Liquid cooling temperature control and management method of power lithium ion battery

Abstract

The invention discloses a liquid cooling temperature control and management method of a power lithium ion battery. The liquid cooling temperature control and management method comprises the steps of: 1) acquiring temperature and current; 2) obtaining a highest temperature value, a lowest temperature value, greatest temperature difference and liquid cooling system inlet and outlet temperature difference; 3) judging whether the current is large or not and computing a working state 1; 4) judging whether the temperature of the battery is high or not, computing a working state 2; 5) judging whether temperature difference of the battery is too great or not and computing a working state 3; 6) judging whether the outlet temperature of a battery pack is too high or not and computing a working state 4; 7) judging whether the temperature difference of circulating medium at the inlet and outlet of the battery pack is too great or not and computing a working state 5; and 8) comparing the computed working state 1, the working state 2, the working state 3, the working state 4 and the working state 5 to obtain a working state with the best heat dissipation effect for setting. The liquid cooling temperature control and management method of the power lithium ion battery solves the problems that the temperature of the battery is too high and the local temperature difference is too great, and has the beneficial effects that the performance of the battery is improved and the service life of battery is prolonged.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a method for controlling and managing the liquid cooling temperature of a power lithium ion battery. Background technique [0002] Due to the increasing global energy crisis and environmental pollution, the development of the automobile industry must also adopt new solutions. Electric vehicles are the mainstream of new vehicles that have become worldwide. The advantages of high voltage, high specific energy, good cycle performance, clean and pollution-free lithium-ion batteries are considered to be the most promising power source for vehicles. [0003] The power lithium-ion battery provides driving force for the vehicle, and its performance greatly affects the performance of the vehicle. The power lithium-ion battery must work within a certain temperature range so that its performance will be at its optimum. For power lithium-ion batteries, the working performance is better at 15°C-35°...

AI Technical Summary

Problems solved by technology

However, how to effectively realize the cooling function of the liquid cooling device and ensure that the power battery works within a suitable temperature range while avoiding excessive local temperature of the battery is a problem that should be solved at present.

[0005] At present, there is no description or report of similar technology of the present invention, and similar porcelain materials at home and abroad have not been collected yet.

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