Battery monomer, battery and electric device

Abstract

The utility model provides a battery monomer, a battery and a power utilization device, and the battery monomer comprises a cylindrical shell which is internally provided with an accommodating cavity; the electrode assembly is mounted in the accommodating cavity; the electrode terminal comprises a pole, a connecting piece and an insulating piece; the pole column comprises a conducting strip and a conducting column, one side of the conducting strip is connected with the electrode assembly, and the other side of the conducting strip is attached to the conducting column; the connecting piece surrounds the outer side of the pole and is connected with the shell; and the insulating part is filled between the connecting part and the pole, and the insulating part, the connecting part and the pole are molded into a whole. The electrode terminals of the battery monomer are integrally formed, so that the production is convenient. When the electrode terminal is assembled with the shell, the assembly workload can be reduced, the assembly efficiency is improved, and the production cost is reduced. In addition, the pole comprises the conducting strip and the conducting column, and the conducting strip and the conducting column can be made of different materials, so that the cost of the single battery can be further reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery, and an electrical device. Background Art

[0002] With the development of new energy technologies, batteries are used more and more widely, such as in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric airplanes and power tools.

[0003] Cylindrical batteries are a common type of battery, widely used due to their mature winding process, high degree of automation, and high production efficiency. As their use increases, the production cost of cylindrical batteries is gradually becoming a concern. Utility Model Content

[0004] In view of the above problems, the present application provides a battery cell, a battery and an electrical device, wherein the battery cell is conducive to reducing costs.

[0005] On the first aspect, some embodiments of the present application provide a battery cell, which includes an outer shell, which is cylindrical and has a accommodating cavity inside; an electrode assembly, which is installed in the accommodating cavity; an electrode terminal, which includes a pole, a connector and an insulating member; the pole includes a conductive sheet and a conductive column, one side of the conductive sheet is connected to the electrode assembly and the other side is fitted with the conductive column; the connector surrounds the outside of the pole and is connected to the outer shell; the insulating member is filled between the connector and the pole, and is formed as one piece with the connector and the pole.

[0006] In the technical solution of the above embodiment, the electrode terminal includes a pole, a connector, and an insulating member. The insulating member is filled between the connector and the pole and is integrally formed with the connector and the pole, thereby facilitating production. Furthermore, when assembling the electrode terminal with the housing, the assembly workload can be reduced, improving assembly efficiency and thereby reducing the production cost of the battery cell. Furthermore, the pole includes a conductive sheet and a conductive post. The conductive sheet and the conductive post can be made of different materials, further reducing the cost of the battery cell according to usage requirements.

[0007] According to the battery cells provided in some embodiments of the present application, the corrosion resistance of the conductive pillars is no less than that of the conductive sheets. This makes the conductive pillars less susceptible to damage, thereby increasing the service life of the battery cells and reducing the cost of use.

[0008] In some embodiments of the present application, the battery cells provided herein have an annular conductive column with a flange at one end. The flange is fitted over the conductive sheet, and the outer contour of the flange coincides with the outer contour of the conductive sheet. This improves connection strength and increases the flow area.

[0009] According to some embodiments of the present application, the battery cell is provided with a coupling groove on the pole, which passes through the flange and the conductive sheet, and a coupling protrusion is provided on the insulating member, which is located in the coupling groove. In this way, the conductive pole and the conductive sheet can be simultaneously limited.

[0010] According to some embodiments of the present application, the battery cell has a boss at the other end of the conductive post, and the boss protrudes from the end surface of the insulating member at one end of the electrode terminal, thereby facilitating connection of the conductive post to an external device.

[0011] According to some embodiments of the present application, the battery cells provided herein are made of copper or aluminum, and the conductive sheets are made of aluminum, thereby reducing material costs.

[0012] According to some embodiments of the present application, the battery cell connector includes a first connecting portion, which is cylindrical and surrounds the outer edge of the terminal. The first connecting portion is provided with a coupling hole that penetrates the side wall of the first connecting portion. The insulating member covers the outer surface of the first connecting portion and fills the coupling hole. The second connecting portion is integrally formed with the first connecting portion and welded to the outer shell. The second connecting portion is annular, and the inner edge of the second connecting portion is connected to the first connecting portion. This can improve the molding quality and connection strength of the electrode terminal.

[0013] According to some embodiments of the present application, a battery cell is provided with a blocking portion at one end of the insulating member. The blocking portion is annular and located between the conductive sheet and the housing, thereby providing axial positioning for the conductive sheet.

[0014] In some embodiments of the present application, the battery cell features an insulating member that tapers from one end of the housing to the other, with the outer contour gradually shrinking. The insulating member is made of a polymer material, while the connector is made of metal. The connector, terminal, and insulating member are integrally injection-molded. This facilitates the manufacture of the electrode terminals.

[0015] According to some embodiments of the present application, the battery cell housing includes a shell and a cover plate. The cover plate is connected to one end of the shell and encloses a receiving cavity with the shell. The cover plate is provided with an insulating pad, which is located within the receiving cavity and covers the surface of the cover plate, forming an integral part with the cover plate. This can fully utilize the space along the axis of the battery cell and improve energy density.

[0016] According to some embodiments of the present application, the outer diameter of the battery cell is greater than 46 mm, the cover plate and the shell are welded together on the circumference, or the cover plate and the shell are welded together on the end faces. This can enrich the design of the battery cell.

[0017] According to some embodiments of the present application, the battery cell is provided with a first explosion-proof valve installed on the cover plate, the first explosion-proof valve being in an oblong shape; and / or a second explosion-proof valve installed on the cover plate, the second explosion-proof valve being in a circular shape. In this way, the configuration of the explosion-proof valve can be enriched.

