Battery monomer, battery, power utilization device and energy storage device

Abstract

The utility model discloses a battery monomer, a battery, a power utilization device and an energy storage device. The battery monomer comprises a shell, and an electrode terminal is formed on the shell; an electrode assembly; a connection member for connecting the electrode assembly and the electrode terminal; the connecting part is provided with a first surface and a second surface which are located on the two opposite sides in the thickness direction of the connecting part. The convex structure is arranged on the body, the convex structure comprises a convex part formed on the side of the first surface and a concave part formed on the side of the second surface, the convex structure comprises an end wall and a side wall, the side wall is connected between the end wall and the body, a first transition area is formed at the connecting corner position of the side wall located on the second surface and the body, and a second transition area is formed at the connecting corner position. A second transition area is formed at the connecting corner position of the side wall and the end wall of the first surface; and a spacer layer attached to at least one of the first transition region and the second transition region. By means of the battery single body assembling and feeding device, in the battery single body assembling and feeding process, the bad situation that the connecting parts are clamped is not prone to occurring, and therefore the assembling efficiency of the battery single bodies is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery cells, batteries, electrical devices and energy storage devices. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In the production and assembly of battery cells, connecting parts are needed to connect the electrode assembly with the electrode terminal. When assembling the connecting parts, the connecting parts may get stuck, affecting the processing and assembly efficiency. How to improve the assembly efficiency of connecting parts is one of the research topics in the industry. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery cell, a battery, an electrical device and an energy storage device which can reduce the possibility of material jamming and thus improve assembly efficiency.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a battery cell, comprising: a shell having an electrode terminal formed thereon; an electrode assembly housed in the shell; a connecting component for connecting the electrode assembly to the electrode terminal; the connecting component having a first surface and a second surface located on opposite sides along its thickness direction, the connecting component comprising: a body; a protruding structure arranged on the body, the protruding structure comprising a convex portion formed on the first surface side and a concave portion formed on the second surface side, the protruding structure comprising an end wall and a side wall, the side wall being connected between the end wall and the body, wherein a connecting corner position of the side wall and the body located on the second surface constitutes a first transition region, and a connecting corner position of the side wall and the end wall located on the first surface constitutes a second transition region; and a spacer layer attached to at least one of the first transition region and the second transition region.

[0007] Since at least one of the first transition region and the second transition region of the connecting component is provided with a spacer layer, when the connecting components are stacked, the first transition region of each connecting component and the second transition region of the adjacent connecting portion are separated by the spacer layer. Therefore, whether the spacer layer is provided in the first transition region or the second transition region, it is equivalent to locally thickening the contact part of the side wall. After the thickening, the inner diameter of the protruding structure is locally reduced, and the actual contact area between two adjacent connecting components is reduced, thereby reducing the risk of adjacent connecting components getting stuck and unable to be separated by gravity, reducing the undesirable number of connecting components picked up during the assembly and loading of the connecting components, and helping to improve the stability of the connecting components during assembly and loading. This reduces the extra time spent on solving the problem of stuck materials during the assembly process, thereby improving the assembly efficiency of the connecting components and the efficiency of assembling battery cells.

[0008] In some embodiments, the surface roughness of the spacer layer is smaller than the surface roughness of the body.

[0009] As a result, the contact surfaces of adjacent connecting parts are smoother and the friction is smaller, thereby reducing the risk of adjacent connecting parts getting stuck with each other.

[0010] In some embodiments, a connecting corner between the side wall and the body on the second surface has a first transition fillet, the first transition region includes the first transition fillet, and the spacer layer is attached to at least the first transition fillet.

[0011] Since the connecting corner between the side wall and the body has a first transition fillet, and the spacer layer is attached to at least the first transition fillet, it helps to further reduce the contact area and reduce the risk of adjacent connecting parts getting stuck with each other.

[0012] In some embodiments, the spacer layer covers the first transition fillet and at least covers 50% of the total surface area of ​​the first transition fillet.

[0013] Thus, adjacent connecting components can be spaced apart within a sufficiently large range, so that adjacent connecting components can be stably stacked via the spacers, thereby reducing the risk of adjacent connecting components being stuck to each other.

[0014] In some embodiments, when viewed along the thickness direction, the side wall is in a closed ring shape.

[0015] According to the application scenario of the connecting component, there is a case where the side wall forms a closed ring. In this case, by providing a spacing layer, it is helpful to reduce the risk of adjacent connecting components getting stuck and difficult to separate.

[0016] In some embodiments, the spacer layer covers the first transition fillet in the entire circumference of the sidewall.

[0017] Since the spacer layer is continuously distributed in the entire circumferential direction, there is a spacer layer between adjacent connecting components on the entire circumference, which can effectively reduce the friction of the contact surface between the adjacent connecting components and further reduce the risk of adjacent connecting components getting stuck and difficult to separate.

[0018] In some embodiments, the spacer layer is provided with a plurality of sections, and the plurality of sections of the spacer layer are distributed at intervals along the entire circumference of the side wall.

[0019] Since the spacer layer can be distributed discontinuously in the entire circumferential direction, under the premise of meeting the minimum attachment area of ​​50%, it can also achieve a suitable technical effect of reducing friction, reduce the risk of adjacent connected parts getting stuck and difficult to separate, and at the same time save the material used for the spacer layer.

[0020] In some embodiments, the sidewall is linear when viewed along the thickness direction.

[0021] Depending on the application scenario of the connecting component, there is a situation where the side wall forms a linear shape. In this case, by providing a spacing layer, it is beneficial to control the gap between adjacent connecting components and reduce the risk of material jamming of the connecting component.

[0022] In some embodiments, the side wall includes a first side wall and a second side wall located on opposite sides of the end wall along a first direction, the first side wall and the second side wall extend along a second direction respectively, and the first direction is perpendicular to the second direction and is perpendicular to the thickness direction.

