Output copper pillar for inverter module and assembly structure of inverter

Abstract

This invention provides an output copper pillar for an inverter module and an assembly structure for the inverter. The assembly structure includes: a heat sink; a module, including at least one output terminal, mounted on the heat sink; a first circuit board, mounted on the side of the module away from the heat sink; and an output copper pillar, including a pillar body and a base, the base including a connecting part and a fixing part. The pillar body is fixedly connected to the connecting part of the base, the connecting part is fixedly connected to the output terminal, and the fixing part is fixedly connected to the first circuit board. The connection between the output copper pillar and the module is not merely a single-point load-bearing mechanism for the output terminal, but rather distributes external torque and vibration loads to the circuit board, effectively improving the stability between the output copper pillar and the module.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, specifically to an output copper column for an inverter module and an assembly structure for the inverter. Background Technology

[0002] In the field of low-voltage electric drives, such as electric bicycles, electric motorcycles, electric forklifts, and engineering vehicles, the current mainstream power module assembly scheme generally adopts a single-tube parallel structure of discrete components. However, the single-tube parallel structure has problems such as large drive volume and low power density. Therefore, a module for electric drives has been developed. The output end of the module is electrically connected through copper pillars. Specifically, the module is fixed to the heat sink with screws through its own positioning holes. The bottom of the output copper pillar passes through the power circuit board and is fixed to the output terminal of the module with screws. The top serves as an external contact point to connect to the motor cable, forming a power transmission path. At the same time, the electric drive control board is usually plugged into the power circuit board. A slot is opened at the position where the copper pillar passes through the control board, and a current detection magnetic ring is installed in the slot to monitor the current signal of the output copper pillar in real time, providing feedback data for the vector control of the inverter.

[0003] However, existing output copper pillars are single columnar structures, fixed to the module's output terminals only by screws at the bottom, while the top must withstand the torque from the motor cable connection and the vibration load during vehicle operation. The connection between the copper pillar and the module terminals lacks additional mechanical support, making the connection prone to loosening due to long-term stress, leading to problems such as increased contact resistance, increased heat generation, and even electrical connection failure. Utility Model Content

[0004] In view of the lack of mechanical support between the copper pillar and the module terminal in the prior art, this application provides an output copper pillar for an inverter module, which can withstand external torque and vibration resistance while ensuring electrical contact between the output terminal and the copper pillar.

[0005] To achieve the above and other related objectives, this utility model provides an output copper pillar for an inverter module, comprising:

[0006] The column includes a connecting end and a lead-out end, the lead-out end being used to connect to an external circuit;

[0007] The base includes a connecting part and a fixing part. The connecting part is fixedly connected to the output terminal of the inverter module and fixedly connected to the connecting end of the column. The fixing part is fixedly connected to the circuit board of the inverter.

[0008] Optionally, the direction from the column to the base is defined as the top-view direction, and the top view of the base is I-shaped; wherein, the connecting part is centrally located along the base, and the fixing parts are symmetrically distributed at both ends of the connecting part.

[0009] Optionally, a first protrusion is formed at the end of the connecting portion away from the column.

[0010] Optionally, the view from the column to the base is defined as the top-view direction, and the top view of the base is T-shaped; wherein, the connecting part is formed as a vertical beam; the fixing part is symmetrically arranged at both ends of the connecting part to form a horizontal beam, and the fixing part is located on the side of the connecting part away from the column.

[0011] Optionally, a second protrusion is formed on the side of the connecting portion away from the column.

[0012] Optionally, a first through hole is also formed on the connecting part, and the projection of the column on the base does not include the first through hole.

[0013] Optionally, the cylinder has a through hole or a blind hole inside, and the cavity wall of the through hole or the blind hole is provided with threads.

[0014] Optionally, through holes are provided on the fixing parts located on both sides of the column, and the cavity walls of the through holes are provided with threads.

[0015] This application also provides an inverter assembly structure, including:

[0016] heat sink,

[0017] An inverter module, including at least one output terminal, is mounted on the heat sink;

[0018] The first circuit board is mounted on the side of the module away from the heat sink;

[0019] The output copper column includes a column body and a base. The base includes a connecting part and a fixing part. The column body is fixedly connected to the connecting part of the base. The connecting part is fixedly connected to the output terminal. The fixing part is fixedly connected to the first circuit board.

[0020] Optionally, the direction from the column to the base is defined as the top-view direction, and the top view of the base is I-shaped; wherein, the connecting part is centrally located along the base, the fixing parts are symmetrically distributed at both ends of the connecting part, and the column is vertically located on the connecting part.

