Method for identifying the identity of a wireless charging user and circuit for implementing the method

Abstract

The present invention discloses an identity recognition method for wireless charging users and a circuit for implementing the method, which are sequentially implemented according to the following steps: the main program of the adapter starts to work, the resonant coil receives a ranging disturbance pulse, a resonant voltage and a resonant current are established, the primary side of the adapter starts, the BMS of the adapter starts, a stable output is achieved, the BMS PWM is adjusted to send an online signal, the online signal is judged, the local information is extracted, the local information is transmitted back, a stable charging state is achieved, various charging parameters of the adapter are detected, the current battery charging parameters are detected and processed, the current charging time is up, and the charging is ended. The present invention has the advantages of being safe and efficient and capable of preventing illegal users and in-vehicle charging devices from stealing electricity.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and specifically to a method for identifying the identity of wireless charging users and a circuit for implementing the method. Background Art

[0002] In recent years, the core technology of wireless charging has become increasingly mature. The wireless charging efficiency can exceed 90%, the wireless charging power can reach 30 kw, and the wireless charging distance can reach the meter level. However, how to solve the compatibility between in-vehicle devices and charging piles to improve charging safety and avoid accidents, and how to manage in-vehicle charging devices to prevent illegal users and in-vehicle charging devices from stealing electricity are still problems faced by the wireless charging industry. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a safe and efficient method for identifying the identity of wireless charging users and a circuit for implementing the method, which can prevent illegal users and in-vehicle charging devices from stealing electricity.

[0004] To achieve the above invention purpose, the present invention is implemented by adopting the following technical solutions: A method for identifying the identity of wireless charging users, characterized in that it is implemented in sequence according to the following steps: The main program of the adapter starts to work, the resonant coil receives a ranging disturbance pulse, a resonant voltage and a resonant current are established, the primary side of the adapter starts, the BMS of the adapter starts, and a stable output is provided. The BMS PWM is adjusted to send an online signal, the online signal is judged, the local information is extracted, all local information is transmitted back, the charging state is stabilized, the charging parameters of the adapter are detected, the charging parameters of the current battery are detected and processed, the current charging time arrives, and the charging ends.

[0005] The aforementioned method for identifying the identity of wireless charging users is characterized in that: in the step of judging the online signal, if the online signal is abnormal, it returns to the step of adjusting the BMS PWM to send the online signal; in the step of detecting the charging parameters of the adapter, it is fed back in real time to the step of adjusting the BMS PWM to send the online signal; in the step of detecting and processing the charging parameters of the current battery, it is fed back in real time to the step of adjusting the BMS PWM to send the online signal.

[0006] The aforementioned method for identifying the identity of wireless charging users is characterized in that: the step of extracting the local information detects the battery type information, battery voltage information, battery capacity, charging identification code, charging current record, charging voltage record, and adapter temperature detection in real time.

[0007] The aforementioned method for identifying the identity of wireless charging users is characterized in that: the charging identification code is a unique identification code of the local machine.

[0008] Circuit for identifying the identity of wireless charging users, characterized in that: when D7 and D15 are forward-conducting, a charging voltage output and a voltage for the operation of the backend BMS are established. The DC 24V voltage output by D7 is filtered by C01 high-frequency filter and C11 electrolytic capacitor to generate the operating voltage. The first path is limited in current by R39 and R40 and added to the positive pole of the cooling fan. The second path is loaded onto the base of Q3, and its control terminal obtains a conducting voltage, forming a switch connection to make the fan operate. The third path is loaded onto the collector of Q2. R31 is the upper bias resistor and the V2F reference outputs a 5V operating voltage. R32 and R29 are used for voltage division to obtain a 2.5V reference voltage. C04 is a noise elimination capacitor for the reference voltage. The fourth path is loaded onto R12, and the voltage division of R12 and R11 is controlled by the reference voltage of V1F. The increase or decrease in voltage caused by the change in the output load is controlled by the feedback of the PC817 optocoupler to adjust the PWM duty cycle output of the primary side, thereby achieving the adjustment purpose. RT2 is close to D15. The temperature control thermistor RT2 gradually increases in temperature after charging. The voltage change caused is output through UE1 BMS OUT3 to control PC817 to adjust the PWM output of the primary side to offset the influence brought by the temperature change. C18 and R50 are RC absorption circuits for protecting D15. The 85V voltage output after D15 rectification is filtered by C17 and then superimposed with the D7 voltage after voltage division by R24, R25, R21, R22, R23, R23* to provide the operating voltage for UE1 BMS. At the same time, it also forms a V1F reference voltage with R17, R18, R16, R15, R14, R13, R13* to constitute the PWM feedback control of the primary side by PC1. C9 and C12 are high-frequency noise elimination capacitors for purifying the V1F reference voltage to prevent clutter interference.

