Battery device and electric device

Abstract

The invention provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device is used for the power utilization device, and the power utilization device comprises a mounting frame. The battery device comprises a box body, a single battery and a bottom protection plate, the box body is provided with a containing cavity, the single battery is located in the containing cavity, the bottom protection plate is located on one side of the box body and comprises a main plate and a mounting plate, a mounting groove is formed in the surface of the main plate, the mounting plate covers an opening of the mounting groove, the mounting plate is connected with the main plate, and the main plate is connected with the box body. The mounting plate is connected with the mounting frame. When the power utilization device faces complex working conditions such as high-frequency vibration and long-time high-load operation, the installation plate is connected with the installation frame, the installation frame can be fixed, and displacement between the installation frame and the battery device or displacement at the connection position of the structure of the installation frame is prevented. The possibility of collision or friction caused by relative movement of components is reduced, and the possibility of abnormal sound is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and in particular to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of society. Rechargeable batteries have the characteristics of storing energy or releasing energy as needed, and are widely used in various power utilization devices or energy storage systems. They are an important part of promoting energy transformation and sustainable development. For the new energy industry, battery technology is an important factor for its development.

[0003] The battery device is used in a power utilization device to provide energy for the power utilization device. The power utilization device is provided with a mounting rack, which can be used to fix or support other components in the power utilization device. In the related art, the mounting rack is not firm enough and is prone to abnormal noise during use of the power utilization device. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device and a power utilization device to improve the abnormal noise problem of the mounting rack.

[0005] Embodiments of the first aspect of the present application provide a battery device, which is used in a power utilization device. The power utilization device includes a mounting rack. The battery device includes: a box body having a receiving cavity; a battery cell located in the receiving cavity; a bottom guard plate located on one side of the box body. The bottom guard plate includes a main plate and a mounting plate. The surface of the main plate has a mounting groove. The mounting plate covers the opening of the mounting groove. The mounting plate is connected with the main plate. The main plate is connected with the box body. The mounting plate is connected with the mounting rack.

[0006] In the technical solution of the embodiments of the present application, when the power utilization device faces complex working conditions such as high-frequency vibration and long-time high-load operation, the mounting plate is connected with the mounting rack, which can fix the mounting rack and prevent displacement between the mounting rack and the battery device or at the structure connection of the mounting rack itself. The possibility of collision or friction caused by the relative movement of components is reduced, and the possibility of abnormal noise is reduced.

[0007] In some embodiments, the main plate and the mounting plate are integrally formed. Integrally forming the main plate and the mounting plate eliminates the connection interface between them, making the bottom guard plate a complete rigid whole, and maximizing the mechanical properties of the material. When the power utilization device faces complex working conditions such as high-frequency vibration, bumping impact or long-time high-load operation, the integrally formed main plate and mounting plate can synchronously bear the load, avoiding problems such as loosening of the spliced part, cracking of the welding point, etc. leading to the mounting plate falling off or deforming, and providing reliable bottom protection for the battery device.

[0008] In some embodiments, the main plate is welded with the mounting plate. The tensile strength and shear strength of the welding are closer to the base material itself, and can withstand the weight load of the battery device and the vibration and impact load during operation of the electric device. In high-frequency vibration or long-time high-load working conditions, the welding structure is less likely to have connection failure problems, and the mounting plate and the main plate can maintain stable connection to ensure the protection of the bottom guard plate on the bottom of the battery device and provide structural support for the stable operation of the electric device.

[0009] In some embodiments, the main plate has a plurality of mounting grooves, and the bottom guard plate includes a plurality of mounting plates corresponding to the plurality of mounting grooves. Compared with the design of a single mounting groove and a mounting plate, the multiple sets of corresponding structures can evenly disperse the weight and vibration load of the battery device during operation to multiple stress points of the bottom guard plate, avoiding deformation or welding seam cracking of a single mounting plate due to excessive stress. Especially when the electric device is running in high-frequency vibration or jolt, the synchronous connection of multiple sets of mounting plates and mounting racks can form a multi-point support structure to resist lateral or longitudinal impact force, prevent the overall shift or tilt of the bottom guard plate, further ensure the stable state of the battery device in the electric device, and reduce the risk of structural failure caused by local overload.

[0010] In some embodiments, the main plate has a plurality of mounting grooves, and the bottom guard plate includes a mounting plate covering the openings of the plurality of mounting grooves. The single mounting plate covers all the mounting grooves, forming a stable structure of integrated multi-support for the bottom guard plate, which avoids structural deviation caused by uneven stress on each mounting plate compared with the design of multiple independent mounting plates. During high-frequency vibration and long-time high-load operation of the electric device, the integrated mounting plate can evenly transmit the load to each mounting groove and the main plate, effectively dispersing local stress and preventing deformation of the single groove area due to overload; at the same time, the integrity of the mounting plate makes it more resistant to bending and stretching, effectively resisting fatigue damage caused by vibration and impact, and providing more reliable bottom protection for the battery device.

[0011] In some embodiments, the maximum distance between the side surface of the mounting plate facing the mounting groove and the bottom surface of the mounting groove is greater than or equal to 6 mm and less than or equal to 10 mm. The maximum distance in the above range can accommodate the connecting end of the rivet, avoid extrusion and interference between the connecting component and the bottom surface of the mounting groove, and ensure that the rivet can be completely inserted into the hole of the mounting plate and the mounting rack to achieve stable fastening. The distance reserves space for assembly operations, facilitating workers to use tools for rivet installation, disassembly or maintenance, avoiding operation obstruction caused by too narrow space, and improving assembly efficiency and post-operation maintenance convenience.

