特殊化學(xué)品公司朗盛和德國海拉胡克集團(tuán)公司合作開發(fā)了一種名為Pocan AF4130的新型復(fù)合材料，用作電池管理單元（BMU）和兩個單元監(jiān)控單元（CMU）的外殼材料。
聚對苯二甲酸丁二醇酯（PBT）和丙烯酸酯-苯乙烯-丙烯腈（ASA）的共混物含有30％（按重量計算）的玻璃纖維和鹵素阻燃劑包。該材料的特殊優(yōu)點(diǎn)是其極低的翹曲和收縮，加上其高阻燃性。Lanxess高性能材料（HPM）業(yè)務(wù)部門的銷售總監(jiān)Marc Marbach表示：“我們認(rèn)為這種材料在汽車電池系統(tǒng)精密零部件的應(yīng)用潛力很大。”從最初的想法到廣泛的測試，再到可以用于全面的生產(chǎn)，只用了兩年半的時間。
海拉為德國汽車電池制造商生產(chǎn)BMU和CMU。目前這種非常平坦的設(shè)備正在德國小型車的鋰離子電池系統(tǒng)中使用。
圖 海拉為德國汽車電池制造商生產(chǎn)BMU和CMU
偏差低
BMU和CMU的外殼具有大的平坦表面以及具有復(fù)雜幾何形狀的邊緣和內(nèi)部。由于其創(chuàng)新的設(shè)計，BMU和CMU的外殼可以成本有效地作為單一組件注塑成型。當(dāng)外殼安裝在印刷電路板上時，連接器的接觸端不能混在一起。因此，連接器支架與插腳的切口之間的間距公差是非常接近的。“這正是我們的混合物Pocan AF4130出色的尺寸穩(wěn)定性所在?！盡arbach解釋說。
UL 94 5VA和UL f1
該材料在美國測試機(jī)構(gòu)保險商實(shí)驗(yàn)室公司的UL94防火測試中獲得了V-0（0.75毫米）的最佳阻燃等級。UL黃卡上也顯示該材料UL94防火等級為5VA（1.5mm）。
該材料用于阻燃外殼部件的注射成型。另外UL f1數(shù)據(jù)顯示，該材料還可用于涉及暴露于UV光線和水的戶外應(yīng)用中。Marbach補(bǔ)充說：“我們的復(fù)合材料也可用于光伏插頭和插座之類的電氣部件上。”
低揮發(fā)性和可容許范圍內(nèi)的排放量
Lanxess根據(jù)VDA 278標(biāo)準(zhǔn)（德國汽車工業(yè)協(xié)會）進(jìn)行的熱解吸分析所證明的，這種材料表面由熱塑性塑料制作成型，排放非常低。“因此，它也適用于需要非常低揮發(fā)性和可容許范圍內(nèi)排放的許多汽車應(yīng)用，例如汽車內(nèi)飾部。”Marbach表示。
對常見電池電解質(zhì)有良好的抵抗性
該混合物對機(jī)動車輛中使用的典型介質(zhì)（如燃料，油，清潔劑和汽車護(hù)理產(chǎn)品）具有很強(qiáng)的抵抗能力，這在Lanxess為海拉胡克進(jìn)行的廣泛的介質(zhì)儲存測試中得到證實(shí)，符合供應(yīng)規(guī)范LV 124，這一被許多汽車制造商認(rèn)定的標(biāo)準(zhǔn)。該材料還顯示出對廣泛用于鋰離子電池的電解質(zhì)的良好抗性，對此也按DIN EN22088-3進(jìn)行了負(fù)載測試。“樣品即使在1,000小時的曝光后也沒有明顯的裂縫，還可以使用?！盡arbach表示。
綜合性的HiAnt服務(wù)
Lanxess在研發(fā)外殼組件方面為海拉胡克提供了額外的支持。這些服務(wù)是HiAnt客戶服務(wù)包的一部分。例如，HPM提供了優(yōu)化組件設(shè)計的建議，提供所有外殼組件電腦輔助設(shè)計是需要的材料性能數(shù)據(jù)以滿足預(yù)期負(fù)載并進(jìn)行模流分析，幫助進(jìn)行起初的注塑成型試驗(yàn)。這家特種化學(xué)品公司進(jìn)一步通過離子色譜法為Hella確定了混合物中鹵化物含量，并對VDA 270進(jìn)行了氣味測試。
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LANXESS launches new PBT compound for battery components in electric cars Specialty chemicals company LANXESS has developed a new compound called Pocan AF4130 in collaboration with HELLA KGaA Hueck & Co., based in Lippstadt, Germany. It serves as a housing material for a battery management unit (BMU) and two cell monitoring units (CMU). The blend of polybutylene terephthalate (PBT) and acrylic ester-styrene-acrylonitrile (ASA) contains 30 percent by weight glass fibers and a halogen-based flame retardance package. “The particular advantages of the material are its extremely low warpage and shrinkage, combined with its high flame retardance. We see great potential for application in precision components for vehicle battery systems,” says Marc Marbach, head of Sales Segments E&E in the LANXESS High Performance Materials (HPM) business unit. It took just two-and-a-half years to go from the initial idea to extensive testing and finally to use in full-scale production. HELLA fabricates the BMU and CMUs for a German manufacturer of battery systems for motor vehicles. The very flat devices currently are used in the lithium-ion battery system of a German compact car. Low tolerances The housings of the BMU and CMUs have large, flat