Power unit

Abstract

This invention discloses a power unit. The power unit includes: a substrate, the substrate having a first side surface; a pressing structure located on the first side surface of the substrate; and a power structure pressed against the first side surface by the pressing structure. According to the power unit of this invention, by using the pressing structure to press the power structure against the first side surface of the substrate, the mounting of the power structure on the substrate can be ensured to be firm and reliable.

Description

Technical Field

[0001] This invention relates to the field of frequency converter technology, and more specifically, to a power unit. Background Technology

[0002] In existing frequency converters, the power structure needs to be mounted on a base plate and is suitable for connection with the drive circuit board and multi-layer busbars. However, the mounting of the power structure on the base plate is not secure, and the power structure is prone to falling off. Therefore, some solutions add a fixing structure to fix the power structure on the base plate. However, in the existing technology, after the power structure is connected to the drive circuit board and multi-layer busbars through the fixing structure, long pins are required to pass through the busbars and drive circuit board, resulting in a large overall device size. In addition, the pins of the various power structures are prone to mutual interference, which can easily lead to failure. Moreover, the process of mounting the power structure on the base plate using the fixing structure in existing products is complex and the installation efficiency is low. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, the present invention proposes a power unit that improves the robustness of the power structure mounted on a substrate.

[0004] According to an embodiment of the present invention, a power unit includes: a substrate having a first side surface on a first side; a pressing structure located on the first side of the substrate; and a power structure pressed against the first side surface by the pressing structure.

[0005] According to the power unit of the present invention, the power structure is pressed against the first side of the substrate by the pressing structure, which can ensure that the power structure is firmly and reliably mounted on the substrate.

[0006] According to some embodiments of the present invention, the power unit further includes: a first holding structure, the first holding structure extending from the substrate in a direction away from the first side and passing through the pressing structure, so that the pressing structure is held on the first side of the substrate.

[0007] Furthermore, the power unit further includes a second holding structure, which is adapted to be connected to the first holding structure, thereby holding the pressing structure on the first side of the substrate.

[0008] Optionally, the first retaining structure is constructed as a columnar structure, and the second retaining structure is constructed as a ring structure that sleeves the columnar structure.

[0009] Specifically, the first retaining structure is perpendicular to the first side and has a free end away from the substrate, and the second retaining structure is screwed onto the first retaining structure from the side of the pressing structure away from the substrate.

[0010] According to some embodiments of the present invention, the first retaining structure is configured as a screw with external threads, and the second retaining structure is configured as a nut with internal threads.

[0011] According to some embodiments of the present invention, the second retaining structure presses against the side of the pressing structure opposite to the substrate.

[0012] According to some embodiments of the present invention, the tablet compression structure includes: a tablet compression body, the tablet compression body being formed as a recessed groove structure recessed toward the first side, and the opening of the tablet compression body being opposite to the first side.

[0013] Furthermore, at least a portion of the second retaining structure is located within the recessed groove of the tablet body, and the end face of the free end of the first retaining structure away from the substrate is also located within the recessed groove.

[0014] Specifically, the second retaining structure presses against the bottom wall of the tablet body, the first retaining structure passes through the bottom wall of the tablet body, and a tablet body positioning hole adapted to the first retaining structure is formed on the bottom wall of the tablet body.

[0015] According to some embodiments of the present invention, the tablet compression structure includes: a tablet compression body and a tablet compression arm, wherein the tablet compression arm is connected to the tablet compression body and is used to press against the power structure.

[0016] Specifically, the power structure includes a first power structure and a second power structure, which are spaced apart; the tableting arm includes a first tableting arm and a second tableting arm, wherein the first tableting arm is used to press against the first power structure, the second tableting arm is used to press against the second power structure, and the tableting body is located between the first power structure and the second power structure.

[0017] Furthermore, the first power structure has a first connecting foot, the second power structure has a second connecting foot, the first connecting foot and the second connecting foot are respectively located on the opposite outer sides of the first power structure and the second power structure, and the tablet body is located between the opposite inner sides of the first power structure and the second power structure.

[0018] Optionally, the angle between the first connecting foot extending from the first power structure and the second connecting foot extending from the second power structure is 180 degrees.

[0019] According to some embodiments of the present invention, the first power structure and the second power structure are arranged opposite to each other in a first direction of the substrate, there are multiple first power structures arranged in a second direction of the substrate, there are multiple second power structures arranged in the second direction of the substrate, and there are multiple pressing structures arranged in the second direction, wherein the first direction and the second direction are perpendicular to each other.