[0012] In some embodiments, the main plate has a plurality of mounting grooves arranged along the edges of the main plate. The plurality of mounting grooves are distributed at intervals, which can evenly distribute the total load to the plurality of stress points of the bottom guard plate, avoid local stress overload caused by concentrated stress of a single mounting plate, especially in high-frequency vibration and high-load working conditions, which can improve the overall fatigue resistance of the bottom guard plate and prolong the service life.

[0013] In some embodiments, the outer surface of the mounting plate has a first coating. The first coating can isolate air, moisture, oil stains, and external corrosive media from contacting the mounting plate substrate, avoiding rust, oxidation, and other problems of the mounting plate. The first coating can protect the connection part of the mounting plate and the mounting rack, prevent corrosion from causing hole deformation and loose connection, ensure that the mounting plate can still maintain a stable assembly state after long-term use, and reduce the frequency of maintenance and replacement.

[0014] In some embodiments, the first coating includes at least one of a polytetrafluoroethylene layer and a polyvinylidene fluoride layer. Both the polytetrafluoroethylene layer and the polyvinylidene fluoride layer have strong chemical inertness, which can resist the corrosion of various corrosive media such as acid, alkali, salt, oil stain, and moisture, avoid rust and corrosion of the mounting plate substrate and rivet connection part, and prolong the service life of the mounting plate.

[0015] In some embodiments, the outer surface of the main plate has a second coating. The second coating can isolate air, moisture, oil stains, and external corrosive media from contacting the main plate substrate, avoiding rust, oxidation, and other problems of the main plate.

[0016] In some embodiments, the second coating includes a polyvinyl chloride layer. The polyvinyl chloride layer has strong chemical stability, which can resist the corrosion of air, moisture, rainwater, ordinary acid and alkali, and industrial oil stains, and avoid rust and oxidation of the main plate substrate. The polyvinyl chloride layer forms a dense protective film, which can block moisture from penetrating into the connection gap between the main plate and the mounting plate, prevent the strength of the connection parts such as welds and bolts from being reduced due to moisture corrosion, and prolong the overall service life of the bottom guard plate. The polyvinyl chloride layer is a good insulating layer, which can effectively isolate the current conduction between the main plate and the surrounding metal parts, and avoid the risk of electrochemical corrosion or electric leakage caused by metal contact.

[0017] In some embodiments, the bottom guard plate has a reinforcing rib. The reinforcing rib protrudes from the surface of the bottom guard plate, forming a protective protrusion. When the bottom guard plate is subjected to bottom collision or scratching, the reinforcing rib can preferentially bear the impact, reducing the impact force directly acting on the main body of the bottom guard plate and the internal battery monomers.

[0018] Embodiments of the second aspect of the application provide a power-using device, which includes the battery device of any one of the above embodiments, and the battery device is used to provide electric energy. The mounting plate of the battery device is connected with the mounting rack of the power-using device.

[0019] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the present application can be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] In the drawings, like reference numerals refer to same or similar functionalities throughout the several views. The drawings are not necessarily to scale. It is to be understood that the drawings only depict several embodiments in accordance with the present disclosure and should not be considered as limiting the scope of the present application.

[0021] Figure 1 A structural schematic diagram of a vehicle provided for some embodiments of the present application; Figure 2 A disassembled structural schematic diagram of a battery provided for some embodiments of the present application; Figure 3 A bottom view of a bottom guard provided for an embodiment of the present application; Figure 4 A Figure 3 A sectional view along A-A.

[0022] BRIEF DESCRIPTION OF DRAWINGS 1000, an electric device; 100, a battery device; 200, a controller; 300, a motor; 10, a box body; 11, a first part; 12, a second part; 101, a containing cavity; 20, a battery cell; 30, a bottom guard; 301, a mounting plate; 302, a main plate; 321, a mounting groove; 304, a reinforcing rib. DETAILED DESCRIPTION

[0023] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0024] 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 the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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).

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In the energy supply systems of various electrical devices, battery devices provide power support for the normal operation of the devices. To ensure the orderliness of the internal structure and the stability of the components of the electrical device, a mounting frame is usually installed inside the device. As a key support and fixing component, the mounting frame can position and support the motor, circuit board, sensor and other functional components inside the electrical device according to the assembly requirements of different components, thereby avoiding the displacement or interference of components during the operation of the electrical device.

[0033] In some technical solutions, the ends of the mounting brackets are not securely fixed, resulting in poor overall stability. This makes it easy for collisions or friction to occur between the mounting bracket and the fixed components, or at the structural connections of the mounting bracket itself, during actual use, especially under conditions of high-frequency vibration and prolonged high-load operation. This can lead to abnormal noises. Such noises not only affect the user experience, but long-term accumulation may also accelerate the wear and tear on the mounting bracket and components, and even cause loose connections, potentially impacting the operational stability and lifespan of the electrical equipment.

[0034] The embodiments of this application provide a battery device that reduces the possibility of collisions or friction caused by relative movement of components, and reduces the possibility of abnormal noises.

[0035] 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.

[0036] 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.

