CN1799154A - 蓄电池及用于产生密封的接触端子穿通的方法 - Google Patents

蓄电池及用于产生密封的接触端子穿通的方法 Download PDF

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CN1799154A
CN1799154A CNA2004800153660A CN200480015366A CN1799154A CN 1799154 A CN1799154 A CN 1799154A CN A2004800153660 A CNA2004800153660 A CN A2004800153660A CN 200480015366 A CN200480015366 A CN 200480015366A CN 1799154 A CN1799154 A CN 1799154A
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housing wall
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迪特尔·贝克托尔德
凯·佩尔茨
拉尔夫·约斯韦格
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Kraise Technology And Recycling Co ltd
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Abstract

本发明提出了一种蓄电池(1)，它具有在一个壳体(2)中的至少一个电池室(8a，8b)及具有一些接触元件(3，7)，这些接触元件与至少一个电池室(8a，8b)电连接并穿过壳体壁(4，9)，其中这些接触元件(3，7)分别由塑料密封件(5)挤压包封，并且这些塑料密封件(5)各具有一个平面地靠触在壳体壁(4，9)上的支承面，作为第一焊接部件的支承面与作为第二焊接部件的、与该支承面邻接的壳体壁(4，9)以支承面与壳体壁(4，9)之间的接触面上的一个环绕接触元件(3，7)的焊缝被透射光式激光焊接，这两个焊接部件中的一个焊接部件对于激光束至少部分地透明，而另一个焊接部件是吸收激光的，使得一个焊接部件在激光束透射相邻的另一个焊接部件并且在该一个焊接部件上被吸收时可与壳体壁(4，9)相焊接。

