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Sealed battery

A technology for sealing batteries and electrolytes, which is applied to sealing materials, battery pack components, battery covers/end covers, etc., which can solve problems such as poor welding and liquid leakage, and achieve the effect of improving sealing and preventing liquid leakage

Inactive Publication Date: 2011-04-20
HITACHI MAXELL ENERGY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, if the sealing plug floats in the installed state, the sealing plug will be eccentric in the recess and the axis will be shifted. As a result, welding failure will occur at the contact part or gap between the recess and the sealing plug, and there is a risk of liquid leakage.

Method used

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Examples

Experimental program
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Embodiment Construction

[0022] Figure 1 to Figure 5 An example in which the sealed battery of the present invention is applied to a dry battery constituting a battery portion is shown. exist figure 2 Among them, the plain battery 1 uses a flat cylindrical outer can 2 with an open upper surface as a base, houses an electrode body 3 and an electrolytic solution inside, and uses a plastic insulator 4 and a metal sealing plate ( Cover) 5 is sealed and constituted. The two ends of the exterior can 2 and the sealing plate 5 are made into circles.

[0023] The electrode body 3 will be made of LiCoO 2 A positive electrode sheet that is an active material, a negative electrode sheet that uses graphite as an active material, and a separator that insulates these two sheets are laminated, wound in a spiral shape, and flattened as a whole. The conductive sheets 7 and 8 are drawn upward from the positive electrode sheet and the negative electrode sheet respectively. The electrolyte is to dissolve LiPF in a ...

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PUM

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Abstract

The present invention relates to sealed batteries, object to remove the fluctuation of the jogged state resulting from the dimensional tolerances of a liquid injection port (17) and a seal bolt (18) and to realize the sealability improvement of the liquid injection port (17) performed by the seal bolt (18). In this invention, the spreading and deformation of the shaft section(25) of the seal bolt(18) is performed by pressing an operation pin (29) in a function hole (30), so that the external circumstance surface of the shaft section (25) is pressed on the internal circumstance surface of a filling hole (19). Thus, the sealing-joining performance of the entire circumference scope between the external circumstance surface of the shaft section (25) and the internal circumstance surface of the filling hole (19) can be improved, so as to improve the sealability between the shaft section (25) of the seal bolt (18) and the filling hole (19) of the liquid injection port (17).

Description

technical field [0001] The present invention relates to a sealed battery with a cover that blocks the opening of the battery case, a liquid injection port provided on the cover for injecting electrolyte solution, and a sealing plug installed in the liquid injection port, and relates to the realization of improving the injection rate obtained by the sealing plug. The technology of the sealing characteristics of the liquid port. Background technique [0002] In the sealed battery related to the present invention, the liquid injection port is formed in a stepped shape with a concave portion, and after the sealing plug having a head is attached to the liquid injection port, the outer peripheral edge of the head and the peripheral portion of the concave portion are welded. Thus, the liquid injection port is sealed, and a similar sealing structure can also be seen in, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2006-40690). [0003] In this patent do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M2/04H01M2/36
CPCY02E60/12Y02E60/10H01M50/147H01M50/308H01M50/317H01M50/183
Inventor 山本真由美藤原义久
Owner HITACHI MAXELL ENERGY LTD