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A lithium battery and cell technology, applied in the direction of adhesives, adhesive types, film/sheet-like adhesives, etc. The effect of good wettability and strong adhesion
Pending Publication Date: 2022-03-15
SHENZHEN HORAE TECH
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[0003] However, the existing termination tape is inconvenient for fixing the cell, so a kind of expansion tape for lithium battery cell is proposed, the tape will expand when encountering the electrolyte, so that the cell can be fixed, replacing the existing termination tape
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[0026] Example: see figure 1 The shown expansion tape for lithium battery cells includes a base material and glue, and the inner surface of the base material is provided with glue.
[0027] Substrate: CPP, OPS, TPU, PLA, PO and other acid-resistant and degradable films are cast and coated; the thickness of the substrate is preferably between 10 and 50 μm.
[0028] Coating process: It consists of the preparation of coating liquid, coating liquid supply, film corona treatment, gravure coating, and drying system. The coating liquid needs to be stirred in the liquid supply tank for a period of time to make Coating liquid that can be used for coating, and the prepared coating liquid is pumped into the intermediate tank through the liquid supply pump;
[0029] After the polyester film is longitudinally stretched by the longitudinal stretching equipment, corona equipment is required to perform corona treatment on the surface of the film to increase the surface tension of the film an...
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Abstract
The invention relates to the technical field of adhesive tapes for lithium battery cells, in particular to an expansion adhesive tape for lithium battery cells, which comprises a base material and glue, the glue is arranged on the inner side surface of the base material, and the adhesive tape expands when encountering electrolyte, so that the cells can be fixed, and the existing termination adhesive tape is replaced. Compared with other surface treatment modes, the base material is formed by casting and coating non-acid-resistant and degradable films such as CPP, OPS, TPU, PLA and PO, off-line rewinding is not needed during coating, coating is carried out between longitudinal stretching and transverse stretching, a transverse stretching section is used as a drying oven to dry coating liquid, and the production efficiency is high; the coating is uniform, the coating is thinner than off-line coating, the coating effect is better, the coating cost can be obviously reduced, the surface tension of the film subjected to corona treatment is gradually attenuated along with time, the surface of the film subjected to coating treatment does not have the corona attenuation problem, and the acrylic acid glue is selected for coating, so that the adaptability is high, the drying speed is high, and the coating quality is high. The adhesive force to a base material is strong, and the leveling property and transparency are good.
Description
technical field [0001] The invention relates to the technical field of adhesive tapes for lithium battery cells, in particular to an expansion adhesive tape for lithium battery cells. Background technique [0002] Lithium battery tape mainly uses polyester film as the base material, and acrylic glue is coated on this base material, which is mainly used for the adhesion and protection of the aluminum-plastic film surface during the production process of soft pack batteries and polymer lithium batteries. High temperature resistance, no glue residue, scratch resistance, puncture resistance, the product complies with ROHS standards. The battery tab tape is the key insulating special tape for the production of battery tabs, and it is also the key material for the good quality of lithium polymer batteries. The lithium battery termination tape is based on polypropylene insulating materials (polypropylene Film, PP, PET, PI film) On this basis, it is coated with special acrylic glue...
Claims
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