A battery pack based on a cylindrical battery pack unit

Abstract

The invention relates to the technical field of automotive power battery packs, and provides a battery pack based on a tubular battery unit. The battery pack comprises a positive electrode terminal, anegative electrode terminal and a plurality of battery packs, the battery packs are stacked in ranks, the same columns of the battery packs are synchronously connected in parallel, and adjacent columns of the battery packs are connected in series in order. Each battery pack concretely comprises a tubular column body and a plurality of battery cells, the battery cells are connected in series in order, and the tubular column bodies sleeve the outer portions of the battery cells to fix the serially connected battery cells. Besides, the parallel connection of the same columns of the battery packsis achieved through first end face fixing parts, the serial connection of the adjacent columns of the battery packs is achieved and the parallel connection of the same columns of the battery packs isachieved through second end face fixing parts so as to have a fixing effect on the battery packs. The battery pack based on the tubular battery unit is high in structural strength, good in rigidity,obvious in heat dissipation effect and good in safety performance, can be assembled to battery packs with different voltage grades and power as required, and is high in versatility.

Description

technical field [0001] The present invention relates to the technical field of automotive power battery packs, and more particularly, to a battery pack based on tubular battery pack units. Background technique [0002] With the deterioration of the environment and the increasing shortage of energy resources, new energy vehicles, especially pure electric vehicles, are increasingly valued and favored by people. The power battery pack is one of the three electric systems of electric vehicles and the energy core of electric vehicles. At present, many existing power battery packs adopt the design mode of low voltage and high current, which is not very versatile. Moreover, in order to improve the energy density of the power battery pack, many battery packs reduce the material as much as possible, which affects the stability of the battery pack structure, leads to a decrease in the insulation performance of the power battery pack, and is prone to safety accidents under high temper...

AI Technical Summary

Problems solved by technology

At present, many existing power battery packs adopt the design mode of low voltage and high current, which is not very versatile.

Moreover, in order to improve the energy density of the power battery pack, many battery packs reduce the material as much as possible, which affects the stability of the battery pack structure, leads to a decrease in the insulation performance of the power battery pack, and is prone to safety accidents under high temperature and collision conditions

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