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Electrode lead connection body, nonaqueous electrolyte electricity storing device and method of manufacturing the same

A technology of electrode leads and connectors, which is applied in the field of electrode lead connectors and non-aqueous electrolyte storage devices, can solve problems such as difficulty in obtaining sealing, electrolyte leakage, and increased loss, and achieve assembly process and sufficient joint strength , the effect of reliable connection

Inactive Publication Date: 2013-05-15
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in Patent Document 1, the corrosion-resistant material covering the joint portion of the first member and the second member of the lead member is configured to overlap the sealing portion of the exterior body, so that it is thicker than the uncovered lead member. It is difficult to obtain sufficient airtightness in the heat sealing process, so there is a possibility of electrolyte leakage
[0012] In addition, in Patent Document 2 and Patent Document 3, the resin-coated portion covering the different types of junctions of the lead members is located outside the exterior body. Since the resin-coated part interferes with manufacturing jigs and tools, there is a possibility of damage to the resin-coated part, and the length of the electrode lead part from the outer body end to the resin-coated part end is designed to be larger than the size of the manufacturing jig and tool. Therefore, it can be said that there is a problem in realizing the miniaturization and thinning of non-aqueous electrolyte power storage devices
In addition, after the battery cell is manufactured, when different types of metals are bonded to the electrode lead part and coated with resin, the workability of resin coating in the assembled battery form after the connection is not good, and the loss in the case of becoming a defective product is also reduced. Large, and not only lead parts, battery cells are also affected

Method used

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  • Electrode lead connection body, nonaqueous electrolyte electricity storing device and method of manufacturing the same
  • Electrode lead connection body, nonaqueous electrolyte electricity storing device and method of manufacturing the same
  • Electrode lead connection body, nonaqueous electrolyte electricity storing device and method of manufacturing the same

Examples

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Embodiment 1）

[0060] An Al plate having a thickness of 0.3 mm, a width of 30 mm, and a length of 50 mm was used as the first member of the electrode lead connection body, and a Cu plate having the same size as the first member was used as the second member.

[0061] A polypropylene-based thermoplastic resin film is sandwiched between the first member and the second member, and the second member is superimposed on the upper surface with an overlapping amount of 10 mm, and ultrasonic waves are applied from the Cu plate side of the second member to apply a load. join.

[0062] The connection of the battery cell of a lithium ion secondary battery is performed using this electrode lead connection body. The positive electrode of the battery cell uses Al and the negative electrode uses Cu, and together with the separator and the electrolyte, it is sealed into a rectangular shape by an exterior body composed of an aluminum laminated film, and the positive electrode lead made of Al and the lead wire...

Embodiment 2）

[0065] An Al plate having a thickness of 0.3 mm, a width of 30 mm, and a length of 50 mm was used as the first member of the electrode lead connection body, and a Cu plate having the same size as the first member was used as the second member.

[0066] A polypropylene-based thermoplastic resin is sandwiched between the first member and the second member, and the second member is placed on top with an overlapping amount of 10mm, and ultrasonic waves are applied from the Cu plate side of the second member to apply a load to join. In addition, holes for electrode welding are formed in the first member and the second member by press working, and protrusions are formed on edges of the holes for electrode welding.

[0067] The connection of the battery cell of a lithium ion secondary battery is performed using this electrode lead connection body. Al is used for the positive electrode of the battery cell, and Cu is used for the negative electrode. They are sealed together with a sep...

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Abstract

An electrode lead connection body includes a first member that includes a same material as the positive electrode lead and is configured to be connected the positive electrode lead, a second member that includes a same material as the negative electrode lead and is configured to be connected the negative electrode lead, the first and second members being joined to each other at a portion excluding a positive electrode joint as a portion to be joined to the positive electrode lead and a negative electrode joint as a portion to be joined to the negative electrode lead, and an insulating material at a position between the first and second members and near a joint portion to join the first and second members so as to prevent a contact between the first and second members.

Description

technical field [0001] The present invention generally relates to an electrode lead connected body, a non-aqueous electrolyte power storage device, and a manufacturing method thereof for electrically connecting a positive electrode lead connected to a positive electrode of a battery cell and a negative electrode lead connected to a negative electrode of another battery cell. Background technique [0002] In recent years, the practical development of nonaqueous electrolyte secondary batteries represented by lithium ion secondary batteries. Compared with other batteries such as lead-acid batteries, non-aqueous electrolyte secondary batteries have higher energy output per unit volume (unit mass), so they are applicable to electric vehicles, hybrid vehicles, and solar-powered vehicles starting with mobile communication equipment and notebook computers. Development of power storage systems for electricity from renewable energy sources such as batteries. [0003] The battery cell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M10/0525H01M10/058H01M50/50H01M50/516H01M50/522H01M50/534H01M50/569
CPCY02E60/12Y02E60/122H01M2/32H01M2/26H01M10/0525H01M2/202H01M10/058Y02E60/10H01M50/571Y02P70/50H01M50/522H01M50/534H01M50/516H01M50/569H01M50/50
Inventor 佐藤巧远藤裕寿村上贤一小松广明
Owner HITACHI METALS LTD
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