Battery device, power utilization device and energy storage device

Abstract

The utility model provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body, single batteries, a high-voltage box and a control box, the box body is provided with a mounting cavity, the single batteries, the high-voltage box and the control box are all located in the mounting cavity, the single batteries and the high-voltage box are arranged at intervals, the control box is electrically connected with the single batteries, the high-voltage box comprises a first box body and a cover plate, the control box comprises a second box body and a bottom plate, and the bottom plate is connected with the cover plate. The bottom plate is connected with the cover plate to realize the connection of the control box and the high-voltage box, an additional bracket structure is not needed, and after a special fixing bracket is omitted, the space, occupied by the bracket, of the box body mounting cavity can be reduced, and the bracket is prevented from extruding other parts. And the space originally occupied by the bracket can be used for increasing the arrangement number of the battery monomers, or reserving more reasonable intervals for the battery monomers, so that the energy density of the battery device is favorably improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a crucial factor in its development.

[0003] The battery pack consists of a housing and individual battery cells located within it. The housing also houses a control box for monitoring the battery pack's operational status. This control box contains built-in electrical components and can collect and monitor key parameters such as voltage and temperature of the individual battery cells. Due to limited space within the housing, and the control box's relatively large footprint, the arrangement of other components within the battery pack is affected. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device, power consumption device, and energy storage device to reduce the impact of the control box on other components.

[0005] An embodiment of the first aspect of this application provides a battery device, the battery device comprising: a housing having a mounting cavity; a battery cell located in the mounting cavity; a high-voltage box located in the mounting cavity, the battery cells and the high-voltage box being arranged at intervals, the high-voltage box including a first housing and a cover plate, the cover plate covering the opening side of the first housing; and a control box located in the mounting cavity, the control box being electrically connected to the battery cell, the control box including a second housing and a base plate, the base plate covering the opening side of the second housing, the base plate being connected to the cover plate.

[0006] In the technical solution of this application embodiment, both the cover plate of the high-voltage box and the bottom plate of the control box are planar structures, and they are connected in close contact without the need for additional support structures. Eliminating the need for dedicated fixing brackets reduces the space occupied by the brackets in the mounting cavity, preventing the brackets from compressing the arrangement of other components. The space originally occupied by the brackets can be used to increase the number of battery cells or to reserve more reasonable spacing between them, which helps to improve the energy density of the battery device. Simultaneously, it provides more ample space for the design of the cooling system's air ducts and the neat arrangement of connecting lines, allowing for a more compact and reasonable layout of the components within the mounting cavity, further optimizing the overall structural design of the battery device.

[0007] In some embodiments, one of the cover plate and the bottom plate has a gourd-shaped hole, which includes a first through hole and a second through hole. The first through hole communicates with the second through hole, and the diameter of the first through hole is smaller than the diameter of the second through hole. The other of the cover plate and the bottom plate includes a plate body and a connecting protrusion. The connecting protrusion includes: a first protrusion connected to the side surface of the plate body facing the cover plate, and a second protrusion connected to the side surface of the first protrusion away from the plate body. Along a first direction, the orthographic projection of the first protrusion on the projection plane is located within the orthographic projection of the second protrusion on the projection plane, the orthographic projection of the second protrusion on the projection plane is located within the orthographic projection of the second through hole on the projection plane, the orthographic projection of the first through hole on the projection plane is located within the orthographic projection of the second protrusion on the projection plane, and the orthographic projection of the first protrusion on the projection plane is located within the orthographic projection of the first through hole on the projection plane. The first direction is the arrangement direction of the first protrusion and the second protrusion. The projection plane is perpendicular to the first direction. The second protrusion and the plate body are located on opposite sides of the cover plate, respectively. During assembly, the second protrusion can be inserted into one side of the cover plate through the larger diameter second through hole, and then the control box can be pushed along the connecting direction of the two through holes to make the first protrusion slide into the first through hole. With the help of the stepped limit formed by the projection adaptation relationship, precise positioning can be completed without complicated alignment operations, which greatly shortens the assembly time and improves production efficiency.

[0008] In some embodiments, the cover plate also has a cantilever hole located on the same side as the first through hole and the second through hole. One end of the cantilever hole communicates with the second through hole, and the other end faces the first through hole, with the cantilever hole spaced apart from the first through hole. The cantilever formed by the cantilever hole has a certain elastic deformation space. During the sliding process of the connecting protrusion, it can absorb the impact force during assembly through slight elastic deformation, avoiding wear or scratches on the components caused by hard contact. At the same time, the cantilever can be moved during disassembly or installation, making it easier for the connecting protrusion to slide into the first through hole, facilitating installation.

[0009] In some embodiments, the cantilever hole is elongated, extending along the arrangement direction of the first and second through holes. The elongated structure, extending along the arrangement direction of the first and second through holes, makes the cantilever formed by the cantilever hole a regular elongated shape with a uniformly distributed elastic deformation area. The elongated cantilever can generate smooth elastic deformation when the connecting protrusion slides, more efficiently absorbing assembly impact forces, avoiding excessive deformation or poor recovery caused by localized stress concentration, reducing hard contact wear between the connecting protrusion and the hole wall, and protecting the structural integrity of the cantilever itself.

[0010] In some embodiments, along the first direction, the thickness of the first protrusion is greater than or equal to the thickness of the cover plate. Matching the thickness of the first protrusion with the thickness of the cover plate allows the sidewall of the first protrusion to fit snugly against the wall of the first through hole, eliminating radial gaps. Even if vibration occurs during battery device operation, it can reduce the movement of the connecting protrusion within the hole, improve the stability of the connection between the control box and the high-voltage box, and reduce the risk of loosening.

[0011] In some embodiments, the difference between the thickness of the first protrusion and the thickness of the cover plate is less than or equal to 0.5 mm. This thickness difference design allows the first protrusion to form a small-clearance fit with the first through hole, avoiding radial clearance caused by excessive thickness difference, preventing vibration and wobbling of the connecting protrusion within the hole, and ensuring structural stability after the control box and high-voltage box are connected. This difference range provides reasonable error redundancy for assembly, is compatible with the machining tolerances of the cover plate and the first protrusion, and allows for smooth assembly without extremely high machining precision. If the thickness of the first protrusion exceeds that of the cover plate by too much, the second protrusion may interfere with components on the other side of the cover plate, affecting sealing performance or normal component operation. The aforementioned thickness difference controls the exposed size of the second protrusion, avoiding conflicts with surrounding structures and ensuring overall assembly compatibility.

[0012] In some embodiments, the cover plate has multiple gourd-shaped holes, and the base plate has multiple connecting protrusions corresponding one-to-one with the multiple gourd-shaped holes. The first through hole of the gourd-shaped hole is located on the same side as the second through hole. The multiple one-to-one corresponding connection points form a multi-point fixing structure. Compared with single-point connection, the weight of the control box and the vibration load during operation can be evenly distributed to multiple areas of the cover plate, avoiding structural deformation or loosening of connections caused by local stress concentration, and making the overall connection strength more reliable.

[0013] In some embodiments, the diameter of the second through hole is greater than or equal to 8 mm and less than or equal to 15 mm. This diameter range matches the size requirements of the second protrusion in the connecting protrusion, providing sufficient space for the second protrusion to pass through, avoiding assembly jamming due to an excessively small hole diameter, and preventing excessive gaps between the protrusion and the hole wall due to an excessively large hole diameter. At the same time, a sufficient hole diameter can accommodate slight alignment deviations during assembly, reducing the alignment difficulty of manual or automated assembly and improving assembly efficiency.

