CN114450138A - 用于超声波检查的系统和方法 - Google Patents

用于超声波检查的系统和方法 Download PDF

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CN114450138A
CN114450138A CN202180005454.6A CN202180005454A CN114450138A CN 114450138 A CN114450138 A CN 114450138A CN 202180005454 A CN202180005454 A CN 202180005454A CN 114450138 A CN114450138 A CN 114450138A
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conductive resin
heat conductive
ultrasonic
module frame
liquid injection
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崔元硕
裵宰贤
李康一
吴娜喜
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LG Energy Solution Ltd
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Abstract

根据本发明的实施例的超声波检查系统从外部朝向模块框架的底表面的边缘的一部分传递超声波，以测量所述超声波的波形变化，并且通过所述波形变化来确定形成导热树脂层的导热树脂是否被填充。

Description

用于超声波检查的系统和方法
技术领域
相关申请的交叉引用
本申请要求2020年5月20日在韩国知识产权局提交的韩国专利申请10-2020-0060502号的优先权和权益，该专利申请的全部内容通过引用并入本文。
本发明涉及一种超声波检查系统和方法，更特别地，本发明涉及一种超声波无损检查系统和方法，该超声波无损检查系统和方法可以检查电池模块是否由导热树脂填充。
背景技术
二次电池作为各种产品、诸如移动设备和电动车辆中的能源已经引起广泛关注。二次电池是一种可以替代使用化石燃料的现有产品的有力能源，并且由于不会因为能源使用而产生副产品，因此二次电池作为一种环境友好的能源而令人瞩目。
最近，随着对大容量二次电池结构的需求以及二次电池作为储能源的使用日益增加，对具有多模块结构的电池组的需求也日益增加，在该多模块结构中，其中串联/并联连接有多个二次电池的电池模块被组装为多个。
同时，当通过串联/并联连接多个电池单体来构造电池组时，通常使用如下方法：构造由至少一个电池单体组成的电池模块，然后通过向至少一个电池模块添加其它部件来构造电池组。
所述电池模块包括电池单体堆叠体、模块框架以及导热树脂层，多个电池单体被堆叠在该电池单体堆叠体中，该模块框架容纳所述电池单体堆叠体，并且该导热树脂层通过注入在所述电池单体堆叠体和模块框架之间而形成。
所述导热树脂层主要用于执行将所述电池模块的内部生成的热量传递到外部的冷却功能，由此在将导热树脂液体注入到所述电池模块中之后，本质上需要检查所述导热树脂是否被适当地施加到所述模块框架的底表面。
传统上，当已经被液体注入到形成在所述模块框架的底表面上的检查孔中的导热树脂正在被填充的同时，视觉传感器识别到这一情况，以调整所述导热树脂的液体注入量。然而，所述视觉传感器具有如下问题：检测能力本身很差，并且难以检查除检查孔以外的部分是否被填充。此外，在所述导热树脂固化之后，需要进行后处理，以去除已经在检查孔中溢出的导热树脂，这可能导致导热树脂的损失。
发明内容
技术问题
已经做出本发明以试图提供一种超声波检查系统和方法，该超声波检查系统和方法可以在防止导热树脂的损失的同时准确地检查在电池模块的内部形成的导热树脂层的施加状态。
本发明的目的不限于上述目的，本领域技术人员可以通过以下描述清楚地理解未提及的其它目的。
技术方案
本发明的实施例提供了一种超声波检查系统，该超声波检查系统包括：电池模块，该电池模块包括：电池单体堆叠体，多个电池单体被堆叠在该电池单体堆叠体中；模块框架，该模块框架容纳所述电池单体堆叠体；以及导热树脂层，该导热树脂层通过在所述电池单体堆叠体的下端和所述模块框架的底表面之间液体注入该导热树脂而形成，其中，该超声波检查系统通过超声波的波形变化来确定形成所述导热树脂层的导热树脂是否被填充，该超声波的波形变化通过从外部朝向模块框架的底表面的边缘的一部分发射超声波来测量。
发射和感测超声波的超声波传感器可以被设置成在所述模块框架的外部接触所述模块框架的底表面。
可以形成有多个超声波传感器，并且所述多个超声波传感器可以被设置在所述模块框架的底表面的边缘处。
所述导热树脂层可以通过经由液体注入孔来液体注入导热树脂而形成，该液体注入孔被形成在所述模块框架的底表面中。
多个液体注入孔可以被布置在所述模块框架的底表面的中心部分中。
发射超声波的位置可以是与所述多个液体注入孔间隔开的位置。
