Battery device and electric device

Abstract

This application provides a battery device and an electrical device, including: a frame with a first opening and a second opening located on opposite sides in a first direction and interconnected; a cover connected to the frame and closing the first opening; a base plate connected to the frame and closing the second opening, the base plate, frame, and cover together forming an accommodating space; a battery cell assembly housed in the accommodating space, the battery cell assembly including a plurality of battery cells arranged along a second direction; and a limiting component housed in the accommodating space, the limiting component including a first limiting member extending along the second direction, the first limiting member being located between the frame and the battery cell assembly adjacent to the frame in a third direction, and connected to both the frame and the battery cell assembly, the top edge of the portion of the frame adjacent to the first limiting member along the first direction being lower than the top edge of the first limiting member along the first direction. This allows for a lighter battery device while improving the battery device's resistance to compression.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In battery technology, the structural and mechanical properties of battery devices are crucial, directly affecting their safety, reliability, and lifespan. Therefore, improving battery device performance is a pressing technical challenge. Utility Model Content

[0004] This application provides a battery device and an electrical device that can make the battery device lighter while improving its resistance to compression.

[0005] In a first aspect, a battery device is provided, including a frame, a cover, a base plate, a battery cell assembly, and a limiting assembly. The frame has a first opening and a second opening, located on opposite sides in a first direction and communicating with each other. The cover is connected to the frame and closes the first opening. The base plate is connected to the frame and closes the second opening, the base plate, frame, and cover together forming a receiving space. The battery cell assembly is received in the receiving space, and the battery cell assembly includes a plurality of battery cells arranged along a second direction. The limiting assembly is received in the receiving space and includes a first limiting member extending along the second direction. In a third direction, the first limiting member is located between the frame and the battery cell assembly adjacent to the frame, and is connected to both the frame and the battery cell assembly. The portion of the frame adjacent to the first limiting member along the first direction has its top point lower than the top point of the first limiting member along the first direction. The first direction, the second direction, and the third direction are mutually perpendicular, and the height direction of the frame and the first limiting member is the same as the first direction.

[0006] In this embodiment, by providing a first limiting member between the frame and the battery cell assembly, and with the height of the first limiting member higher than the height of the frame in the first direction, compared to setting the height of the frame higher for limiting in the first direction, the solution in this embodiment uses the first limiting member for limiting and reduces the height of the frame, thereby reducing the weight of the battery device and making the battery device lighter. Furthermore, the first limiting member can limit the movement of the battery cell assembly, reducing wear and tear, and thus extending its service life. Furthermore, the connection between the first limiting member and the frame and the battery cell assembly increases the stability and structural strength of the first limiting member, resisting external impacts, vibrations, or compression. Furthermore, when the battery device experiences lateral compression, the first limiting member can act as a buffer, reducing the compression on the battery cell assembly.

[0007] In some embodiments, in the first direction, the ratio H1 of the height of the portion of the frame adjacent to the first limiting member to the height of the first limiting member is in the range of 0.2≤H1≤0.8.

[0008] In this embodiment, the ratio H1 of the height of the portion of the frame adjacent to the first limiting member to the height of the first limiting member is set within this range. This can increase the stability and structural strength of the first limiting member, thereby limiting the battery cell assembly. At the same time, the frame height can be reduced to reduce the weight of the battery device, thus achieving lightweighting of the battery device. Furthermore, when the battery device is subjected to lateral extrusion, the first limiting member can act as a buffer to reduce the compression on the battery cell assembly.

[0009] In some embodiments, the bottom end of the first limiting member along the first direction is higher than the bottom end of the battery cell assembly adjacent to the first limiting member along the first direction.

[0010] In this embodiment, the bottom end of the first limiting member along the first direction is higher than the bottom end of the battery cell assembly adjacent to the first limiting member along the first direction, which can reserve an assembly tolerance gap to facilitate assembly. In addition, the gap can be used as a filling space to connect the battery cell, the first limiting member and the frame together, thereby increasing the overall stability and structural strength of the battery device.

[0011] In some embodiments, the limiting components and / or battery cell components are mounted on the frame.

[0012] In the embodiments of this application, the limiting component and / or battery cell assembly are mounted on the frame. The limiting component can restrict the movement of the battery cell assembly while bearing the weight of the battery cell assembly, thus making the overall structure lightweight. In addition, when the battery device is subjected to external impacts or other problems, the limiting component can play a buffering role, protecting the battery cell assembly and thereby improving the performance of the battery device.

[0013] In some embodiments, the frame includes an interconnected frame portion and an extension portion located on the side of the frame portion facing the receiving space, wherein a cover is connected to the frame portion, and a limiting component and / or a battery cell assembly is mounted on the extension portion.

[0014] In the embodiments of this application, the limiting component and / or the battery cell assembly are mounted on the extension. During the compression process, the extension and the limiting component work together to resist external impacts and vibrations or compression, protecting the battery cell assembly and improving the limiting function of the battery cell assembly.

[0015] In some embodiments, the base plate is connected to the frame portion and / or the extension portion, with the base plate located on the side of the extension portion away from the limiting component.

[0016] In this embodiment, the base plate is connected to the frame and / or extension. The base plate is located on the side of the extension away from the limiting component, allowing the limiting component and the extension to support the weight of the individual battery cells, thus reducing the overall weight of the battery device and improving its performance. Furthermore, the weight-bearing function of the limiting component and the extension reduces the rigidity requirements of the base plate, facilitating its weight reduction and further reducing the overall weight of the battery device. Additionally, the base plate's location on the side of the extension away from the limiting component allows the limiting component to act as a buffer in the event of external impacts, protecting the individual battery cells and improving the device's safety.

[0017] In some embodiments, the limiting component further includes a second limiting member extending along a second direction and connected to the frame, with the battery cell assembly mounted on the second limiting member. In this embodiment, the battery cell assembly can be limited by the connection between the second limiting member and the frame, improving the limiting function and reducing movement of the battery cell assembly. Furthermore, the connection between the second limiting member and the frame increases the overall stability and structural strength of the limiting component, resisting external impacts, vibrations, or compression, and improving the compression resistance of the battery device. Furthermore, the battery cell assembly mounted on the second limiting member allows the second limiting member to also bear the weight of the battery cell assembly. Additionally, when the battery device is subjected to external impacts or other problems, the supporting component can act as a buffer, protecting the battery cell assembly and thus improving the safety performance of the battery device.

[0018] In some embodiments, the battery device includes a plurality of battery cell assemblies arranged along a third direction, and the limiting assembly further includes a plurality of second limiting members, which are spaced apart along a third direction; wherein two adjacent battery cell assemblies are connected to the same second limiting member.

[0019] In this embodiment, when the battery device includes multiple battery cell assemblies, connecting two adjacent battery cell assemblies to the same second limiting member can further improve the limiting function and enhance the structural stability of the battery cell assemblies. Additionally, the second limiting member can also support the battery cell assemblies.

[0020] In some embodiments, in the second direction and / or the third direction, the adjacent walls of two adjacent battery cells are bonded together.

[0021] In this embodiment, the adjacent walls of two battery cells are bonded together, which enhances the structural stability and mechanical fixation of the battery cells while achieving overall lightweighting of the battery cell assembly, thus realizing overall lightweighting of the battery device. Furthermore, this design can also improve the overall energy density of the battery device.

[0022] In some embodiments, the limiting component further includes a third limiting member extending along a second direction, located between two adjacent battery cell assemblies, and connected to the battery cell assembly and the frame.

[0023] In this embodiment, the third limiting member is located between the sidewalls of two adjacent battery cell assemblies and is connected to both the battery cell assembly and the frame. It can limit the movement of each battery cell assembly, further enhancing the limiting function and reducing movement, thereby improving the stability and safety of the battery device. Furthermore, when the battery device experiences lateral compression, the third limiting member can act as a buffer, reducing the pressure on the battery cell assembly. Additionally, the third limiting member can work together with the second limiting member to limit the battery cell assembly, reducing movement in all directions and further enhancing the limiting function.

[0024] In some embodiments, the limiting component further includes a fourth limiting member extending along a second direction, the fourth limiting member being located between the battery cell assembly and the cover, and abutting against the wall of the battery cell facing the cover.

[0025] In this embodiment, the fourth limiting member is located between the battery cell assembly and the cover, and abuts against the wall of the battery cell facing the cover, which can reduce the movement of the battery cell assembly in the first direction and limit the movement of the battery cell assembly. Furthermore, the fourth limiting member and the second limiting member can jointly limit the movement of the battery cell assembly in the first direction, thereby improving the limiting function. Furthermore, the fourth limiting member, the second limiting member, and the third limiting member can further limit the movement of the battery cell assembly in the first and third directions, and increase the overall stability and structural strength of the limiting assembly, resisting external impacts, vibrations, or compression.

[0026] In some embodiments, the limiting assembly includes a first limiting member and a second limiting member that have overlapping portions projected in a first direction and are interconnected; and / or, the limiting assembly includes a first limiting member and a fourth limiting member that have overlapping portions projected in a first direction and are interconnected; and / or, the limiting assembly includes a third limiting member and a second limiting member that have overlapping portions projected in a first direction and are interconnected and are interconnected; and / or, the limiting assembly includes a third limiting member and a fourth limiting member that have overlapping portions projected in a first direction and are interconnected and are interconnected and are interconnected.

