Preparation method of laminated lithium-ion battery and battery

A lithium-ion battery and lamination technology, which is applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of damaging the battery pole piece and structure, wrinkling the battery surface, and reducing the electrochemical performance of the battery.

Inactive Publication Date: 2013-09-11
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, redu

Method used

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  • Preparation method of laminated lithium-ion battery and battery
  • Preparation method of laminated lithium-ion battery and battery
  • Preparation method of laminated lithium-ion battery and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] see Figure 1-18 As shown, the present embodiment provides a preparation process for laminated lithium-ion batteries, which mainly includes the following steps:

[0062] Step 101: lamination to obtain a laminated body.

[0063] 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 .

[0064] 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.

[0065] As an illustration of the implementation of this step, the inventor provides the following lamination technical solutions:

[0066] Put the positive electrode sheet 500 into the membrane bag to obtain the positive electrode sheet diaphragm bag, so that a...

Embodiment 2

[0146] 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:

[0147] 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.

[0148] For the structure of the aluminum-plastic film shell, see Figu...

Embodiment 3

[0159] 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.

[0160] Test comparative analysis:

[0161] 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 preparation method of a laminated lithium-ion battery and the battery. The preparation method comprises the following steps of: loading each positive plate into a diaphragm bag according to the following bag loading process to obtain a positive plate diaphragm bag, wherein the bag loading process is as follows: a first diaphragm and a second diaphragm are respectively arranged on the top surface and the bottom surface of each positive plate, and at least one wide end of each of the first diaphragm and the second diaphragm is thermally sealed; laminating a negative plate diaphragm bag and the positive plate diaphragm bag to obtain a laminated cell body, fixing the middle part of the laminated cell body, naturally placing the laminated cell body to ensure that each diaphragm layer inside the laminated cell body is bonded with adjacent positive plate and negative plate of the diaphragm layers; standing the laminated cell body to obtain an arc laminated cell body; placing the arc laminated cell body into a cell body concave position of an aluminum-plastic film shell to be thermally sealed with an aluminum-plastic film, and packaging the arc laminated cell body into the aluminum-plastic film shell to obtain the laminated lithium-ion battery.

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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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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