Inverter and automobile

Abstract

The utility model discloses an inverter comprising a housing, the outer wall of which is provided with a water inlet and a water outlet; the shell comprises an inner cavity, a water inlet channel and a water outlet channel are arranged in the inner cavity, the water inlet channel is communicated with the water inlet, and the water outlet channel is communicated with the water outlet; the first power module is fixedly mounted in the inner cavity and comprises a first cooling channel; the second power module and the first power module are arranged at an interval in the height direction, and the second power module comprises a second cooling channel; the water cooling plate is located between the first power module and the second power module; the water cooling plate comprises an in-plate water channel which communicates with the first cooling channel and the second cooling channel. The in-plate water channel communicates with the water inlet channel and the water outlet channel. According to the utility model, the number of parts for connecting the inverter and the whole vehicle cooling system can be reduced, the assembly process is simplified, and the leakage risk is reduced. The utility model further discloses an automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to an inverter and a car. Background Art

[0002] In the electric control system of new energy vehicles, the inverter is a device that connects the high-voltage battery and the motor power for mutual conversion, which plays a very important role in the normal driving of electric vehicles. In the design of the stacked dual inverter, each power module needs to form a cooling water channel with the shell, and is connected to the vehicle cooling system through the water inlet and outlet to achieve cooling of the power module. The dual inverter contains two power modules, so there are two cooling water channels, two water inlets, and two water outlets. In order to connect to the vehicle cooling system, it is necessary to first combine the two water inlets into one through an external auxiliary water pipe and a three-way valve, and the same applies to the water outlet. The water channel design is complex, with many parts and interfaces, a high risk of leakage, a large space required, and high difficulty in vehicle layout. Utility Model Content

[0003] The utility model aims to solve the problems of complicated water channel design, many parts, many interfaces and high leakage risk when connecting the inverter to the cooling system of the whole vehicle. The utility model provides an inverter and a vehicle, which can reduce the number of parts, simplify the assembly process and reduce the risk of leakage.

[0004] In order to solve the above technical problems, the embodiment of the utility model discloses an inverter, comprising: a shell, an outer wall of the shell is provided with a water inlet and a water outlet; the shell comprises an inner cavity, a water inlet channel and a water outlet channel are provided in the inner cavity, the water inlet channel is connected to the water inlet, and the water outlet channel is connected to the water outlet; a first power module is fixedly installed in the inner cavity, the first power module comprises a first cooling channel; a second power module is spaced apart from the first power module in a height direction, the second power module comprises a second cooling channel; a water cooling plate is provided in the height direction, The water-cooling plate is located between the first power module and the second power module; the water-cooling plate includes an inner-plate water channel, which is respectively connected to the first cooling channel and the second cooling channel; the inner-plate water channel is connected to the water inlet channel and the water outlet channel; the coolant can enter the inner-plate water channel from the water inlet channel, a part of the coolant in the inner-plate water channel enters the first cooling channel, then flows back to the inner-plate water channel, and then flows into the water outlet channel; another part of the coolant in the inner-plate water channel enters the second cooling channel, then flows back to the inner-plate water channel, and then flows into the water outlet channel.

[0005] By adopting the above technical solution, the coolant from the outside flows through the water inlet on the outer wall of the shell into the water inlet channel, and then flows from the water inlet channel into the water channel inside the board. A part of the coolant in the water channel inside the board flows into the first cooling channel, and finally returns to the water channel inside the board, and then flows into the water outlet channel, and finally flows out from the water outlet on the outer wall of the shell. Another part of the coolant in the water channel inside the board flows into the second cooling channel, and finally returns to the water channel inside the board, and then flows into the water outlet channel, and finally flows out from the water outlet on the outer wall of the shell. That is, the coolant enters the inverter from the same water inlet on the shell, and flows out of the inverter from the same water outlet on the shell.

[0006] In the above process, the process of coolant flowing through the first cooling channel is the process of taking away the heat generated by the heat-generating components in the first power module, and the process of coolant flowing through the second cooling channel is the process of taking away the heat generated by the heat-generating components in the second power module, thereby achieving heat dissipation of the first power module and the second power module.

