Power converter and power system

Abstract

The application discloses a power converter and a power system, and belongs to the technical field of power electronics. The power converter comprises a shell, the shell comprises a box body and a cover body, the box body defines a mounting space, and has an opening communicating with the mounting space, and the cover body blocks the opening and is provided with a through hole communicating with the mounting space; a fixing piece is arranged in the box body and is provided with a fixing portion at one end facing the cover body; a connecting piece is arranged in the through hole and is connected with the fixing portion to fix the cover body between the connecting piece and the fixing piece; at least one of the cover body, the fixing piece and the connecting piece is provided with a piercing structure extending towards the adjacent one.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and in particular to a power converter and power system. Background Technology

[0002] A power converter is an electronic device used to change the form or parameters of electrical energy. Its main function is to convert one form of electrical energy (such as voltage, current, frequency, AC / DC, etc.) into another to meet the power needs of different devices or systems. In the assembly structure of a power converter, the metal housing is usually composed of a box and a cover, which must be reliably electrically connected to form a grounding path.

[0003] However, during actual assembly, an oxide film layer forms in the shielded area of ​​the cover, preventing the metal body between the cover and the housing from effectively making contact and conducting electricity. This results in the housing not being able to form a grounding path, increasing the risk of leakage and electromagnetic interference. Utility Model Content

[0004] This application provides a power converter and power system to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a power converter is provided, the power converter comprising: The housing includes a box and a cover, the box defining an installation space and having an opening communicating with the installation space, and the cover sealing the opening and having a through hole communicating with the installation space. The fastener is located inside the box, and a fixing part is provided at the end facing the cover; A connector, passing through the through hole and mating with the fixing part, secures the cover between the connector and the fixing part; wherein, At least one of the cover, fastener, and connector is provided with a piercing structure extending toward the adjacent one. In some embodiments of this application, the fixing part includes an internal threaded hole, and the connecting member includes: Fastener, comprising a connected head and a shank, the shank passing through a through hole and threadedly connected to an internally threaded hole; A gasket is fitted around the outer periphery of the rod and sandwiched between the head and the cover. The puncture structure is located on the end face of the gasket facing the cover and extends toward the cover.

[0006] In some embodiments of this application, the puncture structure is disposed on the end face of the fastener facing the cover and extends toward the cover; and / or, the puncture structure is disposed on the end face of the cover facing the fastener and extends toward the fastener.

[0007] In some embodiments of this application, the power converter further includes: The puncturing element is disposed on the end face of the fixing element facing the cover, and the puncturing structure is disposed on the puncturing element and extends toward the cover.

[0008] In some embodiments of this application, a receiving groove is provided on the end face of the fixing member facing the cover. The receiving groove is located on the outer periphery of the fixing part, the piercing member is located in the receiving groove, and at least a portion of the piercing structure extends out of the receiving groove.

[0009] In some embodiments of this application, the power converter further includes: A sealing structure is provided around the outer periphery of the fixing part to seal and connect the fixing parts and the cover.

[0010] In some embodiments of this application, a mounting groove is provided on the end face of the fixing member facing the cover, the mounting groove surrounds the outer periphery of the fixing part, and the sealing structure includes a sealing ring, which is embedded in the mounting groove.

[0011] In some embodiments of this application, the puncture structures are multiple and arranged around the central axis of the through hole.

[0012] In some embodiments of this application, the extended end of the piercing structure is a piercing tip; when the connector and the fixing part are connected, the piercing tip pierces into the fixing part or the cover body.

[0013] In some embodiments of this application, the wall of the through hole is provided with a plurality of spaced notches, and the portion of the cover between two adjacent notches is bent toward the fastener to form a puncture structure.

[0014] In some embodiments of this application, the piercing structure includes a first cutting edge and a second cutting edge, both of which are inclined relative to the central axis of the through hole, and their inclination directions intersect to form a cutting edge.

[0015] In some embodiments of this application, the cover is provided with a groove, a through hole passes through the bottom of the groove, and at least a portion of the connector is received in the groove.

[0016] In some embodiments of this application, a connecting portion is provided at the end of the fixing member away from the cover. The connecting portion protrudes in a direction away from the center of the fixing member. The power converter also includes a mounting member that connects the connecting portion and the housing.

[0017] According to a second aspect of this application, an electric power system is provided, the electric power system comprising: The power converter described in any of the above technical solutions.

