Battery device, electric equipment and energy storage equipment

Abstract

The utility model provides a battery device, electric equipment and energy storage equipment, and belongs to the technical field of batteries, the battery device comprises a plurality of battery monomers, end plates and a connecting assembly, the end plates comprise a first end plate and a second end plate which are oppositely arranged at intervals along a first direction, and the plurality of battery monomers are located between the first end plate and the second end plate; the connecting assembly comprises at least one connecting piece, and two ends of the connecting piece are respectively connected with the first end plate and the second end plate, so that the end plates clamp the plurality of single batteries along the first direction; wherein at least one of the first end plate and the second end plate is provided with a lock accessory, and the connecting piece is connected with the lock accessory in a buckling mode. The assembly efficiency of the battery device can be improved by adopting the buckle connection mode, meanwhile, the generation of particles in the assembly process is reduced, and the influence of the particles on the performance of the battery device is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device, an electrical device, and an energy storage device. Background Art

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage devices, playing a crucial role in promoting energy transformation and sustainable development. Battery technology is a crucial factor in the development of the new energy industry.

[0003] During the assembly process of the battery device, bolts are used to securely connect the steel strips to the end plates, thereby locking and securing the battery cells between the two end plates. Bolt installation is inefficient and carries the risk of particle generation during installation, posing a safety hazard. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, an electrical device, and an energy storage device that improves the assembly efficiency of the battery device while reducing the impact on the insulation performance of the battery device.

[0005] An embodiment of the first aspect of the present application provides a battery device. The battery device includes a plurality of battery cells, end plates, and a connection assembly. The end plates include a first end plate and a second end plate spaced relative to each other along a first direction, with the plurality of battery cells positioned between the first end plate and the second end plate. The connection assembly includes at least one connector, the ends of which are respectively connected to the first end plate and the second end plate, so that the end plates clamp the plurality of battery cells along the first direction. At least one of the first end plate and the second end plate is provided with a locking attachment, and the connecting attachment and the locking attachment are connected by a snap-fit mechanism.

[0006] In the technical solution of the embodiment of the present application, a locking accessory is provided on the end plate, and the locking accessory of the connector and the end plate are fixedly connected by a snap-fit method. On the one hand, it is convenient to enhance the convenience of connecting the connector and the end plate during the subsequent assembly and fixation of the battery cells, thereby improving the assembly efficiency of the battery device; on the other hand, it can reduce the generation of particles during the assembly process, thereby reducing the impact of the particles on the insulation performance of the battery device.

[0007] In some embodiments, the first end plate is provided with a first locking member for connecting to the connector, and the second end plate is provided with a second locking member for connecting to the connector; wherein at least one of the first locking member and the second locking member is configured to be longer when connected to the connector than when disconnected from the connector. By connecting the first and second locking members to both ends of the connector and utilizing deformation of at least one of the first and second locking members, a clamping force is generated between the first and second end plates, thereby facilitating a tight fit between multiple battery cells and other components within the battery module.

[0008] In some embodiments, the first end plate is provided with a first locking member for connecting to the connector, and the second end plate is provided with a second locking member for connecting to the connector; wherein the connector is configured such that its length when connected to the first and second locking members is greater than its length when disconnected from the first and second locking members. By connecting the connector to the first locking member of the first end plate and the second locking member of the second end plate, respectively, a clamping force is generated between the first and second end plates, thereby facilitating a close fit between multiple battery cells and other components within the battery module, thereby enhancing the structural stability of the battery module and improving its resistance to vibration and impact.

[0009] In some embodiments, the connector includes a first connecting portion for connecting to a first locking component, and the first locking component includes a fixed portion, a movable portion, and a latching portion, wherein the fixed portion is fixedly connected to the first end plate; the movable portion is connected to the fixed portion and can flip around the fixed portion; the latching portion is movably connected to the movable portion, and the latching portion adjusts its distance from the first connecting portion as the movable portion flips, and moves relative to the movable portion to connect to or disconnect from the first connecting portion. By combining the fixed portion, the movable portion, and the latching portion to form the first locking component, the connector and the first locking component can be connected or disconnected by simply flipping, which is convenient to operate and can improve the assembly efficiency of the battery device. In addition, the flip-type snap connection method can withstand multiple flipping operations without affecting performance, can be reused, and reduces usage costs.

[0010] In some embodiments, the first locking member is disposed on a side surface of the first end plate facing away from the second end plate, and the first connecting portion includes a first portion and a second portion connected to each other. The extension direction of the first portion intersects the extension direction of the second portion, and the end of the second portion remote from the first portion is connected to the locking portion by a snap-fit method. By disposing the first locking member on the side of the first end plate, the space on the top surface of the first end plate can be avoided, which facilitates the arrangement of the battery module. At the same time, the curved design of the connecting member can limit the first end plate in the first direction and the battery cell in the third direction.

[0011] In some embodiments, the second portion includes a main body, a bent portion, and a flange portion, wherein the main body is connected to the first portion, and the extension direction of the first portion intersects the extension direction of the main body; the bent portion is connected to an end of the main body away from the first portion; the flange portion is connected to an end of the bent portion away from the main body and is spaced relative to the main body along a direction perpendicular to the extension direction of the main body, so that the main body, the bent portion, and the flange portion are connected together to form a slot for accommodating the latch portion; and wherein the latch portion is configured to be able to enter or exit the slot by passing over the flange portion. The slot is formed by the combination of the main body, the bent portion, and the flange portion, and is used to cooperate with the latch portion for connection. The latch portion and the second portion can be connected or separated by simply flipping, which is convenient to operate and can improve the assembly efficiency of the battery device. The flange portion is used to prevent the latch portion from accidentally falling off, which can improve the stability of the connection.

[0012] In some embodiments, when the locking portion is connected to the first connecting portion, the shortest distance between the bent portion and the fixed portion is L1; when the locking portion is separated from the first connecting portion, the shortest distance between the bent portion and the fixed portion is L2, and the following conditions are satisfied: 1.5mm≤(L2-L1)≤2.5mm. By comprehensively considering the convenience of the connection operation and the stability of the connection, the change in the distance between the bent portion and the fixed portion of the connector from the unconnected relaxed state to the connected tensioned state is between 1.5mm and 2.5mm. This facilitates the connection of the locking portion to the first connecting portion while ensuring that the connector is in a tensioned state, improving the stability of the connection between the first and second end plates, and also limiting the position of the battery cell in the third direction.

[0013] In some embodiments, when the locking portion is connected to the first connecting portion, the distance L3 between the flange and the apex of the locking portion satisfies the following conditions: 4.5 mm ≤ L3 ≤ 5.5 mm. Taking into account both the ease of connection and the stability of the connection, the distance L3 between the flange and the apex of the locking portion is set between 4.5 mm and 5.5 mm. This allows the locking portion to easily pass over the flange and enter or exit the slot while also preventing the connector from falling off, thereby improving the stability of the connection between the first and second end plates.

[0014] In some embodiments, the connector includes an elastic portion configured to elastically deform when subjected to tension, thereby increasing the length of the connector. By providing the elastic portion on the connector, when the two ends of the connector are respectively connected to the first end plate and the second end plate, the connector generates elastic tension, which creates a clamping force between the first and second end plates. This helps to ensure a tight fit between multiple battery cells and other components within the battery module, thereby enhancing the structural stability of the battery module.

[0015] In some embodiments, the elastic portion includes at least one hollow area, or the elastic portion includes a plurality of connected and parallel pleats. By providing a variety of structural designs for the elastic portion, it is easy to select an appropriate extension structure according to actual conditions, which can meet the needs of different scenarios.

[0016] In some embodiments, the elastic portion is disposed on the second portion of the first connecting portion. The tension of the second portion facilitates the first portion to adhere to the first top surface of the first end plate, and also facilitates the connector to adhere to the top surface of the battery cell, thereby effectively limiting the battery cell in the third direction.

