WO2023071767A1

WO2023071767A1 - Battery cell, battery, and electric device

Info

Publication number: WO2023071767A1
Application number: PCT/CN2022/124436
Authority: WO
Inventors: 李晓伟; 刘晓梅; 郑挺
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2021-10-25
Filing date: 2022-10-10
Publication date: 2023-05-04
Also published as: CN216980650U

Abstract

The embodiments of the present application relate to the technical field of battery production, and disclosed are a battery cell, a battery, and an electric device. The battery cell comprises a shell, an electrode assembly, an elastic member, a top cap and an electrode terminal, wherein the shell has a cavity and an opening in communication with the cavity; the electrode assembly is arranged in the cavity; the elastic member comprises a first assembly plane and a second assembly plane, which are arranged opposite each other, and the first assembly plane is arranged on the electrode assembly in a pressing manner; the top cap is connected to the housing and closes the opening; and the electrode terminal is arranged in a manner of penetrating the top cap and is maintained on the second assembly plane in a pressing manner, and the electrode terminal is electrically connected to the electrode assembly by means of the elastic member.

Description

电池单体、电池及用电装置Battery cells, batteries and electrical devices

本申请要求于2021年10月25日申请的、申请号为202122573303.0的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority to a Chinese patent application with application number 202122573303.0 filed on October 25, 2021, the entire contents of which are incorporated herein by reference.

技术领域technical field

本申请实施例涉及电池生产技术领域，特别涉及一种电池单体、电池及用电装置。The embodiments of the present application relate to the technical field of battery production, and in particular to a battery cell, a battery, and an electrical device.

背景技术Background technique

电池作为日常生活中重要的能量来源，具有容量高、循环寿命长的特点。目前得到广泛应用的电池主要以锂离子电池为主，锂离子电池在工作电压、能量密度、循环寿命等方面都具有显著优势。As an important energy source in daily life, batteries have the characteristics of high capacity and long cycle life. At present, the widely used batteries are mainly lithium-ion batteries. Lithium-ion batteries have significant advantages in terms of operating voltage, energy density, and cycle life.

电池的内部能量向外界传递依靠电极端子和电极组件之间的电连接，目前在位于电池内部的电极组件与露出电池的电极端子之间，通常采用转接部件进行转接，以实现电极组件与电极端子之间的电连接。但是目前的电池在进行电极组件与电极端子之间的转接时，转接部件的定位较为困难；并且转接部件在与电极组件以及电极端子焊接后，会存在焊渣清除不干净的问题，而焊渣残留会带来自放电甚至安全风险。The internal energy transfer of the battery to the outside depends on the electrical connection between the electrode terminal and the electrode assembly. At present, between the electrode assembly inside the battery and the electrode terminal exposed from the battery, transfer parts are usually used to transfer the electrode assembly and the electrode assembly. Electrical connection between electrode terminals. However, when the current battery is transferring between the electrode assembly and the electrode terminal, the positioning of the transfer part is relatively difficult; and after the transfer part is welded with the electrode assembly and the electrode terminal, there will be a problem that the welding slag is not cleaned cleanly. The residual welding slag will bring self-discharge and even safety risks.

技术问题technical problem

本申请实施例的目的在于提供一种电池单体、电池及用电装置，不仅有利于转接部件的定位，而且能够避免转接部件在焊接后由于焊渣残留而带来的自放电甚至安全风险。The purpose of the embodiment of the present application is to provide a battery cell, battery and electrical device, which not only facilitates the positioning of the transfer parts, but also avoids self-discharge and even safety of the transfer parts due to residual welding slag after welding. risk.

技术解决方案technical solution

为本申请实施例提供了一种电池单体，包括：壳体、电极组件、弹性件、顶盖和电极端子，壳体具有空腔以及与空腔连通的开口；电极组件设置在空腔内；弹性件包括相对设置的第一装配平面和第二装配平面，第一装配平面压设在电极组件上；顶盖与壳体连接、并封闭开口；电极端子贯穿顶盖设置、并压持在第二装配平面上，电极端子经弹性件电性连接至电极组件。An embodiment of the present application provides a battery cell, including: a housing, an electrode assembly, an elastic member, a top cover and an electrode terminal, the housing has a cavity and an opening communicating with the cavity; the electrode assembly is disposed in the cavity The elastic member includes a first assembly plane and a second assembly plane oppositely arranged, and the first assembly plane is pressed on the electrode assembly; the top cover is connected with the casing and closes the opening; the electrode terminal is set through the top cover and pressed on the On the second assembly plane, the electrode terminal is electrically connected to the electrode assembly through the elastic member.

本申请实施例还提供了一种电池，包括上述电池单体。The embodiment of the present application also provides a battery, including the battery cell described above.

本申请实施例还提供了一种用电装置，包括上述电池。An embodiment of the present application also provides an electric device, including the above-mentioned battery.

在一些实施例中，所述弹性件包括第一平台、第二平台及连接所述第一平台和所述第二平台的中间部，所述第一平台呈板状、并压设在所述电极组件上，所述第二平台呈圆柱状，所述第二平台的中心轴垂直于所述第一平台，所述电极端子压持在所述第二平台上。这样，第一平台和第二平台可以在弹性件上形成平台型结构，通过弹性件上的平台型结构，实现弹性件与电极组件和电极端子之间的平面搭接，而通过设置中间部，可以在第一平台和第二平台之间起到缓冲作用，防止第二平台上的作用力直接传递至第一平台而造成第一平台上出现应力集中。In some embodiments, the elastic member includes a first platform, a second platform and an intermediate portion connecting the first platform and the second platform, the first platform is plate-shaped, and is pressed on the On the electrode assembly, the second platform is cylindrical, the central axis of the second platform is perpendicular to the first platform, and the electrode terminals are pressed on the second platform. In this way, the first platform and the second platform can form a platform-shaped structure on the elastic member. Through the platform-shaped structure on the elastic member, the planar overlap between the elastic member, the electrode assembly and the electrode terminal can be realized, and by setting the middle part, It can act as a buffer between the first platform and the second platform, preventing the force on the second platform from being directly transmitted to the first platform and causing stress concentration on the first platform.

在一些实施例中，所述第一平台为中部围成通孔的环状，所述中间部的一侧环绕所述通孔并与所述通孔的边缘连接，所述中间部的另一侧环绕所述第二平台的外壁与所述第二平台连接。这样，通过在第一平台中部设置通孔，可以使第一平台的主体避开第二平台的位置，避免了第二平台受到的作用力直接作用至第一平台的主体，也可以起到防止第一平台上出现应力集中的作用。In some embodiments, the first platform is in the shape of a ring with a central portion surrounding a through hole, one side of the central portion surrounds the through hole and is connected to the edge of the through hole, and the other side of the central portion An outer wall surrounding the second platform is connected to the second platform. In this way, by providing a through hole in the middle of the first platform, the main body of the first platform can be avoided from the position of the second platform, avoiding the force received by the second platform from directly acting on the main body of the first platform, and preventing The effect of stress concentration occurs on the first platform.

