An integrated potting power module, electrical equipment and vehicle

Abstract

The present invention provides an integrated potted power module, electrical equipment, and vehicle, comprising a liquid-cooled bridge tube, multiple power tubes, and a potting shell. A liquid-cooled flow channel is provided in the liquid-cooled bridge tube along its length. The liquid-cooled bridge tube is provided with liquid-cooling interfaces at both ends of the liquid-cooling flow channel in the length direction. The packages of the multiple power tubes are thermally connected to the outer wall of the liquid-cooled bridge tube by means of a potting shell. The potting shell is filled with potting glue, which is wrapped around the packages of the multiple power tubes. The liquid-cooling interfaces and the pins of the multiple power tubes are all located outside the potting shell. Through the thermal conduction connection between the power tubes and the liquid-cooled bridge tube, waste heat from the power tubes can be efficiently conducted to the liquid-cooled bridge tube for heat dissipation. The potting shell is surrounded by the liquid-cooled bridge tube and the multiple power tubes, and the potting glue therein is used to wrap around the packages of the multiple power tubes, thereby further improving heat conduction efficiency and protection.

Description

Technical Field

[0001] The present invention relates to the field of new energy equipment, and in particular to an integrally encapsulated power module, electrical equipment and vehicle. Background Art

[0002] New energy vehicles do not generate power by burning gasoline or diesel, so they have many characteristics such as environmental protection and low pollution. With the vigorous promotion and application of new energy power generation such as hydropower, wind power, solar power and nuclear power, many new energy vehicles are gradually being promoted and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail vehicles, new energy electric flying vehicles, new energy electric shipping vehicles, etc.

[0003] These vehicles typically include electrical equipment such as a motor controller, an onboard charger, an onboard power supply, an inverter, or a transformer. Taking the motor controller as an example, the power unit within the motor controller receives DC power from the battery and inverts it into AC power for output to the motor. Therefore, each power module corresponds to one phase of a three-phase motor and is used to output one of the three phases (U, V, and W) of power to the motor. Each power module is equipped with two terminals for receiving DC power, one for receiving positive and one for receiving negative power, and a current output terminal for outputting a current signal to one phase of the motor. Furthermore, controllable switching devices, such as power transistors and capacitors, are required between the two DC power terminals and the current output terminal. The power transistors can be thyristors or IGBTs, etc., for controlling the DC power. During operation, the power transistors generate waste heat, so heat dissipation is generally required.

[0004] The existing technical means for dissipating heat from power tubes is mainly through liquid-cooled bridge tubes. The flow of coolant improves the heat dissipation efficiency. In order to improve the heat conduction efficiency of the power tube, a spring clip is generally used to clamp the power tube on the end face of the liquid-cooled bridge tube. Therefore, the arrangement of the spring clip needs to avoid the pin arrangement of the power tube. As the applicable power range of the power tube becomes higher and higher, the requirements for current and temperature detection are also getting higher and higher, so the insulation requirements and functional expandability requirements are also higher. Summary of the Invention

[0005] A first object of the present invention is to provide a high-reliability integrally encapsulated power module.

[0006] A second object of the present invention is to provide an electrical device having the above power module.

[0007] A third object of the present invention is to provide a vehicle having the power module.

[0008] In order to achieve the first purpose of the present invention, the present invention provides an integrated potted power module, including a liquid-cooled bridge tube, multiple power tubes and a potting shell, a liquid-cooling flow channel is arranged in the liquid-cooling bridge tube along the length direction, and the liquid-cooling bridge tube is respectively provided with liquid-cooling interfaces at both ends of the liquid-cooling flow channel based on the length direction. The packages of the multiple power tubes are thermally connected to the outer wall of the liquid-cooling bridge tube by heat conduction, the potting shell surrounds the liquid-cooling bridge tube and the outer periphery of the multiple power tubes, the potting shell is filled with potting glue, the potting glue is wrapped around the outer periphery of the packages of the multiple power tubes, and the liquid-cooling interface and the pins of the multiple power tubes are all located outside the potting shell.

