Shell, electric driving device, electric driving system and vehicle

Abstract

The utility model is suitable for the technical field of mechanical assembly, and provides a shell, an electric driving device, an electric driving system and a vehicle. The shell comprises a shell main body, a bolt and an insulating part, the shell main body and the bolt are both metal parts and are made of different materials, the shell main body is provided with a mounting surface, a mounting hole is formed in the mounting surface, the bolt comprises a screw rod and a head part which are integrally arranged, the screw rod is assembled in the mounting hole in the first direction, and the head part abuts against the mounting surface; an assembling gap is formed between the head part and the mounting surface, the insulating part comprises a first part and a second part which are integrally arranged, the first part is pressed between the head part and the mounting surface and used for sealing the assembling gap, the second part protrudes out of the mounting surface in the first direction, and the second part is arranged in the circumferential direction of the head part in a surrounding mode and used for isolating the side face of the head part from the mounting surface. According to the technical scheme provided by the embodiment of the invention, the technical problem that electrochemical corrosion is easy to occur in the assembly structure of the shell and the bolt in the related technology can be solved.

Description

Technical Field

[0001] The present application relates to the field of mechanical assembly, and in particular to a housing, an electric drive device, an electric drive system, and a vehicle. Background Art

[0002] A housing is a specific shape and function, widely used in mechanical equipment, electronic products, automotive parts, aerospace, and other fields. Housings are generally used in conjunction with bolts. When both the housing and bolts are metal parts made of different materials, the atomic structure and chemical properties of the metals differ, resulting in differences in their electrode potentials. Under certain environmental conditions, such as humid environments, the assembly of the housing and bolts can easily form an electrochemical cell, leading to electrochemical corrosion. Utility Model Content

[0003] In view of this, the embodiments of the present application provide a housing, an electric drive device, an electric drive system and a vehicle, which solve the technical problem of electrochemical corrosion that is prone to occur in the assembly structure of the housing and the bolts in the related art.

[0004] An embodiment of the first aspect of the present application provides a shell, including: a shell body, having a mounting surface, with a mounting hole arranged on the mounting surface; a bolt, including an integrally arranged screw and a head, the screw is assembled in the mounting hole along a first direction, the head rests on the mounting surface, and an assembly gap is provided between the head and the mounting surface, the bolt and the shell body are both metal parts and the materials of the two are different; an insulating part, including an integrally arranged first part and a second part, the first part is pressed between the head and the mounting surface for sealing the assembly gap, the second part protrudes from the mounting surface along the first direction, and the second part is arranged around the circumference of the head for isolating the side of the head from the mounting surface.

[0005] The shell provided in the embodiment of the present application is provided with an insulating part between the shell body and the bolt, and the insulating part includes a first part and a second part which are integrally arranged, wherein the first part is located between the bolt head and the mounting surface of the shell body, and can seal the assembly gap between the head and the mounting surface to prevent the electrolyte from invading the assembly gap, thereby avoiding electrochemical corrosion at the assembly gap; the second part is arranged around the circumference of the head, and can isolate the side of the head from the mounting surface to prevent the electrolyte from conducting between the side of the head and the mounting surface, thereby avoiding electrochemical corrosion between the surface of the head and the mounting surface. In this way, by providing the insulating part and improving the structure of the insulating part, the problem of electrochemical corrosion that is prone to occur in the assembly structure of the shell body and the bolt in the related art is effectively solved.

[0006] In some embodiments, the mounting surface is further provided with a mounting groove that surrounds the mounting hole and is spaced apart from the mounting hole. The first portion is disposed within the mounting groove and is sealed against the groove wall and the bottom surface of the head portion. The head portion rests against the mounting surface between the mounting groove and the mounting hole, forming an assembly gap. This design improves the reliability of the connection between the bolt and the housing body. Furthermore, the mounting groove can position the insulating member, thereby reducing the difficulty of insulating member assembly and mitigating the problem of insulating member displacement due to factors such as vibration and impact.

[0007] In some embodiments, the head portion partially covers the mounting slot, and the distance between the outer edge of the bottom surface of the head portion and the inner edge of the mounting slot is no less than 3 mm. This design ensures good contact between the bottom surface of the head portion and the first portion, thereby enhancing the sealing effect of the first portion. Furthermore, the head portion can stably press the insulating member, reducing the risk of the insulating member falling off or shifting.

[0008] In some embodiments, the thickness of the first portion in the first direction is greater than or equal to 1.5 mm, and / or the thickness of the second portion protruding from the mounting surface in the first direction is greater than or equal to 1 mm. This design enhances the sealing effect of the first portion and the isolation effect of the second portion, and improves the reliability of the insulating member.

[0009] In some embodiments, the first portion and the second portion are connected in an arc-shaped transition. The above design can reduce the stress concentration problem at the connection between the first portion and the second portion, thereby reducing the risk of deformation and damage at the connection position.