[0018] According to some embodiments of the present application, the battery cell has two electrode terminals, both of which are mounted on the cover plate. The electrode assembly includes an electrode body, a positive electrode tab, and a negative electrode tab. The positive and negative electrode tabs are located at the same end of the electrode body, with the positive tab connected to one electrode terminal and the negative tab connected to the other. This can reduce the space occupied by the electrode assembly and improve safety.

[0019] According to some embodiments of the present application, the battery cell further includes two symmetrically arranged current collectors. The current collectors include a current collecting portion and a transition portion. The current collecting portion is fan-shaped, with its center coinciding with the axis of the electrode body. The transition portion is cylindrical and connects to the current collecting portion at the center of the fan-shaped portion. The current collecting portion of one current collector is connected to the positive electrode tab, and the transition portion is connected to one electrode terminal. The current collecting portion of the other current collector is connected to the negative electrode tab, and the transition portion is connected to the other electrode terminal. This reduces the processing cost of the current collectors and occupies less space.

[0020] According to some embodiments of the present application, the battery cell further includes a current collector, which includes a current collector sheet and an insulating frame. The current collector sheets are symmetrically mounted at both ends of the insulating frame and are integrally formed with the insulating frame. The current collector sheet includes a current collecting section, a transition section, and a transfer section. One end of the transition section is connected to one end of the current collecting section, and the other end of the transition section is connected to one end of the transfer section. The current collecting section and the transfer section are arranged parallel to each other, and the transfer section is located between the current collecting section and the insulating pad. The current collecting section of one current collector sheet is connected to the positive electrode tab, and the transfer section is connected to one electrode terminal. The current collecting section of the other current collector sheet is connected to the negative electrode tab, and the transfer section is connected to the other electrode terminal. In this way, the current collector and the electrode terminal, and the current collector and the electrode assembly can be welded simultaneously, improving welding efficiency.

[0021] According to some embodiments of the present application, the battery cell provided in the insulating frame includes a first insulating plate and a second insulating plate. The first insulating plate is connected to a current collecting section at each end, and the second insulating plate is connected to a transition section at each end. The first insulating plate is provided with a through-groove. The transition section is provided with a transition protrusion, which is welded to the electrode terminal. This improves the reliability of the current collector and facilitates the welding connection between the current collector and the electrode terminal.

[0022] In a second aspect, some embodiments of the present application provide a battery comprising the battery cell provided by the above technical solution.

[0023] In a third aspect, some embodiments of the present application provide an electrical device, which includes a battery provided by the above technical solution, and the battery is used to supply power.

[0024] The technical solutions provided by the embodiments of the present disclosure bring at least the following beneficial effects:

[0025] Some embodiments of the present application provide a battery cell, a battery, and an electrical device. The battery cell includes a housing, an electrode assembly, and an electrode terminal. The electrode terminal includes a pole, a connector, and an insulating member. The insulating member is filled between the connector and the pole, and is formed into one piece with the connector and the pole. The electrode terminal is then integrally formed, which facilitates production. Moreover, when the electrode terminal is assembled with the housing, the assembly workload can be reduced, the assembly efficiency can be improved, and thus the production cost of the battery cell can be reduced. In addition, the pole includes a conductive sheet and a conductive column. The material of the conductive sheet and the material of the conductive column can be different, which can further reduce the cost of the battery cell according to the use requirements.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. Throughout the accompanying drawings, the same reference numerals are used to denote the same components.

[0028] Figure 1 A simplified schematic diagram of a vehicle provided in some embodiments of the present application;

[0029] Figure 2 A schematic diagram of disassembling a battery provided in some embodiments of the present application;

[0030] Figure 3 A schematic structural diagram of a battery cell provided in some embodiments of the present application;

[0031] Figure 4 A schematic diagram of the disassembly of the electrode terminals provided in some embodiments of the present application;

[0032] Figure 5 A schematic diagram of the structure of the connector provided in some embodiments of the present application;

[0033] Figure 6 A schematic diagram of the structure of a pole member provided in some embodiments of the present application;

[0034] Figure 7 A schematic structural diagram of an insulating member provided in some embodiments of the present application;

[0035] Figure 8 A cross-sectional view of an electrode terminal provided in some embodiments of the present application;

[0036] Figure 9 A schematic diagram of disassembling a cover plate provided in some embodiments of the present application;

[0037] Figure 10 A schematic diagram of disassembling a battery cell provided in some embodiments of the present application;

[0038] Figure 11 Schematic diagram of the structure of the current collecting member provided in other embodiments of the present application;

[0039] Figure 12 This is a top view of a battery cell provided in some other embodiments of the present application.

[0040] In the attached figure:

[0041] 1000-Vehicle; 100-Battery; 200-Controller; 300-Motor;

[0042] 10-battery module; 11-box; 111-first box; 112-second box; 1-battery cell;

[0043] 2 - electrode terminal; 21 - insulating member; 211 - coupling protrusion; 212 - blocking portion; 22 - connecting member; 221 - first connecting portion; 2211 - coupling hole; 222 - second connecting portion; 23 - pole member; 231 - conductive column; 2311 - boss; 2312 - flange; 232 - conductive sheet; 2321 - coupling groove;

[0044] 3-housing; 31-cover plate; 311-first explosion-proof valve; 3111-first patch; 3112-first valve hole; 3113-first valve plate; 312-liquid injection hole; 313-insulating pad; 314-second explosion-proof valve; 32-housing;

[0045] 4-electrode assembly; 41-positive electrode tab; 42-negative electrode tab; 43-electrode body; 44-insulating film;

[0046] 5-current collecting part; 51-transition part; 52-current collecting part; 53-current collecting piece; 531-current collecting section; 532-transition section; 533-transition section; 5331-transition protrusion; 54-insulating frame; 541-second insulating plate; 542-first insulating plate. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0048] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0049] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0050] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0051] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0052] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0053] Currently, judging by market developments, batteries are becoming increasingly widely used. Batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. Cylindrical batteries are a common type of battery. They have a mature winding process, a high degree of automation, and high production efficiency, making them widely used. As their application increases, reducing the cost of cylindrical batteries has become a concern in this field.