Description

蓄电池及用于产生密封的接触端子穿通的方法
本发明涉及一种蓄电池，它具有在一个壳体中的至少一个电池室及具有一些接触元件，这些接触元件与至少一个电池室电连接并穿过壳体壁，其中这些接触元件分别由塑料密封件挤压包封，并且这些塑料密封件各具有一个平面地靠触在壳体壁上的支承面。
本发明还涉及用于在蓄电池上产生密封的接触端子穿通的方法，其中这些接触端子与至少一个电池室电连接并穿过壳体壁。
由DE 2833416B1及EP0105416B1公开了一些用于蓄电池的、对气体及液体密封的电极密封装置，其中用于电池室的触点接通的电极栓柱由热塑性塑料构成的体挤压包封。该体与蓄电池的壳体盖形成接触并用反射焊接方法焊接，由此在该体与盖之间的外缝上形成一个环形的焊接边缘。也提出了使用超声波焊接方法或摩擦焊接方法来取代反射焊接方法。
这种电极密封装置适合于铅蓄电池，而由于所使用的材料(例如镍、铝、铜、钢)则不适合于镍金属氢化物(NiMH)电池及锂离子电池。
因此本发明的任务是提出一种改善的蓄电池、尤其是镍金属氢化物电池或锂离子电池，它具有在一个壳体中的至少一个电池室且具有一些接触元件，其中这些接触元件穿过壳体壁。
根据本发明，该任务由所述类型的蓄电池这样来解决：作为第一焊接部件的支承面与作为第二焊接部件的、与该支承面邻接的壳体壁以支承面与壳体壁之间的接触面上的一个环绕接触元件的焊缝被透射光式激光焊接，及这两个焊接部件中的一个焊接部件对于激光束至少部分地透明，而另一个焊接部件是吸收激光的，使得一个焊接部件在激光束透射相邻的另一个焊接部件并且在该一个焊接部件上被吸收时可使支承面与壳体壁相焊接。
借助基本上例如由DE 19916786A1公开的、用于连接由对激光透明的或吸收激光的塑料构成的固定的管和/或壁部件的透射光式激光焊接方法可以作到：以最小可能的热量输入在塑料密封件与壳体壁之间无接触式地、无磨损地进行连接。该透射光式激光焊接方法仅需要短的工艺时间且因此相对地快速。此外，工具成本低且透射光式激光焊接方法在制造上提供了高的灵活性。
此外，塑料密封件的支承面与壳体壁的焊接以支承面与壳体壁之间的接触面上的焊缝来替代在传统的反射焊接中在外边缘上产生的焊缝，这具有其优点，即不需要无用空间且塑料密封件与壳体壁的该焊接出于制造技术的原因通过透射光式激光焊接方法就可实现。
有利的是，接触元件具有一些在其圆周上的环形的突出部分，并且塑料密封件完全包围这些突出部分。以此方式，与平整的接触元件的挤压包封相比实现了对气体及液体密封的改善。对此变换地或附加地，接触元件也可具有一些在其圆周上的环形的凹入部分，其中当塑料密封件在接触元件周围在突出部分和/或凹入部分的区域中被注射成型后，该塑料密封件完全填充这些凹入部分。
为了改善吸收特性，塑料密封件的支承面和/或在所对应的支承面的区域中的壳体壁优选具有一些助熔剂或填充材料。对此变换地或附加地，也可在支承面和/或壳体壁的与支承面紧邻的表面上设置有用于改善吸收特性的、吸收激光的颜料层。
当透射所述对激光透明的壳体壁时，激光在塑料密封件的吸收激光的支承面上被吸收及必要时部分地被反射，使得接触面被加热并与相邻的壳体壁相熔接。
但激光束的吸收也可在壳体壁相对塑料密封件的界面上实现，由此使壳体壁的整个面被加热。
特别有利的是，塑料密封件具有一些用于接收壳体壁的槽。塑料密封件则可在壳体壁的通口的区域中通过这些槽对液体密封地被夹紧在壳体壁上。该实施形式尤其适于电池室连接器，后者从一个电池室穿过隔板通到相邻的电池室。在此情况下，槽与壳体壁的焊接不是绝对必需的。因此，这些槽可有利地被用于在制造时对于透射光式激光焊接方法不能达到的区域。
这些接触元件优选是一些电极栓柱，它们穿过壳体盖通向外部；或是一些电池室连接器，它们为了连接相邻的电池室而穿过电池壳体的隔板。
本发明的任务还在于，提出一种改进的、在上述蓄电池上产生密封的接触端子穿通的方法。
该任务用以下步骤来解决：
-由塑料密封件挤压包封接触端子，其中塑料密封件具有一个可平面地靠触在壳体壁上的支承面，
-将塑料密封件的支承面靠置在壳体壁上，
-通过透射光式激光焊接用激光束将支承面焊接在紧邻的壳体壁上，该激光束透过至少部分地透明的壳体壁照射到这样地吸收的支承面上，使得该支承面与相邻的壳体壁相焊接，其中焊缝环绕接触元件及位于支承面与壳体壁之间的接触面上。
因此，根据本发明在一个传统的由塑料密封件挤压包封的接触端子穿通结构中，靠触在壳体壁上的塑料密封件用透射光式激光焊接方法焊接。在此情况下，激光透过至少部分地透明的壳体壁到达吸收激光的支承面上。通过吸收及必要时部分地反射激光而使支承面加热，由此使支承面与相邻的壳体壁在该支承面与该壳体壁之间的接触面上相焊接。
为了改善吸收特性，在接触端子的挤压包封前可在塑料材料中加入一些助熔剂或填充材料。但也可以是，在支承面上和/或在壳体壁的被设置用于靠触在支承面上的表面上施加吸收激光的颜料层，以改善吸收特性。
首先为了液体密封地将接触端子穿通结构安装到对于该透射光式激光焊接方法不能达到的位置上的壳体壁上，有利的是，在塑料密封件中开设一些槽并借助这些槽将塑料密封件夹紧在壳体壁上。于是在这些槽的区域中不再绝对必需又一焊接。
以下将借助附图举例说明本发明。附图表示：
图1具有塑料壳体及由该塑料壳体伸出的电极栓柱的蓄电池的一个透视图；
图2 图1中蓄电池的一部分的剖切图。
由图1可看到一个具有一个由塑料构成的、对液体及气体密封的壳体2的蓄电池1，一些用于蓄电池1的电连接的电极栓柱3a、3b穿过该壳体。这些电极栓柱3a、3b穿过塑料壳体2的壳体盖4并从该壳体盖伸出。它们由塑料密封件5挤压包封(umspritzen)，塑料密封件5部分地穿过壳体盖4中的孔通向外部。
根据本发明，这些塑料密封件5用透射光式激光焊接方法被焊接在壳体盖4上，其方式是，激光束通过至少局部地对于激光透明的壳体盖4被导入，该激光束照射在塑料密封件5的、靠触在壳体盖4上的支承面上。塑料密封件5的该支承面可吸收激光，由此产生热量，该热量使塑料密封件5的支承面熔化并与壳体盖4相焊接。以此方式产生的焊缝6位于塑料密封件5的支承面与壳体盖4之间的接触面上且无缝隙地围绕电极栓柱3a或3b延伸。为了产生该焊缝6，例如借助一个夹持装置使壳体盖4压在塑料密封件5上，使得在透射光式激光焊接期间保证支承面与壳体盖4之间的接触。
为了保证接触面的足够的吸收作用，塑料密封件5尤其在支承面上具有相应的助熔剂或填充材料。但也可考虑，通过涂颜料尤其以一个吸收激光的颜料层来提高塑料密封件5的支承面与壳体壁、例如壳体盖4的壳体壁之间的接触面的吸收特性及必要时的反射特性。
由图2可看到图1中蓄电池1的一部分的剖切图。可明显地看到，塑料密封件5对液体及气体密封地被注射成型(gespritzt)在电极栓柱3的周围。这里在电极栓柱3的圆周上设置有一些环形的槽形式的凹入部分，它们被塑料密封件5完全填充。塑料密封件5具有一个带有支承面的法兰，该支承面平面地靠触在壳体盖4的内侧面上。在法兰的区域中，塑料密封件5借助透射光式激光焊接方法通过无缝隙环形的焊缝6与壳体盖4相连接。以此方式保证电极栓柱3对液体及气体密封地穿过壳体盖4。
此外可看到，设置有一个电池室连接器7，用于将左电池室8a与右电池室8b电连接。该电池室连接器7穿过隔板9，该隔板具有一个用于电池室连接器7的通口。电池室连接器7由塑料密封件5挤压包封，其中也设置有一些附加的凹入部分或槽，它们被塑料密封件5完全地填充。
在塑料密封件5的侧边缘上及下边缘上设置有一个槽10，以便使塑料密封件5对液体密封地夹紧在隔板9上。于是在槽10的区域中不再需要附加的焊接。塑料密封件5仅在朝壳体盖4的支承面上借助透射光式激光焊接方法来焊接。
电池室连接器7可为单件式或多件式的。这些电池室连接器7的触点接通可用可拆卸的或刚性固定的方法以公知方式来实现，例如通过螺钉、铆接、焊接、钳接，压接或咬接(Durchsetzfügen)。
此外，在壳体盖4中以公知方式设置有一些填充孔11及阀孔12。并且这些填充孔及阀孔11、12也可有利地用透射光进行激光焊接。

