A lithium battery cooling device for new energy vehicle batteries

Abstract

The invention discloses a lithium battery cooling device for a new energy vehicle battery, comprising a flow battery cell which can be used as a cooling liquid cooling plate after transformation, a lithium battery subjected to liquid cooling and heat dissipation, and a flow battery cell for cooling the liquid flow battery cell. The connecting piece that connects the various parts of the body together; the flow battery cell is arranged between the lithium batteries in a clamping manner; the two lithium batteries and a clamped flow battery cell together constitute a minimum part of the lithium battery heat dissipation device. The heat dissipation unit; the flow battery unit includes a battery diaphragm in the middle, positive / negative flow field plates on the two most sides, positive / negative electrodes, and positive / negative electrode frames. The invention provides a lithium battery cooling device for a new energy vehicle battery, which adopts a flow battery cell structure with a large flow field area, a small overall thickness and a simple structure, and is applied to the lithium battery cooling device to realize heat dissipation. The device itself has the function of storing electricity, and at the same time, the volume and thickness of the device can be greatly reduced, and the heat dissipation effect can be 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 for new energy vehicle batteries. Background technique [0002] In the thermal management technology of lithium-ion power batteries for new energy vehicles, since the 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 thermal management of the power battery 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 transported to the heat exchanger by the pump for cooling, and the cooled fluid (cooling liquid) flows through the battery again. [0003] Because the square lithium-ion battery has a regular shape and a flat surface, the battery can be cooled by arranging a cooling liquid cold plate between adjacent si...

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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