[0023] Depending on the application scenario of the connecting component, there may be a case where two side walls are provided. In this case, by respectively providing a spacer layer for the two side walls, it is helpful to reduce the risk of adjacent connecting components getting stuck and being difficult to separate.

[0024] In some embodiments, the spacer layer covers the first transition fillet along the entire length of the sidewall.

[0025] Since the spacer layer covers the entire length of the two side walls, the stability of the connection components when stacked can be increased, and the risk of adjacent connection components being stuck and difficult to separate can be reduced.

[0026] In some embodiments, the spacer layer is provided with a plurality of sections, and the plurality of sections of the spacer layer are spaced apart and distributed along the sidewall.

[0027] Since the attached spacer layers can be spaced apart along the first direction, the technical effect of reducing friction can be achieved while meeting the 50% minimum attachment area, thereby reducing the risk of adjacent connecting parts getting stuck and unable to be separated, while also saving spacer layer materials.

[0028] In some embodiments, the spacer layer is releasably attached to the second transition region.

[0029] In the technical solution of the embodiment of the present application, a spacer layer is attached to the second transition region. Since the spacer layer may melt during subsequent processing and welding, which may have adverse effects on the battery, the connection between the spacer layer and the second transition region is removable and does not affect subsequent processing and assembly.

[0030] In some embodiments, the spacer layer is attached to the first transition region and / or the second transition region by coating, bonding, injection molding or clamping; the spacer layer is a polyethylene terephthalate layer, a polypropylene layer or a polytetrafluoroethylene layer.

[0031] This makes it possible to easily attach the spacer layer and also to peel it off during subsequent processing.

[0032] In the technical solution of the embodiment of the present application, the polyethylene terephthalate layer (ie PET), the polypropylene layer (ie PP) or the perfluoroalkoxy resin (ie PFA) has a wide source, a low friction coefficient, is an insulating material, and is suitable for use as a spacer layer.

[0033] In some embodiments, the thickness of the spacer layer is 0.01 mm to 0.5 mm.

[0034] Since a spacer layer of suitable thickness is attached, it helps to reduce the risk of adjacent connecting components getting stuck and difficult to separate, and also reduces the possibility of excessive gaps or poor connections between the connecting components and the electrode assembly due to the presence of the spacer layer.

[0035] In some embodiments, the angle between the side wall and the body is greater than 90° and less than 180°.

[0036] In the technical solution of the embodiment of the present application, the protruding structure may be in the shape of a convex hull, and the angle between the side wall of the protruding structure and the main body is greater than 90° and less than 180°.

[0037] In some embodiments, when one of the connecting components is stacked with another of the connecting components along the thickness direction, the one of the connecting components is in contact with the other of the connecting components via the spacer layer.

[0038] Since the connecting components are stacked in the thickness direction during loading, adjacent connecting components are in contact via the spacer layer during stacking. Therefore, the contact via the spacer layer can effectively reduce the friction between the two connecting components and reduce the risk of the connecting components getting stuck during loading.

[0039] In some embodiments, the body is connected to the electrode assembly, and the protruding structure is connected to the electrode terminal.

[0040] In the technical solution of the embodiment of the present application, when assembling the battery cell, the body of the connecting component is connected to the electrode assembly, and the protruding structure of the connecting component is connected to the electrode terminal. The electrode assembly and the electrode terminal are connected via the connecting component.

[0041] In some embodiments, the shell includes: a shell having an opening; and an end cover connected to the shell and closing the opening, the end cover having an electrode lead-out hole, and the electrode terminal is formed on the end cover; the protruding structure is at least partially connected to the electrode terminal formed on the end cover through the electrode lead-out hole along the thickness direction.

[0042] In the technical solution of the embodiment of the present application, the connecting component can be connected to the electrode terminal through the electrode lead-out hole on the end cover to lead out the electrical energy of the electrode assembly in the shell through the electrode terminal.

[0043] A second aspect of the embodiments of the present application provides a battery, comprising a battery case and at least one battery cell as described in the first aspect of the embodiments of the present application, wherein the battery case accommodates the battery cell.

[0044] Since the battery includes battery cells, and the battery cells are not prone to the problem of connection component jamming during the production process, the assembly speed of the entire battery can be increased, thereby improving the production efficiency of the battery.

[0045] A third aspect of the embodiments of the present application provides an electrical device, which includes a battery cell as described in the first aspect of the embodiments of the present application or a battery as described in the second aspect of the embodiments of the present application for providing electrical energy.

[0046] Since the electric device includes a battery cell or a battery with high assembly efficiency, the production efficiency of the electric device can be effectively improved.

[0047] A fourth aspect of the embodiments of the present application provides an energy storage device, comprising the battery described in the second aspect of the embodiments of the present application, wherein the battery is capable of storing electrical energy and providing electrical energy.

[0048] Since the energy storage device includes batteries with high assembly efficiency, the production efficiency of the energy storage device can be effectively improved.

[0049] Utility Model Effect

[0050] Through the present application, it is possible to prevent the undesirable situation of connecting components getting stuck during the battery cell assembly and loading process, thereby improving the assembly efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0052] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0053] Figure 2 A three-dimensional exploded schematic diagram of a battery provided in some embodiments of the present application;

[0054] Figure 3 A three-dimensional exploded schematic diagram of a battery cell provided in some embodiments of the present application;

[0055] Figure 4 A schematic diagram of the structure of connecting components in a stacked state provided for some embodiments of the present application;

[0056] Figure 5 for Figure 4 A top view of

[0057] Figure 6 for Figure 5 The cross-sectional view along the AA direction;

[0058] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0059] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0060] Fig. 9 A schematic diagram of the structure of connecting components in a stacked state provided for other embodiments of the present application;

[0061] Fig.10 for Fig. 9 A partial cross-sectional view of a first transition radius of a connecting component in a stacked state.