[0010] In some embodiments, the first portion is perpendicular to the second portion. With the above design, the insulating member has a simple structure and is easy to install and position. At the same time, the insulating member has good strength and stability, can be used for a long time and is not easy to deform.

[0011] In some embodiments, the second portion is spaced apart from the side of the head, and the distance between the second portion and the head is greater than 1 mm. This design can prevent the head and the second portion from abrading each other, thereby extending the service life of the insulating member.

[0012] In some embodiments, the shell body is a magnesium alloy shell body, and the bolts are aluminum bolts. With the above design, magnesium alloy and aluminum alloy have certain corrosion resistance and similar electrical potentials, so the assembled structure formed by the two has relatively stable chemical properties.

[0013] In some embodiments, the insulating member is a nylon member. With the above design, the nylon material has good wear resistance and corrosion resistance, and can be used for a long time and maintain stable performance.

[0014] In some embodiments, the case body includes a first sub-shell and a second sub-shell arranged in a first direction. The first sub-shell has a mounting surface on a side facing away from the second sub-shell, and the mounting hole extends through the first sub-shell and into the second sub-shell. This design provides a reliable case body structure. The case body is a split design with high flexibility, adaptable to a variety of application scenarios and meeting different usage requirements.

[0015] An embodiment of the second aspect of the present application provides an electric drive device, including the housing in the first aspect.

[0016] The electric drive device provided in the embodiment of the present application improves the reliability and safety of the electric drive device by adopting the housing provided in the above embodiment.

[0017] An embodiment of the third aspect of the present application provides an electric drive system, comprising a battery device and the electric drive device of the second aspect, wherein the battery device and the electric drive device are electrically connected.

[0018] The electric drive system provided in the embodiment of the present application improves the reliability and safety of the electric drive system by adopting the electric drive device provided in the above embodiment.

[0019] An embodiment of the fourth aspect of the present application provides a vehicle, comprising the electric drive system of the third aspect.

[0020] The vehicle provided in the embodiment of the present application improves the reliability and safety of the vehicle by adopting the electric drive system provided in the above embodiment.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or conventional technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0024] Figure 2 Schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0025] Figure 3This is a schematic structural diagram of an electric drive device according to some embodiments of the present application;

[0026] Figure 4 This is a schematic diagram of the partial structure of the housing of some embodiments of the present application;

[0027] Figure 5 for Figure 4 A schematic diagram of the partial structure of the bolts and the shell body in the shell shown;

[0028] Figure 6 for Figure 4 A schematic diagram of the partial structure of the shell body in the shell shown;

[0029] Figure 7 for Figure 4 Schematic diagram of the structure of the insulating part in the shell shown.

[0030] The meanings of the marks in the figure are:

[0031] 1000. Vehicle; 100. Battery device; 200. Electric drive device;

[0032] 10. Vehicle body;

[0033] 20. Box; 21. First box; 22. Second box;

[0034] 30. Battery cells;

[0035] 40. Shell; 41. Shell body; 411. Mounting surface; 412. Mounting hole; 413. Mounting groove; 414. First subshell; 415. Second subshell; 42. Bolt; 421. Screw; 422. Head; 4221. Flange; 4222. Hexagonal head; 43. Insulator; 431. First part; 432. Second part. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0044] A housing is a structure with a specific shape and function, widely used in fields such as mechanical equipment, electronics, automotive parts, and aerospace. For example, in the electronics sector, a housing can be the housing of a device like a mobile phone or computer, while in the automotive parts sector, it can be the housing of an engine or electric drive unit. Housings are typically used in conjunction with bolts, and the assembly structure and material of the housing and bolts depend on the application requirements. When the housing and bolts are made of different metals, especially when they have different electrochemical properties, a galvanic effect can easily occur in a humid environment, leading to electrochemical corrosion. This electrochemical corrosion occurs at any interface where the housing and bolts come into direct contact and are wetted. For example, in an assembly structure consisting of a magnesium alloy housing and an aluminum bolt, if moisture infiltrates the assembly gap or a continuous water film forms on both surfaces, a galvanic cell structure forms between the magnesium alloy housing and the aluminum bolt. Due to the active chemical properties of magnesium and its low standard potential, the magnesium alloy housing acts as an anode and is preferentially oxidized. Simultaneously, the aluminum bolt acts as a cathode, promoting the corrosion process at the anode, further accelerating corrosion of the magnesium alloy housing.

[0045] Currently, the shell and bolts can be surface treated, for example, by forming an insulating layer on their surfaces through electroplating, spraying, hot-dip plating, etc., to improve their corrosion resistance. However, the insulating coating may be damaged by wear and scratches during use, posing a greater risk of failure. Alternatively, the shell and bolts can be made of the same material, but this design has limitations and cannot be extended to more shell and bolt assembly structures.

