Battery and electric device

Abstract

A battery (2) comprises a plurality of battery groups (10) and a plurality of straps (20), wherein the plurality of battery groups (10) are arranged in a first direction, and each battery group (10) comprises a plurality of battery cells (11) which are stacked in a second direction, the second direction intersecting the first direction. At least part of each strap (20) is arranged on side surfaces of at least one battery group (10) in the first direction and are used for restricting the plurality of battery cells (11) in the at least one battery group (10); and at least two straps (20) extend between adjacent battery groups (10) and are used for restricting the adjacent battery groups (10), and the at least two straps (20) do not overlap in the first direction but overlap in a third direction, the third direction being perpendicular to the first direction and the second direction.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202321899640.1, filed on July 19, 2023, entitled “Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of batteries, and in particular to a battery and an electrical device. Background Art

[0004] With the development of battery technology, batteries are being used in a growing number of fields and are gradually replacing traditional fossil fuels in the automotive power sector. Batteries store chemical energy and controllably convert it into electrical energy. In recyclable batteries, after discharge, the active materials can be reactivated by recharging for continued use.

[0005] How to improve the energy density of batteries is an important research direction in the industry.

[0006] Summary of the Invention

[0007] The present application provides a battery and an electrical device, which can improve the energy density of the battery.

[0008] In a first aspect, the present application provides a battery comprising a plurality of battery packs and a plurality of cable ties. The plurality of battery packs are arranged along a first direction, and each battery pack comprises a plurality of battery cells stacked along a second direction, where the second direction intersects the first direction. At least a portion of the cable ties is disposed on a side surface of at least one battery pack along the first direction and is used to constrain the plurality of battery cells of the at least one battery pack. At least two cable ties pass between adjacent battery packs and are used to constrain the adjacent battery packs, and the at least two cable ties do not overlap in the first direction and overlap in a third direction, where the third direction is perpendicular to the first and second directions.

[0009] In the embodiments of the present application, the cable ties are small and lightweight. Using the cable ties to bind the battery packs effectively saves space and weight, thereby increasing the battery's energy density. The cable ties passing between two adjacent battery packs do not overlap in the first direction. Therefore, when the two battery packs are arranged along the first direction, the cable ties passing between the two adjacent battery packs can avoid each other in the first direction. However, the cable ties passing between the two adjacent battery packs overlap in the third direction, allowing the cable ties passing between the two adjacent battery packs to share a portion of the space in the first direction, thereby improving the battery's space utilization in the first direction and increasing the battery's energy density.

[0010] In some embodiments, a cable tie is disposed around the periphery of at least one battery pack to bind multiple battery cells of the battery pack from the periphery, thereby reducing the risk of the multiple battery cells of the battery pack being separated and improving the reliability of the battery.

[0011] In some embodiments, a cable tie is wrapped around the periphery of a battery pack and is used to restrain a plurality of battery cells of the corresponding battery pack. At least one cable tie is wrapped around the periphery of each battery pack.

[0012] Battery cells expand during charging, and cable ties need to restrain multiple battery cells and withstand the expansion force of multiple battery cells. In the embodiment of the present application, one cable tie is only used to restrain one battery pack. This can reduce the force on the cable tie during battery charging, reduce the risk of cable tie breakage, and improve battery reliability.

[0013] In some embodiments, at least one cable tie is wrapped around the periphery of two or more battery packs. Provided the tie's strength meets requirements, a single cable tie can be used to simultaneously secure two or more battery packs. This saves material, reduces the space and weight occupied by the tie, and improves the battery's energy density.

[0014] In some embodiments, the battery further comprises a first end plate and a second end plate disposed opposite each other along a second direction, wherein at least one battery pack is disposed between the first end plate and the second end plate. A cable tie is connected to the first end plate and the second end plate so that the first end plate and the second end plate clamp the at least one battery pack from both sides.

[0015] The cable tie clamps the battery pack through the first end plate and the second end plate to improve the uniformity of force applied to the battery cells and reduce local deformation of the battery cells.

[0016] In some embodiments, the cable tie includes a first end and a second end opposite to each other along a second direction, the first end and the second end being connected to the first end plate and the second end plate, respectively. Embodiments of the present application can save space and weight occupied by the cable tie and improve the energy density of the battery.

[0017] In some embodiments, a battery includes multiple battery modules arranged along a first direction. Each battery module includes a first end plate, a second end plate, a battery pack, and at least one cable tie. The battery pack is arranged between the first and second end plates, and the cable tie surrounds the first and second end plates, the battery pack, and the battery pack. The cable ties of two adjacent battery modules do not overlap in the first direction but overlap in the third direction.

[0018] Each battery pack is provided with a first end plate, a second end plate and a cable tie, which can improve the overall structural strength, enhance the stability of multiple battery cells in each battery pack, reduce the force on the cable tie during the charging process of the battery cell, reduce the risk of cable tie breakage, and improve the reliability of the battery.

[0019] In some embodiments, the outer surface of the first end plate includes a positioning surface perpendicular to the third direction, and the cable tie abuts against the positioning surface in the third direction.

[0020] The positioning surface can provide positioning for the cable tie, so that the cable ties of adjacent battery modules can be staggered in the third direction, saving the space occupied by the cable tie in the first direction. By providing the positioning surface, the battery assembly process can be simplified.

[0021] In some embodiments, the cable tie includes a first edge and a second edge that are opposite to each other along a third direction, wherein the first edge abuts against the positioning surface. A stop protrusion is provided on a side of the first end plate facing away from the battery pack; in the third direction, the stop protrusion is provided on a side of the second edge facing away from the first edge.

[0022] The positioning surface and the stop protrusion can limit the cable tie from both sides, thereby reducing the risk of the cable tie coming off due to battery vibration and other reasons, and improving the reliability of the battery.

[0023] In some embodiments, between two adjacent first end plates along the first direction, at least one positioning surface of one first end plate faces the same direction as at least one positioning surface of the other first end plate, and the minimum spacing between the positioning surfaces facing the same direction in the third direction is D1. The maximum dimension of the cable tie along the third direction is D2, where D1 ≥ D2.

