Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a box body, a plurality of battery monomers and a limiting assembly, the box body comprises two beam bodies which are oppositely arranged in the first direction. The plurality of single batteries are arranged in the box body, the plurality of single batteries are arranged between the two beam bodies along the first direction, and the single batteries positioned at the two ends of the arrangement direction respectively abut against the two beam bodies; the two ends of the limiting assembly are connected with the two beam bodies respectively so as to limit displacement of the battery monomers in the first direction, the limiting assembly can stretch out and draw back in the first direction, and the insulating part is arranged between the limiting assembly and the battery monomers so as to insulate the limiting assembly and the battery monomers. According to the technical scheme, the length of the limiting assembly can be adjusted when the battery monomer expands and deforms, so that the risk of breakage of the limiting assembly is reduced, and the operation stability of the battery monomer is improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and particularly to a battery device and an electrical device. Background Art

[0002] With the development of new energy technologies, batteries are increasingly widely used, such as in mobile phones, laptops, battery cars, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, and electric tools.

[0003] The development of battery technologies needs to consider multiple design factors simultaneously. How to improve the stability of the operation process of battery devices is a research direction in the field of batteries. Summary of the Utility Model

[0004] In view of the above problems, this application provides a battery device and an electrical device, which can adjust the length of the limiting component when the battery cell expands and deforms, reduce the risk of the limiting component breaking, and improve the stability of the operation of the battery cell.

[0005] In a first aspect, this application provides a battery device, including a box body, a plurality of battery cells, an insulating member, and a limiting component. The box body includes two beam bodies oppositely arranged along a first direction. The plurality of battery cells are arranged in the box body, arranged between the two beam bodies along the first direction, and the battery cells at both ends of the arrangement direction respectively abut against the two beam bodies. The two ends of the limiting component are respectively connected to the two beam bodies to limit the displacement of the battery cells along the first direction, and the limiting component can expand and contract along the first direction. The insulating member is arranged between the limiting component and the battery cells to insulate the limiting component and the battery cells.

[0006] In the technical solution of the embodiment of this application, by setting the box body, components such as battery cells are accommodated therein, providing a stable operating environment for the operation of the battery cells, and reducing the corrosion or damage of the battery cells caused by external impurities and moisture. By arranging a plurality of battery cells stacked along the first direction in the box body, the number of battery cells can be increased, and the energy density of the battery device can be improved. Moreover, by setting the limiting component, the displacement caused by the expansion of the battery cells is restricted, reducing the deformation of the box body caused by the displacement of the battery cells and improving the operating stability of the battery device. Among them, the limiting component can expand and contract along the first direction, and the limiting component can extend with the deformation of the battery cells, reducing the risk of the limiting component breaking during the deformation of the battery cells, thereby reducing the risk of debris generated by the breakage of the limiting component piercing the battery cells and improving the stability of the operation process of the battery device. Setting the insulating member increases the creepage distance between the limiting component and the battery cells and improves the insulation safety performance of the limiting component.

[0007] In some embodiments, the limiting assembly includes a first connecting bar, a second connecting bar, and a connecting member. The first connecting bar is disposed on one side of the battery cell along a second direction, the second direction is perpendicular to the first direction, and the first connecting bar is connected to one of the beam bodies. The second connecting bar is disposed on one side of the battery cell along the second direction, and the second connecting bar is connected to the other beam body. The connecting member is detachably connected to the first connecting bar and the second connecting bar to adjust the position of the second connecting bar relative to the first connecting bar in the first direction. In the above structure, by adjusting the relative positions between the first connecting bar and the second connecting bar, the length of the limiting assembly extending in the first direction is controlled. The connecting member can limit the relative displacement between the first connecting bar and the second connecting bar, thereby stably connecting the first connecting bar and the second connecting bar, so that the limiting assembly can impose a certain limitation on the expansion deformation of the battery cell.

[0008] In some embodiments, the insulating member includes a first portion disposed between the first connecting bar and the battery cell, and a second portion disposed between the second connecting bar and the battery cell. In the above structure, by providing the insulating member, the creepage distance between the first connecting bar and the second connecting bar and the battery cell is increased, and the insulation safety performance of the limiting assembly is improved.

[0009] In some embodiments, the first portion includes an insulating bottom plate and an insulating side plate. The insulating bottom plate is disposed on the side of the first connecting bar facing the battery cell. The insulating side plate is connected to one side of the insulating bottom plate along a third direction. The third direction is perpendicular to the second direction and the first direction in pairs. The insulating side plate and the insulating bottom plate enclose a receiving groove for receiving the first connecting bar. In the above structure, the insulating bottom plate isolates the direct contact between the first connecting bar and the battery cell. On the one hand, the insulating side plate restricts the displacement of the first connecting bar along the third direction, and on the other hand, increases the creepage distance between the first connecting bar and the battery cell.

[0010] In some embodiments, there are multiple limiting assemblies, and the multiple limiting assemblies are arranged at intervals along the third direction. The third direction is perpendicular to the second direction and the first direction in pairs. In the above structure, by providing multiple limiting assemblies, the positions of the battery device at multiple positions along the third direction are limited, and the overall force balance of the box body is improved.

[0011] In some embodiments, a plurality of battery cells are arranged in a first direction to form a battery row, and the number of battery rows is plural. The plurality of battery rows are arranged in a third direction. The plurality of limiting components include a first sub-limiting member and a second sub-limiting member that are spaced apart in the third direction. The first sub-limiting member is provided corresponding to any one battery row, and the second sub-limiting member is disposed between two adjacent battery rows and abuts against the two adjacent battery rows respectively. In the third direction, the width of the second sub-limiting member is greater than the width of the first sub-limiting member. In the above structure, limiting components with different widths are provided. By arranging the limiting components in the region with larger deformation, the pulling force on the region with larger deformation of the battery cell is increased, and the force balance of each part of the box body is improved. Moreover, the second sub-limiting member widens the width of the limiting component that needs to bear the deformation limitation of two battery rows, increasing the limitation on the region with larger pulling force on the battery cell and improving the force balance of each part of the box body.

