CN211791314U

CN211791314U - Inverter assembly and electric automobile

Info

Publication number: CN211791314U
Application number: CN202020444623.9U
Authority: CN
Inventors: 刘金锋; 王斯博; 赵慧超; 徐德才; 刘志强; 李敏; 高一
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-10-27
Anticipated expiration: 2030-03-31

Abstract

The utility model relates to the field of electric automobiles, and discloses an inverter assembly and an electric automobile, wherein the inverter assembly comprises a main body box, two cavities are formed in the main body box through a partition plate, the inverter assembly also comprises two power modules which are arranged in parallel, and one power module is arranged in each cavity; and the cooling assembly is arranged between the two power modules and is symmetrically arranged about a plane vertical to the thickness direction of the partition plate, and is used for synchronously cooling the two power modules. The utility model discloses locate cooling module between two power modules and about the plane symmetry setting of perpendicular to baffle thickness direction for carry out the synchronous cooling to two power modules, make two power modules's cooling effect similar, the cooling effect is better moreover.

Description

Inverter assembly and electric automobile

Technical Field

The utility model relates to an electric automobile field especially relates to an inverter assembly and electric automobile.

Background

In a motor driving system, an inverter is used for controlling and regulating the rotating speed of a driving motor, and the main functions of the inverter comprise the following steps:

first, as an energy transmission device between the power battery and the driving motor, it has an inverter function, i.e., a DC-AC conversion function, and for example, it can convert a high-voltage direct current input from the power battery into a three-phase high-voltage alternating current to be transmitted to the driving motor;

and secondly, the control signal interface circuit and the driving motor control circuit are used for receiving signals sent by the vehicle controller and signals of motor temperature, speed, power and the like, making corresponding feedback, and feeding the signals back to the vehicle controller and the driving motor, so that the control effect of the driving motor is achieved.

With the increasing demand for high-power inverters and the increasing demand for inverters, the output parameters of a single power module often cannot meet the demand, and the power level of the inverter is generally improved by a method of forming a power module with a higher current density by combining a plurality of power modules in parallel. The method can provide required output parameters and has the advantages of flexible layout, high cost performance and the like.

However, heat is generated during the operation of the power module, and the power module generally needs to be cooled to ensure the normal operation of the power module. However, the existing cooling mode is mainly to cool the power modules in series, and the difference of the cooling effect of a plurality of power modules is large; a few parallel cooling schemes adopt the same-side arrangement form, so that the cooling structure occupies a large space and has a relatively complex structure.

Therefore, it is desirable to provide an inverter assembly to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inverter assembly and electric automobile can realize that a plurality of power modules carry out the cooling in step when realizing compactification design, big output.

To achieve the purpose, the utility model adopts the following technical proposal:

an inverter assembly, includes the main part case, inside two cavitys of forming through the baffle of main part case still includes:

the power modules are arranged in parallel, and one power module is arranged in each cavity;

and the cooling assembly is arranged between the two power modules, is symmetrically arranged about a plane perpendicular to the thickness direction of the partition plate, and is used for synchronously cooling the two power modules.

As a preferred technical solution of the above inverter assembly, the cooling assembly includes two heat dissipation water channels that are arranged in parallel and correspond to the power modules one to one, and the two heat dissipation water channels are symmetrically arranged with respect to a plane perpendicular to the thickness direction of the partition plate and both flow through with the cooling liquid.

As a preferred technical solution of the above inverter assembly, the heat dissipation water channels are disposed on the corresponding power modules, or both of the heat dissipation water channels are disposed inside the partition plate and distributed along the thickness direction of the partition plate.

As a preferred technical solution of the above inverter assembly, the cooling module further includes a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are both symmetrically disposed with respect to the partition plate;

the downstream end of the water inlet channel is provided with two first cooling water ports which are respectively communicated with inlets of the two heat dissipation water channels; and two second cooling water openings are formed in the upstream end of the water outlet channel and are respectively communicated with outlets of the two heat dissipation water channels.

As a preferable mode of the inverter assembly, the cooling unit includes a heat radiation water passage formed inside the partition plate, and the heat radiation water passage is symmetrically arranged with respect to a plane perpendicular to a thickness direction of the partition plate.