在一些实施例中，所述中间部包括侧壁和顶壁，所述侧壁呈筒状，且所述侧壁的一端与所述通孔的边缘连接，所述顶壁自所述侧壁的另一端、朝向所述侧壁的中心轴弯折延伸呈环状，所述顶壁的内边缘与所述第二平台连接。这样，通过设置筒状的顶壁和环状的侧壁可以在中间部上形成中空结构，有利于中间部发生弹性形变，同时，侧壁的设置，可以在中间部上形成一层平面台阶，可以进一步有利于中间部发生弹性形变。In some embodiments, the middle portion includes a side wall and a top wall, the side wall is cylindrical, and one end of the side wall is connected to the edge of the through hole, and the top wall extends from the side wall The other end of the top wall is bent and extended towards the central axis of the side wall to form a ring, and the inner edge of the top wall is connected to the second platform. In this way, a hollow structure can be formed on the middle part by arranging the cylindrical top wall and the annular side wall, which is conducive to the elastic deformation of the middle part. At the same time, the setting of the side wall can form a plane step on the middle part. Elastic deformation of the middle portion can further be facilitated.

在一些实施例中，所述侧壁的直径沿远离所述第一平台的方向逐渐减小。这样，通过使中间部的侧壁沿远离第一平台的方向呈现为不断收缩的趋势，中间部的侧壁呈现为内部中空的圆台状，从而使得电极端子压持在弹性件上时，中间部的侧壁部分更易发生变形。In some embodiments, the diameter of the sidewall decreases gradually along a direction away from the first platform. In this way, by making the side wall of the middle part exhibit a tendency of shrinking continuously along the direction away from the first platform, the side wall of the middle part presents a hollow circular truncated shape, so that when the electrode terminal is pressed on the elastic member, the middle part The sidewall portion is more prone to deformation.

在一些实施例中，所述第二平台包括连接部和延伸部，所述连接部呈筒状，所述连接部的一侧与所述顶壁的内边缘连接、并与所述侧壁同轴设置，所述延伸部自所述连接部的另一侧、朝向所述连接部的中心轴弯折延伸。这样，通过在第二平台中设置中空的连接部，有利于第二平台的连接部部分发生弹性形变，延伸部则可以作为被电极端子压持的部分。In some embodiments, the second platform includes a connection portion and an extension portion, the connection portion is cylindrical, one side of the connection portion is connected to the inner edge of the top wall, and is the same as the side wall. The shaft is arranged, and the extension part bends and extends from the other side of the connection part toward the central axis of the connection part. In this way, by providing the hollow connection part in the second platform, the elastic deformation of the connection part of the second platform is facilitated, and the extension part can be used as a part pressed by the electrode terminal.

在一些实施例中，所述延伸部上设置有沿所述连接部的轴向延伸的定位孔，所述电极端子部分伸入所述定位孔内、并与所述定位孔的孔壁之间具有间隔。这样，通过在延伸部上设置定位孔，可以在下凸型的电极端子与弹性件装配时，对电极端子起到定位的作用。In some embodiments, the extension part is provided with a positioning hole extending in the axial direction of the connecting part, and the electrode terminal part protrudes into the positioning hole and is between the hole wall of the positioning hole with intervals. In this way, by providing the positioning hole on the extension part, the electrode terminal can be positioned when the downwardly convex electrode terminal is assembled with the elastic member.

在一些实施例中，所述第一平台、所述第二平台和所述中间部为一体成型结构。这样，可以确保弹性件的整体结构强度。In some embodiments, the first platform, the second platform and the middle part are integrally formed. In this way, the overall structural strength of the elastic member can be ensured.

在一些实施例中，所述第一装配平面与所述第二装配平面之间的最大距离小于10毫米。这样，可以在确保弹性件保持弹性形变状态的同时，不影响顶盖与壳体的装配。In some embodiments, the maximum distance between the first assembly plane and the second assembly plane is less than 10 millimeters. In this way, it is possible to ensure that the elastic member remains in an elastically deformed state without affecting the assembly of the top cover and the housing.

在一些实施例中，所述电极组件的直径与所述第一装配平面沿垂直于所述电极组件轴线方向的长度之间的差值大于1毫米且小于11毫米。这样，可以适应电极组件处的空间。In some embodiments, the difference between the diameter of the electrode assembly and the length of the first assembly plane in a direction perpendicular to the axis of the electrode assembly is greater than 1 mm and less than 11 mm. In this way, the space at the electrode assembly can be accommodated.

在一些实施例中，所述第二装配平面沿垂直于所述电极组件轴线方向的长度与所述电极端子的外径之间的差值大于0.5毫米且小于5毫米。这样，可以适应电极端子处的狭小空间。In some embodiments, the difference between the length of the second assembly plane along the direction perpendicular to the axis of the electrode assembly and the outer diameter of the electrode terminal is greater than 0.5 mm and less than 5 mm. In this way, a narrow space at the electrode terminal can be accommodated.

有益效果Beneficial effect

本申请实施例提供的电池单体、电池及用电装置，采用弹性件作为电极组件与电极端子之间的转接部件，可以分别与电极组件和电极端子之间形成平面连接，第一装配平面和第二装配平面可以为弹性件的装配提供定位基础。而在电池单体的顶盖连接壳体后，顶盖上的电极端子压持弹性件的第二装配平面，弹性件受到来自电极端子的压力，向靠近电极组件的方向出现变形，这时，弹性件可以借助自身的弹性，始终保持与电极组件和电极端子之间的紧密接触，从而在电池装配过程中取消了转接部件的焊接工序，避免了转接部件由于焊接而出现的焊渣残留问题，也就避免了由焊渣残留带来的自放电甚至安全风险。The battery cells, batteries, and electrical devices provided in the embodiments of the present application use elastic members as the transition parts between the electrode assembly and the electrode terminal, which can respectively form a plane connection with the electrode assembly and the electrode terminal. The first assembly plane and the second assembly plane can provide a positioning basis for the assembly of the elastic member. After the top cover of the battery cell is connected to the casing, the electrode terminals on the top cover press against the second assembly plane of the elastic member, and the elastic member is deformed toward the electrode assembly under pressure from the electrode terminals. At this time, The elastic member can always maintain close contact with the electrode assembly and the electrode terminal by virtue of its own elasticity, thereby eliminating the welding process of the transfer part during the battery assembly process, and avoiding the welding slag residue of the transfer part due to welding problem, which avoids self-discharge and even safety risks caused by residual welding slag.

附图说明Description of drawings

为一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。One or more embodiments are exemplified by the pictures in the corresponding drawings, these exemplifications do not constitute a limitation to the embodiments, and elements with the same reference numerals in the drawings represent similar elements , unless otherwise stated, the figures in the accompanying drawings do not constitute scale limitations.

