CN106207070B - Secondary battery - Google Patents
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- CN106207070B CN106207070B CN201510292337.9A CN201510292337A CN106207070B CN 106207070 B CN106207070 B CN 106207070B CN 201510292337 A CN201510292337 A CN 201510292337A CN 106207070 B CN106207070 B CN 106207070B
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- 239000007773 negative electrode material Substances 0.000 claims 1
- 239000007774 positive electrode material Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
提供了一种二次电池,所述二次电池可以通过在电极接线片上形成圆形部分来防止电极接线片在电极板的卷绕过程中折叠或撕裂。所述二次电池包括:电极组件,包括正极板、负极板和置于正极板与负极板之间的隔板;电极接线片,从正极板和负极板中的每个延伸并且突出到电极组件的上部;壳体,容纳电极组件;盖板,密封壳体的顶部;以及电极端子,分别突出到盖板的上部并连接到电极接线片,其中,每个电极接线片包括在电极接线片的侧部处形成为圆形的圆形部分。
Provided is a secondary battery that can prevent the electrode tab from being folded or torn during the winding process of the electrode sheet by forming a circular portion on the electrode tab. The secondary battery includes: an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate; an electrode tab extending from each of the positive electrode plate and the negative electrode plate and protruding to the electrode assembly the upper part of the cover plate; the case, which accommodates the electrode assembly; the cover plate, which seals the top of the case; A rounded portion is formed at the side portion.
Description
本申请要求于2015年1月28日在韩国知识产权局提交的第10-2015-0013523号韩国专利申请的优先权,该申请的内容通过引用全部包含于此。This application claims priority to Korean Patent Application No. 10-2015-0013523 filed in the Korean Intellectual Property Office on Jan. 28, 2015, the contents of which are hereby incorporated by reference in their entirety.
技术领域technical field
本发明涉及一种二次电池。The present invention relates to a secondary battery.
背景技术Background technique
通常,不同于不可再充电的一次电池,二次电池可以重复地充电和放电。根据技术发展以及诸如移动电话和笔记本计算机的移动装置的生产增加,对于作为能源的二次电池的需求正在快速地增加。近来,作为对于化石燃料的可替代能源,对用在电动车辆或混合动力车辆的二次电池的研究在积极地进行。Generally, unlike primary batteries which are not rechargeable, secondary batteries can be repeatedly charged and discharged. According to technological development and increased production of mobile devices such as mobile phones and notebook computers, the demand for secondary batteries as an energy source is rapidly increasing. Recently, as an alternative energy source to fossil fuels, research into secondary batteries used in electric vehicles or hybrid vehicles is actively being conducted.
发明内容SUMMARY OF THE INVENTION
本发明提供了一种二次电池,所述二次电池可以通过在电极接线片上形成圆形部分来防止电极接线片在电极板的卷绕过程中折叠或撕裂。The present invention provides a secondary battery that can prevent the electrode tab from being folded or torn during the winding process of the electrode sheet by forming a circular portion on the electrode tab.
本发明的以上和其他目标将在优选实施例的下面描述中进行描述或根据优选实施例的下面描述将是明显的。The above and other objects of the present invention will be described in or will be apparent from the following description of the preferred embodiment.
根据本发明的一方面,提供了一种二次电池,所述二次电池包括:电极组件,包括正极板、负极板和置于正极板与负极板之间的隔板;电极接线片,从正极板和负极板中的每个延伸并且突出到电极组件的上部;壳体,容纳电极组件;盖板,密封壳体的顶部;以及电极端子,分别突出到盖板的上部并连接到电极接线片,其中,每个电极接线片包括在电极接线片的侧部处形成为圆形的圆形部分。According to an aspect of the present invention, there is provided a secondary battery, the secondary battery comprising: an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate; an electrode tab, from Each of the positive electrode plate and the negative electrode plate extends and protrudes to an upper portion of the electrode assembly; a case that accommodates the electrode assembly; a cap plate that seals the top of the case; and electrode terminals that respectively protrude to the upper portion of the cap plate and are connected to electrode wiring sheet, wherein each electrode tab includes a circular portion formed into a circular shape at a side of the electrode tab.
电极接线片可以具有从与正极板和负极板分隔开的顶部到底部逐渐增大的宽度。The electrode tab may have a width gradually increasing from the top to the bottom spaced apart from the positive and negative plates.
电极接线片可以包括与正极板和负极板中的每个直接接触的第一区域和在与第一区域平行的同时与第一区域分隔开的第二区域,第一区域的长度可以大于第二区域的长度。The electrode tab may include a first region in direct contact with each of the positive electrode plate and the negative electrode plate and a second region spaced apart from the first region while being parallel to the first region, and the length of the first region may be greater than the first region. The length of the second region.
