Battery monomer, cover plate assembly, battery device and power utilization device

Abstract

The embodiment of the utility model provides a battery monomer, a cover plate assembly, a battery device and a power utilization device, and belongs to the technical field of batteries. The battery monomer comprises a shell, an electrode assembly and an electrode terminal, the electrode assembly is mounted in the shell and comprises a tab; the electrode terminal is arranged on the shell and comprises a main body part, an extending part and a reinforcing part, the main body part is connected with the tab, the extending part is connected with the main body part, and at least part of the reinforcing part is arranged on the side, facing the shell, of the extending part. According to the battery monomer, the deformation risk of the extension part can be reduced, so that the bending strength and the shearing strength of the extension part are improved, the risk of deformation or breakage of the extension part of the electrode terminal when bearing external pressure or vibration is reduced, and the overall reliability and safety of the battery monomer are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery monomer, a cover plate assembly, a battery device and a power utilization device. BACKGROUND

[0002] The battery monomer includes an electrode terminal and an electrode assembly, the electrode terminal is used to be connected with a tab of the electrode assembly, in the related art, the electrode terminal is easy to be deformed or broken when bearing external pressure or vibration, which leads to poor reliability of the battery monomer, and needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery monomer, a cover plate assembly, a battery device and a power utilization device, so as to reduce the risk of deformation or breakage of the electrode terminal when bearing external pressure or vibration, and improve the overall reliability and safety of the battery monomer.

[0004] In a first aspect, an embodiment of the present application provides a battery monomer, comprising:

[0005] A shell comprising a wall portion;

[0006] An electrode assembly installed in the shell, the electrode assembly comprising a tab;

[0007] An electrode terminal arranged in the shell, the electrode terminal comprising a main body portion, an extension portion and a reinforcing portion, the main body portion being electrically connected to the tab, the extension portion protruding from the main body portion along a first direction, the first direction being perpendicular to the thickness direction of the wall portion, the extension portion being connected to the main body portion and electrically connected to a busbar, and the reinforcing portion being arranged at least partially on one side of the extension portion facing the wall portion.

[0008] In the above technical solution, by arranging the reinforcing portion on the inner side of the extension portion, the risk of deformation of the extension portion can be reduced, so as to improve the bending strength and shear strength of the extension portion, thereby reducing the risk of deformation or breakage of the extension portion of the electrode terminal when bearing external pressure or vibration, and improving the overall reliability and safety of the battery monomer.

[0009] In some embodiments, the two electrode terminals comprise a first electrode terminal and a second electrode terminal arranged in an insulating manner, the main body portion, the extension portion and the reinforcing portion of the first electrode terminal are respectively a first main body portion, a first extension portion and a first reinforcing portion, the main body portion, the extension portion and the reinforcing portion of the second electrode terminal are respectively a second main body portion, a second extension portion and a second reinforcing portion, the first main body portion and the second main body portion are arranged along a first direction, the first extension portion and the second extension portion are arranged along a second direction, the first direction is perpendicular to the second direction, the first reinforcing portion is arranged between the first extension portion and the wall portion, and the second reinforcing portion is arranged between the second extension portion and the wall portion.

[0010] In some embodiments, the first electrode terminal further comprises a first protrusion extending at least partially to a side of the second extension part away from the housing, the second reinforcement part at least partially coincides with a projection of the first protrusion along a third direction, the third direction being perpendicular to each of the first direction and the second direction; and / or,

[0011] the second electrode terminal further comprises a second protrusion extending at least partially to a side of the first extension part away from the housing, the first reinforcement part at least partially coincides with a projection of the second protrusion along the third direction, the third direction being perpendicular to each of the first direction and the second direction.

[0012] In some embodiments, a side of the first main part facing the second extension part is connected with the first protrusion, and a side of the second main part facing the first extension part is connected with the second protrusion.

[0013] In some embodiments, the battery cell further comprises an insulating member at least partially arranged between each of the first electrode terminal, the second electrode terminal and the housing.

[0014] In some embodiments, the insulating member is at least partially arranged in the housing.

[0015] In some embodiments, the insulating member comprises:

[0016] an insulating plate, the first electrode terminal and the second electrode terminal are spaced apart and mounted on the insulating plate, and the insulating plate is at least partially arranged between the first reinforcement part and the housing and between the second reinforcement part and the housing;

[0017] a spacer connected with the insulating plate and arranged between the first electrode terminal and the second electrode terminal.

[0018] In some embodiments, the spacer comprises a first segment, a second segment and a third segment connected in sequence, the first segment is located between the first main part and the second extension part, the second segment is located between the first extension part and the second extension part, and the third segment is located between the first extension part and the second main part.

[0019] In some embodiments, a projection of the first protrusion, the first segment and the second extension part along a third direction at least partially coincides, and a part of the first segment is clamped between the first protrusion and the second extension part;

[0020] The first extension, the third segment, and the second protrusion are at least partially coincident in a projection along a third direction, and a portion of the third segment is clamped between the first extension and the second protrusion.

[0021] In some embodiments, a length of the first protrusion along the second direction is less than a length of the first segment along the second direction, and a length of the second protrusion along the second direction is less than a length of the third segment along the second direction.

[0022] In some embodiments, the spacer comprises a first spacer portion and a second spacer portion distributed along a third direction, a height of the first spacer portion along the third direction is not greater than the first electrode terminal and the second electrode terminal, and a height of the second spacer portion along the third direction is greater than the first electrode terminal and the second electrode terminal.

[0023] In some embodiments, the second segment of the second spacer portion has at least one positioning portion configured to cooperate with a busbar.

[0024] In some embodiments, the second segment of the first spacer portion has at least one first limiting portion configured to cooperate with the first extension and the second extension to limit a degree of freedom of the first extension and the second extension along a third direction.

[0025] In some embodiments, the battery cell further comprises a fixing member at least partially disposed on a side of the first electrode terminal and the second electrode terminal away from the shell, and the fixing member is connected to the shell.

[0026] In some embodiments, the battery cell comprises an insulating member at least partially disposed between the electrode terminal and the fixing member.

[0027] In some embodiments, the insulating member is at least partially disposed on an outer periphery of the fixing member.

[0028] In some embodiments, the first electrode terminal further comprises a first adapter member connected to the first main portion and the tab, respectively, and a projection of the first reinforcing portion along a third direction is at least partially coincident with a projection of the first adapter member along the third direction, the third direction being perpendicular to the first direction and the second direction; and the second electrode terminal further comprises a second adapter member connected to the second main portion and the tab, respectively, and a projection of the second reinforcing portion along the third direction is at least partially coincident with a projection of the second adapter member along the third direction, the third direction being perpendicular to the first direction and the second direction.

[0029] In some embodiments, the first adapter includes a first connecting portion and a first body, the first body is disposed in the shell and connected with the tab, and the first connecting portion is at least partially disposed in the shell and connects the first body portion and the first body.

[0030] The second adapter includes a second connecting portion and a second body, the second body is disposed in the shell and connected with the tab, and the second connecting portion is at least partially disposed in the shell and connects the second body portion and the second body.

[0031] In some embodiments, the battery cell further includes an insulating sealing ring, the insulating sealing ring is respectively sleeved outside the first connecting portion and the second connecting portion.

[0032] In some embodiments, the reinforcing portion at least partially extends to a side of the body portion facing the shell.

[0033] In some embodiments, the extending portion is formed with a mounting groove on a side facing the shell, and the reinforcing portion is at least partially disposed in the mounting groove.

[0034] In some embodiments, the thickness W of the reinforcing portion satisfies: 0.1mm≤W≤1mm.

[0035] In some embodiments, the reinforcing portion is thermally compounded with the extending portion; or, the reinforcing portion is disposed between the extending portion and the shell.

[0036] In some embodiments, the electrode terminal is a positive electrode terminal, the reinforcing portion is a copper layer, and the strength of the reinforcing portion is greater than that of the extending portion.

[0037] In a second aspect, the embodiments of the present application provide a cover plate assembly, which is applied to a battery device, and an electrode terminal of a battery cell is disposed in the cover plate assembly.

[0038] In a third aspect, the embodiments of the present application provide a battery device, which includes a plurality of battery cells according to any one of the above embodiments.

[0039] In some embodiments, the battery device further includes a busbar, the busbar is electrically connected with the extending portion of the corresponding battery cell.

[0040] In a fourth aspect, the embodiments of the present application provide an energy storage device, which includes a plurality of battery cells according to any one of the above embodiments or a plurality of battery devices according to any one of the above embodiments, and the battery cells or the battery devices are used for storing or providing electric energy.

[0041] In a fifth aspect, the embodiments of the present application provide an energy storage system, comprising: a power conversion device and the energy storage device according to any one of the preceding embodiments, wherein the power conversion device is configured to electrically connect a power generation device and the energy storage device.

[0042] In a sixth aspect, the embodiments of the present application provide a power consumption device, comprising: the battery cell according to any one of the preceding embodiments, the battery device according to any one of the preceding embodiments, the energy storage device according to any one of the preceding embodiments, or the energy storage system according to any one of the preceding embodiments, wherein the battery cell or the battery device is configured to store or provide electric energy.

[0043] In a seventh aspect, the embodiments of the present application provide a charging network, comprising: a charging pile and the energy storage device according to any one of the preceding embodiments or the energy storage system according to any one of the preceding embodiments, wherein the energy storage device is configured to provide electric energy for the charging pile. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0045] Figure 1 A structural schematic diagram of an energy storage system provided by some embodiments of the present application is shown in the following figure:

[0046] Figure 2 A structural schematic diagram of a charging network provided by some embodiments of the present application is shown in the following figure:

[0047] Figure 3 A structural schematic diagram of a vehicle provided by some embodiments of the present application is shown in the following figure:

[0048] Figure 4 An exploded view of a battery device provided by some embodiments of the present application is shown in the following figure:

[0049] Figure 5 A structural schematic diagram of a battery cell provided by some embodiments of the present application is shown in the following figure:

[0050] Figure 6 A structural schematic diagram of a battery cell provided by some embodiments of the present application is shown in the following figure:

[0051] Figure 7 A structural schematic diagram of a battery cell provided by some embodiments of the present application is shown in the following figure:

[0052] Figure 8 A structural schematic diagram of a battery cell provided by some embodiments of the present application is shown in the following figure:

[0053] Figure 9 Fifth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0054] Figure 10 Sixth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0055] Figure 11 Seventh structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0056] Figure 12 Eighth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0057] Figure 13 Ninth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0058] Figure 14 Tenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0059] Figure 15 Eleventh structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0060] Figure 16 Twelfth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0061] Figure 17 Thirteenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0062] Figure 18 Fourteenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0063] Figure 19 Fifteenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0064] Figure 20 Sixteenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0065] Figure 21 Seventeenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0066] Figure 22 Eighteenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0067] Figure 23 Nineteenth structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0068] Figure 24 Fig. 20 is a structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0069] Figure 25 Fig. 21 is a structural schematic diagram of a battery cell provided for some embodiments of the present application.