[0021] Optionally, the base is located between the first circuit board and the heat sink.

[0022] Optionally, a first protrusion is formed at the end of the connecting portion away from the column, the base is located on the side of the first circuit board away from the heat sink, and the first protrusion passes through the first circuit board and is fixedly connected to the output terminal.

[0023] Optionally, it further includes: a second circuit board located on the side of the first circuit board away from the heat sink;

[0024] A current-sensing magnetic ring is disposed on the second circuit board, and the current-sensing magnetic ring is sleeved on the outside of the copper pillar.

[0025] Optionally, the view from the column to the base is defined as the top-view direction, and the top view of the base is T-shaped; wherein, the connecting part is formed as a vertical beam; the fixing part is symmetrically arranged at both ends of the connecting part to form a horizontal beam, and the fixing part is located on the side of the connecting part away from the column.

[0026] Optionally, the base is located between the first circuit board and the heat sink.

[0027] Optionally, a first through hole is formed on the connecting part, and the projection of the column on the base does not include the first through hole; the connecting part is fixedly connected to the output terminal through the first through hole.

[0028] Optionally, the connecting part has an internal hole formed below the column, and the connecting part is fixedly connected to the output terminal through the internal hole.

[0029] Optionally, it also includes a current sensing magnetic ring disposed on the first circuit board, and the current sensing magnetic ring is sleeved on the outside of the copper pillar.

[0030] Optionally, the fixing part is fixedly connected to the first circuit board by any one of bolt connection, welding, or plug-in connection.

[0031] As described above, the output copper pillar for the inverter module and the assembly structure for the inverter provided by this utility model have at least the following beneficial technical effects:

[0032] The output copper pillar of this utility model for an inverter module includes a pillar body and a base. The base includes a connecting part and a fixing part. The connecting part realizes the electrical connection and mechanical support with the module, and the fixing part is fixedly connected to the circuit board. This makes the connection between the output copper pillar and the module not only bear the load at a single terminal, but also distributes the external torque and vibration load to the circuit board. This can effectively prevent the output copper pillar from loosening due to vibration and external torque, and improve stability. In addition, the fixing part of the output copper pillar base extends a certain distance from the pillar body. Since the distance between the fixing bolt and the pillar body is far, even if the current detection magnetic ring is installed on the first circuit board, the fixing bolt or the copper pillar fixing part will not interfere with the magnetic ring. Therefore, the number of circuit boards can be reduced and the cost can be reduced. Attached Figure Description

[0033] Figure 1 This is shown as the first type of output copper pillar for an inverter module provided in this application.

[0034] Figure 2 Displayed as Figure 1 The output shows a top view of the copper pillar.

[0035] Figure 3 This is shown as the second type of output copper column for an inverter module provided in this application.

[0036] Figure 4 Displayed as Figure 5 The attached view of the output copper pillar is shown.

[0037] Figure 5 The image shows the assembly structure of the first type of inverter provided in this application.

[0038] Figure 6 Displayed as Figure 5 Side view of the structure shown.

[0039] Figure 7 This is shown as the assembly structure of the second type of inverter provided in this application.

[0040] Figure 8 This is shown as the assembly structure of the third type of inverter provided in this application.

[0041] Figure Labels

[0042] 11. Column; 111. Connecting end; 112. Lead-out end; 12. Base; 121. Connecting part; 1211. First protrusion; 122. Fixing part; 123. Through hole; 21. Column; 211. Connecting end; 212. Lead-out end; 213. Internal hole; 22. Base; 221. Connecting part; 2211. Second protrusion; 2212. First through hole; 222. Fixing part; 2221. Second through hole; 223. Groove; 3. Heat sink; 4. Module; 41. Output terminal; 42. Plug-in terminal; 5. First circuit board; 51. First opening; 52. Second opening; 53. Mounting hole; 54. Bolt hole; 541. Fixing bolt; 6. Second circuit board; 7. Current detection magnetic ring. Detailed Implementation

[0043] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0044] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Although the illustrations only show components related to this utility model and are not drawn according to the actual number, shape and size of the components, the shape, quantity, positional relationship and proportion of each component can be arbitrarily changed under the premise of realizing the technical solution of this utility model, and the layout of the components may also be more complex.

