Battery device, electric device and energy storage device

Abstract

This application relates to the field of battery technology, providing a battery device, electrical equipment, and energy storage device. In this battery device, the battery module includes a group of battery cells and a constraint assembly. The constraint assembly consists of a clamping member and a locking mechanism. The clamping member can surround the outer periphery of the battery cell group. The locking mechanism includes a body and a locking unit. The body is fixed to a first connecting portion of the clamping member, and the locking unit is detachably connected to a second connecting portion of the clamping member. The second connecting portion has multiple locking positions along its length. These locking positions can respectively cooperate with the locking unit and be locked or unlocked by the locking unit. The tightness of the clamping member can be adjusted, thereby changing the size of the ring formed around the battery cell group, adapting to the assembly of battery modules of different specifications, and broadening its applicability. Simultaneously, the clamping preload can be adjusted as needed to ensure uniform and stable constraint of the battery cell group, guaranteeing the regularity and stability of the module assembly.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, electrical equipment, and energy storage device. Background Technology

[0002] With the increasingly widespread application of new energy batteries in daily life and industry, various electrical devices, represented by new energy vehicles, have become popular, and the application of batteries in the field of energy storage is also constantly expanding.

[0003] Traditional battery modules are generally secured using steel cable ties, which are often custom-designed and have poor universal compatibility. Different steel cable ties need to be developed separately for battery modules of different sizes, increasing the costs of component design, production, and warehousing management, and hindering rapid equipment iteration and expansion into multiple scenarios.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above problems, embodiments of this application provide a battery device, an electrical device, and an energy storage device, which aim to improve the adaptability of the cable tie structure in the battery module.

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery module, which includes a battery cell group and a constraint component; the battery cell group includes a plurality of stacked battery cells; the constraint component includes a locking mechanism and a fastening member; the locking mechanism includes a body and a locking unit disposed on the body; the fastening member surrounds the outer periphery of the battery cell group, and the fastening member has a first connecting portion and a second connecting portion respectively disposed at both ends in its length direction, the first connecting portion being fixedly connected to the body, and the second connecting portion being engaged with the locking unit; wherein, the second connecting portion has a plurality of locking positions disposed in its length direction, and the plurality of locking positions can respectively engage with the locking unit and be locked or unlocked by the locking unit, so that the fastening member can adjustably fix the plurality of battery cells.

[0007] In the above technical solution, by combining a locking mechanism with a fastening component in the constraint assembly, and relying on the detachable connection structure between the locking unit of the locking mechanism and the second connecting part of the fastening component, the locking and unlocking adjustment of different positions of the fastening component can be realized, allowing the fastening component to maintain an adjustable tightness. Based on the tightness adjustment characteristics of the fastening component, the actual size of the ring formed by the fastening component around the battery cell group can be flexibly changed, thereby adapting to the assembly and use of battery modules of different specifications and sizes, effectively broadening the scope of application of the structure and improving the overall adaptability. At the same time, with the help of the adjustable fastening structure of the fastening component, the pre-tightening force applied to the outside of the battery cell group can be adjusted as needed, so that the battery cell group can obtain a uniform and stable binding and pressing effect after stacking and assembling, ensuring the regularity and stability of the overall assembly structure of the battery module.

[0008] In some embodiments, the main body is provided with a mounting hole, and a conical surface is provided inside the mounting hole; the locking unit includes a locking member, which is movably disposed inside the mounting hole; wherein, when the locking member is configured to press against the mounting hole, the locking member can simultaneously abut against the conical surface and the second connecting portion to lock the second connecting portion; when the locking member is configured to move in a direction away from the conical surface or the second connecting portion, the second connecting portion can be unlocked.

[0009] In the above technical solution, a conical surface is provided within the mounting hole of the main body, and the locking element of the locking unit is movably assembled inside the mounting hole. The locking and unlocking functions of the second connecting part are achieved by switching the displacement state of the locking element. When the locking element is pressed into the mounting hole, it simultaneously forms an abutment with the conical surface and the second connecting part. Utilizing the structural guidance and abutment support of the conical surface, the abutment force of the locking element is effectively applied to the second connecting part, keeping it in a fixed state and achieving stable locking. When the locking element moves away from the conical surface or the second connecting part, the abutment relationship between the locking element and either is released, and the constraint state of the second connecting part is released, allowing for free insertion and adjustment. This movable structure, combined with the linkage design of the conical surface, allows for flexible switching between locking and unlocking conditions, improving the flexibility and adaptability of the tightening structure adjustment. Simultaneously, the bidirectional abutment mechanism enhances the structural tightness in the locking state, ensuring the overall stability of the locking structure.

[0010] In some embodiments, the locking unit further includes a carrier, which has a through hole through which the second connecting part passes, and a limiting hole is formed on the wall of the hole; wherein, the locking member is movably disposed in the limiting hole, the part of the locking member placed in the through hole can contact the second connecting part, and the part of the locking member placed outside the through hole can contact the conical surface.

[0011] In the above technical solution, the carrier has a through hole for the second connecting part to pass through and a limiting hole for assembling the lock. The locking part is positioned by the limiting hole, with the lock divided into sections inside and outside the through hole. The inner section of the through hole can contact the second connecting part, while the outer section can engage with the conical surface. As the carrier moves relative to the conical surface, the conical surface can drive the lock to move along the limiting hole through the exposed section of the lock, thereby changing the contact pressure between the lock and the second connecting part. This segmented contact layout achieves step-by-step force transmission, helping to refine the linkage logic of the locking action. It allows the displacement force of the conical surface to be smoothly transmitted to the second connecting part via the lock, optimizing the smoothness of the locking and unlocking process and improving the fit between the components.

[0012] In some embodiments, the limiting hole is configured to allow the locking member to move radially along the through hole and to prevent the locking member from completely disengaging from the limiting hole.

[0013] In the above technical solution, the limiting hole can limit the movement of the locking component, guiding its radial displacement along the through hole, providing space for the locking component to engage with the conical surface and the second connecting part, thus facilitating the locking of the second connecting part. Simultaneously, the limiting hole can constrain the stroke of the locking component, control its range of motion, keep the locking component in the corresponding assembly position of the lock cylinder, maintain the integrated assembly state of the two, reduce misalignment of the locking component, ensure unobstructed access to the lock cylinder through hole, facilitate the insertion and installation of the second connecting part, optimize the assembly process, and improve the structural integrity and operational stability of the locking unit.

[0014] In some embodiments, the locking element is a sphere; the limiting hole is a variable diameter hole that is larger in the middle and smaller at both ends along the radial direction of the through hole; wherein, the maximum diameter of the limiting hole is greater than the diameter of the sphere, and the minimum diameter of the limiting hole is less than the diameter of the sphere.

[0015] In the above technical solution, the locking component is set as a sphere, and the limiting hole is set as a variable-diameter hole with a larger diameter in the middle and smaller diameter at both ends. The maximum diameter of the limiting hole is larger than the outer diameter of the sphere, and the minimum diameter is smaller than the outer diameter of the sphere. The variable-diameter hole can reserve radial movement space for the spherical locking component, which can flexibly move to fit the conical surface and the second connecting part, so as to achieve smooth locking linkage. At the same time, the small diameter at both ends can limit the sphere, keep it in the assembled state, maintain the integrity of the lock cylinder structure and the unobstructed through hole, facilitate the insertion of the second connecting part, and improve the structural fit accuracy and usage stability.

[0016] In some embodiments, there are multiple limiting holes, and the multiple limiting holes are distributed circumferentially along the through hole; wherein each limiting hole is configured with a locking element.

[0017] In the above technical solution, multiple limiting holes are arranged circumferentially along the through hole, each corresponding to a locking element, forming multiple sets of mating structures. The circumferential distribution of multiple locking elements allows for simultaneous abutment from multiple directions around the outer periphery of the second connecting part. Combined with the conical surface and elastic element, the locking force can be transmitted relatively evenly, improving the stability of locking the second connecting part and making the tightening element more secure. Simultaneously, the coordinated action of multiple locking elements enhances the tightness of the fit between the lock cylinder and the second connecting part, optimizes the linkage effect, makes locking and unlocking smoother, and improves the overall performance and adaptability of the locking unit.

[0018] In some embodiments, the carrier and the locking element are assembled together to form a lock cylinder; the locking unit also includes an elastic element, which provides elastic force and presses the lock cylinder into the mounting hole, so that the locking element can simultaneously abut against the conical surface and the second connecting part to lock the second connecting part.

[0019] In the above technical solution, the elastic element outputs elastic force to press the lock cylinder into the mounting hole, so that the lock abuts against the conical surface and the second connecting part, thereby locking the second connecting part to maintain the fastening element.

[0020] In some embodiments, the locking unit further includes an unlocking member for overcoming the elastic force of the elastic member and driving the lock cylinder to move, thereby unlocking the second connection portion.

[0021] In the above technical solution, the unlocking component can overcome the elastic force that drives the lock cylinder to move, unlock, and complete the loosening and unloading adjustment of the fastening component, which has the characteristics of smooth operation and efficient adjustment.

[0022] In some embodiments, the mounting hole penetrates the body along a first direction; the two ends of the lock cylinder in the first direction are a first end and a second end, respectively, and the direction from the first end to the second end is consistent with the direction from the small diameter end of the conical surface to its large diameter end; wherein, the unlocking element is disposed at the first end, and the elastic element is disposed at the second end.

