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Lithium ion power battery

A power battery and lithium-ion technology, which is applied in the field of lithium-ion power batteries, can solve the problems that the surface heat dissipation of the battery core cannot be cooled internally, reduce production efficiency and pass rate, and battery safety hazards, etc., so as to improve production efficiency and battery safety. Improve production efficiency and pass rate, improve the effect of production operability

Active Publication Date: 2012-12-05
YINLONG ENERGY CO LTD
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AI Technical Summary

Problems solved by technology

The lithium-ion power battery with the existing structure has the following disadvantages: during the winding process of the pole piece, the alignment accuracy of the tabs of the pole piece is not high, which reduces the production efficiency and qualification rate; at the same time, the battery only has surface heat dissipation but not internal heat dissipation , which poses a certain safety hazard to the battery; it takes a long time for the electrolyte to soak the pole pieces of each layer, which reduces the production efficiency; The battery core may expand and the pole piece may break, which also poses a certain safety hazard

Method used

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Examples

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Embodiment

[0025] Specific embodiments will be described below in conjunction with the accompanying drawings.

[0026] please see figure 1 , The lithium-ion power battery includes two aluminum rings 6. The pole piece assembly is cut into three parts with different tab spacings by a laser cutting machine, and then rolled into three core barrels with different diameters for nesting placement. The two aluminum rings 6 placed between adjacent core barrels.

[0027] The upper end of the pole piece assembly includes an upper electrode part, an upper gasket 4, an aluminum sheet 3, an upper cover plate 2 and a liquid injection port cover 1 in sequence; the upper end of the pole piece assembly is connected with the upper electrode part, and the upper electrode part includes a central Two poles 5 arranged in a symmetrical manner; the lower end of the pole piece assembly includes a lower electrode part, a lower gasket 7, a lower aluminum sheet and a lower cover in turn; the lower end of the pole p...

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Abstract

The invention provides a lithium ion power battery, which can improve the tab location accuracy while winding an electrode plate, improve the production efficiency and the yield and further improve the cell security. The lithium ion power battery comprises a case with a cylindrical surface, a cell in the inner cavity of the case, an upper cover plate and a lower cover plate on both ends of the cell, and an upper electrode part and a lower electrode part on both ends of the cell. The cell includes an electrode plate assembly formed by arranging and connecting a plurality of positive electrode plates, negative electrode plates and an isolating membrane between adjacent positive electrode plate and negative electrode plate in a winding manner; the cell also includes one or more aluminum rings with a cylindrical structure, wherein the aluminum rings are arranged in the inner cavity of the case to divide the electrode plate assembly into a plurality of sections; and a portion of the electrode plate assembly is located inside the aluminum ring, and the other portion of the electrode plate assembly is sheathed outside the aluminum ring. An aluminum plate for dissipating heat is arranged on both ends of the cell, and is connected with the end part of the aluminum ring.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion power batteries, and in particular relates to an internal structure of a lithium-ion power battery. Background technique [0002] In the existing lithium-ion power battery manufacturing process, the battery core is usually wound in a one-time manner. The lithium-ion power battery with the existing structure has the following disadvantages: during the winding process of the pole piece, the alignment accuracy of the tabs of the pole piece is not high, which reduces the production efficiency and qualification rate; at the same time, the battery only has surface heat dissipation but not internal heat dissipation , which poses a certain safety hazard to the battery; it takes a long time for the electrolyte to soak the pole pieces of each layer, which reduces the production efficiency; The battery core may expand and the pole pieces may break, which also poses certain safety hazards. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/50H01M2/30H01M2/00H01M10/613H01M10/6554
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 王国文魏银仓张兵
Owner YINLONG ENERGY CO LTD
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