[0054] The inventors have noted that during the production of cylindrical batteries, the assembly process is labor-intensive. The electrode terminal 2 comprises multiple components, and the assembly of the electrode terminal 2 and the assembly of the electrode terminal 2 with the cover plate 31 are complex and labor-intensive, resulting in high production costs. Furthermore, the material cost of cylindrical batteries is also high. By rationally utilizing materials, the production cost of cylindrical batteries can be reduced.

[0055] To reduce production costs, the inventors discovered that design techniques can reduce assembly workload and lower material costs. Specifically, two or more components of the electrode terminal 2 are integrated into one piece, reducing the number of parts required for assembly. Furthermore, components with high material costs can be separated into separate pieces, reducing costs through material selection.

[0056] Based on the above considerations, and in order to reduce production costs, the inventors, after in-depth research, have designed a battery cell 1. By integrally forming the pole, connector 22, and insulating member 21 of the electrode terminal 2, the electrode terminal 2 can be assembled during production. During assembly of the battery cell 1, only the outer shell 3 and the electrode terminal 2 need to be assembled together. This reduces assembly workload, improves production efficiency, and ultimately reduces production costs. At the same time, the material cost of the pole is relatively high. By designing the pole as a split structure, including a conductive sheet 232 and a conductive column 231, the materials of the conductive sheet 232 and the conductive column 231 can be selected based on actual operating conditions, thereby reducing material costs.

[0057] The battery cell 1 disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles 1000, ships, or aircraft. A power supply system comprising the battery cell 1 and battery 100 disclosed in the present application can be used to form the electrical device, thereby helping to reduce costs.

[0058] The present invention provides an electric device using a battery 100 as a power source. 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-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0059] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0060] Please refer to Figure 1 , Figure 1 A simplified schematic diagram of a vehicle 1000 provided in some embodiments of the present application.

[0061] The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000.

[0062] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also 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.

[0063] Please refer to Figure 2 , Figure 2 Schematic diagram of the disassembly of the battery 100 provided in some embodiments of the present application.

[0064] The battery 100 includes a housing 11 and a battery cell 1, which is housed in the housing 11. The housing 11 is used to provide a storage space for the battery cell 1, and the housing 11 can adopt a variety of structures. In some embodiments, the housing 11 can include a first housing 111 and a second housing 112, the first housing 111 and the second housing 112 covering each other, and the first housing 111 and the second housing 112 jointly define a storage space for accommodating the battery cell 1. The second housing 112 can be a hollow structure with one end open, and the first housing 111 can be a plate-shaped structure, and the first housing 111 covers the open side of the second housing 112, so that the first housing 111 and the second housing 112 jointly define a storage space; the first housing 111 and the second housing 112 can also be hollow structures with one side open, and the open side of the first housing 111 covers the open side of the second housing 112. Of course, the box body 11 formed by the first box body 111 and the second box body 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0065] In the battery 100, there may be multiple battery cells 1, which may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 1. Multiple battery cells 1 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery module 1 may be housed within the housing 11. Alternatively, the battery 100 may comprise multiple battery cells 1 connected in series, in parallel, or in a hybrid connection to form a battery module 10, which is then connected in series, in parallel, or in a hybrid connection to form a single unit housed within the housing 11. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 1.

[0066] Each battery cell 1 may be a secondary battery 100 or a primary battery 100 ; it may also be a lithium-sulfur battery 100 , a sodium-ion battery 100 or a magnesium-ion battery 100 , but is not limited thereto.

[0067] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 1 provided in some embodiments of the present application. A battery cell 1 is the smallest unit that constitutes a battery 100. Figure 3 As shown, the battery cell 1 includes a cover plate 31 , a shell 32 , an electrode terminal 2 , an electrode assembly 4 and other functional components.

[0068] The cover plate 31 is a component that covers the opening of the housing 32 to isolate the internal environment of the battery cell 1 from the external environment. Optionally, the cover plate 31 can be made of a material with a certain hardness and strength (such as an aluminum alloy). In this way, the cover plate 31 is less likely to deform when squeezed or collided, giving the battery cell 1 a higher structural strength and improved safety performance. The electrode terminal 2 is mounted on the cover plate 31. The electrode terminal 2 can be used to electrically connect to the electrode assembly 4 to output or input electrical energy to the battery cell 1.

[0069] The housing 32 is a component that cooperates with the cover plate 31 to form an internal environment for the battery cell 1. This internal environment can be used to accommodate the electrode assembly 4, electrolyte, and other components. The housing 32 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this.

[0070] The electrode assembly 4 is the component in the battery cell 1 where the electrochemical reaction occurs. The battery cell assembly 4 is primarily formed by winding or stacking positive and negative electrode sheets, and a separator is typically provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 4, while the portions of the positive and negative electrode sheets without active material constitute the positive electrode tab 41 and the negative electrode tab 42, respectively. During the charge and discharge process of the battery 100, the positive and negative electrode active materials react with the electrolyte, and the positive and negative electrode tabs 41 and 42 connect to the electrode terminals 2 to form a current circuit.

[0071] Please refer to Figures 4 to 8 , Figure 4 A schematic diagram of the disassembly of the electrode terminals provided in some embodiments of the present application; Figure 5 A schematic diagram of the structure of the connector provided in some embodiments of the present application; Figure 6 A schematic diagram of the structure of a pole member provided in some embodiments of the present application; Figure 7 A schematic structural diagram of an insulating member provided in some embodiments of the present application; Figure 8 A cross-sectional view of an electrode terminal provided in some embodiments of the present application.

