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Lithium ion battery welding tab structure and welding method thereof

A lithium-ion battery and tab technology, used in secondary batteries, structural parts, welding equipment, etc., can solve the problems of low volumetric energy density current-carrying capacity, large battery internal resistance, etc., to improve current-carrying capacity and reduce welding. Occupied space, the effect of increasing the weldable area

Inactive Publication Date: 2020-01-07
山东零壹肆先进材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a lithium-ion battery welding tab structure and its welding method to solve the problems of low volume energy density, low current-carrying capacity and large internal resistance of the battery in the existing metal strip welding method

Method used

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  • Lithium ion battery welding tab structure and welding method thereof
  • Lithium ion battery welding tab structure and welding method thereof
  • Lithium ion battery welding tab structure and welding method thereof

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] The object of the present invention is to provide a lithium-ion battery welding tab structure and a welding method thereof, which can improve the current carrying capacity of the battery and reduce contact resistance.

[0033] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific em...

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Abstract

The invention discloses a lithium ion battery welding tab structure and a welding method thereof. The lithium ion battery welding tab structure comprises a battery cell, a metal deposition layer and ametal belt; the battery cell comprises a current collector uncoated area; the battery cell comprises two positive pole sheets, a negative sheet and diaphragms; the positive pole sheet, the diaphragm,the negative pole plate, the diaphragm and the positive pole sheet are arranged sequentially in a staggered manner; the top of a current collector coated area is coated with the metal deposition layer in a spraying mode; and the metal belt is welded to the metal deposition layer. With the lithium ion battery welding tab structure and the welding method thereof of the invention adopted, the current-carrying capacity of a battery can be improved, contact resistance is reduced, and the effective size of the battery cell is increased.

Description

technical field [0001] The invention relates to the field of lithium ion battery metal strip welding, in particular to a lithium ion battery welding tab structure and a welding method thereof. Background technique [0002] Lithium-ion batteries are mainly composed of a positive electrode, a negative electrode, a separator, an electrolyte, and a case. The positive electrode and the negative electrode are stacked together by winding or stacking multi-layer film sheets, and a polymer material separator is used to separate them. Open, to avoid short circuit, the electrolyte is filled inside the pole piece and diaphragm, providing ion transmission channels. The casing seals the positive and negative electrodes, diaphragm and electrolyte in a moisture-insulated environment. In order to charge and discharge the external connection of the battery, it is necessary to lead the positive and negative electrodes out of the shell respectively. Usually, the metal strip of the pole piece i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M2/26H01M10/0585B23K31/02
CPCB23K31/02H01M10/0525H01M10/0585H01M50/54Y02E60/10Y02P70/50
Inventor 何金鑫
Owner 山东零壹肆先进材料有限公司
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