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Flexible lithium ion battery and manufacturing method therefor

A lithium-ion battery, flexible technology, applied in the direction of electrolyte battery manufacturing, secondary battery, battery pack components, etc., can solve the problems of small cell damage, complex process, complex assembly process, etc. Simple and convenient material retrieval effect

Inactive Publication Date: 2016-12-14
JIANGSU SHENSU ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Low energy density
The energy of the entire battery comes only from the battery core, and the flexible substrate and fillers occupy more space, resulting in a significantly lower energy density of the entire battery than the current commercially produced lithium batteries
[0006] 2. The process is complicated and the efficiency is low
The assembly process is complex and the production efficiency is low
[0007] 3. Not flexible enough
The small battery itself has no flexibility, repeated bending or large bending may cause damage to the small battery, affecting the electrical performance and safety performance of the battery

Method used

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  • Flexible lithium ion battery and manufacturing method therefor
  • Flexible lithium ion battery and manufacturing method therefor
  • Flexible lithium ion battery and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 As shown, the structure diagram of the flexible lithium-ion battery provided in this embodiment includes a sealed package 6 and a battery pack and electrolyte disposed inside the sealed package 6. The battery pack includes a positive electrode sheet 1, a negative electrode sheet 2 and a set The separator 3 between the positive electrode sheet 1 and the negative electrode sheet 2; the positive electrode ear 7 connected to the positive electrode sheet and the negative electrode ear 8 connected to the negative electrode sheet are arranged on one side of the battery pack, and the positive electrode ear 7 and the negative electrode ear 8 pass through the sealed package Part 6; the electrolyte is filled in the sealed package 6. In this embodiment, the isolation film 3 can be one or more of ceramic film, PE film, PP film or PE and PP composite film; the sealed package 6 is an aluminum-plastic film. The flexible lithium-ion battery provided in this embodiment ...

Embodiment 2

[0050] This embodiment is a further improvement on the basis of Embodiment 1, as figure 2 and image 3 As shown, it also includes a flexible fixing assembly 5, the flexible fixing assembly 5 is arranged inside the sealed package 6, the positive electrode sheet 1, the negative electrode sheet 2 and the separator 3 are provided with through holes 4 corresponding to and coincident with each other. The fixing component 5 passes through the positive electrode sheet 1 , the negative electrode sheet 2 and the separator 3 through the through hole 4 and fixes the battery pack and the sealed package 6 . In this embodiment, the flexible fixing component 5 is a polymer material, which may be one of polyethylene, polypropylene, polyvinyl chloride, polybutylene terephthalate and polystyrene.

[0051] The manufacturing method of flexible lithium-ion battery described above, comprises the following steps:

[0052] Step 1, the positive electrode sheet and the negative electrode sheet are pu...

Embodiment 3

[0061] The positive electrode sheet, negative electrode sheet, separator, etc. required by the flexible lithium-ion battery of the present invention are currently commonly used battery materials, and commercially available products can be used or prepared by oneself, which has no effect on the realization of the purpose of the present invention. A kind of present invention is provided below The specific preparation method of the flexible lithium-ion battery is as follows:

[0062] Preparation of lithium-ion full battery: the positive electrode sheet, negative electrode sheet, and separator are laminated to make lithium-ion battery cells;

[0063] Positive plate material area size: 80mm*50mm (length*width);

[0064] Negative sheet area size: 82mm*52mm;

[0065] Isolation film width: 54mm; Isolation film is 16um Al 2 o 3 Ceramic separator.

[0066] Before lamination, the positive electrode and negative electrode are perforated, the aperture of the positive electrode is 1.8m...

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Abstract

The invention discloses a flexible lithium ion battery and a manufacturing method therefor. The flexible lithium ion battery comprises a sealed packaging part, and a battery pack and an electrolyte which are arranged in the sealed packaging part; the battery pack comprises positive plates, negative plates and isolating membranes which are arranged between the corresponding positive plates and negative plates; a positive tab connected with the positive plates and a negative tab connected with the negative plates are arranged on one side of the battery pack; the positive tab and the negative tab penetrate through the sealed packaging part; and the sealed packaging part is filled with the electrolyte. According to the flexible lithium ion battery, a polymer material is used as a fixed assembly; through holes are filled with the melted polymer material; then the melted and re-cured fastened polymer material, the isolating membrane, and the sealed packaging part are in contact and are connected into one body to play a ''framework'' effect in the battery; and the positive and negative plates and the isolating membrane are fixed by the ''framework'' in a bending process of the battery, so that obvious relative sliding between the positive and negative plates and the isolating membrane is prevented, and damage to pole pieces and the internal structure of the battery is avoided.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a flexible lithium ion battery and a manufacturing method thereof. Background technique [0002] As a new type of secondary battery with high energy density and environmental protection, lithium-ion batteries are widely used in portable electronic products, electric vehicles, energy storage and other fields. Especially with the vigorous development of smartphones, tablet computers, super notebook computers and smart wearable devices in recent years, the market demand for lithium-ion batteries has also grown rapidly. [0003] With the rapid development of smart wearable devices and the promotion of curved surface and flexible screen technologies, higher requirements have been put forward for supporting lithium-ion battery products---flexibility and bendability. Due to the inherent structural characteristics, traditional batteries cannot be flexible and bendable: traditional h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058H01M2/02
CPCH01M10/0525H01M10/058H01M50/116Y02E60/10Y02P70/50
Inventor 周江王正飞杨同兴马骁
Owner JIANGSU SHENSU ELECTRONICS TECH CO LTD
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