Power battery SOC (state of charge) estimation method under working condition environment
A power battery and working condition technology, which is applied in the direction of measuring electricity, measuring electrical variables, and testing electrical devices in transportation, etc. It can solve the problems of inaccurate calibration of battery available capacity and errors in estimation, and achieve rapid correction and accurate estimation Effect
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[0045] In this embodiment, a method for estimating the SOC of a power battery in a working environment, such as figure 1 As shown, the steps include,
[0046] S0. The battery system is powered on, and the battery system performs a power-on self-check to collect information such as battery temperature and voltage;
[0047] Judge whether the battery system data is stable, if it is unstable, return to continue self-test, if it is stable, go to the next step.
[0048] S1. Calibrate the battery capacity at the initial power-on temperature and substitute it into the coulomb calculation; the specific process is as follows figure 2 Shown, including:
[0049] S11. According to the temperature rise data of the battery system under working conditions, such as Figure 4 As shown, obtain the temperature rise values during the SOC conversion process greater than 30% in the figure, and calculate the average value of these temperature rise values;
[0050] S12. Add the initial temperature of the ba...
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