An inverter power brick structure of an electric drive system
By introducing a heat dissipation water-cooled plate and EMC filter components into the inverter power brick structure, the problems of poor heat dissipation and insufficient electromagnetic compatibility are solved, achieving more efficient heat dissipation and electromagnetic compatibility, and improving the stability and reliability of the motor controller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI AUTO EDRIVE CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-06-05
AI Technical Summary
Existing inverter power brick structures suffer from poor heat dissipation and insufficient electromagnetic compatibility, affecting the operational reliability and stability of the motor controller.
The design employs a water-cooled plate combined with EMC filtering components and AC output components. Support capacitors, IGBT modules, and EMC filtering components are directly mounted on the water-cooled plate. A filtering topology with alternating distribution of safety capacitor banks and noise-suppressing magnetic rings is used, combined with an AC output component composed of three-phase copper busbars and magnetic rings. Current and temperature sensors are set up for monitoring.
It improves the heat dissipation and electromagnetic compatibility of the inverter power module, enhances the stability and reliability of the motor controller, reduces the occurrence of electrical corrosion of the motor bearings, and achieves level 5 EMC performance and dynamic temperature monitoring of the power brick structure.
Smart Images
Figure CN224329403U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor control systems, and in particular to an inverter power brick structure for an electric drive system. Background Technology
[0002] With increasing global attention to environmental protection and sustainable development, new energy vehicles, as an important alternative to traditional gasoline-powered vehicles, have experienced rapid growth in recent years. Among the core technologies of new energy vehicles, the motor controller plays a crucial role, as its performance directly affects the vehicle's power, economy, and reliability.
[0003] As an innovative form of motor controller, inverter power bricks are gradually becoming a focus of industry attention and are highly favored by OEMs due to their advantages such as high power density, high interface compatibility, simple structure, and low cost. Currently, the common practice in the industry is to mount the supporting capacitors, power modules, and drive circuit boards onto a heat-dissipating aluminum plate. However, precisely because of their simple structure and high concentration of power devices, operational reliability, electromagnetic compatibility, and heat dissipation of power devices are also technical challenges that inverter power brick assemblies must face.
[0004] Therefore, to address the problems existing in the current power modules, it is necessary to optimize the layout and structure of each component of the power module and provide an inverter power brick structure for an electric drive system with good heat dissipation and high electromagnetic compatibility. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, such as the stacked distribution of various components of the power module and the poor heat dissipation of the power module, and to provide an inverter power brick structure for an electric drive system.
[0006] The objective of this utility model can be achieved through the following technical solutions:
[0007] An inverter power brick structure for an electric drive system includes a supporting capacitor, a drive circuit board, an IGBT module, an EMC filter assembly, and a water-cooled plate. One side of the water-cooled plate has an adjacent water tank and a potting cavity, while the opposite side has a filter mounting channel. The EMC filter assembly is fixed within the mounting channel and connected to the input terminal of the supporting capacitor. The supporting capacitor is fixed within the potting cavity. The IGBT module is fixed within the water tank. The drive circuit board is electrically soldered to the end of the IGBT module furthest from the water tank. The output terminal of the supporting capacitor is connected to the IGBT module.
[0008] Preferably, the EMC filter assembly includes a filter bracket, a busbar, a filter board, multiple safety capacitor banks, and multiple noise-suppressing magnetic rings;
[0009] The filter bracket has a mounting groove on one side that mates with the safety capacitor bank and the noise suppression magnetic ring, and a slot on the opposite side that mates with the busbar. The busbar is fixed in the slot. The safety capacitor bank and the noise suppression magnetic ring are alternately distributed. The filter board is electrically connected to the safety capacitor bank. The busbar passes through the noise suppression magnetic ring. The output end of the busbar is connected to the input end of the supporting capacitor.
[0010] Preferably, the EMC filtering component includes a first safety capacitor bank, a first noise suppression magnetic ring, a second safety capacitor bank, a second noise suppression magnetic ring, and a third safety capacitor bank.
