Energy storage inverter structure

Abstract

An embodiment of the utility model discloses an energy storage inverter structure which comprises a box body, an upper cover, a first sealing ring, a sealing element, a first connecting piece, a radiator and a transformer assembly, a pressing rivet nut column is fixed on the inner side of the box body, a pressing rivet piece with a counterbore is fixed on the upper cover, the first sealing ring is connected between the box body and the upper cover, and the sealing element is connected between the first sealing ring and the upper cover. The sealing element is arranged between the pressing rivet piece and the pressing rivet nut column, a rod body of the first bolt sequentially penetrates through the pressing rivet piece and the sealing element and then is connected with the pressing rivet nut column in a matched mode to seal and lock the upper cover and the box body, the far end face of the pressing rivet piece is flush with the far end face of the upper cover, and the head of the first bolt is embedded into the counterbore. According to the energy storage inverter structure, the energy storage inverter structure can be operated and maintained from the front on the premise that the appearance is not affected, the operation is more visual, simpler and more convenient, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, specifically relates to a kind of energy storage inverter structure. BACKGROUND

[0002] In the energy storage system industry chain, energy storage inverter plays an indispensable role.As the key device connecting battery system and power grid, energy storage inverter realizes the bidirectional conversion of electric energy: it can not only convert the direct current of storage battery into alternating current for merging into power grid or directly supporting alternating current load;It can also perform the opposite operation, i.e., converting the alternating current provided by the power grid into direct current for charging the storage battery.Energy storage inverter integrates the functions of photovoltaic grid-connected power generation and energy storage power station, which enables it not only to cope with the instability of photovoltaic power generation caused by weather changes, thereby improving the quality of power grid;And by storing electric energy during the low valley period of power demand and releasing this energy during the peak period, it can significantly reduce the power generation pressure during the peak period of power grid, expand the capacity of power grid, and thus improve the efficiency of power grid.

[0003] However, some energy storage inverters on the market have design deficiencies.For example, in order to pursue simple and beautiful appearance, some products adopt the design of installing the upper cover without screws on the front, i.e., all mounting screws are located on the back of the equipment.Such design improves the appearance of the product, but also increases the difficulty of disassembly and maintenance for users. UTILITY MODEL CONTENT

[0004] Therefore, the utility model embodiment provides an energy storage inverter structure which can be operated and maintained from the front without affecting the appearance, is more intuitive and convenient, and reduces the maintenance cost.

[0005] The utility model embodiment provides an energy storage inverter structure, which comprises:

[0006] A box body has a plurality of press-in nut columns fixed inside;

[0007] An upper cover is provided with a plurality of through holes, each of which is fixed with a press-in part having a countersunk hole, the distal end surface of the press-in part is flush with the distal end surface of the upper cover, and the proximal end surface of the press-in part protrudes from the proximal end surface of the upper cover;

[0008] A first sealing ring is sealingly connected between the box body and the upper cover;

[0009] A sealing element is arranged between the press-in part and the press-in nut column;

[0010] A plurality of first connecting members are a plurality of first bolts, a shank of each of the first bolts is sequentially inserted through the pressure rivet and the sealing element and then is connected with the pressure nut column to seal and lock the upper cover and the box body, and a head of the first bolt is embedded in the countersunk hole;

[0011] A heat sink is detachably and sealingly connected below the box body;

[0012] A transformer assembly is detachably and sealingly connected on the heat sink.

[0013] Optionally, the sealing element comprises a sealing gasket and a sealing sleeve arranged around an edge of the sealing gasket, the sealing gasket is provided with a mounting hole, the sealing gasket is arranged between a proximal end surface of the pressure rivet and a distal end surface of the pressure nut column, and the sealing sleeve is arranged around an outer side of the pressure nut column.

[0014] Optionally, at least two opposite side edges of the opening of the box body are provided with a first flange extending in a horizontal direction, an edge of the first flange is further provided with a second flange, the second flange is folded towards a distal end, an edge of the second flange is flush with a height of the other side edge of the opening of the box body, and the pressure nut column is fixed on the first flange.

[0015] Optionally, an annular connecting groove is formed in the first sealing ring, an opening of the connecting groove is downward, a top edge of the box body is inserted into the connecting groove, and the first bolt is located inside the first sealing ring.

