Battery device, electric device and energy storage device

Abstract

The application relates to the battery technical field and provides a battery device, a power utilization equipment and an energy storage equipment. The battery device comprises a box body, a battery monomer group, a beam component, a plate, a fastener and a cladding piece. The battery monomer group is arranged in the inner cavity of the box body, the beam component is arranged on the side of the battery monomer group, the plate is locked and fixed on the beam component through the connecting end of the fastener, and the exposed structure of the fastener is arranged on the outer side of the connecting end. The cladding piece is sleeved on the outer side of the connecting end of the plate, the cladding piece is provided with a one-side-open accommodating groove, the connecting end can be placed in the accommodating groove, and the exposed structure of the fastener is wrapped. The structure can accommodate and constrain the debris generated by the stress fracture of the plate and the fastener, limit the free scattering of the debris in the box body, reduce the contact of the debris with the internal electrical structure, effectively maintain the insulation performance and structural integrity of the battery, and stably improve the safety and reliability of long-term operation of the battery device.

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 structures typically incorporate beams located on the sides of individual battery cells. These beams accommodate the expansion and deformation caused by charging and discharging, dispersing expansion stress. They also serve as load-bearing structures, providing a mounting base for components such as plates. The plates are secured to the beams with fasteners. However, when the beams expand and deform outwards, the fasteners exert tension on the mounting holes of the plates, potentially causing tearing at the edges of the holes or breakage of the fasteners, resulting in debris. This debris falling into other parts of the battery casing can affect the safety and stability of the battery system, posing a safety hazard.

[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, electrical equipment, and energy storage device that can improve the safety problems caused by fragments from the sheet metal or fasteners falling into the battery housing.

[0006] In a first aspect, embodiments of this application provide a battery device, including a housing, a battery cell assembly, a beam member, a plate, fasteners, and a cover. The housing has an inner cavity; the battery cell assembly is disposed in the inner cavity, and the battery cell assembly includes a plurality of battery cells arranged along a first direction; the beam member is disposed on one side of the battery cell assembly in the first direction; the plate has a connecting end for connecting to the beam member; the fastener passes through the connecting end and is used to lock the connecting end onto the beam member, the fastener including an exposed structure disposed on the side of the connecting end opposite to the beam member; the cover is sleeved on the outside of the connecting end; wherein the cover has a receiving groove with an opening on one side, allowing the connecting end to be inserted into the receiving groove through the opening, and at least a portion of the exposed structure is covered within the receiving groove.

[0007] In the aforementioned technical solution, when the beam component deforms due to the expansion of the battery cells during charging and discharging, it easily generates tensile stress on the connection ends of the plate and the fasteners. Under long-term operating conditions, this can easily cause tearing of the plate connection ends, damage to the fastener structure, and the generation of debris. To address this, this solution uses a covering to encase the outside of the plate connection ends. The covering's single-sided opening and receiving groove enclose and limit the exposed structure of the connection ends and fasteners. This allows debris generated by plate tearing and fastener breakage to be contained and restrained within the receiving groove, effectively limiting the free displacement of debris and reducing the possibility of debris scattering into the electrical structure areas inside the battery box. This maintains the cleanliness of the internal structure and electrical insulation performance of the battery box, ensuring the long-term stability and safety of the battery device.

[0008] In some embodiments, the cover includes a detachably connected body and a cover, the body and cover enclosing and defining a receiving groove.

[0009] In the above technical solution, the covering is formed by the detachable assembly of the main body and the cover to form a receiving groove. During assembly, it can be installed in steps. Later, the main body and the cover can be separated to open the receiving groove, which is convenient for observing the condition of the connection parts, handling the debris in the groove, and inspecting and replacing parts. The assembly and maintenance operations are more convenient.

[0010] In some embodiments, the main body includes a bottom wall and four circumferentially connected side walls. The cavity enclosed by the four side walls has two oppositely arranged ports, one of which is an opening and the other is covered by the bottom wall. The four side walls include a first side wall and a second side wall that are oppositely arranged. The first side wall is sandwiched between the connecting end and the beam member and has a through hole for fasteners to pass through. The second side wall is located on the side of the connecting end away from the beam member and has a clearance opening to expose the exposed structure. A cover is disposed on the second side wall and covers the clearance opening.

[0011] In the above technical solution, the main body is a cavity formed by a bottom wall and four side walls, which is closed at one end and open at the other. A through hole is provided in the first side wall, which is sandwiched between the connecting end and the beam component, allowing fasteners to pass through and lock in place. A clearance opening is provided on the second side wall outside the connecting end, allowing the exposed structure of the fasteners to be exposed. A cover mounted on the second side wall can conceal the clearance opening. This structure is compatible with the existing fastener assembly process. The cavity can collect debris generated at the connection point, and the cover, together with the cavity, forms an enclosed space to constrain the debris, making overall alignment and assembly more convenient.

[0012] In some embodiments, the exposed structure has a clearance opening and protrudes from the body; the cover has a groove to accommodate the portion of the exposed structure protruding from the body.

[0013] In the above technical solution, the exposed structure extends out of the main body through the clearance opening, and the groove set in the cover can accommodate the protruding part. During assembly, it will not interfere with the fasteners, improve the fit of the cover, and also help to confine the debris generated inside the enclosed space.

[0014] In some embodiments, the cover further includes a folding portion; the folding portion is configured to connect the body and the cover and to guide the cover to fold over and cover the clearance opening.

[0015] In the above technical solution, the folding part connects the main body and the cover as one unit, which can guide the cover to flip over to cover the opening and simplify the assembly steps, and also keep the two connected, reducing the probability of the cover being lost or scattered, and making the opening and closing operation smoother.

[0016] In some embodiments, the folding part is a folding plate, which has a first edge and a second edge disposed opposite to each other; the first edge is movably connected to the side of the bottom wall near the first side wall, so that the folding plate can be folded along the first edge and fit against the side of the bottom wall away from the cavity; the second edge is movably connected to the side of the cover near the bottom wall, so that the cover can be folded along the second edge and fit against the side of the second side wall away from the cavity, covering the clearance opening.

[0017] In the above technical solution, the two ends of the folding plate are connected to the bottom wall and the cover respectively. The folding plate can be folded along the first edge and attached to the outside of the bottom wall, and the cover can be flipped along the second edge and attached to the outside of the second side wall to block the clearance opening. The two-stage folding action is arranged in an orderly manner, making the opening, closing, assembly and maintenance operations more convenient.