[0062] Fig.11 A schematic diagram of the structure of an energy storage device provided for some embodiments of the present application.

[0063] Description of Reference Numerals

[0064] 1000-vehicle, 2000-energy storage device, 100-battery, 100A-battery case, 101-battery cell, 102-electrode assembly, 103-electrode terminal, 104-electrode lead-out hole, 105-housing, 106-end cover, 107-shell, 108-opening, 200-controller, 300-motor, 400-connecting component, 401-first surface, 402-second surface, 403-main body, 404-end wall, 405-raised structure, 410-first transition fillet, 411-first transition region; 420-second transition region, 430-spacer, 500-side wall, 501-first side wall, 502-second side wall, 600-convex portion, 700-concave portion. DETAILED DESCRIPTION

[0065] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of the present application, the technical terms "first", "second", "third", "fourth", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0068] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "thickness", "up", "down", "left", "right", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0072] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0073] Below, this application is described in detail.

[0074] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0075] During the assembly and manufacturing process of the battery cell, a connecting component is required to electrically connect the electrode assembly in the housing assembly with the electrode terminals on the housing assembly, so that the battery cell can input or output electrical energy through the connecting component.

[0076] In some scenarios, the connection components are stacked and placed in the material collection area, and the connection components can be clamped from the material collection area by a clamp device for subsequent welding and other operations. Sometimes the connection components include a protruding structure. When multiple connection components are stacked together, due to the gravity of the connection components themselves and the compression between the connection components, the protruding structure may be deformed to a certain extent, or the convex part of the protruding structure of the connection component at the bottom may extend to a greater extent into the concave part of the protruding structure of the connection component at the top, thereby causing two adjacent connection components to be stuck to each other, resulting in a material jam, that is, the adjacent connection components cannot be separated from each other under the action of gravity. Once the material jam occurs, the clamping device may clamp two or more connection components at a time when clamping the connection components. At this time, it is necessary to stop the assembly of the battery cell, and manually remove the excess connection components before continuing the subsequent assembly operation, which seriously affects the assembly efficiency of the battery cell.

[0077] In the related art, some protrusions are formed on the side walls of the protruding structure to reduce the possibility of jamming when the connecting components are stacked. However, forming new protrusions on the protruding structure not only greatly increases the process cost, but also easily forms burrs during the processing, which may cause damage to the electrode assembly inside the battery cell and affect the reliability of the battery cell.

[0078] In view of the problems existing in the above-mentioned related technologies, the present application proposes a battery cell. The battery cell comprises: a shell, on which an electrode terminal is formed; an electrode assembly, which is contained in the shell; a connecting component, which is used to connect the electrode assembly and the electrode terminal; the connecting component has a first surface and a second surface located on opposite sides along its thickness direction, and the connecting component comprises: a body; a protruding structure, which is arranged on the body, the protruding structure comprises a convex part formed on the first surface side and a concave part formed on the second surface side, the protruding structure comprises an end wall and a side wall, and the side wall is connected between the end wall and the body, wherein the connecting corner position of the side wall located on the second surface and the body constitutes a first transition region, and the connecting corner position of the side wall located on the first surface and the end wall constitutes a second transition region; a spacer layer, which is attached to at least one of the first transition region and the second transition region.

[0079] Since at least one of the first transition area and the second transition area of ​​the connecting part is provided with a spacer layer, when the connecting parts are stacked, the first transition area of ​​each connecting part and the second transition area of ​​the adjacent connecting part are separated by the spacer layer. Therefore, whether the spacer layer is provided in the first transition area or the second transition area, it is equivalent to locally thickening the contact part of the side wall. After the thickening, the inner diameter of the protruding structure is locally reduced, and the actual contact area between the two adjacent connecting parts is reduced, thereby reducing the risk of adjacent connecting parts being stuck and unable to be separated by gravity, reducing the undesirable number of connecting parts picked up during the assembly and loading of the connecting parts, and helping to improve the stability of the connecting parts during assembly and loading. This reduces the extra time spent on solving the problem of stuck materials during the assembly process, thereby improving the assembly efficiency of the connecting parts and the efficiency of assembling battery cells. .

[0080] An embodiment of the present application also provides a battery pack including the above-mentioned battery.

[0081] The embodiment of the present application also provides an electric device including the above-mentioned battery or battery pack for providing electric energy, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0082] An embodiment of the present application also provides an energy storage device including the above-mentioned battery or battery pack.

[0083] In the following embodiments, for the convenience of description, an electric device according to an embodiment of the present application is taken as an example of a vehicle 1000. The following is a description with reference to the accompanying drawings.

[0084] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating, and operating power requirements of the vehicle 1000 during driving.

[0085] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0086] Figure 2 and a three-dimensional exploded schematic diagram of a battery 100 provided in an embodiment of the present application. In an embodiment of the present application, Figure 2 As shown, the battery 100 houses at least one battery cell 101 .

[0087] In the battery 100, there can be multiple battery cells 101, and the multiple battery cells 101 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 101 are both connected in series and in parallel. Multiple battery cells 101 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 101 is placed in the storage space of the battery box 100A (including the bottom plate and the cover); of course, the battery 100 can also be a battery module formed by connecting multiple battery cells 101 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and are contained in the storage space of the battery box 100A. The battery 100 may also include other structures. For example, the battery 100 may also include a converging component for realizing electrical connection between multiple battery cells 101.

[0088] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0089] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0090] Below, refer to Figures 3 to 11 Some embodiments of the present application are described in detail.

[0091] Figure 3 A three-dimensional exploded schematic diagram of a battery cell provided in some embodiments of the present application; Figure 4 A schematic diagram of the structure of connecting components in a stacked state provided for some embodiments of the present application; Figure 5 for Figure 4 A top view of Figure 6 for Figure 5 The cross-sectional view along the AA direction; Figure 7 for Figure 6 A partial enlarged view of point B in the middle; Figure 8 for Figure 7 A partial enlarged view of point C in the middle; Fig. 9A schematic diagram of the structure of connecting components in a stacked state provided in other embodiments of the present application; Fig.10 for Fig. 9 A partial cross-sectional view of a first transition fillet of a connecting component in a stacked state is shown. Fig.11 A schematic diagram of the structure of an energy storage device provided for some embodiments of the present application.

