Battery and electric equipment

Abstract

The present disclosure relates to a battery and an electric device, the battery comprising: a first electrical element (2) having a first connection terminal; a second electrical element (3) having a second connection terminal; a beam structure (4) provided between the first electrical element (2) and the second electrical element (3); and the bus piece (1) is electrically connected with the first electrical element (2) and the second electrical element (3) respectively, and the bus piece (1) comprises a first connecting part (11) and a second connecting part (12), the two second connecting parts (12) are respectively connected with the two ends of the first connecting part (11) and are respectively connected with the first connecting terminal and the second connecting terminal; wherein the material yield strength of the second connecting part (12) is larger than that of the first connecting part (11), and the first connecting part (11) is bent relative to the second connecting part (12) so as to avoid the beam structure (4).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a battery and a power consumption device. BACKGROUND

[0002] Secondary batteries, especially lithium ion batteries, have the advantages of high voltage, large energy, long cycle life, green and pollution-free, wide working temperature range, and small self-discharge, and are widely used in portable electronic devices and large new energy electric vehicles, which have great significance in solving environmental pollution and energy crisis. For batteries, there is a need to further improve reliability. CONTENT OF THE INVENTION

[0003] Therefore, the present disclosure provides a battery and a power consumption device, which can help to improve the reliability of the battery.

[0004] In one aspect of the present disclosure, a battery is provided, comprising:

[0005] a first electrical element having a first connection terminal;

[0006] a second electrical element having a second connection terminal;

[0007] a beam structure arranged between the first electrical element and the second electrical element; and

[0008] a busbar electrically connected to the first electrical element and the second electrical element, respectively, the busbar comprising:

[0009] a first connection portion; and

[0010] two second connection portions connected to both ends of the first connection portion and connected to the first connection terminal and the second connection terminal, respectively;

[0011] wherein the yield strength of the second connection portion is greater than that of the first connection portion, and the first connection portion is bent relative to the second connection portion to avoid the beam structure.

[0012] In the present embodiment, by making the yield strength of the second connection portion of the connection structure greater than that of the first connection portion, the second connection portion used to connect the first electrical element and the second electrical element has higher strength, reducing the risk of creep and twist of the connection interface of the busbar, reducing the loosening or failure of the connection, helping to achieve stable electrical connection. By arranging the first connection portion to be bent relative to the second connection portion to avoid the beam structure in the battery, the interference in the battery is reduced, and the reliability of the battery is improved.

[0013] In some embodiments, the materials of the first connection portion and the second connection portion are different.

[0014] In the embodiment, the first connecting part between the two second connecting parts is made of a material different from that of the second connecting part. According to the density and cost of the actual use scene, the first connecting part can be made of a material with lower density and cost, thereby reducing the weight and cost of the busbar, and further reducing the overall weight and cost of the battery.

[0015] In some embodiments, the material of the first connecting part includes aluminum, and the material of the second connecting part includes copper.

[0016] In the embodiment, the material of the first connecting part includes aluminum, which helps to reduce the weight and cost of the busbar, and the material of the second connecting part includes copper, which can achieve higher creep resistance and reduce the risk of failure of the connecting interface at both ends of the busbar, thereby making the battery have higher reliability and lower cost, and improving the performance of the battery under complex working conditions.

[0017] In some embodiments, the second connecting part includes a plurality of stacked copper sheets.

[0018] In the embodiment, the second connecting part is made of stacked copper sheets, which can meet the molding requirements of complex bending, adapt the busbar to complex installation paths and installation spaces, and absorb errors through its own deformation to improve the fault tolerance of assembly.

[0019] In some embodiments, the thickness of each copper sheet is 0.1-0.5 mm.

[0020] In the embodiment, the thickness of each copper sheet includes but is not limited to 0.1 mm, 0.2 mm or 0.5 mm, which can be adjusted according to the actual application scenario. Selecting a copper sheet with smaller thickness can make the second connecting part have better flexibility.

[0021] In some embodiments, the first connecting part is provided with a stepped first connecting structure at both ends, and each second connecting part is provided with a stepped second connecting structure near the end of the first connecting part.

[0022] The first connecting part and the second connecting part are connected through the first connecting structure and the second connecting structure, so that the surface of the first connecting part perpendicular to the thickness direction and the surface of the second connecting part perpendicular to the thickness direction are smoothly connected.

[0023] In the embodiment, the first connecting structure and the second connecting structure are provided in a stepped shape, which can make the surface of the first connecting part and the second connecting part perpendicular to the third direction Z form a smooth transition, thereby reducing the space occupation in the battery.

[0024] In some embodiments, the beam structure extends along a first direction and is arranged between the first electrical element and the second electrical element along a second direction perpendicular to the first direction.

[0025] The first connecting portion forms an avoiding space by bending relative to the second connecting portion.

[0026] In the embodiment, by setting the first connecting portion to bend relative to the second connecting portion, the avoiding space can be formed on one side of the first connecting portion to arch away from the beam structure, so that other electrical elements or other internal structures such as the beam structure pass through the avoiding space, thereby reducing the interference in the battery.

[0027] In some embodiments, the first connecting portion includes a first avoiding structure arranged on one side of the beam structure along the second direction, a second avoiding structure arranged on the other side of the beam structure along the second direction, and a third avoiding structure connected with the first avoiding structure and the second avoiding structure respectively, the third avoiding structure is arranged on one side of the beam structure along a third direction, and the first avoiding structure and the second avoiding structure are bent relative to the third avoiding structure and the second connecting portion. The third direction is perpendicular to the first direction and the second direction.