[0072] On the first aspect, some embodiments of the present application provide a battery cell 1, which includes an outer shell 3, which is cylindrical and has a accommodating cavity inside; an electrode assembly 4, which is installed in the accommodating cavity; an electrode terminal 2, which includes a pole, a connector 22 and an insulating member 21; the pole includes a conductive sheet 232 and a conductive column 231, one side of the conductive sheet 232 is connected to the electrode assembly 4, and the other side is in contact with the conductive column 231; the connector 22 surrounds the outside of the pole and is connected to the outer shell 3; the insulating member 21 is filled between the connector 22 and the pole, and is formed as one body with the connector 22 and the pole.

[0073] The battery cell 1 is a cylindrical battery cell 1, with a cylindrical outer shell 3 and electrode terminals 2 mounted on the outer shell 3. The electrode assembly 4 is a wound structure, mounted within the housing and connected to the electrode terminal 2. The electrode terminal 2 is integrally formed, with the pole and connector 22 both made of metal, and the insulating member 21 made of a non-metallic material. The insulating member 21 can be thermoplastically formed. During the molding of the electrode terminal 2, a gap is placed between the pole and connector 22 to prevent electrical connection and provide space for the insulating member 21, which fills the gap. After molding, the insulating member 21 is integrated with the pole and connector 22. After molding, the electrode terminal 2 is mounted on the outer shell 3, with the connector 22 connected to the outer shell 3, insulated from the pole. The mounting method of the electrode terminal 2 is not limited to welding or riveting. The number of electrode terminals 2 is not limited to one. When there is only one electrode terminal 2, the battery cell 1 can be electrically connected to the outside world through the outer shell 3 and the electrode terminal 2. When there are two electrode terminals 2, the battery cell 1 can be electrically connected to the outside world through both electrode terminals 2.

[0074] When the electrode terminal 2 is directly or indirectly connected to the electrode assembly 4, the conductive sheet 232 is connected between the electrode assembly 4 and the conductive post 231, serving as the medium for the electrical connection between the conductive post 231 and the electrode assembly 4. The conductive post 231 serves as the medium for the electrical connection between the battery cell 1 and the outside world. The electrode post includes the conductive sheet 232 and the conductive post 231, both of which are made of metal and are independent of each other, and can be selected independently.

[0075] In the technical solution of the above embodiment, the battery cell 1 includes a housing 3, an electrode assembly 4, and an electrode terminal 2. The electrode terminal 2 includes a pole, a connector 22, and an insulating member 21. The insulating member 21 is filled between the connector 22 and the pole, and is formed into a single piece with the connector 22 and the pole, thereby facilitating production. Furthermore, when the electrode terminal 2 is assembled with the housing 3, the assembly workload can be reduced, assembly efficiency can be improved, and thus the production cost of the battery cell 1 can be reduced. Furthermore, the pole includes a conductive sheet 232 and a conductive column 231. The material of the conductive sheet 232 and the material of the conductive column 231 can be different, thereby further reducing the cost of the battery cell 1 according to actual use requirements.

[0076] In some embodiments of the present application, Figure 4 As shown, the corrosion resistance of the conductive pillar 231 is not less than that of the conductive sheet 232 .

[0077] Corrosion resistance is the ability of a metal material to resist the corrosive effects of surrounding media. The stronger the corrosion resistance, the less susceptible the metal material is to damage. The corrosion resistance of the conductive pillar 231 can be equal to that of the conductive sheet 232, or it can be greater than that of the conductive sheet 232.

[0078] In the technical solution of the above embodiment, the conductive column 231 serves as a medium for electrically connecting the battery cell 1 with the outside world. There are uncertainties in the working conditions. The corrosion resistance of the conductive column 231 is not less than that of the conductive sheet 232. Therefore, the conductive column 231 is less likely to be damaged, which can increase the service life of the battery cell 1 and reduce the cost of use.

[0079] In some embodiments of the present application, the conductive sheet 232 is made of copper or aluminum, and the conductive pillar 231 is made of aluminum.

[0080] When the pole is used as the positive electrode, the conductive sheet 232 is made of aluminum, and the conductive column 231 is made of aluminum. When the pole is used as the negative electrode, the conductive sheet 232 is made of copper, and the conductive column 231 is made of aluminum.

[0081] In the technical solution of the above embodiment, the conductive post 231 is made of aluminum, which has excellent corrosion resistance. Furthermore, when the terminal is used as a negative electrode, the conductive sheet 232 is made of copper, and the conductive post 231 is made of aluminum. This can also reduce material costs compared to using copper for the entire terminal.

[0082] In some embodiments of the present application, Figure 6 and Figure 8 As shown, the conductive column 231 is annular, with a flange 2312 provided at one end. The flange 2312 fits the conductive sheet 232 , and the outer contour of the flange 2312 coincides with the outer contour of the conductive sheet 232 .

[0083] The conductive post 231 is annular and can be a circular ring or a square ring (a hollow rectangular parallelepiped). A flange 2312 is located at one end of the conductive post 231 along the axis of the conductive post 231, extending radially from the conductive post 231. The outer contour of the flange 2312 can be circular, rectangular, pentagonal, or hexagonal. The conductive sheet 232 is sheet-shaped and has a uniform thickness along the axis of the conductive post 231.

[0084] In the technical solution of the above embodiment, the conductive post 231 is annular, providing a welding position to facilitate welding connection of the electrode terminal 2 to an external device and a positioning reference to facilitate positioning of the electrode terminal 2 during molding. The conductive post 231 is provided with a flange 2312 that fits the conductive sheet 232, which can increase the connection area between the conductive post 231 and the conductive sheet 232, thereby improving the connection strength and increasing the flow area.

