CN108091780A - 电化学原电池以及电化学原电池的制造方法 - Google Patents

电化学原电池以及电化学原电池的制造方法 Download PDF

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Publication number
CN108091780A
CN108091780A CN201711156451.4A CN201711156451A CN108091780A CN 108091780 A CN108091780 A CN 108091780A CN 201711156451 A CN201711156451 A CN 201711156451A CN 108091780 A CN108091780 A CN 108091780A
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sealing
component
primary cells
receiving portion
container
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CN108091780B (zh
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渡边俊二
田中和美
菅野佳实
玉地恒昭
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Seiko Instruments Inc
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Seiko Instruments Inc
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  • Electrochemistry (AREA)
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Abstract

电池具备包含正极电极以及负极电极的电极体、以及使第一容器以及第二容器重合的封装体。封装体具有容纳电极体的容纳部、以及沿容纳部弯折的密封部。密封部在热熔接的状态下沿着容纳部的第二周壁部弯折。由此，向相对于容纳部的中心轴正交的方向的伸出被抑制得较小。

Description

电化学原电池以及电化学原电池的制造方法
技术领域
本发明涉及电化学原电池以及电化学原电池的制造方法。
背景技术
作为非水电解质二次电池、电双层电容器等电化学原电池，提出了形成为纽扣形(以下，也包含硬币形以及筒形)的电化学原电池。纽扣形的电化学原电池用于各种设备的电源等中。作为纽扣形的电化学电池的一种形态，例如提出了日本特开2002-298803号公报那样的电池。
在日本特开2002-298803号公报中，公开了兼作负极端子的金属制的负极壳体和兼作正极端子的金属制的正极壳体通过绝缘衬套而嵌合的封装体。具体而言，在日本特开2002-298803号公报中，正极壳体通过铆接加工，通过绝缘衬套而嵌合于负极壳体。在铆接加工的部位处形成封装体的密封部。
如此，通过正极壳体以及负极壳体来限定封装体，在封装体的容纳部内，包含了电极体以及非水电解质。
发明内容
然而，在对封装体的密封部进行铆接加工的情况下，电池变得越小，则越是难以将密封部相对于容纳部限制得小。因此，难以提高电池的单位体积的容量，基于该观点，仍有改良的余地。
本发明是鉴于上述问题而完成的，其目的在于提供能够将密封部抑制得较小的电化学原电池以及电化学原电池的制造方法。
本发明的电化学原电池具备：包含正极电极以及负极电极的电极体；以及使第一部件以及第二部件重合而形成的封装体，所述封装体具有：容纳所述电极体的容纳部；以及在所述容纳部的外周，在所述第一部件以及所述第二部件熔接的状态下沿所述容纳部的外周弯折的密封部。