[0037] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device 1000 according to an embodiment of this application.

[0038] 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 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 installed inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0039] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0040] 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 receiving 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, and the first portion 11 and the second portion 12 together define the receiving cavity 101 for accommodating the battery cell 20. The second part 12 can be a hollow structure with one open end, and the first part 11 can be a plate-like structure. The first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 together define the receiving cavity 101. Alternatively, the first part 11 and the second part 12 can both be hollow structures with one open end, and the open side of the first part 11 covers the open side of the second part 12. The first part 11 can be a hollow structure with openings on both sides, and the second part 12 can be a plate-like structure. The second part 12 covers the one open end of the first part 11 so that the first part 11 and the second part 12 together define the receiving cavity 101. Of course, the box 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0041] 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.

[0042] 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.

[0043] This application provides a battery device 100 for use with an electrical device 1000, which includes a mounting bracket. The battery device 100 also includes a bottom protective plate 30, which is located on one side of a housing 10 and connected to the housing 10. Figure 3 This is a bottom view of a bottom guard plate provided in an embodiment of this application. Figure 4 for Figure 3 Cross-sectional view of plane AA. See also Figure 3 and Figure 4 The bottom cover plate 30 includes a main board 302 and a mounting plate 301. The surface of the main board 302 has a mounting groove 321. The mounting plate 301 is connected to the main board 302, covers the opening of the mounting groove 321, and is connected to the mounting bracket. The main board 302 is connected to the housing 10.

[0044] The battery device 100 is the power supply component for the electrical device 1000, providing electrical energy support for the operation of the electrical device 1000. The electrical device 1000 is equipped with a mounting bracket, which can realize the positioning and support of the motor, circuit board, sensor and other functional components inside the electrical device 1000.

[0045] The size and shape of the receiving cavity 101 are adapted to the outer contour of the battery cell 20, which can wrap and protect the battery cell 20, effectively isolate the battery cell 20 from the influence of external dust, moisture and mechanical impact, and at the same time provide a stable installation space for the battery cell 20 to ensure its installation accuracy inside the housing 10.

[0046] The bottom protective plate 30 is assembled on one side of the bottom of the box 10. It can be firmly assembled with the box 10 through reliable connection methods such as bolt connection and buckle fixation. It can provide additional protection for the bottom of the box 10 and the battery cells 20 inside, and reduce the damage to the core components caused by bottom collision and friction.

[0047] In the embodiments of this application, the battery device 100 can be connected to the power-consuming device 1000. For example, the battery device 100 includes a mounting beam that is connected to the base plate of the power-consuming device 1000; or the housing 10 is connected to the base plate of the power-consuming device 1000.

[0048] To facilitate the installation of the battery device 100 and the mounting bracket, a mounting plate 301 is provided on the bottom cover plate 30. The mounting plate 301 has a connecting structure that enables connection with the mounting bracket.

[0049] When the electrical device 1000 faces complex operating conditions such as high-frequency vibration and long-term high-load operation, the mounting plate 301 connects to the mounting bracket to fix the mounting bracket and prevent displacement between the mounting bracket and the battery device 100 or at the connection points of the mounting bracket itself. This reduces the possibility of collisions or friction caused by relative movement of components and reduces the possibility of abnormal noise.

[0050] Because the connection between the mounting plate 301 and the mounting bracket reduces collision and friction between components, it reduces wear on the mounting bracket and related components of the battery device 100, preventing performance degradation or structural damage due to long-term wear. Simultaneously, the stable connection prevents loosening of component connections due to vibration and other factors, ensuring that all core components of the electrical device 1000 are in a stable assembly state. This comprehensively guarantees the operational stability of the electrical device 1000, reduces the frequency of maintenance due to component failures, extends the overall service life of the electrical device 1000, and lowers user operating and maintenance costs.

[0051] The mounting plate 301 is connected to the mounting bracket, which can strengthen the connection between the battery device 100 and the power consumption device 1000, and provide solid structural support for the subsequent operation of the battery device 100.

[0052] According to some embodiments of this application, the mounting plate 301 is detachably connected to the mounting bracket.

[0053] Mounting plate 301 and mounting bracket can be assembled and disassembled through mechanical connection methods such as bolt connection, snap-fit ​​connection or pin connection.

[0054] For example, the threaded holes of the mounting plate 301 are aligned with the through holes at the corresponding positions of the mounting bracket. Bolts of appropriate specifications are inserted into the through holes and screwed into the threaded holes in sequence, and the connection is ensured by controlling the tightening torque of the bolts.

[0055] For example, the mounting plate 301 is provided with a protruding structure with elastic claws, and the mounting bracket has a corresponding slot. During assembly, the claws are aligned with the slots and pressed to make the claws elastically deform and embed into the slots for fixation. During disassembly, the claws can be gently pushed with a tool to release the elastic stress and separate.

[0056] For example, in a pin connection, a cylindrical pin or a flexible pin is inserted into a pin hole aligned with the mounting plate 301 and the mounting bracket. The pin body and the pin hole are used to achieve positioning and fixation. When disassembling, the pin can be removed by a pin puller to complete the separation.

