Battery device, connecting assembly, electric equipment and energy storage equipment

Abstract

The utility model provides a battery device, a connecting assembly, electric equipment and energy storage equipment, and belongs to the technical field of batteries. The battery device comprises a battery monomer group, a box body and a connecting assembly, the box body comprises a box body and at least two cross beams arranged in the box body at intervals, a containing cavity is formed between every two adjacent cross beams, and the battery monomer groups are arranged in the containing cavities. The connecting assembly extends along the first direction and is positioned above the battery monomer group along the height direction of the battery monomer group. The connecting assembly comprises a first connecting piece, a second connecting piece and an adjusting unit, the first connecting piece is connected with one of the two adjacent cross beams, the second connecting piece is connected with the other of the two adjacent cross beams, the first connecting piece is movably connected with the second connecting piece through the adjusting unit, and the adjusting unit is used for adjusting the length of the connecting assembly in the first direction. By improving the adaptability of the connecting assembly, the overall assembly and later maintenance of the battery device are facilitated.

Description

Technical Field

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

[0002] In the box body of a battery device, there are crossbeams provided to limit the expansion of battery cells located inside the box body. In some cases, connection components connected to the crossbeams can also be assembled, and the tensile force of the connection components is used to tighten the crossbeams, so as to cooperate with the crossbeams to jointly resist the expansion force of the battery cells, which is beneficial to improving the stability of the overall structure.

[0003] For different battery devices, connection components of different sizes need to be assembled. Due to the poor adaptability of the connection components, it is not conducive to the overall assembly and later maintenance of the battery device. Summary of the Utility Model

[0004] This application aims to solve at least one of the technical problems existing in the background art. For this reason, an object of this application is to provide a battery device, a connection assembly, an electrical device, and an energy storage device. By providing a connection assembly with high adaptability, it is beneficial to the overall assembly and later maintenance of the battery device.

[0005] An embodiment of the first aspect of this application provides a battery device, including a battery cell group, a box body, and a connection assembly. The battery cell group includes a plurality of battery cells. The box body includes a box body main body and at least two crossbeams spaced apart inside the box body main body. An accommodation cavity is formed between two adjacent crossbeams, and the battery cell group is arranged in the accommodation cavity. The connection assembly extends along a first direction perpendicular to the height direction of the battery cell group, and the connection assembly is located above the battery cell group along the height direction of the battery cell group. Among them, the connection assembly includes a first connection member, a second connection member, and an adjustment unit. The first connection member is connected to one of two adjacent crossbeams, the second connection member is connected to the other of two adjacent crossbeams, the first connection member is movably connected to the second connection member through the adjustment unit, and the adjustment unit is used to adjust the length of the connection assembly along the first direction.

[0006] In the technical solution of the embodiment of this application, by setting an adjustment unit to adjust the overall length of the connection assembly, the same connection assembly can be adapted to the box bodies of different battery devices, which is beneficial to the standardized design of the connection assembly, improves the adaptability and utilization rate of the connection assembly, thereby not only improving the assembly efficiency of the connection assembly, but also facilitating the later maintenance and replacement of the connection assembly, and further being beneficial to the overall assembly and later maintenance of the battery device.

[0007] In some embodiments, the adjusting unit includes an adjusting wheel, a driving tooth, and a locking member. The adjusting wheel is rotatably disposed on the first connecting member, and a tooth groove is provided along the circumferential direction of the edge of the adjusting wheel. The driving tooth is disposed on the second connecting member along a first direction, and the driving tooth meshes with the tooth groove and is used to drive the adjusting wheel to rotate. The locking member is disposed on the first connecting member and cooperates with the adjusting wheel. The locking member is used to allow the first connecting member and the second connecting member to move relative to each other in the direction in which the length of the connecting assembly decreases, and to restrict the first connecting member and the second connecting member from moving relative to each other in the direction in which the length of the connecting assembly increases. Alternatively, the locking member is used to allow the first connecting member and the second connecting member to move relative to each other in the direction in which the length of the connecting assembly increases, and to restrict the first connecting member and the second connecting member from moving relative to each other in the direction in which the length of the connecting assembly decreases. Thus, by the one-way rotation of the adjusting wheel, the connecting assembly can only be adjusted to decrease or increase in length.

[0008] In some embodiments, the adjusting wheel is configured as a ratchet wheel, the driving tooth has a force-receiving surface, and the tooth groove includes a mating surface opposite to and adapted to the force-receiving surface. The force-receiving surface is used to apply a driving force for driving the adjusting wheel to rotate through the mating surface. Wherein the force-receiving surface is perpendicular to the first direction, or the force-receiving surface is disposed at an acute angle to the first direction. Thereby, the driving force can be reliably transmitted to the adjusting wheel and cause it to rotate, improving the reliability of the adjustment.

[0009] In some embodiments, the tooth groove further includes a guiding surface connected to the mating surface, and the angle between the guiding surface and the radial direction of the adjusting wheel is greater than the angle between the mating surface and the radial direction of the adjusting wheel. The locking member includes an abutting member, and the abutting member is configured to move towards the adjusting wheel when the first connecting member and the second connecting member move relative to each other in the first direction, and at least a part of the abutting member is inserted into the tooth groove. By the cooperation of the abutting member with the guiding surface and the mating surface with different degrees of inclination, the one-way rotation of the adjusting wheel can be achieved, thereby realizing the adjustment of the decrease or increase in the length of the connecting assembly.

[0010] In some embodiments, the locking member further includes a reset member, and the reset member is configured to provide a force for moving the abutting member towards the adjusting wheel. Thereby, while satisfying the forward rotation of the adjusting wheel, the abutting member can be timely inserted into the next tooth groove to restrict the reverse rotation of the adjusting wheel, thereby restricting the increase in the length of the connecting assembly, realizing the sequential adjustment of each tooth groove on the adjusting wheel, and improving the accuracy of the adjustment of the decrease or increase in the length of the connecting assembly.

[0011] In some embodiments, the first end of the abutting member is rotatably connected to the first connecting member, one end of the reset member is connected to the first connecting member, the other end of the reset member abuts against a position between the first end and the second end of the abutting member, and the second end of the abutting member abuts against the guiding surface. The abutting member is inserted into or moved out of the tooth groove by rotation, improving the reliability of the operation of the abutting member.

[0012] In some embodiments, the first connector includes a first body and a second body, the first body having a first plane and a second plane facing each other, the first plane facing the top surface of the battery cell having the electrode terminal, the second plane having a first recessed portion, and at least a portion of the adjusting wheel and the locking member being accommodated in the first recessed portion. Thus, the overall thickness of the connecting assembly is reduced, thereby reducing the space occupied by the connecting assembly.

[0013] In some embodiments, the second connector includes a third body and a fourth body, the third body has a third plane and a fourth plane facing each other, the third plane faces the top surface of the battery cell having the electrode terminal, the third plane is provided with a second recessed portion, and at least a portion of the third body is accommodated in the first recessed portion. Thus, the overall thickness of the connection assembly is further reduced, thereby reducing the space occupied by the connection assembly.

[0014] In some embodiments, the third body is provided with a notch extending along the first direction, the driving tooth is provided on a side of the third body facing the notch, and the notch is used to avoid the adjusting wheel, thereby reducing the interference between the second connecting member and the adjusting wheel during the adjustment process.

