CN111682129A - 一种金属壳扣式锂离子电池 - Google Patents
一种金属壳扣式锂离子电池 Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 161
- 239000002184 metal Substances 0.000 title claims abstract description 161
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 40
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- 238000002161 passivation Methods 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 4
- 239000004813 Perfluoroalkoxy alkane Substances 0.000 claims description 4
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 4
- 238000010668 complexation reaction Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 2
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- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 claims description 2
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- 238000004519 manufacturing process Methods 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 16
- 238000007599 discharging Methods 0.000 description 8
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
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Abstract
本发明涉及锂电池领域,其公开了一种金属壳扣式锂离子电池,包括金属壳体,装设在金属壳体内部的电芯,装设在金属壳体外侧的端子,装设在金属壳体与端子之间并分别与金属壳体和端子绝缘密封的绝缘件,所述电芯上设置有与金属壳体电连接的并具有正极性或负极性的至少一个第一极耳,所述电芯上还设置有与端子电连接的并具有负极性或正极性的至少一个第二极耳,所述金属壳体和端子分别通过热合或粘合的方式与绝缘件密封连接,本发明以金属壳体作为其中一极性,以端子作为另一极性,纵观电芯的轴向和径向,电池结构占有空间较小,提高了电池的能量密度,本发明具有结构简单、密封可靠性高和能量密度高的优点,满足高效的生产需求。
Description
技术领域
本发明涉及锂电池领域,特别是涉及一种金属壳扣式锂离子电池。
背景技术
目前大多数电池厂家在制作薄形金属壳锂二次电池时,电芯外侧的外壳采用圆形金属壳,其结构分为三层:内壳体、外壳体以及密封圈,因此现有技术中的锂离子电池在径向上占用较多空间体积,导致电池产品不能充分利用直径方向的空间,因此存在电池的能量密度较低的技术问题,其中内壳体和外壳体之间的密封采用R角密封技术,其之间依靠压缩塑料密封圈实现密封。然而现有技术手段对R角的测量不是很精准,因此不能完全保证内壳体和外壳体之间的良好密封性,存在产品可靠性低、合格率低的技术问题。另外,采用钢壳的内壳体和外壳体分别作为正负极,电池产品很容易出现短路的问题。
为改善上述技术问题,近年来也有开发出新的结构,即采用目前动力铝壳电池的相近结构,如图1所示为现有技术中的电池产品,其采用单层金属外壳83做负极,金属外壳83一侧设置另一极性的铝帽81,金属外壳83和铝帽81之间的绝缘处理方式为铆接的结构,该铆接结构最大的不足是电芯轴向的一侧共有五层结构:即铝帽81、第一绝缘层82、金属外壳83、第二绝缘层84以及铆钉85,五层的结构占用空间太大,通常要到1mm以上,因此电池产品不能充分利用轴向的空间,存在电池的能量密度较低的技术问题。
