CN108023112A - 二次电池 - Google Patents

二次电池 Download PDF

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CN108023112A
CN108023112A CN201710546235.4A CN201710546235A CN108023112A CN 108023112 A CN108023112 A CN 108023112A CN 201710546235 A CN201710546235 A CN 201710546235A CN 108023112 A CN108023112 A CN 108023112A
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secondary cell
aluminium foil
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沈孟纬
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Lumimodule Optical Corp
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Abstract

一种二次电池,包括多个表面上涂布有正极材料的铝箔,此些铝箔中的每一个通过胶带与相邻的铝箔连接且两相邻的铝箔之间保留有预定间隙,此些铝箔中的每一个具有电极耳,此些电极耳并联连接以增加充放电电流且共同作为二次电池的正极;多个表面上涂布有负极材料的铝箔,此些铝箔中的每一个通过胶带与相邻的铝箔连接且两相邻的铝箔之间保留有预定间隙,此些铝箔中的每一个具有电极耳,此些电极耳并联连接以增加充放电电流且共同作为二次电池的负极;通过胶带连接在一起的涂布有正极材料的铝箔与涂布有负极材料的铝箔通过置于它们之间的隔离膜重叠在一起且被圈绕成合适的形状;用于密封地放置圈绕成合适形状的铝箔的外壳;及注入到外壳内的电解液。

Description

二次电池
技术领域
本发明涉及一种同时具有圈绕方式和堆栈方式生产优点的二次电池。
背景技术
无论是18650电池、22650电池、40135电池或是铝箔软包电池均为二次电池,且它们在封装时可分为两种方式,分别是圈绕方式和堆栈方式。
如图1所示,圈绕方式是把两个分别在其表面10,20上涂布有正极材料11与负极材料21的铝箔1,2通过置于它们之间的隔离膜9重叠在一起,然后把它们圈绕成圆柱形形状或长方形形状或正方形形状来形成一圆柱状二次电池(18650电池、22650电池、40135电池等)或一铝箔软包二次电池。
如图2所示,堆栈方式是把多个分别在其表面10,20上涂布有正极材料11与负极材料21的铝箔1,2交替地通过置于它们之间的隔离膜9重叠在一起,从而形成一铝箔软包二次电池。
圈绕方式的优点是自动化生产速度快、体积比较小以及散热比较好,然而充放电电流很小。堆栈方式的优点是充放电电流大,然而自动化生产速度慢、体积比较大且散热比较差。
有鉴于此,本发明的发明人根据其从事该行业的多年经验,并本着精益求精的精神,积极研究改进,提出本发明的二次电池。
发明内容
根据本发明的一特征,提出一种二次电池,该二次电池包含:多个各在其表面上涂布有正极材料的铝箔,此些铝箔中的每一个通过胶带与相邻的铝箔连接,且在两相邻的铝箔之间保留有一预定间隙,该多个各在其表面上涂布有正极材料的铝箔中的每一个具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为该二次电池的正极;多个各在其表面上涂布有负极材料的铝箔,此些铝箔中的每一个通过胶带与相邻的铝箔连接,且在两相邻的铝箔之间保留有一预定间隙,该多个各在其表面上涂布有负极材料的铝箔中的每一个具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为该二次电池的负极,此些通过胶带连接在一起的表面上涂布有正极材料的铝箔与此些通过胶带连接在一起的表面上涂布有负极材料的铝箔通过置于它们之间的隔离膜重叠一起,且被圈绕成合适的形状;一用于密封地放置此些被圈绕成合适形状的铝箔的外壳;及注入到该外壳内的电解液。
