Lithium ion battery, and assembling method thereof

Abstract

The invention discloses a lithium ion battery, and an assembling method thereof, and belongs to the field of lithium battery. The assembling method is capable of solving a problem in the prior art that battery cost is increased because of electrical core swelling. The lithium ion battery comprises a support, and a battery casing used for accommodating the support; the support comprises an accommodating cavity and an upper cover; a plurality of sheet-shaped electrical cores are vertically arranged in the accommodating cavity, and are piled successively in the transverse direction; the side wallof the accommodating cavity is pressed against by a pressing belt, and the pressing direction is consist to that of the electrical core piling direction. The above structure is beneficial for realizing of rapid assembling, and reducing of manufacturing cost. The assembling method comprises following steps: 1, the electrical cores and a combination plate are arranged in the accommodating cavity; 2, the pressing belt is assembled; 3, the upper cover is assembled; 4, the support is arranged in the casing main body; and 5, the cover body is arranged in the casing main body. The assembling methodis capable of reducing influences on rapid loss of electrical core capacity caused by current density uneven distribution, and prolonging the storage life of lithium ion batteries at high temperatureconditions.

Description

technical field [0001] The invention belongs to the field of lithium batteries, in particular to a lithium ion battery and an assembly method thereof. Background technique [0002] The existing lithium-ion battery is equipped with a cell group composed of multiple cells. The cell group is vertically assembled on the bracket. The multiple cells will generate more heat during the charging and discharging process, and the heat generated is easy to accumulate. Moreover, the restrictive effect of the bracket on the battery cell is limited, and the battery cell is prone to volume expansion and swelling. After the battery cell bulges, it will lead to poor contact of the pole piece of the battery cell, which will accelerate the loss of the battery capacity, which not only affects the battery life. The storage life will also destroy the stability of the lithium-ion battery structure and affect the use of lithium-ion batteries. However, when improving the structure or materials of the...

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Problems solved by technology

[0003] Aiming at solving the problem of increasing battery cost caused by cell swelling in the prior art, the present invention provides a lithium-ion battery, which can save costs by improving the assembly structure of the cell to improve the cell swelling, and provides an assembly method thereof, This assembly method has the advantages of saving time and labor, and also has the effect of prolonging the storage life of lithium-ion batteries under high temperature conditions

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