakage loop when the rear-stage Q1 switching tube is turned off.

2. The wireless charging power manager of claim 1, wherein: the direct current voltage output by the diode D17 is 650V-850V, passes through an F13A fuse T5D 11 thermosensitive starting resistor and passes through two 550V120uf electrolytic capacitors C1 and C2 which are mutually connected in series; the two electrolytic capacitors are connected in series, the partial pressure is highest and the highest withstand voltage can reach 1100V, the partial pressure is loaded to the drain electrode of a P channel adjusting tube of a field effect triode Q1 MSFET through a switching transformer T1, and the withstand voltage of Q1 is 1200V 3A; another route is loaded to power switch chip UC3842E 7 foot by R3250 k starting resistor, and UC3842 is inside to be equipped with under-voltage locking circuit, and the opening and close threshold is 16V and 10V.

3. The wireless charging power manager of claim 2, wherein: within 1mA of current consumed before the UC3842 is started, the normal working current is 15mA after the UC3842 is started, once the pin has working voltage, a reference voltage generator inside the device generates 5V reference voltage, the reference voltage is output by a pin 8 of a chip, C5 is a reference voltage filter capacitor, an RC oscillating circuit consisting of pins R6, C6 and chip 4 starts to vibrate, PWM output by a pin 6 of the chip is loaded to a grid electrode of a Q1 MSFET through R4 and R4 which are connected in series, high and low voltage pulses formed by the PWM are conducted during the high pulse period, the current passes through a primary side field effect transistor of a transformer, and meanwhile, the energy is stored in the transformer; according to the situation of the same-name end, no energy is output from each secondary side of the transformer at the moment; when the high level output by the pin 6 is finished, the field effect tube is cut off, the primary side of the transformer keeps the current unchanged according to Lenz's law, induced electromotive force with the lower positive side and the upper negative side is generated, and at the moment, each path of diode on the secondary side is conducted to provide voltage and current for the outside; d8 leads to pass through C5 high frequency filtering C4 electrolytic capacitor filtering to form continuous working current to provide the switching power supply chip working condition; the energy stored by a primary winding of the high-frequency transformer during the conduction period of the field effect tube is equal to the energy released by a secondary winding during the closing period of the field effect tube, the output voltage UO is in direct proportion to the on-time of Ton and in inverse proportion to the turn ratio N and the off-time of Toff, when the output voltage is too low due to the change of the power voltage or the change of the load, the PC1 optical coupler controls a pin C8 No. UC 38421 to be a drying capacitor R7 and to be a pull-down resistor, the PWM duty ratio is controlled through internal operation, and the PWM duty ratio is increased to enable the conduction time of the Q1; conversely, when the output voltage is increased due to the change of the power supply voltage or the change of the load, the pulse width modulator correspondingly reduces the duty ratio of the PWM output waveform, so that the on-time of the power tube Q1 is shortened and the power tube Q1 is maintained in the voltage range.

4. The wireless charging power manager of claim 1, wherein: the switching tube protection circuit is characterized in that R, C, D spike absorption consisting of a D5 Schottky diode, an R147K resistor and a C3470 pf 1000V capacitor and double discharge discharging circuit functions formed by R0 and D18 enable protection of Q1 turn-off time and back voltage absorption to be prevented from damaging a tube, and R10 is a Q1 power tube grid pull-down resistor.

5. The wireless charging power manager of claim 1, wherein: r2 in the high-voltage end overcurrent protection circuit is a current sampling resistor, when an output load is overweight due to some reason, the voltage of the voltage on R2 is increased, and the voltage of the UC 38423 pin is increased by a voltage division circuit consisting of R9 and R8, and after internal processing of a chip, output PWM is narrowed, so that output is reduced.

6. The wireless charging power manager of claim 1, wherein: when D7 and D15 are conducted in the positive direction in the charging voltage control process circuit, the charging voltage output and the voltage of rear-end BMS work are established; the DC 24V voltage output by the D7 is filtered by a C01 high-frequency filter C11 electrolytic capacitor to generate a working voltage; the first route R39 and R40 are used for limiting current and adding the current to the positive pole of the cooling fan, and the second route R38 is loaded to the control end of the base of Q3, so that a switch is formed to be switched on due to the fact that the control end obtains a conducting voltage, and the fan runs; the third path is loaded to a collector of Q2, R31 is an upper bias resistor and a 5V working voltage output by a V2F reference, R32 and R29 divide the voltage to obtain a 2.5V reference voltage, and C04 is a reference voltage noise elimination capacitor; the fourth path is loaded to R12, the divided voltage of R12 and R11 is controlled by the reference voltage of V1F, and the voltage rise or decrease caused by the load change of the output controls the primary PWM duty ratio output through the feedback of the PC817 optical couple, thereby achieving the purpose of adjustment.

7. The wireless charging power manager of claim 6, wherein: the RT2 is close to the D15, the temperature of the RT2 gradually increases along with the increase of time after the temperature control thermistor RT2 is charged, and the caused voltage change offsets the influence caused by the temperature change by outputting the control PC817 to adjust the primary PWM output through the UE1 BMS OUT 3; c18 and R50 are used for the protection of the RC absorption circuit D15; the 85V voltage output after the D15 rectification is superposed with the D7 voltage after being filtered by C17 and divided by R24, R25, R21, R22, R23 and R23 to provide a working voltage for the UE1 BMS, and simultaneously forms a V1F reference voltage with the R17, R18, R16, R15, R14, R13 and R13 voltages to form PWM feedback control of the PC1 on the primary side, and C9 and C12 are high-frequency desizing capacitors and used for purifying the V1F reference voltage so as to prevent noise interference.

8. The wireless charging power manager of claim 1, wherein: the adapter control unit circuit: an adjustment instruction is output by an adapter control unit UE1 BMS MCU, the output of a charging pair battery is controlled by a BUCK synchronous rectification circuit, the charging current and the voltage are controlled by the BUCK synchronous BUCK rectification circuit consisting of Q4, L2, Q5, Q6 and Q7, R621 k is a Q4 grid driving resistor R63 grid pull-up resistor R64 is a grid pull-down resistor, and Q6 is a grid driving pulse control R61 is a Q6 base driving resistor; r661 k is Q5 gate drive resistor R67 gate pull-up resistor R68 is gate pull-down resistor, Q6 is gate drive pulse control R65 is Q6 base drive resistor; d16 is an anti-reverse diode, so that the power adapter is protected from being burnt down due to the fact that the positive pole and the negative pole of the battery are connected.

9. The wireless charging power manager of claim 1, wherein: when the D16 charges the battery, the loop current is input to the 2 pin of the UE1 BMS through the R610.1R resistor and the voltage dividing circuit composed of R28 and R27, the OUT1 OUT2 PWM output is controlled through internal operation to control the output of the BUCK circuit, when the output current is increased due to some reason, the voltage at two ends of the R61 sampling resistor is also increased due to the R61 sampling resistor, the voltage at the 2 pin of the corresponding UE1 BMS is also increased, the OU1 OUT2 PWM pulse width is reduced through internal operation adjustment so as to reduce the current output, the voltage at two ends of the R61 is rapidly increased due to the short-circuit current during load, the value is far greater than the commonly increased current and is reflected to the UE 12 pin, the UE1 simultaneously sends one way of a turn-off signal to the OUT3 control source side turn-off output, the other way of the OUT1 OUT2 turns off the PWM output, and the frequency output of a transmitting wire coil is turned.