Circular flow air cooling heat radiation device of power batteries

Abstract

The invention discloses a circular flow air cooling heat radiation device of power batteries. The device comprises a battery box with a built-in supporting plate, a stepping fan, a temperature sensor and a control device; a top air outlet, an air inlet and a bottom air outlet are arranged at one side of the battery box from top to bottom; the air inlet is used for inputting air in the battery box through the stepping fan; electronic control valves are respectively arranged on the top air outlet, the bottom air outlet and the air inlet channel in the battery box; the control device is connected to the temperature sensor and each valve circuit and is used for controlling the switching of each valve according to the temperature difference value of each part of the power battery collected by the temperature sensor; and the flow paths of the air in the battery box are switched through controlling the switching of each valve. According to the device of the invention, the switching of each valve is controlled according to the temperature information of the battery set obtained by the temperature sensor; the cooling air directions of the battery set are circularly switched, thus ensuring that the highest temperature and the temperature difference of the battery set is located in a normal range; and the good temperature conformity of the battery set is realized.

Description

Technical field [0001] The invention relates to a circulating air-cooled heat dissipation device for a power battery, in particular to control the switch of an inlet and outlet valve to achieve the purpose of circulating air-cooled heat dissipation for the power battery. Background technique [0002] With the gradual introduction of electric vehicles to the market, the thermal safety issues of power batteries in electric vehicles are gradually exposed. In electric vehicles, power batteries often need to be charged and discharged with large currents, during which a large amount of heat including Joule heat, reaction heat and polarization heat will be generated. The space in the car is small. Usually a large number of single cells in the battery pack are closely arranged, and the accumulated heat is difficult to discharge. The temperature of the battery may exceed the normal range during long-term operation. At the same time, due to the difference in spatial location, each single c...

AI Technical Summary

Problems solved by technology

Existing air-cooled heat dissipation devices generally adopt a unidirectional serial or parallel ventilation method, which may easily cause the local temperature of the battery pack to be too high or the temperature distribution to be uneven, and the heat dissipation effect of the battery pack cannot be guaranteed

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