[0085] In some embodiments of the present application, Figure 6 As shown, a coupling groove 2321 is provided on the pole, and the coupling groove 2321 passes through the flange 2312 and the conductive sheet 232 . A coupling protrusion 211 is provided on the insulating member 21 , and the coupling protrusion 211 is located in the coupling groove 2321 .

[0086] For example, there can be one coupling groove 2321, which extends through the flange 2312 and the conductive sheet 232 along the axis of the pole. There can also be multiple coupling grooves 2321, which are distributed in a circular array. The number of coupling protrusions 211 matches the number of coupling grooves 2321, and the coupling protrusions 211 are located on the inner wall surface of the insulating member 21.

[0087] In the technical solution of the above embodiment, a coupling groove 2321 is provided on the pole, and a coupling protrusion 211 is provided on the insulating member 21. The coupling protrusion 211 is located within the coupling groove 2321, which can increase the connection surface between the pole and the insulating member 21, thereby improving the connection strength and providing a position limit for the pole. The coupling groove 2321 passes through the flange 2312 and the conductive plate 232, which can simultaneously limit the position of the conductive pole 231 and the conductive plate 232.

[0088] In some embodiments of the present application, Figure 6 As shown, a boss 2311 is provided at the other end of the conductive pillar 231 . The boss 2311 protrudes from the end surface of the insulating member 21 at one end of the electrode terminal 2 .

[0089] Along the axis of the conductive pillar 231, the boss 2311 protrudes from the end surface of the insulating member 21. The boss 2311 is annular and coaxial with the conductive pillar 231. The outer contour of the boss 2311 can be smaller than or equal to the outer contour of the end surface.

[0090] In the technical solution of the above embodiment, a boss 2311 is provided at the other end of the conductive pillar 231 to facilitate connection of the conductive pillar 231 with an external device, thereby reducing wear on the insulating member 21 when connecting with the external device.

[0091] In some embodiments of the present application, Figure 5 and Figure 8 As shown, the connecting member 22 includes a first connecting portion 221 and a second connecting portion 222; the first connecting portion 221 is cylindrical and encloses the outer edge of the pole, and the first connecting portion 221 is provided with a coupling hole 2211, which passes through the side wall of the first connecting portion 221, and the insulating member 21 is covered on the outer surface of the first connecting portion 221 and filled in the coupling hole 2211; the second connecting portion 222 is integrally formed with the first connecting portion 221 and welded to the shell 3, the second connecting portion 222 is annular, and the inner edge is connected to the first connecting portion 221.

[0092] The connector 22 is integrally formed. For example, the connector 22 can be stamped from an aluminum plate. The connector 22 can have one or more coupling holes 2211. When there are multiple coupling holes 2211, the multiple coupling holes 2211 are distributed in a circular array.

[0093] In the technical solution of the above embodiment, the insulating member 21 covers the outer surface of the first connecting portion 221, thereby insulating the outer surface of the first connecting portion 221. The coupling hole 2211 of the first connecting portion 221 extends through the side wall of the first connecting portion 221, facilitating the flow of the insulating member 21 material during the molding of the electrode terminal 2 and improving the connection strength between the insulating member 21 and the connecting member 22, thereby improving the molding quality of the electrode terminal 2. The second connecting portion 222 is annular, and its inner edge is connected to the first connecting portion 221. Therefore, the point where the second connecting portion 222 is welded to the outer shell 3 is located outside the first connecting portion 221 and the insulating member 21. This not only increases the connection surface between the connecting member 22 and the outer shell 3 and improves the connection strength, but also reduces the impact of welding on the insulating member 21.

[0094] In some embodiments of the present application, Figure 8 As shown, a blocking portion 212 is provided at one end of the insulating member 21 . The blocking portion 212 is ring-shaped and is located between the conductive sheet 232 and the housing 3 .

[0095] The blocking portion 212 is annular and has an inner hole. The outline of the inner hole is smaller than the outer outline of the pole, and a portion of an end surface of the conductive sheet 232 can be exposed.

[0096] In the technical solution of the above embodiment, the blocking portion 212 of the insulating part 21 is annular and is located between the conductive sheet 232 and the outer shell 3. It can prevent the conductive sheet 232 from contacting the outer shell 3, provide axial limitation for the conductive sheet 232, and expose a portion of the conductive sheet 232 to facilitate the direct or indirect connection of the conductive sheet 232 to the electrode terminal 2.

[0097] In some embodiments of the present application, Figure 8 As shown, from one end of the housing 3 to the other end, the insulating part 21 is arranged to be closed, and the outer contour gradually shrinks; the insulating part 21 is made of polymer material, and the connecting part 22 is made of metal material. The connecting part 22, the pole and the insulating part 21 are injection molded as a whole.

[0098] The electrode terminal 2 can be cylindrical, with the outer profile of the insulating member 21 gradually decreasing along the axis of the electrode terminal 2 from the end where the conductive sheet 232 is located to the end where the conductive post 231 is located. The connector 22 and the post are both made of metal, and the insulating member 21 can be thermoformed. Using an injection molding process, the connector 22, post, and insulating member 21 can be integrated into one. The injection molding of the electrode terminal 2 is assisted by a mold. The mold can have multiple cavities, each of which can mold an electrode terminal 2.

[0099] In the technical solution of the above embodiment, the insulating member 21 is arranged to be closed and has a draft angle, which is beneficial for demoulding the electrode terminal 2 and facilitates the injection molding operation.

[0100] Please refer to Figure 9 , Figure 9 Schematic diagram of the disassembly of the cover provided in some embodiments of the present application.

