HC Plastics News: As the sales of new energy vehicles continue to rise, the demand for lithium batteries has increased, and the demand for related materials has also increased. This also provides an excellent opportunity for the development of PBT alloy materials with extremely low warpage and high flame retardancy. In addition, lithium battery housings require materials with high heat resistance, strength and hardness, as well as excellent sliding properties, high wear resistance and good chemical resistance, which allows material experts LANXESS to explore More potential business opportunities.
LANXESS released PBT alloy material for new electric vehicle battery parts
Recently, LANXESS, a specialty chemical supplier, has released a new PBT (polybutylene terephthalate) alloy material, the PocanAF4130, for battery parts for electric vehicles. It is reported that the new composite alloy material was jointly developed by LANXESS and HELLA. It has extremely low warpage and high flame retardancy. It has been applied to a German small car loading battery management unit (BMU). ) and the housing of the dual battery detection unit (CMU).
The alloy of PBT and acrylonitrile-styrene-acrylate copolymer (ASA) contains 30% glass fiber and a halogen-based flame retardant. “The special advantage of PocanAF4130 material is that it has extremely low warpage and shrinkage, and high flame retardancy. We believe that this material has great application prospects in precision components of vehicle batteries.†LANXESS Marc Marbach, director of sales for the High Performance Materials (HPM) business unit, said. What's more commendable is that it took only two and a half years from the initial concept design to the large number of tests to the final full production.
Low deviation, excellent stability
The BMU and CMU housings have a large flat surface with complex edges and internal geometry. Thanks to the innovative design, the BMU and CMU housings enable individual parts to be injection molded, saving costs. When the housing is mounted on the PCB, the connector pins cannot be bent. Therefore, the dimensional tolerances between the connector connector and the pin jack must be small. MarcMarbach explained: "Based on this, the excellent size and stability of the PBT/ASA alloy of the PocanAF4130 can be used."
UL945VA and ULf1 certification
According to the UL94 fire test results of the American Safety Testing Laboratory, the LANXESS PocanAF4130 material has achieved the best V-0 (0.75mm) rating, which fully meets the strict requirements of the German small car lithium battery system application. Secondly, the material is UL-approved and meets the UL945VA (1.5mm) flame retardant rating and can be applied to injection molded parts of flame-retardant housing parts. In addition, it is ULf1 certified for use in outdoor applications where UV and water are resistant. “More than that, our composite alloy materials can also be used on electronic components such as photovoltaic plugs, sockets, etc.†added Marc Marbach.
Low volatility and emissions within the allowable range
Thermal desorption analysis according to VDA 278 (German Automotive Industry Association) shows that the surface of the thermoplastic is very low in emissions and can be used in many automotive applications, such as automotive interior parts for low volatility and tolerable emissions. Claim.
Good resistance to commonly used battery electrolytes
This composite alloy material is highly resistant to media commonly used in automobiles, such as fuels, lubricants, detergents and maintenance products. To this end, LANXESS has conducted a wide range of media storage tests for Hella, and the results show that the material meets the LV124 standard supply specifications recognized by many car manufacturers. In addition, this composite alloy material also exhibits good resistance to electrolytes commonly used in lithium batteries. “In addition, we performed load tests in accordance with DIN EN 22088-3. The results showed that the samples did not show significant cracks even after 1,000 hours of exposure,†says Marc Marbach.
Comprehensive HiAnt service
LANXESS provides a large number of service support for the development of the enclosure components, which is part of the HiAnt customer service package. For example, HPM advises on optimized component design, providing computer-aided design of all enclosure components and product performance data required for mold flow analysis to meet anticipated load requirements and aid in initial injection molding testing. In addition, LANXESS also determined the content of halides in composite alloy materials by ion chromatography and tested the odor of VDA270, which fully met the stringent standards. 
Editor in charge: Wang Ning 12
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