[0023] In the above technical solution, the mounting hole penetrates the body along the first direction, and the positions of the two ends of the lock cylinder, the conical surface, the unlocking component, and the elastic component are rationally arranged so that the direction from the first end of the lock cylinder to the second end is consistent with the direction from the small diameter end of the conical surface to the large diameter end. The unlocking component is located at the first end of the lock cylinder, and the elastic component is located at the second end. The elastic component can push the lock cylinder towards the small diameter end of the conical surface to achieve reliable locking of the second connection part; the unlocking component can reverse the elastic force to drive the lock cylinder to move, completing the unlocking. This layout makes the force transmission smooth, the operation convenient, and improves the coordination and structural stability of the various components of the locking unit.

[0024] In some embodiments, the end of the unlocking member that is away from the lock cylinder in a first direction protrudes from the body.

[0025] In the above technical solution, the end of the unlocking component away from the lock cylinder along the first direction protrudes from the outside of the body, forming an easily operable part on the outside of the body, making it convenient for the operator to apply force directly. This layout simplifies the unlocking force application process, reduces the difficulty of operation, makes the lock cylinder displacement drive smoother, improves the convenience of locking and unlocking the fastening component, and optimizes the overall structural operability and user experience.

[0026] In some embodiments, the locking unit further includes a blocking member connected to the body and disposed at the end of the elastic member away from the lock cylinder along a first direction, so as to restrict the elastic member and the lock cylinder within the mounting hole.

[0027] In the above technical solution, a blocking component connected to the main body is added to the end of the elastic element away from the lock cylinder, which can constrain the elastic element and the lock cylinder within the mounting hole. During assembly, the lock cylinder and elastic element can be installed sequentially, and then positioned using the blocking component, standardizing the assembly process and improving assembly efficiency and convenience. At the same time, the blocking component can support the elastic element to maintain a regular force, maintain its uniform pushing action on the lock cylinder, limit the displacement of the lock cylinder and elastic element, enhance the fitting accuracy of components, and improve the overall structural integrity and operational stability.

[0028] In some embodiments, the second connecting portion is connected to the locking unit so that the fastening member can be formed into a ring; wherein, when the second connecting portion passes through the lock cylinder in a direction from the first end to the second end, the ring tightens and shrinks; and when the second connecting portion passes through the lock cylinder in a direction from the second end to the first end, the ring expands and enlarges.

[0029] In the above technical solution, the second connecting part cooperates with the locking unit to stably enclose the fastening member into a closed ring. The ring size can be flexibly adjusted by the interlacing movement of the second connecting part in different directions. When the second connecting part inserts from the first end to the second end of the lock cylinder, the fastening member contracts, the ring tightens, and its inner diameter decreases; when it inserts out in the opposite direction, the fastening member relaxes, the ring expands, and its size increases. This bidirectional interlacing adjustment method allows for flexible adjustment of the fastening member's enclosure range and restraint force, adapting to the assembly requirements of battery cell packs of different sizes, precisely controlling the pre-tightening degree, and improving the device's adaptability and assembly adjustment flexibility.

[0030] In some embodiments, the fastening member is a flexible member, and the ultimate breaking tensile force of the fastening member is 5kN to 30kN.

[0031] In the above technical solution, the clamping component is designed as a flexible component, with its ultimate breaking tensile force limited to 5kN to 30kN, balancing flexibility and structural strength. Its flexibility allows it to conform to the outer contour of the battery cell assembly, facilitating flexible deformation adjustment according to the ring size and improving the ease of clamping operations. The specific range of ultimate breaking tensile force provides the clamping component with sufficient load-bearing capacity, enabling stable application of pre-tightening force and resistance to restraint stress, maintaining structural integrity, adapting to the stress requirements of battery module assembly, and improving the reliability and service life of the restraint components.

[0032] In some embodiments, the fastening element is a component made of flexible braided wire.

[0033] In the above technical solution, the clamping component is formed by flexible wire braiding. Compared with the single-layer thickened structure, the braided component has better comprehensive mechanical properties and deformation adaptability. While maintaining good flexibility, it has higher tensile strength and fatigue resistance, and can continuously withstand the expansion force of the battery cell pack to achieve stable constraint. Its own flexibility can also buffer vibration and impact, weaken the influence of external forces, buffer stress transmission, improve the stability and reliability of battery module assembly, and extend the service life of the constraint component.

[0034] In some embodiments, the fastening member is a component made of multiple layers; wherein the multiple layers are stacked along the thickness direction of any one layer; or, any two adjacent layers in the multiple layers are nested inside and outside each other.

[0035] In the above technical solution, the fastening component is designed as a multi-layered composite structure, with each layer stacked in the thickness direction or nested internally and externally, unlike traditional single-layer thickening molding. This structure can replace the integral bending of high-strength thick plates, mitigating deformation defects and stress concentration during molding; through multi-layer synergistic load-bearing, it can improve the tensile strength and structural stiffness of the fastening component, evenly distribute the force, and optimize stress distribution. Simultaneously, its combination form allows for flexible adjustment of mechanical properties, ensuring locking effect while optimizing processing technology, improving structural consistency and long-term stability.

[0036] In some embodiments, the multiple layer structures include a combination of rigid and flexible elements.

[0037] In the above technical solution, the multi-layered structure of the clamping component combines rigid and flexible components. This rigid-flexible composite design allows the two materials to complement each other, achieving a dual effect of "flexible buffering + rigid constraint." The rigid component provides sufficient structural rigidity and load-bearing capacity to resist the expansion force generated during battery operation, prevent loosening after clamping, and ensure stable constraint force. The flexible component has good flexibility and buffering properties, which can both conform to the contour of the battery cell pack to achieve tight enclosure and buffer vibration impact and disperse stress. The synergistic effect of the two can improve the adaptability and reliability of the clamping component, extend its service life, and at the same time strengthen the protection and structural stability of the battery module.

[0038] In some embodiments, the second connecting portion is provided with a scale, and the main body is provided with a mark that is used in conjunction with the scale.

[0039] In the above technical solution, a scale is added to the second connecting part, and a matching mark is set at the corresponding position on the main body. Through the alignment and matching of the two, the insertion stroke and adjustment length of the tightening component can be intuitively fed back, making it convenient for operators to accurately control the tightening range. This structural design can realize precise and quantitative locking adjustment of battery modules of different specifications, uniformly control the pre-tightening force, keep the locking force within a reasonable range, reduce the squeezing effect of excessive locking force on battery cells, weaken the module displacement and loosening problems caused by insufficient locking force, improve the assembly consistency and adjustment accuracy of battery modules, and optimize assembly quality and structural stability.

[0040] In some embodiments, in a battery cell group, a plurality of battery cells are stacked along a second direction; the battery module further includes an end plate disposed at the end of the battery cell group in the second direction to form a module component; a fastening member surrounds the outer periphery of the module component; wherein, a receiving groove is provided at the end of the end plate away from the battery cell group in the second direction, and a portion of the structure of the fastening member can be inserted into the receiving groove.

[0041] In the above technical solution, the receiving groove can precisely limit the positioning of the clamping component, ensuring that the clamping component maintains its preset position when surrounding the battery cell assembly. This improves the alignment and uniformity of the clamping component with the end plate and battery cell assembly, strengthens the constraint effect of the clamping component on the battery cell assembly, and makes the restraining force more concentrated and stable. Simultaneously, embedding part of the clamping component structure into the receiving groove eliminates the need for additional installation space for the clamping component, effectively saving overall space occupied in the second direction. This results in a more compact battery module structure. While achieving the clamping and limiting function, it also considers space utilization and structural constraint performance, further optimizing the overall structural design and assembly rationality of the battery module.

[0042] Secondly, embodiments of this application also provide an electrical device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to provide or store electrical energy.

[0043] Thirdly, embodiments of this application also provide an energy storage device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to provide or store electrical energy. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a vehicle provided according to some embodiments of this application; Figure 2 This is an exploded structural diagram of a battery device provided according to some embodiments of this application; Figure 3 This is a three-dimensional structural diagram of a battery module provided according to some embodiments of this application; Figure 4 An exploded view of a constraint assembly (only a portion of the fastening element is shown) provided according to some embodiments of this application; Figure 5 Left view of a constraint assembly (only a portion of the structure of the fastener is shown) provided according to some embodiments of this application; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the AA direction; Figure 7 This is a front sectional view of a lock cylinder provided according to some embodiments of this application; Figure 8 This is a cross-sectional schematic diagram of a fastening member according to some embodiments of this application; Figure 9 This is a cross-sectional schematic diagram of another fastening member provided according to some embodiments of this application; Figure 10 This is a front view schematic diagram of the second connecting portion passing through the body according to some embodiments of this application; Figure 11 This is a three-dimensional structural diagram of an end plate provided according to some embodiments of this application.