[0024] In the embodiment of the present application, D1 ≥ D2, so as to reserve sufficient space between the positioning surfaces of the two first end plates to accommodate the cable tie, reduce the risk of interference and extrusion of the cable ties on the two first end plates, improve the positioning accuracy of the cable tie, and enhance the reliability of the battery.

[0025] In some embodiments, a battery includes at least one battery module. The battery module includes a first end plate, a second end plate, at least two battery packs, and at least two cable ties. The at least two battery packs are disposed between the first end plate and the second end plate. Each cable tie passes through the first and second end plates and holds multiple battery cells of a battery pack.

[0026] Multiple cable ties clamp multiple battery packs through a first and second end plate, increasing the capacity of a single battery module and simplifying the battery structure. Each cable tie is used to restrain only one battery pack, reducing the force applied to the battery pack during charging, lowering the risk of tie breakage and improving battery reliability.

[0027] In some embodiments, the first end plate includes a plurality of stoppers spaced apart along the first direction, with receiving slots formed between adjacent stoppers. The receiving slots are recessed from the end surface of the first end plate along the third direction. The number of stoppers is the same as the number of battery packs, and they are provided in a one-to-one correspondence. The cable tie passes through the receiving slots and surrounds the stoppers and the battery packs corresponding to the stoppers.

[0028] The cable tie can be inserted into the receiving slot and passed through the side of the retaining portion facing away from the battery pack, thereby restricting the retaining portion from moving away from the battery pack, allowing the cable tie to restrain the multiple battery cells of the battery pack through the first end plate. The provision of the receiving slot also allows for positioning of the cable tie, simplifying the installation process.

[0029] In some embodiments, the two cable ties pass through the same receiving slot and respectively surround the two battery packs. In the same receiving slot, the two cable ties are arranged along the third direction.

[0030] A single receiving slot can simultaneously position two cable ties, simplifying the structure of the first end plate. Arranging the two cable ties along the third direction within the receiving slot allows them to share some space in the first direction, thereby improving battery space utilization in the first direction and boosting the battery's energy density.

[0031] In some embodiments, a side wall of the receiving groove is provided with a step surface; in the same receiving groove, one cable tie abuts against the bottom surface of the receiving groove, and another cable tie abuts against the step surface.

[0032] The step surface and the bottom surface can respectively position the two cable ties to reduce the risk of the two cable ties overlapping in the first direction.

[0033] In some embodiments, the cable tie includes a first edge and a second edge that are opposite each other along a third direction, wherein the first edge is adjacent to the bottom surface of the receiving slot in the third direction. A stop protrusion is provided on a side of each limiting portion facing away from the battery pack; in the third direction, the stop protrusion is provided on a side of the second edge that is facing away from the first edge.

[0034] The stop convex portion can limit the cable tie, thereby reducing the risk of the cable tie falling out of the receiving slot due to battery vibration and the like, thereby improving the reliability of the battery.

[0035] In a second aspect, the present application provides an electrical device, which includes a battery provided by any embodiment of the first aspect, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0037] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0038] FIG2 is a schematic diagram of an explosion of a battery provided in some embodiments of the present application

[0039] FIG3 is a schematic structural diagram of a battery provided in some embodiments of the present application;

[0040] FIG4 is a schematic structural diagram of the battery module shown in FIG3 ;

[0041] FIG5 is a schematic diagram of the battery shown in FIG3 viewed from a second direction;

[0042] FIG6 is an enlarged schematic diagram of the circle frame in FIG3;

[0043] FIG7 is an enlarged schematic diagram of the circle frame in FIG5;

[0044] FIG8 is a schematic structural diagram of a battery module of a battery provided in some embodiments of the present application;

[0045] FIG9 is an exploded schematic diagram of the battery module shown in FIG8 ;

[0046] FIG10 is a schematic diagram of the battery module shown in FIG8 viewed from a second direction;

[0047] FIG11 is a schematic structural diagram of a first end plate of a battery provided in some embodiments of the present application;

[0048] FIG12 is an enlarged schematic diagram of the circle frame in FIG8;

[0049] FIG13 is an enlarged schematic diagram of the circle frame of FIG10;

[0050] FIG14 is an enlarged schematic diagram of the circle frame in FIG11;

[0051] FIG15 is a schematic structural diagram of batteries provided in other embodiments of the present application;

[0052] FIG16 is a schematic diagram of the structure of batteries provided in other embodiments of the present application.

[0053] In the accompanying drawings, the drawings are not necessarily drawn to scale.

[0054] The reference numerals are as follows:

[0055] 1. Vehicle; 2. Battery; 3. Controller; 4. Motor; 5. Housing; 5a. First housing portion; 5b. Second housing portion; 6. Battery module;

[0056] 10. Battery pack; 11. Battery cell; 10a. Side view;

[0057] 20. Cable tie; 21. First edge; 22. Second edge; 20a. First end; 20b. Second end;

[0058] 30. First end plate; 31. Positioning surface; 32. First arc surface; 33. Stopping protrusion; 34. Positioning portion; 35. Accommodating groove; 351. Step surface; 352. Bottom surface; 353. Second arc surface; 354. Third arc surface;

[0059] 40. Second end plate;

[0060] Y, first direction; X, second direction; Z, third direction. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0062] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0063] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0065] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0066] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0067] The term "plurality" used in this application refers to two or more (including two).

[0068] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 85°-90°, they are considered perpendicular; if the angle between two directions is 0°-5°, they are considered parallel.

[0069] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0070] The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., and the embodiments of the present application are not limited to this.

[0071] A battery cell typically consists of an electrode assembly and a housing. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0072] The housing is used to encapsulate the electrode assembly and electrolyte components. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film.

[0073] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0074] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0075] 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 housed in the case.

[0076] 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.

[0077] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0078] In the related art, multiple battery cells in a battery are generally fixed by a frame structure composed of end plates and side plates. The end plates and side plates are heavy and occupy a large space, which will cause the energy density of the battery cells to increase.

