Dual-sided water-cooled power module and combined dual-sided water-cooled power module

Abstract

A combined double-sided water-cooled power module, comprising an insulating board and a double-sided water-cooled power module. The double-sided water-cooled power module includes a first electrode plate with a first cooling water channel provided therein, an insulating base disposed on the first electrode plate from bottom to top, a power chip, a second electrode plate, a gasket assembly, and an insulating housing. It is characterized in that: a second cooling water channel is provided in the second electrode plate, and the inlet and outlet of the second cooling water channel are exposed outside the insulating housing to form a water channel interface. Through the water channel interface, the cooling water channels of the second electrode plates of two adjacent double-sided water-cooled power modules are hermetically connected. The surface of the second electrode plate corresponding to the water channel interface is the electrical connection contact surface of the second electrode plates of two adjacent double-sided water-cooled power modules. The inlet and outlet of the first cooling water channel of the first electrode plate are located at the bottom surface of the first electrode plate. The present invention combines the water circuit and the electric circuit into one, has a compact structure, a small volume, saves materials, can be arbitrarily combined according to the use requirements, is convenient for maintenance and replacement, and facilitates circuit connection.

Description

Technical Field

[0001] The present invention relates to the field of power modules, and in particular to a double-sided water-cooled power module and a combined double-sided water-cooled power module. Background Art

[0002] High-power semiconductor device modules have high power, high power consumption, and serious heat generation. Therefore, in actual use, the modules must be installed on specially designed radiators. Heat is dissipated through the radiator to reduce the temperature of the device and ensure that the junction temperature of the power semiconductor device is within the allowable range. The vertical double-sided water-cooled power semiconductor device module has the characteristics of convenient use, easy installation, compact structure, space saving, cost reduction, and good heat dissipation effect, and can improve the power of the semiconductor device module. However, since the two die assemblies are integrated together, the arrangement of water pipes and electrodes is complex, and the installation process involves repeated operations, resulting in inconvenient installation and maintenance; the two die assemblies are connected by copper bars, and if one die breaks down, the entire module needs to be replaced, resulting in high maintenance costs. Summary of the Invention

[0003] The present invention aims to solve the above problems existing in the prior art, and provides a double-sided water-cooled power module and a combined double-sided water-cooled power module.

[0004] The technical solution of the present invention is: a double-sided water-cooled power module, including a first electrode plate with a first cooling water channel inside, an insulating base, a power chip, a second electrode plate, a gasket assembly, and an insulating housing arranged on the first electrode plate from bottom to top. The special feature is that: a second cooling water channel is provided in the second electrode plate, and the inlet and outlet of the second cooling water channel are exposed outside the insulating housing to form water channel interfaces. The cooling water channels of the second electrode plates of two adjacent double-sided water-cooled power modules are hermetically connected through the water channel interfaces. The surface of the second electrode plate corresponding to the water channel interface is the electrical connection contact surface of the second electrode plates of two adjacent double-sided water-cooled power modules. The inlet and outlet of the first cooling water channel of the first electrode plate are located on the bottom surface of the first electrode plate.

[0005] Further, the inlet and outlet of the second cooling water channel are located on the side end surface of the second electrode plate.

[0006] Further, the inlet and outlet of the second cooling water channel protrude from the insulating housing.

[0007] Further, an inlay groove is provided at the position of the inlet and / or outlet of the second cooling water channel.

[0008] Further, the power chip is a thyristor or a rectifier tube.

