Battery monomer, battery device and electric device

Abstract

The utility model provides a battery monomer, a battery device and a power utilization device, and relates to the technical field of new energy batteries. Wherein the battery monomer is cylindrical, the battery monomer comprises a shell and an electrode assembly, the shell comprises an end cover, a first electrode terminal is arranged on the end cover in a protruding mode, the first electrode terminal is of a non-rotation structure, and the first electrode terminal is used for being matched with a profiling structure on an external component so as to be connected with the external component; the electrode assembly is arranged in the shell, and the electrode assembly is electrically connected with the first electrode terminal. According to the battery monomer disclosed by the embodiment of the invention, after the first electrode terminal is matched with the profiling structure on the external component, the first electrode terminal and the profiling structure can be mutually limited, so that the first electrode terminal is prevented from rotating relative to the profiling structure, the battery monomer is further prevented from rotating relative to the external component, and the reliability of connection between the first electrode terminal and the external component is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy batteries, and more particularly to a battery monomer, a battery device, and a power consumption device. BACKGROUND

[0002] A battery monomer is a basic unit of a battery device, and the battery monomer includes an electrode terminal, which is a key hub for realizing conduction between an internal circuit of the battery monomer and an external circuit.

[0003] The electrode terminal generally includes a positive electrode terminal and a negative electrode terminal. When the battery monomer is in use, the positive electrode terminal and the negative electrode terminal are connected to the circuit to realize conduction between the battery monomer and an external component, so that the battery monomer can supply power to the circuit.

[0004] For a cylindrical battery, the battery monomer is in a cylindrical shape, and the electrode terminal is generally located on the end cover at both ends. Since the battery monomer is a circular arc surface, the battery monomer often needs to be specially positioned during use to prevent the rotation of the battery monomer from affecting the structural stability of the battery device and further affecting the current stability of the circuit of the battery device. SUMMARY

[0005] The purpose of the embodiments of the application is to provide a battery monomer, a battery device, and a power consumption device to improve the stability of the assembly structure of the cylindrical battery monomer during use and further improve the current stability of the circuit in which the battery monomer is located.

[0006] To achieve the above purpose, the first aspect of the embodiments of the application adopts the technical solution of providing a battery monomer, which is in a cylindrical shape and includes a shell and an electrode assembly. The shell includes an end cover, and a first electrode terminal is arranged on the end cover. The first electrode terminal is in a non-rotary structure and is used to cooperate with a profiling structure on an external component to be connected to the external component. The electrode assembly is arranged in the shell and is electrically connected to the first electrode terminal.

[0007] By adopting the above solution, when the first electrode terminal cooperates with the profiling structure on the external component, the first electrode terminal and the profiling structure can be limited relative to each other to prevent the first electrode terminal from rotating relative to the profiling structure and further prevent the battery monomer from rotating relative to the external component, thereby improving the reliability of the connection between the first electrode terminal and the external component.

[0008] In some embodiments, the first electrode terminal is configured to protrude outwardly from the shell.

[0009] In some embodiments, the first electrode terminal is configured to be recessed inwardly from the shell.

[0010] In some embodiments, the shell comprises two oppositely arranged end covers, and each end cover is provided with a first electrode terminal, one of the first electrode terminals is configured to protrude outward of the shell, and the other first electrode terminal is configured to recess inward of the shell.

[0011] The above three schemes provide the battery cell with three different first electrode terminals, each of which can be connected to an external component through a matching profiling structure, thereby improving the reliability of the connection between the first electrode terminal and the external component and providing more selectivity for reliable connection between the first electrode terminal and the external component.

[0012] In some embodiments, the first electrode terminal is provided with a first positioning structure, which is adapted to the second positioning structure on the external component.

[0013] When the battery cell and the external component are assembled, the first electrode terminal can be quickly matched with the external component in a specific matching orientation through the cooperation of the first positioning structure and the second positioning structure, and can further prevent relative displacement between the battery cell and the external component, which is conducive to the quick assembly of the battery cell and the external component, and further improves the reliability of the connection between the first electrode terminal and the external component and the current stability of the circuit in which the battery cell is located.

[0014] In some embodiments, the first positioning structure comprises a positioning groove provided on the first electrode terminal.

[0015] And / or, the first positioning structure comprises a positioning protrusion provided on the first electrode terminal.

[0016] By adopting the above scheme, the positioning protrusion and the positioning groove are structures that are easy to process and easy to implement. By taking the positioning protrusion or the positioning groove as the first positioning structure, the difficulty of implementing the first positioning structure can be reduced, and the processing cost can be reduced.

[0017] In some embodiments, the projection area of the first electrode terminal along the axis direction of the battery cell is a, and the projection area of the battery cell along the axis direction thereof is A, and a / A≥50%.

[0018] By adopting the above scheme, when the first electrode terminal is electrically connected to other conductive components, the area of the first electrode terminal and the other conductive components is large due to the large area of the first end face. Therefore, the first electrode terminal generates less heat during use of the battery cell, reduces the probability of damage caused by heat of the first electrode terminal, and prolongs the service life of the battery cell.

[0019] In some embodiments, the end cover is provided with a derived structure on an inner side of the shell, the derived structure is located corresponding to the first electrode terminal, the derived structure is configured to be recessed to the outside of the shell when the first electrode terminal is configured to protrude to the outside of the shell; the derived structure is configured to protrude to the inside of the shell when the first electrode terminal is configured to be recessed to the inside of the shell; the battery monomer further comprises an adapter, the adapter is arranged in the shell, and the adapter is provided with a supporting portion corresponding to the derived structure on a side close to the end cover, and the adapter is electrically connected to the electrode assembly on a side away from the end cover.

[0020] By adopting the above scheme, the supporting portion cooperates with the derived structure, on the one hand, the supporting portion can support the derived structure, so that the end cover is strengthened at the derived structure, and the end cover is not easy to be damaged at the first electrode terminal, on the other hand, the adapter can be used as an electrical connection medium between the tab and the first electrode terminal, through the cooperation of the supporting portion and the derived structure, the current between the electrode assembly and the first electrode terminal can flow through the adapter and the supporting portion, and the resistance value is relatively small, reducing the probability of damage of the first electrode terminal due to heating, and prolonging the service life of the battery monomer.

[0021] In some embodiments, the contact area of the adapter and the end cover is greater than the contact area of the supporting portion and the derived structure.

[0022] By adopting the above scheme, the contact area of the adapter and the end cover is larger, which can better support the end cover and further reduce the contact resistance of the adapter and the end cover.

[0023] In some embodiments, the battery monomer further comprises an explosion-proof valve; the explosion-proof valve is arranged on the end cover; the adapter comprises a transition region and a weak region connected thereto, the weak region is at least partially arranged opposite to the explosion-proof valve, and the weak region is configured to make the gas on both sides of the adapter flow through the weak region when the internal pressure of the battery monomer exceeds a preset threshold.

[0024] By adopting the above scheme, when the internal pressure of the shell exceeds the preset threshold, the gas in the shell can reach the explosion-proof valve through the weak region and be directed sprayed out of the explosion-proof valve, preventing the pressure in the battery monomer from rising too high and causing more serious accidents such as thermal runaway.

[0025] In some embodiments, the weak region satisfies at least one of the following conditions:

[0026] (1) The thickness of at least part of the weak region is less than the thickness of the transition region.

[0027] (2) A connecting region is arranged between the weak region and the transition region, the thickness of the connecting region is less than the thickness of the weak region and the thickness of the transition region.

[0028] (3) A perforation is arranged at the junction of the weak region and the transition region.

[0029] (4) The weak area is configured as a through hole.