As a preferable aspect of the inverter assembly described above, the partition is made of an electromagnetic shielding material, and the inverter assembly further includes:

the control board is communicated with the corresponding power module through the drive board;

the power module comprises a main box inner wall, a shielding plate, a power module and a control board, wherein the shielding plate comprises a shielding part which is parallel to the partition plate and is connected with the connecting part of the main box inner wall, one of the power module is arranged between the shielding part and the partition plate, and the control board is arranged on one side of the partition plate, which is back to the shielding part.

As a preferred technical solution of the inverter assembly, the inverter assembly further comprises a high-voltage direct current connector, a direct current bus assembly and a direct current bus capacitor assembly which are electrically connected in sequence, wherein the direct current bus capacitor assembly is electrically connected with the two power modules at the same time;

the power module is characterized by also comprising alternating current busbar assemblies which correspond to the power modules one by one and are electrically connected with each other, wherein the same-phase alternating current busbar in the two alternating current busbar assemblies is electrically connected with one output terminal;

the direct current busbar assembly, the direct current busbar capacitor assembly and the two alternating current busbar assemblies are symmetrically arranged on a plane perpendicular to the thickness direction of the partition plate.

As a preferable technical solution of the inverter assembly, each of the output terminals is integrally provided with the same-phase ac busbar in one of the ac busbar assemblies.

As a preferable technical solution of the above inverter assembly, the inverter assembly further includes an upper cover for sealing the cavity provided with the control board, and a lower cover for sealing the cavity not provided with the control board.

The utility model also provides an electric automobile, include as above arbitrary the inverter assembly.

The utility model has the advantages that: the utility model discloses locate the cooling module between two power modules and about the plane symmetry setting perpendicular to baffle thickness direction for carry out the synchronous cooling to two power modules, make the cooling effect of two power modules similar, and the cooling effect is better, has improved the compactness of inverter assembly simultaneously; and high-power output can be realized by arranging the two power modules in parallel.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an inverter assembly provided in an embodiment of the present invention;

fig. 2 is an exploded view of an inverter assembly provided by an embodiment of the present invention;

fig. 3 is a schematic partial structure diagram of an inverter assembly provided in an embodiment of the present invention;

fig. 4 is a top view of a partial structure of an inverter assembly provided in an embodiment of the present invention;

fig. 5 is a side view of a partial structure of an inverter assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a main body box provided by an embodiment of the present invention;

fig. 7 is a schematic diagram of a filter circuit provided by an embodiment of the present invention;

fig. 8 is a schematic diagram of another filter circuit provided by an embodiment of the present invention;

fig. 9 is a schematic diagram of a cooling assembly according to an embodiment of the present invention.

In the figure:

11. a main body case; 111. a cooling water inlet; 112. a cooling water outlet; 113. a high-voltage connector mounting port; 114. a low-voltage connector mounting port; 115. a respirator mounting port; 116. a ground point; 12. a partition plate; 13. an upper cover; 14. a lower cover; 141. mounting a column;

2. a high voltage direct current connector;

3. a direct current busbar assembly; 30. a direct current bus bar wiring terminal; 31. a filter circuit; 311. a first Y capacitor bank; 312. a second Y capacitor bank; 313. a third Y capacitor bank; 314. an X capacitor; 315. a differential mode magnetic ring group I; 316. a differential mode magnetic ring group II; 317. a ground terminal;

4. a DC bus capacitor; 5. a power module;

6. an alternating current busbar assembly; 61. an alternating current bus bar; 62. an output terminal;

7. a cooling assembly; 71. a water inlet channel; 72. a water outlet channel; 73. a heat dissipation water channel; 731. a first cooling water port; 732. a second cooling water port; 74. a water inlet pipe; 75. a water outlet pipe;

80. a control panel; 81. a low voltage connector; 82. a respirator; 83. a current sensor; 841. a shielding part; 842. a connecting portion; 85. a drive plate.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

As shown in fig. 1 to 6, the present embodiment provides an inverter assembly, which includes a main body box 11, two power modules 5 arranged in parallel, a control board 80, and two driving boards 85, wherein the power modules 5 and the driving boards 85 are arranged in a one-to-one correspondence, and the control board 80 communicates with the corresponding power modules 5 through the driving boards 85. The structural design that two power modules 5 are connected in parallel is adopted, the current equalizing effect is ensured, and the power output and current output capability of the inverter are improved.