[0018] In some embodiments, the four sidewalls further include a third sidewall and a fourth sidewall disposed opposite to each other; a first mating part is provided on the opposite side of the third sidewall and the fourth sidewall; a second mating part is provided on the cover; wherein, one of the first mating part and the second mating part is a buckle and the other is a slot, and the buckle is detachably snapped into the slot.

[0019] In the above technical solution, the first mating part on the outer side of the third and fourth side walls and the second mating part on the cover are detachably connected by buckles and slots, which can improve the fit of the cover after it is closed, make disassembly and assembly convenient, and facilitate the inspection of the internal situation and the handling of internal debris.

[0020] In some embodiments, the battery device further includes a pad; when there is one pad, the pad is disposed between the first sidewall and the connection end or between the second sidewall and the connection end; when there are multiple pads, the multiple pads are disposed between the first sidewall and the connection end and / or between the second sidewall and the connection end.

[0021] In the above technical solution, one or more pads can be selected as needed and arranged at the corresponding gaps to adapt to assembly tolerances, adjust the installation position of the covering parts, and the pads can also provide support for the connection end of the plate, improve the structural strength of the part, and optimize the assembly compatibility.

[0022] In some embodiments, the cover further includes a connecting structure configured to connect the body and the cover.

[0023] In the above technical solution, the connecting structure establishes a corresponding relationship between the main body and the cover, so that the two components form a matching whole, which facilitates the opening and closing of the cover and also maintains the matching relationship between the two, making it convenient for the whole to be disassembled and used.

[0024] In some embodiments, the sheet material and / or fasteners are conductive; the covering is an insulating component.

[0025] In the above technical solution, the plates and fasteners are usually conductive parts with insulating varnish. The failure of the insulating varnish is likely to occur at the fracture site and in the debris generated. The insulating material covering the outside of the connection can isolate and constrain the failed part and debris, reduce the possibility of electrical abnormalities, and improve the overall insulation safety.

[0026] In some embodiments, the exposed structure includes a clamping part and an operating end connected together; the clamping part abuts against the side of the connecting end away from the beam member; the operating end is disposed on the side of the clamping part away from the connecting end.

[0027] In the above technical solution, the exposed structure consists of a connected clamping part and an operating end. The clamping part abuts against the outside of the connecting end and can form a clamping limit on the connecting end of the plate. The operating end is located on the outside, which makes it convenient for the operator to apply force to tighten and complete the fastener locking operation. The structural layout takes into account both locking positioning and operation convenience.

[0028] In some embodiments, the fastener further includes a connecting portion; the connecting portion is disposed on the side of the clamping portion opposite to the operating end; the connecting portion passes through the connecting end and is fixedly connected to the beam member, so as to cooperate with the clamping portion to lock the connecting end onto the beam member.

[0029] In the above technical solution, the connecting part of the fastener passes through the connecting end and is fixed to the beam component. Together with the clamping part, it clamps the connecting end of the positioning plate, so that the connecting end is stably assembled on the beam component. The overall stress structure is stable, which can improve the assembly firmness of the plate connection.

[0030] 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.

[0031] 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

[0032] 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.

[0033] 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 schematic diagram of the assembly of plate, beam members, fasteners and coverings according to some embodiments of this application (the coverings are in the open state). Figure 4 This is an exploded structural diagram of the assembly of plate, beam members, fasteners and cladding parts according to some embodiments of this application; Figure 5 This is a three-dimensional structural diagram of the cover in the open state according to some embodiments of this application; Figure 6 This is a top view of the structure of the cover in the open state according to some embodiments of this application; Figure 7 This is a schematic diagram of the left-side structure of the cover in the open state according to some embodiments of this application; Figure 8 This is a schematic diagram of the main structure of the cover in a closed state according to some embodiments of this application; Figure 9 This is a three-dimensional structural schematic diagram of a fastener provided according to some embodiments of this application; Figure 10 This is a structural schematic diagram of fasteners passing through plates and coverings and connecting to beam members according to some embodiments of this application.

[0034] The attached figures are labeled as follows: 1000 - Vehicles; 100 - Battery unit, 200 - Controller, 300 - Motor; 10-cell battery pack; 20 - Box body, 21 - Lid structure, 22 - Main box body; 30 - Beam component; 31 - Rivet nut; 40 - Plate material, 41 - Connecting end; 50-Fastener, 51-Exposed structure, 511-Clamping part, 512-Operating end, 52-Connecting part; 60-Covering part, 61-Receiving groove, 62-Opening, 63-Main body, 631-Bottom wall, 632-First side wall, 6321-Through hole, 633-Second side wall, 6331-Allowing opening, 634-Third side wall, 635-Fourth side wall, 636-Slot, 64-Cover body, 641-Groove, 642-Snap fastener, 65-Folding part; 70-Place block. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly specified.

[0046] 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.

[0047] 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.

[0048] Traditional battery structures typically incorporate beam components located on the sides of individual battery cells. These beams serve two purposes: firstly, they accommodate the periodic expansion and contraction deformation of individual cells during repeated charging and discharging, evenly distributing the compressive stress caused by cell expansion and alleviating localized stress concentration; secondly, they act as load-bearing substrates, providing reliable mounting references and positioning surfaces for external components such as sheet metal. The sheet metal is generally secured to the pre-set mounting positions on the beams using fasteners, enabling the integrated assembly of various structural components.

[0049] However, this assembly method has obvious drawbacks: During long-term cyclic operation, the continuous expansion of individual battery cells will cause the beam components to deform outwards. The tensile force generated by the deformation of the beam components will be continuously transmitted to the locking holes of the plate through the fasteners. The edges of the holes are subjected to alternating tensile stress for a long time, which can easily lead to cracking and tearing of the plate edges. Under extreme conditions, it can even cause tensile fracture of the fasteners, resulting in debris after structural damage. At the same time, if the battery device is continuously exposed to harsh conditions such as vibration, debris can easily detach from the plate or fasteners and scatter around various electrical components inside the battery device. Once this debris falls into the battery box, especially if it is conductive metal debris, it can easily cause insulation degradation, local short circuits, and other equipment insulation withstand voltage failures, which can adversely affect the long-term safety and structural stability of the entire battery device and pose a continuous safety hazard.

[0050] To address the aforementioned issues, embodiments of this application provide a battery device comprising a housing, a battery cell assembly, a beam member, a plate, fasteners, and a cover. The housing has an inner cavity; the battery cell assembly is disposed within the inner cavity, comprising a plurality of battery cells arranged along a first direction; the beam member is disposed on one side of the battery cell assembly in the first direction; the plate has a connecting end for connecting to the beam member; the fastener passes through the connecting end and is used to lock the connecting end onto the beam member, the fastener including an exposed structure disposed on the side of the connecting end facing away from the beam member; the cover is sleeved on the outside of the connecting end; wherein the cover has a receiving groove with an opening on one side, allowing the connecting end to be inserted into the receiving groove through the opening, and at least a portion of the exposed structure is covered within the receiving groove.

