Power conversion device and manufacturing method therefor
By optimizing the position and structural design of the pouring port and vent in the power conversion device, the problem of uneven filling of the pouring fluid was solved, and better sealing and environmental adaptability were achieved.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2026-03-12
AI Technical Summary
In traditional power conversion devices, uneven filling of the casting fluid affects the sealing effect and the performance of the equipment in harsh environments.
Design a power conversion device with a pouring port and an exhaust port on the housing. The pouring port is closer to the circuit board than the exhaust port, and the pouring liquid is injected from this side. The exhaust port is located at the corner of the housing to facilitate gas discharge. The device combines a contoured structure and tilted placement to optimize the flow of the pouring liquid and the exhaust process.
It improves the uniformity of the casting fluid, ensures the sealing effect, and enhances the protective performance and impact resistance of the device in harsh environments.
Smart Images
Figure CN2024106783_12032026_PF_FP_ABST
Abstract
Description
Power conversion device and manufacturing method thereof
[0001] Related applications
[0002] The present disclosure claims priority to the Chinese patent application No. 2024106539813, filed on May 23, 2024, and entitled "Power conversion device and manufacturing method thereof", the contents of which are hereby incorporated by reference in its entirety. TECHNICAL FIELD
[0003] The present disclosure relates to the field of new energy technology, and in particular, to a power conversion device and a manufacturing method thereof. BACKGROUND
[0004] With the rapid development of new energy technology, solar energy is widely used in daily production and life due to its advantages of no pollution and sustainable utilization. Generally, the light energy of the sun can be converted into electrical energy through photovoltaic power generation technology. The direct current generated by the photovoltaic power generation technology is converted into alternating current by a power conversion device. The alternating current can become usable electrical energy and be input to the power grid through a connector. In order to enable the power conversion device to be used in various harsh environments, it is usually necessary to inject a casting liquid into the power conversion device to seal and form a protective effect. However, for traditional power conversion devices, there is usually a defect of uneven filling of the casting liquid.
[0005] SUMMARY
[0006] One of the technical problems solved by the present disclosure is how to improve the casting uniformity of the power conversion device.
[0007] The first aspect of the present disclosure provides a power conversion device, comprising:
[0008] a housing, which is arranged to form a containing cavity, the housing is provided with a casting port and an exhaust port, the casting port and the exhaust port are both in communication with the containing cavity; and
[0009] a circuit board, which is arranged in the containing cavity, the circuit board has a first surface for mounting electronic components, the casting port is closer to the first surface than the exhaust port.
[0010] The second aspect of the present disclosure provides a manufacturing method for processing the above-mentioned power conversion device, comprising the following steps:
[0011] arranging the power conversion device at a first angle with a horizontal plane as a reference surface, the casting port is lower than the exhaust port in the vertical direction;
[0012] injecting a casting liquid into the containing cavity through the casting port; and
[0013] plugging the casting port and the exhaust port.
[0014] The details of one or more embodiments of the disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the disclosure will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS
[0015] To better describe and illustrate embodiments and / or examples of those inventions disclosed herein, reference can be made to one or more drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, presently described embodiments and / or examples, and the best mode presently contemplated of those inventions.
[0016] Fig. 1 is a perspective structural schematic view of a first prior art power conversion device.
[0017] Fig. 2 is a perspective structural schematic view of a second prior art power conversion device.
[0018] Fig. 3 is a perspective structural schematic view of a power conversion device provided by an embodiment.
[0019] Fig. 4 is a perspective structural schematic view of the power conversion device shown in Fig. 3 from another perspective.
[0020] Fig. 5 is a first example exploded structural schematic view of the power conversion device shown in Fig. 3.
[0021] Fig. 6 is a second example exploded structural schematic view of the power conversion device shown in Fig. 3.
[0022] Fig. 7 is an enlarged structural schematic view of A in Fig. 6.
[0023] Fig. 8 is a perspective sectional structural schematic view of the power conversion device shown in Fig. 3.
[0024] Fig. 9 is a plan structural schematic view of the power conversion device shown in Fig. 3.
