Detection method and detection device for electrode assembly

The embodiment of the invention provides an electrode assembly detection method and device, and the method comprises the steps: obtaining at least one target image of an electrode assembly in a winding process, the target image comprises a subimage of a first region and a subimage of a second region, the electrode assembly in the first area is at least partially overlapped with the electrode assembly in the second area in the radial direction of the electrode assembly after being rolled; and according to the at least one target image, determining the dislocation quantity of the anode pole piece and the cathode pole piece of the electrode assembly. According to the detection scheme of the electrode assembly provided by the embodiment of the invention, the accuracy of dislocation quantity detection of the anode plate and the cathode plate of the electrode assembly can be improved.