[0012] In some embodiments, the limiting component further includes an induction component and a warning device. The induction component is connected to the limiting component, and the induction component is used to sense the pulling force of the limiting component. The warning device is electrically connected to the induction component, and the warning device gives an alarm when the induction component senses that the pulling force of the limiting component reaches a threshold value. In the above structure, by providing the induction component, the pulling force of the limiting component is detected, and an alarm is given when the pulling force exceeds the threshold value, reducing the risk of breakage of the first connecting bar or the second connecting bar due to excessive force and improving the operating stability of the battery device.

[0013] In some embodiments, the battery device further includes a battery management system. The battery management system is electrically connected to the battery cells, and the induction component is electrically connected to the battery management system. In the above structure, setting the battery management system can monitor and adjust the operating conditions of the battery cells, improving the operating stability of the battery device. Moreover, the induction component is connected to the battery management system, and the stress condition of the induction component can be pre-warned through the battery management system, improving the monitoring of the stress condition of the limiting component.

[0014] In some embodiments, a plurality of first connection holes arranged in the first direction are provided on the first connecting bar, and at least one second connection hole is provided on the second connecting bar. The connecting member further includes a fastener. The fastener is used to selectively pass through one of the first connection holes and the second connection hole to connect the first connecting bar and the second connecting bar. In the above structure, by providing a plurality of first connection holes on the first connecting bar, the relative positions of the first connecting bar and the second connecting bar can be adjusted according to the expansion and deformation conditions of the battery cells, so as to accurately control the pulling force for limiting the battery cells. While limiting the expansion of the battery cells, the risk of breakage of the first connecting bar and the second connecting bar is reduced.

[0015] In some embodiments, one end of the first connecting bar facing the second connecting bar is provided with a plurality of card slots. The plurality of card slots are arranged at intervals in a first direction. The connecting member further includes an elastic member and a clamping block. The elastic member is connected to the second connecting bar, and the elastic member can expand and contract along a third direction. The third direction is perpendicular to the second direction and the first direction pairwise. The clamping block is connected to the elastic member, and the clamping block can be selectively embedded in one of the plurality of card slots. In the above structure, the first connecting bar and the second connecting bar are clamped by arranging the card slots to accommodate the clamping block. The elastic member is arranged to push the clamping block towards the card slot, making the connection between the clamping block and the card slot more stable. And when the first connecting bar and the second connecting bar are subjected to a tensile force, the clamping block can be pulled out of the card slot by stretching, facilitating the movement of the first connecting bar relative to the second connecting bar, thereby automatically adjusting the length of the limiting component extending in the first direction.

[0016] In some embodiments, the groove wall of the card slot is inclined in the first direction, and the surface of the clamping block facing the groove wall is inclined in the first direction. By arranging the groove wall of the card slot to be inclined, it is convenient for the clamping block to move out of the card slot, improving the adjustment efficiency.

[0017] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiments, and the battery device is used to provide electrical energy.

[0018] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the drawings.

[0020] Figure 1 Structural schematic diagram of a vehicle provided in some embodiments of the present application;

[0021] Figure 2 Explosion schematic diagram of a battery device provided in some embodiments of the present application;

[0022] Figure 3 Explosion schematic diagram of a battery cell provided in some embodiments of the present application;

[0023] Figure 4 Top view schematic diagram of a battery device provided in some embodiments of the present application;

[0024] Figure 5 Structural schematic diagram of a limiting component provided in some embodiments of the present application;

[0025] Figure 6Partial structural schematic diagram of the insulating part provided by some embodiments of the present application;

[0026] Figure 7 Structural schematic diagram of the battery device provided by some other embodiments of the present application;

[0027] Figure 8 Structural schematic diagram of the first connection bar provided by some embodiments of the present application;

[0028] Figure 9 Partial structural schematic diagram of the limiting component provided by some embodiments of the present application;

[0029] Figure 10 Partial structural schematic diagram of the limiting component provided by some other embodiments of the present application.

[0030] Detailed description of reference numerals

[0031] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 5. Box body; 5a. First box body part; 5b. Second box body part; 5c. Accommodating space; 501. Beam body; 6. Battery cell; 10. Electrode assembly; 20. Shell; 25. Electrode terminal; 30. End cover; 40. Outer shell; 7. Limiting component; 701. First connection bar; 702. Second connection bar; 703. Connecting piece; 704. Insulating part; 705. First part; 706. Second part; 707. Insulating bottom plate; 708. Insulating side plate; 709. First sub-limiting piece; 710. Second sub-limiting piece; 711. Induction component; 712. Warning device; 713. First connection hole; 714. Second connection hole; 715. Fastening piece; 716. Card slot; 717. Elastic piece; 718. Clamping block; 719. First groove; 720. Second groove; X. First direction; Y. Second direction; Z. Third direction. Detailed implementation manners

[0032] Hereinafter, embodiments of the technical solutions of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and thus are only examples and should not be used to limit the protection scope of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise clearly and specifically defined.

[0035] Reference to "embodiments" in this document means that the specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0037] In the description of the embodiments of the present application, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0041] In the embodiments of this application, the same reference numerals represent the same components. And for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings in the embodiments of this application, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0042] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism but also the case of approximately parallelism as conventionally understood in engineering; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity but also the case of approximately perpendicularity as conventionally understood in engineering. Exemplarily, if the included angle between two directions is 85° - 95°, the two directions can be considered perpendicular; if the included angle between two directions is 0° - 5°, the two directions can be considered parallel.

[0043] The term "a plurality of" as used in this application means two or more (including two).

[0044] In the embodiments of this application, the battery cell can be a secondary battery, and a secondary battery refers to a battery cell that can be activated by charging after discharging to continue use.

[0045] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of this application are not limited thereto.

[0046] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) shuttle between the positive electrode and the negative electrode for insertion and extraction. The separator is disposed between the positive electrode and the negative electrode, which can prevent short circuit between the positive and negative electrodes and at the same time allow active ions to pass through.