[0009] The circuit for identifying the identity of wireless charging users described above is characterized in that: after the initial stage of charging is formed, it enters a steady state period. The adapter control unit UE1 BMS MCU outputs an adjustment instruction to control the output of the charger to the battery through the BUCK synchronous rectification circuit. The BUCK synchronous buck rectification circuit composed of Q4, L2, Q5, Q6, and Q7 controls the charging current and voltage. R62 1k is the gate drive resistor of Q4, R63 is the gate pull-up resistor, R64 is the gate pull-down resistor, and Q6 controls the gate drive pulse. R61 is the base drive resistor of Q6. R66 1k is the gate drive resistor of Q5, R67 is the gate pull-up resistor, R68 is the gate pull-down resistor, and Q6 controls the gate drive pulse. R65 is the base drive resistor of Q6. D16 is an anti-reverse connection diode to protect the power adapter from being burned out due to the reverse connection of the battery positive and negative poles.

[0010] The present invention has the advantages of being safe and efficient and can avoid power theft by illegal users and in-vehicle charging devices. Description of the Drawings

[0011] Figure 1 It is the block diagram of the step method of the present invention.

[0012] Figure 2 It is the schematic circuit diagram of the present invention. Detailed implementation manners

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figures 1 to 2 It is the preferred mode of the present invention, which shows the method for identifying the identity of a wireless charging user, and is characterized in that: it is sequentially implemented according to the following steps. The main program of the adapter starts to work, the resonant coil receives the ranging disturbance pulse, establishes the resonant voltage and resonant current, the primary side of the adapter starts, the BMS of the adapter starts, stably outputs, adjusts the BMS PWM to send the online signal, judges the online signal, extracts the local information, transmits back the local information items, stabilizes the charging state, detects the charging parameters of the adapter, detects and processes the charging parameters of the current battery, the current charging time arrives, and ends the charging.

[0015] For the aforementioned method for identifying the identity of a wireless charging user, it is characterized in that: in the step of judging the online signal, if the online signal is abnormal, it returns to the step of adjusting the BMS PWM to send the online signal; in the step of detecting the charging parameters of the adapter, it is fed back in real time to the step of returning to adjust the BMS PWM to send the online signal; in the step of detecting and processing the charging parameters of the current battery, it is fed back in real time to the step of returning to adjust the BMS PWM to send the online signal.

[0016] For the aforementioned method for identifying the identity of a wireless charging user, it is characterized in that: the step of extracting the local information detects the battery type information, battery voltage information, battery capacity, charging identification code, charging current record, charging voltage record, and adapter temperature detection in real time.

[0017] For the aforementioned method for identifying the identity of a wireless charging user, it is characterized in that: the charging identification code is the unique identification code of the local machine.