[0046] Based on the above considerations, an embodiment of the present application provides a shell, including a shell body, a bolt, and an insulating member. The shell body and the bolt are both metal parts and are made of different materials. The shell body has a mounting surface and a mounting hole is provided on the mounting surface. The bolt is assembled in the mounting hole, and an assembly gap is provided between the head of the bolt and the mounting surface. The insulating member includes a first part and a second part that are integrally provided. The first part is pressed between the head and the mounting surface and is used to seal the assembly gap. The second part is provided along the circumference of the head and is used to isolate the side of the head from the mounting surface. In this way, the first part of the insulating member can prevent the electrolyte from invading the assembly gap, thereby avoiding electrochemical corrosion at the assembly gap. The second part of the insulating member can prevent the electrolyte from conducting between the side of the head and the mounting surface, thereby avoiding electrochemical corrosion between the surface of the head and the mounting surface. Therefore, by providing the insulating member and improving the structure of the insulating member, the problem of electrochemical corrosion easily occurring in the assembly structure of the shell body and the bolt in the related art is effectively solved.

[0047] The housing provided by the embodiments of the present application can be widely used in various fields such as the automotive industry, electronic products, medical equipment, and industrial equipment, meeting the assembly requirements of various devices and providing reliable protection for them. In the automotive industry, the housing can be used to manufacture various parts, such as electric drive units, gearboxes, engines, seat frames, and the like.

[0048] For the convenience of explanation, the embodiment of the present application is described by taking a vehicle 1000 having an electric drive system as an example.

[0049] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application. Based on the power source, vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle. Based on the drive mode, vehicle 1000 can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. Vehicle 1000 includes a body 10 and an electric drive system.

[0050] The vehicle body 10 is the primary supporting component of the vehicle 1000. It comprises a powertrain compartment and a driver's compartment. The powertrain compartment houses the vehicle's powertrain, electronic control, and transmission mechanisms, while the driver's compartment provides operating and seating space for the driver and passengers. If the vehicle 1000 is a front-wheel drive vehicle, the powertrain compartment is located at the front of the vehicle body 10, representing the front compartment. If the vehicle 1000 is a rear-wheel drive vehicle, the powertrain compartment is located at the rear of the vehicle body 10, representing the rear compartment. If the vehicle 1000 is a four-wheel drive vehicle, the powertrain compartment is divided into a front compartment and a rear compartment, with the front compartment located at the front of the vehicle body 10 and the rear compartment located at the rear. The driver's compartment is located between the front and rear sections of the vehicle body 10.

[0051] The electric drive system is the power system of vehicle 1000. It is used to convert electrical energy into mechanical energy and output this mechanical energy to the wheels of vehicle 1000 to drive vehicle 1000. The electric drive system is installed on vehicle body 10. Specifically, a portion of the electric drive system can be installed in the powertrain compartment, and another portion can be installed on the bottom of vehicle body 10. The electric drive system includes a battery device 100 and an electric drive device 200.

[0052] The battery device 100 is used to provide electric energy for the electric drive device 200. The battery device 100 can be installed at the bottom, head or tail of the vehicle 1000. Figure 2 , Figure 2The exploded view of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a housing 20 and a battery cell 30, and the battery cell 30 is accommodated in the housing 20. The housing 20 is used to provide a storage space for the battery cell 30, and the housing 20 can adopt a variety of structures. In some embodiments, the housing 20 may include a first housing 21 and a second housing 22, and the first housing 21 and the second housing 22 cover each other, and the first housing 21 and the second housing 22 jointly define a storage space for accommodating the battery cell 30. The second housing 22 may be a hollow structure with one end open, and the first housing 21 may be a plate-shaped structure, and the first housing 21 covers the open side of the second housing 22, so that the first housing 21 and the second housing 22 jointly define a storage space; the first housing 21 and the second housing 22 may also be hollow structures with one side open, and the open side of the first housing 21 covers the open side of the second housing 22. Of course, the box body 20 formed by the first box body 21 and the second box body 22 can be in various shapes, such as a cylinder, a cuboid, etc.

[0053] In some embodiments, the box 20 may serve as part of the chassis structure of the vehicle 1000. For example, part of the box 20 may become at least a part of the floor of the vehicle 1000, or part of the box 20 may become at least a part of the cross member and longitudinal member of the vehicle 1000.

[0054] In some embodiments, the battery device 100 may not include the box 20 , but rather multiple battery cells 30 are connected and formed into a whole through necessary fixing structures before being assembled into the vehicle 1000 .

