Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment. The battery includes a battery cell including a housing and an electrode terminal, and a bus member. The shell is provided with a first wall, the electrode terminal is arranged on the first wall, the confluence component is connected to the electrode terminal, and the confluence component is used for realizing electric connection of a plurality of battery monomers. Wherein the bus member is provided with an accommodating part, and at least a part of the electrode terminal is accommodated in the accommodating part. Therefore, the electrode terminal and the confluence component can share a part of space along the thickness direction of the first wall, the space utilization rate is improved, and the energy density of the battery is improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are being used more and more widely. Batteries have high energy density, high reliability, long service life, and are green and environmentally friendly to the social environment. They have been widely used in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swap stations, engineering manufacturing, smart equipment, etc. At the same time, they also promote technical development and research in communication terminals, medical equipment, energy development, etc.

[0003] In the development of battery technology, how to improve the energy density of batteries is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device that can effectively improve the energy density of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising a battery cell and a busbar component, wherein the battery cell comprises a housing and an electrode terminal, the housing having a first wall, and the electrode terminal being arranged on the first wall; the busbar component is connected to the electrode terminal, and the busbar component is used to realize electrical connection of a plurality of the battery cells; wherein the busbar component is provided with a housing portion, and at least a portion of the electrode terminal is accommodated in the housing portion.

[0006] In the above technical solution, the busbar component is provided with a housing portion. By accommodating at least a portion of the electrode terminal in the housing portion, the electrode terminal and the busbar component can share a portion of space along the thickness direction of the first wall, thereby improving space utilization and battery energy density.

[0007] In some embodiments, along the thickness direction of the first wall, the conduit component has a first surface facing the first wall and a second surface away from the first wall, and the accommodation portion is a through hole penetrating the first surface and the second surface.

[0008] In the above technical solution, the accommodating portion is a through hole, which not only reduces the difficulty of preparing the busbar component, but also, along the thickness direction of the first wall, the electrode terminal and the busbar component can maximize the shared space and reduce the size occupied in the thickness direction of the first wall.

[0009] In some embodiments, the electrode terminal includes a conductive member and a pole, the conductive member is disposed on the outside of the first wall, the pole is connected to the conductive member, and at least a portion of the conductive member is accommodated in the through hole.

[0010] In the above technical solution, the conductive member is conducive to the uniform distribution of current and improving the installation stability of the terminal post. At least a part of the conductive member is received in the through hole, so that the conductive member and the bus bar component share a part of the space, thereby realizing that the electrode terminal and the bus bar component share a part of the space.

[0011] In some embodiments, the hole wall of the through hole is welded to the conductive member to form a welded portion, and at least a part of the welded portion is exposed on the second surface.

[0012] In the above technical solution, the receiving portion is a through hole, and the receiving portion of this structure allows the bus bar component and the conductive member to be seam welded, improving the connection stability between the bus bar component and the conductive member.

[0013] In some embodiments, along the thickness direction of the first wall, the conductive member has a third surface facing away from the first wall, and the second surface is flush with the third surface.

[0014] In the above technical solution, the second surface is flush with the third surface, and the bus bar component does not exceed the conductive member in the thickness direction of the first wall, which not only does not increase the size of the battery cell in the thickness direction of the first wall, but also can improve the interface consistency.

[0015] In some embodiments, the conductive member includes a main body and a boss, the boss is disposed on a side of the main body facing away from the first wall, at least a part of the boss is received in the receiving portion, and along the thickness direction of the first wall, the bus bar component abuts against the main body.

[0016] In the above technical solution, the bus bar component abuts against the main body, and the main body can provide support for the bus bar component, improving the structural stability of the battery.

[0017] In some embodiments, along the direction away from the main body, along the thickness direction of the first wall and away from the interior of the housing, the cross-sectional area of the boss gradually decreases.

[0018] In the above technical solution, along the direction away from the main body, the cross-sectional area of the boss gradually decreases, making it easy for the boss to be received in the receiving portion and greatly reducing the assembly difficulty between the bus bar component and the conductive member.

[0019] In some embodiments, along the thickness direction of the first wall and away from the interior of the housing, the aperture of the through hole gradually decreases.

[0020] In the above technical solution, the shape of the through hole is adapted to the shape of the boss, the gap between the through hole and the boss can be smaller, and the mutual cooperation and limitation between the boss and the through hole can improve the structural stability of the battery.

[0021] In some embodiments, the hole wall of the through hole is welded to the outer peripheral surface of the boss.

[0022] In the above technical solution, the hole wall of the through hole is welded to the outer peripheral surface of the boss, reducing the requirement for welding energy. A device with a smaller welding power can achieve the welding of the busbar component and the conductive member.

[0023] In some embodiments, the battery cell further includes a protective member and a first insulating member. The first insulating member is disposed between the first wall and the conductive member to insulate the conductive member from the first wall. Along the thickness direction of the first wall, at least a part of the protective member is disposed between the first insulating member and the conductive member, and the melting point of the protective member is greater than the melting point of the conductive member.

[0024] In the above technical solution, by disposing the protective member between the first insulating member and the conductive member, and the melting point of the protective member is greater than the melting point of the conductive member, during the welding process of the conductive member and the busbar component, the protective member is not easily welded through, alleviating the burning and deformation of the first insulating member, reducing the risk of failure of the first insulating member, and improving the reliability of the battery cell.

[0025] In addition, by providing the protective member, the thickness of the conductive member can be made smaller, reducing the space occupied by the conductive member in the thickness direction of the first wall and improving the energy density of the battery cell.

[0026] In some embodiments, the melting point of the protective member is between 1000°C and 3000°C.

[0027] In the above technical solution, a protective member with a higher melting point can be obtained, improving the protection effect and further reducing the risk of insulation failure of the first insulating member.

[0028] In some embodiments, the material of the protective member includes one of steel, zinc, and copper, and the material of the conductive member includes aluminum.

[0029] In the above technical solution, the material of the protective member includes one of steel, zinc, and copper. These metal materials make the protective member have a relatively high melting point, and the protective member is not easily welded through, thereby improving the protection effect of the protective member on the first insulating member. The material of the conductive member includes aluminum, which can greatly improve the conductivity of the conductive member, and the melting point of aluminum is relatively low, facilitating the connection of the conductive member to the busbar component by welding to improve the connection stability between the conductive member and the busbar component.

[0030] In some embodiments, along the thickness direction of the first wall, the thickness of the protective member is H 1 , and the thickness of the conductive member is H 2 , satisfying 1 / 10 ≤ H 1 / H 2 ≤ 1 / 4.

[0031] In the above technical solution, 1 / 10 ≤ H 1 / H 2 , compared with the conductive member, the thickness H 1 of the protective member will not be too small, so that the protective member can reduce and relieve the risk of failure of the first insulating member. H 1 / H 2 ≤ 1 / 4. Compared with the conductive member, the thickness H 1 of the protective member will not be too large. Along the thickness direction of the first wall, the size of the protective member occupies a small space, and the influence on the energy density of the battery cell is small. Therefore, 1 / 10 ≤ H 1 / H 2 ≤ 1 / 4 can take into account both the energy density and reliability of the battery cell.

[0032] In some embodiments, along the thickness direction of the first wall, the thickness H 1 of the protective member satisfies 0.3 mm ≤ H 1 ≤ 1 mm.

[0033] In the above technical solution, 0.3 mm ≤ H 1 , the thickness H 1 of the protective member will not be too small, and the protective member is not easily penetrated by welding. H 1 ≤ 1 mm, the thickness H 1 of the protective member will not be too large. Along the thickness direction of the first wall, the size of the protective member occupies a small space, and the influence on the energy density of the battery cell is small. Therefore, 0.3 mm ≤ H 1 ≤ 1 mm can take into account both the energy density and reliability of the battery cell.

[0034] In some embodiments, 0.5 mm ≤ H 1 ≤ 0.8 mm.

[0035] In the above technical solution, it can further take into account both the energy density and reliability of the battery cell and improve the performance of the battery cell.

[0036] In some embodiments, along the thickness direction of the first wall, the thickness H 2 of the conductive member satisfies 1 mm ≤ H 2 ≤ 2.5 mm.

[0037] In the above technical solution, 1 mm ≤ H 2 , so that the thickness H 2 of the conductive member will not be too small, and there is enough penetration depth when the conductive member is welded to the busbar component, ensuring the connection stability between the conductive member and the busbar component. H 2 ≤ 2.5 mm, so that the thickness H 2It won't be too large. Along the thickness direction of the first wall, the size of the conductive part occupies a small space, and the internal space of the battery cell can be larger to accommodate larger electrochemical components, improving the energy density of the battery cell. Therefore, 1mm ≤ H 2 ≤ 2.5mm, which can balance the energy density and reliability of the battery cell.