图1是本申请实施例提供的电池单体的外观结构示意图；FIG. 1 is a schematic diagram of the appearance and structure of a battery cell provided in an embodiment of the present application;

图2是沿图1中A-A向的剖视结构示意图；Fig. 2 is a schematic cross-sectional structure along the A-A direction in Fig. 1;

图3是图2中B处的放大结构示意图；Fig. 3 is a schematic diagram of an enlarged structure at B in Fig. 2;

图4是本申请实施例提供的电池单体的***结构示意图；Fig. 4 is a schematic diagram of an exploded structure of a battery cell provided in an embodiment of the present application;

图5是本申请实施例提供的顶盖组件处的***结构示意图；Fig. 5 is a schematic diagram of the exploded structure at the top cover assembly provided by the embodiment of the present application;

图6是本申请实施例提供的顶盖组件的主视结构示意图；Fig. 6 is a front structural schematic view of the top cover assembly provided by the embodiment of the present application;

图7是本申请实施例提供的顶盖组件的仰视结构示意图；Fig. 7 is a schematic bottom view of the top cover assembly provided by the embodiment of the present application;

图8是本申请实施例提供的弹性件的立体结构示意图；Fig. 8 is a schematic diagram of the three-dimensional structure of the elastic member provided by the embodiment of the present application;

图9是本申请实施例提供的弹性件的主视结构示意图；Fig. 9 is a schematic front view of the elastic member provided by the embodiment of the present application;

图10是沿图9中C-C向的剖视结构示意图；Fig. 10 is a schematic cross-sectional structural view along the C-C direction in Fig. 9;

图11是本申请实施例提供的弹性件的俯视结构示意图；Fig. 11 is a schematic top view of the elastic member provided by the embodiment of the present application;

图12是本申请实施例提供的弹性件的仰视结构示意图。Fig. 12 is a schematic bottom view of the elastic member provided by the embodiment of the present application.

附图标识：10、壳体；11、空腔；12、开口；20、电极组件；30、弹性件；310、第一平台；311、通孔；320、第二平台；321、连接部；322、延伸部；323、定位孔；330、中间部；331、侧壁；332、顶壁；40、顶盖；50、电极端子；60、塑胶件。Reference signs: 10, shell; 11, cavity; 12, opening; 20, electrode assembly; 30, elastic member; 310, first platform; 311, through hole; 320, second platform; 321, connecting part; 322, extension part; 323, positioning hole; 330, middle part; 331, side wall; 332, top wall; 40, top cover; 50, electrode terminal; 60, plastic part.

本发明的实施方式Embodiments of the present invention

下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to To limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the description of the above drawings are intended to cover a non-exclusive inclusion.

在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number, specificity, or specificity of the indicated technical features. Sequence or primary-secondary relationship. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

在本申请实施例的描述中，术语“多个”指的是两个以上（包括两个），同理，“多组”指的是两组以上（包括两组），“多片”指的是两片以上（包括两片）。In the description of the embodiments of this application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to two or more groups (including two), and "multiple pieces" refers to More than two pieces (including two pieces).

在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical" "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", "Circumferential", etc. indicate the orientation or positional relationship based on the drawings Orientation or positional relationship is only for the convenience of describing the embodiment of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as an implementation of the present application. Example limitations.

在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a fixed connection. Disassembled connection, or integration; it can also be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

电池单体一般包括壳体、电极组件、电极端子、转接部件和顶盖等，电极组件设置在壳体内部，并通过转接部件与电极端子电连接。电极端子设置在顶盖上，用于与外部电路电连接。转接部件是连接电极组件和电极端子的重要部件，同时起到导流作用，转接部件和电极端子通过激光焊接连接，而电极组件通过超声波焊接和转接部件连接。A battery cell generally includes a casing, an electrode assembly, an electrode terminal, a transfer part, a top cover, etc. The electrode assembly is arranged inside the case and is electrically connected to the electrode terminal through the transfer part. The electrode terminals are arranged on the top cover for electrical connection with external circuits. The transfer part is an important part connecting the electrode assembly and the electrode terminal, and at the same time plays a role in guiding the flow. The transfer part and the electrode terminal are connected by laser welding, while the electrode assembly is connected to the transfer part by ultrasonic welding.

这里的壳体与顶盖相互配合、以形成容纳电极组件的内部空间，壳体可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。壳体的形状可以根据电极组件的具体形状和尺寸大小来确定。电极组件为电池单体内部的卷芯，是电池单体中发生电化学反应的部件，电极组件位于壳体内。电极组件由第一极片、第二极片及位于第一极片和第二极片之间的绝缘隔膜一同堆叠或卷绕形成。第一极片和第二极片中的一个为正极片，另一个为负极片，正极片和负极片具有活性物质的部分构成电极组件的主体部，正极片和负极片不具有活性物质的部分各自构成极耳，正极片极耳和负极片极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极片活性物质和负极片活性物质与电解液发生反应，极耳可以方便卷芯与电极端子之间的电连接，以形成电流回路。电极端子为电池单体向外传输电能的部件，电极端子分为正极电极端子和负极电极端子，正极电极端子与正极片极耳电连接，负极电极端子与负极片极耳电连接。转接部件在电池单体中为电性连接电极组件和电极端子的部件。Here, the shell and the top cover cooperate with each other to form an inner space for accommodating the electrode assembly. The shell can be in various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism and so on. The shape of the shell can be determined according to the specific shape and size of the electrode assembly. The electrode assembly is the winding core inside the battery cell, which is the part where the electrochemical reaction occurs in the battery cell, and the electrode assembly is located in the casing. The electrode assembly is formed by stacking or winding a first pole piece, a second pole piece and an insulating membrane between the first pole piece and the second pole piece. One of the first pole piece and the second pole piece is a positive pole piece, and the other is a negative pole piece. The part of the positive pole piece and the negative pole piece with the active material constitutes the main body of the electrode assembly, and the part of the positive pole piece and the negative pole piece that does not have the active material Each of them constitutes a tab, and the positive tab tab and the negative tab tab can be located at one end of the main body or at both ends of the main body. During the charging and discharging process of the battery, the active material of the positive electrode sheet and the active material of the negative electrode sheet react with the electrolyte, and the tabs can facilitate the electrical connection between the winding core and the electrode terminals to form a current loop. The electrode terminal is a component for the battery cell to transmit electric energy to the outside. The electrode terminal is divided into a positive electrode terminal and a negative electrode terminal. The positive electrode terminal is electrically connected to the positive electrode lug, and the negative electrode terminal is electrically connected to the negative electrode lug. The transition part is a part that electrically connects the electrode assembly and the electrode terminal in the battery cell.

但是申请人注意到，目前部分电池单体中使用的转接部件为转接片，转接片的两侧分别与电池的电极组件和电极端子连接，转接片与电极组件和电极端子之间的连接均通过焊接实现，但在转接片焊接过程中，转接片需要预先定位，而细小的转接片的定位较为困难，并且在转接片焊接完成后，在焊接位置处会存在焊渣清除不干净的问题，而焊渣残留会带来自放电甚至安全风险。还有部分电池单体在电极组件与电极端子之间的电连接结构中用到了螺旋弹簧，通过螺旋弹簧的弹力可以使与之相连的部件紧贴另一部件，但是螺旋弹簧在焊接过程中同样不便于定位。另外，螺旋弹簧的过流面积较小，在电池单体中作为电连接结构使用时存在过流温升大的问题，尤其是大容量电池单体。However, the applicant noticed that the adapter parts currently used in some battery cells are adapter sheets, and the two sides of the adapter sheet are respectively connected to the electrode assembly and the electrode terminal of the battery. The connections are all realized by welding, but during the welding process of the adapter piece, the adapter piece needs to be pre-positioned, and the positioning of the small adapter piece is more difficult, and after the welding of the adapter piece is completed, there will be welding at the welding position. The problem of unclean slag removal, and residual welding slag will bring self-discharge and even safety risks. There are also some battery cells that use helical springs in the electrical connection structure between the electrode assembly and the electrode terminals. The elastic force of the helical springs can make the parts connected to it close to another part, but the helical springs are also in the welding process. Not easy to locate. In addition, the coil spring has a relatively small flow area, and when it is used as an electrical connection structure in a battery cell, there is a problem of a large temperature rise over the flow, especially for a large-capacity battery cell.