[0015] In some embodiments, the adjustment unit includes an adjustment portion provided on the first connecting member and a column provided on the second connecting member, wherein the adjustment portion is provided with a plurality of openings at intervals along the first direction, and the openings are used for the column to pass through. By cooperating with the openings at different positions of the column, the length of the connecting assembly can be reduced or increased.

[0016] In some embodiments, the adjustment unit further comprises a fastener, which is detachably connected to an end of the column away from the second connecting member, thereby reducing the phenomenon of the first connecting member detaching from the column, thereby improving the reliability of the connection between the first connecting member and the second connecting member.

[0017] In some embodiments, at least one of the first connecting member and the second connecting member is detachably connected to the crossbeam via a fixing member, thereby improving the reliability of the connection.

[0018] In some embodiments, the battery device further comprises a pressure strip extending along the first direction, the pressure strip having a first surface and a second surface opposite to each other, the first surface facing the top surface of the battery cell having the electrode terminal, and the first surface is connected to the top surface. The second surface is concavely provided with a groove extending along the first direction, the connecting component is movably arranged in the groove along the first direction, and the side wall of the groove is used to limit the connecting component along the second direction perpendicular to the first direction. In this way, the expansion of the battery cell can be further limited while the reliability of the length adjustment of the connecting component is improved.

[0019] An embodiment of a second aspect of the present application provides a connection assembly, which includes the battery cell in the above embodiment.

[0020] An embodiment of the third aspect of the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery device is used to provide electrical energy.

[0021] An embodiment of the fourth aspect of the present application provides an energy storage device, which includes the battery device in the above embodiment.

[0022] The above description is only an overview of the technical solution 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 specific embodiments of the present application are specifically listed below. Description of the Drawings

[0023] In the drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed according to the present application and should not be regarded as limiting the scope of the present application.

[0024] Figure 1 Structural schematic diagram of a vehicle according to some embodiments of the present application;

[0025] Figure 2 Exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0026] Figure 3 Partial structural schematic diagram of a battery device according to some embodiments of the present application;

[0027] Figure 4 Partial structural schematic diagram of a connection component according to some embodiments of the present application;

[0028] Figure 5 One of the exploded structural schematic diagrams of a connection component according to some embodiments of the present application;

[0029] Figure 6 Another exploded structural schematic diagram of a connection component according to some embodiments of the present application;

[0030] Figure 7 Structural schematic diagram of a connection component according to some other embodiments of the present application;

[0031] Figure 8 Exploded structural schematic diagram of a connection component according to some other embodiments of the present application;

[0032] Figure 9 Structural schematic diagram of an adjusting wheel according to some embodiments of the present application;

[0033] Figure 10 For Figure 3Schematic diagram of the enlarged structure at A;

[0034] Figure 11 Schematic diagram of the structure of the pressure strip and the connection component according to some embodiments of the present application.

[0035] Description of the reference numerals in the drawings:

[0036] 1000, vehicle;

[0037] 100, battery device; 200, controller; 300, motor;

[0038] 10, box body; 11, first part; 12, second part; 13, box main body; 14, cross beam;

[0039] 20, battery cell group; 21, battery cell; 211, top surface;

[0040] 30, connection component;

[0041] 31, first connecting piece; 311, first body; 311a, first recess; 312, second body;

[0042] 32, second connecting piece; 321, third body; 321a, second recess; 321b, notch; 322, fourth body;

[0043] 33, adjusting unit;

[0044] 331, adjusting wheel; 331a, mating surface; 331b, guiding surface;

[0045] 332, driving tooth; 332a, force-bearing surface;

[0046] 333, locking piece; 333a, abutting component; 333b, resetting component;

[0047] 334, adjusting part; 334a, opening;

[0048] 335, cylinder;

[0049] 336, fastener;

[0050] 40, fixing piece;

[0051] 50, pressure strip; 51, groove;

[0052] F1, first direction; F2, second direction. Detailed implementation manners

[0053] 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.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0055] In the description of the embodiments of this 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 this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0056] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and 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 can be combined with other embodiments.

[0057] In the description of the embodiments of this 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 " / " herein generally represents an "or" relationship between the associated objects before and after.

[0058] In the description of the embodiments of this application, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0059] In the description of the embodiments of this 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, and is only for the convenience of describing the embodiments of this 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 this application.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "linkage", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may also be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. 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.

[0061] At present, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as aerospace. With the continuous expansion of the application fields of battery devices, the market demand is also continuously increasing.

[0062] The battery device includes a box body and battery cells located inside the box body. As the battery cells are charged and discharged, the battery cells will expand to varying degrees. In order to resist the expansion force of the battery cells, cross beams can be provided in the box body to limit the expansion of the battery cells by using the cross beams. In some cases, connection components connected to the cross beams can also be assembled. The connection components can be steel belts, and the tension of the connection components is used to tighten the cross beams, so as to cooperate with the cross beams to jointly resist the expansion force of the battery cells, which is beneficial to improving the stability of the overall structure.

[0063] However, for different battery devices, the positions of the cross beams are different, and the corresponding sizes of the connection components are also different. That is, it is necessary to design connection components of various sizes to meet the assembly requirements of different battery devices, resulting in a high cost. Due to the poor adaptability of the connection components, not only the assembly efficiency is affected, but also when maintaining and replacing in the later stage, it is necessary to replace the connection components of the corresponding size, increasing the difficulty of maintenance.

[0064] Based on the above considerations, the present application provides a battery device, a connection component, an electrical device, and an energy storage device. The battery device includes: a battery cell group, a box body, and a connection component. The battery cell group includes a plurality of battery cells. The box body includes a box body main body and at least two cross beams spaced apart from each other in the box body main body. An accommodation cavity is formed between two adjacent cross beams, and the battery cell group is disposed in the accommodation cavity. The connection component extends along a first direction perpendicular to the height direction of the battery cell group, and the connection component is located above the battery cell group along the height direction of the battery cell group. Among them, the connection component includes a first connection member, a second connection member, and an adjustment unit. The first connection member is connected to one of two adjacent cross beams, the second connection member is connected to the other of the two adjacent cross beams, and the first connection member is movably connected to the second connection member through the adjustment unit. The adjustment unit is used to adjust the length of the connection component along the first direction.

[0065] By providing an adjustment unit to adjust the overall length of the connection component, the same connection component can be adapted to the box bodies of different battery devices, which is conducive to the standardized design of the connection component, improves the adaptability and utilization rate of the connection component, thereby not only improving the assembly efficiency of the connection component, but also facilitating the later maintenance and replacement of the connection component, and further facilitating the overall assembly and later maintenance of the battery device.

[0066] The battery device disclosed in the embodiments of the present application can be used but is not limited to electrical devices such as vehicles, ships, or aircraft. The power supply system of the electrical device can be composed of the battery device disclosed in the present application. In this way, it is conducive to the overall assembly and later maintenance of the battery device.

[0067] The embodiments of the present application provide an electrical device using the battery device as a power source. The electrical device can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0068] For the convenience of description, the following embodiments take a vehicle 1000, which is an electrical device in an embodiment of the present application, as an example for description.

[0069] Please refer to Figure 1 , Figure 1Schematic structural diagram of a vehicle provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, a range-extended vehicle, etc. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can serve as an operating power source of the vehicle 1000. The vehicle 1000 can further 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, it is used for the working power demands during the start, navigation, and driving of the vehicle 1000.