[0055] In the battery device 100, there may be multiple battery cells 30, and the multiple battery cells 30 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 30. The multiple battery cells 30 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire assembly of the multiple battery cells 30 is housed within the housing 20. Of course, the battery device 100 may also comprise a battery cell assembly in which multiple battery cells 30 are first connected in series, in parallel, or in a hybrid connection, and then the multiple battery cell 30 assemblies are further connected in series, in parallel, or in a hybrid connection to form an entire assembly, which is then housed within the housing 20. The battery device 100 may also include other functional components, such as a busbar assembly for achieving conductive connections between the multiple battery cell assemblies 30.

[0056] A battery cell 30 is the smallest unit that makes up the battery device 100. Each battery cell 30 can be a secondary battery or a primary battery. A secondary battery is a battery cell 30 that can be recharged to activate its active materials after discharge and continue to be used. A primary battery is a battery cell 30 that cannot be recharged to activate its active materials after its energy is exhausted and continues to be used. The battery cell 30 can be, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, or the like. The battery cell 30 can be cylindrical, flat, rectangular, or other shapes.

[0057] Please refer to Figure 3 , Figure 3 Schematic diagram of the structure of an electric drive device 200. The electric drive device 200 is used to convert the electrical energy provided by the battery device 100 into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive unit 200 is installed in the powertrain compartment. Specifically, when the vehicle 1000 is a front-wheel drive vehicle, the electric drive unit 200 is installed in the front compartment and is used to output the above-mentioned mechanical energy to the front wheels of the vehicle 1000 to drive the vehicle 1000. When the vehicle 1000 is a rear-wheel drive vehicle, the electric drive unit 200 is installed in the rear compartment and is used to output the above-mentioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000. When the vehicle 1000 is a four-wheel drive vehicle, there are two electric drive units 200: one electric drive unit 200 is installed in the front compartment and is used to output the above-mentioned mechanical energy to the front wheels of the vehicle 1000, and the other electric drive unit 200 is installed in the rear compartment and is used to output the above-mentioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive unit 200 mainly consists of an electric drive housing, a power supply, a motor, a transmission device, a controller, and sensors.

[0058] The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings. Figures 1 to 3 , and please refer to Figures 4 to 7 , Figure 4 A schematic diagram of a partial structure of a housing 40 provided in some embodiments of the present application; Figure 5 for Figure 4 A schematic diagram of the partial structure of the bolt 42 and the shell body 41 in the shell 40 is shown; Figure 6 for Figure 4 A schematic diagram of the partial structure of the shell body 41 in the shell 40 is shown; Figure 7 for Figure 4 A schematic structural diagram of the insulating member 43 in the housing 40 is shown.

[0059] The embodiment of the first aspect of the present application provides a housing 40, please refer to Figure 4 and Figure 5 The shell 40 includes a shell body 41, a bolt 42, and an insulating member 43. The shell body 41 has a mounting surface 411, and a mounting hole 412 is provided on the mounting surface 411. The bolt 42 includes an integrally provided screw 421 and a head 422. The screw 421 is assembled in the mounting hole 412 along the first direction X. The head 422 abuts against the mounting surface 411. There is an assembly gap between the head 422 and the mounting surface 411 (not shown in the figure). The bolt 42 and the shell body 41 are both metal parts and the materials of the two are different. The insulating member 43 includes an integrally provided first portion 431 and a second portion 432. The first portion 431 is pressed between the head 422 and the mounting surface 411 to seal the assembly gap. The second portion 432 protrudes from the mounting surface 411 along the first direction X. The second portion 432 is arranged around the circumference of the head 422 to isolate the side of the head 422 from the mounting surface 411.

[0060] The shell body 41 is a basic component of the housing 40, providing a mounting base and physical protection for various parts and components. The specific structure and shape of the shell body 41 can be determined according to the application scenario and design requirements. For example, the shell body 41 can be a single unitary structure, or it can include multiple assembled sub-shells. The shell body 41 can have a regular structure such as a cuboid, cube, or cylinder, or it can have a special-shaped structure with complex curves and openings. The shell body 41 is made of a metal material with a certain strength and rigidity. This makes the shell body 41 less susceptible to deformation when subjected to compression or collision, thus providing the housing 40 with higher structural strength and safety performance. The shell body 41 has one or more mounting surfaces 411, which can be flat walls or have a specific shape to accommodate the bolts 42. The mounting surfaces 411 are provided with one or more mounting holes 412. The mounting holes 412 can be blind holes extending into the interior of the shell body 41, or they can be through holes extending through the shell body 41. The mounting holes 412 are used to connect with fasteners such as bolts 42 and are generally designed as threaded holes.