[0017] In some embodiments, the first locking member and the second locking member have the same structure. By adopting the same structural design, mass production of parts is facilitated, and no orientation distinction is required during assembly, which can increase production speed, reduce production costs, and help improve assembly efficiency.

[0018] In some embodiments, the second locking member is a fastener that is threaded or riveted to the second end plate. Using the second locking member as a fastener provides more connection methods, increasing the diversity of connection methods and facilitating selection of an appropriate connection method based on actual conditions, meeting connection requirements in various scenarios.

[0019] In some embodiments, the connector includes a first connecting portion for connecting to a first end plate, a second connecting portion for connecting to a second end plate, and a limiting portion located between the first and second connecting portions; wherein the limiting portion abuts against any one of the multiple battery cells to limit the position of the multiple battery cells. By utilizing the limiting portion to abut against any one of the battery cells, the connector provides additional support for the battery cells and, in conjunction with the first and second end plates, limits the position of the multiple battery cells in multiple directions, effectively improving the stability of the overall structure of the battery module.

[0020] In some embodiments, the stopper includes an inner core connected to the first and second connecting portions, and an elastic insulating portion sleeved on the outer surface of the inner core, the elastic insulating portion being in contact with the plurality of battery cells. The elastic insulating portion effectively separates the inner core from the battery cells, reducing the likelihood of short circuits, leakage, and other faults. Furthermore, the elasticity of the elastic insulating portion reduces the impact of the stopper on the battery cells.

[0021] An embodiment of the second 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.

[0022] An embodiment of the third aspect of the present application provides an energy storage device, which includes the battery device in the above embodiment, and the energy storage device is used to store electrical energy.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the accompanying 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 in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0026] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0027] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0028] Figure 4 A schematic diagram of the structure of the connection between the battery cell and the end plate provided in some embodiments of the present application;

[0029] Figure 5 A top view of the connection between a battery cell and an end plate provided in some embodiments of the present application;

[0030] Figure 6 for Figure 4 A partial enlarged schematic diagram of part A;

[0031] Figure 7 A schematic diagram of the structure of the connection between the connecting member and the first locking accessory provided in some embodiments of the present application;

[0032] Figure 8 for Figure 7 A partial enlarged schematic diagram of part B;

[0033] Figure 9 A schematic diagram of a structure in which a connecting member provided in some embodiments of the present application is disconnected from a first locking accessory;

[0034] Figure 10 Schematic diagram of the connection structure at both ends of a connector provided in some embodiments of the present application.

[0035] Description of reference numerals:

[0036] 10. Vehicle; 100. Battery device; 200. Controller; 300. Motor; 110. Housing; 111. First housing portion; 112. Second housing portion; 120. Battery cell; 121. End cap; 1211. Electrode terminal; 122. Housing; 123. Electrode assembly; 1231. Tab; 130. End plate; 131. First end plate; 1311. First top surface; 1312. First side surface; 132. Second end plate; 140 , connecting assembly; 141, connecting piece; 1411, elastic part; 150, first locking part; 151, fixing part; 152, movable part; 153, locking part; 160, second locking part; 170, first connecting part; 171, first part; 172, second part; 1721, main body; 1722, bending part; 1723, flanging part; 1724, slot; 180, second connecting part; 190, limiting part; 191, elastic insulating part. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0040] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0044] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0045] Currently, market developments indicate that rechargeable batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in various electronic devices, including electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, market demand is also growing.

[0046] The battery device includes a battery cell and a box body. The box body is used to accommodate the battery cell and the end plate and connector for fixing the battery cell. The end plate includes a first end plate and a second end plate. By arranging multiple battery cells between the first end plate and the second end plate and connecting the first end plate and the second end plate using the connector, the multiple battery cells can be limited and fixed.

[0047] In some embodiments, through holes are provided at both ends of the connector, and threaded holes are provided on the first end plate and the second end plate, respectively. The two ends of the connector are fixed to the first end plate and the second end plate, respectively, by adopting a threaded connection method. The threaded connection method takes a long time to operate, which reduces the assembly efficiency of the battery device. In addition, during the installation and fixing process of the bolts, the bolts are squeezed and contacted with the threaded holes of the first end plate and the second end plate, which may generate particles. Since the particles are made of metal, they may affect the insulation performance inside the battery device.

[0048] Based on the above problems, an embodiment of the present application provides a battery device, an electrical device and an energy storage device, wherein the battery device includes a plurality of battery cells, an end plate and a connection assembly, wherein the end plate includes a first end plate and a second end plate arranged at relative intervals along a first direction, and a plurality of battery cells are located between the first end plate and the second end plate; the connection assembly includes at least one connector, the two ends of the connector are respectively connected to the first end plate and the second end plate, so that the end plate clamps the plurality of battery cells along the first direction; wherein at least one of the first end plate and the second end plate is provided with a locking accessory, and the connector and the locking accessory are connected by a snap-fit method. By providing a locking accessory on the end plate, the connector and the locking accessory of the end plate are fixedly connected by a snap-fit method. On the one hand, it is convenient to enhance the convenience of connecting the connector and the end plate during the subsequent assembly and fixing process of the battery cells, thereby improving the assembly efficiency of the battery device; on the other hand, it can reduce the generation of particles during the assembly process, thereby reducing the impact of particles on the insulation performance of the battery device.

[0049] The battery devices disclosed in the embodiments of this application can be used, but are not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. The battery devices disclosed in this application can be used to form a power supply system for such electrical equipment or energy storage devices, thereby improving assembly efficiency and reducing the impact of particles on the insulation performance of the power supply system.

[0050] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0051] An embodiment of the present application also provides an energy storage device that uses a battery device as a power source. The energy storage device may be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0052] For the convenience of description, the following embodiments are described by taking a vehicle 10 as an example of an electrical device according to an embodiment of the present application.

[0053] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of the vehicle provided for some embodiments of the present application. The vehicle 10 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 or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 10, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 10. The battery device 100 can be used to power the vehicle 10. For example, the battery device 100 can serve as an operating power source for the vehicle 10. The vehicle 10 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 10 during driving.

[0054] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 10 , but also as a driving power source for the vehicle 10 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10 .

[0055] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application. The battery device 100 includes a housing 110 and a battery cell 120, with the battery cell 120 being housed within the housing 110. The housing 110 is used to provide a storage space for the battery cell 120, and the housing 110 can adopt a variety of structures. In some embodiments, the housing 110 can include a first housing portion 111 and a second housing portion 112, the first housing portion 111 and the second housing portion 112 covering each other, and the first housing portion 111 and the second housing portion 112 jointly defining a storage space for accommodating the battery cell 120. The second box portion 112 can be a hollow structure with one end open, and the first box portion 111 can be a plate-like structure. The first box portion 111 covers the open side of the second box portion 112, so that the first box portion 111 and the second box portion 112 jointly define a storage space. The first box portion 111 and the second box portion 112 can also be hollow structures with one end open, and the open side of the first box portion 111 covers the open side of the second box portion 112. Of course, the box 110 formed by the first box portion 111 and the second box portion 112 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0056] In the battery device 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 120. The multiple battery cells 120 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 120 may be housed within the housing 110. Of course, the battery device 100 may also be a battery module formed by first connecting the multiple battery cells 120 in series, in parallel, or in a hybrid connection, and then the multiple battery modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery unit, which is then housed within the housing 110. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 120.

[0057] Each battery cell 120 may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0058] Please refer to Figure 3 , Figure 3 Schematic diagram of the decomposition structure of a battery cell provided in some embodiments of the present application. Battery cell 120 refers to the smallest unit that makes up a battery. Figure 3 The battery cell 120 includes an end cap 121 , a shell 122 , an electrode assembly 123 and other functional components.