[0045] Example 1

[0046] This embodiment provides an output copper pillar for an inverter module, such as... Figure 1 As shown, the output copper pillar for the inverter module in this embodiment includes a pillar 11 and a base 12. The pillar 11 includes a connecting end 111 and a lead-out end 112. The lead-out end 112 is used to connect to an external circuit. The base 12 includes a connecting part 121 and a fixing part 122. Please refer to... Figure 5 The connecting part 121 of the base 12 is fixedly connected to the output terminal 41 of the module 4, the connecting part 121 of the base 12 is fixedly connected to the connecting end 111 of the column 11, and the fixing part 122 of the base 12 is fixedly connected to the first circuit board 5 of the inverter.

[0047] Define the direction from column 11 to base 122 as the top-view direction, such as... Figure 2 The image shown is an attached view of the output copper pillar provided in this embodiment; by Figure 2As can be seen from the diagram, the top view of the base 12 of the output copper pillar provided in this embodiment is I-shaped. Specifically, the connecting part 121 is arranged in the center of the base 12, and the fixing parts 122 are symmetrically distributed at both ends of the connecting part 121. The connecting part 121 and the fixing parts 122 are located on the same straight line. (Continue reading...) Figure 1 The connecting end 111 of the column 11 is vertically and fixedly connected to the connecting part 121 of the base 12.

[0048] Specifically, see Figure 1 In this embodiment, the output copper pillar has a first protrusion 1211 formed at the end of the base 12 away from the pillar 11. Specifically, the first protrusion 1211 is located in the middle region of the base 12, that is, the first protrusion 1211 and the pillar 11 are on the same vertical line. Figure 5 As shown, the half-bridge module 4 includes an output terminal 41 and a plug-in terminal 42. The plug-in terminal 42 has a limiting structure 421. Due to the limiting structure 421 on the plug-in terminal 42 of the module 4, there is a height difference H between the lower surface of the first circuit board 5 and the upper surface of the output terminal 41. To ensure a closer fit between the upper surface of the base 12 and the first circuit board 5, a first protrusion 1211 is provided. Figure 6 As shown, the sum of the height h1 of the base 12 and the height h2 of the first protrusion 1211 is equal to the height difference H (H = h1 + h2) between the lower surface of the first circuit board 5 and the upper surface of the output terminal 41.

[0049] Generally, the shape of the first protrusion 1211 can be set according to actual needs. Optionally, the shape of the first protrusion 1211 includes various shapes such as cylindrical, trapezoidal, rectangular, and triangular. Specifically, the height requirement of the first protrusion 1211 can be met as described above. Optionally, the first protrusion 1211 is rectangular, and the size of the rectangle is equal to the size of the base 12, which is equivalent to increasing the thickness of the base 12 so that the height of the base is equal to the height difference between the lower surface of the first circuit board 5 and the upper surface of the output terminal 41. In this embodiment, the first protrusion 1211 is a cylinder, and the diameter is equal to the diameter of the cylinder 11. The area of ​​the first protrusion 1211 is smaller than the area of ​​the base 12, so the thickness of the fixing part 122 of the base 12 is smaller than the thickness of the connecting part 121, and the base 12 as a whole has a certain elastic deformation capability so that the top surface of the base 12 fits the first circuit board 5 more closely.

[0050] Optionally, the method for manufacturing the output copper pillar for the inverter module includes: integrated cutting processing to directly process the copper material into an integral structure including the pillar 11 and the base 12, achieving a seamless rigid connection between the pillar 11 and the base 12. The manufacturing method further includes: separately manufacturing the base 12 and the pillar 11, the base 12 including a connecting part 121 (including a protrusion 1211 on the connecting part 121) and a fixing part 122, and then welding the connecting part 121 of the base 12 and the connecting end of the pillar 11 together by welding. The manufacturing method further includes: separately manufacturing the base 12 and the pillar 11, the base 12 including only the fixing part 122, and forming a groove in the middle of the base 12 for mounting the pillar 11, passing the pillar 11 through the base 12, with one end of the pillar 11 located below the base 12, and joining them together by welding or mechanical connection. Other methods for forming the structure of this embodiment are also included but will not be described in detail.

[0051] Optionally, the column 11 has a through hole inside, and the inner wall of the column 11 has threads. Optionally, the connecting end 111 and the lead-out end 112 of the column 11 form non-through blind holes from bottom to top and from top to bottom, and the inner wall of the blind holes of the column 11 has threads.