Two cavities are formed inside the main body case 11 by a partition plate 12 made of an electromagnetic shielding material, and a power module 5 and a drive plate 85 corresponding to the power module 5 are disposed in each cavity. The two power modules 5 are electromagnetically isolated by the partition plate 12, so that the anti-electromagnetic interference capability of the power modules 5 is improved.

One of the cavities is provided with a shielding plate connected to the inner wall of the main body case 11. The shielding plate and the control plate 80 are arranged in the same cavity, and the control plate 80 and the power module 5 which is arranged in the same cavity are respectively arranged at two sides of the shielding plate. The power module 5 and the control board 80 in the same cavity are electromagnetically isolated by the shielding board, so that the anti-interference capability of the power module 5 is further improved.

In this embodiment, the shielding plate includes a shielding portion 841 connected in parallel to the partition plate 12, and a connecting portion 842 connected to the inner wall of the main body case 11; one of the power modules 5 is disposed between the shielding portion 841 and the partition plate 12, and the control board 80 is disposed on a side of the shielding portion 841 opposite to the partition plate 12. With the above-described structure of the shield plate, the capability of resisting electromagnetic interference between the power module 5 and the control board 80 is further improved.

Specifically, the grounding point 116 is arranged on the main body box 11, the supporting point is arranged on the inner wall of the main body box 11, the connecting portion 842 is fixed on the supporting point through a crimping nut, and the control board 80 is connected to the shielding board through a bolt, so that the control board 80 is supported by the shielding board while the electromagnetic shielding is realized.

Further, the inverter assembly further comprises a high-voltage direct current connector 2, a direct current busbar component 3, a direct current busbar capacitor component and an alternating current busbar component 6, wherein the high-voltage direct current connector, the direct current busbar component and the direct current busbar capacitor component are electrically connected in sequence, and the alternating current busbar component 6 corresponds to the power modules 5 one to one and is electrically connected with the power modules. The main body box 11 is provided with a high-voltage connector mounting port 113 for mounting the high-voltage direct-current connector 2, the high-voltage direct-current connector 2 is used for connecting an external battery junction box and is a power supply input port for inputting external direct-current high voltage, the direct-current busbar assembly 3 and the direct-current busbar capacitor assembly are both arranged in the main body box 11, and the alternating-current busbar assembly 6 and the corresponding power module 5 are arranged in the same cavity; the direct current bus capacitor assembly is electrically connected with the two power modules 5 at the same time, and an output terminal 62 extends out of the in-phase alternating current bus 61 of the two alternating current bus assemblies 6 after the in-phase alternating current bus is electrically connected.

The direct-current busbar assembly 3, the two power modules 5, the two alternating-current busbar assemblies 6 and the direct-current busbar capacitor assembly are symmetrically arranged on a plane perpendicular to the thickness direction of the partition plate 12.

Specifically, as shown in fig. 1 to 3, each ac busbar assembly 6 includes three ac busbars representing different phases, and two ac busbar assemblies 6 are disposed in different cavities. Each alternating current busbar in one alternating current busbar assembly 6 is connected to the output end of the corresponding power module 5, and the same-phase alternating current busbars in the two alternating current busbar assemblies 6 are electrically connected and symmetrically arranged about a plane perpendicular to the thickness direction of the partition plate 12.

In this embodiment, the dc busbar assembly 3, the dc busbar capacitor assembly, the two ac busbar assemblies 6, and the two power modules 5 are all symmetrically disposed about a plane perpendicular to the thickness direction of the partition 12. By adopting the symmetrical arrangement, the static current sharing and dynamic current sharing effects of the double-power modules 5 connected in parallel are structurally ensured.

The direct-current busbar assembly 3 comprises a conductive bar, a filter circuit 31 and direct-current busbar wiring terminals 30 which are in one-to-one correspondence with the power modules 5 and are arranged in parallel, one end of the conductive bar is electrically connected with the high-voltage direct-current connector 2, the other end of the conductive bar is electrically connected with the two direct-current busbar wiring terminals 30 through the filter circuit 31, and each direct-current busbar wiring terminal 30 is electrically connected with the corresponding power module 5 through a direct-current busbar capacitor 4. By arranging the filter circuit 31 for electromagnetic interference processing, the electromagnetic interference resistance is improved.

In this embodiment, the dc bus capacitor assembly includes two dc bus capacitors 4, and the dc bus capacitors 4 are disposed in one-to-one correspondence with the power modules 5 and electrically connected to each other. The direct current bus capacitors 4 and the corresponding power modules 5 are arranged in the same cavity, and the two direct current bus capacitors 4 are symmetrically arranged about a plane perpendicular to the thickness direction of the partition plate 12.

