BATTERY, ELECTRIC DEVICE, AND WELDING DEVIATION DETECTING DEVICE AND METHOD

A welding deviation detection device includes a pre-welding addressing mechanism (4) that can determine relative position relations between location holes (131) and a plurality of poles (121a) in a battery 1, and send the relative position relations to a welding mechanism (5) and a post-welding detection mechanism (6); the welding mechanism (5) that can detect first positions of the location holes (131), and determine first positions of the plurality of poles (121a) based on the first positions of the location holes (131) and the relative position relation, so that the welding mechanism (5) can accurately weld a bus assembly (14) to the plurality of poles (121a) based on the first positions of the plurality of poles (121a) to form a plurality of welds; and the post-welding detection mechanism (6) that can detect second positions of the location holes (131) and positions of the plurality of welds, and detect welding deviation situations of the bus assembly (14) and the poles (121a) based on the second positions of the location holes (131), the positions of the plurality of welds and the relative position relations. The bus assembly (14) and the plurality of poles (121a) can be welded accurately through the welding mechanism (5), and the welding deviation situations can be detected simply, conveniently and timely through the post-welding detection mechanism (6). In addition, a welding deviation detection method, a battery and a power utilization device are also provided.