An apparatus for detecting tab folds, comprising: a first image obtaining module, configured to obtain a first image of a first lateral face of tabs of a battery cell; a second image obtaining module, configured to obtain a second image of a second lateral face of the tabs, wherein the second lateral face is different from the first lateral face; an image analyzer, configured to obtain, based on the first image, a first number of layers of the tabs corresponding to the first lateral face, and obtain, based on the second image, a second number of layers of the tabs corresponding to the second lateral face; and determine, based on at least one of the first number of layers or the second number of layers, whether the tabs are in a folded state, wherein the first image obtaining module comprises a first photographing device and a first zoom lens adjacent to the first photographing device, and the first photographing device is configured to shoot a plurality of first initial images of the first lateral face at different focal lengths in a case that the first zoom lens is zoomed for a plurality of times, and send the plurality of first initial images to the image analyzer; the second image obtaining module comprises a second photographing device and a second zoom lens adjacent to the second photographing device, and the second photographing device is configured to shoot a plurality of second initial images of the second lateral face at different focal lengths in a case that the second zoom lens is zoomed for a plurality of times, and send the plurality of second initial images to the image analyzer; and the image analyzer is configured to synthesize the plurality of first initial images into one first image and synthesize the plurality of second initial images into one second image by using a multi-frame image synthesis algorithm. a first image obtaining module, configured to obtain a first image of a first lateral face of tabs of a battery cell; a second image obtaining module, configured to obtain a second image of a second lateral face of the tabs, wherein the second lateral face is different from the first lateral face; an image analyzer, configured to obtain, based on the first image, a first number of layers of the tabs corresponding to the first lateral face, and obtain, based on the second image, a second number of layers of the tabs corresponding to the second lateral face; and determine, based on at least one of the first number of layers or the second number of layers, whether the tabs are in a folded state, wherein the first image obtaining module comprises a first photographing device and a first zoom lens adjacent to the first photographing device, and the first photographing device is configured to shoot a plurality of first initial images of the first lateral face at different focal lengths in a case that the first zoom lens is zoomed for a plurality of times, and send the plurality of first initial images to the image analyzer; the second image obtaining module comprises a second photographing device and a second zoom lens adjacent to the second photographing device, and the second photographing device is configured to shoot a plurality of second initial images of the second lateral face at different focal lengths in a case that the second zoom lens is zoomed for a plurality of times, and send the plurality of second initial images to the image analyzer; and the image analyzer is configured to synthesize the plurality of first initial images into one first image and synthesize the plurality of second initial images into one second image by using a multi-frame image synthesis algorithm.