Power unit
By using the design of a water-cooled bottom plate and a vertically connected water-cooled insert plate and thermal gasket in the power unit, the vertical arrangement and efficient heat dissipation of the IGBT power tubes are achieved, solving the problems of low space utilization and low power density in the prior art, and achieving a compact structure and efficient heat dissipation.
Patent Information
- Application Number
- CN202422232603.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-11
AI Technical Summary
In the prior art, the tiling method of IGBT power tubes in the power unit leads to low space utilization, low power density, large product size and high cost.
The water-cooled bottom plate is used to connect the water-cooled insert plate vertically, the thermal gasket is vertically attached to the side of the water-cooled insert plate, the IGBT power pipes are arranged vertically in sequence and fixed by fixing parts, and heat dissipation is performed in combination with the coolant circulation system.
The space utilization rate is improved, the power density is increased, the volume of the power unit is reduced, and the heat dissipation effect is good.
Smart Images
Figure CN223181147U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power electronics, in particular to a power unit. Background Art
[0002] In photovoltaic energy storage products, the layout of power devices inside the power unit is the core part of product development. A reasonable layout of power devices and heat dissipation devices can effectively improve the power density.
[0003] In photovoltaic energy storage products, most of the power devices in the power unit are Insulated-Gate Bipolar Transistors (IGBTs). In the prior art, IGBT power tubes in the power unit are mostly fixed on the heat dissipation device in a tiled manner. Such a structure is not compact, will waste a large amount of space above the IGBT power tubes, the space utilization rate is very low, and the power density is low, the product size is large, and thus the size of the external cabinet is large and the cost is high.
[0004] Therefore, there is an urgent need to develop a power unit with a simple and compact structure, high space utilization rate, high power density and small volume. Summary of the Utility Model
[0005] The purpose of the utility model is to avoid the deficiencies in the prior art and provide a power unit with a simple and compact structure, high space utilization rate, high power density and small volume, aiming to solve one of the above technical problems.
[0006] A power unit includes: a water-cooled bottom plate, a heat-conducting gasket, a plurality of IGBT power tubes, a fixing member, and a water-cooled plug board vertically connected to the water-cooled bottom plate. The water-cooled bottom plate is communicated with the water-cooled plug board. The heat-conducting gasket is vertically attached to the side surface of the water-cooled plug board. The IGBT power tubes are vertically arranged in sequence and attached to the outer side surface of the heat-conducting gasket. One end of the fixing member presses on the outer side surface of the IGBT power tube and the other end is fixed on the water-cooled plug board.
[0007] Preferably, the number of the above-mentioned heat-conducting gaskets is two. The two heat-conducting gaskets are respectively attached to the two side surfaces of the water-cooled plug board. The IGBT power tubes are vertically arranged in sequence and attached to the outer side surfaces of the two heat-conducting gaskets.
[0008] Preferably, the number of the above-mentioned water-cooled plug boards is two or more, and the water-cooled plug boards are arranged in parallel at intervals.
[0009] Preferably, the above-mentioned water-cooled base plate is provided with a first water inlet and a first water outlet. One end of the bottom of the water-cooled plug board is provided with a second water inlet, and the other end is provided with a second water outlet. At a position on the upper end of the water-cooled base plate near the first water inlet, a first water connection port is provided to cooperate and communicate with the second water inlet. At a position on the upper end of the water-cooled base plate near the first water outlet, a second water connection port is provided to cooperate and communicate with the second water outlet.
[0010] Preferably, fixing grooves are arranged at intervals between the two water-cooled plug boards on the above-mentioned water-cooled base plate. The power unit is further provided with a capacitor, and the capacitor is fixedly arranged in the fixing groove.
[0011] Preferably, the first pin of the above-mentioned IGBT power tube is arranged at the upper end of the IGBT power tube, the second pin of the capacitor is arranged at the upper end of the capacitor. The power unit is further provided with a PCB board, and the PCB board is fixedly arranged at the upper end of the water-cooled plug board in parallel with the water-cooled base plate. The first pin and the second pin are respectively electrically connected to the circuits on the bottom surface of the PCB board.