[0061] The bolt 42 has the function of connecting and fixing. For example, the bolt 42 can be used to connect different parts of the shell body 41, or can be used to fix various parts or components on the shell body 41, or can also be used to fix the shell body 41 to other structures or components. The bolt 42 is made of a metal material with a certain strength and rigidity. For example, it can be made of copper or aluminum, but it is not limited to this. The surface of the screw 421 generally has threads. The screw 421 cooperates with the mounting hole 412 or the nut and other components through the threads. The head 422 has various shapes. For example, the head 422 can be hexagonal or circular, but it is not limited to this. During the processing and manufacturing of the shell body 41 and the bolt 42, due to the limitations of processing accuracy, there will generally be certain dimensional tolerances. The accumulation of these tolerances will result in an assembly gap between the bottom surface of the head 422 and the mounting surface 411. In addition, factors such as surface roughness and assembly process may also cause the bottom surface of the head 422 to be unable to fit tightly against the mounting surface 411, thereby generating an assembly gap.

[0062] The insulating member 43 is used to block the electron transfer path, thereby preventing the bolt 42 and the housing body 41 from forming a galvanic cell structure and preventing electrochemical corrosion. The shape and size of the first portion 431 of the insulating member 43 are determined based on the bottom surface structure of the head 422. For example, the first portion 431 can be a circular thin sheet that fits the entire bottom surface of the head 422, or the first portion 431 can be an annular structure that fits the outer edge of the bottom surface of the head 422. In particular, when the first portion 431 fits the entire bottom surface of the head 422, the first portion 431 can also isolate the bottom surface of the head 422 from the mounting surface 411. The shape and size of the second portion 432 of the insulating member 43 are determined based on the side surface structure of the head 422. For example, the second portion 432 can be an annular structure that wraps around the side surface of the head 422. The second portion 432 is used to further enhance the isolation effect and prevent electrical contact between the side surface of the head 422 and the mounting surface 411. The insulating member 43 is made of a material with good insulation and certain elasticity, such as plastic or rubber, but not limited thereto. The first portion 431 and the second portion 432 can be integrally formed by injection molding, molding, or other processes.

[0063] It should be noted that in the assembly structure of the shell body 41 and the bolt 42, there is an assembly gap between the head 422 and the mounting surface 411. When the insulating part 43 is not provided, there is a risk of moisture intrusion and accumulation in the assembly gap, so that electrochemical corrosion is likely to occur at the assembly gap. In addition, in a humid environment, a water film is likely to form on the surface of the head 422 and the mounting surface 411. When the insulating part 43 is not provided, the water film may connect the side of the head 422 and the mounting surface 411, so that the surface of the head 422 and the mounting surface 411 are likely to undergo electrochemical corrosion.

[0064] The shell 40 provided in the embodiment of the present application is provided with an insulating part 43 between the shell body 41 and the bolt 42, and the insulating part 43 includes a first part 431 and a second part 432 which are integrally arranged, wherein the first part 431 is located between the head 422 of the bolt 42 and the mounting surface 411 of the shell body 41, and can seal the assembly gap between the head 422 and the mounting surface 411 to prevent the electrolyte from invading the assembly gap, thereby avoiding electrochemical corrosion at the assembly gap; the second part 432 is arranged around the circumference of the head 422, and can isolate the side of the head 422 from the mounting surface 411 to prevent the electrolyte from conducting the side of the head 422 and the mounting surface 411, thereby avoiding electrochemical corrosion on the surface of the head 422 and the mounting surface 411. In this way, by providing the insulating part 43 and improving the structure of the insulating part 43, the problem of easy electrochemical corrosion in the assembly structure of the shell body 41 and the bolt 42 in the related art is effectively solved.

[0065] In some embodiments, please refer to Figure 5 and Figure 6 Mounting surface 411 is further provided with a mounting groove 413, which surrounds and is spaced apart from mounting hole 412. First portion 431 is disposed within mounting groove 413 and is sealed against the groove wall of mounting groove 413 and the bottom surface of head portion 422. Head portion 422 rests against mounting surface 411 between mounting groove 413 and mounting hole 412, forming an assembly gap.

[0066] The mounting groove 413 is a blind groove provided on the mounting surface 411. The depth of the mounting groove 413 in the first direction X is generally less than the depth of the mounting hole 412. The mounting groove 413 at least surrounds the outer edge of the bottom surface of the head 422. In other words, the projection of the outer edge of the head 422 on the mounting surface 411 falls within the mounting groove 413. Thus, after the first portion 431 is provided in the mounting groove 413, the outer edge of the bottom surface of the head 422 and the first portion 431 can form good contact, so that the first portion 431 can effectively seal the assembly gap. Optionally, in a specific embodiment, the bottom surface of the head 422 is circular, the mounting groove 413 is annular, the inner edge of the mounting groove 413 has a smaller diameter than the bottom surface of the head 422, and the outer edge of the mounting groove 413 has a larger diameter than the bottom surface of the head 422.

[0067] In this structure, the shape and size of the first portion 431 of the insulating member 43 need to be adapted to the mounting groove 413 . After being pressed into the mounting groove 413 , the first portion 431 can fit tightly against the groove wall of the mounting groove 413 .