[0046] The attached figures are labeled as follows: 1000 - Vehicles; 100 - Battery device, 110 - Battery module, 120 - Housing, 1201 - First housing section, 1202 - Second housing section; 200-Controller; 300-motor; 10-cell battery pack; 20-Constraint component, 21-Lock mechanism, 211-Body, 2111-Mounting hole, 2111a-Conical surface, 2112-Marker, 212-Locking unit, 2121-Lock cylinder, 2121a-Carrier, 2121a1-Through hole, 2121a2-Limiting hole, 2121b-Locking component, 2121c-First end, 2121d-Second end, 2122-Elastic component, 2123-Unlocking component, 2124-Blocking component, 2124a-Washer, 2124b-Retaining ring, 22-Tightening component, 221-First connecting part, 222-Second connecting part, 223-Layer structure, 224-Connecting structure, 225-Scale; 30 - End plate, 31 - Receiving groove. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] The term "embodiment" as used in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0050] The specific term "exemplary" used in the embodiments of this application means "serving as an example, embodiment, or illustration." Any embodiment illustrated as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0051] In the description of the embodiments of this application, the technical terms "first", "second", "third", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0052] In the description of the embodiments in this application, the technical term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0054] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of the embodiments of this application. They are only used to facilitate the description of the embodiments of this application and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0057] In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly specified.

[0058] In the description of the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0059] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0060] In traditional battery device structural designs, battery modules often employ a full-circle, encircling clamping and fixing scheme consisting of "two end plates + traditional single-layer steel cable ties." The core principle is to tighten the steel cable ties through the pre-tensioning force of the battery module, and to use screw holes on the side of the end plates along their thickness direction to reinforce the steel cable ties with fixing screws. This completes the module fixation, maintaining the module's geometric stability and structural integrity. Specifically, the battery cells generate expansion force during operation. This expansion force is absorbed by the two end plates of the battery module and then transferred to the outer steel cable ties. The tightening effect of the steel cable ties counteracts the expansion force, ensuring the reliability of the battery module structure.

[0061] However, existing steel cable tie fixing solutions have some technical problems in practical applications, affecting the structural stability and assembly convenience of battery modules. Specifically: steel cable ties have poor adaptability, are inconvenient to assemble, and are costly. In the current design, the steel cable ties are customized and connected into an integral ring structure by welding or other methods. In actual assembly, the module must first undergo an overpressure operation, which not only increases the assembly difficulty but also limits the clamping effect. In addition, different sized battery modules require corresponding steel cable ties of appropriate sizes, which not only significantly increases the design and management costs of parts but also restricts the product's flexibility, expansion, and iteration capabilities, making it impossible to flexibly adapt to the assembly needs of different module specifications.

[0062] To address the aforementioned issues, embodiments of this application provide a battery device, including a battery module. The battery module includes a battery cell group and a constraint assembly. The battery cell group includes multiple stacked battery cells. The constraint assembly includes a locking mechanism and a fastening member. The locking mechanism includes a body and a locking unit disposed on the body. The fastening member surrounds the outer periphery of the battery cell group. The fastening member has a first connecting portion and a second connecting portion at its two ends in the length direction. The first connecting portion is fixedly connected to the body, and the second connecting portion is engaged with the locking unit. The second connecting portion has multiple locking positions in the length direction. These multiple locking positions can engage with the locking unit and be locked or unlocked by the locking unit, allowing the fastening member to adjustably fix the multiple battery cells.

[0063] The beneficial effects of the battery device in the above scheme are as follows: By cooperating with the locking mechanism and the fastening component in the constraint assembly, and relying on the detachable connection structure between the locking unit of the locking mechanism and the second connection part of the fastening component, the locking and unlocking adjustment of different positions of the fastening component can be realized, so that the fastening component as a whole can be kept in an adjustable state; based on the fastening component's adjustable tightness characteristics, the actual size of the ring formed by the fastening component around the battery cell group can be flexibly changed, thereby adapting to the assembly and use of battery modules of different specifications and sizes, effectively broadening the scope of application of the structure and improving the overall adaptability; at the same time, with the help of the adjustable fastening structure of the fastening component, the pre-tightening force applied to the outside of the battery cell group can be adjusted as needed, so that the battery cell group can obtain a uniform and stable binding and pressing effect after stacking and assembling, ensuring the regularity and stability of the overall assembly structure of the battery module.

[0064] The technical solutions provided in this application are applicable to electrical equipment that uses battery devices as a power source and energy storage devices that use battery devices as energy storage elements. Electrical equipment can be vehicles, ships, spacecraft, etc. Energy storage devices can be energy storage containers, energy storage cabinets, etc.

[0065] For ease of description, this application uses the application of a battery device in a vehicle as an example for illustration.

[0066] refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0067] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0068] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device provided according to some embodiments of this application. The battery device 100 includes a battery module 110 and a housing 120. The housing 120 has a receiving cavity, in which the battery module 110 is received.

[0069] In some embodiments, the battery device 100 may include one or more battery modules 110 for providing voltage and capacity. The battery module 110 may include a battery cell assembly 10, which is typically formed by arranging multiple battery cells in series, parallel, or mixed connection via a busbar.

[0070] As an example, the battery module 110 consists of multiple battery cells arranged and fixed to form an independent module.

[0071] As an example, battery module 110 can be formed by bundling multiple battery cells together with cable ties.

[0072] In some embodiments, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0073] As an example, the battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited in this regard.

[0074] As an example, the battery cell can be a prismatic battery cell, which includes prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not limit this.

[0075] In some embodiments, the housing 120 may include a first housing portion 1201 and a second housing portion 1202. The first housing portion 1201 and the second housing portion 1202 are fastened together, forming a closed space inside the housing 120 to house the battery module 110. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0076] As an example, the housing 120 may include a top cover, a frame, and a bottom plate. The frame may be formed by multiple side walls, and the top cover and bottom plate may be connected to the frame respectively. The first housing portion 1201 may be either a top cover or a bottom plate; correspondingly, the second housing portion 1202 may be the main housing, which may be formed by combining the bottom plate and the frame or by combining the top cover and the frame.

[0077] In some embodiments, the housing 120 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 120 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 120 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0078] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings. The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0079] refer to Figures 3 to 6 , Figure 3 This is a three-dimensional structural diagram of a battery module provided according to some embodiments of this application; Figure 4 An exploded view of a constraint assembly (only a portion of the fastening element is shown) provided according to some embodiments of this application; Figure 5 Left view of a constraint assembly (only a portion of the structure of the fastener is shown) provided according to some embodiments of this application; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the AA direction.

[0080] Firstly, such as Figure 3As shown, an embodiment of this application provides a battery device 100, including a battery module 110. The battery module 110 includes a battery cell group 10 and a constraint component 20. The battery cell group 10 includes a plurality of stacked battery cells. The constraint component 20 includes a locking mechanism 21 and a fastening member 22. The locking mechanism 21 includes a body 211 and a locking unit 212 disposed on the body 211. The fastening member 22 surrounds the outer periphery of the battery cell group 10. The fastening member 22 has a first connecting portion 221 and a second connecting portion 222 at its two ends in the longitudinal direction. The first connecting portion 221 is fixedly connected to the body 211, and the second connecting portion 222 is engaged with the locking unit 212. The second connecting portion 222 has a plurality of locking positions in the longitudinal direction. The plurality of locking positions can respectively engage with the locking unit 212 and be locked or unlocked by the locking unit 212, so that the fastening member 22 can adjustably fix the plurality of battery cells.

[0081] Specifically, in the battery cell group 10, the stacking of multiple battery cells can be arranged by stacking multiple battery cells together in sequence along a certain straight line direction. These battery cells can be arranged facing each other or staggered in this straight line direction.

[0082] In the constraint assembly 20, the fastening member 22 can be a rope or strip structure with a certain length. The length of the fastening member 22 is usually greater than the outer perimeter of the battery cell group 10. The cooperation between the fastening member 22 and the locking mechanism 21 can clamp and fix the stacked battery cells.

[0083] In this embodiment, as Figures 4 to 6 As shown, the first connecting part 221 at one end of the fastening member 22 can refer to a section of the fastening member 22 along its length direction, specifically the part of the fastening member 22 that connects to the body 211 of the locking mechanism 21.

[0084] It should be understood that the fixed connection between the first connecting part 221 and the body 211 can be a non-removable connection or a detachable fixed connection. Among them, the non-removable connection method can be crimping, bonding, injection molding, etc.; the detachable fixed connection can be the first connecting part 221 cooperating with another locking unit 212 or the first connecting part 221 cooperating with a locking structure with a similar function to the locking unit 212, etc.

[0085] In this embodiment, as Figures 4 to 6 As shown, the second connecting part 222 at the other end of the fastening member 22 can refer to a section of the fastening member 22 along its length direction, specifically the part of the fastening member 22 that cooperates with the locking unit 212.

[0086] In addition, the second connecting part 222 can also be defined as a section of the fastening member 22 of a specific length; for example, the section of the fastening member 22 extending from the other end of the fastening member 22 along the length of the fastening member 22 to 200 mm can be defined as the second connecting part 222; of course, the length of this section can also be 300 mm, 400 mm, etc., which can be adapted to the battery module 110 of different specifications and application scenarios; at the same time, the second connecting part 222 can usually pass through the body 211, so that the two sides of the body 211 can have part of the structure of the second connecting part 222 to facilitate the adjustment of the tightness of the fastening member 22.

[0087] In this embodiment, the second connecting portion 222 is provided with multiple locking positions along its length. These locking positions can respectively cooperate with the locking unit 212 and be locked or unlocked by the locking unit 212. For example, the second connecting portion 222 is provided with a first position and a second position along its length. These two positions are not equidistant from the same end of the fastening member 22. When the locking unit 212 is engaged with the first position of the second connecting portion 222, the actual size of the ring formed by the fastening member 22 around the battery cell assembly 10 is the first size. When the locking unit 212 is engaged with the second position of the second connecting portion 222, the actual size of the ring formed by the fastening member 22 around the battery cell assembly 10 is the second size. Since the first and second sizes are not equal, the tightness of the fastening member 22 can be adjusted to accommodate battery modules 110 of different sizes or to regulate the pre-tightening force on the battery cell assembly 10.