发明内容
本发明的目的在于克服现有技术中的上述缺陷,提供一种结构简单、密封可靠性高和能量密度高的金属壳扣式锂离子电池。
为实现上述目的,本发明提供了一种金属壳扣式锂离子电池,包括金属壳体,装设在金属壳体内部的电芯,装设在金属壳体外侧的端子,装设在金属壳体与端子之间并分别与金属壳体和端子绝缘密封的绝缘件,所述电芯上设置有与金属壳体电连接的并具有正极性或负极性的至少一个第一极耳,所述电芯上也设置有与端子电连接的并具有负极性或正极性的至少一个第二极耳,所述金属壳体的极性与端子的极性相反,所述金属壳体和端子分别通过热合或粘合的方式与绝缘件密封连接。
优选的,所述金属壳体与绝缘件相接触的端面、所述端子与绝缘件相接触的端面均作金属钝化或络合的表面处理。
优选的,所述第二极耳与金属壳体之间设置有第一绝缘层。
优选的,所述第二极耳朝向金属壳体的部分端面设置有第二绝缘层。
优选的,所述金属壳体包括金属外壳,以及设置在金属外壳一侧与金属外壳密封连接的盖板,所述电芯装设在金属外壳的内部,所述第一极耳与金属外壳或盖板电连接,所述端子设置在盖板或金属外壳的外侧并通过绝缘件与盖板或金属外壳绝缘密封。
优选的,所述金属外壳、盖板或端子的内侧或外侧端面设置有用于泄掉内部过高气压的安全阀。
优选的,所述金属外壳或盖板上开有注液孔,所述金属外壳或盖板的外侧装设有用于密封所述注液孔的盖片。
优选的,所述盖片的内侧或外侧设置有用于泄掉内部过高气压的安全阀。
优选的,所述安全阀为具有排气泄压功能的安全排气线。
优选的,所述绝缘件为PP、PE、PEEK、PFA、尼龙或环氧树脂的非金属材料。
与现有技术相比,本发明的有益效果在于:
(1)本发明以金属壳体作为其中一极性,以端子作为另一极性,其中金属壳体和端子分别通过热合或粘合的方式与绝缘件密封连接,其能够保证端子和金属壳体之间有非常好的密封性,防止电解液漏液,绝缘件也很好地保证金属壳体和端子之间不会出现短路的问题,大大提高了电池产品的合格率;
(2)纵观电池的径向,电芯的外侧只有单层的金属壳体,因此本发明大大减小了电池在径向上的结构占有空间,提高了电池的能量密度;
(3)另外纵观电芯的轴向的两侧,其中一侧只有金属壳体,由于本发明中金属壳体和端子之间采用的不是铆接结构,而是通过绝缘件热合或粘合的方式实现金属壳体和端子之间的绝缘密封连接,因此电芯轴向的另一侧从内部到外部依次为金属壳体、绝缘件和端子,该侧三层的结构大大减小了电池在轴向上的结构占有空间,进一步提高了电池的能量密度,整体电池的能量密度提高了20%以上,而且本发明零件较少、具有结构简单和装配方便的优点,满足了高效的生产需求。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是背景技术中提供现有技术的电池产品的结构示意图;
图2是本发明提供的实施例一的结构示意图;
图3是本发明提供的实施例二的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例一
本发明提供了一种金属壳扣式锂离子电池,如图2所示为该电池的截面示意图,其包括金属壳体31,装设在金属壳体31内部的电芯9,装设在金属壳体31外侧的端子6,装设在金属壳体31与端子6之间并分别与金属壳体31和端子6绝缘密封的绝缘件5,所述电芯9上设置有与金属壳体31电连接的并具有正极性或负极性的至少一个第一极耳10,所述电芯9上也设置有与端子6电连接的并具有负极性或正极性的至少一个第二极耳4,所述金属壳体31的极性与端子6的极性相反,所述金属壳体31和端子6分别通过热合或粘合的方式与绝缘件5密封连接,其中绝缘件5为PP、PE、PEEK、PFA、尼龙或环氧树脂等非金属材料。
本实施例以金属壳体31作为其中一极性,以端子6作为另一极性,其中金属壳体31和端子6分别通过热合或粘合的方式与绝缘件5密封连接,其能够保证端子6和金属壳体31之间有非常好的密封性,防止电解液漏液,也很好地保证金属壳体31和端子6之间不会出现短路的问题,大大提高了电池产品的合格率,更为具体的,所述金属壳体31与绝缘件5相接触的端面、所述端子6与绝缘件5相接触的端面均作金属钝化或络合的表面处理,由于端子6和金属壳体31作了此表面处理,便于保证金属壳体31和绝缘件5之间、端子6和绝缘件5之间的良好密封性。