[0068] On the one hand, after the first part 431 is pressed into the mounting groove 413, its upper surface is flush with the mounting surface 411. In this way, the outer edge of the bottom surface of the head 422 and the part close to the outer edge can form a good contact with the first part 431. At the same time, the central area of ​​the bottom surface of the head 422 can rest on the mounting surface 411. Therefore, this design is conducive to improving the connection reliability between the bolt 42 and the shell body 41. On the other hand, the mounting groove 413 forms a stepped surface, which further reduces the risk of moisture or other electrolytes invading the assembly gap. On the other hand, the mounting groove 413 can also position the insulating part 43, so this design can also reduce the difficulty of assembling the insulating part 43, and reduce the problem of displacement of the insulating part 43 due to factors such as vibration and impact.

[0069] It can be understood that in some embodiments, the mounting groove 413 can also be connected to the mounting hole 412, the center of the first part 431 is provided with a through hole for the screw 421 to pass through, and the first part 431 can cover the entire bottom surface of the head 422.

[0070] In some embodiments, the head 422 covers a portion of the mounting groove 413 , and a distance between an outer edge of a bottom surface of the head 422 and an inner edge of the mounting groove 413 is not less than 3 mm.

[0071] The head portion 422 covers the entire inner edge of the mounting slot 413 and the portion near the inner edge. The distance between the outer edge of the bottom surface of the head portion 422 and the center of the mounting hole 412 is L1, and the distance between the inner edge of the mounting slot 413 and the center of the mounting hole 412 is L2. L1 is greater than L2, and the difference between the two is no less than 3 mm. The distance between the outer edge of the bottom surface of the head portion 422 and the inner edge of the mounting slot 413 can also be understood as the overlap between the bottom surface of the head portion 422 and the mounting slot 413. At this overlap, the bottom surface of the head portion 422 is in close contact with the first portion 431.

[0072] With the above design, the bottom surface of the head 422 can form good contact with the first part 431, which is conducive to enhancing the sealing effect of the first part 431. At the same time, the head 422 can stably press the insulating part 43, reducing the risk of the insulating part 43 falling off or shifting.

[0073] In some embodiments, please refer to Figure 5 and Figure 7 , a thickness D1 of the first portion 431 in the first direction X is greater than or equal to 1.5 mm, and / or a thickness D2 of the second portion 432 protruding from the mounting surface 411 in the first direction X is greater than or equal to 1 mm.

[0074] Optionally, in a specific embodiment, a thickness D1 of the first portion 431 in the first direction X is 1.5 mm, and a thickness D2 of the second portion 432 protruding from the mounting surface 411 in the first direction X is 1 mm.

[0075] The above design is conducive to enhancing the sealing effect of the first part 431 and the isolation effect of the second part 432, and the reliability of the insulating part 43 is higher. At the same time, the first part 431 is thicker and has better wear resistance, which is also conducive to extending the service life of the insulating part 43.

[0076] It should be noted that, in some embodiments, the first part 431 is arranged in the installation groove 413. In order to ensure the sealing effect, the first part 431 is required to have a certain elasticity, and the first part 431 has a reserved interference. That is, in the natural state, the thickness of the first part 431 in the first direction X is greater than the depth of the accommodating groove 413.

[0077] In some embodiments, please refer to Figure 5 The second portion 432 is spaced apart from the side of the head portion 422 , and the distance L3 between the two is greater than 1 mm.

[0078] The second portion 432 and the head portion 422 are spatially independent of each other, and the second portion 432 forms an isolation barrier around the head portion 422. The spacing between the second portion 432 and the side surface of the head portion 422 can be uniform throughout, or can be designed to be non-uniform based on the shape of the head portion 422. Optionally, in one embodiment, the bolt 42 is a flange bolt 42, and the head portion 422 includes an integrally arranged flange 4221 and a hexagonal head 4222. The flange 4221 is a circular structure. The spacing between the second portion 432 and the outer edge of the flange 4221 is smaller than the spacing between the second portion 432 and the side surface of the hexagonal head 4222. The spacing between the second portion 432 and the outer edge of the flange 4221 is uniform throughout and is 1 mm.

[0079] The side of the head 422 is spaced apart from the second part 432, which can prevent the head 422 and the second part 432 from wearing each other, thereby helping to extend the service life of the insulating part 43. At the same time, this design improves the applicability of the insulating part 43, and the insulating part 43 can be matched with bolts 42 of various sizes or shapes.

[0080] It can be understood that in some embodiments, the head 422 is cylindrical, and the second portion 432 can also be arranged to fit the side of the head 422.

[0081] In some embodiments, the first portion 431 and the second portion 432 are connected in an arc-shaped transition.

[0082] The side of the first part 431 facing the bottom of the head 422 is defined as the first side, and the side of the second part 432 facing the side of the head 422 is defined as the second side. The first side and the second side are connected in an arc-shaped transition at the connection position, that is, a smooth curved connection surface is formed at the connection position.

