Protection device for battery pack of new energy automobile

Abstract

The invention discloses a protection device for a battery pack of a new energy automobile. The protection device comprises a battery box, wherein a lower support strip plate, an upper support strip plate and a grid plate are arranged in the battery box; the grid plate is distributed at the bottom end of an inner cavity of the battery box in a square way; the bottom end of the grid plate is fixedlywelded with the center of the bottom end of the battery box; the lower support strip plate is fixedly welded at the bottom end of the inner cavity of the battery box in the grid plate; the side end of the lower support strip plate is fixedly welded with the grid plate. The protection device for the battery pack of the new energy automobile has the advantages that when the automobile is driven insunny days and does not encounter with water pits, a cover plate and a plug valve are opened to exchange heat with outside cold air flow to carry away heat, and the air cooling type is matched with the water cooling type of the automobile self, so that the good heat radiating property is realized; when the automobile is driven in rainy days or encounters with water pits, the cover plate is covered, and the plug valve is closed, so that the outside water is prevented from entering the battery box, and the short-circuiting of the battery of the battery box due to water is avoided; the whole heatradiating property is better, and the waterproof effect is good.

Description

technical field [0001] The invention relates to a new energy vehicle, in particular to a protection device for a battery pack of a new energy vehicle. Background technique [0002] According to incomplete statistics, in 2016, there were a total of 29 new energy vehicle fire accidents reported in China, with a total of 40 vehicles. According to the statistics of domestic new energy vehicle fire accidents, the main causes of battery fire include the following two points. During the process, the water is flooded, and the battery circuit is short-circuited after the battery is immersed in water, causing a fire. Second, during the long-term use of the battery, the temperature continues to rise, causing the circuit to soften and eventually ignite naturally; [0003] Most of the problems solved by the existing battery pack protection devices are heat dissipation problems. Patent No. CN201721338684.1 is a heat dissipation device for new energy vehicle battery packs. Although the mo...

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Problems solved by technology

[0005] In order to solve the problem that the battery pack of the existing new energy vehicle is easy to enter water and cause short circuit, and the heat dissipation performance is not good, the purpose of the present invention is to provide a protect

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