[0038] In some embodiments, 1.5mm ≤ H 2 ≤ 2mm.

[0039] In the above technical solution, it is possible to further balance the energy density and reliability of the battery cell and improve the performance of the battery cell.

[0040] In some embodiments, the conductive part has a fourth surface facing the first insulating part, and the protective part is a coating provided on the fourth surface.

[0041] In the above technical solution, the number of components is simplified, and there is no need to separately assemble the protective part during the assembly process of the battery cell, thereby improving the assembly efficiency of the battery cell.

[0042] In some embodiments, the protective part is connected to the conductive part; or, the protective part is connected to the first insulating part.

[0043] In the above technical solution, the combination of the protective part connected to the conductive part or the first insulating part can be used as a prefabricated part. The protective part is separated from the assembly process of the battery cell, and there is no need to separately assemble the protective part during the assembly process of the battery cell, thereby improving the assembly efficiency of the battery cell.

[0044] In some embodiments, the first insulating part is a plastic part, and the plastic part is injection-molded on the protective part.

[0045] In the above technical solution, on the one hand, the combination of the plastic part injection-molded on the protective part is an injection-molded part. This injection-molded part can be used as a prefabricated part. The protective part is separated from the assembly process of the battery cell, and there is no need to separately assemble the protective part during the assembly process of the battery cell, thereby improving the assembly efficiency of the battery cell. On the other hand, the plastic part is injection-molded on the protective part, and the process is mature, which can greatly reduce the production cost.

[0046] In some embodiments, the protective part is provided with a limiting part, and the first insulating part is provided with a cooperating part that cooperates with the limiting part.

[0047] In the above technical solution, by restricting the movement of the protective part through the limiting part and the cooperating part, the risk of the protective part moving relative to the first insulating part can be reduced, thereby reducing the risk of the protective part failing to provide protection.

[0048] In some embodiments, the limiting part is a convex part, and the cooperating part is a concave part.

[0049] In the above technical solution, the cooperation between the convex part and the concave part is adopted to limit the movement of the protective part relative to the first insulating part.

[0050] In some embodiments, the convex part is arranged at the edge of the protective part, and a plurality of convex parts are arranged. The plurality of convex parts are arranged at intervals along the circumferential direction of the protective part; the first insulating part has a fifth surface facing the protective part, and a plurality of convex ribs are arranged on the fifth surface. The plurality of convex ribs are arranged at intervals around the protective part, and each convex rib extends along the circumferential direction of the protective part. A concave part is formed between two adjacent convex ribs.

[0051] In the above technical solution, the convex ribs can improve the structural strength of the first insulating part, and a concave part is formed between two adjacent convex ribs to cooperate with the convex part to limit the movement of the protective part.

[0052] In some embodiments, the first insulating part includes a bottom wall and a side wall surrounding the bottom wall. The convex ribs are arranged at the connection between the bottom wall and the side wall, and the surface of the bottom wall facing the protective part is the fifth surface.

[0053] In the above technical solution, the convex ribs are arranged at the connection between the bottom wall and the side wall, that is, the convex ribs are arranged close to the side wall, which can reduce the occupation of the middle area of the bottom wall.

[0054] In some embodiments, the first insulating part includes a bottom wall and a side wall surrounding the bottom wall. At least a part of the protective part is arranged between the bottom wall and the conductive part. Along the thickness direction of the first wall, the thickness of the protective part is H 1 , and the thickness of the bottom wall is H 3 , satisfying 1 / 10 ≤ H 1 / H 3 ≤ 1 / 2.

[0055] In the above technical solution, 1 / 10 ≤ H 1 / H 3 , compared with the bottom wall, the proportion of the thickness H 1 of the protective part is not too small, so that the protective part can reduce and alleviate the risk of failure of the first insulating part. H 1 / H 3 ≤ 1 / 2, compared with the bottom wall, the proportion of the thickness of the protective part is not too large. Along the thickness direction Z of the first wall, the size of the protective part occupies a small area and has little influence on the energy density of the battery cell. Therefore, 1 / 10 ≤ H 1 / H 3 ≤ 1 / 2 can take into account the energy density and reliability of the battery cell.

[0056] In some embodiments, the busbar component is welded to the conductive member to form a welded portion, and the busbar component is used to realize the electrical connection of a plurality of battery cells; along the thickness direction of the first wall, the projection of the welded portion falls within the projection of the protective member.

[0057] In the above technical solution, by making the projection of the welded portion fall within the projection of the protective member, in this way, along the thickness direction of the first wall, the protective member is located between the welded portion and the first insulating member, which can effectively reduce the risk of failure of the first insulating member caused by the welding of the conductive member and the busbar component.

[0058] In some embodiments, along the thickness direction of the first wall, the thickness of the busbar component is H 4 , and the thickness of the conductive member is H 2 , satisfying 1 / 3 ≤ H 4 / H 2 <1.

[0059] In the above technical solution, 1 / 3 ≤ H 4 / H 2 , the thickness ratio of the busbar component is not too small, so that the busbar component has higher structural strength. H 4 / H 2 <1, the thickness ratio of the busbar component is not too large, leaving more space for the conductive member, allowing a larger-sized conductive member to be accommodated, thereby improving the structural strength of the conductive member. Therefore, 1 / 3 ≤ H 4 / H 2 <1 can take into account the structural strengths of both the busbar component and the conductive member.

[0060] In some embodiments, the housing includes a housing body and an end cap. One end of the housing body forms an opening, and the end cap covers the opening. The end cap is the first wall.

[0061] In a second aspect, an embodiment of the present application provides an electrical device, which includes the battery provided in the first aspect embodiment, and the battery is used to supply power to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0063] Figure 1 is a schematic structural diagram of some embodiments of the present application;

[0064] Figure 2Exploded view of the battery according to some embodiments of the present application;

[0065] Figure 3 Schematic structural view of the battery according to some embodiments of the present application;

[0066] Figure 4 Exploded view of the battery cell according to some embodiments of the present application;

[0067] Figure 5 Assembly schematic diagram of the battery cell and the busbar component according to some embodiments of the present application;

[0068] Figure 6 Assembly schematic diagram of the first wall, the electrode terminal and the busbar component according to some embodiments of the present application;

[0069] Figure 7 Is Figure 5 Partial cross-sectional view along C-C;

[0070] Figure 8 Is Figure 7 Partial structural view of the busbar component in

[0071] Figure 9 Is Figure 7 Partial structural view of some other embodiments of the busbar component in

[0072] Figure 10 Is Figure 7 Schematic diagram of the welding of the busbar component and the conductive part in some embodiments of

[0073] Figure 11 Is Figure 7 Schematic diagram of the welding of the busbar component and the conductive part in some other embodiments of

[0074] Figure 12 Schematic structural view of the conductive part according to some embodiments of the present application;

[0075] Figure 13 Schematic structural view of the conductive part according to some other embodiments of the present application;

[0076] Figure 14 Schematic structural view of the conductive part and the busbar component according to an embodiment of the present application;

[0077] Figure 15 Schematic structural view of the protective part and the first insulating part according to some embodiments of the present application.

[0078] Icons: 100 - Battery; 10 - Battery cell; 11 - Outer shell; 111 - First wall; 111a - End cap; 112 - Housing; 12 - Electrode assembly; 13 - Electrode terminal; 131 - Conductive part; 1311 - Fourth surface; 1312 - Third surface; 1313 - Body; 1314 - Boss; 1315 - Third mounting hole; 132 - Terminal post; 14 - Protective part; 141 - Limiting part; 142 - First mounting hole; 15 - First insulating part; 151 - Bottom wall; 152 - Side wall; 153 - Fifth surface; 154 - Rib; 1541 - Fitting part; 155 - Second mounting hole; 16 - Second insulating part; 17 - Sealing part; 20 - Box body; 21 - First part; 22 - Second part; 23 - Accommodating space; 30 - Bus bar component; 31 - First surface; 32 - Second surface; 33 - Accommodating part; 34 - Positioning hole; 40 - Welding part; 1000 - Vehicle; 200 - Motor; 300 - Controller; Z - Thickness direction.

[0079] The drawings are not drawn to scale. Detailed implementation manners

[0080] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0081] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary - secondary relationship.

[0082] Reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0083] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0084] In the description of the present application, it should be noted that unless otherwise stated, "a plurality of" means more than two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0085] In the present application, the term "or" is merely a description of the association relationship of the associated objects, indicating that there can be two relationships. For example, A or B can mean: the two situations of existing A alone and existing B alone.

[0086] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device are only for illustrative purposes and should not constitute any limitation to the present application.

[0087] The "a plurality of" that appears in the present application refers to more than two (including two).

