Battery device, electric device and energy storage device

Abstract

The application relates to the technical field of batteries, and provides a battery device, a power utilization equipment and an energy storage equipment. The battery device comprises a main box body, a cover structure, a structural member and a connecting member; the main box body is provided with an opening, the cover structure is covered on the opening and forms a containing cavity together with the main box body, the structural member is arranged in the containing cavity and is fixed with the main box body, and the connecting member connects the cover structure and the structural member and realizes fixation of the two. At least one of the cover structure and the structural member and the connecting member are connected by magnetic attraction. The connecting member is used for tension fixation of the cover structure and the structural member in the box, the overall connection reliability and the structural strength can be improved, the cover structure can be effectively constrained, the convex deformation caused by battery expansion is inhibited, the anti-expansion capability and the structural safety margin are improved, meanwhile, the gap between the cover structure and the vehicle floor can be stably maintained, the abnormal sound caused by deformation contact can be improved, in addition, the magnetic attraction connection is convenient to disassemble and assemble and can be repeatedly used, and the assembly and maintenance efficiency is remarkably improved.

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] In traditional battery structures, the top cover is typically fixed to the main body only by its outer circumference, providing constraint only on the outer edge of the top cover. In some scenarios, the unconstrained areas of the top cover are prone to deformation and displacement, which can lead to abnormal noises and structural strength issues.

[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 problems of abnormal noise and structural strength caused by deformation and displacement of the battery structure.

[0006] In a first aspect, embodiments of this application provide a battery device, including a main housing, a cover structure, a structural member, and a connector. The main housing has an opening; the cover structure covers the opening of the main housing and, together with the main housing, defines a receiving cavity; the structural member is disposed within the receiving cavity and is fixedly connected to the main housing; the connector connects the cover structure and the structural member, and fixes the cover structure and the structural member together; wherein at least one of the cover structure and the structural member is magnetically connected to the connector.

[0007] In the above technical solution, by adding a connector between the cover structure and the structural components inside the main housing and using a magnetic fixing method, the following beneficial effects can be achieved: On the one hand, based on the cover structure and the main housing being closed and connected, further fixing the cover structure and the structural components together through the connector can significantly enhance the connection reliability and overall structural strength between the cover structure and the main housing; on the other hand, since the structural components are located inside the receiving cavity, the connector exerts a tensioning effect on the cover structure towards the receiving cavity, which can effectively suppress the outward deformation of the cover structure during battery expansion, improve the battery device's resistance to battery expansion forces, and enhance the structural safety and safety margin of the battery device; in addition, the magnetic fixing method is convenient to install and remove, simple to operate, and can be repeatedly installed and removed, which is conducive to improving the assembly and maintenance efficiency of the battery device.

[0008] Moreover, when the battery device is applied to a vehicle scenario, by controlling the deformation of the cover structure, a reasonable gap between the cover structure and the vehicle floor can be effectively maintained, reducing the probability of contact between the two, thereby improving the abnormal noise problem caused by relative displacement and improving the overall NVH performance of the vehicle.

[0009] In some embodiments, a connector is provided in the middle region of the cover structure facing the structural member.

[0010] In the above technical solution, the central region of the cover structure is prone to significant deformation during battery expansion. Therefore, by setting a connector in the central region of the cover structure, the structural strength and deformation suppression capability of the key areas of the cover structure can be specifically enhanced, effectively reducing the overall deformation of the cover structure and improving structural stability.

[0011] In some embodiments, the battery device further includes a battery cell assembly disposed within a receiving cavity; the structural component includes a retaining strap disposed between the battery cell assembly and the cover structure.

[0012] In the above technical solution, the structural component is designed as a fixed strip structure and arranged between the battery cell pack and the cover structure. On the one hand, the fixed strip can effectively constrain the expansion force of the battery cell pack, alleviate the load on the cover structure, and reduce the deformation of the cover structure; on the other hand, the fixed strip allows the connectors to be more easily arranged in the critical areas of the cover structure that are prone to deformation, thereby improving the stability and reliability of the overall structure.

[0013] In some embodiments, the retaining strap abuts against the side of the battery cell assembly facing the cover structure; wherein the cover structure and the battery cell assembly are electrically insulated.

[0014] In the above technical solution, since the fixing strap is fixedly connected to the main housing and can abut against the side of the battery cell pack facing the cover structure, it can effectively suppress the vibration or displacement of the battery cell pack under external impact, thereby improving the structural stability and performance of the battery device. At the same time, electrical insulation is used between the cover structure and the battery cell pack, which can reduce leakage and other potential safety hazards of the battery device.

[0015] In some embodiments, the battery cell group includes at least one battery cell column, the battery cell column including a plurality of battery cells arranged along a first direction; a fixing strip is laid along the first direction on the side of the battery cell column facing the cover structure.

[0016] In the above technical solution, by laying the fixing strip along the first direction on the side of the battery cell array facing the cover structure, the multiple battery cells arranged along the first direction can be constrained and positioned as a whole, suppressing battery expansion and improving the structural stability and safety of the battery cell array.

[0017] In some embodiments, multiple battery cells in a battery cell row are fixedly connected to a retaining strap.

[0018] In the above technical solution, by fixing multiple battery cells in the battery cell array to the fixing belt, the multiple battery cells form an integrated structure through the fixing belt, which effectively improves the overall connection and assembly stability between battery cells, reduces the relative displacement or loosening of battery cells during use, and thus improves the reliability and safety of the overall structure of the battery cell group.

[0019] In some embodiments, there are multiple connectors, and the multiple connectors are distributed between the fixing strap and the cover structure along the length direction of the fixing strap.

[0020] In the above technical solution, multiple connectors are distributed along the length of the fixing band between the fixing band and the cover structure. This enables multi-point connection and reliable fixation between the fixing band and the cover structure, improving the connection strength and assembly stability. Furthermore, the distribution of multiple connectors along the length of the fixing band allows for targeted constraint and reinforced support in critical areas prone to deformation, based on the actual stress and deformation of the cover structure. This effectively suppresses deformation of the cover structure at corresponding locations, enhancing the connection reliability between the cover structure and the fixing band, and improving the overall structural stability.

[0021] In some embodiments, the fixing strap is sequentially divided into a first segment, a second segment, and a third segment of equal length along its length; wherein at least some of the connectors are located in the second segment, and the number of connectors located in the second segment is greater than the number of connectors located in the first segment, and the number of connectors located in the second segment is greater than the number of connectors located in the third segment.