[0009] It can be seen from the above scheme that through the heat conduction connection between the power tube and the liquid-cooled bridge tube, the waste heat on the power tube can be efficiently conducted to the liquid-cooled bridge tube for heat dissipation, and the potting shell surrounds the periphery of the liquid-cooled bridge tube and multiple power tubes, and the potting glue inside is wrapped around the periphery of the package of multiple power tubes. In addition to further improving the thermal conductivity efficiency, it can also achieve potting isolation to avoid interference from water vapor, thereby improving shock resistance, stability and reliability.

[0010] A further solution is that the liquid-cooled bridge tube has heat-conducting side surfaces on both sides in the width direction, and the packages of multiple power tubes are thermally connected to the heat-conducting side surfaces; the potting shell includes an inner baffle, an outer baffle and a bottom baffle, and the inner baffle, the outer baffle and the bottom baffle all extend along the length direction, the bottom baffle is located on the outside of the first end face of the liquid-cooled bridge tube based on the height direction, the bottom baffle is connected between the inner baffle and the outer baffle, the inner baffle and the outer baffle are respectively located on both sides in the width direction, and the inner baffle and the outer baffle are respectively connected to the outside of the heat-conducting side surfaces; the inner baffle, the outer baffle and the bottom baffle form a potting cavity, and the potting cavity is filled with potting glue.

[0011] As can be seen from the above, the inner baffle and the outer baffle are connected to the outside of the heat-conducting side, and the enclosed potting cavity is filled with potting glue, which facilitates the connection and positioning of the potting shell and the liquid-cooling bridge tube, and forms an effective relatively sealed potting cavity.

[0012] A further solution is that the liquid cooling interface is located on the first end face, the liquid cooling interface and the pins of the power tube are arranged in opposite directions along the height direction, the bottom baffle is located between the two liquid cooling interfaces, and the pins of the power tube are located outside the encapsulation cavity.

[0013] As can be seen from the above, through the enclosed arrangement of the inner baffle, the outer baffle and the bottom baffle, the arrangement of the above baffles does not affect the access arrangement of the liquid cooling interface, nor does it affect the welding arrangement of the pins. By using the liquid cooling interface and pins arranged in opposite directions, the electrically connected part is kept away from the liquid cooling and heat dissipation part, thereby improving safety.

[0014] A further solution is that the bottom baffle is respectively provided with bottom clamping parts on both edges in the width direction, and the inner baffle and the outer baffle are provided with side clamping parts on the edges in the height direction, and the bottom clamping parts and the side clamping parts are detachably engaged.

[0015] A further solution is that first positioning holes are respectively provided at both ends of the length direction of the heat-conducting side facing the outer baffle, and first positioning columns are respectively provided at both ends of the length direction of the outer baffle, and the first positioning columns are connected to the first positioning holes; second positioning holes are respectively provided at both ends of the length direction of the heat-conducting side facing the inner baffle, and second positioning columns are respectively provided at both ends of the length direction of the inner baffle, and the second positioning columns are connected to the second positioning holes.

[0016] As can be seen from the above, the relatively separated inner baffle, outer baffle and bottom baffle, the cooperation between the positioning column and the positioning hole, and the engagement between the bottom clamping part and the side clamping part facilitate the molding and assembly positioning of the glue-filled shell.

[0017] A further solution is to weld the package of the power tube to the outer wall of the liquid-cooled bridge tube.

[0018] As can be seen from the above, by soldering the connection, the heat conduction of the solder is utilized, thereby improving the heat conduction efficiency.

[0019] A further solution is that the power module also includes a thermistor circuit board, which is provided with multiple thermistors. The thermistor circuit board is located in the glue-potting shell and on the side of the power tube. The thermistor is used to detect the temperature of the power tube. The thermistor circuit board is provided with a signal port outside the glue-potting shell.

[0020] As can be seen from the above, by integrating a thermally sensitive circuit board in the potting shell, the temperature of the power tube can be accurately detected.

