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Thermal runaway—the ignition or explosion of a battery cell attributable to a self-reinforcing heating course of—might be attributable to a spread of inside and exterior elements, reminiscent of overcharging, extreme discharging, harm, or heating of the battery. Thermal runaway releases not solely flames and sizzling gases but in addition electrically conductive particles. These in flip may cause thermal propagation in adjoining cells and result in brief circuits.
Battery-makers are steadily rising the vitality density of their batteries, and Freudenberg Sealing Applied sciences tells us that this will likely truly enhance the chance of thermal runaway. Freudenberg has developed thermal limitations that assist to decelerate thermal runaway by rising resistance to propagation.
“What is totally new is that the thermal limitations at the moment are additionally obtainable in personalized, versatile 3D geometries, which makes it potential to make use of them in varied positions inside the battery and permits for integration of extra parts,” says Andrew Espinoza, World VP Know-how of the Oil Seals Powertrain & Driveline Division at Freudenberg.
Along with the prevailing two-dimensional limitations, reminiscent of flat mats and thermal blankets, customer-specific 3D geometries might be produced in a wide range of high- and low-volume manufacturing processes, reminiscent of injection molding and steady extrusion. Profile seals, module separators and covers—together with these for bus bars, cooling traces or electrical parts—are just a few of the merchandise presently being produced. Freudenberg says the advanced 3D geometries are light-weight and have minimal impression on the battery’s general weight.
“The three-dimensional thermal limitations and the utilized supplies have gone via intensive testing that exceeds the required requirements,” says Andrew Espinoza. “They’ve confirmed their excellent efficiency and reliability on bench assessments in addition to battery system testing. The merchandise meet the best high quality requirements, are licensed pursuant to UL 94 V-0 and are already getting used efficiently in preliminary collection manufacturing for the automotive business.”
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