Batteries are used across a wide range of fields — from everyday IT devices to electric vehicles and ESS. Today, it is almost impossible to imagine life without batteries. To ensure the safety of our daily lives, SAMSUNG SDI places the highest priority on securing battery safety. 

One of SAMSUNG SDI’s key technologies is ‘EDI (Enhanced Direct Injection)’, which helps prevent thermal propagation in ESS. In the event of a fire, EDI directly sprays a fire extinguishing agent onto the affected module, lowering the temperature of the cells and blocking the spread of flames to adjacent cells. 

ESS products embedded with the EDI technology have been recognized for their safety by UL (Underwriters Laboratories), a global safety certification organization. SAMSUNG SDI met the UL9540A test standards for safe installation of ESS. This certification allows SAMSUNG SDI’s ESS products to be installed without the need for separate firefighting systems.

[SAMSUNG SDI’s safety technology is continuously evolving]

Another safety technology is ‘No-TP (No Thermal Propagation)’ technology. No-TP is a comprehensive technology designed to prevent thermal propagation within battery cells, modules, and packs. By utilizing a ‘thermal propagation prediction program’, optimal structural designs can be developed to prevent thermal propagation. SAMSUNG SDI’s No-TP technology is not only applied to cell designing but also to a module and pack assembly process.

A key feature of the No-TP design is the insulation sheet placed between cells when assembling modules. This sheet is designed based on a thermal propagation prediction program, which determines appropriate insulation sheets according to the predicted total heat generation of each cell. It physically blocks heat transfer to adjacent cells when the temperature of a specific cell rises. 

[SAMSUNG SDI’s No-TP design to prevent thermal propagation]

A structural characteristic of prismatic batteries also contributes to effectively blocking thermal propagation. The stacking method applied to prismatic batteries helps reduces internal pressure within the cell as microscopic gaps between stacked layers allow generated gases to disperse. 

Safety components are also applied to battery cells. One representative example is the vent, which is used in both cylindrical and prismatic cells. It rapidly releases gases generated within the cell to the outside, dispersing energy outward. SAMSUNG SDI designs the vent to ensure that the energy is discharged in a consistent direction and minimizes the risk of thermal propagation. 

[Structural safety of SAMSUNG SDI’s prismatic batteries]

SAMSUNG SDI strives to ensure safety from the battery cell design. In particular, we are developing safety technologies for each specific application and will continue to enhance them through ongoing research and development.