Reverse-flow cooling system for power battery pack and power battery pack

Abstract

The embodiment of the invention relates to the technical field of batteries, and in particular relates to a reverse-flow cooling system for a power battery pack and the power battery pack. The coolingsystem comprises a plurality of cooling units which are arranged in parallel; two sets of cooling channels which are arranged in a staggered mode are arranged in each cooling unit, and the flowing directions of cooling media in the two sets of cooling channels which are arranged in the staggered mode are opposite. According to the invention, two sets of staggered cooling channels are arranged ineach cooling unit; the flowing directions of the cooling media in each set of cooling channels are opposite to form reverse flow, so that the cooling effects of the two ends of each cooling unit are the same, and the defect that the temperature of a battery is gradually increased due to gradual reduction of the cooling capacity in the flowing direction during one-way cooling is overcome; the powerbattery is cooled through the plurality of cooling units; and the plurality of cooling units are arranged in parallel, so that the overall arrangement has the characteristics of compactness and modularization.

Description

technical field [0001] The embodiments of the present application relate to the technical field of batteries, and in particular, relate to a counterflow cooling system for a power battery pack and the power battery pack. Background technique [0002] New energy vehicles are an inevitable trend in the future development of automobiles. Power batteries, as their power source and key technology, have become the research hotspots of many research and development units. The development of power batteries with light weight, small size and high specific energy has become an important trend, but Accompanying it is the higher heat release intensity in the process of battery work and charging and discharging, ensuring that the battery works in a reasonable temperature range, which has become one of the bottlenecks restricting the development of power battery technology. During the starting and accelerating process of the car, the current changes greatly and the heat release is uneven;...

AI Technical Summary

Problems solved by technology

Compared with air cooling, liquid cooling has a better cooling and cooling effect, which can effectively reduce the temperature of the battery. However, the current practical application of liquid cooling technology generally has the problems of low uniformity of heat transfer and poor controllability. Therefore, it often occurs Battery overheating, shortened battery life, and even accidents such as battery burning

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