[0059] The end cap 121 is a component that covers the opening of the housing 122 to isolate the internal environment of the battery cell 120 from the external environment. The shape of the end cap 121 can be adapted to the shape of the housing 122 to fit the housing 122. Optionally, the end cap 121 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 121 from deforming under pressure or collision, providing the battery cell 120 with greater structural strength and improved safety. The end cap 121 can be provided with functional components such as electrode terminals 1211. The electrode terminals 1211 can be used to electrically connect to the electrode assembly 123 to transfer electrical energy to or from the battery cell 120. In some embodiments, the end cap 121 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold. The end cap 121 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating member may be provided inside the end cap 121 to isolate the electrical connection components in the housing 122 from the end cap 121 to reduce the risk of short circuit.

[0060] The housing 122 is a component that cooperates with the end cap 121 to form the internal environment of the battery cell 120. This internal environment can accommodate the electrode assembly 123, electrolyte, and other components. The housing 122 and end cap 121 can be separate components. An opening can be provided in the housing 122, and the end cap 121 can be placed over the opening to form the internal environment of the battery cell 120. Alternatively, the end cap 121 and housing 122 can be integrated. Specifically, the end cap 121 and housing 122 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 122 is to be enclosed, the end cap 121 can be placed over the housing 122. The housing 122 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 122 can be determined based on the specific shape and size of the electrode assembly 123. The housing 122 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0061] The electrode assembly 123 is a component in the battery cell 120 where electrochemical reactions occur. One or more electrode assemblies 123 may be contained in the housing 122. The electrode assembly 123 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 1231. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs 1231 connect the electrode terminals to form a current loop.

[0062] Combine Figures 4 to 6 As shown, an embodiment of the present application provides a battery device 100, which includes a plurality of battery cells 120, an end plate 130 and a connecting assembly 140, the end plate 130 includes a first end plate 131 and a second end plate 132 arranged relatively spaced apart along a first direction, and the plurality of battery cells 120 are located between the first end plate 131 and the second end plate 132; the connecting assembly 140 includes at least one connecting member 141, the two ends of the connecting member 141 are respectively connected to the first end plate 131 and the second end plate 132, so that the end plate 130 clamps the plurality of battery cells 120 along the first direction; wherein, at least one of the first end plate 131 and the second end plate 132 is provided with a locking accessory, and the connecting member 141 is connected to the locking accessory by a snap-fit manner.

[0063] The battery device 100 includes a housing 110, which is a structure for accommodating battery cells 120. In some embodiments, multiple battery cells 120 form a battery module, and the accommodating cavity within the housing 110 provides space for multiple battery modules. This embodiment of the application does not limit this specific structure.

[0064] The battery module includes a plurality of battery cells 120, an end plate 130 and a connecting assembly 140. For ease of understanding, a coordinate system is established to assist in the description, such as Figure 4 As shown, the first direction X is a direction perpendicular to the largest side of the battery cell 120, the second direction Y is a horizontal direction perpendicular to the first direction X, and the third direction Z is a vertical direction perpendicular to both the first direction X and the second direction Y. The first direction X, the second direction Y, and the third direction Z do not distinguish between forward and reverse directions.

[0065] The end plates 130 are structures used to position and secure multiple arranged battery cells 120. The end plates 130 include a first end plate 131 and a second end plate 132. The first end plate 131 and the second end plate 132 are spaced relative to each other along a first direction X. The battery cells 120 are positioned between the first end plate 131 and the second end plate 132. The first end plate 131 and the second end plate 132 position and secure the multiple battery cells 120 in the first direction X. The spacing between the first end plate 131 and the second end plate 132 can be determined based on the number of battery cells 120 arranged between the first end plate 131 and the second end plate 132 along the first direction X, for example, 8, 10, 15, 20, etc. The materials of the first end plates 131 and the second end plates 132 can be determined based on actual needs, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0066] In some embodiments, the battery cells 120 are arranged in a single row between the first end plate 131 and the second end plate 132, and a plurality of battery cells 120 are arranged in a single row in the first direction X. The first end plate 131 and the second end plate 132 are in contact with the single battery cells 120 at the head and tail ends respectively.

[0067] In some embodiments, multiple columns of battery cells 120 are arranged between the first end plate 131 and the second end plate 132, for example, two columns, three columns, four columns, etc. The multiple columns of battery cells 120 are arranged along the second direction Y. A plurality of battery cells 120 in each column are arranged in the first direction X, and the first end plate 131 and the second end plate 132 respectively contact the battery cells 120 at the beginning and end of each column.

[0068] It should be noted that, depending on actual needs, in some embodiments, the first end plate 131 and the second end plate 132 may be provided with electrical connection points or interfaces for connecting to an external circuit. In some embodiments, the first end plate 131 and the second end plate 132 may be designed with a heat dissipation structure to assist in dissipating heat from the battery cell 120.

[0069] Connecting assembly 140 is a structure used to connect the first end plate 131 and the second end plate 132, so that the plurality of battery cells 120, the first end plate 131 and the second end plate 132 form a stable whole. Connecting assembly 140 includes a connector 141, one end of which is connected to the first end plate 131, and the other end of which is connected to the second end plate 132. The connection locations of connector 141 to the first end plate 131 and the second end plate 132 are not limited, such as the top, side, etc. The material of connector 141 can be determined according to actual needs, such as copper, iron, aluminum, stainless steel, and aluminum alloy.

[0070] The first end plate 131 and the second end plate 132 clamp multiple battery cells 120 along the first direction X, and the two ends of the connecting member 141 are fastened to the first end plate 131 and the second end plate 132 respectively. The end plates 130 and the connecting member 141 work together to form a stable frame structure, thereby enhancing the overall strength and rigidity of the battery module.

[0071] In some embodiments, the connection assembly 140 includes a single connection member 141 , and two ends of the connection member 141 are respectively connected to the first end plate 131 and the second end plate 132 .

[0072] In some embodiments, the connection assembly 140 includes a plurality of connectors 141. The specific number of connectors 141 can be determined based on actual needs, such as 3, 4, or 5. The plurality of connectors 141 are spaced apart along the second direction Y, and the two ends of each connector 141 are respectively connected to the first end plate 131 and the second end plate 132.

[0073] In some embodiments, the connection assembly 140 includes a plurality of connectors 141. The specific number of connectors 141 can be determined based on actual needs, such as 4, 6, 8, etc. The plurality of connectors 141 are spaced apart along the second direction Y. Some of the connectors 141 pass over the battery cells 120 and connect to the top of the first end plate 131 and the top of the second end plate 132, respectively; some of the connectors 141 pass under the battery cells 120 and connect to the bottom of the first end plate 131 and the bottom of the second end plate 132, respectively.

[0074] At least one of the first end plate 131 and the second end plate 132 is provided with a locking member, which is used to connect one end of the connector 141 to the end plate 130. The locking member's structure matches the end of the connector 141, and the two can be removably connected via a snap-fit mechanism. Examples include a flip-type snap-fit mechanism, a rotating snap-fit mechanism, and an insertable snap-fit mechanism. The material of the locking member can be determined based on actual needs, such as copper, iron, aluminum, stainless steel, and aluminum alloy.

[0075] In some examples, the first end plate 131 is provided with a locking attachment, one end of the connector 141 is connected to the locking attachment of the first end plate 131 by a snap-fit method, and the other end of the connector 141 is connected to the second end plate 132 by welding, riveting, or other means. In some examples, the second end plate 132 is provided with a locking attachment, one end of the connector 141 is connected to the locking attachment of the second end plate 132 by a snap-fit method, and the other end of the connector 141 is connected to the first end plate 131 by welding, riveting, or other means. In some examples, both the first end plate 131 and the second end plate 132 are provided with locking attachments, and the two ends of the connector 141 are connected to the locking attachments of the first end plate 131 and the second end plate 132, respectively, by a snap-fit method.