[0092] In some embodiments of the present application, for the convenience of description, the thickness direction, the first direction and the second direction are set, such as Figure 4 , Fig. 9 As shown by the arrows in the middle, the thickness direction is represented by the arrow Z direction, the first direction is represented by the arrow X direction, and the second direction is represented by the arrow Y direction. In the figure, the thickness direction, the first direction, and the second direction are mutually perpendicular to each other for illustration, but depending on the situation, they may not be mutually perpendicular to each other.

[0093] like Figure 3 As shown, the first aspect of the embodiment of the present application provides a battery cell 101, comprising: a shell 105, on which an electrode terminal 103 is formed; an electrode assembly 102, which is accommodated in the shell 105; a connecting component 400, which is used to connect the electrode assembly 102 and the electrode terminal 103; the connecting component 400 has a first surface 401 and a second surface 402 located on opposite sides along its thickness direction (Z-axis direction), and the connecting component 400 includes: a body 403; a protruding structure 405, which is arranged on the body 403, and the protruding structure 405 includes a protruding structure formed on the first surface The side convex portion 600 of the surface 401 and the concave portion 700 formed on the side of the second surface 402, the protrusion structure 405 includes an end wall 404 and a side wall 500, the side wall 500 is connected between the end wall 404 and the main body 403, wherein the connecting corner position of the side wall 500 and the main body 403 located on the second surface 402 constitutes a first transition area 411, and the connecting corner position of the side wall 500 and the end wall 404 located on the first surface 401 constitutes a second transition area 420; a spacer layer 430 is attached to at least one of the first transition area 411 and the second transition area 420.

[0094] The battery cell 101 refers to a basic unit that can realize the mutual conversion between chemical energy and electrical energy, and can be used to make a battery, so as to supply power to an electrical device or an energy storage device. The battery cell 101 can be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after the battery cell 101 is discharged and continue to be used.

[0095] The battery cell 101 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0096] As an example, the battery cell 101 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present application.

[0097] In some embodiments, the battery cell 101 further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0098] In the embodiments of the present application, Figure 3 As shown, the battery cell 101 includes an electrode assembly 102. Although not shown, the electrode assembly 102 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 101, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through.

[0099] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0100] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0101] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel or titanium with a silver surface treatment may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0102] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0103] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, or a foamed alloy. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0104] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0105] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel or titanium with a silver surface treatment may be used. The composite current collector may include a polymer material base and a metal layer. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, or a foamed alloy. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0106] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0107] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0108] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0109] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0110] In some embodiments, the electrode assembly 102 is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0111] In some embodiments, the electrode assembly 102 is a laminate structure.

[0112] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0113] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0114] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0115] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0116] As an example, the separator may be disposed continuously, and disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0117] In some embodiments, the shape of the electrode assembly 102 can be cylindrical, flat, or polygonal.

[0118] In some embodiments, the electrode assembly 102 is provided with tabs, which can conduct current from the electrode assembly 102. The tabs include a positive tab and a negative tab.

[0119] In the embodiments of the present application, Figure 3 As shown, the housing 105 is used to encapsulate the electrode assembly 102 and the electrolyte and other components. The housing 105 includes a shell 107, and the shell 107 is formed with an opening 108; the end cap 106 is connected to the shell 107 and closes the opening 108 to form a closed space for accommodating the electrode assembly 102 and the electrolyte and other substances. The shell 107 may be provided with one or more openings. One or more end caps 106 may also be provided.

[0120] An electrode lead-out hole 104 is formed on the end cap 106, and at least one electrode terminal 103 is formed on the end cap 106; the electrode terminal 103 is electrically connected to the pole tab. The electrode terminal 103 can be directly connected to the pole tab, or indirectly connected to the pole tab through a transition component. The electrode terminal 103 can be arranged on the end cap 106, or on the shell 107. The protruding structure 405 is at least partially connected to the electrode terminal 103 formed on the end cap 106 through the electrode lead-out hole 104 in the thickness direction. The connecting component 400 can be connected to the electrode terminal 103 through the electrode lead-out hole 104 on the end cap 106, so as to lead out the electric energy of the electrode assembly 102 in the shell 107 through the electrode terminal 103.

[0121] As an example, the housing 105 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0122] In some specific embodiments, Figure 3 As shown, two electrode terminals 103 are disposed on the housing 105 , each electrode terminal 103 is connected to a connecting component 400 , a body 403 in the connecting component 400 is connected to the electrode assembly 102 , and a protruding structure 405 is connected to the electrode terminal 103 .

[0123] A protruding structure 405 is disposed on the main body 403. The protruding structure 405 includes a protruding portion 600 formed on the side of the first surface 401 and a recessed portion 700 formed on the side of the second surface 402. The protruding structure 405 includes an end wall 404 and a side wall 500. The side wall 500 is connected between the end wall 404 and the main body 403, wherein the corner position where the side wall 500 located on the second surface 402 is connected to the main body 403 constitutes a first transition region 411, and the corner position where the side wall 500 located on the first surface 401 is connected to the end wall 404 constitutes a second transition region 420; and a spacer layer 430 is attached to at least one of the first transition region 411 and the second transition region 420.

[0124] The body 403 of the connecting component 400 is provided with a protruding structure 405. Figure 6 As shown, the protrusion structure 405 forms a protrusion 600 on the first surface 401 side along the thickness direction (Z-axis direction), and forms a concave portion 700 on the second surface 402 side, and the positions of the protrusion 600 and the concave portion 700 correspond to each other. The first surface 401 side of the end wall 404 in the protrusion structure 405 is connected to the electrode terminal 103, and the second surface 402 side of the body 403 is connected to the electrode assembly 102.