[0030] By adopting the above scheme, in the first scheme, the weak area itself has a region with a relatively thin thickness, which has a relatively low strength and is prone to breakage, in the second scheme, the connecting area has a relatively low strength and is prone to breakage, so that the gas flow can pass through the weak area, in the third scheme, the weak area is more prone to breakage at the junction with the adapter area, so that the gas flow can pass through the weak area, and in the fourth scheme, the weak area itself is a through hole, so that in any case, the gas flow on both sides can pass through, so that the explosion-proof valve can act in time. The structural arrangement of the adapter described above can meet the condition that when the internal pressure of the battery monomer exceeds the preset threshold, the gas on both sides of the adapter passes through the weak area, providing multiple feasible schemes for implementing the embodiments of the application.

[0031] In some embodiments, the shell is configured as a closed annular cylindrical structure relative to the external environment, a first hole is formed in the middle of the annular cylindrical structure, and the electrode assembly is arranged around the hole wall of the first hole.

[0032] By adopting the above scheme, the electrode assembly is arranged around the hole wall of the first hole, so that the heat in the middle of the electrode assembly can be dissipated through the first hole when the battery monomer is in use, slowing down the temperature rise speed in the middle of the electrode assembly.

[0033] In a second aspect, the embodiments of the present application provide a battery device, which comprises a plurality of battery monomers in any of the preceding embodiments, and the plurality of battery monomers are arranged along the axial direction. In two adjacent battery monomers arranged along the axial direction, the first electrode terminal of one battery monomer is in profiled cooperation with the first electrode terminal of the other battery monomer, so as to electrically connect the two adjacent battery monomers.

[0034] By adopting the above scheme, in two adjacent battery monomers arranged along the axial direction, the first electrode terminal of one battery monomer is in profiled cooperation with the first electrode terminal of the other battery monomer. In this structure, in the two adjacent battery monomers, one battery monomer is an external component relative to the other battery monomer, and in the two profiled cooperating first electrode terminals, one first electrode terminal is a profiled structure relative to the other first electrode terminal. The profiled cooperation of the two first electrode terminals can prevent the relative rotation of the adjacent battery monomers due to the non-rotational structure of the first electrode terminal, thereby improving the positional stability of the battery monomers and the electrical connection reliability of the adjacent battery monomers, and further improving the structural stability of the battery device and the stability of the current output. Moreover, by arranging the battery monomers in this way, the plurality of battery monomers are arranged to form a linear structure, which is neat in structure and has strong inclusivity for installation space, and is conducive to forming a battery device with high energy density.

[0035] In a third aspect, the embodiments of the present application provide another battery device, which comprises a plurality of battery cells in any of the foregoing embodiments and a conductive pad configured to electrically connect two adjacent battery cells, the conductive pad being provided with a profiled structure, and the battery cell electrically connected to the conductive pad has a first electrode terminal, which is matched with the profiled structure to be electrically connected to the conductive pad.

[0036] In this embodiment, the conductive pad is an external component, and the matching mode of the first electrode terminal of the battery cell with the conductive pad is that the first electrode terminal is electrically connected to the conductive pad by matching with the profiled structure on the conductive pad. This matching mode can reduce the probability of relative rotation between the battery cell and the conductive pad, improve the positional stability of the battery cell, and further improve the electrical connection reliability between the battery cell and the conductive pad, so that the battery device has a relatively stable current output.

[0037] In some embodiments, the first electrode terminals on the two battery cells adjacent to the conductive pad are both outwardly protruding, and the profiled structures on both sides of the conductive pad are both configured as profiled grooves to be matched with the first electrode terminals on both sides, respectively.

[0038] In some embodiments, the first electrode terminals on the two battery cells adjacent to the conductive pad are both inwardly recessed, and the profiled structures on both sides of the conductive pad are both configured as profiled protrusions to be matched with the first electrode terminals on both sides, respectively.

[0039] In some embodiments, of the first electrode terminals on the two battery cells adjacent to the conductive pad, one is outwardly protruding, and the other is inwardly recessed, and the profiled structure on the side of the conductive pad facing the recessed first electrode terminal is configured as a profiled protrusion, and the profiled structure on the side of the conductive pad facing the protruding first electrode terminal is configured as a profiled groove to be matched with the first electrode terminals on both sides, respectively.

[0040] In the foregoing three embodiments, the two sides of the conductive pad can be non-rotatably matched with the first electrode terminals, further enhancing the structural stability of the battery cell assembly, so that the battery device has a relatively stable current output.

[0041] In a fourth aspect, the embodiments of the present application provide a power consumption device, which comprises the battery cell or the battery device in the foregoing embodiments.

[0042] By adopting the foregoing scheme, the battery cell or the battery device can provide a relatively stable current supply for the power consumption device, so that the power consumption device can work stably. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0044] Figure 1 The structural schematic diagram of a vehicle provided by the embodiments of the present application.

[0045] Figure 2 The exploded structural schematic diagram of a battery device provided by the embodiments of the present application.

[0046] Figure 3 The exploded structural schematic diagram of a first battery monomer provided by the embodiments of the present application.

[0047] Figure 4 The structural schematic diagram of an external component provided by the embodiments of the present application.

[0048] Figure 5 The structural schematic diagram of a battery monomer provided by the embodiments of the present application.

[0049] Figure 6 The structural schematic diagram of another battery monomer provided by the embodiments of the present application.

[0050] Figure 7 The structural schematic diagram of an end cover provided by the embodiments of the present application.

[0051] Figure 8 The structural schematic diagram of another external component provided by the embodiments of the present application.

[0052] Figure 9 The structural schematic diagram of the inner side surface of a third end cover provided by the embodiments of the present application.

[0053] Figure 10 The exploded structural schematic diagram of a second battery monomer provided by the embodiments of the present application.

[0054] Figure 11 The structural schematic diagram of an adapter provided by the embodiments of the present application.

[0055] Figure 12 The exploded structural schematic diagram of a third battery monomer provided by the embodiments of the present application.

[0056] Figure 13 The structural schematic diagram of a fourth end cover provided by the embodiments of the present application.

[0057] Figure 14A plurality of battery cell assembly state structural schematic diagrams provided by the embodiment of the application.

[0058] Figure 15 A plurality of battery cell assembly structural partial exploded schematic diagrams provided by the embodiment of the application.

[0059] Figure 16 Another plurality of battery cell assembly structural partial exploded schematic diagrams provided by the embodiment of the application.

[0060] Figure 17 Still another plurality of battery cell assembly structural partial exploded schematic diagrams provided by the embodiment of the application.

[0061] In the drawings, various reference numerals refer to:

[0062] 01, vehicle; 1000, battery device; 2000, controller; 3000, motor;

[0063] 1100, box body; 1110, structural plate;

[0064] 1200, battery cell assembly;

[0065] 1300, battery cell; 1310, shell; 1311, housing; 1312, end cover; 1320, electrode assembly; 1321, tab; 1330, electrode terminal; 1331, positive electrode terminal; 1332, negative electrode terminal; 1301, first electrode terminal; 1302, first positioning structure; 1304, derived structure; 1340, explosion-proof valve; 1350, adapter; 1351, weak area; 1352, support portion; 1353, adapter area; 1354, connection area; 1370, first hole; 1380, sampling terminal;

[0066] 1400, external member; 1410, profiling structure; 1401, second positioning structure;

[0067] 1500, conductive gasket. DETAILED DESCRIPTION

[0068] In order to make the technical problems to be solved by the application, the technical solutions and the beneficial effects clearer, the application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0069] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0070] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0071] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0072] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0073] Unless otherwise specified, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0074] At present, power batteries are more and more widely used. Power batteries are not only used in energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields.

[0075] The battery cell is the basic unit of the battery device. According to the different shapes, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft package battery cell or a battery cell of other shapes. The prismatic battery cell includes a square cell, a blade-shaped cell, a multi-prismatic battery, and a multi-prismatic battery such as a hexagonal prism battery.

[0076] Among them, the electrode terminal of the cylindrical battery cell is usually arranged on the end face. In use, the electrode terminal is connected with the external member to connect the battery cell into the circuit. However, it is found in use that the electrode terminal of the battery cell often has wear problems. At the same time, if the electrode terminal is welded with the external member, the welding part often has cracking problems, which makes it difficult for the cylindrical battery cell to realize long-term stable output of current.