[0028] In the embodiment, in order to avoid the beam structure, the first avoiding structure and the second avoiding structure of the first connecting portion are bent relative to the third avoiding structure and the second connecting portion respectively, so that the first avoiding structure, the second avoiding structure and the third avoiding structure can form an avoiding space, and sufficient avoiding space is left for the arrangement of the beam structure and other busbars, thereby reducing the interference between the busbars and other structures in the battery such as the beam structure.

[0029] In some embodiments, the second avoiding structure has an avoiding substructure curved in a plane perpendicular to the second direction, and the avoiding substructure at least partially overlaps with a projection of the first avoiding structure in the plane perpendicular to the second direction.

[0030] In the embodiment, by making the second avoiding structure have a U-shaped curved avoiding substructure in a plane perpendicular to the second direction, the avoiding substructure can be at least partially aligned with the first avoiding structure along the second direction, so that the distance interval of the first electrical element and the second electrical element in the direction can be balanced, and the connection convenience can be improved. The avoiding substructure perpendicular to the second direction can also avoid the wiring harness arranged along the first direction, so that the wiring harness can be arranged close to the avoiding substructure, thereby reducing the interference.

[0031] In some embodiments, the battery further comprises:

[0032] The power distribution device is arranged in the box of the battery, and the second electrical element includes a relay arranged in the power distribution device.

[0033] The first electrical element includes a connector, and at least part of the connector is arranged outside the box of the battery.

[0034] In the embodiment, the busbar is used in the high-voltage connection scenario between the electrical elements in the battery box and on the battery box, so that the force applied by the bolt can be effectively maintained in the high-voltage and large-span connection environment, and the electrical elements can realize reliable and stable electrical connection, which helps to improve the use safety and use performance of the battery.

[0035] In some embodiments, the second connecting part comprises:

[0036] a connecting structure for connecting with the first connecting terminal or the second connecting terminal; and / or

[0037] a constraint structure arranged in a spaced manner with the connecting structure and configured to constrain the wire harness.

[0038] In the embodiment, for the electrical element with a large number of connecting wire harnesses such as a relay, the second connecting part can further be provided with a constraint structure for constraining the wire harness, so as to avoid the interference between the wire harness and other components caused by the disordered distribution of the wire harness, thereby improving the space utilization and use safety in the battery.

[0039] In another aspect of the present disclosure, a power utilization device is provided, and the power utilization device comprises:

[0040] The battery according to any one of the above is used to provide electric energy.

[0041] In the embodiment, the battery can be applied to various power utilization devices requiring the use of a battery. For the power utilization device using the above battery, the energy source can be provided by the battery, which can effectively reduce the risk of creep untwisting of the busbar and improve the safety performance of the power utilization device. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0043] The present disclosure can be more clearly understood and appreciated from the following detailed description, taken in conjunction with the following drawings, in which:

[0044] Figure 1 is a structural schematic diagram of some embodiments of the power utilization device according to the present disclosure;

[0045] Figure 2 is a structural schematic diagram of some embodiments of the battery according to the present disclosure;

[0046] Figure 3 is a structural schematic diagram of another some embodiments of the battery according to the present disclosure;

[0047] Figure 4 is a partial schematic diagram of region A of Figure 3

[0048] Figure 5 ​Fig. 1 is a schematic diagram of a busbar connection relationship according to some embodiments of the battery of the present disclosure;

[0049] Figure 6 Fig. 2 is a schematic diagram of a structure of a busbar according to some embodiments of the battery of the present disclosure;

[0050] Figure 7 Fig. 3 is a schematic diagram of a structure of a busbar according to some other embodiments of the battery of the present disclosure.

[0051] Fig. 4 is a schematic diagram of a structure of a busbar according to some other embodiments of the battery of the present disclosure.

[0052] 100, an electrical device;

[0053] 10, a battery;

[0054] 1, a busbar; 11, a first connecting portion; 110, a clearance; 111, a first clearance structure; 112, a second clearance structure; 113, a third clearance structure; 12, a second connecting portion; 120, a connecting structure; 121, a constraint structure; 122, a connecting body; 123, a fourth clearance structure; 123a, a first clearance body; 123b, a second clearance body; 124, a fifth clearance structure; 124a, a third clearance body; 124b, a fourth clearance body;

[0055] 2, a first electrical element; 3, a second electrical element; 4, a beam structure; 5, a battery cell;

[0056] X, a first direction; Y, a second direction; Z, a third direction.

[0057] It should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Furthermore, like or similar reference numerals are intended to represent like or similar parts throughout the specification. DETAILED DESCRIPTION

[0058] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses, except as described in the claims. The present disclosure can be implemented in numerous different forms, as will be apparent to one of ordinary skill in the art. The embodiments provided are in the nature of a best mode of the disclosure and are provided to give a full and enabling disclosure as required by the law, and are not intended to limit the scope of the disclosure or application or uses thereof in any way. It should be noted that the relative arrangement of the components and steps illustrated in these embodiments, the components of the compositions, the numerical expressions and numerical values set forth in these embodiments are to be interpreted as merely exemplary and are in no way limiting.