[0027] In this embodiment, in the first direction, the first and second limiting members with overlapping projections are interconnected, which can jointly restrict the movement of the battery cell assembly in the first and third directions, increasing the overall stability and structural strength of the limiting assembly and resisting external impacts, vibrations, or compression. Furthermore, in the first direction, the first and fourth limiting members with overlapping projections are interconnected, which can also jointly restrict the movement of the battery cell assembly in the first and third directions, increasing the overall stability and structural strength of the limiting assembly and resisting external impacts, vibrations, or compression, thus improving the compression resistance of the battery device. Furthermore, in the first direction, the third and second limiting members with overlapping projections are interconnected, which can also jointly restrict the movement of the battery cell assembly in the first and third directions, increasing the overall stability and structural strength of the limiting assembly and resisting external impacts, vibrations, or compression. Furthermore, in the first direction, the third and fourth limiting members with overlapping projections are interconnected, which can also jointly restrict the movement of the battery cell assembly in the first and third directions, increasing the overall stability and structural strength of the limiting assembly and resisting external impacts, vibrations, or compression.

[0028] In some embodiments, the cover and the frame are connected by adhesive bonding or thermal fusion; and / or, the base plate and the frame are connected by adhesive bonding or thermal fusion.

[0029] In this embodiment, the cover and frame are connected by adhesive bonding or heat fusion, and / or the base plate and frame are connected by adhesive bonding or heat fusion. When the cover or base plate cracks or is damaged due to stone impact or other issues during use and needs to be replaced, the connection between it and the frame can be broken by secondary heat fusion or other methods, and then reconnected by adhesive bonding or heat fusion. This can improve the maintainability of the battery device and thus improve its performance. In addition, the adhesive bonding or heat fusion connection between the cover and frame, and / or the base plate and frame can quickly achieve a fusion connection between the two, which facilitates sealing between them.

[0030] In some embodiments, the limiting component is connected to the frame by adhesive bonding and / or by connectors; and / or, the limiting component is connected to the battery cell assembly by adhesive bonding or thermal fusion bonding.

[0031] In this embodiment, the limiting component and the frame are connected by a connector, which improves the connection strength between them, making the limiting component more stable and providing better limiting effect. Alternatively, the limiting component and the frame are connected by adhesive bonding; and / or the limiting component and the battery cell assembly are connected by adhesive bonding or thermal fusion bonding. This improves the connection strength and allows for quick replacement of the faulty component without damaging other components in the event of a failure in one part, improving the maintainability of the battery device and thus enhancing its performance.

[0032] In some embodiments, the battery cell has a first wall, which is the wall with the largest area in the battery cell, and a second direction is a direction perpendicular to the first wall.

[0033] In this embodiment, the first limiting member and the third limiting member extend along a second direction, which is perpendicular to the first wall. That is, the first limiting member and the third limiting member are located on other walls except the wall with the largest area of ​​the battery cell. The expansion force generated by the battery cell is on the wall with the largest area, so the expansion force can be reduced from damaging the first limiting member and the third limiting member, and the limiting function of the first limiting member and the third limiting member on the battery cell assembly can be improved.

[0034] In some embodiments, the limiting component has a flow channel through which a heat exchange medium passes to regulate the temperature of the battery device.

[0035] In this embodiment, the limiting component not only restricts the movement of individual battery cells and reduces compression of them, but also has internal flow channels for the heat exchange medium to circulate, thereby regulating the temperature of the battery device. Furthermore, the limiting component has flow channels for the heat exchange medium, meaning it is a hollow structure with good tensile strength, which can more effectively disperse and unload the expansion force generated by the battery cells along the second direction. In addition, integrating the temperature regulation function into the limiting component saves space compared to a separate temperature regulation system, making the battery device more compact and improving its energy density.

[0036] In some embodiments, a pressure relief mechanism is provided on the wall of the battery cell facing the base plate, and a gap space is formed between the pressure relief mechanism and the base plate, with the pressure relief mechanism and the gap space being disposed opposite to each other.

[0037] In this embodiment, a space is formed between the pressure relief mechanism and the base plate, and the pressure relief mechanism and the space are arranged opposite to each other. When the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism is actuated to release the internal pressure or temperature. The pressure or temperature of the battery cell can be efficiently released through the space, thereby protecting the battery cell and improving the safety performance of the battery device.

[0038] In some embodiments, a plurality of weak zones are provided on the base plate, and the plurality of weak zones are provided corresponding to the pressure relief mechanisms of a plurality of battery cells. The weak zones are configured to be damaged when the pressure and / or temperature inside the battery cell reaches a predetermined threshold.

[0039] In this embodiment, a weak area is provided on the base plate, corresponding to the pressure relief mechanism of the battery cell. This allows for faster release of pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold, thereby protecting the battery cell and improving the safety performance of the battery device.

[0040] In some embodiments, the battery device further includes a strap that surrounds the battery cell assembly and is located on the side of the first limiting member away from the base plate, and the strap and the limiting member are spaced apart in a first direction.

[0041] In this embodiment, the battery cell assembly is fixedly mounted around a strap, with the strap and the limiting component spaced apart in a first direction. This secures the battery cell assembly and assists the first limiting component in restricting its movement, reducing the risk of damage caused by vibration, impact, or accidental collisions. It also reduces the risk of leakage or thermal runaway. Furthermore, tightly binding the battery cell assembly together with the strap allows for more efficient use of space and increases the energy density of the battery cell assembly. Additionally, the strap is located on the side of the first limiting component away from the base plate, and the spaced-apart arrangement of the strap and the limiting component in the first direction ensures that they are separated and do not interfere with each other.

[0042] In some embodiments, the battery cell assembly is connected to the cover.

[0043] In this embodiment, the battery cell assembly is connected to the cover, and the cover bears part of the weight of the battery cell assembly, so that the weight of the battery cell assembly is not entirely concentrated on the limiting component and the frame, thereby reducing the supporting burden on the limiting component and the frame. In addition, the connection between the battery cell assembly and the cover can reduce the movement of the battery cell assembly in the first direction and improve the stability of the battery cell assembly.

[0044] In a second aspect, an electrical device is provided, comprising a battery device according to any one of the first aspects, wherein the battery device provides electrical energy to the electrical device.

[0045] In this embodiment, the battery device is made lighter overall and its compression resistance is improved by setting a frame that is lower than the limiting component, thereby improving the battery device's battery life. Attached Figure Description

[0046] Figure 1A schematic diagram of the structure of a vehicle provided in one embodiment of this application is shown.

[0047] Figure 2 An exploded view of a battery device provided in one embodiment of this application is shown.

[0048] Figure 3 A cross-sectional schematic diagram of a battery device provided in another embodiment of this application is shown.

[0049] Figure 4 A partial cross-sectional schematic diagram of a battery device provided in another embodiment of this application is shown.

[0050] Figure 5 A schematic diagram of the structure of a battery device provided in another embodiment of this application is shown.

[0051] Figure 6 A schematic diagram of the structure of a battery device provided in another embodiment of this application is shown.

[0052] Figure 7 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0053] Figure 8 A schematic diagram of the structure of a limiting component provided in another embodiment of this application is shown.

[0054] Figure 9 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0055] Figure 10 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0056] Figure 11 A cross-sectional schematic diagram of a battery device provided in another embodiment of this application is shown.

[0057] Figure 12 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0058] Figure 13 A cross-sectional schematic diagram of a battery device provided in another embodiment of this application is shown.

[0059] Figure 14 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0060] Figure 15 A partial structural schematic diagram of a battery device provided in another embodiment of this application is shown.

[0061] Figure 16 A cross-sectional schematic diagram of a battery device provided in another embodiment of this application is shown.

[0062] Figure 17 A schematic diagram of the structure of a base plate provided in an embodiment of this application is shown. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0065] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0069] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0070] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0071] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0072] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0073] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0074] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0075] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0076] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0077] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0078] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0079] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0080] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0081] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0082] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0083] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0084] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0085] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0086] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0087] In some embodiments, the battery device may include a busbar component, which can be used to achieve electrical connection between multiple battery cells, such as in parallel, series, or mixed connections. Specifically, the busbar component can achieve electrical connection between battery cells by connecting to the electrode terminals of the battery cells; alternatively, the busbar component can also achieve electrical connection between battery cells by connecting to other components of the battery cells. The busbar component can be fixed to corresponding components of the battery cells by welding, for example, by welding to electrode terminals, sealing structures, or housings, etc., and the embodiments of this application are not limited thereto.

[0088] With increasing environmental pollution, the new energy industry is attracting more and more attention. Battery technology is a crucial factor in the development of this industry. In the development of battery technology, to reduce the risk of battery device damage during side extrusion, which could lead to sealing failure and maintenance difficulties, the overall strength of the battery device frame is typically increased to prevent damage during side extrusion, for example, by increasing the frame height. However, excessive frame height increases the overall weight of the battery device.

