Lithium battery pack

Abstract

The invention discloses a lithium battery pack for solving the problem of temperature rise of the existing battery pack. The lithium battery pack comprises battery cells, uniform-temperature components and a shell, wherein the battery cells and the uniform-temperature components are overlaid at intervals, each uniform-temperature component comprises a left shell, a right shell, a liquid-guiding plate, a liquid-inlet pipe and a liquid-outlet pipe; the left shell and the right shell are symmetrical structures, an internal chamber of the liquid-guiding plate is a cooling liquid channel, an edge of the liquid-guiding plate is embedded in a joint between the left shell and the right shell, polyethylene glue grooves are arranged around the liquid-guiding plate to form a glue joint, two sides of the liquid-guiding plate respectively form uniform-temperature fields with the left shell and the right shell; a central hole and a spiral liquid-distributing slot are respectively formed on two side surfaces of the liquid-guiding plate; and the shell and the liquid-guiding plate are connected with one liquid-inlet pipe through four liquid-outlet pipes so as to form a cooling medium flowing channel. The lithium battery pack can control the flowing speed of cooling medium in the uniform-temperature components to achieve the aim of controlling internal temperature of the battery cells.

Description

technical field [0001] The invention relates to the technical field of new energy lithium battery packs, specifically a lithium battery pack with better temperature control effect. Background technique [0002] Lithium battery packs are the core components of electric vehicles, and their performance directly affects the performance of electric vehicles. Lithium battery packs are generally large in size and occupy the position of the chassis of the vehicle, and their heat dissipation effect is poor. [0003] Nowadays, batteries are generally cooled by natural cooling, air cooling or water cooling. Since lithium battery packs are generally lithium batteries, taking lithium batteries as an example, the best internal charge and discharge temperature cannot be higher than 140°C, and the external temperature cannot If the temperature is higher than 80°C, the service life and charging and discharging effect of the battery will be reduced. [0004] Among them, the three heat dissip...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the present invention provides a lithium battery pack, which is used for temperature control of the lithium battery pack, especially to cool down its main surface, so as to solve the problems of lifespan reduction and explosion caused by the heating of the lithium battery pack.

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