Claims (11)

1.蓄电池(1)，具有在一个壳体(2)中的至少一个电池室(8a，8b)及具有一些接触元件(3，7)，这些接触元件与至少一个电池室(8a，8b)电连接并穿过壳体壁(4，9)，其中这些接触元件(3，7)分别由塑料密封件(5)挤压包封，并且这些塑料密封件(5)各具有一个平面地靠触在壳体壁(4，9)上的支承面，其特征在于：作为第一焊接部件的支承面与作为第二焊接部件的、与该支承面邻接的壳体壁(4，9)以支承面与壳体壁(4，9)之间的接触面上的一个环绕接触元件(3，7)的焊缝被透射光式激光焊接；这两个焊接部件中的一个焊接部件对于激光束至少部分地透明，而另一个焊接部件是吸收激光的，使得支承面在激光束透射相邻的另一个焊接部件并且在该支撑面上被吸收时可与壳体壁(4，9)相焊接。
2.根据权利要求1的蓄电池(1)，其特征在于：这些接触元件(3，7)具有一些在它们的圆周上的环形的突出部分，并且塑料密封件(5)完全包围这些突出部分。
3.根据权利要求1或2的蓄电池(1)，其特征在于：这些接触元件(3，7)具有一些在它们的圆周上的环形的凹入部分，并且塑料密封件(5)完全填充这些凹入部分。
4.根据以上权利要求中一项的蓄电池(1)，其特征在于：塑料密封件(5)的支承面和/或在所对应的支承面的区域中的壳体壁(4，9)具有一些助熔剂或填充材料，用于改善吸收特性。
5.根据以上权利要求中一项的蓄电池(1)，其特征在于：支承面和/或壳体壁(4，9)的与支承面紧邻的表面具有用于改善吸收特性的、吸收激光的颜料层。
6.根据以上权利要求中一项的蓄电池(1)，其特征在于：这些接触元件(3，7)具有一些用于接收壳体壁(4，9)的槽，这些接触元件(3，7)在壳体壁(4，9)的相应的通口的区域中通过这些槽对液体密封地被夹紧在壳体壁(4，9)上。
7.根据以上权利要求中一项的蓄电池(1)，其特征在于：这些接触元件(3，7)是一些电极栓柱(3)或一些电池室连接器(7)。
8.用于在蓄电池(1)上产生密封的接触端子穿通的方法，其中接触元件(3，7)与至少一个电池室(8a，8b)电连接并穿过壳体壁(4，9)，该方法具有以下步骤：
-由塑料密封件(5)挤压包封接触端子(3，7)，其中塑料密封件(5)具有一个可平面地靠触在壳体壁(4，9)上的支承面，
-将塑料密封件(5)的支承面靠置在壳体壁(4，9)上，
-通过透射光式激光焊接用激光束将支承面焊接在紧邻的壳体壁(4，9)上，该激光束透过至少部分地透明的壳体壁(4，9)照射到这样地反射的支承面上，使得该支承面与相邻的壳体壁(4，9)相焊接，其中焊缝环绕接触元件(3，7)及位于支承面与壳体壁(4，9)之间的接触面上。
9.根据权利要求8的方法，其特征在于：在用于塑料密封件(5)的塑料材料中加入一些助熔剂或填充材料，以改善吸收特性。
10.根据权利要求8或9的方法，其特征在于：在支承面上和/或在壳体壁(4，9)的被设置用于靠触在支承面上的表面上施加吸收激光的颜料层，以改善吸收特性。
11.根据权利要求8至10中一项的方法，其特征在于：在塑料密封件(5)中开设一些槽，用于接收壳体壁(4，9)，及在壳体壁(4，9)的一个通口的区域中借助这些槽对液体密封地将塑料密封件(5)夹紧在壳体壁(4，9)上。
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DE10326906A1 (de) 2005-01-05
WO2004114436A3 (de) 2005-07-21
JP2006527468A (ja) 2006-11-30
EP1634344B1 (de) 2008-06-04
EP1634344A2 (de) 2006-03-15
DE10326906B4 (de) 2008-09-11

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