Heat management device for lithium battery pack

Abstract

A heat management device for a lithium battery pack is disclosed, the device includes a plurality of longitudinally spaced cooling plates and a circulating cooling sump disposed above the cooling plates, Between two adjacent cool plates, A liquid accumulation tank for circulate cooling is connected with that cooling plate through a connecting piece, the top surface of the cooling plate is providedwith a battery mounting groove, the cooling plate is of a hollow structure, The hollow cavities of the cooling plates are communicated with each other to form cooling passages for cooling liquid circulation, and the inlets and outlets of the cooling passages are communicated with circulating cooling accumulator tanks respectively. The circulating cooling accumulator tanks are provided with cooling devices, and the circulating cooling accumulator tanks are provided with unpowered drainage devices for driving the circulating cooling liquid. The lithium battery pack heat management device of theinvention has the advantages of compact structure, space saving, direct contact between the battery and the air, favorable rapid heat dissipation, circulating cooling of the coolant through a non-power drainage device, very energy saving, large contact area between the battery and the cooling plate, and good liquid cooling effect.

Description

technical field [0001] The invention relates to the field of electric vehicle batteries, in particular to a heat management device for a lithium battery pack. Background technique [0002] With the increasingly serious environmental pollution, the country's strong support for new energy and the maturity of key technologies for power batteries, electric vehicles are becoming more and more popular, and the scope of use is gradually increasing. During the use of electric vehicles, the battery pack is prone to overheating and excessive temperature differences, which will have a great impact on the life and performance of the battery pack. [0003] Existing battery packs are usually placed in a closed battery box, where heat tends to accumulate, resulting in overheating. The battery cooling device is usually equipped with a liquid cooling system to dissipate heat from the battery pack, but the traditional liquid cooling system circulates the coolant at a slow rate , The cooling ...

AI Technical Summary

Problems solved by technology

During the use of electric vehicles, the battery pack is prone to overheating and excessive temperature differences, which will have a great impact on the life and performance of the battery pack.

[0003] Existing battery packs are usually placed in a closed battery box, where heat tends to accumulate, resulting in overheating. The battery cooling device is usually equipped with a liquid cooling system to dissipate heat from the battery pack, but the traditional liquid cooling system circulates the coolant at a slow rate , the cooling efficiency is low, and the liquid cooling system usually uses the cooling liquid pipe to wrap the battery to dissipate heat. The contact area between the cooling liquid pipe and the battery is small, which affects the liquid cooling effect, and the structure is complex, which cannot meet the compact requirements of the battery pack.

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