[0089] Based on the above considerations, in order to reduce the weight of the battery device, making the overall battery device lightweight, and to improve the compression resistance of the battery device, the height of the frame can be reduced while a first limiting member is set to limit the battery device to improve the compression resistance. This application provides a battery device, including a frame, a cover, a base plate, a battery cell assembly, and a limiting member. The frame has a first opening and a second opening, which are located on opposite sides in a first direction and are interconnected. The cover is connected to the frame and closes the first opening. The base plate is connected to the frame and closes the second opening. The base plate, frame, and cover together form an accommodating space. The battery cell assembly is accommodated in the accommodating space, and the battery cell assembly includes a plurality of battery cells arranged along a second direction. The limiting member is accommodated in the accommodating space and includes a first limiting member that extends along the second direction. In a third direction, the first limiting member is located between the frame and the battery cell assembly adjacent to the frame, and is connected to both the frame and the battery cell assembly. The top of the portion of the frame adjacent to the first limiting member along the first direction is lower than the height of the first limiting member along the first direction. Among them, the first direction, the second direction and the third direction are perpendicular to each other, and the height direction of the frame and the first limiting member is the same as the first direction.

[0090] Compared to limiting the height of the frame in the first direction, the solution in this embodiment uses a first limiting member to reduce the frame height and thus reduce the weight of the battery device. Furthermore, the first limiting member can limit the movement of individual battery cells. Furthermore, the connection between the first limiting member and the frame and the individual battery cells increases the stability and structural strength of the first limiting member, resisting external impacts, vibrations, or compression. Furthermore, when the battery device experiences lateral compression, the first limiting member can act as a buffer, reducing the compression on the individual battery cells.

[0091] The technical solutions described in the embodiments of this application are applicable to various battery-powered electrical devices. For example, these devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0092] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments will be described in detail using a vehicle as an example of electrical equipment.

[0093] For example, such as Figure 1 As shown, Figure 1 This illustration shows a structural diagram of a vehicle 1 according to an embodiment of this application. The vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The interior of the vehicle 1 can include a motor 40, a controller 30, and a battery device 10. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be located at the bottom, front, or rear of the vehicle 1. The battery device 10 can be used to power the vehicle 1. For example, the battery device 10 can serve as the operating power source for the vehicle 1's electrical system, or it can be used to meet the power requirements for starting, navigation, and operation of the vehicle 1. In some implementations of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1.

[0094] Figure 2 An exploded view of the battery device 10 provided in one embodiment of this application is shown. Figure 3 A cross-sectional schematic diagram of a battery device 10 provided in another embodiment of this application is shown. Figure 4 A partial cross-sectional schematic diagram of a battery device 10 according to another embodiment of this application is shown. Exemplary, Figure 3 for Figure 2 Cross-sectional view, Figure 4 for Figure 3 A partial schematic diagram.

[0095] It should be understood that, for ease of description, the embodiments in this application are described as follows: Figures 2 to 4 As shown, taking the battery device 10 in the figure as an example, the first direction Z can be the height direction of the battery device 10, and the first direction Z is perpendicular to the second direction X and the third direction Y. Alternatively, the first direction Z can also be the thickness direction of the base plate 60, or the first Z direction can be the thickness direction of the battery cell 20. The second direction X can be the length direction of the battery device 10, or the second direction X can also be the length direction of the base plate 60, or the second direction X can also be the length direction of the cover 11, or the second direction X can also be the arrangement direction of the battery cells 20, or the second X direction can be the width direction of the battery cell 20. The third direction Y can be the width direction of the battery device 10, or the third direction Y can also be the width direction of the base plate 60, or the third direction Y can also be the width direction of the cover 11. It should also be understood that the directional descriptions of all figures in the embodiments of this application are consistent with the descriptions of the battery device 10. Figures 2 to 4 The directional descriptions are consistent with those in the text, and will not be repeated hereafter.

[0096] In some implementations, such as Figures 2 to 4As shown, the battery device 10 includes a frame 50, a cover 11, a base plate 60, a battery cell assembly 70, and a limiting component 80. The frame 50 has a first opening and a second opening, located on opposite sides of a first direction Z and communicating with each other. The cover 11 is connected to the frame 50 and closes the first opening. The base plate 60 is connected to the frame 50 and closes the second opening. The base plate 60, frame 50, and cover 11 together form a receiving space. The battery cell assembly 70 is received within the receiving space and includes a plurality of battery cells 20 arranged along a second direction X. A limiting component 80 is accommodated in an accommodating space. The limiting component 80 includes a first limiting member 81, which extends along a second direction X. In a third direction Y, the first limiting member 81 is located between a frame 50 and a battery cell assembly 70 adjacent to the frame 50, and is connected to both the frame 50 and the battery cell assembly 70. The top of the portion of the frame 50 adjacent to the first limiting member 81 along a first direction Z is lower than the top of the first limiting member 81 along the first direction. The first direction Z, the second direction X, and the third direction Y are all perpendicular to each other, and the height direction of the frame 50 and the first limiting member 81 is the same as that of the first direction Z.

[0097] The battery cell assembly 70 of this application embodiment may include one or more battery cells 20. In addition, the shape of the battery cell 20 in this application embodiment can be set according to the actual application. For example, the battery cell 20 can be cylindrical, or it can be cuboid or other shapes. This application embodiment is not limited to this.

[0098] In some embodiments, to improve the space utilization within the battery device 10, the battery cells 20 within the battery device 10 are typically arranged in a certain pattern. For example, as... Figure 3 As shown, the battery device 10 may include a plurality of battery cells 20 arranged along the second direction X; further, if the number of battery cells 20 in the battery device 10 is large, the battery device 10 may also include a plurality of battery cell assemblies 70 arranged along the third direction Y.

[0099] It should be understood that, in the first direction Z, the end of the first limiting member 81 facing the base plate 60 can be connected to the frame 50 or the base plate 60.

[0100] In one possible configuration, the end of the first limiting member 81 facing the base plate 60 is connected to the frame 50, that is, the end of the first limiting member 81 facing the base plate 60 abuts against the frame 50. In this case, the battery cell assembly 70 can be attached to the frame 50 or set on the base plate 60.

[0101] In one possible configuration, the end of the first limiting member 81 facing the base plate 60 can also be connected to the base plate 60, that is, the first limiting member 81 abuts against the base plate 60, at which time the battery cell assembly 70 can overlap the base plate 60.

[0102] It should also be understood that the top of the portion of the frame 50 adjacent to the first limiting member 81 along the first direction Z is lower than the top of the first limiting member 81 along the first direction. That is, in the first direction Z, the height of the frame 50 is lower than the height of the first limiting member 81. The top of the portion of the frame 50 adjacent to the first limiting member 81 along the first direction Z is the end of the frame 50 in the first direction Z and facing the cover 11.

[0103] Additionally, the height of frame 50 refers to the distance from the starting point to the highest point of frame 50 in the first direction Z. For the starting point of frame 50 in the first direction Z, such as... Figure 3 As shown, the starting point of frame 50 in the first direction can be aligned horizontally with the starting point of the first limiting member 81. (See reference...) Figure 4 The height H4 of the frame 50 and the height H3 of the first limiting member 81.

[0104] It should also be understood that the walls in contact with adjacent battery cells 20 can be connected by adhesive or other means to reduce the possibility of movement between battery cells 20, improve the stability between battery cells 20, and increase the energy density of battery cells 20.

[0105] Figure 5 A schematic diagram of the structure of a battery device 10 provided in another embodiment of this application is shown.

[0106] In one possible way, such as Figures 2 to 5 As shown, the battery device 10 includes a plurality of battery cell assemblies 70 arranged along the third direction Y. The first limiting member 81 is located between the frame 50 and the battery cell assembly 70 adjacent to the frame 50, and is connected to the frame 50 and the battery cell assembly 70 respectively. That is, the first limiting member 81 is located between the frame 50 and the battery cell assembly 70 along the third direction Y.

[0107] Where there are two first limiting members 81, the two first limiting members 81 are respectively located at both ends of the plurality of battery cell assemblies 70 along the third direction Y. Where there is only one first limiting member 81, the first limiting member 81 can be located at any end of the battery cell assembly 70 along the third direction Y. It should be understood that the walls of the plurality of battery cells 20 in contact can be connected by adhesive, which can be more stable and improve the stability and reliability of the battery device 10.

[0108] In one possible way, such as Figure 5As shown, the battery device 10 includes a battery cell assembly 70, which may include a plurality of battery cells 20 arranged along a second direction X. A first limiting member 81 is located between a frame 50 and the battery cell assembly 70 adjacent to the frame 50, and is connected to both the frame 50 and the battery cell assembly 70, respectively. That is, the first limiting member 81 is located between the frame 50 and the battery cell assembly 70 along a third direction Y. Where there are two first limiting members 81, the two first limiting members 81 are located at opposite ends of the battery cell assembly 70. Where there is only one first limiting member 81, the first limiting member 81 can be located at any end of the battery cell assembly 70 along the third direction Y. It should be understood that the number of first limiting members 81 can also be two or more, and this application does not impose any limitation on this.

