SLR11 series safety door switch: 

1. Designed with high-strength plastic structure, it can withstand the tensile force of more than 1300N, without heavy metal pollution poisoning battery materials, and at the same time meet the ISO 13849-1 PL e grade.

2. The door lock key shall be treated with high-strength coating to avoid other metal elements in the alloy from polluting the battery process.

3. The door lock has the function of emergency unlocking on the back, and the lock head of the door lock body adopts circular three-hole design, which supports the padlock function. 

The scheme has been successfully applied to many high-end lithium battery production lines. Its innovative metal-free design and multiple safety protection mechanisms not only meet the strict requirements of lithium battery manufacturing for cleanliness, but also reach the highest international safety standards.