本发明的另一个实施例提供了一种超声波检查方法，该超声波检查方法包括：通过液体注入孔来液体注入导热树脂，该液体注入孔被形成在模块框架的底表面中；停止所述导热树脂的液体注入，并且将超声波传感器设置在所述模块框架的底表面的外边缘的一个部分上；通过所述超声波传感器将超声波发射到所述模块框架的底表面中；以及根据超声波的波形来确定所述导热树脂是否被填充。
当通过所述超声波的波形确定填充有导热树脂时，可以进一步包括完成液体注入。
当通过所述超声波的波形确定未填充导热树脂时，可以进一步包括通过液体注入孔来附加地液体注入导热树脂。
在根据所述超声波的波形确定导热树脂是否被填充之后，可以进一步包括：将所述超声波传感器设置在所述模块框架的底表面的外边缘的另一个部分上，并且发射超声波，以根据超声波的波形来确定导热树脂是否被填充。
有利效果
根据本发明的实施例的超声波检查系统和方法提供了通过使用超声波传感器来精确地确定导热树脂是否被填充的效果。
本发明的效果不限于上述效果，本领域技术人员可以通过权利要求的描述而清楚地理解未提及的其它效果。
附图说明
图1示出了根据本发明实施例所述的电池模块的分解立体图。
图2示出了根据本发明实施例所述的电池模块的底表面的立体图。
图3示出了根据本发明实施例所述的超声波传感器的位置。
图4示出了根据本发明实施例所述的在导热树脂的液体注入期间的超声波检查位置的侧剖视图。
图5是根据本发明实施例所述的用于确定导热树脂是否被填充的超声波检查方法的比较图。
图6示出了根据本发明实施例所述的超声波检查方法的流程图。
具体实施方式
下文描述的实施例是为了理解本发明而示例性地示出，应理解，本发明可以以各种方式修改以不同于本文描述的实施例。然而，在本发明的描述中，当相关公知功能或构成元件的详细描述和说明被确定为不必要地使本发明的范围不清楚时，将省略对该相关公知功能或构成元件的详细描述和说明。
本说明书中使用的术语“第一”、“第二”等可以用于描述各种构成元件，但所述构成元件不应受限于这些术语。这些术语应仅用于区分一个构成元件与另一个构成元件。
本说明书中使用的术语仅用于描述特定实施例，而不旨在限制本发明的范围。除非上下文另有明确指示，否则单数形式旨在包括复数形式。在本说明书中，应当理解的是，术语“包括”、“包含”、“具有”或“构造”指示存在说明书中描述的特征、数量、步骤、操作、部件、零件或其组合，但事先不排除存在或添加一个或多个其它的特征、数量、步骤、操作、部件、零件或组合的可能性。
接下来，将参照图1和图2描述根据本发明实施例所述的电池模块。
图1示出了根据本发明实施例所述的电池模块的分解立体图。图2示出了根据本发明实施例所述的电池模块的底表面的立体图。
参照图1和图2，根据本实施例所述的电池模块包括电池单体堆叠体100、模块框架300以及导热树脂层400，多个电池单体被堆叠在该电池单体堆叠体100中，所述模块框架300用于容纳所述电池单体堆叠体100，所述导热树脂层400通过在所述电池单体堆叠体100的下端和所述模块框架300的底表面之间液体注入导热树脂而形成。
所述电池单体是二次电池，并且可以被构造成袋式二次电池。可以构造多个电池单体，并且多个电池单体可以彼此堆叠以彼此电连接，从而形成电池单体堆叠体100。多个电池单体中的每个电池单体可以包括电极组件、电池壳体以及从所述电极组件突出的电极引线。
汇流条框架组件200被形成在所述电池单体堆100的前表面和后表面以及上表面上。所述汇流条框架组件200形成有汇流条框架210和上板220，所述汇流条框架210覆盖所述电池单体堆叠体100的前表面和后表面，并且电连接多个电池单体的电极引线，所述上板220覆盖所述电池单体堆叠体100的上表面，并且在该上板的两端处连接所述汇流条框架210。柔性电路板被设置在所述上板220的下表面处，使得两端处的所述汇流条框架可以彼此电连接。
所述模块框架300形成有上表面、下表面、左表面和右表面，以容纳所述电池单体堆叠体100和汇流条框架组件200。压缩垫被形成在所述电池单体堆叠体100的最外侧电池单体分别与所述框架的左右表面相接触的部分处，以在所述电池单体发生膨胀时吸收所述模块框架300和所述电池单体之间的公差。
当所述电池单体堆叠体100和汇流条框架组件200被容纳在所述模块框架300中时，端板320被联接到所述模块框架300的前表面和后表面，以覆盖所述电池单体堆叠体100的前表面和后表面。由此，可以保护所述模块框架300内部的电子部件，并且可以通过形成在所述端板320上的安装结构将所述电池模块安装在电池组上。
所述导热树脂层400可以通过在所述电池单体堆叠体100的下端和所述模块框架300的底表面310之间注入导热树脂而形成。导热树脂可以由热塑性树脂形成。可以液体注入足量的导热树脂层400，从而接触所述电池单体堆叠体100的多个电池单体的下端。通过将所述电池单体堆叠体100中生成的热量经由所述导热树脂层400传递并散发到外部，可以执行电池模块的冷却功能。
如图2所示，所述导热树脂层400可以通过经由形成在所述模块框架300的底表面中的液体注入孔500液体注入导热树脂而形成。在这种情况下，多个液体注入孔500可以被布置在所述模块框架300的底表面310的中心部分上。导热树脂可以由热塑性树脂形成。