[0057] During the long-term operation of the electrical device 1000, if the battery device 100 malfunctions and requires repair or replacement, or if the mounting bracket needs maintenance due to wear, the detachable connection allows for removal of the battery device 100 from the mounting bracket without damaging the mounting plate 301 or the main structure of the mounting bracket. Workers can remove the battery device 100 from the mounting bracket using only standard tools. This avoids the risk of component damage caused by forced disassembly, shortens maintenance and repair time, reduces unnecessary component replacement costs, lowers the skill requirements for workers, and improves on-site work efficiency.

[0058] If the installation position of the battery device 100 needs to be adjusted according to the actual application scenario, the detachable connection allows the operator to disassemble the connection between the mounting plate 301 and the mounting frame, adjust the fixed position of the battery device 100, and reassemble it without the need for secondary processing of the mounting frame or mounting plate 301. On the other hand, when the power device 1000 is upgraded and a different specification of battery device 100 needs to be replaced, as long as the size of the mounting plate of the new battery device is compatible with the original mounting frame, it can be directly replaced through the detachable connection without the need to replace the entire mounting frame, reducing the cost and difficulty of equipment upgrades and improving the structural compatibility and life cycle value of the entire power device.

[0059] When the electrical device 1000 exhibits abnormal noises or vibrations, workers can disassemble the connection between the mounting plate 301 and the mounting frame to separate the battery device 100 from the mounting frame, inspect the structural condition of both separately, and locate the source of the fault. If a problem is confirmed in a specific component, the faulty component can be replaced individually without scrapping the entire battery device 100 or the mounting frame. This reduces resource waste, ensures that the equipment can resume stable operation after repair, avoids prolonged downtime due to difficulties in troubleshooting, and guarantees the continuous operation capability of the electrical device 1000.

[0060] The motherboard 302 and the mounting plate 301 can be reliably connected by welding, bolting, or integral molding.

[0061] The main board 302 serves as the main load-bearing structure of the bottom protective plate 30. The main board 302 can be made of high-strength metal sheet (such as steel plate or aluminum alloy plate) through a stamping process. Its surface has a pre-set mounting groove 321 according to installation requirements. The mounting groove 321 is a recessed structure, and the depth, width, and internal contour of the groove are set according to requirements. The mounting groove 321 can provide space for the subsequent connection components (such as rivets) between the mounting plate 301 and the mounting bracket.

[0062] The mounting plate 301 can be made of the same material as the motherboard 302 to ensure that the two can withstand the same load and stress after being connected.

[0063] The mounting groove 321 of the motherboard 302 provides space for the rivets. The rivet connection forms a fastening structure through plastic deformation, which is not easy to loosen. Even under high-frequency vibration and long-term high-load conditions, the connection stability between the mounting plate 301 and the mounting bracket can be maintained, and the battery device 100 can be displaced due to loose connection.

[0064] The mounting plate 301 completely covers the opening of the mounting groove 321, effectively sealing the internal space of the groove and preventing external dust, moisture, oil, and other impurities from entering. This avoids the accumulation of impurities that could cause corrosion at the connection between the mounting plate 301 and the main board 302, or affect the connection strength of the rivets. Simultaneously, the mounting groove 321 conceals the connection points of the rivets within the groove, preventing deformation or breakage of the rivets due to collisions or scratches from external objects during handling, installation, or use of the bottom protective plate 30, further ensuring the integrity of the connection structure.

[0065] Rivet connections do not require pre-processing of threads; fastening can be achieved simply with a rivet gun. The installation process is simple, and it can significantly improve the overall assembly efficiency of the electrical device 1000, especially in mass production scenarios. On the other hand, if disassembly and maintenance are required later, workers can remove the rivets using a rivet gun or a special rivet removal tool. The disassembly process will not damage the mounting plate 301, main board 302, or the main structure of the mounting bracket, facilitating the reuse or individual replacement of components and reducing maintenance difficulty and cost.

[0066] According to some embodiments of this application, the motherboard 302 and the mounting plate 301 are integrally formed.

[0067] For example, the motherboard 302 and the mounting plate 301 can be manufactured by extrusion molding; or the motherboard 302 and the mounting plate 301 can be manufactured by 3D printing.

[0068] The integral molding of the main board 302 and the mounting plate 301 eliminates the connection interface between them, making the bottom cover 30 a complete rigid unit, maximizing the mechanical properties of the material. When the electrical device 1000 is subjected to high-frequency vibration, bumps, or long-term high-load operation, the integrally molded main board 302 and mounting plate 301 can withstand the load synchronously, preventing the mounting plate 301 from falling off or deforming due to loosening at the joints or cracking at the welds, thus providing reliable bottom protection for the battery device 100.

[0069] The one-piece molded structure has no splicing gaps, and the connection between the mounting plate 301 and the main board 302 is completely sealed, which can form a closed space for the mounting groove 321 to prevent external impurities from entering. At the same time, the one-piece molded mounting plate 301 covers the opening of the mounting groove 321 more tightly, avoiding gaps at the opening due to splicing misalignment, further improving the dustproof and waterproof performance of the bottom guard plate 30, extending the service life of the internal structure and rivet connection, and reducing the risk of failure caused by impurity corrosion.

[0070] The one-piece molding design eliminates the need for separate processing and positioning alignment of the motherboard 302 and mounting plate 301 in the split structure. The basic structure processing of the bottom guard plate 30 can be completed in one molding process, which shortens the production cycle and reduces the complexity of the production line and labor costs.

[0071] According to some embodiments of this application, the motherboard 302 is soldered to the mounting plate 301.