[0011] The first noise-suppressing magnetic ring and the second noise-suppressing magnetic ring are both sleeved on the busbar. The first safety capacitor group is located on the side of the first noise-suppressing magnetic ring away from the second noise-suppressing magnetic ring. The second safety capacitor group is located between the first noise-suppressing magnetic ring and the second noise-suppressing magnetic ring. The third safety capacitor group is located on the side of the second noise-suppressing magnetic ring away from the first noise-suppressing magnetic ring.
[0012] Preferably, the safety capacitor bank includes multiple X capacitors and Y capacitors, which are electrically soldered onto the filter board.
[0013] Preferably, the heat dissipation water cooling plate is further provided with an AC output component, which includes a plastic-coated bracket, a three-phase copper busbar, and a three-phase magnetic ring;
[0014] The three-phase copper busbar is fixed inside a plastic-coated bracket. One end of the plastic-coated bracket has a racetrack-shaped groove. The three-phase magnetic ring is fixed inside the groove. The three-phase copper busbar passes through the three-phase magnetic ring and is connected to the output terminal of the IGBT module.
[0015] Preferably, an AC current sensor is provided between the IGBT module and the three-phase copper busbar, and the output terminal of the IGBT module is connected to the three-phase copper busbar through the AC current sensor.
[0016] Preferably, a DC current sensor is provided on the input copper busbar of the supporting capacitor.
[0017] Preferably, the water-cooling plate is provided with an inlet and an outlet, the inlet and outlet being located on the side of the water-cooling plate away from the water-cooling tank, and the inlet and outlet being distributed at both ends of the water-cooling tank.
[0018] Preferably, the heat dissipation water tank is provided with a first temperature detection hole and a second temperature detection hole on both sides, with the first temperature detection hole facing the water inlet and the second temperature detection hole facing the water outlet.
[0019] Preferably, a connecting copper busbar is provided between the supporting capacitor and the IGBT module. The connecting copper busbar has an arch-shaped bend, and stress-relieving grooves are provided on both sides of the arch-shaped bend. The supporting capacitor and the IGBT module are respectively welded to the two ends of the connecting copper busbar.
[0020] Compared with the prior art, the present invention has the following advantages:
[0021] (1) This solution improves the heat dissipation of the inverter power module by pre-setting the corresponding mounting structure on the heat dissipation water-cooling plate, thereby directly mounting and fixing most of the components on the heat dissipation water-cooling plate. The core of the supporting capacitor is fixed in the potting cavity, and the heat dissipation water-cooling plate is directly and physically integrated. The supporting capacitors and IGBT modules are arranged side by side, and the EMC filter components are located on the back. The overall structure of the power module is square brick-shaped, with a regular structure, which is convenient for installation and assembly, and the heat dissipation of each component is good.
[0022] (2) The EMC filter component of this solution adopts a multi-level filter topology structure with alternating distribution of safety capacitor groups and noise suppression magnetic rings. Each level of safety capacitor group, noise suppression magnetic ring and bus are integrated in the filter bracket. The filter board above the filter bracket electrically connects each safety capacitor group and bus. This filter component has good noise reduction and filtering performance and can achieve EMC performance of level 5 for power brick structure.
[0023] (3) In this scheme, the AC output component is composed of a plastic-coated bracket and a three-phase magnetic ring. The three-phase copper busbar embedded in the plastic-coated bracket passes through the three-phase magnetic ring. This AC output component can effectively suppress the generation of motor shaft current and reduce the occurrence of bearing electro-corrosion.
[0024] (4) This solution installs current sensors at both the DC and AC ends of the power module, and temperature sensors at the inlet and outlet of the cooling water plate. The cooling water plate is an aluminum metal plate structure, with circular temperature detection holes on both sides to dynamically detect the inlet and outlet coolant temperatures in accordance with the heat dissipation requirements of the power devices. This dual-path monitoring of the inverter power module's electrical performance and thermal balance improves the stability and reliability of the inverter system, resulting in higher safety performance.
