CN-121984196-A - Signal processing method and system of battery power supply equipment and electronic equipment

CN121984196ACN 121984196 ACN121984196 ACN 121984196ACN-121984196-A

Abstract

The embodiment of the application provides a signal processing method, a system and electronic equipment of power supply equipment of a battery, wherein the method comprises the steps of determining a first voltage signal, a second voltage signal and a third voltage signal corresponding to the power supply equipment of the battery, wherein the first voltage signal is used for representing the current charging state of the power supply equipment, the second voltage signal is used for representing the normal charging state of the power supply equipment, and the third voltage signal is used for compensating the influence result of a target factor on the current charging state; and calibrating the current to be calibrated of the power supply equipment based on the target voltage signal and temperature information corresponding to the first voltage signal, the second voltage signal and the third voltage signal respectively to obtain target current. The application solves the technical problem of low signal processing accuracy of the power supply equipment of the battery.

Inventors

REN SHAOJUN
ZHANG CHUNMEI
GUO YAQIANG
LIU SHUO
LI YANGHAO
LV KUNPENG

Assignees

广州汽车集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260105

Claims (13)

1. A signal processing method of a power supply device of a battery, comprising: Determining a first voltage signal, a second voltage signal and a third voltage signal corresponding to power supply equipment of a battery, wherein the first voltage signal is used for representing the current charging state of the power supply equipment, the second voltage signal is used for representing the normal charging state of the power supply equipment, the third voltage signal is used for compensating the influence result of a target factor on the current charging state, and the target factor is a factor influencing the difference degree between the current charging state and the normal charging state; Determining a target voltage signal of the power supply device based on the first voltage signal, the second voltage signal, and a third voltage signal, wherein the target voltage signal is used to reduce the degree of difference; Calibrating the current to be calibrated of the power supply equipment based on the target voltage signal and temperature information corresponding to the first voltage signal, the second voltage signal and the third voltage signal respectively to obtain target current, wherein the temperature information is used for representing a temperature distribution state of a resistor, the resistor is arranged on a circuit from which the first voltage signal, the second voltage signal and the third voltage signal are respectively, the accuracy of the target current is larger than that of the current to be calibrated, and the target current is used for evaluating whether the power supply equipment is in a fault state.
2. The method of claim 1, wherein determining a target voltage signal for the power supply device based on the first voltage signal, the second voltage signal, and a third voltage signal comprises: Differential amplification processing is carried out on the first voltage signal, the second voltage signal and the third voltage signal to obtain a processing result; and determining the target voltage signal based on the processing result.
3. The method of claim 2, wherein performing differential amplification processing on the first voltage signal, the second voltage signal, and the third voltage signal to obtain processing results comprises: Respectively carrying out differential processing on the first voltage signal and the second voltage signal and the third voltage signal to obtain a first processing result and a second processing result, wherein the first processing result is used for representing the degree of difference between the first voltage signal and the third voltage signal, and the second processing result is used for representing the degree of difference between the second voltage signal and the third voltage signal; and amplifying the first processing result and the second processing result respectively to obtain the processing result, wherein the processing result comprises the first processing result after amplifying and the second processing result after amplifying, the difference degree corresponding to the first processing result after amplifying is larger than the difference degree corresponding to the first processing result before amplifying, and the difference degree corresponding to the second processing result after amplifying is larger than the difference degree corresponding to the first processing result before amplifying.
4. The method of claim 2, wherein determining the target voltage signal based on the processing result comprises: Performing common mode rejection processing on the third voltage signal based on the processing result to obtain a reject-ed third voltage signal, wherein the reject-ed third voltage signal has a smaller influence on the current state of charge than the voltage signal before rejection; And determining the target voltage signal based on the suppressed third voltage signal.
5. The method according to claim 2, wherein the method further comprises: determining a parasitic impedance of the power supply device based on the second voltage signal and the third voltage signal, wherein the parasitic impedance is used to affect an operational performance of the circuit; calibrating the current to be calibrated of the power supply device based on the target voltage signal and temperature information corresponding to the first voltage signal, the second voltage signal and the third voltage signal respectively, wherein obtaining the target current comprises: determining a temperature gradient of the resistor based on the temperature information; the target current is determined based on the temperature gradient, the parasitic impedance, and the target voltage signal.