[0018] In the power converter of this application embodiment, the above-described technical solution provides a piercing structure extending toward the adjacent component on at least one of the cover, the fixing member, and the connector. This piercing structure, through the axial pressure generated when the connector is fixed, acts on the contact area between the cover and the fixing member, piercing the oxide film layer in that area. After piercing, the metal bodies of the cover and the fixing member are exposed and, under the axial pressure of the connector, make tight contact, forming a grounding path. This ensures reliable grounding of the housing, improves the electrical safety performance of the power converter, reduces the risk of leakage or electromagnetic interference, and enhances the reliability of the power converter's operation.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is an exploded view of a power converter provided in an embodiment of this application; Figure 2 This is an exploded view of yet another power converter provided in the embodiments of this application; Figure 3 This is a perspective view of a connector in a power converter provided in an embodiment of this application; Figure 4 This is a perspective view of a fixing component in a power converter provided in an embodiment of this application; Figure 5 This is a perspective view of a fixing component in another power converter provided in the embodiments of this application; Figure 6 Figure 2 An enlarged schematic diagram of part A in the middle; Figure 7 This is a perspective view of a fixing component in another power converter provided in the embodiments of this application; Figure 8 This is a partial cross-sectional view of a power converter provided in an embodiment of this application; Figure 9 This is a partial cross-sectional view of yet another power converter provided in the embodiments of this application; Figure 10This is a partial cross-sectional view of another power converter provided in the embodiments of this application; Figure 11 This is a perspective view of the cover in another power converter provided in the embodiments of this application; Figure 12 yes Figure 11 Enlarged schematic diagram of part B; Figure 13 yes Figure 1 An enlarged schematic diagram of section C.

[0022] Explanation of reference numerals in the attached figures: 1-Shell; 11-Box; 111-Installation space; 112-Opening; 113-Bottom plate; 114-Side plate; 1141-First plate; 1142-Second plate; 1143-Bent plate; 12-Cover; 121-Through hole; 122-Notch; 123-Groove; 2-Fixing component; 21-Fixing part; 22-Receiving groove; 23-Mounting groove; 24-Connecting part; 241-Mounting hole; 3-Connecting component; 31-Fastener; 311-Head; 312-Rod; 32-Gasket; 4-Piercing structure; 41-First cutting edge; 42-Second cutting edge; 43-Cutting edge; 5-Piercing component; 6-Sealing structure; 7-Installation component. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] This application provides a power converter and a power system, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0028] A power converter is an electronic device used to change the form or parameters of electrical energy. Its main function is to convert one form of electrical energy (such as voltage, current, frequency, AC / DC, etc.) into another to meet the power needs of different devices or systems. In the assembly structure of a power converter, the metal housing is usually composed of a box and a cover, which must be reliably electrically connected to form a grounding path.

[0029] However, during actual assembly, an oxide film layer forms in the shielded area of ​​the cover, preventing the metal body between the cover and the housing from conducting electricity. This results in the housing not being able to form a grounding path, increasing the risk of leakage and electromagnetic interference.

[0030] Please refer to Figure 1 , Figure 2 and Figure 3 The power converter provided in this application includes a housing 1, a fixing member 2, and a connector 3. The housing 1 includes a box 11 and a cover 12. The box 11 defines an installation space 111 and has an opening 112 communicating with the installation space 111. The cover 12 seals the opening 112 and is provided with a through hole 121 communicating with the installation space 111. The fixing member 2 is disposed inside the box 11, and a fixing part 21 (see reference numerals) is provided at one end facing the cover 12. Figure 4 The connector 3 passes through the through hole 121 and is connected to the fixing part 21 to clamp and fix the cover 12 between the connector 3 and the fixing part 2. At least one of the cover 12, the fixing part 2 and the connector 3 is provided with a piercing structure 4 extending toward the adjacent one.

[0031] During assembly and use, the presence of oxide film in the shielded area of ​​the cover 12 of the power converter housing 1 can hinder direct contact and conductivity between the metal bodies of the cover 12 and the fixing member 2, preventing the housing 1 from forming a grounding path. Therefore, this application provides a piercing structure 4 extending towards the adjacent one on at least one of the cover 12, the fixing member 2, and the connector 3. This piercing structure 4 can pierce the oxide film layer in the contact area between the cover 12 and the fixing member 2 through the axial pressure generated when the connector 3 is fixed. After piercing, the metal bodies of the cover 12 and the fixing member 2 are exposed and make tight contact under the axial pressure of the connector 3, forming a grounding path. This ensures reliable grounding of the housing 1, improves the electrical safety performance of the power converter, reduces the risk of leakage or electromagnetic interference, and enhances the reliability of the power converter operation.