圆形部分可以使第一区域和第二区域彼此连接。The circular portion may connect the first area and the second area to each other.
圆形部分的半径可以为第二区域的长度的1至1.5倍。The radius of the circular portion may be 1 to 1.5 times the length of the second region.
圆形部分的半径可以为电极接线片的高度的0.35至1倍。The radius of the circular portion may be 0.35 to 1 times the height of the electrode tab.
可以通过激光处理切割正极板和负极板的未涂覆有正极活性物质和负极活性物质的未涂覆部分来形成电极接线片。The electrode tabs may be formed by cutting uncoated portions of the positive electrode plate and the negative electrode plate, which are not coated with the positive electrode active material and the negative electrode active material, by laser processing.
如上所述,根据本发明的二次电池可以通过在电极接线片上形成圆形部分来防止电极接线片在电极板的卷绕过程中弯曲或撕裂。As described above, the secondary battery according to the present invention can prevent the electrode tab from being bent or torn during the winding process of the electrode sheet by forming the circular portion on the electrode tab.
附图说明Description of drawings
通过参照附图详细描述本发明的优选实施例,本发明的以上和其他特征及优点将变得更加明显,在附图中:The above and other features and advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings, in which:
图1是根据本发明的实施例的二次电池的透视图;1 is a perspective view of a secondary battery according to an embodiment of the present invention;
图2是图1中示出的二次电池的分解透视图;FIG. 2 is an exploded perspective view of the secondary battery shown in FIG. 1;
图3是示出在图1中示出的二次电池中的电极接线片、电极引线和电极端子中的每个之间的连接关系的分解透视图;3 is an exploded perspective view showing a connection relationship between each of an electrode tab, an electrode lead, and an electrode terminal in the secondary battery shown in FIG. 1;
图4是根据本发明的实施例的二次电池中的电极组件的透视图;4 is a perspective view of an electrode assembly in a secondary battery according to an embodiment of the present invention;
图5是根据本发明的实施例的二次电池中的电极板的正视图;5 is a front view of an electrode plate in a secondary battery according to an embodiment of the present invention;
图6是根据本发明的实施例的二次电池中的电极接线片的放大正视图;6 is an enlarged front view of an electrode tab in a secondary battery according to an embodiment of the present invention;
图7示出按照根据本发明的实施例的二次电池中的电极接线片的构造的应力分布;7 illustrates stress distribution according to the configuration of the electrode tab in the secondary battery according to the embodiment of the present invention;
图8示出根据本发明的实施例的二次电池中的具有不同数值的尺寸的电极接线片的应力分布。8 illustrates stress distributions of electrode tabs having sizes of different numerical values in a secondary battery according to an embodiment of the present invention.
具体实施方式Detailed ways
现在将详细地参考本发明的给出的实施例,本发明的示例被示出在附图中。Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
本公开的各个方面可以以许多不同的形式实施,且不应该被解释为局限于这里阐述的示例实施例。相反,提供本公开的这些示例实施例,使得本公开将是彻底的和完整的,并且将把本公开的各个方面传达给本领域技术人员。Aspects of the present disclosure may be embodied in many different forms and should not be construed as limited to the example embodiments set forth herein. Rather, these example embodiments of this disclosure are provided so that this disclosure will be thorough and complete, and will convey various aspects of this disclosure to those skilled in the art.
在附图中,为了清晰起见,夸大了层和区域的厚度。这里,同样的附图标记始终指示同样的元件。如这里使用的,术语“和/或”包括一个或更多个相关所列项目的任意和所有组合。In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Here, the same reference numbers refer to the same elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
另外,在这里使用的术语仅用于描述具体实施例的目的,并不意在成为本公开的限制。如在这里使用的,除非上下文另外清楚地表明,否则单数形式意在也包括复数形式。还将理解的是,当在本说明书中使用术语“包含”和/或“包括”时,说明存在所述特征、数量、步骤、操作、元件和/或组件,但不排除存在或附加一个或更多个其他特征、数量、步骤、操作、元件、组件和/或它们的组。Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that when the terms "comprising" and/or "comprising" are used in this specification, the stated features, numbers, steps, operations, elements and/or components are indicated to be present, but are not precluded the presence or addition of one or and more other features, numbers, steps, operations, elements, components and/or groups thereof.
将理解的是,虽然术语第一、第二等在这里可用于描述不同的构件、元件、区域、层和/或部分,但是这些构件、元件、区域、层和/或部分不应该受这些术语的限制。这些术语仅是用来将一个构件、元件、区域、层和/或部分与另一个构件、元件、区域、层和/或部分区分开。因此,例如,在不脱离本公开的教导的情况下,下面讨论的第一构件、第一元件、第一区域、第一层和/或第一部分可以被称作第二构件、第二元件、第二区域、第二层和/或第二部分。It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, elements, regions, layers and/or sections, these elements, elements, regions, layers and/or sections should not be affected by these terms limits. These terms are only used to distinguish one element, element, region, layer and/or section from another element, element, region, layer and/or section. Thus, for example, a first member, element, region, layer and/or section discussed below could be termed a second member, second element, The second region, the second layer and/or the second portion.
