Cover plate structure, high-voltage junction box and motor controller

Abstract

The utility model provides a cover plate structure, a high-voltage junction box and a motor controller, and relates to the technical field of mechanical structures. The cover plate structure is applied to the high-voltage junction box and comprises a cover plate body and a reinforcing structure which are integrally formed, a first mounting hole is formed in the cover plate body, and the cover plate body and a box body of the high-voltage junction box are detachably connected at the first mounting hole through a fastener; and the reinforcing structure is convexly or concavely arranged at a position, corresponding to the first mounting hole, on the cover plate body. According to the cover plate structure, the reinforcing structure is arranged on the cover plate body in the protruding or concave mode, the cover plate body and the reinforcing structure are integrally formed, and the reinforcing structure is arranged at the position, corresponding to the first installation hole used for installing the fastening piece, of the cover plate body. The structural strength and the structural stability of the cover plate body at the first mounting hole are remarkably improved, it is ensured that the cover plate body does not deform when fasteners are mounted and in the long-term use process, and the sealing effect of the high-voltage junction box is ensured.

Description

Technical Field

[0001] This utility model relates to the field of mechanical structure technology, specifically to a cover plate structure, a high-voltage junction box, and a motor controller. Background Technology

[0002] As competition intensifies in the new energy vehicle market, OEMs are constantly pursuing low-cost, high-quality products to enhance their market competitiveness. The electric drive system, as the power source for new energy vehicles, is an indispensable core component, and its performance directly affects the reliability and safety of the entire vehicle.

[0003] As a key component of electric drive systems, motor controllers typically employ high-voltage junction boxes to seal and protect high-voltage components such as DC mounting bases and fuses, ensuring the electrical safety and environmental adaptability of the electric drive system. In related technologies, to achieve IP67 or IP6K9K protection ratings for motor controllers, a cover plate and sealant are usually used to seal the high-voltage junction box body, which is then reinforced with screws to ensure effective protection of the corresponding high-voltage components housed within the box.

[0004] However, the covers of high-voltage junction boxes are usually made of flat plates. After the fasteners are tightened, the covers are prone to local deformation, which leads to uneven stress on the sealant layer between the cover and the box body. The sealant in some areas cannot be fully compressed, thus affecting the sealing effect and increasing the risk of air leakage or water ingress into the high-voltage junction box. In addition, under long-term vibration, temperature change and other operating conditions, the deformation of the cover may be further aggravated, affecting the long-term reliability of the motor controller. Utility Model Content

[0005] The problem this invention addresses is: how to improve the structural stability of the cover plate to ensure the sealing effect of the high-voltage junction box.

[0006] To solve the above problems, this utility model provides a cover plate structure, a high-voltage junction box, and a motor controller.

[0007] In a first aspect, this utility model provides a cover plate structure applied to a high-voltage junction box. The cover plate structure includes an integrally formed cover plate body and a reinforcing structure. The cover plate body is provided with a first mounting hole. The cover plate body and the box body of the high-voltage junction box are detachably connected at the first mounting hole by fasteners. The reinforcing structure is protruding or recessed on the cover plate body at a position corresponding to the first mounting hole.

[0008] Optionally, the reinforcing structure includes a flange structure disposed on the edge of the cover plate body, and a plurality of the first mounting holes are located within the area enclosed by the flange structure.

[0009] Optionally, the end of the flange structure away from the cover plate body extends toward the direction of the box body, and / or extends toward the direction away from the box body.

[0010] Optionally, the end of the flange structure away from the cover body extends in a direction away from the box body; the flange structure is arranged around the edge of the cover body, and the flange structure is provided with a drainage outlet at the lower edge of the cover body.

[0011] Optionally, the reinforcing structure may further include reinforcing ribs protruding or recessed on the cover plate body.

[0012] Optionally, the first mounting hole is provided in multiple ways, and the center distance between any two first mounting holes with the closest center distance is less than or equal to the preset hole distance.

[0013] Optionally, the cover plate body has a positioning groove for attaching high-voltage markings on the side opposite to the box body.

[0014] Secondly, this utility model provides a high-voltage junction box, including a box body, an annular sealing layer, and the aforementioned cover plate structure. The edge of the box body is provided with an annular sealing groove, and a plurality of second mounting holes are arranged at intervals around the sealing groove and are adapted to the first mounting holes on the cover plate body of the cover plate structure. The cover plate body and the box body are detachably connected at the first mounting holes and the second mounting holes by fasteners. The sealing layer is disposed in the sealing groove.