[0014] In some embodiments, the diameter of the first through hole is greater than or equal to 1 mm and less than or equal to 5 mm. The diameter of the first through hole within the above range can be adapted to the size of the first protrusion, which can limit radial displacement by fitting the hole wall with the side wall of the protrusion to avoid shaking after connection, and can also ensure smooth sliding locking by means of appropriate fitting clearance.

[0015] In some embodiments, the first protrusion is a cylindrical protrusion, the height direction of the first protrusion is parallel to the first direction, and the bottom diameter of the first protrusion is greater than or equal to 1 mm and less than or equal to 3 mm. The cylindrical structure fits snugly with the circular shape of the first through hole, and the 1 mm-3 mm bottom diameter provides sufficient contact area, effectively limiting radial displacement and preventing shaking due to vibration after connection. Simultaneously, this diameter range forms a reasonable clearance with the size of the first through hole, ensuring both tight locking and preventing assembly jamming due to excessive interference.

[0016] In some embodiments, the cover plate has a limiting structure on the side facing the base plate, which abuts against the base plate. The limiting structure locks the relative position of the control box and the high-voltage box by abutting against the base plate, preventing lateral displacement or torsion along the mating surface during assembly or use.

[0017] In some embodiments, the cover plate has a limiting hole forming an elastic arm on the cover plate. The elastic arm is a limiting structure, and a limiting protrusion is provided on the side surface of the elastic arm facing the base plate, which abuts against the base plate. The elastic deformation capability of the elastic arm allows the limiting protrusion to adapt to the assembly deviation of the base plate, compensating for the small gaps in the mating surfaces through slight deformation, and maintaining a tight fit. Compared with a rigid limiting structure, this effectively avoids positioning loosening or interference caused by processing errors, further improving the relative positional accuracy of the control box and the high-voltage box.

[0018] In some embodiments, the thickness of the limiting protrusion is greater than or equal to 0.1 mm and less than or equal to 0.8 mm. The thickness of the limiting protrusion within this range allows it to generate sufficient abutment pressure under the elastic tension of the elastic arm, without causing difficulty in deformation of the elastic arm and failure to tightly adhere to the base plate due to excessive thickness. The limiting protrusion enables the elastic arm to undergo adaptive deformation, maintaining stable contact with the base plate and preventing loosening due to excessive thickness.

[0019] In some embodiments, the cover plate has multiple limiting structures, with a base plate abutting against at least two of the limiting structures. This multi-point abutment distributes the load and vibration stress of the base plate across multiple limiting structures, preventing deformation and breakage of a single limiting structure due to concentrated stress. It also reduces the stress burden on the connecting protrusion, further extending the service life of the connecting protrusion and the limiting structures.

[0020] In some embodiments, the battery device further includes foam located in the mounting cavity, between the inner wall of the housing and the control box. The elastic properties of the foam can effectively absorb the vibration energy generated during the operation of the battery device, weaken the impact and vibration transmitted from the housing to the control box, reduce the possibility of problems such as solder joint detachment and structural loosening of precision electronic components in the control box due to long-term vibration, and extend the service life of the control box.

[0021] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

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

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0026] Figure 2 This is an exploded structural diagram of a battery provided in some embodiments of this application;

[0027] Figure 3 A top view of a high-voltage box provided in some embodiments of this application;

[0028] Figure 4 A perspective view of the control box provided in some embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the structure of a base plate provided in an embodiment of this application;

[0030] Figure 6 A bottom view of a base plate provided in an embodiment of this application;

[0031] Figure 7 for Figure 6 Cross-sectional view of the BB surface;

[0032] Figure 8 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 9 A cross-sectional schematic diagram of the fit between a base plate and a cover plate provided in an embodiment of this application;

[0034] Figure 10 for Figure 3 A magnified 3D view of point C in the middle;

[0035] Figure 11 for Figure 3 Cross-sectional view of the DD plane.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1000, Vehicle; 100, Battery Unit; 200, Control Components; 300, Motor; 10, Housing; 11, First Part; 12, Second Part; 101, Mounting Cavity; 20, Battery Cell; 30, High Voltage Box; 31, Cover Plate; 311, Hoist Hole; 3111, First Through Hole; 3112, Second Through Hole; 312, Cantilever Hole; 313, Cantilever; 314, Limiting Hole; 315, Elastic Arm; 316, Limiting Protrusion; 32, Limiting Structure; 40, Control Box; 41, Second Box Body; 42, Base Plate; 421, Plate Body; 422, Connecting Protrusion; 4221, First Protrusion; 4222, Second Protrusion. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In the description of the embodiments of this application, the term "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).

[0044] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0047] The battery pack mainly consists of a sealed and protected enclosure and several individual battery cells arranged within the enclosure's interior. To enable real-time monitoring of the battery pack's operating status, a control box integrating core control functions is also installed inside the enclosure. This control box encapsulates a series of control electrical components, including a voltage acquisition chip, a temperature sensor, and a signal processing module. These control electrical components are electrically connected to each individual battery cell through pre-set detection circuits, continuously collecting key operating data such as voltage changes and temperature fluctuations during the charging and discharging process. After data integration and analysis, this data is fed back to the battery control system, thereby achieving comprehensive monitoring of the battery pack's remaining charge, health status, and safety risks, ensuring the stable and reliable operation of the battery pack.

[0048] In practical applications of related technologies, control boxes typically require a specially designed bracket structure for fixed connection to the enclosure. To meet the stability requirements of the control box installation, these brackets often need to possess a certain structural strength and installation precision, resulting in a large overall size and significant space occupation. Since the internal space of the battery pack is already limited, the additional space occupied by the bracket will squeeze the area for other functional components. This may not only limit the arrangement density of individual battery cells and affect the energy density improvement of the battery pack, but also cause inconvenience to the rational layout of other supporting components such as the heat dissipation system and connecting lines. Furthermore, space conflicts may increase the installation difficulty and reduce assembly efficiency of some components, indirectly affecting the overall design rationality and manufacturing cost of the battery pack.

[0049] This application provides a battery device comprising a housing, individual battery cells, a high-voltage box, and a control box. The housing has a mounting cavity, in which the individual battery cells, high-voltage box, and control box are all located. The individual battery cells and high-voltage box are arranged at intervals, and the control box is electrically connected to the individual battery cells. The high-voltage box includes a first housing and a cover plate, with the cover plate covering the opening side of the first housing. The control box includes a second housing and a base plate, with the base plate covering the opening side of the second housing. The base plate is connected to the cover plate. Both the cover plate of the high-voltage box and the base plate of the control box are planar structures, fitting together without the need for additional support structures. Eliminating the need for dedicated fixing brackets reduces the space occupied by brackets in the housing mounting cavity, preventing brackets from compressing the arrangement of other components. The space originally occupied by brackets can be used to increase the number of individual battery cells or to reserve more reasonable spacing between them, which helps to improve the energy density of the battery device. At the same time, it also provides more ample space for the design of the cooling system's air duct and the orderly arrangement of connecting lines, making the layout of each component in the mounting cavity more compact and reasonable, further optimizing the overall structural design of the battery device.

[0050] The battery device disclosed in this application can be used, but is not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system incorporating the battery device disclosed in this application can be used to form such an electrical device or energy storage device.

[0051] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0052] This application also provides an energy storage device that uses a battery device as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery device, or a portable energy storage system.

