Static and dynamic state correction method of energy storage battery remaining capacity

Abstract

The present invention discloses a static and dynamic state correction method of an energy storage battery remaining capacity. The method is used to perform correction and estimation of the remaining capacity of the battery. The battery has a battery calibration total capacity. The method comprises the following steps of: calculating a temperature coefficient in the same temperature; calculating adischarge times coefficient in any discharge times in the same temperature; calculating a battery inner resistance of the battery and the battery inner voltage; and calculating the remaining capacityof the battery in the same temperature. Compared to the prior art, the static and dynamic state correction method is accurate in collected remaining capacity and is simple and reliable in implementation mode.

Description

technical field [0001] The invention relates to the field of calculating the remaining power of a battery, in particular to a dynamic and static correction method for the remaining power of an energy storage battery. Background technique [0002] There are two methods for correcting the remaining battery power in existing commercial battery management systems. The first method uses the method of dynamic integration to calculate the remaining battery capacity, and the second method uses the method of static voltage plus compensation to calculate the remaining battery capacity. When the first method is adopted, in order to consider the cost of the battery management system, the precision of the voltage sensor and current sensor generally used is too low, and the sampling speed of the chip used is low, so the values ​​of the sampled voltage and sampled current cannot be accurately measured, which leads to Dynamic integral accumulation error. When the second method is used, the...

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Problems solved by technology

When the first method is adopted, in order to consider the cost of the battery management system, the precision of the voltage sensor and current sensor generally used is too low, and the sampling speed of the chip used is low, so it is impossible to accurately measure the values ​​of the sampled voltage and sampled current, which leads to Dynamic integral accumulation error

When the second method is used, the battery model at 0 current is used as the benchmark, and then the actual capacity is corrected according to the temperature and each discharge depth. However, there is no more accurate battery model in actual application, and the battery model of each battery In addition, the present invention has no test current, is not sensitive to current charging and discharging, and will also affect the calculation of the remaining capacity of the battery

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