[0072] Before soldering, the parts of the motherboard 302 and the mounting plate 301 to be soldered need to be pre-treated: the oxide layer, oil and impurities on the surface are removed by grinding to ensure the cleanliness of the soldering surface; at the same time, according to the size of the mounting groove 321, the mounting plate 301 is positioned at the groove opening of the motherboard 302, and the positions of the two are fixed by the positioning fixture to ensure that the mounting plate 301 can completely cover the opening and avoid subsequent assembly deviations.

[0073] The tensile and shear strengths of the welded structure are closer to those of the base material, enabling it to withstand the weight load of the battery device 100 and the vibration and impact loads during the operation of the electrical device 1000. Under high-frequency vibration or long-term high-load conditions, the welded structure is less prone to connection failure, and the mounting plate 301 and the main board 302 can maintain a stable connection, ensuring the bottom protection plate 30 protects the bottom of the battery device 100 and provides structural support for the stable operation of the electrical device.

[0074] The continuous weld formed by welding can seal the connection gap between the main board 302 and the mounting plate 301, reducing the possibility of dust leakage and water seepage in the gap, thereby protecting the rivet connection structure in the mounting groove 321 from corrosion, and preventing the accumulation of impurities from affecting the connection accuracy between the mounting plate 301 and the mounting bracket.

[0075] According to some embodiments of this application, see Figure 3 The motherboard 302 has multiple mounting grooves 321, and the bottom cover plate 30 includes multiple mounting plates 301 corresponding to the multiple mounting grooves 321.

[0076] In the embodiments of this application, the number of mounting grooves 321 can be determined according to the size and shape of the motherboard 302. For example, the number of mounting grooves 321 is greater than or equal to 2 and less than or equal to 30. Multiple mounting grooves 321 are symmetrically or equidistantly distributed on the motherboard 302. For instance, if the motherboard 302 has a rectangular structure, the mounting grooves 321 can be respectively located at the four corners and the midpoints of each side of the motherboard 302, so that each mounting plate 301 can evenly distribute the load.

[0077] The bottom protective plate 30 is equipped with multiple mounting plates 301, which correspond one-to-one with the mounting grooves 321. The outer dimensions and thickness of each mounting plate 301 are adapted to the groove of the corresponding mounting groove 321 to ensure that it can tightly cover the groove after installation without any obvious gaps. At the same time, each mounting plate 301 is pre-set with rivet holes for connection with the mounting frame, and the position and diameter of the rivet holes of all mounting plates 301 are strictly consistent to ensure that each mounting plate 301 can be subjected to force synchronously when docking with the mounting frame, and to avoid local stress concentration due to hole position deviation.

[0078] In the embodiments of this application, the joint between each mounting groove 321 and the mounting plate 301 can be coated with sealant or treated with rust prevention to further improve local sealing and corrosion resistance.

[0079] Compared to a single mounting groove 321 and mounting plate 301 design, multiple corresponding structures can evenly distribute the weight of the battery device 100 and the vibration load during operation onto multiple stress points of the bottom cover plate 30, preventing deformation or weld cracking of a single mounting plate 301 due to excessive stress. Especially when the electrical device 1000 is operating under high-frequency vibration or bumps, the synchronous connection of multiple mounting plates 301 and the mounting frame can form a multi-point support structure to resist lateral or longitudinal impact forces, prevent the bottom cover plate 30 from shifting or tilting as a whole, further ensure the stability of the battery device 100 within the electrical device 1000, and reduce the risk of structural failure caused by local overload.

[0080] The design of multiple mounting grooves 321 and mounting plates 301 forms a redundant connection mechanism. Even if one mounting plate 301 experiences a loosening of rivets or localized wear due to an accidental collision, the remaining mounting plates 301 can still bear the load normally, preventing the connection between the entire bottom cover plate 30 and the mounting frame from failing and significantly improving the safety of the electrical equipment operation. For example, if one of the 16 mounting plates 301 fails, the remaining 15 mounting plates 301 can redistribute the load to temporarily support the weight of the battery device 100, buying time for maintenance and preventing the battery device 100 from falling off or the electrical equipment 1000 from shutting down due to a single point of failure.

[0081] Because multiple mounting plates 301 correspond one-to-one with mounting grooves 321 and are assembled independently, when a mounting plate 301 experiences wear, stripped rivets, or weld corrosion, the operator does not need to disassemble the entire bottom cover plate 30. They only need to replace or repair the faulty mounting plate 301 individually, without affecting the connection status of other normal mounting plates 301. This shortens maintenance time, reduces unnecessary component replacements, and lowers maintenance costs and operational complexity.

[0082] The design of multiple mounting grooves 321 and mounting plates 301 can flexibly adapt to the connection requirements of different mounting brackets: if the mounting hole distribution of the mounting bracket is adjusted, only the rivet hole position on the corresponding mounting plate 301 needs to be adjusted, without redesigning the entire main board 302 structure; if the power device 1000 needs to increase the number of battery devices 100, a corresponding number of mounting grooves 321 and mounting plates 301 can be added to the main board 302, without replacing the entire bottom cover plate 30, reducing the complexity of product design and production, and improving overall versatility.

[0083] According to some embodiments of this application, the motherboard 302 has a plurality of mounting recesses 321, and the bottom cover plate 30 includes a mounting plate 301, which covers the openings of the plurality of mounting recesses 321.