[0059] The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different parts. The terms "include", "contain", and similar terms mean that the elements before the terms encompass the elements listed after the terms, and do not exclude the possibility of also encompassing other elements. "Up", "down", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0060] In the present disclosure, when it is described that a specific device is located between a first device and a second device, there can be an intervening device between the specific device and the first device or the second device, or there can be no intervening device. When it is described that a specific device is connected to other devices, the specific device can be directly connected to the other devices without an intervening device, or can not be directly connected to the other devices with an intervening device.

[0061] All terms used in the present disclosure, including technical terms or scientific terms, have the same meanings as understood by a person of ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. It should also be understood that terms defined in general dictionaries should be interpreted in a manner consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or extremely formalized sense, unless otherwise defined herein.

[0062] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate.

[0063] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0066] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to one of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments of the present application, the term "and / or" is merely used to describe an associated relationship between associated objects, and can represent three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0068] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0069] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0070] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0071] The battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0072] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0073] The battery cell includes an electrode assembly. The electrode assembly includes first and second polar plates having opposite polarities, and a separator disposed between the first and second polar plates. In some embodiments, the first polar plate is a positive polar plate and the second polar plate is a negative polar plate. In other embodiments, the first polar plate is a negative polar plate and the second polar plate is a positive polar plate. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are intercalated and deintercalated between the positive and negative polar plates. The separator is disposed between the positive and negative polar plates to prevent short circuiting between the positive and negative polar plates, while allowing the active ions to pass through.

[0074] In some embodiments, the positive polar plate can include a positive current collector substrate and a positive active material layer disposed on at least one surface of the positive current collector substrate.

[0075] As an example, the positive current collector substrate has two surfaces opposite in the thickness direction of the positive current collector substrate, and the positive active material layer is disposed on either one or both of the two surfaces of the positive current collector substrate.

[0076] As an example, the positive current collector substrate can be a metal foil or a composite current collector. For example, as a metal foil, silver surface treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by disposing a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0077] As an example, the positive active material layer can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, the disclosure is not limited to these materials, and other conventional materials that can be used as a battery positive active material layer can also be used. These positive active material layers can be used alone only one or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFeP04(also can be referred to as LFP)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite of lithium manganese phosphate and carbon, lithium manganese iron phosphate, a composite of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3Mn 1 / 3 O2(also can be referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2(also can be referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2(also can be referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2(also can be referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2(also can be referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2), and modified compounds thereof.

[0078] In some embodiments, the negative electrode tab can include a negative current collector substrate.

[0079] As an example, the negative current collector substrate can employ a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, or the like can be employed. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, or the like. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by applying a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, or the like) on a polymer material base substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0080] In some embodiments, the negative electrode tab can include a negative current collector substrate and a negative active material layer disposed on at least one surface of the negative current collector substrate.

[0081] As an example, the negative current collector substrate has two surfaces opposite in the thickness direction thereof, and the negative active material layer is disposed on either one or both of the two opposite surfaces of the negative current collector substrate.

[0082] As an example, the negative active material layer can employ a negative active material layer for a battery cell known in the art. As an example, the negative active material layer can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate, or the like. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present disclosure is not limited to these materials, and other conventional materials that can be used as a battery negative active material layer can also be used. These negative active material layers can be used alone or in combination of two or more.

[0083] In some embodiments, the material of the positive current collector substrate can be aluminum, and the material of the negative current collector substrate can be copper.

[0084] In some embodiments, the separator is a separator film. The present disclosure does not have a particular limitation on the type of separator film, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0085] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive electrode sheet and the negative electrode sheet, or can be attached to the surface of the positive electrode sheet and / or the surface of the negative electrode sheet while being located between the positive electrode sheet and the negative electrode sheet.

[0086] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode sheet and the negative electrode sheet, and functions to transport ions and separate the positive and negative electrodes.

[0087] In some embodiments, the battery cell further includes an electrolyte that functions to conduct ions between the positive and negative electrodes. The type of electrolyte is not particularly limited by the present disclosure and can be selected as desired. The electrolyte can be liquid, gel, or solid.

[0088] As an example, the liquid electrolyte includes an electrolyte salt and a solvent.

[0089] In some embodiments, the electrolyte salt can be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonylimide, lithium bis-trifluoromethanesulfonylimide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoro oxalate borate, lithium di-oxalate borate, lithium difluoro di-oxalate phosphate, and lithium tetrafluoro oxalate phosphate.

[0090] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, butanediol sulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether-based solvent. The ether-based solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ether.

[0091] As an example, the gel electrolyte includes a polymer as a backbone network of the electrolyte, in combination with an ionic liquid-lithium salt.

[0092] As an example, the solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0093] As an example, the polymer solid-state electrolyte can be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single-ion polymer, polyionic liquid-lithium salt, cellulose, etc.

[0094] As an example, the inorganic solid-state electrolyte can be one or more of oxide solid-state electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON thin film), sulfide solid-state electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorus sulfide, argyrodite), amorphous sulfide), halide solid-state electrolyte, nitride solid-state electrolyte, and hydride solid-state electrolyte.

[0095] As an example, the composite solid-state electrolyte is formed by adding inorganic solid-state electrolyte fillers to the polymer solid-state electrolyte.

[0096] In some embodiments, the electrode assembly includes a wound structure. The positive electrode sheet, the negative electrode sheet, and the separator are wound into the wound structure. One or more positive electrode sheets and one or more negative electrode sheets can be provided, respectively. As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets are alternately arranged in the thickness direction of the electrode sheet.