[0016] Optionally, the first sealing ring comprises:

[0017] A first sealing part is internally provided with a deformation cavity, one side of the deformation cavity is provided with an exhaust hole in communication with the outside;

[0018] A second sealing part is connected below the first sealing part, a hardness of the second sealing part is greater than a hardness of the first sealing part, the connecting groove is arranged on the second sealing part, an inner wall of the connecting groove is provided with a guide strip extending upwardly and obliquely, and an outer side surface of the guide strip, the inner wall of the connecting groove and an outer side surface of the first sealing ring are provided with an electromagnetic shielding layer in communication;

[0019] The box body and the upper cover are conductively connected through the electromagnetic shielding layer.

[0020] Optionally, an annular first sealing groove is formed in the heat sink, a first sealing strip is arranged in the first sealing groove, an annular second sealing groove is formed in the transformer assembly, and a second sealing strip is arranged in the second sealing groove.

[0021] Optionally, at least part of the outer side of the first sealing strip is provided with a first metal conductive layer, and the box and the heat sink are sealingly connected through the first sealing strip and conductively connected through the first metal conductive layer.

[0022] At least part of the outer side of the second sealing strip is provided with a second metal conductive layer, and the transformer assembly and the heat sink are sealingly connected through the second sealing strip and conductively connected through the second metal conductive layer.

[0023] Optionally, the first sealing strip and the second sealing strip are the same structure, and the first sealing strip and the second sealing strip are both internally provided with a cavity, and the top end of the first sealing strip and the second sealing strip are both provided with two arc-shaped sealing parts.

[0024] Optionally, the edge of the upper cover is provided with a third flange, and the third flange is folded towards the proximal end to shield the gap between the box and the upper cover and the first sealing ring.

[0025] Optionally, the heat sink and the box are detachably connected through a plurality of second connecting pieces, the transformer assembly and the heat sink are detachably connected through a plurality of third connecting pieces, the second connecting pieces include second bolts, the third connecting pieces include third bolts, the rod body of the second bolt is threadedly connected with the heat sink through the bottom wall of the box to lock the box and the heat sink, the rod body of the third bolt is threadedly connected with the transformer assembly through the bottom wall of the heat sink to lock the transformer assembly and the heat sink, and the second bolt is located inside the first sealing strip and the third bolt is located inside the second sealing strip.

[0026] The energy storage inverter structure of the embodiment comprises a box, an upper cover, a first sealing ring, a sealing element, a first connecting piece, a heat sink and a transformer assembly, the inside of the box is fixed with a press-in nut column, the upper cover is fixed with a press-in element with a countersunk hole, the first sealing ring is connected between the box and the upper cover, the sealing element is arranged between the press-in element and the press-in nut column, the rod body of the first bolt is sequentially connected with the press-in nut column through the press-in element and the sealing element to sealingly lock the upper cover and the box, the distal end surface of the press-in element is flush with the distal end surface of the upper cover, and the head of the first bolt is embedded in the countersunk hole. The energy storage inverter structure can be operated and maintained from the front without affecting the appearance, is more intuitive and convenient, and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application, taken in conjunction with the accompanying drawings, in which:

[0028] Figure 1is a structure schematic view of the first perspective of the energy storage inverter structure of the embodiment of the utility model;

[0029] Figure 2 is a structure schematic view of the second perspective of the energy storage inverter structure of the embodiment of the utility model;

[0030] Figure 3 is an explosion schematic view of the energy storage inverter structure of the embodiment of the utility model;

[0031] Figure 4 is the first cross section schematic view of the energy storage inverter structure of the embodiment of the utility model;

[0032] Figure 5 is Figure 4 the A-A partial cross section schematic view of the energy storage inverter structure in it;

[0033] Figure 6 is the cross section schematic view of the first sealing ring of the embodiment of the utility model;

[0034] Figure 7 is Figure 4 the B-B partial cross section schematic view of the energy storage inverter structure in it;

[0035] Figure 8 is the cross section schematic view of the first sealing strip and the second sealing strip of the embodiment of the utility model;

[0036] Figure 9 is the second cross section schematic view of the energy storage inverter structure of the embodiment of the utility model;

[0037] Figure 10 is Figure 9 the C-C partial cross section schematic view of the energy storage inverter structure in it.