为了解决转接部件定位困难的问题，申请人发现，可以在转接部件中设计装配平面，以形成与电极端子和电极组件之间的平面连接，这样，转接部件可以通过装配平面与电极端子和电极组件形成平面搭接，方便转接部件的定位。In order to solve the problem of difficult positioning of the transfer part, the applicant found that an assembly plane can be designed in the transfer part to form a plane connection with the electrode terminal and the electrode assembly, so that the transfer part can be connected to the electrode terminal through the assembly plane It forms a plane overlap with the electrode assembly, which facilitates the positioning of the transfer parts.

而为了解决转接部件在焊接后由于焊渣残留带来的自放电甚至安全风险，申请人发现，可以采用具有弹性的部件作为转接部件，借助转接部件自身的弹力，使转接部件始终保持与电极组件和电极端子之间的紧密接触，以实现电极组件和电极端子之间的电连接。In order to solve the self-discharge and even safety risks of the transfer parts after welding due to residual welding slag, the applicant found that an elastic part can be used as the transfer part. Keep close contact with the electrode assembly and the electrode terminal to realize the electrical connection between the electrode assembly and the electrode terminal.

在采用这样的转接部件的电池单体中，转接部件可以与电极组件和电极端子之间形成平面连接，有利于转接部件在装配过程中的定位。而且转接部件的弹性可以使之始终保持与电极组件和电极端子之间的电连接，从而在电池单体组装过程中取消转接部件的焊接工序，进而避免转接部件由于焊接而带来的焊渣残留问题，减少电池单体在使用过程中由焊渣残留导致的自放电问题，以及焊渣刺破隔膜带来的安全风险，提高电池单体的使用可靠性。In a battery cell using such an adapter part, the adapter part can form a planar connection with the electrode assembly and the electrode terminal, which facilitates the positioning of the adapter part during assembly. Moreover, the elasticity of the transfer part can make it always maintain the electrical connection with the electrode assembly and the electrode terminal, thereby canceling the welding process of the transfer part during the battery cell assembly process, thereby avoiding the damage caused by the transfer part due to welding. The problem of welding slag residue reduces the self-discharge problem caused by welding slag residue during the use of the battery cell, and the safety risk caused by welding slag piercing the diaphragm, and improves the reliability of the battery cell.

本申请实施例提供的电池单体可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的电池单体、电池等组成该用电装置的电源***。The battery cells provided in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts. A power supply system comprising the electric device can be composed of the battery cells and batteries disclosed in this application.

此处以圆柱电池单体的正极片与正极电极端子的电连接为例，对本申请实施例公开的电池单体进行说明。如图1至图4所示，本申请实施例公开的电池单体包括壳体10、电极组件20、弹性件30、顶盖40和电极端子50，壳体10具有空腔11以及与空腔11连通的开口12；电极组件20设置在空腔11内；弹性件30包括相对设置的第一装配平面301和第二装配平面302（图9所示），第一装配平面301压设在电极组件20上；顶盖40与壳体10连接、并封闭开口12；电极端子50贯穿顶盖40设置、并压持在第二装配平面302上，电极端子50经弹性件30电性连接至电极组件20。Here, the battery cell disclosed in the embodiment of the present application is described by taking the electrical connection between the positive plate of the cylindrical battery cell and the positive electrode terminal as an example. As shown in FIGS. 1 to 4 , the battery cell disclosed in the embodiment of the present application includes a casing 10 , an electrode assembly 20 , an elastic member 30 , a top cover 40 and an electrode terminal 50 . The casing 10 has a cavity 11 and a 11 connected to the opening 12; the electrode assembly 20 is set in the cavity 11; the elastic member 30 includes a first assembly plane 301 and a second assembly plane 302 (shown in FIG. On the component 20; the top cover 40 is connected to the housing 10 and closes the opening 12; the electrode terminal 50 is set through the top cover 40 and pressed on the second assembly plane 302, and the electrode terminal 50 is electrically connected to the electrode through the elastic member 30 Component 20.

壳体10是用于配合顶盖40以形成电池单体的内部环境的部件，其中，形成的内部环境可以用于容纳电极组件20、电解液以及其他部件。壳体10的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。The casing 10 is a component for matching with the top cover 40 to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the electrode assembly 20 , electrolyte and other components. The housing 10 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.

弹性件30为导电部件，通过弹性件30的导电性实现电极端子50与电极组件20之间的电连接，弹性件30的导电材质可以是多种，比如，铜、铁、铜合金、铁合金等。同时，弹性件30的弹性是指弹性件30在发生形变后，能恢复原来大小和形状的性质，弹性件30的形状可以为蝶形、柱形或者异形。弹性件30的尺寸可以根据电极组件20和电极端子50之间的空间来确定。弹性件30的第一装配平面301和第二装配平面302是指弹性件30上两个相对设置的平面。The elastic member 30 is a conductive component, and the electrical connection between the electrode terminal 50 and the electrode assembly 20 is realized through the conductivity of the elastic member 30. The conductive material of the elastic member 30 can be various, such as copper, iron, copper alloy, iron alloy, etc. . Meanwhile, the elasticity of the elastic member 30 refers to the property that the elastic member 30 can recover its original size and shape after being deformed, and the shape of the elastic member 30 can be a butterfly shape, a cylindrical shape or a special shape. The size of the elastic member 30 may be determined according to the space between the electrode assembly 20 and the electrode terminal 50 . The first assembly plane 301 and the second assembly plane 302 of the elastic member 30 refer to two opposing planes on the elastic member 30 .

顶盖40是指盖合于壳体10的开口12处以将电池单体的内部环境隔绝于外部环境的部件。不限地，顶盖40的形状可以与壳体10的形状相适应以配合壳体10。可选地，顶盖40可以由具有一定硬度和强度的材质支撑，这样，顶盖40在受挤压碰撞时就不易发生形变，使电池单体能够具备更高的结构强度，安全性能也可以有所提高。顶盖40上可以设置有如电极端子50等的功能性部件形成顶盖组件。电极端子50可以用于与电极组件20电连接，以用于输出或输入电池单体的电能。在一些实施例中，顶盖40上还可以设置有用于在电池单体的内部压力或温度达到阈值时泄放内部压力的泄压装置。顶盖40的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。The top cover 40 refers to a component that covers the opening 12 of the casing 10 to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the top cover 40 can be adapted to the shape of the casing 10 to match the casing 10 . Optionally, the top cover 40 can be supported by a material with a certain hardness and strength, so that the top cover 40 is not easy to deform when it is squeezed and collided, so that the battery cell can have higher structural strength, and the safety performance can also be improved. has seen an increase. The top cover 40 may be provided with functional components such as electrode terminals 50 to form a top cover assembly. The electrode terminal 50 may be used to be electrically connected with the electrode assembly 20 for outputting or inputting electric energy of the battery cell. In some embodiments, the top cover 40 may also be provided with a pressure relief device for releasing the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value. The top cover 40 may also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.

