Battery and electric device

Abstract

The utility model provides a battery and an electric device. The battery comprises a box body, a battery monomer and a tensioning piece, the box body is provided with an accommodating space; the battery monomers are accommodated in the accommodating space, and the plurality of battery monomers are at least arranged along a first direction; the tensioning part is arranged on one side of the plurality of single batteries along the second direction and extends along the first direction, two ends of the tensioning part along the first direction are respectively connected to the box body, and the first direction is intersected with the second direction. According to the battery provided by the invention, the tensioning force of the tensioning part on the box body and the outward expansive force of the battery monomer on the box body are mutually counterbalanced, so that outward deformation of the box body in the first direction is inhibited, the risk of structural failure caused by cracking of the box body due to expansive deformation of the battery monomer is reduced, the structural stability of the box body is improved, and the service life of the battery is prolonged. And the reliability 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] Batteries are widely used in electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] In the development of battery technology, in addition to improving the performance of batteries, the reliability of batteries is also an issue that needs to be considered. Therefore, how to improve the reliability of batteries is an issue of continuous improvement in battery technology. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device, which can improve the reliability of the battery.

[0005] In a first aspect, the present application provides a battery comprising a case, a battery cell and a tensioning member; the case has a accommodating space; the battery cell is accommodated in the accommodating space, and a plurality of battery cells are arranged at least along a first direction; the tensioning member is arranged on one side of the plurality of battery cells along a second direction, and extends along the first direction, and both ends of the tensioning member along the first direction are respectively connected to the case, and the first direction intersects with the second direction.

[0006] The battery provided in the embodiment of the present application is provided with a tensioning member extending along a first direction, and the two ends of the tensioning member along the first direction are respectively connected to the box body, so that the tensioning member generates a tensioning force inward on both sides of the box body along the first direction, that is, toward the inside of the accommodating space. The tensioning force of the tensioning member on the box body and the outward expansion force of the battery cell on the box body counteract each other, which is beneficial to suppressing the outward deformation of the box body along the first direction, reducing the risk of cracking of the box body due to expansion deformation of the battery cell and then structural failure, which is beneficial to improving the structural stability of the box body, and thus improving the reliability of the battery.

[0007] In some embodiments, the tensioning member is pressed against the battery cell, which is advantageous for suppressing the expansion force of the battery cell through the tensioning member and reducing the expansion deformation of the battery cell.

[0008] In some embodiments, the tensioning member is bonded to the surface of the battery cell on one side along the second direction. Such a configuration is conducive to further suppressing the expansion of the battery cell and reducing the risk of the battery cell expanding and tilting outward along the first direction, thereby reducing the risk of the box body cracking due to the expansion of the battery cell.

[0009] In some embodiments, the box includes a first box portion and a second box portion, and the first box portion and the second box portion overlap each other along the second direction to form an accommodating space; the two ends of the tensioning member along the first direction are respectively connected to the second box portion, and at least a portion of the tensioning member facing away from the battery cell is connected to the first box portion. By connecting the tensioning member to the first box portion, the connection strength between the first box portion and the second box portion is improved, thereby improving the overall structural strength and stability of the box, and helping to reduce the risk of vibration and abnormal noise of the first box portion relative to the second box portion or the battery cell during operation of the battery.

[0010] In some embodiments, at least a portion of the tensioning member on the side facing away from the battery cell is bonded to the first box body. In this way, while reducing the risk of vibration or abnormal noise of the first box body relative to the battery cell or the second box body, it is also helpful to simplify the connection process between the first box body and the tensioning member. Since the bonding connection does not require drilling holes in the first box body, it is helpful to improve the sealing performance of the internal accommodating space of the box body.

[0011] In some embodiments, the second box body includes a box body and an expansion beam, the expansion beam is arranged on one side of the box body facing the accommodating space, a plurality of battery cells arranged in the first direction are sandwiched between the expansion beams, and the two ends of the tensioning member along the first direction are connected to the expansion beams. The deformation of the expansion beam can be used to buffer the elastic deformation of the battery cell, and the tensioning force of the tensioning member on the expansion beam can be used to counteract the expansion force of the battery cell, which is conducive to reducing the expansion amount of the battery cell and reducing the deformation amount of the second box body caused by the expansion of the battery cell toward the outside of the accommodating space, thereby improving the structural stability of the box.

[0012] In some embodiments, the first box body has a protrusion protruding toward the battery cell, and the protrusion is bonded to the tension piece. The protrusion is bonded to the tension piece, which is convenient for bonding and connecting with the tension piece, and reduces the risk of vibration and abnormal sound of the first box body relative to the second box body or the battery cell, which is conducive to simplifying the connection structure of the first box body and the tension piece and improving the convenience of connecting the first box body and the tension piece.

[0013] In some embodiments, the protrusions extend along the first direction, the first housing has a plurality of protrusions arranged at intervals, and there is a clearance groove between two adjacent protrusions; the battery cell includes a shell and an electrode terminal, the electrode terminal is arranged on the side of the shell facing the tensioner along the second direction, and the positive projection of the electrode terminal on the first housing along the second direction is located in the clearance groove. This is conducive to improving the connection convenience between the first housing and the tensioner, and is convenient for realizing the series or parallel connection of different battery cells, reducing the risk of spatial interference between the first housing and the relevant connecting components of the battery cell.