[0077] The inventor has found through research that this is because the circumferential surface of the cylindrical battery monomer is an arc surface compared with the prismatic battery monomer and the soft package battery monomer, which causes the cylindrical battery monomer to be unable to limit rotation of the battery monomer during use, the battery monomer is subjected to vibration, or the use direction is changed, and the battery monomer often has a tendency to rotate, thereby causing the electrode terminal and the external component to generate a relative rotation force, causing wear of the electrode terminal and tearing of the welding part.

[0078] Therefore, the embodiments of the present application propose that the electrode terminal of the cylindrical battery monomer is designed as a non-rotary structure, when the electrode terminal cooperates with the external component, a profiling structure matched with the electrode terminal can be arranged on the external component, and the cooperation of the electrode terminal and the profiling structure can realize mutual limiting of the external component and the electrode terminal, thereby preventing rotation of the battery monomer, improving the position stability of the assembled battery monomer, strengthening the electrical connection between the battery monomer and the external component, and improving the current stability of the circuit in which the battery monomer is located.

[0079] The battery device disclosed by the embodiments of the present application can be used in a power consumption device using a battery as a power source or a variety of energy storage systems using a battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0080] The following embodiments take the vehicle 01 as an example for convenience of description.

[0081] Please refer to Figure 1 , Figure 1 The vehicle 01 provided by some embodiments of the present application is a structural schematic diagram. The vehicle 01 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range extended car, etc. The vehicle 01 is internally provided with a battery device 1000, which can be arranged at the bottom, head or tail of the vehicle 01. The battery device 1000 can be used for power supply of the vehicle 01, for example, the battery device 1000 can be used as the operating power source of the vehicle 01. The vehicle 01 can also include a controller 2000 and a motor 3000, the controller 2000 is used to control the battery device 1000 to supply power to the motor 3000, for example, for the working power demand of the vehicle 01 during starting, navigation and driving.

[0082] In some embodiments of the present application, the battery apparatus 1000 can not only serve as the operating power source of the vehicle 01, but also serve as the driving power source of the vehicle 01, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 01.

[0083] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a hybrid manner.

[0084] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0085] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0086] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0087] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0088] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0089] Please refer to Figure 2 , Figure 2 An exploded structural schematic diagram of a battery apparatus 1000 provided in some embodiments of the present application is shown. As an example, the battery apparatus 1000 includes a box 1100 and battery cells 1300, and a plurality of battery cells 1300 are accommodated in the box 1100. The box 1100 is used to provide accommodation space for the battery cells 1300, and the box 1100 can adopt various structures.

[0090] As Figure 2As shown, in some embodiments, the box 1100 is a hollow structure defined by a plurality of structural plates 1110. The structural plates 1110 can be plate-shaped structures, which can be made of steel plates, iron plates, hard plastic plates, etc. The plurality of structural plates 1110 can be fixed by means of a cable tie, a bolt connection, a clamping connection, etc. to define a space for accommodating the battery monomer 1300. According to the number and structural requirements of the battery monomer 1300, the space for accommodating the battery monomer 1300 can be a cuboid space, a cylindrical space, a prism space, etc.

[0091] In some embodiments, the box 1100 can be part of the chassis structure of the vehicle 01. For example, part of the box 1100 can be at least part of the floor of the vehicle 01, or part of the box 1100 can be at least part of the cross beam and the longitudinal beam of the vehicle 01. In the embodiments of the present application, the battery monomer 1300 can be a secondary battery, which refers to a battery monomer 1300 that can be activated by charging after discharging.

[0092] The battery monomer 1300 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-acid battery, etc. The embodiments of the present application are not limited in this regard.

[0093] Please refer to Figure 3 , Figure 3 The exploded structural view of the battery monomer 1300 provided by some embodiments of the present application is shown. The battery monomer 1300 refers to the smallest unit that constitutes a battery. The battery monomer 1300 includes a shell 1310, an electrode assembly 1320, and other functional components.

[0094] Generally, the shell 1310 is composed of a casing 1311 and an end cover 1312, which refers to a component that covers the opening of the casing 1311 to isolate the internal environment of the battery monomer 1300 from the external environment. Without limitation, the shape of the end cover 1312 can be adapted to the shape of the casing 1311 to fit the casing 1311. Alternatively, the end cover 1312 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 1312 is not easily deformed when subjected to extrusion and collision, enabling the battery monomer 1300 to have higher structural strength and safety performance. The end cover 1312 can be provided with functional components such as an electrode terminal 1330. The electrode terminal 1330 can be used to electrically connect with the electrode assembly 1320 for outputting or inputting the electrical energy of the battery monomer 1300.

[0095] In some embodiments, the end cover 1312 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 1300 reaches a threshold value. The material of the end cover 1312 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations. In some embodiments, an insulating structure can also be provided on the inner side of the end cover 1312, which can be used to isolate the electrical connection components in the shell 1311 from the end cover 1312 to reduce the risk of short circuit. For example, the insulating structure can be plastic, rubber, etc.

[0096] The shell 1311 is a component for cooperating with the end cover 1312 to form the internal environment of the battery cell 1300, wherein the formed internal environment can be used to accommodate the electrode assembly 1320, the electrolyte and other components. The shell 1311 and the end cover 1312 can be independent components, and an opening can be provided on the shell 1311, and the end cover 1312 is covered on the opening to form the internal environment of the battery cell 1300. Without limitation, the end cover 1312 and the shell 1311 can also be integrated, specifically, the end cover 1312 and the shell 1311 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the inside of the shell 1311, the end cover 1312 is covered on the shell 1311. The shell 1311 can be various shapes and various sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the shell 1311 can be determined according to the specific shape and size of the electrode assembly 1320. The material of the shell 1311 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations.

[0097] The electrode assembly 1320 is a component in which electrochemical reactions occur in the battery cell 1300. One or more electrode assemblies 1320 can be contained in the shell 1311. The electrode assembly 1320 is mainly formed by laminating and winding the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting the main body of the electrode assembly 1320, and the positive electrode sheet and the negative electrode sheet each have a portion without active material constituting the tab 1321. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery, active ions, such as lithium ions, reversibly intercalate and deintercalate between the positive and negative electrode sheets to realize charging and discharging, and the tab 1321 connects the electrode terminal 1330 to form a current loop.

[0098] Figure 4 An external component structure provided by the embodiments of the present application is shown in the figure. As shown in the figure, the external component can include a shell 1311, an electrode assembly 1320, an electrode terminal 1330, an end cover 1312, and a gasket 1313. Figure 3 and Figure 4As shown, the first aspect of the embodiment of the present application adopts the technical solution of: providing a battery monomer 1300, the battery monomer 1300 is in a cylindrical shape, the battery monomer 1300 comprises an outer shell 1310 and an electrode assembly 1320, the outer shell 1310 comprises an end cover 1312, the end cover 1312 is provided with a first electrode terminal 1301, the first electrode terminal 1301 is in a non-rotational structure, the first electrode terminal 1301 is used to cooperate with a profiling structure 1410 on an external component 1400 to be connected with the external component 1400; the electrode assembly 1320 is arranged in the outer shell 1310 and is electrically connected with the first electrode terminal 1301.

[0099] The structure and function of the outer shell 1310, the end cover 1312 and the electrode assembly 1320 have been described in detail in the foregoing, and the embodiment of the present application will not be described again.

[0100] The first electrode terminal 1301 can be a positive electrode terminal 1331 of the battery monomer 1300 or a negative electrode terminal 1332, and it can be understood that one battery monomer 1300 can have only one first electrode terminal 1301 or two first electrode terminals 1301.

[0101] The external component 1400 refers to other structures except the battery monomer 1300 itself, for example, the external component 1400 can be other battery monomers, an electrically connected tab, a component structure of the box body 1100, a side wall of a mounting position of the battery monomer 1300 in use, etc.