[0007] In summary, compared with the existing implementation scheme, this scheme integrates the cooling water channel that should be set between the shell and the first power module and the second power module into the water cooling plate, so that there is no need to use external auxiliary water pipes and three-way valves to realize the connection of the internal coolant flow path of the inverter with the cooling system of the whole vehicle. The inverter of this scheme has high integration, few parts, and the connection leakage risk between the inverter and the cooling system of the whole vehicle is relatively small. The assembly process is simple, the assembly cost is low, and the difficulty of vehicle layout is low.

[0008] According to another specific embodiment of the present utility model, the intra-plate water channel includes an intra-plate diversion water channel, a first intra-plate water channel and a second intra-plate water channel, the intra-plate diversion water channel is connected to the water inlet channel and simultaneously connects the first intra-plate water channel and the second intra-plate water channel; the first intra-plate water channel is connected to both ends of the first cooling channel; the second intra-plate water channel is connected to both ends of the second cooling channel; the first intra-plate water channel includes a rear end water outlet, the second intra-plate water channel includes a front end water outlet, the front end water outlet and the rear end water outlet are respectively connected to the water outlet water channel.

[0009] By adopting the above technical solution, the coolant from the water inlet channel flows into the first plate inner water channel and the second plate inner water channel respectively through the plate inner diversion channel, thereby realizing the diversion of the coolant in the water inlet channel.

[0010] Both ends of the first cooling channel are connected to the water channel in the first plate, so the coolant entering from one end of the first cooling channel flows to the other end of the first cooling channel, and flows out from the other end of the first cooling channel and flows back to the water channel in the first plate. Similarly, both ends of the second cooling channel are connected to the water channel in the second plate, so the coolant entering from one end of the second cooling channel flows to the other end of the second cooling channel, and flows out from the other end of the second cooling channel and flows back to the water channel in the second plate.

[0011] The coolant in the water channel of the first plate can flow into the water outlet channel from the rear end water outlet, and the coolant in the water channel of the second plate can flow into the water outlet channel from the front end water outlet. The coolant from the water channel of the first plate and the water channel of the second plate merge in the water outlet channel and flow together to the water outlet on the outer wall of the shell.

[0012] According to another specific embodiment of the utility model, the intra-board diversion water channel includes a total water inlet and a middle diversion port that are connected, the total water inlet is connected to the water inlet water channel; the middle diversion port is connected to the first intra-board water channel and the second intra-board water channel respectively.

[0013] By adopting the above technical solution, the coolant in the water inlet channel enters the board branch channel through the main water inlet, and then at the middle branch port, part of the coolant enters the first board channel, and the other part of the coolant continues to flow to the second board channel.

[0014] According to another specific embodiment of the utility model, the first in-board water channel includes a first pipeline and a second pipeline, the first pipeline is connected to the middle diversion port; the second pipeline is connected to the rear end water outlet; the two ends of the first cooling channel of the first power module are respectively connected to the first pipeline and the second pipeline.

[0015] With the above technical solution, part of the coolant in the diversion channel in the board flows into the first pipeline through the middle diversion port, and then the coolant in the first pipeline flows into the first cooling channel, and then flows into the second pipeline from the first cooling channel, and the coolant in the second pipeline flows from the rear end outlet to the outlet water channel. The process of the coolant flowing in the first cooling channel is the process of taking away the heat in the first power module, thereby achieving heat dissipation for the first power module.

[0016] According to another specific embodiment of the utility model, a first water inlet and a first water outlet are provided on the lower surface of the water-cooled plate, the first water inlet is connected to the first pipeline, and the first water outlet is connected to the second pipeline; a second water inlet and a second water outlet are provided at both ends of the first cooling channel respectively; the first water inlet and the second water inlet are sealed and connected; the first water outlet and the second water outlet are sealed and connected.

