Lithium battery pack temperature equalization mechanism

Abstract

The invention discloses a lithium battery pack temperature equalization mechanism, which comprises a lithium battery pack comprising a plurality of single battery cells; coating parts; and a battery support detachably arranged at the upper end part and the lower end part of the lithium battery pack. Each coating part is arranged on the outer surface of the corresponding single battery, and the coating parts are in contact with the outer surfaces of the batteries; the coating part is made of a material with high heat conduction coefficient and large specific heat capacity; the plurality of coating parts are mutually combined to form an integrally formed structure. Thus, the temperature of the batteries of the lithium battery pack is balanced; the temperature difference between the batteriesof the single lithium battery pack under the working conditions of storage, charging and discharging is reduced, the service life of the battery pack is prolonged, and the electrical performance andsafety of the lithium battery pack are improved.

Description

technical field [0001] The invention relates to a lithium battery pack, in particular to a lithium battery pack temperature equalization mechanism. Background technique [0002] As a power unit, lithium-ion battery packs are widely used in short-distance travel tools such as electric children's manned toy cars, electric wheelchairs, and electric mopeds. [0003] Lithium battery packs that are commonly used as electric energy units in the market at present are simply assembled by grouping lithium ion batteries and directly assembling them into composite material housings such as ABS, so as to realize simple packaging of lithium ion battery packs. It does not adopt a thermal balance design for the device. The temperature difference between the single cells of the lithium-ion battery pack will increase under various working conditions, resulting in an increase in the internal resistance difference between the cells and the increase in the capacity difference between the cells. ...

AI Technical Summary

Problems solved by technology

It does not adopt a thermal balance design for the device. The temperature difference between the single cells of the lithium-ion battery pack will increase under various working conditions, resulting in an increase in the internal resistance difference between the cells and the increase in the capacity difference between the cells. Large, the voltage difference between the single cells increases, which affects the electrical performance of the lithium battery pack; there may even be a situation where the lithium battery pack is over-temperature protected and cut off due to heat accumulation at individual cells due to uneven heat dissipation of the lithium battery pack. Thermal runaway of body cells

Cause tool operation failure damage, and even personal injury

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