[0015] Optionally, the distance between the sealant layer and the edge of the sealing groove is greater than or equal to a preset distance.

[0016] Thirdly, this utility model provides a motor controller, including the cover structure as described in the first aspect, or the high-voltage junction box as described in the second aspect.

[0017] The beneficial effects of the cover plate structure, high-voltage junction box, and motor controller of this utility model are as follows: The cover plate structure of this utility model, by providing protruding or recessed reinforcing structures on the cover plate body, and with the cover plate body and reinforcing structures integrally formed, effectively improves the cover plate structure's resistance to deformation and impact, enhances its structural strength and stability, and facilitates low-cost manufacturing of the reinforcing structure and the overall cover plate structure. Furthermore, the reinforcing structure is located on the cover plate body at a position corresponding to the first mounting hole for fastener installation, significantly improving the structural strength and stability of the cover plate body at the first mounting hole. This ensures that the cover plate body will not deform during fastener installation and will not deform under long-term vibration, temperature changes, and other operating conditions. This guarantees the long-term sealing effect between the cover plate structure and the high-voltage junction box through the sealing adhesive layer, improving the long-term reliability of the high-voltage junction box and the motor controller using the high-voltage junction box. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure when the cover plate structure is installed on the box body in an embodiment of this utility model;

[0019] Figure 2 This is a cross-sectional view of the high-voltage junction box in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the cover plate structure in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram showing the positional relationship between the cover plate structure and the sealant layer in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Cover plate structure; 11. Cover plate body; 11a. First mounting hole; 11b. Positioning groove; 12. Reinforcing structure; 121. Flanged structure; 12a. Drain outlet; 122. Reinforcing rib; 2. Box body; 21. Sealing groove; 3. Sealing adhesive layer; 4. Fasteners; 51. High pressure marking; 52. High pressure positive and negative marking. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0026] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be understood as "one or more". The term "connection" used in this utility model, unless specifically stated otherwise, can refer to a direct connection, an indirect connection via one or more intermediate components, a detachable connection, welding, or an integral connection.

[0027] Combination Figure 1 , Figure 2 As shown, this utility model embodiment provides a cover plate structure 1, which is applied to a high-voltage junction box. It includes an integrally formed cover plate body 11 and a reinforcing structure 12. The cover plate body 11 is provided with a first mounting hole 11a. The cover plate body 11 and the box body 2 of the high-voltage junction box are detachably connected at the first mounting hole 11a by fasteners 4. The reinforcing structure 12 is protruded or recessed on the cover plate body 11 at a position corresponding to the first mounting hole 11a.

[0028] In this embodiment, the cover structure 1 is applied to the high-voltage junction box to cooperate with the box body 2 of the high-voltage junction box to seal the opening of the box body 2. It can also work with the sealing adhesive layer 3 to seal the box body 2, preventing dust, moisture, or other impurities from entering the box body 2 through the opening, thereby ensuring the safety and reliability of the high-voltage components inside the box body 2. The cover structure 1 includes a cover body 11 and a reinforcing structure 12 (such as a flanged structure 121, reinforcing rib 122, etc.) disposed on the cover body 11. The reinforcing structure 12 is integrally formed with the cover body 11 (e.g., the reinforcing structure 12 can be formed by stamping). The reinforcing structure 12, formed by stamping, enhances the overall structural strength of the cover body 11 and the cover structure 1, improves the deformation resistance and impact resistance of the cover structure 1, and enhances the structural strength and stability of the cover structure 1. This prevents the cover structure 1 from deforming during the installation of fasteners 4, thus affecting the sealing effect of the high-voltage junction box and ensuring that the high-voltage junction box meets the corresponding protection requirements. Furthermore, in order to ensure that the reinforcement structure 12 can effectively improve the overall structural strength and stability of the cover plate structure 1, it is preferable that the reinforcement structure 12 is protruding or recessed on the cover plate body 11.

[0029] The cover plate body 11 has a first mounting hole 11a for installing fasteners 4. The cover plate body 11 and the box body 2 of the high-voltage junction box are detachably connected at the first mounting hole 11a by fasteners 4 to ensure the stability of the cover plate body 11 when connected (installed) to the box body 2 and the convenience of disassembly. To ensure that the reinforcing structure 12 effectively improves the structural strength and structural stability of the cover plate structure 1, and to avoid excessive setting of the reinforcing structure 12 which would greatly increase the production cost and difficulty, the reinforcing structure 12 is set at least at the position on the cover plate body 11 corresponding to the first mounting hole 11a. For example, the reinforcing structure 12 is set near the first mounting hole 11a to specifically prevent the cover plate structure 1 from deforming when the fasteners 4 are installed. Alternatively, the reinforcing structure 12 can be set at other positions that can prevent the cover plate structure 1 from deforming when the fasteners 4 are installed and can effectively improve the structural strength and structural stability of the cover plate structure 1 (the position can be determined by experimental measurement or mechanical analysis).