[0102] A revolution body refers to a three-dimensional geometric body formed by rotating a plane line (generatrix) around a fixed straight line (axis) in the same plane. As the plane line forming the revolution body, it can be a straight line, a curve or a line composed of them. For example, the generatrix of a cylindrical body is a straight line parallel to the axis, and the generatrix of a spherical body is a semicircle with a diameter equal to the length of the axis. Common revolution bodies include cones, cylinders, spheres, rings, etc.

[0103] A non-revolution body is different from a revolution body, and a non-revolution body cannot be obtained by the forming method of a revolution body, and it can be understood that a three-dimensional geometric structure is either a revolution body or a non-revolution body.

[0104] The non-revolution structure involved in the embodiment of the present application can be a non-revolution body or a non-revolution groove structure formed by removing the non-revolution body on the end cover 1312.

[0105] In some embodiments, the first electrode terminal 1301 comprises an independent structure, for example, the first electrode terminal 1301 can be an independent prism, pyramid or other more complex shape structure.

[0106] In some embodiments, the first electrode terminal 1301 can also be a combined structure, i.e., the first electrode terminal 1301 comprises a plurality of independent geometric bodies, which can be the same or different, for example, the first electrode terminal 1301 comprises a plurality of cylindrical structures protruding from the surface of the end cover 1312, in which structure, although each independent cylindrical structure is a solid of revolution, the combined structure is a non-solid of revolution, therefore, in this case, the electrode terminal 1330 should also be considered as the first electrode terminal 1301.

[0107] The profiled structure 1410 can cooperate with the first electrode terminal 1301, and therefore its structure is adapted to that of the first electrode terminal 1301. In the embodiments of the present application, adaptation means that the shape and size are similar and can cooperate with each other.

[0108] From the foregoing definition, it can be deduced that the solid of revolution and the profiled structure adapted to the solid of revolution can rotate relative to each other, and the axis of rotation is substantially coincident with the axis of the solid of revolution, while the non-solid of revolution and the profiled structure 1410 adapted to the non-solid of revolution do not rotate relative to each other.

[0109] Therefore, by using the above scheme, when the first electrode terminal 1301 cooperates with the profiled structure 1410 on the external member 1400, it can be limited between the profiled structure 1410, preventing the first electrode terminal 1301 from rotating relative to the profiled structure 1410, and further preventing the battery monomer 1300 from rotating relative to the external member 1400, thereby improving the reliability of the cooperation structure between the first electrode terminal 1301 and the external member 1400.

[0110] When the external member 1400 is a conductive part, the electrical connection structure between the battery monomer 1300 and the external member 1400 is more stable and reliable; when the external member 1400 is fixed in position, after the battery monomer 1300 is assembled with the external member 1400, the position of the battery monomer 1300 is also relatively fixed, and further the connection structure between the battery monomer 1300 and other parts is more stable, thereby improving the current stability of the circuit in which the battery monomer 1300 is located.

[0111] The first electrode terminal 1301 can be provided outwardly protruding from the end cover 1312, or inwardly recessed. Correspondingly, the profiled structure 1410 on the external member 1400 can also be configured as a profiled recess or a profiled protrusion. Based on this, the following different battery monomers 1300 can be formed:

[0112] Figure 5 A structural schematic diagram of a battery monomer provided in the embodiments of the present application is shown in FIG. 13, which comprises an end cover 1312, a first electrode terminal 1301 and a second electrode terminal 1302. Figure 5As shown in some embodiments, the first electrode terminal 1301 is configured to protrude out of the shell 1310.

[0113] That is, at least one of the first electrode terminals 1301 on the battery monomer 1300 protrudes out of the shell 1310, and other first electrode terminals 1301 on the battery monomer 1300 can or can not protrude out of the shell 1310, which is not limited in the embodiments of the present application.

[0114] It can be understood that in this case, the profiled structure 1410 on the external component 1400 is a profiled groove that is adapted to the first electrode terminal 1301.

[0115] By using the above scheme, the first electrode terminal 1301 cooperates with the profiled groove to limit the relative rotation between the battery monomer 1300 and the external component 1400, thereby improving the reliability of the connection between the first electrode terminal 1301 and the external component 1400.

[0116] Figure 6 Another structural schematic diagram of a battery monomer provided by the embodiments of the present application is shown in Figure 6 As shown in some embodiments, the first electrode terminal 1301 is configured to be recessed into the shell 1310.

[0117] That is, at least one of the first electrode terminals 1301 on the battery monomer 1300 is recessed into the shell 1310, and other first electrode terminals 1301 on the battery monomer 1300 can or can not be recessed into the shell 1310, which is not limited in the embodiments of the present application.

[0118] It can be understood that in this case, the profiled structure 1410 on the external component 1400 is a profiled protrusion that is adapted to the first electrode terminal 1301.

[0119] By using the above scheme, the first electrode terminal 1301 cooperates with the profiled protrusion on the external component 1400 to limit the relative rotation between the battery monomer 1300 and the external component 1400, thereby improving the reliability of the connection between the first electrode terminal 1301 and the external component 1400.

[0120] Please refer to Figure 5 and Figure 6 In some embodiments, the shell 1310 includes two oppositely arranged end covers 1312, and each end cover 1312 is provided with one first electrode terminal 1301, one first electrode terminal 1301 is configured to protrude out of the shell 1310, and the other first electrode terminal 1301 is configured to be recessed into the shell 1310.

[0121] In the above scheme, there are two different first electrode terminals 1301 on the battery monomer 1300, in this case, the protruding first electrode terminal 1301 can or can not be matched with the recessed first electrode terminal 1301, and the embodiments of the present application do not limit this.

[0122] When the protruding first electrode terminal 1301 is matched with the recessed first electrode terminal 1301, the protruding first electrode terminal 1301 on one battery monomer 1300 can be matched with the recessed first electrode terminal 1301 on another battery monomer 1300 in adjacent battery monomers 1300, realizing non-rotary matching between adjacent battery monomers 1300, improving the stability of the relative position between adjacent battery monomers 1300, and ultimately improving the stability of the assembly structure of the battery monomer 1300 and the current stability of the circuit in which the battery monomer 1300 is located. In this case, for a target battery monomer, the adjacent battery monomers are configured as external components 1400, and the electrode terminals on the adjacent battery monomers that are matched with the first electrode terminals 1301 on the target battery monomer are configured as the profiling structures 1410.

[0123] By adopting the above scheme, the battery monomer 1300 includes two different structures of the first electrode terminal 1301, each of which can realize connection with the external component 1400 through the profiling structure 1410 matched therewith, improving the reliability of the connection of the first electrode terminal 1301 with the external component 1400.

[0124] The above three schemes provide battery monomers 1300 with three different first electrode terminals 1301, providing more selectivity for realizing reliable connection of the first electrode terminal 1301 with the external component 1400.

[0125] Figure 7 Another structure diagram of an end cover provided by an embodiment of the present application. Figure 8 Another structure diagram of an external component provided by an embodiment of the present application. As shown in Figure 7 and Figure 8 In some embodiments, the first electrode terminal 1301 is provided with a first positioning structure 1302, which is matched with a second positioning structure 1401 on the external component 1400.

[0126] The first positioning structure 1302 and the second positioning structure 1401 are structures that can be matched in a special orientation.

[0127] For example, in some embodiments, the first positioning structure 1302 comprises a positioning groove arranged on the first electrode terminal 1301; and / or, the first positioning structure 1302 comprises a positioning protrusion arranged on the first electrode terminal 1301.

[0128] It can be understood that, when the first positioning structure 1302 comprises a positioning groove arranged on the first electrode terminal 1301, the second positioning structure 1401 comprises a positioning protrusion arranged on the external member 1400; when the first positioning structure 1302 comprises a positioning protrusion arranged on the first electrode terminal 1301, the second positioning structure 1401 comprises a positioning groove arranged on the external member 1400.

