CN106252713A - 一种低成本高空间利用的锂离子电池极其组成的并联预化成模块 - Google Patents
一种低成本高空间利用的锂离子电池极其组成的并联预化成模块 Download PDFInfo
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Abstract
一种低成本高空间利用的锂离子电池组成的并联预化成模块，其特征是:铝壳内采用卷绕方式设置有卷芯，卷芯采用同侧出极耳方式，铝壳顶面设置有两个开口，开口处焊接铝塑膜，铝塑膜带有极耳穿过的孔，铝壳安装有气囊，铝壳的侧面设置有侧开口，侧开口连接有气囊的连接孔，的隔膜包括微孔PET薄膜和多微孔材料层，所述微孔PET薄膜上分布有沿厚度方向布置的直微孔，所述多微孔材料层涂布于微孔PET薄膜上形成双层层叠网状微孔结构，所述多微孔材料层的孔隙率为10％～90％、孔径小于2微米。所述微孔PET薄膜的厚度为2微米～50微米，使用夹具将电芯并联于一起进行并联预化成。
Description
技术领域
本专利涉及一种锂离子电池领域，尤其涉及一种低成本高空间利用的锂离子电池极其组成的并联预化成模块。
背景技术
1、目前电池市场主要存在方形、软包、圆柱电池，软包电池采用铝塑复合膜包装，软包锂离子电池的机械强度不高，在出现安全事故如内短路等情况下，电池容易鼓起排气，降低了爆炸风险，而铝壳电池采用全密封工艺，同样条件下，气压不易排出，增大了安全隐患。铝壳电池制造自动化程度高于软包锂离子电池，因此，在一定程度上降低了人为因素对产品一致性影响，同时节省了人工成本。
2、传统的方形电池内部包括焊接极耳部分、塑料绝缘件、泄压装置等组件占用了5-10mm的内部空间，限制了体积比能量的提升。
3、传统的挤压式排气方式增加了工作量，浪费工作时间，限制电池生产的流畅性，限制产量的提升；传统的抽真空方式排气对设备的精密性要求较高，作业难度大，操作复杂。
4、传统的电芯预化成方式，因使用的电流小，与充放电模块实际的负载能力差异大，不能充分发挥模块的作用。传统的软包预化成使用夹具工作量大，操作不方便。
发明内容
本发明的目的是提供了一种可以最大限度利用壳体内部空间并配有合适的可重复利用橡胶气囊，进行并联预化成；同时使用夹具将电芯并联与一起，起到固定作用，使预化成产生的气体及时排出，减少排气工步的一种低成本高空间利用的锂离子电池，为了实现上述目的本专利的技术方案为：
一种低成本高空间利用的锂离子电池，包括铝壳，其特征是: 铝壳内采用卷绕方式设置有卷芯，卷芯采用同侧出极耳方式，铝壳顶面设置有两个开口，开口处焊接铝塑膜，铝塑膜带有极耳穿过的孔，铝壳安装有气囊，铝壳的侧面设置有侧开口，侧开口连接有气囊的连接孔。
所述的卷芯包括隔膜，其特征是：所述的隔膜包括微孔PET薄膜和多微孔材料层，所述微孔PET薄膜上分布有沿厚度方向布置的直微孔，所述多微孔材料层涂布于微孔PET薄膜上形成双层层叠网状微孔结构，所述多微孔材料层的孔隙率为10％～90％、孔径小于2微米。所述微孔PET薄膜的厚度为2微米～50微米。
一种低成本高空间利用的锂离子电池组成的并联预化成模块，其特征是：使用夹具将电芯并联于一起进行并联预化成。
本专利的优点：
1、电芯采用铝壳，盖板上焊接铝塑膜，铝塑膜焊接强度0.6～0.7MPa；焊接铝塑膜是为了最大程度节约电池内外部不必要结构件的空间；铝塑膜焊接强度的设定是为了在极限情况下电芯内部胀气时焊缝裂开，及时泄压，降低危险系数。此创新点同时利用了铝壳与软包电池的优点。
2、电池采用卷绕方式，最大限度利用壳体内部空间；卷芯采用同侧出极耳方式，内部除卷芯和绝缘层外不含有其他结构件。
3、注液口/排气口设于电芯侧面，并配有合适的可重复利用橡胶气囊；预化成电芯产气时，气体进入气囊内，预化成结束后取下气囊并使用铝铆钉封口。
4、电池预化成电流较小，为最大效率利用模块，进行并联预化成；同时使用夹具将电芯并联与一起，起到固定作用，使预化成产生的气体及时排出，减少排气工步。
5、多微孔材料层可以在微孔PET薄膜的成型时的蚀刻反应碱溶液中保持稳定不受蚀刻，而且多微孔材料层具有锂离子可自由迁移的微孔结构，双层层叠网状微孔结构的双层层叠微孔弥补了传统微孔PET薄膜上的微孔易发生重孔的缺陷以及抗锂枝晶穿刺的缺陷，同时具有优异的电解液浸润性与热稳定性能，多微孔材料层的引入，使得微孔PET薄膜的直微孔孔径可以做得更大，从而低孔密度即可实现高孔密度的离子迁移通道要求，提升了生产效率。