Each direct current bus capacitor 4 is provided with a pair of capacitance input ends and N pairs of capacitance output ends, the pair of capacitance input ends of each direct current bus capacitor 4 are respectively electrically connected with the positive output end and the negative output end of the direct current bus assembly 3, and the power module 5 is provided with power input ends which are in one-to-one correspondence and are electrically connected with the capacitance output ends of the corresponding direct current bus capacitors 4.

In other embodiments, the dc bus capacitor assembly may also be an integrated dc bus capacitor, and the dc bus capacitor assembly has a pair of capacitor input ends, N pairs of first capacitor output ends, and N pairs of second capacitor output ends, where the pair of capacitor input ends are respectively electrically connected to the positive and negative output ends of the dc bus assembly 3, a power module 5 is provided with first power input ends that are one-to-one corresponding to the first capacitor output ends and are electrically connected to the first and negative output ends, and another power module 5 is provided with second power input ends that are one-to-one corresponding to the second capacitor output ends and are electrically connected to the second power input ends. It should be noted that, when the integrated dc bus capacitor is adopted, the internal copper bars and cores of the dc bus capacitor 4 are required to be designed in a symmetrical structure, so as to ensure that the paths from the input end of the dc bus capacitor 4 to the input ends of the two power modules 5 are as consistent as possible.

The conductive bars comprise a positive conductive bar and a negative conductive bar, one end of the positive conductive bar is electrically connected with the positive electrode of the high-voltage direct-current connector 2, and the other end of the positive conductive bar is electrically connected with the positive electrode of the corresponding direct-current bus capacitor 4 through the positive electrode of each direct-current bus connecting terminal 30; one end of the negative electrode conducting bar is electrically connected with the negative electrode of the high-voltage direct-current connector 2, and the other end of the negative electrode conducting bar is electrically connected with the negative electrode of the corresponding direct-current bus capacitor 4 through the negative electrode of the direct-current bus connecting terminal 30.

In this embodiment, as shown in fig. 7, the filter circuit 31 includes a first Y capacitor set 311, a second Y capacitor set 312, a third Y capacitor set 313, a first differential mode magnetic ring set 315, a second X capacitor 314, and a second differential mode magnetic ring set 316, where the first Y capacitor set 311, the second Y capacitor set 312, the second X capacitor 314, and the second Y capacitor set are sequentially connected in parallel, two ends of the first Y capacitor set 311 are connected to the second Y capacitor set 312 through the first differential mode magnetic ring set 315, and two ends of the second Y capacitor set 312 are connected to the third Y capacitor set 313 through the second differential mode magnetic ring set 316. The first differential mode magnetic ring group 315 and the second differential mode magnetic ring group 316 respectively comprise two differential mode magnetic rings, the anode of the first Y capacitor group 311 is electrically connected to the anode of the second Y capacitor group 312 through one differential mode magnetic ring in the first differential mode magnetic ring group 315, the cathode of the first Y capacitor group 311 is electrically connected to the cathode of the second Y capacitor group 312 through the other differential mode magnetic ring in the first differential mode magnetic ring group 315, the anode of the second Y capacitor group 312 is electrically connected to the anode of the third Y capacitor group 313 through one differential mode magnetic ring in the second differential mode magnetic ring group 316, and the cathode of the second Y capacitor group 312 is electrically connected to the cathode of the third Y capacitor group 313 through the other differential mode magnetic ring in the second differential mode magnetic ring group 316. The first Y capacitor set 311, the second Y capacitor set 312, and the third Y capacitor set 313 each include two capacitors connected in series, and a circuit between the two capacitors is connected to a ground terminal 317.

The filter circuit 31 is not limited to the above structure, and in other embodiments, the filter circuit 31 may be adjusted according to the filter effect and EMC requirements, as shown in fig. 8, on the basis of the filter circuit 31 of this embodiment, a Y capacitor set 311 is removed, and a differential mode magnetic ring set 315 is a differential mode magnetic ring, and the differential mode magnetic ring is simultaneously electrically connected to the positive electrode and the negative electrode of the high voltage dc connector 2, and is simultaneously connected to two ends of a Y capacitor set two 312.