[0022] In the above technical solution, the fixing band is divided into three equal-length segments: a first segment, a second segment, and a third segment. Arranging more connectors in the second segment concentrates the constraint force on the central region of the battery cell pack, which experiences greater expansion, thus more effectively suppressing bulging in the center of the battery cell pack. Simultaneously, by incorporating more connectors in the second segment, the connection stiffness and structural stability of the central part of the cover structure are significantly enhanced. This effectively reduces warping, deformation, and displacement in the central part of the cover structure caused by battery expansion, preventing excessive deformation in the central part of the cover structure due to insufficient local constraint, thereby improving the structural reliability and safety performance of the entire battery device.

[0023] In some embodiments, the end faces of the plurality of connectors are flush with the end faces of the cover structure.

[0024] In the above technical solution, the end faces of multiple connectors facing one side of the cover structure are flush, which can provide stable support for the cover structure, improve the flatness of the cover structure, facilitate assembly operations, and enhance the consistency and reliability of the overall structure.

[0025] In some embodiments, the fixing strip includes a metal strip body and an insulating strip, the insulating strip being disposed on the side of the metal strip body facing the battery cell assembly in its thickness direction.

[0026] In the above technical solution, the fixing belt uses a metal belt to provide high-strength constraint to suppress battery expansion, and the insulating strip achieves electrical insulation, thereby improving the safety of battery use while ensuring structural reliability.

[0027] In some embodiments, the insulating strip includes a strip body and a bending member, the bending member being disposed on at least one side of the strip body in the width direction of the metal strip.

[0028] In the above technical solution, the setting of the bending component can enhance the structural strength and rigidity of the insulating strip itself, reduce deformation, and improve the overall structural stability.

[0029] In some embodiments, in the thickness direction of the metal strip, the bending member is located on the side of the pressure strip body away from the battery cell pack.

[0030] In the above technical solution, the bent component is located on the side of the pressure strip body away from the battery cell assembly in the thickness direction of the metal strip, that is, within the space between the pressure strip body and the cover structure. On the one hand, this arrangement makes full use of the existing gap space, does not occupy the installation height of the battery cell, and does not increase the overall height of the battery device, which is conducive to ensuring the battery energy density; on the other hand, the bent component can form a lateral restraint and cover on the metal strip in the width direction, which can reduce the possibility of lateral contact short circuits between the metal strip and the battery cell assembly or surrounding structures, thereby improving insulation reliability and structural stability.

[0031] In some embodiments, in the thickness direction of the metal strip, a connector is disposed on the side of the metal strip facing the cover structure; a first positioning part is disposed on the side of the connector facing the metal strip; a second positioning part is disposed on the side of the metal strip facing the connector; wherein, one of the first positioning part and the second positioning part is a convex structure and the other is a concave structure, and the convex structure can be matched and inserted with the concave structure.

[0032] In the above technical solution, the connector and the metal strip are engaged through a concave-convex structure, which can achieve precise positioning and reliable limiting, reduce relative displacement, and help improve connection stability and assembly efficiency. Moreover, placing the connector on the metal strip rather than the cover structure can reduce the processing and modification of the cover structure and the assembly difficulty, which is conducive to modular pre-assembly and reduces costs.

[0033] In some embodiments, the connector is glued to the metal strip.

[0034] In the above technical solution, the convex and concave structures are joined by an interlocking mechanism, which increases the contact area between the metal strip and the connector. Combined with adhesive fastening, this significantly improves the bonding strength and connection stability, reducing the likelihood of relative displacement or detachment during use. Furthermore, since at least one of the cover structure and structural components is magnetically fastened to the connector, and the connector is adhesively fastened to the metal strip, only a magnetic connection is required between the connector and the cover structure. This simplifies the design and assembly of the magnetic connection structure, improving assembly convenience and structural reliability.

[0035] In some embodiments, structural members include at least one of beam structures, partitions, cladding, and cold-rolled plates.

[0036] In the above technical solution, the structural components are designed as beam structures and / or plate structures within the main housing. These structures have high rigidity and strength, which can more effectively resist the expansion force of the battery cells and significantly reduce the deformation of the main housing and cover structure. At the same time, the beam structure and / or plate structure can form a stable frame support system inside the main housing, making the force transmission more direct and reliable. The overall structure has better impact resistance, load-bearing capacity, and durability, which is conducive to improving the stability and reliability of the overall battery device structure.

[0037] In some embodiments, the connector includes a magnet, at least a portion of the surface of which is covered with a magnetic shielding layer.

[0038] In the above technical solution, the connector is set as a magnet and at least part of its surface is wrapped with a magnetic shielding layer. This can not only use the magnetic attraction of the magnet to realize the rapid assembly and connection between the cover structure and the structural components, simplifying the disassembly and assembly process, but also effectively suppress the leakage of magnetic field through the magnetic shielding layer, avoiding interference to the battery cell pack and electrical components. At the same time, it can also protect the magnet, improving the safety, stability and durability of the structure.

[0039] In some embodiments, the battery device further includes a battery cell assembly disposed within a receiving cavity; an insulating layer is disposed between the cover structure and the battery cell assembly; and a connector passes through the insulating layer and is connected to the cover structure and the structural member respectively.

[0040] In the above technical solution, an insulating layer is set between the cover structure and the battery cell group, which can effectively achieve electrical insulation between the cover structure and the battery cell group, reduce the risk of short circuit, and improve the electrical safety of the battery device. Moreover, the connectors pass through the insulating layer and connect the cover structure and the structural components respectively. While ensuring reliable structural connection, the insulating layer can also achieve electrical insulation separation between the connectors and the battery cell group, reduce the risk of conductive contact, and further ensure the overall insulation reliability.

[0041] 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.

[0042] 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

[0043] 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.

[0044] Figure 1 This is a schematic diagram of the structure of a vehicle provided according to some embodiments of this application;

[0045] Figure 2 This is an exploded structural diagram of a battery device provided according to some embodiments of this application;

[0046] Figure 3 This is a bottom view of a cover structure provided according to some embodiments of this application;

[0047] Figure 4 This is a schematic diagram of the internal structure of a battery device provided according to some embodiments of this application;

[0048] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle;

[0049] Figure 6 This is a top view of a fixing strap with a connector installed according to some embodiments of this application;

[0050] Figure 7 This is a three-dimensional structural diagram of a fixing strap with a connector installed according to some embodiments of this application;

[0051] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the BB direction.

