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power storage device

A technology of a power storage device and a positive electrode current collector, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as failure to achieve practicality

Active Publication Date: 2018-11-06
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, solid electrolytes used in solid secondary batteries have various problems and have not yet reached practical use.

Method used

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Experimental program
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Embodiment approach 1

[0036] In this embodiment, refer to Figures 1A to 2F A power storage device represented by a high-capacity and flexible lithium secondary battery will be described.

[0037] Note that the lithium secondary battery refers to a secondary battery using lithium ions as carrier ions. Further, examples of carrier ions that can replace lithium ions include alkali metal ions such as sodium and potassium, alkaline earth metal ions such as calcium, strontium, and barium, beryllium ions, and magnesium ions.

[0038] Figure 1A It is a top view explaining the electric storage element which the electric storage device shown in this Embodiment has. For convenience, in the present invention, the term "electrical storage element" is used to describe the layout and connection structure of the positive electrode and the negative electrode. exist Figure 1A Among them, the electric storage element 100 includes a plurality of sheet-like positive electrodes 101 and a plurality of sheet-like neg...

Embodiment approach 2

[0049] In this embodiment, refer to Figures 3A to 3C An example of using a flexible substrate in a structure in which the wound structures shown in Embodiment 1 are connected in series will be described.

[0050] Figure 3A It is a schematic diagram showing a power storage element in which a plurality of wound structures are connected in series using a flexible substrate. As described in Embodiment 1, the wound structure refers to a structure in which the positive electrode 201 and the negative electrode 202 are wound with the separator 203 interposed therebetween. In order to connect the wound structure to other wound structures, a connecting portion 205 is provided for drawing out part of the positive electrode 201 and the negative electrode 202 from the wound portion to the outside of the wound portion (see Figure 3C ). In the power storage element shown in Embodiment 1, the connecting portion is simultaneously used as a connecting portion drawn from other winding port...

Embodiment approach 3

[0058] In this embodiment, refer to 4A to 5B A structure in which the wound structures are connected in parallel, which is different from the structures in which the wound structures are connected in series shown in Embodiments 1 and 2, will be described.

[0059] Figure 4A It is a top view explaining the electric storage element which the electric storage device shown in this Embodiment has. exist Figure 4A Among them, the positive electrode 301 included in the wound structure is extended upward, and the negative electrode 302 included in the wound structure is extended downward. The plurality of wound structures are arranged in parallel, and the positive electrode 301 extending upward is connected to the positive electrode 301 extending from the adjacent wound structure over the upper side of the adjacent wound structure. Likewise, the negative electrode 302 extending downward is connected to the negative electrode 302 of the adjacent wound structure. That is, all the...

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Abstract

One of the objects of the present invention is to provide a bendable sheet-shaped power storage device. This power storage device includes a plurality of wound portions in which a positive electrode and a negative electrode are wound with a separator therebetween, and a coupling portion constituted by portions where the positive electrode and the negative electrode respectively extend to the outside of the plurality of wound portions, wherein the plurality of wound portions The power storage device is connected in series by the coupling portion, and the power storage device is made flexible by bending the coupling portion.

Description

technical field [0001] The present invention relates to a power storage device and a method of manufacturing the same. Background technique [0002] In recent years, a lithium secondary battery as a power storage device has been widely used as a power source for consumer electronic equipment such as information terminals and game machines represented by mobile phones and smart phones. [0003] As such electronic devices, in addition to long life and high capacity, there is an increasing demand for sheet-like and flexible power storage devices in order to achieve weight reduction and miniaturization, and to secure a degree of freedom in external design. By realizing a sheet-like power storage device having flexibility, the power storage device can be provided even in a curved portion or a thin portion such as a watch band of a watch, clothes, thin electronic equipment, and the like. [0004] Conventional lithium secondary batteries of non-aqueous secondary batteries generall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0587H01M50/528
CPCY02E60/10Y02P70/50
Inventor 细谷邦雄田岛亮太
Owner SEMICON ENERGY LAB CO LTD