[0076] The snap-on connection may include but is not limited to an insert-on snap-on connection, a rotational snap-on connection, a flip-on snap-on connection, and the like.

[0077] In some embodiments, one end of the connector 141 is connected to the first end plate 131 through an insert-type snap-in connection, that is, the first end plate 131 is provided with a slot, and one end of the connector 141 is a protruding structure adapted to the slot. One end of the connector 141 is inserted into the slot of the first end plate 131, and the slot is used to limit one end of the connector 141, so that one end of the connector 141 is connected to the first end plate 131.

[0078] In some embodiments, one end of the connecting member 141 is connected to the first end plate 131 through a rotational snap-fit, that is, one end of the connecting member 141 is bent to form a slot, and a rotatable connecting fixing member is provided on the first end plate 131. For example, the connecting fixing member is rotationally connected to the first end plate 131 through a thread, and the rotating connecting fixing member inserts one end of the connecting fixing member into the slot, so that one end of the connecting member 141 is connected to the first end plate 131.

[0079] In some embodiments, one end of the connecting member 141 is connected to the first end plate 131 through a flip-type buckle, that is, one end of the connecting member 141 is bent to form a slot, and a flippable connecting fixing member is provided on the first end plate 131. One end of the connecting fixing member is flipped into the slot, so that one end of the connecting member 141 is connected to the first end plate 131.

[0080] By providing a locking accessory on the end plate 130, the connector 141 is fixedly connected to the locking accessory of the end plate 130 by snapping. On the one hand, it is convenient to enhance the convenience of connecting the connector and the end plate 130 during the subsequent assembly and fixation of the battery cell 120, thereby improving the assembly efficiency of the battery device 100; on the other hand, it can reduce the generation of particles during the assembly process, thereby reducing the impact of the particles on the insulation performance of the battery device 100.

[0081] According to some embodiments of the present application, the first end plate 131 is provided with a first locking accessory 150 for connecting to the connector 141, and the second end plate 132 is provided with a second locking accessory 160 for connecting to the connector 141; wherein, at least one of the first locking accessory 150 and the second locking accessory 160 is constructed so that the length when connected to the connector 141 is greater than the length when disconnected from the connector 141.

[0082] The first locking member 150 is a structure for connecting one end of the connecting member 141 to the first end plate 131 , and the second locking member 160 is a structure for connecting the other end of the connecting member 141 to the second end plate 132 .

[0083] At least one of the first locking member 150 and the second locking member 160 is ductile in its extension direction. When the first locking member 150 and the second locking member 160 are connected to both ends of the connector 141, at least one of the first locking member 150 and the second locking member 160 can undergo elastic deformation under tension, thereby making the length of the first locking member 150 and the second locking member 160 in the tensioned state greater than the length of the first locking member 150 and the second locking member 160 in the free state when not connected to the connector 141. The extended first locking member 150 and the second locking member 160 are in a tensioned state after being connected to the connector 141, thereby generating a tensile force on the first end plate 131 and the second end plate 132, thereby more reliably clamping the battery cell 120 in between.

[0084] The specific structure of the first locking member 150 and the second locking member 160 is not limited, and can include, for example, a flip-type elastic buckle structure, a rotating elastic buckle structure, a sliding elastic buckle structure, etc. The material of the first locking member 150 and the second locking member 160 can be determined according to actual needs, such as copper, iron, aluminum, stainless steel, and aluminum alloy.

[0085] In some embodiments, the first locking component 150 is ductile in its extension direction; in some embodiments, the first locking component 150 and the second locking component 160 are both ductile in their extension directions; in some embodiments, the first locking component 150, the second locking component 160 and the connecting member 141 are respectively ductile in their extension directions.

[0086] It should be noted that the first locking member 150 and the second locking member 160 can be extended to a length sufficient to meet the clamping force requirements of the first end plate 131 and the second end plate 132 . The specific extension length is not limited, for example, 1 mm, 2 mm, 3 mm, etc.

[0087] By connecting the first locking member 150 and the second locking member 160 to both ends of the connector 141 and utilizing the deformation of at least one of the first locking member 150 and the second locking member 160, a clamping force can be generated between the first end plate 131 and the second end plate 132, thereby helping to fit multiple battery cells and other components inside the battery module tightly.

[0088] According to some embodiments of the present application, the first end plate 131 is provided with a first locking accessory 150 for connecting to the connecting member 141, and the second end plate 132 is provided with a second locking accessory 160 for connecting to the connecting member 141; wherein, the connecting member 141 is constructed so that the length when connected to the first locking accessory 150 and the second locking accessory 160 is greater than the length when disconnected from the first locking accessory 150 and the second locking accessory 160.

[0089] The first locking member 150 is used to connect one end of the connector 141 to the first end plate 131, and the second locking member 160 is used to connect the other end of the connector 141 to the second end plate 132. The specific structures of the first and second locking members 150, 160 are not limited, and may include, for example, a protruding structure, a snap-fit structure, etc. The materials of the first and second locking members 150, 160 can be determined based on actual needs, such as copper, iron, aluminum, stainless steel, and aluminum alloy.

[0090] In some embodiments, the first locking member 150 is a raised portion on the top surface of the first end plate 131, and one end of the connecting member 141 is a circular through-hole that is inserted into the raised portion of the first end plate 131. In some examples, the first locking member 150 and the first end plate 131 can be integrally formed during the production process; in some examples, the first locking member 150 and the first end plate 131 can also be manufactured separately and subsequently connected using any feasible connection method, such as welding.

[0091] The connector 141 can be ductile in its extension direction. When its ends are connected to the first and second locking members 150, 160, respectively, it can undergo elastic deformation under tension, thereby making its length in the tensioned state greater than its length in the free state when its ends are not connected to the first and second locking members 150, 160. The extended connector 141 is in a tensioned state after being connected to the first and second end plates 131, 132, respectively, thereby generating a tensile force on the first and second end plates 131, 132, thereby more reliably clamping the battery cell 120 in between.

[0092] It should be noted that the connecting member 141 can be extended to a length that meets the requirement of generating the clamping force between the first end plate 131 and the second end plate 132 , and the specific extension length is not limited, for example, 2 mm, 3 mm, 4 mm, etc.

[0093] In some embodiments, the initial length of the two ends of the connecting member 141 is 200 mm, and the length of the two ends of the connecting member 141 after being connected to the first locking member 150 and the second locking member 160 is 202 mm.

[0094] By connecting the connecting piece 141 to the first locking component 150 of the first end plate 131 and the second locking component 160 of the second end plate 132, a clamping force can be generated between the first end plate 131 and the second end plate 132, which helps to fit multiple battery cells 120 and other components inside the battery module tightly, enhance the structural stability of the battery module, and improve its vibration and impact resistance.

[0095] According to some embodiments of the present application, Figure 6 As shown, the connecting member 141 includes a first connecting portion 170 for connecting to the first locking portion 150, and wherein the first locking portion 150 includes a fixed portion 151, a movable portion 152 and a locking portion 153, the fixed portion 151 is fixedly connected to the first end plate 131; the movable portion 152 is connected to the fixed portion 151 and can be flipped around the fixed portion 151; the locking portion 153 is movably connected to the movable portion 152, and the locking portion 153 adjusts the distance from the first connecting portion 170 as the movable portion 152 flips, and moves relative to the movable portion 152 for connecting to or separating from the first connecting portion 170.

[0096] The connecting member 141 has a first connecting portion 170 and a second connecting portion 180 at both ends. The first connecting portion 170 is connected to the first locking member 150 , and the second connecting portion 180 is connected to the second locking member 160 .