[0021] A further solution is that three phase output columns are provided along the width direction of the outer baffle, and the phase output columns are connected to the power tubes of the corresponding phase bridge arms.

[0022] As can be seen from the above, by arranging three phase output columns along the width direction, the output and connection of power are facilitated. Compared with the existing switching and lead-out through the circuit board, the phase output column can be directly led out without passing through the circuit board, thereby optimizing the circuit layout and avoiding interference in the structural layout, making the overall device layout more compact.

[0023] A further solution is that the power module includes three phase connecting pieces, which are located in the potting shell and wrapped by potting glue. The phase connecting pieces extend from the bottom baffle to the outer baffle. The power tube is provided with a first connecting electrode at one end close to the bottom baffle. The phase connecting piece is connected to the first connecting electrodes of the power tube located on both sides in the width direction, and the phase connecting piece is connected to the phase output column.

[0024] A further solution is that the phase connecting piece includes a width connecting piece and a height connecting piece. The width connecting piece extends along the width direction, and the height connecting piece extends along the height direction. The width connecting piece is connected to the first connecting electrode of the power tube located on both sides of the width direction, and the height connecting piece is located on the outside of the power tube based on the width direction. The height connecting piece is connected between the width connecting piece and the phase output column.

[0025] As can be seen from the above, the use of phase connecting pieces facilitates the connection arrangement of the power tube and the phase output column, and the bridge connection of the width connecting piece and the height connecting piece not only makes the welding connection more closed, but also enables the power to be output directly and more efficiently. By wrapping it with potting glue, the waste heat on the phase connecting piece can also be conducted through the potting glue to improve the heat dissipation efficiency.

[0026] A further solution is to provide heat-conducting putty between the width connecting piece and the liquid-cooling bridge tube.

[0027] A further solution is that the first connecting electrode is provided with a bent connecting portion at the thermal conductive paste, and the bent connecting portion is welded to the width connecting piece.

[0028] It can be seen from the above that, in addition to achieving the function of heat conduction, the thermal conductive paste can also play an insulating role to improve the operational stability.

[0029] A further solution is that the outer baffle is provided with a C-shaped groove and a longitudinal groove on the outer periphery of the phase output column. The longitudinal groove extends along the height direction and is located at the notch of the C-shaped groove. A magnetic core is provided in the C-shaped groove and a current sensor is provided in the longitudinal groove.

[0030] As can be seen from the above, the magnetic core and current sensor are integrated on the outer baffle, which facilitates the monitoring and feedback output of the output current.

[0031] In order to achieve the second purpose of the present invention, the present invention provides an electrical device, including the power module, circuit board and housing as described above, the power module and circuit board are arranged in the housing, and the pins of the power tube are connected to the circuit board.

[0032] In order to achieve the third object of the present invention, the present invention provides a vehicle comprising the power module according to the above solution.

[0033] As can be seen from the above scheme, the integrally potted power module is set in the casing of the electrical equipment. Compared with the prior art, the entire casing is potted. In this case, only the key waste heat generating components are potted, isolated and heat-conducted. This not only saves a lot of potting glue and helps control costs, but also facilitates welding, assembly and maintenance because the circuit board is exposed to the potting glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of an embodiment of an electrical device of the present invention.

[0035] Figure 2 This is a structural diagram of an embodiment of the electrical device of the present invention after the cover is opened.

[0036] Figure 3 It is a structural diagram of a circuit device in an embodiment of an electrical device of the present invention.

[0037] Figure 4 2 is a structural diagram of the circuit device in the embodiment of the electrical equipment of the present invention from another perspective.

[0038] Figure 5 It is a structural diagram of an embodiment of a power module of the present invention.

[0039] Figure 6 It is a structural diagram of the power module embodiment of the present invention from another perspective.

[0040] Figure 7 It is an exploded view of an embodiment of a power module of the present invention.

[0041] Figure 8 It is an exploded view of the power module embodiment of the present invention from another perspective.