[0051] The beneficial effects of the battery device in the above scheme are as follows: by covering the outside of the connecting end of the plate, the accommodating groove with one side opening of the covering forms a wrapping and limiting effect on the exposed structure of the connecting end and fasteners, so that the debris generated by the tearing of the plate and the debris generated by the breakage of the fasteners can be collected and constrained inside the accommodating groove, effectively limiting the free displacement of the debris, reducing the possibility of debris falling into the electrical structure areas inside the battery box, maintaining the cleanliness of the internal structure and electrical insulation performance of the battery box, and ensuring the long-term stability and safety of the battery device.

[0052] 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.

[0053] For ease of description, this application uses the application of a battery device in a vehicle as an example for illustration.

[0054] refer to Figure 1 , Figure 1 This 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.

[0055] 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.

[0056] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this application. The battery device 100 includes a battery cell pack 10 and a housing 20. The housing 20 has a receiving cavity, in which the battery cell pack 10 is received.

[0057] In some embodiments, the battery device 100 may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0058] In some embodiments, the battery cell pack 10 is typically formed by arranging multiple battery cells. As an example, the battery cell group 10 can be a battery module, which consists of multiple battery cells arranged and fixed to form an independent module.

[0059] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0060] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 20 and one or more battery cell groups 10, the battery cell groups 10 being housed in the housing 20.

[0061] As an example, the battery cell pack 10 can be a battery module, and the battery cell pack 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0062] As an example, the battery cell pack 10 can also be housed in the housing 20 by directly fixing multiple battery cells to the housing 20.

[0063] 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.

[0064] 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.

[0065] As an example, the battery cell can be a prismatic battery cell or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not limit this.

[0066] In some embodiments, the housing 20 may include a first housing portion and a second housing portion. The first housing portion and the second housing portion are fastened together to form a closed space inside the housing 20 for housing the battery cell pack 10. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0067] As an example, the housing 20 may include a top cover, a frame, and a bottom plate. The frame may be formed by multiple side panels, and the top cover and bottom plate are respectively connected to the frame, so that the interior of the housing 20 forms a closed space to accommodate the battery cell pack 10. The first housing section may be a cover structure 21, which may be a top cover or a bottom plate; correspondingly, the second housing section may be a main housing 22, which may be composed of a bottom plate and a frame or a top cover and a frame.

[0068] In some embodiments, the housing 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0069] 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.

[0070] refer to Figures 2 to 4 , Figure 3 This is a schematic diagram of the assembly of plate, beam members, fasteners and coverings according to some embodiments of this application (the coverings are in the open state). Figure 4 This is an exploded structural diagram of the assembly of plate, beam members, fasteners and coverings according to some embodiments of this application.

[0071] Firstly, such as Figures 2 to 4As shown, an embodiment of this application provides a battery device 100, including a housing 20, a battery cell pack 10, a beam member 30, a plate 40, fasteners 50, and a covering member 60. The housing 20 has an inner cavity; a battery cell group 10 is disposed in the inner cavity, the battery cell group 10 including a plurality of battery cells arranged along a first direction; a beam member 30 is disposed on one side of the battery cell group 10 in the first direction; a plate 40 has a connecting end 41 for connecting with the beam member 30; a fastener 50 passes through the connecting end 41 and is used to lock the connecting end 41 onto the beam member 30, the fastener 50 including an exposed structure 51 disposed on the side of the connecting end 41 away from the beam member 30; a cover 60 is sleeved on the outside of the connecting end 41; wherein the cover 60 is provided with a receiving groove 61 with an opening 62 on one side, so that the connecting end 41 can be inserted into the receiving groove 61 through the opening 62, and at least a portion of the exposed structure 51 is covered within the receiving groove 61.

[0072] In this embodiment, as Figure 2 As shown, the battery cell group 10 may include multiple battery cells arranged along a first direction. Each battery cell may be prismatic and may include a housing and an electrode assembly, with the electrode assembly disposed within the housing. The housing may be formed by multiple walls, with the wall having the largest area being the large surface of the battery cell. Along the first direction, the large surfaces of adjacent battery cells in the battery cell array abut against each other.

[0073] It is understandable that during the charging and discharging process, the main expansion force generated by the battery cell is transmitted in the direction of large-area stacking (first direction). By placing the beam member 30 in the side area of ​​the battery cell group 10 in the first direction, the beam member 30 can adapt to the expansion and contraction deformation generated by the battery cell group 10 during the charging and discharging cycle, disperse the stress generated by the expansion of the battery cell group 10, alleviate the local stress concentration of the battery cell group 10, and reduce the impact of expansion on battery performance and safety.

[0074] In this embodiment, the beam member 30 mainly has two functions: First, the beam member 30 can be used as an expansion beam, which can adapt to the periodic expansion and contraction deformation generated by the battery cell pack 10 during repeated charging and discharging, evenly distribute the compressive force caused by the expansion of the battery cell pack 10, and alleviate the problem of local stress concentration; Second, the beam member 30 can be used as a load-bearing base, providing a stable installation positioning reference and load-bearing support for components such as the plate 40 and fasteners 50.

[0075] Optionally, such as Figure 2 As shown, the beam member 30 is roughly a long strip plate structure, and its plate surface can be attached to the side of the battery cell pack 10.

[0076] For example, one assembly method for the beam member 30 may be: as follows Figure 2 As shown, the beam member 30 is fixedly connected to the side plates of the box body 20 at both ends in its extension direction, and its bottom is attached to the bottom plate of the box body 20 to form a rigid support structure, which can make its overall stability stronger.

[0077] For example, another assembly method for the beam member 30 can be: the beam member 30 is only fitted and arranged in a predetermined area inside the cavity of the box body 20, without rigid fixed connection to the side plate or bottom plate of the box body 20, and can adaptively shift slightly with the deformation of the battery cells, further adapting to the expansion and contraction conditions of the battery cells, thus achieving better adaptability. In this assembly method, the beam member 30 can also be fixed to the battery cell group 10 by binding with cable ties.