[0097] The fixing portion 151 is a structure within the first locking member 150 that is fixedly connected to the first end plate 131. It provides a stable support base for the first locking member 150, enabling the proper function of the movable portion 152 and the locking portion 153. The specific structure of the fixing portion 151 can be determined based on requirements, such as a square, rectangular, cylindrical, or similar shape, as long as it satisfies the requirements for the fixing portion 151 to be fixedly connected to the first end plate 131. Connection methods include gluing, threading, and the like. In some embodiments, the fixing portion 151 and the first end plate 131 are made of the same metal, such as aluminum alloy, or can be connected by welding.

[0098] The movable portion 152 is a structure within the first locking member 150 that can rotate relative to the fixed portion 151. It is used to rotate around the fixed portion 151 at a certain angle, thereby connecting or disconnecting the first locking member 150 from the connector 141. The connection method between the movable portion 152 and the fixed portion 151 is not limited, as long as it meets the requirements for rotation, such as a hinge, a rotating shaft, or other structural connection.

[0099] The latching portion 153 is a structure within the first locking member 150 that enables connection and disconnection. The latching portion 153 is movably connected to the movable portion 152. Tilting the movable portion 152 causes the latching portion 153 to rotate relative to the fixed portion 151, thereby adjusting the distance between the latching portion 153 and the first connecting portion 170. Furthermore, the latching portion 153 can move relative to the movable portion 152, for example, by flipping, rotating, or sliding relative to the movable portion 152. For example, when the movable portion 152 is flipped to a specific position, the latching portion 153 is rotated, causing the latching portion 153 to engage with the corresponding first connecting portion 170, achieving connection. For example, when the movable portion 152 is flipped to a specific position, the latching portion 153 is rotated, causing the latching portion 153 to separate from the corresponding first connecting portion 170, achieving disconnection. The specific structure of the latching portion 153 can be customized, such as a snap ring, a hook, or the like.

[0100] In some embodiments, the first locking component 150 is arranged on the top surface of the first end plate 131, and the plane where the top surface is located is parallel to the first direction X. The first locking component 150 is used to connect or disconnect with the first connecting portion 170 of the connecting member 141 through the top surface of the first end plate 131.

[0101] The first locking member 150 is formed by combining a fixed portion 151, a movable portion 152, and a locking portion 153. The connector 141 can be connected to or separated from the first locking member 150 by simply flipping the connector. This facilitates operation and improves the assembly efficiency of the battery device 100. Furthermore, the flip-type snap connection can withstand multiple flipping operations without affecting performance, allowing for repeated use and reducing costs.

[0102] According to some embodiments of the present application, Figures 6 to 8 As shown, the first locking accessory 150 is arranged on a side surface of the first end plate 131 facing away from the second end plate 132, and the first connecting portion 170 includes a first part 171 and a second part 172 connected to each other. The extension direction of the first part 171 intersects with the extension direction of the second part 172, and the end of the second part 172 away from the first part 171 is connected to the locking portion 153 by a snap-fit manner.

[0103] The first end plate 131 includes a first top surface 1311 and a first side surface 1312. The plane of the first top surface 1311 is parallel to the first direction X. The plane of the first side surface 1312 intersects the plane of the first top surface 1311. The angle between the two planes is not limited, and can be, for example, 45 degrees, 75 degrees, or 90 degrees. For ease of description, the following example is described in which the plane of the first side surface 1312 intersects the plane of the first top surface 1311 at right angles.

[0104] The first locking member 150 is disposed on a surface of the first end plate 131 facing away from the second end plate 132 . This can be understood as the first locking member 150 being disposed on the first side surface 1312 of the first end plate 131 .

[0105] The first connecting portion 170 includes a first part 171 and a second part 172, one end of the second part 172 is connected to the first part 171, and the other end is connected to the stopping portion 153 by a snap-fit manner, and the extension direction of the first part 171 intersects with the extension direction of the second part 172. It can be understood that the connecting member 141 passes over the battery cell 120, and then bends on the first side surface 1312 of the first end plate 131 and is connected to the first end plate 131 by a snap-fit manner.

[0106] In some embodiments, the connector 141 passes through the upper portion of the battery cell 120 and contacts the battery cell 120 to limit the battery cell 120 in the third direction Z.

[0107] By arranging the first locking component 150 on the side of the first end plate 131, the space on the top surface of the first end plate 131 can be avoided, which is helpful for the arrangement of the battery module. At the same time, the bent design of the connecting member 141 can, on the one hand, limit the first end plate 131 in the first direction X, and on the other hand, limit the battery cell 120 in the third direction Z.

[0108] According to some embodiments of the present application, Figure 7 and Figure 8 As shown, the second part 172 includes a main body 1721, a bending portion 1722 and a flange portion 1723. The main body 1721 is connected to the first part 171, and the extension direction of the first part 171 intersects with the extension direction of the main body 1721; the bending portion 1722 is connected to the end of the main body 1721 away from the first part 171; the flange portion 1723 is connected to the end of the bending portion 1722 away from the main body 1721 and is relatively spaced apart from the main body 1721 in a direction perpendicular to the extension direction of the main body 1721, so that the main body 1721, the bending portion 1722 and the flange portion 1723 are connected together to form a slot 1724 for accommodating the stopping portion; and wherein the stopping portion 153 is constructed to be able to enter or leave the slot 1724 over the flange portion 1723.

[0109] One end of the main body 1721 is connected to the first portion 171 , and the other end of the main body 1721 extends away from the first portion 171 . The extending direction of the first portion 171 intersects with the extending direction of the main body 1721 .

[0110] In some embodiments, the extension direction of the main body 1721 is parallel to the first side surface 1312 of the first end plate 131 , and the extension direction of the first portion 171 is parallel to the first top surface 1311 of the first end plate 131 .

[0111] The bent portion 1722 is a bent area of the second portion 172. One end of the bent portion 1722 is connected to the end of the main body 1721 away from the first portion 171. The bent structure of the bent portion 1722 forms a structure that can overlap and fix with the locking portion 153. The bent portion 1722 can be semicircular.

[0112] The flange portion 1723 is a restricting structure used to prevent the locking portion 153 from accidentally falling off. The flange portion 1723 is connected to the end of the bent portion 1722 away from the main body 1721, and is spaced relative to the main body 1721 in a direction perpendicular to the extension direction of the main body 1721. For example, if the main body 1721 extends in the third direction Z, the flange portion 1723 is spaced relative to the main body 1721 in a first direction X. It is understood that the flange portion 1723 can be parallel to the main body 1721 or non-parallel to it. For example, the distance between the flange portion 1723 and the main body 1721 along the first direction X gradually decreases as it moves away from the bent portion 1722, thereby helping to prevent the locking portion 153 from falling off. For example, the distance between the flange portion 1723 and the main body 1721 along the first direction X gradually increases as it moves away from the bent portion 1722, thereby helping to facilitate the locking portion 153 to flip into the locking slot 1724. The specific solution can be selected based on actual circumstances.

[0113] The main body 1721, the bending portion 1722 and the flange portion 1723 are connected together to form a slot 1724 for accommodating the locking portion. The structure of the slot 1724 is related to the structure of the bending portion 1722. The shape of the bending area of the bending portion 1722 is not limited. For example, if the shape of the bending area of the bending portion 1722 is an arc, then the slot 1724 corresponds to a circular arc slot; for example, if the shape of the bending area of the bending portion 1722 is a square, then the slot 1724 corresponds to a square slot.

[0114] It should be noted that the flange portion 1723 is a limiting structure for preventing the locking portion 153 from accidentally falling off, but it is necessary to ensure that the locking portion 153 can pass over the flange portion 1723 to enter or leave the slot 1724, that is, the stroke size of the locking portion 153 should be larger than the size of the flange portion 1723.