[0125] In some embodiments, Figure 8 , Fig.10As shown, the connecting corner position of the side wall 500 and the body 403 located on the second surface 402 constitutes a first transition area 411 , and the connecting corner position of the side wall 500 and the end wall 404 located on the first surface 401 constitutes a second transition area 420 .

[0126] In some specific embodiments, Figure 8 , Fig.10 As shown, the connecting corner between the side wall 500 and the body 403 on the second surface has a first transition fillet 410 , the first transition region includes the first transition fillet 410 , and the spacer layer 430 is at least attached to the first transition fillet 410 .

[0127] The transition fillet here can be achieved by bending or rounding. In some embodiments, the chamfer radius is in the range of 0.3 mm to 2.5 mm.

[0128] Since the connecting corner of the side wall 500 and the body 403 has the first transition fillet 410, the spacer layer 430 is at least attached to the first transition fillet 410, and the spacer layer 430 helps to further reduce the contact area and reduce the risk of adjacent connecting parts getting stuck to each other. In addition, the first transition fillet 410, as a contact surface, its own curvature helps the spacer layer 430 to fit with the first transition fillet 410 to improve the attachment strength and adhesion effect of the spacer layer 430, so that the connecting parts can be stably stacked, and the risk of adjacent connecting parts getting stuck to each other can be further reduced.

[0129] like Figure 4 , Fig. 9As shown, when the connecting component 400 is assembled with the battery cell 101, there is a situation of stacking. When stacking, the side walls 500 in the adjacent protruding structures 405 form a contact surface. Under the influence of the gravity of the connecting component 400 itself and the external force of the material extrusion, they may get stuck with each other. Since a spacer layer 430 is provided in at least one of the first transition area and the second transition area 420 of the connecting component, when stacking, the first transition area of ​​each connecting component 400 and the second transition area 420 of the adjacent connecting part are separated by a spacer layer, so a spacer layer 430 is provided in the first transition area and / or the second transition area 420 of the connecting component 400. Whether the spacer layer 430 is arranged in the first transition region or the second transition region 420, it is equivalent to locally thickening the contact part of the side wall 500. After the thickening, the inner diameter of the protruding structure 405 is locally reduced, and the actual contact area between two adjacent connecting parts 400 is reduced, thereby reducing the risk of adjacent connecting parts 400 getting stuck and unable to be separated by gravity, reducing the undesirable number of connecting parts 400 picked up during the assembly and loading of the connecting parts 400, and helping to improve the stability of the connecting parts 400 during the installation and loading. This reduces the extra time spent on solving the problem of stuck materials during the assembly process, thereby improving the assembly efficiency of the connecting parts 400 and the efficiency of assembling the battery cells 101.

[0130] Alternatively, if Figure 7 , Figure 8 and Fig.10 Attaching the spacer layer 430 in the first transition region 411 or the first transition fillet 410 has the effect of increasing the wall thickness in the first transition region alone, reducing the distance between the side walls 500, so that the contact surface position with the adjacent connecting component 400 at this position moves upward along the thickness direction (Z-axis direction), reducing the contact surface area, reducing the friction at the contact surface, and reducing the risk of mutual jamming.

[0131] Optionally, a spacer layer 430 is attached to the second transition region 420. Although not shown in the figure, the outer diameter of the protruding structure 405 is increased, which can also move the contact surface position of the connecting component 400 stacked above upward in the thickness direction (Z-axis direction), thereby reducing the contact surface area and reducing the risk of mutual jamming.

[0132] Optionally, a spacer layer 430 is attached to both the first transition region and the second transition region 420 , which can further reduce the contact surface area and the risk of mutual jamming.

[0133] In some embodiments, the surface roughness of the spacer layer 430 is smaller than that of the body 403. The surface roughness refers to the profile arithmetic mean deviation Ra recorded in the standard document GB / T1031-2009 "Product Geometry Technical Specification (GPS) Surface Structure Profile Method Surface Roughness Parameters and Values". Since the spacer layer 430 has a smaller Ra than the body 403, the contact surface of the spacer layer between adjacent connecting parts 400 is smoother, and the friction force is smaller than the connecting parts themselves, which helps to reduce the risk of adjacent connecting parts 400 getting stuck to each other.

[0134] In the embodiment of the present application, the spacer layer 430 covers the first transition fillet 410 , and at least covers 50% of the total surface area of ​​the first transition fillet 410 .

[0135] Here, the so-called surface area of ​​the transition fillet refers to the total surface area of ​​the first transition fillet region in the entire raised structure. When the first transition fillet region is a closed ring, it refers to the surface area on the entire circumference; when the first transition fillet region is linear, it refers to the surface area of ​​the entire length. When the transition fillet region includes more than two discontinuous parts, it refers to the sum of the surface areas of all these parts over their entire lengths.

[0136] Thus, adjacent connecting parts can be spaced apart within a sufficiently large range, so that adjacent connecting parts can be stably stacked with the spacers between them. The spacer layer 430 can be attached along the extension direction of the side wall 500, or along the extension direction of the arc of the first transition fillet 410. The side wall 500 can be annular, or extend along the Y-axis direction, that is, the spacer layer 430 can be attached along the circumference of the annular side wall 500, or along the Y-axis direction. The coverage area of ​​the spacer layer 430 is related to the surface roughness of the entire contact surface of the adjacent connecting parts 400. The minimum coverage area of ​​50% can ensure the attachment strength and adhesion effect of the spacer layer 430, thereby making the contact surface smoother and reducing the risk of adjacent connecting parts 400 getting stuck to each other.

[0137] In the embodiment of the present application, when viewed along the thickness direction, the side wall 500 is in a closed ring shape.