[0088] In the present application, the battery cell may include, but is not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc. The battery cell includes, but is not limited to, cylinders, flat bodies, cuboids, or other shapes, etc. The battery cell generally includes cylindrical battery cells, square battery cells, etc. in a packaged manner.

[0089] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. Metal ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode, which can prevent the positive electrode sheet and the negative electrode sheet from short-circuiting to a certain extent, while allowing active ions to pass through.

[0090] The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear.

[0091] Taking lithium-ion batteries as an example, the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0092] The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode tab.

[0093] The negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium may be used. The negative electrode active material may be carbon or silicon.

[0094] In order to ensure that a large current does not melt to a certain extent, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly can be a winding structure or a laminated structure.

[0095] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc. Generally, a battery includes a box body for encapsulating one or more battery cells. The box body can reduce the influence of liquid or other foreign matters on the charging or discharging of the battery cells.

[0096] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0097] In some embodiments, the battery may be a battery pack. The battery pack includes a box body and battery cells, and the battery cells or battery modules are accommodated in the box body.

[0098] In some embodiments, multiple battery cells may first be integrated into at least one battery module, and then the battery module is installed in the box body to form a battery pack form. In this embodiment, auxiliary structural members such as crossbeams may be provided between the battery modules to improve the installation stability of the battery modules in the box body.

[0099] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body may become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0100] In some embodiments, the battery may be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0101] The development of battery technology needs to consider various design factors at the same time. For example, performance parameters such as reliability, cycle life, discharge capacity, charge and discharge rate, etc. In addition, the energy density of the battery also needs to be considered.

[0102] In battery technology, a busbar component is connected to the electrode terminal to realize the electrical connection of multiple battery cells. The presence of the busbar component occupies space. Especially in batteries with high demand for overcurrent capacity, the size of the busbar component is larger and the occupied space is larger, resulting in a decrease in the energy density of the battery. For example, usually the busbar component is arranged above the electrode terminal, and the busbar component occupies space above the electrode terminal, reducing the space left inside the battery cell, resulting in a decrease in the energy density of the battery.

[0103] In view of this, to solve the problem that the busbar component occupies space and causes a decrease in the energy density of the battery, the embodiments of the present application provide a technical solution. In this technical solution, the electrode terminal is arranged on the first wall of the housing, and the busbar component is provided with a receiving portion. By making at least a part of the electrode terminal be received in the receiving portion, along the thickness direction of the first wall, the electrode terminal and the busbar component can share a part of the space, improving the space utilization rate and thus increasing the energy density of the battery.

[0104] The technical solutions disclosed in the embodiments of the present application are applicable to, but not limited to, batteries and electrical equipment using batteries.

[0105] The electrical equipment may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator and a planer, etc.

[0106] For the convenience of description, the following embodiments take the electrical equipment as the vehicle 1000 as an example for illustration.

[0107] Please refer to Figure 1 , Figure 1 which is a schematic structural view of the vehicle 1000 according to some embodiments of the present application. A battery 100 is disposed inside the vehicle 1000. The battery 100 may be disposed at the bottom, head or tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000.

[0108] The vehicle 1000 may further include a controller 300 and a motor 200. The controller 300 is used to control the battery 100 to supply power to the motor 200. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0109] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0110] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 2 which is an exploded view of the battery 100 according to some embodiments of the present application, Figure 3 and

[0111] In some embodiments, the battery 100 may further include a busbar component 30. The plurality of battery cells 10 can be electrically connected through the busbar component 30 to achieve series connection, parallel connection, or hybrid connection of the plurality of battery cells 10.

[0112] The busbar component 30 is a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0113] In some embodiments, the battery 100 may further include a housing 20. The housing 20 is used to accommodate the battery cells 10. The housing 20 may include a first part 21 and a second part 22. The first part 21 and the second part 22 are covered with each other to define an accommodation space 23 for accommodating the battery cells 10. Of course, the connection between the first part 21 and the second part 22 can be sealed through a sealing element (not shown in the figure). The sealing element can be a sealing ring, sealant, etc.

[0114] Among them, the first part 21 and the second part 22 can be in various shapes, such as a cuboid, a cylinder, etc. The first part 21 can be a hollow structure with one side open, and the second part 22 can also be a hollow structure with one side open. The open side of the second part 22 is covered on the open side of the first part 21, then the housing 20 with the accommodation space 23 is formed. Of course, it can also be that the first part 21 is a hollow structure with one side open, and the second part 22 is a plate-like structure. The second part 22 is covered on the open side of the first part 21, then the housing 20 with the accommodation space 23 is formed.

[0115] Please refer to Figure 4 , Figure 4 which is an exploded schematic view of the battery cell 10 according to some embodiments of the present application. The battery cell 10 may include a housing 11, an electrode assembly 12, an electrode terminal 13, and other functional components.

[0116] In some embodiments, the housing 11 can be a sealed structure or a non-sealed structure. As an example, when the housing 11 is a sealed structure, the housing 11 can play a role in protecting the electrode assembly 12 and to a certain extent preventing, such as electrolyte leakage, etc. When the housing is a non-sealed structure, the housing can play a role in protecting the electrode assembly. A sealing bag (not shown in the figure) may further be included between the housing 11 and the electrode assembly 12. The sealing bag is used to package the electrode assembly and the electrolyte, etc. Specifically, the sealing bag can be a bag-shaped insulating part or an aluminum-plastic film.

[0117] The housing 11 includes a housing body 112 and an end cap 111a. The housing body 112 is a component for accommodating the electrode assembly 12. The housing body 112 can be a hollow structure with an opening formed at one end, or a hollow structure with openings at both ends. The material of the housing body 112 can be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The housing body 112 can be in various shapes, such as a cylinder, a cuboid, etc. Exemplarily, in Figure 3 the housing body 112 is a cuboid.

[0118] The end cap 111a is a component that covers the opening of the housing body 112 to isolate the internal environment of the battery cell 10 from the external environment. The end cap 111a covers the opening of the housing body 112, and the end cap 111a and the housing body 112 together define a sealed space for accommodating the electrode assembly 12, the electrolyte, and other functional components. The shape of the end cap 111a can be adapted to the shape of the housing body 112. For example, if the housing body 112 is a cuboid structure, the end cap 111a is a rectangular plate-like structure adapted to the housing body 112. Another example is that if the housing body 112 is a cylinder structure, the end cap 111a is a circular plate-like structure adapted to the housing body 112. The material of the end cap 111a can also be various. Exemplarily, the end cap 111a can be made of a metal material, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 111a can be the same as or different from the material of the housing body 112.

[0119] In the battery cell 10, the end cap 111a can be one or two. If the housing body 112 is a hollow structure with an opening formed at one end, then one end cap 111a is correspondingly provided; if the housing body 112 is a hollow structure with openings formed at both ends, then two end caps 111a are correspondingly provided, and the two end caps 111a respectively cover the two openings of the housing body 112.

[0120] In some embodiments, two electrode terminals 13 can be provided. The two electrode terminals 13 can be provided on the same end cap 111a, or can be respectively provided on two end caps 111a.

[0121] The embodiment of the present application provides a battery 100, which can improve the energy density of the battery 100. The specific structure of the battery 100 will be elaborated in detail below with reference to the accompanying drawings.

[0122] Figure 5 is an assembly schematic diagram of the battery cell 10 and the bus bar component 30 according to some embodiments of the present application; Figure 6 is an assembly schematic diagram of the first wall 111, the electrode terminal 13 and the bus bar component 30 according to some embodiments of the present application; Figure 7 is Figure 5 a partial cross-sectional view along C-C; Figure 8 is Figure 7 a partial structural schematic diagram of the bus bar component 30 in Figure 9For Figure 7 Partial structural schematic diagram of some other embodiments of the middle busbar component 30.

[0123] Referring to Figures 5 to 9 , an embodiment of the present application provides a battery 100. The battery 100 includes battery cells 10 and a busbar component 30. The battery cell 10 includes a housing 11 and electrode terminals 13. The housing 11 has a first wall 111, and the electrode terminals 13 are disposed on the first wall 111. The busbar component 30 is connected to the electrode terminals 13, and the busbar component 30 is used to realize the electrical connection of multiple battery cells 10. Among them, the busbar component 30 is provided with a receiving portion 33, and at least a part of the electrode terminal 13 is received in the receiving portion 33.

[0124] The first wall 111 may be an end cap 111a, or the first wall 111 may also be other wall portions of the housing 112. For example, the first wall 111 is a wall portion of the housing 112 opposite to the end cap 111a. Optionally, the first wall 111 is the end cap 111a.

[0125] The electrode terminal 13 is a component or assembly for leading out current. The electrode terminal 13 may be a positive terminal or a negative terminal.