[0115] The main body 1721, the bent portion 1722, and the flange 1723 form a slot 1724 for mating with the latching portion 153. The latching portion 153 and the second portion 172 can be connected or disconnected by simply flipping the latching portion 153. This facilitates operation and improves the assembly efficiency of the battery device 100. The flange 1723 prevents the latching portion 153 from accidentally falling off, thereby improving the stability of the connection.

[0116] According to some embodiments of the present application, Figure 8 and Figure 9 As shown, when the locking portion 153 is connected to the first connecting portion 170, the shortest distance L1 between the bent portion 1722 and the fixed portion 151 is; when the locking portion 153 is separated from the first connecting portion 170, the shortest distance L2 between the bent portion 1722 and the fixed portion 151 is satisfied: 1.5mm≤(L2-L1)≤2.5mm.

[0117] When the first connecting portion 170 of the connecting member 141 is connected to the locking portion 153 of the first locking member 150, the connecting member 141 is in a tensioned state, and the shortest distance between the bending portion 1722 and the fixing portion 151 is L1, which is the distance between the bottom of the bending portion 1722 and the fixing portion 151.

[0118] When the first connecting portion 170 of the connecting member 141 is not connected to the locking portion 153 of the first locking member 150, the connecting member 141 is in a relaxed state, and the shortest distance between the bent portion 1722 and the fixed portion 151 is L2, which is the distance between the bottom of the bent portion 1722 and the fixed portion 151.

[0119] When the connector 141 changes from an unconnected, relaxed state to a connected, tensioned state, the size change of the bent portion 1722 from the fixed portion 151 is L2-L1. The larger the value of L2-L1, the greater the deformation of the connector 141. Excessively large deformation requires the retaining portion 153 to have a larger movement stroke, which increases the size requirements of the retaining portion 153 and reduces the ease of operation. Too small deformation may result in insufficient tension of the connector 141, and the retaining portion 153 may fall off, thereby affecting the stability of the connection between the first end plate 131 and the second end plate 132. Therefore, taking all factors into consideration, when the connector 141 changes from an unconnected, relaxed state to a connected, tensioned state, the size change of the bent portion 1722 from the fixed portion 151 is between 1.5 mm and 2.5 mm, specifically, for example, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, etc.

[0120] By comprehensively considering the convenience of the connection operation and the stability of the connection, the connector 141 changes from an unconnected relaxed state to a tensioned state after connection, and the size of the bending portion 1722 changes from the fixed portion 151 to between 1.5mm and 2.5mm. This can facilitate the connection between the locking portion 153 and the first connecting portion 170, while ensuring that the connector 141 is in a tensioned state, thereby improving the stability of the connection between the first end plate 131 and the second end plate 132, and can also limit the battery cell 120 in the third direction Z.

[0121] According to some embodiments of the present application, Figure 8 As shown, when the locking portion 153 is connected to the first connecting portion 170 , the distance L3 of the flange portion 1723 protruding from the vertex of the locking portion 153 satisfies: 4.5 mm≤L3≤5.5 mm.

[0122] The flange portion 1723 is a limiting structure for preventing the locking portion 153 from accidentally falling off, where the accidental falling off may be caused by vibration, shaking, impact, or the like.

[0123] When the first connecting portion 170 of the connecting member 141 is connected to the locking portion 153 of the first locking member 150, the connecting member 141 is in a tensioned state, and the locking portion 153 is located in the locking groove 1724 formed by the main body 1721, the bending portion 1722 and the flanging portion 1723. The distance between the flanging portion 1723 and the vertex of the locking portion 153 is L3, that is, the distance between the farthest end of the flanging portion 1723 and the vertex of the locking portion 153 is L3.

[0124] The greater the distance L3 that the flange portion 1723 protrudes from the vertex of the stop portion 153, the larger the dimension of the flange portion 1723 in the extension direction. If the dimension of the flange portion 1723 in the extension direction is too large, the stop portion 153 needs to have a larger movement stroke to be able to cross the flange portion 1723 and enter or exit the slot 1724, which increases the size requirement of the stop portion 153 and reduces the ease of operation. If the dimension of the flange portion 1723 in the extension direction is too small, the less the flange portion 1723 restricts the stop portion 153, and the probability of the stop portion 153 falling off increases, thereby affecting the stability of the connection between the first end plate 131 and the second end plate 132. Therefore, taking all factors into consideration, the distance L3 that the flange portion 1723 protrudes from the vertex of the stop portion 153 is between 4.5 mm and 5.5 mm, and specifically, for example, 4.5 mm, 4.8 mm, 5 mm, 5.5 mm, etc.

[0125] By comprehensively considering the convenience of the connection operation and the stability of the connection, the distance L3 of the flange portion 1723 protruding from the top of the locking portion 153 is between 4.5 mm and 5.5 mm, which can facilitate the locking portion 153 to pass over the flange portion 1723 to enter or leave the slot 1724. At the same time, the flange portion 1723 can also prevent the connecting piece 141 from falling off, thereby improving the stability of the connection between the first end plate 131 and the second end plate 132.

[0126] According to some embodiments of the present application, Figure 7 and Figure 8 As shown, the connecting member 141 includes an elastic portion 1411 , and the elastic portion 1411 is configured to be elastically deformed when subjected to tension, so that the length of the connecting member 141 increases.

[0127] The elastic portion 1411 is a structure that undergoes elastic deformation when subjected to tension, thereby increasing the length of the connector 141. The elastic portion 1411 can be positioned in any location, for example, in the first portion 171 or the second portion 172. The structure of the elastic portion 1411 is also not limited; for example, the elastic portion 1411 can be formed by providing a hollow structure, a flanged structure, or a folded structure on the connector 141 that facilitates elastic deformation.

[0128] In some embodiments, the two ends of the connecting member 141 are respectively connected to the first end plate 131 and the second end plate 132, the elastic portion 1411 will undergo elastic deformation to generate elastic tension, and the connecting member 141 is in a tensioned state, thereby generating a clamping force on the first end plate 131 and the second end plate 132.

[0129] By providing an elastic portion 1411 on the connecting member 141, when the two ends of the connecting member 141 are respectively connected to the first end plate 131 and the second end plate 132, the connecting member 141 generates elastic tension, so that a clamping force can be generated between the first end plate 131 and the second end plate 132, which helps to fit multiple battery cells 120 and other components inside the battery module tightly, thereby enhancing the structural stability of the battery module.

[0130] According to some embodiments of the present application, the elastic portion 1411 includes at least one hollow area, or the elastic portion 1411 includes a plurality of folds that are connected and arranged in parallel.

[0131] The elastic portion 1411 is a structure that undergoes elastic deformation when subjected to tension, thereby increasing the length of the connecting member 141. Any structure that can undergo elastic deformation meets the requirements of this application.

[0132] In some embodiments, the elastic portion 1411 includes a hollow area, that is, the hollow area is provided on the connector 141. The area of the connector 141 where the hollow area is located forms a structurally weak area. When an external force acts on the connector 141, the structurally weak area is easily elastically deformed. The structural shape of the hollow area is not limited, for example, a strip-shaped hollow area, a circular hollow area, etc. The number of hollow areas is not limited, for example, one, two, three, etc.

[0133] In some embodiments, the elastic portion 1411 includes a plurality of connected and parallel folds, that is, a plurality of connected and parallel folds are provided on the connector 141. The connected and parallel folds can be understood as a corrugated structure. When the connector 141 is subjected to external force, the folds can be expanded under the action of the external force to increase the length of the connector 141. When the connector 141 is not subjected to external force, the folds return to a folded state under the action of their own elastic force.

[0134] By providing a variety of structural designs for the elastic portion 1411 , it is possible to select a suitable extension structure according to actual conditions, thereby meeting the usage requirements of different scenarios.