[0052] The attached figures are labeled as follows:

[0053] 1000 - Vehicles;

[0054] 100-Battery assembly, 110-Battery cell group, 1101-Battery cell row, 120-Box, 1201-Cover structure, 1201a-Intermediate area, 1202-Main box, 130-Connector, 1301-First positioning part, 1302-Magnetic shielding layer, 140-Fixing strap, 1401-First section, 1402-Second section, 1403-Third section, 1404-Metal strip, 1404a-Second positioning part, 1405-Insulating strip, 1405a-Strip body, 1405b-Bending part, 150-Insulating layer, 160-Front beam, 170-Rear beam;

[0055] 200-Controller;

[0056] 300-motor. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly specified.

[0068] 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.

[0069] 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.

[0070] During charge-discharge cycles, individual battery cells are prone to bulging and deformation, affecting their structural safety and reliability. Currently, the top cover (cover structure) of battery devices typically uses lightweight materials or thin-walled structures, resulting in relatively weak overall rigidity and making them susceptible to elastic deformation under stress.

[0071] In traditional structures, the top cover and main casing are typically fixed together only by bolts or clips around the outer perimeter. This only constrains the outer edges of the top cover, lacking effective support for the central area, specifically the Z-axis (height direction of the battery pack). During cyclic charging and discharging, individual battery cells generate continuous expansion forces, typically ranging from 5 to 15 kN. Under the long-term effects of these expansion forces, peripheral constraints alone are insufficient to provide adequate structural resistance, easily leading to noticeable bulging deformation in the central area of ​​the top cover. This reduces the overall structural safety margin of the battery pack and affects structural durability.

[0072] When this type of battery device is used in a vehicle, during vehicle operation, the combined effects of road surface excitation, vehicle body torsion, and battery expansion forces cause the top cover to deform and come into contact with the vehicle floor. Micrometer-level relative displacement can also occur between the top cover and the vehicle floor, resulting in abnormal noises such as "clicking," affecting the overall vehicle's NVH (Noise, Vibration, and Harshness) performance and driving experience. Simultaneously, long-term vibration and relative displacement can accelerate the wear of the sealing strip between the top cover and the main housing, and may also cause the connecting bolts to loosen, further exacerbating the abnormal noise problem and reducing the sealing performance and connection reliability of the battery device, posing potential safety risks.

[0073] Therefore, under the premise of ensuring the lightweight and energy density of the battery device, how to effectively suppress the structural deformation caused by battery expansion, improve the abnormal noise, and enhance the structural safety and reliability has become a key technical problem that urgently needs to be solved in the field of power battery structure design.

[0074] To address the aforementioned issues, embodiments of this application provide a battery device comprising a main housing, a cover structure, a structural member, and a connector. The main housing has an opening; the cover structure covers the opening of the main housing and, together with the main housing, defines a receiving cavity; the structural member is disposed within the receiving cavity and is fixedly connected to the main housing; the connector connects the cover structure and the structural member, thereby fixing the cover structure and the structural member together; wherein at least one of the cover structure and the structural member is magnetically connected to the connector.

[0075] The beneficial effects of the battery device in the above solution are as follows: By tightening and fixing the cover structure to the structural components inside the main housing through the connectors, the overall connection reliability and structural strength can be enhanced. Simultaneously, the cover structure is effectively constrained, suppressing outward deformation caused by battery expansion, improving resistance to expansion forces, and enhancing structural safety and safety margin. This constraint method can effectively maintain a reasonable gap between the cover structure and the vehicle floor, reducing the probability of contact between the two, thereby improving the problem of abnormal noise caused by relative displacement and enhancing the overall NVH performance of the vehicle. Furthermore, the magnetic connection is convenient to install and remove, and can be reused, which helps improve assembly and maintenance efficiency.

[0076] 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.

[0077] For ease of description, this application uses the application of a battery device in a vehicle as an example for illustration.

[0078] 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.

[0079] 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.

[0080] 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 cell pack 110 and a housing 120. The housing 120 has a receiving cavity, in which the battery cell pack 110 is received.

[0081] In some embodiments, the battery device 100 may include one or more battery cell assemblies 110 for providing voltage and capacity. Each battery cell assembly 110 may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0082] In some embodiments, the battery cell group 110 is typically formed by arranging multiple battery cells.

[0083] As an example, the battery cell group 110 can be a battery module, which consists of multiple battery cells arranged and fixed to form an independent module.

[0084] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0085] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 120 and one or more battery cell groups 110, the battery cell groups 110 being housed in the housing 120.

[0086] As an example, the battery cell pack 110 can be a battery module, and the battery cell pack 110 can be housed in the housing 120 by fixing the battery module in the housing 120.

[0087] As an example, the battery cell pack 110 can also be housed in the housing 120 by directly fixing multiple battery cells to the housing 120.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] In some embodiments, the housing 120 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 120 for housing the battery cell pack 110. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0092] 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 are respectively connected to the frame, so that the interior of the housing 120 forms a closed space to accommodate the battery cell pack 110. The first housing section may be a cover structure 1201, which may be a top cover or a bottom plate; correspondingly, the second housing section may be a main housing 1202, which may be composed of a bottom plate and a frame or a top cover and a frame.

[0093] 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 crossbeams and longitudinal beams of the vehicle 1000.

[0094] 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.

[0095] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device provided according to some embodiments of this application.

[0096] Firstly, such as Figure 2 As shown, an embodiment of this application provides a battery device 100, including a main housing 1202, a cover structure 1201, a structural member, and a connector 130. The main housing 1202 has an opening; the cover structure 1201 covers the opening of the main housing 1202, and the cover structure 1201 and the main housing 1202 together define a receiving cavity; the structural member is disposed in the receiving cavity and is fixedly connected to the main housing 1202; the connector 130 connects the cover structure 1201 and the structural member, and the connector 130 fixes the cover structure 1201 and the structural member together; wherein, at least one of the cover structure 1201 and the structural member is magnetically connected to the connector 130.

[0097] It is understood that the cover structure 1201 and the main housing 1202 together form the housing 120 of the battery device 100. The cover structure 1201 covering the opening of the main housing 1202 means that the cover structure 1201 can seal the opening of the main housing 1202, and the cover structure 1201 can also be fixedly connected to the main housing 1202. The cover structure 1201 sealing the opening of the main housing 1202 can be either sealed or unsealed. The connection between the cover structure 1201 and the main housing 1202 can be achieved by using bolts or clips around the outer perimeter to create a constraint on the outer edge of the cover structure 1201.