[0083] The above design can reduce the stress concentration problem at the connection position between the first part 431 and the second part 432, thereby making it less likely for deformation and damage to occur at the connection position. The structure of the insulating member 43 is more reasonable and more reliable.

[0084] It can be understood that in some embodiments, the first portion 431 and the second portion 432 may also be connected vertically, that is, the angle between the first surface and the second surface is 90°.

[0085] In some embodiments, as Figure 5 As shown, the first portion 431 and the second portion 432 of the insulating member 43 are perpendicular to each other.

[0086] The cross section of the insulating member 43 is L-shaped, wherein the first portion 431 can be understood as the horizontal side of the L, and the second portion 432 can be understood as the vertical side of the L.

[0087] With the above design, the insulating member 43 has a simple structure and is easy to install and position. At the same time, the insulating member 43 has good strength and stability, can be used for a long time and is not easy to deform.

[0088] It is understandable that in some embodiments, the insulating member 43 may also be adaptively designed based on the structure of the head 422 . For example, the second portion 432 may be designed to have a special shape that fits the side of the head 422 .

[0089] In some embodiments, the housing body 41 is a magnesium alloy housing body, and the bolts 42 are aluminum bolts.

[0090] Magnesium alloy is a lightweight metal. Using it to form the housing body 41 significantly reduces the weight of the housing 40. Furthermore, magnesium alloy is easily moldable, making it suitable for forming housings 40 of various complex shapes. Magnesium alloy and aluminum alloy have relatively high corrosion resistance and similar electrical potentials, resulting in a relatively stable chemical structure.

[0091] It should be noted that, since magnesium alloys have active chemical properties and easily react with oxygen in the air, in some embodiments, the magnesium alloy shell body can be passivated to form a chemical reaction film on the surface of the magnesium alloy shell body to improve the oxidation resistance of the magnesium alloy shell body.

[0092] In some embodiments, the insulating member 43 is a nylon member.

[0093] The nylon material has high strength and toughness, can withstand the pressure and impact generated when the bolt 42 is tightened, and is not easy to break or deform. At the same time, the nylon material also has good wear resistance and corrosion resistance, and can be used for a long time and maintain stable performance.

[0094] It is understandable that in some embodiments, the insulating member 43 may also be made of a rubber member or other plastic materials, as long as it has certain elasticity, aging resistance, oxidation resistance and insulation properties.

[0095] In some embodiments, the shell body 41 includes a first sub-shell 414 and a second sub-shell 415 arranged in alignment along the first direction X. Figure 4 The first sub-shell 414 has a mounting surface 411 on a side away from the second sub-shell 415 , and the mounting hole 412 passes through the first sub-shell 414 and extends to the second sub-shell 415 .

[0096] The first sub-shell 414 and the second sub-shell 415 are components of the shell body 41, and the two can be matched to form a storage space or an assembly surface. The first sub-shell 414 and the second sub-shell 415 can be regular structures such as a cuboid, a cube, a cylinder, or can also be special-shaped structures with complex curves and openings. The specific structure and shape of the first sub-shell 414 and the second sub-shell 415 can be determined according to the application scenario and design requirements. For example, the second sub-shell 415 can be a hollow structure with an open end, and the first sub-shell 414 can be a plate-like structure. The first sub-shell 414 covers the open side of the second sub-shell 415 to jointly define the storage space. The apertures of the mounting holes 412 on the first sub-shell 414 and the second sub-shell 415 can be the same or different.

[0097] The bolts 42 are used to connect and fix the first sub-case 414 and the second sub-case 415 .

[0098] The above design provides a reliable shell body 41 structure. The shell body 41 is a split design with high flexibility, which can be applied to more application scenarios and meet different usage requirements.