[0088] It should be understood that multiple locking positions may be distributed at intervals along the length of the second connecting portion 222; or, multiple locking positions may be arranged continuously along the length of the second connecting portion 222.

[0089] Furthermore, the locking method between the locking unit 212 and the second connecting part 222 can be either purely mechanical or electrically controlled. For purely mechanical locking, the limit locking can be achieved through mechanical cooperation between structural components, requiring no electric drive and completing locking and unlocking entirely through mechanical structural linkage. For electrically controlled locking, electrical signals control the movement of driving components, cooperating with the mechanical structure to achieve automated locking and unlocking, adapting to intelligent management requirements.

[0090] In the above technical solution, by cooperating with the locking mechanism 21 and the fastening member 22 in the constraint component 20, and relying on the detachable and detachable structure of the locking unit 212 of the locking mechanism 21 and the second connecting part 222 of the fastening member 22, the locking and unlocking adjustment of different positions of the fastening member 22 can be realized, so that the fastening member 22 can be kept in an adjustable state. Based on the adjustable fastening characteristics of the fastening member 22, the actual size of the ring formed by the fastening member 22 around the battery cell group 10 can be flexibly changed, thereby adapting to the assembly and use of battery modules 110 of different specifications and sizes, effectively broadening the scope of application of the structure and improving the overall adaptability. At the same time, with the help of the adjustable fastening structure of the fastening member 22, the pre-tightening force applied to the outside of the battery cell group 10 can be adjusted as needed, so that the battery cell group 10 can obtain a uniform and stable binding and pressing effect after stacking and assembling, ensuring the regularity and stability of the overall assembly structure of the battery module 110.

[0091] refer to Figures 4 to 7 , Figure 7 This is a front view sectional view of a lock cylinder provided according to some embodiments of this application.

[0092] In some embodiments, such as Figure 6 and Figure 7 As shown, the main body 211 is provided with a mounting hole 2111, and a conical surface 2111a is provided inside the mounting hole 2111; the locking unit 212 includes a locking member 2121b, which is movably disposed inside the mounting hole 2111; wherein, when the locking member 2121b is configured to press against the mounting hole 2111, the locking member 2121b can simultaneously abut against the conical surface 2111a and the second connecting part 222 to lock the second connecting part 222; when the locking member 2121b is configured to move in a direction away from the conical surface 2111a or the second connecting part 222, the second connecting part 222 can be unlocked.

[0093] It is understandable that when the locking member 2121b is configured to press against the mounting hole 2111, the locking member 2121b can simultaneously abut against the conical surface 2111a and the second connecting part 222. This means that a stable abutting fit relationship is formed between the locking member 2121b, the conical surface 2111a, and the second connecting part 222, thereby locking the second connecting part 222.

[0094] The locking member 2121b is configured to move in a direction away from the conical surface 2111a or the second connecting portion 222, including moving the locking member 2121b in a direction away from the conical surface 2111a and moving the locking member 2121b in a direction away from the second connecting portion 222. When the locking member 2121b moves in either of these directions, the abutting contact between the locking member 2121b and the conical surface 2111a and the second connecting portion 222 can be released. For example, when the locking member 2121b moves in a direction away from the conical surface 2111a, the locking member 2121b and the conical surface 2111a no longer abut against each other, and the abutting contact formed by the locking member 2121b, the conical surface 2111a and the second connecting portion 222 is released, thereby releasing the locking of the second connecting portion 222. For example, when the locking member 2121b moves in a direction away from the second connecting part 222, the locking member 2121b and the second connecting part 222 no longer come into contact, and the abutting fit relationship formed by the locking member 2121b, the conical surface 2111a and the second connecting part 222 is released, thereby releasing the locking of the second connecting part 222.

[0095] It should be noted that by providing a conical surface 2111a in the mounting hole 2111 of the main body 211, and movably assembling the locking member 2121b of the locking unit 212 inside the mounting hole 2111, the locking and unlocking functions of the second connecting part 222 can be realized by switching the displacement state of the locking member 2121b.

[0096] Specifically, when the locking element 2121b is pressed into the mounting hole 2111, it simultaneously forms an abutting fit with the conical surface 2111a and the second connecting part 222. Utilizing the structural guidance and abutting support of the conical surface 2111a, the abutting force of the locking element 2121b effectively acts on the second connecting part 222, keeping it fixed and achieving stable locking. When the locking element 2121b moves away from the conical surface 2111a or the second connecting part 222, the abutting fit between the locking element 2121b and either is released, and the constraint on the second connecting part 222 is released, allowing for free insertion and adjustment. This movable structure, combined with the linkage design of the conical surface 2111a, allows for flexible switching between locking and unlocking conditions, improving the flexibility and adaptability of the tightening structure adjustment. Simultaneously, the bidirectional abutting fit enhances the structural tightness in the locked state, ensuring the overall stability of the locking structure.

[0097] In some embodiments, such as Figure 6 and Figure 7As shown, the locking unit 212 also includes a carrier 2121a, which has a through hole 2121a1 through which the second connecting part 222 passes. A limiting hole 2121a2 is formed on the wall of the hole of the carrier 2121a, and the locking member 2121b is movably inserted into the limiting hole 2121a2. The locking member 2121b is movably inserted into the limiting hole 2121a2, and the part of the locking member 2121b placed in the through hole 2121a1 can contact the second connecting part 222. The part of the locking member 2121b placed outside the through hole 2121a1 can contact the conical surface 2111a.

[0098] It should be noted that the carrier 2121a has a through hole 2121a1 for the second connecting part 222 to pass through and a limiting hole 2121a2 for assembling the lock 2121b. The lock 2121b is positioned by the limiting hole 2121a2, so that the lock 2121b is divided into two sections, one inside and one outside the through hole 2121a1. The inner section of the through hole 2121a1 can contact the second connecting part 222, and the outer section can cooperate with the conical surface 2111a.

[0099] As the carrier 2121a moves relative to the conical surface 2111a, the conical surface 2111a can drive the locking member 2121b to move along the limiting hole 2121a2 through the exposed section of the locking member 2121b, thereby changing the contact and pressing degree of the locking member 2121b and the second connecting part 222. The step-by-step transmission of force is achieved by relying on the segmented contact layout, which helps to refine the linkage logic of the locking action, allowing the displacement force of the conical surface 2111a to be smoothly transmitted to the second connecting part 222 through the locking member 2121b, optimizing the linkage smoothness of the locking and unlocking process, and improving the fit between the components.

[0100] Furthermore, such as Figure 6 and Figure 7 As shown, the limiting hole 2121a2 is configured to allow the locking member 2121b to move radially along the through hole 2121a1, and to restrict the locking member 2121b from completely disengaging from the limiting hole 2121a2.

[0101] It should be noted that the limiting hole 2121a2 limits the movement of the locking member 2121b, and can guide the locking member 2121b to move radially along the through hole 2121a1, providing a space for the locking member 2121b to engage with the conical surface 2111a and the second connecting part 222, so that the structures can fit together and help complete the locking operation of the second connecting part 222.

[0102] Meanwhile, the limiting hole 2121a2 can constrain the travel of the locking component 2121b, control the range of motion of the locking component 2121b, keep the locking component 2121b always in the corresponding position of the lock cylinder 2121, maintain the integrated assembly state of the locking component 2121b and the lock cylinder 2121, reduce the misalignment of the locking component 2121b, maintain the unobstructed passage space of the through hole 2121a1 of the lock cylinder 2121, facilitate the smooth insertion and installation of the second connecting part 222 of the fastening component 22, optimize the overall assembly operation process, and improve the structural integrity and operational stability of the locking unit 212 during long-term use.

[0103] Furthermore, such as Figure 7 As shown, the locking element 2121b is a sphere; the limiting hole 2121a2 is a variable diameter hole with a larger diameter in the middle and smaller diameter at both ends along the radial direction of the through hole 2121a1; wherein, the maximum diameter of the limiting hole 2121a2 is greater than the diameter of the sphere, and the minimum diameter of the limiting hole 2121a2 is less than the diameter of the sphere.

[0104] Understandably, during assembly, the principle of thermal expansion and contraction can be used to achieve rapid assembly: on the one hand, the carrier 2121a of the lock cylinder 2121 can be heated to expand the diameter of the limiting hole 2121a2, and then the lock part 2121b can be placed into the limiting hole 2121a2. After the carrier 2121a cools and contracts naturally, the lock part 2121b can be stably accommodated in the limiting hole 2121a2, thus completing the assembly; on the other hand, the lock part 2121b can also be pre-cooled to reduce its external dimensions, making it easier to insert into the limiting hole 2121a2. After the lock part 2121b returns to normal temperature and its dimensions are reset, the dimensional constraint of the variable diameter hole can be used to achieve reliable assembly and limiting cooperation between the lock part 2121b and the carrier 2121a of the lock cylinder 2121.