[0032] Please combine Figure 1 , Figure 3 and Figure 4 The fixing part 21 includes an internally threaded hole, and the connecting part 3 includes a fastener 31 and a washer 32. The fastener 31 includes a connected head 311 and a rod 312, the rod 312 passing through the through hole 121 and threadedly connected to the internally threaded hole. The washer 32 is sleeved on the outer periphery of the rod 312 and clamped between the head 311 and the cover 12. The piercing structure 4 is provided on the end face of the washer 32 facing the cover 12 and extends toward the cover 12, ensuring that the piercing action of the piercing structure 4 is concentrated in the critical area of ​​metal contact, effectively breaking the insulation barrier, so that the cover 12 and the metal body of the fixing part 2 are fully exposed and in close contact. In addition, by integrating the piercing structure 4 onto the washer 32, the dual functions of piercing and clamping can be achieved without changing the existing assembly sequence or adding new parts, simplifying the overall structural design and assembly process of the power converter and improving production efficiency. Specifically, the piercing structure 4 is directly set on the end face of the gasket 32 ​​facing the cover 12. When the fastener 31 is tightened, the gasket 32 ​​moves towards the cover 12 along with the fastener 31. The piercing structure 4 on its end face can accurately act on the contact area between the cover 12 and the fastener 2, directly piercing the insulating oxide film layer formed in that area.

[0033] Please refer to Figure 5 The piercing structure 4 is integrated into the fixing piece 2 facing the cover 12 (see label). Figure 1 It extends from the end face of the cover 12 towards the cap 12. Please refer to... Figure 6 The piercing structure 4 is integrated on the end face of the cover 12 facing the fixing member 2 and extends toward the fixing member 2. In some embodiments not shown in the accompanying drawings of this application, in Figure 6 In the illustrated embodiment, a piercing structure 4 can also be provided on the end face of the fixing member 2 facing the cover 12. Of course, in Figure 5 and Figure 6In the embodiment shown, the connector 3 may or may not have the piercing structure 4 integrated on it.

[0034] The fastener 2 and the cover 12 are essential components in the assembly of the power converter housing 1. This application integrates the piercing structure 4 with at least one of them into a single structure, which not only reduces the number of parts and simplifies the assembly process, but also improves the production efficiency of the power converter. Furthermore, the piercing structure 4 is built into at least one of the fastener 2 and the cover 12, and its piercing action occurs in the sealed contact area between the cover 12 and the fastener 2 (such as the inner wall of the cover 12 and the top end face of the fastener 21). Because the piercing structure 4 is hidden inside the housing 1, it does not affect the appearance consistency of the power converter due to its external exposure, and it also avoids the risk of scratches caused by accidental contact with the piercing structure 4 during installation, maintenance, or transportation.

[0035] like Figure 7 As shown, as an example, it is similar to Figure 5 The difference in the illustrated embodiment is that the power converter also includes a piercing component 5. The piercing component 5 is disposed or installed on the side of the fixing component 2 facing the cover 12, and the piercing structure 4 is disposed on the piercing component 5 and extends towards the cover 12. The piercing component 5, as an independent component specifically designed to pierce the oxide film, can flexibly adjust its structural parameters (such as the shape, number, and distribution density of the piercing structure 4) according to the needs of actual application scenarios without modifying the main structure of the fixing component 2 or the cover 12. Only the installation step of the piercing component 5 needs to be added. This retains the versatility of the fixing component 2 and the cover 12 as the housing 1, while also adapting to the differentiated requirements for piercing performance in different scenarios through the piercing component 5, thereby improving the assembly flexibility and subsequent maintenance convenience of the power converter.

[0036] As an example, a receiving groove 22 is provided on the end face of the fixing member 2 facing the cover 12. The receiving groove 22 is located on the outer periphery of the fixing part 21, and the piercing member 5 is disposed in the receiving groove 22, with at least a portion of the piercing structure 4 extending out of the receiving groove 22. The receiving groove 22 provides positioning space for the piercing member 5, which can prevent the piercing member 5 from shifting or misaligning during transportation and assembly, ensuring that the piercing structure 4 always acts on the contact area between the cover 12 and the fixing member 2. At the same time, the piercing member 5 can be directly embedded in the receiving groove 22 of the fixing member 2 without the need for additional positioning jigs or complex alignment operations, simplifying the assembly process and reducing the difficulty of operation, thereby improving assembly efficiency and assembly consistency. For example, the aforementioned receiving groove 22 is annular and surrounds the outer periphery of the fixing part 21, and the piercing member 5 is also annular and accommodated in the receiving groove 22.