[0020] Furthermore, the plurality of first power structures, the plurality of tablet compression structures, and the plurality of second power structures correspond one-to-one in the first direction.

[0021] According to some embodiments of the present invention, multiple tableting structures are connected as one unit by a tableting connecting part.

[0022] Furthermore, the tablet connecting part is connected between the tablet bodies of two adjacent tablet structures.

[0023] According to some embodiments of the present invention, the tablet pressing structure includes: a tablet pressing body and a tablet pressing arm, a first retaining structure passing through the tablet pressing body, and the tablet pressing arm being connected side-by-side with the tablet pressing body in a first direction of the substrate and used to press against the power structure; there are multiple tablet pressing structures, and the multiple tablet pressing structures are connected to each other in a second direction of the substrate, wherein the first direction and the second direction are perpendicular to each other.

[0024] Furthermore, the tableting arm includes a first tableting arm and a second tableting arm, the first tableting arm and the second tableting arm being symmetrically connected to both sides of the tableting body; and, the tableting bodies of two adjacent tableting structures are connected to each other through a tableting connection portion.

[0025] Specifically, the tablet body is formed as a recessed groove structure that is concave towards the first side. The opening of the tablet body is away from the first side. The first tablet arm and the second tablet arm are respectively connected to the two ends of the opening of the tablet body, and the first tablet arm and the second tablet arm extend in a direction away from each other.

[0026] According to some embodiments of the present invention, the power unit further includes a positioning portion for positioning the power structure on the substrate.

[0027] According to some embodiments of the present invention, the positioning part includes a positioning piece, the positioning piece having a through positioning port, the positioning port being matched with the power structure.

[0028] Optionally, the positioning piece is further provided with an annular positioning rib surrounding the positioning port, and the annular positioning rib matches the outer peripheral surface of the power structure.

[0029] According to some embodiments of the present invention, the positioning piece is an insulating positioning piece and is bonded and fixed to the first side of the substrate.

[0030] According to some embodiments of the present invention, the positioning piece is provided with a positioning piece through hole for matching with the first retaining structure and allowing the first retaining structure to pass through to form a positioning fit.

[0031] According to some embodiments of the present invention, the positioning portion includes a groove formed on the first side surface of the substrate, the groove matching the outer peripheral surface of the power structure.

[0032] According to some embodiments of the present invention, the power unit further includes a heat insulation structure disposed on the first side of the substrate in a manner that surrounds the power structure.

[0033] According to some embodiments of the present invention, the first side of the substrate is the side facing the busbar.

[0034] According to some embodiments of the present invention, the tableting structure is configured as a gull-wing shape and includes a tableting body, a first tableting arm, and a second tableting arm. The first tableting arm and the second tableting arm are symmetrically connected to both sides of the tableting body, and the free ends of the first tableting arm and the second tableting arm each have a bent section that bends toward the substrate.

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] Figure 1 This is a three-dimensional assembly diagram of the power unit;

[0037] Figure 2 This is an assembled side view of the power unit;

[0038] Figure 3 This is a three-dimensional exploded view of the power unit;

[0039] Figure 4 This is an exploded side view of the power unit;

[0040] Figure 5 This is a three-dimensional assembly diagram of the power unit when the substrate has raised strips.

[0041] Figure 6 This is a three-dimensional exploded view of the power unit when there are grooves on the substrate;

[0042] Figure 7 This is a three-dimensional assembly diagram of the power unit when there are grooves on the substrate;

[0043] Figure 8 This is an assembly side view of the power unit when a groove is provided on the substrate;

[0044] Figure 9 This is a three-dimensional schematic diagram of the tablet compression structure.

[0045] Figure label:

[0046] Power unit 100, substrate 10, protrusion 11, groove 12, pressing structure 20, pressing body 21, pressing body positioning hole 211, pressing arm 22, first pressing arm 221, second pressing arm 222, pressing connection part 23, bending section 24, power structure 30, first power structure 31, first connecting foot 311, second power structure 32, second connecting foot 321, first pin 331, second pin 332, third pin 333, holding structure 45, first holding structure 40, second holding structure 50, positioning piece 60, positioning port 61, annular positioning rib 62, positioning piece through hole 63, heat insulation structure 60'. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "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 invention 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 invention.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] The following is combined with Figures 1-9 The power unit 100 according to an embodiment of the present invention will be described in detail.