[0105] It should be noted that the locking component 2121b is designed as a spherical structure, and the limiting hole 2121a2 is designed as a variable diameter hole structure with a larger diameter in the middle and smaller diameters at both ends along the radial direction of the through hole 2121a1. Based on the dimensional fit, the maximum diameter of the limiting hole 2121a2 is larger than the outer diameter of the sphere, and the minimum diameter is smaller than the outer diameter of the sphere. The variable diameter limiting hole 2121a2 can reserve radial movement allowance for the spherical locking component 2121b, which facilitates the flexible displacement of the spherical locking component 2121b, better adapts to the contact fit between the conical surface 2111a and the second connecting part 222, and smoothly achieves locking linkage.

[0106] Meanwhile, the small-diameter structures at both ends of the variable-diameter hole can limit the spherical lock 2121b, so that the ball is always contained inside the limiting hole 2121a2 and maintained in the assembled state, maintaining the integrity of the overall structure of the lock cylinder 2121, ensuring the passage space of the through hole 2121a1 of the lock cylinder 2121, facilitating the normal insertion and assembly of the second connecting part 222, and improving the overall structural fit accuracy and long-term structural stability.

[0107] Furthermore, such as Figures 4 to 7 As shown, there are multiple limiting holes 2121a2, and the multiple limiting holes 2121a2 are distributed circumferentially along the through hole 2121a1; wherein, each limiting hole 2121a2 is respectively equipped with a locking piece 2121b.

[0108] Optionally, multiple limiting holes 2121a2 are evenly distributed along the circumference of the through hole 2121a1.

[0109] It should be noted that multiple limiting holes 2121a2 are provided circumferentially along the through hole 2121a1, and each limiting hole 2121a2 is configured with a corresponding locking member 2121b, forming a multi-set locking member 2121b and limiting hole 2121a2 mating structure. The multiple sets of locking members 2121b are distributed circumferentially along the through hole 2121a1, and can simultaneously abut against the second connecting part 222 from multiple directions on the outer periphery of the second connecting part 222. Combined with the cooperation of the conical surface 2111a and the elastic member 2122, the locking force can be transmitted to the second connecting part 222 relatively evenly, improving the stability and reliability of locking the second connecting part 222, and making the locking state of the fastening member 22 more stable.

[0110] At the same time, the coordinated action of multiple locking components 2121b can enhance the tightness of the fit between the lock cylinder 2121 and the second connecting part 222, optimize the structural linkage effect, make the locking and unlocking process smoother, and further improve the overall working performance and structural adaptability of the locking unit 212.

[0111] In some embodiments, such as Figure 4 , Figure 6 and Figure 7 As shown, the carrier 2121a and the locking member 2121b are assembled together to form the lock cylinder 2121; the locking unit 212 also includes an elastic member 2122, which provides elastic force and presses the lock cylinder 2121 into the mounting hole 2111, so that the locking member 2121b can simultaneously abut against the conical surface 2111a and the second connecting part 222 to lock the second connecting part 222.

[0112] Among them, the elastic element 2122 outputs elastic force to press the lock cylinder into the mounting hole, so that the lock element 2121b abuts against the conical surface 2111a and the second connecting part 222, thereby locking the second connecting part 222 to maintain the fastening element 22 locked.

[0113] Furthermore, the locking unit 212 also includes an unlocking member 2123, which is used to overcome the elastic force of the elastic member 2122 and drive the lock cylinder 2121 to move, so as to unlock the second connecting part 222.

[0114] Among them, the unlocking component 2123 can overcome the elastic force to drive the lock cylinder 2121 to move, unlock, and complete the loosening and adjustment of the fastening component 22, which has the characteristics of smooth operation and efficient adjustment.

[0115] Optionally, such as Figure 6 As shown, after the lock cylinder 2121 is assembled into the mounting hole 2111, it can correspond to the conical surface 2111a area of ​​the mounting hole 2111.

[0116] Optionally, such as Figure 4 As shown, the carrier 2121a of the lock cylinder 2121 can be roughly a cylindrical structure, and a snap-fit ​​groove can be provided at one end near the elastic element 2122 to facilitate assembly and fixation with the elastic element 2122.

[0117] Optionally, such as Figure 4 As shown, the elastic element 2122 is a component capable of providing elastic force to the lock cylinder 2121; for example, the elastic element 2122 can be a compression spring, specifically a tower-shaped compression spring. The compression spring can be coaxially arranged with the through hole 2121a1 of the carrier 2121a.

[0118] Optionally, such as Figure 4 and Figure 6 As shown, the unlocking component 2123 can be roughly a cylindrical structure, and it can be coaxially arranged with the through hole 2121a1 of the carrier 2121a.

[0119] Optionally, such as Figure 6 As shown, the unlocking element 2123 is in contact with the carrier 2121a, and the two can be fixedly connected or in abutting connection. When the unlocking element 2123 is in abutting connection with the carrier 2121a, the unlocking element 2123 can be movably connected to the body 211; for example, the unlocking element 2123 can move within a certain range under the constraint of the mounting hole 2111, and the movement of the unlocking element 2123 can be used to drive the lock cylinder 2121 to move.

[0120] It should be noted that the main body 211 and locking unit 212 of the lock mechanism 21 are arranged in a structured manner. The main body 211 has a mounting hole 2111 with a conical surface 2111a. The locking unit 212 is composed of a lock cylinder 2121, an elastic element 2122 and an unlocking element 2123. The overall structure is well-organized and has strong linkage.

[0121] Specifically, the lock cylinder 2121 forms a mating structure with the carrier 2121a, the through hole 2121a1 and the movable locking member 2121b. The second connecting part 222 can pass through the through hole 2121a1 of the carrier 2121a to achieve insertion assembly. The locking member 2121b, relying on the movable installation form, can simultaneously contact the second connecting part 222 and the conical surface 2111a of the body 211. The elastic member 2122 continuously outputs elastic force to stably press the lock cylinder 2121 into the mounting hole 2111, so that the locking member 2121b maintains a close contact state with the conical surface 2111a and the second connecting part 222. Relying on the inclined limiting fit of the conical surface 2111a and the elastic force of the elastic member 2122, the second connecting part 222 is reliably locked, and the locking state of the fastening member 22 is maintained.

[0122] In addition, the unlocking component 2123 can reverse the elastic force of the elastic component 2122 and drive the lock cylinder 2121 to move, changing the abutting relationship between the lock component 2121b and the conical surface 2111a and the second connecting part 222, thereby releasing the locking restriction on the second connecting part 222, and thus completing the loosening and unloading adjustment of the fastening component 22, making the overall locking and unlocking operation smooth and controllable, the structural linkage is tight, and the adjustment method is simple and efficient.

[0123] Furthermore, such as Figure 6 and Figure 7 As shown, the mounting hole 2111 penetrates the body 211 along the first direction; the lock cylinder 2121 has a first end 2121c and a second end 2121d at its two ends in the first direction, and the direction from the first end 2121c to the second end 2121d is consistent with the direction from the small diameter end of the conical surface 2111a to its large diameter end; wherein, the unlocking member 2123 is disposed at the first end 2121c, and the elastic member 2122 is disposed at the second end 2121d.

[0124] It should be understood that the first direction may include two opposite directions, one of which may be the direction from the first end 2121c to the second end 2121d.

[0125] Optionally, the mounting hole 2111 can be divided into multiple segments along the first direction. For example, as shown... Figure 6 As shown, the mounting hole 2111 can be divided into a small cylindrical cavity, a conical cavity, a large cylindrical cavity, and a mounting cavity in sequence along the direction from the first end 2121c to the second end 2121d. The small cylindrical cavity can be used to assemble the unlocking component 2123, the cavity wall of the conical cavity is the conical surface 2111a and the conical cavity can be used to accommodate the lock cylinder 2121, the large cylindrical cavity can be used to assemble the elastic component 2122, and the mounting cavity can be used to assemble the blocking component 2124 mentioned later or a structure that can cooperate with the elastic component 2122.

[0126] Optionally, such as Figure 6As shown, taking the carrier 2121a of the lock cylinder 2121 as a cylindrical structure, the unlocking component 2123 as a cylindrical structure, and the elastic component 2122 as a compression spring as an example, the carrier 2121a, the unlocking component 2123, and the elastic component 2122 are coaxially arranged and their axial directions are consistent with the first direction. By arranging the cylindrical structure or compression spring in this way, the fastening component 22 can smoothly pass through the mounting hole 2111, and the operation is more convenient.

[0127] It should be noted that the mounting hole 2111 penetrates the body 211 along the first direction. At the same time, the orientation of the two ends of the lock cylinder 2121, the arrangement of the conical surface 2111a, and the installation positions of the unlocking member 2123 and the elastic member 2122 are reasonably arranged so that the direction from the first end 2121c of the lock cylinder 2121 to the second end 2121d is consistent with the direction from the small diameter end of the conical surface 2111a to the large diameter end. The unlocking member 2123 is located at the first end 2121c of the lock cylinder 2121, and the elastic member 2122 is located at the second end 2121d of the lock cylinder 2121. This layout allows the force and movement direction of each component to be matched with each other. The elastic element 2122 continuously applies elastic force to the second end 2121d of the lock cylinder 2121, which can smoothly push the lock cylinder 2121 to move towards the small diameter end of the conical surface 2111a along the first direction, so that the lock element 2121b can stably abut against the conical surface 2111a and the second connecting part 222, ensuring reliable locking of the second connecting part 222.