[0052] Optionally, a through hole 123 is formed on the fixing part 122 of the base 12, and a thread is formed on the inner wall of the through hole 123. In this embodiment, a through hole 123 is respectively provided on the fixing part 122 located on both sides of the column 11.

[0053] Example 2

[0054] This embodiment also provides an output copper pillar for an inverter module, such as... Figure 3 As shown, the output copper pillar for the inverter module in this embodiment also includes a pillar 21 and a base 22. The pillar 21 includes a connecting end 211 and a lead-out end 212. The lead-out end 212 is used to connect to an external circuit. The base 22 includes a connecting part 221 and a fixing part 222. Please refer to... Figure 8 The connecting part 221 of the base 22 is fixedly connected to the output terminal 41 of the inverter, the connecting part 221 of the base 22 is fixedly connected to the column 11, and the fixing part 222 of the base 22 is fixedly connected to the first circuit board 5 of the inverter.

[0055] Define the direction from column 21 to base 22 as the top-view direction, such as... Figure 4 The image shown is an attached view of the output copper pillar provided in this embodiment; by Figure 4 As can be seen, the bottom view of the base 22 provided in this embodiment is T-shaped. The connecting part 221 is formed as a vertical beam, and the fixing parts 222 are symmetrically arranged at both ends of the connecting part 221 to form horizontal beams. The fixing parts 222 are located on the side of the connecting part 221 away from the column 21. (Continue reading) Figure 3The connecting part 221 of the column 21 is vertically fixedly connected to the connecting part 221 of the base 22, and the column 21 is vertically set on the side of the vertical beam away from the horizontal beam.

[0056] Alternatively, as described in Embodiment 1, such as Figure 8 As shown, the plug-in terminal 42 of the half-bridge module 4 has a limit structure 421, resulting in a height difference H between the lower surface of the first circuit board 5 and the output terminal 41 of the half-bridge module 4. Specifically, in this embodiment, the connecting portion 221 of the output copper pillar and the base 22 has a second protrusion 2211 formed at the end away from the pillar 11. This makes the sum of the height h2 of the second protrusion 2211 and the height h1 of the base 22 equal to the height difference H between the lower surface of the first circuit board 5 and the upper surface of the output terminal 41. Optionally, the shape of the second protrusion 2211 can be set according to actual needs. Specifically, in this embodiment, the shape of the second protrusion 2211 is the same as that of the connecting portion 221.

[0057] Optionally, a groove 223 is formed in the middle of the upper surface of the base 22. The groove 223 makes the thickness of the fixing part 222 at both ends less than the thickness of the fixing part near the middle, so that the base 22 has a certain elastic deformation and the base 22 fits the first circuit board 5 more tightly.

[0058] Optionally, the method for manufacturing the output copper column provided in this embodiment is similar to the method provided in Embodiment 1, specifically including: integral cutting or separate independent manufacturing of the column 21 and the base 22 (including the connecting part 221 and the fixing part 222), followed by welding and other processes.

[0059] Optionally, the lead-out end 212 of the column 21 has a blind hole formed from top to bottom, and the inner wall of the blind hole of the column 21 has a thread. Specifically, as shown in the figure... Figure 4 As shown, in this embodiment, a built-in hole 213 is formed in the column 21 located below the connecting portion 221. Optionally, the built-in hole 213 and the bolt hole in the lead-out end 211 of the column 21 belong to the same through hole and are located on the same vertical line; alternatively, the built-in hole 213 and the blind hole in the lead-out end 211 of the column 21 are not on the same vertical line. Optionally, a first through hole 2212 is also formed on the connecting portion 221 of the base 22, and the projection of the column 21 on the base 22 does not include the first through hole 2212, that is, the first through hole 2212 is located on the end of the connecting portion 221 away from the column; alternatively, a second through hole 2221 is also formed on the fixing portions 222 on both sides of the connecting portion 221. Specifically, threads are formed on the inner walls of the built-in hole 312 and all through holes.

[0060] Example 3

[0061] This embodiment provides an inverter assembly structure, such as Figure 5 As shown, the inverter assembly structure provided in this embodiment includes: a heat sink 3; a half-bridge module 4, the half-bridge module 4 including at least one output terminal 41, and the half-bridge module 4 mounted on the heat sink 1; a first circuit board 5, mounted on the side of the half-bridge module 4 away from the heat sink 3; and an output copper pillar 1, including a pillar body 11 and a base 12, the base 12 including a connecting part 121 and a fixing part 122, the fixing part 122 being fixedly connected to the first circuit board 5, and the base 12 being mounted on the side of the first circuit board 5 near the heat sink 3.