[0047] The technical solutions described in the embodiments of this application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0048] The electrical equipment can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, a planer, etc. The embodiments of the present application do not impose special restrictions on the above electrical equipment.

[0049] During the assembly process of the battery cell, structural adhesive and steel pressing strips are usually used for connection and limiting. Due to the tolerance of the steel pressing strip, the initial force on the steel pressing strip is uneven, resulting in exceeding the force threshold of the steel pressing strip, so that the steel pressing strip breaks. In addition, the length of the steel pressing strip cannot be adjusted. During the operation of the battery cell, the battery cell expands continuously, and the steel pressing strip will break due to the force. As a result, the structural strength of the box body is insufficient, the structure fails, and there is a safety risk. Moreover, after the steel pressing strip breaks, it will wear and generate debris with structures such as bolts. When the debris falls between the battery cells, it is easy to pierce the insulating blue film wrapped outside the shell, resulting in insulation failure. Therefore, how to make the force on the steel pressing strip uniform and absorb the displacement caused by the aging of the battery core has become a problem to be solved.

[0050] In view of this, the embodiments of the present application provide a battery device. By providing a box body to accommodate components such as battery cells therein, a stable operating environment is provided for the operation of the battery cells, and corrosion or damage to the battery cells caused by external impurities and moisture is reduced. A plurality of battery cells stacked along a first direction are arranged in the box body, which can increase the number of battery cells and improve the energy density of the battery device. Moreover, a limiting component is provided to limit the displacement caused by the expansion of the battery cells, reduce the deformation of the box body caused by the displacement of the battery cells, and improve the operating stability of the battery device. Among them, the limiting component can expand and contract along the first direction, and the limiting component can extend a certain amount along with the deformation of the battery cells, reducing the risk of the limiting component breaking during the deformation of the battery cells, thereby reducing the risk of the debris generated by the breakage of the limiting component piercing the insulating blue film wrapped outside the battery cell, and at the same time maintaining the limiting effect on the battery cells, improving the stability of the battery device during operation.

[0051] For the convenience of description in the following embodiments, the electrical equipment is taken as an example of a vehicle for illustration.

[0052] Figure 1 It is a schematic structural diagram of a vehicle provided by some embodiments of the present application.

[0053] As shown in Figure 1, a battery device 2 is provided inside the vehicle 1, and the battery device 2 can be arranged at the bottom, head or tail of the vehicle 1. The battery device 2 can be used to supply power to the vehicle 1. For example, the battery device 2 can serve as the operating power source of the vehicle 1.

[0054] The vehicle 1 may further include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4. For example, it is used for the working power requirements during the start-up, navigation and driving of the vehicle 1.

[0055] In some embodiments of the present application, the battery device 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0056] Figure 2 It is an explosion schematic diagram of the battery provided for some embodiments of the present application. As Figure 2 shown, the battery device 2 includes a box body 5 and battery cells 6, and the battery cells 6 are accommodated in the box body 5. The battery cell 6 can be the smallest unit that makes up the battery device 2.

[0057] The box body 5 is used to accommodate the battery cells 6, and the box body 5 can have various structures. In some embodiments, the box body 5 may include a first box body part 5a and a second box body part 5b. The first box body part 5a and the second box body part 5b are covered with each other, and the first box body part 5a and the second box body part 5b jointly define an accommodation space 5c for accommodating the battery cells 6. The second box body part 5b can be a hollow structure with one end open, and the first box body part 5a is a plate-like structure. The first box body part 5a covers the opening side of the second box body part 5b to form the box body 5 with the accommodation space 5c; both the first box body part 5a and the second box body part 5b can also be hollow structures with one side open, and the opening side of the first box body part 5a covers the opening side of the second box body part 5b to form the box body 5 with the accommodation space 5c. Of course, the first box body part 5a and the second box body part 5b can have various shapes, such as a cylinder, a cuboid, etc.

[0058] To improve the sealing performance after the connection between the first box body part 5a and the second box body part 5b, a sealing member, such as sealant, sealing ring, etc., can also be provided between the first box body part 5a and the second box body part 5b.

[0059] Assume that the first box body part 5a covers the top of the second box body part 5b. The first box body part 5a can also be called the upper box cover, and the second box body part 5b can also be called the lower box body.

[0060] In the battery device 2, the battery cell 6 can be one or multiple. If there are multiple battery cells 6, they can be connected in series, parallel, or in a combined series-parallel connection, where a combined series-parallel connection means that among the multiple battery cells 6, there are both series and parallel connections.

[0061] The multiple battery cells 6 can be directly connected in series, parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 6 is accommodated in the box body 5; of course, it can also be that multiple battery cells 6 are first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 5.

[0062] Figure 3 It is a schematic exploded view of the battery cell provided by some embodiments of this application.

[0063] As Figure 3 shown, in some embodiments, the battery cell 6 includes a housing 40 and an electrode assembly 10 accommodated in the housing 40.

[0064] The electrode assembly 10 includes a positive electrode and a negative electrode. During the charging and discharging process of the battery cell 6, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. Optionally, the electrode assembly 10 further includes a separator disposed between the positive electrode and the negative electrode, and the separator can reduce the risk of short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0065] The housing 40 is used to encapsulate components such as the electrode assembly 10 and the electrolyte. The housing 40 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite housing 40), or an aluminum-plastic film, etc.

[0066] In some embodiments, the housing 40 includes a housing body 20 and an end cap 30, the housing body 20 has an opening, and the end cap 30 is used to cover the opening.

[0067] In some embodiments, the battery cell 6 further includes an electrolyte accommodated in the housing 40. The electrolyte plays a role in conducting ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid.

[0068] In some embodiments, the battery cell 6 includes an electrode terminal 25. The electrode terminal 25 is electrically connected to the electrode assembly 10 for outputting or inputting the electrical energy of the battery cell 6.

[0069] Please refer to Figures 2 to 4 , Figure 2 which is an exploded view of the battery device provided by some embodiments of this application, Figure 3 which is an exploded view of the battery cell provided by some embodiments of this application, Figure 4 which is a top view of the battery device provided by some embodiments of this application.