接下来，将参照图3到图5描述根据本发明实施例所述的超声波检查系统。
图3示出了根据本发明实施例所述的超声波传感器的位置。图4示出了根据本发明实施例所述的在导热树脂的液体注入期间的超声波检查位置的侧剖视图。图5是根据本发明实施例所述的用于确定导热树脂是否被填充的超声波检查方法的比较图。
参照图3到图5，根据本实施例所述的超声波检查系统通过超声波的波形变化来确定是否被填充了形成所述导热树脂层400的导热树脂，该超声波的波形变化通过从外部朝向所述模块框架的底表面310的边缘的一部分发射超声波来测量。
传统上，当填充被液体注入到所述检查孔中的导热树脂时，视觉传感器识别到这一情况，以调整液体注入量。然而，该视觉传感器的问题在于，导热树脂的检测能力较低，并且难以确定导热树脂是否被填充在除检查孔以外的部分中。特别地，由于所述液体注入孔被形成在所述模块框架的底表面的中心，因此存在的问题在于，不能检查导热树脂是否被填充直至所述模块框架的底表面的远离液体注入孔的边缘。
此外，当所述导热树脂被充分地液体注入时，由于导热树脂在通过所述检查孔溢出之后发生固化，因此需要后处理来去除通过所述检查孔溢出并固化的部分，并且可能会损失溢出然后发生固化的导热树脂的量。
同时，根据本实施例，朝向所述模块框架的底表面310的边缘的一部分发射超声波，并且测量所发射的超声波的反射波，使得由于能够通过测量出的超声波的波形变化来检查形成所述导热树脂层的导热树脂是否被填充直至所述模块框架的底表面的边缘，因此能够准确地确定所述导热树脂是否被填充。
此外，由于能够仅通过超声波传感器来检查所述导热树脂是否填充在所述电池模块的内部，因此不需要通过所述检查孔来测量是否填充的方法，使得能够降低传统检查孔的加工成本，可以省略去除通过所述检查孔溢出并发生固化的导热树脂的过程，并且可以通过溢出并固化的导热树脂的去除量来降低所述导热树脂的材料成本。
根据本实施例，如图4所示，用于发射和感测超声波的超声波传感器600可以被设置成在所述模块框架300的外部接触所述模块框架的底表面310。可以形成多个超声波传感器600，并且多个超声波传感器可以被设置在所述模块框架的底表面的边缘处。
所述导热树脂层400可以通过经由形成在所述模块框架的底表面310中的液体注入孔500液体注入导热树脂而形成，并且多个液体注入孔500被布置在所述模块框架的底表面310的中心部分中，使得发射超声波的位置可以是与所述多个液体注入孔500间隔开的位置。因此，能够通过使用超声波来检查经由所述液体注入孔500液体注入的导热树脂是否通过所述电池单体堆叠体100和模块框架的底表面310之间的空间被施加到与所述液体注入孔500间隔开的位置。
参照图5，在所述电池模块内部的未填充有导热树脂的部分中，观察到作为所述模块框架的底表面310的材料的铝的特有波形，但在填充有导热树脂的部分中，波形消失，也就是说出现波形差异。由此，通过使得所述超声波传感器600与所述模块框架的底表面310的特定位置相接触，能够确定导热树脂是否被填充在其中。
接下来，将参照图6描述根据本发明实施例所述的超声波检查方法。
图6示出了根据本发明实施例所述的超声波检查方法的流程图。
参照图4和图6，根据本实施例所述的超声波检查方法包括：通过形成在所述模块框架的底表面310中的液体注入孔500来液体注入导热树脂(S100)；停止所述导热树脂的液体注入(S200)；以及将超声波传感器设置在所述模块框架的底表面310的外边缘的一个部分(参见图3)上(S300)；通过所述超声波传感器600将超声波发射到所述模块框架的底表面310中(S400)；以及根据超声波的波形确定所述导热树脂是否被填充(S500)。
根据本实施例，当通过超声波的波形确定填充有导热树脂时，可以进一步包括完成液体注入(S600)。
此外，根据本实施例，当通过超声波的波形确定未填充导热树脂时(S520)，可以进一步包括通过所述液体注入孔500附加地液体注入导热树脂(S700)。在附加地液体注入所述导热树脂之后，在先前设置的位置处再次设置超声波传感器，并且可以发射超声波以重新检查导热树脂是否被填充在对应的位置处。
此外，根据本实施例，当通过超声波的波形确定填充有导热树脂时，可以进一步包括完成液体注入(S600)。
此外，根据本实施例，在根据超声波的波形确定导热树脂是否被填充之后，可以进一步包括：将所述超声波传感器600设置在所述模块框架的底表面310的外边缘的另一部分上，并且发射超声波，以根据超声波的波形来确定导热树脂是否被填充。由此，能够在所述模块框架310的底表面上的多个点处检查导热树脂是否被填充，从而能够更准确地确定导热树脂是否被填充。
在前文的描述中，已经说明和描述了本发明的实施例，但是本发明不限于特定的实施例，并且对于本领域的技术人员来说将是显而易见的是，可以在不脱离本发明的精神或范围的情况下进行各种修改和变化，因此，本发明旨在涵盖本发明的修改和变型，只要这些修改和变型在所附权利要求及其等效方案的范围内即可。
附图标记说明
100:电池单体堆叠体
200:汇流条框架组件
300:模块框架
310:模块框架的底表面
320:端板
400:导热树脂层
500:液体注入孔
600:超声波传感器。