[0070] Reference signs:

[0071] Energy storage device 1, power conversion device 2, power generation device 3, charging pile 4, connector 5;

[0072] Vehicle 1000;

[0073] Battery device 100;

[0074] Box 10, first box body 11, second box body 12;

[0075] Battery cell 20, shell 21, electrode assembly 22, tab 221;

[0076] First electrode terminal 23, first main body part 231, first protruding part 2311, first extending part 232, first adapter 233, first reinforcing part 234, mounting groove 235;

[0077] Second electrode terminal 24, second main body part 241, second extending part 242, second protruding part 2421, second adapter 243, second connecting part 2431, second body 2432, second reinforcing part 245;

[0078] Reinforcing part;

[0079] Insulating member 26, insulating plate 261, spacer 262, first section 2621, first groove 26211, second groove 26212, second section 2622, third section 2623, first spacing part 2624, first limiting part 26241, second limiting part 26242, second spacing part 2625, positioning part 26251, frame 263, first accommodating cavity 264, second accommodating cavity 265, first avoiding hole 266, second avoiding hole 267;

[0080] Fixing member 27, flange 271, air vent hole 272;

[0081] Insulating sealing ring 28;

[0082] Cover plate assembly 29, cover plate body 291;

[0083] Controller 200; motor 300. DETAILED DESCRIPTION

[0084] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0085] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0086] In the present application, the phrase "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0087] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0088] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0089] In the present application, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0090] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0091] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0092] The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, and the embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the embodiments of the present application are not limited thereto.

[0093] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, the positive current collector includes a positive current collector body and a positive tab, and the positive active material layer is coated on the surface of the positive current collector body. The positive tab is not coated with the positive active material layer and protrudes from the positive current collector body. Taking a lithium ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative current collector includes a negative current collector body and a negative tab, and the negative active material layer is coated on the surface of the negative current collector body. The negative tab is not coated with the negative active material layer and protrudes from the negative current collector body. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. In order to ensure that no fuse occurs when passing a large current, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together.

[0094] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0095] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The battery cell is used to store or provide electric energy.

[0096] The battery cell includes an electrode terminal and an electrode assembly, the electrode terminal is used to connect with the tab of the electrode assembly, in the related art, the electrode terminal is easy to deform or break when bearing external pressure or vibration, resulting in poor reliability of the battery cell, which needs to be improved.

[0097] Based on the above considerations, in order to improve the strength of the electrode terminal, the inventor has designed a battery cell, which includes a shell, an electrode assembly and an electrode terminal; the shell includes a wall part; the electrode assembly is installed in the shell, and the electrode assembly includes a tab; the electrode terminal is arranged in the shell, and the electrode terminal includes a main body part, an extension part and a reinforcing part, the main body part is electrically connected to the tab, the extension part protrudes from the main body part along a first direction, the first direction is perpendicular to the thickness direction of the wall part, the extension part is connected to the main body part and is electrically connected to the busbar, and the reinforcing part is arranged on one side of the extension part facing the wall part.

[0098] In the battery cell with the above structure, by arranging the reinforcing part on the inner side of the extension part, the risk of deformation of the extension part can be reduced, the bending strength and shear strength of the extension part are improved, the risk of deformation or breakage of the extension part of the electrode terminal when bearing external pressure or vibration is reduced, and the overall reliability and safety of the battery cell are improved.

[0099] 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 mixed connection through a busbar.

[0100] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0101] As an example, the battery cell assembly can be a battery module, which is 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.

[0102] In some embodiments, the battery apparatus can be a battery pack, which includes a box and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box.

[0103] 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.

[0104] 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.

[0105] As an example, the box can include a first box and a second box. The first box and the second box are fastened so that an inside of the box forms a closed space to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0106] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively so that an inside of the box forms a closed space to accommodate the battery monomer assembly.

[0107] In some embodiments, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0108] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles and spaceships, etc. The battery device is used to store or provide electric energy.

[0109] The embodiments of the present application provide a storage device, which includes one or more battery clusters to improve the voltage and capacity of the storage device. The battery cluster can include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to improve the voltage of the storage device. When the storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the storage device.

[0110] The storage device can be used in a storage power station, a wind power system, a solar power system, a mobile power system or a temporary power supply system, etc. The storage device can store electric energy as needed and output electric energy at an appropriate time. For example, the storage device can store electric energy at a low electricity consumption valley, and provide electric energy for related users or electric devices at a high electricity consumption peak. The storage system provided by the embodiments of the present application can be any power system that needs to use the storage device.

[0111] In some embodiments, the storage device is a storage container or a storage cabinet.

[0112] In some embodiments, the storage device can include a cabinet and one or more battery clusters, and the battery cluster is contained in the cabinet.

[0113] In some embodiments, the storage device can include a thermal management module, a master control module, a general control module, a power distribution module and a fire-fighting module, etc.

[0114] As an example, the thermal management module can include a liquid cooling unit, which provides cooling liquid to each battery device through a pipeline for adjusting the temperature of the battery cell.

[0115] As an example, the master module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master module can monitor the current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current, voltage, etc. of the battery cluster can be controlled. The master module includes a slave battery management unit SBMU (SBMU), a fusion switch, and other modules.

[0116] As an example, the master module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master module can monitor the current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current, voltage, etc. of the battery cluster can be controlled. The master module includes a slave battery management unit SBMU (SBMU), a fusion switch, and other modules.

[0117] As an example, the fire control system includes a control panel, a detector, an alarm device, etc. for detecting, alarming, or extinguishing the energy storage system.

[0118] As an example, the power distribution device can be used to distribute power to the energy storage device power module.

[0119] The technical solutions described in the embodiments of the present application are applicable to various power consumption devices using energy storage devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft. The energy storage device is used to store or provide electrical energy.

[0120] In some embodiments, as shown in Figure 1 The energy storage system can include one or more energy storage devices 1 and a power conversion device 2 (PCS) connected between a power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power conversion device 2. As an example, the power generation device 3 can be a solar panel, a water power generation device, a fire power generation device, a wind power generation device, etc. The specific type of power generation device 3 is not limited in the present application.

[0121] The technical solutions described in the embodiments of the present application are applicable to various electric devices using energy storage systems, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft including airplanes, rockets, space shuttles and spaceships. The energy storage device is used to store or provide electric energy.

[0122] Please refer to Figure 2 The embodiments of the present application provide a charging network, including a charging pile 4 and an energy storage device 1, the charging pile 4 is electrically connected with the energy storage device 1, and the energy storage device 1 is used to provide electric energy for the charging pile 4. The charging pile 4 and the battery device in the energy storage device 1 are electrically connected through a cable, and the battery device can provide the stored electric energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect with electric devices (such as vehicles), so as to supply energy to the electric devices.

[0123] The energy storage device can be located inside the charging pile (such as a charging and storage integrated machine), or outside the charging pile.

[0124] The embodiments of the present application provide an electric device using a battery monomer or a battery device or an energy storage device or an energy storage system as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship and a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0125] The following embodiments are described for convenience with a vehicle 1000 as an example of an electric device of an embodiment of the present application.

[0126] Please refer to Figure 3 , Figure 3 The structure schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 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 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as the operating power supply of the vehicle. The vehicle can also include a controller 200 and a motor 300, the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle during starting, navigation and driving.

[0127] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle, but also serve as the driving power source of the vehicle, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle.

[0128] Please refer to Figure 4 , Figure 4 The structural explosion diagram of the battery device 100 provided in some embodiments of the present application is shown. The battery device 100 includes a box body 10 and a plurality of battery monomers 20, and the battery monomers 20 are arranged in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery monomers 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 are overlapped with each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery monomers 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-shaped structure, and the first box body 11 is overlapped with the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 is overlapped with the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0129] In the battery device 100, the plurality of battery monomers 20 can be connected in series, in parallel, or in a mixed manner, and the mixed manner means that some of the plurality of battery monomers 20 are connected in series and some are connected in parallel. The plurality of battery monomers 20 can be directly connected in series, in parallel, or in a mixed manner, and then the plurality of battery monomers 20 are accommodated in the box body 10 as a whole; of course, the battery device 100 can also be that the plurality of battery monomers 20 are first connected in series, in parallel, or in a mixed manner to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a whole, and then accommodated in the box body 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the plurality of battery monomers 20.

[0130] Please refer to Figure 4 , Figure 4 The partial structural schematic diagram of the battery device 100 provided in some embodiments of the present application is shown. The battery device 100 includes a plurality of rows of battery monomers 20, and the plurality of rows of battery monomers 20 are arranged along a first direction, and each row of battery monomers 20 includes a plurality of battery monomers 20 arranged along a second direction. The first direction and the second direction are the length direction of the box body 10 and the width direction of the box body 10, respectively, and the first direction and the second direction are perpendicular to each other.

[0131] According to some embodiments of the present application, as Figures 5-25As shown, the present application provides a battery cell 20, comprising: a housing 21, an electrode terminal and an electrode assembly 22.

[0132] As shown, the electrode assembly 22 is installed in the housing 21, and the electrode assembly 22 comprises a tab 221, the tab 221 comprising a positive electrode tab and a negative electrode tab. Figure 5 Figure 16 As shown, the electrode assembly 22 is installed in the housing 21, and the electrode assembly 22 comprises a tab 221, the tab 221 comprising a positive electrode tab and a negative electrode tab.

[0133] As shown, the electrode terminal comprises a first electrode terminal 23 and a second electrode terminal 24, the first electrode terminal 23 being connected to the corresponding tab 221, and the second electrode terminal 24 being connected to the corresponding tab 221. Figure 6 Figure 17 As shown, the electrode terminal comprises a first electrode terminal 23 and a second electrode terminal 24, the first electrode terminal 23 being connected to the corresponding tab 221, and the second electrode terminal 24 being connected to the corresponding tab 221.