[0051] Reference Figures 1-8 As shown, the power unit 100 according to an embodiment of the present invention may include: a substrate 10, a pressing structure 20, a power structure 30, and a first side of the substrate 10 (i.e., Figure 2 The upper side of the substrate 10 has a first side surface, the pressing structure 20 is located on the first side of the substrate 10, and the power structure 30 is pressed against the first side surface of the substrate 10 by the pressing structure 20.

[0052] According to the power unit 100 of the present invention, the power structure 30 is pressed against the first side of the substrate 10 by the pressing structure 20, which can ensure that the power structure 30 is firmly and reliably installed on the substrate 10.

[0053] Reference Figures 1-9 As shown, the power unit 100 further includes a holding structure 45, which includes a first holding structure 40. The first holding structure 40 extends from the substrate 10 in a direction away from the first side, and the first holding structure 40 passes through the pressure plate structure 20, so that the pressure plate structure 20 is held on the first side of the substrate 10. Furthermore, the pressure plate structure 20 presses against the power structure 30, thus holding the power structure 30 on the first side of the substrate 10. In other words, referring to... Figure 2 , Figure 8 As shown, the first holding structure 40 passes through the pressing structure 20 from bottom to top. The pressing structure 20 is held on the first side of the substrate 10 by the first holding structure 40. That is, when the first holding structure 40 passes through the pressing structure 20, the relative position of the pressing structure 20 and the substrate 10 is determined. The first holding structure 40 can play the role of positioning the pressing structure 20.

[0054] In some embodiments not shown, the pressing structure 20 may also be directly fixed, for example, welded to the substrate 10, thus eliminating the retaining structure 45. This helps to reduce the number of connecting parts and thereby reduce the weight of the power unit 100.

[0055] Furthermore, referring to Figures 1-8 As shown, the retaining structure 45 further includes a second retaining structure 50, which is adapted to and connected to the first retaining structure 40, thereby retaining the pressing structure 20 on a first side of the substrate 10. The second retaining structure 50 is connected to the first retaining structure 40 on the side of the pressing structure 20 facing away from the substrate 10. Figure 2As shown, the second retaining structure 50 is connected to the first retaining structure 40 on the upper side of the pressing structure 20. The upper side of the pressing structure 20 has a spacious area, providing operating space for the installation and removal of the second retaining structure 50. The pressing structure 20 is clamped between the second retaining structure 50 and the substrate 10, while the power structure 30 is clamped between the pressing structure 20 and the substrate 10.

[0056] In the description of this invention, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] exist Figures 1-8 In the embodiment shown, the first retaining structure 40 is constructed as a columnar structure, and the second retaining structure 50 is constructed as a ring structure with the columnar structure sleeved on it. The pressing structure 20 is sandwiched between the second retaining structure 50 and the substrate 10 to prevent the pressing structure 20 from detaching from the substrate 10.

[0058] Specifically, the first retaining structure 40 is perpendicular to the first side of the substrate 10 and has a free end away from the substrate 10. The second retaining structure 50 is screwed onto the first retaining structure 40 from the side of the pressing structure 20 away from the substrate 10, which facilitates quick connection or disassembly between the second retaining structure 50 and the first retaining structure 40.

[0059] In some alternative embodiments, the first retaining structure 40 is configured as a screw with external threads, and the second retaining structure 50 is configured as a nut with internal threads, which is screwed into the screw to facilitate the installation and removal of the pressure plate structure 20.

[0060] Reference Figures 1-8 As shown, the second retaining structure 50 presses against the side of the pressing structure 20 away from the substrate 10. The second retaining structure 50 can apply a pressing force towards the substrate 10 to the pressing structure 20 to prevent the pressing structure 20 from shaking and make the connection between the pressing structure 20 and the substrate 10 more reliable.

[0061] Reference Figures 1-9 As shown, the tablet compression structure 20 includes: a tablet compression body 21, which is formed as a recessed groove structure facing the first side, and the opening of the tablet compression body 21 faces away from the first side. (Refer to...) Figure 2 , Figure 4 As shown, the tablet body 21 is formed as a downwardly recessed groove structure, with the opening of the tablet body 21 facing upward.

