Battery SOC estimation algorithm

Abstract

A battery SOC estimation algorithm, comprising: obtaining the maximum SOC value and the minimum SOC value of the battery, and calculating the target SOC value according to the maximum SOC value and the minimum SOC value; obtaining the current SOC display value of the SOC display module and calculating the The difference between the current SOC display value and the target SOC value, and compare the difference with the preset display threshold; determine the update rate of the current SOC display value during the charging and discharging process according to the comparison result, so as to ensure that the displayed SOC value changes Stable, prevents the phenomenon of SOC display value jumping, and improves user experience.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a battery SOC estimation algorithm. Background technique [0002] SOC (that is, the state of charge, which refers to the ratio of the remaining capacity of the battery to its capacity when it is fully charged), as a parameter to measure the remaining capacity of the battery pack, plays a very important role for the driver. If the remaining capacity of the battery cannot be accurately grasped, it may Cause the electric car to stop the risk on the road because of no electricity. In order to accurately measure the remaining power of the battery pack, there are currently some leading battery management systems (BMS), in which SOC (state of charge) is the core technology of the BMS. [0003] The SOC estimation algorithm of the battery consists of three parts: SOC calculation, SOC correction, and SOC display. After the SOC correction module corrects the SOC value, the SOC display module ou...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, it is necessary to provide a battery SOC estimation algorithm for the problem of poor user experience caused by the jump of the SOC display value in the prior art

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