Assembly line for assembling power battery of electric vehicle

The utility model relates to an electric automobile power battery assembly line which sequentially comprises two winding devices, a hot pressing/Hi-pot device, an X-Ray detection device, a battery cell combining/fixing glue pasting device, a positive and negative electrode welding device, a tab folding/support installing device, a film coating device, a battery cell shell entering device, a laser welding device and a helium detection device from right to left. Respectively winding the positive plate and the negative plate together to form a winding body and respectively conveying the winding body to a hot pressing/Hi-pot device; the hot-pressing/Hi-pot device is provided with conveying belts which are transversely arranged corresponding to the two winding devices respectively, the conveying belts convey winding bodies from the right end of the hot-pressing/Hi-pot device to the left end of the hot-pressing/Hi-pot device and continue to convey the winding bodies leftwards to the left end of the X-Ray detection