[0109] It should also be understood that the battery cell 20 in the embodiments of this application can be inverted, that is, the battery cell 20 is provided with electrode terminals facing the wall of the base plate 60 in the first direction; the battery cell 20 can also be upright, that is, the battery cell 20 is provided with electrode terminals on the wall away from the base plate 60 in the first direction.

[0110] In this embodiment, a first limiting member 81 is provided between the frame 50 and the battery cell assembly 70. The height of the first limiting member 81 in the first direction Z is higher than the height of the frame 50. Compared to setting the height of the frame 50 higher in the first direction Z for limiting, the solution in this embodiment uses the first limiting member 81 to limit the battery cell assembly 70, thereby reducing the height of the frame 50 and achieving weight reduction in the battery device 10, thus achieving lightweighting. Furthermore, the first limiting member 81 can limit the movement of the battery cell assembly 70, reducing wear and extending its service life. Furthermore, the connection between the first limiting member 81 and the frame 50 and the battery cell assembly 70 increases the stability and structural strength of the first limiting member 81, resisting external impacts, vibrations, or compression. Furthermore, when the battery device 10 experiences lateral compression, the first limiting member 81 can act as a buffer, reducing the compression on the battery cell assembly 70.

[0111] According to some embodiments of this application, optionally, such as Figure 4 As shown, in the first direction Z, the ratio of the height H4 of the portion of the frame 50 adjacent to the first limiting member 81 to the height H3 of the first limiting member 81 is H1, that is, H1=H4 / H3, and the range of this ratio H1 is: 0.2≤H1≤0.8.

[0112] It should be understood that, in the first direction Z, the ratio H1 of the height of the portion of the frame 50 adjacent to the first limiting member 81 to the height of the first limiting member 81 can also be set to: 0.4≤H1≤0.6.

[0113] For example, in the first direction Z, the ratio H1 of the height H4 of the portion of the frame 50 adjacent to the first limiting member 81 to the height H3 of the first limiting member 81 can be set to: 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc., or its value is within the range obtained by any combination of the above two values.

[0114] In the first direction Z, the ratio H1 of the height H4 of the first limiting member 81 to the height H3 of the battery cell assembly 70 can be obtained by testing the height of the first limiting member 81 and the height of the frame 50 multiple times.

[0115] In this embodiment, the ratio H1 of the height H4 of the portion of the frame 50 adjacent to the first limiting member 81 to the height H3 of the first limiting member 81 is set within this range. This can increase the stability and structural strength of the first limiting member 81, thereby limiting the battery cell assembly 70. At the same time, the height of the frame 50 can be reduced to reduce the weight of the battery device 10, thus achieving the lightweighting of the battery device 10.

[0116] Optionally, continue to refer to Figure 4 In the first direction Z, the ratio of the height H3 of the first limiting member 81 to the height H5 of the battery cell assembly 70 is H2, that is, H2=H3 / H5, and the range of this ratio H2 is: 0.5≤H2≤1.

[0117] For example, the ratio H2 of the height of the first limiting member 81 to the height of the battery cell assembly 70 can be set to: 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc., or its value is within the range obtained by any combination of the above two values. It should be understood that the height of the first limiting member 81 refers to the height of the first limiting member 81 in the first direction Z. The ratio H2 of the height of the first limiting member 81 to the height of the battery cell assembly 70 can be obtained by testing multiple times by selecting the height of the first limiting member 81 and the height of the battery cell assembly 70.

[0118] In this embodiment, the ratio H2 of the height of the first limiting member 81 to the height of the battery cell assembly 70 is set within this range, which allows the first limiting member 81 to limit the battery cell assembly 70, reducing the movement of the battery cell assembly 70, while also saving materials, reducing costs, achieving overall lightweighting of the battery device 10, and improving the energy density of the battery device 10.

[0119] Optionally, based on some embodiments of this application, reference may continue to be made to... Figure 4 The bottom end of the first limiting member 81 along the first direction Z is higher than the bottom end of the battery cell assembly 70 adjacent to the first limiting member 81 along the first direction.

[0120] In this embodiment, the bottom end of the first limiting member 81 along the first direction Z is higher than the bottom end of the battery cell assembly 70 adjacent to the first limiting member 81 along the first direction Z, which can reserve an assembly tolerance gap to facilitate assembly. In addition, the gap can be used as a filling space to connect the battery cell 20, the first limiting member 81 and the frame together, increasing the overall stability and structural strength of the battery device 10.

[0121] Figure 6 A schematic diagram of the structure of a battery device 10 provided in another embodiment of this application is shown. Figure 7 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown. Figure 8 A schematic diagram of the structure of a limiting component 80 provided in another embodiment of this application is shown.

[0122] According to some embodiments of this application, optionally, such as Figure 6 and Figure 7 As shown, the limiting component 80 also includes a second limiting member 82, which extends along the second direction X and is connected to the frame 50. The battery cell assembly 70 is mounted on the second limiting member 82.

[0123] It should be understood that the second limiting member 82 is a long strip extending along the second direction X, and its two ends along the second direction X are connected to the frame 50. The side wall of the second limiting member 82 along the third direction Y can be connected to the frame 50, or the side wall can be unconnected to any component, and the limiting is achieved by connecting the two ends along the second direction X to the frame 50.

[0124] It should also be understood that the bottom end of the second limiting member 82 facing the base plate 60 can be connected to the frame 50 or the base plate 60.

[0125] In one possible implementation, the second limiting member 82 is connected to the frame 50 at the bottom end facing the base plate 60. In this case, the second limiting member 82 can be connected to the first limiting member 81 along the side wall in the third direction Y. Figure 8 As shown, it can also be disconnected from both the first limiting member 81 and the frame 50.

[0126] In one possible implementation, the second limiting member 82 is connected to the bottom end of the base plate 60, and the battery cell assembly 70 is mounted on the second limiting member 82.

[0127] It should also be understood that, such as Figure 7As shown, the number of second limiting members 82 can be one, connected to the first limiting member 81, and disposed on the sidewalls of the battery cell assembly 70 at both ends along the third direction Y. The number of second limiting members 82 can also be two, and they can also be connected to the first limiting members 81 at both ends of the battery cell assembly 70. The number of second limiting members 82 can also be multiple, and they can be disposed at any position on the wall of the battery cell assembly 70 facing the base plate 60; this application does not limit this.

[0128] It should also be understood that the battery cell 20 is mounted on the second limiting member 82, that is, the battery cell 20 is mounted on the second limiting member 82 and connected to the second limiting member 82. The second limiting member 82 carries the battery cell 20. The two can be connected by adhesive or heat fusion. This application does not limit the connection between the two.

[0129] In this embodiment, the second limiting member 82 can be connected to the frame 50 to limit the movement of the battery cell assembly 70, thereby improving the limiting function and reducing the movement of the battery cell assembly 70. Furthermore, the connection between the second limiting member 82 and the frame 50 increases the overall stability and structural strength of the limiting assembly 80, resisting external impacts, vibrations, or compression. Furthermore, the battery cell assembly 70 is mounted on the second limiting member 82, which can also bear the weight of the battery cell assembly 70. Additionally, when the battery device 10 is subjected to external impacts or other problems, the second limiting member 82 can act as a buffer, protecting the battery cell assembly 70 and thus improving the safety performance of the battery device 10.

[0130] Figure 9 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown. Figure 10 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown. Figure 11 A cross-sectional schematic diagram of a battery device 10 according to another embodiment of this application is shown. Exemplarily, Figure 11 for Figure 10 Cross-sectional view.

[0131] According to some embodiments of this application, optionally, such as Figures 9 to 11 As shown, the battery device 10 includes a plurality of battery cell assemblies 70 arranged along the third direction Y, and the limiting assembly 80 also includes a plurality of second limiting members 82, which are spaced apart along the third direction; wherein, two adjacent battery cell assemblies 70 are mounted on the same second limiting member 82.

[0132] It should be understood that the two ends of the second limiting member 82 along the second direction X can be connected to the frame 50, and the bottom wall facing the base plate 60 can be suspended or connected to the base plate 60. This application does not limit this.

[0133] Optionally, when the battery device 10 includes a plurality of battery cell assemblies 70 arranged along a third direction Y, some adjacent battery cell assemblies 70 may be connected to the same second limiting member 82, while some adjacent battery cell assemblies 70 may not have second limiting members 82 provided between them, which can save materials and make the overall device lighter. In addition, multiple second limiting members 82 may also be provided on the bottom wall of a battery cell assembly 70 facing the base plate 60 to improve the limiting function and further reduce the movement of the battery cell assembly 70.

[0134] Optionally, if the battery device 10 includes two battery cell assemblies 70 arranged along a third direction Y, the limiting assembly 80 may include a second limiting member 82 to which the two battery cell assemblies 70 may be connected.

[0135] In this embodiment, when the battery device 10 includes multiple battery cell assemblies 70, connecting two adjacent battery cell assemblies 70 to the same second limiting member 82 can further improve the limiting function and enhance the structural stability of the battery cell assembly 70. Additionally, the second limiting member 82 can also support the battery cell assembly 70.

[0136] According to some embodiments of this application, optionally, in the second direction X and / or the third direction Y, the adjacent walls of two adjacent battery cells 20 are bonded together.