[0070] As shown in the figure, the battery device 2 provided in the embodiment of the present application includes a box body 5, a plurality of battery cells 6, and a limiting component 7. The box body 5 includes two beam bodies 501 oppositely arranged along the first direction X. A plurality of battery cells 6 are arranged in the box body 5. The plurality of battery cells 6 are arranged between the two beam bodies 501 along the first direction X, and the battery cells 6 located at both ends of the arrangement direction respectively abut against the two beam bodies 501. Both ends of the limiting component 7 are respectively connected to the two beam bodies 501 to limit the displacement of the battery cells 6 along the first direction X. The limiting component 7 can expand and contract along the first direction X. An insulating member 704 is arranged between the limiting component 7 and the battery cells 6 to insulate the limiting component 7 and the battery cells 6.

[0071] The two beam bodies 501 in the box body 5 can be limiting beams or side beams of the box body 5. The first direction X can be the thickness direction of the battery cells 6. The thickness direction refers to the direction in which the electrode plates are stacked or the radial direction in which the electrode plates are wound. Generally, the direction in which the battery cells 6 expand the most is the thickness direction.

[0072] Exemplarily, the limiting component 7 can be an elastic strip structure. The main function of the limiting component 7 is to limit the displacement of the battery cells 6 along the first direction X. Since the battery may expand due to internal chemical reactions or temperature changes during charging and discharging, the limiting component 7 can prevent the displacement of the battery cells 6 caused by this expansion, thereby avoiding the deformation of the box body 5 due to the displacement of the battery cells 6. The limiting component 7 can expand and contract along the first direction X. When the battery cells 6 expand, the limiting component 7 can extend a certain amount along with the deformation of the battery, rather than rigidly preventing the expansion of the battery. The risk of the limiting component 7 breaking during the deformation of the battery cells 6 is reduced, thereby avoiding the situation that the debris generated after the limiting component 7 breaks may pierce the battery cells 6, and further improving the stability of the battery device 2 during operation.

[0073] In the technical solution of the embodiment of the present application, by providing the box body 5 to accommodate components such as the battery cell 6 therein, a stable operating environment is provided for the operation of the battery cell 6, and corrosion or damage to the battery cell 6 caused by external impurities and moisture is reduced. By arranging a plurality of battery cells 6 stacked in the first direction X in the box body 5, the number of battery cells 6 can be increased, and the energy density of the battery device 2 can be improved. Moreover, by providing the limiting component 7 to limit the displacement caused by the expansion of the battery cell 6, deformation of the box body 5 caused by the displacement of the battery cell 6 is reduced, and the operating stability of the battery device 2 is improved. Among them, the limiting component 7 can expand and contract in the first direction X, and the limiting component 7 can extend by a certain amount along with the deformation of the battery cell 6, reducing the risk of the limiting component 7 breaking during the deformation of the battery cell 6, thereby reducing the risk of debris generated by the breakage of the limiting component 7 piercing the outer insulating blue film of the battery cell 6, and at the same time maintaining the limiting effect on the battery cell 6, improving the stability of the battery device 2 during operation. Providing the insulating member 704 increases the creepage distance between the limiting component 7 and the battery cell 6, improving the insulation safety performance of the limiting component 7.

[0074] As Figure 4 and Figure 5 shown, in some embodiments of the present application, the limiting component 7 includes a first connecting bar 701, a second connecting bar 702, and a connecting member 703. The first connecting bar 701 is arranged on one side of the battery cell 6 along the second direction Y, the second direction Y is perpendicular to the first direction X, and the first connecting bar 701 is connected to one of the beam bodies 501. The second connecting bar 702 is arranged on one side of the battery cell 6 along the second direction Y, and the second connecting bar 702 is connected to another beam body 501. The connecting member 703 is detachably connected to the first connecting bar 701 and the second connecting bar 702 to adjust the position of the second connecting bar 702 relative to the first connecting bar 701 in the first direction X.

[0075] Exemplarily, the first end of the first connecting bar 701 is connected to the first beam body 501, and the first end of the second connecting bar 702 is connected to the second beam body 501. The second ends of the first connecting bar 701 and the second connecting bar 702 are connected to each other. The connecting member 703 being detachably connected to the first connecting bar 701 and the second connecting bar 702 means that the first connecting bar 701 and the second connecting bar 702 can be relatively fixedly connected through the connecting member 703, or can be disconnected by removing the connecting member 703 to move.

[0076] By providing the first connecting bar 701 and the second connecting bar 702 and adjusting the relative positions therebetween, the length of the limiting component 7 extending along the first direction X can be controlled. This design enables the limiting component 7 to adapt to battery cells 6 of different sizes or degrees of expansion. The function of the connecting member 703 is to stably connect the first connecting bar 701 and the second connecting bar 702, thereby ensuring that the limiting component 7 can provide sufficient support and restraint when the battery cell 6 expands. Since the connecting member 703 is detachable, this facilitates the adjustment of the limiting component 7 during the installation, maintenance, or replacement of the battery cell 6.

[0077] As Figure 5 and Figure 6 shown, in some embodiments of the present application, the insulating member 704 includes a first portion 705 disposed between the first connecting bar 701 and the battery cell 6, and a second portion 706 disposed between the second connecting bar 702 and the battery cell 6.

[0078] Optionally, the first portion 705 and the second portion 706 are connected to each other. The first portion 705 and the second portion 706 are an integrally formed structure. Exemplarily, materials such as polyethylene (PE), polystyrene (PS), rubber, polyvinyl chloride (PVC), polyethylene, etc. can be used to manufacture the insulating member 704. The insulating member 704 can be wrapped around the first connecting bar 701 and the second connecting bar 702. Alternatively, an insulating paste can be sprayed on the surfaces of the first connecting bar 701 and the second connecting bar 702, and after drying and forming, the insulating member 704 is formed.

[0079] The first portion 705 of the insulating member 704 is disposed between the first connecting bar 701 and the battery cell 6, maintaining sufficient electrical isolation between the first connecting bar 701 and the battery cell 6. The second portion 706 of the insulating member 704 is disposed between the second connecting bar 702 and the battery cell 6, and similar to the first portion 705, maintaining sufficient electrical isolation between the second connecting bar 702 and the battery cell 6.