[0079] In some embodiments, the battery utilizes cable ties to secure the battery cells. For example, cable ties are wrapped around the perimeter of a row of battery cells to tighten the row. Compared to a frame structure consisting of end plates and side plates, cable ties are smaller and lighter, effectively saving space and weight, and increasing the battery's energy density.

[0080] However, due to the demand for battery capacity, multiple rows of battery cells are usually set up inside the battery. When multiple rows of battery cells are arranged, the space occupied by multiple cable ties in the arrangement direction will overlap, resulting in a large space occupied by the cable ties, which affects the energy density of the battery.

[0081] In view of this, an embodiment of the present application provides a technical solution, which improves space utilization and enhances the energy density of the battery by arranging the cable ties in a staggered manner so that the cable ties share part of the space in the arrangement direction.

[0082] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0083] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0084] As shown in FIG1 , a battery 2 is provided inside the vehicle 1. The battery 2 may be provided at the bottom, head, or tail of the vehicle 1. The battery 2 may be used to power the vehicle 1. For example, the battery 2 may serve as an operating power source for the vehicle 1.

[0085] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of the vehicle 1 during startup, navigation, and driving.

[0086] In some embodiments of the present application, the battery 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0087] FIG2 is a schematic diagram of an explosion of a battery provided in some embodiments of the present application.

[0088] In some embodiments, the battery 2 includes a plurality of battery cells, which may be the smallest unit constituting the battery 2 .

[0089] In some embodiments, the battery 2 includes a housing 5 , and a plurality of battery cells are housed in the housing 5 .

[0090] The housing 5 is used to accommodate battery cells and can have various structures. In some embodiments, the housing 5 can include a first housing portion 5a and a second housing portion 5b. The first housing portion 5a and the second housing portion 5b overlap each other, and the first housing portion 5a and the second housing portion 5b together define a storage space for accommodating battery cells. The second housing portion 5b can be a hollow structure with one end open. The first housing portion 5a is a plate-like structure, and the first housing portion 5a overlaps the open side of the second housing portion 5b to form a housing 5 with a storage space. The first housing portion 5a and the second housing portion 5b can also be hollow structures with one end open. The open side of the first housing portion 5a overlaps the open side of the second housing portion 5b to form a housing 5 with a storage space. Of course, the first housing portion 5a and the second housing portion 5b can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0091] In order to improve the sealing performance after the first box body 5a and the second box body 5b are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 5a and the second box body 5b.

[0092] Assuming that the first box body portion 5a covers the top of the second box body portion 5b, the first box body portion 5a can also be called an upper box cover, and the second box body portion 5b can also be called a lower box body.

[0093] Multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells are connected in both series and parallel.

[0094] In some embodiments, multiple battery cells are first connected in series, in parallel, or in hybrid connection to form a battery module 6 , and the multiple battery modules 6 are then connected in series, in parallel, or in hybrid connection to form a whole, and accommodated in the box 5 .

[0095] Figure 3 is a schematic diagram of the structure of the battery provided in some embodiments of the present application; Figure 4 is a schematic diagram of the structure of the battery module shown in Figure 3; Figure 5 is a schematic diagram of the battery shown in Figure 3 observed from a second direction; Figure 6 is an enlarged schematic diagram of Figure 3 at the circular frame; Figure 7 is an enlarged schematic diagram of Figure 5 at the circular frame.

[0096] Referring to Figures 3 to 7, a battery 2 according to an embodiment of the present application includes a plurality of battery packs 10 and a plurality of cable ties 20. The plurality of battery packs 10 are arranged along a first direction Y, and each battery pack 10 includes a plurality of battery cells 11 stacked along a second direction X, which intersects the first direction Y. At least a portion of the cable ties 20 is disposed on a side surface 10a of at least one battery pack 10 along the first direction Y and is used to restrain the plurality of battery cells 11 of the at least one battery pack 10. At least two cable ties 20 pass between adjacent battery packs 10 and are used to restrain the adjacent battery packs 10. The at least two cable ties 20 passing between adjacent battery packs 10 do not overlap in the first direction Y but overlap in a third direction Z, which is perpendicular to the first direction Y and the second direction X.

[0097] The plurality of battery cells 11 of the battery pack 10 are arranged in a row along the second direction X. The plurality of battery cells 11 of the battery pack 10 may be connected in series, in parallel, or in a mixed connection.

[0098] The battery cell 11 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries.

[0099] The battery cell 11 can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel metal hydride battery cell, a nickel cadmium battery cell, a lead storage battery cell, etc.

[0100] The number of battery cells 11 in two adjacent battery packs 10 may be the same or different.

[0101] The battery cells 11 of two adjacent battery groups 10 can be of the same type, for example, the battery cells 11 of each battery group 10 are all lithium-ion battery cells. The battery cells 11 of two adjacent battery groups 10 can also be of different types, for example, the battery cells 11 of one battery group 10 are lithium-ion battery cells, and the battery cells 11 of the other battery group 10 are sodium-ion battery cells.

[0102] The second direction X forms a certain angle with the first direction Y. For example, the first direction Y is perpendicular to the second direction X.

[0103] The cable tie 20 may be an integrally formed structure or may be formed by splicing together a plurality of separate structures.

[0104] The material of the cable tie 20 can be metal, plastic or other materials. As an example, the cable tie 20 can be made of a metal material with good tensile and deformation resistance, such as steel.

[0105] The plurality of cable ties 20 may be made of the same material or different materials.

[0106] The battery pack 10 has two side surfaces 10 a opposite to each other along a first direction Y. Exemplarily, the battery cells 11 include first and second surfaces opposite to each other along the first direction Y. One side surface 10 a includes the first surfaces of the battery cells 11 of the battery pack 10, and the other side surface 10 a includes the second surfaces of the battery cells 11 of the battery pack 10. Optionally, both the first and second surfaces are perpendicular to the first direction Y.

[0107] The cable tie 20 can directly restrain the multiple battery cells 11 of the battery pack 10. For example, the cable tie 20 can be an annular structure that wraps around the outside of the battery pack 10 to restrain the multiple battery cells 11 of the battery pack 10. The cable tie 20 can also indirectly restrain the multiple battery cells 11 of the battery pack 10 through other components (such as end plates described below).