[0042] Figure 9 This is a structural diagram of an embodiment of a power module of the present invention without the glue-filled housing.

[0043] Figure 10 4 is a cross-sectional view of an embodiment of an electric device according to the present invention at a phase output column.

[0044] Figure 11 yes Figure 10 Enlarged view of point A in the middle.

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0046] Electrical equipment and power module embodiments:

[0047] Reference Figures 1 to 11 The electrical equipment may include but is not limited to a motor controller, an on-board charger, an on-board power supply, an inverter or a transformer. This embodiment is described using a motor controller as an example.

[0048] The electrical equipment includes a shell 1 and a circuit device 2. The shell includes a base 11 and a cover 12. The base 11 encloses a device accommodating cavity 111. The circuit device 2 is arranged in the accommodating cavity 111. The cover 12 covers the outside of the accommodating cavity 111 and is connected to the base 11. The base 11 is respectively provided with a DC input port 113, a signal interface 114 and a three-phase output port 112 on both sides of the width direction Y. The base 11 is provided with two liquid cooling inlets 115 on the side wall in the length direction X. The base 11 is provided with a liquid cooling tank 116 at the bottom. The two liquid cooling inlets 115 are connected to the liquid cooling tank 116. The liquid cooling tank 116 is provided with two interfaces (not shown) in the accommodating cavity 111 of the base 11. The two interfaces are respectively connected to the liquid cooling interface 312, and then the cooling liquid circulates in the liquid cooling channel 311 in the liquid cooling bridge pipe 31.

[0049] The circuit device 2 includes a power module 3, a capacitor module 21, a circuit board 23, an input copper busbar 24 and a connecting bracket 22. The connection end of the input copper busbar 24 is located at the DC input port 113. The input copper busbar 24 is connected to the capacitor module 21 and the source or drain of multiple power tubes 34 through the bridge connecting the copper busbar. The connecting bracket 22 is connected between the power module 3 and the capacitor module 21. The circuit board 23 is arranged above the power module 3 and the capacitor module 21, and the liquid cooling interface 312 is arranged downward.

[0050] The power module 3 includes a liquid-cooled bridge tube 31, multiple power tubes 34, a glue-filled shell 32 and a thermal circuit board 35. A liquid-cooled flow channel 311 is provided in the liquid-cooled bridge tube 31 along the length direction X. The liquid-cooled bridge tube 31 is provided with liquid-cooling interfaces 312 at both ends of the liquid-cooling flow channel 311 based on the length direction X. The liquid-cooled bridge tube 31 has heat-conducting side surfaces 313 on both sides of the width direction Y. The liquid-cooled bridge tube 31 is provided with a first end face 314 and a second end face at both ends of the height direction Z. The two liquid-cooling interfaces 312 are located on the first end face 314. The liquid-cooled bridge tube 31 is provided with a clamping block 317 and a clamping column 316 at both ends of the length direction X. The clamping block 317 and the clamping column 316 are respectively engaged with the connecting bracket 22.

[0051] The packaging of multiple power tubes 34 is thermally connected to the outer wall of the liquid-cooled bridge tube 31. Specifically, the multiple power tubes 34 are arranged in two rows along the length direction X and constitute two power tube groups. The two upper power tube groups are respectively located on both sides of the liquid-cooled bridge tube 31 based on the width direction Y. The packaging of multiple power tubes 34 is thermally connected to the heat-conducting side surface 313, and the packaging of the power tubes 34 is welded to the outer wall of the liquid-cooled bridge tube 31.

[0052] The power tube 34 is provided with a first connecting electrode 341 at the first end in the height direction, and two second connecting electrodes 342 and a third connecting electrode 343 are provided at the second end in the height direction. The third connecting electrode 343 is the gate of the power tube and is arranged in a pin configuration, which is used for welding to the circuit board 23. The two second connecting electrodes 342 are respectively located on both sides of the third connecting electrode 343. The first connecting electrode 341 of one group of power tubes is the source and the second connecting electrode 342 is the drain, while the first connecting electrode 341 of the other group of power tubes is the drain and the second connecting electrode 342 is the source.