[0014] In some embodiments, the battery includes a plurality of battery cell strings, the battery cell strings include a plurality of battery cells arranged along a first direction, the plurality of battery cell strings are arranged along a third direction, a tensioning member is pressed on two battery cell strings adjacent to each other along the third direction, and the first direction, the second direction and the third direction intersect each other. In this way, a tensioning member is pressed on two battery cell strings adjacent to each other along the third direction, and the expansion amount of the two battery cell strings adjacent to each other along the third direction can be reduced by a tensioning member, which is conducive to reducing the number of tensioning members, thereby simplifying the overall structure of the battery.

[0015] In some embodiments, the tensioning member includes a metal strip and an insulating portion, the metal strip extending along a first direction, and at least a portion of the insulating portion being disposed on the outer periphery of the battery cell and the metal strip, so that the metal strip and the battery cell are insulated. This arrangement is conducive to improving the tensile strength of the tensioning member along the first direction, and does not affect the normal operation of the battery.

[0016] In some embodiments, the insulating portion is wrapped around the outer circumference of the metal strip. Such a configuration, while achieving the insulation performance between the metal strip and the battery cell, is also conducive to achieving the insulation configuration between the metal strip and related connecting components such as the busbar in the battery, which is conducive to reducing the risk of short circuit inside the battery caused by the electrical connection between the metal strip and the related internal structure of the battery, and further conducive to improving the reliability of the battery.

[0017] In some embodiments, the tensioning member further includes a pad, and the insulating portion is provided at both ends of the metal strip along the first direction, and the pad connects the box body and the metal strip, thereby reducing the risk of bending of the metal strip, which is beneficial to increasing the tensioning force of the tensioning member along the first direction and the tensile strength of the tensioning member.

[0018] In some embodiments, the battery further comprises an adhesive layer, and the insulating portion has a first groove on one side facing the battery cell, and at least a portion of the adhesive layer is accommodated in the first groove to bond and connect the insulating portion and the battery cell. This is beneficial to increasing the connection area between the adhesive layer and the insulating portion, and the first groove is used to limit the adhesive layer, which is beneficial to increasing the connection strength between the battery cell and the tensioning member.

[0019] In some embodiments, the insulating portion has a second groove on the side facing away from the battery cell, and at least part of the adhesive layer is accommodated in the second groove to bond the box body and the tensioning member. The second groove can increase the bonding area between the adhesive layer and the insulating portion, and the second groove can provide a certain limit to the adhesive layer, which is conducive to improving the connection strength between the tensioning member and the box body.

[0020] In some embodiments, the side of the battery cell facing away from the tensioning member is bonded to the box body. This arrangement can reduce the expansion of the side of the battery cell facing away from the tensioning member, thereby reducing the force exerted by the side of the battery cell facing away from the tensioning member on the box body, which is beneficial to further reduce the deformation of the box body and improve the structural stability of the box body.

[0021] In a second aspect, an embodiment of the present application provides an electrical device, including the battery provided in the above embodiment, and the battery is used to provide electrical energy.

[0022] The electric device provided in the embodiment of the present application has the same technical effect as the battery provided in the above embodiment, and thus will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the structure of a battery module in a battery provided in an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the explosion structure of a battery cell in a battery provided in an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the structure of another battery provided in an embodiment of the present application;

[0029] Figure 6 is a front view of a battery provided in an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of a partial cross-sectional structure of a battery provided in an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of the structure of a tensioning member in a battery provided in an embodiment of the present application;

[0032] Fig. 9 yes Figure 8 A partial enlarged view of the middle A;

[0033] Fig.10is a schematic diagram of the exploded structure of a tensioning member in a battery provided in an embodiment of the present application;

[0034] Fig.11 It is a front view of the tensioning member in the battery provided in the embodiment of the present application.

[0035] In the drawings, the drawings are not necessarily drawn to scale.

[0036] Description of reference numerals:

[0037] 1. Vehicle; 1a. Motor; 1b. Controller;

[0038] 10. Battery; 11. Box; 11a. Accommodation space; 111. First box portion; 111a. Protrusion; 111b. Air-avoiding groove; 112. Second box portion; 1121. Box body; 1122. Expansion beam;

[0039] 20. Battery module;

[0040] 30. Battery cell; 31. Shell; 31a. Accommodation cavity; 311. End cover; 312. Shell; 312a. First surface; 312b. Second surface; 32. Electrode assembly; 33. Electrode terminal;

[0041] 40. Battery cell string;

[0042] 50, tensioning member; 51, metal strip; 52, insulating portion; 52a, first groove; 52b, second groove; 53, spacer;

[0043] 60. Adhesive layer;

[0044] 70. Busbars;

[0045] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0046] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0047] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0048] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0050] The term "plurality" used in the present application refers to two or more (including two).

[0051] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0052] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0053] 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.

[0054] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0055] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0056] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0057] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0058] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0059] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0060] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium with silver surface treatment may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may 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 polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0061] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more.

