The invention provides a tab correcting device, comprising a material placing seat, a first correcting block, a second correcting block and a driving
assembly, wherein a material placing groove is formed in the material placing seat; the first correcting block is arranged on one side of the material placing seat; the second correcting block is arranged on the other side of the material placing seat, and the second correcting block and the first correcting block are symmetrically arranged; and the driving
assembly is adjacent to the material placing seat, connected with the first correcting block and the second correcting block and used for driving the first correcting block and the second correcting block to get close to each other or get away from each other. The material placing seat isarranged, the first correcting block and the second correcting block are symmetrically arranged on the two sides of the material placing seat, and the driving
assembly drives the first correcting block and the second correcting block to move, so tabs at the two ends of a
battery cell are smoothened, and bending is avoided; and the first correcting block and the second correcting block are symmetrically arranged, so a roll core can be moved to the center of the material placing seat, which is beneficial for subsequent accurately-positioned material taking and accurately-positioned material placing of the
battery cell, prevention of deflection, reduction in a reject and improvement of production benefits.