Balancing method based on lithium ion battery cell SOC and cell capacity
A technology of lithium-ion batteries and battery cells, applied in the direction of charge equalization circuit, arrangement of multiple synchronous batteries, battery circuit devices, etc., can solve problems such as inability to pick out, increase time and energy consumption, and increase the probability of equalization, etc. To achieve the effect of prolonging the life of the battery system, improving the balance efficiency, and improving the economy
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[0022] The present invention will be further described below in conjunction with specific embodiments: a method for equalizing lithium-ion battery monomer SOC and monomer capacity, the steps are as follows:
[0023] Step a) Detect the current capacity Celln_Cap of each battery cell in the battery system, and obtain the cell_Cap_Min of the battery cell with the lowest current capacity;
[0024] Step b) For the battery in the target battery system, use the preset target SOC as the target SOC Cell_Target_SOC;
[0025] Step c) Calculate the difference Celln _SOC_Diff between the current state of charge SOC Celln _SOC and the target SOC Cell_Target_SOC of each battery cell, that is, the difference Celln _SOC_Diff=the current state of charge SOC of the battery cell Celln _SOC–target SOC Cell_Target_SOC; and it is also necessary to calculate the lowest difference Cell_SOC_Diff_Target between the battery cell with the lowest current capacity Cell_Cap_Min and the target SOC Cell_Target...
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