图1是根据本发明的实施例的二次电池的透视图,图2是图1中示出的二次电池的分解透视图,图3是示出在图1中示出的二次电池中的电极接线片、电极引线和电极端子中的每个之间的连接关系的分解透视图。1 is a perspective view of a secondary battery according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the secondary battery shown in FIG. 1 , and FIG. 3 is an exploded perspective view of the secondary battery shown in FIG. 1 . An exploded perspective view of the connection relationship between each of the electrode tabs, electrode leads, and electrode terminals.
参照图1至图3,根据本发明的实施例的二次电池100包括电极组件110、壳体120和盖板140。1 to 3 , a
电极组件110包括正极板111、负极板112和隔板113,并且可以与电解质(未示出)一起容纳于壳体120中,然后被密封。The
例如,可以通过将正极板111、负极板112和隔板113的堆叠结构卷绕成果冻卷构造或将该堆叠结构堆叠成矩形平行六面体的形状来形成电极组件110。这里,正极板111可以由铝(Al)箔制成,负极板112可以由铜(Cu)箔制成,隔板113可以由聚乙烯(PE)或聚丙烯(PP)制成,但是本发明的多个方面不限于此。电解质可以用作通过在充电和放电过程中在二次电池100的正极板111与负极板112之间的电化学反应产生的锂离子的移动介质。电解质可以是作为锂盐和高纯度的有机溶剂的混合物的非水有机电解质。另外,电解质可以是使用高分子电解质的聚合物。For example, the
正极板111可以通过在正极集流体(未示出)的至少一个表面上涂覆正极活性物质形成。类似地,负极板112可以通过在负极集流体(未示出)的至少一个表面上涂覆负极活性物质形成。例如,在本发明的实施例中,正极板110可以设置在电极组件110的最外部,这是为了通过将产生相对大量的热的正极集流体(未示出)布置到邻近于壳体120的外侧来通过壳体120促进热辐射的目的。例如,正极集流体(未示出)可以与壳体120直接接触或者至少可以热接触壳体120。这里,表述“热接触”可以是指即使两个元件可能不彼此直接接触,也允许在彼此热接触的两个元件之间的热交换。The
正极接线片114和负极接线片115可以连接到正极板111和负极板112的至少一个或更多个位置。正极接线片114和负极接线片115通常形成为具有在10mm至30mm的范围内的高度。在本发明的整个说明书中,正极接线片114和负极接线片115可以被统称为电极接线片114和115。The
在高容量、高输出的二次电池的情况下,多个正极接线片114和多个负极接线片115可以从电极组件110延伸。更详细地讲,每个正极接线片114可以通过切割正极板111的未涂覆有正极活性物质的正极未涂覆部分并形成接线片来形成。另外,负极接线片115也可以通过切割负极板112的未涂覆有负极活性物质的负极未涂覆部分并形成接线片来形成。二次电池可以通过多个正极接线片114和负极接线片115获得高功率电流。这里,可以单独准备每个正极接线片114和每个负极接线片115,然后将其附着到正极板111和负极板112的未涂覆部分。In the case of a high-capacity, high-output secondary battery, a plurality of
同时,电极接线片114和115可以形成为包括形成在其一侧和另一侧处的圆形部分114c和115c。在形成电极接线片114和115时,可以使用激光处理来促进圆形部分114c和115c的形成。圆形部分114c和115c的半径可以在7mm至30mm的范围内。随后将更详细地描述圆形部分114c和115c。Meanwhile, the
正极接线片114可以连接到盖板140本身,并且负极接线片115可以连接到延伸到盖板140的顶表面的负极端子145。例如,正极端子144和负极端子145可以暴露于盖板140的顶表面。这里,正极接线片114可以连接到正极引线134以随后电连接到正极端子144。另外,负极接线片115可以连接到负极引线135以随后电连接到负极端子145。在本发明的整个说明书中,正极引线134和负极引线135可以被统称为电极引线134和135。The
在电极接线片114和115连接到电极引线134和135之前,多个电极接线片114和115可以通过点焊(tack welding)集中成单捆(单束)。通过点焊集中成单捆的电极接线片114和115可以更容易地连接到电极引线134和135。Before the
电极组件110和电解质(未示出)容纳于壳体120中。壳体120具有顶端开口并可以通过深冲压形成。壳体120的顶端开口可以被盖板140密封。这里,盖板140和壳体120的接触部分可以通过激光焊接彼此结合。壳体120可以由从钢、铝及其等同物中选择的一种制成,但本发明的多个方面不限于此。The
正极引线134电连接正极接线片114、盖板140和正极端子144。正极引线134可以被构造为以大体上“L”形状弯曲。更详细地讲,正极引线134可以在两个不同的方向上延伸以随后弯曲。正极引线134的第一部分134a可以设置为面对盖板140的底表面以随后结合到盖板140。另外,在与第一部分134a不同的方向上延伸的第二部分134b可以设置为面对正极接线片114以随后结合到正极接线片114。为了形成盖板140与正极接线片114之间的连接,正极引线134可以被构造为在不同的方向上弯曲以面对与其结合的元件。The