[0038] Reference signs:

[0039] 1-box;11-first flanging;12-second flanging;2-upper cover;21-third flanging;22-through hole;3-first sealing ring;31-electromagnetic shielding layer;32-connecting groove;33-conductor;34-first sealing part;341-deformation cavity;342-exhaust hole;343-elastic contact strip;35-second sealing part;4-radiator;41-first sealing groove;5-first sealing strip;51-first metal conductive layer;6-transformer assembly;61-second sealing groove;7-second sealing strip;71-second metal conductive layer;8-cavity;81-arc sealing part;91-pressure rivet nut column;92-pressure riveting piece;921-counter sunk hole;93-first bolt;94-sealing element;941-sealing gasket;942-sealing sleeve;10-second connecting piece;100-third connecting piece. DETAILED DESCRIPTION

[0040] The present application is described in detail below based on examples, but the present application is not limited to only these examples. In the following detailed description of the present application, some specific details are described in detail. The present application can also be fully understood without the description of these details. In order to avoid confusion of the essence of the present application, the well-known methods, processes, flows, elements and circuits are not described in detail.

[0041] In addition, those skilled in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0042] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. The above-mentioned terms in the present application can be understood according to the specific meaning of the specific circumstances by those skilled in the art.

[0043] Unless the context clearly requires otherwise, the "includes", "contains", and similar words in the entire application file should be interpreted as containing meaning rather than exclusive or exhaustive meaning; that is, as "including but not limited to" meaning.

[0044] In the description of the present application, it should be understood that the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0045] Figures 1-4 is a structural schematic diagram of the energy storage inverter structure of the embodiment. As shown in Figures 1-4 The energy storage inverter structure includes a box body 1, an upper cover 2, a radiator 4 and a transformer assembly 6. The upper cover 2 is detachably connected above the box body 1, used to seal the top of the box body 1; the radiator 4 is detachably connected below the box body 1, used to seal the bottom of the box body 1; the transformer assembly 6 is detachably connected on the radiator 4, so that the entire inverter structure is completely sealed.

[0046] In the present embodiment, the box body 1, the upper cover 2, the radiator 4 and the transformer assembly 6 are made of metal. The shell made of metal has electromagnetic shielding performance, which can ensure that the formed energy storage inverter structure has high electromagnetic compatibility performance, and has the same electrical performance and modeling richness as metal die casting.

[0047] The first sealing ring 3 is arranged between the box body 1 and the upper cover 2, and the upper cover 2 and the box body 1 are detachably connected through a plurality of first connecting pieces. During the compression connection of the upper cover 2 and the box body 1 through the plurality of first connecting pieces, the first sealing ring 3 is extruded to elastically deform and tightly abut the upper cover 2 and the box body 1, so that the upper cover 2 and the box body 1 are sealed, and the waterproof and dustproof effects of the top of the box body 1 are achieved.

[0048] In the embodiment, a plurality of press-in nut columns 91 are fixed to the inner side of the box body 1, and a plurality of through holes 22 are arranged on the upper cover 2, as shown in Figure 3 The arrangement mode of the plurality of press-in nut columns 91 is the same as that of the plurality of through holes 22, and the plurality of press-in nut columns 91 and the plurality of through holes 22 are arranged one by one in correspondence. Each through hole 22 is fixed with a press-in piece 92, and the press-in piece 92 has a countersunk hole 921. The first connecting piece is a first bolt 93. The rod body of the first bolt 93 is connected with the press-in nut column 91 in a matched mode through the press-in piece 92, so as to lock the upper cover 2 and the box body 1. The head of the first bolt 93 is located on the front side of the energy storage inverter structure, which is convenient for operation and maintenance.

[0049] As shown in Figure 10 , the distal end surface of the press-in piece 92 is flush with the distal end surface of the upper cover 2, and the proximal end surface of the press-in piece 92 protrudes from the proximal end surface of the upper cover 2, so that the countersunk hole 921 has a sufficient depth to accommodate the head of the first bolt 93. After the upper cover 2 and the box body 1 are locked, the head of the first bolt 93 is embedded in the countersunk hole 921 and does not protrude from the distal end surface of the upper cover 2, which improves the appearance of the energy storage inverter structure, realizes front operation and maintenance, and reduces maintenance cost.

[0050] Further, a sealing element 94 is arranged between the press-in piece 92 and the press-in nut column 91, as shown in Figure 10 After the upper cover 2 and the box body 1 are locked, the rod body of the first bolt 93 is connected with the press-in nut column 91 in a matched mode through the countersunk hole 921 and the sealing element 94 in sequence, so as to seal and lock the upper cover 2 and the box body 1. The sealing element 94 can prevent rainwater from entering the box body 1 from the connection of the first bolt 93, and can play a sealing role.

[0051] In some embodiments, the sealing element 94 includes a sealing gasket 941 and a sealing sleeve 942 arranged around the edge of the sealing gasket 941, the sealing gasket 941 is provided with a mounting hole, the sealing gasket 941 is arranged between the proximal end surface of the press-in piece 92 and the distal end surface of the press-in nut column 91, and the sealing sleeve 942 is arranged around the outer side of the press-in nut column 91, as shown in Figure 10 The structure of the sealing element 94 can be sleeved on the press-in nut column 91 to prevent falling off.

