CN201708217U - 一种锂离子电池卷芯 - Google Patents

一种锂离子电池卷芯 Download PDF

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Publication number
CN201708217U
CN201708217U CN2010201218006U CN201020121800U CN201708217U CN 201708217 U CN201708217 U CN 201708217U CN 2010201218006 U CN2010201218006 U CN 2010201218006U CN 201020121800 U CN201020121800 U CN 201020121800U CN 201708217 U CN201708217 U CN 201708217U
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Prior art keywords
lithium ion
ion battery
negative plate
positive
lug
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许稳功
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Dongguan Geli Liangyuan Battery Technology Co.,Ltd.
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DONGGUAN LIANGYUAN BATTERY TECHNOLOGY Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

本实用新型公开了一种锂离子电池卷芯，包括正极片、负极片、正极耳、负极耳及隔膜，隔膜位于正、负极片间，正极片的一端设有正极耳，负极片的另一端设有负极耳，以正极耳或负极耳所在端为轴将极片卷绕后，即形成卷芯结构，此种方式卷绕成型的卷芯，正极耳、负极耳之间距相对较大，在电池发生意外形变时内部卷芯正、负极耳亦不容易相互接触造成短路，因而极大的提高了锂离子电池的安全性。

Description

一种锂离子电池卷芯
技术领域
本实用新型涉及锂离子电池领域，具体是指一种锂离子电池卷芯。
背景技术
锂离子电池是指以锂离子嵌入化合物为正极材料电池的总称，其具有能量密度大，平均输出电压高，自放电小，没有记忆效应，循环性能优越、可快速充放电的特点，而且锂离子电池输出功率大，使用寿命长，没有环境污染，被称为绿色电池。因而锂离子电池已经广泛应用于手机、笔记本电脑等领域，然而，即使锂离子电池具有相对较高的安全性，在电池因意外碰撞或挤压发生形变时，电池内部正、负极也易发生短路，从而引发危险。
实用新型内容
本实用新型根据锂离子电池的内部结构特点，提供了一种更为安全的锂离子电池卷芯的卷绕结构，此种结构的电池卷芯，由于将正、负极耳间距最大化，从而极大的降低了电池形变导致内部短路的危险性。
为实现上述目的，本实用新型采用如下的技术方案：
包括正极片、负极片、隔膜、正极耳、负极耳，隔膜设置于正、负极片之间，正极片的一端设有正极耳，负极片在正极耳的另一端设有负极耳，以正极耳或负极耳所在端为轴卷绕成扁平状的锂离子电池卷芯。
以该方式卷绕成型的电池卷芯，正、负极耳分别在卷芯的内部和外侧，因此增加了正、负极耳间距，在电池受到挤压或碰撞时互相之间不易发生接触，且加工工艺简单。
附图说明
图1是本实用新型电池卷芯正、负极片及隔膜叠放示意图；
图2是本实用新型电池卷芯卷绕成型示意图；
具体实施方式
下面结合附图对本实用新型内容做进一步详细描述：
如图1所示，以正极片1、隔膜3、负极片2依次叠放，隔膜3位于正极片1、负极片2之间，在正极片1的一端设有正极耳4，负极片2在正极耳4的两一端设有负极耳5。
如图2所示，以负极耳5所在端为轴，将叠放的正极片1、负极片2及隔膜3卷绕成扁平状，形成锂离子电池卷芯。
同样的，当以正极耳4所在端为轴卷绕正、负极片及隔膜3时，所成型的锂离子电池卷芯亦具有同等功能的卷芯卷绕结构。
以上所述仅为本实用新型的较佳实施方式，并非对本实用新型保护范围的限定，本领域的技术人员在此基础上所做的等效变换和变形都属于本实用新型的保护范畴。

Claims (1)

1.一种锂离子电池卷芯，包括依次叠加的正极片(1)、隔膜(2)、负极片(3)、正极耳(4)、负极耳(5)，隔膜(2)位于正、负极片之间，其特征在于：正极耳(4)设置在正极片(1)的一端；负极耳(5)设置在负极片(3)上，且位于正极耳(4)另一端。
CN2010201218006U 2010-02-22 2010-02-22 一种锂离子电池卷芯 Expired - Fee Related CN201708217U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102122728A (zh) * 2011-01-28 2011-07-13 福建南平南孚电池有限公司 一种用于圆柱形锂-二硫化铁电池的电芯卷绕方法
CN111313102A (zh) * 2020-03-03 2020-06-19 宁德新能源科技有限公司 电芯及包含其的电化学装置和电子装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102122728A (zh) * 2011-01-28 2011-07-13 福建南平南孚电池有限公司 一种用于圆柱形锂-二硫化铁电池的电芯卷绕方法
CN111313102A (zh) * 2020-03-03 2020-06-19 宁德新能源科技有限公司 电芯及包含其的电化学装置和电子装置

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Owner name: DONGGUAN GELI LIANGYUAN BATTERY TECHNOLOGY CO., LT

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Address after: 523000 No. 2, Lao Lao Road, Tangxia Town, Guangdong, Dongguan

Patentee after: Dongguan Geli Liangyuan Battery Technology Co.,Ltd.

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Patentee before: Dongguan Liangyuan Battery Technology Co., Ltd.

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Granted publication date: 20110112

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