CN201032638Y - 安全锂离子电池 - Google Patents
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 12
- 239000004698 Polyethylene Substances 0.000 description 3
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- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- QEXMICRJPVUPSN-UHFFFAOYSA-N lithium manganese(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Li+] QEXMICRJPVUPSN-UHFFFAOYSA-N 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
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Abstract
本实用新型公开了一种安全锂离子电池，旨在解决防止由于电池壳的颈部在成型过程中所产生的金属颗粒所引起的短路问题。包括电池盖、正极、隔膜、负极、有机电解液、圆柱形电池壳以及电池壳上向内凹陷的颈部，沿所述电池壳的颈部内侧表面上固设有胶带。可以彻底解决电池壳的颈部在成型过程中所产生的金属颗粒所引起的短路问题，也可以彻底防止电池壳的颈部在成型过程中而造成损伤，而在以后的使用中所产生的金属颗粒所引起的短路问题。
Description
技术领域
本实用新型涉及锂离子电池，更具体地说，涉及一种可防止由于电池壳的颈部在成型过程中所产生的金属颗粒发生短路事故的安全锂离子电池。
背景技术
锂离子电池自上世纪九十年代问世以来，以其高能量密度、高工作电压、长循环寿命、电化学特性稳定、可快速充电、工作温度范围宽、荷电保持能力强、无污染、无记忆效应等优点而实现了快速的发展，并广泛地应用于社会生产、生活、科研等领域。为移动电话、笔记本电脑、数码像机、MP3的小型化做出了卓越的贡献，且必将会越来越多地应用于国防及空间探索领域。
锂离子电池主要由正极、隔膜、负极、有机电解液、电池壳所构成，正极材料通常采用氧化钴锂、氧化镍锂、氧化锰锂等；隔膜主要采用聚乙烯、聚丙烯等组成的单层或者多层的微多孔薄膜；负极材料主要有石墨化碳材料、无定形碳材料等；由于锂离子电池负极的电位与锂相近，比较活泼，在水溶液体系中不稳定，必须使用非水、非质子性有机溶剂最为锂离子的载体，有机电解液主要有碳酸乙烯酯、碳酸二甲酯、碳酸二乙酯、碳酸甲乙酯等组成的一元、二元、或者三元的混合溶剂。
锂离子电池应用极其广泛，它的安全性能自然就是锂离子电池的第一项考核指标。
为了确保锂离子电池的安全，先后出现了多种电池安全措施：
(1)隔膜135℃自动关断保护
采用国际先进的Celgard2300PE-PP-PE三层复合膜。在电池升温达到120℃的情况下，复合膜两侧的PE膜孔闭合，电池内阻增大，电池内部升温减缓，电池升温达到135℃时，PP膜孔闭合，电池内部断路，电池不再升温，确保电池安全可靠。
(2)向电液中加入添加剂
在电池过充，电池电压高于4.2v的条件下，电液添加剂与电液中其他物质聚合，电池内阻大副增加，电池内部形成大面积断路，电池不再升温。
(3)电池盖复合结构
电池盖采用刻痕防爆结构，电池升温时，电池内部活化过程中所产生的部分气体膨胀，电池内压加大，压力达到一定程度刻痕破裂、放气。
(4)各种环境滥用试验
进行各项滥用试验，如外部短路、过充、针刺、平板冲击、焚烧等，考察电池的安全性能。同时对电池进行温度冲击试验和振动、跌落、冲击等力学性能试验，考察电池在实际使用环境下的性能情况。
以上措施可以在很大程度上增强锂离子电池的安全性能，但不能彻底杜绝锂离子电池的安全问题，有一种圆柱形壳体的电池，其壳体的上部具有一向内凹入的颈部，在成型这一颈部结构时，成型过程中可能会产生一些金属小颗粒，或在成型过程中造成损伤，而在以后的使用中所产生的金属颗粒，刺破隔如果金属颗粒刺破锂离子电池的隔膜，则会引起电池短路，据报道，在给Sony公司造成了重大损失的Sony笔记本电池召回事件中，电池起火原因的主要就是由于电池中不慎掺杂的金属微粒刺破隔膜引发了短路。
实用新型内容
本实用新型的目的在于克服现有技术中的上述缺陷，提供一种可以防止电池壳的颈部在成型过程中所产生的金属颗粒所引起短路问题，且使用安全的锂离子电池。
为实现上述目的，本实用新型提供的技术方案如下：构造一种安全锂离子电池，包括呈圆柱形结构的电池壳体、电池盖、正极、隔膜、负极、有机电解液，圆柱形电池壳体的上部具有一向内凹入的环形颈部，在所述向内凹入的环形颈部的内侧壁表面上设有一环形胶带。
本实用新型的有益效果是：由于本实用新型在电池壳上部的颈部内侧壁表面设有胶带，所产生的金属颗粒可以附着在胶带上，而不会落入壳体内，可以彻底解决电池壳的颈部在成型过程中所产生的金属颗粒落入壳体内所引起的短路问题，也可以彻底防止电池壳的颈部在成型过程中而造成的损伤，而在以后的使用过程中所产生的金属颗粒所引起的短路问题。
附图说明
图1是本实用新型安全锂离子电池的壳体在成型的剖视图；
图2是图1所示安全锂离子电池壳体颈部成型后的剖视图；
图3是图2的俯视图。
具体实施方式
参照图1、图2、图3，提供一种圆柱形安全锂离子电池，在成型电池壳体前，可沿电池壳体2的颈部3的内侧壁表面固设一环状的胶带1，电池壳体的颈部3在成型过程中会发生塑性变形，可能会有少量的金属颗粒脱落，虽然还有一些金属颗粒虽未完全脱落，但已经受到损伤，在以后的使用当中极易脱落，如果这些已经脱落或者将要脱落的金属颗粒留在电池内部，就有可能刺破电池的隔膜，造成短路。而环状的胶带1的存在就会粘住在成型过程中产生的金属颗粒，也会粘住在使用过程中逐渐脱落的金属颗粒，从而彻底防止此类由于金属颗粒刺破隔膜而造成的短路问题。