[0126] The receiving portion 33 is an area or space on the busbar component 30 for receiving at least a part of the electrode terminal 13. The receiving portion 33 may be formed by later cutting, stamping, or drilling of the busbar component 30, or the receiving portion 33 may be formed simultaneously when the busbar component 30 is molded, saving later processing.

[0127] The receiving portion 33 may be configured as circular, rectangular, irregular, etc. As long as it can satisfy receiving at least a part of the conductive member 131. The receiving portion 33 may match the shape of the structure of the conductive member 131 received in the receiving portion 33.

[0128] The busbar component 30 has a first surface 31 facing the first wall 111 and a second surface 32 facing away from the second wall. The receiving portion 33 may have one opening, or the receiving portion 33 may have multiple openings. At least one opening of the receiving portion 33 is located on the first surface 31 to receive at least a part of the conductive member 131.

[0129] Exemplarily, as Figure 9 shown, the groove formed by the first surface 31 recessing towards the second surface 32 is the receiving portion 33. The receiving portion 33 has one opening, and this opening is located on the first surface 31. It can be understood that the receiving portion 33 penetrates the first surface 31.

[0130] Exemplarily, as Figure 8 shown, the receiving portion 33 penetrates the first surface 31 and the second surface 32. The receiving portion 33 has two openings, and the two openings are respectively located on the first surface 31 and the second surface 32.

[0131] Of course, in other embodiments, the busbar component 30 has a side surface connecting the first surface 31 and the second surface 32, and the accommodating portion 33 may further extend to the edge of the busbar component 30, that is, at least one opening of the accommodating portion 33 is located on the side surface.

[0132] In this embodiment, the busbar component 30 is provided with the accommodating portion 33. By accommodating at least a part of the electrode terminal 13 in the accommodating portion 33, along the thickness direction Z of the first wall 111, the electrode terminal 13 and the busbar component 30 can share a part of the space, improving the space utilization rate and the energy density of the battery 100.

[0133] Refer to Figure 8 , in some embodiments, along the thickness direction Z of the first wall 111, the busbar component 30 has a first surface 31 facing the first wall 111 and a second surface 32 facing away from the first wall 111, and the accommodating portion 33 is a through hole penetrating the first surface 31 and the second surface 32.

[0134] The through hole can be configured as a round hole, a rectangular hole, a trapezoidal hole, etc.

[0135] The accommodating portion 33 being a through hole not only reduces the manufacturing difficulty of the busbar component 30, but also, along the thickness direction Z of the first wall 111, the electrode terminal 13 and the busbar component 30 can share the space maximally, reducing the size occupation in the thickness direction Z of the first wall 111.

[0136] In order to facilitate the positioning of the busbar component 30 and identify the installation position of the busbar component 30, refer to Figure 9 , in some embodiments, the accommodating portion 33 is a groove formed on the first surface 31, and a positioning hole 34 is further provided at the bottom of the groove. Along the direction perpendicular to the thickness direction Z of the first wall 111, the projection of the positioning hole 34 and the projection of the pole are at least partially overlapped. In this way, the pole 132 can be observed through the positioning hole 34, which is convenient for identifying and judging whether the busbar component 30 and the electrode terminal 13 are installed in place.

[0137] Different from Figure 9 is that in Figure 8 , the accommodating portion 33 is a through hole, and the through hole can not only function as the accommodating portion 33, but also function as the positioning hole 34. The number of openings of the busbar component 30 is reduced.

[0138] In some embodiments, the electrode terminal 13 includes a conductive member 131 and a pole 132. The conductive member 131 is disposed outside the first wall 111, the pole 132 is connected to the conductive member 131, and at least a part of the conductive member 131 is accommodated in the through hole.

[0139] The conductive member 131 can be understood as a conductive metal member, which is used to mount the terminal post 132. The conductive member 131 is used to connect the terminal post 132 and the first wall 111 to fix the terminal post 132 to the first wall 111. The conductive member 131 can be configured in any shape. The material of the conductive member 131 can include but is not limited to copper, aluminum, steel, and their alloys, etc.

[0140] The terminal post 132 can be used for electrically connecting with the tab of the electrode assembly 12. The materials of the terminal post 132 and the conductive member 131 can be the same or different. In some embodiments, at least a part of the terminal post 132 can also be received in the receiving portion 33.

[0141] Optionally, the conductive member 131 is a riveting block, and the terminal post 132 is riveted to the conductive member 131.

[0142] In this embodiment, the conductive member 131 is beneficial to the uniform distribution of current and improves the mounting stability of the terminal post 132. At least a part of the conductive member 131 is received in the through hole, so that the conductive member 131 and the busbar component 30 share a part of the space, thereby realizing that the electrode terminal 13 and the busbar component 30 share a part of the space.

[0143] In some embodiments, the conductive member 131 is welded to the busbar component 30 to improve the connection stability between the conductive member 131 and the busbar component 30.

[0144] Figure 10 For Figure 7 the schematic diagram of the welding of the busbar component 30 and the conductive member 131 in some embodiments, Figure 11 For Figure 7 the schematic diagram of the welding of the busbar component 30 and the conductive member 131 in some other embodiments.

[0145] Referring to Figure 10 and Figure 11 , in some embodiments, the hole wall of the through hole is welded to the conductive member 131 to form a welding portion 40, and at least a part of the welding portion 40 is exposed on the second surface 32.

[0146] The hole wall of the through hole can be understood as the inner circumferential surface of the receiving portion 33.

[0147] The welding methods include but are not limited to penetration welding, butt welding, etc. Optionally, as Figure 10 shown, the busbar component 30 and the conductive member 131 are butt-welded.

[0148] In this embodiment, the receiving portion 33 is a through hole, and this structure of the receiving portion 33 allows the busbar component 30 and the conductive member 131 to be butt-welded, improving the connection stability between the busbar component 30 and the conductive member 131.

[0149] In some embodiments, along the thickness direction Z of the first wall 111, the conductive member 131 has a third surface 1312 facing away from the first wall 111, and the second surface 32 does not extend beyond the third surface 1312. In this way, based on the conductive member 131, the current collecting member 30 does not additionally occupy space in the thickness direction Z of the first wall 111, which is beneficial to improving the energy density of the battery 100.

[0150] In some embodiments, along the thickness direction Z of the first wall 111, the conductive member 131 has a third surface 1312 facing away from the first wall 111, and the second surface 32 is flush with the third surface 1312.

[0151] Understandably, the second surface 32 and the third surface 1312 are coplanar.

[0152] The second surface 32 is flush with the third surface 1312, and the current collecting member 30 does not extend beyond the conductive member 131 in the thickness direction Z of the first wall 111. This not only does not increase the size of the battery cell 10 in the thickness direction Z of the first wall 111, but also improves the interface consistency.

[0153] Figure 12 Schematic diagram of the structure of the conductive member 131 according to some embodiments of the present application; Figure 13 Schematic diagram of the structure of the conductive member 131 according to other embodiments of the present application.

[0154] Refer to Figure 12 、 Figure 13 And with reference to Figure 7 In some embodiments, the conductive member 131 includes a main body 1313 and a boss 1314. The boss 1314 is disposed on the side of the main body 1313 facing away from the first wall 111. At least a part of the boss 1314 is received in the receiving portion 33. Along the thickness direction Z of the first wall 111, the current collecting member 30 abuts against the main body 1313.

[0155] The boss 1314 may extend to the edge of the main body 1313, or the boss 1314 may not extend to the edge of the main body 1313 (as shown in Figure 13 ), or the boss 1314 may be partially extended to the edge of the main body 1313 (as shown in Figure 12 ). The shapes of the boss 1314 and the main body 1313 can be various. Exemplarily, the boss 1314 is trapezoidal.

[0156] In this embodiment, the current collecting member 30 abuts against the main body 1313, and the main body 1313 can provide support for the current collecting member 30, improving the structural stability of the battery 100.

[0157] In other embodiments, the main body 1313 may not be provided to support the current collecting member 30. Refer to Figure 14 , Figure 14Schematic diagram of the structure of the conductive member 131 and the conduit component 30 of the embodiment of the present application. In some embodiments, the conduit component 30 is directly arranged around the outer periphery of the conductive member 131. The conductive member 131 can be a rectangular parallelepiped, a trapezoid, etc. The conductive member 131 has a side surface connecting the first surface 31 and the second surface 32. If the guide member is a rectangular parallelepiped, the side surface of the conductive member 131 is a straight surface. If the guide member is a trapezoid (such as Figure 14 As shown), the side surface of the conductive member 131 is an inclined surface.

