Electric vehicle power battery box with efficient thermal dissipation

Abstract

The invention discloses an electric vehicle power battery box with efficient thermal dissipation. The electric vehicle power battery box comprises a battery box body, wherein multiple side-by-side grids used for placing single batteries are arranged in the battery box body; the grids and the single batteries form power battery modules; the grids are machined and shaped by thermal conducting aluminum sheets; preferably, the power battery modules are mounted in two layers in the battery box; the lower layer power battery module is mounted on the bottom plate of the battery box; the bottom surface of the upper layer power battery module and a thermal conducting apparatus are sealed; and a thermal conducting channel between the bottom surfaces of the power battery modules and the battery box is established through the thermal conducting apparatus. According to the electric vehicle power battery box provided by the invention, the single batteries are placed in the side-by-side grids; the thermal environments of each single battery are same; and therefore, the temperature differences of the single batteries in the battery box is reduced, and high thermal dissipation efficiency is achieved.

Description

technical field [0001] The invention relates to a power battery box, in particular to a high-efficiency heat dissipation power battery box for an electric vehicle. Background technique [0002] One of the characteristics of electric vehicles is the use of a large number of power batteries as electrical energy storage devices. Power batteries will generate a certain amount of heat during charging and discharging. Under normal operating conditions (0.5~1C), the heat production rate of a single battery It can reach 10W, and under the condition of peak current (1.0~3.0C), the heat generation rate of a single battery can reach more than 40W. Batteries have a normal operating range, generally between -20°C and 60°C. If the battery temperature is too high, its performance will decline, and even safety accidents such as liquid leakage, combustion and explosion will occur. Because the location and environment of the battery cells are not exactly the same, the heat generation and he...

AI Technical Summary

Problems solved by technology

If the battery temperature is too high, its performance will decline, and there may even be safety accidents such as liquid leakage, combustion and explosion.

Since the location and environment of the battery cells are not exactly the same, the heat generation and heat dissipation of each battery cell are different. The long-term heat accumulation will cause the temperature difference between the cells to be too large, which will affect the performance and life of the battery. have a serious impact

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