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Soft package battery and preparation method thereof

A technology of soft-pack batteries and batteries, which is applied to battery components, chemical instruments and methods, circuits, etc., and can solve problems such as increasing the production cost of soft-pack batteries

Pending Publication Date: 2021-04-02
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a pouch battery and its preparation method to solve the problem of improving the waterproof performance of the battery by using a plastic casing for the existing pouch battery, and the plastic casing will increase the production cost of the pouch battery

Method used

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  • Soft package battery and preparation method thereof
  • Soft package battery and preparation method thereof
  • Soft package battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 2 Schematic diagram of the structure of the aluminum-plastic film provided in this embodiment; image 3 A partial structural schematic diagram of a pouch battery provided in this embodiment; Figure 4 A partial structural schematic diagram of another pouch battery provided in this embodiment; Figure 5 for Figure 4 Enlarged view of the left end of the middle packaging part; Figure 6 A schematic structural diagram of another pouch battery provided in this embodiment; Figure 7 for Figure 6 Schematic diagram of the experimental results of the aluminum plastic film structure compared with the existing technology; Figure 8 A schematic structural diagram of another pouch battery provided in this embodiment; Figure 9 A schematic structural diagram of yet another pouch battery provided in this embodiment.

[0053] Such as image 3 As shown, this embodiment provides a pouch battery, including a battery cell 100 and an aluminum-plastic film 200 covering the ...

Embodiment 2

[0074] On the basis of Embodiment 1, this embodiment provides a method for preparing a pouch battery, so that the thickness of the PP layer at the end of the packaging part away from the battery cell is smaller than the thickness of the PP layer at the end of the packaging part facing the battery cell, thereby improving the performance of the pouch battery. waterproof performance.

[0075] The preparation method of the pouch battery provided in this embodiment includes: providing a cell and an aluminum-plastic film, and punching the aluminum-plastic film to form a pit for accommodating the cell. It is easy to understand that the shape and size of the pit are the same as that of the cell. Matching, place the battery inside the pit.

[0076] After the aluminum-plastic film is folded in half, the edges of the upper and lower layers of aluminum-plastic film are thermally sealed by using a head. Exemplarily, the head includes an upper head and a lower head, two layers of aluminum-...

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Abstract

Embodiments of the invention provide a soft package battery and a preparation method thereof. The soft package battery provided by the invention comprises a battery cell and aluminum-plastic films, wherein the battery core is positioned between an upper-layer aluminum-plastic film and a lower-layer aluminum-plastic film; each aluminum-plastic film comprises a nylon layer, an aluminum layer and a PP layer which are arranged in a stacked mode, and the edges of the two layers of aluminum-plastic films are packaged in a hot melting mode to form a packaging part so as to allow the PP layers of thetwo layers of aluminum-plastic films to form an integrated structure; and the thickness of the PP layers at one end, away from the battery cell, of the packaging part is smaller than the thickness ofthe PP layer at the end, towards the battery cell, of the packaging part. The invention also provides the preparation method of the soft package battery. The preparation method comprises the followingsteps: providing the battery cell and the aluminum-plastic films; and packaging the edges of the two layers of aluminum-plastic films in a hot melting mode through an upper sealing head and a lower sealing head, wherein the packaging face of the upper sealing head forms a step face or an inclined face, and the packaging face of the lower sealing head and the packaging face of the upper sealing head are symmetrical along a horizontal plane. According to the soft package battery provided by the invention, the waterproof performance of the soft package battery is improved on the premise of not increasing production cost.

Description

technical field [0001] Embodiments of the present invention relate to lithium-ion battery technology, and in particular to a pouch battery and a preparation method thereof. Background technique [0002] With the development of science and technology, more and more electronic products have entered all aspects of people's lives, and the normal use of electronic products is inseparable from batteries. Among them, soft pack batteries have the advantages of good safety performance, light weight, and large capacity. , are widely used in electronic products in various fields. [0003] In the prior art, the soft-pack battery includes a battery cell and an aluminum-plastic film casing covering the battery cell. During long-term use, water ingress in the aluminum-plastic film may cause the battery cell inside the aluminum-plastic film to fail. In order to prevent water Passing through the aluminum-plastic film shell leads to the failure of the battery cell. Usually, the waterproof le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/105H01M50/124H01M50/141B32B15/20B32B15/088B32B15/085B32B15/09B32B27/34B32B27/36B32B27/32
CPCB32B15/20B32B15/088B32B15/085B32B15/09B32B27/34B32B27/36B32B27/32B32B2307/7265Y02E60/10
Inventor 王烽李素丽李俊义
Owner ZHUHAI COSMX BATTERY CO LTD
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