[0158] Reference Figure 7 In some embodiments, along the thickness direction Z of the first wall 111, the thickness of the conduit component 30 is H 4 , the thickness of the conductive part is H 2 , satisfying, 1 / 3≤H 4 / H 2 <1.

[0159] The thickness of the conduit member 30 is H 4 It can be understood as the distance at the maximum point of the conduit component along the thickness direction Z of the first wall 111 .

[0160] The thickness of the conductive member 131 is H 2 It can be understood as the maximum distance between the third surface 1312 and the surface of the body 1313 facing away from the boss 1314 along the thickness direction Z of the first wall 111 .

[0161] H 4 / H 2 is the thickness ratio of the busbar component 30 to the conductive member 131 .

[0162] For example, H 4 / H 2 It can be 1 / 3, 10 / 29, 10 / 27, 5 / 13, 2 / 5, 5 / 12, 1 / 2, 2 / 3, 1, etc., and any value in between.

[0163] 1 / 3≤H 4 / H 2 , the thickness of the conduit component 30 will not be too small, so that the conduit component 30 has a higher structural strength. 4 / H 2 <1, the thickness of the busbar component 30 will not be too large, leaving more space for the conductive member 131, allowing for a larger conductive member 131 to be accommodated, thereby improving the structural strength of the conductive member 131. Therefore, 1 / 3≤H 4 / H 2 <1 can take into account the structural strength of the busbar component 30 and the conductive member 131 .

[0164] Reference Figure 7, in some embodiments, along the thickness direction Z of the first wall 111, the thickness of the boss 1314 is H 5 , the thickness of the conductive member is H 2 , satisfying 1 / 3 ≤ H 4 / H 2 < 1

[0165] The thickness of the boss is H 4 It can be understood that along the thickness direction Z of the first wall 111, the maximum distance between the third surface 1312 and the body 1313 is H

[0166] H 5 / H 2 is the proportion of the thickness of the boss 1314 in the thickness of the conductive member 131

[0167] Exemplarily, H 4 / H 2 can be 1 / 3, 10 / 29, 10 / 27, 5 / 13, 2 / 5, 5 / 12, 1 / 2, 2 / 3, 1, etc., and any value therebetween

[0168] 1 / 3 ≤ H 5 / H 2 , the thickness of the boss 1314 is not too small, so that along the thickness direction Z of the first wall 111, the conductive member 131 can share space with the busbar component 30 as much as possible, improving the energy density of the battery 100. H 5 / H 2 < 1, the thickness of the boss 1314 is not too large, enabling the thickness of the body 1313 to be increased, thus providing strong support for the busbar component 30 and improving the structural stability of the battery 100. Therefore, 1 / 3 ≤ H 5 / H 2 < 1 can balance the energy density and structural stability of the battery 100

[0169] In some embodiments, along the thickness direction Z of the first wall 111, the thickness of the busbar component 30 and the thickness of the boss 1314 may be the same or different. Exemplarily, as Figure 7 shown, the thickness of the busbar component 30 is the same as the thickness of the boss 1314

[0170] In some embodiments, along the thickness direction Z of the first wall 111, the thickness of the busbar component 30 is between 0.5 mm and 3.5 mm. In this way, a busbar component 30 with a large overcurrent capacity but not too large thickness can be obtained

[0171] Exemplarily, the thickness of the current collecting member 30 may be 0.5 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, 2.4 mm, 2.5 mm, 2.7 mm, 2.8 mm, 3.1 mm, 3.4 mm, 3.5 mm, etc., and any value therebetween.

[0172] Furthermore, along the thickness direction Z of the first wall 111, the thickness of the current collecting member 30 is between 1.5 mm and 2.5 mm.

[0173] Exemplarily, the thickness of the current collecting member 30 may be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, etc., and any value therebetween.

[0174] In some embodiments, along the thickness direction Z of the first wall 111 and in the direction away from the interior of the housing 11, the cross-sectional area of the boss 1314 gradually decreases.

[0175] It can be understood that the boss 1314 gradually decreases in the direction away from the body 1313.

[0176] The cross-sectional area of the boss 1314 refers to the area of the cross-section of the boss 1314 perpendicular to the thickness direction Z of the first wall 111. If the boss 1314 is a cuboid, the cross-section is a rectangle, and the area of this rectangle is the cross-sectional area of the boss 1314. If the boss 1314 is a cylinder, the cross-section is a circle, and the area of this circle is the cross-sectional area of the boss 1314. If the boss 1314 is a trapezoid, the cross-section is a rectangle, and the area of this rectangle is the cross-sectional area of the boss 1314.

[0177] In this embodiment, the cross-sectional area of the boss 1314 gradually decreases in the direction away from the body 1313, so that the boss 1314 can be easily received in the receiving portion 33, and the assembly difficulty between the current collecting member 30 and the conductive member 131 is reduced to a great extent.

[0178] In some embodiments, along the thickness direction Z of the first wall 111 and in the direction away from the interior of the housing 11, the cross-sectional area of the boss 1314 gradually decreases, and the aperture of the through hole gradually decreases.

[0179] The shape of the through hole is adapted to the shape of the boss 1314, the gap between the through hole and the boss 1314 can be smaller, and the mutual cooperation and limitation between the boss 1314 and the through hole can improve the structural stability of the battery 100.

[0180] Refer to Figure 12 and Figure 13 and, with reference to Figure 10 and Figure 11, in some embodiments, in a direction away from the first wall 111, the cross-sectional area of the boss 1314 gradually decreases, the aperture of the through hole gradually decreases, and the hole wall of the through hole is welded to the outer peripheral surface of the boss 1314.

[0181] The outer peripheral surface of the boss 1314 can be understood as the side surface of the boss 1314.

[0182] It should be understood that, compared with the distance between the first surface 31 and the second surface 32 (the thickness of the bus bar component 30), the distance between the hole wall of the through hole and the second surface 32 is smaller, and at the position of the through hole, the material of the bus bar component 30 is thinner. Whether penetration welding or butt welding is used at this position, the welding depth requirement can be reduced. The welding of the bus bar component 30 to the conductive member 131 is not limited by the thickness of the bus bar component 30, allowing the bus bar component 30 to be made thicker to improve the current-carrying capacity.

[0183] The hole wall of the through hole is welded to the outer peripheral surface of the boss 1314, reducing the demand for welding energy, and a device with a smaller welding power can achieve the welding of the bus bar component 30 to the conductive member 131.

[0184] Referring to Figure 7 , Figure 10 and Figure 11 , in some embodiments, the battery cell 10 further includes a protective member 14 and a first insulating member 15. The first insulating member 15 is disposed between the first wall 111 and the conductive member 131 to insulate the conductive member 131 from the first wall 111; along the thickness direction Z of the first wall 111, at least a part of the protective member 14 is disposed between the first insulating member 15 and the conductive member 131, and the melting point of the protective member 14 is greater than the melting point of the conductive member 131.

[0185] The first insulating member 15 is a component that electrically insulates the conductive member 131 from the first wall 111 to prevent the battery cell 10 from short-circuiting or discharging accidentally. The material of the first insulating member 15 includes but is not limited to polyphenylene ether, polyphenylene sulfide, polycarbonate, resin, etc. Optionally, the first insulating member 15 is an upper plastic.

[0186] The protective member 14 is a component used to isolate the welding energy during the welding process of the conductive member 131 and the bus bar component 30, and protect the first insulating member 15 from being burned and deformed or less burned and deformed. It can be understood that the protective member 14 is prepared from a high-temperature-resistant material. The material of the protective member 14 can be metal or non-metal. The protective member 14 can be a coating plated on the surface of the conductive member 131 or the first insulating member 15, and the protective member 14 can also be a relatively independent component. The protective member 14 can be configured in any shape as long as it can protect the first insulating member 15 from being burned by the welding energy or less burned by the welding energy during the welding process of the bus bar component 30 and the conductive member 131.

[0187] The melting point of the protective member 14 is greater than that of the conductive member 131, which means that, compared with the conductive member 131, the protective member 14 is more heat-resistant and requires a higher temperature for the protective member 14 to soften and turn into a liquid state. Compared with the conductive member 131, the protective member 14 is not easily penetrated by the welding energy.

[0188] The melting point of the protective member 14 can be fixed or unfixed. If the melting point of the protective member 14 is fixed, the temperature at which the protective member 14 turns into a liquid state is the melting point of the protective member 14. If the melting point of the protective member 14 is unfixed, the minimum temperature at which the protective member 14 begins to soften within a certain temperature range can be regarded as the melting point of the protective member 14.

[0189] The material of the protective member 14 includes but is not limited to steel, zinc, copper and their alloys, etc., as long as it can meet the requirement that the melting point of the protective member 14 is higher than that of the conductive member 131.