[0030] In summary, the cover plate structure 1, by providing a reinforcing structure 12 protruding or recessed on the cover plate body 11, and by integrally molding the cover plate body 11 and the reinforcing structure 12, effectively improves the cover plate structure 1's resistance to deformation and impact, enhances its structural strength and stability, and facilitates low-cost manufacturing of the reinforcing structure 12 and the cover plate structure 1 as a whole. Furthermore, the reinforcing structure 12 is positioned on the cover plate body 11 at a location corresponding to the first mounting hole 11a for installing the fastener 4, significantly improving the structural strength and stability of the cover plate body 11 at the first mounting hole 11a. This ensures that the cover plate body 11 will not deform during the installation of the fastener 4, and that it will not deform under long-term vibration, temperature changes, and other operating conditions. This guarantees the long-term sealing effect between the cover plate structure 1 and the high-voltage junction box body 2 through the sealing layer 3, improving the long-term reliability of the high-voltage junction box and the motor controller using the high-voltage junction box. In addition, compared with the high cost problem caused by directly thickening the cover plate to improve its structural strength and stability in related technologies, in this embodiment, the structural strength and stability of the cover plate structure 1 can be improved at low cost by protruding or recessing the reinforcing structure 12 on the cover plate body 11.

[0031] Optionally, combined Figures 1-4 As shown, the reinforcing structure 12 includes a flange structure 121 disposed on the edge of the cover plate body 11, and a plurality of first mounting holes 11a are located in the area enclosed by the flange structure 121.

[0032] In this embodiment, the cover plate body 11 is provided with multiple first mounting holes 11a for installing fasteners 4. This ensures the stable and reliable connection between the cover plate body 11 and the high-voltage junction box body 2, and ensures that the cover plate structure 1 will not loosen or fall off due to vibration, external force, or thermal expansion during the entire use process, thereby maintaining the sealing performance of the high-voltage junction box. The multiple first mounting holes 11a can be evenly distributed on the cover plate body 11 to effectively disperse the pressure between the cover plate body 11 and the high-voltage junction box body 2, ensuring uniform stress throughout the connection area and avoiding local deformation or poor sealing.

[0033] To enhance the strength and stability of the cover plate structure 1, the edges of the cover plate body 11 are reinforced by a flange structure 121. The flange structure 121 involves bending or rolling the edge portion of the cover plate body 11 at a certain angle to form a protruding edge. This design effectively disperses stress when the cover plate body 11 is subjected to external forces or the action of the fasteners 4, enhancing the overall structure's resistance to deformation and impact, thereby improving the strength and stability of the cover plate structure 1. Multiple first mounting holes 11a are located within the area enclosed by the flange structure 121 to ensure that the flange structure 121 provides a more robust support area for the fasteners 4 during installation, thus preventing deformation or damage to the cover plate body 11 due to the pressure applied by the fasteners 4.

[0034] Optionally, the engagement length of fastener 4 is greater than a preset multiple of the nominal diameter of fastener 4.

[0035] Considering that the engagement length of fasteners 4 (such as bolts) in related technologies is usually 1D (i.e., one time the nominal diameter of fastener 4), which may result in an unstable connection, in this embodiment, the engagement length of fastener 4 is greater than a preset multiple (e.g., 1.5 times) the nominal diameter of fastener 4. By increasing the engagement length, the contact area between fastener 4 and cover structure 1 and box 2 is increased, the thread engagement force of fastener 4 is enhanced, thereby improving the stability and vibration resistance of the connection, effectively reducing the risk of loosening caused by vibration or external force, and ensuring the safety and reliability of high-voltage junction boxes or corresponding components in long-term use.

[0036] Optionally, the end of the flange structure 121 away from the cover body 11 extends toward the direction of the box body 2, and / or extends toward the direction away from the box body 2.

[0037] In this embodiment, the end of the flange structure 121 away from the cover plate body 11 can extend towards the box body 2. On the one hand, the contact area between the cover plate structure 1 and the box body 2 can be increased through the contact between the flange structure 121 and the box body 2, and the flange part can form a tighter contact with the surface of the high voltage junction box 2, thereby further improving the connection stability between the cover plate structure 1 and the box body 2. On the other hand, the flange part can block the connection between the cover plate body 11 and the box body 2, preventing external substances (such as moisture, dust, etc.) from entering the box body 2 through the connection, thereby further enhancing the sealing effect on the basis of the sealing adhesive layer 3 between the cover plate structure 1 and the box body 2.