[0062] Specifically, such as Figure 5 As shown, the output copper pillar in the inverter assembly structure provided in this embodiment includes the output copper pillar 1 of the inverter assembly structure in Embodiment 1. The top view of the base 12 of the output copper pillar is I-shaped. Specifically, the connecting part 121 is arranged in the center of the base 12, the fixing parts 122 are symmetrically distributed at both ends of the connecting part 121, and the pillar 11 is vertically arranged on the connecting part 121. The specific structure is the same as or similar to that described in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0063] The base 12 of the output copper pillar 1 is mounted on the side of the first circuit board 5 near the heat sink 3. Specifically, the base 12 of the output copper pillar 1 is located between the first circuit board 5 and the heat sink 3, the pillar 11 passes through the first circuit board 5, the connecting end 111 of the pillar 11 is located below the first circuit board 5, and the lead-out end 112 of the pillar 11 is located above the first circuit board 5. Specifically, the connecting part 121 of the base 12 is fixedly connected to the output terminal 41.

[0064] Optionally, if the output copper pillar 1 is the output copper pillar described in Embodiment 1, that is, the first protrusion 1211 formed at the end of the connecting part 121 away from the pillar 11, the first protrusion 1211 is located on the side of the first circuit board 5 near the heat sink, and the first protrusion 1211 is fixedly connected to the output terminal 41.

[0065] Optionally, if the output copper pillar 1 is the output copper pillar described in Embodiment 2, the connecting part 121 on the base 12 is directly fixedly connected to the output terminal 41.

[0066] Specifically, the half-bridge module 4 includes a plastic package, a substrate, multiple discrete chips integrated on the substrate, and multiple terminals. The terminals include output terminals 41 and plug-in terminals 42, etc. In this embodiment, the output terminal 41 extends horizontally out of the plastic package, and the other terminals extend in a direction perpendicular to the output terminal 41. Optionally, bolt holes are formed on the half-bridge module 4 to securely connect the half-bridge module 4 to the heat sink 3; in this embodiment, a bolt hole is provided on each of the two sides of the half-bridge module 4 where no terminals are provided. Optionally, bolt holes are formed on the output terminal 41 to facilitate the fixed connection between the output terminal 41 and the output copper pillar.

[0067] Specifically, the first circuit board 5 is provided with a first opening 51 through which the output copper pillar 1 passes, a second opening 52 for connecting the upper terminal of the half-bridge module 4, mounting holes 53 for fixing the half-bridge module 4 to the heat sink 3 and the first circuit board 5, and bolt holes 54 for fixing the output copper pillar 1 to the first circuit board 5. Optionally, the first circuit board 5 is also provided with connection circuits, control devices, etc. (not shown in the figure).

[0068] Optionally, the inverter assembly structure provided in this embodiment further includes a second circuit board 6, which is located on the side of the first circuit board 5 away from the heat sink 3. The first circuit board 5 is provided with a control module, connection lines, etc. (not shown in the figure). The second circuit board 6 has an opening through which the output terminal 1 passes. The inverter assembly structure provided in this embodiment also includes a current sensing magnetic ring 7, which is disposed on the second circuit board 6 and sleeved on the outside of the output copper pillar 1. The current sensing magnetic ring 7 is used for real-time current monitoring: when current flows through the output copper pillar, an alternating magnetic field is generated around it. The current sensing magnetic ring 7, sleeved on the outside of the copper pillar, can sense this magnetic field and convert it into an electrical signal proportional to the current magnitude.

[0069] like Figure 5 As shown, the assembly steps of the half-bridge module 4, the first circuit board 5, the output terminal 1, and the second circuit board 6 include: Step a, fixing the output terminal 41 of the half-bridge module 4 to the connection part 121 of the output copper pillar 1 with screws; Step b, inserting the remaining terminals of the half-bridge module 4 into the first circuit board 5 and soldering them; Step c, fixing the plastic body of the half-bridge module 4 to the heat sink 3 with bolts through the mounting holes 53 on the first circuit board; Step d, connecting the output copper pillar 1 to the first circuit board 5 with fixing bolts 541, specifically, fixing the fixing part 122 of the base 12 to the first circuit board 5 with fixing bolts 541; Step e, installing the second circuit board 6 with the current detection magnetic ring 7 onto the first circuit board 5, and making the pillar 11 pass through the current detection magnetic ring 7.