[0009] A combined double-sided water-cooled power module includes an insulating board. The special feature is that at least two of the above-mentioned double-sided water-cooled modules are arranged on the insulating board. The two adjacent electrode plates one with equal potential are electrically connected and water-channel connected through a detachable water-electricity connector one with a communicated water channel inside. The electrode plate one is hermetically connected to the position of the corresponding cooling water channel one of the water-electricity connector one, and the water-electricity connector one passes through the lower surface of the insulating board. The two adjacent electrode plates two with equal potential are directly butted in a detachable manner or indirectly butted through a detachable water-electricity connector two with a communicated water channel inside, so as to realize electrical connection and water-channel connection between the two butted electrode plates two. The inlets and outlets of the connected cooling water channel one and cooling water channel two are respectively installed with a water nozzle one and a water nozzle two. The water-electricity connector one and the water-electricity connector two are respectively a water-electricity connection block or a water-electricity connection pipe made of a conductive material.

[0010] Further, the water-electricity connector one is a water-electricity connection block. The butt joint surfaces between the electrode plate one and the water-electricity connector one, the butt joint surfaces of the two directly butted electrode plates two, or the butt joint surfaces of the two indirectly butted electrode plates two and the corresponding water-electricity connector two are connected by fastening bolts. The water-electricity connector two is a water-electricity connection block.

[0011] Further, the butt joint surface between the electrode plate one and the water-electricity connector one corresponding to the position of the cooling water channel one is also provided with an inlaid groove, and a sealing rubber ring is inlaid in the inlaid groove.

[0012] Further, at least one more of the above-mentioned double-sided water-cooled power modules is additionally arranged on the upper surface of the insulating board. The potential of the electrode plate one and / or the electrode plate two in the additionally arranged double-sided water-cooled power module is not equal to that of the adjacent and corresponding electrode plates with equal potential. A detachable water-channel connector made of an insulating material and having a communicated water channel inside is arranged between the electrode plate of the additionally arranged double-sided water-cooled power module and the adjacent electrode plates with unequal potential to realize water-channel connection. The water-channel connector is an insulating connection block or an insulating water pipe. The electrode plate of the additionally arranged double-sided water-cooled power module and the adjacent electrode plates with equal potential realize water-channel connection and equal-potential electrical connection through the corresponding water-electricity connector one or water-electricity connector two.

[0013] Further, the water-electricity connector one is installed on the bottom surface of the electrode plate one and bridges between the two adjacent electrode plates one.

[0014] Advantages of the present invention: The adjacent two electrode plates I are connected by the water and electricity connector I, and two adjacent electrode plates II are directly butted or indirectly butted through the water and electricity connector II, realizing the integration of the water circuit and the electric circuit. The structure is compact, the volume is small, the material is saved, and the production cost is reduced. The water and electricity connector can be made of metal materials such as copper, aluminum, and copper-aluminum composite. It can be arbitrarily combined according to the use requirements, which is convenient for maintenance and replacement, and reduces the maintenance and use costs. It has good sealing performance and is convenient for connection. The power chip can have the anode on the top or the cathode on the top, which is convenient for circuit connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the exploded view of the double-sided water-cooled power module of Embodiment 1;

[0016] Figure 2 is the schematic structural diagram of the cooling water channel II of the electrode plate II in Embodiment 1;

[0017] Figure 3 is the schematic structural diagram of the combined double-sided water-cooled power module of Embodiment 2;

[0018] Figure 4 is Figure 3 the bottom view of;

[0019] Figure 5 is the schematic connection structure diagram of the cooling water channel I of the electrode plate I in Embodiment 2;

[0020] Figure 6 is the schematic connection structure diagram of the water and electricity connector I and the electrode plate I in Embodiment 2;

[0021] Figure 7 is the schematic diagram of the direct butt joint structure of the electrode plate II in Embodiment 2;

[0022] Figure 8 is the circuit schematic diagram of the combined double-sided water-cooled power module of Embodiment 2;

[0023] Figure 9 is the schematic connection structure diagram of the water and electricity connector II and the adjacent electrode plate II in Embodiment 3;

[0024] Figure 10 is the schematic structural diagram of the combined double-sided water-cooled power module of Embodiment 4;

[0025] Figure 11 is Figure 10 the rear view of;

[0026] Figure 12 is the circuit schematic diagram of the combined double-sided water-cooled power module of Embodiment 4;

[0027] Figure 13 is the circuit schematic diagram of the double-sided water-cooled power module 2 as an AC switch;

[0028] Figure 14 It is the circuit schematic diagram of the double-sided water-cooled power module 2 as a two-phase rectifier bridge.