[0098] Optionally, the cover structure 1201 can be made of steel; for example, HC220 (cold-rolled low-carbon / interstitial steel), DP590 (dual phase steel), etc.

[0099] Optionally, the cover structure 1201 can be a thin plate structure; for example, the thickness of the cover structure 1201 can be 0.7 mm to 1 mm.

[0100] For example, the cover structure 1201 can be a 0.7 mm stamped steel sheet.

[0101] In this embodiment, the structural component is an internal component of the box. The structural component can be directly fixedly connected to the main box 1202, while the structural component needs to be indirectly fixedly connected to the cover structure 1201 through the connector 130. Based on this, the structural component can be assembled into the main box 1202 first, and the connector 130 can be assembled onto the structural component or the cover structure 1201. In this way, when the cover structure 1201 and the main box 1202 are combined to form the box 120, the fixed connection between the cover structure 1201 and the structural component can be achieved together.

[0102] Optionally, the connection between the structural components and the main housing 1202 can be achieved by bonding, welding, snap-fitting, bolting, integral manufacturing, etc.

[0103] It should be noted that, based on the cover structure 1201 and the main housing 1202 being closed and connected, the cover structure 1201 is further fixedly connected to the structural component via the connector 130. This significantly enhances the connection reliability and overall structural strength between the cover structure 1201 and the main housing 1202. Simultaneously, since the structural component is located within the receiving cavity, the connector 130 exerts a tensioning effect on the cover structure 1201 towards the receiving cavity, additionally increasing the Z-axis constraint on the cover structure 1201. This effectively suppresses the outward deformation of the cover structure 1201 during battery expansion, improving the battery device 100's resistance to battery expansion forces and enhancing the structural safety and safety margin of the battery device 100.

[0104] It should be noted that when the battery device 100 is applied to a vehicle, by controlling the deformation of the cover structure 1201 during battery expansion, a reasonable gap can be maintained between the cover structure 1201 and the vehicle floor, reducing the probability of contact between the two. This improves the noise problem caused by relative displacement and enhances the overall NVH performance of the vehicle. Thus, compared to traditional noise reduction solutions that involve adding a sound insulation pad between the cover structure 1201 and the vehicle floor, this structure can directly eliminate the need for the sound insulation pad (a conventional sound insulation pad weighs approximately 0.3 kg). This effectively reduces noise while achieving structural weight reduction and cost reduction, improving the overall lightweight and economic efficiency of the battery device 100.

[0105] In this embodiment, at least one of the cover structure 1201 and the structural component is magnetically connected to the connector 130, which may include at least the following situations:

[0106] 1) The cover structure 1201 is magnetically connected to the connector 130, and the structural component is magnetically connected to the connector 130; wherein, the cover structure 1201, the structural component and the connector 130 can all be ferromagnetic components, and there is an attraction between the connector 130 and the cover structure 1201, and there is an attraction between the connector 130 and the structural component, so that the connector 130 can be magnetically fixed to the cover structure 1201 and the structural component respectively.

[0107] 2) The cover structure 1201 and the connector 130 are magnetically connected, while the structural component and the connector 130 are fixedly connected in a non-magnetic manner; wherein, the cover structure 1201 and the connector 130 can be ferromagnetic components, and there is an attraction between the connector 130 and the cover structure 1201 so that the connector 130 can be magnetically fixed to the cover structure 1201; optionally, the connection method between the structural component and the connector 130 can be bonding, welding, snap-fitting, bolting connection, integral manufacturing, etc.

[0108] 3) The cover structure 1201 and the connector 130 are fixedly connected in a non-magnetic manner, while the structural component and the connector 130 are magnetically connected; wherein, the structural component and the connector 130 can be ferromagnetic components, and there is an attraction between the connector 130 and the structural component, so that the connector 130 can be magnetically fixed to the structural component; optionally, the connection method between the cover structure 1201 and the connector 130 can be adhesive bonding, welding, snap-fitting, bolt fastening connection, integral manufacturing, etc.

[0109] It should be noted that the magnetic fixing method is convenient to install and remove, simple to operate, and can be repeatedly installed and removed, which helps to improve the assembly and maintenance efficiency of the battery device 100.

[0110] refer to Figure 3 , Figure 3 This is a bottom view of a cover structure provided according to some embodiments of this application.

[0111] In some embodiments, such as Figure 3 As shown, a connector 130 is provided in the middle region 1201a of the cover structure 1201 facing the structural member.

[0112] Specifically, the end face of the cover structure 1201 facing the structural component can be divided into a central region 1201a and a side region, with the side region surrounding the outer periphery of the central region 1201a. The side region can be used for a closed connection with the main housing 1202. The central region 1201a can be understood as the region located in the middle of the cover structure 1201 and maintaining a certain distance from the edge of the cover structure 1201.

[0113] For example, one way to define the middle region 1201a of the cover structure 1201 is to define two directions that are perpendicular to each other and both perpendicular to the thickness direction of the cover structure 1201 as the second direction and the third direction, divide the cover structure 1201 into three equal parts along the second direction, and define the middle region of these three parts as the first region, divide the cover structure 1201 into three equal parts along the third direction, and define the middle region of these three parts as the second region, and the intersection region between the first region and the second region can be the middle region 1201a of the cover structure 1201.

[0114] Of course, there is no limitation on the way to define the intermediate region 1201a. Any area of ​​the cover structure 1201 that is prone to deformation and is not located at the edge of the cover structure 1201 can be defined as the intermediate region 1201a of the cover structure 1201. This application embodiment does not make any special limitation on this.

[0115] It should be noted that during the battery expansion process, the middle region 1201a of the cover structure 1201 is prone to significant deformation. Therefore, by providing a connector 130 in the middle region 1201a of the cover structure 1201, the structural strength and deformation suppression capability of the key areas of the cover structure 1201 can be specifically enhanced, effectively reducing the overall deformation of the cover structure 1201 and improving structural stability.

[0116] It should be noted that the number of connectors 130 can be one or more. When there are multiple connectors 130, in addition to the middle region 1201a of the cover structure 1201 facing the structural member, the connectors 130 can also be set in other regions of the cover structure 1201; by arranging connectors 130 in different regions of the cover structure 1201, the overall structural strength and deformation suppression capability of the cover structure 1201 can be improved.