6. The method of claim 5, wherein the parasitic impedance is a parasitic resistance, the parasitic resistance being a resistance in the circuit that affects the degree of difference, the determining the parasitic impedance of the power supply device based on the second voltage signal and the third voltage signal comprising: Determining a voltage signal difference between the second voltage signal and the third voltage signal, and a resistance difference between a resistance corresponding to the second voltage signal and a resistance corresponding to the third voltage signal; the parasitic resistance is determined based on the voltage signal difference and the resistance difference.
7. The method of claim 5, wherein the temperature information includes first temperature information for indicating a temperature distribution state of a resistor corresponding to the first voltage signal, second temperature information for indicating a temperature distribution state of a resistor corresponding to the second voltage signal, and third temperature information for indicating a temperature distribution state of a resistor corresponding to the third voltage signal, and determining a temperature gradient of the resistor based on the temperature information includes: determining average temperature information of both the second temperature information and the third temperature information; the temperature gradient is determined based on the first temperature information and the average temperature information.
8. The method of claim 5, the parasitic impedance being a parasitic resistance, the parasitic resistance being a resistance in the circuit that affects the degree of difference, determining the target current based on the temperature gradient, the parasitic impedance, and the target voltage signal, comprising: And executing a compensation calibration strategy on the current to be calibrated by using the temperature gradient, the parasitic resistance and the target voltage signal to obtain the target current, wherein the compensation calibration strategy is used for representing a rule for calibrating the current to be calibrated.
9. The method of any one of claims 1 to 8, wherein the circuit comprises a main detection circuit, a reference circuit, and a compensation circuit, the first voltage signal comprises a voltage signal across a resistor disposed on the main detection circuit, the second voltage signal comprises a voltage signal across a resistor disposed on the reference circuit, and the third voltage signal comprises a voltage signal across a resistor disposed on the compensation circuit.
10. The signal processing system of the battery power supply equipment is characterized by comprising a three-resistor detection network, a signal processing module and a microcontroller unit, wherein: The three-resistor detection network is used for determining a first voltage signal, a second voltage signal and a third voltage signal corresponding to power supply equipment of a battery, wherein the first voltage signal is used for representing the current charging state of the power supply equipment, the second voltage signal is used for representing the normal charging state of the power supply equipment, the third voltage signal is used for compensating the influence result of a target factor on the current charging state, and the target factor is a factor influencing the difference degree between the normal charging states of the current charging state; The signal processing module is used for determining a target voltage signal of the power supply equipment based on the first voltage signal, the second voltage signal and the third voltage signal, wherein the target voltage signal is used for reducing the difference degree; The microcontroller unit is configured to calibrate a current to be calibrated of the power supply device based on the target voltage signal and temperature information corresponding to the first voltage signal, the second voltage signal and the third voltage signal, so as to obtain a target current, where the temperature information is used to represent a temperature distribution state of a resistor, the resistor is disposed on a circuit from which the first voltage signal, the second voltage signal and the third voltage signal are respectively derived, an accuracy of the target current is greater than an accuracy of the current to be calibrated, and the target current is used to evaluate whether the power supply device is in a fault state.
11. The system of claim 10, further comprising a temperature sensing module, wherein, The temperature sensing module is configured to obtain the temperature information, where the temperature information includes first temperature information of a resistor corresponding to the first voltage signal, second temperature information of a resistor corresponding to the second voltage signal, and third temperature information of a resistor corresponding to the third voltage signal, the first temperature information is used to represent a temperature distribution state of the resistor corresponding to the first voltage signal, the second temperature information is used to represent a temperature distribution state of the resistor corresponding to the second voltage signal, and the third temperature information is used to represent a temperature distribution state of the resistor corresponding to the third voltage signal.
12. The system of claim 10, wherein the signal processing module comprises an operational amplifier, wherein, The operational amplifier is used for carrying out differential amplification processing on the first voltage signal, the second voltage signal and the third voltage signal to obtain a processing result, and determining the target voltage signal based on the processing result.
13. An electronic device comprising a processor and a memory, wherein, A memory for storing a computer program; A processor for executing a program stored on a memory for implementing the method of any one of claims 1-9.