[0037] Please refer to Figure 6The power converter also includes a sealing structure 6. The sealing structure 6 surrounds the outer periphery of the fixing part 21, sealingly connecting the fixing member 2 and the cover 12. The sealing structure 6, arranged around the outer periphery of the fixing part 21, forms a sealed barrier between the fixing member 2 and the cover 12, effectively preventing moisture, dust, and other contaminants from the external environment from entering the interior of the housing 1. For example, in humid, dusty, or corrosive gas conditions, the sealing structure 6 can protect the electrical components (such as PCB boards, power devices, etc.) inside the housing 1 from corrosion, thus extending the service life and reliability of the power converter.

[0038] For example, a mounting groove 23 is provided on the end face of the fastener 2 facing the cover 12. The mounting groove 23 surrounds the outer periphery of the fastener 21, that is, the mounting groove 23 is annular. The sealing structure 6 includes a sealing ring, which is embedded in the mounting groove 23. Thus, after the sealing ring is embedded in the mounting groove 23, its position is defined by the mounting groove 23, avoiding the risk of displacement, misalignment or detachment of the sealing ring during the subsequent assembly of the cover 12 and the fastener 2, and ensuring the sealing effect of the sealing ring. At the same time, the mounting groove 23 surrounds the outer periphery of the fastener 21, making full use of the recessed space on the end face of the fastener 2, and providing a space for the sealing ring without increasing the overall size of the fastener 2.

[0039] In some embodiments not illustrated in the accompanying drawings, the end face of the fixing member 2 facing the cover 12 is provided with a mounting groove, which surrounds the outer periphery of the fixing part 21. A receiving groove is provided on the end face of the fixing member 2 facing the cover 12, located between the mounting groove and the fixing part 21. The piercing element 5 is embedded in the receiving groove, while the sealing structure 6 (such as a sealing ring or sealant) is correspondingly installed in the mounting groove 23. Thus, through the partitioned structure of the end face of the fixing member 2, both the piercing and sealing functions are integrated into the fixing member 2, thereby simplifying the overall structure of the power converter.

[0040] As an example, the sealing structure 6 can be a sealant structure. Sealant is applied to the connection 24 of the fastener 2 and the cover 12. When the fastener 2 and the cover 12 are assembled, the sealant is squeezed to form a continuous sealing film layer at the contact interface between the two. The sealing film layer surrounds the outer periphery of the fastener 21, thereby constructing a reliable sealing barrier.

[0041] like Figure 3 , Figure 5 or Figure 7 As shown, the puncture structure 4 has multiple puncture structures and surrounds the through hole 121 (refer to the reference numerals). Figure 1 The central axis of the cover 12 is set. Specifically, multiple piercing structures 4 are arranged in a ring along the central axis of the through hole 121, and through multi-point coordinated piercing, the cover 12 (see reference numerals) is pierced. Figure 1Maximizing the contact area between the cover 12 and the metal body of the fastener 2 is beneficial to improving the stability and reliability of the grounding of the housing 1. At the same time, the annularly distributed puncture structure 4, through multi-point synchronous action, makes the contact area between the cover 12 and the fastener 2 more evenly stressed, which not only avoids material damage caused by excessive stress on a single puncture point, but also prevents poor local contact caused by uneven pressure.

[0042] The extended end of the piercing structure 4 is the piercing tip. When the connector 3 and the fixing part 21 are connected, the piercing tip penetrates the fixing part 2 or the cover 12. Thus, when the piercing structure 4 moves towards the cover 12 as the connector 3 is tightened, the piercing tip can easily pierce the oxide film formed in the spray shielding area of ​​the cover 12 or the contact surface of the fixing part 2. At the same time, the small contact area of ​​the piercing tip can reduce the axial force required in the initial stage of piercing, thereby reducing the load requirement on the connector 3 (such as the fastener 31) and reducing the risk of deformation of the cover 12 or the fixing part 2 during assembly.