[0097] In some embodiments, the electrode assembly can have a shape of a cylinder, a flat, or a multi-prism, etc.

[0098] In some embodiments, the positive electrode sheet includes a positive electrode tab, and the negative electrode sheet includes a negative electrode tab. The positive electrode tab and the negative electrode tab can be used to lead current out of the electrode assembly. The positive electrode tab and the negative electrode tab are connected to the positive current collector substrate and the negative current collector substrate, respectively. The tabs can be formed by cutting or cutting the current collector substrate, or can be connected to the side of the current collector substrate by welding.

[0099] In some embodiments, the battery cell can include a housing. The housing is used to package components such as the electrode assembly and the electrolyte.

[0100] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, the prismatic battery cell including a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, etc.

[0101] The battery referred to in the embodiments of the present disclosure refers to a single physical module including a plurality of battery cells to provide higher voltage and capacity.

[0102] In some embodiments, the battery can be a battery pack including a box and a plurality of battery cells, the plurality of battery cells being contained in the box, or a battery module formed by arranging and fixing a plurality of battery cells being contained in the box. The battery pack can further include a battery management system and a power distribution module.

[0103] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0104] In some embodiments, the battery can be used in various types of electric devices using batteries. The electric device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer. The electric device is not particularly limited in the embodiments of the present disclosure.

[0105] In the high-pressure connection scenario of the battery, the yield strength of the 6-series aluminum bar is low, which leads to the high-temperature creep untwisting phenomenon of the 6-series aluminum bar under the long-term bearing of the high-pressure connection bolt locking force. Specifically, under the action of high temperature and continuous stress, the microstructure of the 6-series aluminum bar will slowly deform, and the creep phenomenon will cause the pre-tightening force of the bolt to decrease, the contact pressure of the connection interface to gradually decrease, and then cause the loosening or failure of the connection interface, thereby affecting the reliability of the battery.

[0106] Therefore, the embodiments of the present disclosure provide a battery, which helps to improve the reliability of the battery.

[0107] In one aspect of the present disclosure, a battery is provided, comprising:

[0108] a first electrical element having a first connection terminal;

[0109] a second electrical element having a second connection terminal;

[0110] a beam structure arranged between the first electrical element and the second electrical element; and

[0111] a busbar electrically connected to the first electrical element and the second electrical element, respectively, the busbar comprising:

[0112] a first connection portion; and

[0113] two second connection portions connected to both ends of the first connection portion and connected to the first connection terminal and the second connection terminal, respectively;

[0114] wherein the material yield strength of the second connection portion is greater than that of the first connection portion, and the first connection portion is bent relative to the second connection portion to avoid the beam structure.

[0115] In this embodiment, by making the yield strength of the second connecting part of the connecting structure greater than that of the first connecting part, the second connecting part used for connecting the first electrical element and the second electrical element has a higher yield strength, reducing the risk of creep and untwisting of the busbar connecting interface, reducing the loosening or failure of the connection, and helping to achieve stable electrical connection. By bending the first connecting part relative to the second connecting part to avoid the beam structure inside the battery, the interference inside the battery is reduced, and the reliability of the battery is further improved.

[0116] Figure 1 is a structural schematic diagram of some embodiments of the power-using equipment according to the present disclosure. The power-using equipment 100 can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy, and an electric tool, etc. When the power-using equipment is an electric automobile, the battery can be arranged at the chassis assembly or the front and rear of the vehicle.

[0117] Figure 2 is a structural schematic diagram of some embodiments of the battery according to the present disclosure. The battery 10 can be used for power supply of the power-using equipment. For example, the battery 10 can be used as an operating power source of the vehicle, for the circuit system of the vehicle, such as the working power demand for starting, navigation, and running of the vehicle. The battery 10 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving force for the vehicle. The battery 10 can also be used for other power-using devices, such as a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer.

[0118] Figure 3 is a structural schematic diagram of some other embodiments of the battery according to the present disclosure, Figure 4 is Figure 3 is a partial schematic diagram of the area A of Figure 5 is a busbar connecting relationship schematic diagram of some embodiments of the battery according to the present disclosure, Figure 6 is a structural schematic diagram of the busbar of some embodiments of the battery according to the present disclosure, Figure 7 is a structural schematic diagram of the busbar of some other embodiments of the battery according to the present disclosure.

[0119] Referring to Figures 3-7In some embodiments, the battery 10 includes the busbar 1, the first electrical element 2, the second electrical element 3, and the beam structure 4. The first electrical element 2 has a first connecting terminal, the second electrical element 3 has a second connecting terminal, and the busbar 1 is electrically connected to the first connecting terminal and the second connecting terminal, respectively. The beam structure 4 is arranged between the first electrical element 2 and the second electrical element 3.

[0120] The busbar 1 includes a first connecting portion 11 and two second connecting portions 12, the two second connecting portions 12 are connected to two ends of the first connecting portion 11 and are connected to the first connecting terminal and the second connecting terminal, respectively. The material yield strength of the second connecting portion 12 is greater than that of the first connecting portion 11, and the first connecting portion 11 is bent relative to the second connecting portion 12 to avoid the beam structure 4.

