A battery equalization enabling method, device, storage medium and battery pack

Abstract

Embodiments of the present invention provide a battery balancing enabling method, device, storage medium, and battery pack. By judging whether the balancing command is received; if it is judged that the balancing command is not received, it is judged whether the cell type of the battery cell includes a lithium iron phosphate cell; if it is judged that the cell type includes a lithium iron phosphate cell, it is judged that the measured cell Whether the change value of the state of charge of the battery is less than the specified threshold; if it is judged that the change value of the state of charge is less than the specified threshold, judge whether the remaining balance capacity of the obtained battery cell is greater than the set calibration capacity; if it is determined that the remaining balance capacity is greater than the calibration capacity, and enable the balancing of battery cells. In the embodiment of the present invention, when the change value of the state of charge of the battery cell of the lithium iron phosphate battery cell is less than the specified threshold and the remaining balance capacity is greater than the calibrated capacity, the battery cell is enabled for balance, which improves the efficiency of battery balance enable. Turn on the frequency, thereby improving the balance effect of the battery.

Description

【Technical field】 [0001] The present invention relates to the technical field of batteries, and in particular to a battery equalization enabling method, device, storage medium and battery pack. 【Background technique】 [0002] As the auxiliary or main power source of new energy vehicles, the performance of batteries directly affects the performance of new energy vehicles. The battery is composed of different numbers of battery cells connected in series. Because the battery cells are affected by factors such as ambient temperature and humidity during the manufacturing process, there are certain differences between the battery cells in the same battery when they leave the factory. For example, There are differences in performance parameters such as capacity, voltage, and charge-discharge rate of the battery cells, and these differences will be accompanied by the cycle charge and discharge of the battery during the use of the new energy vehicle, and the different working tempera...

AI Technical Summary

Problems solved by technology

The battery is composed of different numbers of battery cells connected in series. Because the battery cells are affected by factors such as ambient temperature and humidity during the manufacturing process, there are certain differences between the battery cells in the same battery when they leave the factory. For example, There are differences in performance parameters such as capacity, voltage, and charge-discharge rate of the battery cells, and these differences will be accompanied by the cycle charge and discharge of the battery during the use of the new energy vehicle, and the different working temperature environments of the battery cells inside the battery, etc. Factors are further increased, resulting in the imbalance of each battery cell in the same battery

[0003] In the related art, the balancing effect of the battery cells is achieved by calculating the balancing time in real time through the measured balancing current, but the balancing current in the related technology is constant, and using the constant balancing current to calculate the balancing time is prone to excessive balancing. Reduced battery balancing effect

Images