CN1469504A - 电化学元件 - Google Patents
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Abstract
一种具有至少一添加有锂的电极和薄的柔性壳体的电化学元件，该壳体包括两金属片，该金属片以密封方式相互连接并直接静置在至少一电极上。至少一金属片在外部设置塑料层以便增加牢固性和强度。粘接剂层布置在该金属层和该塑料层之间。该金属片由例如铜制成。该塑料层由例如聚酰亚胺制成。粘接剂层基于例如橡胶。
Description
技术领域
本发明涉及一种特别是具有至少一添加有锂的电极和薄的柔性壳体的电化学元件，该壳体由两金属片制成，该金属片直接静置在电极上并以密封方式通过粘接剂或密封层相互连接。
背景技术
需要总厚度小于0.5mm的极薄的柔性电化学元件作为有源智能卡中的能量存储器。在例如象这样的薄的电子智能卡的情况中，平的能量存储器用来为集成电路片以及例如集成的小型传感器或转发器的其他部件提供电力供应。
由于满足弯曲试验和测试方法，这种薄和柔性的电化学元件适于安装在有源智能卡内。在动态弯曲试验中，该卡在每分钟30次(＝0.5Hz)弯曲的频率下在长度上以2cm或在宽度上以1cm弯曲。在此试验中，卡必须在四个可能的方向的每一方向上经受至少250次弯曲(即总共1000次弯曲)而不损坏。在动态扭曲试验中，该卡以每分钟30次(＝0.5Hz)弯曲的频率围绕纵向轴线驱动转过±15°。标准上需要1000次扭曲，电路片不失效并且在卡上没有任何明显的机械损坏。
在这些试验中出现高机械力，特别是在电化学元件的金属外壳体上出现。在该过程中，元件的纯金属壳体可能撕裂，因此电池开口。在这种情况下，于是整个系统(也就是说卡和电化学元件或电池组一起)明显不能使用。
EP 997 959 B1描述一种具有非水质电解质并具有由层压膜制成的电化学元件。这种层压结构通常包括覆盖两侧的合成铝片，并可热成形到5mm，而且由于这些特性而通过试验。在这种情况下该塑料护层防止撕裂。
DE 101 02 125描述通过由金属或纤维增强塑料制成的局部或整体盖罩机械地加强内部布置有电化学元件的电子智能卡。
发明内容
本发明的目的在于提供一种电化学元件，该元件在经受弯曲负载和扭曲负载时满足机械强度的严格需要以便使用在有源智能卡中。
在最初所述类型的电化学元件的情况下，此目的通过权利要求1的特征实现。从属权利要求明确了本发明的有利实施例。权利要求的措词是参考说明书的内容进行的。
按照EP 997 959 B1的电化学元件根据相对厚的层压结构，即大约100μm。由于内部同样具有绝缘塑料层，其中省略内部塑料片的组件足以用于本发明。这确保与负电极和正电极的直接接触。
令人惊奇的是，已经发现，即使薄的塑料层或塑料片施加在金属片指向外部的一侧上，对于弯曲和扭曲导致非常显著的加强作用。按照本发明，象这样的片组件包括金属片和塑料片或塑料膜以及可能的粘接剂层。适合塑料的实例是聚乙烯对苯二酸酯、聚乙烯萘酸酯、聚偏二氯乙烯或聚酰亚胺。
三种主要类型的粘接剂层之间有明显区别。基于橡胶的粘接剂层允许可逆粘接。基于丙烯酸的粘接剂层可以是随后还必须进行聚合或密封的粘接剂层。基于硅酮或聚硅氧烷的粘接剂层通常是硅酮和橡胶的混合物。它们出色的特性在高温下通常有良好的强度、很少老化并可将其施加两次或以上，并且重复去除后没有残留物。所述类型特别适于以标签形式施加。基于聚硅氧烷并施加在聚偏二氯乙烯(PVC)上的粘接剂层是公知的来自Beiersdorf并且商品名为“Tesa”的粘接剂。所述聚乙烯对苯二酸盐酯可同样用来取代PVC和PI。典型的粘接剂层的厚度是大约12μm～15μm，并且在技术上它们在8μm～25μm之间变化。
不锈钢、双金属元件(镍/不锈钢)或三金属元件(镍/不锈钢/铜)通常是该金属片的代表。因此在双金属或三金属元件情况下的外镍层有利地用来与该负载电接触。内铜层对于接触电池内部并出于电化学的原因是有利的。
铜金属片的出色特性满足大量的需要。可以容易滚压形成10μm的厚度，并与不锈钢相比在外部输出导体区域内非常容易接触，并且硬度或柔度可通过滚压和退火调整。所有这些工艺可以低成本实施。另外，铜对于许多电化学元件具有充分电化学稳定性窗口。例如铜/镁合金的多种铜合金可用来代替铜。
金属片可具有8μm～55μm的厚度，最好是18μm～35μm的厚度。塑料层可以具有8μm～40μm的厚度，最好是10μm～20μm的厚度。粘接剂层可以具有1μm～25μm的厚度，最好是5μm～15μm的厚度。
电极是添加有锂的电极，但不需如此。有利的是对于在指向电极的内侧上的至少一金属片提供电化学沉积金属层以便改善粘接。具有改进粘接剂层的金属片披露于在这里作为参考的EP 02027792中。
通过实例，已经永久地涂覆或粘接并包括特别是铜片的金属片和塑料片的合成物可用来例如形成本发明电化学元件的壳体。用于电化学元件的半成品(即电池盖和电池壳)由此合成材料制成。在电极区域之外，它们由用来以密封方式粘接电池盖和电池壳的密封膜来层压。
同样可以在电化学元件的金属壳体的两个外表面的至少之一上覆盖例如硅化聚酰亚胺带或聚酯带的硅化粘接剂带。象这样的粘接剂带自粘接并永久地粘接到金属片上。
