Parallel air-cooling heat dissipation structure for stepped battery module

Abstract

The invention provides a parallel air-cooling heat dissipation structure for a stepped battery module. The parallel air-cooling heat dissipation structure comprises a heat dissipation box body and a stepped frame; the stepped frame is arranged in the heat dissipation box body and is used for dividing the heat dissipation box body into an air incoming region, an air outgoing region and a battery pack mounting region; the battery pack mounting region is provided with a plurality of battery packs mounted in the stepped frame; a left frame comprises an upper top plate, a lower bottom plate, partition plates and side plates; the upper top plate and the lower bottom plate are both stepped; steps between the upper top plate and the lower bottom plate are divided into a plurality of battery slotsthrough the plurality of partition plates; the side plates are arranged between adjacent partition plates; and the left frame and a right frame are both installed in the heat dissipation box body in asliding mode. With the parallel air-cooling heat dissipation structure for the stepped battery module of the invention adopted, batteries can work in an optimal temperature range; the temperature consistency of the batteries during working is ensured; the size of the box body is greatly reduced; and the mass energy density and volume energy density of a system are improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a parallel air-cooled heat dissipation structure of ladder-shaped battery modules. Background technique [0002] The optimal operating temperature of lithium-ion batteries is 25°C to 40°C. When the temperature is too low, the viscosity of the electrolyte inside the battery increases, resulting in a decrease in the movement rate of conductive ions, which leads to a significant decline in many battery performance characteristics such as charge and discharge capacity and discharge voltage platform. At the same time, too low temperature will also promote the formation of lithium dendrites at the negative electrode of the battery, causing an internal short circuit of the battery and affecting the service life of the battery. When the temperature is too high, the internal components of the battery will be decomposed step by step, and a series of exothermic reactions will accumulate ...

AI Technical Summary

Problems solved by technology

When the temperature is too low, the viscosity of the electrolyte inside the battery increases, resulting in a decrease in the movement rate of conductive ions, which leads to a significant decrease in the performance of many battery characteristics such as charge and discharge capacity, discharge voltage platform, etc.

At the same time, too low temperature will also promote the formation of lithium dendrites on the negative electrode of the battery, causing an internal short circuit in the battery and affecting the service life of the battery.

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