[0101] In some embodiments of the present application, the housing 3 includes a shell 32 and a cover plate 31, the cover plate 31 is connected to one end of the shell 32, and encloses a accommodating cavity with the shell 32; an insulating pad 313 is provided on the cover plate 31, and the insulating pad 313 is located in the accommodating cavity, covering the surface of the cover plate 31, and is formed as one piece with the cover plate 31.

[0102] Illustratively, the insulating gasket 313 can be hot-melt onto the cover plate 31, covering the end surface of the cover plate 31 facing the accommodating cavity (the insulating gasket 313 is provided with holes corresponding to the electrode terminal 2, the injection hole 312, and the explosion-proof valve, and the cover plate 31 is provided with the injection hole 312, the valve hole of the explosion-proof valve, and the hole for connecting the electrode terminal 2 with the electrode assembly 4).

[0103] In the technical solution of the above embodiment, the electrode terminal 2 is integrally formed and then welded to the cover plate 31. The cover plate 31 and the insulating pad 313 are integrally formed. The cover plate 31 has a stronger integrity and can make full use of the space in the axial direction of the battery cell 1. As a result, the electrode assembly 4 can be made larger at the same volume, thereby improving the energy density.

[0104] In some embodiments of the present application, the outer diameter of the housing 3 is greater than 46 mm; the cover plate 31 and the shell 32 are welded together on the circumferential surface; or the cover plate 31 and the shell 32 are welded together on the end surface.

[0105] The outer diameter of the housing 3 is greater than 46 mm, for example, it can be 47 mm, 48 mm, 49 mm, 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, 59 mm, 60 mm, and above 60 mm.

[0106] In the technical solution of the above embodiment, the design of the electrode terminal 2 and the cover plate 31 is applicable to large cylindrical batteries 100 (cylindrical batteries 100 with a diameter greater than 46 mm), and the outer shell 3 of the battery cell 1 can be welded by straight welding (the cover plate 31 and the shell 32 are welded together on the end surface) or side welding (the cover plate 31 and the shell 32 are welded together on the circumferential surface).

[0107] Please refer to Figure 12 , Figure 12 This is a top view of a battery cell provided in some other embodiments of the present application.

[0108] In some embodiments of the present application, a first explosion-proof valve 311 is installed on the cover plate 31, and the first explosion-proof valve 311 is oblong; and / or a second explosion-proof valve 314 is installed on the cover plate 31, and the second explosion-proof valve 314 is circular.

[0109] The cover plate 31 can be installed with only the first explosion-proof valve 311, only the second explosion-proof valve 314, or both. Taking the first explosion-proof valve 311 as an example, the first explosion-proof valve 311 includes a first patch 3111, a first valve disc 3113, and a first valve hole 3112 formed in the cover plate 31. The first valve disc 3113 is located on the end surface of the cover plate 31 facing the accommodating cavity, while the first patch 3111 is located on the end surface of the cover plate 31 facing away from the accommodating cavity. The first patch 3111 provides protection for the first valve disc 3113. The first explosion-proof valve 311 is in the shape of an oblong, which is formed by connecting two parallel lines between two semicircles.

[0110] In the technical solution of the above embodiment, when the battery cell 1 is a large cylindrical battery 100, one explosion-proof valve or multiple explosion-proof valves may be provided, and the shape of the explosion-proof valve may also be provided in various forms.

[0111] Please refer to Figure 10 and Figure 11 , Figure 10 A schematic diagram of disassembling a battery cell provided in some embodiments of the present application; Figure 11 Schematic diagram of the structure of the current collecting parts provided in other embodiments of the present application.

[0112] In some embodiments of the present application, Figure 10 As shown, there are two electrode terminals 2, both of which are mounted on the cover plate 31; the electrode assembly 4 includes an electrode body 43, a positive electrode tab 41 and a negative electrode tab 42, the positive electrode tab 41 and the negative electrode tab 42 are located at the same end of the electrode body 43, the positive electrode tab 41 is connected to one electrode terminal 2, and the negative electrode tab 42 is connected to the other electrode terminal 2.

[0113] The two electrode terminals 2 serve as a positive electrode and a negative electrode, respectively. The conductive post 231 of the positive electrode terminal 2 and the conductive sheet 232 are made of aluminum, while the conductive post 231 of the negative electrode terminal 2 and the conductive sheet 232 are made of copper.

[0114] The electrode assembly 4 further includes an insulating film 44 , which is sleeved on the outside of the electrode body 43 and serves as insulation between the housing 3 and the electrode body 43 .

[0115] In the technical solution of the above embodiment, both electrode terminals 2 are mounted on the cover plate 31, the positive electrode tab 41 and the negative electrode tab 42 are located at the same end of the electrode body 43, and the positive and negative electrodes are output from the same side of the battery cell 1, which can reduce the space occupied by the electrode assembly 4. Compared with outputting the positive and negative electrodes on both sides, the energy density of the battery cell 1 is improved for the same volume, saving space at the same energy density. The battery cell 1 uses two electrode terminals 2 as the positive and negative electrodes for external connection, which is highly safe and can prevent high-voltage sparks in the event of double-point insulation failure in the battery module 100.

[0116] In some embodiments of the present application, a current collector 5 may also be included. The current collector 5 serves as a medium for connecting the electrode assembly 4 to the electrode terminal 2. The current collector 5 connects the positive electrode tab 41 to the positive electrode terminal 2 and the negative electrode tab 42 to the negative electrode terminal 2, and prevents short circuits during the connections. The current collector 5 can take various forms.