除了已经提到的在弯曲试验中机械保护之外，具有本发明合成片作为壳体的电化学元件具有更好的强度和牢固性，对于热层压期间电化学作用的电池，电化学元件具有高抗渗透性能和附加热保护性能。除了用于输出导体的小自由区域的区域之外，元件壳体进行绝缘，因此显著降低无意中的外部短路的危险。围绕输出导体的区域受到另外的稳定。金属片内可能的小孔或裂纹进行覆盖并且电池有效地受到保护不受破坏性的水、氧或二氧化碳扩散的影响。
这些和其他的特征不仅从权利要求得以明白，而且从说明书和附图中得以明白，其中对于本发明的实施例，在每种情况下可采用其本身的单个特征，或以组合形式采用两个或多个特征，并且在其他领域中，能够代表有利的实施例，对于其本身的权力具有专利性，为此要求保护其范围。
附图说明
本发明的主题将参考示意图1和2在以下文章中更为详细的描述。
图1表示最初描述类型的平电池；以及
图2表示沿线AA截取通过图1所示平电池的放大局部截面图。
具体实施方式
平电池1在由金属片5制成的薄的柔性壳体3中包括一个或多个单个电池。金属片5在电池1的外部设置塑料层9以便改善强度。塑料层9以catpon带为形式，通过粘接剂层7施加在壳体3的上表面上。上金属片5在面向平电池1内部一侧设置金属层11。下金属片5在内侧具有绝缘层6。
如虚线示意所示，单个电池13位于电池1的内部并可以由正电极和负电极形成。单个电池13具有连接到各自输出突片17的示意表示的连接件15。
制造所述元件的实例：
通过如下方式形成糊状合成物，即使用77％重量百分比并在360℃下热激活的亚锰酸盐(电解的二氧化锰)、6％重量百分比的石墨、2％重量百分比的导电碳黑、7％重量百分比的聚偏二乙烯二氟化六氟丙烯以及8％重量百分比的碳酸丙烯在丙酮中完全混合。如此得到的化合物涂抹在聚烯烃隔离件(聚丙烯)上并蒸发载体溶剂。如此得到的带在真空中(110℃历时48小时)干燥并由有机锂电解质浸渍，该电解质的成分在碳酸丙烯与乙基碳酸二甲酯的容积比为87∶13％中是0.96M LiClO4。隔离/电极合成件冲压成1.6×2.3cm2，并插入铜片壳体内。
锂预先压在盖的侧面上。如果需要，同样壳侧面用基于石墨的导电改进剂设置电化学沉积的铜微晶层。在铜和盖和壳之间的铜接触的区域内，在每种情况下设置绝缘层(密封层)，并实施超声波焊接。如此制成的本发明电化学电池适于结合在有源智能卡中，并通过弯曲试验和测试过程。
在第一实施例中，所使用的铜片在形成壳体部件之前已经设置capton带。在第二改型中，完成的电池随后使用capton带(聚酰亚胺基)或Tesa带粘接。此粘接带通过展开的方法施加在完成壳体的两侧上。
Claims (12)
1.一种具有薄的柔性壳体并具有至少一电极的电化学元件，该壳体包括两金属片，该金属片以密封方式相互连接并直接静置在至少一电极上，其中至少一金属片在外部设置塑料层以便增加牢固性和强度。
2.如权利要求1所述的电化学元件，其特征在于，该金属片通过粘接剂层或密封层相互连接。
3.如权利要求1所述的电化学元件，其特征在于，粘接剂层布置在该金属层和该塑料层之间。
4.如权利要求1所述的电化学元件，其特征在于，该金属片包括铜。
5.如权利要求1所述的电化学元件，其特征在于，该金属片包括不锈钢。
6.如权利要求1所述的电化学元件，其特征在于，该塑料层包括来自以下组中的成分，即聚乙烯对苯二酸酯、聚乙烯萘酸酯、聚偏二氯乙烯或聚酰亚胺。
7.如权利要求3所述的电化学元件，其特征在于，该粘接剂层基于以下组中的成分，即橡胶、丙烯酸、聚硅氧烷或硅酮。
8.如权利要求1所述的电化学元件，其特征在于，至少一金属片在指向该电极的内侧设置金属层。
9.如权利要求1所述的电化学元件，其特征在于，该金属片具有8μm～55μm的厚度。
10.如权利要求1所述的电化学元件，其特征在于，该塑料层具有8μm～40μm的厚度。
11.如权利要求3所述的电化学元件，其特征在于，该粘接剂层具有1μm～25μm的厚度。
12.如权利要求1所述的电化学元件，其特征在于，该电极是添加有锂的电极。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10226848A DE10226848A1 (de) | 2002-06-15 | 2002-06-15 | Galvanisches Element |
| DE10226848.7 | 2002-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1469504A true CN1469504A (zh) | 2004-01-21 |
Family
ID=29594557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031486436A Pending CN1469504A (zh) | 2002-06-15 | 2003-06-16 | 电化学元件 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20030232241A1 (zh) |
| EP (1) | EP1391947A1 (zh) |
| JP (1) | JP2004022543A (zh) |
| KR (1) | KR20030095994A (zh) |