[0062] Furthermore, at least a portion of the second retaining structure 50 is located within the recessed groove of the pressing body 21, and the end face of the first retaining structure 40 away from the substrate 10 (i.e., the upper end face of the first retaining structure 40) is also located within the recessed groove. This shortens the distance between the end face of the first retaining structure 40 away from the substrate 10 and the substrate 10, while also shortening the distance between the second retaining structure 50 and the substrate 10. In this way, the retaining structure 45 is located within the recessed groove of the pressing body 21 as much as possible, which can reduce the size of the power unit 100 in the height direction and create a larger usable space above the pressing structure 20, making it easier to leave installation space for other components and preventing mutual interference during installation.

[0063] exist Figure 2 In the embodiment shown, the second retaining structure 50 is entirely located within the recessed groove, and the upper end face of the first retaining structure 40 is also located within the recessed groove, thereby further reducing the size of the power unit 100 in the height direction.

[0064] Reference Figure 2 As shown, the overlap dimension of the second holding structure 50 and the power structure 30 in the thickness direction of the power structure 30 is more than half the thickness of the second holding structure 50, thereby ensuring that the second holding structure 50 is located in the recessed groove of the tablet body 21 as much as possible, which can further reduce the distance between the second holding structure 50 and the substrate 10.

[0065] Reference Figures 1-3 , Figure 5 , Figures 7-9 As shown, the second retaining structure 50 presses against the bottom wall of the tablet body 21, and the first retaining structure 40 passes through the bottom wall of the tablet body. A tablet body positioning hole 211 adapted to the first retaining structure 40 is formed on the bottom wall of the tablet body. After the first retaining structure 40 passes through the tablet body positioning hole 211 on the bottom wall of the tablet body, the tablet structure 20 can be initially positioned, which facilitates the subsequent use of the second retaining structure 50 to fix the tablet structure 20.

[0066] Reference Figure 9 As shown, the tablet compression structure 20 includes: a tablet compression body 21 and a tablet compression arm 22, the tablet compression arm 22 being connected to the tablet compression body 21, and referring to... Figures 1-2 , Figure 5 As shown, the tablet arm 22 is used to press against the power structure 30, which is clamped between the tablet structure 20 and the substrate 10.

[0067] Reference Figures 1-8As shown, the power structure 30 may include a first power structure 31 and a second power structure 32, which are spaced apart. The tablet compression arm 22 includes a first tablet compression arm 221 and a second tablet compression arm 222. The first tablet compression arm 221 is used to press against the first power structure 31, and the second tablet compression arm 222 is used to press against the second power structure 32. The tablet compression body 21 is located between the first power structure 31 and the second power structure 32, and the holding structure 45 is also located between the first power structure 31 and the second power structure 32.

[0068] Furthermore, the first power structure 31 has a first connecting foot 311, the second power structure 32 has a second connecting foot 321, the first connecting foot 311 and the second connecting foot 321 are respectively located on the opposite outer sides of the first power structure 31 and the second power structure 32, and the tablet body 21 is located between the opposite inner sides of the first power structure 31 and the second power structure 32.

[0069] Optionally, the angle between the first connecting pin 311 extending from the first power structure 31 and the second connecting pin 321 extending from the second power structure 32 is 180 degrees. That is, the pins of the first connecting pin 311 and the second connecting pin 321 are both arranged outwards, leaving a middle space between the first power structure 31 and the second power structure 32, so that the retaining structure 45 can fix the pressing structure 20 to the substrate 10 from this middle space.

[0070] The first connecting pin 311 and the second connecting pin 321 each include a first pin 331, a second pin 332, and a third pin 333, each of which is adapted to be electrically connected to a drive circuit board or a corresponding busbar.

[0071] Reference Figure 2 , Figure 4 As shown, the first connecting pin 311 extends to the left from the first power structure 31, and the second connecting pin 321 extends to the right from the second power structure 32, with an included angle of 180 degrees. This avoids interference between the first and second power structures 31 and 32 if the first connecting pin 311 and the second connecting pin 321 are too close together when they face each other. Furthermore, when the first power structure 31 and the second power structure 32 are connected to their respective busbars or drive circuit boards, both the first connecting pin 311 and the second connecting pin 321 face outwards, providing ample space for convenient operation.