[0025] Fig. 10 is a perspective structural schematic view of the power conversion device shown in Fig. 3 tilted relative to a horizontal plane.
[0026] Fig. 11 is a process flow block diagram of a manufacturing method of the power conversion device shown in Fig. 3 provided by an embodiment. DETAILED DESCRIPTION
[0027] To make the above objectives, features and advantages of the disclosure more apparent, the specific embodiments of the disclosure are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the disclosure. However, the disclosure can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the disclosure, so the disclosure is not limited to the specific embodiments disclosed below.
[0028] In the description of the present disclosure, it needs to be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.
[0029] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0030] In the present disclosure, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms 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. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.
[0031] In the present disclosure, unless otherwise explicitly specified and limited, if the first feature appears "on" or "under" the second feature and the like, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0032] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be noted that the term "comprising" or "including" when used in this specification, specifies the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "exemplary" means an example and is not intended to convey an indication of a preferred or ideal embodiment. As used herein, the term "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms are used for explanation only and are not intended to be limiting.
[0033] In the field of photovoltaic power generation, direct current generated by photovoltaic power generation is converted into alternating current by a power conversion device, and the alternating current can become usable power directly input to a power grid or stored using an energy storage device. In order to enable the power conversion device to be used in various harsh environments, not only is the shell of the power conversion device sealed, but a pouring liquid is usually injected into the power conversion device to seal electronic devices in the power conversion device and form a protective effect.
[0034] In the prior art shown in FIG. 1, the pouring port a is arranged on the side of the shell, so that the pouring port a is far from the side of the power conversion device opposite to the pouring port a, which causes the pouring liquid to be difficult to effectively fill the side of the power conversion device opposite to the pouring port a, thereby making it difficult to ensure the uniformity of pouring. In the prior art shown in FIG. 2, the pouring port b and the exhaust port c are both in the same plane, and the exhaust port c is in the middle of the shell of the power conversion device. In this way, it is difficult for the gas in the power conversion device to gather in the exhaust port c and be discharged, so that the uniformity of pouring is affected due to the presence of residual gas in the power conversion device.
[0035] Referring to FIGS. 3, 5 and 6, a power conversion device 10 provided in an embodiment of the present disclosure includes a shell 100 and a circuit board 200, the shell 100 encloses a receiving cavity 130, the circuit board 200 is arranged in the receiving cavity 130, the shell 100 is provided with a pouring port 1111 and an exhaust port 1121, and the pouring port 1111 and the exhaust port 1121 both communicate with the receiving cavity 130. The circuit board 200 has a first face 210 and a second face 220, the first face 210 and the second face 220 are two surfaces arranged in opposite directions perpendicular to the first face, along the direction perpendicular to the first face, the first face 210 is arranged towards the pouring port 1111 and the exhaust port 1121, and the first face 210 is also used for mounting other electronic components. Along the direction perpendicular to the first face, the pouring port 1111 is closer to the first face 210 than the exhaust port 1121.
[0036] In a possible implementation, as shown in FIG. 3, the pouring port 1111 and the exhaust port 1121 can be apart from each other by ΔH in a direction perpendicular to the first face, and ΔH can be in a range from 10 mm to 15 mm, for example, ΔH can be specifically 10 mm, 12.5 mm, or 15 mm, etc.
[0037] As shown in FIG. 5, the power conversion device 10 further includes a transformer 300, which can be disposed on the first face 210. The pouring liquid can be injected into the accommodating cavity 130 from the pouring port 1111, and the solidified pouring liquid can seal and protect the shell 100 and the electronic components, so as to ensure that the power conversion device 10 can be applied to various harsh environments such as heat, acid and alkali, rain and snow, and ice, and can also improve the anti-impact performance of the power conversion device 10. During the injection of the pouring liquid from the pouring port 1111, the air in the accommodating cavity 130 will be gradually exhausted from the exhaust port 1121.
[0038] The pouring liquid can be an electrically insulating material, for example, the pouring liquid can be glue made of silica gel material, etc., so that the solidified pouring liquid has good elasticity to bear a large stress. It can be understood that as long as the material has electrically insulating performance and elasticity after solidification, it can be used as the pouring liquid.
