Extraction post-treatment device and diaphragm extraction process thereof

The extraction aftertreatment device comprises a box body, an inlet end mold passing opening is formed in one end of the box body, an outlet end mold passing opening is formed in the other end of the box body, liquid used for achieving liquid sealing on a battery diaphragm is contained in the box body, a liquid sealing baffle is further arranged at the same time, and the liquid sealing baffle is arranged in the box body. The bottom end of the liquid sealing baffle extends into liquid for liquid sealing, the internal space of the whole box body is divided into a front space and a rear space, the inlet end mold passing opening is in butt joint with the extraction tank film outlet, and the front space formed between the inlet end mold passing opening and the liquid sealing baffle forms a closed-loop space structure; a micro negative pressure generating device is arranged in a rear space formed between the outlet end mold passing opening and the liquid seal baffle, and micro negative pressure is formed in a rear