[0138] like Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, in some embodiments, the protruding structure 105 is formed into a truncated cone shape. When such connecting parts 400 are stacked, the abutment of adjacent connecting parts 400 is achieved by the side wall 500 provided on the body 403, and the side wall 500 can be surrounded in a ring shape, that is, the connecting part 400 has a truncated cone (convex hull) shaped protruding structure 405, so that the connecting part 400 is less likely to deform when stacked. The corresponding contact surface is also a closed annular surface, and the annular side wall 500 is easier to attach the spacer layer 430, which not only has the effect of locally thickening the contact position of the side wall 500, but also can effectively reduce the friction of the contact surface between adjacent connecting parts 400 through the spacer layer 430, further reducing the risk of adjacent connecting parts 400 getting stuck and difficult to separate.

[0139] In some specific embodiments, the spacer layer 430 covers the first transition fillet 410 in the entire circumference of the sidewall 500 .

[0140] The protruding structure 405 is Figure 4 In the convex shape shown, the side wall 500 is the side of the truncated cone (convex hull), and the whole circumference refers to the whole in the circumferential direction. Since the spacer layer 430 is continuously distributed in the whole circumferential direction, there is a spacer layer 430 between adjacent connecting parts 400 on the whole circumference, which can effectively reduce the friction of the contact surface between adjacent connecting parts 400, and further reduce the risk of adjacent connecting parts 400 getting stuck and difficult to separate.

[0141] In some specific embodiments, the spacer layer 430 is provided with multiple sections, and the multiple sections of the spacer layer 430 are distributed at intervals along the entire circumference of the side wall 500 .

[0142] The protruding structure 405 is Figure 4 As shown in the convex shape, the spacer layers 430 can be intermittently distributed in the entire circumferential direction of the side wall 500. Optionally, these spacer layers 430 can be arranged at certain angles, and the angles of the intervals can be the same or different. The angle of the interval refers to the angle corresponding to the area between the ends of two adjacent spacer layers that are close to each other along the circumferential direction. In addition, in some embodiments, the circumferential lengths of the multiple spacer layers 430 arranged at intervals are the same, of course, they can also be different. In some embodiments, the width of these spacer layers 430 is the same throughout the entire length, that is, the spacer layers 430 are of equal width throughout the entire length.

[0143] Under the premise of satisfying the minimum attachment area of ​​50%, the spacing distribution of the spacing layer 430 can also achieve the appropriate technical effect of reducing friction, reduce the risk of adjacent connecting parts 400 getting stuck and unable to be separated by gravity, and at the same time save the material of the spacing layer 430.

[0144] In the embodiment of the present application, the side wall 500 is linear when viewed along the thickness direction.

[0145] like Fig. 9 As shown, when the connecting parts 400 are stacked, the abutment of adjacent connecting parts 400 is achieved by the side walls 500 set on the main body 403, and the side walls 500 can extend in a straight direction. This design can effectively control the gap between adjacent connecting parts 400 and reduce the risk of the connecting parts 400 getting stuck.

[0146] In the embodiment of the present application, according to the application scenario of the connecting component 400, there is a case where two side walls 500 are provided. In this case, Fig. 9 As shown, the side wall 500 includes a first side wall 501 and a second side wall 502 located on opposite sides of the end wall 404 along the first direction (X-axis direction), and the first side wall 501 can be the same as the second side wall 502, or the first side wall 501 can be different from the second side wall 502. The first side wall 501 and the second side wall 502 extend along the second direction (Y-axis direction) respectively, and the first direction (X-axis direction) and the second direction (Y-axis direction) are perpendicular to each other and are both perpendicular to the thickness direction (Z-axis direction).

[0147] When observed along the thickness direction (Z-axis direction), the side wall 500 of the connecting component 400 extends in a straight line direction; the protruding structure 405 includes a first side wall 501, a second side wall 502 and an end wall 404 connected to the side wall 500. When observed along the second direction (Y-axis direction), the shape of the connecting component 400 can be roughly trapezoidal. This trapezoidal protruding structure 405 is easy to process, has stable connection, can effectively control the shape of the contact surface, and reduces the risk of material jamming. By respectively providing a spacer layer 430 for the two side walls 500, it is helpful to reduce the risk of adjacent connecting components 400 being stuck and difficult to separate.

[0148] In the embodiment of the present application, the spacer layer 430 covers the first transition fillet 410 along the entire length of the sidewall 500 .

[0149] In the technical solution of the embodiment of the present application, for the overall trapezoidal connection component 400 having two side walls 500, the contact surface extends along the second direction (Y-axis direction), and the full length of the side wall 500 refers to the length of the side wall 500 in the second direction (Y-axis direction), so the spacer layer 430 can be continuously attached to the first transition fillet 410 along the second direction (Y-axis direction), and the attachment area of ​​the spacer layer 430 in the contact surface can be increased as much as possible. Since the spacer layer 430 covers the full length of the two side walls 500, the stability of the connection components 400 when stacked can be increased, and the risk of adjacent connection components 400 being stuck and unable to be separated by gravity can be reduced.

[0150] In the embodiment of the present application, the spacer layer 430 is provided with multiple sections, and the multiple sections of the spacer layer 430 are distributed at intervals along the side wall 500 .

[0151] Alternatively, if Fig. 9 As shown, the protruding structure 405 has a first side wall 501 and a second side wall 502, and the attached spacer layer 430 is distributed at intervals on the first side wall 501 and the second side wall 502, and the spacer layer 430 on the first side wall 501 and the spacer layer 430 on the second side wall 502 are symmetrically arranged about the Y-axis direction, effectively reducing the possibility of jamming of the connecting parts.

[0152] In some embodiments, for the connecting component 400 with a linear sidewall 500 when viewed along the thickness direction (Z-axis direction), the attached spacer layers 430 may be spaced apart along the second direction (Y-axis direction), that is, the first transition fillets 410 are attached at intervals.

