CN-121989754-A - Power matching method and device for power conversion power battery and computer readable storage medium

CN121989754ACN 121989754 ACN121989754 ACN 121989754ACN-121989754-A

Abstract

The invention provides a power matching method, a device and a computer readable storage medium of a power conversion power battery, wherein the method determines the maximum driving power and the continuous driving power of a vehicle through the instantaneous maximum power and the continuous power of the vehicle starting capability, the climbing capability, the accelerating performance and the highest vehicle speed calculation requirement, so as to calculate the peak discharging power of the power conversion power battery and the continuous discharging power of the power battery.

Inventors

WU QIANQIAN
SUN YONGJIANG
HONG MINGHUI
CHENG JIAN
ZHU PENGPENG

Assignees

奇瑞商用车（安徽）有限公司

Dates

Publication Date: 20260508
Application Date: 20260313

Claims (10)

1. The power matching method of the power conversion battery is characterized by comprising the following steps of: (1) Calculating a first driving power required by the battery to be replaced when the climbing performance is met; (2) Calculating a second driving power required by the battery to be replaced when the acceleration performance is met; (3) Calculating a third driving power required by the battery for replacing the electric power when the highest vehicle speed performance is met; (3) And taking the maximum value of the first driving power, the second driving power and the third driving power as the driving power required by the power conversion battery, and determining the discharging power of the power conversion battery.
2. The power matching method of a battery according to claim 1, wherein the driving power includes a peak driving power and a continuous driving power, wherein the peak driving power is a maximum driving power required for the battery to be replaced when the climbing performance, the accelerating performance and the maximum vehicle speed are satisfied, and the continuous driving power is a maximum continuous driving power required for the battery to be replaced when the climbing performance, the accelerating performance and the maximum vehicle speed are satisfied.
3. The power matching method of a battery as claimed in claim 2, wherein the first peak drive power required by the battery to meet hill climbing performance is calculated based on the designed maximum hill climbing gradient and the first vehicle speed at the maximum hill climbing gradient The calculation formula is specifically as follows: ; Wherein, the Indicating the maximum hill climbing gradient of the vehicle design, Representing a first vehicle speed of the vehicle design at a maximum hill climb gradient, The quality of the whole vehicle is represented, Indicating the acceleration of gravity and, The coefficient of rolling resistance is represented by, Representing the mechanical efficiency of the transmission system, The air resistance coefficient is represented by the air resistance coefficient, Representing the frontal area.
4. A power matching method for a battery as claimed in claim 2, characterized in that the second peak drive power of the battery is calculated on the basis of the starting speed of the vehicle design and the starting time to reach the starting speed The calculation formula is specifically as follows: ; Wherein, the Representing a second peak drive power value of the power, Indicating the start-up speed of the vehicle design, Indicating the time for the vehicle design to reach start-up vehicle speed from zero vehicle speed, Indicating the conversion coefficient of the rotational mass of the automobile.
5. The power matching method of a battery according to claim 2, wherein the third peak driving power is calculated based on an acceleration capability during an acceleration time of a vehicle design The calculation is specifically as follows: ; Wherein, the Indicating the time of acceleration of the vehicle design The vehicle speed increment in the vehicle speed sensor.
6. A power matching method for a battery as claimed in claim 2, wherein the fourth peak drive power is calculated from the instantaneous maximum vehicle speed of the vehicle design The calculation is specifically as follows: ; wherein, the Representing the instantaneous maximum vehicle speed of the vehicle design.
7. The power matching method of a battery as claimed in claim 2, wherein the first continuous drive power of the battery is calculated based on a designed continuous hill climbing gradient and a second vehicle speed at the continuous hill climbing gradient The calculation formula is specifically as follows: ; Wherein, the Indicating the continuous hill climbing gradient of the vehicle design, A second vehicle speed at a sustained hill climbing grade indicative of the vehicle design.
8. A power matching method for a battery as claimed in claim 2, wherein the second continuous driving power is calculated based on a continuous maximum vehicle speed of the vehicle design The calculation formula is as follows: ; wherein, the Representing a sustained maximum vehicle speed for the vehicle design.
9. A power matching device for a battery for converting electric power, said device comprising: A peak driving power determining unit and a continuous driving power determining unit, a power converting unit connected with the peak driving power determining unit and the continuous driving power determining unit, wherein, The peak driving power determining unit is used for determining peak driving power required by the battery for changing the power of the power battery to meet the climbing performance, the accelerating performance and the highest vehicle speed performance and transmitting the peak driving power to the power converting unit; A continuous driving power determining unit for determining a continuous driving power required by the battery for changing the power required by the climbing performance and the highest vehicle speed performance, and transmitting the continuous driving power to the power converting unit; The power conversion unit is used for respectively converting the received peak driving power and the continuous driving power into peak discharge power and continuous discharge power of the power conversion battery.
10. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program for execution by a processor to implement the power matching method of a power conversion cell according to any one of claims 1 to 8.