[0053] The glue-filling shell 32 surrounds the outer periphery of the liquid-cooling bridge tube 31 and multiple power tubes 34. Specifically, the glue-filling shell 32 includes an inner baffle 323, an outer baffle 33 and a bottom baffle 321. The inner baffle 323, the outer baffle 33 and the bottom baffle 321 all extend along the length direction X. The bottom baffle 321 is located on the outside of the first end face 314 based on the height direction Z. The bottom baffle 321 is connected between the inner baffle 323 and the outer baffle 33. The inner baffle 323 and the outer baffle 33 are respectively located on both sides of the width direction Y. The inner baffle 323 and the outer baffle 33 are respectively connected to the outside of the heat-conducting side 313.

[0054] The liquid cooling interface 312 is located on the first end surface 312 of the liquid cooling bridge tube 31 based on the height direction Z. The pins of the liquid cooling interface 312 and the third connecting electrode 343 of the power tube 34 are arranged in opposite directions along the height direction Z. The bottom baffle 321 is located between the two liquid cooling interfaces 312. The third connecting electrode 343 and the second connecting electrode 342 of the power tube 34 are located outside the encapsulation cavity.

[0055] The bottom baffle 321 is provided with bottom latches 322 on both edges in the width direction Y. The bottom baffle 321 is arranged in a raised position in the middle, with the flat plate 363 located within the raised portion of the bottom baffle 321. Side latches 325 are provided on the edge of the inner baffle 323 in the height direction Z, and side latches 331 are provided on the edge of the outer baffle 33 in the height direction Z. The bottom latches 322 are detachably engaged with the side latches 331 and 325. First positioning holes 3151 are provided at both ends of the heat-conducting side surface 313 facing the outer baffle 33 in the length direction X. First positioning posts 332 are provided at both ends of the outer baffle 33 in the length direction X. The first positioning posts 332 are connected using studs and are connected to the first positioning holes 3151. Second positioning holes 3152 are respectively provided at both ends of the heat-conducting side surface 313 facing the inner baffle 323 in the length direction X. Second positioning posts 324 are respectively provided at both ends of the inner baffle 323 in the length direction X. The second positioning posts 324 are connected to the second positioning holes 3152 .

[0056] The outer baffle 33 is provided with three phase output columns 333 along the width direction Y. The phase output columns 333 are connected to the power tubes 34 of the corresponding phase bridge arms. Each phase output column 333 is connected to a connecting piece 366 on the outer side of the outer baffle 33 . The power module 3 also includes three phase connecting pieces, which are located in the potting shell 32 and wrapped with potting glue. The phase connecting pieces extend from the bottom baffle 321 to the outer baffle 33. The phase connecting pieces include a width connecting piece 361 and a height connecting piece 362. The width connecting piece 361 extends along the width direction Y, and the height connecting piece 362 extends along the height direction Z. The flat portion 363 of the width connecting piece 361 is connected to the first connecting electrode 341 of the power tube 34 located on both sides of the width direction Y. A thermal conductive paste 318 is provided between the width connecting piece 361 and the liquid-cooled bridge tube 31. The first connecting electrode 341 is provided with a bent connection portion at the thermal conductive paste 318. The bent connection portion is bent in an L shape and is welded to the width connecting piece 361.

[0057] The height connecting piece 362 is located on the outside of the power tube 34 based on the width direction Y. The height connecting piece 362 is provided with a welding portion 365 at the first end in the height direction Z. The welding portion 365 is arranged in a planar manner. The width connecting piece 361 has multiple welding branches 364 at the end close to the height connecting piece 362. There is a gap between the multiple welding branches 364. The welding branches 364 are deflected toward the height connecting piece 362. The multiple welding branches 364 are respectively welded to the welding portion 365. The outer baffle 33 is provided with a positioning step 337 at the welding portion 365. The welding branch 364 and the welding portion 365 are located in the positioning step 337. The second end of the height connecting piece 362 in the height direction Z is connected to the phase output column 333, thereby realizing the connection between the phase connecting piece and the first connection electrode 341 of the power tube 34 located on both sides of the width direction Y, and the phase connecting piece is connected to the phase output column 333.