[0052] As shown in Figure 3As shown, the opening of the box body 1 is integrally formed with a first flange 11 on at least two opposite side edges. The first flange 11 extends in the horizontal direction. The edge of the first flange 11 is integrally formed with a second flange 12 which is folded towards the distal end (i.e. the first flange 11 is perpendicular to the side wall of the box body 1). The edge of the second flange 12 is flush with the height of the other side edges of the opening of the box body 1 (i.e. the side edges without the first flange 11). The press-in nut column 91 is fixed on the first flange 11 to provide installation thickness for the first bolt 93. At the same time, the press-in nut column 91 is fixed on the first flange 11, which can improve the appearance aesthetics. In this embodiment, a plurality of press-in nut columns 91 are uniformly arranged along the first flange 11. A plurality of press-in members 92 are uniformly arranged along the box body 1 and correspond to the plurality of press-in nut columns 91 one by one.

[0053] In other optional embodiments, the four side edges of the opening of the box body 1 are integrally formed with the first flange 11 which extends in the horizontal direction. The edge of the first flange 11 is integrally formed with the second flange 12 which is folded towards the distal end. A plurality of press-in nut columns 91 are uniformly arranged along the first flange 11 in the circumferential direction. A plurality of press-in members 92 are uniformly arranged along the box body 1 in the circumferential direction and correspond to the plurality of press-in nut columns 91 one by one.

[0054] In this application, "proximal end" means the end close to the heat sink 4; "distal end" means the end away from the heat sink 4. For example, Figure 1 and Figure 4 the lower side of Figure 1 and Figure 4 is the proximal end, Figure 1 and Figure 4 the upper side is the distal end.

[0055] In this embodiment, the first sealing ring 3 is provided with an annular connecting groove 32. The opening of the connecting groove 32 is downward, as shown in Figure 6 . The size and shape of the annular connecting groove 32 match the size and shape of the top end of the box body 1, so that the top end of the box body 1 (i.e. the edge of the second flange 12 and the flush other side edges) can be inserted into the connecting groove 32. The connection between the first sealing ring 3 and the box body 1 can prevent the first sealing ring 3 from being extruded out of position during the connection between the upper cover 2 and the box body 1, thereby improving the sealing performance of the connection.

[0056] In some embodiments, the inner wall of the connecting groove 32 is provided with a guide strip 33, as shown in Figure 6The guide bars 33 can assist the first sealing ring 3 to be clamped on the box body 1, and avoid the first sealing ring 3 from shaking and falling off the box body 1. The number of the guide bars 33 can be set according to requirements, and is not limited specifically. Preferably, the guide bars 33 are arranged obliquely upward, facilitating the insertion of the top of the box body 1 into the connecting groove 32, and also reversely increasing the friction between the box body 1, preventing the first sealing ring 3 from being separated from the box body 1 reversely.

[0057] In some embodiments, the first sealing ring 3 comprises a first sealing part 34 and a second sealing part 35 arranged upward and downward, as shown in Figure 6 The first sealing part 34 and the second sealing part 35 are made of the same material but have different hardness. The hardness of the second sealing part 35 is greater than that of the first sealing part 34, and the connecting groove 32 is arranged on the second sealing part 35, so that the first sealing ring 3 having a higher hardness can be clamped on the box body 1. The first sealing part 34 has a lower hardness and is located outside the top of the box body 1, used for abutting against the upper cover 2 and easily deforming to achieve a good sealing between the upper cover 2 and the box body 1.

[0058] Optionally, the first sealing part 34 is provided with a deformation cavity 341, and one side of the deformation cavity 341 is provided with an exhaust hole 342 communicating with the outside, as shown in Figure 6 The deformation cavity 341 is used for providing space for the deformation of the first sealing part 34, and the exhaust hole 342 is used for exhausting the deformation cavity 341, so that the first sealing part 34 has a better sealing effect when being pressed. The side wall of the second sealing part 35 can also be provided with a cavity and an opening according to requirements. In other optional embodiments, the first sealing part 34 can be a solid structure.