[0053] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0054] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 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. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a control component 200 and a motor 300. The control component 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0055] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a mounting cavity 101 for the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining the mounting cavity 101 for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the mounting cavity 101; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0057] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0058] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0059] This application provides a battery device 100, which also includes a high-voltage box 30 and a control box 40. Figure 3 A top view of a high-voltage box provided for some embodiments of this application. Figure 4 This is a perspective structural diagram of a control box provided in some embodiments of this application. (In conjunction with...) Figures 2 to 4 Both the high-voltage box 30 and the control box 40 are located in the mounting cavity 101. Battery cells 20 are arranged spaced apart from the high-voltage box 30, and the control box 40 is electrically connected to the battery cells 20. The high-voltage box 30 includes a first box body and a cover plate 31, with the cover plate 31 covering the opening side of the first box body; see [link to documentation]. Figure 4 The control box 40 includes a second box body 41 and a base plate 42, with the base plate 42 covering the open side of the second box body 41. The base plate 42 is connected to the cover plate 31.

[0060] In the embodiments of this application, both the battery cell 20 and the high-voltage box 30 are in contact with the bottom wall of the housing 10. The control box 40 is located on the same side of the battery cell 20 and the high-voltage box 30, and the arrangement direction of the battery cell 20 and the high-voltage box 30 is parallel to the surface of the bottom wall.

[0061] The high-voltage box 30 is a component in the battery device 100 responsible for the distribution and safety management of high-voltage power. It is usually installed inside the enclosure 10 near the power output end. The high-voltage box 30 distributes the high-voltage DC power output from the battery cells 20 (connected in series / parallel) to high-voltage electrical equipment such as motors, chargers, and air conditioning compressors as needed. It also integrates high-voltage input, output, and pre-charge circuits.

[0062] The high-voltage box 30 incorporates high-voltage relays, fuses, contactors, and other components, enabling it to quickly disconnect the high-voltage circuit in case of overload, short circuit, leakage, or emergency shutdown, thus preventing safety risks such as electric shock and fire. The high-voltage box 30 also provides unified management of high-voltage wiring harness connection interfaces, reducing wiring clutter and improving the assembly standardization and maintenance convenience of the high-voltage system.

[0063] In the embodiments of this application, the high-voltage box 30 serves as a high-voltage power distribution device for the battery device 100. Its structural design balances protection and ease of assembly. Specifically, it includes a first box body that forms a cavity for accommodating high-voltage components, and a cover plate 31 that fits the first box body. The first box body can be manufactured using an integral molding process, and it has an opening on one side to facilitate the installation and maintenance of core high-voltage components such as high-voltage relays and fuses. The cover plate 31 can be detachably closed to the opening side using bolts, clips, or other detachable structures to form a sealed protective space. This not only isolates the high-voltage components from dust, moisture, and other impurities inside the box, but also ensures the safe isolation of the high-voltage circuit.

[0064] The control box 40 is the "data acquisition and control center" of the battery device 100. The control box 40 integrates various electronic components and interacts with the battery cells 20, the high-voltage box 30, and the BMU (Battery Management Unit). For example, a cell supervision controller (CSC) can be installed within the control box 40. The CSC uses components such as a voltage acquisition module, temperature sensor, and current sensor to collect data such as the voltage and temperature of the battery cells 20, as well as the current in the circuit, in real time.

[0065] The control box 40 processes the collected data to determine the remaining charge (SOC) and state of health (SOH) of the battery device 100, and identifies abnormal operating conditions such as overcharging, over-discharging, and overheating. The control box 40 can feed back the monitoring results to the main controller, and at the same time receive control commands to coordinate with components such as the high-voltage box 30 to perform corresponding operations, ensuring that the battery device 100 operates stably within a safe range.

[0066] In the embodiments of this application, the structural design of the control box 40 is adapted and linked with the high-voltage box 30, including a second box body 41 with an internal electronic component mounting cavity, and a base plate 42 for sealing the mounting cavity. One side of the second box body 41 also has an opening to facilitate the assembly of precision control electronic components such as voltage acquisition modules and signal processing chips. The base plate 42 is detachably connected to the opening side of the second box body 41 using screws, locking pins, or other means, achieving sealing protection and fixation of the internal precision components.

[0067] The cover plate 31 seals the opening side of the high-voltage box 30, and the base plate 42 seals the opening side of the control box 40. The two together form a double-sealed protective structure. This not only protects the internal components, but also further isolates external impurities from intrusion through sealing treatment of the connection surfaces (such as adding sealing gaskets), preventing high-voltage components and control components from malfunctioning due to environmental factors and extending their service life.

[0068] In the embodiments of this application, the base plate 42 and the cover plate 31 may be detachably connected, or the base plate 42 and the cover plate 31 may be non-detachably connected.

[0069] For example, the base plate 42 and the cover plate 31 can be connected by welding; or the base plate 42 and the cover plate 31 can be connected by adhesive; or the base plate 42 and the cover plate 31 can be connected by bolts; or the base plate 42 and the cover plate 31 can be connected by snap-fit.

[0070] Both the cover plate 31 of the high-voltage box 30 and the base plate 42 of the control box 40 are flat structures, fitting together seamlessly without the need for additional support structures. Eliminating the need for dedicated fixing brackets reduces the space occupied by brackets in the mounting cavity 101 of the enclosure 10, preventing the brackets from compressing the arrangement of other components. The space previously occupied by brackets can be used to increase the number of battery cells 20 or to allow for more reasonable spacing between them, helping to improve the energy density of the battery device 100. Simultaneously, it provides more ample space for the airflow design of the cooling system and the neat arrangement of connecting lines, allowing for a more compact and rational layout of components within the mounting cavity 101, further optimizing the overall structural design of the battery device.

[0071] No separate processing or installation of brackets is required, reducing the manufacturing, transportation, and assembly steps of the brackets. During assembly, the base plate 42 and the cover plate 31 can be aligned and connected to achieve the connection between the high-voltage box 30 and the control box 40, and then the whole assembly is installed into the mounting cavity 101 of the enclosure, simplifying the assembly process. At the same time, it avoids the assembly adjustment work caused by the accuracy requirements of bracket installation, and also reduces the obstruction of component installation caused by spatial conflicts, improving the overall assembly efficiency of the battery device 100 and shortening the production cycle.

[0072] Eliminating the support structure not only reduces the material and processing costs of the support itself, but also lowers the costs associated with the support, such as the costs of auxiliary processing and assembly tools. At the same time, the reduction in the number of components also reduces the risk of errors during assembly and decreases subsequent maintenance costs due to issues such as support loosening or deformation. From a life-cycle perspective, this reduces the overall cost of the battery device 100.

[0073] After the control box 40 is connected to the high-voltage box 30, it can be fixed by the inherent installation stability of the high-voltage box 30, without relying on additional brackets. As a core component of high-voltage power distribution, the high-voltage box 30 itself has high structural strength and installation precision. The direct connection between the two reduces the risk of loosening in intermediate connection links, making the control box more secure. At the same time, it shortens the signal transmission path between the control box 40 and the high-voltage box 30, reduces signal interference, and further ensures the coordinated reliability of battery device 100 status monitoring and high-voltage control.

[0074] Both the base plate 42 and the cover plate 31 are planar structures, and the planar contact connection can increase the stress area.

[0075] Eliminating the need for traditional brackets, the control box 40 is directly mounted on the cover plate 31 of the high-voltage box 30 via the base plate 42, forming a compact stacked layout that significantly reduces the space occupied within the mounting cavity 101. This integrated layout not only avoids wasted space but also provides more space for other components such as the battery cell 20 and the heat dissipation system, helping to improve the energy density and structural design rationality of the battery device 100.