[0070] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source of the vehicle 1000, but also serve as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0071] Please refer to Figure 2 , Figure 2 Exploded structural diagram of the battery device provided for some embodiments of the present application. The battery device 100 includes a box body 10 and battery cells 21. The battery cells 21 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells 21, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12. The first part 11 and the second part 12 are covered with each other, and the first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery cells 21. The second part 12 can be a hollow structure with one end open. The first part 11 can be a plate-like structure. The first part 11 is covered on the opening side of the second part 12 so that the first part 11 and the second part 12 jointly define an accommodation space; the first part 11 and the second part 12 can also both be hollow structures with one side open, and the opening side of the first part 11 is covered on the opening side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0072] In the battery device 100, there may be multiple battery cells 21. The multiple battery cells 21 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 21. The multiple battery cells 21 can be directly connected in series, in parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 21 is accommodated in the box body 10. Of course, in the battery device 100, multiple battery cells 21 can also be first connected in series, in parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 10. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component for realizing the electrical connection among the multiple battery cells 21.

[0073] Among them, each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 21 can be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes.

[0074] Combined Figures 3 to 8 shown, Figure 3 is a partial structural schematic diagram of the battery device according to some embodiments of the present application; Figure 4 is a partial structural schematic diagram of the connection component according to some embodiments of the present application; Figure 5 is one of the exploded structural schematic diagrams of the connection component according to some embodiments of the present application; Figure 6 is the second exploded structural schematic diagram of the connection component according to some embodiments of the present application; Figure 7 is the structural schematic diagram of the connection component according to some other embodiments of the present application; Figure 8 is the exploded structural schematic diagram of the connection component according to some other embodiments of the present application. Some embodiments of the present application provide a battery device 100, including: a battery cell group 20, a box body 10, and a connection component 30.

[0075] The battery cell group 20 includes multiple battery cells 21. The box body 10 includes a box body 13 and at least two cross beams 14 spaced apart in the box body 13. An accommodation cavity is formed between two adjacent cross beams 14, and the battery cell group 20 is arranged in the accommodation cavity. The connection component 30 extends along a first direction F1 perpendicular to the height direction of the battery cell group 20, and the connection component 30 is located above the battery cell group 20 along the height direction of the battery cell group 20. Among them, the connection component 30 includes a first connection member 31, a second connection member 32, and an adjustment unit 33. The first connection member 31 is connected to one of the two adjacent cross beams 14, the second connection member 32 is connected to the other of the two adjacent cross beams 14, and the first connection member 31 is movably connected to the second connection member 32 through the adjustment unit 33. The adjustment unit 33 is used to adjust the length of the connection component along the first direction F1.

[0076] The battery cell 21 refers to the smallest unit constituting the battery device 100 . A plurality of battery cells 21 may be connected in series, in parallel, or in mixed connection to form a whole, which is a battery cell group 20 .

[0077] The box body 10 is a component for providing a storage space for the battery cell group 20. In the box body 10, the box body 13 is a hollow structure, and the beam 14 is arranged in the box body 13. Two adjacent beams 14 and the inner surface of the box body 13 together define a storage cavity for accommodating the battery cell group 20. In some examples, the beam 14 can be configured as an expansion beam, which is used to fix and position the battery cell 21, and to withstand and disperse the expansion force of the battery cell 21, so as to better adapt to the volume change of the battery cell 21, thereby improving the overall reliability.

[0078] The connecting assembly 30 is a component used to provide tensioning force for two adjacent cross beams 14 . The cross beams 14 tightened by the connecting assembly 30 can more reliably resist the expansion force of the battery cell 21 , thereby improving the stability and reliability of the overall structure.

[0079] In some embodiments, Figure 3 As shown, two adjacent beams 14 are spaced apart along a first direction F1, and a plurality of connecting components 30 are disposed between the two adjacent beams 14. The plurality of connecting components 30 are spaced apart along a second direction F2 perpendicular to the first direction F1, and the plurality of connecting components 30 jointly tighten the two adjacent beams 14 so that the beams 14 are subjected to uniform force.

[0080] In the connection assembly 30, the first connection member 31 is a part connected to one of the two adjacent beams 14, the second connection member 32 is a part connected to the other of the two adjacent beams 14, and the adjustment unit 33 is a component for adjusting the relative position relationship between the first connection member 31 and the second connection member 32. The connection assembly 30 is extended along the first direction F1, and accordingly, the first connection member 31 and the second connection member 32 are extended along the first direction F1. In some examples, the first connection member 31 and the second connection member 32 can be configured as steel belts.

[0081] The first connector 31 is movably connected to the second connector 32 through the adjustment unit 33. The movably connected means a connection mode that allows relative movement between the first connector 31 and the second connector 32. The relative movement between the first connector 31 and the second connector 32 can change the relative position between the first connector 31 and the second connector 32, thereby changing the length of the entire connecting assembly 30 along the first direction F1. For example, the first connector 31 and the second connector 32 move toward each other to reduce the overall length of the connecting assembly 30, and the first connector 31 and the second connector 32 move away from each other to increase the overall length of the connecting assembly 30.

[0082] For different battery devices 100, their structural dimensions are different. Correspondingly, the spacing between two adjacent cross beams 14 is also different. By adjusting the length of the entire connection assembly 30 through the adjustment unit 33, the adaptability of the connection assembly 30 is improved, so that the length of the connection assembly 30 can be adapted to the spacing between two adjacent cross beams 14, so as to reliably tighten the two adjacent cross beams 14, thereby achieving the effect that the same connection assembly 30 can be adapted to the box body 10 of different battery devices 100. Therefore, there is no need to design connection assemblies 30 with different lengths for different battery devices 100, which is beneficial to the standardized design of the connection assembly 30, improves the utilization rate of the connection assembly 30, is beneficial to the improvement of the assembly efficiency while reducing costs, and during later maintenance, only the damaged part of the connection assembly 30 can be replaced without replacing the whole, reducing the difficulty of maintenance and replacement.

[0083] In some embodiments, as Figures 4 to 6 shown, the way of movably connecting the first connecting member 31 and the second connecting member 32 can be a connection way similar to that of a rack and pinion.

[0084] In other embodiments, as Figure 7 and Figure 8 shown, the way of movably connecting the first connecting member 31 and the second connecting member 32 can be a connection way in which a pin shaft cooperates with a through hole.

[0085] By setting the adjustment unit 33 to adjust the length of the entire connection assembly 30, the same connection assembly 30 can be adapted to the box body 10 of different battery devices 100, which is beneficial to the standardized design of the connection assembly 30, improves the adaptability and utilization rate of the connection assembly 30, thereby not only improving the assembly efficiency of the connection assembly 30, but also facilitating the later maintenance and replacement of the connection assembly 30, and further facilitating the overall assembly and later maintenance of the battery device 100.

[0086] Combined with Figures 4 to 6As shown, according to some embodiments of the present application, the adjusting unit 33 includes an adjusting wheel 331, a driving tooth 332, and a locking member 333. The adjusting wheel 331 is rotatably disposed on the first connecting member 31, and a tooth groove is provided along the circumferential direction of the edge of the adjusting wheel 331. The driving tooth 332 is disposed on the second connecting member 32 along the first direction F1. The driving tooth 332 meshes with the tooth groove and is used to drive the adjusting wheel 331 to rotate. The locking member 333 is disposed on the first connecting member 31 and cooperates with the adjusting wheel 331. The locking member 333 is used to allow the first connecting member 31 and the second connecting member 32 to move relative to each other in the direction in which the length of the connecting assembly 30 decreases, and to restrict the first connecting member 31 and the second connecting member 32 from moving relative to each other in the direction in which the length of the connecting assembly 30 increases. Alternatively, the locking member 333 is used to allow the first connecting member 31 and the second connecting member 32 to move relative to each other in the direction in which the length of the connecting assembly 30 increases, and to restrict the first connecting member 31 and the second connecting member 32 from moving relative to each other in the direction in which the length of the connecting assembly 30 decreases.