[0059] In some embodiments, the top end of the first sealing part 34 is provided with two elastic contact strips 343, and the two elastic contact strips 343 respectively extend obliquely upward towards the left and right sides of the first sealing part 34, as shown in Figure 6 That is, the two elastic contact strips 343 are symmetrically arranged outside the top end of the first sealing part 34, one elastic contact strip 343 obliquely towards the upper left, and the other elastic contact strip 343 obliquely towards the upper right. The two elastic contact strips 343 can make the upper cover 2 and the first sealing part 34 more closely connected, improving the sealing effect.

[0060] When the box body 1 and the upper cover 2 are installed, the first sealing ring 3 is tightly attached to the box body 1 and the upper cover 2, and the plurality of first bolts 93 are located inside the first sealing ring 3. The first sealing ring 3 is used for blocking the rainwater from approaching the gap between the first bolts 93 and the box body 1, avoiding the rainwater from seeping into the box body 1 through the gap between the first bolts 93 and the box body 1.

[0061] As shown in Figure 6 At least part of the outer side surface of the first sealing ring 3 is provided with an electromagnetic shielding layer 31. As shown in Figure 5As shown, after the box body 1 and the upper cover 2 are connected together, the part of the first sealing ring 3 with the electromagnetic shielding layer 31 can be in contact with the box body 1 and the upper cover 2, so that the box body 1 and the upper cover 2 can be electrically connected through the electromagnetic shielding layer 31 at the fault. The first sealing ring 3 has good sealing effect and good electromagnetic shielding function, which can prevent electromagnetic leakage and electromagnetic interference at the fault, and meet the electromagnetic compatibility requirements.

[0062] Specifically, the outer side of the elastic contact strip 343, part of the top surface and part of the side surface of the first sealing part 34, part of the outer side of the second sealing part 35, and the inner wall of the connecting groove on the same side, and the outer side of the guide strip are provided with the electromagnetic shielding layer 31 in communication. That is, one side of the first sealing ring 3 is provided with the electromagnetic shielding layer 31. One side of the electromagnetic shielding layer 31 can be extended to the inside of the connecting groove 32 and in contact with the box body 1 for electrical connection, and the other side of the electromagnetic shielding layer 31 can be extended to the top of the first sealing ring 3 and in contact with the upper cover 2 for electrical connection, thereby meeting the electromagnetic compatibility requirements and electromagnetic anti-interference requirements of the overall structure of the energy storage inverter.

[0063] In some embodiments, the entire outer side of the first sealing ring 3 and the inner wall of the connecting groove 32 are all provided with the electromagnetic shielding layer 31, and the first sealing ring 3 is electrically connected with the upper cover 2 and the box body 1 regardless of the deformation of the first sealing ring 3, thereby improving the electromagnetic compatibility effect and electromagnetic shielding effect of the energy storage inverter structure.

[0064] The electromagnetic shielding layer 31 can be formed by coating a conductive material on the surface of the first sealing ring 3, or can be formed by directly pasting a conductive patch on the surface of the first sealing ring 3. In addition, the first sealing ring 3 can also be formed of a material with conductive properties, such as foamed conductive rubber, which not only has good sealing effect, but also has good electromagnetic shielding function.

[0065] Further, the edge of the upper cover 2 is integrally formed with a third flange 21, which is folded towards the proximal end, as shown in Figure 5 . After the upper cover 2 is connected with the box body 1, the third flange 21 is parallel to the outer side of the upper cover 2 (i.e. the outer side of the second flange 12 and the outer side of the part not provided with the first flange 11), and is used to shield the gap between the box body 1 and the upper cover 2 and the first sealing ring 3.

[0066] As shown in Figure 7 and Figure 9 , a first sealing strip 5 is arranged between the box body 1 and the heat sink 4, and the box body 1 and the heat sink 4 are detachably connected through a plurality of second connecting pieces 10. During the pressing connection of the box body 1 and the heat sink 4 through the plurality of second connecting pieces 10, the first sealing strip 5 is elastically deformed to tightly abut the box body 1 and the heat sink 4, so that the box body 1 and the heat sink 4 are sealed, thereby achieving the waterproof and dustproof effects of the bottom of the box body 1.

[0067] In the embodiment, the first sealing strip 5 is internally provided with a cavity 8 for providing space for deformation of the first sealing strip 5. Optionally, one side of the cavity 8 is provided with an exhaust hole in communication with the outside for exhausting the cavity 8 so as to have better sealing effect when being pressed. In other optional embodiments, the first sealing strip 5 can be solid structure.

[0068] In some embodiments, the top end of the first sealing strip 5 is provided with two arc-shaped sealing portions 81, as shown. Figure 8 The two arc-shaped sealing portions 81 can increase the contact area with the cabinet 1, so that the cabinet 1 and the first sealing strip 5 are connected more tightly, and the sealing effect is improved.