[0084] The motherboard 302 can be made of metal sheet through precision stamping process. Multiple mounting grooves 321 are reasonably arranged on its surface according to the load distribution of the battery device 100 and the connection point requirements of the mounting bracket.

[0085] For example, the edges of each mounting groove 321 can be chamfered, which facilitates the positioning and fitting of the mounting plate 301, avoids stress concentration caused by sharp angles, and improves the structural durability of the motherboard 302.

[0086] The bottom protective plate 30 is equipped with an integrated molding mounting plate 301. The size of the mounting plate 301 completely covers the groove area of ​​all mounting recesses 321, and the thickness of the mounting plate 301 is optimized according to the total load requirements. The lower surface of the mounting plate 301 is adapted to the edge of the groove of each mounting recess 321. During assembly, the mounting plate 301 is precisely pressed onto the surface of the main plate 302 by a positioning fixture, ensuring that the mounting plate 301 can cover the opening of all mounting recesses 321 without misalignment or gaps.

[0087] In terms of connection method, the mounting plate 301 and the main board 302 are fixed by welding or bolt fastening. Each area of ​​the mounting plate 301 corresponding to the mounting groove 321 is pre-set with rivet holes for connection with the mounting bracket. The hole positions correspond one-to-one with the mounting points of the mounting bracket to ensure the accuracy of subsequent connection.

[0088] A single mounting plate 301 covers all mounting grooves 321, forming a stable, integrated multi-support structure for the bottom cover plate 30. Compared to the design of multiple independent mounting plates, this avoids structural displacement caused by uneven stress on each mounting plate. During high-frequency vibration and long-term high-load operation of the electrical device 1000, the integrated mounting plate 301 can evenly distribute the load to each mounting groove 321 and the main board 302, effectively dispersing local stress and preventing overload deformation in a single groove area. At the same time, the integrity of the mounting plate 301 makes it more resistant to bending and tensile stress, effectively resisting fatigue damage caused by vibration and impact, and providing more reliable bottom protection for the battery device 100.

[0089] The single mounting plate 301 fits snugly against the openings of multiple mounting grooves 321, with only one connecting seam or multiple bolt connection surfaces at the edge of the mounting plate 301 and the main board 302. Compared to the multiple seams caused by multiple independent mounting plates, the sealing path is significantly shortened. The openings of the mounting grooves 321 can be sealed by continuous welds or sealant filling after bolting, effectively preventing dust, moisture, oil, and other impurities from entering the grooves. This avoids corrosion of the rivet connection structure or blockage of the holes, significantly extending the service life of the bottom guard plate 30 and related components, and reducing the risk of failure due to corrosion.

[0090] A single mounting plate 301 does not require individual alignment with multiple mounting recesses 321 during assembly; a single positioning is sufficient to cover and secure all mounting recesses 321, reducing assembly time and the risk of positioning deviations. The single mounting plate design reduces the number of mounting plates 301 to be processed and the investment in molds. Compared to multiple independent mounting plates, there is no need to design and process a separate mounting plate 301 for each mounting recess 321, reducing component production, warehousing, and management costs. All rivet holes on a single mounting plate 301 can be machined in one operation, resulting in higher hole accuracy and spacing consistency. This ensures precise alignment with the mounting points of the mounting bracket, avoiding hole misalignment problems caused by processing errors in multiple independent mounting plates.

[0091] According to some embodiments of this application, see Figure 4 The maximum distance L between the side surface of the mounting plate 301 facing the mounting groove 321 and the bottom surface of the mounting groove 321 is greater than or equal to 6 mm and less than or equal to 10 mm.

[0092] For example, L equals 6 mm; or L equals 7 mm; or L equals 8 mm; or L equals 9 mm; or L equals 10 mm.

[0093] The maximum spacing L within the aforementioned range can accommodate the connecting end of the rivet, preventing the connecting parts from being squeezed or interfered with the bottom surface of the mounting groove 321, ensuring that the rivet can be fully inserted into the holes of the mounting plate 301 and the mounting bracket for a secure fastening. This spacing provides ample space for assembly operations, facilitating the use of tools by staff for rivet installation, removal, or maintenance, avoiding operational obstruction due to insufficient space, and improving assembly efficiency and ease of subsequent maintenance.

[0094] According to some embodiments of this application, see Figure 3 The motherboard 302 has multiple mounting grooves 321, which are arranged at intervals along the edge of the motherboard 302.

[0095] The mainboard 302 serves as the main load-bearing structure of the bottom cover plate 30. Its surface has multiple mounting grooves 321 evenly or as needed, depending on the weight distribution of the battery device 100, the stress requirements of the mounting bracket, and the overall structural stability of the bottom cover plate 30.

[0096] Multiple mounting grooves 321 are spaced apart, which can evenly distribute the total load to multiple stress points of the bottom guard plate 30, avoiding local stress overload caused by concentrated force on a single mounting plate 301. Especially under high-frequency vibration and high-load conditions, it can improve the overall fatigue resistance of the bottom guard plate 30 and extend its service life.

[0097] The mounting grooves 321 are arranged along the edge, which can avoid occupying the central area of ​​the motherboard 302 and reserve sufficient installation space for other components between the motherboard 302 and the enclosure 10. There is no need to compress the arrangement space of core components due to the layout of the mounting grooves 321.