[0129] In the above-mentioned scheme of the first positioning structure 1302, three possible structures are included, which are as follows:

[0130] The first positioning structure 1302 only comprises a positioning groove, for example, as shown in FIG. 13A, the first positioning structure 1302 comprises one positioning groove, and correspondingly, the second positioning structure 1401 comprises one positioning protrusion. Figure 5 and Figure 6 The first positioning structure 1302 comprises three positioning grooves, and correspondingly, the second positioning structure 1401 comprises three positioning protrusions.

[0131] The first positioning structure 1302 only comprises a positioning protrusion, for example, the first positioning structure 1302 comprises three positioning protrusions, and the second positioning structure 1401 comprises three positioning grooves.

[0132] The first positioning structure 1302 comprises both a positioning protrusion and a positioning groove, for example, the first positioning structure 1302 comprises two positioning grooves and one positioning protrusion, and correspondingly, the second positioning structure 1401 comprises two positioning protrusions and one positioning groove.

[0133] In the above-mentioned three structures, the positioning protrusion refers to a structure protruding from the surface of the body, and the positioning groove refers to a structure recessed from the surface of the body, according to the setting positions of the positioning protrusion and the positioning groove, the body can be the battery monomer 1300 or the external member 1400.

[0134] By adopting the above-mentioned scheme, the positioning protrusion and the positioning groove are structures easy to process and easy to realize, by taking the positioning protrusion and the positioning groove as the first positioning structure 1302 and the second positioning structure 1401 respectively, the implementation difficulty of the first positioning structure 1302 and the second positioning structure 1401 can be reduced, and the processing cost can be reduced.

[0135] In some other embodiments, the first positioning structure 1302 and the second positioning structure 1401 can also be positioning steps and other positioning structures, and the embodiments of the present application do not limit this.

[0136] When assembling the battery monomer 1300 and the external component 1400, the first electrode terminal 1301 can be quickly matched with the external component 1400 along a specific matching orientation through the cooperation of the first positioning structure 1302 and the second positioning structure 1401, and can further prevent the relative displacement between the battery monomer 1300 and the external component 1400, which is conducive to the quick assembly of the battery monomer 1300 and the external component 1400, and further improves the stability of the assembly structure of the battery monomer 1300 and the external component 1400, and improves the current stability of the circuit in which the battery monomer 1300 is located.

[0137] In some embodiments, the number of the first positioning structure 1302 is at least 2.

[0138] For example, the first positioning structure 1302 can be 2, 3, or 4, etc.

[0139] The at least 2 first positioning structures 1302 correspond to at least 2 second positioning structures 1401, and the number of the first positioning structure 1302 is generally the same as the number of the second positioning structure 1401.

[0140] In this way, after the cooperation of the first positioning structure 1302 and the second positioning structure 1401, not only the positioning effect can be achieved, but also the relative rotation between the battery monomer 1300 and the external component 1400 can be prevented.

[0141] In some embodiments, the projection area of the first electrode terminal 1301 along the axis direction of the battery monomer 1300 is a, the projection area of the battery monomer 1300 along the axis direction of itself is A, and a / A≥50%.

[0142] For example, the ratio of a to A can be 50%, 53.5%, 71%, 90%, etc.

[0143] The first electrode terminal 1301 generally needs to realize electrical connection through contact with other conductive structures, which can be the external component 1400 or not. The size of the projection area of the first electrode terminal 1301 along the axis direction of the battery monomer 1300 determines the size of the effective contact area that the first electrode terminal 1301 can achieve with other conductive structures to some extent, thereby affecting the size of the resistance at the connection between the first electrode terminal 1301 and other conductive structures, and further affecting the heating condition at the first electrode terminal 1301.

[0144] In the above scheme of the application, the projection area of the battery monomer 1300 along the axis direction of the battery monomer 1300 is A, and the projection area a of the first electrode terminal 1301 along the axis direction of the battery monomer 1300 is limited, so that the surface area of the first electrode terminal 1301 is not too small. When the first electrode terminal 1301 is electrically connected with other conductive members, due to the large surface area of the first electrode terminal 1301, the electrical connection area of the first electrode terminal 1301 with other conductive members can be larger. When the battery monomer 1300 is used, the first electrode terminal 1301 generates less heat, reduces the probability of damage caused by the heat of the first electrode terminal 1301, and prolongs the service life of the battery monomer 1300.

[0145] Figure 9 A structural diagram of the inner side surface of the end cover provided by the embodiment of the application is provided, Figure 10 A second exploded structural diagram of the battery monomer provided by the embodiment of the application is provided. As Figure 9 And Figure 10 As shown in some embodiments, the end cover 1312 is provided with a derived structure 1304 on the inner side of the shell 1310, the position of the derived structure 1304 corresponds to the first electrode terminal 1301, and the derived structure 1304 is configured to be recessed to the outside of the shell 1310 when the first electrode terminal 1301 is configured to protrude to the outside of the shell 1310; the derived structure 1304 is configured to protrude to the inside of the shell 1310 when the first electrode terminal 1301 is configured to be recessed to the inside of the shell 1310. The battery monomer 1300 further comprises an adapter 1350, which is arranged in the shell 1310, and the adapter 1350 is provided with a support part 1352 matched with the derived structure 1304 on the side close to the end cover 1312, and the side away from the end cover 1312 is electrically connected with the electrode assembly 1320.

[0146] The derived structure 1304 can be formed due to the forming of the first electrode terminal 1301. For example, the first electrode terminal 1301 is a protruding structure formed on the outer side surface of the end cover 1312 by stamping, and the derived structure 1304 recessed to the outside of the shell 1310 is naturally formed on the inner side surface of the end cover 1312 at the position corresponding to the first electrode terminal 1301. For another example, the first electrode terminal 1301 is a recessed structure formed on the outer side surface of the end cover 1312 by stamping, and the derived structure 1304 protruding to the inside of the shell 1310 is naturally formed on the inner side surface of the end cover 1312 at the position corresponding to the first electrode terminal 1301.

[0147] The adapter 1350 is matched with the derived structure 1304 through the support portion 1352 on the side close to the end cover 1312, and the electrical connection between the adapter 1350 and the first electrode terminal 1301 can be achieved. The side of the adapter 1350 away from the end cover 1312 is electrically connected with the electrode assembly 1320, and thus the electrical connection between the first electrode terminal 1301 and the electrode assembly 1320 can be achieved through the adapter 1350. The adapter 1350 can be made of metal with high conductivity, such as aluminum or copper.

[0148] In the case of the derived structure 1304, the end cover 1312 is in a similar "hollow" state at or around the derived structure 1304, and the strength is low, and the first electrode terminal 1301 can be deformed after being pressed.

[0149] By arranging the support portion 1352 on the side of the adapter 1350 close to the end cover 1312, the support portion 1352 is matched with the derived structure 1304. On the one hand, the support portion 1352 can strengthen the end cover 1312 at the derived structure 1304 by supporting the derived structure 1304, and the end cover 1312 is not easily damaged at the first electrode terminal 1301. On the other hand, the adapter 1350 can serve as an electrical connection medium between the electrode assembly 1320 and the first electrode terminal 1301. Through the matching of the support portion 1352 and the derived structure 1304, the electrical current between the electrode assembly 1320 and the first electrode terminal 1301 can flow through the adapter 1350 and the support portion 1352, and the resistance value is relatively small, reducing the probability of damage of the first electrode terminal 1301 due to heating, and prolonging the service life of the battery monomer 1300.

[0150] In some embodiments, the adapter 1350 can only correspond to the derived structure 1304 on the end cover 1312 to be electrically connected with the first electrode terminal 1301 at the derived structure 1304.

[0151] In some other embodiments, the contact area of the adapter 1350 with the end cover 1312 is greater than the contact area of the support portion 1352 with the derived structure 1304.