[0135] According to some embodiments of the present application, Figure 7 and Figure 8 As shown, the elastic portion 1411 is disposed on the second portion 172 of the first connecting portion 170 .

[0136] The first connecting portion 170 includes a first part 171 and a second part 172. One end of the second part 172 is connected to the first part 171, and the extension direction of the first part 171 intersects with the extension direction of the second part 172. For the sake of convenience of description, the example in which the extension direction of the first part 171 intersects with the extension direction of the second part 172 perpendicularly is used for explanation.

[0137] In some embodiments, the first portion 171 extends in a direction parallel to the first direction X, and the second portion 172 extends in a direction parallel to the third direction Z. The second portion 172 of the connector 141 is connected to the first side surface 1312 of the first end plate 131 via a snap-fit mechanism. An elastic portion 1411 is disposed on the second portion 172. When subjected to tension, the elastic portion 1411 elastically deforms, placing the second portion 172 in a tensioned state. The second portion 172 can exert a pulling force on the first portion 171 in the third direction Z, thereby causing the first portion 171 to conform to the first top surface 1311 of the first end plate 131, and the connector 141 to conform to the top surface of the battery cell 120.

[0138] The pulling force of the second portion 172 helps the first portion 171 to fit with the first top surface 1311 of the first end plate 131 , and also helps the connector 141 to fit with the top surface of the battery cell 120 , thereby effectively limiting the battery cell 120 in the third direction Z.

[0139] According to some embodiments of the present application, Figure 10 As shown, the first locking member 150 and the second locking member 160 have the same structure.

[0140] The first locking accessory 150 is a structure for connecting one end of the connecting member 141 to the first end plate 131, and the second locking accessory 160 is a structure for connecting the other end of the connecting member 141 to the second end plate 132. The first locking accessory 150 is identical to the second locking accessory 160, which means that the structures at both ends of the connecting member 141 are also identical. One end of the connecting member 141 is connected to the first end plate 131 by a snap-fit manner, and the other end of the connecting member 141 is also connected to the second end plate 132 by a snap-fit manner.

[0141] In some embodiments, the first locking member 150 includes a fixed portion 151, a movable portion 152, and a locking portion 153. The fixed portion 151 is fixedly connected to the first end plate 131; the movable portion 152 is connected to the fixed portion 151 and can rotate around the fixed portion 151; the locking portion 153 is eccentrically disposed on the movable portion 152 relative to the fixed portion 151 and is configured to connect to and disconnect from the first connecting portion 170 by rotating the movable portion 152. The second locking member 160 also includes the same structure as the first locking member 150.

[0142] In some embodiments, the first locking member 150 and the second locking member 160 are respectively disposed on the top surface of the first end plate 131 and the top surface of the second end plate 132. In some embodiments, the first locking member 150 and the second locking member 160 are respectively disposed on the side surfaces of the first end plate 131 and the side surfaces of the second end plate 132. In some embodiments, the first locking member 150 is disposed on the side surface of the first end plate 131, and the second locking member 160 is disposed on the top surface of the second end plate 132.

[0143] By adopting the same structural design, mass production of parts is facilitated, and there is no need to distinguish directions during the assembly process. This can not only increase production speed and reduce production costs, but also help improve assembly efficiency.

[0144] According to some embodiments of the present application, Figure 4 As shown, the second locking member 160 is a fastener, which is threaded or riveted to the second end plate 132 .

[0145] The first locking member 150 is a structure for connecting the connecting member 141 to the first end plate 131 . One end of the connecting member 141 is snap-fitted to the first end plate 131 through the first locking member 150 .

[0146] The second locking member 160 is a structure for connecting the connecting member 141 to the second end plate 132. The other end of the connecting member 141 is connected to the second end plate 132 by a fastener. The fastener includes a bolt, a screw, a rivet, etc.

[0147] In some embodiments, the fastener is a bolt, the connecting member 141 is provided with a through hole, and the second end plate 132 is correspondingly provided with a threaded hole. The bolt passes through the through hole of the connecting member 141 and is connected to the threaded hole of the second end plate 132, so that the connecting member 141 is fixed to the second end plate 132.

[0148] In some embodiments, the fastener is a rivet, which passes through the connecting member 141 and is fixedly connected to the second end plate 132 , so that the connecting member 141 is fixed to the second end plate 132 .

[0149] In some embodiments, the material of the connecting member 141 is the same as that of the second end plate 132 , and the other end of the connecting member 141 can be welded to the second end plate 132 .

[0150] It should be noted that the connection between the connector 141 and the second end plate 132 can be performed before the battery cell 120 is installed. By connecting the connector 141 and the second end plate 132 in advance, on the one hand, the subsequent assembly time can be reduced. On the other hand, connection methods such as bolts, screws, and rivets may generate particles. Performing the operation before installing the battery cell 120 can process the generated particles and minimize the impact of the particles on the subsequent installation of the battery cell 120.

[0151] By using the second locking accessory 160 as a fastener, more connection methods are provided and the diversity of the connection methods is improved, so that a suitable connection method can be selected according to actual conditions to meet the connection and use requirements of different scenarios.

[0152] According to some embodiments of the present application, Figure 5 As shown, the connecting member 141 includes a first connecting portion 170 for connecting to the first end plate 131, a second connecting portion 180 for connecting to the second end plate 132, and a limiting portion 190 located between the first connecting portion 170 and the second connecting portion 180; wherein the limiting portion 190 abuts against any battery cell 120 among the multiple battery cells 120 to limit the multiple battery cells 120.

[0153] Connector 141 includes a first connecting portion 170, a second connecting portion 180, and a stopper 190. First connecting portion 170 is connected to first end plate 131, second connecting portion 180 is connected to second end plate 132, and both ends of stopper 190 are connected to first connecting portion 170 and second connecting portion 180, respectively. In some examples, first connecting portion 170, second connecting portion 180, and stopper 190 can be integrally formed during the production process.

[0154] In some embodiments, the top surface of the battery cell 120 is coplanar with the top surface of the first end plate 131 and the top surface of the second end plate 132, the contact surface of the first connecting portion 170 and the top surface of the first end plate 131, the contact surface of the second connecting portion 180 and the top surface of the second end plate 132, and the contact surface of the limiting portion 190 and the top surface of the battery cell 120 are coplanar.

[0155] In some embodiments, the top surface of the battery cell 120 is not coplanar with the top surface of the first end plate 131 and the top surface of the second end plate 132, and the limiting portion 190 is respectively connected to the first connection portion 170 and the second connection portion 180 at a bending structure, so that part of the first connection portion 170 is in contact with the top surface of the first end plate 131, part of the second connection portion 180 is in contact with the top surface of the second end plate 132, and the limiting portion 190 is in contact with the top surface of the battery cell 120.

[0156] By utilizing the limiting portion 190 to abut against any battery cell 120 , the connector 141 can provide additional support for the battery cell 120 , while cooperating with the first end plate 131 and the second end plate 132 to limit multiple battery cells 120 in multiple directions, thereby effectively improving the stability of the overall structure of the battery module.

[0157] According to some embodiments of the present application, Figure 5 As shown, the limiting portion 190 includes an inner core connected to the first connecting portion 170 and the second connecting portion 180 , and an elastic insulating portion 191 sleeved on the outer surface of the inner core. The elastic insulating portion 191 contacts the plurality of battery cells 120 .

[0158] The limiting portion 190 includes an inner core and an elastic insulating portion 191 . The two ends of the inner core are respectively connected to the first connecting portion 170 and the second connecting portion 180 . The material of the inner core can be the same as or different from that of the first connecting portion 170 and the second connecting portion 180 .