[0058] The outer baffle 33 is provided with a C-shaped groove 335 and a longitudinal groove 336 on the outer periphery of the phase output column 333. The longitudinal groove 336 extends along the height direction Z and is located at the notch of the C-shaped groove 335. A magnetic core 371 is provided in the C-shaped groove 335, and a current sensor 372 is provided in the longitudinal groove 336. The pins of the current sensor 372 extend along the height direction Z toward the circuit board 23, and the pins of the current sensor 372 are welded to the circuit board 23.

[0059] Multiple thermistors are provided on the thermistor circuit board 35. The thermistor circuit board 35 is located inside the glue-filled shell 32 and on the side of the power tube 34. The thermistor is used to detect the temperature of the power tube 34. The thermistor circuit board 35 is provided with a signal port 351 outside the glue-filled shell 32. The signal port 351 is connected to the circuit board 23.

[0060] The inner baffle 323, outer baffle 33, and bottom baffle 321 form a potting cavity. The potting cavity of the potting housing 32 is filled with potting compound, which wraps around the packages of the multiple power tubes 34, the thermally sensitive circuit board 35, the three phase connectors, the first end face 314, and the outer periphery of the two heat-conducting side faces 313. The liquid cooling interface 312 and the pins of the multiple power tubes 34 are all located outside the potting housing 32. In addition to conducting heat to the power tubes through the heat-conducting side faces, the first end face 314 on the bottom side also conducts heat to the phase connectors of the three-phase output, and the second end face on the top side also dissipates heat from the positive and negative busbars.

[0061] Vehicle Example:

[0062] The vehicle includes electrical equipment as described above, and the electrical equipment or vehicle has a power module as described above. The vehicle can be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0063] Of course, the above embodiments are only preferred embodiments of the present invention, and may have more variations in actual applications. Based on the overall concept of integrated potting, for example, the pin arrangement of the power tube and the arrangement of the phase output column can be connected through a circuit board, which can also achieve the purpose of the present invention. In addition to using three split components, the potting shell can also adopt a two-split or integrated arrangement, which can also form a package for the power tube. The above changes all fall within the scope of protection of the present invention.

[0064] As can be seen from the above, through the heat conduction connection between the power tube and the liquid-cooled bridge tube, the waste heat on the power tube can be efficiently conducted to the liquid-cooled bridge tube for heat dissipation, and the potting shell surrounds the periphery of the liquid-cooled bridge tube and multiple power tubes, and the potting glue inside is wrapped around the periphery of the package of multiple power tubes. In addition to further improving the thermal conductivity efficiency, it can also achieve potting isolation to avoid interference from water vapor, thereby improving shock resistance, stability and reliability.