surfaces as well as complex geometries along the edges and on the inside. Thanks to their innovative design, they can be injection molded cost-effectively as single components. The contact pins for the connectors must not bend when the housings are mounted on the printed circuit boards. The tolerances for the spacing between the connector mounts and the cut-outs for the pins are therefore extremely close. “This is precisely where the outstanding dimensional stability of our blend Pocan AF4130 pays off,” explains Marbach. UL 94 5VA- and UL f1-listed As required for this application, the material achieves the best classification of V-0 (0.75 millimeters) in UL 94 fire testing by the U.S. testing organization Underwriters Laboratories Inc. It further is listed on the UL Yellow Card with a good classification of UL 94 5VA (1.5 millimeters). The material is destined for the injection molding of flame-retardant housing components. It additionally has been given a UL f1 listing for use in outdoor applications involving exposure to UV light and water. “Our compound thus has a good chance of also being used for electrical components such as photovoltaic plugs and sockets,” says Marbach. Low volatile and condensable emissions Surfaces made of this thermoplastic are very low-emission, as demonstrated by thermal desorption analyses conducted by LANXESS in accordance with VDA 278 (German Association of the Automotive Industry). “It is therefore also suitable for many motor vehicle applications requiring very low volatile and condensable emissions, such as components for the automotive interior,” says Marbach. Good resistance to common battery electrolytes The blend is highly resistant to typical media used in motor vehicles, such as fuels, oils, cleansers and car care products, as proven in extensive media storage tests conducted by LANXESS for HELLA in accordance with the supply specification LV 124, used by many automotive manufacturers. It also displays good resistance to an electrolyte widely used in lithium-ion batteries. The corresponding test was additionally conducted under load in compliance with DIN EN 22088-3. “No cracks were evident in the samples even after 1,000 hours of exposure,” explains Marbach. Comprehensive HiAnt services LANXESS provided HELLA with extensive support in developing the housing components. These services are part of its HiAnt customer service package. For example, HPM delivered suggestions for optimal component design, provided all the characteristic material data required for the computer-aided design of the housing parts to meet expected loads and for the mold flow analyses, and supported the initial injection molding trials. The specialty chemicals company further determined the blend’s halogenide content for HELLA by means of ion chromatography and conducted odor testing to VDA 270. |
英文信息來源：https://lanxess.com/，艾邦高分子編輯整理。
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