[0117] refer to Figure 2 , Figures 4 to 8 , Figure 4 This is a schematic diagram of the internal structure of a battery device provided according to some embodiments of this application; Figure 5 for Figure 4 A magnified structural diagram of part A in the middle; Figure 6 This is a top view of a fixing strap with a connector installed according to some embodiments of this application; Figure 7 This is a three-dimensional structural diagram of a fixing strap with a connector installed according to some embodiments of this application; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the BB direction.

[0118] In some embodiments, such as Figure 2 As shown, the battery device 100 also includes a battery cell assembly 110, which is disposed within the receiving cavity; the structural component includes a fixing strap 140, which is disposed between the battery cell assembly 110 and the cover structure 1201.

[0119] For example, one possible connection method between the fixing strap 140 and the main housing 1202 can be: as follows Figure 2 As shown, a front beam 160 and a rear beam 170 are arranged opposite to each other inside the main housing 1202. The battery cell assembly 110 can be clamped between the front beam 160 and the rear beam 170. The two ends of the fixing strap 140 are fixedly connected to the front beam 160 and the rear beam 170, respectively. The connection between the fixing strap 140 and the front beam 160 and the rear beam 170 can be achieved by bolt fastening.

[0120] It should be noted that the structural component is designed as a strip structure in the form of a fixing strap 140, and is arranged between the battery cell pack 110 and the cover structure 1201. On the one hand, the fixing strap 140 can effectively constrain the expansion force of the battery cell pack 110, alleviate the load on the cover structure 1201, and reduce the deformation of the cover structure 1201; on the other hand, the fixing strap 140 allows the connector 130 to be more easily arranged in the critical areas of the cover structure 1201 that are prone to deformation (such as the middle area 1201a), thereby improving the stability and reliability of the overall structure.

[0121] Furthermore, such as Figure 2 and Figure 4 As shown, the fixing strap 140 abuts against the side of the battery cell assembly 110 facing the cover structure 1201; wherein the cover structure 1201 and the battery cell assembly 110 are electrically insulated from each other.

[0122] Optionally, the area in the battery cell pack 110 that is abutted by the fixing band 140 is a planar area and there are no terminals (electrode terminals) in the battery cell pack 110.

[0123] Optionally, the fixing strip 140 may be entirely insulated; or, the structure of the fixing strip 140 facing the battery cell pack 110 may be made of insulating material. This achieves insulation between the cover structure 1201 and the battery cell pack 110. Alternatively, the fixing strip 140 may be designed as a conductor; in this case, at least a portion of the connector 130 must be designed as an insulator to provide electrical insulation between the cover structure 1201 and the battery cell pack 110.

[0124] It should be noted that, since the fixing strap 140 is fixedly connected to the main housing 1202, and the fixing strap 140 can abut against the side of the battery cell pack 110 facing the cover structure 1201, it can effectively suppress the vibration or displacement of the battery cell pack 110 under external impact, thereby improving the structural stability and performance of the battery device 100. At the same time, the cover structure 1201 and the battery cell pack 110 are designed to be non-conductive (mutually insulated), which can reduce leakage and other potential safety hazards of the battery device 100.

[0125] Furthermore, such as Figure 2 As shown, the battery cell group 110 includes at least one battery cell row 1101, and the battery cell row 1101 includes a plurality of battery cells arranged along a first direction; the fixing strap 140 is laid along the first direction on the side of the battery cell row 1101 facing the cover structure 1201.

[0126] The battery cell array 1101 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.

[0127] It is understandable that by using the fixing strip 140 to lay along the first direction, the multiple battery cells arranged along the first direction can be constrained and positioned as a whole, improving the structural stability of the battery cell pack 110. In addition, during the charging and discharging process, the main expansion force generated by the battery cells is transmitted in the large-area stacking direction (first direction). Laying the fixing strip 140 along the first direction can effectively suppress the expansion deformation of the battery cells during the charging and discharging process, reducing the impact of expansion on battery performance and safety.

[0128] Optionally, such as Figure 2 As shown, there can be multiple rows of battery cells 1101, and the fixing strip 140 can be laid between two adjacent rows of battery cells 1101. In this way, the fixing strip 140 can further constrain and position more battery cells.

[0129] It should be noted that the fixing strap 140 is laid on the side of the battery cell row 1101 facing the cover structure 1201, which can provide Z-direction constraint on the battery cell row 1101 and improve the stability of the battery cell row 1101 in the housing 120.

[0130] Meanwhile, the way the fixing strap 140 and the battery cell array 1101 are matched is simple in structure and easy to assemble, which helps to improve the integration and reliability of the battery device 100.

[0131] Furthermore, multiple battery cells in the battery cell row 1101 are fixedly connected to the fixing band 140.

[0132] It is understandable that by fixing multiple battery cells in the battery cell array 1101 to the fixing belt 140, the multiple battery cells form an integrated structure through the fixing belt 140, which effectively improves the overall connection and assembly stability between battery cells, reduces the occurrence of relative displacement or loosening of battery cells during use, and thus improves the reliability and safety of the overall structure of the battery cell array 110.

[0133] Optionally, the battery cells in contact with the fixing strap 140 are fixedly connected.

[0134] Alternatively, the connection between the fixing strap 140 and the battery cell can be achieved by adhesive bonding, snap-fitting, etc.

[0135] It should be noted that the electrical insulation between the fixing strap 140 and the battery cell can be achieved by: at least one side of the fixing strap 140 that is in contact with the battery cell being made of insulating material; or, the fixing strap 140 and the battery cell being glued together, and the glue between them can be an insulating component.

[0136] Furthermore, such as Figure 4 and Figure 6 As shown, there are multiple connectors 130, and these connectors 130 are distributed between the fixing strap 140 and the cover structure 1201 along the length direction of the fixing strap 140. The length direction of the fixing strap 140 can be considered as the first direction.

[0137] Optionally, the distance L between two adjacent connectors 130 is 100-150mm. For example, the distance L can be 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, etc. In this way, by reasonably limiting the range of the distance L, the adjacent connectors 130 can maintain an appropriate distance, thereby improving the adsorption and fixation effect of multiple connectors 130 on the cover structure 1201 under the synergistic action of the two connectors.