[0117] In some embodiments of the present application, Figure 10 As shown, there are two current collecting members 5, and they are symmetrically distributed; the current collecting members 5 include a current collecting portion 52 and a transition portion 51, the current collecting portion 52 is fan-shaped, and the center of the circle coincides with the axis of the electrode body 43, and the transition portion 51 is columnar, and the current collecting portion 52 is connected at the center of the fan-shaped circle; the current collecting portion 52 of one current collecting member 5 is connected to the positive electrode tab 41, and the transition portion 51 is connected to one electrode terminal 2; the current collecting portion 52 of the other current collecting member 5 is connected to the negative electrode tab 42, and the transition portion 51 is connected to the other electrode terminal 2.

[0118] As a design of the current collector 5, the current collector 5 is a single component, with two used simultaneously within the battery cell 1. The current collector 5 can be formed using a stamping process. One current collector 5 is made of aluminum, with its current collecting portion 52 welded to the positive electrode tab 41 of the electrode assembly 4. Its adapter portion 51 passes through the insulating pad 313 and is welded to the positive electrode terminal 2. The other current collector 5 is made of copper, with its current collecting portion 52 welded to the negative electrode tab 42 of the electrode assembly 4. Its adapter portion 51 passes through the insulating pad 313 and is welded to the positive electrode terminal 2. The two current collectors 5 are spaced apart to prevent short circuits.

[0119] In the technical solution of the above embodiment, the current collecting portion 52 is fan-shaped, which can increase the connection area with the positive electrode tab 41 or the negative electrode tab 42, thereby increasing the flow area. The columnar adapter 51 connects to the current collecting portion 52 at the center of the circle, and the cross-sectional area of ​​the connection is small, which can provide a certain degree of overcurrent protection. The current collecting member 5 is an overall sheet-like structure with a protrusion, which is low in processing cost and takes up little space, which is conducive to improving the energy density of the battery cell 1.

[0120] In some embodiments of the present application, Figure 11As shown, the current collecting piece 5 includes a current collecting piece 53 and an insulating frame 54. There are two current collecting pieces 53, which are symmetrically installed at both ends of the insulating frame 54 and are formed as one piece with the insulating frame 54. The current collecting piece 53 includes a current collecting section 531, a transition section 532 and a transfer section 533. One end of the transition section 532 is connected to one end of the current collecting section 531, and the other end of the transition section 532 is connected to one end of the transfer section 533. The current collecting section 531 and the transfer section 533 are arranged in parallel, and the transfer section 533 is located between the current collecting section 531 and the insulating pad 313. The current collecting section 531 of one current collecting piece 53 is connected to the positive electrode tab 41, and the transfer section 533 is connected to one electrode terminal 2. The current collecting section 531 of the other current collecting piece 53 is connected to the negative electrode tab 42, and the transfer section 533 is connected to the other electrode terminal 2.

[0121] As another design for the current collector 5, the current collector 5 is a single component used individually within a battery cell 1. The two current collector pieces 53 can be made of copper and aluminum, respectively. The current collector piece 53 is bent at a transition section 532. The current collecting section 531 and the transition section 533 are arranged parallel to each other, spaced apart, and both sections 531 and 533 are perpendicular to the axis of the battery cell 1.

[0122] In the technical solution of the above embodiment, the two current collecting pieces 53 and the insulating frame 54 are integrally formed, which enhances reliability. The current collecting section 531 and the transition section 533 are parallel and spaced apart, allowing for simultaneous welding of the current collecting element 5 and the electrode terminal 2, as well as the current collecting element 5 and the electrode assembly 4, thereby improving welding efficiency.

[0123] In some embodiments of the present application, Figure 11 As shown, the insulating frame 54 includes a first insulating plate 542 and a second insulating plate 541. The two ends of the first insulating plate 542 are respectively connected to a collecting section 531, and the two ends of the second insulating plate 541 are respectively connected to a transition section 533; a through groove is provided on the first insulating plate 542; a transition protrusion 5331 is provided on the transition section 533, and the transition protrusion 5331 is welded to the electrode terminal 2.

[0124] The two current collecting sections 531 are separated by a first insulating plate 542 , and the two transition sections 533 are separated by a second insulating plate 541 . Along the axis of the battery cell 1 , the through groove passes through the first insulating plate 542 , and the transition protrusion 5331 protrudes from the surface of the transition section 533 .

[0125] In the technical solution of the above embodiment, a first insulating plate 542 is used to insulate the two current collecting sections 531, and a second insulating plate 541 is used to insulate the two transition sections 533, thereby improving the reliability of the current collecting member 5. A through-groove is provided on the first insulating plate 542 to facilitate liquid injection and venting of the electrode assembly 4. A transition protrusion 5331 is provided on the transition section 533 to facilitate welding to the electrode terminal 2.

[0126] In a second aspect, some embodiments of the present application provide a battery 100 , which includes a battery cell 1 provided by the above technical solution.

[0127] In a third aspect, some embodiments of the present application provide an electrical device, which includes the battery 100 provided by the above technical solution, and the battery 100 is used for power supply.

[0128] The battery 100 and the electrical device provided in the embodiments of the present application have all the beneficial effects of the battery cell 1 in any of the embodiments of the first aspect described above. For details, please refer to the specific description of the battery cell 1 in the above embodiments, which will not be repeated here.