[0029] In the figure: insulating plate - 1, double-sided water-cooled module - 2, output electrode connector - 3, water and electricity connector II - 4, water nozzle II - 5, water nozzle I - 6, input electrode connector - 7, water and electricity connector I - 8, fastening bolt - 9, sealing rubber ring - 10, waterway connector - 11, water and electricity connecting pipe - 12, water nozzle I connecting seat - 13, insulating base - 201, insulating housing - 202, spring washer - 203, insulating pad - 204, flat washer - 205, power chip - 206, pressure iron - 207, sleeve - 208, fastening screw - 209, long bolt - 210, electrode plate I - 211, electrode plate II - 212, cooling water channel I - 213, cooling water channel II - 214. Specific implementation mode

[0030] Example 1

[0031] As Figure 1 and Figure 2 shown, the double-sided water-cooled power module includes electrode plate I 211, insulating base 201, power chip 206, electrode plate II 212, pressure pad assembly and insulating housing 202 which are arranged on electrode plate I 211 from bottom to top. The pressure pad assembly includes insulating pad 204, flat washer 205, spring washer 203 and pressure iron 207. The pressure iron 207 is fastened on electrode plate I 211 by a long bolt 210 sleeved on a sleeve 208. The insulating housing 202 is fixed on the pressure iron 207 by a fastening screw 209. The power chip 206 is a thyristor (or rectifier tube). Cooling water channel I 213 and cooling water channel II 214 are respectively arranged in electrode plate I 211 and electrode plate II 212. The inlet and outlet of the cooling water channel II 214 are located on the side end face of the electrode plate II 212 and are exposed and protrude outside the insulating housing 202 to form a water channel interface. The cooling water channels of the electrode plate II 212 of two adjacent double-sided water-cooled power modules are hermetically connected through the water channel interface. The surface of the electrode plate II corresponding to the water channel interface part is the electrical connection contact surface of the electrode plates II of two adjacent double-sided water-cooled power modules. The inlet and outlet of the cooling water channel I of the electrode plate I are located at the bottom surface of the electrode plate I. The inlet and outlet of the cooling water channel II 214 are located on the side end face of the electrode plate II 212 and protrude outside the insulating housing 202. Mosaic grooves 215 are arranged at the inlet and outlet of the cooling water channel II 214 on the same side of the electrode plate II.

[0032] Example 2

[0033] As Figure 3 - Figure 7As shown in the figure, the combined double-sided water-cooled power module includes six double-sided water-cooled modules 2 as described above. The six double-sided water-cooled modules 2 are fixed to the insulating plate 1 by fastening bolts. The six electrode plates 1 211 are divided into three groups, and two electrode plates 1 in each group are equipotential. A water-electricity connector 1 8 with an internal water channel is bridged between two adjacent equipotential electrode plates 1 211 by a fastening bolt 9. The water-electricity connector 1 8 is a water-electricity connection block (or water-electricity connection pipe) made of a conductive material, and the water-electricity connector 1 8 passes through the back of the insulating plate 1. Embedding grooves are provided at the inlet and outlet of the cooling water channel 1 213 on the side of the water-electricity connector 1 corresponding to the bridging surface between the water-electricity connector 1 and the electrode plate 1. A sealing rubber ring 10 is embedded in the embedding groove. The water channel ports of the water-electricity connector 1 8 and the inlet and outlet of the cooling water channel 1 213 of the electrode plate 1 are located on the bridging surface between the water-electricity connector 1 8 and the electrode plate 1 and are hermetically connected to each other. Through the water-electricity connector 1 8, equipotential electrical connection and water channel connection are achieved between two adjacent equipotential electrode plates 1 211. Input electrode connectors 7 for accessing three-phase electricity of A, B, and C are provided on the surface of the water-electricity connector 1 8. In this embodiment, the electrode plate 1 211 for externally connecting a water nozzle is L-shaped, and the protruding part of the electrode plate 1 211 passes through the back of the insulating plate 1. The inlet and outlet of the connected cooling water channel 1 are connected to a water nozzle 1 6. Cooling water flows out from the water nozzle 1 6 at the outlet end after passing through the inlet water channel of the cooling water channel 1 213 of the proximal electrode plate 1, the inlet water channel in the water-electricity connector 1 8, the inlet water channel of the cooling water channel 1 213 of the distal electrode plate 1, the outlet water channel in the water-electricity connector 1 8, and the outlet water channel of the cooling water channel 1 213 of the proximal electrode plate 1.