[0108] At least a portion of the cable tie 20 is disposed on the side surface 10 a and constrains the battery pack 10 in the first direction Y. The cable tie 20 may be in direct contact with the side surface 10 a or may be spaced a certain distance from the side surface 10 a.

[0109] One cable tie 20 may only bind the multiple battery cells 11 of one battery pack 10 , or simultaneously bind the multiple battery cells 11 of two or more battery packs 10 .

[0110] In some examples, the cable tie 20 may be an annular structure. For example, the cable tie 20 may be an integrally formed closed structure with no free ends in the circumferential direction. Alternatively, the cable tie 20 may be a strip-shaped structure before being tied to the battery pack 10. After the cable tie 20 is tied to the outer circumference of the battery pack 10, the two free ends of the cable tie 20 are connected to form an annular structure.

[0111] The cable tie 20 may restrain the battery cells 11 of the battery pack 10 from the outer periphery to reduce the risk of the battery cells 11 of the battery pack 10 being separated.

[0112] One cable tie 20 can be wrapped around one battery pack 10 or multiple battery packs 10 at the same time. In some examples, each cable tie 20 is wrapped around the periphery of one battery pack 10 and is used to restrain the multiple battery cells 11 of the corresponding battery pack 10. In other examples, a portion of the cable tie 20 is wrapped around the periphery of one battery pack 10 and is used to restrain the multiple battery cells 11 of the corresponding battery pack 10, and a portion of the cable tie 20 is wrapped around the periphery of at least two battery packs 10 and is used to restrain the multiple battery cells 11 of the corresponding at least two battery packs 10. In still other examples, each cable tie 20 is wrapped around the periphery of at least two battery packs 10 and is used to restrain the multiple battery cells 11 of the corresponding at least two battery packs 10.

[0113] Each battery pack 10 is surrounded and restrained by a cable tie 20. Each battery pack 10 can be surrounded and restrained by one cable tie 20, or can be surrounded and restrained by two or more cable ties 20.

[0114] The cable tie 20 is passed around both sides of the corresponding battery pack 10 along the first direction Y and passed around both sides of the corresponding battery pack 10 along the second direction X.

[0115] In some alternative examples, the cable tie 20 may also be a strip-shaped structure extending along the second direction X, and its two ends may be connected to the first end plate and the second end plate described below to constrain the battery pack through the first end plate and the second end plate.

[0116] Two or more cable ties 20 are inserted between at least two adjacent battery packs 10. Only one cable tie 20 may be inserted between some adjacent battery packs 10.

[0117] Passing at least two cable ties 20 between adjacent battery packs 10 can at least constrain the two adjacent battery packs 10. For example, when passing the cable ties 20 between adjacent battery packs 10, a portion of the cable ties 20 may constrain one battery pack 10, another portion of the cable ties 20 may constrain another battery pack 10, or all of the cable ties 20 may constrain the two adjacent battery packs 10 together.

[0118] In the embodiment of the present application, the cable tie 20 is small and lightweight. Using the cable tie 20 to restrain the battery packs 10 effectively saves space and weight, thereby increasing the energy density of the battery 2. The cable tie 20 passing between two adjacent battery packs 10 does not overlap in the first direction Y. Therefore, when the two battery packs 10 are arranged along the first direction Y, the cable ties 20 passing between the two adjacent battery packs 10 can avoid each other in the first direction Y. However, the cable ties 20 passing between the two adjacent battery packs 10 overlap in the third direction Z. Therefore, the cable ties 20 passing between the two adjacent battery packs 10 can share a portion of the space in the first direction Y, thereby improving the space utilization of the battery 2 in the first direction Y and increasing the energy density of the battery 2.

[0119] In some embodiments, two or more cable ties 20 are passed between any two adjacent battery packs 10 in the first direction Y. The two or more cable ties 20 passing between adjacent battery packs 10 do not overlap in the first direction Y but overlap in the third direction Z.

[0120] In some embodiments, the cable tie 20 is disposed around the periphery of at least one battery pack 10. The cable tie 20 can restrain the battery cells 11 of the battery pack 10 from the periphery to reduce the risk of the battery cells 11 of the battery pack 10 being separated and improve the reliability of the battery.

[0121] In some embodiments, each cable tie 20 surrounds the outer circumference of a battery pack 10 and is used to restrain the plurality of battery cells 11 of the corresponding battery pack 10 . At least one cable tie 20 surrounds the outer circumference of each battery pack 10 .

[0122] One cable tie 20 is only used to restrain the multiple battery cells 11 of one battery pack 10 .

[0123] The periphery of a battery pack 10 may be surrounded by one cable tie 20 or multiple cable ties 20. In some examples, at least two cable ties 20 are wrapped around the periphery of the same battery pack 10 and jointly restrain the multiple battery cells 11 of the battery pack 10; optionally, at least two cable ties 20 are spaced apart along the third direction Z and wrapped around the periphery of the same battery pack 10.

[0124] The battery cells 11 expand during charging, and the cable tie 20 needs to restrain multiple battery cells 11 and withstand the expansion force of multiple battery cells 11. In the embodiment of the present application, one cable tie 20 is only used to restrain one battery pack 10. This can reduce the force applied to the cable tie 20 during the charging process of the battery 2, reduce the risk of the cable tie 20 breaking, and improve the reliability of the battery 2.

[0125] In some embodiments, the cable ties 20 wrapped around any two adjacent battery packs 10 do not overlap in the first direction Y but overlap in the third direction Z.

[0126] In the embodiment of the present application, multiple cable ties 20 can share a space in the first direction Y, further improving the space utilization of the battery 2 in the first direction Y and increasing the energy density of the battery 2 .

[0127] In some embodiments, the battery 2 further includes a first end plate 30 and a second end plate 40 disposed opposite each other along a second direction X, with at least one battery pack 10 disposed between the first end plate 30 and the second end plate 40. The cable tie 20 is connected to the first end plate 30 and the second end plate 40 so that the first end plate 30 and the second end plate 40 clamp the at least one battery pack 10 from both sides.