[0087] The adjusting wheel 331 is a component having a tooth groove at its edge. The adjusting wheel 331 can be rotatably connected to the first connecting member 31 through a first fixed shaft. In some examples, the adjusting wheel 331 can be configured as a gear or a ratchet wheel.

[0088] The driving tooth 332 is a toothed structure for driving the adjusting wheel 331 to rotate. In some examples, the driving tooth 332 can be integrally formed with the second connecting member 32.

[0089] The adjusting wheel 331 and the driving tooth 332 together form a structure similar to a rack and pinion. The driving tooth 332 meshes with the tooth groove on the adjusting wheel 331. The driving tooth 332 drives the adjusting wheel 331 to rotate. As the adjusting wheel 331 rotates, relative movement is generated between the first connecting member 31 and the second connecting member 32, thereby realizing the adjustment of the length of the connecting assembly 30 and improving the adjustment accuracy.

[0090] The locking member 333 is a component for releasing or locking the adjusting wheel 331. The locking member 333 can lock the adjusting wheel 331 by clamping the adjusting wheel 331 or by extending into the tooth groove to catch the adjusting wheel 331.

[0091] In some embodiments, when the adjusting wheel 331 is released, the adjusting wheel 331 is allowed to rotate forward, so that the first connecting member 31 and the second connecting member 32 can move towards each other, thereby reducing the overall length of the connecting assembly 30. When the adjusting wheel 331 is locked, the reverse rotation of the adjusting wheel 331 is blocked, so that the first connecting member 31 and the second connecting member 32 cannot move away from each other, so that the overall length of the connecting assembly 30 can remain unchanged and will not increase under the action of external force, providing a reliable tensile force for two adjacent cross beams 14 to a certain extent. That is, by the one-way rotation of the adjusting wheel 331, the reduction adjustment of the length of the connecting assembly 30 is realized, and the increase of the length of the connecting assembly 30 is restricted.

[0092] In other embodiments, when the adjusting wheel 331 is released, the adjusting wheel 331 is allowed to rotate reversely, so that the first connecting member 31 and the second connecting member 32 can move away from each other, thereby increasing the overall length of the connecting assembly 30. When the adjusting wheel 331 is locked, the forward rotation of the adjusting wheel 331 is blocked, so that the first connecting member 31 and the second connecting member 32 cannot move towards each other, and the overall length of the connecting assembly 30 can adaptively increase under the action of external force, and can adapt to the size change of the overall structure caused by the large expansion amount of the battery cell 21 to a certain extent, so as to reduce the excessive constraint of the connecting assembly 30 on the battery cell 21 when the battery cell 21 expands, thereby reducing the extrusion damage of the battery cell. That is, by the one-way rotation of the adjusting wheel 331, the increase adjustment of the length of the connecting assembly 30 is realized, and the reduction of the length of the connecting assembly 30 is restricted.

[0093] The movable connection between the first connecting member 31 and the second connecting member 32 is realized through the engagement of the tooth grooves on the adjusting wheel 331 and the driving teeth 332, improving the adjustment accuracy. In addition, the one-way rotation of the adjusting wheel 331 is realized through the locking member 333. While realizing the reduction adjustment of the length of the connecting assembly 30, the increase of the length of the connecting assembly 30 can be restricted, or while realizing the increase adjustment of the length of the connecting assembly 30, the reduction of the length of the connecting assembly 30 can be restricted.

[0094] Combined Figures 4 to 6 As shown, according to some embodiments of the present application, the adjusting wheel 331 is configured as a ratchet wheel, the driving tooth 332 has a force receiving surface 332a, the tooth groove includes a mating surface 331a opposite to and adapted to the force receiving surface 332a, and the force receiving surface 332a is used to apply a driving force for driving the adjusting wheel 331 to rotate through the mating surface 331a. The force receiving surface 332a is perpendicular to the first direction F1, or the force receiving surface 332a is arranged at an acute angle to the first direction F1.

[0095] The force-receiving surface 332a is the part where the driving tooth 332 contacts the tooth groove and applies a driving force to the tooth groove. The mating surface 331a is the part where the tooth groove contacts the force-receiving surface 332a. The adjusting wheel 331 is configured as a ratchet wheel, and the tooth grooves on the adjusting wheel 331 are of an asymmetric structure. The mating surface 331a being adapted to the force-receiving surface 332a means that the angles of the mating surface 331a and the force-receiving surface 332a are adapted to each other.

[0096] In some examples, the force-receiving surface 332a is perpendicular to the first direction F1. Correspondingly, at the meshing position of the driving tooth 332 and the tooth groove, the mating surface 331a is also approximately perpendicular to the first direction F1.

[0097] In other examples, the force-receiving surface 332a is arranged at an acute angle with respect to the first direction F1. It can be understood that, as shown in Figure 5 , the force-receiving surface 332a can be inclined to the left along the first direction F1. Correspondingly, at the meshing position of the driving tooth 332 and the tooth groove, the mating surface 331a is inclined to the right along the first direction F1. Or, the force-receiving surface 332a can be inclined to the right along the first direction F1. Correspondingly, at the meshing position of the driving tooth 332 and the tooth groove, the mating surface 331a is inclined to the left along the first direction F1.

[0098] By providing the mating surface 331a adapted to the force-receiving surface 332a, at the meshing position of the driving tooth 332 and the tooth groove, the force-receiving surface 332a and the mating surface 331a can be made to fit as closely as possible. Thus, when the second connecting member 32 moves relative to the first connecting member 31, the force-receiving surface 332a can more reliably transmit the driving force to the mating surface 331a, and reduce the disengagement of the driving tooth 332 and the tooth groove, so as to reliably drive the adjusting wheel 331 to rotate, and further complete the adjustment of reducing or increasing the length of the connecting assembly 30.

[0099] By providing the force-receiving surface 332a and the mating surface 331a with adapted angles, the driving force can be reliably transmitted to the adjusting wheel 331 to make it rotate, and the disengagement of the driving tooth 332 and the tooth groove can be reduced, improving the reliability of the adjustment of reducing or increasing the length of the connecting assembly 30.

[0100] Combined with Figures 4 to 6 , and Figure 9 shown, Figure 9 is a schematic structural view of the adjusting wheel according to some embodiments of the present application. According to some embodiments of the present application, the tooth groove further includes a guiding surface 331b connected to the mating surface 331a, and the angle α between the guiding surface 331b and the radial direction of the adjusting wheel 331 is greater than the angle β between the mating surface 331a and the radial direction of the adjusting wheel 331. The locking member 333 includes an abutting member 333a, and the abutting member 333a is configured to move towards the adjusting wheel 331 when the first connecting member 31 and the second connecting member 32 move relative to each other along the first direction F1, and at least a part of the abutting member 333a is inserted into the tooth groove.

