CN108886158A - 制造能量存储设备的方法 - Google Patents
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Abstract
一种制造能量存储设备(1)的方法,包括形成堆叠,所述堆叠至少包括第一电极层(6)、第一电流收集层(12)和布置在第一电极层(6)和第一电流收集层(12)之间的电解质层(8)。在堆叠中形成穿过第一电极层(6)和电解质层(8)的第一槽(24),由此形成第一电极层(6)和电解质层8)的暴露边缘。用电绝缘材料填充第一槽(24)的至少一部分,由此用电绝缘材料覆盖第一电极层(6)和电解质层(8)的暴露边缘。沿第一槽(24)的至少一部分切割绝缘材料和第一电流收集层(12),以便于形成第一电流收集层(12)的暴露边缘。
Description
技术领域
本发明涉及一种制造能量存储设备的方法,且特别地但不排他的涉及一种能量储存设备,包括薄膜电池,其具有固态电解质。
背景技术
包括电极、电解质和电流收集器层的固态薄膜电池通常通过首先形成包括形成在基板上的第一电流收集层、电极层、电解质层、第二电极层和第二电流收集层的堆叠而制造。堆叠然后被切割为独立段以形成单个电池。每个电池于是可以被涂覆保护层,以便于防止层的钝化和可能的短路。
为了形成与电池的电连接,例如为了电连接彼此堆叠的多个电池的电流收集器,保护层的一部分被移除,例如通过蚀刻。替代地,掩模可以在涂覆步骤之前被施加,以确保每个电流收集器的一部分被暴露。在每种情况下,掩模或蚀刻的附加步骤增加了生产工艺的成本和复杂性。
发明内容
根据本发明,提供了一种制造能量存储设备的方法,包括:形成堆叠,所述堆叠至少包括第一电极层、第一电流收集层和布置在第一电极层和第一电流收集层之间的电解质层;在堆叠中形成穿过第一电极层和电解质层的第一槽,由此形成第一电极层和电解质层的暴露边缘;用电绝缘材料填充第一槽的至少一部分,由此用电绝缘材料覆盖第一电极层和电解质层的暴露边缘;以及沿第一槽的至少一部分切割绝缘材料和第一电流收集层,以便于形成第一电流收集层的暴露边缘。
本发明提供了简单、快速、低成本方法来制造固态电池,其具有暴露的电流收集器,其然后可以被容易地电连接到其它电池,以形成电池堆叠的一部分。
堆叠还可包括与第一电极层相关联的第二电流收集层,其中第一电极层和电解质层布置在第一和第二电流收集层之间。第一槽可形成在堆叠中穿过第二电流收集层,由此形成第二电流收集层的暴露边缘。
电绝缘材料可覆盖第二电流收集层的暴露边缘。
方法还包括在堆叠中形成穿过第一电流收集层、电解质层和第一电极层的第二槽,由此形成第一电流收集层、电解质层和第一电极层的暴露边缘;用电绝缘材料填充第二槽的至少一部分,由此用电绝缘材料覆盖第一电流收集层、电解质层和第一电极层的暴露边缘;以及沿第二槽的至少一部分切割绝缘材料和第二电流收集层,以便于形成第二电流收集层的暴露边缘。
所述第一电流收集层可形成第二电极层。替代地或附加地,堆叠还可包括布置在第一电流收集层和电解质层之间的第二电极层,且第一槽还形成为穿过第二电极层。
第一和/或第二槽可通过激光切割操作形成。在激光切割操作期间气态单体可被提供在第一和/或第二槽的区域中,使得气态单体通过激光切割操作聚合在槽中,以形成电绝缘材料。用电绝缘材料填充第一槽的至少一部分的步骤可包括用液体填充槽的至少一部分的步骤。液体可包括有机悬浮液体材料。液体可固化在槽中。能量储存设备可为电化学电池或电容器。
附图说明
为了更好地理解本发明,和更清楚地示出本发明如何发生作用,现在将通过实例、参考以下附图来描述本发明,其中:
图1是包括多个电池的能量储存设备的示意性图示;
图2是图1中所示的能量储存设备的示意性图示,其中电池被电连接;
图3a到3h示出了制造图1中所示的能量储存设备的电池的方法;
图4是图3a到3h中所示的方法的变式的示意性图示;以及
图5示出了图4中由虚线围绕的区域。
具体实施方式
图1显示了一种能量储存设备1,包括第一化学电池2,定位在第二化学电池4的顶部上。第一和第二化学电池2、4相同。然而,第一电池2是颠倒的。每个电池2、4包括堆叠,其具有负电流收集层6,其也形成负电极层(其在电池2、4的放电期间为阳极),电解质层8,正电极层10(其在电池2、4放电期间为阴极),和正电流收集层12。每个电池2沿相对侧由绝缘材料14、16界定。
