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Method for verifying package reliability of soft-package battery

A soft pack battery, reliability technology, applied in secondary batteries, climate sustainability, non-aqueous electrolyte batteries, etc., can solve the large difference in composite technology and material properties, can not explain the packaging effect, can not characterize the soft pack Lithium-ion battery packaging life and other issues, to achieve the effect of intuitive testing and simple operation

Inactive Publication Date: 2016-05-18
SHANDONG GOLDENCELL ELECTRONICS TECH
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Problems solved by technology

In the process of continuous development of soft-packed lithium-ion batteries, the aluminum-plastic film composite materials and tabs with glue for the outer packaging of soft-packed lithium-ion batteries are becoming more and more diverse. The outer layer of the aluminum-plastic composite film is made of polyamide fiber or polyethylene terephthalate. It is made of ethylene glycol formate, and the composite process and material properties vary greatly between the composite layers. Different materials need to correspond to different thermal packaging processes, which requires good stability of incoming materials and equipment stability at the same time, and large Some manufacturers' incoming materials and equipment cannot have good stability at the same time, and a slight change in them will affect the packaging reliability of the soft-pack lithium-ion battery, which will inevitably affect the safety performance and service life of the battery
[0003] In the manufacture of soft-pack lithium-ion batteries, each change of aluminum-plastic film material needs to be verified by matching incoming materials, processes and equipment. During the production of soft-pack lithium-ion batteries, the measurement of package thickness only represents the thermal deformation of the aluminum-plastic film. It cannot explain the packaging effect, and cannot characterize the life of the outer packaging of the soft-packed lithium-ion battery

Method used

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  • Method for verifying package reliability of soft-package battery

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Embodiment

[0024] like figure 1 As shown, first cut the Japanese DNPD-ND408 aluminum-plastic film material to a size of (120±1)*(300±1) mm, and then fold the cut aluminum-plastic film in half into (120±1)*(150± 1) mm size. At the same time, prepare tabs with glue, the specification of the positive tab is (Al) 0.2*20*9(3)*38, the specification of the negative tab is (Ni) 0.2*20*9(3)*38, the positive and negative tabs are Wrap the short end of the tab tab with high-temperature tape, fix it on one side of the aluminum-plastic film, and heat seal it with a top-sealing device. The joint between the top seal and the positive tab tab is marked as a 1 , the connection part between the top seal and the negative tab is marked as a 2 , heat sealing temperature 180 ℃, pressure 0.3Mpa, time 6S, seal width 6.0 ± 0.5mm. The other side of the aluminum-plastic film is heat-sealed with a side sealer, the heat-sealed part is marked as b, the heat-seal temperature is 180°C, the pressure is 0.3Mpa, the ti...

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Abstract

A method for verifying package reliability of a soft-package battery comprises steps as follows: firstly, an aluminum-plastic film material is cut and then folded, one side is packaged by adhesive tab pieces, the other side is subjected to direct side seal, then a certain amount of electrolyte is injected, high-temperature placement is performed after packaging, liquid-state heat seal is performed close to the folded part, high-temperature placement is performed again, finally, package tension is detected by a detection piece with the width being 15 mm plus / minus 1 mm, and a battery package is judged to be qualified when the tension is larger than or equal to 34.5 N. The matching feasibility of aluminum-plastic films with tab materials, technologies and equipment can be characterized quickly, directly and actually with the method.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a method for verifying the packaging reliability of soft pack batteries. Background technique [0002] With the wide application of soft-pack lithium-ion batteries in the power field and the continuous maturity of soft-pack lithium-ion battery technology, people have put forward more stringent requirements for soft-pack lithium-ion batteries, especially the safety and use of soft-pack lithium-ion batteries. life. In the process of continuous development of soft-packed lithium-ion batteries, the aluminum-plastic film composite materials and tabs with glue for the outer packaging of soft-packed lithium-ion batteries are becoming more and more diverse. The outer layer of the aluminum-plastic composite film is made of polyamide fiber or polyethylene terephthalate. It is made of ethylene glycol formate, and the composite process and material properties vary greatly between ...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525G01L5/00
CPCG01L5/00H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 关成善宗继月张敬捧王勇李涛
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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