[0069] In some embodiments, the heat sink 4 is provided with a ring-shaped first sealing groove 41, and the first sealing strip 5 is arranged in the first sealing groove 41, and the top of the first sealing strip 5 can extend out of the first sealing groove 41. When the heat sink 4 and the cabinet 1 are installed, the first sealing strip 5 is tightly attached to the cabinet 1 and the heat sink 4, the first sealing strip 5 is located outside the opening at the bottom of the cabinet 1, and the plurality of second connecting pieces 10 are located inside the first sealing strip 5 and outside the opening at the bottom of the cabinet 1, the first sealing strip 5 is used to block the rainwater from approaching the gap between the second connecting piece 10 and the cabinet 1, so as to prevent the rainwater from seeping into the cabinet 1 through the gap between the second connecting piece 10 and the cabinet 1.

[0070] The shape of the first sealing groove 41 is the same as that of the opening of the bottom wall of the cabinet 1, and surrounds the outside of the opening of the bottom wall of the cabinet 1; the shape of the first sealing strip 5 is the same as that of the first sealing groove 41, such as rectangular ring shape, circular ring shape, etc.

[0071] The second connecting piece 10 includes a second bolt. The bottom wall of the cabinet 1 is provided with a first connecting hole, and the heat sink 4 is provided with a first threaded hole located inside the first sealing groove 41 and corresponding to the first connecting hole. The rod of the second bolt is threadedly connected with the first threaded hole of the heat sink 4 through the first connecting hole of the bottom wall of the cabinet 1, so as to lock the cabinet 1 and the heat sink 4. Preferably, a plurality of second bolts are uniformly arranged along the circumference of the bottom wall of the cabinet 1.

[0072] As shown in Figure 8As shown, at least part of the outer side of the first sealing strip 5 is provided with a first metal conductive layer 51. After the box body 1 and the heat sink 4 are connected together, the part of the first sealing strip 5 with the first metal conductive layer 51 can be in contact with the box body 1 and the heat sink 4, so that the box body 1 and the heat sink 4 can be conductively connected at the fault through the first metal conductive layer 51. The first sealing strip 5 has good sealing effect and good electromagnetic shielding function, which can prevent electromagnetic leakage and electromagnetic interference at the fault and meet the electromagnetic compatibility requirements. Specifically, the outer side of an arc-shaped sealing part 81, part of the side and the bottom of the first sealing strip 5 are all provided with the first metal conductive layer 51 in communication, so that the heat sink 4 and the box body 1 are conductively connected at the fault.

[0073] In some embodiments, the entire outer side of the first sealing strip 5 is provided with the first metal conductive layer 51, which can be conductively connected with the heat sink 4 and the box body 1 regardless of the deformation of the first sealing strip 5, thereby improving the electromagnetic compatibility and electromagnetic shielding effect of the inverter structure. The first metal conductive layer 51 can be formed by coating a conductive material on the surface of the first sealing strip 5 or by directly pasting a conductive patch on the surface of the first sealing strip 5. In addition, the first sealing strip 5 can also be formed of a material with conductive properties, such as foamed conductive rubber, which not only has good sealing effect but also has good electromagnetic shielding function.

[0074] The second sealing strip 7 is arranged between the transformer assembly 6 and the heat sink 4, and the transformer assembly 6 and the heat sink 4 are detachably connected through a plurality of third connecting pieces 100. During the pressing and connecting process of the transformer assembly 6 and the heat sink 4 through the plurality of third connecting pieces 100, the second sealing strip 7 is elastically deformed to tightly abut the transformer assembly 6 and the heat sink 4, so as to seal the transformer assembly 6 and the heat sink 4 and realize the waterproof and dustproof effects of the box body 1 as a whole.

[0075] In the embodiment, the first sealing strip 5 and the second sealing strip 7 have the same structure, and the second sealing strip 7 is internally provided with a cavity 8 for providing space for the deformation of the second sealing strip 7. Optionally, one side of the cavity 8 is provided with an exhaust hole in communication with the outside for exhausting the cavity 8, so as to have better sealing effect during extrusion. In other optional embodiments, the second sealing strip 7 can have a solid structure.

[0076] In some embodiments, the top end of the second sealing strip 7 is provided with two arc-shaped sealing parts 81, as shown. Figure 8 The two arc-shaped sealing parts 81 can increase the contact area with the heat sink 4, so that the heat sink 4 and the second sealing strip 7 are more tightly connected, thereby improving the sealing effect.