[0070] Specifically, the assembly methods include: the first method, step a → step b → step c → step d → step e; the second method, step a → step b → step d → step c → step e; the third method, step d → step b → step a → step c → step e; and the fourth method, step a → step c → step b → step d → step e.

[0071] Specifically, in step d, the method of fixing the output copper pillar 1 to the first circuit board 5 also includes: soldering pads, setting protrusion-like pins on the output copper pillar 1 to achieve plug-in connection with the first circuit board 5, and other fixed connection methods.

[0072] The inverter assembly structure provided in this embodiment uses output copper pillars to directly connect to the output terminals of the half-bridge module. Through the fixed connection between the fixing part 121 on the output copper pillar and the first circuit board 5, the output copper pillar 1 is electrically connected while simultaneously strengthening the mechanical connection between the output copper pillar 1, the half-bridge module, and the first circuit board. External torque is not borne by a single point on the output terminal, thus enhancing the torsional strength of the copper pillar and reducing the loosening rate. Furthermore, the assembly method provided in this embodiment can also use output copper pillars without the first protrusion 1211, offering a wider range of options.

[0073] Example 4

[0074] This embodiment also provides an inverter assembly structure, such as Figure 7 As shown, the inverter assembly structure provided in this embodiment also includes: a heat sink 3; a half-bridge module 4; a first circuit board 5; and an output copper pillar 1, including a pillar body 11 and a base 12. The base 12 includes a connecting part 121 and a fixing part 122, and the fixing part 122 is fixedly connected to the first circuit board 5. In particular, this embodiment differs from Embodiment 5 in that the base 12 is installed on the side of the first circuit board 5 away from the heat sink 3.

[0075] Specifically, such as Figure 7 As shown, the inverter assembly structure provided in this embodiment includes the output copper pillars for the inverter assembly structure provided in Embodiment 1. The base 12 of the output copper pillar has an I-shape in its top view. Specifically, the connecting part 121 is arranged in the center of the base 12, the fixing parts 122 are symmetrically distributed at both ends of the connecting part 121, and the pillar 11 is vertically arranged on the connecting part 121. A first protrusion 1211 is formed at the end of the connecting part 121 away from the pillar 11. The first protrusion 1211 is located on the side of the first circuit board 5 away from the heat sink, and the first protrusion 1211 is fixedly connected to the output terminal 41. The specific structure is the same as or similar to that described in Embodiment 1, and will not be repeated here.

[0076] The base 12 of the output copper pillar 1 is mounted on the side of the first circuit board 5 away from the heat sink 3. Specifically, the base 12 of the output copper pillar 1 is located between the first circuit board 5 and the second circuit board 6, and the first protrusion 1211 of the connecting part 121 passes through the first circuit board 5 and is fixedly connected to the output terminal 41 of the half-bridge module 4.

[0077] Referring to Embodiment 5, the assembly method of the inverter assembly structure provided in this embodiment includes: First, step d → step b → step a → step c → step e; Second, step b → step a → step d → step c → step e; Third, step b → step d → step a → step c → step e. Specifically, using the second and third assembly methods, the terminals of the half-bridge module 4 are first inserted into the first circuit board 5. Wave soldering can be used, with the soldering surface of the first circuit board 5 directly contacting the high-temperature liquid tin for soldering, greatly improving soldering efficiency.

[0078] The assembly structure provided in this embodiment enhances the torsional strength of the output copper pillars while allowing the half-bridge module to be installed on the first circuit board first, followed by the installation of the output copper pillars. This allows for the use of wave soldering, which offers higher welding efficiency.

[0079] Example 5

[0080] This embodiment also provides an inverter assembly structure, such as Figure 8 As shown, the inverter assembly structure provided in this embodiment also includes: a heat sink 3; a half-bridge module 4; a first circuit board 5; and an output copper pillar 2, including a pillar body 21 and a base 22. The base 22 includes a connecting part 221 and a fixing part 222, and the fixing part 222 is fixedly connected to the first circuit board 5. In particular, this embodiment differs from Embodiment 5 in that the output copper pillar in this embodiment is the output copper pillar described in Embodiment 3.

[0081] Specifically, such as Figure 8 As shown, the inverter assembly structure provided in this embodiment includes the output copper column 2 of the inverter assembly structure provided in Embodiment 2. The bottom view of the base 22 of the output copper column 2 is T-shaped, the connecting part 221 is formed as a vertical beam, and the fixing part 222 is symmetrically arranged at both ends of the connecting part 221 to form a horizontal beam. The fixing part 222 is located on the side of the connecting part 221 away from the column 21. The connecting part 221 of the column 21 is vertically fixedly connected to the fixing part 22 of the base 22, and the column 21 is vertically arranged on the side of the vertical beam away from the horizontal beam.