[0128] The first end plate 30 and the second end plate 40 are used to clamp and limit the plurality of battery cells 11 of the battery pack 10 .

[0129] The first end plate 30 and the second end plate 40 may only hold one battery pack 10 , or may hold two or more battery packs 10 at the same time.

[0130] The first end plate 30 may be a plate-like structure, or a combination structure with a certain thickness and reinforcement ribs or other structures. The second end plate 40 may be a plate-like structure, or a combination structure with a certain thickness and reinforcement ribs or other structures.

[0131] The first end plate 30 and the second end plate 40 can be made of a variety of materials, such as steel, aluminum, aluminum alloy or others.

[0132] The first end plate 30 and the second end plate 40 may have the same structure or different structures.

[0133] The cable tie 20 is connected to the first end plate 30 and the second end plate 40 and restricts the first end plate 30 and the second end plate 40 from moving in a direction away from each other.

[0134] Compared with the solution of directly restraining the battery pack 10 with the cable tie 20 , the cable tie 20 clamping the battery pack 10 through the first end plate 30 and the second end plate 40 can improve the uniformity of the force applied to the battery cells 11 and reduce local deformation of the battery cells 11 .

[0135] In some embodiments, the battery 2 includes a plurality of battery modules 6 arranged along a first direction Y. Each battery module 6 includes a first end plate 30, a second end plate 40, a battery pack 10, and at least one cable tie 20. The battery pack 10 is arranged between the first end plate 30 and the second end plate 40. The cable tie 20 surrounds the entire structure consisting of the first end plate 30, the second end plate 40, and the battery pack 10. The cable ties 20 of two adjacent battery modules 6 do not overlap in the first direction Y but overlap in the third direction Z.

[0136] The battery module 6 may include only one cable tie 20 or may include multiple cable ties 20 at the same time.

[0137] In the embodiment of the present application, each battery pack 10 is correspondingly provided with a first end plate 30, a second end plate 40 and a cable tie 20, which can improve the overall structural strength, enhance the stability of the multiple battery cells 11 of each battery pack 10, reduce the force on the cable tie 20 during the charging process of the battery cell 11, reduce the risk of the cable tie 20 breaking, and improve the reliability of the battery 2.

[0138] In some embodiments, the battery module 6 includes two cable ties 20 , which are spaced apart along the third direction Z. Optionally, the two cable ties 20 are disposed near both ends of the first end plate 30 along the third direction Z.

[0139] In some embodiments, the cable ties 20 of any two battery modules 6 adjacent in the first direction Y do not overlap in the first direction Y but overlap in the third direction Z.

[0140] In some embodiments, an outer surface of the first end plate 30 includes a positioning surface 31 perpendicular to the third direction Z, and the cable tie 20 abuts against the positioning surface 31 in the third direction Z.

[0141] The first end plate 30 may have one or more positioning surfaces 31 that abut against the same cable tie 20 .

[0142] The positioning surface 31 can provide positioning for the cable tie 20, so that the cable ties 20 of adjacent battery modules 6 can be staggered in the third direction Z, saving the space occupied by the cable tie 20 in the first direction Y. By providing the positioning surface 31, the assembly process of the battery 2 can be simplified.

[0143] In some embodiments, a first arc surface 32 is formed at the end of the first end plate 30 along the first direction Y. The first arc surface 32 is located on the side of the positioning surface 31 facing the cable tie 20. The cable tie 20 is attached to the first arc surface 32 and bent into an arc shape.

[0144] By providing the first arc surface 32 , a smooth transition of the cable tie 20 at the bend can be achieved, thereby reducing stress concentration of the cable tie 20 and lowering the risk of breakage of the cable tie 20 .

[0145] In some embodiments, the positioning surface 31 and the first arc surface 32 may be formed by providing rounded corners at the end of the first end plate 30 .

[0146] In some embodiments, the first end plate 30 is provided with four positioning surfaces 31, two positioning surfaces 31 being located at both ends of the first end plate 30 along the first direction Y and used to position one cable tie 20, and the other two positioning surfaces 31 being located at both ends of the first end plate 30 along the first direction Y and used to position another cable tie 20. The orientation of the two positioning surfaces 31 is opposite to that of the other two positioning surfaces 31, for example, the first two positioning surfaces 31 face upward, while the other two positioning surfaces 31 face downward.

[0147] In some embodiments, the cable tie 20 includes a first edge 21 and a second edge 22 that are opposite each other along a third direction Z, with the first edge 21 abutting against a positioning surface 31. A stopper protrusion 33 is provided on a side of the first end plate 30 facing away from the battery pack 10. In the third direction Z, the stopper protrusion 33 is provided on a side of the second edge 22 facing away from the first edge 21.

[0148] The first end plate 30 may include one or more stopping protrusions 33 .

[0149] The positioning surface 31 and the stop protrusion 33 can limit the cable tie 20 from both sides, thereby reducing the risk of the cable tie 20 falling out due to vibration of the battery 2 and other reasons, and improving the reliability of the battery 2.

[0150] In some embodiments, the number and positions of the stopping protrusions 33 can be set according to the number and positions of the cable ties 20 .

[0151] Exemplarily, the battery module 6 includes two cable ties 20 , and each cable tie 20 is correspondingly provided with at least one stopping protrusion 33 .

[0152] In some embodiments, there are four stopping protrusions 33 , and the four stopping protrusions 33 are respectively disposed close to the four positioning surfaces 31 .

[0153] The two stopping protrusions 33 and the two positioning surfaces 31 are used to limit the position of one cable tie 20 , and the other two stopping protrusions 33 and the other two positioning surfaces 31 are used to limit the position of the other cable tie 20 .

[0154] In some embodiments, between two adjacent first end plates 30 along the first direction Y, at least one positioning surface 31 of one first end plate 30 and at least one positioning surface 31 of the other first end plate 30 face the same direction, and the minimum spacing between the positioning surfaces 31 facing the same direction in the third direction Z is D1. The maximum dimension of the cable tie 20 along the third direction Z is D2, where D1 ≥ D2.