[0129] In some embodiments of the present application, Figures 3 to 11 As shown, the battery cell 1 is a cylindrical battery 100 with a diameter greater than 60 mm. The positive electrode tab 41 and the negative electrode tab 42 are both located on the same side of the electrode body 43. Both electrode terminals 2 are integrally formed and welded to the cover plate 31. The insulating gasket 313 is heat-sealably bonded to the cover plate 31. The cover plate 31 is provided with a first explosion-proof valve 311 and a liquid injection port 312. Of the two electrode terminals 2, the conductive post 231 and conductive sheet 232 of one electrode terminal 2 are both made of aluminum, while the conductive post 231 of the other electrode terminal 2 is made of aluminum and the conductive sheet 232 is made of copper. This not only reduces material costs but also makes the electrode terminals 2 more adaptable to complex operating conditions, thereby increasing their service life. Through-hole welding and laser welding can be used to weld the electrode terminals 2 to the current collector 5. The current collector 5 can be a stamped current collector 5 comprising a current collecting portion 52 and a transition portion 51, or an injection molded current collector 5 comprising a current collecting sheet 53 and an insulating frame 54. The cover plate 31 and the housing 32 can be connected by welding using straight welding or side welding.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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: The outer shell is cylindrical and has a receiving cavity inside; an electrode assembly, mounted in the accommodating cavity; Electrode terminals, including poles, connectors and insulating parts; The electrode column includes a conductive sheet and a conductive column, one side of the conductive sheet is connected to the electrode assembly, and the other side is in contact with the conductive column; The connecting piece surrounds the outer side of the pole and is connected to the housing; The insulating member is filled between the connecting member and the pole, and is formed into one piece with the connecting member and the pole.

2. The battery cell according to claim 1, wherein: The corrosion resistance of the conductive column is not less than that of the conductive sheet.

3. The battery cell according to claim 1, wherein: The conductive column is annular, and a flange is provided at one end. The flange is fitted with the conductive sheet, and the outer contour of the flange coincides with the outer contour of the conductive sheet.

4. The battery cell according to claim 3, characterized in that The pole is provided with a coupling groove, which passes through the flange and the conductive sheet. The insulating member is provided with a coupling protrusion, which is located in the coupling groove.

5. The battery cell according to claim 3, characterized in that: The other end of the conductive column is provided with a boss, and at one end of the electrode terminal, the boss protrudes from the end surface of the insulating member; The conductive sheet is made of copper or aluminum, and the conductive column is made of aluminum.

6. The battery cell according to claim 1, characterized in that The connecting piece includes: The first connecting portion is cylindrical and surrounds the outer edge of the pole. The first connecting portion is provided with a coupling hole, the coupling hole passes through the side wall of the first connecting portion, and the insulating member is coated on the outer surface of the first connecting portion and filled in the coupling hole. The second connecting portion is integrally formed with the first connecting portion and is welded to the shell. The second connecting portion is annular, and the inner edge of the second connecting portion is connected to the first connecting portion.

7. The battery cell according to claim 1, characterized in that One end of the insulating member is provided with a blocking portion, which is ring-shaped and located between the conductive sheet and the shell.

8. The battery cell according to claim 1, wherein: From one end of the housing to the other end, the insulating member is arranged to be closed, and the outer contour gradually shrinks; The insulating member is made of a polymer material, the connecting member is made of a metal material, and the connecting member, the pole and the insulating member are injection-molded into one piece.

9. The battery cell according to claim 1, characterized in that The housing includes a shell and a cover plate, wherein the cover plate is connected to one end of the shell and encloses the accommodating cavity together with the shell; An insulating pad is provided on the cover plate. The insulating pad is located in the accommodating cavity, covers the surface of the cover plate, and is formed as one piece with the cover plate.

10. The battery cell according to claim 9, characterized in that The outer diameter of the housing is greater than 46 mm; The cover plate is welded to the shell on the circumferential surface; or The cover plate is welded to the shell at the end surface.

11. The battery cell according to claim 9, characterized in that A first explosion-proof valve is installed on the cover plate, and the first explosion-proof valve is in an oblong shape; and / or A second explosion-proof valve is installed on the cover plate, and the second explosion-proof valve is circular.

12. The battery cell according to claim 9, characterized in that There are two electrode terminals, and both of the electrode terminals are mounted on the cover plate; The electrode assembly includes an electrode body, a positive electrode tab and a negative electrode tab. The positive electrode tab and the negative electrode tab are located at the same end of the electrode body. The positive electrode tab is connected to one of the electrode terminals, and the negative electrode tab is connected to the other electrode terminal.

13. The battery cell according to claim 12, characterized in that: It also includes two current collecting pieces, which are symmetrically distributed; The current collecting member includes a current collecting portion and a transition portion. The current collecting portion is fan-shaped, and the center thereof coincides with the axis of the electrode body. The transition portion is columnar and connected to the current collecting portion at the center of the fan-shaped portion. The current collecting portion of one of the current collecting members is connected to the positive electrode tab, and the transition portion is connected to one of the electrode terminals; The current collecting portion of the other current collecting member is connected to the negative electrode tab, and the transition portion is connected to the other electrode terminal.

14. The battery cell according to claim 12, characterized in that It also includes a current collecting piece, which includes a current collecting sheet and an insulating frame. There are two current collecting sheets, which are symmetrically installed at both ends of the insulating frame and are formed as one piece with the insulating frame. The current collecting piece includes a current collecting section, a transition section and a transfer section, one end of the transition section is connected to one end of the current collecting section, and the other end of the transition section is connected to one end of the transfer section. The current collecting section and the transfer section are arranged in parallel, and the transfer section is located between the current collecting section and the insulating pad; The current collecting section of one of the current collecting sheets is connected to the positive electrode tab, and the transition section is connected to one of the electrode terminals; The current collecting section of another current collecting sheet is connected to the negative electrode tab, and the transition section is connected to another electrode terminal.

15. The battery cell according to claim 14, characterized in that The insulating frame includes a first insulating plate and a second insulating plate, wherein both ends of the first insulating plate are respectively connected to one of the collecting sections, and both ends of the second insulating plate are respectively connected to one of the transition sections; The first insulating plate is provided with a through groove; The transition section is provided with a transition protrusion, and the transition protrusion is welded to the electrode terminal.

16. A battery, characterized in that: The battery cell comprises the battery cell according to any one of claims 1 to 15.

17. An electrical device, characterized in that: The battery of claim 16 is included for supplying power.

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