[0078] It should be noted that when there is only one beam member 30, "beam member 30 is located on one side of the battery cell pack 10 in the first direction" can mean that the beam member 30 can be located on either side of the battery cell pack 10 in the first direction. When there are multiple beam members 30, "beam member 30 is located on one side of the battery cell pack 10 in the first direction" can mean that multiple beam members 30 can be respectively located on both sides of the battery cell pack 10 in the first direction (e.g., ...). Figure 2 (as shown), or multiple beam members 30 can all be arranged on either side of the battery cell group 10 in the first direction.

[0079] In this embodiment, the plate 40 is a component installed in the inner cavity of the box 20 with the beam component 30 as the load-bearing base. It can be a heat exchange component, a structural reinforcement component, etc.

[0080] For example, the plate 40 can be a cold plate, with a flow channel inside the cold plate through which a heat exchange medium flows, and can be used for heat exchange with the battery cell assembly 10. The plate 40, as a cold plate, can be arranged on the side of the battery cell assembly 10 facing the top cover of the housing 20 or on the side of the battery cell assembly 10 facing the bottom plate of the housing 20.

[0081] Alternatively, the cold-rolled plate can be made of aluminum sheet.

[0082] For example, the plate 40 can also be a support plate, which can be used to strengthen the structural strength of the housing 20. The plate 40, as a support plate, can be connected between the beam member 30 and the side plate of the housing 20, or it can be connected between two beam members 30 disposed on both sides of the battery cell pack 10 along the first direction (e.g., Figure 2 (As shown) or it can be connected between the beam member 30 and other members built into the box 20.

[0083] Alternatively, the support plate can be a strip plate.

[0084] Optionally, the support plate can be a reinforced plate with higher thickness and cross-sectional strength, which can improve the support plate's resistance to deformation and thus improve the structural strength of the box 20.

[0085] Of course, the plate 40 can also be a component with other functions, and this application embodiment does not limit this.

[0086] It is understandable that, such as Figure 4 As shown, the plate 40 has a connecting end 41, which is part of the plate 40. The connecting end 41 is used to connect with the beam member 30, so that the plate 40 can be connected to the beam member 30 as a whole.

[0087] Optionally, the connecting end 41 can be a plate-like structure extending from the edge of the plate 40 mother body, and can be stacked on the beam member 30. For example, the connecting end 41 of the plate 40 can be attached to the end face of the beam member 30 facing the top of the box 20 or to the end face of the beam member 30 facing the bottom plate of the box 20.

[0088] One way to define the connection end 41 is as follows: taking the arrangement direction of the overlapping connection ends 41 and the beam member 30 as the second direction, the structure in which the plate 40 overlaps with the beam member 30 in the second direction can be defined as the connection end 41. An opening is provided in the area where the connection end 41 is located, so that the fastener 50 can pass through the connection end 41.

[0089] Optionally, the elastic modulus of the plate 40 is greater than that of the beam member 30.

[0090] It should be noted that the elastic modulus of plate 40 is greater than that of beam member 30, meaning that under the same tensile / compressive force, beam member 30 is more prone to deformation, while plate 40 is less likely to be stretched. It is important to note that the elastic modulus characterizes a material's ability to resist elastic deformation; the higher the value, the less easily the material can be stretched or bent. In this design, plate 40 has higher material stiffness and stronger resistance to tensile deformation, while beam member 30 is relatively more flexible and more prone to deformation.

[0091] Specifically, when the battery cell pack 10 expands during charging and discharging, pushing the beam component 30 to expand outward, the deformation is transmitted to the locking hole of the plate 40 through the fastener 50. Since the plate 40 is not easy to stretch and extend synchronously with the beam, the edge of the locking hole will continuously bear concentrated tensile stress, and the edge of the hole is prone to tearing after long-term cycling.

[0092] In this embodiment, the fastener 50 serves as a locking mechanism that locks the connecting end 41 of the plate 40 to the beam member 30. Its primary function is to achieve alignment and fixation between the plate 40 and the expansion beam, and to constrain the plate 40 from shifting or loosening relative to the beam member 30 under normal vibration and other working conditions. When the expansion of the battery cell pack 10 causes the beam member 30 to expand outward, the fastener 50 can transmit the displacement tension of the beam member 30 and transfer the deformation load to the locking hole of the plate 40, thereby achieving stress transmission.

[0093] Optionally, such as Figure 3 and Figure 4 As shown, the fastener 50 can be inserted into the connecting end 41 of the plate 40 and the beam member 30 along the second direction to lock them together.

[0094] Optionally, there may be multiple fasteners 50, which can jointly lock the connection end 41 and the beam member 30.

[0095] It is understood that the exposed structure 51 is part of the structure of the fastener 50. The structure of the fastener 50 that extends beyond the connection end 41 and faces away from the beam member 30 can be defined as the exposed structure 51. When there are multiple fasteners 50, each fastener 50 can be provided with one exposed structure 51.

[0096] It should be noted that due to the continuous tensile stress caused by the expansion of the battery cell pack 10, the fastener 50 is at risk of breakage under long-term alternating loads. After the fastener 50 breaks, its exposed structure 51 lacks effective restraint and is prone to falling off and scattering inside the battery box 20, which will adversely affect the insulation status of the electrical components inside the box.

[0097] In this embodiment, as Figures 2 to 4 As shown, the covering 60 is sleeved on the outside of the connecting end 41 of the plate 40. The connecting end 41 and the exposed structure 51 of the fastener 50 are wrapped by the receiving groove 61 with a single-sided opening. When the beam member 30 is deformed and pulled, causing the hole edge of the plate 40 to tear, or the fastener 50 is broken due to tension, the generated debris can be constrained and collected inside the receiving groove 61, reducing the probability of debris falling freely inside the battery box 20.

[0098] Optionally, the cover 60 can be a one-piece structure or a separate structure.

[0099] In the above technical solution, the elastic modulus of the plate 40 is greater than that of the beam member 30. When the beam member 30 deforms due to the expansion of the battery cell pack 10 during charging and discharging, it is easy to generate tensile stress on the connecting end 41 of the plate 40 and the fastener 50. Under long-term working conditions, this can easily cause the connecting end 41 of the plate 40 to tear, the fastener 50 to break and generate debris. To this end, this solution uses a covering 60 to cover the outside of the connecting end 41 of the plate 40. The receiving groove 61 with one side opening of the covering 60 forms a wrapping and limiting effect on the exposed structure 51 of the connecting end 41 and the fastener 50. This allows the debris generated by the tearing of the plate 40 and the debris generated by the breakage of the fastener 50 to be collected and constrained inside the receiving groove 61, effectively limiting the free displacement of the debris and reducing the possibility of debris scattering into the electrical structure areas inside the battery box 20. This can maintain the cleanliness of the internal structure and electrical insulation performance of the battery box 20, and ensure the long-term stability and safety of the battery device 100.

