Lamination lithium ion battery and preparation method thereof

A lithium-ion battery and lamination technology, which is applied in the direction of secondary batteries, circuits, electrical components, etc., can solve problems such as damage to battery pole pieces and structures, battery surface wrinkles, and ugly appearance, so as to improve short circuit and electrochemical performance , improve the effect of penetration

Inactive Publication Date: 2013-12-18
SHENZHEN GREPOW BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The few bent lithium-ion batteries currently on the market are bent with fixtures after the battery is manufactured, which greatly damages the pole piece and structure of the battery, reduces the electrochemical performance of the battery, and poses a safety hazard; In addition, the process of bending the battery creates wrinkles on the surface of the battery, making it unsightly

Method used

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  • Lamination lithium ion battery and preparation method thereof
  • Lamination lithium ion battery and preparation method thereof
  • Lamination lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] see Figure 1-18As shown, the present embodiment provides a preparation process for laminated lithium-ion batteries, which mainly includes the following steps:

[0056] Step 101: lamination to obtain a laminated body.

[0057] In this step, the negative electrode sheet 1301 and the positive electrode sheet 500 are laminated to obtain a laminated cell body 801 . A separator layer is separated between any layer of the positive electrode sheet 500 and the negative electrode sheet 1301 in the obtained laminated electric core body 801 .

[0058] In this step, it can be realized by laminating a single positive electrode sheet 500 , a separator sheet, and a negative electrode sheet 1301 according to the prior art.

[0059] As an illustration of the implementation of this step, the inventor provides the following lamination technical solutions:

[0060] Put the positive electrode sheet 500 into the membrane bag to obtain the positive electrode sheet diaphragm bag, so that a ...

Embodiment 2

[0140] see Figure 13 As shown, the laminated lithium-ion battery of the lithium-ion battery provided in this embodiment includes: an arc-shaped laminated battery core body and an aluminum-plastic film casing. The structure and connections of each part are as follows:

[0141] For the structure of the arc-shaped laminated cell body, see Figure 14 As shown, the arc-shaped laminated cell body is composed of stacked naturally-shaped arc-shaped negative electrode sheets 1301 and positive electrode sheets 500. There is a natural arc-shaped diaphragm layer separated between any positive electrode sheet 500 and negative electrode sheet 1301. Each separator layer is bonded to the positive electrode sheet 500 and the negative electrode sheet 1301 adjacent to the separator layer respectively. The specific preparation process can be referred to the corresponding introduction in Example 1, but is not limited to.

[0142] For the structure of the aluminum-plastic film shell, see Figu...

Embodiment 3

[0153] This embodiment provides the laminated lithium-ion battery of the lithium-ion battery provided in this embodiment. Cooperating with the curvature of the arc of the arc-shaped laminated cell body, along the arc of the arc-shaped laminated cell body from the inside to the outside, the natural lengths of the positive electrode sheet 500 and the negative electrode sheet 1301 change from short to long, thereby obtaining an arc-shaped The two ends of the stacked cell body are flat, and the stacked body has a good and neat shape, which is further conducive to improving the specification consistency of the stacked lithium-ion battery.

[0154] Test comparative analysis:

[0155] In order to further illustrate the technical effect of the present embodiment, the comparative example of the same model specification and the comparative file test analysis of the embodiment of the present invention are described below:

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Abstract

The invention relates to the field of a lithium ion battery, and discloses a lamination lithium ion battery and a preparation method thereof. The preparation method comprises the following steps: various positive plates are loaded into various membrane barrier bags according to a loading process, thus obtaining various positive plate membrane barrier bags, wherein in the loading process, a first membrane barrier and a second membrane barrier are respectively placed at the top surface and the bottom surface of each positive plate, and at least two lengthwise edges of each first membrane barrier and each second membrane barrier are heat-sealed to form at least two discontinuous seals of heat sealing; a lamination cell body is acquired by laminating negative plates and the positive plates, the middle part of the lamination cell body is fixed, the lamination cell body is placed naturally at the top of an arc-shaped bracket, the various membrane barrier layers in the lamination cell body are respectively cohered with the positive plates and the negative plates on the membrane barrier layers by virtue of heat pressing of the lamination cell body; the arc-shaped lamination cell body is acquired by virtue of standing of the lamination cell body, and then is placed inside the hollow position of a cell body of an aluminium and plastic film shell body, the aluminium and plastic film shell body is heat-sealed, and the arc-shaped lamination cell body is encapsulated in the aluminium and plastic film shell body, so that the lamination lithium ion battery is acquired.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a method for preparing a laminated lithium ion battery and the battery. Background technique [0002] Due to the advantages of high energy density, high output voltage, and high output power, lithium-ion batteries are widely used. The current lithium-ion batteries are mainly in the shape of cylinders, squares, buttons, etc., but as the application of lithium-ion batteries continues to expand to various fields, other shapes of lithium-ion batteries are also receiving more and more attention, such as those used in pedometers battery, a curved lithium-ion battery is required. [0003] In the process of carrying out the research of the present invention, the inventor finds that there are at least the following problems in the prior art: [0004] The few bent lithium-ion batteries currently on the market are bent with fixtures after the battery is manufactured, which greatly dam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0585H01M10/0525
CPCY02E60/10Y02P70/50
Inventor 周晓玲何安轩殷振国
Owner SHENZHEN GREPOW BATTERY CO LTD
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