根据本发明，在使密封部熔接的状态下，密封部沿容纳部的外周弯折。由此，能够使密封部接近容纳部的外周。由此，能够将密封部的向相对于容纳部的中心轴正交的方向的伸出抑制得较小。因而，特别是在形状小的电化学原电池中，能够提高电化学原电池的单位体积的容量。
在上述电化学原电池中，至少所述密封部的一部分沿所述容纳部的外周弯曲地形成也可。
根据本发明，至少所述密封部的一部分弯曲地形成。如此，通过沿着容纳部的外周弯折密封部，能够使弯曲的密封部接近容纳部的外周。由此，能够将弯曲的密封部的向相对于容纳部的中心轴正交的方向的伸出抑制得较小。
在上述电化学原电池中，端子部由所述密封部支撑，所述端子部与所述密封部一同弯折也可。
根据本发明，将端子部与密封部一同弯折而构成。因此，能够使端子部靠近容纳部侧。由此，能够将端子部的向相对于容纳部的中心轴正交的方向的伸出抑制得较小。
在上述电化学原电池中，所述第一部件的所述密封部比所述第一部件的其他部分薄，所述第二部件的所述密封部比所述第二部件的其他部分薄也可。
根据本发明，第一部件的密封部比第一部件的其他部分薄，第二部件的密封部比第二部件的其他部分薄。通过使密封部薄，能够进一步减小密封部的伸出。
另外，在将包含金属片的层压部件作为第一部件以及第二部件的情况下，通过较薄地形成层压部件，能够将第一部件以及第二部件的金属片之间的间隙抑制得较小。由此，能够更加良好地抑制水从密封部浸入封装体内部的情况。
在上述电化学原电池中，所述第一部件以及所述第二部件中的至少一者是层压部件，在所述层压部件，设有将所述层压部件贯穿的贯穿电极也可。
根据本发明，使第一部件以及第二部件中的至少一者为层压部件，并且设置将层压部件贯穿的贯穿电极。通过设置贯穿电极，不需要使端子部从密封部突出到外部。因此，能够使电化学原电池更加小型。
在上述电化学原电池中，在所述第二部件是金属的情况下，所述第一部件为层压部件，或者，在所述第一部件是金属的情况下，所述第二部件为层压部件也可。
根据本发明，在第二部件是金属的情况下，第一部件为层压部件，或者，在第一部件是金属的情况下，第二部件为层压部件。由此，能够将第一部件或者第二部件用作金属的端子部。
本发明的电化学原电池的制造方法包含：对容纳电极体的容纳部的外周的密封部进行密封的密封工序；将密封的密封部的一部分固定的固定工序；以及在固定了所述密封部的一部分的状态下，将所述密封部的其他部位弯折的成形工序。
根据本发明，在将密封部熔接之后，固定密封部的一部分。而且，在将密封部的一部分固定了的状态下，将密封部的其他部位弯折。
由此，能够使密封部接近容纳部的外周。由此，能够将密封部的向相对于容纳部的中心轴正交的方向的伸出抑制得较小。因而，特别是在形状小的电化学原电池中，能够提高电化学原电池的单位体积的容量。
在上述电化学原电池的制造方法中，在所述成形工序的后续工序中，还可以切断所述密封部的一部分。
根据本发明，通过切断密封部的一部分，能够将向相对于容纳部的中心轴正交的方向的伸出抑制得更小。
在上述电化学原电池的制造方法中，所述其他部位通过成形模而被弯折，所述密封部的一部分在所述成形工序中通过所述成形模而被切断也可。
根据本发明，在通过成形模弯折了密封部的其他部位之后，通过成形模来切断密封部的一部分。由此，在弯折密封部的其他部位之后，能够迅速地切断密封部的一部分，能够提高电化学原电池的生产率。
在上述电化学原电池的制造方法中，所述其他部位通过成形模而被弯折，所述密封部的一部分在所述成形工序中通过与所述成形模不同的切断装置而被切断也可。
根据本发明，在通过成形模弯折了密封部的其他部位之后，通过与成形模不同的切断装置来切断密封部的一部分。由此，能够选择适于密封部的一部分的切断装置，用所选择的切断装置来更佳地切断密封部的一部分。
根据本发明，在使密封部熔接的状态下，沿容纳部的外周弯折。由此，能够将向相对于容纳部的中心轴正交的方向的伸出抑制得较小。由此，特别是在形状小的电化学原电池中，能够提高电化学原电池的单位体积的容量。