[0025] (5) In this solution, the supporting capacitor and the IGBT module are connected by a copper busbar with an arched buffer structure. The side of the copper busbar adopts an upward convex arch bridge structure. The two sides of the arch structure are provided with semi-circular stress relief grooves, which can effectively avoid fatigue damage caused by mechanical vibration after the copper busbar is soldered, thereby improving the stability and reliability of the connection between the supporting capacitor and the IGBT module. Attached Figure Description
[0026] Figure 1An exploded structural diagram of the inverter power brick structure provided by this utility model;
[0027] Figure 2 A schematic diagram of the inverter power brick structure provided by this utility model;
[0028] Figure 3 An exploded view of the AC output component provided by this utility model;
[0029] Figure 4 A top view of the heat dissipation water-cooled plate provided by this utility model;
[0030] Figure 5 A bottom view of the heat dissipation water-cooled plate provided by this utility model;
[0031] Figure 6 This is a schematic diagram of the structure of the adapter copper busbar provided by this utility model;
[0032] Figure 7 An exploded view of the EMC filter component provided by this utility model;
[0033] In the diagram: 1. Temperature sensor; 2. Driver circuit board; 3. IGBT module; 4. EMC filter assembly; 5. Water-cooled heat sink; 6. AC output assembly; 7. AC current sensor; 8. DC current sensor; 9. Adapter copper busbar; 41. Filter bracket; 42. Busbar; 43. Filter board; 44. First safety capacitor bank; 45. First noise suppression magnetic ring; 46. Second safety capacitor bank; 47. Second noise suppression magnetic ring; 48. Third safety capacitor bank; 51. Cooling water tank; 52. Encapsulation cavity; 53. Filter installation channel; 54. Inlet; 55. Outlet; 56. First temperature detection hole; 57. Second temperature detection hole; 61. Plastic-coated bracket; 62. Three-phase copper busbar; 63. Three-phase magnetic ring; 91. Arch-shaped bend; 92. Stress-relieving groove. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0037] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0038] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0039] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0040] Example 1
[0041] like Figure 1 and 2As shown, this embodiment provides an inverter power brick structure for an electric drive system, including a supporting capacitor, a drive circuit board 2, an IGBT module 3, an EMC filter assembly 4, and a heat dissipation water-cooled plate 5. One side of the heat dissipation water-cooled plate 5 is provided with an adjacent heat dissipation water tank 51 and a potting cavity 52, and the opposite side is provided with a filter mounting channel 53. The EMC filter assembly 4 is fixed in the filter mounting channel 53 and connected to the input end of the supporting capacitor. The supporting capacitor is fixed in the potting cavity 52. The IGBT module 3 is fixed in the heat dissipation water tank 51. The drive circuit board 2 is electrically soldered to the end of the IGBT module 3 away from the heat dissipation water tank 51. The output end of the supporting capacitor is connected to the IGBT module 3.
[0042] By pre-setting corresponding mounting structures on the water-cooled heat sink 5, most components of the power module are directly mounted and fixed on the water-cooled heat sink 5, effectively improving the heat dissipation effect of the inverter power module. The core of the supporting capacitor is fixed in the potting cavity 52, and the water-cooled heat sink is directly and physically integrated. The supporting capacitors and IGBT modules 3 are arranged side by side, and the EMC filter component 4 is located on the back. This makes the overall structure of the power module present a square brick shape, with a regular structure, which is convenient for installation and assembly, and the heat dissipation effect of each component is good.
[0043] Preferred implementation methods, such as Figure 7 As shown, the EMC filter assembly 4 includes a filter bracket 41, a busbar 42, a filter board 43, multiple safety capacitor banks, and multiple noise-suppressing magnetic rings.