| CN (1) | CN1469504A (zh) |
| DE (1) | DE10226848A1 (zh) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111133602A (zh) * | 2017-08-23 | 2020-05-08 | 大众汽车发电厂有限责任公司 | 用于确定电化学蓄能装置的状态或状态变化的方法和为此所准备的蓄能装置 |
| WO2023178606A1 (zh) * | 2022-03-24 | 2023-09-28 | 宁德新能源科技有限公司 | 电化学装置及用电设备 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100472504B1 (ko) * | 2002-06-17 | 2005-03-10 | 삼성에스디아이 주식회사 | 보강구조가 개선된 파우치형 이차전지 |
| DE10304824A1 (de) | 2003-01-31 | 2004-08-12 | Varta Microbattery Gmbh | Dünne elektronische Chipkarte |
| EP1577967A1 (en) * | 2004-03-19 | 2005-09-21 | Tatung Co., Ltd. | Li-battery for a webpad |
| DE102004038072A1 (de) * | 2004-07-28 | 2006-03-23 | Varta Microbattery Gmbh | Galvanisches Element |
| US8095140B2 (en) * | 2006-03-27 | 2012-01-10 | Motorola Solutions, Inc. | Regrouping wireless devices |
| DE102008015965A1 (de) * | 2008-03-20 | 2009-09-24 | Varta Microbattery Gmbh | Galvanisches Element mit Foliendichtung |
| DE102009046402A1 (de) * | 2009-11-04 | 2011-05-05 | SB LiMotive Company Ltd., Suwon | Batteriesystem mit erhöhter Gehäuse-Durchstossfestigkeit |
| DE102010055615A1 (de) | 2010-12-22 | 2012-06-28 | Daimler Ag | Einzelzelle für eine Batterie und Verfahren zur Herstellung einer solchen Einzelzelle |
| AT514326B1 (de) * | 2013-04-19 | 2014-12-15 | Avl List Gmbh | Batteriezelle |
| DE102014223194A1 (de) | 2014-11-13 | 2016-05-19 | Varta Microbattery Gmbh | Sekundäres elektrochemisches Element |
| EP2966709B1 (de) | 2014-07-09 | 2018-01-10 | VARTA Microbattery GmbH | Sekundäres elektrochemisches Element |
| EP3435449B1 (de) | 2014-07-09 | 2019-09-04 | VARTA Microbattery GmbH | Sekundäre elektrochemische zelle |
| EP2983236B1 (de) | 2014-08-08 | 2017-10-18 | VARTA Microbattery GmbH | Sekundäres elektrochemisches Element auf Basis von Nickel / Eisen |
| EP3104446B1 (de) | 2015-06-12 | 2022-03-02 | VARTA Microbattery GmbH | Verfahren zum betrieb eines wiederaufladbaren speichersystems für elektrische energie sowie vorrichtung zur kontrolle und durchführung des ladevorgangs des speichersystems |
| EP3324479B1 (de) | 2016-11-21 | 2019-05-08 | VARTA Microbattery GmbH | Asymmetrische, sekundäre elektrochemische zelle |
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| JPS5946755A (ja) * | 1982-09-08 | 1984-03-16 | Tomoyuki Aoki | 電池 |