[0134] As shown, the housing 21 comprises a cover plate assembly 29 and a housing, the housing and the cover plate assembly 29 forming a receiving cavity for accommodating the electrode assembly 22. Figure 7 Figure 18 As shown, the housing 21 comprises a cover plate assembly 29 and a housing, the housing and the cover plate assembly 29 forming a receiving cavity for accommodating the electrode assembly 22.

[0135] The housing comprises a wall portion, which can be any side wall of the housing, and the wall portion can be the top wall of the housing.

[0136] The electrode terminal is used to connect the tab 221 of the electrode assembly 22 and the busbar between the battery cells 20, and the electrode terminal is insulatedly connected to the housing 21, and the electrode terminal comprises a main body portion, an extension portion and a reinforcing portion.

[0137] The main body portion is electrically connected to the tab 221 of the electrode assembly 22, and the main body portion is used to connect the tab 221 of the electrode assembly 22, and the main body portion can be connected to the tab 221 by welding or the like.

[0138] The extension portion protrudes from the main body portion along a first direction, and the first direction is perpendicular to the thickness direction of the wall portion. The extension portion is connected to the main body portion, and the extension portion and the main body portion can be connected by integral molding or welding or the like.

[0139] The extension portion is electrically connected to the busbar.

[0140] The extension portion extends outwardly from the main body portion, and the extension portion extends along the first direction to increase the connection area of the electrode terminal and the busbar, and to increase the reliability of the electrical connection.

[0141] The extension portion can be provided in a flat shape, i.e. the extension portion is provided in a structure with a large length-width ratio, so as to be connected to the busbar, and the busbar is a conductive connecting piece between different battery cells 20. The extension length of the extension portion can be set according to the layout requirements of the battery cell 20 in the battery device 100.

[0142] ​​​In some embodiments, the surface of the extension part is provided with a tin plating layer to improve its oxidation resistance and electrical conductivity.

[0143] At least part of the reinforcing part is arranged on the side of the extension part facing the shell 21 to reduce the risk of deformation and warping of the extension part.

[0144] In some embodiments, at least part of the reinforcing part extends to the side of the main body part facing the shell 21 to reinforce the main body part, reduce the risk of deformation of the main body part, and reduce the difficulty of assembly and processing.

[0145] The arrangement position of the reinforcing part at least includes the following two kinds:

[0146] First, the reinforcing part is arranged on the inner side of the extension part and also on the inner side of the main body part.

[0147] In this embodiment, the inner side of the main body part and the inner side of the extension part are both provided with a reinforcing part, which can reduce the risk of deformation of the main body part and the extension part, and improve the bending strength and shear strength of the main body part and the extension part.

[0148] The main body part and the extension part are at the same height, and the reinforcing part is located between the surface where the main body part and the extension part are located and the surface where the shell 21 is located.

[0149] For example, the reinforcing part can be connected to the inner side of the main body part and the extension part by gluing, welding or thermal compounding, or can be stacked by contact lamination and the like.

[0150] In some embodiments, the reinforcing part is thermally compounded with the extension part, or the reinforcing part is arranged between the extension part and the shell.

[0151] Second, the reinforcing part is arranged on the inner side of the extension part, and the inner side of the extension part is the side of the extension part facing the shell 21.

[0152] The reinforcing part is located on the inner side of the extension part, i.e. the reinforcing part is arranged in the region between the extension part and the shell 21.

[0153] For example, the reinforcing part can be connected to the inner side of the extension part by gluing, welding or thermal compounding, or can be stacked by contact lamination and the like.

[0154] In this embodiment, the presence of the reinforcing part makes the extension part of the electrode terminal less likely to deform or break when subjected to external pressure or vibration, thereby reducing the risk of deformation of the extension part due to its large length-width ratio and weak structural strength, and improving the overall reliability and safety of the battery monomer 20.

[0155] The reinforcing portion is located between the extension portion and the shell 21, the extending direction of the reinforcing portion is consistent with the extension portion, and the width of the reinforcing portion is not greater than the width of the extension portion, so as to facilitate the assembly of the extension portion and the reinforcing portion with the shell 21.

[0156] In some embodiments, the strength of the reinforcing portion is greater than the strength of the extension portion, that is, the strength of the reinforcing portion is greater than the strength of the extension portion, and the reinforcing portion is arranged on the inner side of the extension portion, which can reduce the risk of deformation of the extension portion and improve the bending strength and shear strength of the extension portion.

[0157] In the embodiment, the reinforcing portion can be made of a material with a strength greater than the strength of the material of the extension portion and the main body portion.

[0158] For example, the main body portion and the extension portion can be aluminum parts, and the reinforcing portion can be made of a material with a strength greater than aluminum, for example, the reinforcing portion can be made of a copper part or a steel part.

[0159] For example, the main body portion and the extension portion of the negative electrode terminal can be composed of an upper layer of aluminum and a lower layer of copper, and the reinforcing portion can be made of a steel material with a strength greater than aluminum or copper; or the main body portion and the extension portion of the positive electrode terminal can be aluminum parts, and the reinforcing portion can be a copper layer or a steel layer.

[0160] In some embodiments, as shown in Figure 13 The extension portion is provided with a mounting groove 235 on the side facing the shell 21, and at least part of the reinforcing portion is arranged in the mounting groove 235.

[0161] The reinforcing portion is embedded in the mounting groove 235, which can reduce the influence of the reinforcing portion on the thickness of the electrode terminal in the third direction, and can reduce the risk of deformation and warping of the electrode terminal.

[0162] In some embodiments, the thickness W of the reinforcing portion satisfies: 0.1mm≤W≤1mm, preferably 0.2mm≤W≤0.5mm.

[0163] For example, W can be 0.3mm, 0.4mm or 0.5mm.

[0164] In the embodiment, by limiting the thickness W of the reinforcing portion, the influence of the height of the battery monomer 20 can be reduced, and the assembly difficulty can be reduced.

[0165] In the related art, the extension portion has weak structural strength due to the large aspect ratio, and has risks of deformation and fracture, which is not conducive to the stability of the battery monomer 20.

[0166] According to the battery monomer 20 provided in the present application, by arranging the reinforcing part on the inner side of the extension part, the bending strength and the shearing strength of the extension part can be improved, so as to reduce the risk of deformation of the extension part, thereby reducing the risk of deformation or fracture of the extension part of the electrode terminal when bearing external pressure or vibration, and improving the overall reliability and safety of the battery monomer 20.

[0167] As shown in Figure 8 and Figure 19 According to some embodiments of the present application, the battery monomer 20 of the present application is a same-side electrode terminal output battery monomer 20, and the electrode terminal includes the first electrode terminal 23 and the second electrode terminal 24 arranged in an insulating manner, one of the first electrode terminal 23 and the second electrode terminal 24 is a positive electrode, and the other of the first electrode terminal 23 and the second electrode terminal 24 is a negative electrode.

[0168] As shown in Figure 9 and Figure 21 The main body part, the extension part and the reinforcing part of the first electrode terminal 23 are respectively the first main body part 231, the first extension part 232 and the first reinforcing part 234, and the main body part, the extension part and the reinforcing part of the second electrode terminal 24 are respectively the second main body part 241, the second extension part 242 and the second reinforcing part 245.

[0169] The main body part of the first electrode terminal 23 is the first main body part 231, the extension part of the first electrode terminal 23 is the first extension part 232, and the reinforcing part of the first electrode terminal 23 is the first reinforcing part 234; the main body part of the second electrode terminal 24 is the second main body part 241, the extension part of the second electrode terminal 24 is the second extension part 242, and the reinforcing part of the second electrode terminal 24 is the second reinforcing part 245.

[0170] The first main body part 231 and the second main body part 241 are arranged along a first direction, the first extension part 232 and the second extension part 242 are arranged along a second direction perpendicular to the first direction, the first reinforcing part 234 is arranged between the first extension part 232 and the shell 21, and the second reinforcing part 245 is arranged between the second extension part 242 and the shell 21.

[0171] Among them, the first direction and the second direction are perpendicular, one of the first direction and the second direction is the length direction of the battery monomer 20, and the other of the first direction and the second direction is the width direction of the battery monomer 20.

[0172] For example, in the present embodiment, the first direction can be the length direction of the battery monomer 20, and the second direction can be the width direction of the battery monomer 20, so as to lengthen the length of the first extension part 232 and the second extension part 242, thereby increasing the connection area of the electrode terminal and the busbar and increasing the reliability of the electrical connection.

[0173] In the embodiment, the first electrode terminal 23 and the second electrode terminal 24 form an intermeshing engagement arrangement, which can increase the effective area of the first extension 232 and the second extension 242, and make the first electrode terminal 23 and the second electrode terminal 24 more compact in structure.

[0174] According to some embodiments of the present application, the central axis of the first extension 232 extending along the first direction is arranged to be offset from the central axis of the first main body 231 extending along the first direction, and the central axis of the second extension 242 extending along the first direction is arranged to be offset from the central axis of the second main body 241 extending along the first direction.

[0175] The shapes of the first main body 231 and the second main body 241 can be determined according to the installation position.

[0176] As shown in the examples, Figure 9 and Figure 21 the ends of the first main body 231 and the second main body 241 facing away from each other can be circular arcs or rectangles.

[0177] The first extension 232 is located at one end of the first main body 231 along the first direction and protrudes from the first main body 231 along the first direction, and the second extension 242 is located at one end of the second main body 241 along the first direction and protrudes from the second main body 241 along the first direction.

[0178] In the embodiment, the first electrode terminal 23 and the second electrode terminal 24 can have the same structure, and the first electrode terminal 23 and the second electrode terminal 24 are arranged to be centrally symmetric, the end of the second extension 242 facing away from the second main body 241 is close to the first main body 231, the end of the first extension 232 facing away from the first main body 231 is close to the second main body 241, and the second extension 242 and the first extension 232 are close to each other along one side in the second direction, so that the layout structure of the first electrode terminal 23 and the second electrode terminal 24 is more compact.

[0179] According to some embodiments of the present application, as shown in Figure 15 the projection of the first electrode terminal 23 and the second electrode terminal 24 along the third direction at least partially overlaps, the third direction is perpendicular to the first direction and the second direction, and the third direction can be the height direction of the battery monomer 20.