另外纵观电池的径向,电芯9的外侧只有单层的金属壳体31,因此本实施例大大减小了电池在径向上的结构占有空间,提高了电池的能量密度;另外纵观电芯9轴向的两侧,其中一侧只有金属壳体31,由于本实施例中金属壳体31和端子6之间采用的不是铆接结构,而是通过绝缘件5热合或粘合的方式实现金属壳体31和端子6之间的绝缘密封连接,因此电芯9轴向的另一侧从内部到外部依次为金属壳体31、绝缘件5和端子6,该侧三层的结构大大减小了电池在轴向上的结构占有空间,进一步提高了电池的能量密度,整体电池的能量密度提高了20%以上,而且本实施例零件较少、具有结构简单和装配方便的优点,满足了高效的生产需求。
在本实施例中金属壳体31包括金属外壳1,以及设置在金属外壳1一侧与金属外壳1密封连接的盖板2,其中盖板2与金属外壳1焊接密封,该密封能够很好地保证盖板2与金属外壳1之间的密封性,避免电池漏液的现象发生,其中电芯9装设在金属外壳1的内部,其中第一极耳10与金属外壳1或盖板2电连接,本实施例优选地第一极耳10与金属外壳1的内侧电连接,所述端子6设置在盖板2或金属外壳1的外侧并通过绝缘件5与盖板2或金属外壳1绝缘密封,本实施例优选地端子6设置在盖板2的外侧并通过绝缘件5与盖板2绝缘密封,因此该盖板2与绝缘件5相接触的端面作金属钝化或络合的表面处理,保证盖板2与绝缘件5之间良好的密封性,该密封性好,避免电池漏液的现象发生。
所述第二极耳4与盖板2之间设置有第一绝缘层21,该第一绝缘层21能够保证第二极耳4与盖板2不会形成短路,保证电池产品的稳定性,当然第二极耳4朝向盖板2的部分端面也可以设置有第二绝缘层,其也可以防止第二极耳4与盖板2形成短路的现象,保证电池产品的稳定性。
所述金属外壳1、盖板2或端子6的内侧或外侧端面设置有用于泄掉内部过高气压的安全阀3,本实施例中优选地盖板2的内侧端面设置有用于泄掉内部过高气压的安全阀3,该安全阀3的设置能够提高电池的安全性,延长电池的使用寿命,本实施例中优选地安全阀3为具有排气泄压功能的安全排气线,当滥用电池或者电池短路或电池发热时其内部气压容易过大,此时内部气体冲破安全线排气泄压。
另外金属外壳1或盖板2上开有注液孔7,本实施例中优选地盖板2上开有注液孔7,注液孔7可以通过钢珠形式实现密封或者铆钉形式实现密封,所述金属外壳1或盖板2的外侧装设有用于密封所述注液孔7的盖片8,当金属外壳1、盖板2或端子6的内侧或外侧端面没有安全阀3,则该盖片8的内侧或外侧可以设置有用于泄掉内部过高气压的安全阀3。
电芯9可以是卷绕型结构,还可以是按照正极片、隔膜和负极片不断循环的顺序叠加而成的层叠状结构,所述隔膜制作成袋式,其将正极片或负极片包裹在内,其中多层正极片之间为并联,其中多层负极片之间为并联。
实施例二
本发明提供了另一种金属壳扣式锂离子电池,其包括金属壳体31,如图3所示为该电池的截面示意图,装设在金属壳体31内部的电芯18,装设在金属壳体31外侧的端子15,装设在金属壳体31与端子15之间并分别与金属壳体31和端子15绝缘密封的绝缘件14,所述电芯18上设置有与金属壳体31电连接的并具有正极性或负极性的至少一个第一极耳19,所述电芯18上也设置有与端子15电连接的并具有负极性或正极性的至少一个第二极耳13,所述金属壳体31的极性与端子15的极性相反,所述金属壳体31和端子15分别通过热合或粘合的方式与绝缘件14密封连接,其中绝缘件14为PP、PE、PEEK、PFA、尼龙或环氧树脂等非金属材料。
本实施例以金属壳体31作为其中一极性,以端子15作为另一极性,其中金属壳体31和端子15通过绝缘件14实现绝缘密封,其能够保证端子15和金属壳体31之间有非常好的密封性,也很好地保证金属壳体31和端子15之间不会出现短路的问题,大大提高了电池产品的合格率,更为具体的,所述金属壳体31与绝缘件14相接触的端面、所述端子15与绝缘件14相接触的端面均作金属钝化或络合的表面处理,由于端子15和金属壳体31作了此表面处理,便于保证金属壳体31和绝缘件14之间、端子15和绝缘件14之间的良好密封性。
另外纵观电池的径向,电芯18的外侧只有单层的金属壳体31,因此本实施例大大减小了电池在径向上的结构占有空间,提高了电池的能量密度;另外纵观电芯18轴向的两侧,其中一侧只有金属壳体31,由于本实施例中金属壳体31和端子15之间采用的不是铆接结构,而是通过绝缘件14热合或粘合的方式实现金属壳体31和端子15之间的绝缘密封连接,因此电芯18轴向的另一侧从内部到外部依次为金属壳体31、绝缘件14和端子15,该侧三层的结构大大减小了电池在轴向上的结构占有空间,进一步提高了电池的能量密度,整体电池的能量密度提高了20%以上,而且本实施例零件较少、具有结构简单和装配方便的优点,满足了高效的生产需求。
