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Cap for cylindrical lithium ion battery and manufacturing method thereof

A lithium-ion battery and a manufacturing method technology, which are applied in the directions of battery cover/end cover, secondary battery, battery pack components, etc., can solve the problem of high height restricting the internal space of the battery, and reduce the internal resistance of the cap and reduce the cap Cover height and excellent discharge performance

Pending Publication Date: 2018-09-21
SHENZHEN BAK POWER BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cap for a cylindrical lithium-ion battery and a manufacturing method thereof, to solve the technical problem that the height of the cap for the existing cylindrical lithium-ion battery is relatively large and restricts the internal space of the battery

Method used

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  • Cap for cylindrical lithium ion battery and manufacturing method thereof
  • Cap for cylindrical lithium ion battery and manufacturing method thereof
  • Cap for cylindrical lithium ion battery and manufacturing method thereof

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Embodiment Construction

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations...

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PUM

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Abstract

The invention belongs to the technical field of cylindrical lithium ion batteries, and particularly relates to a cap for a cylindrical lithium ion battery and a manufacturing method thereof. A rupturedisk is directly connected to a top cap to remove a ring piece in an existing cap, the height of the cap is effectively reduced, the internal space of the battery is increased, cost is reduced, the internal resistance of the cap is reduced, and convenience is provided for designing the battery with better capacity and discharge performance. The problem that the contact resistance of a plurality of ring piece structures in the existing cap is large and unstable, which is disadvantageous for use of the cap is solved.

Description

technical field [0001] The invention belongs to the technical field of cylindrical lithium ion batteries, and more specifically relates to a cap for cylindrical lithium ion batteries and a manufacturing method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density, long cycle life, low self-discharge rate, and small cell volume. At the same time, there are safety problems, such as high temperature, short circuit, overcharge, overdischarge and other abnormal conditions. Lithium-ion batteries are prone to dangers such as overheating, fire and even explosion. The function of the cylindrical lithium-ion battery cap is to ensure that the lithium-ion battery can be prevented from continuing to work in time under abnormal conditions, and potential dangers can be eliminated early. Its working principle is as follows: under abnormal conditions such as high temperature, short circuit, overcharge or overdischarge, ...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/12H01M10/0525H01M50/147H01M50/342
CPCH01M10/0525H01M50/147H01M50/342Y02E60/10
Inventor 熊杏萍李艳斌胡江波岳绍宇刘宣业
Owner SHENZHEN BAK POWER BATTERY CO LTD