[0082] The connecting part 121 is located in the middle of the base 12, and the fixing parts 122 are symmetrically distributed at both ends of the connecting part 121, with the column 11 vertically disposed on the connecting part 121. A first protrusion 1211 is formed at the end of the connecting part 121 away from the column 11. The first protrusion 1211 is located on the side of the first circuit board 5 away from the heat sink, and the first protrusion 1211 is fixedly connected to the output terminal 41. The specific structure is the same as or similar to that described in Embodiments 3 and 4, and will not be repeated here.

[0083] The base 22 of the output copper pillar 2 is mounted on the side of the first circuit board 5 near the heat sink. Specifically, the base 22 of the output copper pillar 2 is located between the first circuit board 5 and the half-bridge module 4. Specifically, if the output copper pillar 2 is the output copper pillar described in Embodiment 3, a second protrusion 2211 is formed on the connecting part 221, and the second protrusion 2211 on the connecting part 221 of the base 22 is fixedly connected to the output terminal 41 of the half-bridge module 4. Specifically, a first through hole 2212 is also formed on the connecting part 221, and the projection of the pillar 21 on the base 22 does not include the second through hole 2212. The output copper pillar is fixed to the output terminal 41 by using bolts that pass through the first through hole 2212.

[0084] Since the fixing part 222 used to fix the output copper pillar 2 to the first circuit board 5 extends a certain distance from the pillar 21, when the current detection magnetic ring 7 is used to detect the current of the output copper pillar 2, the fixing bolt 541 will not affect the current detection magnetic ring 7. Therefore, there is no need to set up a second circuit board. The current detection magnetic ring 7 can be directly installed on the first circuit board 5, and the current detection magnetic ring 7 is sleeved on the outside of the output copper pillar 2.

[0085] like Figure 8 As shown, the assembly steps of the half-bridge module 4, the first circuit board 5, and the output terminal 2 include: step a, fixing the output terminal 41 of the half-bridge module 4 to the connection part 221 of the output copper pillar 2 with screws; step b, inserting the remaining terminals of the half-bridge module 4 into the first circuit board 5 and soldering them; step c, fixing the plastic body of the half-bridge module 4 to the heat sink 3 with bolts through the mounting holes 53 on the first circuit board; step d, connecting the output copper pillar 2 to the first circuit board 5 with fixing bolts 541, specifically, fixing the fixing part 222 of the base 22 to the first circuit board 5 with fixing bolts.

[0086] Specifically, the assembly method of the inverter assembly structure provided in this embodiment includes: a first method, step d → step b → step a → step c; a second method, step a → step c → step b → step d; and a third method, step a → step b → step c → step d.

[0087] Optionally, the method of fixing the output copper pillar 2 to the first circuit board 5 in step d may also include: soldering pads, setting protrusion-like pins on the output copper pillar 2 to achieve plug-in connection with the first circuit board 5, or other fixed connection methods.

[0088] The inverter assembly structure provided in this embodiment uses a fixed part 222 of the output copper column 2 that extends a certain distance from the column body 21, so that the distance between the column body 21 and the output terminal 41 extends outward, avoiding positional interference between the fixing bolt 541 and the current detection magnetic ring 7. Moreover, only the first circuit board 5 is needed, and there is no need to set up a second circuit board for installing the current detection magnetic ring 7. The assembly structure is simple and the operation steps are simple.

[0089] Example 6

[0090] This embodiment also provides an inverter assembly structure, which also includes: a heat sink 3; a half-bridge module 4; a first circuit board 5; and an output copper pillar 2, including a pillar body 21 and a base 22. The base 22 includes a connecting part 221 and a fixing part 222, and the fixing part 222 is fixedly connected to the first circuit board 5. Specifically, this embodiment differs from Embodiment 5 in that the connecting part 221 located below the pillar body 21 in this embodiment has an internal hole 213. Optionally, the internal hole 213 and the bolt hole in the lead-out end 211 of the pillar body 21 belong to the same through hole and are located on the same vertical line; alternatively, the internal hole 213 and the blind hole in the lead-out end 211 of the pillar body 21 are not on the same vertical line. The output terminal 41 and the internal hole 213 are fixedly connected by bolts to achieve a fixed connection between the output copper pillar 2 and the half-bridge module 4. Other structures are the same as or similar to Embodiment 5 and will not be described in detail.