[0039] In view of the fact that the pouring port 1111 is closer to the first face 210 than the exhaust port 1121, during the filling of the accommodating cavity 130 with the pouring liquid, the liquid surface formed by the pouring liquid in the accommodating cavity 130 will finally reach the exhaust port 1121, avoiding the liquid surface from reaching the exhaust port 1121 before the accommodating cavity 130 is filled with the pouring liquid, so as to prevent the exhaust port 1121 from being blocked and unable to effectively exhaust, thereby ensuring that the air in the accommodating cavity 130 can be completely exhausted to the outside from the exhaust port 1121, avoiding the residual gas in the accommodating cavity 130 from affecting the uniformity of the pouring liquid filling, that is, improving the uniformity of the glue injection.
[0040] Referring to FIG. 3, FIG. 4 and FIG. 9, in some embodiments, the shell 100 has a first corner 140 where two sides of the shell 100 intersect, it can be understood that the part within a preset distance to the intersection line where the two sides of the shell 100 intersect is the first corner 140. The two sides of the shell 100 are respectively referred to as the first side 101 and the second side 102 of the shell 100, for example, the position on the shell 100 which is 20mm to 30mm away from the first side 101 and 20mm to 35mm away from the second side 102 belongs to the first corner 140, the preset distance to the first side 101 can be 20mm or 25mm, etc., and the preset distance to the second side 102 can be 25mm or 30mm, etc. The length of the first side 101 can be greater than the length of the second side 102, that is, the first side 101 is the long side and the second side 102 is the short side, of course, the lengths of the first side 101 and the second side 102 can also be equal.
[0041] The exhaust port 1121 is arranged at a position close to the first corner 140, for example, the center of the exhaust port 1121 can be located at the first corner 140, and for example, the exhaust port 1121 is at least partially located at the first corner 140. The exhaust port 1121 can be circular, etc. In this way, during the filling process of the pouring liquid in the accommodation cavity 130, since the first corner 140 is the intersection of two directions, the air at each position in the accommodation cavity 130 is more easily gathered from different directions to the first corner 140, so that the air pressure near the exhaust port 1121 is relatively large, ensuring that the gas is quickly discharged from the exhaust port 1121, avoiding the gas remaining in the accommodation cavity 130 to affect the uniformity of the pouring liquid filling, and ultimately improving the glue injection uniformity.
[0042] Referring to FIG. 4, FIG. 5 and FIG. 6, in some embodiments, the shell 100 can be a profiling structure, the shell 100 can be made of electrically insulating materials such as plastic, the first surface 210 of the circuit board 200 is arranged towards the profiling structure along the direction perpendicular to the first surface, the profiling structure can be understood as a concave-convex structure suitable for electronic components with different heights protruding relative to the circuit board 200 in the accommodation cavity 130, for example, the profiling structure can be a rough structure, that is, by making a part of the shell 100 a preset height away from the circuit board 200, to adapt to multiple electronic components with a certain range of protruding heights relative to the circuit board 200. For example, the profiling structure can be a fine structure, that is, by making different parts of the shell 100 a preset height away from the circuit board 200, to adapt to each electronic component with different heights protruding relative to the circuit board 200. By setting the profiling structure, the amount of pouring liquid can be saved.
[0043] The profiled structure can have a rounded corner, which can improve the uniformity of the pouring liquid flow rate, avoid gas remaining in the accommodation cavity 130 to affect the uniformity of the pouring liquid filling, and thus prevent the existence of holes in the solid formed after the pouring liquid solidifies.
[0044] Referring to FIGS. 4, 5 and 6, the profiled structure includes a first region 111 and a second region 112, the first region 111 is closer to the first face 210 than the second region 112, which can be understood as the first region 111 is arranged lower than the second region 112 in the vertical direction, the pouring port 1111 is arranged in the first region 111, and the exhaust port 1121 is arranged in the second region 112, so that the pouring port 1111 is closer to the first face 210 than the exhaust port 1121, and the pouring port 1111 is lower than the exhaust port 1121. The exhaust port 1121 is arranged at a position close to the first corner 140 in the second region 112. Thus, the gas is quickly discharged from the exhaust port 1121 and avoided to remain in the accommodation cavity 130, thereby improving the uniformity of the glue injection.