负极引线135电连接负极接线片115和负极端子145。负极引线135可以被构造为以大体上“L”形状弯曲。更详细地讲,负极引线135的第一部分135a可以设置为面对盖板140的底表面以随后结合到盖板140。这里,负极绝缘板132可以置于第一部分135a与盖板140之间,使得第一部分135a和盖板140可以彼此电不连接。另外,在与第一部分135a不同的方向上延伸的负极引线135的第二部分135b可以设置为面对负极接线片115以随后结合到负极接线片115。为了形成盖板140与负极接线片115之间的连接,负极引线135可以被构造为在不同的方向上弯曲以面对与其结合的元件,但本发明的多个方面不限于此。例如,负极引线135可以具有平板的形状。The
负极绝缘板132置于负极引线135与盖板140的底表面之间,以使负极引线135和盖板140电绝缘。负极绝缘板132与随后描述的衬垫142一起可以使负极引线135和盖板140电绝缘。另外,负极绝缘板132可以防止电连接到电极组件110的正极接线片114的盖板140导电成相反的极性。用于允许负极端子145穿过其中的端子孔135'和132'可以形成在负极引线135和负极绝缘板132中。The negative
同时,与负极绝缘板132设置在盖板140与负极引线135之间的情况类似,正极绝缘板131可以设置在盖板140与正极引线134之间。可以设置正极绝缘板131以建立相对于负极绝缘板13的平衡。也就是说,可以插入正极绝缘板131以保持在盖板140与正极引线134之间的高度和在盖板140与负极引线135之间的高度的平衡。另外,正极绝缘板131可以置于盖板140与正极引线134之间,以在压缩结合的过程中使用随后描述的结合销141来增大结合强度。Meanwhile, similar to the case where the negative
盖板140可以是尺寸化并成形为与壳体120的顶端开口对应的金属板。盖板140包括结合销141、正极端子144、负极端子145和衬垫142。The
结合销141将正极引线134与盖板140紧固地结合。例如,可以组装从盖板140的底表面突出的结合销141以穿过正极引线134,从盖板140的底表面突出的结合销141的底端可以通过铆接或旋转而压缩结合到正极引线134的底表面。例如,在通过铆接结合的情况下,通过使用锤子敲打从盖板140的底表面突出的结合销141的底端,将结合销141的底端相对于正极引线134的底表面压缩。在通过旋转结合的情况下,通过使用在高速下旋转的处理工具压制暴露于正极引线134的底表面的结合销141的底端,将结合销141的底端相对于正极引线134的底表面压缩。同时,在其他实施例中,正极引线134和盖板140可以通过焊接彼此结合。The
正极端子144可以是从盖板140一体地突出的一部分或者可以形成为结合以覆盖盖板140的顶表面的单独的构件。另外,类似于盖板140,正极端子144可以具有正极性。正极端子144可以通过正极引线134连接到电极组件110的正极111。The
可以组装负极端子145以穿过盖板140。负极端子145可以建立与盖板140的绝缘连接并可以延伸到盖板140的顶表面。负极端子145可以通过负极引线135连接到电极组件110的负极112。The
更详细地讲,可以组装负极端子145以穿过盖板140、绝缘板132和负极引线135的端子孔140'、132'和135',负极端子145的底部分被压在负极引线135的底表面上,从而使盖板140、绝缘板132和负极引线135以位置对齐的状态彼此一体地结合。In more detail, the
例如,盖板140、绝缘板132和负极引线135堆叠以彼此覆盖,负极端子145从盖板140的顶部连续地插入到端子孔140'、132'和135'中以彼此组装,从负极端子145的暴露于负极引线135的底表面的底部执行铆接或旋转,从而以负极端子145被压在负极引线135的底表面上的状态组装负极端子145。For example, the
负极端子145的底部压缩结合到负极引线135的底表面。然而,还对负极端子145的底部执行焊接,从而将负极端子145和负极引线135更紧密地彼此结合。负极端子145和负极引线135的结合形成负极的充电/放电通路。同时,负极端子145的顶部从其圆柱形主体以板的形状突出,然后相对于盖板140的顶表面被压缩。The bottom of the
同时,衬垫142置于负极端子145与盖板140之间。也就是说,负极端子145通过将衬垫142插入在负极端子145与盖板140之间与盖板140组装。这里,用于允许负极端子145穿过其中的端子孔140'形成在盖板140中。负极端子145以衬垫142插入在负极端子145与盖板140之间的状态插入到盖板140的端子孔140'中,从而使负极端子145与盖板140电绝缘。衬垫142密封端子孔140'的外围区域,从而防止容纳于壳体120中的电解质(未示出)的泄漏并执行密封功能以防止外部杂质渗透到盖板140中。Meanwhile, the
图4是根据本发明的实施例的二次电池中的电极组件的透视图,图5是根据本发明的实施例的二次电池中的电极板的正视图,图6是根据本发明的实施例的二次电池中的电极接线片的放大正视图。由于电极组件与以上描述的基本相同,因此将不再给出电极组件的重复的描述并且下面的描述将集中于电极接线片的构造。4 is a perspective view of an electrode assembly in a secondary battery according to an embodiment of the present invention, FIG. 5 is a front view of an electrode plate in a secondary battery according to an embodiment of the present invention, and FIG. 6 is an implementation of the present invention An enlarged front view of an electrode tab in an example secondary battery. Since the electrode assembly is substantially the same as that described above, a repeated description of the electrode assembly will not be given and the following description will focus on the configuration of the electrode tab.