Claims

1. An integrally potted power module, characterized in that: include: A liquid-cooling bridge tube, wherein a liquid-cooling flow channel is provided in the liquid-cooling bridge tube along the length direction, and the liquid-cooling bridge tube is provided with liquid-cooling interfaces at both ends of the liquid-cooling flow channel based on the length direction; A plurality of power tubes, wherein the packages of the plurality of power tubes are connected to the outer wall of the liquid-cooling bridge tube and are thermally connected to the outer wall of the liquid-cooling bridge tube; A potting shell, the potting shell surrounds the liquid-cooled bridge tube and the outer periphery of the plurality of power tubes, the potting shell is filled with potting glue, the potting glue is wrapped around the outer periphery of the package of the plurality of power tubes, the liquid cooling interface and the third connection electrode and the second connection electrode of the plurality of power tubes are all located outside the potting shell; The liquid-cooled bridge tube has heat-conducting side surfaces on both sides in the width direction, and the packages of the multiple power tubes are thermally connected to the heat-conducting side surfaces; The glue-filling shell includes an inner baffle, an outer baffle, and a bottom baffle, wherein the inner baffle, the outer baffle, and the bottom baffle all extend along the length direction, the bottom baffle is located outside the first end surface of the liquid-cooling bridge tube in the height direction, and the bottom baffle is connected between the inner baffle and the outer baffle. The inner baffle and the outer baffle are respectively located on both sides in the width direction, and the inner baffle and the outer baffle are respectively connected to the outside of the heat-conducting side surface; The inner baffle, the outer baffle and the bottom baffle form a potting cavity, and the potting cavity is filled with the potting glue; The outer baffle is provided with three phase output columns along the width direction, and the phase output columns are connected to the power tubes of the corresponding phase bridge arms; The power module includes three phase connecting pieces, which are located in the potting shell and wrapped by the potting glue. The phase connecting pieces extend from the bottom baffle to the outer baffle. The power tube is provided with a first connecting electrode at one end close to the bottom baffle. The phase connecting piece is connected to the first connecting electrodes of the power tube located on both sides of the width direction, and the phase connecting piece is connected to the phase output column.

2. The power module according to claim 1, wherein: The liquid cooling interface is located on the first end surface, the liquid cooling interface and the third connecting electrode of the power tube are arranged in opposite directions along the height direction, the bottom baffle is located between the two liquid cooling interfaces, and the third connecting electrode of the power tube is located outside the encapsulation cavity.

3. The power module according to claim 1, wherein: The bottom baffle is provided with bottom clamping parts at both edges in the width direction, and the inner baffle and the outer baffle are provided with side clamping parts at their edges in the height direction. The bottom clamping parts are detachably engaged with the side clamping parts.

4. The power module according to claim 3, wherein: First positioning holes are respectively provided at both ends of the heat-conducting side surface facing the outer baffle in the length direction, and first positioning posts are respectively provided at both ends of the outer baffle in the length direction, and the first positioning posts are connected to the first positioning holes; Second positioning holes are respectively provided at both ends of the length direction of the heat-conducting side surface facing the inner baffle. Second positioning posts are respectively provided at both ends of the length direction of the inner baffle. The second positioning posts are connected to the second positioning holes.

5. The power module according to claim 1, wherein: The package of the power tube is welded to the outer wall of the liquid-cooling bridge tube.

6. The power module according to claim 1, wherein: The power module also includes a thermistor circuit board, on which a plurality of thermistors are provided. The thermistor circuit board is located inside the glue-potting shell and on the side of the power tube. The thermistor is used to detect the temperature of the power tube. The thermistor circuit board is provided with a signal port outside the glue-potting shell.

7. The power module according to claim 1, wherein: The phase connecting piece includes a width connecting piece and a height connecting piece, the width connecting piece extends along the width direction, the height connecting piece extends along the height direction, the width connecting piece is connected to the first connecting electrode of the power tube located on both sides of the width direction, the height connecting piece is located on the outside of the power tube based on the width direction, and the height connecting piece is connected between the width connecting piece and the phase output column.

8. The power module according to claim 7, wherein: Thermal conductive paste is provided between the width connecting piece and the liquid cooling bridge tube.

9. The power module according to claim 8, wherein: The first connecting electrode is provided with a bent connecting portion at the thermal conductive paste, and the bent connecting portion is welded to the width connecting piece.

10. The power module according to claim 1, wherein: The outer baffle is provided with a C-shaped groove and a longitudinal groove on the outer periphery of the phase output column. The longitudinal groove extends along the height direction and is located at the notch of the C-shaped groove. A magnetic core is provided in the C-shaped groove, and a current sensor is provided in the longitudinal groove.

11. Electrical equipment, characterized in that It comprises the power module, circuit board and housing according to any one of claims 1 to 10, wherein the power module and the circuit board are arranged in the housing, and the pins of the power tube are connected to the circuit board.

12. A means of transport, characterized in that The method comprises the power module according to any one of claims 1 to 10.

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