[0128] At the same time, when the unlocking component 2123 exerts force at the first end 2121c of the lock cylinder 2121, it can overcome the elastic force of the elastic component 2122 in the opposite direction along the first direction, and drive the lock cylinder 2121 to move towards the large diameter end of the conical surface 2111a, easily releasing the abutment constraint between the locking component 2121b and the conical surface 2111a and the second connecting part 222, thereby achieving unlocking.

[0129] In addition, the reasonable layout of the overall structure allows for smoother transmission of locking and unlocking forces, making operation more convenient, while also improving the coordination and structural stability of the components in the locking unit 212.

[0130] Furthermore, such as Figure 6 As shown, the end of the unlocking component 2123 that is away from the lock cylinder 2121 in the first direction protrudes from the body 211.

[0131] It is understandable that the end of the unlocking component 2123 away from the lock cylinder 2121 along the first direction protrudes out of the outer side of the body 211. With the help of this outward protruding structural layout, an action part that is easy to contact and operate can be formed on the outside of the body 211, and the operator can directly apply force to the unlocking component 2123.

[0132] It should be noted that this structural arrangement simplifies the force application process during unlocking, reduces the operational difficulty of the unlocking component 2123, makes the displacement driving process of the lock cylinder 2121 more convenient and smooth, effectively improves the convenience of locking and unlocking operations of the fastening component 22, and optimizes the operational adaptability and user experience of the overall structure.

[0133] Furthermore, such as Figures 4 to 6 As shown, the locking unit 212 also includes a blocking member 2124, which is connected to the body 211 and disposed at the end of the elastic member 2122 away from the lock cylinder 2121 in the first direction, so as to restrict the elastic member 2122 and the lock cylinder 2121 within the mounting hole 2111.

[0134] For example, a specific structure of the blocking member 2124 may be: as follows Figures 4 to 6 As shown, the blocking member 2124 includes a washer 2124a and a retaining ring 2124b. A stepped cavity is provided within the mounting hole 2111. The washer 2124a is installed in the smaller diameter cavity of the stepped cavity and can abut against the end of the elastic member 2122 away from the lock cylinder 2121. The retaining ring 2124b is located at the end of the washer 2124a away from the elastic member 2122. The retaining ring 2124b can be engaged within the larger diameter cavity of the stepped cavity and can confine the washer 2124a within the smaller diameter cavity of the stepped cavity, achieving positioning and fixation with the body 211. The central holes of the washer 2124a and the retaining ring 2124b can be coaxially aligned with the through hole 2121a1 of the carrier 2121a in the lock cylinder 2121, thus facilitating the insertion of the fastening member 22 through the mounting hole 2111.

[0135] Optionally, such as Figure 4 As shown, the retaining ring 2124b can be an elastic ring with a notch, which can be assembled into the large-diameter cavity of the stepped cavity and fixedly engaged with the body 211 by utilizing its own elastic deformation.

[0136] It should be noted that a blocking member 2124 connected to the body 211 is added to the end of the elastic element 2122 facing away from the lock cylinder 2121. Relying on the blocking and limiting effect of the blocking member 2124, the elastic element 2122 and the lock cylinder 2121 can be constrained together in the internal space of the mounting hole 2111. During the assembly process, the lock cylinder 2121 and the elastic element 2122 can be sequentially installed into the mounting hole 2111, and then the end positioning is completed by the blocking member 2124. The orderly and standardized assembly process of each part can improve the overall assembly efficiency and convenience of the locking unit 212.

[0137] Meanwhile, the blocking member 2124 can provide stable end support for the elastic member 2122, help the elastic member 2122 maintain a regular force shape, maintain the continuous and uniform elastic pushing action of the elastic member 2122 on the lock cylinder 2121, and also limit the positional displacement of the lock cylinder 2121 and the elastic member 2122 during operation, enhance the matching accuracy of each component inside the locking unit 212, and improve the overall assembly integrity and long-term structural stability.

[0138] Furthermore, the second connecting portion 222 is connected to the locking unit 212, enabling the fastening member 22 to form a ring; wherein, when the second connecting portion 222 passes through the lock cylinder 2121 in the direction from the first end 2121c to the second end 2121d, the ring tightens and shrinks; and when the second connecting portion 222 passes through the lock cylinder 2121 in the direction from the second end 2121d to the first end 2121c, the ring expands and enlarges.

[0139] It is understandable that the second connecting part 222 and the locking unit 212 cooperate with each other to enable the fastening member 22 to stably enclose and form a closed ring. By relying on the interlacing movement of the second connecting part 222 in different directions, the size of the ring can be flexibly adjusted.

[0140] It should be noted that when the second connecting part 222 is inserted into the lock cylinder 2121 from the first end 2121c toward the second end 2121d, the tightening member 22 can be gradually tightened, causing the enclosed ring to tighten and the inner diameter to decrease; when the second connecting part 222 is inserted out from the second end 2121d toward the first end 2121c of the lock cylinder 2121, the tightening member 22 can be gradually loosened, allowing the ring to gradually expand and increase in size. Relying on the bidirectional interlocking motion, the enclosure range and binding force of the tightening member 22 can be continuously and flexibly adjusted to adapt to the assembly requirements of battery cell packs 10 of different sizes, and the pre-tightening degree of the battery module 110 can also be precisely controlled, improving the overall structural adaptability and assembly adjustment flexibility of the battery device 100.

[0141] In related technologies, existing steel cable tie fixing solutions still have some technical problems in practical applications, which seriously affect the structural stability and product flexibility of the battery module 110. Specifically, the steel cable ties are prone to breakage, and there are bottlenecks in improving structural strength. The existing steel cable ties are relatively thin. When the expansion force generated by the battery cell 10 is uneven, the connection of the steel cable tie and other weak areas of the structure are prone to breakage. If the traditional high-strength steel cable tie is thickened to 2mm to improve the tightening strength and structural rigidity, the high strength and low ductility of the high-strength steel material will easily cause cracking, springback, and molding failure at the bending radius, making mass production and processing difficult. At the same time, due to the internal space layout of the battery module 110, widening the cable tie height will cause spatial interference and increase the overall weight of the module, which is not feasible in practice.

[0142] In some embodiments, the fastening member 22 is a flexible member, and the ultimate breaking tensile force of the fastening member 22 is 5kN to 30kN. For example, the ultimate breaking tensile force of the fastening member 22 can be 5kN, 6kN, 8kN, 10kN, 15kN, 20kN, 25kN, 30kN, etc.

[0143] It is understandable that by setting the fastening element 22 as a flexible element and limiting its ultimate breaking tensile force to the range of 5kN to 30kN, the flexibility and structural strength of the fastening element 22 are balanced.

[0144] It should be noted that the flexibility of the fastening element 22 allows it to better conform to the outer contour of the battery cell assembly 10, adapting to battery cell assemblies 10 with different shapes and regularities, achieving a tight enclosure. Simultaneously, it allows for flexible deformation adjustment according to the ring size, improving the convenience of the fastening operation. The ultimate breaking tensile force of 5kN to 30kN provides the fastening element 22 with sufficient structural strength, enabling it to maintain structural integrity when applying stable pre-tightening force to the battery cell assembly 10 and enduring long-term restraint stress, preventing breakage or deformation. This ensures the stability of the fastening and fixing effect and adapts to the assembly stress requirements of the battery module 110. Thus, the fastening element 22 possesses both flexible adaptability and reliable load-bearing capacity, further improving the operational reliability and service life of the entire restraint assembly 20.

[0145] Furthermore, the fastening element 22 is a component made of flexible wire braid.

[0146] Optionally, the fastening element 22 can be a rope structure or a strip structure made of flexible wire.

[0147] Optionally, the flexible wire used for the braided fastening element 22 can be steel wire or yarn. The types of fastening elements 22 woven from these materials include, but are not limited to, steel wire rope, aramid rope (Kevlar), glass fiber reinforced nylon rope, carbon fiber composite rope, and polyurethane elastic rope. In practical applications, the specific material of the fastening element 22 can be selected tailored to the performance requirements of different battery devices 100, taking into account core characteristics such as weather resistance, lightweight, and high temperature resistance. This ensures that the performance of the fastening element 22 matches the operating conditions of the battery device 100, guaranteeing both the restraint effect and service life.

[0148] It should be noted that the fastening component 22 is made of flexible braided wire. Compared with the single-layer thickened structure design, the braided component has better comprehensive mechanical properties and deformation adaptability. The braided structure allows the fastening component 22 to have higher overall tensile strength and fatigue resistance while maintaining good flexibility. It can continuously withstand the expansion force generated by the battery cell pack 10 during operation and achieve stable restraint.

[0149] Meanwhile, the inherent flexibility of the woven material can moderately buffer vibration and impact loads during equipment operation, weaken the rigid effect of external forces on the battery module 110, buffer stress transmission between structures, effectively improve the stability and reliability of the overall assembly structure of the battery module 110, and extend the service life of the constraint component 20.

[0150] refer to Figure 8 and Figure 9 , Figure 8 This is a cross-sectional schematic diagram of a fastening member according to some embodiments of this application; Figure 9 This is a cross-sectional schematic diagram of another fastening member provided according to some embodiments of this application.

[0151] In some embodiments, such as Figure 8 and Figure 9 As shown, the fastening member 22 is a component made of multiple layered structures 223; wherein, the multiple layered structures 223 are stacked along the thickness direction of any one layered structure 223; or, any two adjacent layered structures 223 among the multiple layered structures 223 are nested inside and outside each other.