[0100] refer to Figures 5 to 8 , Figure 5 This is a three-dimensional structural diagram of the cover in the open state according to some embodiments of this application; Figure 6 This is a top view of the structure of the cover in the open state according to some embodiments of this application; Figure 7 This is a schematic diagram of the left-side structure of the cover in the open state according to some embodiments of this application; Figure 8 This is a front view structural diagram of the cover in a closed state according to some embodiments of this application.

[0101] In some embodiments, such as Figure 5 and Figure 8 As shown, the cover 60 includes a detachably connected body 63 and a cover 64, with the body 63 and the cover 64 enclosing and defining a receiving groove 61.

[0102] Alternatively, the detachable connection between the main body 63 and the cover 64 can be a snap-fit ​​connection, a plug-in connection, a bolt assembly locking connection, a magnetic connection, etc.

[0103] It should be noted that the covering part 60 adopts a split structure, which is set as a main body 63 and a cover 64 that can be disassembled and assembled. After the two are assembled, they can be together to form a complete receiving groove 61. During the assembly stage, the main body 63 can be aligned and placed on the outside of the connecting end 41 of the plate 40 and the exposed structure 51 of the fastener 50, and then the cover 64 can be assembled to complete the enclosure of the receiving groove 61, which can be adapted to on-site assembly operations.

[0104] Meanwhile, when it is necessary to inspect the stress deformation of the connecting end 41, clean the accumulated debris in the groove, or replace related parts, the cover 64 and the main body 63 can be separated to easily open the receiving groove 61 to carry out corresponding maintenance work. Compared with the integrated closed covering structure, it has better adaptability in terms of assembly convenience and later maintenance operability.

[0105] Furthermore, such as Figures 5 to 8 As shown, the main body 63 includes a bottom wall 631 and four circumferentially connected side walls. The cavity enclosed by the four side walls has two oppositely arranged ports, one of which is an opening 62, and the other port is covered by the bottom wall 631. The four side walls include a first side wall 632 and a second side wall 633 oppositely arranged. The first side wall 632 is sandwiched between the connecting end 41 and the beam member 30. A through hole 6321 is provided on the first side wall 632 for fasteners 50 to pass through. The second side wall 633 is located on the side of the connecting end 41 away from the beam member 30. An opening 6331 is provided on the second side wall 633 to expose the exposed structure 51. The cover 64 is provided on the second side wall 633 and covers the opening 6331.

[0106] Alternatively, the bottom wall 631 and the four side walls can be made as a single piece.

[0107] For example, a specific assembly method between the plate 40, the covering 60 and the beam member 30 may be: the first sidewall 632 and the second sidewall 633 are arranged opposite each other along the second direction, the clearance opening 6331 on the second sidewall 633, the opening on the connecting end 41 and the through hole 6321 on the first sidewall 632 can be connected sequentially along the second direction, and the fastener 50 can be connected to the beam member 30 through the clearance opening 6331, the opening and the through hole 6321.

[0108] It should be noted that the specific construction of the second sidewall 633 includes at least the following situations: 1) The second sidewall 633 can be an end face structure; the two sidewalls other than the first sidewall 632 and the second sidewall 633 among the four sidewalls are the third sidewall 634 and the fourth sidewall 635 mentioned below. The end face of at least one of the third sidewall 634, the fourth sidewall 635 and the bottom wall 631 facing away from the first sidewall 632 can constitute the second sidewall 633; ​​specifically, the end face of the third sidewall 634 facing away from the first sidewall 632 is the first end face, the end face of the fourth sidewall 635 facing away from the first sidewall 632 is the second end face, and the end face of the bottom wall 631 facing away from the first sidewall 632 is the third end face. At least one of the first end face, the second end face and the third end face can be used as the second sidewall 633.

[0109] 2) The second sidewall 633 may be a flange structure; the third sidewall 634 has a first flange on the side away from the first sidewall 632, the fourth sidewall 635 has a second flange on the side away from the first sidewall 632, and the bottom wall 631 has a third flange on the side away from the first sidewall 632; at least one of the first flange, the second flange and the third flange may be used as the second sidewall 633.

[0110] 3) The second sidewall 633 may be a plate structure with a clearance opening 6331; the plate structure may be connected to at least one of the first end face, the second end face and the third end face, or the plate structure may be enclosed between the third sidewall 634, the fourth sidewall 635 and the bottom wall 631.

[0111] It is understandable that when the cover 64 covers the clearance opening 6331 on the second side wall 633, the cover 64 and the main body 63 are combined and can jointly define the receiving groove 61; at the same time, at least a portion of the connecting plate and the exposed structure 51 can be covered within the receiving groove 61. The covering of at least a portion of the exposed structure 51 within the receiving groove 61 can include two situations: first, when the cover 64 and the main body 63 are combined, the entire exposed structure 51 is within the receiving groove 61; second, when the cover 64 and the main body 63 are combined, a portion of the exposed structure 51 is confined within the receiving groove 61, while other portions of the structure, being connected to the structure confined within the receiving groove 61, are also constrained by the receiving groove 61, thus forming a wrapping and limiting effect on the entire exposed structure 51 of the fastener 50.

[0112] It should be noted that the main body 63 is a cavity structure formed by the bottom wall 631 and four side walls, which is closed at one end and open at the other end 62. The first side wall 632 is sandwiched between the connecting end 41 of the plate 40 and the beam member 30. The fastener 50 can be properly installed and locked through the through hole 6321 on it. The second side wall 633 is located outside the connecting end 41 and has a clearance opening 6331, which can leave space to expose the exposed structure 51 of the fastener 50. The cover 64 is assembled at the second side wall 633 to cover the clearance opening 6331. The overall structure can be adapted to the original locking and assembly path without interfering with the normal installation and fixing of the fastener 50. The cavity space can also receive the debris generated at the connection position. The cover 64, together with the side walls, forms a closed space, which can constrain the debris. At the same time, the layered layout structure has clear positioning and is more convenient for assembly and alignment.

[0113] Furthermore, such as Figure 3 and Figure 5 As shown, the exposed structure 51 has a clearance opening 6331 and protrudes from the main body 63; the cover 64 has a groove 641 to accommodate the part of the exposed structure 51 that protrudes from the main body 63.

[0114] Alternatively, the internal contour of the groove 641 is substantially the same as the exposed structure 51 of the fastener 50.

[0115] Optionally, the number of grooves 641 is the same as the number of exposed structures 51, and the two are matched one-to-one.