[0152] In the above structure, the adapter 1350 can be in contact with the end cover 1312 at a position other than the derived structure 1304, so that the contact area of the adapter 1350 with the end cover 1312 is greater than the contact area of the support portion 1352 with the derived structure 1304.

[0153] By using the above scheme, the contact area of the adapter 1350 with the end cover 1312 is larger, which can better support the end cover 1312 and further reduce the contact resistance between the adapter 1350 and the end cover 1312, reduce the energy consumption of the battery monomer 1300, and reduce the heating of the battery monomer 1300.

[0154] Figure 11 A structure schematic diagram of an adapter provided by an embodiment of the present application is shown in FIG. 13. As shown in FIG. 13, in some embodiments, the battery monomer 1300 further comprises an explosion-proof valve 1340; the explosion-proof valve 1340 is arranged on the shell 1310; the adapter 1350 comprises a connecting adapter area 1353 and a weak area 1351, the weak area 1351 is arranged at least partially opposite to the explosion-proof valve 1340, and the weak area 1351 is configured to make the gas on both sides of the adapter 1350 flow through the weak area 1351 when the internal pressure of the battery monomer 1300 exceeds a preset threshold. Figure 10 Figure 11 As shown in FIG. 13, in some embodiments, the battery monomer 1300 further comprises an explosion-proof valve 1340; the explosion-proof valve 1340 is arranged on the shell 1310; the adapter 1350 comprises a connecting adapter area 1353 and a weak area 1351, the weak area 1351 is arranged at least partially opposite to the explosion-proof valve 1340, and the weak area 1351 is configured to make the gas on both sides of the adapter 1350 flow through the weak area 1351 when the internal pressure of the battery monomer 1300 exceeds a preset threshold.

[0155] The adapter area 1353 can be represented as an area on the adapter 1350 other than the support part 1352 and the weak area 1351, and the adapter area 1353 can or can not be in contact with the end cover 1312.

[0156] The explosion-proof valve 1340 is installed on the shell 1310. For example, the explosion-proof valve 1340 can be installed on the end cover 1312 of the shell 1310. Of course, according to the structure and requirements of the battery monomer 1300, the explosion-proof valve 1340 can also be installed on the shell 1311.

[0157] The preset threshold can be the starting air pressure of the explosion-proof valve. When the pressure and temperature in the battery monomer 1300 rise to the preset threshold, the pressure in the battery monomer 1300 can pass through the weak area 1351 to the explosion-proof valve 1340 and break through the explosion-proof valve 1340, so that the explosion-proof valve 1340 is started, the smoke in the battery monomer 1300 is oriented to discharge outward through the explosion-proof valve 1340, preventing the battery monomer 1300 from exploding and other more serious accidents, and reducing the safety risk of the battery monomer 1300.

[0158] In the above process, because the weak area 1351 is arranged on the adapter 1350, the arrangement of the adapter 1350 causes the probability of the delay or failure of the explosion-proof valve 1340 to start to be low. The adapter 1350 supports the end cover 1312 and forms a good electrical connection between the first electrode terminal 1301 and the electrode assembly 1320, without affecting the normal use of the explosion-proof valve 1340.

[0159] ​The weak area 1351 can be in a closed state during normal use of the battery monomer 1300, and when the internal pressure of the battery monomer 1300 exceeds a preset threshold, the weak area 1351 is opened, so that the gas on both sides of the adapter 1350 flows through the weak area 1351; the weak area 1351 can also be in an open state during normal use of the battery monomer 1300, so that the gas on both sides of the adapter 1350 can always flow through the weak area 1351. On this basis, several possible structures of the adapter 1350 are provided in the embodiments of the application:

[0160] Please refer to Figure 11 In some embodiments, the weak area 1351 satisfies at least one of the following conditions:

[0161] (1) The thickness of at least part of the weak area 1351 is less than the thickness of the adapter area 1353.

[0162] (2) A connecting area 1354 is provided between the weak area 1351 and the adapter area 1353, the thickness of the connecting area 1354 is less than the thickness of the weak area 1351 and less than the thickness of the adapter area 1353.

[0163] (3) A perforation is provided at the junction of the weak area 1351 and the adapter area 1353.

[0164] (4) The weak area is configured as a through hole.

[0165] In scheme (1), the weak area 1351 itself has a region with a relatively thin thickness, which has a relatively low strength and is easy to break when the gas pressure in the battery monomer 1300 increases, so that the gas flow can flow through the weak area 1351. For example, the overall thickness of the weak area 1351 can be less than the thickness of the adapter area 1353, or the local thickness can be less than the thickness of the adapter area 1353, which is not limited by the embodiments of the application.

[0166] In scheme (2), the connecting area 1354 has a relatively thin thickness and a relatively low strength, and the connecting area 1354 is easy to break when the gas pressure in the battery monomer 1300 increases, so that the weak area 1351 and the adapter area 1353 are disconnected, and the gas flow can flow through the weak area 1351. For example, the connecting area 1354 can be arranged around the weak area 1351, or the connecting area 1354 can be arranged only around part of the edge of the weak area 1351.

[0167] In scheme (3), the weak zone 1351 is more likely to be torn at the junction with the adapter zone 1353, allowing gas to flow through the weak zone 1351. For example, a notch can be provided at the junction of the weak zone 1351 and the adapter zone 1353, which is configured as a discontinuous line, forming a perforation at the position where the notch is broken. When the gas pressure inside the battery monomer 1300 increases, the adapter 1350 is easily torn from the perforation, allowing the weak zone 1351 to open and the gas flow on both sides of the adapter 1350 to flow through the weak zone 1351.

[0168] In scheme (4), the weak zone 1351 is a through hole itself, thus allowing gas flow on both sides to flow through in any case, so that the explosion-proof valve 1340 can act in time.

[0169] The above structure of the adapter 1350 can meet the condition that when the internal pressure of the battery monomer 1300 exceeds the preset threshold, the gas on both sides of the adapter 1350 flows through the weak zone 1351, providing multiple feasible schemes for realizing the embodiments of the present application.

[0170] Figure 12 A third battery monomer decomposition structure diagram is provided for the embodiments of the present application. As shown in Figure 12 In some embodiments, the shell 1310 is configured as a closed annular cylindrical structure relative to the external environment, and a first hole 1370 is formed in the middle of the annular cylindrical structure, and the electrode assembly 1320 is arranged around the hole wall of the first hole 1370.

[0171] The electrode assembly 1320 can be wound between the hole wall of the first hole 1370 and the outer peripheral wall of the shell 1310.

[0172] The above structure of the battery monomer 1300 allows heat in the middle of the electrode assembly 1320 to be dissipated through the first hole 1370, slowing down the temperature rise speed in the middle of the electrode assembly 1320 and prolonging the service life of the battery monomer 1300.

[0173] Please continue to refer to Figure 12 In some embodiments, the connection hole first hole 1370 is located in the middle of the end cover 1312, and the first electrode terminal 1301 is a "C" type arranged around the first hole 1370.

[0174] In this embodiment, the middle of the "C" type first electrode terminal 1301 naturally forms a space, so that the first hole 1370 can be arranged in the space, and the "C" type first electrode terminal 1301 is discontinuously arranged on one side, so it is a non-rotary structure, which can reduce the probability of relative rotation of the battery monomer 1300 and the external member 1400.

[0175] As shown in Figure 12As shown, in some embodiments, when the first electrode terminal 1301 is a "C" shape arranged around the first hole 1370, an explosion-proof valve 1340 is provided at the opening of the "C" shaped first electrode terminal 1301.

[0176] In this example, the explosion-proof valve 1340 has the same or similar structure and function as the explosion-proof valve 1340 in the aforementioned embodiment, and will not be described again in this embodiment of the application.

[0177] In this embodiment, the naturally formed opening space on one side of the "C"-shaped first electrode terminal 1301 is further utilized to arrange the explosion-proof valve 1340 in the space, making the structural design on the end cap 1312 ingenious and reasonable.