[0062] In some embodiments, the positive electrode may be foamed carbon or foamed metal. The foamed metal may be foamed nickel, foamed copper, foamed aluminum or foamed alloy. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or lithium-rich material.

[0063] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0064] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, silver surface treated stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0065] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0066] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0067] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc.

[0068] In some embodiments, the negative electrode may be foamed carbon or foamed metal. The foamed metal may be foamed nickel, foamed copper, foamed aluminum or foamed alloy, etc. When the foamed metal is used as the negative electrode sheet, the surface of the foamed metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.

[0069] As an example, a lithium source material, potassium metal or sodium metal may be filled or / and deposited in the negative electrode current collector, and the lithium source material is lithium metal and / or lithium-rich material.

[0070] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0071] In some embodiments, the electrode assembly further includes a separator, which is disposed between the positive electrode and the negative electrode. The present application has no particular limitation on the type of separator, and any known porous separator with good chemical stability and mechanical stability can be selected.

[0072] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0073] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0074] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0075] In some embodiments, the electrode assembly is a laminate structure.

[0076] A plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets can be alternately stacked.

[0077] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0078] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0079] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0080] As an example, the separator may be disposed continuously, and disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0081] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0082] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0083] The battery cell further includes a housing, and a housing is formed inside the housing to accommodate the electrode assembly. The housing can protect the electrode assembly from the outside to prevent external foreign matter from affecting the charging or discharging of the electrode assembly.

[0084] In the related art, the battery cells are contained in a box. During the cycle operation, the battery cells will inevitably generate a certain expansion force and corresponding expansion deformation. The expansion force and expansion deformation of the battery cells accumulate with each other and act on the box on both sides of the corresponding battery cells along the expansion direction, so that the box is subjected to a certain expansion force and produces a certain deformation. This can easily cause the box to crack, and then cause the structural failure of the box, seriously affecting the reliability of the battery.

[0085] In view of this, an embodiment of the present application provides a technical solution, which extends along a first direction through a tensioning member and is arranged on one side of multiple battery cells along a second direction, and the two ends of the tensioning member along the first direction are respectively connected to the box body. The tensioning member counteracts the expansion force and expansion deformation of the battery cells, and applies a force in the opposite direction of the expansion force to the multiple battery cells to suppress the expansion of the battery cells, reduce the deformation of the box body caused by the expansion of the battery cells, and thereby reduce the risk of cracking of the box body, which is beneficial to improving the structural stability of the box body and the reliability of the battery cells.

[0086] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0087] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, 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, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0088] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0089] like Figure 1 As shown, a battery 10 is provided inside the vehicle 1. The battery 10 may be provided at the bottom, head, or tail of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1.

[0090] The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 to supply power to the motor 1a, for example, to meet the power requirements of the vehicle 1 during starting, navigation and driving.

[0091] In some embodiments of the present application, the battery 10 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0092] See also Figure 2 As shown, the battery 10 includes a battery cell ( Figure 2 (not shown) The battery 10 may further include a housing 11 for accommodating the battery cells.

[0093] The box 11 is used to accommodate battery cells, and the box 11 can be in various structural forms. In some embodiments, the box 11 may include a first box portion 111 and a second box portion 112. The first box portion 111 and the second box portion 112 cover each other. The first box portion 111 and the second box portion 112 jointly define a storage space for accommodating battery cells. The second box portion 112 may be a hollow structure with one end open, the first box portion 111 is a plate-like structure, and the first box portion 111 covers the open side of the second box portion 112 to form a box 11 with a storage space; the first box portion 111 and the second box portion 112 may also be hollow structures with one side open. The open side of the first box portion 111 covers the open side of the second box portion 112 to form a box 11 with a storage space. Of course, the first box portion 111 and the second box portion 112 may be in various shapes, such as a cylinder, a cuboid, etc.

[0094] In order to improve the sealing performance after the first box body 111 and the second box body 112 are connected, a sealing member, such as a sealant, a sealing ring, etc., may be further provided between the first box body 111 and the second box body 112 .

[0095] Assuming that the first box body portion 111 covers the second box body portion 112 , the first box body portion 111 can also be referred to as an upper box cover, and the second box body portion 112 can also be referred to as a lower box body.

[0096] In the battery 10, there can be one or more battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells can be accommodated in the box 11. Figure 3 As shown, multiple battery cells may be connected in series, in parallel or in mixed series to form a battery module 20. Multiple battery strings are then connected in series, in parallel or in mixed series to form a whole, and are accommodated in the box 11.

[0097] The battery 10 may also not have the box 11, but include multiple battery cells connected in series or in parallel. After the multiple battery cells are connected in series or in parallel, they are fixed by structures such as steel belts or binding straps, and then the multiple batteries 10 are connected in series or in parallel to form a new energy storage unit.

[0098] In some embodiments, multiple battery cells in the battery 10 may be electrically connected via a busbar component to achieve parallel connection, series connection, or mixed connection of the multiple battery cells in the battery 10 .