[0180] The side of the first electrode terminal 23 and the second electrode terminal 24 close to each other can be projected to coincide along the third direction,

[0181] Exemplarily, the first electrode terminal 23 further comprises a first protruding portion 2311 extending at least partially to a side of the second extending portion 242 away from the shell 21, the second reinforcing portion 245 and the first protruding portion 2311 at least partially coincide in projection along a third direction, the third direction is perpendicular to the first direction and the second direction, the first protruding portion 2311 is pressed above the second extending portion 242 and the second reinforcing portion 245 along the third direction, which can achieve an interlocking effect, thereby fixing the second extending portion 242 and the second reinforcing portion 245, and reducing the risk of warping deformation of the second extending portion 242 and the second reinforcing portion 245.

[0182] In some embodiments, a side of the first main body portion 231 facing the second extending portion 242 is connected with the first protruding portion, and a side of the second main body portion 241 facing the first extending portion 232 is connected with the second protruding portion.

[0183] In the present embodiment, the first protruding portion is used to lock the end of the second extending portion 242 away from the second main body portion 241, which can fix the weak end of the second extending portion 242 and further reduce the risk of warping deformation of the second extending portion 242 and the second reinforcing portion 245; and the second protruding portion is used to lock the end of the first extending portion 232 away from the first main body portion 231, which can fix the weak end of the first extending portion 232 and further reduce the risk of warping deformation of the first extending portion 232 and the first reinforcing portion 234.

[0184] In the present embodiment, the first protruding portion is used to lock the end of the second extending portion 242 away from the second main body portion 241, which can fix the weak end of the second extending portion 242 and further reduce the risk of warping deformation of the second extending portion 242 and the second reinforcing portion 245; and the second protruding portion is used to lock the end of the first extending portion 232 away from the first main body portion 231, which can fix the weak end of the first extending portion 232 and further reduce the risk of warping deformation of the first extending portion 232 and the first reinforcing portion 234.

[0185] Exemplarily, the second electrode terminal 24 further comprises a second protruding portion 2421 extending at least partially to a side of the first extending portion 232 away from the shell 21, the first reinforcing portion 234 and the second protruding portion 2421 at least partially coincide in projection along a third direction, the third direction is perpendicular to the first direction and the second direction, the second protruding portion 2421 is pressed above the first extending portion 232 and the first reinforcing portion 234 along the third direction, which can achieve an interlocking effect, thereby fixing the first extending portion 232 and the first reinforcing portion 234, and reducing the risk of warping deformation of the first extending portion 232 and the first reinforcing portion 234.

[0186] In the present embodiment, the first electrode terminal 23 and the second electrode terminal 24 are embedded in the third direction to form an interlocking structure, thereby increasing the connection stability of the first electrode terminal 23 and the second electrode terminal 24 with the shell 21, reducing the risk of warping deformation of the first extending portion 232 and the second extending portion 242, and improving the structural compactness of the battery monomer 20.

[0187] According to some embodiments of the present application, as Figure 15As shown, the projection of the first main body portion 231 and the second extension portion 242 along the third direction at least partially coincides, and the projection of the second main body portion 241 and the first extension portion 232 along the third direction at least partially coincides.

[0188] As shown, the projection of the first main body portion 231 and the second extension portion 242 along the third direction at least partially coincides, and the projection of the second main body portion 241 and the first extension portion 232 along the third direction at least partially coincides. Figure 13 and Figure 14 As shown, the projection of the first main body portion 231 and the second extension portion 242 along the third direction at least partially coincides, and the projection of the second main body portion 241 and the first extension portion 232 along the third direction at least partially coincides.

[0189] As shown, the projection of the first main body portion 231 and the second extension portion 242 along the third direction at least partially coincides, and the projection of the second main body portion 241 and the first extension portion 232 along the third direction at least partially coincides.

[0190] As shown, the projection of the first main body portion 231 and the second extension portion 242 along the third direction at least partially coincides, and the projection of the second main body portion 241 and the first extension portion 232 along the third direction at least partially coincides.

[0191] As shown, the projection of the first main body portion 231 and the second extension portion 242 along the third direction at least partially coincides, and the projection of the second main body portion 241 and the first extension portion 232 along the third direction at least partially coincides.

[0192] According to some embodiments of the present application, as shown in Figure 8 and Figure 19 The battery cell 20 further comprises an insulating member 26, at least part of the insulating member 26 is arranged between the first electrode terminal 23, the second electrode terminal 24 and the shell 21 two by two.

[0193] The insulating member 26 can be connected to the shell 21 by welding, clamping or fastening, etc.

[0194] In the embodiment, the insulating member 26 is used for insulation between the first electrode terminal 23, the second electrode terminal 24 and the shell 21.

[0195] At least part of the insulating member 26 is arranged between the first electrode terminal 23 and the second electrode terminal 24 to realize insulation between the first electrode terminal 23 and the second electrode terminal 24; at least part of the insulating member 26 is arranged between the first electrode terminal 23 and the shell 21 to realize insulation between the first electrode terminal 23 and the shell 21; at least part of the insulating member 26 is arranged between the second electrode terminal 24 and the shell 21 to realize insulation between the second electrode terminal 24 and the shell 21.

[0196] For example, the insulating member 26 can be a ceramic member, a plastic member or a rubber member.

[0197] According to some embodiments of the present application, as shown in Figure 8 and Figure 19 At least part of the insulating member 26 is arranged in the shell 21, at least part of the insulating member 26 is connected to the shell 21, and the first electrode terminal 23 and the second electrode terminal 24 are mounted on the insulating member 26.

[0198] According to some embodiments of the present application, as shown in Figure 15 The projection of the first electrode terminal 23, the insulating member 26 and the second electrode terminal 24 in the third direction at least partially overlaps.

[0199] At least part of the first electrode terminal 23, at least part of the insulating member 26 and at least part of the second electrode terminal 24 form interlocking in the third direction, so as to increase the connection stability of the first electrode terminal 23 and the second electrode terminal 24 to the shell 21, improve the structural compactness of the battery cell 20, and realize insulation between the first electrode terminal 23 and the second electrode terminal 24.

[0200] According to some embodiments of the present application, as shown in Figure 10 and Figure 20 The insulating member 26 comprises an insulating plate 261 and a spacer 262.

[0201] The first electrode terminal 23 and the second electrode terminal 24 are spaced apart and mounted to the insulating plate 261 to insulate the first electrode terminal 23 and the second electrode terminal 24, at least part of the insulating plate 261 is arranged between the first reinforcing portion 234 and the housing 21 to insulate the first reinforcing portion 234 and the housing 21, and at least part of the insulating plate 261 is arranged between the second reinforcing portion 245 and the housing 21 to insulate the second reinforcing portion 245 and the housing 21.

[0202] The first reinforcing portion of the first electrode terminal 23 and the second reinforcing portion of the second electrode terminal 24 are supported by the insulating plate 261, and the insulating plate 261 is used for insulation between the first electrode terminal 23 and the housing 21 and between the second electrode terminal 24 and the housing 21.

[0203] The spacer 262 is connected to the insulating plate 261, and the spacer 262 is arranged between the first electrode terminal 23 and the second electrode terminal 24, the first electrode terminal 23 and the second electrode terminal 24 are spaced apart to facilitate mounting on both sides of the spacer 262, and the spacer 262 is used for insulation between the first electrode terminal 23 and the second electrode terminal 24.

[0204] The insulating plate 261 and the spacer 262 can be connected by integral molding or gluing.

[0205] In some embodiments, the insulating member 26 is an injection molded member, the first electrode terminal 23 and the second electrode terminal 24 are placed in a plastic molding mold, and a thermoplastic or thermosetting material is injected into the plastic molding mold to form the insulating member 26, so that the first electrode terminal 23, the second electrode terminal 24 and the insulating member 26 form an assembly, and the assembly formed by the first electrode terminal 23, the second electrode terminal 24 and the insulating member 26 can be integrally assembled with the housing 21, reducing the difficulty of installation.

[0206] According to some embodiments of the present application, as shown in Figure 9 and Figure 10 The spacer 262 includes a first segment 2621, a second segment 2622 and a third segment 2623 connected in sequence, and the first segment 2621, the second segment 2622 and the third segment 2623 are integrally formed.

[0207] The first segment 2621 is located between the first main body portion 231 and the second extending portion 242, the second segment 2622 is located between the first extending portion 232 and the second extending portion 242, and the third segment 2623 is located between the first extending portion 232 and the second main body portion 241.

[0208] In the embodiment, the spacer 262 is provided as the first segment 2621, the second segment 2622 and the third segment 2623 connected in sequence, so as to insulate the first electrode terminal 23 and the second electrode terminal 24 and reduce the risk of short circuit. The positions and lengths of the first segment 2621, the second segment 2622 and the third segment 2623 can be set according to the structure of the first electrode terminal 23 and the second electrode terminal 24.

[0209] In some embodiments, as shown in Figure 9 , the first segment 2621 and the third segment 2623 are arranged in parallel, and the first segment 2621 and the third segment 2623 are both bent relative to the second segment 2622, so as to form a Z-shaped structure, thereby improving the compactness of the layout of the first electrode terminal 23 and the second electrode terminal 24.

[0210] According to some embodiments of the present application, as shown in Figure 13 , Figure 14 , Figure 24 and Figure 25 , the projections of the first protruding portion 2311, the first segment 2621 and the second extending portion 242 along the third direction at least partially overlap, and part of the first segment 2621 is clamped between the first protruding portion 2311 and the second extending portion 242, so as to achieve the interlocking effect of the first protruding portion 2311 and the second extending portion 242 and insulation at the same time.

[0211] The projections of the first extending portion 232, the third segment 2623 and the second protruding portion 2421 along the third direction at least partially overlap, and part of the third segment 2623 is clamped between the first extending portion 232 and the second protruding portion 2421, so as to achieve the interlocking effect of the first extending portion 232 and the second protruding portion 2421 and insulation at the same time.

[0212] In the embodiment, as shown in Figure 9 , the second segment 2622 is arranged between the first extending portion 232 and the second extending portion 242, so as to achieve insulation between the first extending portion 232 and the second extending portion 242.