根据本发明的另一特征,提出一种二次电池,该二次电池包含:一在其表面上涂布有正极材料的铝箔,该在其表面上涂布有正极材料的铝箔是在预定位置形成有多个沿着宽度方向延伸宽度的大概二分之一至四分之三的缺口,在每个缺口上贴有一胶带以避免该铝箔被拉扯时沿着缺口断开,在每个缺口的一侧具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为该二次电池的正极;一在其表面上涂布有负极材料的铝箔,该在其表面上涂布有负极材料的铝箔在预定位置形成有多个沿着宽度方向延伸宽度的大概二分之一至四分之三的缺口,在每个缺口上贴有一胶带以避免该铝箔被拉扯时沿着缺口断开,在每个缺口的一侧具有一电极耳,此些电极耳并联连接,以增加充放电电流,且共同作为该二次电池的负极,该在其表面上涂布有正极材料的铝箔与在其表面上涂布有负极材料的铝箔通过置于它们之间隔离膜重叠在一起,且被圈绕成合适的形状;一用于密封地放置此些被圈绕成合适形状的铝箔的外壳;及注入到该外壳内的电解液。
附图说明
图1是已知的以圈绕方式生产的二次电池中分别涂布有正极材料与负极材料的铝箔的示意图;
图2是已知的以堆栈方式生产的二次电池中分别涂布有正极材料与负极材料的铝箔的示意图;
图3是本发明的第一较佳实施例的一种同时具有以圈绕方式和堆栈方式生产优点的二次电池的分别涂布有正极材料与负极材料的铝箔的示意图;
图4是本发明的第二较佳实施例的一种同时具有以圈绕方式和堆栈方式生产优点的二次电池的分别涂布有正极材料与负极材料的铝箔的示意图;
图5是本发明一变化实施例的示意图;
图6和图7是本发明的另一变化实施例的示意图;
图8和图9是本发明的又另一变化实施例的示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明白,以下结合具体实施例,并参照附图,对本发明作进一步的详细说明。
如图3所示,是本发明的第一较佳实施例制作的一种同时具备圈绕与堆栈封装方式的二次电池的示意图。
如图3所示,提出多个通过切割一长形铝箔形成的在其表面10上涂布有正极材料11的铝箔1。该些铝箔1中的每一个通过胶带3与相邻的铝箔1连接,且在两相邻的铝箔1之间保留有一预定间隙。同样地,提出多个通过切割一长形铝箔形成的在其表面20上涂布有正极材料21的铝箔2。该些铝箔2中的每一个通过胶带3与相邻的铝箔2连接,且在两相邻的铝箔2之间保留有一预定间隙。接着,只要把此些连接在一起的铝箔1与此些连接在一起的铝箔2通过置于它们之间的隔离膜(见图1)重叠在一起,然后根据需求把它们圈绕成圆柱形形状或长方形形状并且密封地放进一圆柱形外壳或长方外壳并注入电解液,来形成一圆柱状二次电池(18650电池、22650电池、40135电池等)或一铝箔软包二次电池。如此形成的二次电池同时具有圈绕方式的优点和堆栈方式的优点,能够达成5C至20C充电及15C至60C放电的效果。
需要注意的是,该外壳不被限定为圆柱形形状,其可以具有任何合适的几何形状。同样的,铝箔软包也不被限定为长方形形状,其可以具有任何合适的几何形状。
如图4所示,是本发明的第二较佳实施例制作的一种同时具备圈绕与堆栈封装方式的二次电池的示意图。
如图4所示,一在其表面10上涂布有正极材料11的铝箔1是在预定位置形成有多个沿着宽度方向延伸宽度的大概二分之一至四分之三的缺口12。在每个缺口12上贴有一胶带3以避免该铝箔1被拉扯时沿着缺口12断开。另一方面,一在其表面20上涂布有负极材料21的铝箔2是在预定位置形成有多个沿着宽度方向延伸宽度的大概二分之一至四分之三的缺口22。在每个缺口22上贴有一胶带3以避免该铝箔2被拉扯时沿着缺口22断开。
