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Negative electrode, battery, battery pack, electronic device, electric vehicle, electric storage device, and electric power system

A technology for power storage devices and electronic equipment, applied in the field of power systems, which can solve problems such as the decline in battery characteristics such as charge and discharge efficiency, high battery capacity, and high output characteristics, and achieve the effect of suppressing the increase in internal resistance and improving adhesion

Pending Publication Date: 2019-07-02
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the internal resistance of the battery increases, battery characteristics such as charge and discharge efficiency, battery capacity, and high output characteristics decrease

Method used

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  • Negative electrode, battery, battery pack, electronic device, electric vehicle, electric storage device, and electric power system
  • Negative electrode, battery, battery pack, electronic device, electric vehicle, electric storage device, and electric power system
  • Negative electrode, battery, battery pack, electronic device, electric vehicle, electric storage device, and electric power system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0030] 1 First Embodiment (Example of Cylindrical Battery)

no. 2 approach

[0031] 2 Second Embodiment (Example of Laminated Film Type Battery)

no. 2 approach ＞

[0160] [composition of the battery]

[0161] image 3 It is an exploded perspective view showing a configuration example of the secondary battery according to the second embodiment of the present technology. This secondary battery is called a so-called flat type or a square type, and is a secondary battery in which a wound electrode body 30 to which a positive electrode lead 31 and a negative electrode lead 32 are attached is housed inside a film-shaped exterior member 40, so that it is compact. Minimization, weight reduction and thinning are possible.

[0162] The positive electrode lead 31 and the negative electrode lead 32 are led out from the inside of the exterior member 40 toward the outside, for example, in the same direction. The positive electrode lead 31 and the negative electrode lead 32 are made of metal materials such as aluminum, copper, nickel, or stainless steel, respectively, and are each in the shape of a thin plate or a mesh.

[0163] The exterior member ...

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Abstract

Provided is a battery that comprises: a positive electrode; a negative electrode; and an electrolyte, wherein the negative electrode includes active material particles and a binder having a network structure, and a space between the active material particles is filled with the network structure.

Description

technical field [0001] This technology relates to negative electrodes, batteries, battery packs, electronic equipment, electric vehicles, power storage devices and power systems. Background technique [0002] Generally, in the negative electrode, since the binder exists in the form of covering the surface of the active material particles, only the particles on the surface of the particles are bonded between the active material particles and the active material particles and between the current collector and the active material particles. part, and the tightness between them will decrease. In order to improve the reduction of adhesion, it is enough to mix more than a certain amount of binder into the electrode mixture, but increasing the amount of binder will make the gap between the active material particles and the active material particles, as well as between the current collector and the active material. The binder exists between the material particles in excess, and the...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/62
CPCH01M2220/20H01M10/0525H01M4/622Y02E60/10H01M2004/021H01M2004/027H01M4/62H01M4/13
Inventor 福田真纯木暮太一松井贵昭加藤良和大沼亚未宫崎美纪尾上精二
Owner MURATA MFG CO LTD
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