[0152] Optionally, a connecting structure 224 (connecting layer) can be provided between two adjacent layer structures 223 to enhance the connection strength and structural stability between the two adjacent layer structures 223. For example, the connecting structure 224 can be an adhesive layer, allowing the two adjacent layer structures 223 to be fixed together by adhesive.

[0153] It should be noted that the fastening member 22 is configured as a multi-layered composite structure 223. Each layer of the structure 223 can be arranged in a stacked manner along the thickness direction or in a combination of nested inner and outer adjacent layers, which is different from the traditional single-layer thickening molding method. This multi-layered composite structure design can replace the processing method of integral bending of high-strength thick plates, and weaken the deformation defects and stress concentration problems that are prone to occur during the integral molding of thick plates. Through the synergistic load-bearing effect of the multi-layered structure 223, the overall tensile strength and structural stiffness of the fastening member 22 can be effectively improved. The cooperation of the multiple layers can also evenly distribute the stress load and optimize the stress distribution.

[0154] Meanwhile, the layered or nested combination can flexibly adjust the overall mechanical properties of the fastening component 22, optimize the processability of component processing and forming while ensuring the binding and locking effect, and improve the overall structural consistency of the fastening component 22 and its stability under long-term stress conditions.

[0155] Furthermore, the multiple layered structure 223 includes a combination structure of rigid and flexible components.

[0156] It is understandable that the multiple layer structures 223 of the fastening member 22 adopt a combination of rigid and flexible components. Compared with the single-material layer structure 223, this rigid-flexible composite design can achieve the complementary integration of the advantages of the two materials and achieve the dual effect of "flexible buffering + rigid constraint".

[0157] It should be noted that, taking the combination structure of the outer aluminum alloy strip and the inner carbon fiber composite rope of the fastening component 22 as an example, the rigid component provides sufficient structural rigidity and load-bearing capacity for the fastening component 22. For example, the outer aluminum alloy strip can effectively improve the overall rigidity of the fastening component 22, prevent the rope from loosening after tightening, ensure stable constraint force on the battery cell assembly 10, and effectively resist the high expansion force generated during battery operation. The flexible component gives the fastening component 22 good flexibility and buffering performance, similar to the characteristics of the inner carbon fiber composite rope. It can both fit the outer contour of the battery cell assembly 10 to achieve tight enclosure and provide appropriate buffering and stress transmission when the equipment generates vibration and impact during operation. The two work together to give the fastening component 22 both reliable rigid constraint capacity to ensure locking effect and flexible buffering characteristics to adapt to complex working conditions, further improving the adaptability and service life of the fastening component 22, while strengthening the protection and structural stability of the battery module 110.

[0158] refer to Figure 10 , Figure 10 This is a front view schematic diagram of the structure in which a second connecting portion passes through the body according to some embodiments of this application.

[0159] In some embodiments, such as Figure 10 As shown, the second connecting part 222 is provided with a scale 225, and the main body 211 is provided with a mark 2112 that is used in conjunction with the scale 225.

[0160] Optionally, the mark 2112 may be a mark formed on the surface of the body 211 or an end face on the body 211.

[0161] For example, the mark 2112 is the end face of the body 211 near the blocking member 2124 in the first direction, and the scale 225 is formed on the outer peripheral surface of the second connecting part 222. When the fastening member 22 passes through the locking unit 212 in the direction from the first end 2121c to the second end 2121d, the scale 225 and the mark 2112 can be aligned and engaged.

[0162] It should be noted that a scale 225 is added to the second connecting part 222, and a corresponding mark 2112 is set at the corresponding position on the main body 211. Through the alignment and cooperation of the scale 225 and the mark 2112, the insertion stroke and adjustment length of the fastening member 22 can be intuitively fed back. The operator can accurately control the tightening range of the fastening member 22 according to the value of the scale 225. This enables quantitative and precise locking adjustment of battery modules 110 of different specifications, facilitates unified control of the pre-tightening force of the fastening member 22 on the battery cell group 10, keeps the locking force within a reasonable range, reduces the impact of excessive locking force on the battery cells, and also weakens the problem of battery module 110 displacement and loose fit caused by insufficient locking force. This effectively improves the assembly consistency and locking adjustment accuracy of the battery module 110, and further optimizes the overall assembly quality and structural fit stability.

[0163] refer to Figure 3 and Figure 11 , Figure 11 This is a three-dimensional structural diagram of an end plate provided according to some embodiments of this application.

[0164] In some embodiments, such as Figure 3 and Figure 11 As shown, in the battery cell pack 10, multiple battery cells are stacked along the second direction; the battery module 110 also includes an end plate 30, which is disposed at the end of the battery cell pack 10 in the second direction to form a module component; a fastening member 22 surrounds the outer periphery of the module component; wherein, the end plate 30 is provided with a receiving groove 31 at the end away from the battery cell pack 10 in the second direction, and a part of the structure of the fastening member 22 can be placed into the receiving groove 31.

[0165] Optionally, the second direction may be the same as or different from the first direction.

[0166] For example, the battery cell group 10 may include a plurality of battery cells arranged and stacked along a second direction. Each battery cell may be prismatic and may include a housing and an electrode assembly disposed within the housing. The housing may be formed by a plurality of walls, with the wall having the largest area being the large surface of the battery cell. Along the second direction, the large surfaces of adjacent battery cells in the battery cell group 10 abut against each other.

[0167] Optionally, there are two end plates 30, and the two end plates 30 are respectively disposed at both ends of the battery cell pack 10 along the second direction. Each end plate 30 may be provided with a receiving groove 31.

[0168] Optionally, each battery cell pack 10 may be configured with two fastening members 22, which may be arranged vertically relative to each other around the outer periphery of the battery cell pack 10.

[0169] Optionally, each end plate 30 is provided with two receiving grooves 31, and the two receiving grooves 31 on the same end plate 30 are used in conjunction with different fastening members 22.

[0170] It should be noted that multiple battery cells are stacked along the second direction to form a battery cell group 10. The end plate 30 is correspondingly set at the end of the battery cell group 10 in the second direction, and plays the role of assisting in fixing the battery cell group 10 and transmitting the tightening force. A receiving groove 31 is opened at the end of the end plate 30 away from the battery cell group 10, so that part of the structure of the tightening member 22 can be embedded therein, which can achieve a two-way improvement of limiting function and space optimization.

[0171] Meanwhile, from the perspective of limiting constraints, the receiving groove 31 can precisely limit the position of the fastening member 22, so that when the fastening member 22 surrounds the battery cell group 10 and applies binding force, it always maintains the preset enclosure trajectory, avoiding displacement or offset. In this way, the force of the fastening member 22 can be evenly transmitted to the entire battery cell group 10 through the end plate 30, strengthening the constraint effect on the battery cell group 10 and improving the structural regularity and stability of the battery module 110 after assembly.

[0172] In addition, from the perspective of space saving, since the receiving groove 31 is opened at the end of the end plate 30 away from the battery cell pack 10, after the structure of the fastening member 22 is partially embedded in the groove, there is no need to reserve additional space for the installation and placement of the fastening member 22 in the second direction. This allows the fastening member 22 and the end plate 30 to form a compact integrated structure, effectively compressing the overall volume occupied by the battery module 110 in the second direction and making the structure of the battery module 110 more compact.

[0173] In summary, the receiving groove 31 and the fastening member 22 work together. While realizing the limiting and constraint function of the fastening member 22, the receiving groove 31 maximizes the use of the end plate 30's own space, taking into account both structural constraint performance and space utilization, and further optimizing the overall structural design rationality and assembly adaptability of the battery module 110.

