Cover for battery case

A battery case and cover technology, applied in battery cover/end cover, secondary battery, battery pack components, etc., can solve problems such as cracking of safety valve 5, and achieve the effect of avoiding excessive stress concentration and reliable cracking

Active Publication Date: 2017-05-31
NISSHIN STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pressure inside the battery case 3 exceeds a predetermined value, the entire or most part of the annular thin-walled portion 50 is broken, thereby causing the safety valve 5 to crack.

Method used

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  • Cover for battery case
  • Cover for battery case
  • Cover for battery case

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] figure 1 It is a perspective view showing the lid body 1 for the battery case 3 according to Embodiment 1 of the present invention, figure 2 yes means figure 1 A top view of the cover body 1, image 3 is along figure 2 Cross-sectional view of line III-III. In addition, for the cover body used with the existing battery case (refer to Figure 6 as well as Figure 7 ) the same or equivalent parts are described using the same reference numerals. figure 1 The shown cover body 1 and the bottomed cylindrical shell main body 2 (refer to Figure 6 ) constitute together, for example, a battery case 3 (refer to Figure 6 ). The whole cover body 1 is comprised by the metal plate made from stainless steel.

[0025] The lid body 1 has a lid body body 4 , a safety valve 5 , and a protrusion 6 . Cover main body 4 such as figure 2 As shown, it is a substantially planar flat plate portion formed in a rectangular shape having a short side 40 and a long side 41 in plan view. ...

Embodiment approach 2

[0056] Figure 5 It is a plan view showing the lid body 1 for a battery case according to Embodiment 2 of the present invention. In Embodiment 1, although it was described that the center position 50a (center point) of the annular thin-walled portion 50 is arranged to coincide with the intersection point 6c of the two diagonal lines 6b connecting the opposite corners of the flat portion 61 (see figure 2 ), but in Embodiment 2, the intersection point 6c of the two diagonal lines 6b connecting the corners of the flat portion 61 of the annular thin-walled portion 50 is arranged inside the annular thin-walled portion 50 and connected to the annular thin-walled portion 50. The center position 50a of the portion 50 is not in the same position. Furthermore, the so-called inside of the annular thin portion 50 includes not only the inner side of the annular thin portion 50 but also the annular thin portion 50 itself. Other configurations are the same as those in Embodiment 1.

[00...

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PUM

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Abstract

In the structure in which the ring-shaped thin-walled portion (50) is integrally formed with the cover main body (4) by embossing, it is formed so as to protrude from the cover main body (4). An integral protruding part (6), and an annular thin-walled part (50) is provided on a flat part (61) of the protruding part (6).

Description

technical field [0001] The present invention relates to a cover body for a battery case which is composed of a metal plate constituting the battery case of a battery. Background technique [0002] Examples of lids for such battery cases that have been used so far include those described in Patent Document 1 and the like. Figure 6 It is an exploded perspective view showing a conventional battery case using a lid. In the figure, the cover body 1 and the bottomed cylindrical case main body 2 constitute a battery case 3 together. The cover body 1 and the case main body 2 are made of metal plates such as aluminum, aluminum alloy, nickel-plated steel plate, stainless steel or the like. A cover main body 4 and a safety valve 5 are provided in the cover 1 . The cover main body 4 is a rectangular planar portion having a short side 40 and a long side 41 in plan view. The safety valve 5 is used to release the pressure inside the battery case 3 to the outside by rupturing when the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12H01M2/04H01M50/159
CPCH01M50/3425H01M50/159Y02E60/10H01M10/0525
Inventor 大塚雅人
Owner NISSHIN STEEL CO LTD
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