[0077] In some embodiments, the transformer assembly 6 is provided with a second annular sealing groove 61, and the second sealing strip 7 is arranged in the second sealing groove 61, and the top of the second sealing strip 7 can extend out of the second sealing groove 61. When the heat sink 4 and the transformer assembly 6 are installed, the second sealing strip 7 is tightly attached to the transformer assembly 6 and the heat sink 4, the second sealing strip 7 is located outside the opening of the heat sink 4, and the plurality of third connecting members 100 are located inside the second sealing strip 7 and outside the opening of the heat sink 4, the second sealing strip 7 is used to prevent rainwater from entering the gap between the third connecting member 100 and the heat sink 4, so as to prevent rainwater from penetrating into the cabinet 1 from the gap between the third connecting member 100 and the heat sink 4. The shape of the second sealing groove 61 is the same as that of the opening of the heat sink 4, and surrounds the outside of the opening of the heat sink 4; the shape of the second sealing strip 7 is the same as that of the second sealing groove 61. For example, rectangular ring, circular ring, etc.

[0078] The third connecting member 100 includes a third bolt. The heat sink 4 is provided with a second connecting hole, and the transformer assembly 6 is provided with a second threaded hole located inside the second sealing groove 61 and corresponding to the second connecting hole. The rod of the third bolt is threadedly connected to the second connecting hole of the heat sink 4 and the second threaded hole of the transformer assembly 6, so as to lock the transformer assembly 6 and the heat sink 4. Preferably, a plurality of third bolts are uniformly arranged along the circumference of the heat sink 4. When the third bolt includes four, it is located at the four corners of the heat sink 4.

[0079] As shown in Figure 8 At least part of the outer side of the second sealing strip 7 is provided with a second metal conductive layer 71. After the transformer assembly 6 and the heat sink 4 are connected together, the part of the second sealing strip 7 with the second metal conductive layer 71 can be in contact with the transformer assembly 6 and the heat sink 4, so that the transformer assembly 6 and the heat sink 4 can be electrically connected at the fault through the second metal conductive layer 71. The second sealing strip 7 has good sealing effect and good electromagnetic shielding function, which can prevent electromagnetic leakage and electromagnetic interference at the fault, and meet the electromagnetic compatibility requirements. Specifically, the outer side of the arc-shaped sealing part 81, part of the side and the bottom of the second sealing strip 7 are provided with the second metal conductive layer 71 in communication, so that the heat sink 4 and the transformer assembly 6 are electrically connected at the fault.

[0080] In some embodiments, the entire outer side surface of the second sealing strip 7 is provided with the second metal conductive layer 71, which is in conductive connection with the heat sink 4 and the transformer assembly 6 regardless of the deformation of the second sealing strip 7, thereby improving the electromagnetic compatibility and electromagnetic shielding effect of the inverter structure. The second metal conductive layer 71 can be formed by coating a conductive material on the surface of the second sealing strip 7, or by directly pasting a conductive patch on the surface of the second sealing strip 7. In addition, the second sealing strip 7 can be made of a material with conductive properties, such as foamed conductive rubber, which not only has good sealing effect, but also has good electromagnetic shielding function.

[0081] The box body 1 and the upper cover 2 of the embodiment of the present application can be integrally formed by a mold, so that the product has good consistency, beautiful appearance, low cost, high product quality reliability, and is suitable for mass production.

[0082] The energy storage inverter structure of the embodiment of the present application can be operated and maintained from the front without affecting the appearance, which is more intuitive and convenient, and reduces the maintenance cost. Meanwhile, the first sealing ring with the electromagnetic shielding layer, the first and second sealing strips with the metal conductive layer are provided, which ensures the sealing and conductivity between the box body, the upper cover, the heat sink and the transformer assembly, so that the entire inverter structure has good conductivity and sealing, has shielding effect, can prevent electromagnetic leakage and electromagnetic interference, and meets the electromagnetic compatibility requirements.

[0083] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage inverter structure, characterized by, The energy storage inverter structure comprises: a box body (1) with a plurality of press-in nut columns (91) fixed inside; an upper cover (2) provided with a plurality of through holes (22), each of which is fixed with a press-in part (92) with a countersunk hole (921), the distal end face of the press-in part (92) being flush with the distal end face of the upper cover, and the proximal end face of the press-in part (92) protruding from the proximal end face of the upper cover; a first sealing ring (3) sealingly connected between the box body (1) and the upper cover (2); a sealing element (94) arranged between the press-in part (92) and the press-in nut column (91); a plurality of first connecting members, i.e. a plurality of first bolts (93), the shank of each of which passes through the press-in part (92) and the sealing element (94) in sequence and is connected with the press-in nut column (91) to sealingly lock the upper cover (2) and the box body (1), and the head of the first bolt (93) is embedded in the countersunk hole (921); a heat sink (4) detachably and sealingly connected below the box body (1); a transformer assembly (6) detachably and sealingly connected on the heat sink (4).