参照图4至图6,电极组件110包括正极板111、负极板112和置于正极板111与负极板112之间的隔板113。另外,电极组件110包括连接到正极板111以随后向上突出的正极接线片114和连接到负极板112以随后向上突出的负极接线片115。4 to 6 , the
正极接线片114形成为突出到正极板111的顶部。这里,正极接线片114包括与正极板111直接接触的第一区域114a、在与第一区域114a平行的同时与第一区域114a分隔开的第二区域114b以及连接第一区域114a和第二区域114b的圆形部分114c。这里,第一区域114a优选地具有比第二区域114b的长度大的长度。另外,优选地通过制圆工艺来形成圆形部分114c。The
负极接线片115可以具有与正极接线片114的构造相同的构造。也就是说,负极接线片115包括与负极板112直接接触的第一区域115a、在与第一区域115a平行的同时与第一区域115a分隔开的第二区域115b以及连接第一区域115a和第二区域115b的圆形部分115c。The
可以通过使用激光切口(laser notching)装置切割正极板111和负极板112(在下文中,统称为电极板)的未涂覆部分来形成正极接线片114和负极接线片115(在下文中,统称为电极接线片)。按照这样的方式,将具有电极接线片114和115的电极板111和112以隔板113置于电极板111与112之间的方式卷绕,从而形成电极组件110。这里,使用包括用于传输电极板111和112以及隔板113的多个辊的板卷绕装置(未示出)来卷绕电极板111和112以及隔板113。The
电极接线片114和115的第一区域114a和115a的长度大于第二区域114b和115b的长度,圆形部分114c形成在第一区域114a与第二区域114b之间,圆形部分115c形成在第一区域115a与第二区域115b之间,从而防止由薄的、软的材料制成的电极接线片114和115在卷绕电极板111和112的过程中被辊折叠或撕裂。The lengths of the
更详细地讲,在处理电极接线片114和115或者使用辊传输电极板111和112的过程中,如果向电极板111和112施加张力,则应力会集中于电极接线片114和115。应力的集中发生在电极接线片114和115的底部,即,第一区域114a和115a。这里,第一区域114a和115a的宽度被制成大于第二区域114b和115b的宽度,从而防止应力的集中。另外,圆形部分114c形成在第一区域114a与第二区域114b之间,圆形部分115c形成在第一区域115a与第二区域115b之间,可以更有效地分散应力,从而有效地防止电极接线片114和115的折叠或撕裂。另外,即使第一区域114a和115a的宽度被圆形部分114c和115c增大,也能够防止电极接线片114和115的整体宽度极度地增大。In more detail, in the process of processing the
参照图6,圆形部分114c的半径A可以是第二区域114b的长度B的1至1.5倍。如果圆形部分114c的半径A小于第二区域114b的长度B,则分散应力的效果微弱,正极接线片114会在卷绕电极组件110的过程中折叠或撕裂。另外,如果圆形部分114c的半径A大于第二区域114b的长度B的1.5倍,则第一区域114a的长度会极度地增大。也就是说,由于第一区域114a的长度增大,因此每个正极接线片114之间的距离减小,这是不期望的。6, the radius A of the
同时,由于圆形部分114c的半径A是第二区域114b的长度的1至1.5倍,因此第一区域114a的长度可以为第二区域114b的长度的3至4倍。Meanwhile, since the radius A of the
另外,圆形部分114c的半径A可以是正极接线片114的高度C的0.35至1倍。如果圆形部分114c的半径A小于正极接线片114的高度C的0.35倍,则分散应力的效果微弱,正极接线片114会在卷绕电极组件110的过程中折叠或撕裂。另外,如果圆形部分114c的半径A大于正极接线片114的高度C,则第一区域114a的长度会极度地增大。最终,每个正极接线片114之间的距离会减小,这是不期望的。In addition, the radius A of the
同时,在负极接线片115的情况下,圆形部分115c的半径可以是第二区域115b的长度的1至1.5倍。另外,圆形部分115c的半径可以是负极接线片115的高度的0.35至1倍,这与正极接线片114的情况基本相同,将不再给出重复的描述。Meanwhile, in the case of the
图7示出按照根据本发明的实施例的二次电池中的电极接线片的构造的应力分布。7 illustrates stress distribution according to the configuration of the electrode tab in the secondary battery according to the embodiment of the present invention.