[0072] Reference Figure 1 , Figure 3 , Figures 5-7As shown, the first power structure 31 and the second power structure 32 are arranged opposite to each other in a first direction of the substrate 10. There are multiple first power structures 31, and these multiple first power structures 31 are arranged on the substrate 10 in a second direction. There are also multiple second power structures 32, and these multiple second power structures 32 are arranged on the substrate 10 along the second direction. There are also multiple pressing structures 20, and these multiple pressing structures 20 are arranged along the second direction. The first direction and the second direction are perpendicular to each other. When the substrate 10 is rectangular, the first direction can be the width direction of the substrate 10, and the second direction can be the length direction of the substrate 10.

[0073] Furthermore, the plurality of first power structures 31, the plurality of pressing structures 20, and the plurality of second power structures 32 correspond one-to-one in the first direction. A pair of first power structures 31 and second power structures 32 arranged opposite to each other can be pressed against the substrate 10 by the same pressing structure 20.

[0074] In some embodiments not shown, the multiple tableting structures 20 may be independent entities.

[0075] exist Figure 1 , Figure 3 , Figure 9 In the illustrated embodiment, multiple pressing structures 20 are connected as a single unit via pressing connectors 23, thereby saving assembly steps for the multiple pressing structures 20 and improving the assembly efficiency of the power unit 100. Simultaneously, the integrated pressing structure 20 can simultaneously press multiple power structures 30, resulting in high pressing efficiency. The integrated pressing structure 20 is pressed against the substrate 10 by two or more retaining structures 45.

[0076] Furthermore, the tablet connecting part 23 is connected between the tablet bodies 21 of two adjacent tablet structures 20, and the width of the tablet connecting part 23 can be equal to the width of the tablet body 21.

[0077] exist Figure 1 , Figure 3 , Figure 9 In the embodiment shown, the tablet compression structure 20 includes a tablet compression body 21 and a tablet compression arm 22. A first holding structure 40 passes through the tablet compression body 21. The tablet compression arm 22 is connected side-by-side with the tablet compression body 21 in a first direction of the substrate 10, and the tablet compression arm 22 is used to press against the power structure 30. There are multiple tablet compression structures 20, and the multiple tablet compression structures 20 are connected to each other in a second direction of the substrate 10. The first direction and the second direction are perpendicular to each other.

[0078] Furthermore, the tablet compression arm 22 may include a first tablet compression arm 221 and a second tablet compression arm 222, which are symmetrically connected to both sides of the tablet compression body 21; and the tablet compression bodies 21 of two adjacent tablet compression structures 20 are connected to each other through the tablet compression connecting part 23.

[0079] Reference Figure 2 , Figure 4 , Figure 9 As shown, the tablet compression body 21 is formed as a recessed groove structure facing the first side. The opening of the tablet compression body 21 is away from the first side. The first tablet compression arm 221 and the second tablet compression arm 222 are respectively connected to the two ends of the opening of the tablet compression body 21, and the first tablet compression arm 221 and the second tablet compression arm 222 extend in a direction away from each other. (Refer to...) Figure 2 , Figure 4 As shown, the tablet body 21 is formed as a downwardly recessed groove structure, with the opening of the tablet body 21 facing upward, the first tablet arm 221 extending to the left, and the second tablet arm 222 extending to the right.

[0080] In some optional embodiments, the power unit 100 may further include a positioning portion for positioning the power structure 30 on the substrate 10, thereby ensuring that the power structure 30 is accurately positioned on the substrate 10 and preventing the power structure 30 from arbitrarily shaking on the substrate 10.

[0081] exist Figures 1-4 In the illustrated embodiment, the positioning part includes a positioning piece 60, on which a through positioning opening 61 is provided. The positioning opening 61 matches the power structure 30. For example, both the outer peripheral surface of the power structure 30 and the positioning opening 61 are rectangular. The power structure 30 is positioned in the positioning opening 61, and the bottom of the power structure 30 is directly attached to the substrate 10. The substrate 10 can be a metal substrate 10. The heat of the power structure 30 can be transferred to the substrate 10. A cooling device or a heating device can be provided below the substrate 10 to cool or heat the power structure 30.

[0082] Optionally, such as Figures 3-4 As shown, the positioning piece 60 is also provided with an annular positioning rib 62 surrounding the positioning opening 61, and the annular positioning rib 62 matches the outer peripheral surface of the power structure 30. The annular positioning rib 62 protrudes from the surface of the positioning piece 60, which can increase the firmness of the positioning of the power structure 30 and improve the positioning effect.

[0083] exist Figures 1-4 In the embodiment shown, the positioning piece 60 is an insulating positioning piece, and the positioning piece 60 is bonded and fixed to the first side of the substrate 10.