[0038] Or, combine Figure 1 , Figure 2As shown, the end of the flange structure 121 away from the cover plate body 11 can also extend in the direction away from the box body 2, which can protect the components located on the side of the cover plate body 11 away from the box body 2. That is, since the end of the flange structure 121 away from the cover plate body 11 extends in the direction away from the box body 2, it forms a groove structure on the side of the cover plate body 11 away from the box body 2. The flange structure 121, as the groove wall of the groove structure, protects the components located in the groove structure. Specifically, the end of the flange structure 121 away from the cover plate body 11 has a certain height relative to the side of the cover plate body 11 away from the box body 2. That is, there is a certain distance between the end of the flange structure 121 away from the cover plate body 11 and the side of the cover plate body 11 away from the box body 2. For the high voltage marking 51 sticker pasted on the side of the cover plate body 11 away from the box body 2, the flange structure 121 can effectively prevent the sticker from being damaged by external physical contact or friction during long-term use, ensuring the long-term visibility and accuracy of the high voltage marking 51, and ensuring the safety of the high voltage junction box. Since the fastener 4 is installed (screwed in) from the side of the cover plate body 11 away from the box body 2, that is, the head of the fastener 4 is located on the side of the cover plate body 11 away from the box body 2, the flange structure 121 can protect the head of the fastener 4. That is, the protrusion formed by the end of the flange structure 121 away from the cover plate body 11 can effectively surround or cover the head of the fastener 4, thereby preventing the head of the fastener 4 from being subjected to external impact, friction or other mechanical damage during installation or use, avoiding installation and disassembly problems or structural instability caused by damage to the head of the fastener 4, thus extending the service life of the fastener 4, and ensuring that the connection between the cover plate structure 1 and the high-voltage junction box body 2 is stable and reliable; and for fasteners 4 with sharp edges on the head, the flange structure 121 covers or covers the head of the fastener 4, avoiding direct exposure of the head of the fastener 4, which can effectively prevent physical injury (such as scratches or cuts) to relevant personnel (such as installation and maintenance personnel).

[0039] Alternatively, the flange structure 121 can have both a portion extending towards the box 2 from the end away from the cover plate body 11 and another portion extending away from the cover plate body 11 from the direction opposite to the box 2. The portion of the flange structure 121 extending towards the box 2 from the end away from the cover plate body 11 can increase the contact area between the cover plate structure 1 and the box 2 through contact with the box 2. This portion can form a tighter contact with the surface of the high-voltage junction box 2, thereby further improving the connection stability between the cover plate structure 1 and the box 2. Furthermore, this portion can shield the connection between the cover plate body 11 and the box 2, preventing external substances (such as moisture, dust, etc.) from entering the box 2 through the connection, thus further enhancing the sealing effect based on the sealing adhesive layer 3 between the cover plate structure 1 and the box 2. For the other part of the flange structure 121 that extends away from the cover plate body 11 in the direction away from the box body 2, it can protect the components located on the side of the cover plate body 11 away from the box body 2. That is, since the end of this part that extends away from the cover plate body 11 in the direction away from the box body 2 forms a groove structure on the side of the cover plate body 11 away from the box body 2, this part, as the groove wall of the groove structure, protects the components located in the groove structure.

[0040] Optionally, combined Figure 1 , Figure 3 As shown, the end of the flange structure 121 away from the cover body 11 extends in a direction away from the box body 2; the flange structure 121 is arranged around the edge of the cover body 11, and the flange structure 121 is provided with a drain outlet 12a at the lower edge of the cover body 11.

[0041] Since the end of the flange structure 121 away from the cover body 11 extends in a direction away from the box body 2, if all edges of the cover body 11 are provided with flange structures 121, the flange structure 121 will be a complete ring (such as a circular ring, elliptical ring, polygonal ring, or irregular ring, etc.). In some cases, water is prone to accumulate inside the flange structure 121, especially when the external environment is humid or rainy. Water may not be able to drain smoothly due to the sealing of the annular flange structure 121, and thus accumulate on the inner side of the flange structure 121, affecting the long-term use of the cover structure 1. In this embodiment, an opening (denoted as drainage outlet 12a) is provided on the flange structure 121 at the lower edge of the cover body 11 in the vertical direction to ensure that water can drain smoothly from the drainage outlet 12a, avoid water accumulation, maintain the sealing and impact resistance of the cover structure 1, improve the performance and durability of the cover structure 1, and ensure the long-term reliability of the cover structure 1.