接着,只要把该两铝箔1,2通过置于它们之间的隔离膜(见图1)重叠在一起,然后把它们圈绕成圆柱形形状或长方形形状并且密封地放进一圆柱形外壳或长方外壳并注入电解液,来形成一圆柱状二次电池(18650电池、22650电池、40135电池等)或一铝箔软包二次电池。如此形成的二次电池同时存在有圈绕方式的优点和堆栈方式的优点,能够达成5C至20C充电及15C至60C放电的效果。
需要注意的是,与图3的实施例相同,该外壳不被限定为圆柱形形状,其可以具有任何合适的几何形状。同样的,铝箔软包也不被限定为长方形形状,其可以具有任何合适的几何形状。
需要注意的是,在图3和图4中,与已知技术不同的是,由于每条铝箔1,2均有多个电极耳(电极接口金属片)13,23,以使多个正极互相并联连接,增加放电电流IT1=I1+I2+…..+In;另一方面以使多个负极互相并联连接,增加放电电流IT2=I1+I2+…..+Im。即增加充电速度,Iinput=I1=I2=…….=In,以及放电时收集电流的功能,即,Ioutput=I1+I2+…..+In。
如图5所示,是本发明一变化实施例的示意图。如图所示,在本发明的电池的正极电极耳13上可设置一温度控制开关4。该温度控制开关4可设定一个在0℃至300℃之间的设定值。当电池发生过充电或过放电而导致电池温度上升到达该设定值时,例如,120℃,该温度控制开关自动开路(open),切断电池与负载之间的回路,使电池输出电流/电压/功率降为零负载,从而保护电池免于高温爆炸燃烧。
如图6和图7所示,是本发明的另一变化实施例的示意图。如图6所示,提出一超级电容基板5。该超级电容基板5包括一基板50、一通过金属片54或以任何其他适合的方式与该电池的正极电极耳13(见图7)并联地电气连接的第一铜箔片51、一通过金属片54或以任何其他适合的方式与该电池的负极电极耳23(见图7)并联地电气连接的第二铜箔片52、及至少一个电气连接至该第一箔铜片51和该第二铜箔片52的电容53。在本实施例中,该电容基板5包括多个电容53。如图7所示,该超级电容基板5被置于圆筒型电池的中央,以保护电池免受回冲电流/电压造成电池损坏,且该电容基板5在负载运转上可以提高功率因子。
如图8和图9所示,是本发明又另一变化实施例的示意图。如图8所示,提出一个与图6和图7中所示的超级电容基板5相似的超级电容基板6。该超级电容基板6包括一基板60、一通过金属片64或以任何其他适合的方式与该电池的正极电极耳13(见图9)并联地电气连接的第一铜片61、一通过金属片64或以任何其他适合的方式与该电池的负极电极耳23(见图9)并联地电气连接的第二铜片62、及至少一个电气连接至该第一铜片61和该第二铜片62的电容63。在本实施例中,该电容基板6包括多个电容63。如图9所示,该超级电容基板6被置于方型电池的中央,以保护电池免受回冲电流/电压造成电池损坏,且该电容基板6在负载运转上可以提高功率因子。
以上所述的具体实施例,对本发明的目的、技术方案和有益效果进行了进一步详细说明,应理解的是,以上所述仅为本发明的具体实施例而已,并不用于限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (14)

1.一种二次电池,包括:
多个各在其表面上涂布有正极材料的铝箔,此些铝箔中的每一个通过胶带与相邻的铝箔连接,且在两相邻的铝箔之间保留有一预定间隙,所述多个各在其表面上涂布有正极材料的铝箔中的每一个具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为所述二次电池的正极;