[0121] The first electrical element 2 and the second electrical element 3 can be high-voltage electrical elements, and the number of busbars 1 is one or more. The busbar 1 includes, but is not limited to, a connection between a connector and a relay in the battery 10, a connection between relays, a connection between a shunt and a relay, a connection between a relay and a manual maintenance switch, a connection between a shunt and a connector, and a connection between a fuse and a connector, etc. The first electrical element 2 and the second electrical element 3 are arranged at intervals, and the beam structure 4 passes through between the first electrical element 2 and the second electrical element 3.

[0122] The first connecting portion 11 is arranged between the two second connecting portions 12, and the second connecting portion 12 includes, but is not limited to, welding or locking connection with the first connecting terminal and the second connecting terminal. Each second connecting portion 12 can be provided with a connecting structure 120, and each second connecting portion 12 is electrically connected to the first connecting terminal and the second connecting terminal through the connecting structure 120, respectively. The connecting structure 120 includes a locking hole.

[0123] The first connecting portion 11 and the second connecting portion 12 can respectively include the same material but have different yield strengths, for example, the first connecting portion 11 includes T2 copper, and the second connecting portion 12 includes phosphorus deoxidized copper.

[0124] The connecting structure 120 bears the bolt pre-tightening force. The charging and discharging current in the high-voltage loop of the battery 10 can generate a large thermal stress, which can cause the busbar 1 to accelerate creep and easily cause the bolt at the connecting structure 120 to loosen or fail. By making the second connecting portion 12 have a higher yield strength, the busbar 1 can achieve better creep resistance and deformation resistance, reducing the situation of bolt loosening and failure.

[0125] In the embodiment, by making the yield strength of the second connecting part 12 greater than that of the first connecting part 11, the second connecting part 12 used for connecting the first electrical element 2 and the second electrical element 3 has higher strength, the risk of creep untwisting of the connecting interface of the busbar 1 is reduced, the situation of loose or failure of the connection is reduced, which helps to realize stable electrical connection. By bending the first connecting part 11 relative to the second connecting part 12 to avoid the beam structure 4 in the battery, the interference in the battery is reduced, and the reliability of the battery is further improved.

[0126] Reference Figures 3-7 The materials of the first connecting part 11 and the second connecting part 12 are different.

[0127] In the embodiment, by selecting different materials for the first connecting part 11 between the two second connecting parts 12 and the second connecting part 12, the first connecting part 11 can be made of a material with lower density and cost according to the density, cost and other factors in the actual use scene, thereby reducing the weight and cost of the busbar 1, and further reducing the overall weight and cost of the battery 10.

[0128] Reference Figure 6 and Figure 7 In some embodiments, the material of the first connecting part 11 includes aluminum, and the material of the second connecting part 12 includes copper.

[0129] The first connecting part 11 is made of aluminum material, including but not limited to 1-series aluminum or 6-series aluminum. The second connecting part 12 is made of copper material, including but not limited to T2 copper, TU-2 copper, T3 copper, T4 copper, phosphorus deoxidized copper, and high-purity copper with high electrical conductivity. The second connecting part 12 can be made of soft copper with a surface nickel sheet, a silver sheet, a tin sheet, a gold sheet, or hard copper with a silver plating, a nickel plating, a tin plating, or a composite plating according to actual conditions.

[0130] The material of the second connecting part 12 includes copper, thereby allowing the formation of a connecting structure 120 in the second connecting part 12 through a stamping process. The formation of the connecting structure 120 through stamping can achieve higher efficiency and material utilization, and help reduce processing costs.

[0131] In the embodiment, the material of the first connecting part 11 includes aluminum, which helps to reduce the weight and cost of the busbar 1, and the material of the second connecting part 12 includes copper, which can achieve higher creep resistance and reduce the risk of failure of the connecting interface at both ends of the busbar 1, thereby making the battery 10 have higher reliability and lower cost, and improving the performance of the battery 10 under complex working conditions.

[0132] In some embodiments, the second connecting part 12 includes a plurality of stacked copper sheets, and the copper sheets are stacked in the vertical direction.

[0133] The second connecting part 12 is in the form of a plurality of copper sheets stacked together, which can improve the flexibility of the second connecting part 12, facilitate the shaping of the second connecting part 12 according to requirements, and reduce the processing difficulty. The second connecting part 12 can be made of soft copper, so that the busbar 1 forms a required shape structure, meets the space requirements of the use position of the busbar 1, and reduces the interference with the surrounding structure.

[0134] In the embodiment, the second connecting part 12 is made of stacked copper sheets, so that the second connecting part 12 can meet the shaping requirements of complex bending, so that the busbar 1 can adapt to a complex installation path and installation space, and can absorb errors through its own deformation to improve the fault tolerance of assembly.

[0135] In some embodiments, the thickness of each copper sheet is 0.1-0.5 mm.

[0136] In the embodiment, the thickness of each copper sheet includes but is not limited to 0.1 mm, 0.2 mm or 0.5 mm, which can be adjusted according to actual application scenarios. Selecting a copper sheet with a smaller thickness can make the second connecting part 12 have better flexibility.

[0137] Reference is made to Figures 5-7 , Figure 5 the region D in Figure 6 the region B in Figure 7 and the region C in

[0138] Reference is made to Figure 5 and Figure 6 In some embodiments, the two ends of the first connecting part 11 are respectively provided with a first connection structure in the form of a step, and each second connecting part 12 is respectively provided with a second connection structure in the form of a step near the end of the first connecting part 11.