[0190] The thickness direction Z of the first wall 111 can be a direction parallel to the welding direction, or the thickness direction Z of the first wall 111 can be a direction with a certain included angle with the welding direction. Optionally, the welding direction is the thickness direction Z of the first wall 111.

[0191] The protective member 14 can be partially disposed between the first insulating member 15 and the conductive member 131, or the protective member 14 can be entirely disposed between the first insulating member 15 and the conductive member 131. When welding the bus bar assembly 30 and the conductive member 131 along the welding direction, the part of the protective member 14 disposed between the first insulating member 15 and the conductive member 131 can relieve the transfer of the welding energy to the first insulating member 15 in the welding direction, thereby reducing the risk of the first insulating member 15 being burned and deformed.

[0192] In this embodiment, by disposing the protective member 14 between the first insulating member 15 and the conductive member 131, and the melting point of the protective member 14 is greater than that of the conductive member 131, during the welding process of the conductive member 131 and the bus bar assembly 30, the protective member 14 is not easily welded through, relieving the burning and deformation of the first insulating member 15, reducing the risk of the first insulating member 15 failing, and improving the reliability of the battery cell 10.

[0193] In addition, by disposing the protective member 14, the thickness of the conductive member 131 can be made smaller, reducing the space occupied by the conductive member 131 in the thickness direction Z of the first wall 111, and improving the energy density of the battery cell 10.

[0194] In some embodiments, the melting point of the protective member 14 is between 1000°C and 3000°C. This melting point is greater than the common welding temperature, enabling the protective member 14 with a higher melting point to be obtained, improving the protection effect, and further reducing the risk of the first insulating member 15 failing in insulation.

[0195] Exemplarily, the melting point of the protective member 14 can be 1000°C, 1200°C, 1500°C, 1700°C, 2000°C, 2100°C, 2500°C, 2800°C, 3000°C, etc., and any value therebetween.

[0196] In some embodiments, both the protective member 14 and the conductive member 131 are made of metal materials.

[0197] In some embodiments, the material of the protective member 14 includes one of steel, zinc, and copper, and the material of the conductive member 131 includes aluminum.

[0198] The material of the protective member 14 includes one of steel, zinc, and copper. These metal materials endow the protective member 14 with a relatively high melting point, making it not easily penetrated by welding, thereby improving the protection effect of the protective member 14 on the first insulating member 15. The material of the conductive member 131 includes aluminum, which can greatly improve the electrical conductivity of the conductive member 131. Moreover, the melting point of aluminum is relatively low, facilitating the connection of the conductive member 131 to the busbar component 30 by welding to enhance the connection stability between the conductive member 131 and the busbar component 30.

[0199] Refer to Figure 7 , in some embodiments, along the thickness direction Z of the first wall 111, the thickness of the protective member 14 is H 1 , and the thickness of the conductive member 131 is H 2 , satisfying 1 / 10 ≤ H 1 / H 2 ≤ 1 / 4.

[0200] If the protective member 14 is a coating, then H 1 can be understood as the thickness of the coating. If the protective member 14 is an independent component, then H 1 can be understood as the thickness of the component. The distance between the two surfaces of the protective member 14 along the thickness direction Z of the first wall 111 is H 1 , and the two surfaces of the protective member 14 along the thickness direction Z of the first wall 111 can be understood as two reference planes. If one of the reference planes has a groove, the distance between the area outside the groove of this reference plane and the other reference plane is H 1 ; if one of the reference planes has a protrusion, the distance between the area outside the protrusion of this reference plane and the other reference plane is H 1 .

[0201] H 2 is the distance between the two surfaces of the conductive member 131 along the thickness direction Z of the first wall 111. In the embodiment where the conductive member 131 is disposed on the top of the housing 11, the thickness H of the conductive member 131 2 can be understood as the height of the conductive member 131. In the embodiment where the conductive member 131 includes a main body 1313 and a boss 1314, H2 It can be understood as the sum of the thickness of the body 1313 and the thickness of the boss 1314.

[0202] H 1 / H 2 It can be understood as the thickness ratio of the protective member 14 to the conductive member 131.

[0203] Exemplarily, H 1 / H 2 can be 1 / 10, 1 / 9, 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, etc., and any value therebetween.

[0204] 1 / 10 ≤ H 1 / H 2 , compared with the conductive member 131, the thickness H 1 of the protective member 14 will not be too small, so that the protective member 14 can reduce and alleviate the risk of failure of the first insulating member 15. H 1 / H 2 ≤ 1 / 4, compared with the conductive member 131, the thickness H 1 of the protective member 14 will not be too large, along the thickness direction Z of the first wall 111, the size of the protective member 14 occupies less, and the influence on the energy density of the battery cell 10 is smaller. Therefore, 1 / 10 ≤ H 1 / H 2 ≤ 1 / 4 can balance the energy density and reliability of the battery cell 10.

[0205] In some embodiments, along the thickness direction Z of the first wall 111, the thickness H 1 of the protective member 14 satisfies 0.3 mm ≤ H 1 ≤ 1 mm.

[0206] Exemplarily, H 1 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc., and any value therebetween.

[0207] 0.3 mm ≤ H 1 , the thickness H 1 of the protective member 14 will not be too small, and the protective member 14 is not easily penetrated by welding. H 1 ≤ 1 mm, the thickness H 1 of the protective member 14 will not be too large, along the thickness direction Z of the first wall 111, the size of the protective member 14 occupies less, and the influence on the energy density of the battery cell 10 is smaller. Therefore, 0.3 mm ≤ H 1 ≤ 1 mm can balance the energy density and reliability of the battery cell 10.

[0208] In some embodiments, 0.5 mm ≤ H 1≤0.8 mm. It can further balance the energy density and reliability of the battery cell 10 and improve the performance of the battery cell 10.

[0209] Exemplarily, H 1 can be 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, etc., and any value therebetween.

[0210] Continuing to refer to Figure 7 , in some embodiments, along the thickness direction Z of the first wall 111, the thickness H of the conductive member 131 2 , satisfies 1 mm ≤ H 2 ≤ 2.5 mm.

[0211] Exemplarily, H 2 can be 1 mm, 1.2 mm, 1.4 mm, 1.7 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.5 mm, etc., and any value therebetween.

[0212] 1 mm ≤ H 2 , such that the thickness H of the conductive member 131 2 is not too small, and there is sufficient penetration depth when the conductive member 131 is welded to the bus bar component 30, ensuring the connection stability between the conductive member 131 and the bus bar component 30. H 2 ≤ 2.5 mm, such that the thickness H of the conductive member 131 2 is not too large, along the thickness direction Z of the first wall 111, the size of the conductive member 131 occupies less space, and the internal space of the battery cell 10 can be larger to accommodate a larger electrode assembly 12, improving the energy density of the battery cell 10. Therefore, 1 mm ≤ H 2 ≤ 2.5 mm can balance the energy density and reliability of the battery cell 10.

[0213] In some embodiments, 1.5 mm ≤ H 2 ≤ 2 mm.

[0214] Exemplarily, H 2 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., and any value therebetween.

[0215] In the above technical solution, it can further balance the energy density and reliability of the battery cell 10 and improve the performance of the battery cell 10.

[0216] Refer to Figure 7 , Figure 12 and Figure 13, in some embodiments, the conductive member 131 has a fourth surface 1311 facing the first insulating member 15, and the protective member 14 is a coating provided on the fourth surface 1311.

[0217] The coating can be applied by electroplating or electroless plating. For example, a zinc coating is formed on the fourth surface 1311.

[0218] In this embodiment, the protective member 14 is a coating, which simplifies the number of components. During the assembly process of the battery cell 10, there is no need to separately assemble the protective member 14, thereby improving the assembly efficiency of the battery cell 10.

[0219] In embodiments where the protective member 14 is an independent component, the connection method between the protective member 14 and other components can be various, which will be described in detail below.

[0220] In some embodiments, the protective member 14 is connected to the conductive member 131.

[0221] The connection method between the protective member 14 and the conductive member 131 can include but is not limited to bonding, welding, crimping, clamping, etc.

[0222] Optionally, the protective member 14 is connected to the conductive member 131 by cold pressing or hot pressing, so that the conductive member 131 and the protective member 14 are tightly connected, reducing the gap between the conductive member 131 and the protective member 14, and reducing the risk of poor welding at the gap where the busbar component 30 is welded to the conductive member 131 due to the gap.

[0223] The combination of the protective member 14 and the conductive member 131 after connection can be used as a prefabricated part. The protective member 14 is peeled off from the assembly process of the battery cell 10, and there is no need to separately assemble the protective member 14 during the assembly process of the battery cell 10, thereby improving the assembly efficiency of the battery cell 10.

[0224] In some embodiments, the protective member 14 is connected to the first insulating member 15.