[0076] The detachable connection design of the cover plate 31 and the base plate 42 allows the high-voltage box 30 and the control box 40 to be assembled and reassembled separately, or to be quickly disassembled for subsequent maintenance. When it is necessary to repair high-voltage components or control electrical devices, the connection structure between the two can be directly disassembled, or the cover plate 31 and the base plate 42 can be disassembled separately for targeted operations, without having to disassemble the connection between the entire high-voltage box 30 or control box 40 and the enclosure 10, reducing assembly difficulty and maintenance costs, and improving production and after-sales efficiency.

[0077] According to some embodiments of this application, Figure 5 This is a schematic diagram of the structure of a base plate provided in an embodiment of this application. Figure 6 This is a bottom view of a base plate provided in an embodiment of this application. Figure 7 for Figure 6 Cross-sectional view of the BB surface. Figure 8 for Figure 3 A magnified view of point A in the middle. Combined with... Figures 3 to 8 One of the cover plate 31 and the bottom plate 42 has a gourd-shaped hole 311. The gourd-shaped hole 311 includes a first through hole 3111 and a second through hole 3112. The first through hole 3111 communicates with the second through hole 3112. The diameter D1 of the first through hole 3111 is smaller than the diameter D2 of the second through hole 3112. The other of the cover plate 31 and the bottom plate 42 includes a plate body 421 and a connecting protrusion 422. The connecting protrusion 422 is connected to the side surface of the plate body 421 facing the cover plate 31.

[0078] The connecting protrusion 422 includes a first protrusion 4221 and a second protrusion 4222. The first protrusion 4221 is connected to the side surface of the plate 421 facing the cover plate 31, and the second protrusion 4222 is connected to the side surface of the first protrusion 4221 away from the plate 421. Along the first direction X, the orthographic projection of the first protrusion 4221 on the projection surface is located within the orthographic projection of the second protrusion 4222 on the projection surface, the orthographic projection of the second protrusion 4222 on the projection surface is located within the orthographic projection of the second through hole 3112 on the projection surface, the orthographic projection of the first through hole 3111 on the projection surface is located within the orthographic projection of the second protrusion 4222 on the projection surface, and the orthographic projection of the first protrusion 4221 on the projection surface is located within the orthographic projection of the first through hole 3111 on the projection surface. The first direction X is the arrangement direction of the first protrusion 4221 and the second protrusion 4222. The projection surface is perpendicular to the first direction X. The second protrusion 4222 and the plate 421 are located on opposite sides of the cover plate 31.

[0079] In some embodiments of this application, the cover plate 31 has a gourd-shaped hole 311, and the bottom plate 42 includes a plate body 421 and a connecting protrusion 422.

[0080] In some other embodiments of this application, the base plate 42 has a gourd-shaped hole 311, and the cover plate 31 includes a plate body 421 and a connecting protrusion 422.

[0081] To facilitate the subsequent explanation and description of the technical solution, the following text will take the structural form of "gourd hole 311 is opened in cover plate 31, and bottom plate 42 is composed of plate body 421 and connecting protrusion 422" as an example for detailed explanation.

[0082] The cover plate 31 of the high-voltage box 30 is provided with a gourd hole 311 for quick positioning connection with the control box 40. The gourd hole 311 can be an integrally formed irregular through hole structure, specifically composed of a first through hole 3111 and a second through hole 3112 of different sizes. The diameter D1 of the first through hole 3111 is smaller than the diameter D2 of the second through hole 3112. This size difference design provides a structural basis for the subsequent insertion and locking of the connection protrusion, ensuring that the connection process is both convenient and can achieve precise positioning.

[0083] For example, the cover plate 31 is generally rectangular in shape, and the first through hole 3111 and the second through hole 3112 are connected along the length or width direction of the cover plate 31.

[0084] The base plate 42 includes a plate body 421 for supporting control electrical components, and a connecting protrusion 422 integrally formed on the surface of the plate body 421 facing the cover plate 31. The connecting protrusion 422 adopts a stepped structure design, specifically divided into a first protrusion 4221 directly connected to the plate body 421, and a second protrusion 4222 fixedly connected to the surface of the first protrusion 4221 away from the plate body 421. The two are coaxially arranged and form a distinct stepped structure.

[0085] When installing the high-voltage box 30 and the control box 40, the second protrusion 4222 is passed through the second through hole 3112, and then the second protrusion 4222 is moved toward the first through hole 3111. The second protrusion 4222 is locked on the other side surface of the cover plate 31.

[0086] From a spatial perspective, taking the arrangement direction of the first protrusion 4221 and the second protrusion 4222 as the first direction X, and selecting a plane perpendicular to the first direction X as the projection plane, the projections of each component satisfy a strict fitting relationship: the orthographic projection of the first protrusion 4221 is completely located within the orthographic projection range of the second protrusion 4222, forming a stepped limiting structure; the orthographic projection of the second protrusion 4222 can completely fall within the orthographic projection of the second through hole 3112, ensuring that the second protrusion 4222 can smoothly pass through the second through hole 3112; the orthographic projection of the first through hole 3111 is located inside the orthographic projection of the second protrusion 4222, and at the same time, the orthographic projection of the first protrusion 4221 can be completely fitted within the orthographic projection range of the first through hole 3111, providing structural protection for locking after connection. After assembly, the second protrusion 4222 and the plate 421 are respectively attached to the opposite sides of the cover plate 31. Through the contact surface between the plate 421 and the cover plate 31 and the limiting effect of the stepped protrusion, the control box 40 and the high voltage box 30 are positioned and stably connected.

[0087] During assembly, the second protrusion 4222 can be inserted into one side of the cover plate 31 through the larger diameter second through hole 3112, and then the control box 40 can be pushed along the direction of the connection between the two through holes, so that the first protrusion 4221 slides into the first through hole 3111. With the help of the stepped limit formed by the projection adaptation relationship, precise positioning can be completed without complicated alignment operations, which greatly shortens the assembly time and improves production efficiency.

[0088] The stepped connecting protrusion 422 and the gourd hole 311 project to fit together, forming a multi-dimensional limiting structure. The tight fit between the first protrusion 4221 and the first through hole 3111 restricts radial displacement, while the contact surface between the second protrusion 4222 and the cover plate 31 and the pressing action of the plate 421 restrict axial displacement, effectively resisting the influence of external forces such as vibration and impact, and preventing the connection from loosening.

[0089] The integrated design connecting the protrusion 422 and the gourd hole 311 eliminates the need for additional brackets or complex connectors, achieving fixation directly through the component's own structure. This ensures connection strength while minimizing space occupation, further optimizing the internal layout of the housing 10 and reserving more space for other components.

[0090] When disassembly is required, simply push the control box 40 in the reverse direction to slide the first protrusion 4221 from the first through hole 3111 back to the second through hole 3112, and the connecting protrusion 422 can be pulled out as a whole without disassembling bolts or other fasteners. This detachable design reduces the difficulty of disassembly and assembly during maintenance, and reduces after-sales maintenance costs and time.

[0091] Meanwhile, the weight of the cover plate 31 can be reduced because the cover plate 31 is provided with a gourd hole 311.

[0092] According to some embodiments of this application, see Figure 3 The cover plate 31 also has a cantilever hole 312, which is located on the same side of the first through hole 3111 and the second through hole 3112. One end of the cantilever hole 312 is connected to the second through hole 3112, and the other end of the cantilever hole 312 faces the first through hole 3111. The cantilever hole 312 is spaced apart from the first through hole 3111.

