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Battery and preparation method thereof

A technology of batteries and batteries, which is applied in the field of batteries and their preparation, can solve the problems of reducing battery energy density and increasing the length of battery cells, so as to reduce the loss of energy density, increase energy density, and avoid the effect of contact short circuit

Pending Publication Date: 2020-12-22
浙江锂威能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One object of the present invention is to provide a battery that solves the problem of increasing the length of the battery cell and reducing the energy density of the battery due to the exposed size of the ear glue of the existing battery

Method used

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  • Battery and preparation method thereof
  • Battery and preparation method thereof

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Experimental program
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Embodiment 1

[0034] Such as Figure 1~2 As shown, a battery includes a cell 1 and a packaging film 2 for packaging the cell 1. At least one end of the cell 1 is electrically connected to a tab 3, and one end of the tab 3 is exposed to the packaging film 2. The tab 3 There is a tab glue 3 between the packaging film 2, the end of the tab glue 3 away from the cell 1 is flush with the edge of the packaging film 2 or is located in the packaging film 2, and the packaging film 2 is on the outer edge of the package with the tab 3 Covered with insulating glue 6. The encapsulation film 2 may be an aluminum-plastic film, or other encapsulation materials, but is not limited thereto. And when the packaging film 2 is an aluminum-plastic film, it is necessary to avoid the situation that the tab 3 is in contact with the aluminum layer and conducts.

[0035] Further, the area where the tab 3 and the packaging film 2 are packaged is the sealing area 5, the distance between the end of the sealing area 5 aw...

Embodiment 2

[0040] A method for preparing a battery, comprising the steps of:

[0041] S1. Die the encapsulation film 2 to shape it; that is, punch the encapsulation film 2 into an encapsulation film 2 with a groove 21 according to the size of the battery cell 1, and the groove 21 is used to hold the battery cell 1;

[0042] S2, coating the outer edge of the packaging film 2 and the tab 3 with insulating glue 6;

[0043] S3, put the battery cell 1 into the packaging film 2 processed in step S2, wherein a tab glue 3 is arranged between the tab 3 and the packaging film 2, and the end of the tab glue 3 away from the battery 1 is connected to the packaging film 2 The edges of the battery are flush or placed in the packaging film 2; then top sealing and side sealing are performed to complete the preparation of the battery.

[0044] When installing the battery cell 1 into the packaging film 2, it is necessary to optimize the battery cell 1 first. One embodiment can keep the size of the origina...

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PUM

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Abstract

The invention provides a battery, and the battery comprises a battery cell with tabs; a packaging film which is used for packaging the battery cell, wherein one end of the tab is exposed out of the packaging film; tab glue which is arranged between the tab and the packaging film, wherein one end, far away from the battery cell, of the tab glue is flush with the edge of the packaging film or is positioned in the packaging film. and the outer edge of the packaging film, which is packaged with the tab, is coated with insulating glue. Compared with the prior art, the battery has the advantages that the arrangement of exposed tab glue of the packaging film is omitted, the mode of coating the insulating glue is adopted to replace the tab glue of the part, and through the improved design, the problem of contact short circuit of the tab and the metal layer of the packaging film is solved, meanwhile, the additional length of the battery cell is reduced, and the energy density of the battery cell is improved. In addition, the invention also provides a preparation method of the battery.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a battery and a preparation method thereof. Background technique [0002] As a new type of secondary battery, lithium battery has the advantages of high energy density and power density, high working voltage, light weight, small size, long cycle life, good safety, and environmental protection. Energy, electric transportation power supply and other aspects have broad application prospects. Lithium-ion batteries are mainly divided into cylindrical batteries, square batteries and soft pack batteries according to their shapes, while cylindrical batteries and square batteries are also called hard shell batteries. Compared with hard-shell batteries, soft-pack batteries have the advantages of flexible design, lighter weight, low internal resistance, less explosion, more cycle times, and high energy density. Therefore, soft-pack batteries will occupy a higher proportion of the market in...

Claims

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Application Information

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IPC IPC(8): H01M2/34H01M2/26H01M10/058H01M10/052
CPCH01M10/052H01M10/058Y02E60/10Y02P70/50
Inventor 蔡培彬于子龙胡本安陈杰杨山李载波项海标
Owner 浙江锂威能源科技有限公司