[0225] The connection method between the protective member 14 and the first insulating member 15 can include but is not limited to bonding, clamping, etc.

[0226] The combination of the protective member 14 and the first insulating member 15 after connection can be used as a prefabricated part. The protective member 14 is peeled off from the assembly process of the battery cell 10, and there is no need to separately assemble the protective member 14 during the assembly process of the battery cell 10, thereby improving the assembly efficiency of the battery cell 10.

[0227] In some embodiments, the first insulating member 15 is a plastic part, and the plastic part is injection molded on the protective member 14.

[0228] On the one hand, the combination of the plastic part injection-molded on the protective part 14 is an injection-molded part, which can be used as a prefabricated part to strip the protective part 14 from the assembly process of the battery cell 10. During the assembly of the battery cell 10, there is no need to separately assemble the protective part 14, thereby improving the assembly efficiency of the battery cell 10. On the other hand, the plastic part is injection-molded on the protective part 14, and the process is mature, which can greatly reduce the production cost.

[0229] Figure 15 FIG. 4 is a schematic structural diagram of the protective part 14 and the first insulating part 15 according to some embodiments of the present application.

[0230] Referring to Figure 15 , in some embodiments, the protective part 14 is provided with a limiting part 141, and the first insulating part 15 is provided with a matching part 1541 that cooperates with the limiting part 141.

[0231] The limiting part 141 can be arranged on the side of the protective part 14 facing the first insulating part 15, or the limiting part 141 can be arranged on the edge of the protective part 14.

[0232] The limiting part 141 can be a convex part or a concave part. If the limiting part 141 is a convex part, the matching part 1541 is a corresponding concave part. If the limiting part 141 is a concave part, the matching part 1541 is a corresponding convex part.

[0233] In this embodiment, by restricting the movement of the protective part 14 through the limiting part 141 and the matching part 1541, the risk of relative movement of the protective part 14 with respect to the first insulating part 15 can be reduced, thereby reducing the risk of failure of the protection of the protective part 14.

[0234] Optionally, referring to Figure 15 , in some embodiments, the limiting part 141 is a convex part and the matching part 1541 is a concave part.

[0235] At least a part of the convex part is received in the concave part. The outer peripheral surface of the convex part can match the shape of the inner surface of the concave part. One or more convex parts can be provided.

[0236] By the cooperation of the convex part and the concave part, the relative movement of the protective part 14 with respect to the first insulating part 15 is restricted. And the convex part can improve the structural strength of the protective part 14.

[0237] In some embodiments, the convex parts are arranged on the edge of the protective part 14, and a plurality of convex parts are provided. The plurality of convex parts are arranged at intervals along the circumferential direction of the protective part 14. The first insulating part 15 has a fifth surface 153 facing the protective part 14. A plurality of ribs 154 are provided on the fifth surface 153. The plurality of ribs 154 are arranged around the protective part 14 at intervals. Each rib 154 extends along the circumferential direction of the protective part 14, and a concave part is formed between two adjacent ribs 154.

[0238] Among them, at least a part of the protective member 14 is disposed between the fifth surface 153 and the conductive member 131.

[0239] The protective member 14 includes two surfaces along its thickness direction Z and side surfaces connecting the two surfaces, and the convex portions can protrude from the side surfaces.

[0240] The number of the convex portions can be set according to specific requirements, and the set number of the convex portions includes but is not limited to two, three, four, etc. Exemplarily, in Figure 15 the protective member 14 is a rectangular plate. Four convex portions are provided, and the four convex portions are respectively disposed at the four edges of the rectangular plate.

[0241] The rib 154 can be integrally formed with the bottom wall 151, or the rib 154 can be separately constructed from the bottom wall 151 and then connected together. Optionally, the rib 154 and the bottom wall 151 are integrally formed.

[0242] The rib 154 can be set as a strip shape, and the rib 154 can extend along a straight line or along a racetrack shape, etc. The cross section of the rib 154 can be trapezoidal, triangular, rectangular, etc.

[0243] In this embodiment, the rib 154 can improve the structural strength of the first insulating member 15, and a concave portion is formed between two adjacent ribs 154 to cooperate with the convex portion to limit the movement of the protective member 14.

[0244] In some embodiments, the first insulating member 15 includes a bottom wall 151 and side walls 152 surrounding the bottom wall 151, and the rib 154 is disposed at the connection of the bottom wall 151 and the side walls 152, and the surface of the bottom wall 151 facing the protective member 14 is the fifth surface 153.

[0245] At least a part of the protective member 14 is disposed between the bottom wall 151 and the conductive member 131.

[0246] Optionally, the rib 154, the bottom wall 151 and the side walls 152 are integrally formed.

[0247] Among them, the rib 154 can be connected to both the bottom wall 151 and the side walls 152, or the rib 154 can not be connected to the side walls 152. For example, there is a certain gap between the rib 154 and the side walls 152.

[0248] In this embodiment, the rib 154 is disposed at the connection of the bottom wall 151 and the side walls 152, that is, the rib 154 is disposed close to the side walls 152, which can reduce the occupation of the middle area of the bottom wall 151.

[0249] In some embodiments, in order to improve the protection effect, at least a part of the protective member 14 can also be disposed between the side walls 152 and the conductive member 131.

[0250] In some embodiments, with reference toFigure 7 In the thickness direction Z of the first wall 111, the thickness of the bottom wall 151 is H 3 satisfying 1 / 10 ≤ H 1 / H 3 ≤ 1 / 2

[0251] H 1 / H 3 can be understood as the thickness ratio of the protective member 14 to the bottom wall 151 of the first insulating member 15

[0252] Exemplarily, H 1 / H 3 can be 1 / 10, 1 / 9, 1 / 8, 1 / 7, 1 / 10, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc., and any value therebetween

[0253] 1 / 10 ≤ H 1 / H 3 , compared with the bottom wall 151, the thickness H of the protective member 14 1 is not too small, so that the protective member 14 can reduce and mitigate the risk of failure of the first insulating member 15. H 1 / H 3 ≤ 1 / 2, compared with the bottom wall 151, the thickness H of the protective member 14 1 is not too large. In the thickness direction Z of the first wall 111, the size of the protective member 14 occupies a small space, and has a small impact on the energy density of the battery cell 10. Therefore, 1 / 10 ≤ H 1 / H 3 ≤ 1 / 2 can balance the energy density and reliability of the battery cell 10

[0254] In some embodiments, the busbar component 30 is welded to the conductive member 131 to form a welded portion 40. The busbar component 30 is used to realize the electrical connection of multiple battery cells 10. In the thickness direction Z of the first wall 111, the projection of the welded portion 40 falls within the projection of the protective member 14

[0255] The welding method of the busbar component 30 and the conductive member 131 can be penetration welding, butt welding, etc. Penetration welding includes but is not limited to laser penetration welding, arc penetration welding, electron beam penetration welding, etc

[0256] By making the projection of the welded portion 40 fall within the projection of the protective member 14, in this way, in the thickness direction Z of the first wall 111, the protective member 14 is located between the welded portion 40 and the first insulating member 15, and can effectively reduce the risk of failure of the first insulating member 15 caused by the welding of the conductive member 131 and the busbar component 30

[0257] In some embodiments, the housing 11 includes a housing body 112 and an end cap 111a. One end of the housing body 112 forms an opening, and the end cap 111a covers the opening. The end cap 111a is the first wall 111.

[0258] An embodiment of the present application further provides an electrical device, which includes the battery 100 provided in the first aspect embodiment, and the battery 100 is used to supply power to the electrical device.