[0137] It should be understood that when the battery device 10 includes a single battery cell assembly 70, the battery cell assembly 70 may include multiple battery cells 20 arranged along a second direction X. Besides restricting the movement of the battery cells 20 by limiting the movement of the battery cells 20, the overall stability of the battery cell assembly 70 can also be improved by bonding adjacent battery cells 20 together. When the battery device 10 includes multiple battery cell assemblies 70 arranged along a third direction Y, the overall stability of the battery cell assembly 70 can be improved by providing some limiting components 80 and by bonding adjacent battery cells 20 together. Furthermore, the overall energy density of the battery device 10 can also be increased.

[0138] In this embodiment, the adjacent walls of two adjacent battery cells 20 are bonded together, which enhances the structural stability and mechanical fixation of the battery cells 20 while achieving overall weight reduction of the battery cell assembly 70, thus achieving overall weight reduction of the battery device 10. Furthermore, this design can also improve the overall energy density of the battery device 10.

[0139] Figure 12 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown. Figure 13A cross-sectional schematic diagram of a battery device 10 according to another embodiment of this application is shown. Exemplarily, Figure 13 for Figure 12 Cross-sectional view. Figure 14 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown.

[0140] According to some embodiments of this application, optionally, such as Figure 12 and Figure 13 As shown, the limiting component 80 also includes a third limiting member 83, which extends along the second direction X. The third limiting member 83 is located between the side walls of two adjacent battery cell assemblies 70 and is connected to the battery cell assembly 70 and the frame 50.

[0141] It should be understood that the third limiting member 83 may have an elongated structure extending along the second direction X. The third limiting member 83 may be directly connected to the frame 50, and / or indirectly connected to the frame 50 through the second limiting member 82. Specifically, the connection relationship between the third limiting member 83 and other components, such as the battery cell assembly 70, the frame 50, and the base plate 60, may include the following:

[0142] In one scenario, the two ends of the third limiting member 83 along the second direction X can be connected to the frame 50, either mounted on the frame 50 or abutting against the inner wall of the frame 50. This application does not limit this.

[0143] In another scenario, the bottom wall of the third limiting member 83 facing the base plate 60 can be connected to the second limiting member 82. For example, if the second limiting member 82 is mounted on the frame 50, the bottom wall of the third limiting member 83 facing the base plate 60 is connected to the second limiting member 82, and the second limiting member 82 is connected to the frame 50; that is, the third limiting member 83 is indirectly connected to the frame 50. Alternatively, the bottom wall of the third limiting member 83 facing the base plate 60 can also be connected to the frame 50, or it can be partially connected to the frame 50 and partially connected to the second limiting member 82. Finally, the bottom wall of the third limiting member 83 facing the base plate 60 can also be connected to the base plate 60 itself.

[0144] In another scenario, the two sidewalls of the third limiting member 83 along the third direction Y can be connected to the battery cell assembly 70, or they can be partially connected to the battery cell assembly 70 and partially suspended. For example, when the third limiting member 83 is connected to the bottom wall of the base plate 60, the third limiting member 83 is partially connected to the battery cell assembly 70 along the sidewalls of the third direction Y and partially suspended between the base plate 60 and the frame 50.

[0145] It should also be understood that the number of third limiting components 83 can be set according to actual circumstances. For example, such as Figure 12 and Figure 13As shown, in order to further improve the limiting function of the battery cell assembly 70, the third limiting member 83 can be located between the side walls of each of two adjacent battery cell assemblies 70.

[0146] Optionally, such as Figure 14 As shown, in order to save space, increase the overall energy density of the battery device 10, and reduce weight, a third limiting member 83 can be set between some adjacent battery cell components 70, and other battery cell components 70 can be connected by adhesive bonding to improve the limiting function and increase the energy density of the battery device 10, thereby making the battery device 10 lighter overall.

[0147] In this embodiment, the third limiting member 83 is located between the sidewalls of two adjacent battery cell assemblies 70 and is connected to both the battery cell assembly 70 and the frame 50. It can limit the movement of each battery cell assembly 70, further enhancing the limiting function and reducing movement of the battery cell assembly 70, thereby improving the stability and safety of the battery device 10. Furthermore, the third limiting member 83 can work together with the second limiting member 82 to limit the movement of the battery cell assembly 70 in all directions, further improving the limiting function.

[0148] Optional, such as Figure 13 As shown, the battery cell 20 has an electrode terminal 214 on the wall facing the base plate 60. In the third direction Y, the size of the second limiting member 82 is smaller than the distance between the adjacent electrode terminals 214 of two adjacent battery cells 20.

[0149] It should be understood that when an electrode terminal 214 is provided on the wall of the battery cell 20 facing the base plate 60, the second limiting member 82 should be spaced apart from the electrode terminal 214 of the battery cell 20. If the second limiting member 82 and the electrode terminal 214 are connected, the pressure generated by the second limiting member 82 may damage the structure of the electrode terminal 214 and affect the normal operation of the battery device 10.

[0150] It should also be understood that the distance between adjacent electrode terminals 214 of adjacent battery cells 20 is the minimum distance between any electrode terminal 214 of one battery cell 20 and any electrode terminal 214 of the other battery cell 20. For example, for two battery cells 20 and battery cell 20 adjacent along a third direction Y, the distance between adjacent electrode terminals 214 of adjacent battery cells 20 is the minimum distance between electrode terminals 214 of battery cell 20 and battery cell 20.

[0151] In this embodiment, the size of the second limiting member 82 is smaller than the distance between adjacent electrode terminals 214 of adjacent battery cells 20. This allows the second limiting member 82 to restrict the movement of the battery cell assembly 70 while remaining spaced apart from the electrode terminals 214, preventing them from interfering with each other. Furthermore, this design fully utilizes the space between the electrode terminals 214, thereby increasing the energy density of the battery cell assembly 70.

[0152] Figure 15 A partial structural schematic diagram of a battery device 10 provided in another embodiment of this application is shown.

[0153] According to some embodiments of this application, optionally, such as Figure 15 As shown, the limiting component 80 also includes a fourth limiting member 84, which extends along the second direction X. The fourth limiting member 84 is located between the battery cell assembly 70 and the cover 11 and abuts against the wall of the battery cell 20 facing the cover 11.

[0154] It should be understood that the fourth limiting member 84 may be a strip extending along the second direction X, the fourth limiting member 84 being located between the battery cell assembly 70 and the cover 11 and abutting against the wall of the battery cell 20 facing the cover 11, or described as the fourth limiting member 84 abutting against the side of the battery cell assembly 70 away from the base plate 60.

[0155] In one scenario, the fourth limiting member 84 is connected to the frame 50 at both ends along the second direction X, and is also connected to the frame 50 or the first limiting member 81 along the side wall of the third direction Y.

[0156] In another scenario, where the battery device 10 includes a plurality of battery cell assemblies 70 arranged along a third direction Y, two adjacent battery cell assemblies 70 abut against the same fourth limiting member 84.

[0157] Optionally, when the battery device 10 includes multiple battery cell assemblies 70 arranged along a third direction Y, some adjacent battery cell assemblies 70 can be connected to the same fourth limiting member 84, while some adjacent battery cell assemblies 70 may not have the fourth limiting member 84 provided between them, which can save materials and make the overall device lighter. In addition, multiple fourth limiting members 84 can also be provided on the top wall of a battery cell assembly 70 facing the base plate 60 to improve the limiting function and further reduce the movement of the battery cell assembly 70.

[0158] In this embodiment, the fourth limiting member 84 abuts against the side of the battery cell assembly 70 away from the base plate 60, which can reduce the movement of the battery cell assembly 70 in the first direction Z and limit the movement of the battery cell assembly 70. Furthermore, the fourth limiting member 84 and the second limiting member 82 can jointly limit the movement of the battery cell assembly 70 in the first direction Z, thereby improving the limiting function. Furthermore, the fourth limiting member 84, the second limiting member 82, and the third limiting member 83 can further limit the movement of the battery cell assembly 70 in the first direction Z and the third direction Y, and increase the overall stability and structural strength of the limiting component 80, resisting external impacts, vibrations, or compression.

[0159] Optionally, based on some embodiments of this application, reference may continue to be made to... Figure 15 The limiting component 80 includes a first limiting member 81 and a second limiting member 82 that have overlapping portions projected in the first direction Z and are interconnected; and / or, the limiting component 80 includes a first limiting member 81 and a fourth limiting member 84 that have overlapping portions projected in the first direction Z and are interconnected and are interconnected; and / or, the limiting component 80 includes a third limiting member 83 and a second limiting member 82 that have overlapping portions projected in the first direction Z and are interconnected and are interconnected and are interconnected; and / or, the limiting component 80 includes a third limiting member 83 and a fourth limiting member 84 that have overlapping portions projected in the first direction Z and are interconnected and are interconnected and are interconnected.