[0153] Optionally, the spacer layers may be distributed discontinuously on the side wall 500, that is, multiple spacer layers may be provided on the side wall 500 along its length. These spacer layers may be provided at equal intervals or at unequal intervals. These spacer layers may be provided at equal lengths or at unequal lengths. Usually, these spacer layers are provided at equal widths. Here, the width is Figure 5 It can be understood as the extension of the spacer layer from the body 403 to the side wall 500. Under the premise of meeting the 50% minimum attachment area, it can also achieve a suitable technical effect of reducing friction, reduce the risk of adjacent connecting parts 400 being stuck and unable to be separated by gravity, and save the material of the spacer layer 430.

[0154] In an embodiment of the present application, the spacer layer 430 is releasably attached to the second transition region 420 .

[0155] In the technical solution of the embodiment of the present application, a spacer layer 430 is attached to the second transition region 420. Since the spacer layer 430 may melt during subsequent processing and welding, which may have an adverse effect on the battery cell 101, the connection between the spacer layer 430 and the second transition region 420 may be peelable, and removing the spacer layer 430 will not cause the structure of the second transition region 420 to change, and will not affect subsequent processing and assembly.

[0156] In some embodiments, the spacer layer 430 is attached to the first transition region and / or the second transition region 420 by coating, bonding, injection molding, or clamping.

[0157] In some embodiments, the spacer layer 430 is a polyethylene terephthalate layer, a polypropylene layer, or a polytetrafluoroethylene layer.

[0158] The spacer layer 430 needs to maintain good attachment strength with the first transition region and / or the second transition region 420. The fixing methods of coating, bonding, injection molding or clamping can meet the needs. The spacer layer 430 can also be peeled off during subsequent processing. Those skilled in the art should understand that the spacer layer 430 can also be attached to the first transition region and / or the second transition region 420 by other easy methods, which will not be listed in the embodiments of the present application.

[0159] Polyethylene terephthalate layer (ie PET), polypropylene layer (ie PP) or perfluoroalkoxy resin (ie PFA) has a wide range of sources, a low friction coefficient, and is an insulating material, and is suitable for use as the spacer layer 430 .

[0160] In the embodiment of the present application, the thickness of the spacer layer 430 is 0.01 mm to 0.5 mm.

[0161] Illustratively, the thickness of the spacer layer 430 may be 0.01 mm, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm, etc.

[0162] In addition, the thickness of the connecting member 400 can be specifically set according to the application scenario. In some specific embodiments, the thickness can be in the range of 0.1 mm to 3.0 mm.

[0163] Since the spacer layer 430 with appropriate thickness is attached, it helps to reduce the risk of adjacent connecting components 400 getting stuck and difficult to separate, and also reduces the possibility of excessive gaps or poor connections between the connecting components 400 and the electrode assembly 102 due to the presence of the spacer layer 430.

[0164] In addition, since the spacer layer 430 can increase the local thickness of the contact position of the side wall 500, a spacer layer 430 that is too thin will not be effective in reducing the risk of the connecting component 400 getting stuck, and it is easy to be damaged during the loading and stacking process. Therefore, the thickness of the spacer layer 430 is not less than 0.01mm. In addition, if the spacer layer 430 is too thick, it will increase the overall weight of the connecting component 400, thereby affecting the weight of the battery cell 101. The spacer layer 430 with a thickness greater than 0.5mm is not suitable for battery processing. The spacer layer 430 with a thickness of 0.01mm to 0.5mm can reduce the risk of the connecting components 400 getting stuck and difficult to separate during loading, improve the stability of the connecting component 400 during loading, and also improve the assembly production efficiency of the battery cell 101.

[0165] In the embodiment of the present application, the angle between the side wall 500 and the body 403 is greater than 90° and less than 180°.

[0166] The protruding structure 405 may be in a convex shape, and the angle between the sidewall 500 in the protruding structure 405 and the body 403 is greater than 90° and less than 180°. For example, the angle between the sidewall 500 and the body 403 may be 91°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, or 179°, etc.

[0167] In the embodiments of the present application, Figure 7 , Figure 8 , Fig.10 As shown, when one connecting component 400 is stacked with another connecting component 400 along the thickness direction (Z-axis direction), one connecting component 400 is in contact with another connecting component 400 via the spacer layer 430 .

[0168] The connecting components 400 are stacked in the thickness direction (Z-axis direction) during loading, and when stacked, adjacent connecting components 400 are in contact via the spacer layer 430. Compared with contact surfaces not in contact via the spacer layer 430, contact via the spacer layer 430 can effectively reduce the friction between the two connecting components 400, thereby reducing the risk of the connecting components 400 getting stuck during loading.

[0169] A second aspect of the present application provides a battery 100, such as Figure 2 As shown, the battery 19 includes a battery case 100A and at least one battery cell 101 according to the first aspect of the embodiment of the present application housed in the battery case 100A.

[0170] Since the battery includes a battery cell 101 and the battery cell 101 is not prone to the problem of the connection component 400 getting stuck during the manufacturing process, the assembly speed of the entire battery can be increased, thereby improving the production efficiency of the battery.

[0171] A third aspect of the present application provides an electrical device, the electrical device comprising a battery cell 101 as described in the first aspect of the present application or a battery 100 as described in the second aspect of the present application for providing electrical energy. Figure 1 As shown, the electric device may be a vehicle 1000 , and a battery 100 is disposed inside the vehicle 1000 . The battery 100 may serve as an operating power source and / or a driving power source for the vehicle 1000 .

[0172] Since the electric device includes the battery cell 101 or the battery 100 with high assembly efficiency, the production efficiency of the electric device can be effectively improved.

[0173] A fourth aspect of the embodiments of the present application provides an energy storage device 2000, such as Fig.11 As shown, the battery includes the second aspect of the embodiment of the present application, and the battery can store electrical energy and provide electrical energy.