[0045] Referring to FIGS. 4, 5, 6 and 9, in some embodiments, the first region 111 includes a second corner 1112, and the two side edges of the first region 111 intersect at the second corner 1112. It can be understood that the part within a predetermined distance from the intersection line of the two side edges of the first region 111 is the second corner 1112, and the two side edges of the first region 111 are respectively referred to as the third side edge 103 and the fourth side edge 104 of the first region 111, for example, the position of the first region 111 which is 10mm to 20mm away from the third side edge 103 and 15mm to 25mm away from the fourth side edge 104 belongs to the second corner 1112, and the predetermined distance from the third side edge 103 can be 15mm or 20mm, etc., and the predetermined distance from the fourth side edge 104 can be 20mm or 25mm, etc.
[0046] The pouring port 1111 is arranged at a position close to the second corner 1112, for example, the center of the pouring port 1111 can be located in the second corner 1112, and for example, the pouring port 1111 is at least partially located in the second corner 1112. The pouring port 1111 can be circular, of course, it can also be square or regular polygon, etc. The second corner 1112 has a rounded corner, which is arranged to avoid dead corners, and will be helpful to improve the flowability of the pouring liquid in the accommodation cavity 130, on the one hand, the pouring liquid can quickly fill the accommodation cavity 130, and improve the glue injection efficiency; on the other hand, the fast flowing pouring liquid can also expel the gas in the accommodation cavity 130 from the exhaust port 1121, thereby avoiding the residual gas to affect the uniformity of the glue injection. When the pouring port 1111 is circular, the circular pouring port 1111 is matched with the rounded corner, which can save the area of the shell 100, and also makes the shell 100 easier to process.
[0047] Referring to FIG. 4, FIG. 5 and FIG. 6, the second area 112 includes a third corner 1123 where two sides of the second area 112 intersect, it can be understood that the part within a preset distance to the intersection line of the two sides of the second area 112 is the third corner 1123, and the definition of the third corner 1123 can refer to the above-mentioned second corner 1112. The exhaust port 1121 is arranged at the third corner 1123, so that the air in the accommodation cavity 130 is more easily gathered to the third corner 1123, avoiding the gas remaining in the accommodation cavity 130 to affect the uniformity of the filling of the pouring liquid, and finally improving the uniformity of the glue injection.
[0048] Referring to FIG. 4, FIG. 5 and FIG. 6, since the pouring port 1111 is arranged at the first area 111 and the exhaust port 1121 is arranged at the second area 112, the centers of the pouring port 1111 and the exhaust port 1121 are kept at a preset distance, and the preset distance is in the range of 120mm to 140mm, and the specific value of the preset distance can be 120mm, 130mm or 140mm, etc. In this way, the pouring port 1111 and the exhaust port 1121 are arranged, which is also beneficial to the pouring liquid to have a proper flow distance, thereby optimizing the exhaust effect, and finally improving the uniformity of the glue injection.
[0049] For example, the diameter of the pouring port 1111 and the exhaust port 1121 can be 5mm to 15mm, and the diameters of the pouring port 1111 and the exhaust port 1121 can not be equal, for example, the diameter of the pouring port 1111 can be smaller than the diameter of the exhaust port 1121, so that the exhaust port 1121 has a relatively large diameter, which is beneficial to reduce the flow resistance of the gas flowing through the exhaust port 1121, thereby improving the exhaust effect, and finally improving the uniformity of the glue injection.
[0050] Referring to FIG. 5, in some embodiments, the first surface 210 of the circuit board 200 has a blank area 211 on which no electronic components are installed, and the orthogonal projection of the pouring port 1111 in the direction perpendicular to the first surface falls on the blank area 211. In this way, it can be understood that the pouring port 1111 is located directly above the blank area 211, so that the pouring port 1111 is staggered with the electronic components on the circuit board 200. Avoiding the pouring liquid flowing out of the pouring port 1111 directly falling on the electronic components, thereby preventing the pressure of the pouring liquid directly acting on the electronic components to produce a destructive effect on the electronic components, and finally improving the safety of the glue injection.