Description

Power matching method and device for power conversion power battery and computer readable storage medium Technical Field The invention belongs to the technical field of power batteries, and particularly relates to a power matching method and device of a power battery and a computer readable storage medium. Background Along with the development of express delivery trade, terminal delivery is increasingly greater to low-speed pure electric vehicle type demand that trades, and this motorcycle type has solved duration anxiety in the express delivery process through changing power battery, promotes efficiency to with low costs, current facility, suitability are strong, make low-speed pure electric vehicle type that trades become one of the important motorcycle types of each enterprise development study. The existing low-speed pure electric vehicle type power battery is small in capacity and small in discharge power, so that the low-speed pure electric vehicle type power battery has the problems of weak acceleration and difficult climbing in the distribution and use process, one important reason is that the discharge power of the power battery cannot meet the requirements of a motor and a vehicle, and the power battery is matched with the motor with enough parameters, so that the motor cannot exert the power capacity of the motor due to the small capacity and insufficient power of the power battery. Disclosure of Invention In view of the above, the present application provides a power matching method for a battery for a power conversion device, which aims to improve at least one of the above problems. Specifically, the method comprises the following technical scheme: in one aspect, an embodiment of the present application provides a power matching method for a power conversion power battery, where the method specifically includes: (1) Calculating a first driving power required by the battery to be replaced when the climbing performance is met; (2) Calculating a second driving power required by the battery to be replaced when the acceleration performance is met; (3) Calculating a third driving power required by the battery for replacing the electric power when the highest vehicle speed performance is met; (3) And taking the maximum value of the first driving power, the second driving power and the third driving power as the driving power required by the power conversion battery, and determining the discharging power of the power conversion battery. In some embodiments of the present invention, the drive power includes a peak drive power that is a maximum drive power required to replace the power cell when the hill climbing performance, the acceleration performance, and the maximum vehicle speed are satisfied, and a continuous drive power that is a maximum continuous drive power required to replace the power cell when the hill climbing performance, the acceleration performance, and the maximum vehicle speed are satisfied. In some embodiments of the invention, a first peak drive power required by the battery to meet hill climbing performance is calculated based on a designed maximum hill climbing grade and a first vehicle speed at the maximum hill climbing gradeThe calculation formula is specifically as follows: ; Wherein, the Indicating the maximum hill climbing gradient of the vehicle design,Representing a first vehicle speed of the vehicle design at a maximum hill climb gradient,The quality of the whole vehicle is represented,Indicating the acceleration of gravity and,The coefficient of rolling resistance is represented by,Representing the mechanical efficiency of the transmission system,The air resistance coefficient is represented by the air resistance coefficient,Representing the windward area, In some embodiments of the invention, the second peak drive power of the battery is calculated based on the vehicle designed launch speed and the launch time to reach the launch speedThe calculation formula is specifically as follows: ; Wherein, the Representing a second peak drive power value of the power,Indicating the start-up speed of the vehicle design,Indicating the time for the vehicle design to reach start-up vehicle speed from zero vehicle speed,Indicating the conversion coefficient of the rotational mass of the automobile. In some embodiments of the invention, the third peak drive power is calculated from the acceleration capability during the acceleration time of the vehicle designThe calculation is specifically as follows: ; Wherein, the Indicating the time of acceleration of the vehicle designThe vehicle speed increment in the vehicle speed sensor. In some embodiments of the invention, the fourth peak drive power is calculated from the instantaneous maximum vehicle speed of the vehicle designThe calculation is specifically as follows: ; wherein, the Representing the instantaneous maximum vehicle speed of the vehicle design. In some embodiments of the invention, the first continuous drive power of the ba