[0034] The electrode plates 2 212 in the combined double-sided water-cooled power module are divided into two groups, and three electrode plates 2 in each group are equipotential. Electrical connection and water channel connection are directly achieved by butt-jointing between two adjacent equipotential electrode plates 2 212 in each group through a fastening bolt 9. A sealing rubber ring 10 is also embedded in the embedding groove 215. Water nozzles 2 5 are installed at the inlet and outlet of the connected cooling water channel 2 214. Cooling water flows through the cooling water channel 2 214 of the equipotential electrode plates 2 212 in sequence from the water nozzle 2 5 at the inlet end and flows out through the water nozzle 2 5 at the outlet end. Output electrode connectors 3 are installed on two groups of equipotential electrode plates 1 211 for outputting direct current.

[0035] This combined double-sided water-cooled power module serves as a three-phase rectifier bridge (thyristors VT1-VT6), and its circuit structure is as Figure 8 shown.

[0036] Embodiment 3

[0037] As Figure 9As shown, the two adjacent electrode plates 212 at the same potential are indirectly butted through the water and electricity connector 4. The water and electricity connector 4 is connected to the adjacent electrode plate 212 through a fastening bolt to achieve the electrical connection and waterway connection of the electrode plates at the same potential. A sealing rubber ring is arranged at the position corresponding to the cooling water channel 214 on the butting surface between the water and electricity connector 4 and the adjacent electrode plate 212, and the rest of the structure is the same as that of Embodiment 1.

[0038] Embodiment 4

[0039] As Figure 10 、 Figure 11 shown, another double-sided water-cooled power module as described in Embodiment 1 is further arranged on the insulating board 1. This double-sided water-cooled power module serves as a freewheeling diode. In the double-sided water-cooled power module serving as a freewheeling diode, the potential of the first electrode plate is equal to that of the first equal-potential electrode plate 211, and the electrical connection and waterway connection are achieved through the conductive water pipe 12 therebetween. The potential of the second electrode plate in the double-sided water-cooled power module serving as a freewheeling diode is not equal to that of the adjacent second equal-potential electrode plate 212, and the waterway connection is achieved through the detachable waterway connector 11 (or insulating water pipe) made of insulating material and connected by a fastening bolt therebetween. The waterway connector 11 has the same structure as the water and electricity connector 4. The rest of the structure is the same as that of Embodiment 2. This combined double-sided water-cooled power module serves as a three-phase AC switch (thyristors VT1-VT6) with a freewheeling diode VT7, and its circuit structure is as Figure 12 shown.

[0040] Embodiment 5

[0041] The double-sided water-cooled power module 2 has two in total (thyristors VT1 and VT2 respectively) and serves as an AC switch, as Figure 13 shown; or the power module has four in total (thyristors VT1, VT2, VT3, and VT4 respectively) and serves as a two-phase rectifier bridge (A, B in), as Figure 14 shown; or a single-phase inverter circuit (A, B out).