[0080] The creepage distance is the shortest distance between two conductive parts measured along the insulating surface. By providing the insulating member 704, especially between the first connecting bar 701, the second connecting bar 702 and the battery cell 6, this distance is effectively increased, thereby reducing the risk of failures caused by electrical discharges (such as arcs).

[0081] The use of the insulating member 704 improves the insulation safety performance of the limiting component 7 and even the entire battery device 2. In the battery device 2, electrical safety is crucial because any electrical failure may damage the battery cell 6, surrounding components, and even the entire system.

[0082] In the above structure, by providing the insulating member 704, the creepage distance between the first connecting bar 701 and the second connecting bar 702 and the battery cell 6 is increased, and the insulation safety performance of the limiting component 7 is improved.

[0083] As Figure 5 and Figure 6 shown, in some embodiments of the present application, the first part 705 includes an insulating bottom plate 707 and an insulating side plate 708. The insulating bottom plate 707 is disposed on the side of the first connecting bar 701 facing the battery cell 6. The insulating side plate 708 is connected to one side of the insulating bottom plate 707 along the third direction Z, and the third direction Z is perpendicular to the second direction Y and the first direction X pairwise. The insulating side plate 708 and the insulating bottom plate 707 enclose a receiving groove for receiving the first connecting bar 701. Optionally, the second part 706 has the same structure as the first part 705.

[0084] The insulating bottom plate 707 is arranged on the side of the first connecting bar 701 facing the battery cell 6. Its main function is to isolate the direct contact between the first connecting bar 701 and the battery cell 6, thereby preventing current or voltage from being transmitted through an unexpected path and ensuring electrical safety. The insulating side plate 708 restricts the displacement of the first connecting bar 701 along the third direction Z. If the first connecting bar 701 moves in the third direction Z due to vibration, temperature change or other external factors, the insulating side plate 708 will provide a physical barrier to prevent its excessive movement, thereby maintaining the stability of the limiting component 7.

[0085] The insulating side plate 708 not only restricts the displacement of the first connecting bar 701, but also increases the creepage distance between the first connecting bar 701 and the battery cell 6 through its extended portion. The creepage distance is the shortest path along which current may flow along the insulating surface. Increasing this distance helps to reduce the risk of electrical discharge (such as arc), further improving the electrical safety performance.

[0086] In the above structure, the insulating bottom plate 707 isolates the direct contact between the first connecting bar 701 and the battery cell 6. The insulating side plate 708, on the one hand, restricts the displacement of the first connecting bar 701 along the third direction Z, and on the other hand, increases the creepage distance between the first connecting bar 701 and the battery cell 6.

[0087] In some embodiments of the present application, there are multiple limiting components 7, and the multiple limiting components 7 are arranged at intervals along the third direction Z. The third direction Z is perpendicular to the second direction Y and the first direction X pairwise.

[0088] Optionally, the first connecting bar 701 and the second connecting bar 702 are connected together by means such as hinging, sliding connection or other connection means with adjustable length, forming an assembly that can expand and contract along the first direction X. The main function of the limiting assembly 7 is to adapt to the dimensional changes of the battery device 2 in the first direction X, while providing necessary limiting and support. By adjusting the length of the limiting assembly 7, the position of the battery cell 6 in this direction can be precisely controlled, thereby ensuring the structural stability and force balance of the entire battery device 2.

[0089] In the battery device 2, a plurality of telescopic bars are arranged at intervals along the third direction Z. They not only work independently but also cooperate with each other to jointly support and limit the battery cell 6 or the battery module.

[0090] By providing a plurality of limiting assemblies 7, the force exerted on the battery device 2 in the third direction Z can be more effectively dispersed. When the battery device 2 is subjected to external pressure or vibration, these limiting assemblies 7 can absorb and disperse these forces, thereby reducing the impact on a single battery cell 6 or module and improving the force balance and durability of the entire box body 5.

[0091] The arrangement of a plurality of limiting assemblies 7 not only enhances the structural stability of the battery device 2 in the third direction Z, but also helps to improve the rigidity and anti-deformation ability of the entire battery device 2 in multiple directions.

[0092] Optionally, due to the adjustable length characteristic of the limiting assembly 7, they can adapt to battery cells 6 or modules of different sizes and shapes, as well as different installation and working environment requirements.

[0093] In the above structure, by providing a plurality of limiting assemblies 7 to limit multiple positions of the battery device 2 along the third direction Z, the overall force balance of the box body 5 is improved.

[0094] In some embodiments of the present application, a plurality of battery cells are arranged in a battery row along the first direction, the number of battery rows is multiple, and multiple battery rows are arranged along the third direction. The plurality of limiting assemblies include a first sub-limiting member and a second sub-limiting member arranged at intervals along the third direction. The first sub-limiting member 709 is provided corresponding to any one battery row, and the second sub-limiting member 710 is arranged between two adjacent battery rows and respectively abuts against two adjacent battery rows. Along the third direction Z, the width of the second sub-limiting member 710 is greater than the width of the first sub-limiting member 709.

[0095] Along the third direction Z, for example, the width of the second sub-limiting member 710 is W1, and the width of the first sub-limiting member 709 is W2, and W1 > W2.

[0096] Optionally, the number of the second sub-limiting members 710 is plural. The second sub-limiting members 710 disposed in the middle of the box body 5 have a larger width along the third direction Z, and the second sub-limiting members 710 disposed near the edge of the box body 5 have a smaller width along the third direction Z.

[0097] The two first sub-limiting members 709 disposed opposite to each other along the third direction Z are located on both sides of the box body 5, and limit and support the battery cells 6. Since they are located at the edge of the box body 5, they can effectively prevent the battery cells 6 or the module from moving excessively in the third direction Z.