在每个电池2、4的左手侧(如图1中所示),绝缘材料14覆盖电解质层8、正电极层10和正电流收集层12的边缘。负电流收集层/负电极层6在每个电池2、4的左手侧上的边缘被暴露。
在每个电池2、4的右手侧(如图1中所示),绝缘材料16覆盖负电流收集层/负电极层6、电解质层8和正电极层10的边缘。正电流收集层12在每个电池2、4的右手侧上的边缘被暴露。
能量储存设备1的益处在于电连接器18、20可以提供在两个电池2、4的相对侧上,如图2所示,使得在左侧的电连接器18接触每个电池2、4的负电流收集层6,但是被绝缘材料14防止接触其它层,而在右侧的电连接器20接触正电流收集层12,但是被绝缘材料16防止接触其它层。绝缘材料14、16由此防止在每个电池2、4中电流收集层6、12和其它层之间的短路。电连接器18、20可以,例如,为通过溅射施加到堆叠的边缘的金属化材料。电池2、4可由此简单且容易地以并联方式结合。
现在将参考图3a-3h描述制造图1中所示的电池的方法。
图3a示出了正电流收集层12,包括镍箔,但是应理解适当的金属可被使用,例如铝、铜或刚,或金属化材料,其包括金属化塑料,例如在聚对苯二甲酸乙二酯(PET)上的铝。第一正电极层10被沉积在电流收集层12上,例如通过流体沉积或蒸汽沉积,如图3b所示。正电极层10在放电期间形成阴极,且可包括适于通过稳定化学反应存储锂离子的材料,例如锂钴氧化物(Lithium Cobalt Oxide)或锂铁磷酸盐(Lithium Iron Phosphate)或碱金属多硫化物盐(alkali metal polysulphide salt)。电解质层8被沉积在正电极层10的顶部上,如图3c所示。对于电化学电池,电解质层可包括任何适当的材料,其为离子传导性,但是也是电绝缘材料,譬如锂磷氧氮(Lithium Phosporous OxyNitride,LiPON)负电极层6被沉积在电解质层8的顶部上,如图3d所示,其完成堆叠的组合。负电极层6还提供负电流收集器(其在放电时用作阳极)。在特定实施例中,负电流收集器和负电极层可以为独立层。负电极层可包括锂金属,石墨,硅或铟锡氧化物。
在负电流收集器为独立层的实施例中,负电流收集层可包括镍箔,但是应理解适当的金属可被使用,例如铝、铜或刚,或金属化材料,其包括金属化塑料,例如在聚对苯二甲酸乙二酯(PET)上的铝。每个层可通过流体沉积法来沉积,其提供生产高均质层的简单有效的方法。
激光切割工具被用于在堆叠的上部和下部部分中切割平行交替的槽22、24,如图3e所示。堆叠的下部部分中的槽22从堆叠的上部部分中的槽24偏置。在下部槽22和上部槽24之间的堆叠的区域对应于单个电池。
堆叠的下部部分中的每个槽22被切割通过电流收集层12、正电极层10和电解质层8到负电极层6。
堆叠的上部部分中的每个槽24被切割通过负电极层6、电解质层8和正电极层10到电流收集层12。
切除操作产生沿每个层的边缘,其在相应槽中被暴露,且在上部槽24中暴露电流收集层12的上表面的一部分,在下部槽22中暴露负电极层6下表面的一部分。应理解每个槽的深度必须非常精确,以便于仅切割通过期望的层,并且防止或至少最小化要保留完整的层的任何移除。双光子激光切割(dual-photon laser cutting)技术是优选切割方法,因为它预期能够提供所需的精确性。然而,其它适当的切割方法可以被用于每个步骤,例如适用于移除材料以形成槽和/或独立电池的任何方法。不同方法可以被用于形成槽和用于形成电池的每个步骤,例如超声切割之后进行气体喷射。
在所示实施例中,切割操作在包括气态单体的环境中进行,该气态单体在切割操作期间聚合在由切割步骤形成的层的边缘上,以及在每个槽的底部处的电流收集层12的暴露的上表面上和负电极层6的暴露的下表面上。聚合物提供电绝缘塞26、28,其覆盖槽中各层的暴露边缘和暴露表面部分,如图3f所示。任何适当的聚合物可以被使用,譬如乙烯、氯乙烯或四氟乙烯。在替代实施例中,电绝缘塞可以通过以诸如有机悬浮液体材料填充槽,然后固化槽中的液体来形成。