附图说明
图1是本发明的第一实施方式所涉及的电池的立体图。
图2是本发明的第一实施方式所涉及的电池的截面图。
图3是示出了对本发明的第一实施方式所涉及的电池进行成形之前的状态的立体图。
图4A是示出了将本发明的第一实施方式所涉及的成形前的电池配置在成形模中的状态的截面图。
图4B是示出了将本发明的第一实施方式所涉及的成形前的电池在成形模中固定的状态的截面图。
图5A是示出了向本发明的第一实施方式所涉及的成形前的电池移动冲模的状态的截面图。
图5B是示出了对本发明的第一实施方式所涉及的成形前的电池进行成形的状态的截面图。
图6是示出了将本发明的第一实施方式所涉及的电池从成形模中取出的状态的截面图。
图7是本发明的第二实施方式所涉及的电池的立体图。
图8是本发明的第三实施方式所涉及的电池的立体图。
图9是本发明的第四实施方式所涉及的电池的立体图。
图10是本发明的第五实施方式所涉及的电池的立体图。
具体实施方式
以下，参照附图说明本发明所涉及的实施方式。此外，在以下的说明中，作为形成为圆柱状的纽扣形、硬币形或者是筒形的电化学原电池，举为非水电解质二次电池的一种的锂离子二次电池(以下，简称为“电池”)为例进行说明。
[第一实施方式]
图1是第一实施方式所涉及的电池的立体图。图2是第一实施方式所涉及的电池的截面图。
如图1、图2所示，电池1是所谓的纽扣形的电池。电池1具备电极体2、浸泡电极体2的电解质溶液(未图示)、以及容纳电极体2的封装体10。
电极体2具备负极电极3以及正极电极4。负极电极3被折叠为羊肠小道形状。正极电极4以与负极电极3交替地层叠的方式沿与负极电极3交叉的方向折叠为羊肠小道形状。也就是说，电极体2是负极电极3和正极电极4以交替地层叠的方式折叠的层叠类型的电极体。
封装体10具有容纳电极体2的容纳部12、通过将第一容器17以及第二容器18弯折而沿着容纳部12的外周12a形成的密封部15。密封部15是通过拉深成形将第一容器17以及第二容器18弯折，沿容纳部12的外周12a形成的。
另外，封装体10具备有底筒状的第一容器17、以及有底筒状的第二容器18。第一容器17以及第二容器18以各自的中心轴变得同轴的方式配置。以下，将第一容器17以及第二容器18的中心轴设为中心轴O，将沿着中心轴O的方向称为轴方向，将与中心轴O正交的方向称为径向方向。此外，中心轴O为容纳部12的中心轴。
第一容器17是通过层压部件形成的第一部件。层压部件是由金属片、构成第一容器17的内侧面的树脂制的熔接层、以及构成外侧面的树脂制的保护层层叠的。熔接层例如使用为聚烯烃的聚乙烯、聚丙烯等热可塑性树脂形成。作为聚烯烃，能够适当地选择以下材质。作为聚烯烃，能够使用高压法低密度聚乙烯、低压法高密度聚乙烯、吹胀聚丙烯膜、未拉伸聚丙烯膜、双向拉伸聚丙烯膜、直链状短链分支聚乙烯等材质。保护层使用上述聚烯烃、聚对苯二甲酸乙二醇酯等聚酯、尼龙等而形成。
接合层设在金属片和熔接层之间以及金属片和保护层之间。熔接层以及保护层分别隔着接合层通过热熔接或者粘接剂而接合。
第一容器17具备第一底壁部21以及第一周壁部22。在第一底壁部21，形成有第一贯穿孔23。第一贯穿孔23与中心轴O同轴地形成。第一周壁部22相对于第一底壁部21大致直角地弯曲而形成。
在第一底壁部21的内表面，隔着第一密封圈24热熔接有铜板25。第一密封圈24是使用为聚烯烃的聚乙烯、聚丙烯等热可塑性树脂形成的密封膜为圈状的部件。
铜板25的内表面连接于电极体2的负极电极3。铜板25的外表面在中央焊接有镍板26。镍板26贯穿第一贯穿孔23露出到外部，作为电池1的负极端子26起作用。电池1的负极端子26是贯穿电极。另外，如果使铜板25为镍制的，则也可以没有镍板26。
第二容器18与第一容器17同样，是通过层压部件形成的第二部件。层压部件是由金属片、构成第二容器18的内侧面的树脂制的熔接层、以及构成外侧面的树脂制的保护层层叠的。熔接层使用与第一容器17的熔接层相同的热可塑性树脂形成。保护层使用与第一容器17的保护层相同的热可塑性树脂形成。