说明书附图
图1为本专利的结构示意图；
图2为本专利电池铝壳的结构示意图；
图3为本专利铝壳的结构示意图。
图4为本专利并联预化成的结构示意图；
图5为本专利卷芯的结构示意图。
附图中
1、铝壳；2、铝塑膜；3、极耳；4、气囊；5、开口；6、侧开口；7、卷芯；8、多微孔材料层；9、微孔PET薄膜；10、直微孔。
具体实施方式
下面结合附图1~5对本专利进行进一步的说明：
1、一种低成本高空间利用的锂离子电池，包括铝壳1，其特征是: 铝壳1内采用卷绕方式设置有卷芯7，卷芯7采用同侧出极耳3方式，铝壳1顶面设置有两个开口5，开口5处焊接铝塑膜2，铝塑膜2带有极耳3穿过的孔，铝壳1安装有气囊4，铝壳1的侧面设置有侧开口6，侧开口6连接有气囊4的连接孔。
所述的卷芯7包括隔膜，其特征是：所述的隔膜5包括微孔PET薄膜9 和多微孔材料层8 ，所述微孔PET薄膜9 上分布有沿厚度方向布置的直微孔10 ，所述多微孔材料层 8 涂布于微孔PET薄膜9 上形成双层层叠网状微孔结构，所述多微孔材料层8 的孔隙率为10％～90％、孔径小于2微米。所述微孔PET薄膜9的厚度为2微米～50微米。
一种低成本高空间利用的锂离子电池组成的并联预化成模块，其特征是，使用夹具将电芯并联于一起进行并联预化成。
Claims (3)
1.一种低成本高空间利用的锂离子电池，包括铝壳（1），其特征是: 铝壳（1）内采用卷绕方式设置有卷芯（7），卷芯（7）采用同侧出极耳（3）方式，铝壳（1）顶面设置有两个开口（5），开口（5）处焊接铝塑膜（2），铝塑膜（2）带有极耳（3）穿过的孔，铝壳（1）安装有气囊（4），铝壳（1）的侧面设置有侧开口（6），侧开口（6）连接有气囊（4）的连接孔。
2.根据权利要求1所述的一种低成本高空间利用的锂离子电池，所述的卷芯（7）包括隔膜，其特征是：所述的隔膜（5）包括微孔PET薄膜( 9 )和多微孔材料层( 8 )，所述微孔PET薄膜( 9 )上分布有沿厚度方向布置的直微孔( 10 )，所述多微孔材料层( 8 )涂布于微孔PET薄膜(9 )上形成双层层叠网状微孔结构，所述多微孔材料层( 8 )的孔隙率为10％～90％、孔径小于2微米，所述微孔PET薄膜(9)的厚度为2微米～50微米。
3.一种使用如权1或权2所述的一种低成本高空间利用的锂离子电池组成的并联预化成模块，其特征是：使用夹具将电芯并联于一起进行预化成。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601961A (zh) * | 2017-02-20 | 2017-04-26 | 南通耐维特电源有限公司 | 便于电芯卷材排气的锂电池 |
| CN109888400A (zh) * | 2019-04-10 | 2019-06-14 | 珠海冠宇电池有限公司 | 一种锂离子电池化成夹具及含有该夹具的化成设备 |
| CN115207581A (zh) * | 2022-09-19 | 2022-10-18 | 深圳市铂纳特斯自动化科技有限公司 | 一种方形锂电池全自动充氦打钉装置 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601961A (zh) * | 2017-02-20 | 2017-04-26 | 南通耐维特电源有限公司 | 便于电芯卷材排气的锂电池 |
| CN106601961B (zh) * | 2017-02-20 | 2023-08-08 | 南通耐维特电源有限公司 | 便于电芯卷材排气的锂电池 |
| CN109888400A (zh) * | 2019-04-10 | 2019-06-14 | 珠海冠宇电池有限公司 | 一种锂离子电池化成夹具及含有该夹具的化成设备 |
| CN109888400B (zh) * | 2019-04-10 | 2021-03-02 | 珠海冠宇电池股份有限公司 | 一种锂离子电池化成夹具及含有该夹具的化成设备 |
| CN115207581A (zh) * | 2022-09-19 | 2022-10-18 | 深圳市铂纳特斯自动化科技有限公司 | 一种方形锂电池全自动充氦打钉装置 |
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