[0174] refer to Figures 3 to 11The battery device 100 provided in the embodiments of this application includes a battery module 110, which includes a battery cell group 10 and a constraint component 20. The battery cell group 10 includes a plurality of stacked battery cells. The constraint component 20 includes a locking mechanism 21 and a fastening member 22. The locking mechanism 21 includes a body 211 and a locking unit 212 disposed on the body 211. The fastening member 22 surrounds the outer periphery of the battery cell group 10. The fastening member 22 has a first connecting portion 221 and a second connecting portion 222 at its two ends in the length direction. The first connecting portion 221 is fixedly connected to the body 211, and the second connecting portion 222 is connected to the locking unit 212. The second connecting portion 222 has a plurality of locking positions in the length direction. The plurality of locking positions can respectively cooperate with the locking unit 212 and be locked or unlocked by the locking unit 212, so that the fastening member 22 can fix the plurality of battery cells in an adjustable manner. In some embodiments, the body 211 is provided with a mounting hole 2111, and a conical surface 2111a is provided inside the mounting hole 2111; the locking unit 212 includes a locking member 2121b, which is movably disposed inside the mounting hole 2111; wherein, when the locking member 2121b is configured to press against the mounting hole 2111, the locking member 2121b can simultaneously abut against the conical surface 2111a and the second connecting portion 222 to lock the second connecting portion 222; when the locking member 2121b is configured to move in a direction away from the conical surface 2111a or the second connecting portion 222, the second connecting portion 222 can be unlocked. In some embodiments, the locking unit 212 further includes a carrier 2121a, which has a through hole 2121a1 through which the second connecting portion 222 passes. A limiting hole 2121a2 is formed in the wall of the hole in the carrier 2121a, and a locking member 2121b is movably disposed within the limiting hole 2121a2. The portion of the locking member 2121b within the through hole 2121a1 can contact the second connecting portion 222, while the portion outside the through hole 2121a1 can contact the conical surface 2111a. Further, the limiting hole 2121a2 is configured to allow the locking member 2121b to move radially along the through hole 2121a1, and to restrict the locking member 2121b from completely disengaging from the limiting hole 2121a2. Furthermore, the locking element 2121b is a sphere; the limiting hole 2121a2 is a variable diameter hole that is larger in the middle and smaller at both ends along the radial direction of the through hole 2121a1; wherein, the maximum diameter of the limiting hole 2121a2 is greater than the diameter of the sphere, and the minimum diameter of the limiting hole 2121a2 is smaller than the diameter of the sphere. Furthermore, there are multiple limiting holes 2121a2, and the multiple limiting holes 2121a2 are distributed circumferentially along the through hole 2121a1; wherein, each limiting hole 2121a2 is respectively equipped with a locking element 2121b.In some embodiments, the carrier 2121a and the locking member 2121b are assembled together to form the lock cylinder 2121. The locking unit 212 further includes an elastic member 2122, which provides elastic force and presses the lock cylinder 2121 into the mounting hole 2111, so that the locking member 2121b can simultaneously abut against the conical surface 2111a and the second connecting portion 222 to lock the second connecting portion 222. Further, the locking unit 212 also includes an unlocking member 2123, which overcomes the elastic force of the elastic member 2122 and drives the lock cylinder 2121 to move, thereby unlocking the second connecting portion 222. Furthermore, the mounting hole 2111 penetrates the body 211 along the first direction; the lock cylinder 2121 has a first end 2121c and a second end 2121d at its two ends in the first direction, and the direction from the first end 2121c to the second end 2121d is consistent with the direction from the small diameter end of the conical surface 2111a to its large diameter end; wherein, the unlocking member 2123 is disposed at the first end 2121c, and the elastic member 2122 is disposed at the second end 2121d. Further still, the end of the unlocking member 2123 away from the lock cylinder 2121 in the first direction protrudes from the body 211. Further still, the locking unit 212 also includes a blocking member 2124, which is connected to the body 211 and disposed at the end of the elastic member 2122 away from the lock cylinder 2121 along the first direction, so as to restrict the elastic member 2122 and the lock cylinder 2121 within the mounting hole 2111. Furthermore, the second connecting portion 222 is connected to the locking unit 212, enabling the fastening member 22 to form a ring. When the second connecting portion 222 passes through the lock cylinder 2121 in the direction from the first end 2121c to the second end 2121d, the ring tightens and shrinks; and when the second connecting portion 222 passes through the lock cylinder 2121 in the direction from the second end 2121d to the first end 2121c, the ring expands and enlarges. In some embodiments, the fastening member 22 is a flexible member, and the ultimate breaking tensile force of the fastening member 22 is 5kN to 30kN. Further, the fastening member 22 is a component made of flexible braided wire. In some embodiments, the fastening member 22 is a component made of multiple layer structures 223; wherein the multiple layer structures 223 are stacked along the thickness direction of any one layer structure 223; or, any two adjacent layer structures 223 are nested inside and outside each other. Further, the multiple layer structures 223 include a combination structure of rigid and flexible members. In some embodiments, the second connecting portion 222 is provided with a scale 225, and the body 211 is provided with a mark 2112 that is used in conjunction with the scale 225.In some embodiments, in the battery cell pack 10, a plurality of battery cells are stacked along a second direction; the battery module 110 further includes an end plate 30, which is disposed at the end of the battery cell pack 10 in the second direction to form a module component; a fastening member 22 surrounds the outer periphery of the module component; wherein, the end plate 30 is provided with a receiving groove 31 at one end in the second direction away from the battery cell pack 10, and a portion of the structure of the fastening member 22 can be placed into the receiving groove 31.

[0175] Secondly, embodiments of this application also provide an electrical device, including a battery device 100 provided in any of the embodiments of the first aspect, the battery device 100 being used to provide or store electrical energy.

[0176] In the above technical solution, the electrical equipment can achieve the same technical effect as the battery device 100 by adopting the battery device 100 in the first aspect.

[0177] Thirdly, embodiments of this application also provide an energy storage device, including a battery device 100 provided in any of the embodiments of the first aspect, the battery device 100 being used to provide or store electrical energy.

[0178] In the above technical solution, the energy storage device can achieve the same technical effect as the battery device 100 by adopting the battery device 100 in the first aspect.

[0179] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0180] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. This application is not limited to the specific embodiments applied herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Includes a battery module, the battery module comprising: A battery cell pack, comprising multiple stacked battery cells; and The restraint components include a locking mechanism and a fastening element; The locking mechanism includes a body and a locking unit disposed on the body; The fastening member surrounds the outer periphery of the battery cell assembly. The fastening member has a first connecting part and a second connecting part at both ends in the length direction. The first connecting part is fixedly connected to the body, and the second connecting part is connected to the locking unit. The second connecting part has multiple locking positions along its length. Each of the multiple locking positions can cooperate with the locking unit and be locked or unlocked by the locking unit, so that the fastening member can fix the multiple battery cells in an adjustable manner.

2. The battery device according to claim 1, characterized in that, The main body is provided with mounting holes, and a conical surface is provided inside the mounting holes; The locking unit includes: A locking element is movably disposed within the mounting hole; When the locking member is configured to press against the mounting hole, the locking member can simultaneously abut against the conical surface and the second connecting part to lock the second connecting part; When the locking element is configured to move in a direction away from the conical surface or the second connecting portion, the second connecting portion can be unlocked.

3. The battery device according to claim 2, characterized in that, The locking unit further includes: A carrier having a through hole through which the second connecting part can pass, and a limiting hole being formed on the wall of the hole in the carrier; The locking member is movably inserted through the limiting hole, the portion of the locking member inside the through hole can contact the second connecting part, and the portion of the locking member outside the through hole can contact the conical surface.

4. The battery device according to claim 3, characterized in that, The limiting hole is configured to allow the locking member to move radially along the through hole, and to prevent the locking member from completely disengaging from the limiting hole.

5. The battery device according to claim 4, characterized in that, The locking element is a sphere; The limiting hole is a variable diameter hole that is larger in the middle and smaller at both ends along the radial direction of the through hole; Wherein, the maximum diameter of the limiting hole is greater than the diameter of the sphere, and the minimum diameter of the limiting hole is less than the diameter of the sphere.

6. The battery device according to claim 4, characterized in that, The number of the limiting holes is multiple, and the multiple limiting holes are distributed along the circumference of the through hole; Each of the limiting holes is equipped with a locking element.

7. The battery device according to claim 3, characterized in that, The carrier and the lock component are assembled together to form the lock cylinder; The locking unit further includes: An elastic element is used to provide elastic force and press the lock cylinder into the mounting hole, so that the lock can simultaneously abut against the conical surface and the second connecting part to lock the second connecting part.

8. The battery device according to claim 7, characterized in that, The locking unit further includes: An unlocking element is used to overcome the elastic force of the elastic element and drive the lock cylinder to move, thereby unlocking the second connecting part.

9. The battery device according to claim 8, characterized in that, The mounting hole penetrates the body along a first direction; The lock cylinder has a first end and a second end at its two ends in the first direction, and the direction from the first end to the second end is consistent with the direction from the small diameter end of the conical surface to its large diameter end. The unlocking element is located at the first end, and the elastic element is located at the second end.

10. The battery device according to claim 9, characterized in that, The unlocking component protrudes from the body at the end furthest from the lock cylinder in the first direction.

11. The battery device according to claim 9, characterized in that, The locking unit further includes a blocking member, which is connected to the body and disposed at the end of the elastic member away from the lock cylinder along the first direction, so as to restrict the elastic member and the lock cylinder within the mounting hole.

12. The battery device according to claim 9, characterized in that, The second connecting part is connected to the locking unit, so that the fastening member can be formed into a ring; Specifically, when the second connecting portion passes through the lock cylinder in the direction from the first end to the second end, the ring body tightens and shrinks; and when the second connecting portion passes through the lock cylinder in the direction from the second end to the first end, the ring body expands and enlarges.

13. The battery device according to any one of claims 1-12, characterized in that, The fastening element is a flexible element, and the ultimate breaking tensile force of the fastening element is 5kN to 30kN.

14. The battery device according to claim 13, characterized in that, The fastening component is a component made of flexible woven wire.

15. The battery device according to any one of claims 1-12, characterized in that, The fastening component is a component made of a multi-layer structure; The plurality of layered structures are stacked along the thickness direction of any one of the layered structures; or, any two adjacent layered structures are nested inside and outside each other.

16. The battery device according to claim 15, characterized in that, The multiple layered structures include a combination of rigid and flexible components.

17. The battery device according to any one of claims 1-12, characterized in that, The second connecting part is provided with a scale, and the main body is provided with a mark that is used in conjunction with the scale.

18. The battery device according to any one of claims 1-12, characterized in that, In the battery cell group, the plurality of battery cells are stacked along the second direction; The battery module further includes an end plate, which is disposed at the end of the battery cell assembly in the second direction to form a module component; The fastening element is arranged around the outer periphery of the module component; The end plate has a receiving groove at the end away from the battery cell pack in the second direction, and part of the fastening member can be placed into the receiving groove.

19. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-18, the battery device being used to provide or store electrical energy.

20. An energy storage device, characterized in that, Includes a battery device as described in any one of claims 1-18, the battery device being used to provide or store electrical energy.

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