如图4至图6所示，在一些实施例中，在顶盖40的内部还可以设置有塑胶件60，塑胶件60可以用于隔离壳体10内的电连接部件与顶盖40，以降低短路的风险。其中，图7为顶盖组件的仰视结构示意图。As shown in FIGS. 4 to 6 , in some embodiments, a plastic part 60 can also be provided inside the top cover 40, and the plastic part 60 can be used to isolate the electrical connection parts in the housing 10 from the top cover 40, so as to Reduce the risk of short circuits. Wherein, FIG. 7 is a schematic bottom view of the top cover assembly.

弹性件30位于电极组件20和电极端子50之间，弹性件30的第一装配平面301压设在电极组件20上，可以实现与电极组件20之间的电连接，电极端子50压持在弹性件30的第二装配平面302上，弹性件30的第二装配平面302与电极端子50之间的接触，可以实现与电极端子50之间的电连接。采用弹性件30作为电极组件20与电极端子50之间的转接部件，可以分别与电极组件20和电极端子50之间形成平面连接，第一装配平面301和第二装配平面302可以为弹性件30的装配提供定位基础。The elastic member 30 is located between the electrode assembly 20 and the electrode terminal 50. The first assembly plane 301 of the elastic member 30 is pressed on the electrode assembly 20 to realize electrical connection with the electrode assembly 20. The electrode terminal 50 is pressed on the elastic On the second assembly plane 302 of the elastic member 30 , the contact between the second assembly plane 302 of the elastic member 30 and the electrode terminal 50 can realize the electrical connection with the electrode terminal 50 . The elastic member 30 is used as the transition part between the electrode assembly 20 and the electrode terminal 50, which can respectively form a planar connection with the electrode assembly 20 and the electrode terminal 50, and the first assembly plane 301 and the second assembly plane 302 can be elastic members The assembly of 30 provides the positioning basis.

而在电池单体的顶盖40连接壳体10后，顶盖40上的电极端子50压持弹性件30的第二装配平面302，弹性件30受到来自电极端子50的压力，向靠近电极组件20的方向出现变形，这时，弹性件30可以借助自身的弹性，始终保持与电极组件20和电极端子50之间的紧密接触，从而在电池装配过程中取消了转接部件的焊接工序，避免了转接部件由于焊接而出现的焊渣残留问题，也就避免了由焊渣残留带来的自放电甚至安全风险。After the top cover 40 of the battery cell is connected to the casing 10, the electrode terminal 50 on the top cover 40 presses the second assembly plane 302 of the elastic member 30, and the elastic member 30 is pressed by the electrode terminal 50 to move closer to the electrode assembly. The direction of 20 is deformed. At this time, the elastic member 30 can always maintain close contact with the electrode assembly 20 and the electrode terminal 50 by virtue of its own elasticity, thereby canceling the welding process of the transfer part during the battery assembly process, avoiding It eliminates the problem of welding slag residue in the transfer parts due to welding, and also avoids self-discharge and even safety risks caused by welding slag residue.

在本申请的一些实施例中，可选地，如图8至图12所示，弹性件30包括第一平台310、第二平台320及连接第一平台310和第二平台320的中间部330，第一平台310呈板状、并压设在电极组件20上，第二平台320呈圆柱状，第二平台320的中心轴垂直于第一平台310，电极端子50压持在第二平台320上。In some embodiments of the present application, optionally, as shown in FIGS. 8 to 12 , the elastic member 30 includes a first platform 310 , a second platform 320 and an intermediate portion 330 connecting the first platform 310 and the second platform 320 , the first platform 310 is plate-shaped, and is pressed on the electrode assembly 20, the second platform 320 is cylindrical, the central axis of the second platform 320 is perpendicular to the first platform 310, and the electrode terminal 50 is pressed on the second platform 320 superior.

弹性件30的第一平台310和第二平台320为设置有装配平面的部分，弹性件30的中间部330为连接第一平台310和第二平台320的部分，第一平台310呈板状指第一平台310的外观与平板类似，第二平台320呈圆柱状指第二平台320的外观呈现为圆柱体形状，第二平台320的中心轴即圆柱体的对称轴。The first platform 310 and the second platform 320 of the elastic member 30 are parts provided with an assembly plane, the middle part 330 of the elastic member 30 is a part connecting the first platform 310 and the second platform 320, and the first platform 310 is a plate-shaped finger. The appearance of the first platform 310 is similar to that of a flat plate. The appearance of the second platform 320 is cylindrical, which means that the appearance of the second platform 320 is in the shape of a cylinder.

第一平台310和第二平台320可以在弹性件30上形成平台型结构，通过弹性件30上的平台型结构，实现弹性件30与电极组件20和电极端子50之间的平面搭接，其中，第一装配平面301为弹性件30的第一平台310压设在电极组件20上的平面，第二装配平面302为弹性件30的第二平台320被电极端子50压持的平面。通过设置中间部330，可以在第一平台310和第二平台320之间起到缓冲作用，防止第二平台320上的作用力直接传递至第一平台310而造成第一平台310上出现应力集中。The first platform 310 and the second platform 320 can form a platform-shaped structure on the elastic member 30, and through the platform-shaped structure on the elastic member 30, the planar overlap between the elastic member 30, the electrode assembly 20 and the electrode terminal 50 can be realized, wherein , the first assembly plane 301 is the plane on which the first platform 310 of the elastic member 30 is pressed on the electrode assembly 20 , and the second assembly plane 302 is the plane on which the second platform 320 of the elastic member 30 is pressed by the electrode terminal 50 . By setting the middle part 330, it can play a buffering role between the first platform 310 and the second platform 320, preventing the force on the second platform 320 from being directly transmitted to the first platform 310 and causing stress concentration on the first platform 310 .

弹性件30上两个平台型结构根据与电极组件20和电极端子50之间的搭接面积，可以采用不同的大小。而基于确保弹性件30置于电极组件20和电极端子50之间时的稳定性，第一平台310可以呈板状设置，第二平台320可以呈圆柱状设置。这里，呈板状设置的第一平台310相当于弹性件30的底座，使弹性件30可以通过第一平台310平稳地压设在电极组件20上，同时，呈板状设置的第一平台310可以确保弹性件30与电极组件20之间具有足够的搭接面积。而呈圆柱状设置的第二平台320则可以适应电极端子50处的有限空间，既能够确保与电极端子50之间的紧密接触，同时又不会占用电极端子50处的空间。The two platform-shaped structures on the elastic member 30 can adopt different sizes according to the overlapping area between the electrode assembly 20 and the electrode terminal 50 . In order to ensure the stability of the elastic member 30 placed between the electrode assembly 20 and the electrode terminal 50 , the first platform 310 can be arranged in a plate shape, and the second platform 320 can be arranged in a cylindrical shape. Here, the first platform 310 arranged in a plate shape is equivalent to the base of the elastic member 30, so that the elastic member 30 can be smoothly pressed on the electrode assembly 20 through the first platform 310. At the same time, the first platform 310 arranged in a plate shape A sufficient overlapping area between the elastic member 30 and the electrode assembly 20 can be ensured. The cylindrical second platform 320 can adapt to the limited space at the electrode terminal 50 , which can ensure close contact with the electrode terminal 50 without occupying the space at the electrode terminal 50 .

