CN115139600B - 一种电池防护用复合防隔热套及其制备方法 - Google Patents
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Abstract
本发明提供了一种电池防护用复合防隔热套,由内到外分为四层,第一层为导热硅橡胶,第二层为四氟乙烯网格布,第三层陶瓷化阻燃硅橡胶,第四层为芳纶毡层。本发明提供的电池防护用复合防隔热套可防止尖锐物件的划伤;在充电过程中防隔热套快速散热;当出现某一块电池失效发生爆炸燃烧时产生800‑1000℃的明火情况下,复合防隔热套不发生爆炸裂解,火焰不蔓延至相邻区域电池。本发明同时提供了上述复合材料的制作方法。
Description
技术领域
本发明涉及一种电池防护用的热防护材料。
背景技术
近年来随着电动汽车凭借清洁无污染的优势取得了广泛发展与应用,但亦暴露了电池燃烧整车被烧毁的现象。根据市场要求,需要研发一种在电池失效爆炸时产生800-1000℃的明火情况下,复合防隔热套不发生爆炸裂解,火焰不蔓延至相邻区域的防护材料。同时,在正常使用时防护套还要能防止尖锐物件的划伤,且在充电过程中防隔热套能够实现快速散热。
发明内容
本发明要解决的技术问题是提供一种电池防护用复合防隔热套及其制备方法,复合防隔热套能够在电池失效爆炸时产生800-1000℃的明火情况下不发生爆炸裂解,火焰不蔓延至相邻区域;同时,在正常使用时防护套可防止尖锐物件的划伤,在充电过程中防隔热套可实现快速散热。
为解决上述技术问题,本发明关于电池防护用复合防隔热套的技术方案是:一种电池防护用复合防隔热套,由内到外分为四层,第一层为导热硅橡胶,第二层为四氟乙烯网格布,第三层陶瓷化阻燃硅橡胶,第四层为芳纶毡层。
在上述技术方案中,导热硅橡胶能够对电池充电或使用过程中产生的热量进行散热,防止热量堆积;四氟乙烯网格布作为骨架材料可以增强防隔热套的力学强度,其网格状也便于热量的散发;陶瓷化阻燃硅橡胶在常温下具有与普通聚合物相同的性能,但遭遇高温着火后会形成陶瓷化产物,且能承受一定的冲击力,足以抵抗1000℃明火的烧蚀并保持制品的完整性;最外层的芳纶毡层具有防刺功效,能防止陶瓷化阻燃硅橡胶被扎破损,保持结构的完整性,同时还能起到一定的力学强度。
因此,本发明提供的电池防护用复合防隔热套可防止尖锐物件的划伤;在充电过程中防隔热套快速散热;当出现某一块电池失效发生爆炸燃烧时产生800-1000℃的明火情况下,复合防隔热套不发生爆炸裂解,火焰不蔓延至相邻区域电池。
优选地,导热硅橡胶的厚度为0.4-0.6mm,四氟乙烯网格布的厚度为0.4-0.6mm,陶瓷化阻燃硅橡胶的厚度为1.4-1.6mm,芳纶毡层的厚度为0.2-0.3mm。
优选地,导热硅橡胶的厚度为0.5mm,四氟乙烯网格布的厚度为0.5mm,陶瓷化阻燃硅橡胶的厚度为1.5mm,芳纶毡层的厚度为0.25mm。
本发明制备上述电池防护用复合防隔热套的方法包括以下工艺步骤:
①采用导热硅橡胶压制成胚型;
②根据胚型外形尺寸裁剪四氟乙烯网格布;
③对搭接部位采用钠萘溶液处理;
④将处理过的四氟乙烯网格布在胚型上套装;
⑤采用陶瓷化阻燃硅橡胶压制成型;
⑥在陶瓷化阻燃硅橡胶外表面粘接芳纶毡。
其中,步骤①是采用导热硅橡胶通过模压在180℃的模具内固化成型。
其中,制备步骤③中的钠萘溶液处理方法为:
(1)将一定量的金属钠加入到四氢呋喃与萘的溶液中,其中金属钠的质量分数控制在3%-5%,在室温下搅拌约2h,直至溶液颜色呈现深褐色或黑色即可;
(2)将待处理四氟乙烯须处理的部位浸入到该溶液中约5-10min,取出再用丙酮溶液浸泡3-5min;
(3)从丙酮溶液中取出工件,用清水漂洗干净后置于阴暗处自然干燥;
(4)选择有机硅树脂做粘合剂,均匀涂于处理过的待粘接表面并立即粘接,于80℃下烘烤2h后即完成粘接。
附图说明
图1为本发明实施例的防护套结构示意图;