[0116] It should be noted that the exposed structure 51 of the fastener 50 passes through the relief opening 6331 and extends out of the main body 63. The cover 64 is provided with a corresponding groove 641 to accommodate the protruding section. This will not cause squeezing interference to the fastener 50, ensuring that the covering part 60 can be smoothly assembled. The groove 641 can be adapted to the shape of the exposed structure 51 to achieve alignment and fit, improving the fit and overall regularity of the cover 64 after assembly. At the same time, it can further improve the airtightness of the enclosed space and play a better role in restraining the debris generated in the cavity.

[0117] Furthermore, such as Figures 5 to 7 As shown, the cover 60 also includes a folding portion 65; the folding portion 65 is configured to connect the main body 63 and the cover 64, and can guide the cover 64 to fold over and cover the clearance opening 6331.

[0118] It should be noted that the folding part 65 connects the main body 63 and the cover 64, forming an integrated structure. The bending and guiding action of the folding part 65 can drive the cover 64 to flip and align, covering the clearance opening 6331. This eliminates the need for separate alignment and assembly of the cover 64, simplifying the assembly operation. It also maintains the connection between the cover 64 and the main body 63, reducing the possibility of the cover 64 falling off. The disassembly and assembly process is also more coherent and smooth.

[0119] Furthermore, such as Figures 5 to 7 As shown, the folding part 65 is a folding plate, which has a first edge and a second edge that are disposed opposite to each other. The first edge is movably connected to the side of the bottom wall 631 near the first side wall 632, so that the folding plate can be folded along the first edge and fit against the side of the bottom wall 631 away from the cavity. The second edge is movably connected to the side of the cover 64 near the bottom wall 631, so that the cover 64 can be folded along the second edge and fit against the side of the second side wall 633 away from the cavity, covering the clearance opening 6331.

[0120] Optionally, the shape and outer contour of the folding plate are substantially the same as the bottom wall 631 of the main body 63.

[0121] Optionally, when the cover 64 is combined with the main body 63, the first edge and the second edge can be arranged opposite each other in a second direction.

[0122] For example, the movable connection between the first edge and the bottom wall 631 and the movable connection between the second edge and the cover 64 can be a hinge. A specific structural form of the hinge can be: taking the movable connection between the first edge and the bottom wall 631 as an example, the first edge and the bottom wall 631 adopt an integral thin-walled hinge connection structure. The two are connected as one piece on the side by a continuous thin connecting rib. The connecting rib has the ability to bend and deform, so that the cover can rotate and fold relative to the main body 63 around the hinge axis to realize opening and closing. The whole is an integral foldable assembly structure.

[0123] It should be noted that the two ends of the folding plate are respectively connected to the bottom wall 631 and the cover 64 through the first edge and the second edge. The folding plate can be folded along the first edge and stored on the outside of the bottom wall 631. The cover 64 can be flipped along the second edge and attached to the outside of the second side wall 633 and block the clearance opening 6331. The two-stage folding structure is well-organized, and the opening and closing actions are orderly and step-by-step. The assembly and opening and closing operations are smoother and it is also convenient for the disassembly and maintenance of the covering part 60.

[0124] Furthermore, such as Figures 5 to 8 As shown, the four side walls also include a third side wall 634 and a fourth side wall 635 arranged opposite to each other; a first mating part is provided on the opposite sides of the third side wall 634 and the fourth side wall 635; a second mating part is provided on the cover 64; wherein, one of the first mating part and the second mating part is a buckle 642 and the other is a slot 636, and the buckle 642 can be detachably snapped into the slot 636.

[0125] For example, one form of mating between the first and second mating parts is as follows: the third sidewall 634 and the fourth sidewall 635 are arranged opposite each other along a third direction, which is perpendicular to the first and second directions respectively; the first mating part is configured as a slot 636, which extends through both ends along the second direction to form a groove structure; the second mating part is configured as a buckle 642 extending along the second direction. When the cover 64 and the body 63 are assembled together, the buckle 642 can slide into the slot 636 through the groove, and the slot 636 forms a limiting constraint on the buckle 642, thereby completing the locking and positioning between the cover 64 and the body 63.

[0126] Optionally, the number of clips 642 and the number of slots 636 are the same, and they correspond one-to-one.

[0127] It should be noted that the third sidewall 634 and the fourth sidewall 635 are provided with a first mating part on their outer sides, and the cover 64 is provided with a corresponding second mating part. The two adopt a detachable structure in which the buckle 642 and the slot 636 are matched and engaged. After the cover 64 is flipped into place, the buckle 642 and the slot 636 can be engaged and locked to improve the fit stability of the cover 64 after it is closed. When disassembling and assembling, the cover 64 can be opened simply by releasing the engagement constraint, which makes it convenient to check the internal status and deal with the debris generated in the cavity.

[0128] In some embodiments, such as Figure 4 As shown, the battery device 100 also includes a pad 70; when there is one pad 70, the pad 70 is disposed between the first side wall 632 and the connecting end 41 or between the second side wall 633 and the connecting end 41; when there are multiple pads 70, multiple pads 70 are disposed between the first side wall 632 and the connecting end 41 and / or between the second side wall 633 and the connecting end 41.

[0129] Optionally, the pad 70 can be a plate-like structure, and the outer periphery of the pad 70 can be consistent with the outer periphery of the connecting end 41 of the plate 40.

[0130] It should be noted that one or more pads 70 can be selected according to the assembly gap requirements and flexibly arranged at one or two locations between the first side wall 632 and the connecting end 41, and between the second side wall 633 and the connecting end 41. The thickness of the pads 70 can be adapted to different assembly gaps, and the installation position of the covering part 60 can be finely adjusted. At the same time, the pads 70 can provide support for the connecting end 41 of the plate 40, which helps to improve the structural strength of the connecting end 41 itself and improve the overall assembly matching degree.

[0131] In some embodiments, the cover 60 further includes a connection structure configured to connect the body 63 and the cover 64.

[0132] For example, the connecting structure can be the folding part 65 in the above embodiments. It should be understood that the connecting structure may only have the function of connecting the main body 63 and the cover 64 in the folding part 65, and does not need to have the bending guide function of the folding part 65 to drive the cover 64 to flip and align and cover the avoidance opening 6331.

[0133] It should be noted that the connecting structure establishes a corresponding relationship between the main body 63 and the cover 64, making the two parts a complete set. This facilitates the alignment and opening of the cover 64, maintains the matching relationship between the two, and makes it convenient for the whole set to be disassembled and used.

[0134] In some embodiments, the plate 40 and / or fastener 50 are conductive elements; the cover 60 is an insulating element.