[0099] In an embodiment provided in the present application, the shell 40 includes a first sub-shell 414, a second sub-shell 415, a bolt 42 and an insulating member 43. The first sub-shell 414 and the second sub-shell 415 are arranged in a pair along the first direction X. The first sub-shell 414 has a mounting surface 411 on a side away from the second sub-shell 415. The mounting surface 411 is provided with a mounting hole 412 that passes through the first sub-shell 414 and extends to the second sub-shell 415. The screw 421 of the bolt 42 is assembled in the mounting hole 412 and is used to connect and fix the first sub-shell 414 and the second sub-shell 415. The head 422 of the bolt 42 rests on the mounting surface 411. The mounting surface 411 is also provided with an annular mounting groove 413, which surrounds the mounting hole 412 and is spaced apart from the mounting hole 412. The insulating member 43 includes an integral first portion 431 and a second portion 432, the first portion 431 and the second portion 432 being perpendicular to each other. The first portion 431 is disposed in the mounting groove 413 and is sealed with the groove wall of the mounting groove 413 and the bottom surface of the head 422. The first portion 431 can seal the assembly gap between the head 422 of the bolt 42 and the mounting surface 411 of the first subshell 414 to prevent electrolyte from invading the assembly gap, thereby avoiding electrochemical corrosion at the assembly gap. The second portion 432 protrudes from the mounting surface 411, is arranged around the circumference of the head 422, and is spaced apart from the side of the head 422. The second portion 432 can isolate the side of the head 422 from the mounting surface 411 to prevent electrolyte from conducting between the side of the head 422 and the mounting surface 411, thereby avoiding electrochemical corrosion on the surface of the head 422 and the mounting surface 411. Furthermore, the first sub-shell 414 and the second sub-shell 415 are made of magnesium alloy, the bolt 42 is made of aluminum alloy, and the insulating member 43 is made of nylon. The thickness of the first portion 431 in the first direction X is not less than 1.5 mm, and the thickness of the second portion 432 protruding from the mounting surface 411 is not less than 1 mm. The housing 40 provided in the above embodiment, by providing the insulating member 43 and improving the structure of the insulating member 43, effectively solves the problem of electrochemical corrosion that is prone to occur in the assembly structure of the housing body 41 and the bolt 42 in the related art.

[0100] An embodiment of the second aspect of the present application provides an electric drive device 200 , which includes the housing 40 in the first aspect.

[0101] The electric drive device 200 includes an electric drive housing and structures such as a motor, a transmission device, a controller, and a sensor arranged in the electric drive housing. Optionally, the housing 40 can be the electric drive housing.

[0102] The electric drive device 200 provided in the embodiment of the present application improves the reliability and safety of the electric drive device 200 by adopting the housing 40 provided in the above embodiment.

[0103] An embodiment of the third aspect of the present application provides an electric drive system, including a battery device 100 and the electric drive device 200 of the second aspect, wherein the battery device 100 and the electric drive device 200 are electrically connected.

[0104] The electric drive system provided in the embodiment of the present application improves the reliability and safety of the electric drive system by adopting the electric drive device 200 provided in the above embodiment.

[0105] The fourth aspect of the present application provides a vehicle 1000 including the electric drive system of the third aspect. The vehicle 1000 provided in the embodiment of the present application improves the reliability and safety of the vehicle 1000 by adopting the electric drive system provided in the above embodiment.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A housing, characterized in that: include: The shell body has a mounting surface, and the mounting surface is provided with a mounting hole; A bolt comprising an integrally arranged screw shaft and a head, wherein the screw shaft is assembled into the mounting hole along a first direction, the head rests against the mounting surface, and an assembly gap is defined between the head and the mounting surface; the bolt and the shell body are both metal parts and are made of different materials; The insulating member includes a first part and a second part that are integrally arranged, the first part is pressed between the head and the mounting surface to seal the assembly gap, the second part protrudes from the mounting surface along the first direction, and the second part is arranged around the circumference of the head to isolate the side of the head from the mounting surface.

2. The housing according to claim 1, wherein A mounting groove is also provided on the mounting surface, which surrounds the mounting hole and is spaced apart from the mounting hole. The first part is provided in the mounting groove and is sealed with the groove wall of the mounting groove and the bottom surface of the head. The head rests on the mounting surface between the mounting groove and the mounting hole to form the assembly gap.

3. The housing according to claim 2, wherein: The head portion covers a portion of the mounting groove, and a distance between an outer edge of a bottom surface of the head portion and an inner edge of the mounting groove is not less than 3 mm.

4. The housing according to claim 1, wherein The thickness of the first portion in the first direction is greater than or equal to 1.5 mm, and / or the thickness of the second portion protruding from the mounting surface in the first direction is greater than or equal to 1 mm.

5. The housing according to claim 1, wherein: The second portion is spaced apart from the side surface of the head, and the distance between the second portion and the side surface of the head is greater than 1 mm.

6. The housing according to claim 1, wherein: The first portion is connected to the second portion in an arc-shaped transition.

7. The housing according to claim 1, wherein: The first portion is perpendicular to the second portion.

8. The housing according to any one of claims 1 to 7, wherein: The shell body is a magnesium alloy shell body, and the bolts are aluminum bolts.

9. The housing according to any one of claims 1 to 7, wherein: The insulating part is a nylon part.

10. The housing according to any one of claims 1 to 7, wherein: The shell body includes a first sub-shell and a second sub-shell arranged in alignment along the first direction. The first sub-shell has the mounting surface on a side away from the second sub-shell. The mounting hole passes through the first sub-shell and extends to the second sub-shell.

11. An electric drive device, characterized in that: The invention comprises a housing as claimed in any one of claims 1 to 10.

12. An electric drive system, characterized in that: It comprises a battery device and the electric drive device according to claim 11, wherein the battery device and the electric drive device are electrically connected.

13. A vehicle, characterized in that: Including the electric drive system according to claim 12.

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