[0155] If D1 < D2 , when the two cable ties 20 respectively abut against the positioning surfaces 31 of the two first end plates 30 , the two cable ties 20 may be squeezed and interfered with each other in the third direction Z, causing one cable tie 20 to deviate from the positioning surface 31 .

[0156] In the embodiment of the present application, D1 ≥ D2, so as to reserve sufficient space between the positioning surfaces 31 of the two first end plates 30 to accommodate the cable tie 20, reduce the risk of interference and extrusion of the cable ties 20 on the two first end plates 30, improve the positioning accuracy of the cable tie 20, and enhance the reliability of the battery 2.

[0157] In some embodiments, D1 > D2. In the embodiment of the present application, the cable ties 20 of the two battery modules 6 may be spaced apart along the third direction Z to reduce the risk of interference between the cable ties 20 due to assembly errors.

[0158] In some embodiments, among any two adjacent first end plates 30, at least one positioning surface 31 of one first end plate 30 and at least one positioning surface 31 of the other first end plate 30 face the same direction, and the minimum spacing between the positioning surfaces 31 facing the same direction in the third direction Z is D1. The maximum dimension of the cable tie 20 along the third direction Z is D2, where D1 ≥ D2.

[0159] In some embodiments, the second end plate 40 also has a positioning surface, a stop protrusion, and other structures. For ease of distinction, the positioning surface 31 of the first end plate 30 may be referred to as the first positioning surface, and the stop protrusion 33 of the first end plate 30 may be referred to as the first stop protrusion; the positioning surface of the second end plate 40 may be referred to as the second positioning surface, and the stop protrusion of the second end plate may be referred to as the second stop protrusion.

[0160] Exemplarily, the at least one first positioning surface and the at least one second positioning surface are coplanar and are used to position the same cable tie 20. The second stopping protrusion is provided on a side of the second end plate facing away from the battery pack and is used to stop the cable tie.

[0161] Figure 8 is a structural schematic diagram of a battery module of a battery provided in some embodiments of the present application; Figure 9 is an exploded schematic diagram of the battery module shown in Figure 8; Figure 10 is a schematic diagram of the battery module shown in Figure 8 observed from a second direction; Figure 11 is a structural schematic diagram of a first end plate of a battery provided in some embodiments of the present application; Figure 12 is an enlarged schematic diagram of Figure 8 at the circular frame; Figure 13 is an enlarged schematic diagram of Figure 10 at the circular frame; and Figure 14 is an enlarged schematic diagram of Figure 11 at the circular frame.

[0162] 8 to 14 , in some embodiments, the battery 2 includes at least one battery module 6. The battery module 6 includes a first end plate 30, a second end plate 40, at least two battery packs 10, and at least two cable ties 20. The at least two battery packs 10 are disposed between the first end plate 30 and the second end plate 40. Each cable tie 20 passes through the first end plate 30 and the second end plate 40, and clamps multiple battery cells 11 of a battery pack 10.

[0163] The battery 2 may include one battery module 6 or more than two battery modules 6 .

[0164] The battery module 6 may include two battery packs 10 , or may include three or more battery packs 10 .

[0165] In the battery module 6 , each cable tie 20 surrounds the outer circumference of a battery pack 10 and restrains the plurality of battery cells 11 of the corresponding battery pack 10 through the first end plate 30 and the second end plate 40 .

[0166] In the embodiment of the present application, multiple cable ties 20 clamp multiple battery packs 10 via a first end plate 30 and a second end plate 40, thereby increasing the capacity of a single battery module 6 and simplifying the structure of the battery 2. Each cable tie 20 is used to restrain only one battery pack 10, which can reduce the force applied to the cable tie 20 during the charging process of the battery cell 11, lowering the risk of the cable tie 20 breaking and improving the reliability of the battery 2.

[0167] In some embodiments, the first end plate 30 includes a plurality of stoppers 34 spaced apart along the first direction Y. Accommodation slots 35 are formed between adjacent stoppers 34. Accommodation slots 35 are recessed from the end surface of the first end plate 30 along the third direction Z. The number of stoppers 34 is the same as the number of battery packs 10, and they are provided in a one-to-one correspondence. The cable tie 20 passes through the accommodation slots 35 and surrounds the stoppers 34 and the battery pack 10 corresponding to the stoppers 34.

[0168] In the embodiment of the present application, multiple limiting portions 34 may be provided only at one end of the first end plate 30 along the third direction Z, or multiple limiting portions 34 may be provided at both ends of the first end plate 30 along the third direction Z.

[0169] The number of the accommodating grooves 35 can be set according to the number of the limiting portions 34 .

[0170] The receiving groove 35 passes through the first end plate 30 along the second direction X.

[0171] In the embodiment of the present application, the cable tie 20 can be inserted into the receiving slot 35 and pass through the side of the limiting portion 34 facing away from the battery pack 10, thereby restricting the movement of the limiting portion 34 away from the battery pack 10, allowing the cable tie 20 to restrain the multiple battery cells 11 of the battery pack 10 through the first end plate 30. The provision of the receiving slot 35 also allows for positioning of the cable tie 20, simplifying the installation process of the cable tie 20.

[0172] In some embodiments, a plurality of limiting portions 34 are provided at both ends of the first end plate 30 along the third direction Z. An accommodating groove 35 is provided between two adjacent limiting portions 34 in the first direction Y.

[0173] In some embodiments, the two cable ties 20 pass through the same receiving slot 35 and respectively surround the two battery packs 10. In the same receiving slot 35, the two cable ties 20 are arranged along the third direction Z.

[0174] In the embodiment of the present application, two cable ties 20 may pass through the same receiving slot 35, or more than three cable ties 20 may pass through the same receiving slot 35. For example, three cable ties 20 may pass through the same receiving slot 35, two of which may wrap around the same battery pack 10, and the remaining one may wrap around another battery pack 10.

