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Battery and battery manufacturing method

A manufacturing method and battery technology, which are applied in the manufacture of secondary batteries, small-sized batteries/batteries, secondary batteries, etc., can solve the problems of difficulty in returning to the active material layer and easy retention of electrolytes.

Active Publication Date: 2016-02-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrolyte solution extruded to the outside of the flat wound electrode body tends to stagnate at the bottom of the battery case separated from the flat wound electrode body, and it is difficult to return to the active material layers in the flat wound electrode body.

Method used

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  • Battery and battery manufacturing method
  • Battery and battery manufacturing method

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Embodiment approach

[0082] Next, a battery according to an embodiment of the present invention will be described with reference to the drawings. First, refer to Figure 1~3 The battery 1 according to the embodiment will be described. The battery 1 is provided with a flat electrode body 10. The electrode body 10 has a strip-shaped positive electrode plate 20, a negative electrode plate 30, and a separator 40, and the separator 40 is interposed between the positive electrode plate 20 and the negative electrode plate 30. , and wound around the winding axis AX (refer to figure 1 , 2 ). In addition, a positive electrode current collecting member 50 bonded to the positive electrode plate 20 of the electrode body 10, a negative electrode current collecting member 60 bonded to the negative electrode plate 30, and a positive electrode active material layer winding portion 14 held in the electrode body 10 (to be described later) are provided. , Negative electrode active material layer winding part 19)...

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Abstract

The present invention provides a battery and a method for manufacturing the battery. The object of the present invention is to provide an electrolytic solution capable of easily releasing gas generated inside a flat wound electrode body to the outside of the electrode body and suppressing extrusion from the flat wound electrode body due to charging and discharging. (Holding Electrolyte Solution) A battery that flows directly out of a flat wound electrode body, and a method for manufacturing such a battery. The battery has a flat wound electrode body, a current collector, and a holding electrolyte. The flat wound electrode body is formed by winding an electrode plate, has a flat oblong cross-section, and has an active material layer forming a wound active material layer. The winding portion and the exposed winding portion of the winding foil exposed portion, the exposed winding central portion maintains its connection with the active material layer winding portion adjacent in the axial direction, and is connected to at least one of the two exposed winding end portions. One side is disconnected, and the current collecting member is joined to the exposed central portion of the winding.

Description

technical field [0001] The present invention relates to a battery having a flat wound electrode body having an electrode plate wound around a winding shaft and having a flat oblong cross-section, and a method for manufacturing the battery. Background technique [0002] In recent years, rechargeable lithium-ion secondary batteries (hereinafter, simply referred to as batteries) have been used as power sources for driving mobile electronic devices such as hybrid vehicles and electric vehicles, notebook computers, and video cameras. As such a battery, for example, there is an electrode body (corresponding to a flat wound electrode body described later) that is wound around a winding axis (corresponding to an electrode plate described later) and formed into an oblong shape with a flat cross section. ) battery (for example, the Battery). [0003] On the other hand, Patent Document 2 discloses a battery in which, in an electrode group having an oblong flat cross section (correspo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M2/26H01M2/30H01M10/0587H01M50/534H01M50/536H01M50/538H01M50/55H01M50/553
CPCH01M10/0431H01M10/0525H01M50/30H01M50/538H01M50/553H01M50/536H01M50/534H01M50/55Y10T29/49108Y02E60/10Y02P70/50H01M4/64H01M50/531Y02T10/70
Inventor 小林极佐野秀树若松直树
Owner TOYOTA JIDOSHA KK
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