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A power battery system balance control method and system

A power battery and system equalization technology, applied in secondary batteries, battery circuit devices, secondary battery repair/maintenance, etc., can solve the problems of high cost and low efficiency, reduce design and production costs, simplify circuit design, The effect of saving maintenance time and cost

Active Publication Date: 2019-04-09
江苏和中普方新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a power battery system balance control method and system, aiming to solve the problems of high cost and low efficiency of the existing balance method

Method used

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  • A power battery system balance control method and system
  • A power battery system balance control method and system
  • A power battery system balance control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like figure 1 As shown, this embodiment proposes a power battery system balance control method, the method includes:

[0051] S1. Detect and record the cell voltage at the charging end of each cell.

[0052] Specifically, detect the charging end cell voltage V 1 , V 2 ...V n , where the highest voltage is the cell p, 1≤p≤n, the charging terminal voltage is V p , and for the highest cell p, the voltage V 1 , V 2 ...V p ...V n time t 1 , t 2 ,... t p ... t n , and the rated capacity of the battery system is C 0 .

[0053] S2. Extract the highest charging end cell voltage among all charging end cell voltages, and calculate the remaining charging capacity of each cell when it is charged from its own charging end cell voltage to the highest charging end cell voltage.

[0054] Specifically, calculate V 1 , V 2 ...V p-1 , V p+1 ...V n charge to V p Remaining charge capacity, for example, cell 1 by voltage V 1 charge to V p The remaining charge capacity is ...

corresponding Embodiment 1

[0067] Corresponding to Embodiment 1, this embodiment proposes a power battery system balance control system, such as image 3 As shown, the system includes:

[0068] The voltage detection module is used to detect and record the battery cell voltage at the charging end of each battery cell;

[0069] The remaining charging capacity calculation module is used to extract the highest charging end cell voltage among all charging end cell voltages, and calculate the time when each cell is charged from its own charging end cell voltage to the highest charging end cell voltage remaining charge capacity;

[0070] an average value calculation module, configured to calculate the average value of the remaining charging capacity;

[0071] The balance control module is used to calculate the remaining charging capacity in the remaining charging capacity calculation module according to the remaining charging capacity and the average value of each battery cell in the remaining charging capac...

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Abstract

The invention relates to a balancing control method and system for a power battery system, relates to the field of power battery balancing control and aims at solving the problems of high cost and low efficiency of an existing balancing method. The method comprises the steps of calculating mean residual capacity of various battery cores of the power battery system through differentiation of residual battery charging capacity and voltage appearing at the charging tail end of the power battery system, calibrating the mean residual capacity of the battery cores of the power battery system, controlling the battery cores of which the residual capacity is higher than the mean capacity in the power battery system, and carrying out dissipation discharging on the battery cores with high the residual capacity in the next charge-discharge cycle process. The dissipation balancing efficiency is greatly improved and the original daily balancing time is prolonged to 8-10 hours from a few minutes.

Description

technical field [0001] The invention relates to the field of power battery balance control, in particular to a power battery system balance control method and system. Background technique [0002] During the operation of the power battery, the consistency and differentiation will gradually appear. At present, for the consistency problem of the battery system, the common solution is to use equipment to balance manually; the other is to carry out balance control through the battery management system. The balance control is divided into two parts: There are two kinds, one is dissipative passive balance, and the other is active balance. [0003] Manual equalization using equalization equipment will consume a lot of manpower and financial resources and is inefficient, and the overall equalization time is too slow. Active equalization requires high chip design and high management system costs; traditional passive equalization is performed at the end of charging, but the passive e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/48
CPCH01M10/42H01M10/4257H01M10/48H01M2010/4271Y02E60/10
Inventor 胡大海顾辉肖冬梅
Owner 江苏和中普方新能源科技有限公司
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