A power battery test equipment and defrosting method

Abstract

The invention relates to the field of testing equipment, and discloses a power battery testing equipment and a defrosting method. The power battery test equipment includes a test air duct, a first refrigeration system, a second refrigeration system and a plate heat exchanger, the test air duct is used to simulate the test environment of the power battery, and the first refrigeration system is arranged on the low temperature side of the test air duct , the second refrigeration system is set on the high temperature side of the test air duct, the first refrigeration system communicates with the second refrigeration system through a plate heat exchanger, when the ambient temperature in the test air duct is greater than or equal to the preset temperature, the first refrigeration system alone In operation, when the ambient temperature in the test air duct is lower than the preset temperature, the first refrigeration system and the second refrigeration system operate simultaneously. The invention can independently judge and execute the defrosting action, avoiding the operation burden caused by the long-term frosting of the equipment and reducing the cooling effect, while maintaining a relatively constant temperature with small temperature fluctuations, and the user can still perform power battery tests normally during the defrosting period.

Description

technical field [0001] The invention relates to the field of test equipment, in particular to a power battery test equipment and a defrosting method. Background technique [0002] Frost is a sublimation phenomenon produced by water vapor when the temperature is very low, similar to snow. Scientifically, frost is composed of ice crystals, and the appearance process of dew is the same. It is the phenomenon of water precipitation from the air when the relative humidity in the air arrives. In the process of simulating the ultra-low temperature test environment, the high and low temperature test chamber will inevitably cause the water to cool to crystallize and form frost due to changes in temperature and humidity. If it is not defrosted in time, thick ice will form, which may cause The operating burden of the refrigeration compressor will also greatly reduce the refrigeration effect, thereby affecting the test. [0003] Under normal circumstances, the high and low temperature ...

AI Technical Summary

Problems solved by technology

However, the environmental test of the power battery usually opens the door to place the product, and the box is often opened, the humidity in the box will increase, and it is easier to frost. Conventional electric heating defrost, using hot gas bypass to control defrosting, the temperature in the box will drop. There are large fluctuations, which affect the user's test results

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