在本实施例中金属壳体31包括金属外壳12,以及设置在金属外壳12一侧与金属外壳12密封连接的盖板11,其中盖板11与金属外壳12焊接密封,该密封能够很好地保证盖板11与金属外壳12之间的密封性,避免电池漏液的现象发生,其中电芯18装设在金属外壳12的内部,其中第一极耳19与金属外壳12或盖板11电连接,本实施例优选地第一极耳19与盖板11的内侧电连接,所述端子15设置在盖板11或金属外壳12的外侧并通过绝缘件14与盖板11或金属外壳12绝缘密封,本实施例优选地端子15设置在金属外壳12的外侧并通过绝缘件14与金属外壳12绝缘密封,因此该金属外壳12与绝缘件14相接触的端面作金属钝化或络合的表面处理,保证金属外壳12与绝缘件14之间良好的密封性,该密封性好,避免电池漏液的现象发生。
所述第二极耳13与金属外壳12之间设置有第一绝缘层22,该第一绝缘层22能够保证第二极耳13与金属外壳12不会形成短路,保证电池产品的稳定性,当然第二极耳13朝向金属外壳12的部分端面可以设置第二绝缘层,其也可以防止第二极耳13与金属外壳12形成短路的现象,保证电池产品的稳定性。
所述金属外壳12、盖板11或端子15的内侧或外侧端面设置有用于泄掉内部过高气压的安全阀20,本实施例中优选地盖板11的内侧端面设置有用于泄掉内部过高气压的安全阀20,该安全阀20的设置能够提高电池的安全性,延长电池的使用寿命,本实施例中优选地安全阀20为具有排气泄压功能的安全排气线,当滥用电池或者电池短路或电池发热时其内部气压容易过大,此时内部气体冲破安全线排气泄压。
另外金属外壳12或盖板11上开有注液孔16,本实施例中优选地金属外壳12上开有注液孔16,注液孔16可以通过钢珠形式实现密封或者铆钉形式实现密封,所述金属外壳12或盖板11的外侧装设有用于密封所述注液孔16的盖片17,如果金属外壳12、盖板11或端子15的内侧或外侧端面没有设置安全阀20,则该盖片17的内侧或外侧可以设置有用于泄掉内部过高气压的安全阀20。
电芯18可以是卷绕型结构,还可以是按照正极片、隔膜和负极片不断循环的顺序叠加而成的层叠状结构,所述隔膜制作成袋式,其将正极片或负极片包裹在内,其中多层正极片之间为并联,其中多层负极片之间为并联。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (10)
1.一种金属壳扣式锂离子电池,其特征在于,包括金属壳体,装设在金属壳体内部的电芯,装设在金属壳体外侧的端子,装设在金属壳体与端子之间并分别与金属壳体和端子绝缘密封的绝缘件,所述电芯上设置有与金属壳体电连接的并具有正极性或负极性的至少一个第一极耳,所述电芯上也设置有与端子电连接的并具有负极性或正极性的至少一个第二极耳,所述金属壳体的极性与端子的极性相反,所述金属壳体和端子分别通过热合或粘合的方式与绝缘件密封连接。
2.根据权利要求1所述的一种金属壳扣式锂离子电池,其特征在于,所述金属壳体与绝缘件相接触的端面、所述端子与绝缘件相接触的端面均作金属钝化或络合的表面处理。
3.根据权利要求1所述的一种金属壳扣式锂离子电池,其特征在于,所述第二极耳与金属壳体之间设置有第一绝缘层。
4.根据权利要求1所述的一种金属壳扣式锂离子电池,其特征在于,所述第二极耳朝向金属壳体的部分端面设置有第二绝缘层。
5.根据权利要求1所述的一种金属壳扣式锂离子电池,其特征在于,所述金属壳体包括金属外壳,以及设置在金属外壳一侧与金属外壳密封连接的盖板,所述电芯装设在金属外壳的内部,所述第一极耳与金属外壳或盖板电连接,所述端子设置在盖板或金属外壳的外侧并通过绝缘件与盖板或金属外壳绝缘密封。
6.根据权利要求5所述的一种金属壳扣式锂离子电池,其特征在于,所述金属外壳、盖板或端子的内侧或外侧端面设置有用于泄掉内部过高气压的安全阀。
7.根据权利要求5所述的一种金属壳扣式锂离子电池,其特征在于,所述金属外壳或盖板上开有注液孔,所述金属外壳或盖板的外侧装设有用于密封所述注液孔的盖片。
8.根据权利要求7所述的一种金属壳扣式锂离子电池,其特征在于,所述盖片的内侧或外侧设置有用于泄掉内部过高气压的安全阀。
9.根据权利要求6或8任一项所述的一种金属壳扣式锂离子电池,其特征在于,所述安全阀为具有排气泄压功能的安全排气线。
