Polymer electrolyte battery and method of producing same

A technology of electrolyte and polymer, applied in the field of polymer electrolyte battery and its manufacturing, can solve the problems of inconvenient adjustment of battery thickness, extremely difficult to obtain curvature, short circuit of laminated electrodes, etc.

Inactive Publication Date: 2003-02-05
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this method, although the battery element is maintained in a curved structure, the rollers having different diameters apply shear stress to the portion between the active material layer and the current collector, thereby undesirably increasing the resistance of the battery, and easily A short circuit occurs at the end of the laminated electrode, making it difficult to obtain stable battery performance
In addition, not only is it extremely difficult to obtain the curvature of the desired curved structure, but also the thickness of the battery is not easy to adjust.

Method used

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  • Polymer electrolyte battery and method of producing same
  • Polymer electrolyte battery and method of producing same
  • Polymer electrolyte battery and method of producing same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0109] [production of positive electrode]

[0110] Measure and use 92 parts by weight of LiCoO as the positive electrode active material 2 , 5 parts by weight of powdered graphite as a conductive material and 3 parts by weight of powdered polyvinylidene fluoride as a binder, as components of the positive electrode composition mixture. Then, these components were dispersed into N-methylpyrrolidone to prepare a slurry of a positive electrode composition mixture.

[0111] Then, the prepared positive electrode composition mixture was uniformly coated on both surfaces of a positive electrode current collector made of aluminum foil (20 μm in thickness), and then dried under reduced pressure at a temperature of 100 °C for 24 hours to form Positive electrode active material layer. Thereafter, the positive electrode active material layer was compression molded using a rolling machine to form a positive electrode sheet. Thereafter, the positive electrode sheet was cut to manufacture ...

example 2

[0123] In addition to using a heat press including a concave heating block and a flat heating block to perform heat compression welding on the flat battery element sealed in the outer packaging film, the polymer electrolyte battery is manufactured in the same way as in Example 1, so that the vertical The cross-section of the battery element on the winding shaft has a substantially semicircular shape.

example 3

[0125] In addition to using a heat press including a concave heating block having a flat portion in the central area of ​​the curved portion, on which a 1 mm thick silicone rubber sheet is adhered, and a convex heating block having a flat portion in the central area of ​​the curved portion , except that the flat-shaped battery sealed in the outer packaging film is subjected to thermocompression welding, a polymer electrolyte battery is manufactured in the same manner as in Example 1, so that the cross section of the battery element perpendicular to the winding axis has a flat portion in at least a part thereof curved shape.

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Abstract

In a polymer electrolyte battery including a battery element having a cathode and an anode coiled through a polymer electrolyte, a section of the battery element perpendicular to the coiling axis has a curved form. As compared with a polymer electrolyte battery having a flat plate type battery element curved, the former battery has an extremely low possibility of short-circuit at the end of an electrode and excellent battery characteristics.

Description

technical field [0001] The present invention relates to a polymer electrolyte battery having a battery element having a negative electrode and a positive electrode wound by a polymer electrolyte and a method of manufacturing the same, and more specifically, to an improvement in the shape of the battery element. Background technique [0002] In recent years, as portable electronic devices have been miniaturized and reduced in weight, there has been an urgent need to reduce the size, thickness, or weight of batteries that supply power to these electronic devices, whether used as driving devices or backup devices. [0003] As a battery satisfying such requirements, a non-aqueous electrolyte battery has been developed and put into practical use, which is called a lithium battery, which includes a positive electrode having an active material capable of reversibly introducing and separating lithium ions and negative electrode, and a non-aqueous electrolyte, and has the advantages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/05H01B1/12H01M4/62H01M4/66H01M6/06H01M6/10H01M6/18H01M10/04H01M10/0565H01M10/0587H01M50/119H01M50/121H01M50/129
CPCH01M4/525H01M2006/106H01M10/0525H01M10/0431H01M2004/025H01M2002/0205H01M2010/0495H01M2300/0082H01M4/66H01M2/0275H01M6/10H01M4/622H01M10/04H01M4/583H01M4/485H01M2300/0085H01M10/0565H01M2/0287H01B1/122Y10T29/49114Y02E60/10H01M50/124Y02P70/50H01M10/058H01M50/121H01M50/129H01M50/119
Inventor 远藤贵弘毛塚浩一郎八田一人近藤雄之
Owner MURATA MFG CO LTD
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