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Terminal structure of secondary battery and secondary battery

A terminal structure and secondary battery technology, applied in secondary batteries, small-sized batteries/battery packs, structural parts, etc., can solve the problem of large-scale non-aqueous electrolyte secondary batteries

Inactive Publication Date: 2017-04-05
HITACHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, around the terminal, space is required for connecting multiple plates
Therefore, there is a problem of increasing the size of the non-aqueous electrolyte secondary battery

Method used

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  • Terminal structure of secondary battery and secondary battery
  • Terminal structure of secondary battery and secondary battery
  • Terminal structure of secondary battery and secondary battery

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Embodiment Construction

[0034] Hereinafter, the structure of the embodiment of the terminal structure and the secondary battery of the present invention will be described in detail with reference to the drawings. figure 1It is a partial cross-sectional front view of a lithium ion secondary battery 1 as a nonaqueous electrolyte secondary battery to which the terminal structure of the first embodiment of the present invention is applied. However, in this embodiment, in order to facilitate understanding, the thickness dimensions of some members are exaggeratedly drawn, and the number of pairs and pole plates is also smaller than the actual number.

[0035] Such as figure 1 As shown, the lithium ion secondary battery 1 of the present embodiment includes an electrode plate group 3 and a rectangular battery container 5 made of stainless steel that accommodates the electrode plate group 3 therein. The battery container 5 includes a battery can 7 with one end open and a battery cover 9 , and after the elect...

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Abstract

The present invention provides a secondary battery in which contact resistance does not increase even if the number of stored electrode plates is increased. Two threaded holes (11d) are formed on opposite surfaces (11c) of the terminal main body portion (11b) of the positive terminal (11) in the stacking direction. Between the two screw holes (11d), there is provided a protruding surface (11e) that protrudes further toward the positive electrode side pressing member (25) than the portion where the screw hole (11d) is provided. The protruding surface (11e) protrudes 0.2 mm further toward the positive electrode side pressing member (25) than the portion where the two screw holes (11d) are provided.

Description

technical field [0001] The present invention relates to a terminal structure of a secondary battery and the secondary battery. Background technique [0002] Non-aqueous electrolyte secondary batteries such as lithium-ion batteries have the advantages of high energy density, less self-discharge, and good cycle performance. Therefore, in recent years, non-aqueous electrolyte secondary batteries have been expected to be used as power sources for various industrial machines by increasing their size or capacity. In order to increase the capacity of the nonaqueous electrolyte secondary battery, there is a nonaqueous electrolyte secondary battery in which the number of electrode plates accommodated in the nonaqueous electrolyte secondary battery is increased. [0003] The pole plates need to be electrically connected to the electrode terminals respectively. Therefore, in a non-aqueous electrolyte secondary battery in which the number of stored electrode plates is increased, it is...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M2/30H01M50/176H01M50/536H01M50/54H01M50/55H01M50/553H01M50/562H01M50/566
CPCH01M50/54H01M50/176H01M50/553H01M50/562H01M50/566H01M50/536H01M50/55Y02E60/10H01M10/0525H01M50/561H01M50/543
Inventor 钉野智史三代祐一朗中野光雅
Owner HITACHI CHEM CO LTD
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