一旦聚合物已经固化,堆叠被沿着槽22、24切割,如图3g中的虚线所示,为如图3h所示的独立电池。切割操作可仍通过激光执行。每个切割穿过绝缘塞26、28的中心,使得塞26、28分为两件,每件形成在每个相应电池2、4的它所附接的边缘和表面上的保护性覆盖物。
切割通过整个堆叠产生第一和第二电池2、4的正电流收集层12和负电极层6的暴露边缘,如图3h所示。
第二电池4被颠倒,且放置在第一电池2的顶部上,以产生如图1所示的能量储存设备1。电连接器18、20,例如金属化层,于是通过沿能量储存设备1的每侧溅射而形成,以便于连接在能量储存设备1的一侧上的每个电池2、4的正电流收集层12,以及在能量储存设备1的相对侧上的负电极层/负电流收集层6。
图4和5示出了上述方法的一个变式,其中连续堆叠被建立在一片正电流收集层12上,其可以例如从辊抽取,数百且可能数千的电池可以从其切下。一旦形成,堆叠折回到其自身上,如图4所示,以建立z折叠配置,其具有自身十个、优选数百个且潜在的数千个层,其中每个绝缘塞26、28被对齐,如图5所示。激光切割方法然后被用于在单个操作中切割通过所有堆叠(如图5中的虚线所示),用于对齐该组塞中的每一个。
堆叠可以形成为使得它在切割槽之前和将堆叠切割为独立电池之前处于充电状态。槽的切割,其将电池的能量储存部件从彼此分离和/或随后的电流收集层的切割以将堆叠分离为独立电池可以改善制造和随后操作过程的安全性,因为并不需要操纵存储大量能量的较大堆叠。
Claims (13)
1.一种制造能量存储设备的方法,包括:
形成堆叠,所述堆叠至少包括第一电极层、第一电流收集层和布置在第一电极层和第一电流收集层之间的电解质层;
在堆叠中形成穿过第一电极层和电解质层的第一槽,由此形成第一电极层和电解质层的暴露边缘;
用电绝缘材料填充第一槽的至少一部分,由此用电绝缘材料覆盖第一电极层和电解质层的暴露边缘;以及
沿第一槽的至少一部分切割绝缘材料和第一电流收集层,以便于形成第一电流收集层的暴露边缘。
2.如权利要求1所述的方法,所述堆叠还包括与第一电极层相关联的第二电流收集层,其中第一电极层和电解质层布置在第一和第二电流收集层之间,其中第一槽形成在堆叠中穿过第二电流收集层,由此形成第二电流收集层的暴露边缘。
3.如权利要求2所述的方法,其中电绝缘材料覆盖第二电流收集层的暴露边缘。
4.如权利要求2或3所述的方法,所述方法还包括:
在堆叠中形成穿过第一电流收集层、电解质层和第一电极层的第二槽,由此形成第一电流收集层、电解质层和第一电极层的暴露边缘;
用电绝缘材料填充第二槽的至少一部分,由此用电绝缘材料覆盖第一电流收集层、电解质层和第一电极层的暴露边缘;以及
沿第二槽的至少一部分切割绝缘材料和第二电流收集层,以便于形成第二电流收集层的暴露边缘。
5.如前述权利要求中任一项所述的方法,其中所述第一电流收集层形成第二电极层。
6.如权利要求1至5中任一项所述的方法,其中所述堆叠还包括布置在第一电流收集层和电解质层之间的第二电极层,且第一槽形成为穿过第二电极层。
7.如前述权利要求中任一项所述的方法,其中第一槽通过激光切割操作形成。
8.如权利要求7所述的方法,其中在激光切割操作期间气态单体被提供在第一和/或第二槽的区域中,使得气态单体通过激光切割操作聚合在槽中,以形成电绝缘材料。
9.如前述权利要求中任一项所述的方法,其中用电绝缘材料填充第一槽的至少一部分的步骤包括用液体填充槽的至少一部分的步骤。
10.如权利要求9所述的方法,其中所述液体包括有机悬浮液体材料。
11.如权利要求10或11所述的方法,其中所述液体被固化在槽中。
12.如前述权利要求中任一项所述的方法,其中所述能量储存设备为电化学电池。
13.一种制造能量储存设备的方法,其基本如本文参考附图的描述和如附图所示。
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AU2017235770A1 (en) | 2018-09-06 |
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