[0012] Preferably, at the lower position of the above-mentioned water-cooled plug board, there is a mounting plate with a thickness smaller than that of the IGBT power tube. The mounting plate is provided with a first threaded hole, and the fixing member is provided with a second threaded hole that cooperates with the first threaded hole. The power unit is further provided with a first screw that is sequentially screwed into the second threaded hole and the first threaded hole.
[0013] Preferably, the upper end of the above-mentioned water-cooled plug board is provided with a third threaded hole, and the PCB board is provided with a fourth threaded hole corresponding to the third threaded hole. The power unit is further provided with a second screw that is sequentially screwed into the fourth threaded hole and the third threaded hole; the upper end of the water-cooled base plate is provided with a fifth threaded hole, and the water-cooled plug board is provided with a sixth threaded hole corresponding to the fifth threaded hole. The power unit is further provided with a third screw that is sequentially screwed into the sixth threaded hole and the fifth threaded hole.
[0014] Preferably, the above-mentioned heat-conducting gasket is a ceramic substrate or an alumina heat-conducting gasket, and the heat-conducting gasket is attached to both side surfaces of the water-cooled plug board through an insulating adhesive.
[0015] Preferably, the above-mentioned capacitor is fixedly arranged in the fixing groove through a heat-conducting potting adhesive.
[0016] The utility model has the following advantages compared with the prior art: The water-cooled plug board of the power unit of the utility model is vertically connected and communicated with the water-cooled bottom board. The heat-conducting gasket is vertically attached to the side surface of the water-cooled plug board. A plurality of IGBT power tubes are vertically arranged and attached to the outer side surface of the heat-conducting gasket in sequence. Finally, the IGBT power tubes are limited and fixed on the outer side surface of the heat-conducting gasket through fixing parts. The heat-conducting gasket can play the roles of insulation and heat conduction. That is, the IGBT power tubes of the power unit of the utility model are vertically arranged. Compared with the prior art where the IGBT power tubes are arranged in a flat manner, the arrangement structure of the IGBT power tubes of the power unit of the utility model is more compact, and it will not waste the space above the IGBT power tubes as in the prior art. The space utilization rate is very high. More IGBT power tubes can be arranged in a unit space, the power density is large, and the volume of the power unit is smaller under the same power condition. Moreover, the IGBT power tubes of the power unit of the utility model are attached to the side surface of the water-cooled plug board through the heat-conducting gasket, and the heat dissipation effect is very good. Description of the Drawings
[0017] The present utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model.
[0018] Figure 1 It is a schematic structural diagram of a power unit of the present utility model;
[0019] Figure 2 It is a schematic structural diagram of a power unit of the present utility model without a PCB board installed;
[0020] Figure 3 It is a schematic installation structure diagram of a water-cooled plug board, a heat-conducting gasket and IGBT power tubes of a power unit of the present utility model;
[0021] Figure 4 It is a schematic structural diagram of a power unit of the present utility model with only capacitors installed. Detailed Embodiments
[0022] The present utility model will be further described in conjunction with the following embodiments and the accompanying drawings:
[0023] A power unit, as Figures 1 to 4 shown, includes: a water-cooled bottom board 10, a heat-conducting gasket 11, a plurality of IGBT power tubes 12, fixing parts 13, and a water-cooled plug board 14 vertically connected to the water-cooled bottom board 10. The water-cooled bottom board 10 is communicated with the water-cooled plug board 14. The heat-conducting gasket 11 is vertically attached to the side surface of the water-cooled plug board 14. The IGBT power tubes 12 are vertically arranged and attached to the outer side surface of the heat-conducting gasket 11 in sequence. One end of the fixing part 13 presses on the outer side surface of the IGBT power tube 12, and the other end is fixed on the water-cooled plug board 14.