[0160] It should be understood that the first limiting member 81 and the second limiting member 82, which have overlapping portions in the projection, are connected to each other. The first limiting member 81 is connected to the frame 50 with the bottom wall facing the base plate 60, and the second limiting member 82 is connected to the frame 50 with the bottom facing the base plate 60 and is erected on the frame 50. Therefore, the side wall of the first limiting member 81 facing the receiving cavity can be connected to the side wall of the second limiting member 82 away from the receiving cavity to improve the overall limiting function.

[0161] It should also be understood that, similar to the connection of the first limiting member 81 and the second limiting member 82, the first limiting member 81 and the fourth limiting member 84, which have overlapping projections, are connected to each other. The side wall of the first limiting member 81 facing the receiving cavity can be connected to the side wall of the fourth limiting member 84 away from the receiving cavity to improve the overall limiting function.

[0162] It should also be understood that the third limiting member 83 and the second limiting member 82 with overlapping projections are interconnected. The third limiting member 83 can be mounted on the second limiting member 82 and connected with the second limiting member 82 to jointly restrict the movement of the battery cell assembly 70.

[0163] It should also be understood that the third limiting member 83 and the fourth limiting member 84, which have overlapping portions in the projection, are interconnected. The top wall of the third limiting member 83 along the first direction Z can be connected to the fourth limiting member 84 to jointly restrict the movement of the battery cell assembly 70.

[0164] Optionally, the first limiting member 81 and the second limiting member 82 can be integrally formed; and / or, the first limiting member 81 and the fourth limiting member 84 can be integrally formed; and / or, the third limiting member 83 and the second limiting member 82 can be integrally formed; and / or, the third limiting member 83 and the fourth limiting member 84 can be integrally formed. The integrally formed limiting assembly 80 can better limit the battery cell assembly 70, improve limiting performance, and further stabilize the battery cell assembly 70. In addition, the integrally formed limiting assembly 80 reduces the weakness caused by connectors or welding points. The integrally formed structure can evenly distribute stress, improving the impact resistance during side extrusion. Furthermore, the integrally formed structure can improve rigidity, preventing deformation caused by vibration or external impact, thereby protecting the battery cell assembly 70.

[0165] In this embodiment, in the first direction Z, the first limiting member 81 and the second limiting member 82, whose projections overlap, are interconnected and can jointly restrict the movement of the battery cell assembly 70 in the first direction Z and the third direction Y, increasing the overall stability and structural strength of the limiting assembly 80 and resisting external impacts, vibrations, or compression. Furthermore, the first limiting member 81 and the fourth limiting member 84, whose projections overlap, are interconnected and can also jointly restrict the movement of the battery cell assembly 70 in the first direction Z and the third direction Y, increasing the overall stability and structural strength of the limiting assembly 80 and resisting external impacts, vibrations, or compression. Furthermore, the third limiting member 83 and the second limiting member 82, whose projections overlap, are interconnected and can also jointly restrict the movement of the battery cell assembly 70 in the first direction Z and the third direction Y, increasing the overall stability and structural strength of the limiting assembly 80 and resisting external impacts, vibrations, or compression. Furthermore, the third limiting member 83 and the fourth limiting member 84, which have overlapping projections, are interconnected and can also jointly restrict the movement of the battery cell assembly 70 in the first direction Z and the third direction Y, thereby increasing the overall stability and structural strength of the limiting assembly 80 and resisting external impacts, vibrations or compression.

[0166] In some embodiments, the cover 11 and the frame 50 are connected by adhesive bonding or thermal fusion; and / or, the base plate 60 and the frame 50 are connected by adhesive bonding or thermal fusion.

[0167] The cover 11 and the frame 50 are connected by adhesive or heat fusion. When the cover 11 cracks or is damaged due to impacts from stones or other issues during use and needs replacement, its connection to the frame 50 can be quickly broken by secondary heat fusion or other methods, and then reconnected by adhesive or heat fusion. Furthermore, both the cover 11 and the base plate 60 can be made of plastic, achieving a lightweight design for the battery device 10. It should be understood that the cover 11 and the base plate 60 can also be made of other materials; for example, the cover 11 and / or the base plate 60 can be metal parts formed through sheet metal processing, or composite materials, etc.

[0168] It should be understood that the connection between the base plate 60 and the frame 50 is also similar, through adhesive bonding or hot-melt bonding. When the base plate 60 needs to be replaced due to cracks or damage caused by stones or other issues during use, its connection with the frame 50 can be broken through secondary hot-melt bonding or other methods, and a new base plate 60 can be replaced and hot-melt / adhesively bonded to the frame 50. This facilitates disassembly without damaging the undamaged frame 50.

[0169] In this embodiment, both the cover 11 and the base plate 60 are made of plastic, which can achieve the weight reduction of the battery device 10. The cover 11 and the frame 50 are connected by adhesive or heat fusion, and / or the base plate 60 and the frame 50 are connected by adhesive or heat fusion. When the cover 11 or the base plate 60 cracks or is damaged due to stone impact or other problems during use and needs to be replaced, the connection between it and the frame 50 can be broken by secondary heat fusion or other means, and then reconnected by adhesive or heat fusion. This can improve the maintainability of the battery device 10 and thus improve the performance of the battery device 10. In addition, the adhesive or heat fusion connection between the cover 11 and the frame 50, and / or the base plate 60 and the frame 50 can quickly achieve the fusion connection between the two, which facilitates the sealing between the two.

[0170] According to some embodiments of this application, the frame 50 may optionally be configured as a hollow structure.

[0171] In this embodiment, the frame 50 is configured as a hollow structure, which can reduce the weight of the battery device 10 and achieve lightweighting of the battery device 10. Furthermore, the hollow structure of the frame 50 facilitates connection with the limiting component 80 or the base plate 60 through connectors.

[0172] Optionally, the limiting assembly 80 also has a mounting cavity inside, which is isolated from the flow channel. The limiting assembly 80 and the frame 50 are connected by a connector passing through the mounting cavity. That is, the limiting assembly 80 and the frame 50 are connected by rivets or self-tapping rivets. By setting the mounting cavity, the risk of the connector puncturing the flow channel and causing leakage of the heat exchange medium can be reduced.

[0173] According to some embodiments of this application, the frame 50 may optionally be configured as a plate-like structure.

[0174] In this embodiment, the base plate 60 is a plate-like structure, and the frame 50 is stacked on the base plate 60. Alternatively, the frame 50 and the base plate are integrally formed. The base plate 60 is bent towards the cover 11 on both sides along the third direction Y to form a stepped structure, which can serve as the frame 50.

[0175] According to some embodiments of this application, optionally, the limiting component 80 is connected to the frame 50 by adhesive bonding and / or by a connector; and / or, the limiting component 80 is connected to the battery cell assembly 70 by adhesive bonding or thermal fusion bonding.

[0176] In this embodiment, the limiting component 80 and the frame 50 are connected by a connector, which improves the connection strength between them, making the limiting component 80 more stable and providing a better limiting effect. Alternatively, the limiting component 80 and the frame 50 are connected by adhesive bonding; and / or the limiting component 80 and the battery cell assembly 70 are connected by adhesive bonding or thermal fusion bonding. This improves the connection strength and allows for quick replacement of the faulty component without damaging other components in the event of a failure in one part, improving the maintainability of the battery device 10 and thus enhancing its performance.

[0177] According to some embodiments of this application, optionally, the battery cell 20 has a first wall 21, which is the wall with the largest area in the battery cell 20, and the second direction X is a direction perpendicular to the first wall 21.

[0178] It should be understood that the first wall 21 is the wall with the largest area in the battery cell 20 and the second direction X is perpendicular to the first wall 21. That is, in one possible way, except for the wall perpendicular to the second direction X, the other walls of the battery cell 20 are of the same size. The limiting component 80 contacts the other walls of the battery cell 20 except for the first wall 21. Since the expansion force of the battery cell 20 is on the first wall 21, this design can reduce the expansion force from damaging the limiting component. In addition, when the limiting component 80 is a water-cooled plate, it can reduce the problem of the expansion force squeezing and damaging the flow channel of the water-cooled plate, which would cause the heat exchange medium to leak.

[0179] In this embodiment, the second direction X is perpendicular to the first wall 21, meaning that the limiting components 80 are all located on the other walls except the wall with the largest area of ​​the battery cell 20. The expansion force generated by the battery cell 20 is on the wall with the largest area, thus reducing the damage of the expansion force to the first limiting member 81 and the third limiting member 83 and improving the limiting function of the first limiting member 81 and the third limiting member 83 on the battery cell assembly 70.

[0180] According to some embodiments of this application, optionally, the limiting component 80 has a flow channel for a heat exchange medium to pass through, the heat exchange medium being used to regulate the temperature of the battery cell 20.

[0181] Optionally, the first limiting member 81, the second limiting member 82, the third limiting member 83, and the fourth limiting member 84 have flow channels for the heat exchange medium to pass through. There are connection points between the first limiting member 81, the second limiting member 82, the third limiting member 83, and the fourth limiting member 84, and the flow channels can be interconnected so that the heat exchange medium can flow more quickly and the temperature can be adjusted more quickly.

