CN-122008947-A - Battery power control method and device and electronic equipment

CN122008947ACN 122008947 ACN122008947 ACN 122008947ACN-122008947-A

Abstract

The battery power control method, the battery power control device and the electronic equipment provided by the embodiment of the application acquire battery parameters of the power battery in the current state, wherein the battery parameters comprise a first battery power threshold value, a plurality of motor driving powers corresponding to the discharging powers are determined based on system efficiency in the process of changing the discharging power of the power battery from zero to the first battery power threshold value, the discharging power corresponding to the maximum motor driving power is determined as a second battery power threshold value, and the actual discharging power of the power battery is limited based on the second battery power threshold value in the running process of the vehicle. By cooperating the characteristics of the power battery and the driving motor, the upper limit of the battery discharge power is dynamically adjusted on the premise of ensuring the safety of the battery, so that the final output power of the whole vehicle driving system is maximized, and the energy utilization efficiency is improved while the dynamic performance of the vehicle is improved.

Inventors

WANG LUYANG
SUN WEINAN
ZHANG GUANGYA
LI RUIKE
CHEN CHENG

Assignees

上汽通用五菱汽车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260311

Claims (10)

1. A battery power control method, comprising: Acquiring battery parameters of the power battery in a current state, wherein the battery parameters comprise a first battery power threshold value; Determining motor driving power corresponding to a plurality of discharging powers based on system efficiency in the process of changing the discharging power of the power battery from zero to the first battery power threshold; Determining a discharge power corresponding to the maximum motor driving power as a second battery power threshold; During vehicle operation, the actual discharge power of the power battery is limited based on the second battery power threshold.
2. The method of claim 1, wherein the battery parameters further comprise an open circuit voltage and a total internal resistance; In a process of changing the discharge power of the power battery from zero to the first battery power threshold, determining motor driving power corresponding to a plurality of discharge powers based on system efficiency, including: Calculating battery working voltages corresponding to a plurality of discharging powers based on the open-circuit voltage and the total internal resistance in the process of changing the discharging power of the power battery from zero to the first battery power threshold value; And determining motor driving power corresponding to the plurality of discharging powers based on system efficiency corresponding to different battery operating voltages.
3. The method of claim 2, wherein determining motor drive power for a plurality of discharge powers based on system efficiencies for different battery operating voltages comprises: Acquiring system efficiency corresponding to different battery power voltages based on a pre-stored mapping relation; the discharge power is multiplied by the corresponding system efficiency to obtain the corresponding motor driving power.
4. The method of claim 1, wherein limiting the actual discharge power of the power battery based on the second battery power threshold comprises: in response to the demand power for the power battery not exceeding the second battery power threshold, setting a discharge power of the power battery to be the same as the demand power; In response to the demand power for the power battery being greater than the second battery power threshold, the discharge power of the power battery is set to be the same as the second battery power threshold.
5. The method according to claim 2, wherein the method further comprises: When detecting that the discharge power of the power battery is greater than/equal to the product of the second battery power threshold and the power coefficient, and the battery working voltage is greater than a voltage threshold, increasing the second battery power threshold; the power coefficient is between 0 and 1, and the voltage threshold is a battery working voltage corresponding to the second battery power threshold.
6. The method of claim 5, wherein during increasing the second battery power threshold, the adjusting is stopped when either of the following conditions is reached: the discharge power of the power battery is less than the product of the second battery power threshold and the power coefficient, or The battery operating voltage is less than/equal to the voltage threshold, or The second battery power threshold is equal to the first battery power threshold.
7. The method of claim 2, wherein the obtaining battery parameters of the power battery in the current state comprises: Acquiring the current temperature and the state of charge of the power battery; and determining the open-circuit voltage, the total internal resistance and the first battery power threshold value of the power battery at the current temperature and the state of charge through table lookup.
8. A battery power control apparatus, comprising: the acquisition module is used for acquiring battery parameters of the power battery in the current state, wherein the battery parameters comprise a first battery power threshold value; The determining module is used for determining motor driving power corresponding to a plurality of discharging powers based on system efficiency in the process of changing the discharging power of the power battery from zero to the first battery power threshold value; the determining module is further configured to determine a discharge power corresponding to the maximum motor driving power as a second battery power threshold; And the control module is used for limiting the actual discharging power of the power battery based on the second battery power threshold value during the running process of the vehicle.
9. An electronic device comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, cause the electronic device to perform the method of any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer readable storage medium is located to perform the method of any one of claims 1 to 7.