胶带1的可宽度大于或等于颈部的宽度，通常采用丙烯材料胶带，胶带的厚度可在0.025-0.035mm范围内选择。胶带的宽度可为11mm。
胶带的常用厚度为0.031mm；胶带1可采用粘贴或热合的方式与壳体2的内侧表面上。
Claims (3)
1.一种安全锂离子电池，包括呈圆柱形结构的电池壳体、电池盖、正极、隔膜、负极、电解质，圆柱形电池壳体的上部具有一向内凹入的环形颈部，其特征在于，在所述向内凹入的环形颈部的内侧壁表面上设有一环形胶带。
2.根据权利要求1所述的安全锂离子电池，其特征在于，所述胶带的宽度大于或等于颈部的宽度，可采用丙烯胶带，胶带的厚度可在0.025-0.035mm范围内选择。
3.根据权利要求2所述的安全锂离子电池，其特征在于，所述胶带的宽度为11mm，胶带的厚度为0.031mm。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200489761U CN201032638Y (zh) | 2007-03-01 | 2007-03-01 | 安全锂离子电池 |
| US11/759,248 US20080213655A1 (en) | 2007-03-01 | 2007-06-07 | Safe lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200489761U CN201032638Y (zh) | 2007-03-01 | 2007-03-01 | 安全锂离子电池 |
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| Publication Number | Publication Date |
|---|---|
| CN201032638Y true CN201032638Y (zh) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200489761U Expired - Fee Related CN201032638Y (zh) | 2007-03-01 | 2007-03-01 | 安全锂离子电池 |
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| Country | Link |
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| US (1) | US20080213655A1 (zh) |
| CN (1) | CN201032638Y (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311064A (zh) * | 2019-06-19 | 2019-10-08 | 华富(江苏)锂电新技术有限公司 | 一种具有加热功能的锂离子电池圆柱外壳及其制备方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2394324B1 (de) | 2009-02-09 | 2015-06-10 | VARTA Microbattery GmbH | Knopfzellen und verfahren zu ihrer herstellung |
| DE102009060800A1 (de) | 2009-06-18 | 2011-06-09 | Varta Microbattery Gmbh | Knopfzelle mit Wickelelektrode und Verfahren zu ihrer Herstellung |
| CN101847756B (zh) * | 2010-06-11 | 2012-01-04 | 东莞市德而泰新能源科技有限公司 | 一种圆柱形铝壳束腰封口正负极同向引出的锂离子电池 |
| CN104022236A (zh) * | 2014-06-13 | 2014-09-03 | 深圳市崧鼎科技有限公司 | 一种锂离子电池和金属壳体结构 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3260675B2 (ja) * | 1997-10-14 | 2002-02-25 | 日本碍子株式会社 | リチウム二次電池 |
| JP3683181B2 (ja) * | 2000-03-30 | 2005-08-17 | 日本碍子株式会社 | リチウム二次電池 |
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2007
- 2007-03-01 CN CNU2007200489761U patent/CN201032638Y/zh not_active Expired - Fee Related
- 2007-06-07 US US11/759,248 patent/US20080213655A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311064A (zh) * | 2019-06-19 | 2019-10-08 | 华富(江苏)锂电新技术有限公司 | 一种具有加热功能的锂离子电池圆柱外壳及其制备方法 |
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