[0084] Reference Figure 1 , Figure 3As shown, the positioning piece 60 is provided with a positioning piece through hole 63 for matching with the first retaining structure 40 and allowing the first retaining structure 40 to pass through to form a positioning fit. After the first retaining structure 40 passes through the positioning piece through hole 63, the positioning piece 60 can be initially positioned. After the first retaining structure 40 passes through the positioning piece through hole 63 on the positioning piece 60 and the pressing body positioning hole 211 on the pressing body 21, it connects with the second retaining structure 50, thereby fixing the positioning piece 60 and the pressing structure 20 between the second retaining structure 50 and the substrate 10.

[0085] exist Figure 5 In the embodiment shown, the positioning part includes a protrusion 11 provided on the first side of the substrate 10, thereby saving the positioning piece 60, which helps to reduce the number of parts and save assembly time.

[0086] Optionally, the ridge 11 is a continuous annular ridge 11, which matches the outer peripheral surface of the power structure 30.

[0087] Optionally, the protrusion 11 corresponding to each power structure 30 is divided into four segments, which are located on the four sides of the rectangular power structure 30, thereby limiting the power structure 30 in all directions and better positioning the power structure 30 on the substrate 10.

[0088] exist Figures 6-8 In the illustrated embodiment, the positioning portion includes a groove 12 formed on a first side surface of the substrate 10. The peripheral wall of the groove 12 is adapted to match the outer peripheral surface of the power structure 30. Preferably, the groove 12 is a blind groove, such as... Figure 8 As shown, the bottom wall of the groove 12 is adapted to fit against the bottom surface of the power structure 30 to support the power structure 30. This embodiment also saves the positioning piece 60, which helps to reduce the number of parts and save assembly time. At the same time, the groove 12 is directly formed on the first side of the substrate 10, which is simple in process, easy to operate, and refers to Figure 8 As shown, the bottom surface of the power structure 30 is lower than the first side surface of the substrate 10, which can shorten the total height of the power structure 30 after assembly with the substrate 10 and reduce the volume of the power unit 100.

[0089] In some optional embodiments, the power unit 100 may further include a heat insulation structure 60', which is disposed on a first side of the substrate 10 in a manner that surrounds the power structure 30. The heat insulation structure 60' is located between the power structure 30 and the substrate 10, and can separate the power structure 30 from the substrate 10 to prevent the heat from the power structure 30 from affecting the components below the substrate 10, and can also prevent the heat below the substrate 10 from being transferred upward to the power structure 30.

[0090] In some alternative embodiments, the first side of the substrate 10 is the side facing the busbar.

[0091] Reference Figure 2 , Figure 4 , Figure 9 As shown, the tablet compression structure 20 is constructed in a gull-wing shape, and the tablet compression structure 20 may include a tablet compression body 21, a first tablet compression arm 221, and a second tablet compression arm 222. The first tablet compression arm 221 and the second tablet compression arm 222 are symmetrically connected to both sides of the tablet compression body 21. The free ends of the first tablet compression arm 221 and the second tablet compression arm 222 each have a bent section 24 that bends towards the substrate 10. The bent section 24 is adapted to press against the power structure 30, so that the power structure 30 presses against the substrate 10.

[0092] The large planar space above the tablet compression structure 20 provides installation space for other components (taking the busbar as an example) and can significantly shorten the dimensions of the power unit 100 and the busbar assembly in the height direction.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A power unit, characterized in that, include: A substrate, wherein a first side of the substrate has a first side surface; A pressing structure, wherein the pressing structure is located on the first side of the substrate; A power structure, wherein the power structure is pressed against the first side by the pressing structure; The tablet compression structure includes: a tablet compression body and a tablet compression arm, a first retaining structure passing through the tablet compression body, and the tablet compression arm being connected side-by-side with the tablet compression body in a first direction of the substrate and used to press against the power structure; there are multiple tablet compression structures, and the tablet compression bodies of the multiple tablet compression structures are connected to each other in a second direction of the substrate through a tablet compression connecting part, wherein the first direction and the second direction are perpendicular to each other; The power structure includes: a first power structure and a second power structure, wherein the first power structure and the second power structure are spaced apart. The tablet pressing arm includes a first tablet pressing arm and a second tablet pressing arm, which are connected side-by-side with the tablet pressing body in a first direction of the substrate. The first tablet pressing arm is used to press against the first power structure, and the second tablet pressing arm is used to press against the second power structure. The tablet pressing body is located between the first power structure and the second power structure. The first power structure has a first connecting pin, and the second power structure has a second connecting pin, with the first connecting pin and the second connecting pin located on opposite sides of the first power structure and the second power structure, respectively. The first power structure and the second power structure are arranged opposite to each other in a first direction on the substrate. There are multiple first power structures and they are arranged on the substrate in a second direction. There are multiple second power structures and they are arranged on the substrate along the second direction. The multiple first power structures, multiple pressing structures and multiple second power structures correspond one-to-one in the first direction. A pair of first power structures and second power structures arranged opposite to each other are pressed against the substrate by the first pressing arm and the second pressing arm of the same pressing structure.