[0138] It is understandable that by providing multiple connectors 130 between the fixing strap 140 and the cover structure 1201, a multi-point connection and reliable fixation can be formed between the fixing strap 140 and the cover structure 1201, thereby improving the connection strength and assembly stability between the two.

[0139] It should be noted that since multiple connectors 130 are distributed along the length of the fixing belt 140, the connectors 130 can be densely arranged in key areas prone to deformation according to the actual stress and deformation of the cover structure 1201. This can achieve key constraint and reinforcement support in the area, effectively suppress the deformation of the cover structure 1201 at the corresponding position, and improve the connection reliability and overall structural stability between the cover structure 1201 and the fixing belt 140.

[0140] Furthermore, such as Figure 6 As shown, the fixing strap 140 is divided into a first segment 1401, a second segment 1402, and a third segment 1403 of equal length along its length; wherein at least some of the connectors 130 are located in the second segment 1402, and the number of connectors 130 located in the second segment 1402 is greater than the number of connectors 130 located in the first segment 1401, and the number of connectors 130 located in the second segment 1402 is greater than the number of connectors 130 located in the third segment 1403.

[0141] It is understandable that the first segment 1401, the second segment 1402, and the third segment 1403 can be regarded as a three-part structure of the fixed strip 140 along its length. Among them, the second segment 1402 can generally correspond to the middle region of the battery cell row 1101 and the middle part of the cover structure 1201.

[0142] It should be noted that the fixing strap 140 is divided into a first segment 1401, a second segment 1402, and a third segment 1403 of equal length along its length, and more connectors 130 are provided in the second segment 1402. This can significantly enhance the connection stiffness and structural stability of the middle part of the cover structure 1201, effectively reduce the warping, deformation, and displacement of the middle part of the cover structure 1201, and avoid excessive deformation of the middle part of the cover structure 1201 due to insufficient local constraints, thereby improving the structural reliability and safety performance of the entire battery device 100.

[0143] It should be noted that the multiple connectors 130 can be set at equal or unequal intervals, and this application embodiment does not impose any particular limitation on this.

[0144] Furthermore, such as Figure 4 As shown, the end faces of multiple connectors 130 are flush with the end faces of the cover structure 1201.

[0145] It is understood that the end face of the connector 130 facing the cover structure 1201 can be defined as the surface of the connector 130 that directly contacts the cover structure 1201. Folding these end faces of multiple connectors 130 together means that the height of each end face is consistent.

[0146] It should be noted that the multiple connectors 130 are flush with the end faces of the cover structure 1201, which can provide stable support for the cover structure 1201, improve the flatness of the cover structure 1201, facilitate assembly operations, and enhance the consistency and reliability of the overall structure.

[0147] Furthermore, such as Figure 7 and Figure 8 As shown, the fixing strip 140 includes a metal strip body 1404 and an insulating strip 1405. The insulating strip 1405 is disposed on the side of the metal strip body 1404 facing the battery cell assembly 110 in its thickness direction. The thickness direction of the metal strip body 1404 can be regarded as the thickness direction of the fixing strip 140.

[0148] Understandably, the metal strip 1404 has high structural strength, effectively constraining the expansion of the battery cell assembly 110 and ensuring overall structural strength and stability. The insulating strip 1405 has insulating properties and is located on the side of the metal strip 1404 facing the battery cell assembly 110, achieving electrical insulation between the metal strip 1404 and the battery cell assembly 110, reducing the risk of short circuits and improving battery safety.

[0149] Optionally, the metal strip 1404 can be a steel strip.

[0150] Alternatively, the insulating strip 1405 may be made of a non-conductive composite material.

[0151] Optionally, the metal strip 1404 and the insulating strip 1405 can be fixedly connected or abutted together. When the metal strip 1404 and the insulating strip 1405 are fixedly connected, the connection method between the two can be adhesive bonding, snap-fitting, integral manufacturing, etc.

[0152] It should be noted that the fixing strap 140 uses a metal strap body 1404 to provide high-strength constraint to suppress battery expansion, and achieves electrical insulation through the insulating pressure strip 1405, thereby improving battery safety while ensuring structural reliability.

[0153] Furthermore, such as Figure 8 As shown, the insulating strip 1405 includes a strip body 1405a and a bending member 1405b, the bending member 1405b being disposed on at least one side of the strip body 1405a in the width direction of the metal strip 1404. The width direction of the metal strip 1404 can be considered as the width direction of the fixing strip 140.

[0154] Understandably, the setting of the bending component 1405b can enhance the structural strength and rigidity of the insulating strip 1405 itself, reduce deformation, and improve the overall structural stability.

[0155] Optionally, the pressure strip body 1405a can be a thin layer structure in the form of a strip.

[0156] Optionally, the number of bending elements 1405b is two, and the two bending elements 1405b can be arranged opposite each other on both sides of the metal strip 1404 in its width direction.

[0157] Optionally, the bending element 1405b and the pressure strip body 1405a can be integrally manufactured.

[0158] Optionally, in the thickness direction of the metal strip 1404, the bent piece 1405b is located on the side of the pressure strip body 1405a away from the battery cell pack 110.

[0159] It should be noted that the bent component 1405b is located on the side of the pressure strip body 1405a away from the battery cell assembly 110 in the thickness direction of the metal strip 1404, that is, within the space between the pressure strip body 1405a and the cover structure 1201. On the one hand, this arrangement makes full use of the existing gap space, does not occupy the installation height of the battery cell, and does not increase the overall height of the battery device 100, which is conducive to ensuring the battery energy density; on the other hand, the bent component 1405b can form a lateral limit and cover on the metal strip 1404 in the width direction, which can reduce the possibility of lateral contact short circuit between the metal strip 1404 and the battery cell assembly 110 or surrounding structures, thereby improving insulation reliability and structural stability.

[0160] Furthermore, such as Figure 5 and Figure 8 As shown, in the thickness direction of the metal strip 1404, the connector 130 is disposed on the side of the metal strip 1404 facing the cover structure 1201; a first positioning part 1301 is disposed on the side of the connector 130 facing the metal strip 1404; a second positioning part 1404a is disposed on the side of the metal strip 1404 facing the connector 130; wherein, one of the first positioning part 1301 and the second positioning part 1404a is a convex structure and the other is a concave structure, and the convex structure can be matched and inserted with the concave structure.