[0099] Please refer to Figure 4 The battery cell 30 provided in the embodiment of the present application includes an electrode assembly 32 and a shell 31 . The shell 31 has a receiving cavity 31 a , and the electrode assembly 32 is received in the receiving cavity 31 a .

[0100] The outer shell 31 may include a shell 312 and an end cover 311 . When assembling the battery cell 30 , the electrode assembly 32 may be placed in the accommodating cavity 31 a first, and then the end cover 311 may be covered on the shell 312 . Then, the electrolyte may be injected into the accommodating cavity 31 a through the electrolyte injection port on the end cover 311 .

[0101] In some embodiments, the housing 31 may also be used to contain electrolytes, such as electrolytes. The housing 31 may be in various structural forms.

[0102] The outer shell 31 can be in various shapes, such as a cylinder, a cuboid, etc. The shape of the outer shell 31 can be determined according to the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 is a cylindrical structure, the outer shell 31 can be a cylindrical structure. If the electrode assembly 32 is a cuboid structure, the outer shell 31 can be a cuboid structure. Figure 4 In the figure, illustratively, the housing and the electrode assembly 32 are both rectangular parallelepiped structures.

[0103] The shell 31 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0104] There may be one or more electrode assemblies 32 contained in the housing 31. Figure 4 In the embodiment, there are two electrode assemblies 32 housed in the housing 31.

[0105] like Figure 4 , Figure 5 and Figure 6As shown, the battery 10 provided according to the embodiment of the present application includes a box body 11, a battery cell 30 and a tensioning member 50, the box body 11 has a containing space 11a, the battery cell 30 is contained in the containing space 11a, and the plurality of battery cells 30 are arranged at least along the first direction X. The tensioning member 50 is disposed on one side of the plurality of battery cells 30 along the second direction Y, and extends along the first direction X, and the two ends of the tensioning member 50 along the first direction X are respectively connected to the box body 11, and the first direction X intersects with the second direction Y.

[0106] The box body 11 has a accommodating space 11a, and the box body 11 may include a first box body portion 111 and a second box body portion 112. The first box body portion 111 and the second box body portion 112 cover each other to form the accommodating space 11a. The first box body portion 111 and the second box body portion 112 may be respectively a groove-like structure with an opening on one side for use in a vehicle, or the first box body portion 111 is arranged in a plate shape, and the second box body portion 112 is a groove-like structure with an opening on one side.

[0107] The plurality of battery cells 30 are arranged at least along the first direction X. Alternatively, the plurality of battery cells 30 may be arranged in an array along the first direction X and a direction intersecting the first direction X.

[0108] The tensioning member 50 is disposed on one side of the plurality of battery cells 30 along the second direction Y. The tensioning member 50 may abut against the battery cells 30 , or the tensioning member 50 may be spaced apart from the battery cells 30 .

[0109] The number of tensioning members 50 may be one or more. For example, multiple battery cells 30 may be arranged in multiple columns along the first direction X. Then, multiple tensioning members 50 may be provided to correspond to the multiple columns of battery cells 30 one by one, or one tensioning member 50 may be provided to correspond to two adjacent columns of battery cells 30.

[0110] The battery cell 30 may include a housing 31 and an electrode terminal 33 disposed on the housing 31, and the tensioning member 50 may be disposed on a side of the housing 31 on which the electrode terminal 33 is disposed, or the tensioning member 50 may be disposed on a side surface of the housing 31 intersecting with a surface on which the electrode terminal 33 is disposed. In other words, the electrode terminal 33 may be disposed on a side of the housing 31 along the second direction Y, or the electrode terminal 33 may be disposed on a side of the housing 31 along the third direction Z, and the first direction X, the second direction Y, and the third direction Z intersect each other.

[0111] The electrode terminal 33 can be arranged on the side of the shell 31 along the second direction Y, and the shell 31 is arranged to have two first surfaces 312a opposite to each other along the first direction X and two second surfaces 312b opposite to each other along the third direction Z, the first surface 312a connects the two second surfaces 312b, and the area of ​​the first surface 312a is arranged to be larger than the area of ​​the second surface 312b, so that the battery cell 30 generates expansion force and expansion deformation mainly along the first direction X during the expansion process.

[0112] During the expansion process, the battery cell 30 generates an expansion force along the first direction X, and the expansion force acts on the box body 11 on both sides of the battery 10 along the first direction X, so that the box body 11 is subjected to a force outward along the first direction X, that is, toward the outside of the accommodating space 11a, and generates a deformation tendency outward along the first direction X. When the tensioning member 50 is connected to the box body 11 at both ends along the first direction X, the tensioning member 50 generates a tension inward along the first direction X on the box body 11 on both sides of the battery cell 30 along the first direction X. The tension of the tensioning member 50 on the box body 11 counteracts the expansion force of the battery cell 30 on the box body 11, which is conducive to suppressing the expansion deformation of the box body 11 outward along the first direction X.