[0139] The first connecting part 11 and the second connecting part 12 are connected through the first connection structure and the second connection structure, so that the surface of the first connecting part 11 perpendicular to the thickness direction and the surface of the second connecting part 12 perpendicular to the thickness direction are smoothly connected. The thickness direction of the first connecting part 11 and the thickness direction of the second connecting part 12 are parallel to the third direction Z.

[0140] The first connection structure is arranged at the two ends of the first connecting part 11 along the second direction Y, and the first connection structure is in the form of a step, so that the two ends of the first connecting part 11 form a matching space for accommodating the second connection structure.

[0141] The second connecting portion 12 is provided with a second connecting structure at an end portion of the second connecting portion 12 along the second direction Y and close to the first connecting portion 11, the second connecting structure is in a stepped shape, and can be matched with the adjacent first connecting structure to make the surfaces of the first connecting portion 11 and the second connecting portion 12 perpendicular to the second direction Y abut each other, and make the two surfaces of the current collector 1 perpendicular to the third direction Z form a smooth transition.

[0142] The shapes of the first connecting structure and the second connecting structure can be adjusted according to actual application scenarios, for example, the first connecting structure and the second connecting structure can also be set as inclined surfaces inclined relative to the third direction Z.

[0143] In the embodiment, by setting the first connecting structure and the second connecting structure in a stepped shape, the surfaces of the first connecting portion 11 and the second connecting portion 12 perpendicular to the third direction Z can form a smooth transition, thereby reducing the space occupation in the battery 10.

[0144] Reference Figure 7 In some embodiments, the first connecting portion 11 and the second connecting portion 12 can be directly welded, thereby improving the convenience of welding and reducing production costs.

[0145] The aluminum bar and the copper bar can be welded by electromagnetic pulse welding, and the flatness, roughness and cleanliness of the welding interface do not need to be strictly controlled during the welding process, which can effectively reduce the production cost and time.

[0146] The thickness W of the aluminum bar and the copper bar is 1-5 mm, and the length L of the welding area is 8-30 mm. In the case of ensuring the welding strength and conductivity of the aluminum bar and the copper bar, setting the length L of the welding area to 8-30 mm can also have material utilization and production cost.

[0147] The power of the electromagnetic pulse welding is selected to be 5-15 KV, and the metal bonding layer thickness of the aluminum bar and the copper bar is 2-40 microns, so as to improve the welding quality and reliability of the welding interface.

[0148] In the embodiment, the aluminum bar and the copper bar are connected by electromagnetic pulse welding, which can reduce the requirements in the process and make the production process of the current collector 1 more simple and efficient.

[0149] Reference Figures 3-5 In some embodiments, the beam structure 4 extends along the first direction X and is arranged between the first electrical element 2 and the second electrical element 3 along the second direction Y perpendicular to the first direction X. The first connecting portion 11 is bent relative to the second connecting portion 12 to form an avoiding space 110 avoiding the beam structure 4.

[0150] The first connecting portion 11 is bent relative to the second connecting portion 12 to form a clearance space 110 arched away from the beam structure 4 along the third direction Z, and the busbar 1 passes through the beam structure 4 through the clearance space 110 formed by the bending of the first connecting portion 11, so that the beam structure 4 passes through the clearance space 110 to avoid interference. The busbar 1 can be wrapped with an insulating layer.

[0151] The clearance space 110 can also avoid other electrical elements such as busbars or other structures in the battery.

[0152] In this embodiment, by setting the first connecting portion 11 to be bent relative to the second connecting portion 12, a clearance space 110 can be formed on one side of the first connecting portion 11 to avoid other electrical elements such as the beam structure 4 in the battery 10 or other internal structures, reducing interference.

[0153] Reference Figure 3 and Figure 4 In some embodiments, the first connecting portion 11 includes a first clearance structure 111 disposed on one side of the beam structure 4 along the second direction Y, a second clearance structure 112 disposed on the other side of the beam structure 4 along the second direction Y, and a third clearance structure 113 connected to the first clearance structure 111 and the second clearance structure 112, respectively, the third clearance structure 113 being disposed on one side of the beam structure 4 along the third direction Z, the first clearance structure 111 and the second clearance structure 112 being bent relative to the third clearance structure 113 and the second connecting portion 12. The third direction Z is perpendicular to the first direction X and the second direction Y.

[0154] The first clearance structure 111 and the second clearance structure 112 are bent relative to the third clearance structure 113 and the second connecting portion 12, respectively, so that the first clearance structure 111, the second clearance structure 112 and the third clearance structure 113 form a clearance space 110, and the third clearance structure 113 is disposed relative to the second connecting portion 12 and the beam structure 4 along the third direction Z, reducing interference with the beam structure 4. The width of the third clearance structure 113 along the second direction Y can be adjusted according to the width of the beam structure 4 and the space around the connecting area.

[0155] In this embodiment, in order to avoid the beam structure 4, the first clearance structure 111 and the second clearance structure 112 of the first connecting portion 11 are bent relative to the third clearance structure 113 and the second connecting portion 12, respectively, so that the first clearance structure 111, the second clearance structure 112 and the third clearance structure 113 form a clearance space 110, and the beam structure 4 and other busbars 1 are arranged to have sufficient clearance space, reducing interference between the busbar 1 and other structures in the battery 10 such as the beam structure 4.

[0156] Reference Figures 3-5In some embodiments, the second avoiding structure 112 has avoiding sub-structures that are curved in a plane perpendicular to the second direction Y, and the avoiding sub-structures at least partially overlap with the projection of the first avoiding structure 111 in the plane perpendicular to the second direction Y.