[0042] Optionally, combined Figures 1-4 As shown, the reinforcing structure 12 also includes reinforcing ribs 122 that are protruding or recessed on the cover plate body 11.

[0043] In this embodiment, to further enhance the structural strength and stability of the cover plate body 11, reinforcing ribs 122 are provided on the cover plate body 11, either protruding or recessed. Each reinforcing rib 122 is one or more ribs extending along the surface of the cover plate body 11. A protruding rib 122 protrudes from the cover plate body 11 in a direction away from the box body 2, while a recessed rib 122 is recessed from the cover plate body 11 in a direction towards the box body 2. By providing reinforcing ribs 122, the deformation resistance and overall structural strength of the cover plate body 11 can be effectively enhanced. The presence of reinforcing ribs 122 can disperse stress when the cover plate body 11 is subjected to external forces, preventing excessive deformation or damage in localized areas.

[0044] For example, the reinforcing ribs 122 can be arranged along the length or width of the cover body 11, and the arrangement can be adjusted according to actual needs to ensure that the cover structure 1 is provided with necessary support at key positions, so as to further improve the durability of the cover body 11 in the process of withstanding fastening force, external impact and long-term use, and ensure that the sealing effect between the cover and the box 2 is not affected by the deformation of the cover body 11, thereby improving the reliability and service life of the high-voltage junction box.

[0045] Moreover, the setting of the reinforcing rib 122 simplifies the process requirements (such as stamping) in the manufacturing of the cover plate body 11, and can significantly enhance the structural strength of the cover plate body 11 in a low-cost, low-difficulty, and high-efficiency manner.

[0046] Optionally, combined Figures 1-4 As shown, there are multiple first mounting holes 11a, and the center distance between any two first mounting holes 11a with the closest center distance is less than or equal to the preset hole distance.

[0047] In this embodiment, in order to ensure the fastening effect of the cover plate body 11 when it is installed to the high voltage junction box 2, and to improve the stability and reliability of the overall structure, the cover plate body 11 is provided with a plurality of first mounting holes 11a for fasteners 4 to pass through to achieve a firm connection.

[0048] Furthermore, considering the problems of unstable fixing and poor vibration resistance caused by excessive bolt hole spacing in related technologies, in this embodiment, for the hole spacing of the first mounting hole 11a, it is preferable that the center distance between any two first mounting holes 11a with the closest center distance is less than or equal to a preset hole spacing value (denoted as preset hole spacing). The preset hole spacing is a critical hole spacing value that can ensure stable connection, good vibration resistance, and good NVH (noise, vibration, and harshness) performance, which is determined by experimental measurement or mechanical analysis in advance. When the center distance between any two first mounting holes 11a with the closest center distance is less than or equal to the preset hole spacing, it can ensure that the cover plate structure 1 and the box body 2 form a stable connection, effectively improve the vibration resistance of the high-voltage junction box, reduce the risk of loosening of fasteners 4 due to vibration, and reduce structural noise caused by vibration, thereby improving the NVH (noise, vibration, and harshness) performance of the high-voltage junction box, thereby improving the safety and service life of the high-voltage junction box, and avoiding performance degradation or failure of the high-voltage junction box due to mechanical fatigue during long-term operation.

[0049] For example, compared to the problem of excessively large bolt hole spacing in related technologies where the local bolt hole spacing is 83mm, the preset hole spacing can be 80mm, so that the center distance between any two first mounting holes 11a with the closest center distance is less than or equal to the preset hole spacing, thereby optimizing the connection stability between the cover plate structure 1 and the box body 2, the vibration resistance of the high voltage junction box, and the NVH (noise, vibration and harshness) performance of the high voltage junction box.

[0050] Optionally, combined Figures 1-3 As shown, the cover plate body 11 has a positioning groove 11b on the side opposite to the box body 2 for attaching the high voltage mark 51.

[0051] Considering that the application of high-voltage label 51 stickers on high-voltage junction boxes in related technologies is usually done manually using tooling, relying on the user's experience and skill, and lacking error-proofing features, it is easy to misalign the stickers. Therefore, in this embodiment, a positioning groove 11b for applying the high-voltage label 51 is provided on the side of the cover plate body 11 opposite to the box body 2. This serves as a pre-set, fixed positioning area on the cover plate body 11, assisting in the application of the high-voltage label 51 and avoiding misalignment caused by human error (such as the inability to determine the accurate application position of the high-voltage label 51) during manual application, thus improving the consistency and accuracy of the high-voltage label 51 application.

