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Three-layer flexible battery structure and preparation method therefor

A flexible battery and battery technology, applied in secondary battery manufacturing, small flat battery/battery, climate sustainability, etc., can solve the problems of reduced ductility, achieve high ductility, maximize battery coverage, and improve unit The effect of area capacity

Active Publication Date: 2017-05-10
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Constructing a network of interconnected islands is an effective way to make flexible batteries highly extensible; increasing the area of ​​the islands, that is, increasing the battery coverage, is conducive to the greater capacity per unit area of ​​flexible batteries, but at the same time it is also It will cause a decrease in ductility; the flexible battery constructed with a platform-like substrate can achieve a battery coverage of 70% while ensuring stretchability; the self-similar structure design makes lithium-ion batteries have great ductility and flexibility. High battery coverage is maintained, but these designs still cannot maximize battery coverage

Method used

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  • Three-layer flexible battery structure and preparation method therefor
  • Three-layer flexible battery structure and preparation method therefor
  • Three-layer flexible battery structure and preparation method therefor

Examples

Experimental program
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Embodiment 1

[0026] Embodiment 1: see Figure 1 to Figure 4 , a three-layer flexible battery structure, which includes a flexible substrate 1, an island bridge structure 2, and a battery 3;

[0027] The flexible substrate 1 is a flexible insulating material that can be stretched in all directions;

[0028] The island bridge structure 2 is placed on the flexible substrate 1; the island bridge structure 2 includes a conductive small cylinder 21 and a copper wire 22; the copper wire 22 connects the conductive small cylinder 21 in parallel; the conductive small cylinder The distance between 21 is the same as the distance between the terminals of the two batteries 3;

[0029] The batteries 3 and the small conductive cylinders 21 of the island bridge structure 2 are pasted together with conductive silver glue; the batteries 3 correspond to the small conductive cylinders 21 one by one, and are closely arranged to cover the entire base.

[0030] Furthermore, the flexible substrate 1 is made of E...

Embodiment 2

[0033] Embodiment 2, a method for preparing a three-layer flexible battery structure, comprising the following steps:

[0034] A. Prepare PI film by spin coating method;

[0035] B. Evaporate a layer of copper foil on the surface of the PI film, and photoetch the copper foil to form an island bridge shape;

[0036] C. Hot-press a layer of PI film on the formed island bridge-shaped copper foil, and then dry-etch the newly hot-pressed PI film on the conductive small cylindrical area to expose the copper island;

[0037] D. Use laser cutting to make the PI film form the same shape as the copper island bridge structure, and make the PI film slightly wider than the copper foil to obtain the entire island bridge structure;

[0038] E. Repeat steps A-D to make the second layer of island bridge structure;

[0039] F. The first layer of the island bridge structure is all glued to the stretchable substrate on one side of the PI film;

[0040] G. Use conductive glue to bond the positi...

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Abstract

The invention discloses a three-layer flexible battery structure. The three-layer flexible battery structure comprises a flexible substrate (1), island bridge structures (2) and batteries (3). The batteries and wires on the flexible substrate are designed in a three-layer structure; a tightly-arranged battery array is arranged in the middle layer; conductive small cylinders and copper wires for enabling the conductive small cylinders to be connected in parallel are arranged on the upper and lower sides of the batteries, and positive electrodes and negative electrodes of the batteries are lead out by the conductive small cylinders and the copper wires; each small cylinder is corresponding to a square battery part which is concentric with the small cylinder; the batteries are tightly arranged to cover the whole substrate; the overall structure has high ductility; and meanwhile, the maximum of battery coverage rate is realized, so that unit area capacity of the batteries is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of flexible battery manufacturing, and in particular relates to a three-layer flexible battery structure and a preparation method. Background technique [0002] Flexible batteries can continuously power LEDs, etc., can be stretched, folded, bent, and can even be installed on the wrist to work as usual. This kind of battery can be used anywhere, including inside the human body, which means that we can implant electronic devices into the human body to monitor brain waves and heart activity signals, which cannot be done with traditional batteries. Constructing a network of interconnected islands is an effective way to make flexible batteries highly extensible; increasing the area of ​​the islands, that is, increasing the battery coverage, is conducive to the greater capacity per unit area of ​​flexible batteries, but at the same time it is also It will cause a decrease in ductility; the flexible battery constr...

Claims

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Application Information

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IPC IPC(8): H01M10/04
CPCH01M10/04H01M10/0436Y02E60/10Y02P70/50
Inventor 苏业旺赵宏宇
Owner INST OF MECHANICS - CHINESE ACAD OF SCI