[0051] Referring to FIG. 5 and FIG. 6, in some embodiments, the first surface 210 has a DC region 212 and an AC region 213. The DC region 212 is used to mount DC electronic components, which are components on the DC side. Of course, the DC region 212 can also mount AC electronic components. The DC electronic components usually have few package shells, so most of the DC electronic components are bare electronic components. The AC region 213 is used to mount AC electronic components, which are components on the AC side. The AC electronic components usually have package shells, so most of the AC electronic components are packaged electronic components.
[0052] Since most of the DC electronic components are bare electronic components, the cast port 1111 can be made to fall within the DC region 212 in the orthogonal projection along the direction perpendicular to the first surface, i.e., the cast port 1111 is directly above the DC region 212 and the DC electronic components. In this way, the pouring liquid flowing out of the cast port 1111 covers the DC region 212 and the DC electronic components earlier and more, so that the gas flows out of the DC region 212 earlier, avoiding bubbles remaining in the DC region 212, improving the coverage effect of the pouring liquid on the DC region 212 and the DC electronic components, and thus forming a more solid encapsulation and protection for the bare DC electronic components.
[0053] Since most of the AC electronic components are packaged electronic components, the AC electronic components themselves have relatively high protection performance, and the requirement for encapsulation using pouring liquid is relatively low. The exhaust port 1121 can be made to fall within the AC region 213 in the orthogonal projection along the direction perpendicular to the first surface, i.e., the AC region 213 and the AC electronic components are directly above. In this way, the gas in the accommodation cavity 130 is gathered near the AC region 213 and discharged from the exhaust port 1121.
[0054] Referring to FIG. 3 and FIG. 5, the power conversion device 10 can further comprise a connector assembly 400, which can comprise a DC assembly 410 and an AC assembly 420, the housing 100 has a mounting side 150, the connector assembly 400 is arranged at the mounting side 150, and the distance between the pouring port 1111 and the mounting side 150 is less than a preset distance. For example, the distance between the pouring port 1111 and the mounting side 150 can be less than or equal to 2 mm. It can be understood that, in view of the presence of the connector assembly 400, the sealing performance of the mounting side 150 of the housing 100 will be affected, so when the distance between the pouring port 1111 and the mounting side 150 is less than the preset distance, it can be ensured that sufficient pouring liquid has sufficient time to fill the gap between the connector assembly 400 and the housing 100, thereby sealing the gap between the connector assembly 400 and the housing 100, and also making the gas flow out of the area near the mounting side 150 earlier, avoiding bubbles remaining in the area near the mounting side 150 to affect the uniformity of pouring, thereby improving the coverage effect of the pouring liquid on the mounting side 150, and ultimately improving the sealing performance of the power conversion device 10.
[0055] Referring to FIG. 5, FIG. 6 and FIG. 8, in some embodiments, the housing 100 can comprise a first shell 110 and a second shell 120, the first shell 110 and the second shell 120 jointly form a receiving cavity 130, the pouring port 1111 and the exhaust port 1121 are arranged on the first shell 110, and the circuit board 200 is carried on the second shell 120. The second shell 120 is provided with an annular groove 121 surrounding the circuit board 200, and during the mounting process of the first shell 110 and the second shell 120, the flange on the first shell 110 can be matched with the annular groove 121. It can be understood that the flange is also annular, so that the flange on the first shell 110 can be inserted into the annular groove 121. During the assembly process of the power conversion device 10, the flange on the first shell 110 can be matched with the annular groove 121 first, and then the sealing material is contained in the annular groove 121, on the one hand, the sealing material seals the annular groove 121 and the receiving cavity 130; on the other hand, the sealing material also connects the first shell 110 and the second shell 120 to each other to form a complete housing 100. After the assembly of the housing 100 is completed, the pouring liquid can be injected into the receiving cavity 130 through the pouring port 1111 to encapsulate the entire power conversion device 10. The sealing material can be glue and the like.