Claims (10)

1.一种超声波检查系统，包括：
电池模块，所述电池模块包括：
电池单体堆叠体，多个电池单体被堆叠在所述电池单体堆叠体中；
模块框架，所述模块框架容纳所述电池单体堆叠体；以及
导热树脂层，所述导热树脂层通过在所述电池单体堆叠体的下端和所述模块框架的底表面之间液体注入导热树脂而形成，
其中，所述超声波检查系统通过超声波的波形变化来确定是否填充形成所述导热树脂层的导热树脂，所述超声波的波形变化通过从外部朝向所述模块框架的所述底表面的边缘的一部分发射所述超声波来测量。
2.根据权利要求1所述的超声波检查系统，其中，发射和感测所述超声波的超声波传感器被设置成在所述模块框架的外部接触所述模块框架的所述底表面。
3.根据权利要求2所述的超声波检查系统，其中，设置多个所述超声波传感器，并且所述多个超声波传感器被设置在所述模块框架的所述底表面的边缘处。
4.根据权利要求1所述的超声波检查系统，其中，所述导热树脂层通过经由液体注入孔来液体注入导热树脂而形成，所述液体注入孔被形成在所述模块框架的所述底表面中。
5.根据权利要求4所述的超声波检查系统，其中，多个所述液体注入孔被布置在所述模块框架的所述底表面的中心部分中。
6.根据权利要求5所述的超声波检查系统，其中，发射所述超声波的位置是与所述多个液体注入孔间隔开的位置。
7.一种超声波检查方法，包括：
通过液体注入孔来液体注入导热树脂，所述液体注入孔被形成在模块框架的底表面中；
停止所述导热树脂的所述液体注入，并且将超声波传感器设置在所述模块框架的所述底表面的外边缘的一个部分上；
通过所述超声波传感器将超声波发射到所述模块框架的所述底表面中；以及
根据所述超声波的波形来确定所述导热树脂是否被填充。
8.根据权利要求7所述的超声波检查方法，进一步包括：
当通过所述超声波的波形确定填充有所述导热树脂时，完成所述液体注入。
9.根据权利要求7所述的超声波检查方法，进一步包括：
当通过所述超声波的波形确定所述导热树脂未被填充时，通过所述液体注入孔附加地液体注入所述导热树脂。
10.根据权利要求7所述的超声波检查方法，进一步包括：
在根据所述超声波的波形确定所述导热树脂是否被填充之后，将所述超声波传感器设置在所述模块框架的所述底表面的外边缘的另一部分上，并且发射超声波，以根据所述超声波的波形来确定所述导热树脂是否被填充。
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