CN110914012A - 电动汽车用电池冷却装置的制造方法 - Google Patents
电动汽车用电池冷却装置的制造方法 Download PDFInfo
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Abstract
本发明涉及一种电动汽车用电池冷却装置的制造方法,尤其,涉及如下的电动汽车用电池冷却装置的制造方法,即,在向形成冷却装置的上部外壳和下部外壳涂敷熔剂后进行加热接合的过程中,在分两次涂敷上述熔剂后进行接合,来防止在进行上述接合的部分出现泄漏,从而可确保优秀的接合性能。
Description
技术领域
本发明涉及一种电动汽车用电池冷却装置的制造方法,尤其,涉及如下的电动汽车用电池冷却装置的制造方法,即,在向形成冷却装置的上部外壳和下部外壳涂敷熔剂后进行加热接合的过程中,在分两次涂敷上述熔剂后进行接合,来防止在进行上述接合的部分出现泄漏,从而可确保优秀的接合性能。
背景技术
为了向电动汽车提供动力,通常提供可进行充电的电池,可使上述汽车通过由上述电池提供的电流进行工作。
这种电池可在使用时因电阻而产生发热或充电时产生发热,存在因这种发热而导致电池效率下降的问题。
为了解决这种问题,正在开发多种冷却装置。
如图1及图2所示,以往的冷却装置分为由复合板材形成的上部外壳110和下部外壳120。流体在上述上部外壳110与下部外壳120之间的收容空间150进行流动并进行热交换。上述流体通过接口300来向上部外壳110与下部外壳120之间的收容空间投入或通过接口300从上部外壳110与下部外壳120之间的收容空间排出。如图所示,上述接口300可设置于上部外壳110并由投入接口310和排出接口320组成。上述接口300可通过形成于上部外壳110的接口孔116插入,上述接口孔116形成于上部外壳110的接口部114。上述接口部114通过在上部外壳110沿着长度方向突出形成。下部外壳120的边缘部121与上部外壳110相接合,通过使内侧面凹陷来形成收容空间150。划分部140在上述收容空间150中沿着下部外壳120的长度方向朝向上方突出形成。通过这种划分部140,收容空间150被划分为两个部分。
在上述上部外壳110和下部外壳120分别设置有紧固件112、134。
为了使上述上部外壳110和下部外壳120相接合,在对互相相向的面涂敷熔剂后进行接合。利用上述熔剂的理由如下,即,由于在上部外壳110或下部外壳120的表面形成的氧化层而无法很好地进行接合。为了去除上述氧化层,通过在上部外壳110或下部外壳120的表面涂敷熔剂来在使熔剂熔融的过程中去除在表面所形成的氧化层。
若通过如上所述的现有技术来使上部外壳和下部外壳相接合,则将在所接合的部分发生泄漏(leak),存在冷却用流体泄漏的问题。这是因为在通过涂敷上述熔剂而成的熔剂层产生未涂敷部或气孔而导致组织不稠密并由此产生接合不良。
另一方面,上述冷却装置本身为众所周知的,并在现有技术文献中已详细记载,因此将省略对此的具体说明和图示。
发明内容
技术问题
因此,本发明用于解决上述问题,本发明的目的在于,提供一种电动汽车用电池冷却装置的制造方法,即,在向形成冷却装置的上部外壳和下部外壳涂敷熔剂后进行加热接合的过程中,在分两次涂敷上述熔剂后进行接合,由此对在所涂敷的熔剂所产生的未涂敷部或气孔进行弥补,因而通过生成更加稠密的接合组织来防止泄漏,从而可确保优秀的接合性能。
技术方案
