JOFR intelligent tightening tools play a crucial role in multiple key links of power battery assembly. In cell module assembly, they can achieve constant torque tightening to ensure uniform force on all cells. In module fixing and busbar connection, servo electric tightening tools can provide powerful and precise torque output, ensuring the module does not loosen under the vibration and impact of vehicle operation. Meanwhile, they guarantee the torque accuracy and consistency of busbar connections, avoiding problems such as increased contact resistance. In the sealing link of the upper cover and lower shell, the tightening tools can perform tightening according to a specific sequence and precise torque, ensuring uniform force on the gasket and achieving IP67 and above dustproof and waterproof performance.