DEEP-SEA BATTERY APPARATUS AND METHOD FOR ASSEMBLING DEEP-SEA BATTERY APPARATUS

A deep-sea battery apparatus and a method for assembling the deep-sea battery apparatus. The deep-sea battery apparatus includes a casing, an upper cover), a battery pack, a pressure compensation assembly, and a fastening plate assembly. The upper cover is sealingly connected to a top of the casing, the battery pack is disposed inside the casing, the pressure compensation assembly is disposed in the casing and on a side of the battery pack, and the fastening plate assembly is annular in shape and sealingly sleeved and connected at a connection between the casing and the upper cover.