[0101] The guiding surface 331b is a part of the tooth groove adjacent to the mating surface 331a. The guiding surface 331b and the mating surface 331a are arranged alternately along the edge of the adjusting wheel 331 in sequence, and the angle α between the guiding surface 331b and the radial direction of the adjusting wheel 331 is greater than the angle β between the mating surface and the radial direction of the adjusting wheel, that is, the inclination degrees of the guiding surface 331b and the mating surface 331a are different, thereby forming an asymmetric tooth groove at the edge of the adjusting wheel 331.

[0102] The abutting member 333a is a member for being inserted into the tooth groove to limit the reverse rotation of the adjusting wheel 331. Figures 4 to 6 , and Figure 9 , taking the abutting member 333a for allowing the reduction adjustment of the length of the connecting assembly 30 and limiting the increase of the length of the connecting assembly 30 as an example for description. When the length of the connecting assembly 30 is adjusted to be reduced, the adjusting wheel 331 rotates forward, and the abutting member 333a contacts the guiding surface 331b. Since the angle of the guiding surface 331b relative to the radial direction is larger, the abutting member 333a can be pushed open along the guiding surface 331b during the forward rotation of the adjusting wheel 331, so that the abutting member 333a leaves the tooth groove, thereby realizing the allowable forward rotation of the adjusting wheel 331. When there is a tendency for the length of the connecting assembly 30 to increase, the adjusting wheel 331 has a tendency to rotate reversely driven by the driving tooth 332. At this time, the abutting member 333a contacts the mating surface 331a. Since the angle of the mating surface 331a relative to the radial direction is smaller, the abutting member 333a cannot be pushed open, and the abutting member 333a always remains in the state of being inserted into the tooth groove, so that the adjusting wheel 331 is blocked by the abutting member 333a and cannot rotate reversely, that is, the adjusting wheel 331 can only rotate in one direction, thereby restricting the opposite movement of the first connecting member 31 and the second connecting member 32, and further enabling the connecting assembly 30 to maintain a certain tensile force.

[0103] By the cooperation of the abutting member 333a with the guiding surface 331b and the mating surface 331a with different inclination degrees, the one-way rotation of the adjusting wheel 331 can be realized, thereby realizing the reduction or increase adjustment of the length of the connecting assembly 30.

[0104] As shown in Figures 4 to 6 , according to some embodiments of the present application, the locking member 333 further includes a reset member 333b, and the reset member 333b is configured to provide a force for moving the abutting member 333a towards the adjusting wheel 331.

[0105] The reset member 333b is a member that exerts an elastic force on the abutting member 333a by restoring its initial state. The elastic force can be either a tensile force, a pressure, or a torsional force.

[0106] In some embodiments, the reset member 333b is configured as a tension spring, and the elastic force is a tensile force.

[0107] In other embodiments, the reset member 333b is configured as a compression spring, and the elastic force is a compressive force.

[0108] In still other embodiments, the reset member 333b is configured as a torsion spring, and the elastic force is a torsional force.

[0109] Taking the abutting member 333a for allowing the adjustment of the reduction of the length of the connecting assembly 30 and restricting the increase of the length of the connecting assembly 30 as an example for illustration. When adjusting the reduction of the length of the connecting assembly 30, during the forward rotation of the adjusting wheel 331, the abutting member 333a can be pushed open along the guiding surface 331b so that the abutting member 333a leaves the current tooth groove. At this time, the reset member 333b deforms. When rotating to the next tooth groove, the acting force generated by the reset member 333b restoring to its initial state drives the abutting member 333a to re-insert into the tooth groove, so that the adjusting wheel 331 can be timely blocked by the abutting member 333a and cannot rotate in the reverse direction, and the length of the connecting assembly 30 cannot increase. With the cooperation of the abutting member 333a and the reset member 333b, the abutting member 333a is toggled once for each rotation of one tooth groove, realizing the sequential adjustment of each tooth groove on the adjusting wheel 331 and improving the adjustment accuracy.

[0110] Through the cooperation of the reset member 333b and the abutting member 333a, while satisfying the forward rotation of the adjusting wheel 331, the abutting member 333a can be timely inserted into the next tooth groove to restrict the reverse rotation of the adjusting wheel 331, realizing the one-way rotation of the adjusting wheel 331, and through the sequential adjustment of each tooth groove on the adjusting wheel 331, the adjustment accuracy of the reduction or increase of the length of the connecting assembly 30 is improved.

[0111] Combined Figures 4 to 6 As shown, according to some embodiments of the present application, the first end of the abutting member 333a is rotatably connected to the first connecting member 31, one end of the reset member 333b is connected to the first connecting member 31, the other end of the reset member 333b abuts against a position between the first end and the second end of the abutting member 333a, and the second end of the abutting member 333a abuts against the guiding surface 331b.

[0112] The first end of the abutting member 333a is rotatably connected to the first connecting member 31, and the second end of the abutting member 333a is inserted into or moved out of the tooth groove by rotation. In some examples, the first end of the abutting member 333a is rotatably disposed on the second fixed shaft on the first connecting member 31.

[0113] In some embodiments, the reset member 333b is configured as a torsion spring. The torsion spring is sleeved on the third fixed shaft of the first connecting member 31. One end of the torsion spring abuts against the first connecting member 31, and the second end of the torsion spring abuts between the first end and the second end of the abutting member 333a under the action of elastic force, so that the second end of the abutting member 333a can rotate towards the adjusting wheel 331, thereby inserting into the tooth groove and abutting against the guiding surface 331b. For example, when the adjusting wheel 331 rotates forward, the guiding surface 331b pushes the abutting member 333a out of the tooth groove against the elastic force of the torsion spring, and when the torsion spring pushes the abutting member 333a into the next tooth groove, the abutting member 333a can limit the reverse rotation of the adjusting wheel 331.

[0114] By providing the rotatable abutting member 333a, the second end of the abutting member 333a is inserted into or moved out of the tooth groove by rotation, which improves the working reliability of the abutting member 333a.

[0115] Combined Figures 4 to 6 As shown, according to some embodiments of the present application, the first connecting member 31 includes a first body 311 and a second body 312. The first body 311 has a first plane and a second plane facing away from each other. The first plane faces the top surface 211 of the battery cell 21 with electrode terminals, and the second plane is provided with a first recess 311a. At least part of the adjusting wheel 331 and the locking member 333 are accommodated in the first recess 311a.

[0116] At least part of the adjusting wheel 331 and the locking member 333 are accommodated in the first recess. It can be understood that the adjusting wheel 331 and the locking member 333 can be completely accommodated in the first recess 311a, and the upper surfaces of the adjusting wheel 331 and the locking member 333 are lower than or flush with the second plane. Or, a part of the adjusting wheel 331 and the locking member 333 is accommodated in the first recess, and the surfaces of the adjusting wheel 331 and the locking member 333 are higher than the second plane.

[0117] The first body 311 has a certain thickness in the direction perpendicular to the second plane. By accommodating the adjusting wheel 331 and the locking member 333 through the first recess 311a, the protruding amount of the adjusting wheel 331 and the locking member 333 relative to the second plane is reduced, so that the overall thickness of the connecting assembly 30 can be reduced to a certain extent, thereby reducing the occupied space of the connecting assembly 30.

[0118] By providing the first recess 311a to accommodate the adjusting wheel 331 and the locking member 333, the overall thickness of the connecting assembly 30 is reduced, thereby reducing the occupied space of the connecting assembly 30.

[0119] Combined Figures 4 to 6As shown, according to some embodiments of the present application, the second connecting member 32 includes a third body 321 and a fourth body 322. The third body 321 has opposite third and fourth planes. The third plane faces the top surface 211 of the battery cell 21 having electrode terminals. The third plane is provided with a second recess 321a, and at least a part of the third body 321 is received in the first recess 311a.