在本申请的一些实施例中，可选地，第一平台310为中部围成通孔311的环状，中间部330的一侧环绕通孔311并与通孔311的边缘连接，中间部330的另一侧环绕第二平台320的外壁与第二平台320连接。In some embodiments of the present application, optionally, the first platform 310 is in the form of a ring with the middle part surrounding the through hole 311, one side of the middle part 330 surrounds the through hole 311 and is connected to the edge of the through hole 311, and the middle part 330 The other side surrounds the outer wall of the second platform 320 and is connected with the second platform 320 .

第一平台310为中部围成通孔311的环状，是指第一平台310的中部设置有通孔311，第一平台310的外观呈现为环形板形状，通孔311位于环形形状的中部镂空区域。The first platform 310 is ring-shaped with a through hole 311 in the middle, which means that the middle part of the first platform 310 is provided with a through hole 311. The appearance of the first platform 310 is in the shape of a ring plate, and the through hole 311 is hollowed out in the middle of the ring shape. area.

通过在第一平台310中部设置通孔311，可以使第一平台310的主体避开第二平台320的位置，避免第二平台320受到的作用力直接作用至第一平台310的主体，也可以起到防止第一平台310上出现应力集中的作用。By setting the through hole 311 in the middle of the first platform 310, the main body of the first platform 310 can be avoided from the position of the second platform 320, so as to prevent the force received by the second platform 320 from directly acting on the main body of the first platform 310, or Play a role in preventing stress concentration on the first platform 310 .

在本申请的一些实施例中，可选地，中间部330包括侧壁331和顶壁332，侧壁331呈筒状，且侧壁331的一端与通孔311的边缘连接，顶壁332自侧壁331的另一端、朝向侧壁331的中心轴弯折延伸呈环状，顶壁332的内边缘与第二平台320连接。In some embodiments of the present application, optionally, the middle part 330 includes a side wall 331 and a top wall 332, the side wall 331 is cylindrical, and one end of the side wall 331 is connected to the edge of the through hole 311, and the top wall 332 The other end of the side wall 331 is bent toward the central axis of the side wall 331 to form a ring shape, and the inner edge of the top wall 332 is connected to the second platform 320 .

侧壁331呈筒状指侧壁331的内部中空，及侧壁331的两端具有开口，侧壁331的一端指侧壁331位于开口处的端部，侧壁331的中心轴即筒的对称轴，顶壁332呈环状指顶壁332的中部镂空，呈现为环形形状，顶壁332的中部镂空构成顶壁332的内边缘。The side wall 331 is cylindrical, which means that the interior of the side wall 331 is hollow, and the two ends of the side wall 331 have openings, and one end of the side wall 331 refers to the end of the side wall 331 located at the opening, and the central axis of the side wall 331 is the symmetry of the cylinder. Shaft, the top wall 332 is ring-shaped, which means that the middle part of the top wall 332 is hollowed out, presenting a ring shape, and the middle part of the top wall 332 is hollowed out to form the inner edge of the top wall 332 .

通过设置筒状的顶壁332和环状的侧壁331可以在中间部330上形成中空结构，有利于中间部330发生弹性形变，同时，侧壁331的设置，可以在中间部330上形成一层平面台阶，可以进一步有利于中间部330发生弹性形变。By setting the cylindrical top wall 332 and the annular side wall 331, a hollow structure can be formed on the middle part 330, which is conducive to the elastic deformation of the middle part 330. At the same time, the setting of the side wall 331 can form a hollow structure on the middle part 330. The step in the layer plane can further facilitate the elastic deformation of the middle part 330 .

在本申请的一些实施例中，可选地，侧壁331的直径沿远离第一平台310的方向逐渐减小。In some embodiments of the present application, optionally, the diameter of the side wall 331 gradually decreases along the direction away from the first platform 310 .

远离第一平台310的方向指在垂直于第一平台310板状的方向上远离第一平台310。The direction away from the first platform 310 refers to away from the first platform 310 in a direction perpendicular to the plate shape of the first platform 310 .

通过使中间部330的侧壁331沿远离第一平台310的方向呈现为不断收缩的趋势，中间部330的侧壁331呈现为内部中空的圆台状，从而使得电极端子50压持在弹性件30上时，中间部330的侧壁331部分更易发生变形。另外，相较于呈折角设置的侧壁331，可以节省弹性件30上中间部330的材料。By making the sidewall 331 of the middle part 330 exhibit a tendency to shrink continuously along the direction away from the first platform 310 , the sidewall 331 of the middle part 330 presents a hollow circular frustum shape, so that the electrode terminal 50 is pressed against the elastic member 30 The side wall 331 of the middle part 330 is more likely to be deformed when it is moved upward. In addition, compared with the side wall 331 arranged at an angle, the material of the middle portion 330 on the elastic member 30 can be saved.

在本申请的一些实施例中，可选地，第二平台320包括连接部321和延伸部322，连接部321呈筒状，连接部321的一侧与顶壁332的内边缘连接、并与侧壁331同轴设置，延伸部322自连接部321的另一侧、朝向连接部321的中心轴弯折延伸。In some embodiments of the present application, optionally, the second platform 320 includes a connection part 321 and an extension part 322, the connection part 321 is cylindrical, and one side of the connection part 321 is connected to the inner edge of the top wall 332 and connected to the inner edge of the top wall 332. The side wall 331 is arranged coaxially, and the extension portion 322 is bent and extended from the other side of the connection portion 321 toward the central axis of the connection portion 321 .

同轴设置指连接部321的中心轴与侧壁331的中心轴相同，连接部321的中心轴和侧壁331的中心轴均指筒的对称轴。Coaxial arrangement means that the central axis of the connecting portion 321 is the same as the central axis of the side wall 331 , and both the central axis of the connecting portion 321 and the central axis of the side wall 331 refer to the symmetry axis of the barrel.

通过在第二平台320中设置中空的连接部321，有利于第二平台320的连接部321部分发生弹性形变，而延伸部322可以作为被电极端子50压持的部分。By providing the hollow connection portion 321 in the second platform 320 , the elastic deformation of the connection portion 321 of the second platform 320 is facilitated, and the extension portion 322 can be used as a portion pressed by the electrode terminal 50 .

在本申请的一些实施例中，可选地，延伸部322上设置有沿连接部321的轴向延伸的定位孔323，电极端子50部分伸入定位孔323内、并与定位孔323的孔壁之间具有间隔。In some embodiments of the present application, optionally, the extension part 322 is provided with a positioning hole 323 extending in the axial direction of the connecting part 321, and the electrode terminal 50 partially extends into the positioning hole 323 and is aligned with the positioning hole 323. There are spaces between the walls.

延伸部322的轴向指筒的对称轴方向，定位孔323沿连接部321的轴向延伸即定位孔323的深度方向与连接部321的轴向平行。The axial direction of the extension portion 322 refers to the direction of the symmetric axis of the barrel, and the positioning hole 323 extends along the axial direction of the connecting portion 321 , that is, the depth direction of the positioning hole 323 is parallel to the axial direction of the connecting portion 321 .