[0135] Alternatively, the sheet metal 40 and the fasteners 50 may be made of metal.

[0136] Optionally, the cover 60 may be made of plastic.

[0137] It is understandable that when the plate 40 and fastener 50 are conductive components, if the debris generated after they are broken by pulling is scattered around the various electrical structures inside the battery box 20, it will have an adverse effect on the original electrical insulation state inside the box, and thus have an adverse effect on the safe operation of the battery device 100.

[0138] To this end, a covering 60 is fitted over the outside of the connecting end 41 of the plate 40. The receiving groove 61 of the single-sided opening 62 of the covering 60 forms a wrapping and limiting effect on the exposed structure 51 of the connecting end 41 and the fastener 50. This allows the debris generated by the tearing of the plate 40 and the debris generated by the breakage of the fastener 50 to be collected and constrained inside the receiving groove 61. This effectively limits the free displacement of the debris and reduces the possibility of debris falling into the electrical structure areas inside the battery box 20. This maintains the cleanliness of the internal structure and electrical insulation performance of the battery box 20, and ensures the long-term stability and safety of the battery device 100.

[0139] Furthermore, it should be noted that the plate 40 and fastener 50 are conductive components, and their surfaces are generally coated with insulating varnish. When the two are torn or broken, the insulating varnish on the surface of the broken part and the resulting debris is prone to failure. The covering part 60 is wrapped with insulating material around the connecting end 41 of the plate 40 and the outside of the fastener 50, which can form an insulating isolation structure around the conductive components. This can enclose and constrain the broken part where the insulating varnish fails and the debris, reduce the probability of electrical abnormalities caused by the debris overlapping the charged structure, and improve the insulation safety of the battery device 100.

[0140] refer to Figure 9 and Figure 10 , Figure 9 This is a three-dimensional structural schematic diagram of a fastener provided according to some embodiments of this application; Figure 10 This is a structural schematic diagram of fasteners passing through plates and coverings and connecting to beam members according to some embodiments of this application.

[0141] In some embodiments, such as Figure 9 and Figure 10 As shown, the exposed structure 51 includes a clamping part 511 and an operating end 512 connected to each other; the clamping part 511 abuts against the side of the connecting end 41 away from the beam member 30; the operating end 512 is disposed on the side of the clamping part 511 away from the connecting end 41.

[0142] Alternatively, fastener 50 may be a bolt; for example, fastener 50 may be a hex head bolt.

[0143] For example, the fastener 50 is a bolt, and the bolt head on the bolt forms an exposed structure 51; wherein, the outer peripheral surface of the operating end 512 can be formed by six surfaces connected end to end, and the clamping part 511 can be a roughly disc structure with a diameter larger than the diameter of the opening on the connecting end 41, so that the clamping part 511 can abut against the surface of the connecting end 41 on the side away from the beam member 30, so as to clamp and fix the plate 40 to the beam member 30.

[0144] It should be noted that the exposed structure 51 consists of a connected pressing part 511 and an operating end 512. The pressing part 511 abuts against the outside of the connecting end 41 and can press and limit the connecting end 41 of the plate 40. The operating end 512 is located on the outside, which makes it convenient for the operator to apply force to tighten and complete the fastener 50 locking operation. The structural layout takes into account both locking positioning and operation convenience.

[0145] Furthermore, such as Figure 9 and Figure 10 As shown, the fastener 50 also includes a connecting portion 52; the connecting portion 52 is disposed on the side of the clamping portion 511 away from the operating end 512; the connecting portion 52 passes through the connecting end 41 and is fixedly connected to the beam member 30, so as to cooperate with the clamping portion 511 to lock the connecting end 41 on the beam member 30.

[0146] For example, fastener 50 is selected as bolt, and the bolt shank forms the connecting part 52. The bolt shank can form a threaded engagement with beam member 30. To accommodate the bolt assembly, beam member 30 can be directly provided with threaded holes, or a matching connector with internal threads can be pre-installed; for example, a rivet nut 31 can be pre-installed on beam member 30. During assembly, the main body 63 of cover 60 is first fitted onto the connecting end 41 of plate 40. The bolt shank passes through plate 40 and cover 60 and is screwed into the rivet nut 31, simultaneously locking plate 40 and cover 60 to beam member 30. After all fasteners 50 are assembled, cover 64 is then fastened and installed on the outside of main body 63 to complete the sealing.

[0147] It should be understood that the screw and the opening on the connecting end 41 can be connected by threads, and the two can also be in no contact.

[0148] It should be noted that the connecting part 52 of the fastener 50 passes through the connecting end 41 and is fixed to the beam member 30. Together with the clamping part 511, it clamps the connecting end 41 of the positioning plate 40, so that the connecting end 41 is firmly assembled on the beam member 30, the overall stress structure is stable, and the assembly firmness of the plate 40 connection can be improved.

[0149] It should be noted that the fastener 50 can also be a screw, rivet, or other structure, and the embodiments of this application do not limit this.