[0157] In the present embodiment, by making the second avoiding structure 112 have U-shaped curved avoiding sub-structures in a plane perpendicular to the second direction Y, the avoiding sub-structures can be at least partially aligned with the first avoiding structure 111 along the second direction Y, so that the distance interval of the first electrical element 2 and the second electrical element 3 in the direction Y can be balanced, and the connection convenience can be improved. The avoiding sub-structures perpendicular to the second direction Y can also avoid the wiring harness arranged along the first direction X, so that the wiring harness can be arranged close to the avoiding sub-structures, and the interference can be reduced.

[0158] Reference Figures 3-5 In some embodiments, the battery 10 further comprises a power distribution device arranged in the box of the battery, the second electrical element 3 comprises a relay arranged in the power distribution device, and the first electrical element 2 comprises a connector at least partially arranged outside the box of the battery, and the connector is arranged spaced apart from the power distribution device along the second direction Y.

[0159] The second electrical element 3 includes but is not limited to a relay, a fuse, a shunt, and other electrical elements inside the battery. The connector is used to connect with electrical equipment outside the box, and the first electrical element 2 can also include an output pole arranged in the battery box or other electrical elements arranged inside the battery box.

[0160] In the present embodiment, the busbar 1 is used in the high-voltage connection scenario between the electrical elements inside and outside the battery box, so that the force exerted by the bolt can be effectively maintained in the high-voltage and large-span connection environment, and the electrical elements can realize reliable and stable electrical connection, which helps to improve the use safety and performance of the battery 10.

[0161] Reference Figures 3-5 In some embodiments, the second connecting portion 12 comprises a connecting structure 120 and / or a constraint structure 121. The connecting structure 120 is used to connect with the first connecting terminal or the second connecting terminal. The constraint structure 121 is arranged spaced apart from the connecting structure 120 and is configured to constrain the wiring harness.

[0162] In the present embodiment, for electrical elements such as relays that have more wiring harnesses, the second connecting portion 12 can further arrange the constraint structure 121 to constrain the wiring harness, so as to avoid the interference caused by the disordered distribution of the wiring harness with other components, thereby improving the space utilization and use safety in the battery 10.

[0163] Reference Figure 6 and Figure 7In some embodiments, the first connecting portion 11 is arranged perpendicularly to the third direction Z, and the length of the first connecting portion 11 along the second direction Y can be adjusted according to actual conditions.

[0164] One of the second connecting portions 12 comprises a connecting body 122 provided with a connecting structure 120 and a fourth avoiding structure 123 connected to the connecting body 122, and the other second connecting portion 12 comprises a connecting body 122 provided with a connecting structure 120 and a fifth avoiding structure 124 connected to the connecting body 122, and the two ends of the first connecting portion 11 along the second direction Y are connected to the fourth avoiding structure 123 and the fifth avoiding structure 124 respectively.

[0165] The fourth avoiding structure 123 is at least partially bent relative to the connecting body 122 and the first connecting portion 11, and the fifth avoiding structure 124 is at least partially bent relative to the connecting body 122 and the first connecting portion 11, so that the fourth avoiding structure 123 and the fifth avoiding structure 124 form an avoiding space of the avoiding beam structure 4 with the first connecting portion 11.

[0166] The fourth avoiding structure 123 comprises a first avoiding body 123a arranged in parallel with the first connecting portion 11 and the connecting body 122, and a second avoiding body 123b perpendicular to the first connecting portion 11, the connecting body 122 and the first avoiding body 123a, the first avoiding body 123a is connected to the first connecting portion 11 and the second avoiding body 123b respectively, and the first avoiding body 123a and the second avoiding body 123b are connected through a circular arc transition.

[0167] The fifth avoiding structure 124 comprises a third avoiding body 124a arranged in parallel with the first connecting portion 11 and the connecting body 122, and a fourth avoiding body 124b perpendicular to the first connecting portion 11, the connecting body 122 and the third avoiding body 124a, the third avoiding body 124a is connected to the first connecting portion 11 and the fourth avoiding body 124b respectively, and the third avoiding body 124a and the fourth avoiding body 124b are connected through a circular arc transition.

[0168] The fourth avoiding body 124b is curved in a plane perpendicular to the second direction Y, and the projection of the fourth avoiding body 124b in the plane perpendicular to the second direction Y at least partially overlaps with the second avoiding body 123b.

[0169] Reference Figure 1 In another aspect of the embodiments of the present disclosure, a power-using device 100 is provided, which comprises the battery 10 as described in any of the above embodiments, and the battery 10 is used to provide electric energy.

[0170] In the embodiment, the battery 10 can be applied to various power consumption devices 100 requiring the use of batteries. For the power consumption device 100 using the battery 10, the power supply provided by the battery 10 can effectively reduce the risk of creep untwisting of the busbar 1 and improve the safety performance of the power consumption device 100.

[0171] Reference Figures 3-7 In some embodiments, the busbar 1 includes a first connecting part 11 made of aluminum and a second connecting part 12 made of copper. The first connecting part 11 and the second connecting part 12 are welded by electromagnetic pulse welding, with a welding power of 5-15 KV and a metal bonding layer thickness of 2-40 microns. The connecting structure 120 is formed by a punching process.

