Equalization current adjustment method and related apparatus

1. An equalization current adjustment method, the method comprising:

determining a battery unit to be equalized in a battery pack;

obtaining a current actual equalization current value of the battery unit; and

when a difference between the current actual equalization current value and a target equalization current value does not fall within a range of a preset threshold, adjusting a fundamental amplitude of an alternating current power supply of a target circuit on which the battery unit is located or a voltage gain of the target circuit, so that the difference between the current actual equalization current value and the target equalization current value falls within the range of the preset threshold,

wherein the target equalization current value is obtained by a frequency gating battery pack active equalization apparatus according to a current energy status of the battery unit, and the target circuit comprises a circuit component connected to the battery unit, the alternating current power supply, and the battery unit.

2. The method according to claim 1 , wherein obtaining a current actual equalization current value of the battery unit comprises:

obtaining the fundamental amplitude of the alternating current power supply of the target circuit and the voltage gain of the target circuit; and

obtaining, by calculation, the current actual equalization current value of the battery unit according to the fundamental amplitude of the alternating current power supply of the target circuit and the voltage gain of the target circuit.

3. The method according to claim 1 , wherein obtaining a current actual equalization current value of the battery unit comprises:

detecting a current of the battery unit using a sensor, so as to obtain the current actual equalization current value of the battery unit.

4. The method according to claim 2 , wherein obtaining the fundamental amplitude of the alternating current power supply of the target circuit and the voltage gain of the target circuit comprises:

obtaining a driver signal phase shift angle and a voltage amplitude of a direct current power supply that are related to the fundamental amplitude of the alternating current power supply of the target circuit, wherein the driver signal phase shift angle is a driver signal phase shift angle of a switch structure in the alternating current power supply, and the alternating current power supply includes the direct current power supply and the switch structure in the alternating current power supply; and

obtaining a driving frequency related to the voltage gain of the target circuit, wherein the driving frequency is a driving frequency of the switch structure in the alternating current power supply; and

wherein obtaining the current actual equalization current value of the battery unit according to the fundamental amplitude of the alternating current power supply of the target circuit and the voltage gain of the target circuit comprises:

obtaining, by calculation, the current actual equalization current value of the battery unit according to the driver signal phase shift angle, the voltage amplitude of the direct current power supply, and the driving frequency.

5. The method according to claim 4 , wherein adjusting the fundamental amplitude of the alternating current power supply comprises:

generating, according to the driver signal phase shift angle, a first instruction signal to control the driver signal phase shift angle or generating, according to the voltage amplitude of the direct current power supply, a second instruction signal to control the voltage amplitude of the direct current power supply; and

outputting at least one of the first instruction signal and the second instruction signal to a control unit corresponding to the first instruction signal or the second instruction signal to adjust the fundamental amplitude of the alternating current power supply, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.

6. The method according to claim 4 , wherein adjusting the voltage gain of the target circuit comprises:

generating, according to the driving frequency, a second instruction signal to control the driving frequency; and

outputting the second instruction signal to a control unit corresponding to the second instruction signal to adjust the voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.

7. The method according to claim 4 , wherein adjusting the fundamental amplitude of the alternating current power supply and the voltage gain of the target circuit comprises:

generating, according to the driver signal phase shift angle, a first instruction signal to control the driver signal phase shift angle or generating, according to the voltage amplitude of the direct current power supply, a second instruction signal to control the voltage amplitude of the direct current power supply;

generating, according to the driving frequency, a third instruction signal to control the driving frequency; and

outputting at least one of the first instruction signal and the second instruction, and outputting a third instruction signal to a control unit corresponding to the third instruction signal to adjust the fundamental amplitude of the alternating current power supply and the voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.

8. The method according to claim 1 , wherein the preset threshold is defined by a user or a default threshold of the frequency gating battery pack active equalization apparatus.

9. The method according to claim 1 , wherein the target equalization current value is obtained from the sensor by the frequency gating battery pack active equalization apparatus or is defined by a user.

10. A frequency gating battery pack active equalization apparatus, comprising:

a controlled alternating current power supply;

an alternating current electric energy allocation unit coupled to the controlled alternating current power supply;

a filter unit coupled to the alternating current electric energy allocation unit;

a rectifier unit coupled to the filter unit; and

an equalization control unit coupled to the controlled alternating current power supply, wherein the equalization control unit is configured to:

determine a battery unit to be equalized in a battery pack, and obtain a current actual equalization current value of the battery unit, and

when a difference between the current actual equalization current value and a target equalization current value does not fall within a range of a preset threshold, adjust a fundamental amplitude of an alternating current power supply of a target circuit on which the battery unit is located or a voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold, wherein the target equalization current value is an equalization current value obtained by a frequency gating battery pack active equalization apparatus according to a current energy status of the battery unit, and the target circuit comprises a circuit component connected to the battery unit, the alternating current power supply, and the battery unit.

11. The apparatus according to claim 10 , wherein the equalization control unit is configured to:

obtain the fundamental amplitude of the alternating current power supply of the target circuit and the voltage gain of the target circuit, and

obtain, by calculation, the current actual equalization current value of the battery unit according to the fundamental amplitude of the alternating current power supply of the target circuit and the voltage gain of the target circuit.

12. The apparatus according to claim 10 , wherein the equalization control unit is configured to detect a current of the battery unit using a sensor to obtain the current actual equalization current value of the battery unit.

13. The apparatus according to claim 11 , wherein

the equalization control unit is configured to:

obtain a driver signal phase shift angle and a voltage amplitude of a direct current power supply that are related to the fundamental amplitude of the alternating current power supply of the target circuit, wherein the driver signal phase shift angle is a driver signal phase shift angle of a switch structure in the alternating current power supply, and the alternating current power supply is formed according to the direct current power supply and the switch structure in the alternating current power supply; and

obtain a driving frequency related to the voltage gain of the target circuit, wherein the driving frequency is a driving frequency of the switch structure in the alternating current power supply, and

wherein the equalization control unit is configured to obtain, by calculation, the current actual equalization current value of the battery unit according to the driver signal phase shift angle, the voltage amplitude of the direct current power supply, and the driving frequency.

14. The apparatus according to claim 13 , wherein the equalization control unit is configured to:

generate, according to the driver signal phase shift angle, a first instruction signal to control the driver signal phase shift angle or generate, according to the voltage amplitude of the direct current power supply, a second instruction signal to control the voltage amplitude of the direct current power supply; and

output at least one of the first instruction signal and the second instruction signal to a control unit corresponding to the first instruction signal or the second instruction signal to adjust the fundamental amplitude of the alternating current power supply, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.

15. The apparatus according to claim 13 , wherein

the equalization control unit is configured to output a third instruction signal to control the driving frequency to a control unit corresponding to the third instruction signal to adjust the voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.

16. The apparatus according to claim 13 , wherein the equalization control unit is configured to:

generate, according to the driver signal phase shift angle, a first instruction signal to control the driver signal phase shift angle or generate, according to the voltage amplitude of the direct current power supply, a second instruction signal to control the voltage amplitude of the direct current power supply;

generate, according to the driving frequency, a third instruction signal to control the driving frequency;

output at least one of the first instruction signal and the second instruction signal to a control unit corresponding to the first instruction signal or the second instruction signal; and

output a third instruction signal to control the driving frequency to a control unit corresponding to the third instruction signal to adjust the fundamental amplitude of the alternating current power supply and the voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.