Hello, what are the factors that affect the estimation accuracy of battery state of charge? The factors that affect the estimation accuracy of battery state of charge are temperature, capacity attenuation and self-discharge. Battery power management is one of the core contents of battery management, which is of great significance to the control of the whole battery state and the prediction and estimation of the driving range of electric vehicles. At the same time, due to the nonlinear state of charge of power battery and the influence of many factors, the estimation and prediction methods of battery power are complicated, and it is difficult to accurately estimate the state of charge of power battery. The qualitative laws of factors affecting the estimation accuracy of battery state of charge are as follows:

1, temperature. The battery capacity will change at different temperatures, and the choice of temperature range and correction coefficient will directly affect the battery performance and available power.

2. Battery capacity attenuation. The capacity of the battery will gradually decrease during the cycle. Therefore, the correction conditions of electric quantity need to be constantly changed, which is also an important factor affecting the accuracy of the model.

3. Self-discharge. The chemical reaction inside the battery produces self-discharge phenomenon, which causes the loss of electricity when placed. The magnitude of self-discharge is mainly related to the ambient temperature and needs to be corrected according to the experimental data.