[0213] For example, the projections of the first extension 232, the second segment 2622 and the second extension 242 along the third direction can at least partially coincide, thereby forming an interlocking effect between the first extension 232 and the second extension 242 and meanwhile realizing insulation between the first extension 232 and the second extension 242; or the projections of the first extension 232, the second segment 2622 and the second extension 242 along the third direction do not coincide, and the second segment 2622 is only located between the first extension 232 and the second extension 242, which can also realize insulation between the first extension 232 and the second extension 242, while not affecting the connection area of the first extension 232 and the second extension 242 with the bus bars respectively, thereby improving the reliability of the connection of the first electrode terminal 23 and the second electrode terminal 24 with the corresponding bus bars.

[0214] According to some embodiments of the present application, the length of the first protrusion 2311 along the second direction is less than the length of the first segment 2621 along the second direction, so as to facilitate the concave-convex fitting connection of the first protrusion 2311 with the first segment 2621; and the length of the second protrusion 2421 along the second direction is less than the length of the third segment 2623 along the second direction, so as to facilitate the concave-convex fitting connection of the second protrusion 2421 with the third segment 2623.

[0215] According to some embodiments of the present application, as shown in Figure 15 the first segment 2621 is provided with a first recess 26211 and a second recess 26212 on two sides along the first direction, the openings of the first recess 26211 and the second recess 26212 respectively face the first main body part 231 and the second extension 242, the first main body part 231 is provided with a first protrusion 2311 matched with the first recess 26211, and the second extension 242 is provided with a second protrusion 2421 matched with the second recess 26212.

[0216] The first recess 26211 and the first protrusion 2311 of the first main body part 231 are in concave-convex fitting, and the second recess 26212 and the second protrusion 2421 of the second extension 242 are in concave-convex fitting, thereby making the projections of the first main body part 231, the first segment 2621 and the second extension 242 along the third direction at least partially coincide, and the first main body part 231, the first segment 2621 and the second extension 242 form an interlocking structure in concave-convex fitting, which can realize insulation between the first electrode terminal 23 and the second electrode terminal 24, and meanwhile improve the stability of the connection of the first electrode terminal 23 and the second electrode terminal 24 with the insulating member 26, and improve the compactness of the structural layout.

[0217] Exemplarily, the local parts of the first segment 2621 on both sides in the first direction can form the first groove 26211 and the second groove 26212, or the whole of the first segment 2621 on both sides in the first direction can form the first groove 26211 and the second groove 26212, both of which can realize the interlocking and insulation effects.

[0218] The third segment 2623 is provided with a third groove and a fourth groove on both sides in the first direction, and the openings of the third groove and the fourth groove are respectively directed to the first extension 232 and the second main body 241. The first extension 232 is provided with a third protrusion part matched with the third groove, and the second main body 241 is provided with a fourth protrusion part matched with the fourth groove.

[0219] The third groove and the fourth groove are matched with the third protrusion part of the first extension 232 and the fourth protrusion part of the second main body 241 respectively, so that the projection of the first extension 232, the third segment 2623 and the second main body 241 in the third direction at least partially coincides, and the first extension 232, the third segment 2623 and the second main body 241 form the interlocking structure of the concave-convex matching, which not only realizes the insulation of the first electrode terminal 23 and the second electrode terminal 24, but also improves the stability of the connection of the first electrode terminal 23 and the second electrode terminal 24 with the insulation piece 26, and improves the compactness of the structural layout.

[0220] Exemplarily, the local parts of the first segment 2621 on both sides in the first direction can form the first groove 26211 and the second groove 26212, or the whole of the first segment 2621 on both sides in the first direction can form the first groove 26211 and the second groove 26212, both of which can realize the interlocking and insulation effects.

[0221] According to some embodiments of the present application, as shown in Figure 20 The length of the first groove 26211 in the second direction is less than the length of the first segment 2621 in the second direction, that is, the local part of the first segment 2621 on one side towards the first main body 231 forms the first groove 26211, which not only realizes the concave-convex engagement connection of the first groove 26211 and the first protrusion part 2311, but also realizes the positioning cooperation of the first groove 26211 and the first protrusion part 2311.

[0222] According to some embodiments of the present application, the length of the second groove 26212 in the second direction is less than the length of the first segment 2621 in the second direction, that is, the local part of the first segment 2621 on one side towards the second extension 242 forms the second groove 26212, which not only realizes the concave-convex engagement connection of the second groove 26212 and the second protrusion part 2421, but also realizes the positioning cooperation of the second groove 26212 and the second protrusion part 2421.

[0223] According to some embodiments of the present application, the length of the fourth groove along the second direction is less than the length of the third segment 2623 along the second direction, that is, the fourth groove is formed on the side of the third segment 2623 facing the second main body part 241, so as to realize the concave-convex engagement connection of the fourth groove and the fourth protrusion and the positioning fit of the fourth groove and the fourth protrusion.

[0224] According to some embodiments of the present application, the length of the third groove along the second direction is less than the length of the third segment 2623 along the second direction, that is, the third groove is formed on the side of the third segment 2623 facing the first extension part 232, so as to realize the concave-convex engagement connection of the third groove and the third protrusion and the positioning fit of the third groove and the third protrusion.

[0225] According to some embodiments of the present application, the length of the second protrusion 2421 along the second direction is greater than the length of the first protrusion 2311 along the second direction, so as to reduce the processing difficulty.

[0226] According to some embodiments of the present application, the length of the third protrusion along the second direction is greater than the length of the fourth protrusion along the second direction, so as to reduce the processing difficulty.

[0227] According to some embodiments of the present application, as shown in Figure 15 , the groove wall and the groove bottom of the first groove 26211, the second groove 26212, the third groove and the fourth groove are provided with chamfers, so as to facilitate assembly and reduce stress concentration.

[0228] According to some embodiments of the present application, the third direction can be the height direction of the battery monomer 20, the height of the spacer 262 along the third direction is greater than the height of the first electrode terminal 23 and the second electrode terminal 24 along the third direction, so as to improve the insulation effect between the first electrode terminal 23 and the second electrode terminal 24 and reduce the risk of short circuit.

[0229] According to some embodiments of the present application, as shown in Figure 10 and Figure 24 , the spacer 262 includes a first spacing part 2624 and a second spacing part 2625 distributed along the third direction, and the sum of the heights of the first spacing part 2624 and the second spacing part 2625 along the third direction is greater than the height of the first electrode terminal 23 and the second electrode terminal 24 along the third direction.

[0230] The height of the first spacing part 2624 along the third direction is not greater than the first electrode terminal 23 and the second electrode terminal 24, the height of the first spacing part 2624 along the third direction is equal to or less than the first electrode terminal 23 and the second electrode terminal 24, and the first spacing part 2624 is used for insulation between the first electrode terminal 23 and the second electrode terminal 24.

[0231] The second interval portion 2625 has a height in the third direction greater than the first electrode terminal 23 and the second electrode terminal 24. The second interval portion 2625 is configured to provide an additional insulation space for the first electrode terminal 23 and the second electrode terminal 24 to reduce the risk of insulation due to vibration of the first electrode terminal 23 and the second electrode terminal 24 in the third direction.

[0232] According to some embodiments of the present application, as shown in Figure 20 and Figure 21 The second segment 2622 of the second interval portion 2625 has at least one positioning portion 26251, which can include one or more positioning portions 26251 distributed on the second segment 2622 of the second interval portion 2625.

[0233] The positioning portion 26251 can be a protrusion or a groove, which is configured to cooperate with the busbar to position the busbar to reduce the difficulty of assembly of the electrode terminal and the busbar. The positioning portion 26251 can extend in the third direction on the second segment 2622 of the second interval portion 2625.

[0234] For example, the positioning portion 26251 can be arranged on both sides of the second segment 2622 of the second interval portion 2625 in the second direction to have positioning effect on the busbar connected to the first electrode terminal 23 and the busbar connected to the second electrode terminal 24.

[0235] According to some embodiments of the present application, as shown in Figure 20 The first interval portion 2624 has at least one first limiting portion 26241, which is configured to cooperate with the first extension portion 232 and the second extension portion 242 to limit the freedom of the first extension portion 232 and the second extension portion 242 in the third direction.

[0236] The at least one first limiting portion 26241 is arranged at one end of the first interval portion 2624 close to the second interval portion 2625 in the third direction to limit the movement of the first electrode terminal 23 and the second electrode terminal 24 beyond the first interval portion 2624 towards the second interval portion 2625.

[0237] The at least one first limiting portion 26241 can be arranged at least one of the first segment 2621, the second segment 2622 and the third segment 2623 of the first interval portion 2624.

[0238] The at least one first limiting portion 26241 can be arranged on both sides of the first interval portion 2624 to limit the first electrode terminal 23 and the second electrode terminal 24 in the third direction.

[0239] The first limiting portion 26241 can be a protrusion.

[0240] The first limiting part 26241 can include a plurality of first limiting parts 26241 distributed along the extension direction of the first interval part 2624 to enhance the limiting effect.

[0241] In some embodiments, as shown in Figure 20 The second section 2622 of the first interval part 2624 has at least one first limiting part 26241, which limits the first extension part 232 and the second extension part 242, thereby limiting the movement of the first electrode terminal 23 and the second electrode terminal 24 towards the second interval part 2625 across the first interval part 2624.

[0242] The first limiting part 26241 can be arranged on both sides of the second section 2622 of the first interval part 2624 to limit the first extension part 232 and the second extension part 242 in the third direction.

[0243] The first limiting part 26241 can extend along the second section 2622 of the first interval part 2624 to enhance the limiting effect.

[0244] The first limiting part 26241 can include a plurality of first limiting parts 26241 distributed along the extension direction of the second section 2622 of the first interval part 2624 to enhance the limiting effect.

[0245] In some embodiments, as shown in Figure 8 The battery monomer 20 further includes a fixing part 27, at least part of the fixing part 27 is arranged on the side of the first electrode terminal 23 and the second electrode terminal 24 away from the shell 21, and the fixing part 27 is connected with the shell 21.

[0246] In this embodiment, the fixing part 27 can fix the first electrode terminal 23 and the second electrode terminal 24 to improve the stability of the connection between the first electrode terminal 23 and the second electrode terminal 24 and the shell 21.

[0247] The connection mode of the insulating part 26 and the shell 21 includes at least the following two modes:

[0248] One of them, as shown in Figure 8 The insulating part 26 is connected with the shell 21 through the fixing part 27.

[0249] In this embodiment, the battery monomer 20 further includes a fixing part 27, and the insulating part 26 and the fixing part 27 can be connected by clamping, sleeving or gluing, and the fixing part 27 is used to be connected with the shell 21 by welding.