为了实现上述目的的本发明提供一种电动汽车用电池冷却装置的制造方法,其中,电动汽车用电池冷却装置由复合板材形成的上部外壳和下部外壳组成,上述上部外壳由铝制上部外壳本体和层叠于上部外壳本体的上部粘结层组成,上述下部外壳与上述上部外壳相结合,由铝制下部外壳本体和层叠于下部外壳本体的下部粘结层组成,在上述上部外壳与下部外壳之间的内部形成收容空间,上述电动汽车用电池冷却装置的制造方法的特征在于,包括:母材准备步骤,准备由复合板材形成的上部外壳和下部外壳;熔剂涂敷步骤,以层叠于上部粘合层和下部粘合层的方式在上部外壳和下部外壳的接合面涂敷熔剂;以及加热接合步骤,以使通过涂敷熔剂而成的熔剂层相互接合的方式对上部外壳和下部外壳进行层叠加热,上述熔剂为氟化物类铝熔剂,与水混合而成,水和铝熔剂分别以15重量百分比~40重量百分比的铝熔剂和60重量百分比~85重量百分比的水混合。
在如上所述的本发明中,在上述上部外壳和下部外壳形成的上述熔剂的层叠厚度分别在30~50μm的范围内。
在如上所述的本发明中,上述熔剂涂敷步骤包括:第一涂敷步骤,在上部外壳和下部外壳的上部粘结层和下部粘结层分别涂敷熔剂;以及第二涂敷步骤,在通过涂敷熔剂而成的熔剂层再次分别涂敷熔剂。
在如上所述的本发明中,在上述第一涂敷步骤与第二涂敷步骤之间还包括对在第一涂敷步骤中通过涂敷熔剂而成的熔剂层进行干燥的熔剂干燥步骤。
在如上所述的本发明中,在上述第一涂敷步骤和第二涂敷步骤中涂敷于上部外壳和下部外壳的熔剂的厚度分别在15~25μm的范围内。
在如上所述的本发明中,上述熔剂为氟化物类铝熔剂,与粘结剂及水混合而成,由15重量百分比~40重量百分比的铝熔剂、0重量百分比~5重量百分比的粘结剂、55重量百分比~85重量百分比的水混合而成。
在如上所述的本发明中,上述加热接合步骤包括:第一次加热步骤,分别对涂敷有熔剂的上部外壳和下部外壳进行加热;以及接合加热步骤,以使经过第一次加热的上部外壳和下部外壳的熔剂层互相接合的方式对上部外壳和下部外壳进行层叠加热。
发明的效果
以上说明的本发明具有如下的效果,可对在所涂敷的熔剂所产生的未涂敷部或气孔进行弥补,因而通过生成更加稠密的接合组织来防止泄漏,从而可确保优秀的接合性能。
附图说明
图1为示出普通电池冷却装置的立体图。
图2为示出分解普通电池冷却装置的上部外壳和下部外壳的分解立体图。
图3为示出根据本发明一实施例的制造方法来使上部外壳和下部外壳层叠的简图。
图4为示出本发明一实施例的制造方法的流程图。
图5为示出本发明一实施例的制造方法中的熔剂涂敷步骤的流程图。
图6为示出本发明一实施例的制造方法中的加热接合步骤的流程图。
具体实施方式
以下,参照附图说明本发明的优选实施例。在此过程中,为了说明上的明确性和便利性,所示出的多个线的厚度或结构要素的大小等有可能被夸大。
并且,后述的多个术语作为考虑本发明的功能而定义的术语,可根据使用人员、运用人员的意图或惯例而变得不同。因此,这种多个术语的定义应根据本说明书全文内容而确定。
以下,参照附图详细说明实施例。
如图1及图2所示,作为采用本发明的制造方法的对象的冷却装置10由复合板材形成的上部外壳110和下部外壳120组成。上述上部外壳110由铝制上部外壳本体110a和层叠于上部外壳本体110a的上部粘结层110b组成。上述下部外壳120与上述上部外壳110相结合,由铝制下部外壳本体120a和层叠于下部外壳本体120a的下部粘结层120b组成。在此情况下,在上述上部外壳110与下部外壳120之间的内部形成收容空间150。