[0098] The edge arrangement design makes the overall structure of the bottom cover plate 30 more compact, avoiding the increase in the size of the main board 302 caused by the inward movement of the mounting groove 321. This conforms to the design trend of lightweight and miniaturization of the battery device 100 and adapts to the internal space layout requirements of the power device 1000.

[0099] According to some embodiments of this application, the outer surface of the mounting plate 301 has a first coating.

[0100] The first coating can be applied through processes such as spraying or film application. The first coating has strong adhesion to the 301 substrate of the mounting plate and is not easy to peel off or flake.

[0101] The first coating isolates the mounting plate 301 substrate from air, moisture, oil, and external corrosive media, preventing rust and oxidation. It also protects the connection between the mounting plate 301 and the mounting bracket, preventing corrosion that could cause hole deformation or loosening, ensuring a stable assembly even after long-term use and reducing the frequency of maintenance and replacement.

[0102] The first coating itself has a certain hardness, which can enhance the wear resistance of the outer surface of the mounting plate 301 and prevent the bottom guard plate 30 from being scratched by friction or abrasion during handling, installation or use, thus protecting the structural integrity of the mounting plate 301.

[0103] According to some embodiments of this application, the first coating includes at least one of a polytetrafluoroethylene layer and a polyvinylidene fluoride layer.

[0104] The first coating includes one or both of a polytetrafluoroethylene layer and a polyvinylidene fluoride layer.

[0105] Both the polytetrafluoroethylene (PTFE) layer and the polyvinylidene fluoride (PVDF) layer have strong chemical inertness, which can resist the erosion of various corrosive media such as acids, alkalis, salts, oils, and water vapor, preventing the substrate of mounting plate 301 and the rivet connection parts from rusting and corroding, thus extending the service life of mounting plate 301.

[0106] According to some embodiments of this application, the outer surface of the motherboard 302 has a second coating.

[0107] The second coating can isolate air, moisture, oil, and external corrosive media from contact with the motherboard 302 substrate, preventing problems such as rust and oxidation from occurring on the motherboard 302.

[0108] According to some embodiments of this application, the second coating comprises a polyvinyl chloride layer.

[0109] The PVC layer boasts strong chemical stability, resisting corrosion from air, moisture, rainwater, common acids and alkalis, and industrial oils, preventing rust and oxidation of the motherboard 302 substrate. The PVC layer forms a dense protective film, preventing moisture from seeping into the connection gaps between the motherboard 302 and the mounting plate 301, thus preventing welds, bolts, and other joints from weakening due to moisture corrosion and extending the overall service life of the bottom cover. The PVC layer is also an excellent insulating layer, effectively isolating the motherboard 302 from current conduction with surrounding metal components, avoiding the risk of electrochemical corrosion or leakage due to metal-to-metal contact.

[0110] According to some embodiments of this application, the mounting plate 301 has a large thickness, and the mounting plate 301 is connected to the mounting bracket by bolts.

[0111] For example, the surface of the bottom cover 30 has a plurality of mounting plates 301, which are arranged at intervals around the edge of the bottom cover 30.

[0112] The mounting plate 301 is relatively thick, and the resulting protruding design creates a height difference between the mounting plate 301 and other surfaces of the bottom guard plate 30, reserving operating space for bolt installation and tightening, facilitating tool insertion and avoiding operational difficulties caused by space constraints.

[0113] Bolted connections allow for repeated disassembly and tightening. When it is necessary to inspect or replace parts in the future, simply loosen the bolts to separate the mounting plate 301 from the mounting bracket without damaging the bottom protective plate, thus reducing maintenance costs and time.

[0114] According to some embodiments of this application, the mounting plate 301 is bonded and / or welded to the mounting bracket.

[0115] The welded connection strength is close to that of the base material itself, effectively withstanding the weight of the battery unit (100g), operational vibration, and impact loads, making it particularly suitable for high-frequency vibration and long-term high-load conditions. The continuous weld seam formed by the weld can seal the connection gap between the mounting plate 301 and the mounting bracket, reducing the intrusion of impurities such as dust, moisture, and oil, preventing corrosion at the connection points, and extending the service life of the components. The welded structure has no additional connecting parts, reducing the number of parts, lowering assembly complexity, and avoiding the risk of loosening, ensuring long-term operational stability.

[0116] The adhesive fills the minute gaps between the mounting plate 301 and the mounting bracket, adapting to slight unevenness on both surfaces to achieve a proper fit, disperse localized stress, and avoid stress concentration caused by a rigid connection. The bonding process requires no high temperature or mechanical compression and will not damage the surface structure of the mounting plate 301 or the bracket.

[0117] According to some embodiments of this application, see Figure 3 The bottom protective plate 30 has reinforcing ribs 304.

[0118] For example, a protrusion, which is a reinforcing rib 304, can be formed on the bottom guard plate 30 by a stamping process, and the protrusion does not increase the thickness of the bottom guard plate 30.

[0119] The reinforcing rib 304 protrudes from the surface of the bottom protective plate, forming a protective protrusion. When the bottom protective plate 30 is subjected to bottom collision or scratch, the reinforcing rib 304 can withstand the impact first, reducing the impact force directly acting on the main body of the bottom protective plate 30 and the internal battery cell 20.

[0120] According to some embodiments of this application, the battery device 100 also includes a cold plate located in the receiving cavity 101, connected to the housing 10, and located between the battery cell 20 and the bottom protective plate 30.

