CN113474950B - 用于可拆卸地接触电池单元的装置 - Google Patents

用于可拆卸地接触电池单元的装置 Download PDF

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CN113474950B
CN113474950B CN202080015184.2A CN202080015184A CN113474950B CN 113474950 B CN113474950 B CN 113474950B CN 202080015184 A CN202080015184 A CN 202080015184A CN 113474950 B CN113474950 B CN 113474950B
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G.瓦尔德舒茨
W.施穆德梅尔
F.德雷克斯勒
P.多布施
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Abstract

在此描述了一种用于将电池单元(4)与反向于连接方向(2)敞开的单元容纳部可拆卸地相接触的装置，所述单元容纳部由接触弹簧底座(1)限定边界，用于在外壳侧围绕电池单元(4)的接触舌片(3)反向于连接方向(2)地从所述接触弹簧底座突伸出。为了提供一种用于可拆卸地接触电池单元(4)的装置，即使在周期性的机械负荷下，该装置也能够与所安装的电池单元的相对位置无关地并且尽可能与电池单元的直径无关地实现可靠的电连接，而不使组装过程变难，在此建议，所述接触舌片(3)具有沿径向突出到单元容纳部中的切割的卵形形式的接触体(5)。

Description

用于可拆卸地接触电池单元的装置
技术领域
本发明涉及一种用于将电池单元与反向于连接方向敞开的单元容纳部可拆卸地相接触的装置，所述单元容纳部由接触弹簧底座限定边界，用于在外壳侧围绕电池单元的接触舌片反向于连接方向地从所述接触弹簧底座突伸出。
背景技术
由文献EP 3096372 A1已知一种用于将两个电池单元串联接触的接触弹簧。接触弹簧具有接触舌片，这些接触舌片包围第一电池单元并且将该第一电池单元与第二电池单元材料接合地连接。尤其对于大的、设计不均匀的电池单元或在接触弹簧中安装不良的电池单元，接触舌片不能对电池单元的外壳施加足够大的夹紧力，这就是为什么在动态的机械负荷下无法确保具有大直径的高容量电池单元、例如21700型圆形电池单元的足够可靠的接触。此外缺点是，由于接触舌片的尖棱设计，当电池单元插入由接触舌片界定的单元容纳部中时并且在电池单元在正好该单元容纳部中的可能的相对移动的情况下，导致电池单元外壳和/或接触舌片自身的可能存在的防氧化涂层的逐渐损坏。此外，由于接触舌片和电池单元外壳之间的变化的接触面产生可变的接触电阻，这导致不利的电气运行条件。因此，通常优选在接触弹簧和电池单元之间的材料接合的连接。
因此，为了即使在接触位置只能困难地接近的情况下也实现材料接合的连接，(US6120564、EP 2087554 A1、EP 2048723 A1、JP 2003077453 A)已经建议在接触弹簧上设置焊接点，当施加相应高的电流时，这些焊接点能够实现材料接合的连接。然而，可理解地不利的是，除了组装上的限制和损坏的电池单元缺乏可更换性之外，在焊接时出现的电流和温度可能导致电池单元的损坏。
发明内容
因此，本发明所要解决的技术问题是，建议一种用于可拆卸地接触电池单元的装置，即使在周期性的机械负荷下，所述装置也能够与所安装的电池单元的相对位置无关地并且尽可能与电池单元的直径无关地实现可靠的电连接，而不使组装过程变难。
所述技术问题按照本发明如此解决，即，所述接触舌片具有沿径向突出到单元容纳部中的切割的卵形形式的接触体。与由现有技术已知的根据相对位置具有与被开口围绕的电池单元的不确定的接触面的接触弹簧不同地，通过按照本发明规定的切割的卵形、优选半球形的接触体预先提供在接触舌片和外壳之间的接触面，从而在接触体或接触舌片和电池单元之间产生确定的接触电阻。即使装置由于振动而产生周期性的机械变形，该接触电阻也很大程度上是恒定的。此外由于接触体的倒圆的表面，还可以避免表面损伤，特别是因为接触体将尖棱的接触舌片与电池单元的相应的外壳表面分开。
所述接触体从所述接触舌片被挤压出，由此产生改善的电接触和同时简单的制造条件。因此，接触体可以在一个工作步骤中制造，其中，用于避免表面损伤的倒圆的表面可以在不进行单独的再加工的情况下实现。为了减小电污秽引起的电阻，接触体可以配设有防氧化的涂层。这样的涂层在本发明的特别有利的设计方案中通过如下方式制造，即在接触体被挤压出之前，接触舌片就已经配设有对于本领域技术人员来说足够的涂层厚度，从而在变形之后突出到单元容纳部中的接触体表面具有完整的防氧化涂层。可以使用例如镍或金作为氧化保护用的涂层以降低电污秽引起的电阻。
