Thermal runaway visualizing test and analysis system for power battery

Abstract

The invention discloses a thermal runaway visualizing test and analysis system for a power battery. A hermitic environmental bin is arranged at the middle end of a stander; a power distribution box is arranged at the top end of the stander; a main control program is arranged in the power distribution box; a refrigerating unit is arranged at the bottom end of the stander; a refrigerating evaporator of the refrigerating unit is connected with the hermitic cavity; a heater for heating the hermitic cavity is arranged in the environmental bin; an air supplementing fan and a detachable schlieren photographing device are arranged on the side surface of the environmental bin; a pressure sensor, an infrared sensor, an exhaust assembly and a pressure release safety valve are also arranged on the surface of the environmental bin. The thermal runaway visualizing test and analysis system can perform thermal analysis and thermal runaway (combustion) analysis respectively; the main control program can automatically synchronize the temperature in the environmental bin according to the surface temperature of the battery sample; the whole automation degree is high, the precision of test data can be guaranteed, and the safety is high; the schlieren photographing device is configured to observe and photograph a combustion phenomenon, to precisely test data of a combustion status and collect and analyze combusted gas.

Description

technical field [0001] The invention relates to the field of test equipment, in particular to a visual test and analysis system for power battery thermal runaway. Background technique [0002] The heating of the battery during charging and discharging may damage the battery, and even cause potential safety hazards such as burning and explosion. Therefore, it is necessary to analyze the thermal runaway during the charging and discharging process of the battery. The traditional method is to charge and discharge in a space as closed as possible, and finally calculate the calorific value of the battery according to the specific heat of the medium in the closed space and the temperature in the space. The traditional method The airtight space does not have the temperature synchronization function, and there will be a certain amount of heat loss in the airtight space. The heat loss will directly affect the calculation results, resulting in large errors and inaccurate test data. ...

AI Technical Summary

Problems solved by technology

In the traditional method of collecting combustion gas, the gas collection is impure, usually mixed with some air, and it is impossible to determine when the battery is in the best combustion state. In addition, the traditional method will directly discharge toxic gas to the exhaust of the workshop laboratory system, which may lead to safety accidents

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