[0093] Based on the gourd hole 311, the cover plate 31 of the high-voltage box 30 also has an integrally formed cantilever hole 312 for optimizing assembly flexibility. The cantilever hole 312, together with the first through hole 3111 and the second through hole 3112, forms a continuous irregular hole system structure.

[0094] One end of the cantilever hole 312 is smoothly connected to the side wall of the second through hole 3112, and the connection point adopts an arc transition design to avoid stress concentration; the other end extends towards the first through hole 3111 along the connection direction between the first through hole 3111 and the second through hole 3112, so that a cantilever 313 is formed between the first through hole 3111 and the cantilever hole 312, and the cantilever 313 has a certain degree of elasticity.

[0095] The cantilever 313 formed by the cantilever hole 312 has a certain elastic deformation space. During the sliding process of the connecting protrusion 422, it can absorb the impact force during assembly through slight elastic deformation, avoiding wear or scratches on the parts caused by hard contact. At the same time, the cantilever 313 can be moved during disassembly or installation, making it easier for the connecting protrusion 422 to slide into the first through hole 3111, which facilitates installation.

[0096] According to some embodiments of this application, the cantilever hole 312 is elongated and extends along the arrangement direction of the first through hole 3111 and the second through hole 3112.

[0097] The elongated structure extends along the arrangement direction of the first through hole 3111 and the second through hole 3112, making the cantilever 313 formed by the cantilever hole 312 a regular elongated shape with a uniform distribution of elastic deformation area. The elongated cantilever 313 can generate stable elastic deformation when the connecting protrusion 422 slides, more efficiently absorbing assembly impact force, avoiding excessive deformation or poor recovery caused by local stress concentration, reducing hard contact wear between the connecting protrusion 422 and the hole wall, and protecting the structural integrity of the cantilever 313 itself.

[0098] During assembly, as the connecting protrusion 422 slides along the channel of the gourd hole 311, the elastic cantilever 313 can adapt to the sliding trajectory of the connecting protrusion 422 through slight deformation, reducing sliding resistance. When the cantilever 313 is turned, the elongated structure can evenly transmit the force to the entire cantilever 313, driving the channel to be finely adjusted, so that the connecting protrusion 422 can slide into the first through hole 3111 more smoothly, reducing the difficulty of assembly operation.

[0099] The elastic cantilever 313 formed by the elongated cantilever hole 312 has its stress points evenly distributed along its length. During disassembly, simply moving the cantilever 313 gently expands the channel space, allowing the connecting protrusion 422 to smoothly slide from the first through hole 3111 back to the second through hole 3112. This eliminates the need for complex tools or forceful operation, simplifying the disassembly and assembly process. Especially during after-sales maintenance, it shortens the time required to separate the control box 40 from the high-voltage box 30, improving maintenance efficiency.

[0100] According to some embodiments of this application, along the first direction X, Figure 9 This is a cross-sectional schematic diagram of a base plate and a cover plate fitting together, provided as an embodiment of this application. See also... Figure 9 The thickness D3 of the first protrusion 4221 is greater than or equal to the thickness D4 of the cover plate 31.

[0101] The first direction X is the arrangement direction of the first protrusion 4221 and the second protrusion 4222 in the connecting protrusion 422, and it is also the assembly and fitting direction of the control box 40 and the high voltage box 30.

[0102] The thickness D3 of the first protrusion 4221 matches the thickness D2 of the cover plate 31, allowing the sidewall of the first protrusion 4221 to fit snugly against the wall of the first through hole 3111, eliminating radial gaps. Even if vibration occurs during battery operation, it can reduce the shaking of the connecting protrusion 422 within the hole, improving the stability of the connection between the control box 40 and the high-voltage box 30 and reducing the risk of loosening.

[0103] According to some embodiments of this application, the difference between the thickness D3 of the first protrusion 4221 and the thickness D4 of the cover plate 31 is less than or equal to 0.5 mm.

[0104] For example, the difference between the thickness D3 of the first protrusion 4221 and the thickness D4 of the cover plate 31 is equal to 0.1 mm; or the difference between the thickness D3 of the first protrusion 4221 and the thickness D4 of the cover plate 31 is equal to 0.2 mm; or the difference between the thickness D3 of the first protrusion 4221 and the thickness D4 of the cover plate 31 is equal to 0.3 mm; or the difference between the thickness D3 of the first protrusion 4221 and the thickness D4 of the cover plate 31 is equal to 0.4 mm; or the difference between the thickness D3 of the first protrusion 4221 and the thickness D4 of the cover plate 31 is equal to 0.5 mm.

[0105] The design with D3-D4 ≤ 0.5mm allows the first protrusion 4221 to form a small clearance fit with the first through hole 3111, avoiding radial clearance caused by excessive thickness difference, preventing the connecting protrusion 422 from vibrating and shaking within the hole, and ensuring the structural stability of the control box 40 and high-voltage box 30 after connection. This difference range provides reasonable error redundancy for assembly, is compatible with the machining tolerances of the cover plate 31 and the first protrusion 4221, and can achieve smooth assembly without extremely high machining precision. If the thickness of the first protrusion 4221 exceeds the cover plate 31 by too much, the second protrusion 4222 may interfere with the components on the other side of the cover plate 31, affecting the sealing performance or normal operation of the components. D3-D4 ≤ 0.5mm controls the exposed size of the second protrusion 4222, avoiding conflicts with surrounding structures and ensuring the compatibility of the overall assembly.

[0106] A smaller thickness difference allows the sidewall of the first protrusion 4221 to fit snugly against the wall of the first through hole 3111, enabling uniform load transfer and reducing local stress concentration. Especially in vibration environments, it avoids uneven stress distribution caused by excessive gaps, extending the service life of the connection structure.

[0107] According to some embodiments of this application, see Figure 3 The cover plate 31 has multiple gourd-shaped holes 311, and the bottom plate 42 has multiple connecting protrusions 422 corresponding to the multiple gourd-shaped holes 311. The first through hole 3111 of the gourd-shaped holes 311 is located on the same side as the second through hole 3112.

[0108] Along a preset arrangement trajectory, the cover plate 31 of the high-voltage box 30 has multiple identical gourd-shaped holes 311. These gourd-shaped holes 311 are evenly distributed on the edge of the cover plate 31 or in designated assembly areas, forming a symmetrical or balanced layout of connection points. Each gourd-shaped hole 311 follows a unified structural design standard, consisting of a smaller diameter first through hole 3111 and a larger diameter second through hole 3112 connected together. Furthermore, the first through holes 3111 in all gourd-shaped holes 311 are arranged facing the same side, ensuring that the force direction and assembly guidance of each connection point are consistent, laying the foundation for precise docking with the control box 40.

[0109] At the corresponding positions of the gourd holes 311 on the base plate 42, multiple connecting protrusions 422 are also provided. The number and spacing of the connecting protrusions 422 match the gourd holes 311 to achieve a one-to-one assembly relationship. Each connecting protrusion 422 is a stepped structure, including a first protrusion 4221 and a second protrusion 4222. Its size and specifications are adapted to the first through hole 3111 and the second through hole 3112 of a single gourd hole 311, ensuring that each connecting protrusion 422 can smoothly pass into the corresponding gourd hole 311 and complete locking and positioning during assembly.

[0110] Multiple one-to-one connection points form a multi-point fixing structure. Compared with single-point connection, the weight of the control box 40 and the vibration load during operation can be evenly distributed to multiple areas of the cover plate 31, avoiding structural deformation or loosening of connections caused by local stress concentration, and making the overall connection strength more reliable.

