Battery pole piece die cutting device and die cutting method thereof

The invention provides a battery pole piece die cutting device and a die cutting method thereof.The battery pole piece die cutting device comprises an upper die and a lower die, the upper die comprises an upper die top plate, an upper die plate, an upper die middle plate and a material pressing plate, a die cutting punch is arranged at the bottom of the upper die middle plate, a die cutting groove is formed in the material pressing plate, the die cutting punch can do lifting motion along the die cutting groove, and the lower die comprises a die cutting base plate and a lower die plate; the die cutting base plate and the lower die plate are each provided with a discharging groove, the discharging grooves sequentially penetrate through the die cutting base plate and the lower die plate, and discharging bases are arranged in the discharging grooves. During die cutting, the upper die starts to descend, the upper die drives the material pressing plate and the die cutting punch to descend at the same time, firstly,