Lithium battery heat dissipation device for new energy automobile battery

Abstract

The invention discloses a lithium battery heat dissipation device for a new energy automobile battery. The lithium battery heat dissipation device comprises a flow battery monomer which can be used asa heat dissipation liquid cooling plate after transformation, a lithium battery subjected to liquid cooling heat dissipation, and a connecting piece for connecting all parts of the flow battery monomer together; the flow battery monomers are arranged between the lithium batteries in a clamping manner; the two lithium batteries and the clamped flow battery monomer jointly form a minimum heat dissipation unit of the lithium battery heat dissipation device; and each flow battery monomer comprises a battery diaphragm located in the middle, positive/negative flow field plates located on the two sides, positive/negative electrodes and positive/negative electrode frames. According to the lithium battery heat dissipation device for the new energy automobile battery provided by the invention, theflow battery monomer structure which is large in flow field area, small in overall thickness and simple in structure is applied to the lithium battery heat dissipation device, so that the heat dissipation device has an electricity storage function, meanwhile, the size and the thickness of the device can be greatly reduced, and the heat dissipation effect is improved.

Description

technical field [0001] The invention belongs to the technical field of heat dissipation devices, and in particular relates to a lithium battery heat dissipation device used for new energy vehicle batteries. Background technique [0002] In the heat management technology of lithium-ion power batteries of new energy vehicles, since air-cooled heat dissipation often cannot meet the expected heat dissipation effect, a liquid-cooled battery heat dissipation system using liquid as the medium for heat management of power batteries has been developed. The heat dissipation method is that the liquid medium flows through the battery and takes away the heat of the battery, and is pumped to the heat exchanger for cooling, and the cooled fluid (coolant) flows through the battery again. [0003] Due to the regular shape and flat surface of the square lithium-ion battery, the battery can be cooled by arranging a heat dissipation liquid cold plate between adjacent single cells or on the side...

AI Technical Summary

Problems solved by technology

For this active liquid-cooled battery heat dissipation system, in order to achieve a good heat dissipation effect, a higher coolant flow rate and a lower coolant inlet temperature are required, which will inevitably greatly increase the energy consumption of the pump and refrigeration system

For electric vehicles, especially pure electric vehicles, the capacity of the battery system is limited and precious, so the liquid cooling system will consume a lot of energy in the battery system when it is running; in addition, the cooling system is a part of the battery system. Arranging liquid cold plates between them increases the volume and weight of the entire battery system, thereby reducing the overall energy density of the battery system

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