通过在延伸部322上设置定位孔323，可以在下凸型的电极端子50与弹性件30装配时，对电极端子50起到定位的作用，由于延伸部322上设置的定位孔323的孔径大于电极端子50的外径，因此，在电极端子50与弹性件30装配时，电极端子50会部分伸入定位孔323内，从而起到为电极端子50定位的作用。此处下凸型的电极端子50指电极端子50具有向电极组件20一侧凸设的部分。By setting the positioning hole 323 on the extension part 322, when the downward convex electrode terminal 50 is assembled with the elastic member 30, the electrode terminal 50 can be positioned. Therefore, when the electrode terminal 50 is assembled with the elastic member 30 , the electrode terminal 50 will partially protrude into the positioning hole 323 , thereby positioning the electrode terminal 50 . Here, the downwardly convex electrode terminal 50 means that the electrode terminal 50 has a portion protruding toward the side of the electrode assembly 20 .

而在平面型的电极端子50与弹性件30装配时，电极端子50则会直接压持在弹性件30的第二平台320上。When the planar electrode terminal 50 is assembled with the elastic member 30 , the electrode terminal 50 will be directly pressed on the second platform 320 of the elastic member 30 .

在本申请的一些实施例中，可选地，第一平台310、第二平台320和中间部330为一体成型结构。In some embodiments of the present application, optionally, the first platform 310 , the second platform 320 and the middle part 330 are integrally formed.

一体成型指第一平台310、第二平台320和中间部330在成型后，彼此之间不存在分隔界面，一体成型的第一平台310、第二平台320和中间部330可以确保弹性件30的整体结构强度。Integral molding means that after the first platform 310, the second platform 320 and the middle part 330 are formed, there is no separating interface between each other, and the integrally formed first platform 310, the second platform 320 and the middle part 330 can ensure the elasticity of the elastic member 30. overall structural strength.

在本申请的一些实施例中，可选地，第一装配平面301与第二装配平面302之间的距离小于10毫米。In some embodiments of the present application, optionally, the distance between the first assembly plane 301 and the second assembly plane 302 is less than 10 millimeters.

第一装配平面301与第二装配平面302之间的距离即二者连线沿电极组件20轴向的长度。The distance between the first assembly plane 301 and the second assembly plane 302 is the length of the line connecting the two along the axial direction of the electrode assembly 20 .

通过将弹性件30沿电极组件20轴向的长度设置为小于10毫米，可以在确保弹性件30保持弹性形变状态的同时，不影响顶盖40与壳体10的装配，使得顶盖40不会因为弹性件30的尺寸过大而无法与壳体10连接在一起。By setting the length of the elastic member 30 along the axial direction of the electrode assembly 20 to be less than 10 mm, it is possible to ensure that the elastic member 30 maintains an elastically deformed state without affecting the assembly of the top cover 40 and the casing 10, so that the top cover 40 will not Because the size of the elastic member 30 is too large, it cannot be connected with the housing 10 .

在本申请的一些实施例中，可选地，电极组件20的直径与第一装配平面301沿垂直于电极组件20轴线方向的长度之间的差值大于1毫米且小于11毫米。In some embodiments of the present application, optionally, the difference between the diameter of the electrode assembly 20 and the length of the first assembly plane 301 along the direction perpendicular to the axis of the electrode assembly 20 is greater than 1 mm and less than 11 mm.

第一装配平面301沿垂直于电极组件20轴线方向的长度，即第一装配平面301与电极组件20贴合的外边缘轮廓的最大长度。The length of the first assembly plane 301 along the direction perpendicular to the axis of the electrode assembly 20 is the maximum length of the outer edge contour of the first assembly plane 301 and the electrode assembly 20 .

通过将第一装配平面301沿垂直于电极组件20轴线方向的长度与电极组件20的直径相匹配，即保持在1毫米至11毫米的差值范围内，可以适应电极组件20处的空间，同时，为了确保弹性件30压设在电极组件20上的平稳性，可以将第一装配平面301沿垂直于电极组件20轴线方向的长度取为较大的值。By matching the length of the first assembly plane 301 along the direction perpendicular to the axis of the electrode assembly 20 to the diameter of the electrode assembly 20, that is, keeping it within a difference range of 1 mm to 11 mm, the space at the electrode assembly 20 can be adapted, and at the same time , in order to ensure the stability of the elastic member 30 being pressed on the electrode assembly 20 , the length of the first assembly plane 301 along the direction perpendicular to the axis of the electrode assembly 20 can be taken as a larger value.

在本申请的一些实施例中，可选地，第二装配平面302沿垂直于电极组件20轴线方向的长度与电极端子50的外径之间的差值大于0.5毫米且小于5毫米。In some embodiments of the present application, optionally, the difference between the length of the second assembly plane 302 along the direction perpendicular to the axis of the electrode assembly 20 and the outer diameter of the electrode terminal 50 is greater than 0.5 mm and less than 5 mm.

第二装配平面302沿垂直于电极组件20轴线方向的长度，即第二装配平面302与电极端子50贴合的外边缘轮廓的最大长度。The length of the second assembly plane 302 along the direction perpendicular to the axis of the electrode assembly 20 is the maximum length of the outer edge contour of the second assembly plane 302 and the electrode terminal 50 .

通过将第二装配平面302沿垂直于电极组件20轴线方向的长度与电极端子50的外径之间的差值，保持在0.5毫米至5毫米范围内，可以适应电极端子50处的狭小空间，同时，为了确保电极端子50与第二装配平面之间的贴合面积，可以将第二装配平面302沿垂直于电极组件20轴线方向的长度取为较大的值。By keeping the difference between the length of the second assembly plane 302 in the direction perpendicular to the axis of the electrode assembly 20 and the outer diameter of the electrode terminal 50 within the range of 0.5 mm to 5 mm, the narrow space at the electrode terminal 50 can be accommodated, At the same time, in order to ensure the bonding area between the electrode terminal 50 and the second assembly plane, the length of the second assembly plane 302 along the direction perpendicular to the axis of the electrode assembly 20 can be taken as a larger value.

本申请实施例还公开了一种电池，包括上述实施例中的电池单体，本申请实施例公开的电池可以但不限用于车辆、船舶或飞行器等用电装置中，可以使用具备本申请公开的电池模组组成该用电装置的电源***。The embodiment of the present application also discloses a battery, including the battery cells in the above embodiments. The battery disclosed in the embodiment of the present application can be used in but not limited to electric devices such as vehicles, ships or aircrafts. The disclosed battery module composes the power supply system of the electrical device.

本申请实施例还公开了一种用电装置，包括上述实施例中的电池，电池用于为用电装置提供电能。本申请实施例公开的用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。The embodiment of the present application also discloses an electric device, including the battery in the above embodiment, and the battery is used to provide electric energy for the electric device. The electric device disclosed in the embodiment of the present application may be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.