[0178] like Figure 13 As shown, in some embodiments, when the first electrode terminal 1301 is a "C" shape arranged around the first hole 1370, a sampling terminal 1380 is provided in the opening of the "C" shaped first electrode terminal 1301.

[0179] The sampling terminal 1380 can be a temperature sampling terminal, a voltage sampling terminal, or a dual-terminal sampling terminal for both temperature and voltage. Furthermore, it can be an integrated terminal capable of collecting even more parameters. The sampling terminal 1380 is located on the end cover 1312, enabling close-range acquisition of performance and / or environmental parameters of the battery cell 1300. This allows for timely monitoring of the battery cell 1300's status, facilitating protective measures and improving the battery cell 1300's operational safety.

[0180] The above embodiment, by placing the sampling terminal 1380 in the naturally formed opening space on one side of the "C"-shaped first electrode terminal 1301, can make reasonable use of the control, resulting in an ingenious and reasonable structural design on the end cap 1312.

[0181] Secondly, embodiments of this application provide a battery device. Figure 14 This is a structural schematic diagram of multiple battery cells assembled in an embodiment of this application. Figure 15 This is a partially exploded view of a multi-cell assembly structure provided in an embodiment of this application. Figure 16 This is a partially exploded view of another assembly structure of multiple battery cells provided in an embodiment of this application. Please refer to... Figure 2 , Figure 14 , Figure 15 and Figure 16The battery device 1000 includes a plurality of battery cells 1300 in any of the foregoing embodiments, and the plurality of battery cells 1300 are arranged along the axial direction. In two adjacent battery cells 1300 arranged along the axial direction, the first electrode terminal 1301 of one battery cell 1300 is in a form-fitting manner with the first electrode terminal 1301 of the other battery cell 1300, so that the two adjacent battery cells 1300 are electrically connected.

[0182] The plurality of battery cells 1300 arranged along the axial direction can form a battery cell assembly 1200, in which the two adjacent battery cells 1300 are in a form-fitting manner, i.e., the first electrode terminal 1301 of one battery cell 1300 is in a form-fitting manner with the first electrode terminal 1301 of the other battery cell 1300. For example, the two first electrode terminals 1301 in a form-fitting manner can be the positive electrode terminal 1331 of one battery cell 1300 and the negative electrode terminal 1332 of the other battery cell 1300, respectively.

[0183] The form-fitting manner refers to that two components with the same or similar surface shapes are in a surface fitting manner.

[0184] In the structure of the battery device 1000 described above, in the two adjacent battery cells 1300, one battery cell 1300 is an external component 1400 relative to the other battery cell 1300, and in the two first electrode terminals 1301 in a form-fitting manner, one first electrode terminal 1301 is a form-fitting structure 1410 relative to the other first electrode terminal 1301.

[0185] Taking two adjacent battery cells 1300 as an example, the first battery cell and the second battery cell, the positive electrode terminal 1331 of the first battery cell is arranged opposite to the negative electrode terminal 1332 of the second battery cell. Assuming that the positive electrode terminal 1331 of the first battery cell is the first electrode terminal 1301, the second battery cell is an external component 1400 relative to the first battery cell, the negative electrode terminal 1332 of the second battery cell is configured as a form-fitting structure 1410, and the positive electrode terminal 1331 of the first battery cell and the negative electrode terminal 1332 of the second battery cell are in a form-fitting manner, so that the first battery cell and the second battery cell are electrically connected and matched.

[0186] Similarly, taking two adjacent battery monomers 1300 as an example, the first battery monomer and the second battery monomer, the positive electrode terminal 1331 of the first battery monomer is arranged opposite to the negative electrode terminal 1332 of the second battery monomer, assuming that the negative electrode terminal 1332 of the second battery monomer is the first electrode terminal 1301, the first battery monomer is the external component 1400 relative to the second battery monomer, the positive electrode terminal 1331 of the first battery monomer is configured as a profiling structure 1410, and the positive electrode terminal 1331 of the first battery monomer and the negative electrode terminal 1332 of the second battery monomer are matched in the following manner: the negative electrode terminal 1332 of the second battery monomer is profiled with the positive electrode terminal 1331 of the first battery monomer, thereby realizing the electrical connection and cooperation of the first battery monomer and the second battery monomer.

[0187] As can be seen from the above two examples, the external component 1400 is not absolutely defined. When the cooperation structure of the external component 1400 and the adjacent battery monomer 1300 is different, the external component 1400 may act as an external component 1400 of a battery monomer 1300, may provide a first electrode terminal 1301, or may act as an external component 1400 of a battery monomer 1300 and provide a first electrode terminal 1301 to cooperate with another battery monomer 1300.

[0188] In addition, in the above battery device 1000, because the plurality of battery monomers 1300 are arranged along the axis direction, the plurality of battery monomers 1300 can form a linear structure, which is neat in structure, has strong accommodation to the installation space, and is conducive to forming a battery device 1000 with high energy density.

[0189] Through the above structure, among the two adjacent battery monomers 1300 arranged along the axis direction, the first electrode terminal 1301 of one battery monomer 1300 is profiled with the first electrode terminal 1301 of the other battery monomer 1300. Because the first electrode terminal 1301 is a non-rotary structure, the relative rotation of the adjacent battery monomers 1300 can be prevented, the position stability of the battery monomers 1300 is improved, the electrical connection reliability between the electrode terminals 1330 of the adjacent battery monomers 1300 is improved, and the structural stability and current output stability of the battery device 1000 are further improved.

[0190] In a third aspect, the embodiments of the present application also provide another battery device 1000, Figure 17 For another partial exploded view of the battery monomer arrangement structure provided by the embodiments of the present application, please refer to Figure 2 , Figure 14 and Figure 17, the battery device 1000 comprises a plurality of the battery cell 1300 in any of the foregoing embodiments and a conductive pad 1500 configured to electrically connect two adjacent battery cells 1300, the conductive pad 1500 is provided with a profiling structure 1410, and the battery cell 1300 electrically connected to the conductive pad 1500 has a first electrode terminal 1301 matched with the profiling structure 1410 to be electrically connected to the conductive pad 1500.

[0191] In this embodiment, the conductive pad 1500 is configured as the external member 1400, and the conductive pad 1500 refers to a sheet-shaped structure capable of conducting electricity, and the material of the conductive pad 1500 can be metal such as copper, aluminum, etc. Since the conductive pad 1500 is provided with the profiling structure 1410, it can be matched with the first electrode terminal 1301.

[0192] The first electrode terminal 1301 can be the positive electrode terminal 1331 of the battery cell 1300 or the negative electrode terminal 1332 of the battery cell 1300.

[0193] For example, one side of the conductive pad 1500 is the positive electrode terminal 1331 of one battery cell 1300, and the other side is the negative electrode terminal 1332 of another battery cell 1300, the positive electrode terminal 1331 is configured as the first electrode terminal 1301, and the negative electrode terminal 1332 is also configured as the first electrode terminal 1301, the profiling structure 1410 is arranged on both sides of the conductive pad 1500, and matched with the positive electrode terminal 1331 and the negative electrode terminal 1332 respectively through the profiling structure 1410 on both sides, so that the two battery cells 1300 adjacent to the conductive pad 1500 are connected in series.

[0194] In another example, both sides of the conductive pad 1500 are the positive electrode terminals 1331 of one battery cell 1300, and both sides of the conductive pad 1500 are configured as the first electrode terminal 1301, and the profiling structure 1410 is arranged on both sides of the conductive pad 1500, and matched with the two positive electrode terminals 1331 respectively through the profiling structure 1410 on both sides, so that the two battery cells 1300 adjacent to the conductive pad 1500 are connected in parallel.