[0250] The fixing member 27 can be sleeved with the frame 263 of the insulating member 26, and the insulating member 26 can realize insulation between the first electrode terminal 23, the second electrode terminal 24, the shell 21 and the fixing member 27.

[0251] As shown in Figure 8 and Figure 10 , at least part of the insulating member 26 is arranged on the outer periphery of the fixing member 27 to realize the sleeving of the insulating member 26 and the fixing member 27.

[0252] At least part of the first electrode terminal 23 and the second electrode terminal 24 are connected with the tab 221 of the electrode assembly 22 in sequence through the insulating member 26 and the fixing member 27.

[0253] As shown in Figure 11 , the first main body part 231 of the first electrode terminal 23 and the second main body part 241 of the second electrode terminal 24 extend into the shell 21 through the insulating member 26 and the fixing member 27 and are electrically connected with the tab 221 of the electrode assembly 22.

[0254] By arranging the fixing member 27, the insulating member 26 is connected with the shell 21 through the fixing member 27, and the assembly formed by the first electrode terminal 23, the second electrode terminal 24 and the insulating member 26 can be integrally assembled with the shell 21, thereby realizing modular assembly and reducing assembly difficulty.

[0255] According to some embodiments of the present application, as shown in Figure 8 and Figure 12 , the fixing member 27 is provided with a bent flange 271 outwardly, and the flange 271 is used to be connected with the shell 21 by welding.

[0256] The flange 271 extends along the extension direction of the fixing member 27, and by arranging the flange 271, the welding area of the fixing member 27 and the shell 21 can be increased, the connection reliability can be increased, and the sealing effect of the connection part of the fixing member 27 and the shell 21 can be improved.

[0257] According to some embodiments of the present application, as shown in Figure 8 and Figure 10 , at least part of the insulating member 26 is arranged between the electrode terminal and the fixing member 27.

[0258] At least part of the insulating member 26 is arranged between the first electrode terminal 23 and the fixing member 27 to insulate the first electrode terminal 23 and the fixing member 27, at least part of the insulating member 26 is arranged between the second electrode terminal 24 and the fixing member 27 to insulate the second electrode terminal 24 and the fixing member 27, and the fixing member 27 is used to fix the insulating member 26, the first electrode terminal 23 and the second electrode terminal 24 to increase the stability of the connection of the insulating member 26, the first electrode terminal 23 and the second electrode terminal 24 with the shell 21.

[0259] According to some embodiments of the present application, as shown in Figure 8 and Figure 10 The insulating piece 26 further comprises a frame 263, the frame 263, the insulating plate 261 and the spacer 262 form a first accommodating cavity 264 and a second accommodating cavity 265, the first accommodating cavity 264 and the second accommodating cavity 265 are respectively arranged on both sides of the spacer 262, the first accommodating cavity 264 is used for accommodating the first electrode terminal 23, and the second accommodating cavity 265 is used for accommodating the second electrode terminal 24.

[0260] The height of the frame 263 along the third direction is higher than that of the insulating plate 261, that is, the first accommodating cavity 264 and the second accommodating cavity 265 are both grooves, so that the first electrode terminal 23 and the second electrode terminal 24 can be installed in the grooves, the stability of the connection between the first electrode terminal 23 and the second electrode terminal 24 and the insulating piece 26 is improved, the risk of displacement of the first electrode terminal 23 and the second electrode terminal 24 is reduced, and the reliability of the battery monomer 20 is improved.

[0261] In some embodiments, as shown in Figure 20 The frame 263 is provided with a second limiting part 26242, and the second limiting part 26242 is protruded inward along the extension direction of the frame 263.

[0262] The second limiting part 26242 can be relatively arranged with the first limiting part, or can be misaligned, and the second limiting part 26242 is used for limiting the movement of the first electrode terminal 23 and the second electrode terminal 24 along the third direction.

[0263] The second limiting part 26242 can be protruded.

[0264] The second limiting part 26242 can comprise a plurality of second limiting parts 26242, and the plurality of second limiting parts 26242 are arranged at intervals along the extension direction of the frame 263, so as to enhance the limiting effect on the first electrode terminal 23 and the second electrode terminal 24.

[0265] For example, as shown in Figure 20 The second limiting part 26242 comprises two second limiting parts arranged at both ends of the frame 263 along the first direction and two second limiting parts arranged at both ends of the frame 263 along the second direction.

[0266] In the embodiment, the insulating member 26 can be an injection molded member, the first electrode terminal 23 and the second electrode terminal 24 are placed in the injection molded film and then injection molded to form the insulating member 26, thus the first limiting member and the second limiting part 26242 do not interfere with the assembly of the first electrode terminal 23 and the second electrode terminal 24 and the insulating member 26, and after the insulating member 26 is injection molded, the first limiting member and the second limiting part 26242 can limit the movement of the first electrode terminal 23 and the second electrode terminal 24 relative to the insulating member 26 in the third direction, thereby improving the connection reliability of the first electrode terminal 23, the second electrode terminal 24 and the insulating member 26.

[0267] In some embodiments, as shown in Figure 20 The first limiting member is arranged opposite to the second limiting part 26242 to limit the movement of the first extending part 232 and the second extending part 242 in the third direction.

[0268] In the embodiment, the two second limiting parts 26242 arranged at the two ends of the insulating member 26 in the second direction are arranged opposite to the two first limiting members arranged on the two sides of the second section 2622 of the first spacing part 2624, so as to limit the two sides of the first extending part 232 in the second direction and the two sides of the second extending part 242 in the second direction, thereby further improving the stability of the connection between the first electrode terminal 23, the second electrode terminal 24 and the insulating member 26.

[0269] According to some embodiments of the present application, the fixing member 27 is provided with a protruding part extending in the extension direction of the fixing member 27, the frame 263 is provided with a recessed part matched with the protruding part, and the insulating member 26 and the fixing member 27 are connected through the concave-convex matching of the protruding part and the recessed part.

[0270] The protruding part of the fixing member 27 can include a plurality of protruding parts, and the plurality of protruding parts are distributed at intervals in the extension direction of the fixing member 27; correspondingly, the recessed part of the frame 263 can include a plurality of recessed parts, and the plurality of recessed parts are distributed at intervals in the extension direction of the frame 263, so that the plurality of recessed parts and the plurality of protruding parts form a multi-point connection, thereby increasing the stability of the connection between the fixing member 27 and the insulating member 26, and facilitating the assembly and disassembly of the fixing member 27 and the insulating member 26, and reducing the installation difficulty.

[0271] According to some embodiments of the present application, as shown in Figure 8 The fixing member 27 is provided with at least one air hole 272 to maintain the air pressure balance inside and outside the fixing member 27 in the case of injection molding, thereby facilitating the injection molding of the insulating member 26.

[0272] According to some embodiments of the present application, as shown in Figure 10As shown, the insulation member 26 includes two first avoiding holes 266 arranged along the first direction, the two first avoiding holes 266 are arranged at positions corresponding to the first body part 231 of the first electrode terminal 23 and the second body part 241 of the second electrode terminal 24, and the two first avoiding holes 266 are respectively used for avoiding the part of the first body part 231 and the part of the second body part 241, so that the part of the first body part 231 and the part of the second body part 241 respectively pass through the two first avoiding holes 266 and extend into the shell 21 to be connected with the tab 221 of the electrode assembly 22.

[0273] The diameters of the two first avoiding holes 266 are respectively matched with the part of the first body part 231 and the part of the second body part 241.

[0274] Secondly, as shown, Figure 18 The insulation member 26 is connected with the shell 21 through the electrode terminals.

[0275] Among them, the first electrode terminal 23 further includes a first adapter 233, the first adapter 233 is used for being connected with the first body part 231 and the tab 221 respectively, and the second electrode terminal 24 further includes a second adapter 243, the second adapter 243 is used for being connected with the second body part 241 and the tab 221 respectively.

[0276] As shown in Figure 19 and Figure 20 The insulation member 26 includes two second avoiding holes 267 arranged along the first direction, the two second avoiding holes 267 are arranged at positions corresponding to the first adapter 233 and the second adapter 243, and the two second avoiding holes 267 are respectively used for avoiding the part of the first adapter 233 and the part of the second adapter 243, the first adapter 233 passes through the corresponding second avoiding hole 267 and is electrically connected with the first body part 231 and the first tab 221 respectively, and the second adapter 243 passes through the other second avoiding hole 267 and is electrically connected with the second body part 241 and the second tab 221 respectively.

[0277] The first adapter 233 and the second adapter 243 pass through the insulation member 26 and the shell 21, so that the insulation member 26 and the shell 21 can be connected.

[0278] According to some embodiments of the present application, the second reinforcing part 245 coincides with at least part of the projection of the second adapter 243 along the third direction, the projection of the second adapter 243 along the third direction can fall into the projection of the second reinforcing part 245 along the third direction; or, the projection of the second adapter 243 along the third direction falls into part of the projection of the second reinforcing part 245 along the third direction, and falls into the projection of other part along the third direction, for example, can fall into the projection of the second body part 241 or the shell 21 along the third direction.

[0279] The first reinforcing portion 234 at least partially overlaps with a projection of the first adapter 233 along the third direction, and the projection of the first adapter 233 along the third direction can fall within the projection of the first reinforcing portion 234 along the third direction; or, the projection of the first adapter 233 along the third direction partially falls within the projection of the first reinforcing portion 234 along the third direction, and the other part falls within the projection of the other part along the third direction, for example, can fall within the projection of the first main body portion 231 or the shell 21 along the third direction.

[0280] The third direction is perpendicular to the second direction and the first direction.

[0281] According to some embodiments of the present application, as shown in Figure 22 The first main body portion 231 and the second main body portion 241 are both provided with assembly holes, which can be through holes or blind holes open to the shell 21, the assembly hole of the first main body portion 231 is aligned with the second avoiding hole 267 corresponding to the first main body portion 231, and the assembly hole of the second main body portion 241 is aligned with the second avoiding hole 267 corresponding to the second main body portion 241.

[0282] The assembly hole of the first main body portion 231 is connected with the first adapter 233, so that the first electrode terminal 23, the insulating piece 26 and the shell 21 are connected through the first adapter 233; the assembly hole of the second main body portion 241 is connected with the second adapter 243, so that the second electrode terminal 24, the insulating piece 26 and the shell 21 are connected through the second adapter 243.

