Method for detecting low soc and high soc of single battery

The method for detecting the low soc and high soc of single battery is as follows: 1. The discharge experiment method is the most reliable SOC estimation method, and the product of discharge current and time is the remaining power.

The discharge experiment method is often used in the laboratory and is suitable for all batteries. But it has two obvious shortcomings: first, it needs a lot of time; Second, the work carried out by the battery should be interrupted.

The discharge experiment method is not suitable for running electric vehicles, but can be used for battery maintenance of electric vehicles. 2. The ampere-hour measurement method is the most commonly used SOC estimation method.

If the initial state of charge and discharge is SOCO, then the SOC of the current state is (5-3), where CN is the rated capacity; I is the battery current; η is the charging and discharging efficiency, not a constant. Problems in the application of ampere-hour measurement method: inaccurate current measurement will cause SOC calculation errors, which will become more and more serious over time; The charging and discharging efficiency of the battery should be considered; In the case of high temperature and severe current fluctuation, the error is large.