[0091] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An output copper pillar for an inverter module, characterized by, include: The column includes a connecting end and a lead-out end, the lead-out end being used to connect to an external circuit; The base includes a connecting part and a fixing part. The connecting part is fixedly connected to the output terminal of the inverter module and fixedly connected to the connecting end of the column. The fixing part is fixedly connected to the circuit board of the inverter.

2. The output copper pillar for an inverter module of claim 1, wherein, The view from the column towards the base is defined as the top-view direction, and the top view of the base is I-shaped; wherein, the connecting part is centrally located along the base, and the fixing parts are symmetrically distributed at both ends of the connecting part.

3. The output copper pillar for an inverter module of claim 2, wherein, The end of the connecting portion away from the column has a first protrusion.

4. The output copper pillar for an inverter module of claim 1, wherein, The view from the column to the base is defined as the top-view direction, and the top view of the base is T-shaped; wherein, the connecting part is formed as a vertical beam; the fixing part is symmetrically arranged at both ends of the connecting part to form a horizontal beam, and the fixing part is located on the side of the connecting part away from the column.

5. The output copper pillar for an inverter module according to claim 4, characterized in that, A second protrusion is formed on the side of the connecting part away from the column.

6. The output copper pillar for an inverter module according to claim 4, characterized in that, A first through hole is also formed on the connecting part, and the projection of the column on the base does not include the first through hole.

7. The output copper pillar for an inverter module according to claim 1, characterized in that, The column body has a through hole or a blind hole inside, and the cavity wall of the through hole or the blind hole is threaded.

8. The output copper pillar for an inverter module according to any one of claims 1 to 7, characterized in that, Through holes are provided on the fixing parts located on both sides of the column, and the cavity walls of the through holes are provided with threads.

9. An assembly structure of an inverter, characterized by comprising: include: heat sink; An inverter module, including at least one output terminal, is mounted on the heat sink; The first circuit board is mounted on the side of the module away from the heat sink; The output copper column includes a column body and a base. The base includes a connecting part and a fixing part. The column body is fixedly connected to the connecting part of the base. The connecting part is fixedly connected to the output terminal. The fixing part is fixedly connected to the first circuit board.

10. The assembly structure of an inverter according to Claim 9, wherein The view from the column to the base is defined as the top view direction, and the top view of the base is I-shaped; wherein, the connecting part is centrally located along the base, the fixing parts are symmetrically distributed at both ends of the connecting part, and the column is vertically located on the connecting part.

11. The assembly structure of an inverter according to claim 10, wherein The base is located between the first circuit board and the heat sink.

12. The assembly structure of an inverter according to Claim 10, wherein The connecting part has a first protrusion at the end away from the column, the base is located on the side of the first circuit board away from the heat sink, and the first protrusion passes through the first circuit board and is fixedly connected to the output terminal.

13. The assembly structure of an inverter according to Claim 10, wherein Also includes: The second circuit board is located on the side of the first circuit board away from the heat sink; A current sensing magnetic ring is disposed on the second circuit board, and the current sensing magnetic ring is sleeved on the outside of the output copper pillar.

14. The assembly structure of an inverter according to Claim 9, wherein The view from the column to the base is defined as the top-view direction, and the top view of the base is T-shaped; wherein, the connecting part is formed as a vertical beam; the fixing part is symmetrically arranged at both ends of the connecting part to form a horizontal beam, and the fixing part is located on the side of the connecting part away from the column.

15. The inverter assembly structure according to claim 14, characterized in that, The base is located between the first circuit board and the heat sink.

16. The inverter assembly structure according to claim 15, characterized in that, A first through hole is formed on the connecting part, and the projection of the column on the base does not include the first through hole; the connecting part is fixedly connected to the output terminal through the first through hole.

17. The assembly structure of an inverter according to Claim 15, wherein The connecting portion located below the column has an internal hole; the connecting portion is fixedly connected to the output terminal through the internal hole.

18. The assembly structure of an inverter according to Claim 15, wherein It also includes a current sensing magnetic ring, which is disposed on the first circuit board and is sleeved on the outside of the copper pillar.

19. The assembly structure of an inverter according to Claim 9, wherein The fixing part is fixedly connected to the first circuit board by any one of bolt connection, welding, or plug-in connection.

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