为了制造具有这种结构的冷却装置10,如图3至图6所示,本发明包括母材准备步骤ST-110,准备由复合板材形成的上部外壳110和下部外壳120。之后,进行熔剂涂敷步骤ST-120,以层叠于上部粘合层110b和下部粘合层120b的方式利用气喷射来在上部外壳110和下部外壳120的接合面涂敷熔剂。之后,进行加热接合步骤SI-130,以使通过涂敷熔剂而成的熔剂层相互接合的方式对上部外壳110和下部外壳120进行层叠加热。
如图3所示,上部外壳110和下部外壳120以上下方向层叠,以配置上述上部外壳110和下部外壳120的接合面,即,在相向的部分分别配置上部粘结层110b和下部粘结层120b并在上部粘结层110b与下部粘结层120b之间涂敷熔剂110F。随后,对上述上部外壳110和下部外壳120互相加热来接合。
上述熔剂110F为氟化物类铝熔剂,与水混合而成,水和铝熔剂分别以15重量百分比~40重量百分比的铝熔剂和60重量百分比~85重量百分比的水混合而成。优选地,在上述上部外壳110和下部外壳120形成的上述熔剂110F的层叠厚度分别在30~50μm的范围内。若上述熔剂110F的层叠厚度小于30μm,则会由于熔剂110F不足而导致接合力下降,若上述熔剂110F的层叠厚度大于50μm,则会由于内部粘结剂量而引起碳化,并由此发生泄漏等,反而会导致接合力下降。尤其,最优选地,上述熔剂110F的厚度为20μm。
如图5所示,上述熔剂涂敷步骤ST-120包括两个步骤。即,包括:第一涂敷步骤ST-121,向上述上部外壳110和下部外壳120的上部粘结层110b和下部粘结层120b分别涂敷熔剂;以及第二涂敷步骤ST-123,向通过涂敷熔剂而成的熔剂层再次分别涂敷熔剂。像这样分两次执行熔剂涂敷步骤ST-120的理由为若仅涂敷一次熔剂,则存在有可能会在所涂敷的熔剂产生未涂敷部或气孔而导致接合力下降的隐患。因此,根据本发明来分两次涂敷熔剂,则即使在第一次涂敷的熔剂产生未涂敷部或气孔,也使得第二次涂敷的熔剂渗透到上述未涂敷部或气孔,从而将使所涂敷的熔剂形成稠密的组织并由此提高接合力。
为确认这一点,进行了测试,其结果如下表1所示。
表1
熔剂涂敷次数 | 测试数量 | 不良数量 | 使用压力 |
1次 | 5ea | 2ea | 2.1Bar |
2次 | 5ea | 0ea | 2.1Bar |
3次 | 5ea | 2ea | 2.1Bar |
5次 | 5ea | 5ea | 2.1Bar |
如表1所示,将熔剂涂敷次数分为1次、2次、3次、5次进行了测试,测试数量以5个试制品为对象,通过施加2.1Bar的压力进行了测试。在测试结果中,将发生泄漏判断为不良,将未发生泄漏判断为正常。通过上述表1可以确认到,涂敷1次熔剂时,在以如上所述的方式涂敷的熔剂产生未涂敷部或气孔,导致2个试制品发生泄漏并判定为不良。涂敷2次熔剂时,熔剂渗透到上述未涂敷部或气孔,组织变得稠密,全部试制品被判定为正常,在接合力方面最优选。涂敷3次熔剂时,由于粘结剂稍微过量,反而发生泄漏,试制品中的2个被判定为不良,而涂敷5次熔剂时,粘结剂过于过量,泄漏更加明显,试制品全部被判定为不良。
如图5所示,在上述第一涂敷步骤SY-121与第二涂敷步骤ST-123之间包括对在第一涂敷步骤ST-121中通过涂敷熔剂而成的熔剂层进行干燥的熔剂干燥步骤ST-122。即,首先对经第一次涂敷而成的熔剂层进行干燥后第二次涂敷熔剂。通过这种熔剂干燥步骤ST-122,更多的熔剂将渗透到在已通过涂敷熔剂而成的熔剂层所产生的未涂敷部或气孔,从而使组织变得更加稠密。上述熔剂干燥步骤ST-122在100℃~120℃的温度范围内进行5分钟左右。