[0175] A single receiving slot 35 can simultaneously position two cable ties 20, thereby simplifying the structure of the first end plate 30. The two cable ties 20 are arranged in the receiving slot 35 along the third direction Z, allowing the two cable ties 20 to share some space in the first direction Y. This improves the space utilization of the battery 2 in the first direction Y and increases the energy density of the battery 2.

[0176] In some embodiments, the sidewall of the receiving groove 35 is provided with a step surface 351. In the same receiving groove 35, one cable tie 20 abuts against the bottom surface 352 of the receiving groove 35, and another cable tie 20 abuts against the step surface 351.

[0177] In the third direction Z, the stepped surface 351 is spaced a certain distance from the bottom surface 352 of the receiving groove 35 in the third direction Z. Exemplarily, the stepped surface 351 may be formed on the limiting portion 34 .

[0178] In the embodiment of the present application, the step surface 351 and the bottom surface 352 can respectively position the two cable ties 20 to reduce the risk of the two cable ties 20 overlapping in the first direction Y.

[0179] In some embodiments, within the same receiving slot 35 , two cable ties 20 are spaced apart along the third direction Z to reduce the risk of interference between the cable ties 20 due to assembly errors.

[0180] In some embodiments, in the third direction Z, a minimum distance D3 between the step surface 351 and the bottom surface 352 is greater than a maximum dimension D2 of the cable tie 20 along the third direction Z.

[0181] In some embodiments, the step surface 351 is perpendicular to the third direction Z.

[0182] In some embodiments, the two side walls of the accommodating groove 35 respectively form a second arc surface 353 and a third arc surface 354, the second arc surface 353 is connected to the bottom surface 352, is located on the side of the bottom surface 352 facing the cable tie 20 and is formed on a limiting portion 34, and the third arc surface 354 is connected to the step surface 351, is located on the side of the step surface 351 away from the bottom surface 352 and is formed on another limiting portion 34.

[0183] The cable tie 20 abutting the bottom surface 352 is attached to the second arc surface 353 and bent into an arc shape. The cable tie 20 abutting the step surface 351 is attached to the third arc surface 354 and bent into an arc shape.

[0184] In some embodiments, the cable tie 20 includes a first edge 21 and a second edge 22 that are opposite each other along a third direction Z. The first edge 21 is adjacent to the bottom surface 352 of the receiving slot 35 in the third direction Z. A stop protrusion 33 is provided on the side of each stop portion 34 facing away from the battery pack 10. In the third direction Z, the stop protrusion 33 is provided on the side of the second edge 22 facing away from the first edge 21.

[0185] The number of the stopping protrusion 33 of each limiting portion 34 may be one or more.

[0186] The stop protrusion 33 can limit the cable tie 20 , thereby reducing the risk of the cable tie 20 falling out of the receiving groove 35 due to vibration of the battery 2 and other reasons, thereby improving the reliability of the battery 2 .

[0187] In some embodiments, the number and positions of the stopping protrusions 33 can be set according to the number and positions of the cable ties 20 .

[0188] Each limiting portion 34 is provided with two stopping protrusions 33 . The two stopping protrusions 33 are arranged along the first direction Y and are respectively arranged close to two ends of the limiting portion 34 along the first direction Y.

[0189] In some embodiments, the second end plate 40 is also provided with a stopper, a receiving groove, a stopper protrusion, and other structures. For ease of distinction, the stopper of the first end plate may be referred to as the first stopper, and the receiving groove of the first end plate may be referred to as the first receiving groove; the stopper of the second end plate may be referred to as the second stopper, and the receiving groove of the second end plate may be referred to as the second receiving groove.

[0190] Illustratively, the first limiting portion and the second limiting portion are arranged opposite to each other along the second direction, and the first accommodating groove and the second accommodating groove are arranged opposite to each other along the second direction.

[0191] Exemplarily, the number of the first limiting portions is the same as the number of the second limiting portions, and the number of the first accommodating grooves is the same as the number of the second accommodating grooves.

[0192] In some embodiments, the second receiving groove is also provided with structures such as a step surface.

[0193] FIG15 is a schematic diagram of the structure of batteries provided in other embodiments of the present application.

[0194] As shown in FIG. 15 , in some embodiments, at least one cable tie 20 is wrapped around the periphery of two or more battery packs 10 .

[0195] On the premise that the strength of the cable tie 20 meets the requirements, one cable tie 20 can be used to simultaneously bind more than two battery packs 10 , which can save materials, reduce the space and weight occupied by the cable tie 20 , and improve the energy density of the battery.

[0196] In some embodiments, the battery modules are divided into two categories: first and second battery modules. In the first battery module, a cable tie 20 is wrapped around the periphery of one or more battery packs 10; in the second battery module, a cable tie 20 is wrapped around the periphery of two or more battery packs 10. The first and second battery modules can be arranged along a first direction Y.

[0197] FIG16 is a schematic diagram of the structure of batteries provided in other embodiments of the present application.

[0198] As shown in FIG. 16 , in some embodiments, the cable tie 20 includes a first end portion 20 a and a second end portion 20 b opposite to each other along the second direction X. The first end portion 20 a and the second end portion 20 b are connected to the first end plate 30 and the second end plate 40 , respectively.

[0199] The first end portion 20 a may be fixed to the first end plate 30 by welding, clamping, fastening or other means, and the second end portion 20 b may be fixed to the first end plate 30 by welding, clamping, fastening or other means.

[0200] The embodiment of the present application can save the space and weight occupied by the cable tie 20 and improve the energy density of the battery.

[0201] In some embodiments, the battery 2 includes a plurality of battery modules arranged along a first direction Y. Each battery module includes a first end plate 30, a second end plate 40, a battery pack 10, and a plurality of cable ties 20. The battery pack 10 is arranged between the first end plate 30 and the second end plate 40. Cable ties 20 are provided on both sides of the battery pack 10 along the first direction Y.

[0202] According to some embodiments of the present application, the present application further provides an electrical device comprising a battery according to any of the above embodiments, the battery being used to provide electrical energy to the electrical device. The electrical device may be any of the aforementioned devices or systems using the battery.