[0172] The first connecting part 11 is made of 1-series aluminum or 6-series aluminum, and the second connecting part 12 is made of T2 copper, TU-2 copper, T3 copper, T4 copper, phosphorus deoxidized copper, high-purity copper, or other high-conductivity copper. The thickness W of the first connecting part 11 is 1-5 mm, and the thickness W of the second connecting part 12 is 1-5 mm. The length L of the welding area of the first connecting part 11 and the second connecting part 12 is 8-30 mm.

[0173] The first connecting part 11 is a stamped or bent aluminum bar, and the second connecting part 12 is a single-layer soft copper with a thickness of 0.1 mm, 0.2 mm, or 0.5 mm, with a nickel, silver, tin, or gold sheet attached to the surface. Alternatively, the second connecting part 12 is a hard copper with a silver, nickel, tin, or composite plating on the surface. Both the first connecting part 11 and the second connecting part 12 are formed by a stamping process to ensure processing precision and surface quality, laying a foundation for subsequent electromagnetic pulse welding.

[0174] The welding area is locally thinned before welding, for example, the copper bar and the aluminum bar are thinned by half, so that the aluminum bar and the copper bar form a busbar 1 with equal thickness after welding, and the thickness direction is smoothly transitioned, thereby reducing the occupation of the space inside the battery 10 along the thickness direction.

[0175] In the embodiment, copper is used as the connecting terminal of the busbar 1, which has higher yield strength and can effectively avoid the risk of high-temperature creep untwisting, improving the reliability and long-term stability of the connection. The first connecting part 11 and the second connecting part 12 are welded by electromagnetic pulse welding, without the need for strict control of flatness, roughness, and polishing during the process, and the control points of the process are relatively few.

[0176] Thus, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0177] Although some specific embodiments of the present disclosure have been described in detail by way of example with reference to the drawings, it is to be understood that the above examples are intended to be illustrative only and are not intended to limit the scope of the present disclosure. It is to be understood that modifications or equivalent arrangements of the above embodiments can be made by those skilled in the art without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery, characterized in that, include: The first electrical component (2) has a first connection terminal; The second electrical component (3) has a second connection terminal; A beam structure (4) is disposed between the first electrical component (2) and the second electrical component (3); and A busbar (1) is electrically connected to the first electrical component (2) and the second electrical component (3) respectively. The busbar (1) includes: First connecting part (11); and Two second connecting parts (12) are respectively connected to both ends of the first connecting part (11) and respectively connected to the first connecting terminal and the second connecting terminal; The second connecting part (12) has a higher yield strength than the first connecting part (11), and the first connecting part (11) is bent relative to the second connecting part (12) to avoid the beam structure (4).

2. The battery as described in claim 1, characterized in that, The first connecting part (11) and the second connecting part (12) are made of different materials.

3. The battery as described in claim 2, characterized in that, The material of the first connecting part (11) includes aluminum, and the material of the second connecting part (12) includes copper.

4. The battery as described in claim 3, characterized in that, The second connection part (12) includes multiple stacked copper sheets.

5. The battery as described in claim 4, characterized in that, The thickness of each copper sheet is 0.1 to 0.5 mm.

6. The battery as described in any one of claims 1 to 5, characterized in that, The first connecting part (11) is provided with a stepped first connecting structure at both ends, and each second connecting part (12) is provided with a stepped second connecting structure that cooperates with the first connecting structure at the end near the first connecting part (11); The first connecting part (11) and the second connecting part (12) are connected by the first connecting structure and the second connecting structure, so that the surface of the first connecting part (11) perpendicular to the thickness direction is smoothly connected to the surface of the second connecting part (12) perpendicular to the thickness direction.

7. The battery as described in any one of claims 1 to 5, characterized in that, The beam structure (4) extends along a first direction (X) and is disposed between the first electrical component (2) and the second electrical component (3) along a second direction (Y) perpendicular to the first direction (X); The first connecting part (11) forms a clearance space (110) to avoid the beam structure (4) by bending relative to the second connecting part (12).

8. The battery as claimed in claim 7, characterized in that, The first connecting part (11) includes a first clearance structure (111) disposed along the second direction (Y) on one side of the beam structure (4), a second clearance structure (112) disposed along the second direction (Y) on the other side of the beam structure (4), and a third clearance structure (113) connected to the first clearance structure (111) and the second clearance structure (112) respectively. The third clearance structure (113) is disposed along the third direction (Z) on one side of the beam structure (4). The first clearance structure (111) and the second clearance structure (112) are bent relative to the third clearance structure (113) and the second connecting part (12). Wherein, the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y).

9. The battery as claimed in claim 8, characterized in that, The second avoidance structure (112) has an avoidance substructure that bends in a plane perpendicular to the second direction (Y), the avoidance substructure at least partially overlapping the projection of the first avoidance structure (111) in a plane perpendicular to the second direction (Y).

10. The battery as described in any one of claims 1 to 5, characterized in that, Also includes: A power distribution device is installed inside the battery casing, and the second electrical component (3) includes a relay installed inside the power distribution device; The first electrical component (2) includes a connector, which is at least partially disposed outside the casing of the battery.

11. The battery as claimed in claim 10, characterized in that, The second connecting part (12) includes: Connection structure (120) for connection with the first connection terminal or the second connection terminal; and / or The constraint structure (121), spaced apart from the connection structure (120), is configured as a constraint harness.

12. An electrical appliance, characterized in that, include: The battery (10) as described in any one of claims 1 to 11 is used to provide electrical energy.

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