[0018] Circuit for identifying the identity of a wireless charging user, characterized in that: when D7 and D15 are forward-conducting, a charging voltage output and a voltage for the operation of the backend BMS are established. The 24V DC voltage output by D7 is filtered by C01 high-frequency filter and C11 electrolytic capacitor to generate the operating voltage. The first path is limited in current by R39 and R40 and applied to the positive pole of the cooling fan. The second path is applied to the base of Q3, and its control terminal obtains a conduction voltage, forming a switch connection to make the fan operate. The third path is applied to the collector of Q2. R31 is the upper bias resistor and V2F reference outputs a 5V operating voltage. R32 and R29 are used for voltage division to obtain a 2.5V reference voltage. C04 is a noise elimination capacitor for the reference voltage. The fourth path is applied to R12. The voltage division of R12 and R11 is controlled by the reference voltage of V1F. The increase or decrease in voltage caused by the change in the output load is controlled by the feedback of the PC817 optocoupler to adjust the PWM duty cycle output of the primary side to achieve the adjustment purpose. RT2 is close to D15. After the temperature control thermistor RT2 is charged, its temperature gradually rises as time increases. The voltage change caused is output through UE1 BMS OUT3 to control PC817 to adjust the PWM output of the primary side to offset the influence brought by the temperature change. C18 and R50 are RC absorption circuits for protecting D15. The 85V voltage output after D15 is rectified is filtered by C17 and then voltage-divided by R24, R25, R21, R22, R23, R23* and superimposed with the voltage of D7 to provide the operating voltage for UE1 BMS. At the same time, it also forms a V1F reference voltage with R17, R18, R16, R15, R14, R13, R13* to constitute the PWM feedback control of the primary side by PC1. C9 and C12 are high-frequency noise elimination capacitors for purifying the V1F reference voltage to prevent clutter interference.

[0019] The aforementioned circuit for identifying the identity of a wireless charging user, characterized in that: after the initial charging stage is formed, it enters a steady state period. The adapter control unit UE1 BMS MCU outputs an adjustment instruction to control the output of the charger to the battery through the BUCK synchronous rectification circuit. The BUCK synchronous buck rectification circuit composed of Q4, L2, Q5, Q6, and Q7 controls the charging current and voltage. R62 1k is the gate drive resistor of Q4, R63 is the gate pull-up resistor, R64 is the gate pull-down resistor, and Q6 is controlled by the gate drive pulse. R61 is the base drive resistor of Q6. R66 1k is the gate drive resistor of Q5, R67 is the gate pull-up resistor, R68 is the gate pull-down resistor, and Q6 is controlled by the gate drive pulse. R65 is the base drive resistor of Q6. D16 is an anti-reverse connection diode to protect the power adapter from being burned out due to the reverse connection of the battery positive and negative poles.

[0020] Working process: When the adapter is connected to the battery, a voltage-dividing circuit composed of R35 5.1M, R35* 5.1M, and R35** 220K detects the voltage of the current battery, and determines whether the voltage type of the current battery is 48V, 60V, or 72V. The battery type code can also be downloaded together with the identification code during the identification code download. The battery AH value at the current stage is not currently concerned. Since the adapter is always connected to the battery, a unique identification code and feature code are loaded during the initial installation. The identification code is generated randomly and locally stored in the adapter UE1 BMS EEPRO. It is loaded by the upper computer and uploaded to the background database remotely. During charging, the unique identification code and feature code of this group of batteries are authenticated. If there is only a feature code without a unique identification code, charging is allowed for 3 minutes and a text message is sent to inform. The unique identification code can be downloaded online through the WeChat mini-program; assuming it is cracked, the system will lock this device based on the usage situation of previous charging users. When a second same user is found, the background will give an alarm and send personnel to the scene for on-site confirmation. This facilitates the identification of the adapter's identity and solves the problem that for different electric vehicles, some users may move someone else's vehicle away and replace it with their own vehicle to charge at the same location. Even if they replace it with their own vehicle to charge, since the previous user's charging is not completed, and the unique identification code is confirmed by the system, charging will not be allowed. At the same time, a text message will also remind the user that the vehicle may have been removed from the charging area.

[0021] If the system power fails for some reason during the charging process, for users who are charging and have not completed the charging and have not left the charging area, the system will continue to complete the remaining charging when the power comes back on.