[0159] The elastic insulating portion 191 is fitted over the outer surface of the inner core. It serves to separate the inner core from the battery cells 120, minimizing current conduction through the inner core and reducing the likelihood of faults such as short circuits and leakage. Materials for the elastic insulating portion 191 include silicone rubber, EPDM rubber, and fluororubber. The elastic insulating portion 191 also has a certain degree of elasticity, providing a buffer against external shock or vibration.

[0160] By adopting the structural design of the elastic insulating part 191, on the one hand, the inner core can be effectively separated from the battery cell 120, reducing the probability of faults such as short circuit and leakage; on the other hand, the elastic insulating part 191 is elastic and can reduce the impact of the limiting part 190 squeezing the battery cell 120.

[0161] An embodiment of the present application provides an electrical device, including the battery device 100 in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0162] An embodiment of the present application provides an energy storage device, including the battery device 100 in any of the above embodiments, and the energy storage device is used to store electrical energy.

[0163] In some implementations, such as Figure 4 As shown, the battery device 100 includes a plurality of battery cells 120 , an end plate 130 and a connection assembly 140 .

[0164] The end plate 130 includes a first end plate 131 and a second end plate 132 that are spaced apart from each other along the first direction X. The plurality of battery cells 120 are located between the first end plate 131 and the second end plate 132 .

[0165] The first end plate 131 is provided with a first locking member 150, which is disposed on a surface of the first end plate 131 facing away from the second end plate 132. The first locking member 150 includes a fixed portion 151, a movable portion 152, and a locking portion 153. The fixed portion 151 is fixedly connected to the first end plate 131; the movable portion 152 is connected to the fixed portion 151 and can rotate around the fixed portion 151; and the locking portion 153 is movably connected to the movable portion 152.

[0166] The second end plate 132 is provided with a second locking member 160 . The second locking member 160 is a fastener that is threaded or riveted to the top surface of the second end plate 132 .

[0167] The connecting assembly 140 includes a plurality of connecting members 141 arranged at intervals along the second direction Y. The connecting member 141 includes a first connecting portion 170 for connecting to the first end plate 131 , a second connecting portion 180 for connecting to the second end plate 132 , and a limiting portion 190 located between the first connecting portion 170 and the second connecting portion 180 .

[0168] The first connecting portion 170 includes a first portion 171 and a second portion 172 connected to each other. An extending direction of the first portion 171 intersects with an extending direction of the second portion 172 .

[0169] The second part 172 includes a main body 1721, a bending portion 1722 and a flange portion 1723. The main body 1721 is connected to the first part 171, and the extension direction of the first part 171 intersects with the extension direction of the main body 1721; the bending portion 1722 is connected to the end of the main body 1721 away from the first part 171; the flange portion 1723 is connected to the end of the bending portion 1722 away from the main body 1721 and is relatively spaced apart from the main body 1721 in a direction perpendicular to the extension direction of the main body 1721, so that the main body 1721, the bending portion 1722 and the flange portion 1723 are connected together to form a slot 1724 for accommodating the stopping portion 153; and wherein the stopping portion 153 is constructed to be able to enter or leave the slot 1724 over the flange portion 1723.

[0170] The limiting portion 190 abuts against any of the multiple battery cells 120 to limit the position of the multiple battery cells 120. The limiting portion 190 includes an inner core connected to the first connecting portion 170 and the second connecting portion 180, and an elastic insulating portion 191 sleeved on the outer surface of the inner core. The elastic insulating portion 191 contacts the multiple battery cells 120.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Multiple battery cells; end plates, comprising a first end plate and a second end plate spaced apart from each other along a first direction, wherein the plurality of battery cells are located between the first end plate and the second end plate; and a connecting assembly comprising at least one connecting member, wherein two ends of the connecting member are respectively connected to the first end plate and the second end plate, so that the end plates clamp the plurality of battery cells along the first direction; Wherein, at least one of the first end plate and the second end plate is provided with a locking accessory, and the connecting member is connected to the locking accessory by snapping.

2. The battery device according to claim 1, wherein: The first end plate is provided with a first locking accessory for connecting with the connecting member, and the second end plate is provided with a second locking accessory for connecting with the connecting member; Wherein, at least one of the first locking member and the second locking member is configured such that a length thereof when connected to the connecting member is greater than a length thereof when disconnected from the connecting member.

3. The battery device according to claim 1, wherein: The first end plate is provided with a first locking accessory for connecting with the connecting member, and the second end plate is provided with a second locking accessory for connecting with the connecting member; The connecting member is configured such that a length of the connecting member when connected to the first locking member and the second locking member is greater than a length of the connecting member when disconnected from the first locking member and the second locking member.

4. The battery device according to claim 3, characterized in that The connecting member includes a first connecting portion for connecting with the first locking member, and wherein the first locking member includes: a fixing portion, fixedly connected to the first end plate; a movable portion connected to the fixed portion and capable of turning around the fixed portion; and The locking portion is movably connected to the movable portion, and the locking portion adjusts the distance from the first connecting portion as the movable portion flips, and moves relative to the movable portion to be connected to or separated from the first connecting portion.

5. The battery device according to claim 4, characterized in that The first locking accessory is arranged on a side surface of the first end plate facing away from the second end plate, and the first connecting part includes a first part and a second part that are connected, the extension direction of the first part intersects with the extension direction of the second part, and the end of the second part away from the first part is connected to the locking part by a snap-fit manner.

6. The battery device according to claim 5, characterized in that The second part includes: a main body connected to the first portion, wherein an extension direction of the first portion intersects with an extension direction of the main body; a bent portion connected to an end of the main body away from the first portion; and a flange portion connected to an end of the bent portion away from the main portion and spaced relative to the main portion in a direction perpendicular to the extending direction of the main portion, so that the main portion, the bent portion and the flange portion are connected together to form a slot for accommodating the locking portion; And wherein, the locking portion is configured to be able to cross the flange portion and enter or leave the locking slot.

7. The battery device according to claim 6, characterized in that When the locking portion is connected to the first connecting portion, the shortest distance between the bent portion and the fixed portion is L1; when the locking portion is separated from the first connecting portion, the shortest distance between the bent portion and the fixed portion is L2, and the following conditions are satisfied: 1.5mm≤(L2-L1)≤2.5mm.

8. The battery device according to claim 6, characterized in that When the locking portion is connected to the first connecting portion, a distance L3 of the flange portion protruding from the apex of the locking portion satisfies the following conditions: 4.5 mm ≤ L3 ≤ 5.5 mm.

9. The battery device according to claim 5, characterized in that: The connecting member includes an elastic portion configured to be elastically deformed when stretched so as to increase the length of the connecting member.

10. The battery device according to claim 9, characterized in that The elastic portion includes at least one hollow area, or The elastic portion includes a plurality of pleats that are connected and arranged in parallel.

11. The battery device according to claim 9, characterized in that The elastic portion is disposed at the second portion of the first connecting portion.

12. The battery device according to any one of claims 2 to 11, characterized in that: The first locking component and the second locking component have the same structure.

13. The battery device according to any one of claims 3 to 11, characterized in that: The second locking component is a fastener, and the fastener is threaded or riveted to the second end plate.

14. The battery device according to any one of claims 1 to 11, characterized in that: The connecting member includes a first connecting portion for connecting to the first end plate, a second connecting portion for connecting to the second end plate, and a limiting portion located between the first connecting portion and the second connecting portion; The limiting portion abuts against any one of the plurality of battery cells to limit the plurality of battery cells.

15. The battery device according to claim 14, characterized in that The limiting portion includes an inner core connected to the first connecting portion and the second connecting portion, and an elastic insulating portion sleeved on an outer surface of the inner core, wherein the elastic insulating portion contacts the plurality of battery cells.

16. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 15, and the battery device is used to provide electrical energy.

17. An energy storage device, characterized in that: The energy storage device comprises the battery device according to any one of claims 1 to 15, and the energy storage device is used to store electrical energy.

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