[0113] In the battery 10 provided in the embodiment of the present application, a tensioning member 50 is provided to extend along the first direction X, and the two ends of the tensioning member 50 along the first direction X are respectively connected to the case 11, so that the tensioning member 50 generates a tensioning force inward on both sides of the case 11 along the first direction X, that is, toward the inside of the accommodating space 11a. The tensioning force of the tensioning member 50 on the case 11 and the outward expansion force of the battery cell 30 on the case 11 counteract each other, which is beneficial to suppressing the outward deformation of the case 11 along the first direction X, reducing the risk of cracking and structural failure of the case 11 due to the expansion deformation of the battery cell 30, and improving the structural stability of the case 11, thereby improving the reliability of the battery 10.

[0114] In some embodiments, the tensioning member 50 is pressed against the battery cell 30 .

[0115] The tensioning member 50 is pressed against the battery cell 30, and the tensioning member 50 exerts pressure on the battery cell 30 along the second direction Y. Alternatively, the tensioning member 50 may only abut against the battery cell 30 and exert pressure on the battery cell 30, or the tensioning member 50 may also be connected to the battery cell 30.

[0116] In this way, when the battery cell 30 expands during the cyclic operation, the tensioning member 50 generates a certain tensioning force on the battery cell 30 on which it is pressed. The tensioning force of the tensioning member 50 on the battery cell 30 and the expansion force of the battery cell 30 itself counteract each other, which is beneficial to reduce the expansion amount of the corresponding battery cell 30.

[0117] Therefore, disposing the tensioning member 50 to be pressed against the battery cell 30 is beneficial for suppressing the expansion force of the battery cell 30 through the tensioning member 50 and reducing the expansion deformation of the battery cell 30 .

[0118] In some embodiments, the tensioning member 50 is adhesively connected to a surface of the battery cell 30 along one side of the second direction Y.

[0119] By providing the tensioning member 50 to be bonded and connected to the surface of the battery cell 30 on one side along the second direction Y, the risk of the battery cell 30 bonded to the tensioning member 50 tilting outward along the first direction X under the action of the expansion force of other adjacent battery cells 30 during the expansion process of the battery cell 30 is reduced, which is beneficial to further suppress the expansion of the battery cell 30 and reduce the risk of the battery cell 30 expanding and tilting outward along the first direction X, thereby reducing the risk of the box 11 cracking due to the expansion of the battery cell 30.

[0120] like Figure 7 As shown, in some embodiments, the box body 11 includes a first box body portion 111 and a second box body portion 112, and the first box body portion 111 and the second box body portion 112 overlap each other along the second direction Y to form an accommodating space 11a. Both ends of the tensioning member 50 along the first direction X are respectively connected to the second box body portion 112, and at least a portion of the tensioning member 50 facing away from the battery cell 30 is connected to the first box body portion 111.

[0121] The side of the tensioning member 50 facing away from the battery cell 30 is connected to the first box body portion 111 , and the connection between the tensioning member 50 and the first box body portion 111 may be an adhesive connection, a threaded connection, a pin connection, or the like.

[0122] In this way, the first box body 111 can be in a plate shape. The side of the tensioning member 50 facing away from the battery cell 30 is at least partially connected to the first box body 111. Through the connection between the tensioning member 50 and the first box body 111, the connection strength between the first box body 111 and the second box body 112 is improved, thereby improving the overall structural strength and stability of the box body 11, and helping to reduce the risk of vibration and abnormal noise of the first box body 111 relative to the second box body 112 or the battery cell 30 during the operation of the battery 10.

[0123] In some embodiments, at least a portion of the side of the tensioning member 50 facing away from the battery cell 30 is adhesively connected to the first box portion 111 .

[0124] Optionally, the entire side of the tensioning member 50 facing away from the battery cell 30 may be bonded to the first box body 111, that is, the tensioning member 50 and the first box body 111 are bonded in a strip extending along the first direction X. Alternatively, a portion of the side of the tensioning member 50 facing away from the battery cell 30 is bonded to the first box body 111, and illustratively, the tensioning member 50 and the first box body 111 are bonded in a point-shaped or block-shaped manner.

[0125] The tensioning member 50 is connected to the first box body portion 111 by adhesive connection. This can reduce the risk of vibration or abnormal noise of the first box body portion 111 relative to the battery cell 30 or the second box body portion 112, and can also simplify the connection process between the first box body portion 111 and the tensioning member 50. Since the adhesive connection does not require drilling holes in the first box body portion 111, it is beneficial to improve the sealing performance of the internal accommodating space 11a of the box body 11.

[0126] like Figure 5 As shown, in some embodiments, the second box body portion 112 includes a box body 1121 and an expansion beam 1122, the expansion beam 1122 is arranged on the side of the box body 1121 facing the accommodating space 11a, a plurality of battery cells 30 arranged in the first direction X are clamped between the expansion beams 1122, and the tensioning member 50 is connected to the expansion beam 1122 at both ends along the first direction X.

[0127] In this way, during the expansion of the battery cell 30, a force is generated on the expansion beam 1122 facing away from the accommodating space 11a. The elastic deformation of the expansion beam 1122 can be used to buffer part of the deformation of the battery cell 30, and as the expansion deformation of the battery cell 30 recovers, the expansion beam 1122 gradually recovers its deformation.

