Lithium ion battery testing device

Abstract

The invention relates to a lithium ion battery testing device, and the device comprises a heat preservation box which contains cooling liquid in which a tested battery is immersed, an input unit usedfor receiving a battery test working condition and a temperature threshold value input by a worker, a charging and discharging unit used for providing electric energy for the tested battery, a charge-discharge control unit used for generating a charge-discharge control instruction according to the battery test working condition so as to control the charge-discharge unit to output electric energy,a temperature measuring unit used for measuring the surface temperature of the measured battery and the environment temperature of the measured battery immersed in the cooling liquid, and a temperature control unit respectively connected with the input unit and the temperature measuring unit, communicated with the heat preservation box and used for controlling the temperature of the cooling liquidin the charging and discharging process of the battery according to the surface temperature, the environment temperature and the temperature threshold. The charging and discharging test of the lithium ion battery is realized, and the expected test temperature of the tested battery is maintained in the test process.

Description

technical field [0001] The invention relates to the field of battery testing, in particular to a lithium ion battery testing device. Background technique [0002] Lithium-ion batteries are an important source of power for new energy vehicles. In order to study the working characteristics of lithium-ion batteries, it is often necessary to conduct battery charge and discharge tests. In order to obtain the working characteristics of the battery at different working temperatures, it is necessary to control the temperature of the battery to realize the charge and discharge test of the battery at different battery temperatures. At present, the independent charge and discharge test system and independent temperature control box are mainly used to realize the charge and discharge test of lithium-ion batteries at different temperatures. However, in the actual testing process, the variation of the battery test current will lead to the fluctuation of the heat generated by the battery,...

AI Technical Summary

Problems solved by technology

If the air volume is too large, although it can maintain the stability of the battery temperature, it will cause energy waste when the battery heating power is small; on the contrary, if the air volume is too small, although it can reduce energy consumption, it cannot guarantee the battery operating temperature when the battery heats up quickly. Stablize

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