Description

Signal processing method and system of battery power supply equipment and electronic equipment Technical Field The embodiment of the application relates to the technical field of charging fault detection, in particular to a signal processing method and system of power supply equipment of a battery and electronic equipment. Background Currently, for power supply devices (e.g., charging modules) of batteries (e.g., 12V lithium batteries), current detection methods in the related art rely on detecting a voltage drop across a resistor to indirectly reflect a loop current. However, the temperature drift phenomenon of the detection resistor, that is, the resistance of the detection resistor changes with the temperature change, and the uneven distribution of the wiring impedance of the printed circuit board (Printed Circuit Board, abbreviated as PCB) together form two major problems affecting the signal accuracy. The above problems lead to distortion of the collected current signal, and even cause the charging module to misjudge the current state when serious, trigger unnecessary protection mechanism or lead to low charging efficiency, thereby affecting the health and service life of the battery. Therefore, there is still a technical problem that the signal processing accuracy of the power supply device of the battery is low. Disclosure of Invention The embodiment of the application provides a signal processing method and system of battery power supply equipment and electronic equipment, aiming at solving the technical problem of low signal processing accuracy of the battery power supply equipment. According to an aspect of an embodiment of the present application, there is provided a signal processing method of a power supply device of a battery. The method comprises the steps of determining a first voltage signal, a second voltage signal and a third voltage signal corresponding to power supply equipment of a battery, wherein the first voltage signal is used for representing the current charging state of the power supply equipment, the second voltage signal is used for representing the normal charging state of the power supply equipment, the third voltage signal is used for compensating the influence result of a target factor on the current charging state, the target factor is a factor influencing the difference degree between the current charging state and the normal charging state, determining the target voltage signal of the power supply equipment based on the first voltage signal, the second voltage signal and the third voltage signal, wherein the target voltage signal is used for reducing the difference degree, and calibrating the current to be calibrated of the power supply equipment based on the temperature information corresponding to the first voltage signal, the second voltage signal and the third voltage signal respectively to obtain target current, wherein the temperature information is used for representing the temperature distribution state of a resistor, the accuracy of the target current is larger than that of the current to be calibrated when the resistor is deployed on a circuit from which the first voltage signal, the second voltage signal and the third voltage signal are respectively, and the target current is used for evaluating whether the power supply equipment is in a fault state or not. Optionally, determining the target voltage signal of the power supply device based on the first voltage signal, the second voltage signal and the third voltage signal comprises performing differential amplification processing on the first voltage signal, the second voltage signal and the third voltage signal to obtain a processing result, and determining the target voltage signal based on the processing result. Optionally, performing differential amplification processing on the first voltage signal, the second voltage signal and the third voltage signal to obtain processing results, wherein the processing results comprise a first processing result and a second processing result which are obtained by performing differential processing on the first voltage signal and the second voltage signal and the third voltage signal respectively, the first processing result is used for representing the difference degree between the first voltage signal and the third voltage signal, the second processing result is used for representing the difference degree between the second voltage signal and the third voltage signal, and the processing results are obtained by performing amplification processing on the first processing result and the second processing result respectively, wherein the processing results comprise a first processing result after amplification processing and a second processing result after amplification processing, the difference degree corresponding to the first processing result after amplification processing is larger than the difference degree corresponding to the first processing result before amplif