附图标记为:
1——导热硅橡胶层 2——四氟乙烯网格布
3——陶瓷化阻燃硅橡胶层 4——芳纶毡层。
具体实施方式
为了便于本领域技术人员的理解,下面结合实施例与附图对本发明作进一步的说明,实施方式提及的内容并非对本发明的限定。
如图1所示,本发明关于电池防护用复合防隔热套的优选实施例是:一种电池防护用复合防隔热套,由内到外分为四层,第一层为导热硅橡胶1,第二层为四氟乙烯网格布2,第三层陶瓷化阻燃硅橡胶3,第四层为芳纶毡层4;导热硅橡胶1的厚度为0.5mm,四氟乙烯网格布2的厚度为0.5mm,陶瓷化阻燃硅橡胶3的厚度为1.5mm,芳纶毡层4的厚度为0.25mm。
上述电池防护用复合防隔热套的制作方法包括以下工艺步骤:
①采用导热硅橡胶通过模压在180℃的模具内固化成型;
②根据胚型外形尺寸裁剪四氟乙烯网格布;
③对搭接部位采用钠萘溶液处理;
(1)将一定量的金属钠加入到四氢呋喃与萘的溶液中,其中金属钠的质量分数控制在3%-5%,在室温下搅拌约2h,直至溶液颜色呈现深褐色或黑色即可;
(2)将待处理四氟乙烯须处理的部位浸入到该溶液中约5-10min,取出再用丙酮溶液浸泡3-5min;
(3)从丙酮溶液中取出工件,用清水漂洗干净后置于阴暗处自然干燥;
(4)选择有机硅树脂做粘合剂,均匀涂于处理过的待粘接表面并立即粘接,于80℃下烘烤2h后即完成粘接。
④将处理过的四氟乙烯网格布在胚型上套装;
⑤采用陶瓷化阻燃硅橡胶压制成型;
⑥在陶瓷化阻燃硅橡胶外表面粘接芳纶毡。
上述实施例为本发明较佳的实现方案,除此之外,本发明还可以其它方式实现,在不脱离本技术方案构思的前提下任何显而易见的替换均在本发明的保护范围之内。
为了让本领域普通技术人员更方便地理解本发明相对于现有技术的改进之处,本发明的一些附图和描述已经被简化,并且为了清楚起见,本申请文件还省略了一些其它元素,本领域普通技术人员应该意识到这些省略的元素也可构成本发明的内容。
Claims (6)
1.电池防护用复合防隔热套,其特征在于:该复合防隔热套由内到外分为四层,第一层为导热硅橡胶,第二层为四氟乙烯网格布,第三层陶瓷化阻燃硅橡胶,第四层为芳纶毡层。
2.根据权利要求1所述的电池防护用复合防隔热套,其特征在于:导热硅橡胶的厚度为0.4-0.6mm,四氟乙烯网格布的厚度为0.4-0.6mm,陶瓷化阻燃硅橡胶的厚度为1.4-1.6mm,芳纶毡层的厚度为0.2-0.3mm。
3.根据权利要求2所述的电池防护用复合防隔热套,其特征在于:导热硅橡胶的厚度为0.5mm,四氟乙烯网格布的厚度为0.5mm,陶瓷化阻燃硅橡胶的厚度为1.5mm,芳纶毡层的厚度为0.25mm。
4.制备如权利要求1至3中任意一项所述的电池防护用复合防隔热套的方法,其特征在于包括以下工艺步骤:
①采用导热硅橡胶压制成胚型;
②根据胚型外形尺寸裁剪四氟乙烯网格布;
③对搭接部位采用钠萘溶液处理;
④将处理过的四氟乙烯网格布在胚型上套装;
⑤采用陶瓷化阻燃硅橡胶压制成型;
⑥在陶瓷化阻燃硅橡胶外表面粘接芳纶毡。
5.根据权利要求4所述的制备电池防护用复合防隔热套的方法,其特征在于:所述步骤①是采用导热硅橡胶通过模压在180℃的模具内固化成型。
6.根据权利要求4所述的制备电池防护用复合防隔热套的方法,其特征在于,制备步骤③中的钠萘溶液处理方法为:
(1)将一定量的金属钠加入到四氢呋喃与萘的溶液中,其中金属钠的质量分数控制在3%-5%,在室温下搅拌约2h,直至溶液颜色呈现深褐色或黑色即可;
(2)将待处理四氟乙烯须处理的部位浸入到该溶液中约5-10min,取出再用丙酮溶液浸泡3-5min;
(3)从丙酮溶液中取出工件,用清水漂洗干净后置于阴暗处自然干燥;
(4)选择有机硅树脂做粘合剂,均匀涂于处理过的待粘接表面并立即粘接,于80℃下烘烤2h后即完成粘接。
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