Box type lithium battery heat dissipation device

The box type lithium battery heat dissipation device comprises a box body, a partition plate is fixedly arranged at the top in the box body, a piston is arranged above the partition plate, a first sliding block is fixedly arranged on the bottom face of the piston, the first sliding block is transversely and slidably connected to the top face of the partition plate, and push rods are fixedly arranged on the left side and the right side of the piston correspondingly; the push rod is slidably sleeved with a guide pipe, the guide pipe is fixedly arranged on the box body in a penetrating mode, and the push rod extends to the outer side of the box body; and the top of the left side and the top of the right side of the box body are each provided with a first ventilation hole, the first ventilation holes are located above the partition plate, and the tops of the left side and the right side of the inner wall of the box body are each provided with a baffle for covering the first ventilation holes. The air box is drive