NOVELTY - Coated film groove welding device comprises a welding line (2), a groove transmission belt (3), a groove coated auxiliary mechanism, a turntable mechanism (5) and a groove mechanism, where the groove mechanism is mounted on the turntable mechanism one side. The turntable mechanism is connected with the groove coated auxiliary mechanism. The groove coated auxiliary mechanism comprises a coated film groove, a machinery hand support, a transverse motor, a cluster conveying belt, lengthways motor and a handle. The machinery hand support is mounted in the transverse electrical machine.    USE - Used as coated film groove welding device.    ADVANTAGE - The device can increase the degree of automation, assures practical processing arrangement, and can increase the production efficiency.    DETAILED DESCRIPTION - Coated film groove welding device, comprises a welding line (2), a groove transmission belt (3), a groove coated auxiliary mechanism, a turntable mechanism (5) and a groove mechanism, where the groove mechanism is mounted on the turntable mechanism one side. The turntable mechanism is connected with the groove coated auxiliary mechanism. The groove coated auxiliary mechanism comprises a coated film groove, a machinery hand support, a transverse motor, a cluster conveying belt, lengthways motor and a handle. The machinery hand support is mounted in the transverse electrical machine. The transverse motor is mounted with lengthways motor, where the lengthways motor lower part is set with a mounting claw. The cluster conveying belt is mounted in the coated film multiple grooves. The battery of groove conveyor belt is mounted on the turntable mechanism lower part, which is matched with one end of groove belt welding line groove. The turntable mechanism is connected to the groove mechanism and its lower part is connected with the battery groove conveyor belt (7). An INDEPENDENT CLAIM is also included for the coated film groove welding method, comprising (i) clustering envelope, (ii) clamping cluster, (iii) finishing clamping group, (iv) transporting plastic groove, (v) installing cluster in a battery groove, (vi) discharging from battery groove, (vii) flame welding, and (viii) battery switch sequencing, where the clustering envelope comprises placing thin film in a coated film groove, placing the cluster in a coating groove, and achieving thin film; clamping cluster comprises wrapping the cluster of packing film into a clamp; finishing clamping group comprises clamping guide rail column through the clamp; transporting plastic groove comprises transporting to the set position through battery slot conveyor belt; installing cluster in a battery groove comprises setting a groove mechanism through a group assembled in the clamp into a groove in the battery groove; discharging from battery groove comprises delivering packed battery groove into the weld line via conveyor belt; flame welding comprises using welding gun card mold for flame welding in the welding line; battery switch sequencing comprises welding battery and entering into manufacturing process.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the coated film groove welding device.    Welding line (2)    Groove transmission belt (3)    Turntable mechanism (5)    Battery groove conveyor belt (7)    Welding gun vertical rail (21)