Further, as shown in fig. 1, each output terminal 62 is provided integrally with the ac busbar 61 of the same phase in one of the ac busbar assemblies 6. Specifically, each output terminal 62 is provided integrally with one of the ac busbars in the same phase. Preferably, the three ac busbars of one of the ac busbar assemblies 6 are respectively integrated with the output terminals 62 of the same phase. By adopting the arrangement, the structure of the alternating current busbar assembly 6 is more compact, the current path is short, the heat productivity is small, and the generated interference is less.

Further, the inverter assembly further includes a cooling component 7, and the cooling component 7 is disposed between the two power modules 5 and is disposed symmetrically with respect to a plane perpendicular to the thickness direction of the partition 12, and is configured to cool the two power modules 5 synchronously.

Specifically, the cooling assembly 7 includes two heat dissipation water channels 73 that are arranged in parallel and correspond to the power modules 5 one by one, and the two heat dissipation water channels 73 are symmetrically arranged with respect to a plane perpendicular to the thickness direction of the partition plate 12 and both flow through the cooling liquid. In this embodiment, the heat dissipation water channel 73 is provided on the corresponding power module 5.

The cooling module 7 further comprises a water inlet channel 71 and a water outlet channel 72, wherein the water inlet channel 71 and the water outlet channel 72 are symmetrically arranged around the partition plate 12; the downstream end of the water inlet channel 71 is provided with two first cooling water ports 731, and the two first cooling water ports 731 are respectively communicated with inlets of the two heat radiation channels 73; two second cooling water ports 732 are provided at the upstream end of the water outlet channel 72, and the two second cooling water ports 732 are respectively communicated with outlets of the two heat radiation water channels 73.

By adopting the cooling assembly 7 provided by the embodiment, the two power modules 5 can be synchronously cooled, so that the cooling effects of the two power modules 5 are similar.

More specifically, as shown in fig. 6, the main body box 11 is provided with a cooling water inlet 111 and a cooling water outlet 112, the cooling water inlet 111 is communicated with the two heat dissipation water channels 73 through the water inlet channel 71, the two heat dissipation water channels 73 are communicated with the cooling water outlet 112 through the water outlet channel 72, wherein the cooling water inlet 111 is connected with the water inlet pipe 74, and the cooling water outlet 112 is connected with the water outlet pipe 75.

In other embodiments, two heat dissipation water channels 73 may be disposed inside the partition plate 12 and distributed along the thickness direction of the partition plate 12. In other embodiments, the cooling module 7 may be configured to include only one heat dissipation channel 73 formed inside the partition plate 12, and the heat dissipation channels 73 are symmetrically disposed about a plane perpendicular to the thickness direction of the partition plate 12.

Further, the inverter assembly further includes a breather 82 for adjusting the air pressure balance between the inside and the outside of the main body case 11. Specifically, the main body case 11 is provided with a breather 82 mounting port 115 for mounting the breather 82.

Further, the ac busbar assembly 6 further includes a current detection assembly, in this embodiment, the current detection assembly includes three current sensors 83, and each of the three ac busbars 61 of one of the ac busbar assemblies 6 is provided with one current sensor 83 for detecting a current of the ac busbar 61. In other embodiments, the current detecting assembly may further employ two current sensors 83, the two current sensors 83 are disposed on two ac busbars 61 of one ac busbar assembly 6, and the current of the ac busbar 61 without the current sensor 83 in the ac busbar assembly 6 is calculated by using the current of the ac busbar 61 with the current sensor 83. In other embodiments, an integrated current sensor unit capable of measuring the current in two ac busbars 61 or three ac busbars 61 simultaneously may also be used.

The control board 80 is provided with a current signal interface, and the current detection assembly is electrically connected to the current signal interface through a wire harness; the main body box 11 is provided with a low-voltage connector 81 mounting port 114 for mounting the low-voltage connector 81, the control panel 80 is provided with a low-voltage connector 81 signal interface, and the low-voltage connector 81 is electrically connected to the low-voltage connector 81 signal interface through a wiring harness. The control panel 80 is provided with a high-voltage interlocking signal interface; the two drive plates 85 are electrically connected to the high voltage interlock signal interface by wiring harnesses.

