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Head and soft roll lithium ion battery package method by employing same

A lithium-ion battery and sealing head technology, which is applied to small-sized batteries/battery packs, large-sized batteries/battery packs, secondary batteries, etc., can solve the problems of degassing packaging and false sealing, and achieve the guaranteed packaging effect, The packaging effect is better and more reliable, and the effect of increasing the contact area

Inactive Publication Date: 2019-04-02
HUNAN LIFANG NEW ENERGY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to develop a new sealing head and packaging method to solve the problem of false sealing during degassing packaging

Method used

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  • Head and soft roll lithium ion battery package method by employing same
  • Head and soft roll lithium ion battery package method by employing same
  • Head and soft roll lithium ion battery package method by employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 1~2 As shown, this embodiment provides a head, including a base 1, a head body 2 installed on the base 1, and limit blocks 3 located at both ends of the head body 2, and the sealing surface of the head body 2 is provided with waves tooth. Such as Figure 9 As shown, the spacing L of the wave teeth 1 0.1~0.3mm. Depth D of wave teeth 1 0.05~0.2mm. The wave teeth form an ∠α with the length direction of the head main body 2, and ∠α is 90°. The height difference between the upper surface of the limiting block 3 and the sealing surface of the head body 2 is twice the product of the thickness of the aluminum-plastic film and the deformation rate, and the deformation rate is 20-75%.

[0039] This embodiment also provides a soft pack lithium-ion battery packaging method using the head described in this embodiment, including the following steps:

[0040] Step 1, using the sealing head described in this embodiment to package the soft-pack lithium-ion battery...

Embodiment 2

[0043] Such as Figure 3~4 As shown, this embodiment provides a head, including a base 1, a head body 2 installed on the base 1, and limit blocks 3 located at both ends of the head body 2, and the sealing surface of the head body 2 is provided with waves tooth. Such as Figure 9 As shown, the spacing L of the wave teeth 1 0.1~0.3mm. Depth D of wave teeth 1 0.05~0.2mm. The wavy teeth form an angle of ∠α, ∠α or 30-45° with the length direction of the main body 2 of the head. The height difference between the upper surface of the limiting block 3 and the sealing surface of the head body 2 is twice the product of the thickness of the aluminum-plastic film and the deformation rate, and the deformation rate is 20-75%.

[0044] This embodiment also provides a soft pack lithium-ion battery packaging method using the head described in this embodiment, including the following steps:

[0045] Step 1, using the sealing head described in this embodiment to package the soft-pack lith...

Embodiment 3

[0048] Such as Figure 5~6 As shown, this embodiment provides a sealing head, which includes a base 1, a sealing head body 2 installed on the base 1, and limiting blocks 3 located at both ends of the sealing head body 2. Teeth. Such as Figure 10~11 As shown, the pitch L of the mesh teeth 2 0.1~0.3mm. Depth D of mesh teeth 2 0.05~0.2mm. The textured teeth form a ∠β with the length direction of the main body 2 of the head, and ∠β is 45°. The area S of the tooth head of the mesh tooth is 0.002~0.04mm 2 . The height difference between the upper surface of the limiting block 3 and the sealing surface of the head body 2 is twice the product of the thickness of the aluminum-plastic film and the deformation rate, and the deformation rate is 20-75%.

[0049] This embodiment also provides a soft pack lithium-ion battery packaging method using the head described in this embodiment, including the following steps:

[0050] Step 1, using the sealing head described in this embodime...

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Abstract

The invention belongs to the technical field of lithium ion battery production, and particularly relates to a head. Te head comprises a base, a head main body installed on the base and limit blocks located at two ends of the head main body, and the package surface of the head main body is provided with wave teeth or mesh teeth. The present invention further provides a soft roll lithium ion batterypackage method by employing the same. The method comprises the following steps of: the step 1, employing the head to perform primary package of a soft roll lithium ion battery to form a seal region having raised grains or mesh patterns; and the step 2, employing a conventional flat head to perform secondary package of the lithium ion battery to form a flat seal region. Compared to the prior art,the head can generate seal with raised grains or mesh patterns to effectively squeeze out electrolyte in the seal region to the two sides of the seal region so as to ensure the package effect.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery production, and in particular relates to a sealing head and a soft-pack lithium-ion battery packaging method using the sealing head. Background technique [0002] Soft-pack lithium batteries have the advantages of high energy density, good cycle performance, no explosion, flexible design, etc., and are the future development direction of power batteries. [0003] The traditional degassing and packaging process of soft-pack lithium batteries is a one-time flat head packaging, that is, the head of the degassed package is a flat head, and the seal is also flat, and then the edge is folded. However, due to the existence of the electrolyte, during degassing and packaging, some free residues will form a liquid film at the seal, which will prevent the melting between the two layers of aluminum-plastic film pp layers, and it is prone to false seals. The width of the power battery seal is relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/058H01M10/0525H01M50/10
CPCH01M10/0525H01M10/058H01M50/10Y02E60/10Y02P70/50
Inventor 朱登伟
Owner HUNAN LIFANG NEW ENERGY SCI & TECH
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