Patent ID: 9417289
Filing Date: 2016-08-16
CPC Classification: G01R

Claim Text:
1. A method for collecting voltage differential parameters of individual battery cells in a battery pack, wherein, a reference voltage is provided, the reference voltage is compared with an actual voltage of each individual battery cell at a same moment to obtain a relative voltage difference value between the actual voltage of each individual battery cell and the reference voltage at the current moment; and an actual voltage difference value between the actual voltage of each individual battery cell and an actual average voltage value of the actual voltages of all individual battery cells is determined according to the relative voltage difference value, and each actual voltage difference value is used for representing the voltage differential parameter of the individual battery cell relative to a battery system, wherein, the actual voltage difference value between the voltage of each individual battery cell and the mean actual voltage value of the voltages of all individual battery cells is determined according to each relative voltage difference value, specifically: the relative voltage difference value of the voltage of each individual battery cell is added with the reference voltage to obtain the actual voltage value of the voltage of each individual battery cell, respectively; the arithmetic mean value of the actual voltage values of all individual battery cells is calculated as a mean actual voltage value; and an absolute difference value between the actual voltage value of each individual battery cell and the mean actual voltage value is calculated as an actual voltage difference value between the actual voltage of each individual battery cell and the mean actual voltage value.