[0044] The filter bracket 41 has a mounting groove on one side that mates with the safety capacitor bank and the noise suppression magnetic ring, and a slot on the opposite side that mates with the busbar 42. The busbar 42 is fixed in the slot. The safety capacitor bank and the noise suppression magnetic ring are alternately distributed. The filter board 43 is electrically connected to the safety capacitor bank. The busbar 42 passes through the noise suppression magnetic ring. The output end of the busbar 42 is connected to the input end of the supporting capacitor.
[0045] Furthermore, the EMC filter component 4 includes a first safety capacitor group 44, a first noise suppression magnetic ring 45, a second safety capacitor group 46, a second noise suppression magnetic ring 47, and a third safety capacitor group 48.
[0046] The first noise suppression magnetic ring 45 and the second noise suppression magnetic ring 47 are both sleeved on the busbar 42. The first safety capacitor group 44 is located on the side of the first noise suppression magnetic ring 45 away from the second noise suppression magnetic ring 47. The second safety capacitor group 46 is located between the first noise suppression magnetic ring 45 and the second noise suppression magnetic ring 47. The third safety capacitor group 48 is located on the side of the second noise suppression magnetic ring 47 away from the first noise suppression magnetic ring 45.
[0047] Specifically, the safety capacitor bank includes multiple X capacitors and Y capacitors, which are electrically soldered onto the filter board 43. This filter assembly has good noise reduction and filtering performance, achieving EMC performance of level 5 for power brick structures.
[0048] Preferred implementation methods, such as Figure 3 As shown, the heat dissipation water cooling plate 5 is also provided with an AC output component 6, which includes a plastic-coated bracket 61, a three-phase copper busbar 62 and a three-phase magnetic ring 63.
[0049] The three-phase copper busbar 62 is fixed inside the plastic-coated bracket 61. One end of the plastic-coated bracket 61 has a racetrack-shaped groove, and the three-phase magnetic ring 63 is fixed inside the groove. The three-phase copper busbar 62 passes through the three-phase magnetic ring 63 and connects to the output terminal of the IGBT module 3. The racetrack-shaped groove around the three-phase copper busbar 62 is used to pot and fix the three-phase magnetic ring 63. The three-phase copper busbar 62 passes through the three-phase magnetic ring 63. This can effectively suppress the generation of motor shaft current and reduce the occurrence of bearing electro-corrosion.
[0050] In this embodiment, an AC current sensor 7 is provided between the IGBT module 3 and the three-phase copper busbar 62. The output terminal of the IGBT module 3 is connected to the three-phase copper busbar 62 through the AC current sensor 7. A DC current sensor 8 is provided on the input copper busbar supporting the capacitor.
[0051] like Figure 4 and Figure 5 As shown, the heat dissipation water cooling plate 5 is provided with an inlet 54 and an outlet 55. The inlet 54 and the outlet 55 are located on the side of the heat dissipation water cooling plate 5 away from the heat dissipation water tank 51. The inlet 54 and the outlet 53 are distributed at both ends of the heat dissipation water tank 51.
[0052] Furthermore, the heat dissipation tank 51 is provided with a first temperature detection hole 56 and a second temperature detection hole 57 on both sides. The first temperature detection hole 56 is directly opposite the water inlet 54, and the second temperature detection hole 57 is directly opposite the water outlet 55. Temperature sensors 1 are respectively provided in the first temperature detection hole 56 and the second temperature detection hole 57, and the temperature sensors 1 are electrically connected to the drive circuit board 2.
[0053] Specifically, the cooling water plate 5 is a rectangular aluminum block structure. A modular water tank is located in the middle of the upper surface of the cooling water plate for heat dissipation of the IGBT module 3. Circular temperature detection holes are located at both ends of the cooling water tank 51, with the back of the detection holes facing the inlet and outlet. A capacitor potting cover is located on the side of the cooling water tank 51, supporting the core of the capacitor 1 to be directly placed in the potting cavity 52 below the potting cover, and cured with epoxy resin to achieve physical integration of the capacitor and the cooling water plate. The back of the cooling water plate has an inlet and an outlet, which are connected to the modular water tank on the front of the cooling water plate. During operation, coolant flows into the modular water tank from the inlet, rinsing the pins at the bottom of the IGBT module 3 to achieve heat exchange, and then flows out of the cooling water plate from the outlet. This dual-path monitoring of the electrical performance and thermal balance of the inverter power brick components improves the stability and reliability of the inverter system, resulting in higher safety performance.