[0182] In this embodiment, the limiting component 80 not only restricts the movement of the battery cell assembly 70 and reduces the compression of the battery cell assembly 70, but also has an internal flow channel for the heat exchange medium to circulate, thereby regulating the temperature of the battery device 10. Furthermore, the limiting component 80 has a hollow structure with good tensile strength, which can more effectively disperse and unload the expansion force generated by the battery cell 20 in the second direction X. For example, when the wall of the battery cell 20 perpendicular to the second direction X is the wall with the largest area, the direction of the expansion force generated by the battery cell 20 is in the second direction X. Therefore, the limiting components 80 provided on other walls of the battery cell 20 can effectively disperse and unload this expansion force. Additionally, when the wall of the battery cell 20 perpendicular to the second direction X is the wall with the largest area, the compression of the limiting components 80 provided on other walls by the expansion force can also be reduced. Furthermore, integrating the temperature regulation function into the limiting component 80 saves space for a separate temperature regulation system, making the battery device 10 more compact and improving its energy density.

[0183] According to some embodiments of this application, optionally, the limiting component 80 and / or the battery cell assembly 70 are mounted on the frame 50.

[0184] It should be understood that the limiting component 80 is mounted on the frame 50, meaning that the limiting component 80 is connected to and mounted on the frame 50. The battery cell assembly 70 is mounted on the frame 50, meaning that the battery cell assembly 70 is connected to and mounted on the frame 50. Both the limiting component 80 and the battery cell assembly 70 are mounted on the frame 50. The battery cell assembly 70 can be mounted on the limiting component 80, for example, on the second limiting member 82. The second limiting member 82 not only restricts the movement of the battery cell assembly 70 but also supports the weight of the battery cell 20. Compared to using a single, non-perforated plate for support, the solution in this embodiment can achieve overall weight reduction.

[0185] In this embodiment, the limiting component 80 and / or the battery cell assembly 70 are mounted on the frame 50. The limiting component 80 can restrict the movement of the battery cell assembly 70, while the limiting component 80 and the frame 50 jointly bear the weight of the battery cell assembly 70, reducing the load on the base plate 60 on the battery cell assembly 70 and protecting the base plate 60. In addition, when the battery device 10 is subjected to external impacts or other problems, the limiting component 80 can play a buffering role to protect the battery cell assembly 70, thereby improving the performance of the battery device 10.

[0186] Optionally, according to some embodiments of this application, reference may be made to... Figure 15 The frame 50 includes a frame portion 51 and an extension portion 52 connected to each other. The extension portion 52 is located on the side of the frame portion 51 facing the receiving space. The cover 11 is connected to the frame portion 51, and the limiting component 80 and / or the battery cell assembly 70 are mounted on the extension portion 52.

[0187] In this embodiment, the limiting component 80 and / or the battery cell assembly 70 are mounted on the extension 52. During the compression process, the extension 52 and the limiting component 80 work together to resist external impacts and vibrations or compression, protect the battery cell assembly 70, and improve the limiting function of the battery cell assembly 70.

[0188] Figure 16 A cross-sectional schematic diagram of a battery device 10 provided in another embodiment of this application is shown.

[0189] According to some embodiments of this application, optionally, such as Figure 16 As shown, the base plate 60 is connected to the frame portion 51 and / or the extension portion 52, and the base plate 60 is located on the side of the extension portion 52 away from the limiting component 80.

[0190] It should be understood that the base plate 60 is located on the side of the extension 52 away from the limiting component 80. The base plate 60 can also be connected to the side of the entire frame 50 away from the limiting component 80. This design allows the limiting component 80 and the extension 52 to bear the weight of the battery cell assembly 70, reducing the load on the base plate 60 and thus reducing wear on the base plate 60, thereby improving the performance of the battery device 10. In addition, the limiting component 80 and the extension 52 bearing the weight of the battery cell assembly 70 can reduce the rigidity requirements of the base plate 60, making it easier to achieve lightweight design of the base plate 60, further reducing the overall weight of the battery device 10 and achieving lightweight design. Furthermore, since the base plate 60 is located on the side of the extension 52 away from the limiting component 80, the limiting component 80 can act as a buffer when the battery device 10 is subjected to external impacts or other problems, protecting the battery cell assembly 70 and thus improving the safety performance of the battery device 10.

[0191] Optionally, the limiting component 80 and / or the battery cell assembly 70 can also be mounted on the base plate 60, with the base plate 60 bearing the weight of the battery cell assembly 70. In addition, by mounting the battery cell assembly 70 on the base plate 60, the movement of the battery cell assembly 70 can be restricted by the limiting component and the frame 50, thereby further improving the limiting function.

[0192] Optionally, according to some embodiments of this application, reference may be made to... Figure 13 A pressure relief mechanism 215 is provided on the wall of the battery cell 20 facing the base plate 60. A gap space is formed between the pressure relief mechanism 215 and the base plate 60, and the pressure relief mechanism 215 is arranged opposite to the gap space.

[0193] It should be understood that the pressure relief mechanism 215 is arranged opposite to the partition space, that is, there is no obstruction between the pressure relief mechanism 215 and the partition space, allowing for rapid gas flow.

[0194] In one possible configuration, a pressure relief mechanism 215 is provided on the wall of the battery cell 20 facing the base plate 60. Two electrode terminals 214 may also be provided on the wall of the battery cell 20 facing the base plate 60. When the battery cell 20 is inverted, a gap is formed between the pressure relief mechanism 215 and the base plate 60. This allows for faster release of pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, thereby protecting the battery cell 20 and improving the safety performance of the battery device 10.

[0195] In one possible approach, such as with a blade battery, the battery cell 20 has a pressure relief mechanism 215 on the wall facing the base plate 60, and the two electrode terminals 214 can be located on other walls of the battery cell 20. In this case, a gap is formed between the pressure relief mechanism 215 and the base plate 60, which is beneficial for releasing pressure or temperature more quickly when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, thereby protecting the battery cell 20 and improving the safety performance of the battery device 10.

[0196] In this embodiment, a space is formed between the pressure relief mechanism 215 and the base plate 60, and the pressure relief mechanism 215 is arranged opposite to the space. When the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 215 is actuated to release the internal pressure or temperature. The pressure or temperature of the battery cell 20 can be efficiently released through the space, thereby protecting the battery cell 20 and improving the safety performance of the battery device 10.

[0197] According to some embodiments of this application, optionally, such as Figure 16As shown, the battery device 10 also includes a strap 110, which is arranged around the battery cell assembly 70 and is located on the side of the first limiting member 81 away from the base plate 60. The strap 110 and the limiting member 80 are spaced apart in the first direction Z.

[0198] It should be understood that the strap 110 is located on the side of the first limiting member 81 away from the base plate 60. The strap 110 and the first limiting member 81 are spaced apart in the first direction Z, and while not interfering with each other, they can still serve to fix the battery cell assembly 70. In addition, fixing the battery cell assembly 70 with the strap 110 can resist the expansion force generated by the battery cell 20.

[0199] The material of the strap 110 can be steel, which can improve the fastening ability. It should be understood that the strap 110 can also be other materials such as plastic, etc. This application does not limit it.

[0200] In this embodiment, the battery cell assembly 70 is fixedly surrounded by the strap 110, which can secure the battery cell assembly 70. This also reduces damage caused by vibration, impact, or accidental collision, and lowers the risk of leakage or thermal runaway. Furthermore, by tightly binding the battery cell assembly 70 together with the strap 110, space can be utilized more effectively, increasing the energy density of the battery cell assembly 70. Also, the strap 110 is located on the side of the first limiting member 81 away from the base plate 60, ensuring that the two are spaced apart and do not interfere with each other.

[0201] Figure 17 A schematic diagram of the structure of a base plate 60 provided in an embodiment of this application is shown.

[0202] According to some embodiments of this application, optionally, such as Figure 17 As shown, the base plate 60 is provided with multiple weak areas 61, and the multiple weak areas 61 are corresponding to the pressure relief mechanisms 215 of multiple battery cells 20. The weak areas 61 are configured to be damaged when the pressure and / or temperature inside the battery cell 20 reaches a predetermined threshold.

[0203] The weak zone 61 can be set on the surface of the base plate 60 near the battery cell assembly 70, which is more conducive to cooperating with the pressure relief mechanism 215 to release pressure or temperature.

[0204] It should be understood that the weak area 61 is a relatively thin area in the base plate 60. The weak area 61 can be integrally formed with the base plate 60 through processing methods such as injection molding, thereby reducing the complexity of installing the pressure relief mechanism 215 and further reducing the weight of the base plate, thus improving the lightweighting of the battery device 10.

[0205] Optionally, on a plane oriented towards the direction of gravity of the battery device 10, the orthographic projection of the weak area 61 falls within the orthographic projection of the pressure relief mechanism 215. This allows for a faster release of pressure and / or temperature inside the battery device 10.

[0206] It should be understood that in order to protect the base plate 60 and reduce the wear and tear on the base plate 60, a small number of weak areas 61 can be set on the base plate 60. In addition, the weak areas 61 may or may not correspond to the pressure relief mechanism 215. This application does not impose any restrictions on this.

[0207] In this embodiment, a weak area 61 is provided on the base plate 60, which corresponds to the pressure relief mechanism 215 of the battery cell 20. This allows for faster release of pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, thereby protecting the battery cell 20 and improving the safety performance of the battery device 10.