[0203] 3 to 7 , an embodiment of the present application provides a battery 2 including a plurality of battery modules 6 arranged along a first direction Y. Each battery module 6 includes a first end plate 30, a second end plate 40, a battery pack 10, and two cable ties 20. The battery pack 10 is disposed between the first end plate 30 and the second end plate 40 and includes a plurality of battery cells 11 stacked along a second direction X. The cable ties 20 surround the first end plate 30, the second end plate 40, and the battery pack 10, and constrain the plurality of battery cells 11 of the battery pack 10 via the first end plate 30 and the second end plate 40. The two cable ties 20 are spaced apart along a third direction Z. The first direction Y, the second direction X, and the third direction Z are perpendicular to each other.

[0204] In any two adjacent battery modules 6 , the cable ties 20 of the two battery modules 6 do not overlap in the first direction Y but overlap in the third direction Z.

[0205] The first end plate 30 is provided with four positioning surfaces 31. Two positioning surfaces 31 are located at both ends of the first end plate 30 along the first direction Y and are used to position one cable tie 20. The other two positioning surfaces 31 are located at both ends of the first end plate 30 along the first direction Y and are used to position another cable tie 20. The orientation of these two positioning surfaces 31 is opposite to that of the other two positioning surfaces 31.

[0206] The cable tie 20 includes a first edge 21 and a second edge 22 that are opposed to each other along a third direction Z. The first edge 21 abuts against a positioning surface 31. A stopper protrusion 33 is provided on the side of the first end plate 30 facing away from the battery pack 10. In the third direction Z, the stopper protrusion 33 is provided on the side of the second edge 22 facing away from the first edge 21.

[0207] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery comprising: A plurality of battery packs arranged along a first direction, each of the battery packs comprising a plurality of battery cells stacked along a second direction, the second direction intersecting the first direction; a plurality of cable ties, at least a portion of which is disposed on a side surface of at least one of the battery packs along the first direction and is used to constrain the plurality of battery cells of at least one of the battery packs, At least two of the cable ties pass through adjacent battery packs and are used to constrain adjacent battery packs, and the at least two cable ties do not overlap in the first direction but overlap in a third direction, and the third direction is perpendicular to the first direction and the second direction.

2. The battery according to claim 1, wherein The cable tie is disposed around the outer circumference of at least one battery pack.

3. The battery according to claim 2, wherein The cable tie surrounds the outer circumference of one of the battery packs and is used to constrain the plurality of battery cells of the corresponding battery pack. At least one cable tie surrounds the outer circumference of each of the battery packs.

4. The battery according to claim 2, wherein At least one of the cable ties is wrapped around the outer circumferences of two or more of the battery packs.

5. The battery according to claim 1, further comprising a first end plate and a second end plate disposed opposite to each other along the second direction, at least one of the battery packs being disposed between the first end plate and the second end plate; The cable tie is connected to the first end plate and the second end plate so that the first end plate and the second end plate clamp at least one of the battery packs from both sides.

6. The battery according to claim 5, wherein The cable tie includes a first end and a second end opposite to each other along the second direction, wherein the first end and the second end are connected to the first end plate and the second end plate respectively.

7. The battery according to claim 5, comprising a plurality of battery modules arranged along the first direction; Each of the battery modules includes a first end plate, a second end plate, a battery pack, and at least one tie, wherein the battery pack is disposed between the first end plate and the second end plate, and the tie surrounds the first end plate, the second end plate, and the battery pack as a whole; The cable ties of two adjacent battery modules do not overlap in the first direction but overlap in the third direction.

8. The battery according to claim 7, wherein The outer surface of the first end plate includes a positioning surface perpendicular to the third direction, and the cable tie abuts against the positioning surface in the third direction.

9. The battery according to claim 8, wherein The cable tie comprises a first edge and a second edge opposite to each other along the third direction, wherein the first edge abuts against the positioning surface; A stopper protrusion is provided on a side of the first end plate away from the battery pack; in the third direction, the stopper protrusion is provided on a side of the second edge away from the first edge.

10. The battery according to claim 8 or 9, wherein Of the two first end plates adjacent to each other along the first direction, at least one of the first end plates The positioning surface is oriented in the same direction as at least one positioning surface of another first end plate, and the minimum spacing between the positioning surfaces oriented in the same direction in the third direction is D1; The maximum dimension of the cable tie along the third direction is D2, and D1≥D2.

11. The battery according to claim 5, comprising at least one battery module; The battery module includes a first end plate, a second end plate, at least two battery packs, and at least two cable ties, at least two battery packs are arranged between the first end plate and the second end plate, and each cable tie bypasses the outer side of the first end plate and the outer side of the second end plate and clamps the multiple battery cells of one battery pack through the first end plate and the second end plate.

12. The battery according to claim 11, wherein The first end plate comprises a plurality of limiting portions spaced apart along the first direction, and an accommodating groove is formed between adjacent limiting portions, and the accommodating groove is recessed from an end surface of the first end plate along the third direction; The limiting parts are equal in number to the battery packs and are arranged in one-to-one correspondence; the cable tie passes through the accommodating groove and surrounds the limiting parts and the battery packs corresponding to the limiting parts.

13. The battery according to claim 12, wherein: The two cable ties pass through the same receiving slot, and the two cable ties respectively surround the two battery packs; In the same accommodating groove, the two cable ties are arranged along the third direction.

14. The battery according to claim 13, wherein The side wall of the receiving groove is provided with a step surface; in the same receiving groove, one of the cable ties abuts against the bottom surface of the receiving groove, and another of the cable ties abuts against the step surface.

15. The battery according to any one of claims 12 to 14, wherein: The cable tie comprises a first edge and a second edge opposite to each other along the third direction, wherein the first edge is close to the bottom surface of the receiving groove in the third direction; A stop convex portion is provided on a side of each of the limiting portions away from the battery pack; in the third direction, the stop convex portion is arranged on a side of the second edge away from the first edge.

16. An electrical device comprising the battery according to any one of claims 1 to 15, wherein the battery is used for providing electrical energy.

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