参照图7,使用计算机辅助工程(CAE)模拟了均包括不同形状的电极接线片(即,矩形电极接线片(a)、梯形电极接线片b和圆形电极接线片c)的电极板的卷绕工艺,并示出其结果。这里,将具有8μm至12μm的厚度的铜箔或铝箔用作每个电极板。另外,通过使用矩形激光处理电极板的未涂覆部分来形成电极接线片。此外,每个电极板在以780mm/s的卷绕速度穿过辊的同时被卷绕。这里,向各个电极板施加相同的张力。在图7中,出现在图7中示出的电极接线片上的圆形带指示应力分布线并且红色的部分指示具有最高应力的区域。通常,圆形的指甲状的带形成在电极接线片上并且电极接线片在卷绕电极板的过程中会沿该带折叠或撕裂。7, the rolls of electrode plates each including electrode tabs of different shapes (ie, rectangular electrode tabs (a), trapezoidal electrode tabs b, and circular electrode tabs c) were simulated using computer-aided engineering (CAE). around the process and show its results. Here, copper foil or aluminum foil having a thickness of 8 μm to 12 μm is used as each electrode plate. In addition, electrode tabs were formed by processing the uncoated portion of the electrode plate with a rectangular laser. In addition, each electrode plate was wound while passing through the roll at a winding speed of 780 mm/s. Here, the same tension is applied to each electrode plate. In Fig. 7, the circular bands appearing on the electrode tabs shown in Fig. 7 indicate stress distribution lines and the red portions indicate regions with the highest stress. Typically, a circular fingernail-like band is formed on the electrode tab and the electrode tab is folded or torn along the band during winding of the electrode plate.
如图7所示,电极接线片的基体(即,电极接线片的第一区域)越大,应力越小。因此,电极接线片的第一区域越大,可以预计到电极接线片最低程度折叠。具体地讲,展现了显著地减弱的应力集中。具有圆形部分的电极接线片c展现了最高的应力分散效应,其中,电极接线片c具有作为电极接线片的基体的相对宽的第一区域,同时电极接线片的整体宽度不增大。因此,在使用具有圆形部分的电极接线片的情况下,电极接线片的折叠在卷绕电极板的过程中被最小化。As shown in FIG. 7 , the larger the base of the electrode tab (ie, the first region of the electrode tab), the smaller the stress. Therefore, the larger the first area of the electrode tab, the least folding of the electrode tab can be expected. In particular, significantly reduced stress concentrations are exhibited. The electrode tab c having the rounded portion exhibits the highest stress dispersing effect, wherein the electrode tab c has a relatively wide first region as the base of the electrode tab while the overall width of the electrode tab is not increased. Therefore, in the case of using an electrode tab having a circular portion, folding of the electrode tab is minimized during winding of the electrode plate.
同时,如从图7中示出的模拟结果中理解的,当在780mm/s的高速下执行卷绕时,仅具有圆形部分的电极接线片没有发生折叠。因此,理解的是,该电极接线片基于卷绕速度展示了最期望的特性。也就是说,在使用具有圆形部分的电极接线片的情况下,即使在电极板的高速卷绕过程中也可以使电极接线片的折叠最小化。Meanwhile, as understood from the simulation results shown in FIG. 7 , when the winding was performed at a high speed of 780 mm/s, the electrode tab having only the circular portion did not fold. Therefore, it is understood that the electrode tab exhibits the most desirable characteristics based on the winding speed. That is, in the case of using the electrode tab having the round portion, the folding of the electrode tab can be minimized even during high-speed winding of the electrode plate.
图8示出根据本发明的实施例的二次电池中的具有不同数值的尺寸的电极接线片的应力分布。8 illustrates stress distributions of electrode tabs having sizes of different numerical values in a secondary battery according to an embodiment of the present invention.