[0056] Referring to FIGS. 6, 7 and 8, in some embodiments, the second shell 120 comprises a limiting member 122 for bearing the circuit board 200, the limiting member 122 has a first limiting surface 1221 and a second limiting surface 1222, the first limiting surface 1221 and the second limiting surface 1222 are connected at an included angle, for example, the first limiting surface 1221 and the second limiting surface 1222 can be perpendicular to each other. The first limiting surface 1221 abuts against the second surface 220 along a direction perpendicular to the first surface, so that the first limiting surface 1221 plays a bearing role on the circuit board 200, and also so that there is a spacing gap 230 between the circuit board 200 and the second shell 120 along a direction perpendicular to the first surface. The second limiting surface 1222 abuts against the circuit board 200 along a direction perpendicular to the direction perpendicular to the first surface.
[0057] Referring to FIGS. 6, 7 and 8, for example, the limiting member 122 is an edge limiting member 1223 arranged at an edge of the second shell 120, the second limiting surface 1222 of the edge limiting member 1223 abuts against an edge of the circuit board 200, so that the edge of the circuit board 200 and the second shell 120 form a flow-through channel 240 that communicates with the spacing gap 230, obviously, the flow-through channel 240 is arranged around the circuit board 200. In the process of pouring the pouring liquid from the pouring port 1111 into the accommodating cavity 130, the pouring liquid located at one side of the first surface 210 of the circuit board 200 will enter into the spacing gap 230 through the flow-through channel 240, so that the pouring liquid enters into the side of the second surface 220 of the circuit board 200, so that the pouring liquid covers the first surface 210 and the second surface 220, and then the pouring liquid covers the entire circuit board 200, finally improving the packaging effect of the circuit board 200.
[0058] Referring to FIGS. 6, 7 and 8, for example, the limiting member 122 is an edge limiting member 1223 arranged at an edge of the second shell 120, the second limiting surface 1222 of the edge limiting member 1223 abuts against an edge of the circuit board 200, so that the edge of the circuit board 200 and the second shell 120 form a flow-through channel 240 that communicates with the spacing gap 230, obviously, the flow-through channel 240 is arranged around the circuit board 200. In the process of pouring the pouring liquid from the pouring port 1111 into the accommodating cavity 130, the pouring liquid located at one side of the first surface 210 of the circuit board 200 will enter into the spacing gap 230 through the flow-through channel 240, so that the pouring liquid enters into the side of the second surface 220 of the circuit board 200, so that the pouring liquid covers the first surface 210 and the second surface 220, and then the pouring liquid covers the entire circuit board 200, finally improving the packaging effect of the circuit board 200.
[0059] According to actual needs, the intermediate limiting piece 1224 and the edge limiting piece 1223 can be used alone, that is, the second shell 120 includes only the intermediate limiting piece 1224 or only the edge limiting piece 1223, or the intermediate limiting piece 1224 and the edge limiting piece 1223 can be used simultaneously, that is, the second shell 120 includes both the intermediate limiting piece 1224 and the edge limiting piece 1223. The number of the intermediate limiting piece 1224 and the edge limiting piece 1223 is multiple.
[0060] Referring to FIGS. 3 and 4, in some embodiments, the power conversion device 10 further includes a sealing piece 500 for sealing the pouring port 1111 and the exhaust port 1121. When the pouring cavity 130 is filled with the pouring liquid and the pouring liquid is solidified and formed, the pouring port 1111 and the exhaust port 1121 can be sealed by the sealing piece 500, thereby preventing external dust and liquid from entering the pouring cavity 130.
[0061] Referring to FIGS. 3 and 5, in some embodiments, the power conversion device 10 further includes an indicator light 600, which includes a light-emitting part 610 and a sealing part 620. The light-emitting part 610 is arranged on the first surface 210, and the sealing part 620 covers the light-emitting part 610 and is attached to the first surface 210. The sealing part 620 can protect the light-emitting part 610 from being covered by the pouring liquid. The light generated by the indicator light 600 can be transmitted through the shell 100 having a light-transmitting property or through a light-transmitting hole on the shell 100, so that the working condition of the circuit board 200 can be determined according to the light-emitting state of the indicator light 600. Further, the indicator light 600 can further include a light guide column 630 connected to the sealing part 620. The light guide column 630 is used for guiding the light signal of the light-emitting part 610 to the outer surface of the shell 100, so that the light-emitting condition of the indicator light 600 can be tracked more conveniently.