第二容器18具备第二底壁部31、第二周壁部32以及弯折部33。第二周壁部32形成容纳部12的外周12a。第二周壁部32是相对于第二底壁部31大致直角地将第二容器18弯曲而形成的。弯折部33是与第二周壁部32大致平行地将第二容器18弯折而形成的。
在第二底壁部31，形成有第二贯穿孔35。第二贯穿孔35与中心轴O同轴地形成。
在第二底壁部31的内表面，隔着第二密封圈37热熔接有铝板38。第二密封圈37与第一密封圈24同样，由热可塑性树脂形成。
铝板38的内表面连接于电极体2的正极电极4。铝板38的外表面在中央焊接有镍板39。镍板39贯穿第二贯穿孔35露出到外部，作为电池1的正极端子39起作用。电池1的正极端子39是贯穿电极。
如此，使第一容器17以及第二容器18为层压部件，在第一容器17以及第二容器18设置了贯穿电极26、39。通过设置贯穿电极26、39，不需要使端子部从密封部15突出到外部。因此，能够使电池1的形状小。
第二周壁部32是从第二底壁部31的外周31a朝第一容器17的第一底壁部21筒状地将第二容器18弯折而形成的。。弯折部33在第二周壁部32之中，从第一底壁部21侧的端部32a沿着第二周壁部32向第二底壁部31侧圆筒状地将第二容器18弯折而形成的。弯折部33相对于第二周壁部32向径向方向外侧隔开间隔地配置。弯折部33以及第二周壁部32形成为截面U字状。
第二周壁部32配置在第一周壁部22的内侧且弯折部33的内侧。另外，弯折部33配置在第一周壁部22的内侧。弯折部33的熔接层和第一周壁部22的熔接层热熔接。
通过将弯折部33的熔接层和第一周壁部22的熔接层热熔接，形成密封部15。因此，容纳部12的外周12a通过密封部15密封。由此，将第一容器17以及第二容器18重合而形成封装体10。
作为将弯折部33的熔接层和第一周壁部22的熔接层热熔接的手段，例如能够列举使用加热器、激光器等热源的热熔接。另外，弯折部33的熔接层和第一周壁部22的熔接层除了热熔接之外，例如还能够进行使用超声波焊接的熔接等。
密封部15圆筒状地形成在容纳部12的外侧，并且，沿着容纳部12的外周12a弯折。容纳部12的外周12a由第二周壁部32形成。密封部15在平面视图中形成为圆形，具有弯曲的曲部。
通过沿着容纳部12的外周12a弯折密封部15，能够使密封部15接近容纳部12的外周12a。因此，密封部15的向相对于容纳部12的中心轴O正交的方向的伸出被抑制得较小。由此，特别是在形状小的电池1中，能够提高电池1的单位体积的容量。
另外，密封部15是通过拉深成形将第一容器17以及第二容器18弯折，沿容纳部12的外周12a形成的。因此，密封部15的厚度与第一容器17的其他部位的厚度相比较薄地形成。密封部15的厚度与第二容器18的其他部位的厚度相比较薄地形成。其他部位是指第一底壁部21、第一周壁部22、第二底壁部31、第二周壁部32、以及弯折部33。通过将密封部15的厚度较薄地形成，能够进一步将密封部15的向相对于容纳部12的中心轴O正交的方向的伸出抑制得较小。
另外，通过将第一容器17以及第二容器18的熔接层薄壁地形成，能够将第一容器17以及第二容器18的金属片之间的间隙抑制得较小。由此，能够更加良好地抑制水从密封部15浸入封装体10内部的情况。
在容纳部12中，通过将第一容器17和第二容器18重合而形成密封空间。具体而言，容纳部12是通过第一底壁部21、第二底壁部31、以及第二周壁部32限定的。
接着，基于图3～图6来说明电池1的制造方法。此外，将成形之前的第一容器17作为第一容器素材17A，将成形之前的第二容器18作为第二容器素材18A来进行说明。
图3是示出了对第一实施方式所涉及的电池1进行成形之前的状态的立体图。
在图3的密封工序中，在第一容器素材17A的内表面隔着第一密封圈24、铜板25(参照图2)焊接镍板26。通过镍板26形成负极端子26。在第二容器素材18A的内表面隔着第二密封圈37、铝板38(参照图2)焊接镍板39。通过镍板39形成正极端子39。
