Positive plate diaphragm bag as well as a laminated lithium ion battery and manufacturing method thereof

A lithium-ion battery and positive electrode technology, applied in the field of lithium-ion batteries, can solve the problems of damaging the battery electrode and structure, reducing the electrochemical performance of the battery, and wrinkling the battery surface, so as to improve the capacity and avoid poor electrical performance. The effect of small solder joints

Inactive Publication Date: 2014-01-08
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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  • Positive plate diaphragm bag as well as a laminated lithium ion battery and manufacturing method thereof
  • Positive plate diaphragm bag as well as a laminated lithium ion battery and manufacturing method thereof
  • Positive plate diaphragm bag as well as a laminated lithium ion battery and manufacturing method thereof

Examples

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preparation example Construction

[0056] In the first aspect, a method for preparing a laminated lithium-ion battery provided in an embodiment of the present invention includes:

[0057] Laminating the negative electrode sheet and the positive electrode sheet to obtain a laminated electric core body, and there is a separator layer between any of the positive electrode sheets and negative electrode sheets in the laminated electric core body,

[0058] Fix the middle part of the laminated electric core body, place the laminated electric core body naturally on the top of an arc-shaped support, heat press the laminated electric core body on the arc-shaped support for a predetermined time, and make the laminated electric core body Each diaphragm layer in the cell body is bonded to the positive electrode sheet and the negative electrode sheet adjacent to the diaphragm layer;

[0059] Resting the laminated electric core body on the arc-shaped support until the laminated electric core body is shaped into an arc matchin...

Embodiment 1

[0157] see Figure 1-18 As shown, the present embodiment provides a preparation process for laminated lithium-ion batteries, which mainly includes the following steps:

[0158] Step 101: lamination to obtain a laminated body.

[0159] 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 . 1

[0160] 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.

[0161] As an illustration of the implementation of this step, the inventor provides the following lamination technical solutions:

[0162] Put the positive electrode sheet 500 into the membrane bag to obtain the positive electrode sheet diaphragm bag, so tha...

Embodiment 2

[0257] 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:

[0258] 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.

[0259] For the structure of the aluminum-plastic film shell, see Figu...

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Abstract

The invention relates to the field of lithium ion batteries and discloses a positive plate diaphragm bag as well as a laminated lithium ion battery and a manufacturing method thereof. A positive plate diaphragm bag comprises a first diaphragm layer, a second diaphragm layer and positive plates, the first diaphragm layer and the second diaphragm layer directly face the top surface and the undersurface of each positive plate respectively, and edges, exceeding the positive plates, of the first diaphragm layer and the second diaphragm layer are connected together by laser spot welding. By applying the technical scheme, improving of product appearance and electrochemical performance is facilitated.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a positive electrode sheet diaphragm bag, a laminated lithium-ion battery and a preparation method. 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 man...

Claims

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Application Information

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IPC IPC(8): H01M2/18H01M10/0525H01M10/058H01M50/466
CPCY02E60/122H01M10/0525H01M10/058H01M2220/30H01M50/463Y02E60/10Y02P70/50
Inventor 周晓玲何安轩殷振国
Owner SHENZHEN GREPOW BATTERY CO LTD
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