多个各在其表面上涂布有负极材料的铝箔,此些铝箔中的每一个通过胶带与相邻的铝箔连接,且在两相邻的铝箔之间保留有一预定间隙,所述多个各在其表面上涂布有负极材料的铝箔中的每一个具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为该二次电池的负极,所述多个通过胶带连接在一起的表面上涂布有正极材料的铝箔与多个通过胶带连接在一起的表面上涂布有负极材料的铝箔通过置于它们之间的隔离膜重叠在一起,且被圈绕成合适的形状;
一用于密封地放置所述被圈绕成合适形状的铝箔的外壳;及
注入到所述外壳内的电解液。
2.如权利要求1所述的二次电池,其中,所述外壳包括圆柱形状。
3.如权利要求1所述的二次电池,其中,所述外壳包括长方形形状。
4.如权利要求1所述的二次电池,其中,所述外壳包括任何几何形状。
5.如权利要求1所述的二次电池,还包括一设置在所述正极的温度控制开关,该温度控制开关可设定一个在0℃至300℃之间的设定值,以当所述二次电池发生过充电或过放电而导致所述二次电池温度上升到所述设定值时,能够自行切断所述二次电池与负载之间的回路。
6.如权利要求1所述的二次电池,还包含一置于所述二次电池中央的超级电容基板,该超级电容基板包括一基板、一通过金属片或以任何其他适合的方式与所述二次电池的正极电极耳并联地电气连接的第一铜片、一通过金属片或以任何其他适合的方式与所述电池的负极电极耳并联地电气连接的第二铜片、及至少一个电气连接至所述第一铜片和第二铜片的电容,以保护电池免受回冲电流/电压造成电池损坏,且所述超级电容基板在负载运转上可以提高功率因子。
7.一种二次电池,包括:
一在其表面上涂布有正极材料的铝箔,该在其表面上涂布有正极材料的铝箔是在预定位置形成有多个沿着宽度方向延伸宽度的大概二分之一至四分之三的缺口,在每个缺口上贴有一胶带以避免所述铝箔被拉扯时沿着缺口断开,在每个缺口的一侧具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为所述二次电池的正极;
一在其表面上涂布有负极材料的铝箔,该在其表面上涂布有负极材料的铝箔是在预定位置形成有多个沿着宽度方向延伸宽度的大概二分之一至四分之三的缺口,在每个缺口上贴有一胶带以避免所述铝箔被拉扯时沿着缺口断开,在每个缺口的一侧具有一电极耳,此些电极耳并联连接以增加充放电电流,且共同作为所述二次电池的负极,所述在其表面上涂布有正极材料的铝箔与在其表面上涂布有负极材料的铝箔通过置于它们之间的隔离膜重叠在一起,且被圈绕成合适的形状;
一用于密封地放置所述被圈绕成合适形状的铝箔的外壳;及
注入到所述外壳内的电解液。
8.如权利要求7所述的二次电池,其中,所述外壳包括圆柱形状。
9.如权利要求7所述的二次电池,其中,所述外壳包括长方形形状。
10.如权利要求7所述的二次电池,其中,所述外壳包括任何几何形状。
11.如权利要求7所述的二次电池,还包含一设置在所述正极的温度控制开关,该温度控制开关可设定一个在0℃至300℃之间的设定值,以当所述二次电池发生过充电或过放电而导致所述二次电池温度上升到所述设定值时,能够自行切断所述二次电池与负载之间的回路。
12.如权利要求7所述的二次电池,还包含一置于所述二次电池中央的超级电容基板,该超级电容基板包括一基板、一通过金属片或以任何其他适合的方式与所述二次电池的正极电极耳并联地电气连接的第一铜片、一通过金属片或以任何其他适合的方式与所述电池之负极电极耳并联地电气连接的第二铜片、及至少一个电气连接至所述第一铜片和第二铜片的电容,以保护电池免受回冲电流/电压造成电池损坏,且所述超级电容基板在负载运转上可以提高功率因子。
13.如权利要求1所述的二次电池,其中,正极材料和负极材料包括由合适的金属氧化物混合酸性或碱性界面剂和醇类材料形成的液态、固态或半固态果冻状材料。
14.如权利要求7所述的二次电池,其中,正极材料和负极材料包括由合适的金属氧化物混合酸性或碱性界面剂和醇类材料形成的液态、固态或半固态果冻状材料。
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