[0098] The second sub-limiting members 710 are disposed between the two first sub-limiting members 709, and their width along the third direction Z is greater than the width of the first sub-limiting members 709. This design enables the second sub-limiting members 710 to cover the areas where the battery cells 6 may have large deformations, thereby providing stronger tensile force and support. Since the battery cells 6 may have uneven expansion deformations during the charging and discharging processes, especially in the middle region may be more obvious. Therefore, by increasing the width of the second sub-limiting members 710 located in the middle of the box body 5, the tensile force on this region can be increased, which helps to balance the force on the entire box body 5 in the third direction Z.

[0099] In the above structure, by increasing the width of the telescopic strip located in the middle of the box body 5, the tensile force on the region with large deformations of the battery cells 6 is increased, and the force balance of each part of the box body 5 is improved. Moreover, the second sub-limiting members 710 widen the width of the limiting component that needs to bear the deformation limits of two battery rows, increasing the limitation on the region with large tensile force on the battery cells 6, and improving the force balance of each part of the box body 5.

[0100] As Figure 7 shown, in some embodiments of the present application, the limiting component 7 further includes an induction component 711 and a warning device 712. The induction component 711 is connected to the first connecting strip 701, and the induction component 711 is used to sense the tensile force of the first connecting strip 701. The warning device 712 is electrically connected to the induction component 711, and the warning device 712 gives an alarm when the induction component 711 senses that the tensile force of the first connecting strip 701 reaches the threshold value.

[0101] Exemplarily, the induction component 711 can be a pressure sensor or a displacement sensor.

[0102] The induction component 711 is connected to the limiting component 7, which means that it can directly monitor the tensile force borne by the limiting component 7. The main function of the induction component 711 is to monitor the tensile force condition of the limiting component 7 in real time. Through high-precision sensors or other induction technologies, it can accurately capture the changes in the tensile force and convert this information into electrical signals for transmission.

[0103] Optionally, the warning device 712 can be an audible alarm, an optoelectronic alarm, etc. The warning device 712 is electrically connected to the sensing component 711, which means it can receive the tensile force information transmitted by the sensing component 711. When the sensing component 711 senses that the tensile force of the first connecting bar 701 reaches a preset threshold, the warning device 712 will immediately activate the warning function. This threshold is determined comprehensively based on factors such as the design requirements, material properties, and safety standards of the battery device 2.

[0104] In the above structure, by setting the sensing component 711 to detect the tensile force of the limiting component 7 and give a warning when the tensile force exceeds the threshold, the relative positions of the first connecting bar 701 and the second connecting bar 702 can be adjusted in time, reducing the risk of the first connecting bar 701 or the second connecting bar 702 breaking due to excessive force, and improving the operating stability of the battery device 2.

[0105] In some embodiments of the present application, the battery device 2 further includes a battery management system, the battery management system is electrically connected to the battery cell 6, and the sensing component 711 is electrically connected to the battery management system.

[0106] The battery management system can monitor key parameters such as the voltage, current, and temperature of the battery cell 6 in real time, and adjust and optimize the operating conditions of the battery cell 6 according to these parameters. This helps to ensure that the battery cell 6 works in the best state, extends its service life, and improves the operating stability of the entire battery device 2. The battery management system has warning and protection functions. When abnormal conditions occur in the battery cell 6, such as overcharging, over-discharging, too high or too low temperature, etc., the battery management system will immediately issue a warning signal and take corresponding protection measures, such as cutting off the power supply, adjusting the charging rate, etc., to prevent the battery cell 6 from being damaged or causing a safety accident.

[0107] The sensing component 711 and the battery management system achieve data transmission through electrical connection. The sensing component 711 converts the monitored force condition of the limiting component 7 into an electrical signal and transmits it to the battery management system for processing and analysis. The battery management system can monitor and give an early warning of the force condition of the limiting component 7 according to the data transmitted by the sensing component 711. When the force condition exceeds the preset threshold, the battery management system will issue a warning signal to remind the operator to take measures to intervene in time, reducing the damage to the limiting component 7 or the battery cell 6 due to excessive force.

[0108] In the above structure, setting the battery management system can monitor and adjust the operating conditions of the battery cell 6, improving the operating stability of the battery device 2. Moreover, the sensing component 711 is connected to the battery management system, and the force condition of the sensing component 711 can be warned through the battery management system, improving the monitoring of the force condition of the limiting component 7.

[0109] As Figure 8 and Figure 9 shown, in some embodiments of the present application, a plurality of first connection holes 713 arranged along the first direction X are provided on the first connection bar 701, at least one second connection hole 714 is provided on the second connection bar 702, and the connecting member 703 further includes a fastening member 715. The fastening member 715 is used to selectively pass through one of the first connection holes 713 and the second connection hole 714 to connect the first connection bar 701 and the second connection bar 702. Optionally, the number of the second connection holes 714 is multiple, and the multiple second connection holes 714 are arranged at intervals along the first direction.

[0110] A plurality of first connection holes 713 arranged along the first direction X are provided on the first connection bar 701. These connection holes allow the fastening member 715 to be fixed at different positions, thus providing the possibility of adjusting the relative positions of the first connection bar 701 and the second connection bar 702. At least one second connection hole 714 is provided on the second connection bar 702 for cooperating with the first connection hole 713 to achieve connection through the fastening member 715. The fastening member 715 (such as a bolt, a nut, etc.) is used to pass through the first connection hole 713 and the second connection hole 714 to firmly connect the first connection bar 701 and the second connection bar 702 together.

[0111] Since a plurality of first connection holes 713 are provided on the first connection bar 701, the most suitable connection hole position can be selected for fixing according to the actual expansion and deformation conditions of the battery cell 6. This design enables the limiting component 7 to flexibly adapt to the deformation of the battery cell 6, ensuring that while restricting the expansion, excessive pressure is not exerted on the battery cell 6 or the connecting member 703. By adjusting the relative positions of the first connection bar 701 and the second connection bar 702, the limiting tension on the battery cell 6 can be precisely controlled. This helps to balance the stress condition of the battery cell 6 during the expansion process and reduce the risk of fracture caused by uneven stress.

