Battery detection device, battery detection method and system

The invention provides a battery detection device, a battery detection method and a battery detection system. Relates to the field of battery detection. The battery detection device comprises a first controller, a first image acquisition device and a battery placement platform for placing a battery to be detected; the first image acquisition device is mounted at a preset position of the battery transfer cart so as to acquire a three-dimensional image of a battery to be detected; the first controller is used for determining the first image acquisition device corresponding to a target battery placement area as a target image acquisition device according to the target battery placement area in the battery replacement information, and controlling the target image acquisition device according to a motion control signal of the battery transfer cart; the target image acquisition device is used for acquiring a three-dimensional image of the to-be-detected battery while the battery transfer cart moves, and the first controller is used for analyzing the three-dimensional image of the to-be-detected battery to obtain a battery detection result, and the battery detection result comprises state information of the to-be-detected battery. According to the invention, the safety of the battery in the battery replacement process can be improved.