[0128] The two ends of the tensioning member 50 along the first direction X are connected to the expansion beam 1122 , and the tensioning force of the tensioning member 50 on the expansion beam 1122 is used to reduce the outward deformation of the expansion beam 1122 , thereby reducing the outward deformation of the second box portion 112 as a whole.

[0129] Therefore, the second box body 112 is provided including a box body 1121 and an expansion beam 1122. The deformation of the expansion beam 1122 can be used to buffer the elastic deformation of the battery cell 30, and the tensioning force of the expansion beam 1122 by the tensioning member 50 can be used to counteract the expansion force of the battery cell 30, which is beneficial to reduce the expansion amount of the battery cell 30 and reduce the deformation amount of the second box body 112 toward the outside of the accommodating space 11a caused by the expansion of the battery cell 30, thereby improving the structural stability of the box body 11.

[0130] like Figure 5As shown, in some embodiments, the first box body 111 has a protrusion 111a protruding toward the battery cell 30, and the protrusion 111a is connected to the tension member 50. The protrusion 111a may be in a strip, block or other suitable form. The first box body 111 is provided with a protrusion 111a protruding toward the battery cell 30, so as to facilitate connection with the tension member 50 through the protrusion 111a. Under the premise of reducing the risk of vibration and abnormal sound of the first box body 111 relative to the second box body 112 or the battery cell 30, it is helpful to simplify the connection structure of the first box body 111 and the tension member 50, and improve the convenience of connecting the first box body 111 and the tension member 50.

[0131] like Figure 5 As shown, in some embodiments, the protrusion 111a extends along the first direction X, the first housing portion 111 has a plurality of protrusions 111a arranged at intervals, and a clearance groove 111b is provided between two adjacent protrusions 111a. The battery cell 30 includes a housing 31 and an electrode terminal 33, the electrode terminal 33 is provided on one side of the housing 31 facing the tensioning member 50 along the second direction Y, and the orthographic projection of the electrode terminal 33 on the first housing portion 111 along the second direction Y is located in the clearance groove 111b.

[0132] The protrusions 111a extend along the first direction X, and the avoidance grooves 111b between the protrusions 111a may also extend along the first direction X. The protrusions 111a are arranged to extend along the first direction, and a suitable position of the protrusions 111a along the first direction X can be selected to be connected to the tensioning member 50, which is conducive to improving the connection convenience between the first box body 111 and the tensioning member 50.

[0133] The electrode terminals 33 of different battery cells 30 are connected in series or in parallel with each other through the busbar 70. By arranging the orthographic projection of the electrode terminal 33 along the second direction Y in the first box body 111 to be located in the air avoidance groove 111b, it is convenient to reserve space for structural parts such as the busbar 70 through the air avoidance groove 111b, so as to facilitate the series or parallel connection of different battery cells 30 and reduce the risk of spatial interference between the first box body 111 and related connecting components such as the busbar 70 of the battery cell 30.

[0134] like Figure 5 and Figure 6 As shown, in some embodiments, the battery 10 includes a plurality of battery cell strings 40, the battery cell strings 40 include a plurality of battery cells 30 arranged along a first direction X, the plurality of battery cell strings 40 are arranged along a third direction Z, a tensioning member 50 is pressed on two adjacent battery cell strings 40 along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0135] In this way, a tensioning member 50 is pressed against two battery cell strings 40 adjacent along the third direction Z. Then, the expansion amount of the two battery cell strings 40 adjacent along the third direction Z can be reduced by the tensioning member 50, which is beneficial to reduce the number of tensioning members 50 and further simplify the overall structure of the battery 10.

[0136] Optionally, any two battery cell strings 40 adjacent to each other along the second direction Y may be provided with a corresponding tensioning member 50 , or two adjacent battery cell strings 40 in some battery cell strings 10 may be provided with corresponding tensioning members 50 .

[0137] like Figure 8 and Fig. 9 As shown, in some embodiments, the tensioning member 50 includes a metal strip 51 and an insulating portion 52 , the metal strip 51 extends along the first direction X, and at least a portion of the insulating portion 52 is disposed between the battery cell 30 and the metal strip 51 to insulate the metal strip 51 from the battery cell 30 .

[0138] The tensioning member 50 includes a metal strip 51 , which can improve the tensile strength of the tensioning member 50 , and an insulating portion 52 is disposed between the battery cell 30 and the metal strip 51 to achieve insulation between the metal strip 51 and the battery cell 30 , thereby reducing the risk of internal short circuit in the battery 10 .

[0139] Therefore, the tensioning member 50 includes a metal strip 51 and an insulating portion 52 , which is beneficial to improving the tensile strength of the tensioning member 50 along the first direction X and will not affect the normal operation of the battery 10 .

[0140] like Figure 8 and Fig. 9 As shown, in some embodiments, the insulating portion 52 is wrapped around the outer circumference of the metal strip 51 .

[0141] By providing an insulating portion 52 wrapped around the outer circumference of the metal strip 51, while achieving insulation performance between the metal strip 51 and the battery cell 30, it is also beneficial to achieve insulation between the metal strip 51 and related connecting components such as the busbar 70 in the battery 10, which is beneficial to reducing the risk of internal short circuit of the battery 10 caused by electrical connection between the metal strip 51 and related internal structures of the battery 10, and is further beneficial to improving the reliability of the battery 10.

