How to design differentiated Lithium Battery Safety Valves for different types of lithium batteries?

Designing differentiated Lithium Battery Safety Valves for different types of lithium batteries, such as cylindrical, square, and pouch batteries, is an important way to meet their specific safety needs. This requires us to have a deep understanding of the structural characteristics, working principles, and application scenarios of each type of battery, in order to develop targeted design solutions.

For cylindrical lithium batteries, their structure is compact and the sealing requirements are high. Therefore, the design of the safety valve should pay attention to the tight fit with the battery cap and precise control of the opening pressure. We adopt a special sealing structure and opening mechanism to ensure that gas can be quickly and reliably released when the internal pressure of the battery reaches the preset value, while maintaining the overall sealing performance of the battery without being affected. In addition, in response to the high energy density characteristics of cylindrical batteries, we have optimized the material selection and manufacturing process of safety valves to enhance their high temperature resistance, corrosion resistance, and other performance.

Square lithium batteries have a large volume and relatively good heat dissipation conditions, but they also have strict requirements for the sealing performance and opening pressure of safety valves. In the design process, we fully considered the structural characteristics and application scenarios of square batteries, adopting a more stable sealing structure and an easy to install opening mechanism. At the same time, we have also strengthened the durability and reliability of the safety valve to address the challenges that square batteries may face, such as external impacts and vibrations.

The most significant feature of soft pack lithium batteries is that the outer shell is soft and deformable. Therefore, when designing safety valves, we need to pay special attention to their compatibility and sealing with the soft pack casing. We use flexible materials to make the sealing part of the safety valve and ensure that it can maintain a stable sealing effect even when the battery deforms. At the same time, in response to safety risks such as overcharging and short circuits that soft pack batteries may face, we have also optimized and adjusted the opening pressure and response speed of the safety valve to ensure timely release of internal pressure and prevent further deterioration of the situation in case of abnormal battery conditions.