[0120] Since the third plane faces the top surface 211 of the battery cell 21 having electrode terminals, the third plane faces the first body 311. And since the third plane is provided with the second recess 321a, the thickness of the third body 321 in the direction perpendicular to the third plane is reduced, so that the third body 321 can be fully received in the first recess 311a, further reducing the protruding amount of the third body 321 relative to the second plane. That is, by reducing the thicknesses of the first body 311 and the third body 321 simultaneously, the overall thickness of the connecting assembly 30 can be further reduced to a certain extent, thereby reducing the occupied space of the connecting assembly 30.

[0121] By providing the second recess 321a on the third body 321, the third body 321 can be fully received in the first recess 311a, further reducing the overall thickness of the connecting assembly 30, thereby reducing the occupied space of the connecting assembly 30.

[0122] Combined Figures 4 to 6 As shown, according to some embodiments of the present application, the third body 321 is provided with a notch 321b extending along the first direction F1. The driving tooth 332 is provided on the side of the third body 321 facing the notch 321b, and the notch 321b is used to avoid the adjusting wheel 331.

[0123] When the second connecting member 32 moves towards the first connecting member 31, the adjusting wheel 331 can gradually extend into the notch 321b, reducing the interference between the second connecting member 32 and the adjusting wheel 331 during the movement.

[0124] By providing the notch 321b to avoid the adjusting wheel 331, the interference between the second connecting member 32 and the adjusting wheel 331 during the adjustment process is reduced.

[0125] Combined Figure 7 and Figure 8 As shown, according to some embodiments of the present application, the adjusting unit 33 includes an adjusting part 334 provided on the first connecting member 31 and a column 335 provided on the second connecting member 32. The adjusting part 334 is provided with a plurality of openings 334a at intervals along the first direction F1, and the openings 334a are used for the column 335 to pass through.

[0126] Inserting the cylinder 335 into the opening 334a near the second connector 32 can increase the overall length of the connection assembly 30, and inserting the cylinder 335 into the opening 334a away from the second connector 32 can decrease the overall length of the connection assembly 30. That is, through the cooperation of the opening 334a and the cylinder 335, both the decrease adjustment and the increase adjustment of the length of the connection assembly 30 can be achieved. And after the cylinder 335 is inserted into the opening 334a, the opening 334a can limit the cylinder 335, so that the relative position between the first connector 31 and the second connector 32 remains unchanged, that is, the relative movement of the first connector 31 and the second connector 32 away from each other can be restricted, thereby playing a locking role, keeping the length of the connection assembly 30 unchanged, and further enabling the connection assembly 30 to maintain a certain tensile force.

[0127] Through the cooperation of the cylinder 335 and the openings 334a at different positions, the decrease adjustment or the increase adjustment of the length of the connection assembly 30 can be achieved, and the length of the adjusted connection assembly 30 can be kept unchanged, so that the connection assembly 30 can maintain a certain tensile force.

[0128] Combined Figure 7 with Figure 8 As shown, according to some embodiments of the present application, the adjustment unit 33 further includes a fastener 336, and the fastener 336 is detachably connected to the end of the cylinder 335 away from the second connector 32.

[0129] After the adjustment is completed, the first connector 31 is fixed to the cylinder 335 by using the fastener 336 to reduce the phenomenon that the first connector 31 detaches from the cylinder 335. When adjustment is required, the fastener 336 is removed from the cylinder 335 so that the cylinder 335 can be removed from the opening 334a.

[0130] In some embodiments, the fastener 336 can be configured as a plug pin, and a plug pin hole is provided at the end of the cylinder 335 away from the second connector 32. The plug pin is inserted into the plug pin hole to fix the first connector 31 to the cylinder 335.

[0131] In other embodiments, the fastener 336 can be configured as a nut, and the cylinder 335 can be configured as a stud or a bolt. The nut is threadedly connected to the cylinder to fix the first connector 31 to the cylinder 335.

[0132] By providing the fastener 336 that cooperates with the cylinder 335, the phenomenon that the first connector 31 detaches from the cylinder 335 is reduced, thereby improving the reliability of the connection between the first connector 31 and the second connector 32.

[0133] As Figure 10 shown, Figure 10 is Figure 3Schematic enlarged view at A. According to some embodiments of the present application, at least one of the first connecting member 31 and the second connecting member 32 is detachably connected to the cross beam 14 through a fixing member 40.

[0134] The fixing member 40 serves as a mounting seat for the first connecting member 31 and the second connecting member 32, reducing the damage to the cross beam 14 during the disassembly and assembly process of the connecting assembly 30, and improving the reliability of the connection between the connecting assembly 30 and the cross beam 14.

[0135] At least one of the first connecting member 31 and the second connecting member 32 is detachably connected to the cross beam 14 through the fixing member 40. It can be understood that the first connecting member 31 is connected to the cross beam 14 through the fixing member 40, or the second connecting member 32 is connected to the cross beam 14 through the fixing member 40, or both the first connecting member 31 and the second connecting member 32 are connected to the cross beam 14 through the corresponding fixing members 40.

[0136] In some embodiments, the first connecting member 31 and the second connecting member 32 can be bolted to the fixing member 40, and the connection manner between the fixing member 40 and the cross beam 14 can be snap connection.

[0137] By providing the fixing member 40 to connect the connecting assembly 30 and the cross beam 14, the reliability of the connection is improved.

[0138] Combined Figure 10 and Figure 11 as shown, Figure 11 Schematic structural view of the pressure strip and the connecting assembly according to some embodiments of the present application. According to some embodiments of the present application, the battery device 100 further includes a pressure strip 50 extending along the first direction F1. The pressure strip 50 has opposite first and second surfaces. The first surface faces the top surface 211 of the battery cell 21 having the electrode terminal, and the first surface is connected to the top surface 211. The second surface is recessed with a groove 51 extending along the first direction F1. The connecting assembly is movably disposed in the groove 51 along the first direction F1, and the side wall of the groove 51 is used to limit the connecting assembly 30 in the second direction F2 perpendicular to the first direction F1.

[0139] The pressure strip 50 is a component for pressing the battery cell 21 against the box body 10 along the height direction of the battery cell group 20 to further limit the expansion of the battery cell 21. In some examples, the pressure strip 50 can be bonded to the top surface 211 of the battery cell 21, and both ends of the pressure strip 50 can be bolted to the cross beam 14. Thus, the main frequency and the overall stiffness can be improved.

[0140] The side wall of the groove 51 limits the connection assembly 30 in the second direction F2, so that the first connecting member 31 and the second connecting member 32 can only move relative to each other in the first direction F1, but not in the second direction F2. Thus, when the first connecting member 31 and the second connecting member 32 are movably connected through the adjusting wheel 331 and the driving tooth 332, the tooth grooves of the driving tooth 332 and the adjusting wheel 331 can always maintain a reliable meshing state, so as to effectively limit the increase in the length of the connection assembly 30 in cooperation with the locking member 333, thereby improving the reliability of the adjustment.

[0141] By connecting the pressure strip 50 to the top surface 211 of the battery cell 21, the expansion of the battery cell 21 can be further restricted and the overall stiffness can be improved. At the same time, the movement direction of the first connecting member 31 and the second connecting member 32 is limited by the groove 51 on the pressure strip 50, improving the reliability of the length adjustment of the connection assembly 30.