在第二容器素材18A的突部42从内侧容纳电极体2(参照图2)，并使第一容器素材17A重合于第二容器素材18A。将第一容器素材17A的第一凸缘44和第二容器素材18A的第二凸缘45热熔接以密封。密封的热熔接部46形成为环状。
图4A是示出了将第一实施方式所涉及的成形前的电池配置在成形模中的状态的截面图。图4B是示出了将第一实施方式所涉及的成形前的电池在成形模中固定的状态的截面图。
在图4A的固定工序中，将第一容器素材17A以及第二容器素材18A配置在成形模50中。具体而言，将热熔接部46的外周缘46a载置于成形模50的下模51的载置部51a。使第一容器素材17A朝向成形模50的上模52。热熔接部46与下模51的下贯穿孔53配置在同轴上。
在图4B的固定工序中，通过下模51的载置部51a以及上模52的推压部52a来夹紧并固定热熔接部46的外周缘46a。热熔接部46相对于下模51的下贯穿孔53、以及上模52的上贯穿孔54配置在同轴上。下贯穿孔53以及上贯穿孔54的内径尺寸同样地形成。
图5A是示出了向第一实施方式所涉及的成形前的电池移动冲模的状态的截面图。图5B是示出了对第一实施方式所涉及的成形前的电池进行成形的状态的截面图。
在图5A的成形工序中，使冲模56和箭头一样上升。冲模56具有以能够嵌合于下贯穿孔53的方式形成的基部57、以及在基部57的上部形成的环状的成形部58。成形部58的外径尺寸比下贯穿孔53以及上贯穿孔54的内径尺寸小地形成。在下贯穿孔53与成形部58之间形成间隔。同样，在上贯穿孔54与成形部58之间形成间隔(参照图5B)。
使冲模56上升并使其嵌合于下贯穿孔53，将成形部58抵接于热熔接部46的外周缘46a的附近46b。
在图5B的成形工序中，使冲模56继续和箭头一样上升，通过成形部58来提起外周缘46a的附近46b。通过上贯穿孔54的内表面和成形部58的外表面，将没有被下模51以及上模52夹紧的热熔接部46的部分46c拉深成形为圆筒状。沿着容纳部12的外周12a弯折热熔接部46的其他部位46c，形成密封部15。
热熔接部46的其他部位是不包含热熔接部46的外周缘46a的部位。
在切断工序中，在对热熔接部46进行拉深成形之后，使冲模56继续和箭头一样上升。基部57的上端57a到达上贯穿孔54。通过基部57的上端57a以及上贯穿孔54的下缘54a，从拉深成形的密封部15切断外周缘46a。因此，通过密封部15密封容纳部12。封装体10的密封部15沿容纳部12的外周12a成形，以制造电池1。
图6是示出了将第一实施方式所涉及的电池从成形模中取出的状态的截面图。
在图6中，将所制造的电池1从上贯穿孔54取出。电池1的密封部15沿容纳部12的外周12a弯折。因此，能够使密封部15接近容纳部12的外周12a。密封部15的向相对于容纳部12的中心轴O正交的方向的伸出被抑制得较小。由此，特别是在形状小的电池1中，能够提高电池1的单位体积的容量。
另外，根据电池1，通过切断热熔接部46的外周缘46a，能够将向容纳部12的中心轴O正交的方向的伸出抑制得更小。
而且，在通过成形模50对密封部15进行拉深成形之后，在切断工序中，使用成形模50来从密封部15切断外周缘46a。由此，在对密封部15进行拉深成形之后，在切断工序中，能够从密封部15迅速地切断外周缘46a，能够提高电池1的生产率。
此外，在图3～图6中，虽然对使用成形模50从密封部15切断外周缘46a的例子进行了说明，但是不限定于此。作为其他例子，还能够在对密封部15进行拉深成形之后，将成形的电池1从成形模50中取出，通过与成形模50不同的切断装置来从密封部15切断外周缘46a。
由此，能够选择适于外周缘46a的切断的切断装置，用所选择的切断装置来从密封部15更佳地切断外周缘46a。作为切断装置，例如能够列举能够旋转的刀片、激光器等。
(变形例)