[0024] The water-cooled insertion plate 14 of the power unit of the present utility model is vertically connected and communicated with the water-cooled bottom plate 10. The heat-conducting gasket 11 is vertically attached to the side surface of the water-cooled insertion plate 14. A plurality of IGBT power tubes 12 are vertically arranged in sequence and attached to the outer side surface of the heat-conducting gasket 11. Finally, the IGBT power tubes 12 are limited and fixed to the outer side surface of the heat-conducting gasket 11 through the fixing member 13. The heat-conducting gasket 11 can play the roles of insulation and heat conduction. That is, the IGBT power tubes 12 of the power unit of the present utility model are vertically arranged. Compared with the prior art in which the IGBT power tubes 12 are arranged flatly, the arrangement structure of the IGBT power tubes 12 of the power unit of the present utility model is more compact, and it will not waste the space above the IGBT power tubes 12 as in the prior art. The space utilization rate is very high. More IGBT power tubes 12 can be arranged in a unit space, the power density is large, and the volume of the power unit is smaller under the same power. Moreover, the IGBT power tubes 12 of the power unit of the present utility model are attached to the side surface of the water-cooled insertion plate 14 through the heat-conducting gasket 11, and the heat dissipation effect is very good.
[0025] The number of the fixing members 13 can be set according to its structure. In the embodiment of the present application, one fixing member 13 fixes two IGBT power tubes 12. Of course, the fixing member 13 can be set to other structures according to needs. The heat-conducting gasket 11 can play the roles of insulation and heat conduction. Specifically, the heat-conducting gasket 11 can be a ceramic substrate or an alumina heat-conducting gasket 11. Of course, it can also be a heat-conducting gasket 11 made of other heat-conducting and insulating materials in the prior art.
[0026] Preferably, as Figures 1 to 4 shown, the number of the heat-conducting gaskets 11 is two. The two heat-conducting gaskets 11 are respectively attached to the two side surfaces of the water-cooled insertion plate 14. The IGBT power tubes 12 are vertically arranged in sequence and attached to the outer side surfaces of the two heat-conducting gaskets 11. Specifically, the heat-conducting gaskets 11 can be attached to the two side surfaces of the water-cooled insertion plate 14 through insulating glue. That is, the IGBT power tubes 12 are vertically attached to both side surfaces of the water-cooled insertion plate 14. In this way, more IGBT power tubes 12 can be arranged in a unit space, so that the power density of the power unit can be further improved. The arrangement of the IGBT power tubes 12 makes the structure of the power unit more compact; and the IGBT power tubes 12 are all attached to the two side surfaces of the water-cooled insertion plate 14 through the heat-conducting gaskets 11, and the heat dissipation effect is good.
[0027] Preferably, as Figure 1 and Figure 2As shown, the number of water-cooled inserts 14 is two or more, and the water-cooled inserts 14 are arranged in parallel at intervals. The number of water-cooled inserts 14 can be set as required. The water-cooled inserts 14 are arranged in parallel at intervals, with a neat, beautiful and reasonable layout. There are two or more water-cooled inserts 14, and IGBT power tubes 12 are attached to both side surfaces of each water-cooled insert 14. In this way, more IGBT power tubes 12 can be arranged in a power unit, greatly improving the power density of the power unit and making the structure more compact.
[0028] Preferably, as Figures 1 to 4 shown, the water-cooled bottom plate 10 is provided with a first water inlet 15 and a first water outlet 16. One end of the bottom of the water-cooled insert 14 is provided with a second water inlet (not marked in the figure), and the other end is provided with a second water outlet (not marked in the figure). A first water connection port 17 that cooperates and communicates with the second water inlet (not marked in the figure) is provided at a position on the upper end of the water-cooled bottom plate 10 near the first water inlet 15. A second water connection port 18 that cooperates and communicates with the second water outlet (not marked in the figure) is provided at a position on the upper end of the water-cooled bottom plate 10 near the first water outlet 16.
[0029] The coolant flows into the water-cooled bottom plate 10 through the first water inlet 15. A part of the coolant flows into the water-cooled insert 14 through the first water connection port 17 and the second water inlet (not marked in the figure), and after passing through the water-cooled insert 14, it flows back to the water-cooled bottom plate 10 through the second water outlet (not marked in the figure) and the second water connection port 18, and finally flows out of the water-cooled bottom plate 10 through the first water outlet 16, thereby realizing the heat dissipation of the IGBT power tubes 12 attached to both sides of the water-cooled insert 14; another part of the coolant passes through the water-cooled bottom plate 10 and finally flows out of the water-cooled bottom plate 10 through the first water outlet 16. The heat dissipation circuit is reasonable and the heat dissipation effect is good. Specifically, the coolant can be cooling water, and of course, it can also be set as other cooling liquids according to needs.