[0208] According to some embodiments of this application, optionally, the battery cell assembly 70 is connected to the cover 11.

[0209] It should be understood that the battery cell assembly 70 is connected to the cover 11, that is, the top wall of the battery cell 20 along the first direction Z is connected to the cover 11. It should also be understood that the connection between the battery cell 20 and the cover 11 can be heat-fused, adhesive, or other connection methods, and this application does not limit this.

[0210] In this embodiment, the connection between the battery cell assembly 70 and the cover 11 reduces the movement of the battery cell assembly 70 in the first direction Z, thereby improving the stability of the battery cell assembly 70. Furthermore, by connecting the battery cell assembly 70 to the cover 11, the cover 11 bears a portion of the weight of the battery cell assembly 70, preventing the weight of the battery cell assembly 70 from being entirely concentrated on the frame 50 and / or the limiting component 80, thus reducing the support burden on the frame 50 and / or the limiting component 80.

[0211] This application embodiment also provides an electrical device, including the battery device 10 in any of the above embodiments, the battery device 10 being used to provide electrical energy to the electrical device. Specifically, the electrical device can be the above... Figure 1 The vehicle 1 shown can also be any electrical device that uses the battery device 10.

[0212] In this embodiment, the battery device 10 is made lighter overall and its compression resistance is improved by setting a frame 50 that is lower than the limiting component 80, thereby improving the battery device's battery life.

[0213] In some implementations, the electrical equipment can be a vehicle, a ship, or a spacecraft.

[0214] According to some embodiments of this application, see Figures 2 to 17 This application provides a battery device 10, including a frame 50, a cover 11, a base plate 60, a battery cell assembly 70, and a limiting component. The frame 50 has a first opening and a second opening, which are located on opposite sides of a first direction Z and are interconnected. The cover 11 is connected to the frame 50 and closes the first opening. The base plate 60 is connected to the frame 50 and closes the second opening. The base plate 60, frame 50, and cover 11 together form a receiving space. The battery cell assembly 70 is received within the receiving space and includes a plurality of battery cells 20 arranged along a second direction X. A limiting component 80 is accommodated in the accommodating space. The limiting component 80 includes a first limiting member 81, which extends along a second direction. In the third direction Y, the first limiting member 81 is located between the frame 50 and the battery cell assembly 70 adjacent to the frame 50, and is connected to both the frame 50 and the battery cell assembly 70. The top of the portion of the frame 50 adjacent to the first limiting member 81 along the first direction Z is lower than the top of the first limiting member 81 along the first direction Z. The first direction Z, the second direction X, and the third direction Y are all perpendicular to each other, and the height directions of the frame 50 and the first limiting member 81 are the same as the first direction. Compared to setting a higher height for limiting the frame 50 in the first direction Z, the solution in this embodiment uses the first limiting member 81 to limit the height of the frame 50, thereby reducing the weight of the battery device 10. Furthermore, the first limiting member 81 can limit the battery cell assembly 70, reducing its movement. Furthermore, the first limiting member 81 is connected to the frame 50 and the battery cell assembly 70, which can increase the stability and structural strength of the first limiting member 81 and resist external impacts, vibrations or compression. Furthermore, when the battery device 10 is subjected to lateral compression, the first limiting member 81 can act as a buffer to reduce the compression on the battery cell assembly 70.

[0215] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: The frame (50) has a first opening and a second opening, the first opening and the second opening being located on both sides of a first direction and communicating with each other. A cover (11) is connected to the frame (50) and closes the first opening; The base plate (60) is connected to the frame (50) and closes the second opening. The base plate (60), the frame (50) and the cover (11) together form an accommodating space. A battery cell assembly (70) is housed in the housing space, the battery cell assembly (70) comprising a plurality of battery cells (20) arranged along a second direction. A limiting component (80) is accommodated in the accommodating space. The limiting component (80) includes a first limiting member (81) extending along a second direction. In a third direction, the first limiting member (81) is located between the frame (50) and the battery cell assembly (70) adjacent to the frame (50), and is connected to the frame (50) and the battery cell assembly (70) respectively. The top end of the portion of the frame (50) adjacent to the first limiting member (81) along the first direction is lower than the top end of the first limiting member (81) along the first direction. Wherein, the first direction, the second direction and the third direction are perpendicular to each other, and the height direction of the frame (50) and the first limiting member (81) is the same as the first direction.

2. The battery device of claim 1, wherein In the first direction, the ratio H1 of the height of the portion of the frame (50) adjacent to the first limiting member (81) to the height of the first limiting member (81) is in the range of 0.2≤H1≤0.

8.

3. The battery device of claim 1, wherein The bottom end of the first limiting member (81) along the first direction is higher than the bottom end of the battery cell assembly (70) adjacent to the first limiting member (81) along the first direction.

4. The battery device of claim 3, wherein The limiting component (80) and / or the battery cell assembly (70) are mounted on the frame (50).

5. The battery device of claim 4, wherein The frame (50) includes a frame portion (51) and an extension portion (52) connected to each other. The extension portion (52) is located on the side of the frame portion (51) facing the receiving space. The cover (11) is connected to the frame portion (51), and the limiting component (80) and / or the battery cell assembly (70) are mounted on the extension portion (52).

6. The battery device of claim 5, wherein The base plate (60) is connected to the frame portion (51) and / or the extension portion (52), and the base plate (60) is located on the side of the extension portion (52) away from the limiting component (80).

7. The battery device of claim 1, wherein The limiting component (80) further includes a second limiting member (82), which extends along the second direction and is connected to the frame (50), and the battery cell assembly (70) is mounted on the second limiting member (82).

8. The battery device of claim 7, wherein, The battery device includes a plurality of battery cell assemblies (70) arranged along the third direction, and the limiting assembly (80) further includes a plurality of second limiting members (82), which are spaced apart along the third direction. Two adjacent battery cell assemblies (70) are mounted on the same second limiting member (82).

9. The battery device of claim 8, wherein, In the second direction and / or the third direction, the adjacent walls of two adjacent battery cells (20) are bonded together.

10. The battery device of claim 8, wherein, The limiting component (80) further includes a third limiting member (83) which extends along the second direction and is located between two adjacent battery cell assemblies (70) and connected to the battery cell assembly (70) and the frame (50).

11. The battery device of claim 10, wherein, The limiting component (80) further includes a fourth limiting member (84) extending along the second direction, the fourth limiting member (84) being located between the battery cell assembly (70) and the cover (11), and abutting against the wall of the battery cell (20) facing the cover (11).

12. The battery device of claim 11, wherein, The limiting component (80) includes a first limiting member (81) and a second limiting member (82) that have overlapping portions projected in the first direction and are interconnected; and / or, The limiting assembly (80) includes a first limiting member (81) and a fourth limiting member (84) that are interconnected and have overlapping portions projected in the first direction; and / or, The limiting component (80) includes the third limiting member (83) and the second limiting member (82) that have overlapping portions projected in the first direction and are interconnected; and / or, The limiting component (80) includes the third limiting member (83) and the fourth limiting member (84) which have overlapping portions projected in the first direction and are interconnected.

13. The battery device according to any one of claims 1 to 12, characterized by, The cover (11) and the frame (50) are connected by adhesive bonding or thermal fusion; and / or, The base plate (60) and the frame (50) are connected by adhesive bonding or hot-melt bonding.

14. The battery device according to any one of claims 1 to 12, characterized by, The limiting component (80) is connected to the frame (50) by adhesive bonding and / or by connectors; and / or, The limiting component (80) and the battery cell assembly (70) are connected by adhesive bonding or hot-melt bonding.

15. The battery device according to any one of claims 1 to 12, characterized by, The battery cell (20) has a first wall (21), which is the wall with the largest area in the battery cell (20), and the second direction is the direction perpendicular to the first wall (21).

16. The battery device of any one of claims 1 to 12, wherein, The limiting component (80) has a flow channel for the heat exchange medium to pass through, which is used to regulate the temperature of the battery cell (20).

17. The battery device of any one of claims 1 to 12, wherein, The battery cell (20) is provided with a pressure relief mechanism (215) on the wall facing the base plate (60), and a gap space is formed between the pressure relief mechanism (215) and the base plate (60), and the pressure relief mechanism (215) is arranged opposite to the gap space.

18. The battery device of claim 17, wherein, The base plate (60) is provided with a plurality of weak areas (61), and the plurality of weak areas (61) are provided in correspondence with the pressure relief mechanisms (215) of the plurality of battery cells (20). The weak areas (61) are configured to be destroyed when the pressure and / or temperature inside the battery cell (20) reaches a predetermined threshold.

19. The battery device of any one of claims 1 to 12, wherein, The battery device further includes a strap (110) which is disposed around the battery cell assembly (70) and is located on the side of the first limiting member (81) away from the base plate (60), and the strap (110) and the limiting member (80) are spaced apart in the first direction.

20. The battery device of any one of claims 1-12, wherein, The battery cell assembly (70) is connected to the cover (11).

21. An electrical device, comprising: The battery device includes any one of claims 1 to 20, wherein the battery device provides electrical energy to the electrical device.

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