[0111] All the first through holes 3111 face the same side. With the multi-point one-to-one correspondence design, during assembly, all connecting protrusions 422 and gourd holes 311 can be positioned and locked by overall alignment and synchronous sliding. This avoids directional deviation during single-point assembly and ensures the relative positional accuracy of the control box 40 and high-voltage box 30, improving assembly consistency during mass production.

[0112] Multi-point synchronous assembly eliminates the need to align individual connection points one by one. All connection protrusions 422 can be passed through the corresponding second through holes 3112 simultaneously, and then the control box 40 can be pushed in a unified direction to lock all connection protrusions 422 with the first through holes 3111. This reduces assembly steps and shortens operation time.

[0113] The design with multiple connection points is compatible with minor machining errors or assembly deviations. Even if a single point has a slight deviation, the remaining points can still ensure the stability of the overall connection, avoiding assembly failures caused by single-point failures. At the same time, the unified orientation design reduces the cost of orientation judgment during assembly, reduces the risk of misoperation, and improves the fault tolerance rate of the assembly process.

[0114] According to some embodiments of this application, the diameter D2 of the second through hole 3112 is greater than or equal to 8 mm and less than or equal to 15 mm.

[0115] For example, the diameter D2 of the second through hole 3112 is equal to 8 mm; or the diameter D2 of the second through hole 3112 is equal to 10 mm; or the diameter D2 of the second through hole 3112 is equal to 12 mm; or the diameter D2 of the second through hole 3112 is equal to 15 mm.

[0116] This diameter range can match the size requirements of the second protrusion 4222 in the connecting protrusion 422, providing sufficient space for the second protrusion 4222 to pass through, avoiding assembly jamming due to an excessively small hole diameter, and preventing excessive gap between the protrusion and the hole wall due to an excessively large hole diameter. At the same time, a sufficient hole diameter can accommodate slight alignment deviations during assembly, reducing the alignment difficulty of manual or automated assembly and improving assembly efficiency.

[0117] The diameter of the second through hole 3112 is within the aforementioned range, which can reduce damage to the structural integrity of the cover plate 31 while meeting the assembly function. If the hole diameter is too small, the size of the second protrusion 4222 will be limited and the structural strength will be insufficient; if the hole diameter is too large, it will weaken the load-bearing capacity of the cover plate 31, especially when multiple gourd holes 311 are arranged, which can easily cause stress concentration. This range can ensure that the cover plate 31 can still maintain good structural strength and resist the influence of external forces such as vibration and impact after the gourd holes 311 are opened.

[0118] When the cover plate 31 is provided with multiple gourd holes 311, the diameter D2 of the second through hole 3112 can be reasonably arranged within the limited space of the cover plate 31 within the above-mentioned range. This avoids excessive spacing between points due to excessively large hole diameters, which would occupy too much space, or insufficient hole diameters that would affect the assembly operation of adjacent points. This size can balance the functional requirements of a single through hole with the rationality of the layout of multiple points, ensuring that the overall connection structure is compact and efficient.

[0119] According to some embodiments of this application, the diameter D1 of the first through hole 3111 is greater than or equal to 1 mm and less than or equal to 5 mm.

[0120] For example, the diameter D1 of the first through hole 3111 is equal to 1 mm; or the diameter D1 of the first through hole 3111 is equal to 1 mm; or the diameter D1 of the first through hole 3111 is equal to 2 mm; or the diameter D1 of the first through hole 3111 is equal to 3.2 mm; or the diameter D1 of the first through hole 3111 is equal to 5 mm.

[0121] The diameter D1 of the first through hole 3111 can be adapted to the size of the first protrusion 4221 within the above range. This not only restricts radial displacement by fitting the hole wall with the side wall of the protrusion to avoid shaking after connection, but also ensures smooth sliding locking by using appropriate fitting clearance.

[0122] The first through hole 3111 serves as a locking structure. Controlling the diameter D1 of the first through hole 3111 within 1-5mm reduces structural damage to the cover plate 31. An excessively large hole diameter can cause the area around the through hole to become a weak point under stress, making it prone to cracking under vibration and impact conditions; an excessively small hole diameter may weaken the fitting space and structural strength of the first protrusion 4221. This range ensures that the overall load-bearing capacity of the cover plate is not affected while fulfilling the locking function.

[0123] When the cover plate 31 is provided with multiple gourd holes 311, the small hole diameter design of 1mm to 5mm can reduce the space occupied by a single first through hole 3111, making it easier to reasonably arrange multiple connection points within the limited area of ​​the cover plate 31. This avoids the problem of excessive spacing between points due to excessively large hole diameter, which would affect the connection balance, and also allows for a more compact layout of multiple points, reserving more space for other structures and improving the overall design rationality.

[0124] According to some embodiments of this application, the first protrusion 4221 is a cylindrical protrusion, the height direction of the first protrusion 4221 is parallel to the first direction X, and the bottom diameter D5 of the first protrusion 4221 is greater than or equal to 1 mm and less than or equal to 3 mm.

[0125] The first protrusion 4221 adopts a regular cylindrical design, and its height extension direction is parallel to the first direction X, ensuring that it is coaxially adapted with the first through hole 3111 on the cover plate 31.

[0126] The cylindrical structure fits snugly with the circular shape of the first through hole 3111, and with a bottom diameter of 1mm-3mm, it forms a sufficient contact area, effectively limiting radial displacement and preventing shaking caused by vibration after connection. At the same time, this diameter range forms a reasonable fit clearance with the size of the first through hole 3111, ensuring both tight locking and preventing assembly jamming due to excessive interference.

[0127] The cylindrical design ensures uniform stress distribution, and the 1mm-3mm base diameter provides sufficient structural strength for the first protrusion 4221, avoiding the risk of bending or breakage due to insufficient diameter. It can stably withstand loads under assembly, insertion, and long-term vibration conditions, guaranteeing the long-term reliability of the connection structure.

[0128] The regular cylindrical shape and the height extension parallel to the first direction provide a natural guiding effect for assembly, facilitating the quick alignment of the first protrusion 4221 and its sliding into the first through hole 3111. At the same time, the reasonable diameter avoids increased sliding resistance due to excessive thickness or positioning deviation due to excessive thinness, thus improving assembly efficiency and accuracy.

[0129] For example, the second protrusion 4222 can also be a cylindrical protrusion. The height direction of the second protrusion 4222 is parallel to the first direction X. The bottom diameter D6 of the second protrusion 4222 is greater than or equal to 4 mm and less than or equal to 10 mm.

[0130] According to some embodiments of this application, the side surface of the cover plate 31 facing the bottom plate 42 has a limiting structure 32, which abuts against the bottom plate 42.

[0131] In some embodiments of this application, the limiting structure 32 and the cover plate 31 are integrated into one piece, requiring no additional assembly.

[0132] In other embodiments, the limiting structure 32 and the cover plate 31 can be connected by welding, bonding or bolting.

[0133] For example, the limiting structure 32 can be a protruding limiting block, a limiting ring arranged around the gourd hole 311, or a limiting boss provided along the edge of the cover plate 31. The structural form is determined according to the assembly positioning requirements. Its core function is to form a tight abutment with the side surface of the base plate 42 facing the cover plate 31. After assembly, the abutment surface of the limiting structure 32 fits against the base plate 42, which does not affect the locking fit between the connecting protrusion 422 and the gourd hole 311, and can also form a rigid constraint on the position of the base plate 42.

[0134] The limiting structure 32 locks the relative position of the control box 40 and the high voltage box 30 by abutting against the base plate 42, preventing them from shifting or twisting laterally along the mating surface during assembly or use.