Claims

1. Method for identifying the identity of a wireless charging user, Characterized in that: Based on the circuit implementation of the method for identifying the identity of a wireless charging user, the method is sequentially implemented as follows: the main program of the adapter starts to work, the resonant coil receives a ranging disturbance pulse, a resonant voltage and a resonant current are established, the primary side of the adapter starts, the BMS of the adapter starts, and a stable output is achieved. The BMS PWM is adjusted to send an online signal, the online signal is judged, the local information is extracted, all local information is transmitted back, the charging state is stabilized, the charging parameters of the adapter are detected, the charging parameters of the current battery are detected and processed, the current charging time is up, and the charging is ended; In the circuit of the method for identifying the identity of a wireless charging user, when D7 and D15 are forward-conducting, a charging voltage output and a voltage for the operation of the backend BMS will be established. The DC 24V voltage output by D7 is filtered by the high-frequency filter C01 and the electrolytic capacitor C11 to generate a working voltage. The first path is limited in current by R39 and R40 and applied to the positive electrode of the cooling fan. The second path is applied to the base of Q3, and its control terminal obtains a conducting voltage, forming a switch connection so that the fan rotates. The third path is applied to the collector of Q2. R31 is an upper bias resistor and the V2F reference outputs a 5V working voltage. R32 and R29 are used for voltage division to obtain a 2.5V reference voltage. C04 is a noise elimination capacitor for the reference voltage. The fourth path is applied to R12. The voltage division of R12 and R11 is controlled by the reference voltage of V1F. The voltage increase or decrease caused by the change of the output load is controlled by the feedback of the PC817 optocoupler to adjust the PWM duty cycle output of the primary side so as to achieve the adjustment purpose. RT2 is close to D15. After the temperature control thermistor RT2 is charged, its temperature gradually rises as time increases. The voltage change caused is output through UE1BMSOUT3 to control the PC817 to adjust the PWM output of the primary side to offset the influence brought by the temperature change. C18 and R50 are RC absorption circuits for protecting D15. The 85V voltage output after the rectification of D15 is filtered by C17 and then superimposed with the voltages of R24, R25, R21, R22, R23, R23* and the voltage of D7 to provide a working voltage for UE1BMS. At the same time, it also forms a V1F reference voltage with R17, R18, R16, R15, R14, R13, R13* to constitute the PWM feedback control of the primary side by PC1. C9 and C12 are high-frequency noise elimination capacitors for purifying the V1F reference voltage to prevent clutter interference.

2. The method for identifying the identity of a wireless charging user according to claim 1, Characterized in that: In the step of judging the online signal, if the online signal is abnormal, it will return to the step of adjusting the BMS PWM to send the online signal; in the step of detecting the charging parameters of the adapter, it is fed back in real time to the step of returning to adjust the BMS PWM to send the online signal; in the step of detecting and processing the charging parameters of the current battery, it is fed back in real time to the step of returning to adjust the BMS PWM to send the online signal.

3. The method for identifying the identity of a wireless charging user according to claim 1, Characterized in that: The step of extracting the local information detects the battery type information, battery voltage information, battery capacity, charging identification code, charging current record, charging voltage record, and adapter temperature detection in real time.

4. The method for identifying the identity of a wireless charging user according to claim 3, characterized in that: the charging identification code is a unique identification code of this machine.

5. The method for identifying the identity of a wireless charging user according to claim 1, characterized in that: After the initial stage of charging is formed, it enters a steady state period. The adapter control unit UE1BMSMCU outputs an adjustment instruction to control the output of the charger to the battery through the BUCK synchronous rectification circuit; the BUCK synchronous buck rectification circuit composed of Q4, L2, Q5, Q6, and Q7 controls the charging current and voltage. R62 1k is the gate drive resistor of Q4, R63 is the gate pull-up resistor, R64 is the gate pull-down resistor, and Q6 is controlled by the gate drive pulse. R61 is the base drive resistor of Q6; R66 1k is the gate drive resistor of Q5, R67 is the gate pull-up resistor, R68 is the gate pull-down resistor, and Q6 is controlled by the gate drive pulse. R65 is the base drive resistor of Q6, and D16 is an anti-reverse connection diode to protect the power adapter from being burned out due to the reverse connection of the positive and negative poles of the battery.

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