[0142] Combined Figures 3 to 8 As shown in the figure, an embodiment of the second aspect of the present application provides a connection assembly 30. The connection assembly 30 extends along the first direction F1. The connection assembly 30 includes a first connecting member 31, a second connecting member 32 and an adjusting unit 33. The first connecting member 31 is connected to one of the adjacent two cross beams 14 of the battery device 100, and the second connecting member 32 is connected to the other of the adjacent two cross beams 14. The first connecting member 31 is movably connected to the second connecting member 32 through the adjusting unit 33, and the adjusting unit 33 is used to adjust the length of the connection assembly 30 along the first direction F1.

[0143] The connection assembly 30 is a component used in the battery device 100 to provide a tensile force for the adjacent two cross beams 14 of the box body 10 of the battery device 100. The cross beam 14 tightened by the connection assembly 30 can more reliably resist the expansion force of the battery cell 21 in the box body 10, improving the stability and reliability of the overall structure.

[0144] In some embodiments, as Figure 3 shown, the adjacent two cross beams 14 are arranged at intervals along the first direction F1. A plurality of connection assemblies 30 are arranged between the adjacent two cross beams 14. The plurality of connection assemblies 30 are arranged at intervals along the second direction F2 perpendicular to the first direction F1. The adjacent two cross beams 14 are jointly tightened by the plurality of connection assemblies 30 so that the cross beams 14 are uniformly stressed.

[0145] In the connecting assembly 30, the first connecting member 31 is a part connected to one of two adjacent cross beams 14, the second connecting member 32 is a part connected to the other of the two adjacent cross beams 14, and the adjusting unit 33 is a component for adjusting the relative positional relationship between the first connecting member 31 and the second connecting member 32. The connecting assembly 30 extends along the first direction F1. Correspondingly, the first connecting member 31 and the second connecting member 32 extend along the first direction F1. In some examples, the first connecting member 31 and the second connecting member 32 can be configured as steel belts.

[0146] The first connecting member 31 is movably connected to the second connecting member 32 through the adjusting unit 33. A movable connection means a connection method that allows relative movement between the first connecting member 31 and the second connecting member 32. The relative movement between the first connecting member 31 and the second connecting member 32 can change the relative position between the first connecting member 31 and the second connecting member 32, thereby changing the overall length of the connecting assembly 30 along the first direction F1. For example, the first connecting member 31 and the second connecting member 32 move towards each other to reduce the overall length of the connecting assembly 30, and the first connecting member 31 and the second connecting member 32 move away from each other to increase the overall length of the connecting assembly 30.

[0147] For different battery devices 100, their structural dimensions are different. Correspondingly, the spacing between two adjacent cross beams 14 is also different. By adjusting the overall length of the connecting assembly 30 through the adjusting unit 33, the adaptability of the connecting assembly 30 is improved, so that the length of the connecting assembly 30 can be adapted to the spacing between two adjacent cross beams 14, so as to reliably tighten the two adjacent cross beams 14, thereby achieving the effect that the same connecting assembly 30 can be adapted to the boxes 10 of different battery devices 100. Thus, there is no need to design connecting assemblies 30 with different lengths for different battery devices 100, which is beneficial to the standardized design of the connecting assembly 30, improves the utilization rate of the connecting assembly 30, is beneficial to the improvement of the assembly efficiency while reducing costs, and during later maintenance, only the damaged part of the connecting assembly 30 can be replaced without replacing the whole, reducing the difficulty of maintenance and replacement.

[0148] In some embodiments, as Figures 4 to 6 shown, the way of the movable connection between the first connecting member 31 and the second connecting member 32 can be a connection way similar to that of a rack and pinion.

[0149] In other embodiments, as Figure 7 and Figure 8 shown, the way of the movable connection between the first connecting member 31 and the second connecting member 32 can be a connection way where a pin shaft cooperates with a through hole.

[0150] By setting the adjusting unit 33 to adjust the overall length of the connecting component 30, the same connecting component 30 can be adapted to the boxes 10 of different battery devices 100, which is conducive to the standardized design of the connecting component 30, improves the adaptability and utilization rate of the connecting component 30, thus not only improving the assembly efficiency of the connecting component 30, but also facilitating the later maintenance and replacement of the connecting component 30, and further facilitating the overall assembly and later maintenance of the battery device 100.

[0151] An embodiment of the third aspect of the present application provides an electrical device, including the battery device 100 as described in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0152] The electrical device in this embodiment can have all the beneficial effects of the above battery device 100, which will not be elaborated here.

[0153] An embodiment of the fourth aspect of the present application provides an energy storage device, including the battery device 100 as described in any of the above embodiments.

[0154] The energy storage device in this embodiment can have all the beneficial effects of the above battery device 100, which will not be elaborated here.

[0155] Next, in conjunction with Figures 3 to 11 A further detailed description of the embodiments of the present application will be made.

[0156] The battery device 100 includes a box 10, a battery cell group 20, a connecting component 30, a fixing member 40, and a pressing strip 50.

[0157] The box 10 includes a box body 13 and two cross beams 14 arranged at intervals in the box body 13 along the first direction F1. An accommodation cavity is formed between two adjacent cross beams 14, and the battery cell group 20 is arranged in the accommodation cavity.

[0158] The battery cell group 20 includes a plurality of battery cells 21.

[0159] The connecting component 30 includes a first connecting member 31, a second connecting member 32, and an adjusting unit 33. The first connecting member 31 and the second connecting member 32 are configured as steel belts. The first connecting member 31 is connected to one of two adjacent cross beams 14 through the fixing member 40, and the second connecting member 32 is connected to the other of two adjacent cross beams 14 through the fixing member 40. The first connecting member 31 is movably connected to the second connecting member 32 through the adjusting unit 33, and the adjusting unit 33 is used to adjust the length of the connecting component 30 along the first direction F1.

[0160] The lath 50 extends along the first direction F1. The lath 50 has opposite first and second surfaces. The first surface faces the top surface 211 of the battery cell 21 with the electrode terminal, and the first surface is connected to the top surface 211. The second surface is recessed with a groove 51 extending along the first direction F1. The connecting assembly 30 is movably arranged in the groove 51 along the first direction F1, and the side wall of the groove 51 is used to limit the connecting assembly 30 in the second direction F2 perpendicular to the first direction F1.

[0161] The adjusting unit 33 has two structural forms. The adjusting unit 33 of the first structural form includes an adjusting wheel 331, a driving tooth 332, and a locking member 333. The adjusting wheel 331 is configured as a ratchet wheel. The ratchet wheel is rotatably arranged on the first connecting member 31. The driving tooth 332 is arranged on the second connecting member 32 along the first direction F1. The driving tooth 332 meshes with the ratchet wheel. The locking member 333 includes an abutting member 333a and a reset member 333b. The reset member 333b is configured as a torsion spring. The torsion spring is fixed to the first connecting member 31. The first end of the torsion spring is connected to the first connecting member 31. The second end of the torsion spring abuts between the first end and the second end of the abutting member 333a. The first end of the abutting member 333a is rotatably connected to the first connecting member 31. The second end of the abutting member 333a extends into the tooth groove of the ratchet wheel under the elastic force of the torsion spring and abuts against the guiding surface 331b of the tooth groove. When the connecting assembly 30 is adjusted in the direction of decreasing length, the guiding surface 331b can push the abutting member 333a away so that the ratchet wheel can rotate forward. When the connecting assembly 30 has a tendency to increase in length, the abutting member 333a can abut against the mating surface 331a of the tooth groove, thereby restricting the reverse rotation of the ratchet wheel and preventing the length of the connecting assembly 30 from increasing.