虽然在前述实施方式中，对将层压部件用于第一容器17以及第二容器18双方，并且在层压部件作为贯穿电极来设置正极端子、负极端子的例子进行了说明，但是不限定于此。作为其他例子，例如还能够使第一容器17以及第二容器18中的一者为层压部件，在第一容器17以及第二容器18中的一者设置贯穿电极。
另外，还能够使第一容器17以及第二容器18中的另一者为金属。通过使另一者为金属，能够将另一者的金属用作端子部。
另外，还能够使第一容器17以及第二容器18二者为金属。在该情况下，在将底漆(primer)涂布在弯折部33与第一周壁部22之间的状态下，将弯折部33以及第一周壁部22热熔接。通过使第一容器17以及第二容器18双方为金属，能够将第一容器17以及第二容器18用作端子部。
接着，基于图7～图10来说明第二实施方式～第五实施方式。此外，在第二实施方式～第五实施方式中，对于与第一实施方式相同、类似的构成，附以相同的符号并省略详细的说明。
[第二实施方式]
接着，基于图7来说明第二实施方式的电池80。
图7是第二实施方式所涉及的电池的立体图。
如图7所示，仅仅是电池80的密封部82与第一实施方式的密封部15不同，其他构成与第一实施方式的电池1同样。
密封部82具有曲部83、一对直线部84、85，以及平坦部86。曲部83在第二周壁部32之中，沿一侧的半部32b形成为半圆弧的弯曲状。
一对直线部84、85中的一个直线部84从曲部83的第一端83a直线地延伸。一对直线部84、85中的另一个直线部85从曲部83的第二端83b直线地延伸。在一对直线部84、85之间配置平坦部86，一对直线部84、85通过平坦部66连结。
根据第二实施方式的电池80，通过沿第二周壁部32的一侧的半部32b弯折曲部83，能够使曲部83接近第二周壁部32的一侧的半部32b。由此，能够将曲部83的向相对于容纳部12的中心轴O正交的方向的伸出抑制得较小。
[第三实施方式]
接着，基于图8来说明第三实施方式的电池90。
图8是第三实施方式所涉及的电池的立体图。
如图8所示，电池90仅仅是在形成为矩形体这一点上与第一实施方式的电池1不同，其他构成与第一实施方式的电池1同样。
电池90具有形成为矩形体的容纳部92、以及形成为矩形框状的密封部95。容纳部92的第二周壁部93具有直线地延伸的四个壁部93a～93d、以及将邻接的壁部93a～93d连结的四个角部94a～94d。通过第二周壁部93形成容纳部92的外周92a。
密封部95具有沿四个壁部93a～93d弯折的直线部96a～96d、以及将邻接的直线部96a～96d连结的四个曲部97a～97d。直线部96a～96d沿容纳部92的壁部93a～93d直线地形成。因此，能够使直线部96a～96d接近壁部93a～93d。
另外，曲部97a～97d沿容纳部92的角部94a～94d在俯视图中弯曲地形成。因此，能够使曲部97a～97d接近容纳部92的角部94a～94d。
根据第三实施方式的电池90，能够使密封部95的直线部96a～96d接近壁部93a～93d。而且，能够使曲部97a～97d接近容纳部92的角部94a～94d。由此，能够将直线部96a～96d、曲部97a～97d的向相对于容纳部92的中心轴O正交的方向的伸出抑制得较小。也就是说，能够将密封部95的伸出抑制得较小。
[第四实施方式]
接着，基于图9来说明第四实施方式的电池100。
图9是第四实施方式所涉及的电池的立体图。
如图9所示，电池100仅仅是在使一对端子部103、104从密封部95突出这一点上与第三实施方式的电池90不同，其他构成与第三实施方式的电池90同样。
一对端子部103、104经由密封膜106、107由密封部95之中平行地配置的直线部95a、95c支撑，并从直线部95a、95c向外部突出。
一对端子部103、104与密封部95一同弯折。由此，能够使一对端子部103、104靠近容纳部108侧，能够将电池100抑制得较小。容纳部108是与第三实施方式的容纳部92类似的部件。
[第五实施方式]
接着，基于图10来说明第五实施方式的电池110。
图10是第五实施方式所涉及的电池的立体图。
