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Secondary battery and method of producing the secondary battery

A secondary battery, sequential technology, used in secondary battery manufacturing, secondary batteries, battery electrodes, etc., can solve problems such as lack of practicality, insufficient mechanical strength, and inability to achieve uniform coating of thin film electrolytes

Active Publication Date: 2008-12-10
ENVISION AESC JAPAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of solid gelled electrolytes leads to insufficient mechanical strength and the inability to achieve uniform coating of thin-film electrolytes, resulting in a lack of practicality.

Method used

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  • Secondary battery and method of producing the secondary battery
  • Secondary battery and method of producing the secondary battery
  • Secondary battery and method of producing the secondary battery

Examples

Experimental program
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Effect test

no. 1 approach

[0129] FIG. 2 shows a typical lithium ion secondary battery according to a first embodiment of the present invention. More specifically, FIG. 2 shows a flat type (stacked type) non-bipolar lithium-ion secondary battery (hereinafter otherwise simply referred to as "non-bipolar lithium-ion secondary battery" or "non-bipolar secondary battery") ) is a schematic cross-sectional view of the entire structure.

[0130]As shown in FIG. 2 , the non-bipolar lithium ion secondary battery 10 according to the first embodiment has a battery exterior 22 using a composite laminated film containing a polymer and a metal. A structure in which the power generating element (battery element) 17 is sealed and housed in the battery outer package 22 is created by heat-sealing the entire periphery of the laminated film. Here, the power generating element 17 has a structure in which a positive electrode plate, a separator layer 13, and a negative electrode plate are stacked, wherein the positive elect...

no. 2 approach

[0134] FIG. 3 shows a typical bipolar lithium ion secondary battery according to a second embodiment of the present invention. More specifically, FIG. 3 shows the entirety of a flat type (stacked type) bipolar lithium ion secondary battery (hereinafter otherwise simply referred to as "bipolar lithium ion secondary battery" or "bipolar secondary battery"). Schematic cross-sectional view of the structure.

[0135] As shown in FIG. 3 , a bipolar lithium ion secondary battery 30 according to the second embodiment has a substantially rectangular power generating element (battery element) 37 for actually performing charging and discharging reactions that is sealed and accommodated in a battery outer package. 42 in the structure. As shown in FIG. 3 , a power generating element (battery element) 37 of a bipolar lithium ion secondary battery 30 according to the second embodiment has a structure in which a separator layer 35 is sandwiched between two or more bipolar electrodes 34 . I...

no. 3 approach

[0141] [External structure of lithium-ion secondary battery]

[0142] Figure 4 A perspective view showing a typical lithium ion secondary battery according to a third embodiment of the present invention, that is, a flat stacked non-bipolar or bipolar lithium ion secondary battery.

[0143] Such as Figure 4 As shown, the flat stacked lithium-ion secondary battery 50 is flat and rectangular, and its first and second sides are respectively formed with a positive electrode sheet 58 and a negative electrode sheet 59 for extracting electric power. The power generating element (battery element) 57 is packaged by the battery outer package 52 of the lithium ion secondary battery 50, and has a heat-sealed periphery. The power generating element 57 is sealed in a state where the positive electrode tab 58 and the negative electrode tab 59 are drawn out. Here, the power generating element (battery element) 57 is the power generating element (battery element) 17 of the non-bipolar lithiu...

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Abstract

A secondary battery includes: an electric cell layer including a stack structure sequentially including: a positive electrode layer, a separator layer, and a negative electrode layer having an electrolyte higher in conductivity than an electrolyte of at least one of the separator layer and the positive electrode layer.

Description

technical field [0001] The present invention relates to a secondary battery capable of producing high capacity and high output and a method of manufacturing the same. Background technique [0002] A secondary battery, especially a lithium ion secondary battery, generally includes a positive electrode (positive electrode layer), a liquid or solid electrolyte layer (separator layer), and a negative electrode (negative electrode layer). In this case, the positive electrode active material and the negative electrode active material are mixed with a conductive aid, a binder, and the like, and then applied to a collector, thereby forming a positive electrode and a negative electrode, respectively. [0003] In the development trend, the above-mentioned lithium ion secondary battery requires higher energy density and higher output, and the strategy is to make the secondary battery thinner. In order to realize the above-mentioned lightweight and thin secondary battery, one solution ...

Claims

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Application Information

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IPC IPC(8): H01M10/40H01M2/16H01M10/04H01M4/64H01M4/13H01M4/139H01M10/0565H01M10/0566H01M10/0585H01M50/40H01M50/411
CPCY02E60/10Y02P70/50H01M4/13H01M4/70H01M10/04H01M10/0525H01M10/056H01M10/0585H01M2300/0025H01M2300/0082H01M10/0565
Inventor 久光泰成堀江英明金子健人岛村修
Owner ENVISION AESC JAPAN LTD
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