[0135] According to some embodiments of this application, Figure 10 for Figure 3 A magnified 3D view of section C. See also... Figure 10 The cover plate 31 has a limiting hole 314, and the limiting hole 314 forms an elastic arm 315 on the cover plate 31. The elastic arm 315 is a limiting structure. The side surface of the elastic arm 315 facing the bottom plate 42 has a limiting protrusion 316, and the limiting protrusion 316 abuts against the bottom plate 42.

[0136] The cover plate 31 of the high-voltage box 30 is provided with a limiting hole 314 that is adapted to the layout of the gourd hole 311. The limiting hole 314 is an irregular through hole structure. By partially slotting the cover plate 31, an elastic arm 315 with elastic deformation capability is formed around the limiting hole. The elastic arm 315 is integrally formed with the cover plate 31 as a limiting structure 32, without the need for additional assembly parts.

[0137] The elastic arm 315 extends along the surface of the cover plate 31, and a limiting protrusion 316 of moderate height is integrally formed on the side of the elastic arm 315 facing the bottom plate 42 of the control box 40. The side surface of the limiting protrusion 316 facing the bottom plate 42 can be flat to avoid sharp edges from scratching the bottom plate 42. After assembly, the elastic arm 315 uses its own elastic tension to make the limiting protrusion 316 tightly abut against the side surface of the bottom plate 42 facing the cover plate 31, forming a stable pressure contact, while not interfering with the locking fit between the connecting protrusion 422 and the gourd hole 311.

[0138] The elastic deformation capability of the flexible arm 315 allows the limiting protrusion 316 to adapt to the assembly deviation of the base plate 42, compensating for the small gaps in the mating surfaces through slight deformation and maintaining a tight fit. Compared with a rigid limiting structure, this effectively avoids positioning loosening or interference caused by machining errors, further improving the relative positional accuracy between the control box and the high-voltage box.

[0139] During assembly, when the base plate 42 contacts the limiting protrusion 316, the elastic arm 315 deforms, providing a buffer space for the base plate 42 to fit together and avoiding assembly jamming caused by rigid limiting. Even if there is a slight deviation in the assembly position of the base plate 42, the elastic arm can adaptively adjust through deformation, reducing the difficulty of assembly alignment and improving the assembly fault tolerance rate.

[0140] The elastic arm 315 continuously applies elastic pressure to the limiting protrusion 316, ensuring that the limiting protrusion 316 and the base plate 42 remain in tight contact, forming an axial preload. This preload can effectively suppress the loosening tendency of the connection structure under vibration. Together with the locking structure of the connecting protrusion 422 and the gourd hole 311, it forms a two-way fixation, improving the overall connection's vibration resistance and anti-loosening capability.

[0141] According to some embodiments of this application, Figure 11 for Figure 3 Cross-sectional view of the DD plane. See also Figure 11 The thickness D7 of the limiting protrusion 316 is greater than or equal to 0.1 mm and less than or equal to 0.8 mm.

[0142] For example, the thickness D7 of the limiting protrusion 316 is equal to 0.1 mm; or the thickness D7 of the limiting protrusion 316 is equal to 0.2 mm; the thickness D7 of the limiting protrusion 316 is equal to 0.4 mm; the thickness D7 of the limiting protrusion 316 is equal to 0.6 mm; or the thickness D7 of the limiting protrusion 316 is equal to 0.8 mm.

[0143] The thickness D7 of the limiting protrusion 316 is within the above range, which allows the limiting protrusion 316 to form sufficient abutment pressure under the elastic tension of the elastic arm 315, without the elastic arm 315 being difficult to deform and unable to fit tightly against the base plate 42 due to excessive thickness. The limiting protrusion 316 can make the elastic arm 315 produce adaptive deformation, and the limiting protrusion 316 and the base plate 42 maintain stable abutment, avoiding the limiting loosening caused by excessive thickness.

[0144] A minimum thickness of 0.1mm ensures that the limiting protrusion 316 has basic structural strength, preventing breakage and deformation due to excessive thinness; a maximum thickness of 0.8mm prevents it from exerting excessive pressure on the base plate 42, causing deformation of the base plate 42. This range allows the limiting protrusion 316 to be less prone to damage when subjected to abutment force, while also reserving sufficient deformation compensation space for assembly deviations, improving the fault tolerance rate.

[0145] According to some embodiments of this application, the cover plate 31 has a plurality of limiting structures 32, and a base plate 42 abuts against at least two limiting structures 32.

[0146] Multi-point contact disperses the load and vibration stress of the base plate 42 to multiple limiting structures 32, preventing deformation and breakage of a single limiting structure 32 due to concentrated stress. At the same time, it reduces the stress burden on the connecting protrusion 422, further extending the service life of the connecting protrusion 422 and the limiting structure 32.

[0147] Multiple limiting structures 32 work together to apply elastic resistance, forming a multi-directional pre-tightening force that can resist high-frequency vibrations during the operation of the battery device 100. Even if some limiting structures 32 experience minor wear and become unable to retain their positions, the remaining limiting structures 32 can still ensure the overall fixation effect, prevent loosening of the connection, and improve reliability in extreme environments.

[0148] According to some embodiments of this application, the battery device 100 also includes foam located in the mounting cavity 101, between the inner wall of the housing 10 and the control box 40.

[0149] The elastic properties of foam can effectively absorb the vibration energy generated during the operation of the battery device, weaken the impact and vibration transmitted from the housing 10 to the control box 40, reduce the possibility of problems such as solder joint detachment and structural loosening of precision electronic components in the control box 40 due to long-term vibration, and extend the service life of the control box 40.

[0150] The foam forms elastic support in the gaps, and its own pre-tightening force can squeeze the control box 40 from the side. Combined with the connection structure between the control box 40 and the high-voltage box 30, it can achieve bidirectional fixation and further improve the stability of the overall structure.

[0151] The foam has a certain thermal insulation property, which can reduce the impact of external ambient temperature changes on the control box 40. At the same time, it prevents the heat generated by the battery cells 20 during operation from being directly conducted to the control box 40, ensuring that the electronic components operate at a suitable temperature. In addition, the foam can also absorb noise generated by vibration, reducing the operating noise of the battery device.

[0152] This application provides an electrical device, which includes a battery device 100 as described in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0153] This application provides an energy storage device, which includes a battery device 100 as described in any of the above embodiments. The battery device 100 is used to store electrical energy.

[0154] This application provides a battery device 100, which includes a housing 10, battery cells 20, a high-voltage box 30, and a control box 40. The housing 10 has a mounting cavity 101, and the battery cells 20, high-voltage box 30, and control box 40 are all located in the mounting cavity 101. The battery cells 20 and high-voltage box 30 are arranged at intervals, and the control box 40 is electrically connected to the battery cells 20. The high-voltage box 30 includes a first housing and a cover plate 31, with the cover plate 31 covering the opening side of the first housing. The control box 40 includes a second housing 41 and a bottom plate 42, with the bottom plate 42 covering the opening side of the second housing 41. The bottom plate 42 is detachably connected to the cover plate 31.