如图10所示，电池110仅仅是在使一对端子部113、114从密封部112突出这一点上与第一实施方式的电池1不同，其他构成与第一实施方式的电池1同样。
一对端子部113、114经由密封膜116、117由密封部112支撑，并从密封部112向外部突出。
一对端子部113、114与密封部112一同弯折。由此，能够使一对端子部113、114靠近容纳部118侧，能够将电池110抑制得较小。容纳部118是与第一实施方式的容纳部12类似的部件。
此外，本发明的技术范围并不限于上述实施方式，能够在不脱离本发明主旨的范围内加以各种变更。
虽然在前述实施方式中，对将负极电极3和正极电极4以相互交替的方式折叠的层叠类型的电极体2容纳在容纳部12、92、108、118中的例子进行了说明，但是不限定于此。作为其他电极体，还能够将缠绕类型、片状(pellet)类型的电极体容纳在容纳部12中。
缠绕类型的电极体是将负极电极3和正极电极4缠绕的电极体。片状类型的电极体是在间隔件的两侧具备负极电极3和正极电极4的电极体。
另外，虽然在前述实施方式中，对通过下模51的载置部51a以及上模52的推压部52a来夹持热熔接部46的外周缘46a的例子进行了说明，但是不限定于此。作为其他例子，还能够在载置部51a以及按压部52a中的至少一者的内周侧形成凹陷，使外周缘46a相对于凹陷不接触。
因此，在通过成形模50对密封部15进行拉深成形时，能够使外周缘46a之中相对于凹陷不接触的部位靠近密封部15。由此，能够更好地对密封部15进行拉深成形。
以上，虽然说明了本发明的优选实施例，但本发明不限定于这些实施例。在不脱离本发明的主旨的范围内，能够进行构成的附加、省略、置换、以及其他变更。本发明不受前述说明限定，而是由所附权利要求的范围限定。

Claims (10)

1. 一种电化学原电池，其特征在于，具备：
包含正极电极以及负极电极的电极体；以及
使第一部件以及第二部件重合而形成的封装体，
所述封装体具有：
容纳所述电极体的容纳部；以及
在所述容纳部的外周，在所述第一部件以及所述第二部件熔接的状态下沿所述容纳部的外周弯折的密封部。
2.根据权利要求1所述的电化学原电池，其特征在于，
至少所述密封部的一部分沿所述容纳部的外周弯曲地形成。
3.根据权利要求1或权利要求2所述的电化学原电池，其特征在于，
端子部由所述密封部支撑，
所述端子部与所述密封部一同弯折。
4.根据权利要求1或权利要求2所述的电化学原电池，其特征在于，
所述第一部件的所述密封部比所述第一部件的其他部分薄，
所述第二部件的所述密封部比所述第二部件的其他部分薄。
5.根据权利要求1或权利要求2所述的电化学原电池，其特征在于，
所述第一部件以及所述第二部件中的至少一者由层压部件形成，
在所述层压部件，设有将所述层压部件贯穿的贯穿电极。
6.根据权利要求1或权利要求2所述的电化学原电池，其特征在于，
在所述第一部件由层压部件形成的情况下，所述第二部件由金属形成，
在所述第二部件由层压部件形成的情况下，所述第一部件由金属形成。
7.一种电化学原电池的制造方法，包含：
对容纳电极体的容纳部的外周的密封部进行密封的密封工序；
将密封的所述密封部的一部分固定的固定工序；以及
在进行了所述固定工序的状态下，将在所述固定工序中未被固定的所述密封部的其他部位弯折的成形工序。
8.根据权利要求7所述的电化学原电池的制造方法，其特征在于，
在所述成形工序的后续工序中，还具备将所述密封部的一部分切断的切断工序。
9.根据权利要求8所述的电化学原电池的制造方法，其特征在于，
所述其他部位通过成形模而被弯折，
所述密封部的一部分在所述成形工序中通过所述成形模而被切断。
10.根据权利要求8所述的电化学原电池的制造方法，其特征在于，
所述其他部位通过成形模而被弯折，
所述密封部的一部分在所述成形工序中通过与所述成形模不同的切断装置而被切断。
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