[0062] Referring to FIGS. 10 and 11, the present disclosure further provides a manufacturing method of the power conversion device 10, which mainly includes the following steps:
[0063] S710, the power conversion device 10 is arranged at a first angle a with a horizontal plane as a reference surface, and the pouring port 1111 is lower than the exhaust port 1121 in the vertical direction.
[0064] S720, the pouring liquid is injected into the pouring cavity 130 through the pouring port 1111.
[0065] S730, the pouring port 1111 and the exhaust port 1121 are sealed.
[0066] In some embodiments, the power conversion device 10 can be horizontally placed on a horizontal plane, and the first angle a is 0°. In another example, the power conversion device 10 can be placed on the horizontal plane in an inclined manner, and the first angle a is in a range from 15° to 30°, and the first angle a can be 15°, 20° or 30°, etc. Of course, when the power conversion device 10 is inclined, the pouring port 1111 must be lower than the exhaust port 1121 in the vertical direction. By placing the power conversion device 10 in an inclined manner, the distance between the exhaust port 1121 and the pouring port 1111 in the vertical direction can be further increased, which is beneficial to improving the flowability of the pouring liquid and the exhaust of the gas from the exhaust port 1121, thereby improving the pouring uniformity of the power conversion device 10.
[0067] For convenience of description, the two long sides of the power conversion device 10 are respectively referred to as a first long side and a second long side, and the two short sides of the power conversion device 10 are respectively referred to as a first short side and a second short side. In the process of inclining, the power conversion device 10 can be fixed by a clamp. For example, the first short side of the power conversion device 10 can be arranged parallel to the horizontal plane, and the second short side of the power conversion device 10 is higher than the first short side relative to the horizontal plane, and the long side of the power conversion device 10 is at the first angle a relative to the horizontal plane. FIG. 9 shows the case that the first short side of the power conversion device 10 is parallel to the horizontal plane. In another example, the first long side of the power conversion device 10 can be arranged parallel to the horizontal plane, and the second long side of the power conversion device 10 is higher than the first long side relative to the horizontal plane, and the short side of the power conversion device 10 is at the first angle a relative to the horizontal plane. In another example, the power conversion device 10 can be placed on the clamp at the intersection of the two long sides and the two short sides, and the long side and the short side of the power conversion device 10 can be at the first angle a relative to the horizontal plane.
[0068] In some embodiments, in the process of injecting the glue into the accommodating cavity 130 through the pouring port 1111, the glue can be injected into the accommodating cavity 130 through a one-way valve, which has the function of preventing the glue from flowing back. For example, the one-way valve is arranged at the pouring port 1111, and the one-way valve only allows the pouring liquid to enter the accommodating cavity 130 from the outside, and prevents the pouring liquid in the accommodating cavity 130 from leaving the one-way valve to the outside, which can effectively prevent the pouring liquid in the accommodating cavity 130 from overflowing from the pouring port 1111, so that the pouring liquid can fill the accommodating cavity 130 as soon as possible, thereby improving the pouring efficiency and avoiding the waste of the pouring liquid.
[0069] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, and it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in a contradiction.
[0070] The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in a relatively specific and detailed manner, but should not be construed as limiting the scope of the patent application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.
Claims
1. A power conversion device, wherein, include: A shell is provided to form a receiving cavity, and the shell is provided with a pouring port and an exhaust port, both of which are connected to the receiving cavity; and A circuit board is disposed within the accommodating cavity, the circuit board having a first surface for mounting electronic components, and the pouring port being closer to the first surface than the venting port.
2. The power conversion device of claim 1, wherein, The pouring port and the vent are spaced ΔH apart in a direction perpendicular to the first surface.
3. The power conversion device of claim 1, wherein, The first surface has a blank area where no electronic components are installed, and the orthographic projection of the pouring gate in a direction perpendicular to the first surface falls on the blank area.