[0161] Understandably, by forming a concave-convex fit between the first positioning part 1301 and the second positioning part 1404a, precise positioning and assembly guidance between the connector 130 and the metal strip 1404 are achieved in the thickness direction of the metal strip 1404. This effectively reduces assembly difficulty and prevents relative offset or misalignment between the metal strip 1404 and the connector 130 during assembly. Furthermore, the interlocking and matching of the convex and concave structures can limit the relative displacement of the metal strip 1404 and the connector 130 in the planar direction, improving the reliability and stability of their connection, thereby ensuring the constraint effect on the battery cell assembly 110 and enhancing the overall structural stability.

[0162] It should be noted that placing the connector 130 on the metal strip 1404 instead of the cover structure 1201 can reduce the difficulty of processing and assembly of the cover structure 1201, facilitate modular pre-assembly, and reduce costs.

[0163] Furthermore, the connector 130 is glued to the metal strip 1404.

[0164] It is understandable that, based on the convex and concave structures of the connector 130 and the metal strip 1404, the two are also fixed by adhesive bonding, which can increase the contact area between the metal strip 1404 and the connector 130. Combined with the adhesive fixing method, the bonding strength and connection stability between the two can be significantly improved, which can reduce the occurrence of relative displacement or detachment during use.

[0165] It should be noted that since at least one of the cover structure 1201 and the structural component is magnetically fixed to the connector 130, and the connector 130 is glued to the metal strip 1404, the connector 130 and the cover structure 1201 only need to achieve magnetic attraction, thereby simplifying the magnetic attraction structure design and assembly between the two, and improving assembly convenience and structural reliability.

[0166] In some embodiments, structural members include at least one of beam structures, partitions, cladding, and cold-rolled plates.

[0167] The beam structure and partition are installed inside the main housing 1202, which can be used to strengthen the main housing 1202 and separate the internal space of the main housing 1202; the protective plate can be used to strengthen the structural strength and impact resistance of the battery device 100; and the cold plate can be used to exchange heat with the battery cells.

[0168] It should be noted that designing the structural components as beam structures and / or plate structures within the main box 1202 has at least the following advantages:

[0169] 1) Higher structural stiffness and strength: Beam and / or plate structures are rigid support structures, which can provide stronger resistance to bending, torsion and deformation, effectively resist the force generated by the expansion of the battery cell pack 110, and the overall structure is more stable.

[0170] 2) The support for the main body 1202 and the cover structure 1201 is more direct and reliable: the beam structure and / or plate structure can directly form a frame support system inside the main body 1202, the force path is clearer and the transmission is more stable, which can reduce the deformation of the main body 1202 and the cover structure 1201 from the source and protect the internal battery cell group 110.

[0171] 3) Enhanced overall structural integrity: Beam and / or plate structures can form an integrated load-bearing frame with the main housing 1202, which is more conducive to improving the overall structural strength, impact resistance and durability of the battery device 100.

[0172] 4) Facilitates modularization and standardization: Beam and / or plate structures facilitate the formation of a regular installation space within the main housing 1202, which is more conducive to the arrangement, positioning and assembly of battery cell packs 110, and improves the overall integration of the battery device 100.

[0173] It should be noted that the structural component can also be other components located within the receiving cavity and fixedly connected to the main housing 1202, and this application embodiment does not particularly limit this.

[0174] In some embodiments, such as Figure 5 and Figure 8 As shown, the connector 130 includes a magnet, and at least a portion of the surface of the magnet is covered with a magnetic shielding layer 1302.

[0175] Optionally, the technical requirements for the magnet are as follows: the magnet can be made of samarium cobalt or N52H grade neodymium iron boron; its working temperature is not lower than 90℃, and its remanence Br is not lower than 1.2T.

[0176] Optionally, the magnet has a cylindrical structure with a diameter of approximately 12mm-20mm; for example, the diameter of the magnet can be 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, etc.

[0177] Optionally, the magnetic shielding layer 1302 can be a 0.1 mm permalloy foil.

[0178] Optionally, all surfaces of the magnet other than the surface in contact with the cover structure 1201 are covered with a magnetic shielding layer 1302.

[0179] It should be noted that by setting the connector 130 as a magnet and wrapping at least a portion of the magnet's surface with a magnetic shielding layer 1302, the technical effects are as follows:

[0180] 1) Using a magnet as a connector 130, the cover structure 1201 and the structural components can be quickly assembled without bolts or welding through magnetic adsorption, simplifying the assembly process and improving the efficiency of disassembly and maintenance.

[0181] 2) The magnet surface is wrapped with a magnetic shielding layer 1302, which can effectively constrain the magnetic field distribution of the magnet, prevent the magnetic field from leaking out and interfering with the battery cells, electrical components and signal transmission, and ensure the stability and safety of the battery system.

[0182] 3) The magnetic shielding layer 1302 can also protect the magnet, reduce the impact of corrosion and impact on the magnet's performance, and improve the structural durability and reliability.

[0183] In some embodiments, such as Figure 4 and Figure 5 As shown, the battery device 100 also includes a battery cell group 110, which is disposed in the receiving cavity; an insulating layer 150 is disposed between the cover structure 1201 and the battery cell group 110; a connector 130 passes through the insulating layer 150 and is connected to the cover structure 1201 and the structural member respectively.

[0184] Optionally, the insulation layer 150 is foam.

[0185] Alternatively, the insulating layer 150 can be applied to the side of the cover structure 1201 facing the battery cell pack 110 by adhesive bonding.

[0186] It should be noted that by setting an insulating layer 150 between the cover structure 1201 and the battery cell group 110, electrical insulation between the cover structure 1201 and the battery cell group 110 can be effectively achieved, reducing the risk of short circuit and improving the electrical safety of the battery device 100.

[0187] Furthermore, the connector 130 passes through the insulating layer 150 and connects the cover structure 1201 and the structural component respectively. While ensuring a reliable connection of the structure, the insulating layer 150 can also achieve electrical insulation separation between the connector 130 and the battery cell group 110, reducing the risk of conductive contact and further ensuring the overall insulation reliability.