2. The energy storage inverter structure of claim 1, wherein, The sealing element (94) comprises a sealing gasket (941) and a sealing sleeve (942) arranged around the edge of the sealing gasket (941), the sealing gasket (941) is provided with a mounting hole, and the sealing gasket (941) is arranged between the proximal end face of the press-in part (92) and the distal end face of the press-in nut column (91), and the sealing sleeve (942) is arranged around the outside of the press-in nut column (91).

3. The energy storage inverter structure of claim 1, wherein, At least two opposite side edges of the opening of the box body (1) are provided with a first flange (11) extending in the horizontal direction, the edge of the first flange (11) is further provided with a second flange (12) folded towards the distal end, the edge of the second flange (12) is flush with the height of the other side edge of the opening of the box body (1), and the press-in nut column (91) is fixed on the first flange (11).

4. The energy storage inverter structure of claim 3, wherein, An annular connecting groove (32) is formed in the first sealing ring (3), the opening of the connecting groove (32) faces downward, the top edge of the box body (1) is inserted into the connecting groove (32), and the first bolt (93) is located inside the first sealing ring (3).

5. The energy storage inverter structure of claim 4, wherein, The first sealing ring (3) comprises: a first sealing part (34) provided with a deformation cavity (341) inside, one side of the deformation cavity (341) being provided with an exhaust hole (342) in communication with the outside; A second sealing part (35) is connected below the first sealing part (34), the hardness of the second sealing part (35) is greater than that of the first sealing part (34), the connecting groove (32) is arranged on the second sealing part (35), and the inner wall of the connecting groove (32) is provided with a guide strip (33) extending upwardly and obliquely, and the outer side of the guide strip (33), the inner wall of the connecting groove (32) and the outer side of the first sealing ring (3) are provided with a connected electromagnetic shielding layer (31). The box body (1) and the upper cover (2) are conductively connected through the electromagnetic shielding layer (31).

6. The energy storage inverter structure of claim 1, wherein, A first sealing groove (41) is arranged in the heat sink (4) in a ring shape, a first sealing strip (5) is arranged in the first sealing groove (41), a second sealing groove (61) is arranged in the transformer assembly (6) in a ring shape, and a second sealing strip (7) is arranged in the second sealing groove (61).

7. The energy storage inverter structure of claim 6, wherein, At least part of the outer side of the first sealing strip (5) is provided with a first metal conductive layer (51), and the box body (1) and the heat sink (4) are sealingly connected through the first sealing strip (5) and conductively connected through the first metal conductive layer (51). At least part of the outer side of the second sealing strip (7) is provided with a second metal conductive layer (71), and the transformer assembly (6) and the heat sink (4) are sealingly connected through the second sealing strip (7) and conductively connected through the second metal conductive layer (71).

8. The energy storage inverter structure of claim 7, wherein, The first sealing strip (5) and the second sealing strip (7) are the same in structure, cavities (8) are arranged in the first sealing strip (5) and the second sealing strip (7), and two arc-shaped sealing parts (81) are arranged at the top ends of the first sealing strip (5) and the second sealing strip (7).

9. The energy storage inverter structure of claim 1, wherein, The edge of the upper cover (2) is provided with a third flange (21), the third flange (21) is folded towards the proximal end to shield the gap between the box body (1) and the upper cover (2) and the first sealing ring (3).

10. The energy storage inverter structure of claim 6, wherein, The heat sink (4) and the box body (1) are detachably connected through a plurality of second connecting pieces (10), the transformer assembly (6) and the heat sink (4) are detachably connected through a plurality of third connecting pieces (100), the second connecting piece (10) comprises a second bolt, the third connecting piece (100) comprises a third bolt, the rod body of the second bolt is threadedly connected with the heat sink (4) through the bottom wall of the box body (1) to lock the box body (1) and the heat sink (4), the rod body of the third bolt is threadedly connected with the transformer assembly (6) through the bottom wall of the heat sink (4) to lock the transformer assembly (6) and the heat sink (4), and the second bolt is located in the inner side of the first sealing strip (5) and the third bolt is located in the inner side of the second sealing strip (7).

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