[0283] The assembly hole of the first main body portion 231 and the first adapter 233 can be connected by screw connection, plug-in connection or clamping, etc.; the assembly hole of the second main body portion 241 and the second adapter 243 can be connected by screw connection, plug-in connection or clamping, etc.

[0284] According to some embodiments of the present application, the first adapter 233 includes a first connecting portion and a first body, the first body is arranged in the shell 21 and connected with the corresponding tab, and the first connecting portion at least partially penetrates the shell and connects the first main body portion 231 and the first body.

[0285] The assembly hole of the first main body portion 231 is used for connecting with the first connecting portion, and the assembly hole of the first main body portion 231 and the first connecting portion can be connected by screw connection, plug-in connection or clamping, etc.

[0286] One of the two second avoiding holes 267 is used for avoiding the first connecting portion.

[0287] Exemplarily, the first connecting part includes a first portion and a second portion, the first portion is a flat plate structure, the assembly hole of the first body part 231 is a through hole, the second portion extends into the shell 21 through the assembly hole of the first body part 231 and the corresponding second avoiding hole 267 of the insulating part 26, at least part of the first body part 231, the insulating part 26 and the shell 21 are penetrated by the second portion, thereby forming an assembly; the first portion is connected with the corresponding tab 221, the flat plate structure can increase the connection area with the corresponding tab 221, thereby increasing the reliability of the electrical connection.

[0288] As shown in Figure 22 , the second adapter 243 includes a second connecting part 2431 and a second body 2432, the second body 2432 is arranged in the shell 21 and connected with the corresponding tab 221, the second connecting part 2431 at least partially penetrates the shell 21 and connects the second body part 241 and the second body 2432.

[0289] Among them, the assembly hole of the second body part 241 is used for connecting with the second connecting part 2431, and the assembly hole of the second body part 241 and the second connecting part 2431 can be connected through threaded connection, plug-in connection or clamping, etc.

[0290] Among them, the other of the two second avoiding holes 267 is used for avoiding the second connecting part 2431.

[0291] Exemplarily, the first connecting part includes a third portion and a fourth portion, the third portion is a flat plate structure, the assembly hole of the second body part 241 is a through hole, the fourth portion extends into the shell 21 through the assembly hole of the second body part 241 and the corresponding second avoiding hole 267 of the insulating part 26, at least part of the second body part 241, the insulating part 26 and the shell 21 are penetrated by the fourth portion, thereby forming an assembly; the third portion is connected with the corresponding tab 221, the flat plate structure can increase the connection area with the corresponding tab 221, thereby increasing the reliability of the electrical connection.

[0292] According to some embodiments of the present application, as shown in Figure 18 , the battery monomer 20 further includes an insulating sealing ring 28, the insulating sealing ring 28 is respectively sleeved outside the first connecting part and the second connecting part 2431.

[0293] Among them, the insulating sealing ring 28 includes two, two insulating sealing rings 28 are respectively sleeved outside the first connecting part and the second connecting part 2431.

[0294] The outer peripheral wall of the first connecting portion forms a leakage passage between the shell 21, the corresponding second avoiding hole 267 of the insulating member 26, and the corresponding assembly hole of the first body portion 231, which is in communication between the inside and outside of the shell 21. The insulating sealing ring 28 is arranged outside the first connecting portion, so as to block the leakage passage and increase the sealing property of the battery monomer 20.

[0295] The outer peripheral wall of the second connecting portion 2431 forms a leakage passage between the shell 21, the corresponding second avoiding hole 267 of the insulating member 26, and the corresponding assembly hole of the second body portion 241, which is in communication between the inside and outside of the shell 21. The insulating sealing ring 28 is arranged outside the second connecting portion 2431, so as to block the leakage passage and increase the sealing property of the battery monomer 20.

[0296] According to some embodiments of the present application, the present application further provides an electrode terminal, which comprises a body portion, an extension portion, and a reinforcing portion. The body portion is used for being connected with the tab 221. The extension portion is used for being connected with the busbar. The reinforcing portion is arranged inside the extension portion, and the strength of the reinforcing portion is greater than that of the extension portion.

[0297] The body portion is used for being connected with the tab 221 of the electrode assembly 22. The body portion can be connected with the tab 221 by welding or the like.

[0298] The extension portion is connected with the body portion. The extension portion and the body portion can be connected by one-piece forming or welding or the like. The extension portion extends outwardly from the body portion. The extension portion is used for being connected with the busbar.

[0299] In the embodiment, by arranging the extension portion, the connection area of the electrode terminal and the busbar can be increased, and the reliability of the electrical connection can be increased.

[0300] For example, the extension portion can be arranged in a flat shape, i.e., the extension portion is arranged in a structure with a large length-width ratio, so as to be connected with the busbar, which is a conductive connecting piece between different battery monomers 20. The extension length of the extension portion can be arranged according to the layout requirement of the battery monomer 20 in the battery device 100.

[0301] In some embodiments, the surface of the extension portion is provided with a tin plating layer, so as to improve the oxidation resistance and the conductive property.

[0302] For example, as shown in FIG. 6, the reinforcing portion is arranged inside the extension portion, i.e., the reinforcing portion is arranged in the region between the extension portion and the shell 21. Figure 23

[0303] For example, the reinforcing portion can be connected with the inside of the extension portion by gluing, welding, or thermal compounding or the like, or can be stacked by contact lamination or the like.

[0304] ​The reinforcing portion is located between the extension portion and the shell 21, the extending direction of the reinforcing portion is consistent with the extension portion, and the width of the reinforcing portion is not greater than the width of the extension portion, so as to facilitate the assembly of the extension portion and the reinforcing portion with the shell 21.

[0305] The strength of the reinforcing portion is not less than the strength of the extension portion, that is, the strength of the reinforcing portion is greater than or equal to the strength of the extension portion, and the reinforcing portion is arranged on the inner side of the extension portion, so as to reduce the deformation risk of the extension portion and improve the bending strength and shear strength of the extension portion.

[0306] According to the electrode terminal provided by the embodiment of the present application, the existence of the reinforcing portion makes the extension portion of the electrode terminal not easy to deform or break when bearing external pressure or vibration, so as to reduce the deformation risk of the extension portion due to the weak structural strength caused by the large length-width ratio, thereby improving the overall reliability and safety of the battery monomer 20.

[0307] According to some embodiments of the present application, the present application also provides a cover plate assembly 29 applied to the battery device 100, the cover plate assembly 29 comprising: a cover plate body 291 and the electrode terminal of any of the above embodiments.

[0308] The shell 21 comprises the cover plate assembly 29 and a shell, and the shell and the cover plate assembly 29 form a containing cavity for containing the electrode assembly 22.

[0309] The electrode terminal is insulatedly connected with the cover plate body 291, and the electrode terminal can be insulated from the cover plate body 291 by being mounted on the insulating piece 26.

[0310] For example, the electrode terminal can be connected with the cover plate body 291 through the fixing piece 27, or can be assembled with the cover plate body 291 through the adapter.

[0311] According to the cover plate assembly 29 provided by the embodiment of the present application, by arranging the electrode terminal of any of the above embodiments, the existence of the reinforcing portion makes the extension portion of the electrode terminal not easy to deform or break when bearing external pressure or vibration, so as to reduce the deformation risk of the extension portion due to the weak structural strength caused by the large length-width ratio, thereby improving the reliability of the cover plate assembly 29, and improving the overall reliability and safety of the battery monomer 20.

[0312] According to some embodiments of the present application, the present application also provides a battery device 100, the battery device 100 comprising a plurality of battery monomers 20.

[0313] According to the battery device 100 provided by the embodiment of the present application, by arranging the battery monomer 20 of any of the above embodiments, the battery monomer 20 is provided with the electrode terminal, and the existence of the reinforcing part makes the extension part of the electrode terminal not easy to deform or break when bearing external pressure or vibration, so as to reduce the deformation risk of the extension part due to the weak structural strength of the large length-width ratio, thereby improving the reliability of the cover plate assembly 29, thereby improving the overall reliability and safety of the battery monomer 20, and thereby improving the reliability of the battery device 100.

[0314] In some embodiments, the battery device 100 further comprises a busbar, the busbar is electrically connected with the extension part of the corresponding battery monomer 20.

[0315] The busbar is used for electrically connecting two or more battery monomers 20.

[0316] For example, the busbar can electrically connect two adjacent battery monomers 20, and a plurality of busbars can electrically connect a plurality of battery monomers 20 in the battery device 100.

[0317] The busbar can be multiple, each busbar in the plurality of busbars is electrically connected with at least two battery monomers 20, so as to electrically connect a plurality of battery monomers.

[0318] According to some embodiments of the present application, the present application also provides an energy storage device 1, comprising: a plurality of battery monomers 20 of any of the above embodiments or a plurality of battery devices 100 of any of the above embodiments, the battery monomer 20 or the battery device 100 is used for storing or providing electric energy.

[0319] According to the energy storage device 1 provided by the embodiment of the present application, by arranging a plurality of battery monomers 20 of any of the above embodiments or a plurality of battery devices 100 of any of the above embodiments, the reliability and safety of the energy storage device 1 can be improved.

[0320] According to some embodiments of the present application, the present application also provides an energy storage system, comprising: a power conversion device and an energy storage device 1 as in the above embodiments, the power conversion device is used for electrically connecting a power generation equipment 3 and the energy storage device 1.

[0321] According to the energy storage system provided by the embodiment of the present application, by arranging a plurality of energy storage devices 1 of any of the above embodiments, the reliability and safety of the energy storage system can be improved.

[0322] According to some embodiments of the present application, the present application also provides a power consumption device, comprising: a battery monomer 20 as in any of the above embodiments, a battery device 100 as in any of the above embodiments, an energy storage device 1 as in any of the above embodiments or an energy storage system as in any of the above embodiments.

[0323] The battery cell 20 is used to store or provide electric energy; the battery device 100 is used to store or provide electric energy; the battery cell 20 or the battery device 100 is used to store or provide electric energy; the battery cell 20 or the battery device 100 is used to store or provide electric energy.

[0324] The electric device can be the equipment or system of any of the application battery devices 100.

[0325] According to the energy storage system provided by the embodiments of the present application, by setting the battery cell 20 of any of the above embodiments, the battery device 100 of any of the above embodiments, the energy storage device 1 of any of the above embodiments, or the energy storage system of any of the above embodiments, the reliability and safety of the electric device can be improved.