[0052] The shape and size of the positioning groove 11b match the high-voltage label 51 sticker, forming a mistake-proof design that ensures the label is accurately placed into the groove, thereby reducing rework due to misalignment or off-center application and improving production efficiency. Simultaneously, the recessed structure of the positioning groove 11b also protects the label to some extent, preventing it from falling off or being damaged due to friction, external impact, or airflow, thus enhancing the long-term visibility and reliability of the high-voltage warning information and ensuring the safe use of the high-voltage junction box.

[0053] In some embodiments, the positioning groove 11b may be directly recessed on the side of the cover plate body 11 away from the box body 2; or it may be recessed on the reinforcing rib 122 protruding on the side of the cover plate body 11 away from the box body 2.

[0054] Optionally, the shape of the positioning groove 11b is adapted to the shape of the high-voltage mark 51, and the positioning groove 11b is slightly larger than the high-voltage mark 51, improving the ease of pasting the high-voltage mark 51. For example, for a triangular high-voltage mark 51 sticker, the positioning groove 11b is a triangular recess with a matching shape, and the triangular recess is 1mm larger than one side of the high-voltage mark 51 sticker.

[0055] Optionally, the positioning groove 11b has a certain depth to match the thickness of the high-voltage marking 51 sticker. For example, the depth can be 0.2mm.

[0056] Optionally, the cover structure 1 is made of high-strength material.

[0057] Considering that the cover structure 1 in related technologies is usually made of aluminum plate, which has disadvantages such as easy deformation and poor impact resistance, this embodiment preferably uses a high-strength material, such as HC340 / 590DP high-strength steel, to improve the impact deformation resistance of the cover structure 1, enhance the structural strength and stability of the cover, and thus improve the reliability and service life of the high-voltage junction box and motor controller. Furthermore, using a high-strength material can effectively reduce the amplitude of external vibrations transmitted to the cover structure 1 and the high-voltage junction box, thereby reducing vibration-induced noise, improving the noise reduction capability of the high-voltage junction box and motor controller, and optimizing their NVH performance.

[0058] Combination Figure 1 , Figure 2 As shown, another embodiment of the present invention provides a high-voltage junction box, including a box body 2, an annular sealing layer 3, and the aforementioned cover structure 1. The edge of the box body 2 is provided with an annular sealing groove 21, and a plurality of second mounting holes that are spaced around the sealing groove 21 and are adapted to the first mounting holes 11a on the cover body 11 of the cover structure 1. The cover body 11 and the box body 2 are detachably connected at the first mounting holes 11a and the second mounting holes by fasteners 4. The sealing layer 3 is disposed in the sealing groove 21.

[0059] In this embodiment, the high-voltage junction box includes a box body 2, a sealing layer 3, and the aforementioned cover structure 1. The sealing layer 3 is disposed between the box body 2 and the cover structure 1, serving a sealing function to reduce the risk of leakage (i.e., preventing moisture, dust, and other external contaminants from entering the interior of the high-voltage junction box), thereby protecting the electrical components inside the high-voltage junction box from the influence of external environmental factors and ensuring the long-term stability and reliability of the high-voltage junction box. Specifically, the edge of the box body 2 is provided with a sealing groove 21 in the shape of an annular ring (such as a circular ring, elliptical ring, polygonal ring, or irregular ring, etc.). The shape of the sealing layer 3 is adapted to the sealing groove 21 and is used to be disposed within the sealing groove 21, ensuring that the sealing layer 3 can achieve a stable seal between the box body 2 and the cover structure 1, improving the sealing effect of the high-voltage junction box, and achieving effective sealing protection for high-voltage components such as DC mounting brackets and fuses inside the high-voltage junction box.

[0060] Furthermore, the edge of the housing 2 is provided with multiple second mounting holes, the positions of which are adapted to the first mounting holes 11a (e.g., one-to-one correspondence) to ensure that the fasteners 4 used to connect the housing 2 and the cover structure 1 can be smoothly connected through the first mounting holes 11a and the second mounting holes. The multiple second mounting holes are spaced apart around the sealing groove 21. On the one hand, this ensures that the sealing groove 21 is located within the area enclosed by the multiple second mounting holes, guaranteeing that the fasteners 4 are positioned outside the annular sealing groove 21 (or the sealing layer 3), thereby preventing moisture and impurities from entering the sealing area through the first mounting holes 11a and the second mounting holes, ensuring the sealing effect of the high-voltage junction box. On the other hand, this allows the sealing layer 3 located between the housing 2 and the cover structure 1 to be evenly stressed, further improving the sealing effect. Moreover, based on this structural design, multiple seals can be achieved between the housing 2 and the cover structure 1. For example, the housing 2 and the cover structure 1 are initially sealed by the connection of the fasteners 4, and the sealing layer 3 located within the area enclosed by the multiple fasteners 4 achieves a further seal between the housing 2 and the cover structure 1, effectively improving the sealing effect.

