Encapsulation method for electric core of flexible packing lithium battery
A packaging method and technology for lithium batteries, which are applied in battery pack parts, circuits, electrical components, etc., can solve problems such as bulging, lithium battery leakage, and falling off, and achieve the effects of improving service life, convenient operation and simple process.
Inactive Publication Date: 2009-07-08
SHENZHEN B&K TECH
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- Description
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Problems solved by technology
During heat sealing and welding, the inner PP and PE layers melt alternately, and by pressing, the liquid colloid will seep into the packaging film and form small rubber balls. After cooling or bending the side, the small rubber balls will It will break or fall off from the inside of the composite film, causing the inner aluminum foil to directly contact with the corrosive electrolyte, which will damage the sealing of the lithium battery, cause the lithium battery to leak and bulge, and be scrapped
Method used
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Embodiment 1
[0023] Example 1: Paste several layers of 0.01 mm thick adhesive tape (or a substitute similar to the adhesive tape) on the side of the side sealing jig close to the core, and then heat-press the side seal, and compare the indentation of the soft-packed lithium battery with the standard film , select the 0.05 mm standard to meet the requirements.
[0024] The heat-sealing jigs involved in the present invention are known technologies.
[0025] The heat-sealing temperature, time, pressure etc. that the present invention relates to are all known technologies.
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A encapsulation method of soft packaging lithium cell core, hot sealing weld the face and the side of the soft packaging film which coats the lithium cell core, the concrete steps are following: the soft packaging film is clashed to groove with definite depth; the coil core is placed in the groove; the distance between the sealing weld to coil core is 0.05-0.5 mm; Hot sealing weld the soft packaging film. By adjusting the position of the sealing weld, the method realizes without leakage, and increase the service life of product.
Description
technical field [0001] The invention belongs to a manufacturing method of a lithium battery, in particular to a packaging method of a soft-packaged lithium battery cell. Background technique [0002] At present, among various types of lithium batteries, soft-pack lithium batteries are widely used in various digital electronic products due to their advantages of high energy density, light weight, and self-defined shape. In the production process of flexible packaging lithium batteries, it is necessary to heat-seal the front and side of the flexible packaging film containing lithium batteries, so as to achieve the purpose of sealing the flexible packaging lithium batteries. The flexible packaging film used for the production of lithium batteries is a five-layer composite film, usually with a layer of aluminum foil in the middle, and two layers of PE and PP on both sides. The PP and PE layers are fused with the inner PP and PE layers of another composite film to fuse the two c...
Claims
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IPC IPC(8): H01M2/02H01M50/138
CPCY02E60/10
Inventor 龙梅梁百胜蓝俊方
Owner SHENZHEN B&K TECH
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