[0142] like Figure 8 and Fig. 9 As shown, in some embodiments, the tensioning member 50 further includes a spacer 53 , and the insulating portions 52 are protruding from both ends of the metal strip 51 along the first direction X, and the spacer 53 connects the box body 11 and the metal strip 51 .

[0143] The spacer 53 connects the box 11 and the metal strip 51, and the size of the spacer 53 can be set to achieve the connection between the metal strip 51 and the box 11 through the spacer 53. In the embodiment where the tensioning member 50 is connected to the second box portion 112, the spacer 53 connects the metal strip 51 and the second box portion 112.

[0144] In this way, the metal strip 51 of the tensioning member 50 can extend along the first direction X, reducing the risk of bending of the metal strip 51 , which is beneficial to increasing the tensioning force of the tensioning member 50 along the first direction X and improving the tensile strength of the tensioning member 50 .

[0145] like Fig.10 and Fig.11 As shown, in some embodiments, the battery 10 further includes an adhesive layer 60 , and the insulating portion 52 has a first groove 52 a on one side facing the battery cell 30 , and at least a portion of the adhesive layer 60 is accommodated in the first groove 52 a to bond and connect the insulating portion 52 and the battery cell 30 .

[0146] Optionally, the adhesive layer between the insulating portion 52 and the battery cell 30 may be completely accommodated in the first groove 52 a , or partially accommodated in the first groove 52 a .

[0147] The adhesive layer 60 realizes the adhesive connection between the battery cell 30 and the tensioning member 50, which is beneficial to reducing the expansion deformation of the battery cell 30. The insulating portion 52 is provided with a first groove 52a on one side facing the battery cell 30, and at least part of the adhesive layer is provided to be accommodated in the first groove 52a, which is beneficial to increasing the connection area between the adhesive layer and the insulating portion 52, and the first groove 52a is used to limit the adhesive layer 60, which is beneficial to improving the connection strength between the battery cell 30 and the tensioning member 50.

[0148] like Fig.10 and Fig.11 As shown, in some embodiments, the insulating portion 52 has a second groove 52 b on a side facing away from the battery cell 30 , and at least a portion of the adhesive layer 60 is accommodated in the second groove 52 b to bond and connect the box body 11 and the tensioning member 50 .

[0149] The insulating portion 52 is bonded to the box body 11, which is beneficial to improving the connection strength of the box body 11 and reducing the risk of abnormal noise of the box body 11. The second groove 52b can increase the bonding area between the adhesive layer 60 and the insulating portion 52, and the second groove 52b can provide a certain limit effect on the adhesive layer 60, which is beneficial to improving the connection strength between the tensioning member 50 and the box body 11.

[0150] In some embodiments, the side of the battery cell 30 facing away from the tensioning member 50 is adhesively connected to the box body 11 .

[0151] In this way, during the expansion of the battery cell 30, the adhesive connection between the side of the battery cell 30 facing away from the tensioning member 50 and the box body 11 can reduce the expansion amount of the side of the battery cell 30 facing away from the tensioning member 50, thereby reducing the force exerted on the box body 11 by the side of the battery cell 30 facing away from the tensioning member 50, which is beneficial to further reduce the deformation of the box body 11 and improve the structural stability of the box body 11.

[0152] The electrical device provided according to an embodiment of the present application includes the battery 10 provided in any of the above embodiments, and the battery 10 is used to provide electrical energy.

[0153] The electric device provided in the embodiment of the present application has the same technical effect as the battery 10 provided in any of the above embodiments, and thus will not be described in detail here.

[0154] like Figures 4 to 11As shown, in some embodiments, the battery 10 includes a box body 11, a battery cell 30, an adhesive layer 60 and a tensioning member 50. The box body 11 includes a first box body portion 111 and a second box body portion 112. The first box body portion 111 and the second box body portion 112 overlap each other along the second direction Y to form an accommodating space 11a. The battery cell 30 is accommodated in the accommodating space 11a. A plurality of battery cells 30 are arranged along the first direction X to form a battery cell string 40. The plurality of battery cell strings 40 are arranged along the third direction Z. The second box body portion 112 includes a box body 1121 and an expansion beam 1122. The expansion beam 1122 is disposed on one side of the box body 1121 facing the accommodating space 11a. The plurality of battery cell strings 40 are sandwiched between the expansion beams 1122. The tensioning member 50 is disposed on one side of two adjacent battery cell strings 40 along the second direction Y and is adhesively connected to the two adjacent battery cell strings 40. The tensioning member 50 extends along the first direction X, and the two ends of the tensioning member 50 along the first direction X are respectively connected to the expansion beam 1122 through the pads 53. The first direction X, the second direction Y and the third direction Z intersect each other. The first box body 111 has a plurality of protrusions 111a arranged at intervals and a clearance groove 111b formed between the protrusions 111a. The battery cell 30 includes a shell 31 and an electrode terminal 33. The electrode terminal 33 is arranged on the side of the shell 31 facing the tensioning member 50, and the positive projection of the electrode terminal 33 in the first box body 111 is located in the clearance groove 111b. The tensioning member 50 includes a metal strip 51 and an insulating portion 52. The metal strip extends along the first direction X, and the insulating portion 52 is wrapped around the outer peripheral side of the metal strip 51 to insulate the metal strip 51 from the battery cell 30. The two ends of the metal strip 51 along the first direction X protrude from the insulating portion 52, and the pads 53 connect the expansion beam 1122 and the metal strip 51. The insulating portion 52 has a first groove 52a on the side facing the battery cell 30, and at least a portion of the adhesive layer 60 is accommodated in the first groove 52a to bond the insulating portion 52 and the battery cell 30. The insulating portion 52 has a second groove 52b on the side facing away from the battery cell 30, and at least a portion of the adhesive layer 60 is accommodated in the second groove 52b to bond the first box portion 111 and the tensioning member 50. The side of the battery cell 30 facing away from the tensioning member 50 is bonded to the second box portion 112.