[0162] The adjusting unit 33 of the second structural form includes an adjusting part 334 located on the first connecting member 31, a bolt fixed to the second connecting member 32, and a nut connected to the bolt. The adjusting part 334 is provided with a plurality of openings 334a at intervals along the first direction F1. The bolt is inserted into the corresponding opening 334a to realize the adjustment of reducing or increasing the length of the connecting assembly 30. After the adjustment is completed, the first connecting member 31 is locked to the bolt by using the nut.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the 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 that fall within the scope of the claims.

Claims

1. A battery device (100), characterized in that, Comprising: A battery cell group (20), including a plurality of battery cells (21); A box body (10), including a box main body (13) and at least two cross beams (14) spaced apart and arranged inside the box main body (13), a receiving cavity is formed between two adjacent cross beams (14), and the battery cell group (20) is arranged in the receiving cavity; and A connection assembly (30), extending along a first direction (F1) perpendicular to the height direction of the battery cell group (20), and the connection assembly (30) is located above the battery cell group (20) along the height direction; Wherein, the connection assembly (30) includes a first connection member (31), a second connection member (32) and an adjustment unit (33), the first connection member (31) is connected to one of two adjacent cross beams (14), and the second connection member (32) is connected to the other of the two adjacent cross beams (14); the first connection member (31) is movably connected to the second connection member (32) through the adjustment unit (33), and the adjustment unit (33) is used to adjust the length of the connection assembly (30) along the first direction (F1).

2. The battery device (100) according to claim 1, characterized in that, The adjustment unit (33) includes: An adjustment wheel (331), rotatably arranged on the first connection member (31), and a tooth groove is arranged along the circumferential direction of the edge of the adjustment wheel (331); A driving tooth (332), arranged on the second connection member (32) along the first direction (F1), the driving tooth (332) meshes with the tooth groove and is used to drive the adjustment wheel (331) to rotate; and A locking member (333), arranged on the first connection member (31) and cooperating with the adjustment wheel (331), the locking member (333) is used to allow the first connection member (31) and the second connection member (32) to move relative to each other in the direction in which the length of the connection assembly (30) decreases, and restrict the first connection member (31) and the second connection member (32) from moving relative to each other in the direction in which the length of the connection assembly (30) increases; or, the locking member (333) is used to allow the first connection member (31) and the second connection member (32) to move relative to each other in the direction in which the length of the connection assembly (30) increases, and restrict the first connection member (31) and the second connection member (32) from moving relative to each other in the direction in which the length of the connection assembly (30) decreases.

3. The battery device (100) according to claim 2, characterized in that, The adjustment wheel (331) is configured as a ratchet wheel, the driving tooth (332) has a force receiving surface (332a), and the tooth groove includes a mating surface (331a) opposite to and adapted to the force receiving surface (332a), and the force receiving surface (332a) is used to apply a driving force for driving the adjustment wheel (331) to rotate through the mating surface (331a); Wherein, the force receiving surface (332a) is perpendicular to the first direction (F1), or the force receiving surface (332a) is arranged at an acute angle to the first direction (F1).

4. The battery device (100) according to claim 3, characterized in that, The tooth groove further includes a guiding surface (331b) connected to the mating surface, and an included angle α between the guiding surface (331b) and the radial direction of the adjusting wheel (331) is greater than an included angle β between the mating surface (331a) and the radial direction of the adjusting wheel (331). The locking member (333) includes an abutting member (333a), and the abutting member (333a) is configured to move towards the adjusting wheel (331) when the first connecting member (31) and the second connecting member (32) move relative to each other in the first direction (F1), and at least a part of the abutting member (333a) is inserted into the tooth groove.

5. The battery device (100) according to claim 4, characterized in that, The locking member (333) further includes a reset member (333b), and the reset member (333b) is configured to provide a force for moving the abutting member (333a) towards the adjusting wheel (331).

6. The battery device (100) according to claim 5, characterized in that, A first end of the abutting member (333a) is rotatably connected to the first connecting member (31), one end of the reset member (333b) is connected to the first connecting member (31), the other end of the reset member (333b) abuts against a position between the first end and the second end of the abutting member (333a), and the second end of the abutting member (333a) abuts against the guiding surface (331b).

7. The battery device (100) according to claim 2, characterized in that, The first connecting member (31) includes a first body (311) and a second body (312). The first body (311) has a first plane and a second plane facing away from each other. The first plane faces the top surface (211) of the battery cell (21) having an electrode terminal, and a first recess (311a) is provided on the second plane. At least a part of the adjusting wheel (331) and the locking member (333) is received in the first recess (311a).

8. The battery device (100) according to claim 7, characterized in that, The second connecting member (32) includes a third body (321) and a fourth body (322). The third body (321) has a third plane and a fourth plane facing away from each other. The third plane faces the top surface (211) of the battery cell (21) having an electrode terminal, and a second recess (321a) is provided on the third plane. At least a part of the third body (321) is received in the first recess (311a).

9. The battery device (100) according to claim 8, characterized in that, The third body (321) is provided with a notch (321b) extending in the first direction (F1), and the driving tooth (332) is provided on a side of the third body (321) facing the notch (321b). The notch (321b) is used to avoid the adjusting wheel (331).

10. The battery device (100) according to claim 1, characterized in that, The adjusting unit (33) includes an adjusting part (334) provided on the first connecting member (31) and a column (335) provided on the second connecting member (32); The adjusting part (334) is provided with a plurality of openings (334a) spaced along the first direction (F1), and the openings (334a) are used for the column (335) to pass through.

11. The battery device (100) according to claim 10, characterized in that, The adjusting unit (33) further includes a fastener (336), and the fastener (336) is detachably connected to an end of the column body (335) facing away from the second connecting member (32).

12. The battery device (100) according to claim 1, characterized in that, At least one of the first connecting member (31) and the second connecting member (32) is detachably connected to the cross beam (14) through a fixing member (40).

13. The battery device (100) according to claim 1, characterized in that, The battery device (100) further includes a pressure strip (50) extending along the first direction (F1). The pressure strip (50) has a first surface and a second surface facing away from each other. The first surface faces the top surface (211) of the battery cell (21) having an electrode terminal, and the first surface is connected to the top surface (211). A groove (51) extending along the first direction (F1) is recessed in the second surface. The connecting assembly (30) is movably disposed in the groove (51) along the first direction (F1), and the side wall of the groove (51) is used to limit the connecting assembly (30) in a second direction (F2) perpendicular to the first direction (F1).

14. A connecting component, characterized in that, The connecting assembly extends along the first direction, and the connecting assembly includes: A first connecting member (31) for connecting to one of two adjacent cross beams (14) of the battery device (100); A second connecting member (32) for connecting to the other of the two adjacent cross beams (14); An adjusting unit (33), the first connecting member (31) is movably connected to the second connecting member (32) through the adjusting unit (33), and the adjusting unit (33) is used to adjust the length of the connecting assembly (30) along the first direction (F1).

15. An electrical device, characterized in that, The electrical equipment includes the battery device (100) according to any one of claims 1-13, and the battery device (100) is used to provide electric energy.

16. An energy storage device, characterized in that, The energy storage device includes the battery device (100) according to any one of claims 1-13.

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