[0150] refer to Figures 2 to 10The battery device 100 provided in the embodiments of this application includes a housing 20, a battery cell assembly 10, a beam member 30, a plate 40, a fastener 50, and a cover member 60. The housing 20 has an inner cavity; the battery cell assembly 10 is disposed in the inner cavity, and the battery cell assembly 10 includes a plurality of battery cells arranged along a first direction; the beam member 30 is disposed on one side of the battery cell assembly 10 in the first direction; the plate 40 has a connecting end 41, which is used to connect with the beam member 30; the fastener 50 passes through the connecting end 41 and is used to lock the connecting end 41 onto the beam member 30, and the fastener 50 includes an exposed structure 51, which is disposed on the side of the connecting end 41 away from the beam member 30; the cover member 60 is sleeved on the outside of the connecting end 41; wherein, the cover member 60 is provided with a receiving groove 61 with an opening 62 on one side, so that the connecting end 41 can be inserted into the receiving groove 61 through the opening 62, and at least a portion of the exposed structure 51 is covered within the receiving groove 61. In some embodiments, the cover 60 includes a detachably connected body 63 and a cover 64, the body 63 and the cover 64 enclosing and defining a receiving groove 61. In some embodiments, the body 63 includes a bottom wall 631 and four circumferentially connected side walls, the cavity enclosed by the four side walls having two opposing ports, one of which is an opening 62, and the other port is covered by the bottom wall 631; the four side walls include a first side wall 632 and a second side wall 633 opposing each other; the first side wall 632 is sandwiched between the connecting end 41 and the beam member 30, and a through hole 6321 is provided on the first side wall 632 for fasteners 50 to pass through; the second side wall 633 is located on the side of the connecting end 41 away from the beam member 30, and a clearance opening 6331 is provided on the second side wall 633 to expose the exposed structure 51; wherein, the cover 64 is disposed on the second side wall 633 and covers the clearance opening 6331. In some embodiments, the exposed structure 51 passes through the clearance opening 6331 and protrudes from the main body 63; the cover 64 is provided with a groove 641 to accommodate the portion of the exposed structure 51 protruding from the main body 63. In some embodiments, the covering 60 further includes a folding portion 65; the folding portion 65 is configured to connect the main body 63 and the cover 64, and can guide the cover 64 to fold over and cover the clearance opening 6331. In some embodiments, the folding portion 65 is a folding plate, the folding plate having a first edge and a second edge disposed opposite to each other; the first edge is movably connected to the side of the bottom wall 631 near the first side wall 632, so that the folding plate can fold along the first edge and fit against the side of the bottom wall 631 away from the cavity; the second edge is movably connected to the side of the cover 64 near the bottom wall 631, so that the cover 64 can fold along the second edge and fit against the side of the second side wall 633 away from the cavity, covering the clearance opening 6331.In some embodiments, the four sidewalls further include a third sidewall 634 and a fourth sidewall 635 disposed opposite to each other; a first mating portion is provided on the opposite sides of the third sidewall 634 and the fourth sidewall 635; a second mating portion is provided on the cover 64; wherein, one of the first mating portion and the second mating portion is a snap-fit ​​642 and the other is a slot 636, and the snap-fit ​​642 is detachably snapped into the slot 636. In some embodiments, the battery device 100 further includes a pad 70; when there is one pad 70, the pad 70 is disposed between the first sidewall 632 and the connecting end 41 or between the second sidewall 633 and the connecting end 41; when there are multiple pads 70, multiple pads 70 are disposed between the first sidewall 632 and the connecting end 41 and / or between the second sidewall 633 and the connecting end 41. In some embodiments, the plate 40 and / or the fastener 50 are conductive elements; the covering 60 is an insulating element. In some embodiments, the exposed structure 51 includes a clamping portion 511 and an operating end 512 connected together; the clamping portion 511 abuts against the side of the connecting end 41 opposite to the beam member 30; the operating end 512 is disposed on the side of the clamping portion 511 opposite to the connecting end 41. In some embodiments, the fastener 50 further includes a connecting portion 52; the connecting portion 52 is disposed on the side of the clamping portion 511 opposite to the operating end 512; the connecting portion 52 passes through the connecting end 41 and is fixedly connected to the beam member 30, so as to cooperate with the clamping portion 511 to lock the connecting end 41 onto the beam member 30.

[0151] 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. 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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, include: The box-shaped enclosure has an internal cavity. A battery cell assembly is disposed in the inner cavity, the battery cell assembly comprising a plurality of battery cells arranged along a first direction; A beam member is disposed on one side of the battery cell pack in the first direction; The plate has a connecting end for connecting to the beam member; A fastener, passing through the connecting end and used to lock the connecting end onto the beam member, the fastener including an exposed structure disposed on the side of the connecting end opposite to the beam member; and, A covering element is fitted onto the outside of the connecting end; The covering is provided with a receiving groove with an opening on one side, so that the connecting end can be placed into the receiving groove through the opening, and at least a portion of the exposed structure is covered in the receiving groove.

2. The battery device according to claim 1, characterized in that, The cover includes a detachably connected body and a cover, the body and the cover enclosing and defining the receiving groove.

3. The battery device according to claim 2, characterized in that, The main body includes a bottom wall and four circumferentially connected side walls. The cavity enclosed by the four side walls has two oppositely arranged ports, one of which is the opening and the other port is covered by the bottom wall. The four side walls include a first side wall and a second side wall that are arranged opposite to each other; The first sidewall is sandwiched between the connecting end and the beam member, and a through hole is provided on the first sidewall for the fastener to pass through; The second sidewall is located on the side of the connecting end away from the beam member, and an opening is provided on the second sidewall to expose the exposed structure; The cover is disposed on the second side wall and covers the clearance opening.

4. The battery device according to claim 3, characterized in that, The exposed structure passes through the clearance opening and protrudes from the main body; The cover has a groove to accommodate the portion of the exposed structure that protrudes from the main body.

5. The battery device according to claim 3, characterized in that, The covering also includes a folded portion; The folding portion is configured to connect the main body and the cover, and is capable of guiding the cover to fold over and cover the clearance opening.

6. The battery device according to claim 5, characterized in that, The folding part is a folding plate, and the folding plate has a first edge and a second edge that are disposed opposite to each other; The first edge is movably connected to the side of the bottom wall near the first side wall, so that the folding plate can be folded along the first edge and attached to the side of the bottom wall away from the cavity; The second edge is movably connected to the side of the cover near the bottom wall, so that the cover can be folded along the second edge and fit against the side of the second side wall away from the cavity, covering the clearance opening.

7. The battery device according to claim 3, characterized in that, The four side walls also include a third side wall and a fourth side wall arranged opposite to each other; The third sidewall and the fourth sidewall are provided with a first mating part on their opposite sides; The cover is provided with a second mating part; In this configuration, one of the first mating part and the second mating part is a buckle, and the other is a slot. The buckle can be detachably snapped into the slot.

8. The battery device according to claim 3, characterized in that, The battery device also includes a pad; When the number of the pads is one, the pad is disposed between the first sidewall and the connecting end or between the second sidewall and the connecting end; When there are multiple pads, the multiple pads are disposed between the first sidewall and the connecting end and / or between the second sidewall and the connecting end.

9. The battery device according to claim 2, characterized in that, The covering also includes a connecting structure; The connection structure is configured to connect the body and the cover.

10. The battery device according to claim 1, characterized in that, The plate and / or the fastener are conductive components; The covering is an insulating component.

11. The battery device according to any one of claims 1-10, characterized in that, The exposed structure includes a clamping part and an operating end connected together; The clamping part abuts against the side of the connecting end opposite to the beam member; The operating end is located on the side of the clamping part opposite to the connecting end.

12. The battery device according to claim 11, characterized in that, The fastener also includes a connecting portion; The connecting portion is located on the side of the clamping portion opposite to the operating end; The connecting part passes through the connecting end and is fixedly connected to the beam member, so as to cooperate with the clamping part to lock the connecting end on the beam member.

13. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-12, the battery device being used to provide or store electrical energy.

14. An energy storage device, characterized in that, Includes a battery device as described in any one of claims 1-12, the battery device being used to provide or store electrical energy.

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