[0112] As Figure 10 shown, in some embodiments of the present application, a plurality of card slots 716 are provided at one end of the first connection bar 701 facing the second connection bar 702. The plurality of card slots 716 are arranged at intervals along the first direction X. The connecting member 703 further includes an elastic member 717 and a clamping block 718. The elastic member 717 is connected to the second connection bar 702, and the elastic member 717 can expand and contract along the third direction Z. The third direction Z is perpendicular to the second direction Y and the first direction X pairwise. The clamping block 718 is connected to the elastic member 717, and the clamping block 718 can be selectively embedded in one of the plurality of card slots 716. Exemplarily, the clamping block 718 is connected to one end of the elastic member 717 far from the second connection bar 702.

[0113] Optionally, a receiving groove is provided on the second connecting strip 702 for receiving the elastic member 717 and the clamping block 718. One end of the first connecting strip 701 facing the second connecting strip 702 is provided with a plurality of card slots 716, and these card slots 716 are arranged at intervals along the first direction X. The design of the card slots 716 is for receiving the clamping block 718, so as to realize the clamping connection between the first connecting strip 701 and the second connecting strip 702. The elastic member 717 is connected to the second connecting strip 702 and can expand and contract along the third direction Z. The function of the elastic member 717 is to provide sufficient elastic force to push the clamping block 718 into the card slot 716 to ensure a stable connection between the clamping block 718 and the card slot 716. The clamping block 718 is connected to the elastic member 717, and its shape and size match those of the card slot 716 so that it can be smoothly inserted into and removed from the card slot 716.

[0114] By providing the card slots 716 and the clamping blocks 718, a stable clamping connection is achieved between the first connecting strip 701 and the second connecting strip 702. This connection method is not only simple and reliable, but also convenient for installation and disassembly.

[0115] Exemplarily, the clamping block 718 is installed in the first groove 719 during initial assembly. When the battery cell 6 expands to form a tensile force on the first connecting strip 701 and the second connecting strip 702, the first connecting strip 701 transmits the tensile force to the elastic member 717. The elastic member 717 stretches and pulls the clamping block 718 out of the first groove 719 and retracts into the receiving groove. As the first connecting strip 701 moves relative to the second connecting strip 702, the length of the telescopic strip increases and the tensile force gradually decreases. The reduced tensile force of the elastic member 717 is converted into a thrust force on the clamping block 718, and the clamping block 718 moves to the position of the second groove 720 and is pushed into the second groove 720 by the elastic member 717.

[0116] In the above structure, by providing a plurality of card slots 716 to receive the clamping blocks 718, the first connecting strip 701 and the second connecting strip 702 are clamped. The elastic member 717 is provided to push the clamping block 718 into the card slot 716 to make the connection between the clamping block 718 and the card slot 716 more stable. And when the first connecting strip 701 and the second connecting strip 702 are subjected to a tensile force, it can stretch to pull the clamping block 718 out of one card slot 716 and move it to another card slot 716, which is convenient for the first connecting strip 701 to move relative to the second connecting strip 702, so as to automatically adjust the length of the limiting component 7 extending along the first direction X.

[0117] In some embodiments of the present application, the groove wall of the card slot 716 is inclined along the first direction X, and the surface of the clamping block 718 facing the groove wall is inclined along the first direction X.

[0118] The groove wall of the card slot 716 is inclined along the first direction X. When the first connecting bar 701 moves relative to the second connecting bar 702, the clamping block 718 can more easily slide out of the card slot 716 along the inclined groove wall instead of being blocked by the groove wall.

[0119] The surface of the clamping block 718 facing the groove wall is also inclined along the first direction X. This design further facilitates the smooth removal of the clamping block 718 from the card slot 716. When the clamping block 718 is subjected to a pulling force, its inclined surface will interact with the inclined groove wall of the card slot 716 to generate a thrust along the first direction X, helping the clamping block 718 to quickly disengage from the card slot 716.

[0120] The inclined groove wall of the card slot 716 and the surface of the clamping block 718 enable the clamping block 718 to more easily move out of the card slot 716 when subjected to a pulling force, thereby improving the adjustment efficiency of the limiting component 7 in extending or shortening its length along the first direction X. The inclined design also reduces the friction between the clamping block 718 and the groove wall of the card slot 716 and reduces the risk of wear and damage caused by long-term friction.

[0121] Inclining the groove wall of the card slot 716 facilitates the removal of the clamping block 718 from the card slot 716 and improves the adjustment efficiency.

[0122] In some alternative embodiments, the battery device 2 includes a box body 5, a plurality of battery cells 6, and a limiting assembly 7. The box body 5 includes two beam bodies 501 oppositely arranged along a first direction X. The plurality of battery cells 6 are disposed in the box body 5, and the plurality of battery cells 6 are arranged between the two beam bodies 501 along the first direction X, and the battery cells 6 located at both ends of the arrangement direction respectively abut against the two beam bodies 501. Both ends of the limiting assembly 7 are respectively connected to the two beam bodies 501 to limit the displacement of the battery cells 6 along the first direction X, and the limiting assembly 7 can expand and contract along the first direction X. An insulating member 704 is disposed between the limiting assembly 7 and the battery cells 6 to insulate the limiting assembly 7 and the battery cells 6. The limiting assembly 7 includes a first connecting strip 701, a second connecting strip 702, and a connecting member 703. The first connecting strip 701 is disposed on one side of the battery cell 6 along a second direction Y, the second direction Y is perpendicular to the first direction X, and the first connecting strip 701 is connected to one of the beam bodies 501. The second connecting strip 702 is disposed on one side of the battery cell 6 along the second direction Y, and the second connecting strip 702 is connected to the other beam body 501. The connecting member 703 is detachably connected to the first connecting strip 701 and the second connecting strip 702 to adjust the position of the second connecting strip 702 relative to the first connecting strip 701 in the first direction X. The insulating member 704 includes a first portion 705 disposed between the first connecting strip 701 and the battery cell 6, and a second portion 706 disposed between the second connecting strip 702 and the battery cell 6. The first portion 705 includes an insulating bottom plate 707 and an insulating side plate 708. The insulating bottom plate 707 is disposed on the side of the first connecting strip 701 facing the battery cell 6. The insulating side plate 708 is connected to one side of the insulating bottom plate 707 along a third direction Z, and the third direction Z, the second direction Y, and the first direction X are perpendicular to each other in pairs. The insulating side plate 708 and the insulating bottom plate 707 enclose a receiving groove for receiving the first connecting strip 701. There are a plurality of limiting assemblies 7, and the plurality of limiting assemblies 7 are spaced apart along the third direction Z. One end of the first connecting strip 701 facing the second connecting strip 702 is provided with a plurality of card slots 716, and the plurality of card slots 716 are spaced apart along the first direction X. The connecting member 703 further includes an elastic member 717 and a clamping block 718. The elastic member 717 is connected to the second connecting strip 702, and the elastic member 717 can expand and contract along the third direction Z. The clamping block 718 is connected to the elastic member 717. The clamping block 718 can be selectively embedded in one of the plurality of card slots 716.

