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Secondary battery and method of manufacturing the same

A secondary battery and manufacturing method technology, applied in secondary battery manufacturing, secondary battery, electrolyte storage battery manufacturing and other directions, can solve problems such as poor bonding and welding defects, and achieve the effect of suppressing defects

Active Publication Date: 2012-08-01
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the metal cap for sealing is placed in the state where the electrolyte is attached to the liquid injection port and soldered, welding defects will occur due to the influence of the electrolyte or solvent contained in the electrolyte
In addition, even if soldering is performed after removing the electrolyte by suction or wiping, there will be a certain proportion of defective joints that can be considered to be caused by the electrolyte.

Method used

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  • Secondary battery and method of manufacturing the same
  • Secondary battery and method of manufacturing the same
  • Secondary battery and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] One embodiment will be described with reference to the drawings.

[0021] like figure 1 As shown, the secondary battery 1 of the present embodiment includes: an electrode body 2 ; a container 3 for accommodating the electrode body 2 and an electrolytic solution; and a pair of positive terminal 4 and negative terminal 5 . As this secondary battery 1, nonaqueous electrolyte secondary batteries, such as a lithium ion battery, are mentioned, for example.

[0022] The electrode body 2 is formed by winding a positive electrode plate and a negative electrode plate serving as a power generating element in a spiral shape with a separator interposed therebetween, and is housed in a container 3 together with an electrolytic solution.

[0023] The container 3 is a flat rectangular parallelepiped outer container formed of metal such as aluminum or an aluminum alloy, for example. The container 3 has an upper end ( figure 1 Middle) a container body 3a with an open end and a rectang...

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PUM

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Abstract

A secondary battery (1) according to an embodiment includes a container (3) having a pouring hole (7) through which an electrolyte is poured, and housing the electrolyte, poured through the pouring hole (7), together with an electrode body (2); and a sealing lid (9) fixed to the container (3) and closing the pouring hole (7). The container (3) has a plurality of grooves (8) extending in parallel along the outer edge of the pouring hole (7), in a predetermined region that surrounds the periphery of the pouring hole (7), and the sealing lid (9) is provided on the plurality of grooves (8) in such a manner as to close the pouring hole (7) and is fixed to the container (3).

Description

technical field [0001] Embodiments of the present invention relate to a secondary battery and a method for manufacturing the secondary battery. Background technique [0002] In recent years, among secondary batteries represented by lithium-ion batteries, various applications centered on automotive applications have been expanding, and production has been expanding. When manufacturing a secondary battery, a manufacturing method of enclosing the components of the battery in a metal case is often used. In addition, in order to improve the space efficiency of secondary batteries, square battery boxes are often used instead of conventional circular boxes. Laser welding, which can efficiently manufacture structures, is often used in the manufacture of lithium-ion batteries, regardless of whether it is a circular or square battery case. [0003] Among the manufacturing processes of lithium-ion batteries, the following three processes are frequently used for laser welding. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36H01M10/04H01M50/627H01M50/636
CPCY02E60/12B23K26/206H01M2/0426H01M2/0217B23K26/246H01M10/0525H01M10/058H01M2/36H01M2/365B23K26/28B23K26/36B23K26/244Y10T29/4911Y10T29/49108Y02E60/10H01M50/103H01M50/169H01M50/636Y02P70/50H01M50/627
Inventor 川田义高丰田夏树冈田直忠矢作进
Owner KK TOSHIBA