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Secondary battery electrode group unit and manufacturing method thereof

A secondary battery and electrode group technology, applied in the field of secondary battery electrode group unit, can solve the problems of increasing resistance, increasing power loss, etc.

Inactive Publication Date: 2016-08-24
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Welding multiple sheets collectively increases electrical resistance at the weld, thereby increasing power loss

Method used

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  • Secondary battery electrode group unit and manufacturing method thereof
  • Secondary battery electrode group unit and manufacturing method thereof
  • Secondary battery electrode group unit and manufacturing method thereof

Examples

Experimental program
Comparison scheme
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no. 2 approach

[0038] Figures 5 to 7 A current collecting member used in a lithium ion secondary battery according to a second embodiment is illustrated. exist Figures 5 to 7 in, with Figures 1 to 4 The same components as those in the illustrated embodiment are passed to the Figures 1 to 4 The reference numerals attached to their counterparts are denoted by adding 100 to the reference numerals, so that descriptions thereof are omitted.

[0039] The positive electrode current collecting member 111 is described as an example. In the second embodiment, the terminal forming portion 115 ( Figure 5 ) and header 116 ( Image 6 A and 6B) Form the positive electrode current collecting member 111 .

[0040] The terminal forming portion 115 is formed by the cylindrical fitting portion 149 to pass through the through hole 147 of the header portion 116 and the cylindrical terminal portion 151 . The diameter of the through-hole 147 formed in the header 116 is just large enough to allow the pas...

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Abstract

Provided are an electrode group unit for a secondary battery in which electrodes and a current collector member can be reliably fixed and in which a large current can flow, and a method of manufacturing the same. In addition to the current path through the current collecting part (16, 18) and the terminal forming part (15, 17) of the current collecting part (11, 13), the conductive part (35, 36) also forms the current flow from the current collecting part (16 , 18) flows to a separate current path of the terminal forming part (15, 17), and is mechanically and electrically connected with the current collecting part (16, 18) and the terminal forming part (15, 17).

Description

technical field [0001] The present invention relates to a secondary battery electrode group unit for a secondary battery such as a lithium ion secondary battery, and a method of manufacturing a secondary battery electrode group unit. Background technique [0002] In some secondary batteries including wound electrode groups such as lithium ion secondary batteries, electrodes (positive and negative electrodes) and current collecting members formed of metal foils are formed using a plurality of tabs integrally formed with the electrodes. (positive electrode current collecting member and negative electrode current collecting member) are connected to each other. However, if the electrodes and the current collecting member are connected to each other using a plurality of sheets, the wound electrode group including the electrodes is not fixed with respect to the current collecting member since it is opposed to the sheet fixed to the current collecting member. Therefore, if strong ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M2/26H01M2/30H01M50/528H01M50/533H01M50/536H01M50/538H01M50/548H01M50/566
CPCH01M50/538H01M50/548H01M50/566H01M50/536H01M50/533H01M10/0422H01M10/0431H01M10/0587H01M10/6553Y10T29/49112Y02E60/10H01M50/528Y02P70/50H01M10/0525H01M50/531H01M50/547H01M4/70
Inventor 三代祐一朗饭田幸雄
Owner RESONAC CORPORATION