密封电池

Hermetically sealed battery

Abstract

在具备兼作端子板的密封件的密封电池中,良好地确保引线相对密封件的焊接强度,并且没有飞溅等的发生就能将密封件可靠地焊接在电池盒上。密封件(17)包括配置于电池盒(6)侧的由铝或铝合金构成的铝层(25)、和形成于铝层(25)上并由热导率比铝层(25)还小的镍等形成的镍层(26)。铝层(25)形成为比镍层(26)还大,铝层(25)的外周缘部(25a)比镍层(26)的外周缘(26a)还向外侧突出。密封件(17)以激光(27)的中心轴(S)沿着铝层(25)的外周缘(25b),并且由激光(27)的照射引起的焊接痕迹(29)的镍层(26)侧的边缘(29a)比镍层(26)的外周缘(26a)还位于外侧的状态,焊接在电池盒(6)上。
To provide a hermetically sealed battery having a seal that also serves as a terminal plate, in which the seal can be reliably welded to a battery case without causing spatters and the like while ensuring good weld strength of a lead to the seal. A seal 17 is constituted by an aluminum layer 25 that is made of aluminum or the like and is disposed on a battery case 6 side and a dissimilar metal layer 26 having less thermal conductivity than the aluminum layer 25 and is formed on the aluminum layer 25. The aluminum layer 25 has a larger size than the dissimilar metal layer 26, and an outer peripheral edge portion 25a of the aluminum layer 25 protrudes outward beyond an outer peripheral edge 26a of the dissimilar metal layer 26. The seal 17 is welded to the battery case 6 in a state where the central axis S of a laser beam 27 moves along an outer peripheral edge 25b of the aluminum layer 25 and an edge 29a of a welding mark 29 due to irradiation with the laser beam 27 on the dissimilar metal layer 26 side is positioned outside the outer peripheral edge 26a of the dissimilar metal layer 26.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)

    Title

Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-102544424-AJuly 04, 2012株式会社杰士汤浅国际电池
    CN-102544424-BAugust 10, 2016株式会社杰士汤浅国际电池