[0174] Since the energy storage device 2000 includes the battery 100 with high assembly efficiency, the production efficiency of the energy storage device can be effectively improved.

[0175] Specific examples of some embodiments of the present application are described below with reference to the accompanying drawings.

[0176] like Figure 4 , Fig. 9 The adapter pieces shown are generally trapezoidal and convex, and for automatic loading, multiple adapter pieces (i.e., connecting components 400) are usually stacked together; during the stacking process of multiple adapter pieces (i.e., connecting components 400), if they are trapezoidal, two parallel contact lines will be formed, and if they are convex, a closed circular contact line will be formed, and under the influence of gravity and / or extrusion, two of them may be stuck;

[0177] Based on this, adhesive tape or injection-molded plastic is bonded on the inner side of the adapter (i.e., the connecting component 400) to form a spacing layer 430 to create a lubricating effect, which can effectively prevent the adapters from getting stuck when they are automatically loaded and prevent the generation of metal wires.

[0178] The thickness of the spacer layer 430 is about 0.01 to 0.5 mm. A suitable thickness can achieve an anti-stuck effect without being easily damaged or excessively increasing the weight.

[0179] The spacer layer 430 is located in the R angle transition area, and the chamfer radius of the R angle is 0.3 mm to 2.5 mm;

[0180] The material of the spacer layer 430 is an insulating plastic material such as PET / PP / PFA;

[0181] The spacer layer 430 is either bonded to the adapter sheet, or injection molded to the surface of the adapter sheet, or snapped to the surface;

[0182] For Figure 4 For the adapter (ie, the connecting component 400 ) with the convex structure 405 in the shape of a convex hull, the spacing layer 430 should cover a whole arc, or at least 50% of the length of the arc.

[0183] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: A housing having electrode terminals formed thereon; an electrode assembly, contained in the housing; A connecting component, used to connect the electrode assembly and the electrode terminal; The connecting component has a first surface and a second surface located at opposite sides along a thickness direction thereof, and the connecting component includes: ontology; a protrusion structure disposed on the body, the protrusion structure comprising a protrusion formed on the first surface side and a concave portion formed on the second surface side, the protrusion structure comprising an end wall and a side wall, the side wall being connected between the end wall and the body, wherein a connecting corner position of the side wall on the second surface and the body constitutes a first transition region, and a connecting corner position of the side wall on the first surface and the end wall constitutes a second transition region; and A spacer layer is attached to at least one of the first transition region and the second transition region.

2. The battery cell according to claim 1, characterized in that: The surface roughness of the spacer layer is smaller than the surface roughness of the body.

3. The battery cell according to claim 1, characterized in that: A first transition fillet is provided at a connecting corner between the side wall and the body on the second surface, the first transition region includes the first transition fillet, and the spacer layer is at least attached to the first transition fillet.

4. The battery cell according to claim 3, characterized in that: The spacer layer covers the first transition fillet and at least covers 50% of the total surface area of ​​the first transition fillet.

5. The battery cell according to claim 4, characterized in that: When viewed along the thickness direction, the side wall is in a closed ring shape.

6. The battery cell according to claim 5, characterized in that: The spacer layer covers the first transition fillet in the entire circumference of the side wall.

7. The battery cell according to claim 5, characterized in that: The spacer layer is provided with a plurality of sections, and the plurality of sections of the spacer layer are distributed at intervals along the entire circumference of the side wall.

8. The battery cell according to claim 4, characterized in that: When viewed along the thickness direction, the side wall is linear.

9. The battery cell according to claim 8, characterized in that: The side wall includes a first side wall and a second side wall located on opposite sides of the end wall along a first direction, the first side wall and the second side wall extend along a second direction respectively, and the first direction is perpendicular to the second direction and is perpendicular to the thickness direction.

10. The battery cell according to claim 8 or 9, characterized in that: The spacer layer covers the first transition fillet along the entire length of the sidewall.

11. The battery cell according to claim 8 or 9, characterized in that: The spacer layer is provided with a plurality of sections, and the plurality of sections of the spacer layer are distributed along the side wall at intervals.

12. The battery cell according to claim 1, characterized in that: The spacer layer is releasably attached to the second transition region.

13. The battery cell according to any one of claims 1 to 9, characterized in that: The spacer layer is attached to the first transition region and / or the second transition region by coating, bonding, injection molding or clamping; the spacer layer is a polyethylene terephthalate layer, a polypropylene layer or a perfluoroalkoxy resin.

14. The battery cell according to any one of claims 1 to 9, characterized in that: The thickness of the spacer layer is 0.01 mm to 0.5 mm.

15. The battery cell according to any one of claims 5 to 7, characterized in that: The angle between the side wall and the body is greater than 90° and less than 180°.

16. The battery cell according to any one of claims 1 to 9, characterized in that: When one of the connecting components is stacked on the other connecting component in the thickness direction, the one of the connecting components is in contact with the other connecting component via the spacer layer.

17. The battery cell according to any one of claims 1 to 9, characterized in that: The body is connected to the electrode assembly, and the protruding structure is connected to the electrode terminal.

18. The battery cell according to any one of claims 1 to 9, characterized in that: The housing comprises: a housing formed with an opening; and An end cap is connected to the shell and closes the opening, the end cap is formed with an electrode lead-out hole, and the electrode terminal is formed on the end cap; the protruding structure is at least partially connected to the electrode terminal formed on the end cap through the electrode lead-out hole along the thickness direction.

19. A battery, characterized in that: include: A battery case and at least one battery cell according to claim 18, wherein the battery case accommodates the battery cell.

20. An electrical device, characterized in that: The electrical device comprises a battery cell according to any one of claims 1 to 18 or a battery according to claim 19 for providing electrical energy.

21. An energy storage device, characterized in that: The battery according to claim 19 is capable of storing electric energy and providing electric energy.

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