10.根据权利要求1~8任一项所述的一种金属壳扣式锂离子电池,其特征在于,所述绝缘件为PP、PE、PEEK、PFA、尼龙或环氧树脂的非金属材料。
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WO2020037535A1 (zh) | 2018-08-22 | 2020-02-27 | 珠海微矩实业有限公司 | 一种微型电池 |
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JP7549046B2 (ja) * | 2020-06-03 | 2024-09-10 | チューハイ コスミクス バッテリー カンパニー,リミテッド | ボタン電池及びその製造方法、電子機器 |
-
2020
- 2020-06-05 CN CN202010502381.9A patent/CN111682129A/zh active Pending
- 2020-09-30 US US17/039,974 patent/US11901569B2/en active Active
- 2020-10-27 DE DE202020106115.1U patent/DE202020106115U1/de active Active
- 2020-12-21 JP JP2020005502U patent/JP3230968U/ja active Active
- 2020-12-24 EP EP20217263.1A patent/EP3920297B1/en active Active
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2021
- 2021-02-08 KR KR1020210017289A patent/KR20210152928A/ko active Application Filing
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2024
- 2024-02-26 KR KR1020240027409A patent/KR20240032772A/ko not_active Application Discontinuation
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WO2022065917A1 (ko) * | 2020-09-24 | 2022-03-31 | 주식회사 엘지에너지솔루션 | 버튼형 이차전지 및 그 조립장치 |
WO2022104958A1 (zh) * | 2020-11-18 | 2022-05-27 | 江门市元熙科技有限公司 | 一种扣式电池 |
CN112968235A (zh) * | 2021-02-03 | 2021-06-15 | 惠州亿纬锂能股份有限公司 | 电池盖帽及电池 |
WO2022227650A1 (zh) * | 2021-04-30 | 2022-11-03 | 国研新能(深圳)技术有限公司 | 电池壳和电池 |
WO2023070949A1 (zh) * | 2021-10-27 | 2023-05-04 | 广东维都利新能源有限公司 | 一种快速固化密封的集成电极结构及制造方法一种快速固化密封的集成电极结构及制造方法 |
Also Published As
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DE202020106115U1 (de) | 2020-11-09 |
KR20240032772A (ko) | 2024-03-12 |
US20210384482A1 (en) | 2021-12-09 |
KR20210152928A (ko) | 2021-12-16 |
EP3920297B1 (en) | 2023-08-16 |
EP3920297C0 (en) | 2023-08-16 |
JP3230968U (ja) | 2021-03-04 |
US11901569B2 (en) | 2024-02-13 |
EP3920297A1 (en) | 2021-12-08 |
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