为了即使对于在电池单元底部进行脱气的电池单元也能够使用按照本发明的装置并且为了同时改善电池单元在单元容纳部中的可靠的安装，在此建议，所述接触弹簧底座的边缘上弯成立缝(Stehfalz)，所述接触舌片与所述立缝相连接。所述立缝围绕电池单元外壳的端部区段，从而防止从电池单元的底侧流出的气体在接触舌片之间侧向流出并且可以将该气体导引至为此设置的脱气通道，该脱气通道与接触弹簧底座中的为此设置的开口相连。同时，立缝加固了接触弹簧底座和连接在其上的接触舌片，从而尽管可能的用于排出从电池单元流出的热气体的开口，但还是可以提高接触舌片的作用在电池单元外壳上的夹紧力。因此还提高了电导性，该电导性与由接触体传递的法向接触力成比例地增大。用于排出从电池单元流出的热气体的开口也可以例如由与接触弹簧底座相连的、回形曲折的或螺旋形的连接导体形成，该连接导体能够实现与另外的电池单元的串联连接。
为了即使在由接触舌片施加的夹紧力较大的情况下也能够实现将电池单元温和地插入所述装置中，在按照本发明的装置的特别有用的设计方案中适宜的是，所述接触舌片背向于单元容纳部凸状地弯曲，其中，所述接触体分别布置在曲线顶点的区域中。由于这些措施可以实现由接触舌片产生的夹紧力的特别有效率的传递，因为作用在电池单元外壳上的法向接触力被最大化并且收缩阻力(Engewiderstand)被最小化。尽管通过按照本发明的弯曲提高了接触舌片的刚度，但通过被接触舌片包围的单元容纳部的在顶点之后反向于连接方向扩宽的横截面使电池单元的插入过程变得容易。
附图说明
在附图中示例性地示出本发明的技术方案。在附图中：
图1示出根据本发明的装置的侧视图，所述装置将两个电池单元彼此电连接；和
图2示出根据本发明的装置的实施例的放大的立体图。
具体实施方式
根据本发明的装置具有接触弹簧底座1，所述接触弹簧底座具有从接触弹簧底座1反向于连接方向2突伸出的接触舌片3。为了包围图1中示出的第一电池单元4并且将其电连接，接触舌片3布置在接触弹簧底座1的周侧上并且因此形成逆着连接方向2敞开的单元容纳部。第一电池单元4通过接触舌片3与所述装置可拆卸地连接，由此一方面在周期性的机械运行条件下获得通过电池单元4相对于单元容纳部的相对移动能够实现的公差补偿，并且另一方面在将电池单元4插入单元容纳部中时，组装过程变得容易。为了尽管是可拆卸的连接但还是确保运行可靠且均匀的接触，接触舌片3如优选图2可见的那样在电池外壳侧具有设计为卵形的接触体5，这些接触体布置在接触舌片3的曲线顶点的区域中。通过该特殊的几何形状实现在所有接触舌片3上的近似一致的接触面，而不管电池单元4相对于单元容纳部的相对位置如何。由于卵形的接触体5通过压力成型工艺、例如通过压印产生，可以防止对可能的预制涂层的损坏，从而明显延长了电池4的寿命周期。
如果该装置用于将两个电池单元4、6串联接触，则可以从接触弹簧底座1弹起回形曲折的连接导体7，该连接导体具有在周向侧包围电池单元6的电极8的电极容纳部9，以便实现与第二电池单元6的材料接合的连接。由于连接导体7的尤其在图2中可见的回形曲折的构造，可以沿着和逆着连接方向2实现机械的公差补偿，其中，连接导体7的较窄的接片同时用作过流情况下的熔断器。
如果接触舌片3具有逆着连接方向2的倒圆的收窄部和朝着单元容纳部相对于电池单元4凸形的弯曲，从而尤其是接触弹簧底座1的边缘向上弯曲成立缝10，则即使对于尺寸较大的电池单元也能产生用于可靠地接触的足够高的夹紧力，由此产生特别温和的连接条件。立缝10有利地形状配合地与电池单元4连接，从而可以防止可能的从电池单元4的底侧逸出的脱气流从侧面逸出。为了还能在电池单元6的电极8和电极容纳部9之间实现尽可能过程可靠的材料接合的连接，电极容纳部9具有布置在周向侧的校准翼片11，这些校准翼片可以用作例如烙铁(Schweiβkolben)的止挡面，以便进行调整。

Claims (3)

1.一种用于将电池单元(4)与反向于连接方向(2)敞开的单元容纳部可拆卸地相接触的装置，所述单元容纳部由接触弹簧底座(1)限定边界，用于在外壳侧围绕电池单元(4)的接触舌片(3)反向于连接方向(2)地从所述接触弹簧底座突伸出，其特征在于，所述接触舌片(3)具有沿径向突出到单元容纳部中的切割的卵形形式的接触体(5)，其中，所述接触舌片(3)背向于单元容纳部凸状地弯曲，其中，所述接触体(5)分别布置在曲线顶点的区域中。
2.根据权利要求1所述的装置，其特征在于，所述接触体(5)从所述接触舌片(3)被挤压出。
3.根据权利要求1或2中任一项所述的装置，其特征在于，所述接触弹簧底座(1)的边缘上弯成立缝(10)，所述接触舌片(3)与所述立缝相连接。
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