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Secondary battery

A secondary battery, electrode lead technology, applied in secondary battery manufacturing, battery pack parts, circuits, etc., can solve the problems of wrinkles or damage of the sealing part, affecting the sealing performance of the packaging bag, etc., to improve the sealing performance and reduce the puncture The risk of breakage and the effect of improving safety performance

Pending Publication Date: 2019-08-30
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a height difference and steps in the area of ​​the sealing part close to the edge of the insulating part. During hot pressing, the sealing part is prone to wrinkles or damage at the steps, which affects the sealing performance of the packaging bag

Method used

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Embodiment Construction

[0062] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 application, and are not intended to limit the present application.

[0063] In the description of this application, unless otherwise clearly specified and limited, the terms "first", "second", "third" and "fourth" are only used for the purpose of description, and should not be understood as indicating or implying Relative importance; the term "multiple" refers to more than two (including two); unless otherwise specified or explained, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection or a Disassembled connection, or integral connection, or electrical connection, or signal connect...

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Abstract

The invention provides a secondary battery, which comprises an electrode assembly, a packaging bag, an electrode lead and an insulating piece, wherein the electrode assembly is accommodated in the packaging bag, the edge of the packaging bag is provided with a sealing part, and the electrode lead is connected to the electrode assembly and passes through the sealing part. The sealing part includesa main body area, a first step area and a first transition area, wherein the first step area is located on both sides of the electrode lead along the thickness direction, the main body area and the first transition area are located at the same side of the first step area along the width direction, and the first transition area is connected between the first step area and the main body area. The insulating piece separates the sealing part and the electrode lead. The insulating piece includes a first portion, and the first portion is located between the electrode lead and the first step area. The sum of the thickness of the first step area, the first portion and the electrode lead is H1, and the thickness of the main body area is H2, wherein H1>H2. The minimum distance between the electrodelead and the outer surface of the first transition area is D1, and the minimum distance between the electrode lead and the outer surface of the first step area is D2, wherein D1>=D2.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a secondary battery. Background technique [0002] With the rapid development of portable electronic devices, the requirements for battery energy density are getting higher and higher. In secondary batteries, packaging bags made of aluminum-plastic film or steel-plastic film can be used instead of metal casings to reduce battery weight and increase energy density. [0003] The electrode assembly of the secondary battery is accommodated in the packaging bag, and the edges of the packaging bag can be sealed and connected by heat and pressure to form a sealing part. Of course, in order to realize the charging and discharging of the electrode assembly, the secondary battery also includes an electrode lead and an insulator. The electrode lead is connected to the electrode assembly and extends to the outside of the packaging bag. separated. However, there is a height difference and a step i...

Claims

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Application Information

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IPC IPC(8): H01M10/04H01M2/06
CPCH01M10/04Y02E60/10Y02P70/50H01M50/105H01M50/129H01M50/178H01M50/119H01M50/121B29C65/02B29C66/1122B29C66/433B29C66/83221B29L2031/3468B29C66/81431B29C66/81425B29C66/322B29C66/7352B29C66/71B29C66/72321B29K2705/02B29K2705/12B29K2077/00B29K2067/003B29K2023/12H01M50/533H01M50/184
Inventor 谢绵钰伍永彬
Owner CONTEMPORARY AMPEREX TECH CO
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