TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The weld lines comprise a welding gun vertical rail (21), a welding gun slide way, a welding gun card mold, a welding gun slide block, a welding gun wire conveyor belt and a welding gun. The welding gun vertical rail is a mounted in the card mold with a welding gun. The welding gun card mold is set with a slide way with a welding gun. The welding gun slide way is mounted with a welding gun slide block. The welding gun slide block is matched with the welding gun. The turntable mechanism comprises a rotating disk, a clamp, a guide column, a turntable motor, a shaft, a gear, a fluted disc and a fixed disk, where the rotary shaft and the rotary motor is matched with each other. The turntable motor is mounted in the turntable gear. The rotary gear is connected with the rotary fluted disc. The rotary fluted disc is mounted in the lower part of upper turntable. The upper turntable is connected with a clamp. The upper turntable lower part is connected with the fixed disk. The rotary fluted disc is set with a fluted disc with multiple teeth. The guide column is set on the upper part of rotary mounting shaft. The clamp comprises a rail wheel, a clamp clamping pole, a wheel, a box body, clapboard, a rotating cylinder, a rotating shaft, a top wheel arm and the top wheel shaft, where the box body inner part is mounted with multiple clapboards. The clamp clamping pole one end is connected with the mounting rail wheel. The clamp clamping pole other end is matched with the rotating cylinder. The rotating cylinder is mounted on the rotating shaft. The rotating cylinder is set with a top wheel arm, which is set with a top wheel shaft. The top wheel shaft is connected with the top wheel. The groove mechanism comprises a vertical top rail, a support and a jacking block, which is connected with the vertical rail on the top block. There are 2 vertical top rails. The vertical top rail lower part is connected with the multiple mounting blocks. The upper part of box body two sides are connected with two partition board shafts, which is connected with the partition board. Preferred Method: The clustering of envelope and clamping of cluster comprises placing thin film through mesh into a coated film groove, then placing the cluster in a coating groove, achieving thin film, using machinery hand for wrapping film and placing in a clamp, and completing clamping of cluster. The finishing of cluster clamping comprises moving up and down the cluster through the rotating turntable along the track wheel of guide rail column, and clamping top wheel by the clamp. The clustering of battery groove comprises clamping the top block of cluster through the cluster block corresponding to downward-top direction, and clustering battery groove.