[0326] According to some embodiments of the present application, the present application also provides a charging network, comprising: a charging pile 4 and an energy storage device 1 of any of the above embodiments or an energy storage system of any of the above embodiments, the energy storage device 1 being used to provide electric energy for the charging pile 4.

[0327] According to the charging network provided by the embodiments of the present application, by setting the energy storage device 1 of any of the above embodiments or the energy storage system of any of the above embodiments, the reliability and safety of the charging network can be improved.

[0328] The energy storage device 1 can be located inside the charging pile 4 (for example, a charging and storage integrated machine) or outside the charging pile 4.

[0329] The battery cell 20 of the present application is described below with two specific embodiments.

[0330] In embodiment one, the present application provides a battery cell 20, which comprises a shell 21, an electrode assembly 22, an insulating piece 26, a fixing piece 27, a first electrode terminal 23 and a second electrode terminal 24, the first electrode terminal 23 and the second electrode terminal 24 being an integral structure.

[0331] The insulating piece 26 comprises an insulating plate 261, a spacer 262 and a frame 263, the frame 263, the insulating plate 261 and the spacer 262 forming a first accommodating cavity 264 and a second accommodating cavity 265, the first accommodating cavity 264 being used to accommodate the first electrode terminal 23, and the second accommodating cavity 265 being used to accommodate the second electrode terminal 24. The insulating plate 261 is used for insulation between the first electrode terminal 23 and the shell 21 and between the second electrode terminal 24 and the shell 21, and the spacer 262 is used for insulation between the first electrode terminal 23 and the second electrode terminal 24.

[0332] In the embodiment, the insulating member 26 is an injection molded member, the first electrode terminal 23 and the second electrode terminal 24 are placed in a plastic molding mold, and a thermoplastic plastic or thermosetting material is injected into the plastic molding mold to form the insulating member 26, so that the first electrode terminal 23, the second electrode terminal 24, and the insulating member 26 form an assembly, and the assembly formed by the first electrode terminal 23, the second electrode terminal 24, and the insulating member 26 can be integrally assembled with the shell 21, thereby reducing the difficulty of installation.

[0333] The fixing member 27 can be sleeved with the frame 263 of the insulating member 26, the fixing member 27 is connected with the cover body 291 of the shell 21 by welding, and at least part of the first electrode terminal 23 and the second electrode terminal 24 pass through the insulating member 26 and the fixing member 27 in sequence and extend into the shell 21 to be connected with the tab 221 of the electrode assembly 22.

[0334] In the second embodiment, the application provides a battery monomer 20, which comprises a shell 21, an electrode assembly 22, an insulating member 26, a first electrode terminal 23, and a second electrode terminal 24, and the first electrode terminal 23 and the second electrode terminal 24 are in a split structure.

[0335] The first electrode terminal 23 further comprises a first adapter 233 for electrically connecting with the first main body part 231 and the tab 221 respectively, and the second electrode terminal 24 further comprises a second adapter 243 for electrically connecting with the second main body part 241 and the tab 221 respectively, and the insulating member 26 is connected with the shell 21 through the first adapter 233 and the second adapter 243.

[0336] The first adapter 233 and the second adapter 243 are arranged in the insulating member 26 and the shell 21, so that the insulating member 26 and the shell 21 can be connected.

[0337] The battery monomer 20 further comprises two insulating sealing rings 28, which are sleeved outside the first connecting part and the second connecting part 2431 respectively, can block the leakage channels outside the first connecting part and the second connecting part 2431, and increase the sealing performance of the battery monomer 20.

[0338] If not particularly stated, all the embodiments and optional embodiments of the application can be combined to form new technical solutions.

[0339] If not particularly stated, all the technical features and optional technical features of the application can be combined to form new technical solutions.

[0340] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A battery cell, characterized by, The battery cell comprises: a housing comprising a wall portion; an electrode assembly mounted in the housing, the electrode assembly comprising a tab; an electrode terminal provided on the housing, the electrode terminal comprising a body portion, an extension portion and a reinforcing portion, the body portion being electrically connected to the tab, the extension portion protruding from the body portion in a first direction perpendicular to a thickness direction of the wall portion, the extension portion being connected to the body portion and electrically connected to a busbar, and the reinforcing portion being at least partially provided on a side of the extension portion facing the wall portion.

2. The battery cell of claim 1, wherein, The two electrode terminals comprise a first electrode terminal and a second electrode terminal provided in an insulating manner, the body portion, the extension portion and the reinforcing portion of the first electrode terminal are respectively a first body portion, a first extension portion and a first reinforcing portion, the body portion, the extension portion and the reinforcing portion of the second electrode terminal are respectively a second body portion, a second extension portion and a second reinforcing portion, the first body portion and the second body portion are arranged in a first direction, the first extension portion and the second extension portion are arranged in a second direction, the first direction is perpendicular to the second direction, the first reinforcing portion is provided between the first extension portion and the wall portion, and the second reinforcing portion is provided between the second extension portion and the wall portion.

3. The battery cell according to claim 2, wherein the first electrode terminal further comprises a first protrusion portion, the first protrusion portion at least partially extends to a side of the second extension portion away from the housing, a projection of the second reinforcing portion along a third direction at least partially coincides with the first protrusion portion, and the third direction is perpendicular to the first direction and the second direction; and / or the second electrode terminal further comprises a second protrusion portion, the second protrusion portion at least partially extends to a side of the first extension portion away from the housing, a projection of the first reinforcing portion along the third direction at least partially coincides with the second protrusion portion, and the third direction is perpendicular to the first direction and the second direction.

4. The battery cell of claim 3, wherein, a side of the first body portion facing the second extension portion is connected to the first protrusion portion, and a side of the second body portion facing the first extension portion is connected to the second protrusion portion.

5. The battery cell according to claim 3 or 4, characterized in that, The battery cell further comprises an insulating member at least partially provided between the first electrode terminal, the second electrode terminal and the housing.

6. The battery cell of claim 5, wherein, The insulating member is at least partially provided in the housing.

7. The battery cell according to claim 5 or 6, characterized in that The insulating member comprises: an insulating plate, the first electrode terminal and the second electrode terminal are spaced apart and mounted on the insulating plate, and the insulating plate is at least partially provided between the first reinforcing portion and the housing and between the second reinforcing portion and the housing; a spacer connected to the insulating plate and arranged between the first electrode terminal and the second electrode terminal.

8. The battery cell of claim 7, wherein, The spacer comprises a first segment, a second segment and a third segment connected in sequence, the first segment is located between the first body portion and the second extension portion, the second segment is located between the first extension portion and the second extension portion, and the third segment is located between the first extension portion and the second body portion.

9. The battery cell of claim 8, wherein, The projection of the first protrusion, the first segment and the second extension along a third direction at least partially coincide, and part of the first segment is clamped between the first protrusion and the second extension; The projection of the first extension, the third segment and the second protrusion along a third direction at least partially coincide, and part of the third segment is clamped between the first extension and the second protrusion.

10. The battery cell according to claim 8 or 9, characterized in that, The length of the first protrusion along the second direction is less than the length of the first segment along the second direction, and the length of the second protrusion along the second direction is less than the length of the third segment along the second direction.

11. The battery cell of any one of claims 8-10, wherein, The spacer comprises a first spacer portion and a second spacer portion distributed along a third direction, the height of the first spacer portion along the third direction is not greater than the first electrode terminal and the second electrode terminal, and the height of the second spacer portion along the third direction is greater than the first electrode terminal and the second electrode terminal.

12. The battery cell of claim 11, wherein, The second segment of the second spacer portion has at least one positioning portion for cooperating with a bus member.

13. The battery cell according to claim 11 or 12, characterized in that The second segment of the first spacer portion has at least one first limiting portion, which is in concave-convex cooperation with the first extension and the second extension to limit the freedom degree of the first extension and the second extension along the third direction.

14. The battery cell of any one of claims 2-13, wherein, The battery monomer further comprises a fixing member, which is at least partially arranged on the side of the first electrode terminal and the second electrode terminal away from the shell, and the fixing member is connected with the shell.

15. The battery cell of claim 14, wherein, The battery monomer comprises an insulating member, which is at least partially arranged between the electrode terminal and the fixing member.

16. The battery cell of claim 15, wherein, The insulating member is at least partially arranged on the outer periphery of the fixing member.

17. The battery cell of any one of claims 2-13, wherein, The first electrode terminal further comprises a first adapter connected with the first main body portion and the tab respectively, and the projection of the first reinforcing portion along the third direction at least partially coincides with the first adapter, and the third direction is perpendicular to the first direction and the second direction.

18. The battery cell of claim 17, wherein, The first adapter comprises a first connecting portion and a first body, the first body is arranged in the shell and connected with the tab, and the first connecting portion is at least partially arranged in the shell and connects the first main body portion and the first body. The second adapter comprises a second connecting portion and a second body, the second body is arranged in the shell and connected with the tab, and the second connecting portion is at least partially arranged in the shell and connects the second main body portion and the second body.

19. The battery cell of claim 18, wherein, The battery monomer further comprises an insulating sealing ring, which is respectively sleeved on the outer side of the first connecting portion and the second connecting portion.

20. The battery cell of any one of claims 1-19, wherein, The reinforcing portion at least partially extends to the side of the main body portion facing the shell.

21. The battery cell of any one of claims 1-20, wherein, The extension part is formed with a mounting groove on one side of the shell, and the reinforcing part is at least partially arranged in the mounting groove.

22. The battery cell of any one of claims 1-21, wherein, The thickness W of the reinforcing part satisfies 0.1mm≤W≤1mm.

23. The battery cell of any one of claims 1-22, wherein, The reinforcing part is connected to the extension part by thermal compounding, or the reinforcing part is arranged between the extension part and the shell.

24. The battery cell of any one of claims 1-23, wherein, The electrode terminal is a positive electrode terminal, the reinforcing part is a copper layer, and the strength of the reinforcing part is greater than that of the extension part.

25. A cover plate assembly characterized by, The electrode terminal of the battery cell as claimed in any one of claims 1-24 is arranged in the cover plate assembly.

26. A battery device, characterized by Comprising: A plurality of battery cells as claimed in any one of claims 1-24.

27. The battery cell of claim 26, wherein, Further comprising a busbar electrically connected to the extension part of the corresponding battery cell.

28. An electrical device, comprising: Comprising: The battery cell as claimed in any one of claims 1-24 or the battery device as claimed in claim 26 is used for storing or providing electric energy.

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