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Sealed Cell and method for manufacturing same

A manufacturing method and airtight technology, which is applied to battery pack parts, circuits, electrical components, etc., can solve the problems of increased battery capacity, poor production efficiency, and increased volume of the sealing body, achieving excellent electrical conductivity and improving current extraction efficiency effect

Inactive Publication Date: 2014-01-08
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the technology of Patent Document 1, the production of the sealing body requires steps such as formation of pin-shaped protrusions and counterbores, alignment of pin-shaped protrusions and counterbores, riveting and fixing with rivets, and welding, and there is a problem of poor production efficiency.
[0008] In addition, Patent Documents 2 to 4 propose techniques for securing electrical conduction by welding each part of the sealing body, but it is necessary to have a part for riveting the parts or to prepare other parts for welding, so that the volume of the sealing body increases, The increase in man-hours hinders the improvement of productivity and the increase of battery capacity

Method used

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  • Sealed Cell and method for manufacturing same
  • Sealed Cell and method for manufacturing same
  • Sealed Cell and method for manufacturing same

Examples

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Embodiment approach 1

[0040] A mode for implementing the present invention will be described in detail using an example applied to a lithium ion secondary battery based on the drawings. figure 1 It is an enlarged cross-sectional view of a main part of a sealed battery according to this embodiment, figure 2 It is a figure which shows the sealing body used for the sealed battery which concerns on this invention.

[0041] Such as figure 1 As shown, in the sealed battery according to the present embodiment, the sealing member 10 is disposed at the opening of the outer can 20 containing the electrode body 40 and the non-aqueous electrolyte via the insulating gasket 30 , and is fixed by caulking.

[0042] Additionally, if figure 1 , 2As shown, the sealing body 10 used for the sealed battery according to this embodiment includes: a terminal plate 1 electrically connected to the positive electrode or the negative electrode through the electrode sheet 8; a terminal cover 5 having an external terminal...

Embodiment 1

[0075] A battery according to Example 1 having a height of 65 mm and a diameter of 18 mm was produced in the same manner as in the above-mentioned embodiment.

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PUM

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Abstract

An object of the present invention is to manufacture a sealed cell having a highly conductive sealing body with a safety valve at high productivity. In order to accomplish above object, the present invention espouses a method of manufacturing a sealed cell including: preparing a terminal cap and a safety valve, the terminal cap including an external terminal projecting toward the outside of the cell, and a flange, and the safety valve including a conductive contact portion projecting toward the inside of the cell, and a peripheral portion and having an outer periphery bent toward the outside of the cell so as to form a bent portion; temporarily fixing the safety valve and the terminal cap together at the bent portion after coupling the safety valve and the terminal cap to each other; and conductively adhering the flange and the peripheral portion to each other near the bent portion.

Description

technical field [0001] The present invention relates to a sealed battery, and more specifically, to a sealed battery including a sealing body with a safety valve. Background technique [0002] Nonaqueous electrolyte secondary batteries have high energy density and high capacity, and therefore are widely used as drive power sources for portable devices, electric tools, and the like. [0003] A non-aqueous electrolyte secondary battery uses a flammable organic solvent, and therefore, it is required to ensure the safety of the battery. Therefore, a current interruption mechanism that operates when the internal pressure of the battery rises is incorporated in a sealing body for sealing the battery (for example, refer to Patent Document 1). [0004] use Figure 4 The technique related to Patent Document 1 will be described. Figure 4 It is a partially enlarged cross-sectional view showing a sealed battery according to Patent Document 1. FIG. Such as Figure 4 As shown, in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M2/02H01M2/04H01M2/26H01M50/171
CPCY02E60/12H01M2/0225H01M2/1241H01M2/263H01M2/1235H01M2/046H01M2/0413H01M50/56H01M50/171H01M50/152H01M50/3425Y10T29/4911Y02E60/10H01M50/342
Inventor 大和贤治山下修一山口勇马
Owner SANYO ELECTRIC CO LTD