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Packaging method for high-capacity polymer lithium ion cells

A lithium-ion battery and packaging method technology, applied in the field of lithium-ion batteries, can solve the problems that the battery thickness cannot exceed 12mm, limit the geometric volume of the battery, etc., and achieve the effects of ensuring electrical performance, reducing length requirements, and reducing damage rate

Inactive Publication Date: 2017-11-24
海口博澳国兴新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the depth of the punching bag, the thickness of polymer lithium-ion batteries produced in batches is generally difficult to exceed 12mm, and it is difficult to exceed 18mm in small batches. This greatly limits the geometric volume of the battery. If the battery is made into a 100Ah Such a large capacity cannot be achieved

Method used

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  • Packaging method for high-capacity polymer lithium ion cells
  • Packaging method for high-capacity polymer lithium ion cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Take a 100Ah lithium iron phosphate polymer lithium-ion battery, the size of which is: length 330mm, width 460mm, thickness 8.5mm; the battery packaging method specifically includes the following steps:

[0066] (1) Punching bags: Punching two aluminum-plastic films with a length of 480mm, a width of 660mm and a thickness of 0.152mm with the same punching die, the depth h of the punching bag is 4.1mm, and the 4 plane corner R 0 The radius of the punching bag is 8mm, and the fillet R on the punching bag 1 and fillet under punching bag R 2 The radius is 2mm.

[0067] (2) Packing: put the battery into the pocket of one piece of aluminum-plastic film, and cover another piece of aluminum-plastic film on the top of the pocket.

[0068] (3) Top heat sealing: Since the length of the top edge of the battery is greater than 500mm, the top heat sealing is performed several times. A top sealing machine with a head length of 500mm and a width of 8mm is used to heat the head to 22...

Embodiment 2

[0072] Take a 200Ah ternary lithium polymer lithium-ion battery, the size of which is: 500mm in length, 700mm in width, and 5.5mm in thickness; the battery packaging method specifically includes the following steps:

[0073] (1) Punching bags: Take two aluminum-plastic films with a length of 540mm, a width of 1200mm, and a thickness of 0.152mm. Since the thickness of the battery is less than 6mm, only one of them is punched with a stamping die. The depth of the punching bag is h is 5.2mm, and the four plane corners R of the punching bag 0 The radius is 10mm, and the fillet R on the punching bag 1 and fillet under punching bag R 2 The radius is 1mm.

[0074] (2) Bagging: put the battery into the mouth of the aluminum-plastic film with a punched bag, and cover another piece of aluminum-plastic film over the mouth of the bag correspondingly.

[0075] (3) Top heat sealing: Since the length of the top sealing side of the battery is greater than 500mm, the top heat sealing is per...

Embodiment 3

[0079] Take a 300Ah ternary lithium polymer lithium-ion battery. The size of the battery is: 435mm in length, 780mm in width, and 10.5mm in thickness; the battery packaging method specifically includes the following steps:

[0080] (1) Punching bags: two aluminum-plastic films with a length of 480mm, a width of 1200mm and a thickness of 0.152mm are punched with the same punching die, the depth h of the punched bag is 5.1mm, and the 4 plane corner R 0 The radius of the punching bag is 20mm, and the upper fillet R of the punching bag 1 and fillet under punching bag R 2 The radius is 3mm.

[0081] (2) Packing: put the battery into the pocket of one piece of aluminum-plastic film, and cover another piece of aluminum-plastic film on the top of the pocket.

[0082] (3) Top heat sealing: Since the length of the top side of the battery is greater than 500mm, the top heat sealing is performed several times. A top sealing machine with a head length of 500mm and a width of 8mm is used...

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Abstract

The invention discloses a packaging method for high-capacity polymer lithium ion cells. The packaging method comprises the following steps: (1) a bag is formed from at least one of two aluminum plastic films by stamping; when the thickness of a cell is smaller than 6 mm, one bag is formed from one aluminum plastic film by stamping, and when the thickness of a cell is larger than or equal to 6 mm, bags are formed from the two aluminum plastic films by stamping; (2) the cell is loaded into an opening of the bag formed from one aluminum plastic film by stamping, and the opening of the bag is correspondingly covered with the other aluminum plastic film; (3) three edges of the cell are sealed in a hot manner with seal heads. With adoption of the packaging method for the high-capacity polymer lithium ion cells, the breakage rate of the aluminum plastic films is reduced, the aluminum plastic film use efficiency is increased, and electrical performance of the high-capacity polymer lithium ion cells can be guaranteed effectively; the packaging method is simple to operate.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a packaging method for a single high-capacity polymer lithium-ion battery. Background technique [0002] At present, the liquid sealing method for small-capacity polymer lithium-ion batteries mainly includes aluminum-plastic packaging film bagging, core filling, bag closing, top sealing, and side sealing. After completing one packaging process, it can enter the next process. Usually, the depth of punching the bag is up to 6mm when making the bag. Generally, double bags are folded in half or a single bag is folded in half with no bag area. The thickness of the suitable battery is less than 12mm. With the development of small capacity technology to large capacity, the length of battery side seal and top seal is generally only up to 300mm. According to such a size, a large-capacity battery is made, and the lithium iron phosphate lithium-ion battery is calculated accor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0525
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 程建聪
Owner 海口博澳国兴新能源科技有限公司
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