New energy automobile power battery pack liquid cooling system test method

Abstract

The invention discloses a new energy automobile power battery pack liquid cooling system test method. The method comprises the following steps: S1, setting up a test bench; S2, performing an air tightness test on the liquid cooling system of the power battery pack, and if the test is qualified, executing the next step; S3, performing a flow resistance test on the liquid cooling system of the power battery pack; S4, enabling the charging and discharging test cabinet of the new energy automobile power battery pack liquid cooling system test bench to charge and discharge the power battery pack, simulating the charging and discharging working conditions of the new energy automobile, and performing temperature control test on the liquid cooling system of the power battery pack; and S5, enabling the liquid cooling test machine of the new energy automobile power battery pack liquid cooling system test bench to recover the cooling liquid from the liquid cooling system of the power battery pack, and purging the liquid cooling system. According to the new energy automobile power battery pack liquid cooling system method, the sealing performance of the power battery pack liquid cooling system can be detected, the liquid leakage situation in the using process of the liquid cooling system is completely eradicated, and the product safety is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicle power batteries, in particular, the invention relates to a method for testing a liquid cooling system of a new energy vehicle power battery pack. Background technique [0002] In recent years, with the support of the country's continuous new energy policy, my country's key technologies for new energy vehicles have made significant progress. The cruising range of electric vehicles has increased from an average of about 160km in 2015 to an average of about 400km in 2020, which has led to the formation of power batteries. The power of the pack and the synchronous increase of charging and discharging power. Keeping the cells in the power battery pack working within a reasonable temperature range is a key condition to ensure the performance and safety of the power battery system. The liquid cooling system of the power battery pack has high heat dissipation efficiency and uniform heat dissipa...

AI Technical Summary

Problems solved by technology

[0003] In the process of design, development and manufacturing of power battery packs, there are problems such as insufficient functional testing of the battery liquid cooling system, and poor handling of the cooling liquid after testing, resulting in dripping and other problems.

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