Further, the inverter assembly further comprises an upper cover 13 and a lower cover 14, wherein the upper cover 13 is an aluminum alloy die casting, the upper cover 13 and the control board 80 are arranged on the same side of the control board 80, and the upper cover 13 is used for sealing the cavity provided with the control board 80. The lower cover 14 is an aluminum alloy die-cast member for sealing the cavity where the control board 80 is not provided.

Preferably, the upper cover 13 and the lower cover 14 are both provided with reinforcing ribs to meet NVH requirements.

The lower cover 14 is provided with a plurality of circumferentially arranged mounting posts 141, and the mounting posts 141 are provided with mounting holes for connecting the inverter assembly to an electric drive system.

The embodiment also provides an electric automobile which comprises an alternating current motor and the inverter assembly, wherein each output terminal 62 is electrically connected with a same-phase terminal on the alternating current motor.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. An inverter assembly, including a main body case (11), characterized in that, two cavities are formed inside the main body case (11) through a partition plate (12), further comprising:

two power modules (5) are arranged in parallel, and one power module (5) is arranged in each cavity;

and the cooling assembly (7) is arranged between the two power modules (5) and is symmetrically arranged relative to a plane vertical to the thickness direction of the partition plate (12) and used for synchronously cooling the two power modules (5).

2. The inverter assembly according to claim 1, wherein the cooling unit (7) includes two heat dissipation water passages (73) provided in parallel and corresponding to the power modules (5) one by one, the two heat dissipation water passages (73) being provided symmetrically with respect to a plane perpendicular to a thickness direction of the partition plate (12) and both having a coolant flowing therethrough.

3. The inverter assembly according to claim 2, wherein the heat dissipation water channels (73) are provided on the corresponding power modules (5), or both of the heat dissipation water channels (73) are provided inside the partition plate (12) and distributed in the thickness direction of the partition plate (12).

4. The inverter assembly according to claim 3, wherein the cooling assembly (7) further comprises a water inlet channel (71) and a water outlet channel (72), the water inlet channel (71) and the water outlet channel (72) each being symmetrically arranged with respect to the partition plate (12);

the downstream end of the water inlet channel (71) is provided with two first cooling water ports (731), and the two first cooling water ports (731) are respectively communicated with inlets of the two heat dissipation water channels (73); two second cooling water ports (732) are arranged at the upstream end of the water outlet channel (72), and the two second cooling water ports (732) are respectively communicated with outlets of the two heat dissipation water channels (73).

5. The inverter assembly according to claim 2, wherein the cooling member (7) includes a heat radiation passage (73) formed inside the partition plate (12), the heat radiation passage (73) being disposed symmetrically with respect to a plane perpendicular to a thickness direction of the partition plate (12).

6. The inverter assembly according to claim 1, wherein the bulkhead (12) is made of an electromagnetic shielding material, the inverter assembly further comprising:

the power module comprises a control board (80) and two driving boards (85), wherein one driving board (85) corresponding to the power module (5) is arranged in each cavity, and the control board (80) is communicated with the corresponding power module (5) through the driving board (85);

the shield plate, the shield plate including continuous be on a parallel with shield portion (841) of baffle (12), and connect in connecting portion (842) of main part case (11) inner wall, one of them power module (5) are located shield portion (841) with between baffle (12), control panel (80) are located shield portion (841) are dorsad one side of baffle (12).

7. The inverter assembly according to claim 1, further comprising a high voltage direct current connector (2), a direct current busbar assembly (3) and a direct current bus capacitor assembly electrically connected in sequence, wherein the direct current bus capacitor assembly is electrically connected with two power modules (5) simultaneously;

the power module is characterized by further comprising alternating current busbar assemblies (6) which correspond to the power modules (5) one by one and are electrically connected with each other, wherein the same-phase alternating current busbar (61) in the two alternating current busbar assemblies (6) is electrically connected and then connected with an output terminal (62);

the direct-current busbar assembly (3), the direct-current busbar capacitor assembly and the two alternating-current busbar assemblies (6) are symmetrically arranged on a plane perpendicular to the thickness direction of the partition plate (12).

8. The inverter assembly according to claim 7, wherein each of the output terminals (62) is provided integrally with the ac busbar (61) of the same phase in one of the ac busbar assemblies (6).

9. The inverter assembly according to claim 6, further comprising an upper cover (13) for sealing the cavity provided with the control board (80), and a lower cover (14) for sealing the cavity not provided with the control board (80).

10. An electric vehicle comprising the inverter assembly of any one of claims 1 to 9.