参照图8,通过改变各个圆形部分的半径和在各个电极接线片的顶部上的第二区域的长度使用计算机辅助工程(CAE)模拟了均包括圆形的电极接线片的电极板的卷绕工艺。下面的表列出了根据圆形部分的半径和第二区域的长度的每个电极接线片的折叠发生或未发生的模拟结果。Referring to Figure 8, the winding of electrode plates each comprising circular electrode tabs was simulated using computer aided engineering (CAE) by varying the radius of each circular portion and the length of the second region on top of each electrode tab craft. The following table lists the simulation results for the occurrence or non-occurrence of folding of each electrode tab according to the radius of the circular portion and the length of the second region.
表1Table 1
(○:折叠发生,×:折叠未发生)(○: folding occurs, ×: folding does not occur)
在表1中,以毫米为单位全部测量了第二区域的长度和圆形部分的半径,电极接线片具有固定的28mm的高度。In Table 1, the length of the second region and the radius of the circular portion were all measured in millimeters, and the electrode tab had a fixed height of 28 mm.
如图8和表1所示,电极接线片d、g和h未发生折叠,明显的应力分布线示出在其他电极接线片中,暗示其发生折叠。也就是说,当在每个电极接线片中圆形部分的半径小于第二区域的长度时,电极接线片a、b、c、e、f和i发生折叠。然而,当圆形部分的半径等于或大于第二区域的长度时,像在电极接线片d、g和h中,折叠未发生。因此,基于模拟结果,理解的是,圆形部分的半径优选地大于或等于第二区域的长度。另外,为了防止与电极接线片的基体对应的第一区域的长度极度地增大,圆形部分的半径优选地小于第二区域的长度的1.5倍。As shown in Figure 8 and Table 1, the electrode tabs d, g, and h were not folded, and distinct stress distribution lines were shown in the other electrode tabs, suggesting that they were folded. That is, when the radius of the circular portion in each electrode tab is smaller than the length of the second region, the electrode tabs a, b, c, e, f and i are folded. However, when the radius of the circular portion is equal to or greater than the length of the second region, as in the electrode tabs d, g, and h, folding does not occur. Therefore, based on the simulation results, it is understood that the radius of the circular portion is preferably greater than or equal to the length of the second region. In addition, in order to prevent the length of the first region corresponding to the base of the electrode tab from being extremely increased, the radius of the circular portion is preferably less than 1.5 times the length of the second region.
如上所述,在根据本发明的实施例的二次电池中,在电极接线片中形成圆形部分以制成电极接线片的相对地靠近电极板的长于第二区域的第一区域。这里,圆形部分可以具有第二区域的长度的1至1.5倍的半径。另外,圆形部分的半径可以是电极接线片的高度的0.35至1倍。As described above, in the secondary battery according to the embodiment of the present invention, the circular portion is formed in the electrode tab to make the first region of the electrode tab that is longer than the second region relatively close to the electrode plate. Here, the circular portion may have a radius of 1 to 1.5 times the length of the second region. In addition, the radius of the circular portion may be 0.35 to 1 times the height of the electrode tab.
也就是说,在电极接线片上形成圆形部分以增大电极接线片的基体的长度,从而有效地防止在卷绕电极板的过程中应力集中于电极接线片。因此,可以防止应力集中于电极接线片,从而使电极接线片的折叠或撕裂最小化。另外,即使在高速卷绕电极板的过程中,也可以防止电极板的折叠。因此,可以获得高质量的电极接线片,从而防止由于电极接线片的故障而导致的二次电池的性能的劣化或着火。That is, the circular portion is formed on the electrode tab to increase the length of the base body of the electrode tab, thereby effectively preventing stress from concentrating on the electrode tab during winding of the electrode plate. Therefore, stress concentration on the electrode tab can be prevented, thereby minimizing folding or tearing of the electrode tab. In addition, even in the process of winding the electrode plate at a high speed, the folding of the electrode plate can be prevented. Therefore, a high-quality electrode tab can be obtained, thereby preventing deterioration or ignition of the performance of the secondary battery due to failure of the electrode tab.
尽管已经参照本发明的示例性实施例具体示出并描述了本发明,但是本领域的普通技术人员将理解的是,在不脱离权利要求限定的本发明的精神和范围的情况下,可以对此进行形式和细节上的各种改变。因此期望的是,给出的实施例在所有方面被视为示例性的而非限制性的,对权利要求做出的参考而不是前面的描述表明本发明的范围。While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that This makes various changes in form and detail. It is therefore intended that the given embodiments be considered in all respects to be illustrative and not restrictive, and that reference made to the claims rather than the foregoing description indicates the scope of the invention.
