Pouch lithium battery anti-thermal-radiation aluminum foil pouch forming die and manufacturing method thereof

Abstract

The invention discloses a pouch lithium battery anti-thermal-radiation aluminum foil pouch forming die and a manufacturing method thereof. The pouch lithium battery anti-thermal-radiation aluminum foil pouch forming die comprises a cylindrical foil pouch forming die and a square foil pouch forming die, wherein the cylindrical foil pouch forming die comprises an airbag, a secondary sealing area, atop sealing area and a battery cell holding pit body; the airbag has a depth of 1-2 mm; the battery cell holding pit body and the airbag are arranged symmetrical about the central axis of the cylindrical foil pouch forming mold; the secondary sealing area is arranged between the battery cell holding pit body and the airbag; the top sealing area is arranged on the other two sides between the battery cell holding pit body and the airbag. The cylindrical aluminum foil pouch forming die or the square foil pouch forming die can selectively conveniently improve the aluminum foil at the front end ofthe process as long as the airbag is extended to the rear end of the aluminum foil pouch. A square or cylindrical airbag pit can well prevent the heat from being transferred to a middle area when having a depth of about 1 to 2 mm. The aluminum foil pouch forms an opening of 1-2mm when folded in half and bent, thereby facilitating liquid injection.

Description

Technical field: [0001] The invention belongs to the technical field of production of a heat-radiation-proof aluminum foil bag for a soft-pack lithium battery, and in particular relates to a forming mold for a heat-radiation-proof aluminum foil bag for a soft-pack lithium battery and a manufacturing method thereof. Background technique: [0002] Soft pack lithium battery aluminum foil bag is a composite flexible packaging material composed of base material (such as nylon), aluminum foil, sealing layer (such as polypropylene) and adhesive. As a lithium battery packaging material, aluminum-plastic film must have several times good heat sealing performance, insulation, mechanical strength and ductility, and must also have very high stability to water and oxygen in the air and corrosive acid-base salts inside the battery. Sex, his design and manufacture is one of the main technical problems in the lithium battery industry. [0003] Soft-pack lithium batteries are sealed by soft...

AI Technical Summary

Problems solved by technology

[0003] Soft-pack lithium batteries are sealed by soft sealing (silica gel strip) or hard sealing (metal direct contact). The temperature is generally 180-280 ° C. Although the packaging effect is good, it also brings infrared radiation Light (below 300°C) heat transfer; the factors that control the packaging effect are nothing more than temperature and time. In the short packaging time of a few seconds, infrared light will cause the unsealed area to stick; for lithium battery injection, secondary sealing and vacuuming and The follow-up process of the battery brings a lot of inconvenience, so the present invention proposes a heat-radiation-proof aluminum foil bag forming mold for a soft-packed lithium battery and its manufacturing method

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