优选地,在上述第一涂敷步骤ST-121和第二涂敷步骤ST-123中向上部外壳110和下部外壳120涂敷的熔剂的厚度分别在15~25μm的范围内。即,优选地,如上所述的方式在上述上部外壳110和下部外壳120形成的上述熔剂110F的层叠厚度分别在30~50μm的范围内,并由于在本发明中分为2次进行涂敷,因此,层叠厚度应分别达到一半,即在15~25μm的范围内。
上述熔剂为氟化物类铝熔剂,与粘结剂及水混合而成,由15重量百分比~40重量百分比的铝熔剂、0重量百分比~5重量百分比的粘结剂、55重量百分比~85重量百分比的水混合而成。在此情况下,上述粘结剂起到防止所涂敷的熔剂脱离的作用,包括丁酯类树脂,由于加热接合时碳化,因此在粘结剂过量的情况下会发生焊接不良。
如图6所示,上述加热接合步骤ST-130包括:第一次加热步骤ST-131,分别对涂敷有熔剂的上部外壳110和下部外壳120进行加热;以及接合加热步骤ST-133,以使经过第一次加热的上部外壳110和下部外壳120的熔剂层互相接合的方式对上部外壳110和下部外壳120进行层叠加热。上述第一次加热步骤ST-131在150℃~200℃的温度范围内进行5分钟以上,在这种第一次加热步骤ST-131中,使粘结剂熔融。上述第二次加热步骤ST-133在600℃的温度中进行。
在本发明的说明中所指的范围意味着包括上限值和下限值。
产业上的可利用性
根据以上说明的本发明的电动汽车用电池冷却装置的制造方法,可对在所涂敷的熔剂产生的未涂敷部或气孔进行弥补,因而通过生成更加稠密的接合组织来防止泄漏,从而可确保优秀的接合性能。
Claims (6)
1.一种电动汽车用电池冷却装置的制造方法,其中,电动汽车用电池冷却装置由复合板材形成的上部外壳和下部外壳组成,上述上部外壳由铝制上部外壳本体和层叠于上部外壳本体的上部粘结层组成,上述下部外壳与上述上部外壳相结合,由铝制下部外壳本体和层叠于下部外壳本体的下部粘结层组成,在上述上部外壳与下部外壳之间的内部形成收容空间,上述电动汽车用电池冷却装置的制造方法的特征在于,包括:
母材准备步骤,准备由复合板材形成的上部外壳和下部外壳;
熔剂涂敷步骤,以层叠于上部粘合层和下部粘合层的方式在上部外壳和下部外壳的接合面涂敷熔剂;以及
加热接合步骤,以使通过涂敷熔剂而成的熔剂层相互接合的方式对上部外壳和下部外壳进行层叠加热,
上述熔剂为氟化物类铝熔剂,与水混合而成,水和铝熔剂分别以15重量百分比~40重量百分比的铝熔剂和60重量百分比~85重量百分比的水混合。
2.根据权利要求1所述的电动汽车用电池冷却装置的制造方法,其特征在于,在上述上部外壳和下部外壳形成的上述熔剂的层叠厚度分别在30~50μm的范围内。
3.根据权利要求2所述的电动汽车用电池冷却装置的制造方法,其特征在于,在上述熔剂涂敷步骤中,在上部外壳和下部外壳的上部粘结层和下部粘结层分别涂敷熔剂。
4.根据权利要求3所述的电动汽车用电池冷却装置的制造方法,其特征在于,还包括对通过涂敷熔剂而成的上述熔剂层进行干燥的熔剂干燥步骤。
5.根据权利要求1至4中任一项所述的电动汽车用电池冷却装置的制造方法,其特征在于,上述熔剂为氟化物类铝熔剂,与粘结剂及水混合而成,由15重量百分比~40重量百分比的铝熔剂、0重量百分比~5重量百分比的粘结剂、55重量百分比~85重量百分比的水混合而成。
6.根据权利要求5所述的电动汽车用电池冷却装置的制造方法,其特征在于,上述加热接合步骤包括:
第一次加热步骤,分别对涂敷有熔剂的上部外壳和下部外壳进行加热;以及
接合加热步骤,以使经过第一次加热的上部外壳和下部外壳的熔剂层互相接合的方式对上部外壳和下部外壳进行层叠加热。
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