A battery module, including a frame body, a plurality of bare cells, a sealing assembly and a cooling assembly. The frame body internally has an accommodating space. The bare cells are arranged in the accommodating space. The sealing assembly is connected to the frame body, and is configured to…

The present disclosure provides a secondary battery and a preparation method thereof, a positive electrode plate, a negative electrode plate and an electrically-powered device. A positive electrode active material includes a lithium iron phosphate (LFP) positive electrode material, LiNiOand LiFeO…