[0030] Preferably, as Figure 2 and Figure 4 shown, fixing grooves 19 are arranged at intervals between the two water-cooled inserts 14 on the water-cooled bottom plate 10. The power unit is also provided with a capacitor 20, and the capacitor 20 is fixedly arranged in the fixing groove 19.
[0031] The gap between the water-cooled inserts 14 is fully utilized to intersperse and arrange the capacitor 20. The capacitor 20 is fixed on the water-cooled bottom plate 10 through the fixing groove 19, and the heat of the capacitor 20 can be dissipated through the water-cooled bottom plate 10, which can quickly reduce the heat generated by the operation of the capacitor 20, and the heat dissipation effect is good.
[0032] Specifically, the capacitor 20 can be fixedly arranged in the fixing groove 19 through heat-conducting potting glue. The heat-conducting potting glue has a good fixing effect and a good heat-conducting effect, which is beneficial to conducting the heat of the capacitor 20 to the water-cooled bottom plate 10 and taking away the heat through the water-cooled bottom plate 10.
[0033] Preferably, if Figures 1 to 4 As shown, the first pin 21 of the IGBT power tube 12 is set at the upper end of the IGBT power tube 12, and the second pin 22 of the capacitor 20 is set at the upper end of the capacitor 20. The power unit is also provided with a PCB board 23. The PCB board 23 is fixed to the upper end of the water-cooling plug-in board 14 in parallel with the water-cooling base plate 10. The first pin 21 and the second pin 22 are respectively electrically connected to the circuit on the bottom surface of the PCB board 23.
[0034] The PCB board 23 is fixed to the upper end of the water-cooled insert 14 in parallel with the water-cooled base plate 10, which can effectively utilize the space above the water-cooled insert 14. Multiple water-cooled inserts 14 can provide good support for the PCB board 23. In addition, the first pin 21 of the IGBT power tube 12 is set at the upper end of the IGBT power tube 12, and the second pin 22 of the capacitor 20 is set at the upper end of the capacitor 20. This can facilitate the connection of the IGBT power tube 12 and the capacitor 20 to the PCB board 23 fixed to the upper end of the water-cooled insert 14, cleverly shortening the wiring length and making the structure reasonable, compact and reliable. At the same time, the IGBT power tube 12 and the capacitor 20 can also support and fix the PCB board 23, fixing each other in position, further improving the strength, greatly reducing the occurrence of PCB board 23 displacement failure under transportation vibration environment, and improving the reliability of the power unit.
[0035] Preferably, if Figures 1 to 3 As shown, a mounting plate 24 having a thickness less than that of the IGBT power tube 12 is provided at the lower portion of the water-cooling plug 14. The mounting plate 24 is provided with a first threaded hole 25. The fixing member 13 is provided with a second threaded hole (not shown in the figure) that cooperates with the first threaded hole 25. The power unit is also provided with a first screw 26 that is screwed into the second threaded hole (not shown in the figure) and the first threaded hole 25 in sequence.
[0036] The thickness of mounting plate 24 is smaller than that of IGBT power tube 12. When one end of fixing member 13 is secured to mounting plate 24, the other end of fixing member 13 can further compress and retain IGBT power tube 12, making it more securely and reliably fixed to the outside of thermal pad 11. The IGBT power tube 12 is secured to the outside of thermal pad 11 by first screw 26, which is screwed sequentially into second threaded hole (not shown) and first threaded hole 25. This simple, secure, and easy-to-install fixing structure ensures a reliable and secure fit.
[0037] Preferably, if Figure 1 and Figure 2As shown, a third threaded hole 27 is provided at the upper end of the water-cooled plug board 14, a fourth threaded hole 28 corresponding to the third threaded hole 27 is provided on the PCB board 23, and the power unit is further provided with a second screw 29 that is sequentially screwed into the fourth threaded hole 28 and the third threaded hole 27; a fifth threaded hole 30 is provided at the upper end of the water-cooled bottom plate 10, a sixth threaded hole 31 corresponding to the fifth threaded hole 30 is provided on the water-cooled plug board 14, and the power unit is further provided with a third screw 32 that is sequentially screwed into the sixth threaded hole 31 and the fifth threaded hole 30.
