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US 12,592,434 B2Granted
Apparatus and method for shaping pouch film for secondary batteries
AssigneeLG Energy Solution, Ltd.
InventorsJeong Woo Hong, Sang Wook Kim, Sung Chul Park, Dong Hyeuk Park
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Abstract
Disclosed are a pouch film shaping apparatus including a preheating lamp configured to preheat a metal barrier layer of a pouch film in order to increase stretching force of the pouch film and a pouch film shaping method.
Claims7
A pouch film shaping apparatus comprising:
- a supply unit configured to supply a pouch film comprising an outer coating layer including a polymer, an inner sealant layer including polypropylene, and a metal barrier layer disposed between the outer coating layer and the inner sealant layer;
- a preheating lamp configured to use mid-infrared light having a wavelength range of 2 μm to 4 μm to directly preheat a pouch cup formation portion of the metal barrier layer for 1 to 4 seconds and thereby to preheat the pouch film to 40° C. to 70° C. while preventing damage to the outer coating layer;
- and
- a shaping unit configured to shape the pouch cup formation portion of the metal barrier layer by stretching, the preheating lamp being disposed prior to an entrance of the shaping unit,
- wherein the preheating lamp is configured to preheat only an area equivalent to 100% to 120% of the area of the pouch cup formation portion, and
- wherein the preheating lamp is located ahead of the shaping unit in the advancing direction, spaced apart from the shaping unit by 20 mm to 40 cm.
3 more elements
A pouch film shaping method comprising:
- supplying a pouch film to a pouch film shaping apparatus, the pouch film comprising an outer coating layer including a polymer, an inner sealant layer including polypropylene, and a metal barrier layer disposed between the outer coating layer and the inner sealant layer;
- directly preheating a pouch cup formation portion of the metal barrier layer for 1 to 4 seconds and thereby preheating the pouch film to 40° C. to 70° C. using a preheating lamp using mid-infrared light having a wavelength range of 2 μm to 4 μm, while preventing damage to the outer coating layer;
- and
- shaping the preheated pouch cup formation portion by stretching in a shaping unit, the preheating being before the pouch film enters the shaping unit,
- wherein the preheating lamp preheats only an area equivalent to 100% to 120% of the area of the pouch cup formation portion, and
- wherein the preheating lamp is located ahead of the shaping unit in the advancing direction, spaced apart from the shaping unit by 20 mm to 40 cm.
3 more elements
Dependencies are inferred from the claim text.