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Cover for battery box

A technology of a battery box and a cover body is applied in the field of cover bodies for battery boxes, which can solve the problems of cracking of the safety valve 5 and achieve the effect of reliable cracking.

Active Publication Date: 2016-05-18
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 box 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 box
  • Cover for battery box
  • Cover for battery box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] figure 1 It is a perspective view showing the cover body 1 for the battery box 3 according to Embodiment 1 of the present invention, figure 2 yes means figure 1 A top view of the cover body 1. In addition, the same reference numerals are used for the conventional battery box cover (refer to Figure 8 as well as Figure 9 ) to describe the same or equivalent parts. figure 1 The shown cover body 1 and the bottomed cylindrical box main body 2 (refer to Figure 8 ) constitute together, for example, a battery case 3 for accommodating an electrolyte in a battery such as a lithium-ion battery (refer to Figure 8 ). The entire cover body 1 is made of a metal plate made of stainless steel.

[0028] The lid body 1 has a lid body body 4 , a safety valve 5 , and a pair of ribs 6 , 7 . Such as figure 2 As shown, the cover main body 4 is a substantially planar flat plate portion formed in a rectangular shape having short sides 40 and long sides 41 in plan view. A side wal...

Embodiment approach 2

[0064] Figure 5 It is a top view showing the battery box cover body 1 according to Embodiment 2 of the present invention. In Embodiment 1, it was explained that the intersection point 6c of the two line segments 6b connecting the ends of the ribs 6 and 7 is arranged so as to coincide with the center position 50a of the annular thin-walled portion 50 (see figure 2 ), however, in Embodiment 2, the annular thin-walled portion 50 is arranged so that the intersection point 6c of the line segment 6b is received in the inner peripheral region of the annular thin-walled portion 50, and the central position 50a of the annular thin-walled portion 50 offset. In addition, the inner peripheral region of the annular thin-walled portion 50 refers to a region including not only the inner side of the annular thin-walled portion 50 but also the annular thin-walled portion 50 itself. Other structures are the same as those in Embodiment 1.

[0065] Next, the function will be described. In c...

Embodiment approach 3

[0070] Figure 6 It is a top view showing the battery box cover 1 according to Embodiment 3 of the present invention. In Embodiments 1 and 2, the ribs 6 and 7 are provided so as to be completely along the short-dimension direction 4a of the cover main body 4, but as long as the respective ribs 6 and 7 extend along the short-dimension direction 4a as a whole, Can also be formed into other shapes, for example, as Figure 6 As shown, the longitudinal direction of each rib 6 , 7 may be formed to be inclined with respect to the short direction 4 a of the cover main body 4 .

[0071] In this way, even if the ribs 6, 7 are not provided completely along the short dimension direction 4a of the cover main body 4, as long as the ribs 6, 7 extend along the short dimension direction 4a as a whole, each rib can be The portions 6 and 7 have rigidity against deformation of the lid main body 4 when the internal pressure of the tank increases. As a result, since the deformation of the periph...

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PUM

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Abstract

In the present invention, in the structure in which the ring-shaped thin-walled part (50) is integrally formed with the cover main body (4) by embossing, it is formed with the cover main body (4) so ​​as to protrude from the cover main body (4). A pair of integral ribs (6, 7) extend along the short dimension direction (4a) of the cover main body (4), and the pair of ribs (6, 7) are arranged along the cover main body (4 ) on both sides of the annular thin-walled portion (50) in the longitudinal direction (4b).

Description

technical field [0001] The present invention relates to a battery box cover composed of a metal plate constituting the battery box of a battery, and more particularly to a new improvement in which a pair of The rib, or the annular thin portion provided between the short side of the cover main body and the rib can avoid excessive concentration of stress on a part of the annular thin portion, thereby enabling the safety valve to more reliably rupture. Background technique [0002] As such a lid body for a battery box conventionally used, for example, the structure shown in patent document 1 etc. can be mentioned. Figure 8 It is an exploded perspective view showing a battery box using a conventional lid. In the figure, the cover 1 constitutes a battery case 3 together with a bottomed cylindrical case body 2 . The lid body 1 and the box main body 2 are made of metal plates such as aluminum, aluminum alloy, nickel-plated steel plate, or stainless steel. A cover main body 4 and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/04H01M2/12H01M50/159
CPCH01M10/0525H01M50/169H01M50/325H01M50/159Y02E60/10H01M50/15H01M50/3425H01M50/30H01M50/147H01M10/04H01M2200/20
Inventor 大塚雅人
Owner NISSHIN STEEL CO LTD
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