A heat-sealing process of aluminum-plastic film for lithium-ion battery

A lithium-ion battery and aluminum-plastic film technology, which is applied in the manufacture of battery pack components, non-aqueous electrolyte batteries, and electrolyte batteries, can solve problems such as inconsistent heat-sealing strength, easy wrinkling of aluminum-plastic film edges, and poor flatness. , to achieve the effect of good heat sealing strength, smooth surface and uniform thickness

Active Publication Date: 2017-03-15
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems that the heat-sealed aluminum-plastic film edge is prone to wrinkles, poor flatness and inconsistent heat-sealing strength in the heat-sealing process of the aluminum-plastic film of the lithium-ion battery in the prior art, and provides a lithium-ion battery aluminum Plastic film heat-sealing process, the process steps are simple, and the aluminum-plastic film after heat-sealing has good edge sealing and heat-sealing strength

Method used

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  • A heat-sealing process of aluminum-plastic film for lithium-ion battery
  • A heat-sealing process of aluminum-plastic film for lithium-ion battery
  • A heat-sealing process of aluminum-plastic film for lithium-ion battery

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Embodiment 1

[0031] A lithium-ion battery aluminum-plastic film heat-sealing process, comprising top sealing and side sealing the aluminum-plastic film, wherein the top sealing of the aluminum-plastic film includes the following steps:

[0032] (1) One-time top sealing: Based on the determined optimal top sealing process parameters, the heat sealing pressure is reduced by 30% (0.245Mpa) on the basis of the optimal top sealing pressure, and the heat sealing temperature is based on the optimal top sealing temperature 12% (224°C), the heat sealing time is reduced by 40% (1.8S) on the basis of the optimal top sealing time, and the first top sealing is performed on the aluminum-plastic film of the lithium-ion battery, that is, a top sealing is completed.

[0033] (2) Secondary top sealing: Based on the determined optimal top sealing process parameters, the heat sealing pressure is increased by 20% (0.42 Mpa) on the basis of the optimal top sealing pressure, and the heat sealing temperature is at...

Embodiment 2

[0038] A lithium-ion battery aluminum-plastic film heat-sealing process, comprising top sealing and side sealing the aluminum-plastic film, wherein the top sealing of the aluminum-plastic film includes the following steps:

[0039] (1) Primary top sealing: Based on the determined optimal top sealing process parameters, the heat sealing pressure is reduced by 45% (0.1925MPa) on the basis of the optimal top sealing pressure, and the heat sealing temperature is based on the optimal top sealing temperature The temperature is increased by 5% (210°C), and the heat-sealing time is reduced by 20% (2.4S) on the basis of the optimal top-sealing time, and the first top-sealing is performed on the aluminum-plastic film of the lithium-ion battery, that is, a top-sealing is completed.

[0040] (2) Secondary top sealing: Based on the determined optimal top sealing process parameters, the heat sealing pressure is increased by 40% (0.49MPa) on the basis of the optimal top sealing pressure, and ...

Embodiment 3

[0045] A lithium-ion battery aluminum-plastic film heat-sealing process, comprising top sealing and side sealing the aluminum-plastic film, wherein the top sealing of the aluminum-plastic film includes the following steps:

[0046] (1) Primary top sealing: Based on the determined optimal top sealing process parameters, the heat sealing pressure is reduced by 33% (0.2345MPa) on the basis of the optimal top sealing pressure, and the heat sealing temperature is based on the optimal top sealing temperature The temperature is increased by 7% (214°C), and the heat-sealing time is reduced by 23% (2.31S) on the basis of the optimal top-sealing time. The first top-sealing is performed on the aluminum-plastic film of the lithium-ion battery, that is, a top-sealing is completed.

[0047] (2) Secondary top sealing: Based on the determined optimal top sealing process parameters, the heat sealing pressure is increased by 24% (0.434MPa) on the basis of the optimal top sealing pressure, and th...

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Abstract

The invention discloses a lithium-ion battery aluminum-plastic film heat-sealing process, which solves the problem that in the prior art lithium-ion battery aluminum-plastic film heat-sealing process, the edge sealing of the aluminum-plastic film after heat sealing is prone to wrinkles, poor flatness, and heat-sealing strength. Inconsistent issues. The aluminum-plastic film heat-sealing process of the present invention includes carrying out top sealing and side sealing to the aluminum-plastic film, carrying out top sealing to the aluminum-plastic film includes primary top sealing and secondary top sealing, and carrying out side sealing to the aluminum-plastic film includes primary side sealing and Secondary side seal. The present invention adopts step-by-step top sealing and step-by-step side sealing on the basis of the determined optimal top sealing process parameters and optimal side sealing process parameters, and adjusts and optimizes the process parameters of each step top sealing and side sealing , which effectively solves the problem that the existing aluminum-plastic film is prone to wrinkles and poor flatness after one-time top sealing and side sealing, and it will also cause the completely melted CPP layer material to be extruded from the aluminum-plastic film, resulting in inconsistent heat-sealing strength. , the aluminum-plastic film obtained by the invention has smooth surface, uniform thickness and good heat-sealing strength.

Description

technical field [0001] The invention relates to the technical field of manufacturing lithium-ion batteries, in particular to a heat-sealing process for aluminum-plastic films of lithium-ion batteries. Background technique [0002] Aluminum-plastic film is the outer packaging material for soft-pack lithium batteries. The commonly used aluminum-plastic film structures are as follows: figure 1 As shown, it is mainly composed of extended nylon layer 1 (ON layer), aluminum foil layer 2 (AL layer) and cast polypropylene film layer 3 (CPP layer) from top to bottom. When making soft-pack lithium-ion batteries The aluminum-plastic film needs to be heat-sealed with a heat-sealing machine to form the outer package. The quality of the heat-sealing will directly affect the service life of the battery. [0003] The heat sealing of the aluminum plastic film includes top sealing and side sealing. The so-called top sealing is to heat seal the side of the aluminum plastic film on the side (u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M2/02
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 董峰吴赛舟史离全
Owner WANXIANG 123 CO LTD
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