[0054] Preferred implementation methods, such as Figure 7 As shown, a connecting copper busbar 9 is provided between the supporting capacitor and the IGBT module 3. The connecting copper busbar 9 has an arch-shaped bend 91, and stress-relieving grooves 92 are provided on both sides of the arch-shaped bend 91. The supporting capacitor and the IGBT module 3 are welded to the two ends of the connecting copper busbar 9, respectively.
[0055] In conjunction with the above preferred embodiments, such as Figures 1 to 7 As shown, this embodiment provides the specific fixing and installation process for each component in the inverter power brick structure:
[0056] First, the capacitor is potted and supported. The core of the supporting capacitor is placed on the capacitor potting surface of the heat dissipation water cooling plate 5, and the core and the heat dissipation water cooling plate are cured into an integral structure by epoxy.
[0057] Next, assemble the EMC filter assembly 3. Pass the busbar 42 through the first noise suppression magnetic ring 45 and the second noise suppression magnetic ring 47, and install the busbar 42, the first noise suppression magnetic ring 45, and the second noise suppression magnetic ring 47 into the filter bracket 41 as a whole, and fix them with epoxy potting compound. Then, place the first safety capacitor group 44, the second safety capacitor group 46, and the third safety capacitor group 48 into the corresponding pre-set slots on the upper end face of the filter bracket, and fix them with silicone. Finally, fix the filter board 43 onto the filter bracket, and electrically connect the leads of the safety capacitors and the leads of the busbar 42 to the filter board 43 by soldering.
[0058] Finally, assemble the inverter power brick assembly. Install the IGBT module 3 onto the cooling water tank 51 of the water-cooling plate 5, and connect it to the output copper busbar of the supporting capacitor via laser welding using the adapter copper busbar 9 to achieve electrical connection. Fix the DC current sensor 8 to the capacitor input terminal, and then transmit the AC current sensor 7 through the output terminal of the IGBT module 3 to electrically connect the three-phase output assembly to the output terminal of the IGBT module 3. Secure the three-phase output assembly to the water-cooling plate with bolts. Next, install the assembled EMC filter assembly 4 into the filter mounting channel on the back of the water-cooling plate, and electrically connect the busbar of the EMC filter assembly 4 to the capacitor input terminal of the water-cooling plate. Then, pre-apply silicone to the water temperature detection hole of the water-cooling plate, solder the water temperature sensor to the drive circuit board 2, and then install the drive circuit board 2 above the IGBT module 3, ensuring the water temperature sensor falls into the water temperature detection hole. Finally, connect the pins of the drive circuit board 2 and the IGBT module 3 by soldering.
[0059] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. An inverter power brick structure for an electric drive system, comprising a supporting capacitor, a drive circuit board (2), an IGBT module (3), an EMC filter assembly (4), and a heat dissipation water-cooling plate (5), characterized in that, The heat dissipation water cooling plate (5) has an adjacent heat dissipation water tank (51) and a potting cavity (52) on one side, and a filter installation channel (53) on the opposite side; the EMC filter component (4) is fixed in the filter installation channel (53) and connected to the input end of the support capacitor; the support capacitor is fixed in the potting cavity (52); the IGBT module (3) is fixed in the heat dissipation water tank (51); the drive circuit board (2) is electrically soldered to the end of the IGBT module (3) away from the heat dissipation water tank (51); and the output end of the support capacitor is connected to the IGBT module (3).