| US4666799A (en) * | 1983-09-19 | 1987-05-19 | Medtronic, Inc. | Current collectors for batteries having cathode-electrolytes and batteries incorporating same |
| JPS62117253A (ja) * | 1985-11-18 | 1987-05-28 | Japan Storage Battery Co Ltd | 薄形密閉鉛蓄電池 |
| JPS63121244A (ja) * | 1986-11-11 | 1988-05-25 | Dainippon Printing Co Ltd | フレキシブル薄型電池 |
| US5227264A (en) * | 1991-02-14 | 1993-07-13 | Hydro-Quebec | Device for packaging a lithium battery |
| US5558957A (en) * | 1994-10-26 | 1996-09-24 | International Business Machines Corporation | Method for making a thin flexible primary battery for microelectronics applications |
| US5591540A (en) * | 1995-06-26 | 1997-01-07 | Motorola, Inc. | Packaging for an electrochemical device and device using same |
| US5989751A (en) * | 1997-06-16 | 1999-11-23 | International Business Machines Corporation | High energy density, flexible lithium primary batteries |
| JP4491843B2 (ja) * | 1998-02-24 | 2010-06-30 | ソニー株式会社 | リチウムイオン二次電池、およびリチウムイオン二次電池の容器の封じ方法 |
| US6277520B1 (en) * | 1999-03-19 | 2001-08-21 | Ntk Powerdex, Inc. | Thin lithium battery with slurry cathode |
-
2002
- 2002-06-15 DE DE10226848A patent/DE10226848A1/de not_active Withdrawn
-
2003
- 2003-05-17 EP EP03011286A patent/EP1391947A1/de not_active Withdrawn
- 2003-06-05 KR KR10-2003-0036159A patent/KR20030095994A/ko not_active Application Discontinuation
- 2003-06-09 US US10/457,109 patent/US20030232241A1/en not_active Abandoned
- 2003-06-12 JP JP2003167823A patent/JP2004022543A/ja active Pending
- 2003-06-16 CN CNA031486436A patent/CN1469504A/zh active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111133602A (zh) * | 2017-08-23 | 2020-05-08 | 大众汽车发电厂有限责任公司 | 用于确定电化学蓄能装置的状态或状态变化的方法和为此所准备的蓄能装置 |
| CN111133602B (zh) * | 2017-08-23 | 2022-09-13 | 大众汽车发电厂有限责任公司 | 用于确定电化学蓄能装置的状态或状态变化的方法和为此所准备的蓄能装置 |
| WO2023178606A1 (zh) * | 2022-03-24 | 2023-09-28 | 宁德新能源科技有限公司 | 电化学装置及用电设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10226848A1 (de) | 2003-12-24 |
| JP2004022543A (ja) | 2004-01-22 |
| EP1391947A1 (de) | 2004-02-25 |
| KR20030095994A (ko) | 2003-12-24 |
| US20030232241A1 (en) | 2003-12-18 |
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