Claims

1. Combined double-sided water-cooled power module, comprising an insulating plate and a double-sided water-cooled power module. The double-sided water-cooled power module includes an electrode plate 1 with a cooling water channel 1 inside, an insulating base arranged on the electrode plate 1 from bottom to top, a power chip, an electrode plate 2, a gasket assembly and an insulating housing. A cooling water channel 2 is arranged in the electrode plate 2. The inlet and outlet of the cooling water channel 2 are exposed outside the insulating housing to form a water channel interface. Through the water channel interface, the cooling water channels of the electrode plates 2 of two adjacent double-sided water-cooled power modules are hermetically connected. The surface of the electrode plate 2 corresponding to the water channel interface is the electrical connection contact surface of the electrode plates 2 of two adjacent double-sided water-cooled power modules. The inlet and outlet of the cooling water channel 1 of the electrode plate 1 are located at the bottom surface of the electrode plate 1. It is characterized in that: At least two of the double-sided water-cooled power modules are arranged on the upper surface of the insulating board. The two adjacent electrode plates one with equal potential are electrically connected and waterway-connected through a detachable water and electricity connector one with a communicating waterway inside. The electrode plate one is hermetically connected to the position of the cooling waterway one of the water and electricity connector one, and the water and electricity connector one penetrates out from the lower surface of the insulating board. The two adjacent electrode plates two with equal potential are directly butted in a detachable manner or indirectly butted through a detachable water and electricity connector two with a communicating waterway inside, so that electrical connection and waterway connection are realized between the two butted electrode plates two. The water and electricity connector one and the water and electricity connector two are respectively a water and electricity connection block or a water and electricity connection pipe made of a conductive material.

2. The combined double-sided water-cooled power module according to claim 1, characterized in that: The water and electricity connector one is a water and electricity connection block. The butting surfaces between the electrode plate one and the water and electricity connector one, the butting surfaces of the two directly butted electrode plates two, or the butting surfaces of the two indirectly butted electrode plates two and the corresponding water and electricity connector two are connected by fastening bolts. The water and electricity connector two is a water and electricity connection block.

3. The combined double-sided water-cooled power module according to claim 2, characterized in that: The butting surface between the electrode plate one and the water and electricity connector one is provided with an inlaid groove one corresponding to the position of the cooling waterway one, and a sealing rubber ring is inlaid in the inlaid groove one.

4. The combined double-sided water-cooled power module according to claim 1, characterized in that: in At least one more of the double-sided water-cooled power modules is additionally arranged on the upper surface of the insulating board. The potential of the electrode plate one and / or the electrode plate two in the additionally arranged double-sided water-cooled power module is not equal to that of the adjacent and corresponding electrode plates with equal potential. And a detachable waterway connector made of an insulating material and having a communicating waterway inside is arranged between the electrode plate of the additionally arranged double-sided water-cooled power module and the adjacent electrode plate with unequal potential to realize waterway connection. The waterway connector is an insulating connection block or an insulating water pipe. The electrode plate of the additionally arranged double-sided water-cooled power module and the adjacent electrode plate with equal potential realize waterway connection and equal-potential electrical connection through the corresponding water and electricity connector one or water and electricity connector two.

5. The combined double-sided water-cooled power module according to claim 1 or 2, characterized in that: The water and electricity connector one is installed on the bottom surface of the electrode plate one and bridges between two adjacent electrode plates one.

6. The combined double-sided water-cooled power module according to claim 1, characterized in that: The inlet and outlet of the cooling waterway two are located on the side end faces of the electrode plate two.

7. The combined double-sided water-cooled power module according to claim 1 or 6, characterized in that: The inlet and outlet of the cooling waterway two protrude from the insulating shell.

8. The combined double-sided water-cooled power module according to claim 1 or 6, characterized in that: An inlaid groove two is provided at the position of the inlet or outlet of the cooling waterway two.

9. The combined double-sided water-cooled power module according to claim 1, characterized in that: The power chip is a thyristor or a rectifier tube.

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