2. The inverter power brick structure of an electric drive system according to claim 1, characterized in that, The EMC filter assembly (4) includes a filter bracket (41), a busbar (42), a filter board (43), multiple safety capacitor banks, and multiple noise-suppressing magnetic rings; The filter bracket (41) has a mounting groove on one side that mates with the safety capacitor bank and the noise suppression magnetic ring, and a slot on the opposite side that mates with the busbar (42). The busbar (42) is fixed in the slot. The safety capacitor bank and the noise suppression magnetic ring are alternately distributed. The filter plate (43) is electrically connected to the safety capacitor bank. The busbar (42) passes through the noise suppression magnetic ring. The output end of the busbar (42) is connected to the input end of the supporting capacitor.
3. The inverter power brick structure of an electric drive system according to claim 2, characterized in that, The EMC filter assembly (4) includes a first safety capacitor group (44), a first noise suppression magnetic ring (45), a second safety capacitor group (46), a second noise suppression magnetic ring (47), and a third safety capacitor group (48). The first noise suppression magnetic ring (45) and the second noise suppression magnetic ring (47) are both sleeved on the busbar (42). The first safety capacitor group (44) is located on the side of the first noise suppression magnetic ring (45) away from the second noise suppression magnetic ring (47). The second safety capacitor group (46) is located between the first noise suppression magnetic ring (45) and the second noise suppression magnetic ring (47). The third safety capacitor group (48) is located on the side of the second noise suppression magnetic ring (47) away from the first noise suppression magnetic ring (45).
4. The inverter power brick structure of an electric drive system according to claim 2, characterized in that, The safety capacitor bank includes multiple X capacitors and Y capacitors, which are electrically soldered onto the filter board (43).
5. The inverter power brick structure of an electric drive system according to claim 1, characterized in that, The heat dissipation water cooling plate (5) is also provided with an AC output component (6), which includes a plastic-coated bracket (61), a three-phase copper busbar (62) and a three-phase magnetic ring (63); The three-phase copper busbar (62) is fixed inside the plastic-coated bracket (61). One end of the plastic-coated bracket (61) is provided with a racetrack-shaped groove. The three-phase magnetic ring (63) is fixed inside the groove. The three-phase copper busbar (62) passes through the three-phase magnetic ring (63) and is connected to the output end of the IGBT module (3).
6. The inverter power brick structure of an electric drive system according to claim 5, characterized in that, An AC current sensor (7) is provided between the IGBT module (3) and the three-phase copper busbar (62), and the output terminal of the IGBT module (3) is connected to the three-phase copper busbar (62) through the AC current sensor (7).
7. The inverter power brick structure of an electric drive system according to claim 1, characterized in that, A DC current sensor (8) is provided on the input copper busbar of the supporting capacitor.
8. The inverter power brick structure of an electric drive system according to claim 1, characterized in that, The heat dissipation water cooling plate (5) is provided with an inlet (54) and an outlet (55). The inlet (54) and outlet (55) are located on the side of the heat dissipation water cooling plate (5) away from the heat dissipation water tank (51). The inlet (54) and outlet (55) are distributed at both ends of the heat dissipation water tank (51).
9. The inverter power brick structure of an electric drive system according to claim 8, characterized in that, The heat dissipation tank (51) has a first temperature detection hole (56) and a second temperature detection hole (57) on both sides. The first temperature detection hole (56) is directly opposite the water inlet (54), and the second temperature detection hole (57) is directly opposite the water outlet (55). Temperature sensors (1) are respectively installed in the first temperature detection hole (56) and the second temperature detection hole (57). The temperature sensors (1) are electrically connected to the drive circuit board (2).
10. The inverter power brick structure of an electric drive system according to claim 1, characterized in that, A connecting copper busbar (9) is provided between the supporting capacitor and the IGBT module (3). The connecting copper busbar (9) has an arch-shaped bend (91). Stress-relieving grooves (92) are provided on both sides of the arch-shaped bend (91). The supporting capacitor and the IGBT module (3) are welded to the two ends of the connecting copper busbar (9).