[0121] In some embodiments of this application, the housing 10 may have a bottom wall located between the cold plate and the bottom protective plate 30.

[0122] In some other embodiments of this application, the housing 10 does not have a separate bottom wall, and the cold plate is reused as the bottom wall of the housing 10.

[0123] The cold plate can be fixed to the inner wall of the housing 10 by bolt fastening, snap-fit ​​connection or welding to ensure stable position and tight fit with the bottom of the battery cell 20.

[0124] The heat generated by the battery cell 20 during operation is transferred to the attached cold plate. Through the coolant circulation in the internal channels of the cold plate, the heat is quickly conducted to the outside of the casing, preventing heat from accumulating at the bottom of the battery cell. The cold plate is located between the battery cell 20 and the bottom protective plate 30, forming a dual protective structure: when the bottom protective plate 30 is subjected to external collisions or scratches, the cold plate can share the impact force, preventing external forces from acting directly on the battery cell and reducing the risk of deformation and damage to the battery cell casing.

[0125] An embodiment of this application provides an electrical device, which includes a battery device according to any of the above embodiments. The battery device is used to provide electrical energy, and the mounting plate of the battery device is connected to the mounting bracket of the electrical device.

[0126] For example, the mounting bracket can be used to position and support motors, circuit boards, sensors and other functional components inside the electrical device.

[0127] For example, taking an electric vehicle as an example, the mounting bracket can be the vehicle floor, the battery mounting bracket, the motor controller mounting bracket, the on-board charging device mounting bracket, the engine control unit mounting plate, the engine mount mounting bracket, the camera mounting bracket, etc.

[0128] This application provides a battery device 100 for use in an electrical device 1000, which includes a mounting bracket. The battery device 100 includes a housing 10, battery cells 20, and a bottom protective plate 30. The housing 10 has a receiving cavity 101, with the battery cells 20 located within it. The bottom protective plate 30 is located on one side of the housing 10 and includes a main board 302 and a mounting plate 301. The main board 302 has mounting grooves 321 on its surface. The mounting plate 301 is connected to the main board 302, covering the opening of the mounting grooves 321. The main board 302 is connected to the housing 10, and the mounting plate 301 is connected to the mounting bracket by rivets. The main board 302 is welded to the mounting plate 301. The main board 302 has multiple mounting grooves 321. The bottom protective plate 30 includes multiple mounting plates 301 corresponding one-to-one with the multiple mounting grooves 321, and the multiple mounting grooves 321 are spaced apart along the edge of the main board 302. The maximum distance L between the surface of the mounting plate 301 facing the mounting groove 321 and the bottom surface of the mounting groove 321 is greater than or equal to 6 mm and less than or equal to 10 mm. The outer surface of the mounting plate 301 has a first coating, which includes at least one of a polytetrafluoroethylene layer and a polyvinylidene fluoride layer. The outer surface of the main plate 302 has a second coating, which includes a polyvinyl chloride layer. The bottom guard plate 30 has reinforcing ribs 304.

[0129] 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 is used in an electrical device, the electrical device including a mounting bracket, and the battery device comprising: The box-shaped enclosure has a receiving cavity; The battery cell is located in the receiving cavity; A bottom protective plate is located on one side of the enclosure. The bottom protective plate includes a main board and a mounting plate. The surface of the main board has a mounting groove. The mounting plate covers the opening of the mounting groove. The mounting plate is connected to the main board. The main board is connected to the enclosure. The mounting plate is connected to the mounting bracket.

2. The battery device according to claim 1, characterized in that, The motherboard and the mounting plate are integrally formed.

3. The battery device according to claim 1, characterized in that, The motherboard is soldered to the mounting plate.

4. The battery device according to any one of claims 1 to 3, characterized in that, The motherboard has multiple mounting grooves, and the bottom cover plate includes multiple mounting plates that correspond one-to-one with the multiple mounting grooves.

5. The battery device according to any one of claims 1 to 3, characterized in that, The motherboard has a plurality of mounting grooves, and the bottom cover plate includes a mounting plate that covers the openings of the plurality of mounting grooves.

6. The battery device according to any one of claims 1 to 3, characterized in that, The maximum distance between the side surface of the mounting plate facing the mounting groove and the bottom surface of the mounting groove is greater than or equal to 6 mm and less than or equal to 10 mm.

7. The battery device according to any one of claims 1 to 3, characterized in that, The motherboard has a plurality of mounting grooves, which are arranged at intervals along the edge of the motherboard.

8. The battery device according to any one of claims 1 to 3, characterized in that, The outer surface of the mounting plate has a first coating.

9. The battery device according to claim 8, characterized in that, The first coating includes at least one of a polytetrafluoroethylene layer and a polyvinylidene fluoride layer.

10. The battery device according to any one of claims 1 to 3, characterized in that, The outer surface of the motherboard has a second coating.

11. The battery device according to claim 10, characterized in that, The second coating comprises a polyvinyl chloride layer.

12. The battery device according to any one of claims 1 to 3, characterized in that, The bottom protective plate has reinforcing ribs.

13. An electrical appliance, characterized in that, The electrical device includes a battery device as described in any one of claims 1 to 12, the battery device being used to provide electrical energy, and the mounting plate of the battery device being connected to the mounting bracket of the electrical device.

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