Description

Battery power control method and device and electronic equipment Technical Field The present application relates to the field of computer technologies, and in particular, to a battery power control method and apparatus, and an electronic device. Background The whole power performance of the current electric vehicle or hybrid vehicle is restricted by the characteristics of a power battery and a driving motor, wherein the power battery has an inherent characteristic that the larger the discharging current is, the lower the working voltage is output to the outside under the same charge state and temperature. Meanwhile, the efficiency characteristics of the driving motor are closely related to the input voltage, and when the battery voltage drops to a low level due to a large current discharge, the operation efficiency of the motor may be significantly reduced. The coupling relation causes a systematic problem that under certain high-power demand scenes, even if the battery provides larger discharge power, the final output power of the driving motor can not be effectively improved due to the reduction of the output voltage of the battery, and even energy waste is caused, so that the dynamic performance and energy efficiency performance of the whole vehicle are restricted. Disclosure of Invention In view of this, the present application provides a battery power control method, apparatus and electronic device, so as to solve the problems of limited actual output power and insufficient energy utilization of the whole vehicle system caused by the reduced efficiency of the driving motor due to the reduced battery voltage in the high-power discharge scenario of the battery. In a first aspect, an embodiment of the present application provides a battery power control method, including: Acquiring battery parameters of the power battery in a current state, wherein the battery parameters comprise a first battery power threshold value; Determining motor driving power corresponding to a plurality of discharging powers based on system efficiency in the process of changing the discharging power of the power battery from zero to the first battery power threshold; Determining a discharge power corresponding to the maximum motor driving power as a second battery power threshold; During vehicle operation, the actual discharge power of the power battery is limited based on the second battery power threshold. In an alternative embodiment, the battery parameters further include an open circuit voltage and a total internal resistance; In a process of changing the discharge power of the power battery from zero to the first battery power threshold, determining motor driving power corresponding to a plurality of discharge powers based on system efficiency, including: Calculating battery working voltages corresponding to a plurality of discharging powers based on the open-circuit voltage and the total internal resistance in the process of changing the discharging power of the power battery from zero to the first battery power threshold value; And determining motor driving power corresponding to the plurality of discharging powers based on system efficiency corresponding to different battery operating voltages. In an alternative embodiment, the determining motor driving power corresponding to the plurality of discharging powers based on system efficiency corresponding to different battery operating voltages includes: Acquiring system efficiency corresponding to different battery power voltages based on a pre-stored mapping relation; the discharge power is multiplied by the corresponding system efficiency to obtain the corresponding motor driving power. In an alternative embodiment, said limiting the actual discharge power of the power battery based on said second battery power threshold comprises: in response to the demand power for the power battery not exceeding the second battery power threshold, setting a discharge power of the power battery to be the same as the demand power; In response to the demand power for the power battery being greater than the second battery power threshold, the discharge power of the power battery is set to be the same as the second battery power threshold. In an alternative embodiment, the method further comprises: When detecting that the discharge power of the power battery is greater than/equal to the product of the second battery power threshold and the power coefficient, and the battery working voltage is greater than a voltage threshold, increasing the second battery power threshold; the power coefficient is between 0 and 1, and the voltage threshold is a battery working voltage corresponding to the second battery power threshold. In an alternative embodiment, during the increasing of the second battery power threshold, the adjustment is stopped when either of the following conditions is reached: the discharge power of the power battery is less than the product of the second battery power threshold and