Leakage during battery case inspection

Vacuum Technology in Lithium-Ion Batteries:

As one of the energy storage devices, lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium-ion batteries. The shapes of lithium batteries include variable pouch batteries, as well as cylindrical and prismatic batteries with fixed shapes.

Lithium batteries are used in various end products that require long-term energy storage. Due to their light weight and high energy density, they are particularly commonly used in devices such as smartphones, tablets, laptops, mobile communication devices, and electric vehicles. For example, the large-capacity lithium-ion batteries currently under development are also beginning to be tested in electric vehicles. Lithium batteries will become one of the main power sources for electric vehicles in the 21st century and will be applied in artificial satellites, aerospace, and energy storage. Regardless of the type, vacuum technology is required in multiple stages of the lithium battery production process.

Reasons Why Lithium Batteries Need Leak Detection:

An ordinary lithium-ion battery cell is composed of a positive electrode, a negative electrode, a separator, and an electrolyte. These cells are arranged inside the packaging. Due to the highly reactive chemical properties of lithium metal, the processing, storage, and use of lithium metal have extremely high requirements for the environment. For lithium batteries, leak detection is mainly required at the welding joints of the casing. If the electrolyte inside the lithium battery leaks out due to the poor sealing of the casing, it can react violently with a humid environment, not only causing serious harm to the environment and personnel but also affecting the service life of the equipment. Therefore, in the assembly and sealing process of lithium batteries (cylindrical and prismatic cells are sealed by welding), leak testing is necessary. According to the production process, you can choose the helium mass spectrometer leak detector or the helium leak detection system.