[0043] Specifically, such as Figure 8 As shown, when the piercing structure 4 is provided on the end face of the gasket 32 ​​facing the cover 12 and extends toward the cover 12, and the connector 3 is connected to the fixing part 21, the piercing tip penetrates into the cover 12. Figure 9 As shown, when the piercing structure 4 is provided on the cover 12 and extends toward the cover 12, and the connecting member 3 is connected to the fixing part 21, the piercing tip penetrates into the fixing part 2. Figure 10 As shown, when the piercing structure 4 is provided on the end face of the fixing member 2 facing the cover 12 and extends toward the cover 12, and the connecting member 3 is connected to the fixing part 21, the piercing tip pierces into the cover 12.

[0044] Please combine Figure 11 and Figure 12 The through-hole 121 has multiple spaced notches 122 on its wall. The portion of the cover 12 located between two adjacent notches 122 bends towards the fixing member 2 to form a piercing structure 4, achieving an integrated structure of the piercing function and the cover 12 body. Simultaneously, the piercing structure 4 of the bent structure can be completed synchronously with other processing steps of the cover 12 (such as stamping and bending), which can be achieved using existing production processes without introducing new specialized equipment or complex tooling, thereby reducing manufacturing costs and improving overall assembly efficiency. The spaced distribution of the notches 122 provides a positioning reference for the local bending of the cover 12, allowing the piercing structure 4 formed by bending to be precisely arranged in a ring around the central axis of the through-hole 121. The piercing structure 4 formed by bending maintains material continuity with the cover 12 body, and its root connects to the cover 12 body. During the fastening process of the connecting member 3, the axial pressure on the piercing structure 4 is distributed and transmitted at its root, avoiding deformation of the cover 12 caused by local stress concentration.

[0045] Specifically, the piercing structure 4 includes a first cutting edge 41 and a second cutting edge 42. Both the first cutting edge 41 and the second cutting edge 42 are inclined relative to the central axis of the through hole 121, and their inclination direction forms a cutting edge 43. That is, a sharp V-shaped or wedge-shaped piercing tip is formed at the intersection of the first cutting edge 41 and the second cutting edge 42. The inclined design of the first cutting edge 41 and the second cutting edge 42 forms a progressive piercing path. During the fastening process of the connector 3, the piercing structure 4 gradually increases the piercing depth through the progressive contact between the cutting edge and the oxide film. The synergistic effect of the first cutting edge 41 and the second cutting edge 42 disperses the piercing force in two directions, ensuring that the oxide film is completely removed while avoiding excessive impact on the lower fixing member 2.

[0046] Please continue to refer to Figure 8 The cover 12 has a groove 123, and a through hole 121 penetrates the bottom of the groove 123. At least a portion of the connector 3 is accommodated within the groove 123. Therefore, during transportation, assembly, or use, the groove 123 effectively blocks external impacts, vibrations, or accidental collisions from directly affecting the connector 3, reducing the risk of loosening, deformation, or damage to the connector 3 and ensuring the long-term reliability of its fastening function. Both the connector 3 and the fixing member 2 are conductive, forming a grounding path from the cover 12 through the connector 3 to the fixing member 2, and then extending to the housing 11.

[0047] Please refer to Figure 1 , Figure 4 and Figure 13 The fixing member 2, at its end opposite to the cover 12, is also provided with a connecting portion 24, which protrudes away from the center of the fixing member 2. The power converter also includes a mounting member 7, which is used to connect the connecting portion 24 and the housing 11. The fixing member 2 forms a rigid connection with the housing 11 through the connecting portion 24. During vibration, impact, or long-term use, the relative position between the housing 11, the fixing member 2, and the cover 12 is more stable, reducing the risk of loosening or deformation of the connection due to mechanical stress.

[0048] Exemplarily, the enclosure 11 includes a bottom plate 113 and side panels 114, which are connected to form an installation space 111. The side edge of the side panel 114 away from the bottom plate 113 forms an opening 112. The side panel 114 has a first plate portion 1141 and a second plate portion 1142, and a bent plate portion 1143 connecting the first plate portion 1141 and the second plate portion 1142. One end of the first plate portion 1141 away from the second plate portion 1142 is connected to the bottom plate 113, and the end of the second plate portion 1142 away from the first plate portion 1141 forms the opening 112. The bent plate portion 1143 is parallel to the bottom plate 113 and extends outward from the enclosure 11. The end face of the bent plate portion 1143 facing the opening 112 carries a fixing member 2 to form a load-bearing structure.

[0049] For example, the mounting component 7 is a screw or bolt, and the connecting part 24 is provided with a mounting hole 241. The mounting component 7 passes through the mounting hole 241 on the connecting part 24 and is threadedly connected to the bent plate part 1143.