根据本申请的一些实施例，本申请提供了一种电池单体，电极组件20设置在壳体10内，电极端子50设置在顶盖40上，顶盖40与壳体10连接，弹性件30位于电极端子50和电极组件20之间，弹性件30包括第一平台310、第二平台320及和连接第一平台310和第二平台320的中间部330，弹性件30的第一平台310呈板状、压设在电极组件20上，弹性件30的第二平台320包括呈筒状的连接部321和与连接部321相连的延伸部322，延伸部322上设置有定位孔323，中间部330包括呈筒状的侧壁331和呈环状的顶壁332，电极端子50压持在弹性件30的第二平台320上，第一装配平面301为第一平台310与电极组件20压设在电极组件20的一面，第二装配平面302为第二平台320被电极端子50压持的一面，电极端子50为下凸型，电极端子50的部分伸入延伸部322的定位孔323内。According to some embodiments of the present application, the present application provides a battery cell, the electrode assembly 20 is arranged in the casing 10, the electrode terminal 50 is arranged on the top cover 40, the top cover 40 is connected with the casing 10, and the elastic member 30 Located between the electrode terminal 50 and the electrode assembly 20, the elastic member 30 includes a first platform 310, a second platform 320 and an intermediate portion 330 connecting the first platform 310 and the second platform 320, the first platform 310 of the elastic member 30 is in the form of Plate-shaped, pressed on the electrode assembly 20, the second platform 320 of the elastic member 30 includes a cylindrical connection part 321 and an extension part 322 connected with the connection part 321, the extension part 322 is provided with a positioning hole 323, the middle part 330 includes a cylindrical side wall 331 and a ring-shaped top wall 332, the electrode terminal 50 is pressed on the second platform 320 of the elastic member 30, and the first assembly plane 301 is for the first platform 310 and the electrode assembly 20 to be pressed. On one side of the electrode assembly 20 , the second assembly plane 302 is the side where the second platform 320 is pressed by the electrode terminal 50 . The electrode terminal 50 is convex downward, and part of the electrode terminal 50 protrudes into the positioning hole 323 of the extension part 322 .

最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit it; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

一种电池单体，其中，包括：A battery cell, comprising:

壳体，具有空腔以及与所述空腔连通的开口；a housing having a cavity and an opening communicating with the cavity;

电极组件，设置在所述空腔内；an electrode assembly disposed within the cavity;

弹性件，包括相对设置的第一装配平面和第二装配平面，所述第一装配平面压设在所述电极组件上；The elastic member includes a first assembly plane and a second assembly plane oppositely arranged, and the first assembly plane is pressed on the electrode assembly;

顶盖，与所述壳体连接、并封闭所述开口；a top cover, connected to the housing and closing the opening;

电极端子，贯穿所述顶盖设置、并压持在所述第二装配平面上，所述电极端子经所述弹性件电性连接至所述电极组件。The electrode terminal is arranged through the top cover and pressed on the second assembly plane, and the electrode terminal is electrically connected to the electrode assembly through the elastic member.
根据权利要求1所述的电池单体，其中：The battery cell according to claim 1, wherein:

所述弹性件包括第一平台、第二平台及连接所述第一平台和所述第二平台的中间部，所述第一平台呈板状、并压设在所述电极组件上，所述第二平台呈圆柱状，所述第二平台的中心轴垂直于所述第一平台，所述电极端子压持在所述第二平台上。The elastic member includes a first platform, a second platform and an intermediate portion connecting the first platform and the second platform, the first platform is plate-shaped and pressed on the electrode assembly, the The second platform is cylindrical, the central axis of the second platform is perpendicular to the first platform, and the electrode terminals are pressed on the second platform.
根据权利要求2所述的电池单体，其中：The battery cell according to claim 2, wherein:

所述第一平台为中部围成通孔的环状，所述中间部的一侧环绕所述通孔并与所述通孔的边缘连接，所述中间部的另一侧环绕所述第二平台的外壁与所述第二平台连接。The first platform is in the form of a ring with a middle part surrounding a through hole, one side of the middle part surrounds the through hole and is connected to the edge of the through hole, and the other side of the middle part surrounds the second The outer wall of the platform is connected to the second platform.
根据权利要求2或3所述的电池单体，其中：The battery cell according to claim 2 or 3, wherein:

所述中间部包括侧壁和顶壁，所述侧壁呈筒状，且所述侧壁的一端与所述通孔的边缘连接，所述顶壁自所述侧壁的另一端、朝向所述侧壁的中心轴弯折延伸呈环状，所述顶壁的内边缘与所述第二平台连接。The middle part includes a side wall and a top wall, the side wall is cylindrical, and one end of the side wall is connected to the edge of the through hole, and the top wall is from the other end of the side wall toward the The central axis of the side wall is bent and extended to form a ring, and the inner edge of the top wall is connected to the second platform.
根据权利要求4所述的电池单体，其中：The battery cell according to claim 4, wherein:

所述侧壁的直径沿远离所述第一平台的方向逐渐减小。The diameter of the side wall decreases gradually along the direction away from the first platform.
根据权利要求2至5任一项所述的电池单体，其中：The battery cell according to any one of claims 2 to 5, wherein:

所述第二平台包括连接部和延伸部，所述连接部呈筒状，所述连接部的一侧与所述顶壁的内边缘连接、并与所述侧壁同轴设置，所述延伸部自所述连接部的另一侧、朝向所述连接部的中心轴弯折延伸。The second platform includes a connection portion and an extension portion, the connection portion is cylindrical, one side of the connection portion is connected to the inner edge of the top wall and coaxially arranged with the side wall, the extension The part bends and extends from the other side of the connecting part towards the central axis of the connecting part.
根据权利要求6所述的电池单体，其中：The battery cell according to claim 6, wherein:

所述延伸部上设置有沿所述连接部的轴向延伸的定位孔，所述电极端子部分伸入所述定位孔内、并与所述定位孔的孔壁之间具有间隔。A positioning hole extending along the axial direction of the connecting part is provided on the extension part, and the electrode terminal part protrudes into the positioning hole and has a space between the hole wall of the positioning hole.
根据权利要求2至7任一项所述的电池单体，其中：The battery cell according to any one of claims 2 to 7, wherein:

所述第一平台、所述第二平台和所述中间部为一体成型结构。The first platform, the second platform and the middle part are integrally formed.
根据权利要求1至8任一项所述的电池单体，其中：The battery cell according to any one of claims 1 to 8, wherein:

所述第一装配平面与所述第二装配平面之间的最大距离小于10毫米。The maximum distance between the first assembly plane and the second assembly plane is less than 10 millimeters.
根据权利要求1至9任一项所述的电池单体，其中：The battery cell according to any one of claims 1 to 9, wherein:

所述电极组件的直径与所述第一装配平面沿垂直于所述电极组件轴线方向的长度之间的差值大于1毫米且小于11毫米。A difference between the diameter of the electrode assembly and the length of the first assembly plane along a direction perpendicular to the axis of the electrode assembly is greater than 1 mm and less than 11 mm.
根据权利要求1至10任一项所述的电池单体，其中：The battery cell according to any one of claims 1 to 10, wherein:

所述第二装配平面沿垂直于所述电极组件轴线方向的长度与所述电极端子的外径之间的差值大于0.5毫米且小于5毫米。The difference between the length of the second assembly plane along the direction perpendicular to the axis of the electrode assembly and the outer diameter of the electrode terminal is greater than 0.5 mm and less than 5 mm.
一种电池，其中，包括：A battery, comprising:

如权利要求1至11任一项所述的电池单体。The battery cell according to any one of claims 1 to 11.
一种用电装置，其中，包括：An electrical device, comprising:

如权利要求12所述的电池。A battery as claimed in claim 12.