[0259] Refer to Figures 3 to 13 , and Figure 15The embodiment of the present application also provides a battery 100, which includes a busbar component 30 and a battery cell 10, and the busbar component 30 is used to realize the electrical connection of multiple battery cells 10. The battery cell 10 includes a shell 11, an electrode terminal 13, a protective member 14, a first insulating member 15, a second insulating member 16 and a sealing member 17. The shell 11 includes a shell 112 and an end cover 111a, one end of the shell 112 forms an opening, and the end cover 111a covers the opening. The electrode terminal 13 is mounted on the end cover 111a. The electrode terminal 13 includes a conductive member 131 and a pole 132, the conductive member 131 is mounted on the end cover 111a, and the pole 132 is riveted to the conductive member 131. The conductive member 131 includes a body 1313 and a boss 1314, and the boss 1314 is arranged on the side of the body 1313 away from the first wall 111. The thickness of the boss 1314 is equal to that of the conduit component 30. The conduit component 30 is provided with a receiving portion 33. The conduit component 30 has a first surface 31 facing the end cover 111a and a second surface 32 away from the first wall 111. The receiving portion 33 is a through hole that penetrates the first surface 31 and the second surface 32. The boss 1314 is received in the through hole. Along the thickness direction Z of the first wall 111, the conduit component 30 abuts against the body 1313. Along the direction away from the first wall 111, the cross-sectional area of ​​the boss 1314 gradually decreases, and the aperture of the through hole gradually decreases. The hole wall of the through hole and the outer peripheral surface of the boss 1314 are welded to form a welding portion 40, and at least a portion of the welding portion 40 is exposed to the second surface 32. Along the thickness direction Z of the first wall 111, the conductive member 131 has a third surface 1312 away from the first wall 111, and the second surface 32 is flush with the third surface 1312. The first insulating member 15 is disposed between the end cover 111a and the conductive member 131 to insulate the conductive member 131 from the end cover 111a. The first insulating member 15 includes a bottom wall 151 and a side wall 152 surrounding the bottom wall 151. Along the thickness direction Z of the first wall 111, the conduit component 30 also abuts against the side wall 152. The protective member 14 is disposed between the bottom wall 151 and the body 1313. The material of the protective member 14 is steel, and the material of the conductive member 131 is aluminum. The bottom wall 151 has a fifth surface 153 facing the protective member 14. The fifth surface 153 is provided with four convex ribs 154. The four convex ribs 154 are arranged at intervals around the protective member 14. Each convex rib 154 extends along the circumference of the protective member 14, and a recess is formed between two adjacent convex ribs 154. The first insulating member 15 is made of upper plastic, and the rib 154, the bottom wall 151 and the side wall 152 are integrally formed. The edge of the protective member 14 is provided with four convex parts, and the four convex parts are arranged at intervals along the circumference of the protective member 14. The convex parts correspond to the concave parts one by one, and at least a part of each convex part is accommodated in the concave part. Along the thickness direction Z of the end cover 111a, the thickness of the protective member 14 is between 0.5mm and 0.8mm, and the thickness of the conductive member 131 is between 1.5mm and 2.5mm.The end cap 111a is provided with a mounting hole, the terminal post 132 passes through the mounting hole of the end cap 111a, and the seal 17 is arranged in the mounting hole and surrounds the terminal post 132. The seal 17 is an insulating part. The second insulating part 16 is arranged on the inner surface of the end cap 111a, and the inner surface of the end cap 111a is the side facing the inside of the battery cell 10. The conductive part 131 is provided with a third mounting hole 1315, and the third mounting hole 1315 penetrates through the body 1313 and the boss 1314. The protective part 14 is provided with a first mounting hole 142, the first insulating part 15 is provided with a second mounting hole 155, the second insulating part 16 is provided with a mounting hole corresponding to the third mounting hole 1315, and the terminal post 132 passes through the third mounting hole 1315, the first mounting hole 142, the second mounting hole 155, the mounting hole of the end cap 111a and the mounting hole of the second insulating part 16. The first insulating part 15 is an upper plastic, and the second insulating part 16 is a lower plastic. Along the thickness direction Z of the end cap 111a, the projection of the welding part 40 falls within the projection of the protective part 14.

[0260] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0261] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A battery cell, the battery cell comprising a housing and an electrode terminal, the housing having a first wall, the electrode terminal being disposed on the first wall; A busbar component connected to the electrode terminal, the busbar component is used to realize electrical connection of a plurality of the battery cells; The busbar component is provided with a receiving portion, and at least a portion of the electrode terminal is received in the receiving portion.

2. The battery according to claim 1, characterized in that Along the thickness direction of the first wall, the conduit component has a first surface facing the first wall and a second surface away from the first wall, and the accommodation portion is a through hole penetrating the first surface and the second surface.

3. The battery according to claim 2, characterized in that The electrode terminal includes a conductive member and a pole, wherein the conductive member is disposed outside the first wall, the pole is connected to the conductive member, and at least a portion of the conductive member is accommodated in the through hole.

4. The battery according to claim 3, characterized in that The hole wall of the through hole is welded to the conductive member to form a welding portion, and at least a portion of the welding portion is exposed to the second surface.

5. The battery according to claim 3, characterized in that The conductive element has a third surface facing away from the first wall along a thickness direction of the first wall, and the second surface is flush with the third surface.

6. The battery according to claim 3, characterized in that The conductive member includes a body and a boss, wherein the boss is disposed on a side of the body away from the first wall, at least a portion of the boss is accommodated in the accommodation portion, and along the thickness direction of the first wall, the collector component abuts against the body.

7. The battery according to claim 6, characterized in that Along the thickness direction of the first wall and in a direction away from the interior of the housing, the cross-sectional area of ​​the boss gradually decreases.

8. The battery according to claim 7, characterized in that The aperture of the through hole gradually decreases along the thickness direction of the first wall and in a direction away from the interior of the housing.

9. The battery according to claim 8, characterized in that The hole wall of the through hole and the outer peripheral surface of the boss are welded.

10. The battery according to claim 3, characterized in that The battery cell also includes a protective member and a first insulating member, wherein the first insulating member is arranged between the first wall and the conductive member to insulate the conductive member from the first wall, and along the thickness direction of the first wall, at least a portion of the protective member is arranged between the first insulating member and the conductive member, and the melting point of the protective member is greater than the melting point of the conductive member.

11. The battery according to claim 10, characterized in that The melting point of the protective element is between 1000°C and 3000°C.

12. The battery according to claim 10, characterized in that The material of the protective element includes one of steel, zinc and copper, and the material of the conductive element includes aluminum.

13. The battery according to claim 10, characterized in that Along the thickness direction of the first wall, the thickness of the protective member is H1, and the thickness of the conductive member is H2, satisfying 1 / 10≤H1 / H2≤1 / 4.

14. The battery according to claim 10, characterized in that Along the thickness direction of the first wall, the thickness H1 of the protective member satisfies 0.3 mm ≤ H1 ≤ 1 mm.

15. The battery according to claim 14, characterized in that 0.5mm≤H1≤0.8mm.

16. The battery according to claim 10, characterized in that Along the thickness direction of the first wall, the thickness H2 of the conductive member satisfies 1mm≤H2≤2.5mm.

17. The battery according to claim 16, characterized in that 1.5mm≤H2≤2mm.

18. The battery according to any one of claims 10 to 12, characterized in that: The conductive member has a fourth surface facing the first insulating member, and the protective member is a plating layer disposed on the fourth surface.

19. The battery according to any one of claims 10 to 17, characterized in that: The protective member is connected to the conductive member; or, The protective member is connected to the first insulating member.

20. The battery according to any one of claims 10 to 17, characterized in that: The first insulating member is a plastic member, and the plastic member is injection molded on the protective member.

21. The battery according to any one of claims 10 to 17, characterized in that: The protective member is provided with a limiting portion, and the first insulating member is provided with a matching portion matching with the limiting portion.

22. The battery according to claim 21, characterized in that The limiting portion is a convex portion, and the matching portion is a concave portion.

23. The battery according to claim 22, characterized in that The convex portion is arranged at the edge of the protective member, and a plurality of the convex portions are arranged at intervals along the circumference of the protective member; The first insulating member has a fifth surface facing the protective member, the fifth surface is provided with a plurality of convex ribs, the plurality of convex ribs are arranged at intervals around the protective member, each of the convex ribs extends along the circumference of the protective member, and the recess is formed between two adjacent convex ribs.

24. The battery according to claim 23, characterized in that The first insulating member includes a bottom wall and side walls surrounding the bottom wall, the convex rib is arranged at the connection between the bottom wall and the side wall, and the surface of the bottom wall facing the protective member is the fifth surface.

25. The battery according to any one of claims 10 to 17, characterized in that: The first insulating member includes a bottom wall and side walls surrounding the bottom wall. At least a portion of the protective member is disposed between the bottom wall and the conductive member. Along the thickness direction of the first wall, the thickness of the protective member is H1, and the thickness of the bottom wall is H3, satisfying 1 / 10≤H1 / H3≤1 / 2.

26. The battery according to any one of claims 10 to 17, characterized in that: The busbar component is welded with the conductive member to form a welding portion, and the busbar component is used to realize electrical connection of a plurality of battery cells; Along the thickness direction of the first wall, a projection of the welding portion falls into a projection of the protection member.

27. The battery according to any one of claims 3 to 17, characterized in that: Along the thickness direction of the first wall, the thickness of the busbar component is H4, and the thickness of the conductive member is H2, satisfying 1 / 3≤H4 / H2<1.

28. The battery according to any one of claims 1 to 17, characterized in that: The housing includes a shell and an end cover. An opening is formed at one end of the shell. The end cover covers the opening. The end cover is the first wall.

29. An electrical equipment, characterized in that: A battery comprising any one of claims 1 to 28, wherein the battery is used to supply power to the electrical device.

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