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Non-aqueous electrolyte battery

A non-aqueous battery, current collector technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes and other directions, can solve the problems of thin battery design, bad insulation belt battery thickness, etc.

Inactive Publication Date: 2007-09-26
HITACHT MAXELL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a possibility that the thickness of the insulating tape increases the thickness of the battery, which may have a bad influence on the thinner design of the battery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] With N-methyl-2-pyrrolidone (NMP) as the solvent, 85 parts by mass of LiCoO as the positive electrode active material 2 10 parts by mass of acetylene black as a conductive auxiliary agent and 5 parts by mass of PVDF as a binder were uniformly mixed to prepare a paste containing the positive electrode mixture. Apply this paste on both sides of an aluminum foil with a thickness of 15 μm as a current collector so that the active material coating length on the surface is 280 mm, and the active material coating length on the back is 210 mm. After drying, calendering is performed. For processing, after adjusting the thickness of the positive electrode mixture layer so that the total thickness was 150 μm, it was cut to prepare a positive electrode with a length of 302 mm and a width of 43 mm. In addition, an aluminum tab (3 mm in width and 80 μm in thickness) serving as a lead was connected to the exposed portion of the positive electrode aluminum foil by ultrasonic welding. ...

Embodiment 2

[0060]

[0061] Except using polyethylene powder (Sumitomo Seika Co., Ltd. (SUMITOMOSEIKA CHEMICALS Co., LTD) FLO-BEADS LE1080 (trade name)) with an average particle diameter of 3 μm, and the thickness of the insulating resin layer being 6 μm, the same as in Example 1 To operate, and prepare non-aqueous secondary batteries.

Embodiment 3

[0063] A non-aqueous secondary battery was produced in the same manner as in Example 1 except that polypropylene powder (SEISHIN ENTERPRISE Co., Ltd. PPW-5 (trade name), average particle diameter: 6 μm) was used.

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Abstract

A non-aqueous electrolyte battery having an wound electrode body including a positive electrode having a layer of a positive electrode active material formed on a current collector, a negative electrode having a layer of a negative electrode active material formed on a current collector and a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, where the positive electrode has an exposed portion having no layer of the positive electrode active material at least at one of a winding-start edge and a winding-finish edge of the positive electrode so as to provide a lead member connected to an external terminal, an insulating layer of plural resins is formed on the exposed portion of the current collector of the positive electrode in a part in which the exposed portion of the current collector of the positive electrode faces that of the negative electrode via the separator, and the winding-start edge or the winding-finish edge of the positive electrode having no lead member has no exposed portion of the current collector.

Description

technical field [0001] The present invention relates to a non-aqueous battery, and more specifically, to a non-aqueous battery suitable as a power source for portable electronic devices, electric vehicles, load leveling, and the like. Background technique [0002] Lithium-ion batteries, one of non-aqueous batteries, are widely used as power sources for portable devices such as mobile phones and notebook personal computers due to their high energy density. In addition, due to concerns about environmental issues, the importance of rechargeable secondary batteries is increasing. In addition to portable devices, applications to automobiles, electric chairs, and household and commercial current storage systems are also being studied. [0003] In the current lithium-ion battery, the positive electrode, negative electrode and separator are wound into a cylindrical or flat shape to form a vortex-shaped power generator, which is inserted into an aluminum or stainless steel metal can,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M4/02H01M2/16H01M6/14H01M4/13H01M6/16H01M10/05H01M10/0587H01M50/531H01M50/586H01M50/595
CPCH01M4/505H01M4/525H01M2004/028H01M2/26H01M2/34H01M2/347Y02E60/122H01M10/0587H01M4/131Y02E60/10H01M50/579H01M50/531Y02P70/50H01M50/595H01M50/586H01M10/052H01M50/572H01M50/538H01M10/0431H01M4/13H01M2004/029
Inventor 樋口勇人阿部敏浩
Owner HITACHT MAXELL LTD
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