[0195] In the foregoing embodiments, the matching mode of the conductive pad 1500 with the first electrode terminal 1301 of the battery cell 1300 is that the first electrode terminal 1301 is matched with the profiling structure 1410 on the conductive pad 1500 to be electrically connected, which can reduce the probability of relative rotation between the battery cell 1300 and the conductive pad 1500, improve the position stability of the battery cell 1300, and further improve the electrical connection reliability between the battery cell 1300 and the conductive pad 1500, so that the battery device 1000 has a relatively stable current output.

[0196] In some embodiments, such as Figure 17 As shown, the first electrode terminals 1301 on the two battery cells 1300 adjacent to the conductive pad 1500 protrude outward from the battery cell 1300. The contoured structures 1410 on both sides of the conductive pad 1500 are configured as contoured grooves to cooperate with the first electrode terminals 1301 on both sides respectively.

[0197] In some embodiments, the first electrode terminals 1301 on the two battery cells 1300 adjacent to the conductive pad 1500 are recessed into the battery cell 1300, and the contoured structures 1410 on both sides of the conductive pad 1500 are configured as contoured protrusions to cooperate with the first electrode terminals 1301 on both sides respectively.

[0198] In some embodiments, among the first electrode terminals 1301 on two battery cells 1300 adjacent to the conductive pad 1500, one first electrode terminal 1301 protrudes outward from the battery cell 1300, and the other first electrode terminal 1301 is recessed inward from the battery cell 1300. The contouring structure 1410 of the conductive pad 1500 on the side facing the recessed first electrode terminal 1301 is configured as a contouring protrusion, and the contouring structure 1410 of the conductive pad 1500 on the side facing the protruding first electrode terminal 1301 is configured as a contouring groove, so as to cooperate with the first electrode terminals on both sides respectively.

[0199] Of these, the latter two cases are not shown in the accompanying drawings of this application; however, according to... Figure 17 The mating structure of the conductive pad 1500 and the battery cell 1300 shown should be understood by those skilled in the art to be the latter two mating structures of the conductive pad 1500 and the battery cell 1300.

[0200] In the three embodiments of the battery device 1000 including the conductive pad 1500 provided above, both sides of the conductive pad 1500 can achieve a non-rotational engagement structure with the first electrode terminal 1301, which further enhances the structural stability of the battery cell assembly 1200 and enables the battery device 1000 to have a relatively stable current output.

[0201] Fourthly, embodiments of this application provide an electrical device, including the battery cell 1300 or battery device 1000 in the foregoing embodiments.

[0202] The relevant descriptions of the electrical device and the assembly method of the battery cell 1300 or battery device 1000 in the electrical device have been described in detail in the foregoing embodiments of this application, and will not be repeated in this embodiment.

[0203] By adopting the above scheme, the battery monomer 1300 or the battery device 1000 can provide a relatively stable current supply for the electric device, so that the electric device works stably.

[0204] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell, characterized by: The battery cell is cylindrical, and the battery cell comprises: a shell, the shell comprising an end cap, the end cap being provided with a first electrode terminal, the first electrode terminal being a non-rotational structure, the first electrode terminal being configured to cooperate with a profiled structure on an external member to connect with the external member; an electrode assembly arranged in the shell and electrically connected with the first electrode terminal.

2. The battery cell of claim 1, wherein: The first electrode terminal is configured to protrude outward of the shell.

3. The battery cell of claim 1, wherein: The first electrode terminal is configured to be recessed inward of the shell.

4. The battery cell of claim 1, wherein: The shell comprises two oppositely arranged end caps, each of the end caps being provided with a first electrode terminal, one of the first electrode terminals being configured to protrude outward of the shell, and the other of the first electrode terminals being configured to be recessed inward of the shell.

5. The battery cell of claim 1, wherein: The first electrode terminal is provided with a first positioning structure, the first positioning structure being configured to cooperate with a second positioning structure on the external member.

6. The battery cell of claim 5, wherein: The first positioning structure comprises a positioning groove arranged on the first electrode terminal. The first positioning structure comprises a positioning protrusion arranged on the first electrode terminal.

7. The battery cell of claim 1, wherein: The first electrode terminal has a projection area a along an axis direction of the battery cell, and the battery cell has a projection area A along an axis direction of the battery cell, and a / A≥50%.

8. The battery cell of claim 1, wherein: The end cap is provided with a derivative structure on an inner side of the shell, the derivative structure being located corresponding to the first electrode terminal, the derivative structure being configured to be recessed outward of the shell when the first electrode terminal is configured to protrude outward of the shell. The derivative structure is configured to protrude inward of the shell when the first electrode terminal is configured to be recessed inward of the shell. The battery cell further comprises an adapter arranged in the shell, the adapter being provided with a support portion corresponding to the derivative structure on a side close to the end cap, and the adapter being electrically connected with the electrode assembly on a side away from the end cap.

9. The battery cell of claim 8, wherein: The contact area between the adapter and the end cap is greater than the contact area between the support portion and the derivative structure.

10. The battery cell of claim 9, wherein: The battery cell further comprises: an explosion-proof valve arranged on the end cap; The adapter comprises an adapter region and a weak region connected with each other, the weak region being at least partially arranged opposite to the explosion-proof valve, the weak region being configured to allow gas on both sides of the adapter to flow through the weak region when the internal pressure of the battery cell exceeds a preset threshold.

11. The battery cell of claim 10, wherein: The weak region satisfies at least one of the following conditions: (1) The thickness of the weak region at least partially is less than the thickness of the adapter region; (2) A connecting region is arranged between the weak region and the adapter region, the thickness of the connecting region being less than the thickness of the weak region and less than the thickness of the adapter region; (3) A perforation is arranged at the junction between the weak region and the adapter region; (4) The weak region is configured as a through hole.

12. The battery cell of any one of claims 1-11, wherein: The shell is configured as a closed annular cylindrical structure relative to the external environment, a first hole is formed in the middle of the annular cylindrical structure, and the electrode assembly is arranged around the hole wall of the first hole.

13. A battery device characterized by comprising: The battery device comprises a plurality of battery cells as claimed in any one of claims 1-12, and the plurality of battery cells are arranged along the axial direction thereof. In two adjacent battery cells arranged along the axial direction, the first electrode terminal of one battery cell is in a mating fit with the first electrode terminal of the other battery cell, so as to electrically connect the two adjacent battery cells.

14. A battery device characterized by comprising: The battery device comprises a plurality of battery cells as claimed in any one of claims 1-12. The battery device further comprises an electrically conductive pad configured to electrically connect two adjacent battery cells, the electrically conductive pad is provided with the profiled structure, and the battery cell electrically connected to the electrically conductive pad is provided with the first electrode terminal in a mating fit with the profiled structure to be electrically connected to the electrically conductive pad.

15. The battery device of claim 14, wherein, The first electrode terminal on each of the two adjacent battery cells adjacent to the electrically conductive pad is protrudingly arranged outside the battery cell. The profiled structure on each side of the electrically conductive pad is configured as a profiled groove to be in a mating fit with the first electrode terminal on the side.

16. The battery device of claim 14, wherein, The first electrode terminal on each of the two adjacent battery cells adjacent to the electrically conductive pad is recessively arranged inside the battery cell. The profiled structure on each side of the electrically conductive pad is configured as a profiled protrusion to be in a mating fit with the first electrode terminal on the side.

17. The battery device of claim 14, wherein, The first electrode terminal on each of the two adjacent battery cells adjacent to the electrically conductive pad is protrudingly arranged outside the battery cell. The profiled structure on each side of the electrically conductive pad is configured as a profiled protrusion to be in a mating fit with the first electrode terminal on the side.

18. An electrical device, comprising: The first electrode terminal on each of the two adjacent battery cells adjacent to the electrically conductive pad is protrudingly arranged outside the battery cell. The profiled structure on each side of the electrically conductive pad is configured as a profiled protrusion to be in a mating fit with the first electrode terminal on the side. The battery device comprises a plurality of battery cells as claimed in any one of claims 1-12, or a battery device as claimed in any one of claims 13-17.

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