[0123] Embodiments of the present application provide an electrical device, which includes the battery device 2 in the above embodiments. The battery device 2 is used to provide electrical energy. By providing a box body 5 to accommodate components such as battery cells 6 therein, a stable operating environment is provided for the operation of the battery cells 6, and corrosion or damage to the battery cells 6 caused by external impurities and moisture is reduced. A plurality of battery cells 6 stacked along the first direction X are provided in the box body 5, which can increase the number of battery cells 6 and improve the energy density of the battery device 2. Moreover, a limiting component 7 is provided to limit the displacement caused by the expansion of the battery cells 6, reduce the deformation of the box body 5 caused by the displacement of the battery cells 6, and improve the operating stability of the battery device 2. Among them, the limiting component 7 can expand and contract along the first direction X. The limiting component 7 can extend a certain amount along with the deformation of the battery cells 6, reduce the risk of the limiting component 7 breaking during the deformation of the battery cells 6, thereby reducing the risk of debris generated by the breakage of the limiting component 7 piercing the battery cells 6, and improving the stability of the battery device 2 during operation.

[0124] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body comprises two beam bodies arranged opposite to each other along a first direction; A plurality of battery cells are arranged in the box body, the plurality of battery cells are arranged along the first direction between the two beams, and the battery cells located at both ends of the arrangement direction are respectively supported by the two beams; A limit assembly, both ends of which are respectively connected to the two beams to limit the displacement of the battery cell along the first direction, and the limit assembly can be extended and retracted along the first direction. An insulating member is disposed between the limiting assembly and the battery cell to insulate the limiting assembly and the battery cell.

2. The battery device according to claim 1, characterized in that: The limiting component comprises: A first connecting bar, provided on one side of the battery cell along a second direction, the second direction being perpendicular to the first direction, and the first connecting bar being connected to one of the beam bodies; A second connecting bar, provided on one side of the battery cell along the second direction, the second connecting bar being connected to another of the beam bodies; A connecting member is detachably connected to the first connecting bar and the second connecting bar to adjust the position of the second connecting bar relative to the first connecting bar in the first direction.

3. The battery device according to claim 2, characterized in that: The insulating member includes a first portion disposed between the first connecting bar and the battery cell, and a second portion disposed between the second connecting bar and the battery cell.

4. The battery device according to claim 3, characterized in that: The first part includes: An insulating bottom plate, disposed on a side of the first connecting strip facing the battery cell; The insulating side plate is connected to one side of the insulating bottom plate along the third direction. The third direction, the second direction and the first direction are perpendicular to each other. The insulating side plate and the insulating bottom plate are combined to form a receiving groove for receiving the first connecting strip.

5. The battery device according to claim 2, characterized in that: There are multiple limit assemblies, and the multiple limit assemblies are arranged at intervals along the third direction. The third direction, the second direction and the first direction are perpendicular to each other.

6. The battery device according to claim 5, characterized in that: Multiple battery cells are arranged along the first direction to form a battery column, and the number of battery columns is multiple, and the multiple battery columns are arranged along the third direction. The multiple limit assemblies include a first sub-limiting member and a second sub-limiting member arranged at intervals along the third direction, and the first sub-limiting member is arranged corresponding to any one of the battery columns, and the second sub-limiting member is arranged between two adjacent battery columns and respectively abuts against two adjacent battery columns. Along the third direction, the width of the second sub-limiting member is greater than the width of the first sub-limiting member.

7. The battery device according to any one of claims 1 to 6, characterized in that: The limiting component also includes: A sensing component, connected to the limiter component, and used to sense the tension of the limiter component; The warning device is electrically connected to the sensing component, and the warning device gives an alarm when the sensing component senses that the pulling force of the limiting component reaches a threshold value.

8. The battery device according to claim 7, characterized in that: The battery device further comprises a battery management system, wherein the battery management system is electrically connected to the battery monomer, and the sensing component is electrically connected to the battery management system.

9. The battery device according to claim 2, characterized in that: The first connecting strip is provided with a plurality of first connecting holes arranged along the first direction, the second connecting strip is provided with at least one second connecting hole, and the connecting member further comprises a fastener, which is used to selectively pass through one of the first connecting holes and the second connecting holes to connect the first connecting strip and the second connecting strip.

10. The battery device according to claim 2, characterized in that: A plurality of slots are provided at one end of the first connecting strip facing the second connecting strip, and the plurality of slots are arranged at intervals along the first direction. The connecting member comprises: an elastic member connected to the second connecting strip, the elastic member being capable of stretching and retracting in a third direction, the third direction, the second direction and the first direction being perpendicular to each other; The clamping block is connected to the elastic member, and the clamping block can be selectively embedded in one of the plurality of clamping slots.

11. The battery device according to claim 10, characterized in that: The slot wall of the clamping slot is arranged obliquely along the first direction, and the surface of the clamping block facing the slot wall is arranged obliquely along the first direction.

12. An electrical device, characterized in that: The electrical equipment comprises a battery device as claimed in any one of claims 1 to 11, wherein the battery device is used to provide electrical energy.

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