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Families Citing this family (12)
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KR102771991B1 (en) * | 2017-02-22 | 2025-02-25 | 삼성에스디아이 주식회사 | Secondary battery having symmetrical multi-tap |
KR102712362B1 (en) | 2018-10-12 | 2024-10-04 | 삼성에스디아이 주식회사 | Secondary battery |
KR20210019846A (en) * | 2019-08-13 | 2021-02-23 | 삼성에스디아이 주식회사 | Electrode assembly and secondary battery comprising the same |
US12132227B2 (en) | 2021-01-19 | 2024-10-29 | Lg Energy Solution, Ltd. | Battery, and battery pack and vehicle comprising the same |
JP2023549378A (en) | 2021-01-19 | 2023-11-24 | エルジー エナジー ソリューション リミテッド | Batteries and current collectors applied thereto, battery packs and automobiles containing such batteries |
US12199247B2 (en) | 2021-02-19 | 2025-01-14 | Lg Energy Solution, Ltd. | Battery and current collector applied thereto, and battery pack and vehicle including the same |
WO2023013929A1 (en) * | 2021-08-05 | 2023-02-09 | 주식회사 엘지에너지솔루션 | Electrode assembly, battery, and battery pack and vehicle comprising same |
KR102406005B1 (en) * | 2021-10-28 | 2022-06-08 | 이계설 | Flagforming device after laser notching of secondary batteries for electric vehicles |
US12249681B2 (en) | 2021-11-19 | 2025-03-11 | Lg Energy Solution, Ltd. | Electrode assembly, battery, and battery pack and vehicle including the same |
CN217562788U (en) * | 2022-06-28 | 2022-10-11 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and power consumption device |
WO2024106989A1 (en) * | 2022-11-16 | 2024-05-23 | 주식회사 엘지에너지솔루션 | Electrode assembly, battery including same, and battery pack and automobile including such battery |
KR102636276B1 (en) * | 2022-11-17 | 2024-02-14 | 에스케이온 주식회사 | Anode for secondary battery, manufacturing method thereof and lithium secondary battery including the same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10275610A (en) * | 1997-01-31 | 1998-10-13 | Shin Kobe Electric Mach Co Ltd | Sealed storage battery |
JPH1116577A (en) * | 1997-06-26 | 1999-01-22 | Shin Kobe Electric Mach Co Ltd | Non-aqueous electrolyte battery |
JP2006092826A (en) * | 2004-09-22 | 2006-04-06 | Shin Kobe Electric Mach Co Ltd | Cylindrical sealed lead-acid battery |
CN102763238A (en) * | 2010-02-17 | 2012-10-31 | 株式会社东芝 | Battery and method for producing same |
CN202695607U (en) * | 2012-08-03 | 2013-01-23 | 广东凯德能源科技有限公司 | Lithium ion battery pole piece |
CN103858254A (en) * | 2011-08-31 | 2014-06-11 | Nec能源元器件株式会社 | Non-aqueous electrolyte secondary battery |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100973310B1 (en) * | 2007-12-21 | 2010-07-30 | 삼성에스디아이 주식회사 | Electrode tab for secondary battery and secondary battery having same |
KR101219248B1 (en) * | 2011-01-12 | 2013-01-08 | 삼성에스디아이 주식회사 | Secondary battery |
CN104137304B (en) * | 2012-04-16 | 2018-02-06 | 株式会社Lg 化学 | Include electrode assemblie and secondary cell with positive pole of different shapes and negative pole |
-
2015
- 2015-01-28 KR KR1020150013523A patent/KR102324345B1/en active Active
- 2015-06-01 CN CN201510292337.9A patent/CN106207070B/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10275610A (en) * | 1997-01-31 | 1998-10-13 | Shin Kobe Electric Mach Co Ltd | Sealed storage battery |
JPH1116577A (en) * | 1997-06-26 | 1999-01-22 | Shin Kobe Electric Mach Co Ltd | Non-aqueous electrolyte battery |
JP2006092826A (en) * | 2004-09-22 | 2006-04-06 | Shin Kobe Electric Mach Co Ltd | Cylindrical sealed lead-acid battery |
CN102763238A (en) * | 2010-02-17 | 2012-10-31 | 株式会社东芝 | Battery and method for producing same |
CN103858254A (en) * | 2011-08-31 | 2014-06-11 | Nec能源元器件株式会社 | Non-aqueous electrolyte secondary battery |
CN202695607U (en) * | 2012-08-03 | 2013-01-23 | 广东凯德能源科技有限公司 | Lithium ion battery pole piece |
Also Published As
Publication number | Publication date |
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KR102324345B1 (en) | 2021-11-10 |
KR20160092748A (en) | 2016-08-05 |
CN106207070A (en) | 2016-12-07 |
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