2. The power unit according to claim 1, characterized in that, The first retaining structure extends from the substrate in a direction away from the first side and passes through the pressing structure, so that the pressing structure is held on the first side of the substrate.

3. The power unit according to claim 2, characterized in that, Also includes: A second retaining structure is adapted to connect with the first retaining structure, thereby holding the pressing structure on the first side of the substrate.

4. The power unit according to claim 3, characterized in that, The first retaining structure is constructed as a columnar structure, and the second retaining structure is constructed as a ring structure that sleeves the columnar structure.

5. The power unit according to claim 4, characterized in that, The first retaining structure is perpendicular to the first side and has a free end away from the substrate, and the second retaining structure is screwed onto the first retaining structure from the side of the pressing structure away from the substrate.

6. The power unit according to claim 4, characterized in that, The first retaining structure is a screw with external threads, and the second retaining structure is a nut with internal threads.

7. The power unit according to claim 3, characterized in that, The second retaining structure presses against the side of the pressing structure opposite to the substrate.

8. The power unit according to claim 3, characterized in that, The tablet compression structure includes: a tablet compression body, which is formed as a recessed groove structure facing the first side, and the opening of the tablet compression body is away from the first side.

9. The power unit according to claim 8, characterized in that, At least a portion of the second retaining structure is located within the recessed groove of the tablet body, and the end face of the free end of the first retaining structure away from the substrate is also located within the recessed groove.

10. The power unit according to claim 8, characterized in that, The second retaining structure presses against the bottom wall of the tablet body, the first retaining structure passes through the bottom wall of the tablet body, and a tablet body positioning hole adapted to the first retaining structure is formed on the bottom wall of the tablet body.

11. The power unit according to claim 1, characterized in that, The angle between the first connecting foot extending from the first power structure and the second connecting foot extending from the second power structure is 180 degrees.

12. The power unit according to claim 1, characterized in that, The tablet body is formed as a recessed groove structure that is concave towards the first side. The opening of the tablet body is away from the first side. The first tablet arm and the second tablet arm are respectively connected to the two ends of the opening of the tablet body, and the first tablet arm and the second tablet arm extend in a direction away from each other.

13. The power unit according to claim 1, characterized in that, Also includes: Positioning portion for positioning the power structure on the substrate.

14. The power unit according to claim 13, characterized in that, The positioning part includes a positioning piece, which has a through positioning port that matches the power structure.

15. The power unit according to claim 14, characterized in that, The positioning plate is also provided with an annular positioning rib surrounding the positioning port, and the annular positioning rib matches the outer peripheral surface of the power structure.

16. The power unit according to claim 14, characterized in that, The positioning piece is an insulating positioning piece and is bonded and fixed to the first side of the substrate.

17. The power unit according to claim 14, characterized in that, The positioning piece is provided with a positioning piece through hole for matching with the first retaining structure and allowing the first retaining structure to pass through to form a positioning fit.

18. The power unit according to claim 13, characterized in that, The positioning portion includes a groove formed on the first side surface of the substrate, the groove matching the outer peripheral surface of the power structure.

19. The power unit according to claim 1, characterized in that, Also includes: A heat insulation structure is disposed on the first side of the substrate in a manner that surrounds the power structure.

20. The power unit according to claim 1, characterized in that, The first side of the substrate is the side facing the busbar.

21. The power unit according to claim 1, characterized in that, The tablet compression structure is shaped like a gull wing and includes a tablet compression body, a first tablet compression arm, and a second tablet compression arm. The first tablet compression arm and the second tablet compression arm are symmetrically connected to both sides of the tablet compression body. The free ends of the first tablet compression arm and the second tablet compression arm each have a bent section that bends toward the substrate.

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