[0155] In the battery 10 provided in the embodiment of the present application, a tensioning member 50 is provided to extend along the first direction X, and the two ends of the tensioning member 50 along the first direction X are respectively connected to the case 11, so that the tensioning member 50 generates a tensioning force inward on both sides of the case 11 along the first direction X, that is, toward the inside of the accommodating space 11a. The tensioning force of the tensioning member 50 on the case 11 and the outward expansion force of the battery cell 30 on the case 11 counteract each other, which is beneficial to suppressing the outward deformation of the case 11 along the first direction X, reducing the risk of cracking and structural failure of the case 11 due to the expansion deformation of the battery cell 30, and improving the structural stability of the case 11, thereby improving the reliability of the battery 10.

[0156] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: A box body having a containing space; A battery cell is accommodated in the accommodation space, and a plurality of the battery cells are arranged at least along a first direction; The tensioning member is arranged on one side of the plurality of battery cells along the second direction and extends along the first direction. Both ends of the tensioning member along the first direction are respectively connected to the box body. The first direction intersects with the second direction.

2. The battery according to claim 1, characterized in that The tensioning member is pressed on the battery cell.

3. The battery according to claim 2, characterized in that The tensioning member is bonded to a surface of the battery cell on one side along the second direction.

4. The battery according to any one of claims 1 to 3, characterized in that: The box body includes a first box body part and a second box body part, and the first box body part and the second box body part overlap each other along the second direction to form the accommodating space; the two ends of the tensioning member along the first direction are respectively connected to the second box body part, and at least a portion of the tensioning member facing away from the battery cell is connected to the first box body part.

5. The battery according to claim 4, characterized in that At least a portion of a side of the tensioning member facing away from the battery cell is adhesively connected to the first box portion.

6. The battery according to claim 4, characterized in that The second box body includes a box body and an expansion beam, the expansion beam is arranged on a side of the box body facing the accommodating space, a plurality of battery cells arranged in the first direction are clamped between the expansion beams, and the tensioning member is connected to the expansion beams at both ends along the first direction.

7. The battery according to claim 4, characterized in that The first box body has a protrusion protruding toward the battery cell, and the protrusion is connected to the tensioning member.

8. The battery according to claim 7, characterized in that The protrusions extend along the first direction, the first box body has a plurality of protrusions arranged at intervals, and a clearance groove is provided between two adjacent protrusions; The battery cell comprises a shell and an electrode terminal, wherein the electrode terminal is arranged on a side of the shell facing the tensioning member along the second direction, and an orthographic projection of the electrode terminal on the first box body along the second direction is located in the air avoidance groove.

9. The battery according to claim 1, characterized in that The battery includes a plurality of battery cell strings, the battery cell strings include a plurality of battery cells arranged along the first direction, the plurality of battery cell strings are arranged along a third direction, a tensioning member is pressed on two adjacent battery cell strings along the third direction, and the first direction, the second direction and the third direction intersect each other.

10. The battery according to claim 1, characterized in that The tensioning member includes a metal strip and an insulating portion. The metal strip extends along the first direction. At least a portion of the insulating portion is disposed between the battery cell and the metal strip, so that the metal strip is insulated from the battery cell.

11. The battery according to claim 10, characterized in that The insulating portion is wrapped around the outer circumference of the metal strip.

12. The battery according to claim 10 or 11, characterized in that: The tensioning member further includes a cushion block, and both ends of the metal strip along the first direction are protruding from the insulating portion, and the cushion block connects the box body and the metal strip.

13. The battery according to claim 10, characterized in that The battery further includes an adhesive layer, the insulating portion has a first groove on one side facing the battery cell, and at least a portion of the adhesive layer is accommodated in the first groove to adhesively connect the insulating portion and the battery cell; And / or, the insulating portion has a second groove on a side facing away from the battery cell, and at least a portion of the adhesive layer is accommodated in the second groove to adhesively connect the box body and the tensioning member.

14. The battery according to claim 1, characterized in that The side of the battery cell facing away from the tensioning member is adhesively connected to the box.

15. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 14, wherein the battery is used to provide electrical energy.

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