[0061] In some embodiments, the sealant layer 3 can be a pre-fabricated annular sealant ring, or it can be an annular structure formed by applying sealant to the sealing groove 21 and then squeezing the sealant when the housing 2 and the cover structure 1 are connected by fasteners 4. Based on the sealant setting, the sealant is compressed and fixed by the pressure of the fasteners 4 to form a stable sealing effect, effectively preventing the intrusion of external moisture, dust and other substances, protecting the high-voltage components inside the housing 2 from environmental influences, and ensuring the normal operation and reliability of the high-voltage junction box. The sealant layer 3 formed by applying sealant can be a CIPG (Cured-In-Place Gasket) curing adhesive. CIPG curing adhesive is usually applied to the contact surface in liquid or semi-solid form and then cured by chemical reaction or heat to form a sealing structure.

[0062] Optionally, a high-voltage marking 51 is affixed to the cover structure 1 of the high-voltage junction box, serving as a corresponding identification and warning function; and a high-voltage positive and negative marking 52 is also affixed to the cover structure 1 of the high-voltage junction box, corresponding to the positions of the corresponding positive and negative terminals, ensuring that operators can clearly distinguish the terminal port types during operation, thereby improving the safety of operators during wiring and maintenance. In some embodiments, the high-voltage positive and negative marking 52 can be directly set on the cover structure 1, such as by stamping.

[0063] Optionally, combined Figure 1 As shown, the distance between the sealant layer 3 and the edge of the sealing groove 21 is greater than or equal to the preset distance.

[0064] Considering that in related technologies, if the sealing strip is too close to the edge of the groove, there is a risk that the strip may be cut by the sharp edge of the groove, affecting the sealing effect, therefore, in this embodiment, the distance between the sealing layer 3 and the edge of the sealing groove 21 is greater than or equal to a preset distance. For example, during or after installation, the distance between the inner ring of the sealing layer 3 and the corresponding edge of the sealing groove 21 is greater than or equal to the preset distance, and / or, the distance between the outer ring of the sealing layer 3 and the corresponding edge of the sealing groove 21 is greater than or equal to the preset distance. This is to avoid the sealing strip being easily cut (i.e., the edge of the sealing groove 21 cuts the edge of the sealing layer 3) when it is squeezed during installation or further squeezed after installation, thus ensuring the durability and reliability of the sealing effect. For example, compared to the related technology where the distance between the sealing strip and the edge of the groove is 1mm, which makes the sealing strip easily cut and damaged when squeezed during installation or further squeezed after installation, the preset distance can be 2mm.

[0065] For the preset distance during the installation of the sealant layer 3, for example, for the prefabricated annular sealant layer 3, the installation position of the sealant layer 3 in the sealing groove 21 is determined based on its corresponding preset distance, ensuring that the distance from the inner edge and / or outer edge of the sealant layer 3 to the edge of the sealing groove 21 is greater than or equal to the preset distance, ensuring that the sealant layer 3 remains at a certain distance from the edge of the sealing groove 21 when subsequently squeezed by the box body 2 and the cover plate structure 1, thus avoiding the risk of edge cutting; for the sealant layer 3 formed by dispensing, the dispensing position in the sealing groove 21 is determined based on its corresponding preset distance, ensuring that the distance from the inner edge and / or outer edge of the sealant to the edge of the sealing groove 21 after dispensing is greater than or equal to the preset distance, ensuring that the inner edge and / or outer edge of the sealant layer 3 formed by subsequent squeezing by the box body 2 and the cover plate structure 1 remains at a certain distance from the edge of the sealing groove 21, thus avoiding the risk of edge cutting. Different sealant layers 3 have different preset distances. When determining the preset distance, the performance of the sealant must be considered. For example, for sealant layers 3 formed by dispensing, the dimensional chain calculations must fully consider the dispensing trajectory tolerance and glue width tolerance to ensure that no edge cutting occurs and that the sealant can evenly fill the sealing groove 21 during compression, forming an effective seal. Thus, the preset distance can be optimized according to the physical properties of the sealant, the shape of the sealing groove 21, and the pressure applied by the fastener 4, ensuring that the sealant layer 3 is evenly distributed in the sealing groove 21 during installation and that there is a certain distance between the installed sealant layer 3 and the edge of the sealing groove 21, extending the service life of the sealant layer 3, improving the sealing performance of the entire high-voltage junction box system, and ensuring long-term reliability.

