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A battery casing is formed of a flame-retardant thermoplastic composition that includes a blend of a homopolymer, copolymer and ammonium polyphosphate.
The ammonium polyphosphate is in an amount to impart flame-retardance to the retardance to the thermoplastic composition. Other components include polyol, intumescent char-forming agent, and melamine, which acts as a blowing agent. Antioxidants, release agents, carbon black, reinforcers and other additives can be included.
Alternatively, the battery casing includes a polymer composition with a halogen-containing fire-retardant component and a polypropylene component.
Polypropylene also is available in two flame-retardant formulations. Both offer the best overall fire-resistant qualities of any competitive FRP material. This flame resistance, however, does not come at the expense of aesthetics and high performance.
Polypropylene has a high melting point compared to similarly weighted plastics. It is used in making automobile battery casing
Global EV flame retardant pp battery cover market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
LG Chem develops fire retardant plastic for EV batteries New material has the longest flame blocking duration. The South Korean parent of the world’s second largest EV battery manufacturer, LG Energy Solution (LGES), said the new material has the longest flame blocking duration in the world.
LG Chem said in-house tests showed the material ’prevented flame propagation for over 400 seconds above 1,000 degrees, 45 times longer than general flame-retardant plastics’, which would provide more time for the safe evacuation of vehicle occupants in the case of a battery fire.
The material is also said to have superb dimensional stability, maintaining its shape despite extreme temperature changes.
LG Chem said thermal runaway is a main cause of fire in electric vehicle batteries, which occurs when battery cells suffer stresses from various sources causing overvoltage and over discharge short circuits. Fires start once the cell’s internal temperature rises above a certain level.