[0050] The bent plate 1143, together with the base plate 113, the first plate 1141, and the second plate 1142, forms a multi-layered stepped reinforcement structure. This enhances the deformation resistance of the side area of ​​the enclosure 11, distributing localized high pressure evenly across a wider area of ​​the enclosure 11 wall. This prevents the enclosure 11 from cracking due to stress concentration at a single point, ensuring that the enclosure 11 maintains its structural integrity even under certain explosive pressure. Furthermore, the stretching process requires multiple progressive stretching steps to prevent the metal sheet from cracking due to excessive local stretching. For example, the first plate 1141 is stretched to form the connection area between the base plate 113, and then the bent plate 1143 and the second plate 1142 are gradually stretched. This ensures that the deformation amount during each stretching is controlled within the material's allowable range, reducing the difficulty of the stretching process.

[0051] In some embodiments of this application, a power system is also provided, which includes a power converter as described in any of the above technical solutions. Since the power converter in this power system and the power converter in the above technical solutions have the same technical features, they can solve the same technical problems and achieve the same technical effects.

[0052] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0053] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims. Furthermore, specific examples have been used in the specification to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application, and the content of this specification should not be construed as a limitation of this application.

Claims

1. A power converter, characterized in that, include: The housing includes a box and a cover, the box defining an installation space and having an opening communicating with the installation space, and the cover sealing the opening and having a through hole communicating with the installation space; A fastener is provided inside the box, and a fixing part is provided at one end facing the cover; A connector, passing through the through hole and engaging with the fixing part, secures the cover between the connector and the fixing part; wherein, At least one of the cover, the fastener, and the connector is provided with a piercing structure extending toward the adjacent one.

2. The power converter according to claim 1, characterized in that, The fixing part includes an internal threaded hole, and the connecting member includes: Fastener, comprising a connected head and a shank, the shank passing through the through hole and threadedly connected to the internal threaded hole; A gasket is fitted around the outer periphery of the rod and sandwiched between the head and the cover. The puncturing structure is disposed on the end face of the gasket facing the cover and extends toward the cover.

3. The power converter according to claim 1, characterized in that, The piercing structure is disposed on the end face of the fastener facing the cover and extends toward the cover; and / or, the piercing structure is disposed on the end face of the cover facing the fastener and extends toward the fastener.

4. The power converter according to claim 1, characterized in that, The power converter also includes: A piercing element is disposed on the end face of the fixing member facing the cover, and the piercing structure is disposed on the piercing element and extends toward the cover.

5. The power converter according to claim 4, characterized in that, The fixing member has a receiving groove on its end face facing the cover. The receiving groove is located on the outer periphery of the fixing part. The piercing member is located in the receiving groove, and at least a portion of the piercing structure extends out of the receiving groove.

6. The power converter according to claim 1, characterized in that, The power converter also includes: A sealing structure is provided around the outer periphery of the fixing part, sealingly connecting the fixing member and the cover.

7. The power converter according to claim 6, characterized in that, The fixing member has a mounting groove on its end face facing the cover. The mounting groove surrounds the outer periphery of the fixing part. The sealing structure includes a sealing ring, which is embedded in the mounting groove.

8. The power converter according to any one of claims 1 to 7, characterized in that, The puncture structure has multiple components and is arranged around the central axis of the through hole.

9. The power converter according to claim 8, characterized in that, The extended end of the piercing structure is a piercing tip; when the connector and the fixing part are connected, the piercing tip pierces into the fixing part or the cover body.

10. The power converter according to claim 1, characterized in that, The through hole has multiple spaced notches on its wall, and the portion of the cover between two adjacent notches is bent toward the fastener to form the puncture structure.

11. The power converter according to claim 10, characterized in that, The piercing structure includes a first cutting edge and a second cutting edge, both of which are inclined relative to the central axis of the through hole, and their inclination directions intersect to form a cutting edge.

12. The power converter according to claim 1, 10, or 11, characterized in that, The cover has a groove, the through hole extends through the bottom of the groove, and at least a portion of the connector is housed within the groove.

13. The power converter according to claim 1, characterized in that, The fixing member is provided with a connecting part at the end opposite to the cover. The connecting part protrudes in a direction away from the center of the fixing member. The power converter also includes a mounting member that connects the connecting part and the housing.

14. An electric power system, characterized in that, The power system includes: The power converter as described in any one of claims 1 to 13.

Images