[0066] Another embodiment of the present invention provides a motor controller, including the cover structure 1 described above or the high-voltage junction box described above.

[0067] In this embodiment, the motor controller employs the aforementioned cover structure 1 or the aforementioned high-voltage junction box to ensure that the cover structure 1 used in the high-voltage junction box of the motor controller has high structural strength and stability, thus guaranteeing the sealing effect of the high-voltage junction box. Specifically, the cover structure 1 is provided with a reinforcing structure 12 protruding or recessed on the cover body 11, and the cover body 11 and the reinforcing structure 12 are integrally formed, thereby effectively improving the deformation resistance and impact resistance of the cover structure 1, enhancing the structural strength and structural stability of the cover structure 1, and facilitating the low-cost production and manufacturing of the reinforcing structure 12 and the cover structure 1 as a whole. Furthermore, the reinforcing structure 12 is positioned on the cover plate body 11 at a location corresponding to the first mounting hole 11a for installing the fastener 4, thereby significantly improving the structural strength and stability of the cover plate body 11 at the first mounting hole 11a. This ensures that the cover plate body 11 will not deform when the fastener 4 is installed, and that the cover plate body 11 will not deform under long-term vibration, temperature changes, and other operating conditions. This ensures the long-term sealing effect between the cover plate structure 1 and the high-voltage junction box body 2 through the sealing adhesive layer 3, and improves the long-term reliability of the high-voltage junction box and the motor controller using the high-voltage junction box.

[0068] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A cover plate structure, characterized in that, The cover structure (1) is used in a high-voltage junction box. It includes an integrally formed cover body (11) and a reinforcing structure (12). The cover body (11) is provided with a first mounting hole (11a). The cover body (11) and the box body (2) of the high-voltage junction box are detachably connected at the first mounting hole (11a) by fasteners (4). The reinforcing structure (12) is protruding or recessed on the cover body (11) at a position corresponding to the first mounting hole (11a).

2. The cover plate structure as described in claim 1, characterized in that, The reinforcing structure (12) includes a flange structure (121) disposed on the edge of the cover plate body (11), and a plurality of the first mounting holes (11a) are located in the area enclosed by the flange structure (121).

3. The cover plate structure as described in claim 2, characterized in that, The flange structure (121) extends away from the cover plate body (11) toward the direction of the box body (2) and / or toward the direction away from the box body (2).

4. The cover plate structure as described in claim 2, characterized in that, The flange structure (121) extends away from the cover body (11) at one end in a direction away from the box body (2); the flange structure (121) is arranged around the edge of the cover body (11), and the flange structure (121) is provided with a drain outlet (12a) at the lower edge of the cover body (11).

5. The cover plate structure as described in claim 2, characterized in that, The reinforcing structure (12) also includes reinforcing ribs (122) protruding or recessed on the cover plate body (11).

6. The cover plate structure as described in any one of claims 1-5, characterized in that, The first mounting hole (11a) is provided in multiple ways, and the center distance between any two first mounting holes (11a) with the closest center distance is less than or equal to the preset hole distance.

7. The cover plate structure as described in any one of claims 1-5, characterized in that, The cover plate body (11) has a positioning groove (11b) on the side opposite to the box body (2) for attaching a high voltage mark (51).

8. A high-voltage junction box, characterized in that, The device includes a box body (2), an annular sealant layer (3), and a cover structure (1) as described in any one of claims 1 to 7. The box body (2) has an annular sealing groove (21) at its edge, and a plurality of second mounting holes that are spaced around the sealing groove (21) and are adapted to the first mounting holes (11a) on the cover body (11) of the cover structure (1). The cover body (11) and the box body (2) are detachably connected at the first mounting holes (11a) and the second mounting holes by fasteners (4). The sealant layer (3) is disposed in the sealing groove (21).

9. The high-voltage junction box as described in claim 8, characterized in that, The distance between the sealant layer (3) and the edge of the sealing groove (21) is greater than or equal to a preset distance.

10. A motor controller, characterized in that, Includes the cover structure (1) as described in any one of claims 1 to 7, or the high-voltage junction box as described in claim 8 or 9.

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