[0155] One of the cover plate 31 and the base plate 42 has a gourd-shaped hole 311, which includes a first through hole 3111 and a second through hole 3112. The first through hole 3111 communicates with the second through hole 3112. The diameter D1 of the first through hole 3111 is smaller than the diameter D2 of the second through hole 3112. The other of the cover plate 31 and the base plate 42 includes a plate body 421 and a connecting protrusion 422. The connecting protrusion 422 is connected to the side surface of the plate body 421 facing the cover plate 31. The connecting protrusion 422 includes a first protrusion 4221 and a second protrusion 4222. The first protrusion 4221 is connected to the side surface of the plate body 421 facing the cover plate 31, and the second protrusion 4222 is connected to the side surface of the first protrusion 4221 away from the plate body 421. Along the first direction X, the orthographic projection of the first protrusion 4221 on the projection surface is located within the orthographic projection of the second protrusion 4222 on the projection surface, the orthographic projection of the second protrusion 4222 on the projection surface is located within the orthographic projection of the second through hole 3112 on the projection surface, the orthographic projection of the first through hole 3111 on the projection surface is located within the orthographic projection of the second protrusion 4222 on the projection surface, and the orthographic projection of the first protrusion 4221 on the projection surface is located within the orthographic projection of the first through hole 3111 on the projection surface. The first direction X is the arrangement direction of the first protrusion 4221 and the second protrusion 4222. The projection surface is perpendicular to the first direction X. The second protrusion 4222 and the plate 421 are located on opposite sides of the cover plate 31. The cover plate 31 also has a cantilever hole 312, which is located on the same side as the first through hole 3111 and the second through hole 3112. One end of the cantilever hole 312 communicates with the second through hole 3112, and the other end of the cantilever hole 312 faces the first through hole 3111, with the cantilever hole 312 spaced apart from the first through hole 3111. The cantilever hole 312 is elongated and extends along the arrangement direction of the first through hole 3111 and the second through hole 3112. Along the first direction X, the thickness of the first protrusion 4221 is greater than or equal to the thickness of the cover plate 31. The difference between the thickness of the first protrusion 4221 and the thickness of the cover plate 31 is less than or equal to 0.5 mm. The cover plate 31 has multiple gourd-shaped holes 311, and the base plate 42 has multiple connecting protrusions 422 corresponding one-to-one with the multiple gourd-shaped holes 311. The first through hole 3111 of the gourd-shaped holes 311 is located on the same side as the second through hole 3112. The diameter of the second through hole 3112 is greater than or equal to 8 mm and less than or equal to 15 mm. The diameter of the first through hole 3111 is greater than or equal to 1 mm and less than or equal to 5 mm. The first protrusion 4221 is a cylindrical protrusion, the height direction of the first protrusion 4221 is parallel to the first direction, and the bottom diameter of the first protrusion 4221 is greater than or equal to 1 mm and less than or equal to 3 mm. The second protrusion 4222 is a cylindrical protrusion, the height direction of the second protrusion 4222 is parallel to the first direction X, and the bottom diameter of the second protrusion 4222 is greater than or equal to 4 mm and less than or equal to 10 mm. The side surface of the cover plate 31 facing the base plate 42 has a limiting structure 32, which abuts against the base plate 42.The cover plate 31 has a limiting hole 314, which forms an elastic arm 315 on the cover plate 31. The elastic arm 315 is a limiting structure, and the surface of the elastic arm 315 facing the base plate 42 has a limiting protrusion 316, which abuts against the base plate 42. The thickness D7 of the limiting protrusion 316 is greater than or equal to 0.1 mm and less than or equal to 0.8 mm. The cover plate 31 has multiple limiting structures 32, and one base plate 42 abuts against at least two limiting structures 32. The battery device 100 also includes foam, which is located in the mounting cavity 101 between the inner wall of the housing 10 and the control box 40.

[0156] 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 in that, The battery device includes: The enclosure has a mounting cavity; The battery cell is located in the mounting cavity; A high-voltage box is located in the mounting cavity, and the battery cells are arranged at intervals with the high-voltage box. The high-voltage box includes a first box body and a cover plate, and the cover plate covers the opening side of the first box body. A control box is located in the mounting cavity. The control box is electrically connected to the battery cell. The control box includes a second box body and a base plate. The base plate covers the opening side of the second box body and is connected to the cover plate.

2. The battery device according to claim 1, characterized in that, One of the cover plate and the base plate has a gourd-shaped hole, the gourd-shaped hole including a first through hole and a second through hole, the first through hole communicating with the second through hole, the diameter of the first through hole being smaller than the diameter of the second through hole, the other of the cover plate and the base plate including a plate body and a connecting protrusion, the connecting protrusion including: The first protrusion is connected to the side surface of the plate facing the cover plate; The second protrusion is connected to the surface of the first protrusion away from the plate body; Along the first direction, the orthographic projection of the first protrusion on the projection surface is located within the orthographic projection of the second protrusion on the projection surface, the orthographic projection of the second protrusion on the projection surface is located within the orthographic projection of the second through hole on the projection surface, the orthographic projection of the first through hole on the projection surface is located within the orthographic projection of the second protrusion on the projection surface, and the orthographic projection of the first protrusion on the projection surface is located within the orthographic projection of the first through hole on the projection surface. The first direction is the arrangement direction of the first protrusion and the second protrusion. The projection surface is perpendicular to the first direction. The second protrusion and the plate are located on opposite sides of the cover plate.

3. The battery device according to claim 2, characterized in that, The cover plate also has a cantilever hole located on the same side of the first through hole and the second through hole. One end of the cantilever hole is connected to the second through hole, and the other end of the cantilever hole faces the first through hole, and the cantilever hole is spaced apart from the first through hole.

4. The battery device according to claim 3, characterized in that, The cantilever hole is elongated and extends along the arrangement direction of the first through hole and the second through hole.

5. The battery device according to claim 2, characterized in that, Along the first direction, the thickness of the first protrusion is greater than or equal to the thickness of the cover plate.

6. The battery device according to claim 5, characterized in that, The difference between the thickness of the first protrusion and the thickness of the cover plate is less than or equal to 0.5 mm.

7. The battery device according to claim 2, characterized in that, The cover plate has a plurality of gourd-shaped holes, and the bottom plate has a plurality of connecting protrusions corresponding one-to-one with the plurality of gourd-shaped holes. The first through hole of the gourd-shaped hole is located on the same side as the second through hole.

8. The battery device according to claim 2, characterized in that, The diameter of the second through hole is greater than or equal to 8 mm and less than or equal to 15 mm.

9. The battery device according to claim 2, characterized in that, The diameter of the first through hole is greater than or equal to 1 mm and less than or equal to 5 mm.

10. The battery device according to claim 2, characterized in that, The first protrusion is a cylindrical protrusion, the height direction of the first protrusion is parallel to the first direction, and the bottom diameter of the first protrusion is greater than or equal to 1 mm and less than or equal to 3 mm.

11. The battery device according to any one of claims 2 to 10, characterized in that, The cover plate has a limiting structure on the side surface facing the base plate, and the limiting structure abuts against the base plate.

12. The battery device according to claim 11, characterized in that, The cover plate has a limiting hole, which forms an elastic arm on the cover plate. The elastic arm is the limiting structure. The side surface of the elastic arm facing the base plate has a limiting protrusion, which abuts against the base plate.

13. The battery device according to claim 12, characterized in that, The thickness of the limiting protrusion is greater than or equal to 0.1 mm and less than or equal to 0.8 mm.

14. The battery device according to claim 11, characterized in that, The cover plate has multiple limiting structures, and one of the base plates abuts against at least two of the limiting structures.

15. The battery device according to any one of claims 1 to 10, characterized in that, The battery device also includes: Foam is located in the mounting cavity, between the inner wall of the housing and the control box.

16. An electrical appliance, characterized in that, The electrical device includes a battery device as described in any one of claims 1 to 15, the battery device being used to provide electrical energy.

17. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1 to 15, the battery device being used to store electrical energy.

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