4. The power conversion device of claim 1, wherein, The first surface has a DC region and an AC region. The DC region is used to install DC electronic components, and the AC region is used to install AC electronic components. Along a direction perpendicular to the first surface, the orthographic projection of the pouring port falls on the DC region, and the orthographic projection of the vent falls on the AC region.
5. The power conversion device of claim 1, wherein, It also includes a connector assembly, the housing having a mounting side for mounting the connector assembly, and the distance between the pouring port and the mounting side is less than a first preset distance.
6. The power conversion device of claim 1, wherein, The housing has a first corner where two sides intersect, and the exhaust port is located near the first corner.
7. The power conversion device of claim 6, wherein, The housing is a contoured structure, which includes a first region and a second region. The first region is closer to the first surface than the second region, and the exhaust port is located in the second region near the first corner.
8. The power conversion device of claim 1, wherein, The shell is a contoured structure, which includes a first region and a second region. The first region is closer to the first surface than the second region. The pouring port is located in the first region, and the vent is located in the second region.
9. The power conversion device of claim 8, wherein, The first region includes a second corner with rounded corners, and the pouring gate is located near the second corner and is circular.
10. The power conversion device of claim 8, wherein, The second region includes a third corner, and the exhaust port is located near the third corner.
11. The power conversion device of claim 1, wherein, The centers of the pouring port and the vent are kept at a preset distance, and the preset distance ranges from 120mm to 200mm.
12. The power conversion device of claim 1, wherein, The housing includes a first housing and a second housing that together form the accommodating cavity. The pouring port and the vent are both located in the first housing, and the circuit board is supported on the second housing.
13. The power conversion device of claim 12, wherein, The second housing has an annular groove that surrounds the circuit board and engages with a flange on the first housing to accommodate sealing material.
14. The power conversion device of claim 12, wherein, The second housing includes a limiting member for supporting the circuit board. The limiting member has a first limiting surface and a second limiting surface connected at an angle. The circuit board has a second surface opposite to the first surface. The first limiting surface abuts against the second surface in a direction perpendicular to the first surface, so that there is a gap between the circuit board and the second housing in a direction perpendicular to the first surface. The second limiting surface abuts against the circuit board in a direction perpendicular to the first surface.
15. The power conversion device of claim 14, wherein, The limiting member is an edge limiting member, which is arranged at the edge of the second shell, and the second limiting surface of the edge limiting member abuts against the edge of the circuit board to form a flow channel between the edge of the circuit board and the second shell, which communicates with the gap.
16. The power conversion device of claim 14, wherein, The limiting member is an intermediate limiting member, which is arranged at the middle of the second shell, and the intermediate limiting member comprises a support and a column arranged at the middle of the support, the first limiting surface of the intermediate limiting member is the upper surface of the support, and the second limiting surface of the intermediate limiting member is the outer surface of the column, and the column penetrates through the circuit board.
17. The power conversion device of claim 1, wherein, The sealing member is further included, which is used to block the pouring port and the exhaust port.
18. The power conversion device of claim 1, wherein, The indicator lamp further comprises a light guide column, which is connected with the sealing part and used to guide the light signal of the light emitting part to the outer surface of the shell.
19. The power conversion device of claim 18, wherein, The caliber of the pouring port is less than or equal to the caliber of the exhaust port.
20. The power conversion device of any one of claims 1-19, wherein, The method comprises the following steps:
21. A manufacturing method for processing the power conversion device according to any one of claims 1 to 19, wherein The power conversion device is arranged at a first angle with the horizontal plane as a reference plane, and the pouring port is lower than the exhaust port in the vertical direction; The pouring liquid is injected into the accommodating cavity through the pouring port; and The pouring port and the exhaust port are blocked. The first angle is 0°.
22. The manufacturing method of claim 21, wherein, The first angle is 15° to 30°.
23. The manufacturing method of claim 21, wherein, The method further comprises injecting the pouring liquid into the accommodating cavity through a one-way valve.
24. The manufacturing method of claim 21, wherein,