Battery cell, assembling method thereof and connecting sheet

A battery cell and connecting piece technology, which is applied to battery pack components, secondary batteries, circuits, etc., can solve the problems of high temperature at the top of the winding core and affect the safety of the battery cell, so as to reduce the physical internal resistance and improve safety , the effect of reducing internal resistance

Pending Publication Date: 2020-09-15
湖南领湃科技股份有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in this application is that there is a stack of tabs and connecting pieces at the top of the existing battery, resulting in a relatively high temperature at the top of the winding core, which affects the safety of the battery core

Method used

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  • Battery cell, assembling method thereof and connecting sheet
  • Battery cell, assembling method thereof and connecting sheet
  • Battery cell, assembling method thereof and connecting sheet

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Embodiment Construction

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom" etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the application and simplify the description, but not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and op...

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Abstract

The invention provides a battery cell, an assembling method thereof and a connecting sheet. The battery cell comprises: a shell; a roll core arranged in the shell, and a tab being arranged on the rollcore; a cover plate assembly comprising a cover plate and a pole column arranged on the cover plate, and the pole column being provided with a pole column sinking table and a pole column hole penetrating through the pole column sinking table; a connecting piece comprising an ultrasonic welding part of a two-piece type opening and closing structure and a laser welding part of a two-piece type opening and closing structure, and the ultrasonic welding part being connected with the laser welding part. The ultrasonic welding part of the connecting sheet wraps the tab on the roll core, the connecting sheet and the tab wrapped by the connecting sheet penetrate into the cover plate, and the laser welding part of the connecting sheet penetrates through the pole hole and is welded with the pole sinking table. The physical internal resistance of the battery can be reduced, so that the total internal resistance of the battery is reduced, battery heating is reduced, and the safety and the servicelife of the battery are better improved.

Description

technical field [0001] The present application relates to the field of lithium-ion battery equipment, in particular to a battery cell, an assembly method thereof, and a connecting piece applied to the battery cell. Background technique [0002] In recent years, with the support of national policies and the continuous innovation of technology, the penetration rate of electric vehicles has continued to increase, and there have been more and more problems of fire and spontaneous combustion of electric vehicles, which has brought great harm to the safety of people's property and life. At the same time, it also affects consumers' choice of electric vehicles. In the design of the power battery system, high requirements are placed on the thermal management and control capabilities of the system. The design scheme for the lithium-ion battery cell is to control the heat generation of the battery itself. As we all know, the heat generation of the power battery is mainly due to its It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M2/04H01M2/26
CPCH01M10/0587Y02E60/10Y02P70/50
Inventor 孙威韩好李根雨孙俊吉曹启飞金虎权周滢杰王春阳刘盼盼
Owner 湖南领湃科技股份有限公司
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