[0038] The PCB board 23 is fixed to the upper end of the water-cooled plug board 14 through the structure of sequentially screwing the second screw 29 into the fourth threaded hole 28 and the third threaded hole 27. The fixing structure is simple, firm and reliable, and the installation operation is convenient. The water-cooled plug board 14 is fixed to the water-cooled bottom plate 10 through the structure of sequentially screwing the third screw 32 into the sixth threaded hole 31 and the fifth threaded hole 30. The fixing structure is simple, firm and reliable, and the installation operation is convenient.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A power unit, characterized in that, Including: A water-cooled bottom plate, a heat-conducting gasket, a plurality of IGBT power tubes, a fixing member, and a water-cooled insertion plate vertically connected to the water-cooled bottom plate. The water-cooled bottom plate is communicated with the water-cooled insertion plate. The heat-conducting gasket is vertically attached to the side surface of the water-cooled insertion plate. The IGBT power tubes are vertically arranged in sequence and attached to the outer side surface of the heat-conducting gasket. One end of the fixing member presses on the outer side surface of the IGBT power tube, and the other end is fixed on the water-cooled insertion plate.
2. The power unit according to claim 1, wherein: The number of the heat-conducting gaskets is two. The two heat-conducting gaskets are respectively attached to the two side surfaces of the water-cooled insertion plate. The IGBT power tubes are vertically arranged in sequence and attached to the outer side surfaces of the two heat-conducting gaskets.
3. The power unit according to claim 2, wherein: The number of the water-cooled insertion plates is two or more, and the water-cooled insertion plates are arranged in parallel at intervals.
4. A power unit according to claim 3, characterized in that: The water-cooled bottom plate is provided with a first water inlet and a first water outlet. One end of the bottom of the water-cooled insertion plate is provided with a second water inlet, and the other end is provided with a second water outlet. At a position near the first water inlet at the upper end of the water-cooled bottom plate, a first water connection port is provided for cooperating and communicating with the second water inlet. At a position near the first water outlet at the upper end of the water-cooled bottom plate, a second water connection port is provided for cooperating and communicating with the second water outlet.
5. A power unit according to claim 4, characterized in that: Fixing grooves are arranged at intervals between the two water-cooled insertion plates on the upper surface of the water-cooled bottom plate. The power unit is further provided with a capacitor, and the capacitor is fixedly arranged in the fixing groove.
6. A power unit according to claim 5, characterized in that: The first pin of the IGBT power tube is arranged at the upper end of the IGBT power tube. The second pin of the capacitor is arranged at the upper end of the capacitor. The power unit is further provided with a PCB board, and the PCB board is fixedly arranged parallel to the water-cooled bottom plate at the upper end of the water-cooled insertion plate. The first pin and the second pin are respectively electrically connected to the circuits on the bottom surface of the PCB board.
7. A power unit according to claim 6, characterized in that: An installation plate with a thickness smaller than that of the IGBT power tube is arranged at the lower part of the water-cooled insertion plate. The installation plate is provided with a first threaded hole. The fixing member is provided with a second threaded hole matching the first threaded hole. The power unit is further provided with a first screw sequentially screwed into the second threaded hole and the first threaded hole.
8. A power unit according to claim 7, characterized in that: The upper end of the water-cooled insertion plate is provided with a third threaded hole. The PCB board is provided with a fourth threaded hole corresponding to the third threaded hole. The power unit is further provided with a second screw sequentially screwed into the fourth threaded hole and the third threaded hole. The upper end of the water-cooled bottom plate is provided with a fifth threaded hole. The water-cooled insertion plate is provided with a sixth threaded hole corresponding to the fifth threaded hole. The power unit is further provided with a third screw sequentially screwed into the sixth threaded hole and the fifth threaded hole.
9. The power unit according to claim 8, characterized in that: The heat-conducting gasket is a ceramic substrate or an alumina heat-conducting gasket, and the heat-conducting gasket is attached to the two side surfaces of the water-cooled insertion plate through an insulating adhesive.
10. A power unit according to claim 9, characterized in that: The capacitor is fixedly arranged in the fixing groove through a heat-conducting potting adhesive.