[0188] refer to Figures 2 to 8The battery device 100 provided in the embodiments of this application includes a main housing 1202, a cover structure 1201, a structural member, and a connector 130. The main housing 1202 has an opening; the cover structure 1201 covers the opening of the main housing 1202, and the cover structure 1201 and the main housing 1202 together define a receiving cavity; the structural member is disposed in the receiving cavity and is fixedly connected to the main housing 1202; the connector 130 connects the cover structure 1201 and the structural member, and the connector 130 fixes the cover structure 1201 and the structural member; wherein, at least one of the cover structure 1201 and the structural member is magnetically connected to the connector 130. In some embodiments, the connector 130 is provided in the middle region 1201a of the cover structure 1201 facing the structural member. In some embodiments, the battery device 100 further includes a battery cell assembly 110 disposed within a receiving cavity; the structural member is a fixing strap 140 disposed between the battery cell assembly 110 and the cover structure 1201. Further, the fixing strap 140 abuts against the side of the battery cell assembly 110 facing the cover structure 1201; wherein the cover structure 1201 and the battery cell assembly 110 are non-conductive. Further, the battery cell assembly 110 includes at least one battery cell row 1101, the battery cell row 1101 including a plurality of battery cells arranged along a first direction; the fixing strap 140 is laid along the first direction on the side of the battery cell row 1101 facing the cover structure 1201. Further, the plurality of battery cells in the battery cell row 1101 are fixedly connected to the fixing strap 140. Further, the number of connectors 130 is plurality, and the plurality of connectors 130 are distributed along the length direction of the fixing strap 140 between the fixing strap 140 and the cover structure 1201. Furthermore, the end faces of the plurality of connectors 130 facing the cover structure 1201 are flush. Furthermore, the fixing strip 140 includes a metal strip body 1404 and an insulating strip 1405, the insulating strip 1405 being disposed on the side of the metal strip body 1404 facing the battery cell assembly 110 in its thickness direction. Furthermore, the insulating strip 1405 includes a strip body 1405a and a bending member 1405b, the bending member 1405b being disposed on at least one side of the strip body 1405a in the width direction of the metal strip body 1404. Optionally, in the thickness direction of the metal strip body 1404, the bending member 1405b is located on the side of the strip body 1405a facing away from the battery cell assembly 110. Furthermore, in the thickness direction of the metal strip 1404, the connector 130 is disposed on the side of the metal strip 1404 facing the cover structure 1201; a first positioning part 1301 is disposed on the side of the connector 130 facing the metal strip 1404; a second positioning part 1404a is disposed on the side of the metal strip 1404 facing the connector 130; wherein, one of the first positioning part 1301 and the second positioning part 1404a is a convex structure and the other is a concave structure, and the convex structure can be matched and inserted with the concave structure.Furthermore, the connector 130 is glued to the metal strip 1404. In some embodiments, the connector 130 is a magnet, and at least a portion of the surface of the magnet is covered with a magnetic shielding layer 1302. In some embodiments, the battery device 100 further includes a battery cell assembly 110 disposed within a receiving cavity; an insulating layer 150 is disposed between the cover structure 1201 and the battery cell assembly 110; the connector 130 passes through the insulating layer 150 and is connected to the cover structure 1201 and the structural member, respectively.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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 main body has an opening; A cover structure is provided on the opening of the main box body and together with the main box body, it defines the receiving cavity. Structural components are disposed within the receiving cavity and are fixedly connected to the main housing; and A connector is used to connect the cover structure and the structural member, and to fix the cover structure and the structural member together. Wherein, at least one of the cover structure and the structural member is magnetically connected to the connector.

2. The battery device according to claim 1, characterized in that, The connector is provided in the middle region of the cover structure facing the structural member.

3. The battery device according to claim 1, characterized in that, The battery device further includes a battery cell assembly, which is disposed within the receiving cavity; The structural component includes a fixing strap, which is disposed between the battery cell assembly and the cover structure.

4. The battery device according to claim 3, characterized in that, The fixing strap abuts against the side of the battery cell assembly facing the cover structure; The cover structure is electrically insulated from the battery cell assembly.

5. The battery device according to claim 4, characterized in that, The battery cell group includes at least one battery cell column, and the battery cell column includes a plurality of battery cells arranged along a first direction. The fixing strip is laid along the first direction on the side of the battery cell row facing the cover structure.

6. The battery device according to claim 5, characterized in that, Multiple battery cells in the battery cell array are fixedly connected to the fixing strap.

7. The battery device according to claim 3, characterized in that, The number of connectors is multiple, and the multiple connectors are distributed along the length direction of the fixing strap between the fixing strap and the cover structure.

8. The battery device according to claim 7, characterized in that, The fixing strap is divided into a first segment, a second segment, and a third segment of equal length along its length. Wherein, at least some of the connectors are located in the second segment, and the number of connectors located in the second segment is greater than the number of connectors located in the first segment, and the number of connectors located in the second segment is greater than the number of connectors located in the third segment.

9. The battery device according to claim 7, characterized in that, The end faces of the plurality of connectors are flush with the end faces of the cover structure.

10. The battery device according to claim 3, characterized in that, The fixing strap includes: Metal strip; and An insulating strip is disposed on one side of the metal strip facing the battery cell assembly in its thickness direction.

11. The battery device according to claim 10, characterized in that, The insulating strip includes: The body of the molding strip; and A bending element is disposed on at least one side of the pressure strip body in the width direction of the metal strip.

12. The battery device according to claim 11, characterized in that, In the thickness direction of the metal strip, the bending member is located on the side of the pressure strip body opposite to the battery cell assembly.

13. The battery device according to claim 10, characterized in that, In the thickness direction of the metal strip, the connector is disposed on the side of the metal strip facing the cover structure; The connector is provided with a first positioning part on the side facing the metal strip; A second positioning part is provided on the side of the metal strip facing the connector; In this configuration, one of the first positioning part and the second positioning part is a convex structure, and the other is a concave structure. The convex structure can be matched and inserted with the concave structure.

14. The battery device according to claim 13, characterized in that, The connector is glued and fixed to the metal strip.

15. The battery device according to claim 1, characterized in that, The structural components include at least one of beam structures, partitions, protective plates, and cold-rolled plates.

16. The battery device according to any one of claims 1-15, characterized in that, The connector includes a magnet, at least a portion of the surface of which is covered with a magnetic shielding layer.

17. The battery device according to any one of claims 1, 2, and 15, characterized in that, The battery device further includes a battery cell assembly, which is disposed within the receiving cavity; An insulating layer is provided between the cover structure and the battery cell assembly; The connector passes through the insulating layer and is connected to the cover structure and the structural component, respectively.

18. The battery device according to any one of claims 3-14, characterized in that, An insulating layer is provided between the cover structure and the battery cell assembly; The connector passes through the insulating layer and is connected to the cover structure and the structural component, respectively.

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.

Images