Method for predicting heat production power of battery

Abstract

The invention relates to the technical field of lithium battery manufacturing, in particular to a method for predicting heat production power of a battery, which comprises the following steps of: at a plurality of specific temperatures, respectively testing average heat production power of charging and discharging of the battery at a plurality of specific multiplying powers; based on the data obtained in the testing step, a first fitting relational expression of the average heat production power and the temperature under the fixed multiplying power is established; based on the data obtained in the testing step, a second fitting relational expression of the average heat production power and the multiplying power at the fixed temperature is established; and based on the first fitting relational expression and / or the second fitting relational expression, predicting the average heat production power of the battery under any target temperature and target multiplying power in the applicable temperature interval and multiplying power interval. By establishing a simple quadratic fitting relational expression among the average heat production power, the temperature and the multiplying power, the limitation of dependence on a special device or a complex model in the prior art is effectively overcome.

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