[0017] With the above technical solution, the first water inlet and the second water inlet are arranged opposite to each other in the height direction, and the two are in close contact with each other, so that the coolant in the first pipeline flows out through the first water inlet and flows into the first cooling channel through the second water inlet. Similarly, the first water outlet and the second water outlet are arranged opposite to each other in the height direction, and the two are in close contact with each other, so that the coolant in the first cooling channel flows out of the first cooling channel through the second water outlet and flows into the second pipeline through the first water outlet.

[0018] According to another specific embodiment of the utility model, sealing grooves are provided around the outer peripheries of the first water inlet and the first water outlet, the sealing grooves are used to embed sealing rings, and the lower surface of the water cooling plate and the upper surface of the first power module are at least partially fitted to squeeze the sealing ring.

[0019] By adopting the above technical solution, the sealing ring partially extends out of the sealing groove, and the sealing ring is compressed by the fitting and squeezing of the water-cooling plate and the first power module, thereby achieving sealing at the connection between the two water inlets (the first water inlet and the second water inlet, the first water outlet and the second water outlet), thereby preventing the coolant from leaking in the process of flowing into or out of the first cooling channel, affecting the heat dissipation effect of the first power module, and further affecting the normal operation of the inverter.

[0020] According to another specific embodiment of the utility model, the rear end water outlet of the first plate inner water channel and the water outlet water channel are sealed and connected through a first rubber tube.

[0021] By adopting the above technical solution, the rear end water outlet and the water outlet channel are spaced apart in the height direction, so the rear end water outlet and the water outlet channel are connected by the first rubber tube, that is, the first rubber tube is used as a medium to allow the coolant in the second pipeline of the water channel in the first plate to flow into the first rubber tube through the rear end water outlet, and then flow into the water outlet channel.

[0022] According to another specific embodiment of the utility model, the water outlet channel is provided with a first through hole, and the outer periphery of the first rubber tube is convexly provided with a first sealing portion and a second sealing portion, the first sealing portion and the inner hole wall of the rear end water outlet are interference fit; the second sealing portion and the inner hole wall of the first through hole are interference fit.

[0023] By adopting the above technical solution, the first sealing part is radially pressed against the inner hole wall of the rear end water outlet, and the second sealing part is radially pressed against the inner hole wall of the first through hole. In this way, on the one hand, the first rubber tube is fixedly connected to the rear end water outlet and the water outlet channel respectively, so that the first rubber tube can transport the coolant from the rear end water outlet to the water outlet channel. On the other hand, the first sealing part and the second sealing part realize the sealed connection between the first rubber tube and the rear end water outlet and the water outlet channel respectively, so as to avoid leakage of the coolant in the process of flowing from the rear end water outlet to the water outlet channel.

[0024] According to another specific embodiment of the utility model, the water channel in the second plate includes a third pipeline and a fourth pipeline, the third pipeline is connected to the middle diversion port; the fourth pipeline is connected to the front water outlet; the two ends of the second cooling channel of the second power module are respectively connected to the third pipeline and the fourth pipeline.

[0025] With the above technical solution, the coolant in the diverter channel in the board flows into the third pipeline through the middle diverter port, and then the coolant in the third pipeline flows into the second cooling channel, and then flows into the fourth pipeline from the second cooling channel, and the coolant in the fourth pipeline flows from the front water outlet to the outlet water channel. The process of the coolant flowing in the second cooling channel is the process of taking away the heat in the second power module, thereby achieving heat dissipation for the second power module.

[0026] According to another specific embodiment of the utility model, a third water inlet and a third water outlet are provided on the upper surface of the water-cooled plate, the third water inlet is connected to the third pipeline, and the third water outlet is connected to the fourth pipeline; a fourth water inlet and a fourth water outlet are respectively provided at both ends of the second cooling channel; the third water inlet and the fourth water inlet are sealed and connected; the third water outlet and the fourth water outlet are sealed and connected.

[0027] With the above technical solution, the third water inlet and the fourth water inlet are arranged opposite to each other in the height direction, and the two are fitted together, so that the coolant in the third pipeline flows out through the third water inlet and flows into the second cooling channel through the fourth water inlet. Similarly, the third water outlet and the fourth water outlet are arranged opposite to each other in the height direction, and the two are fitted together, so that the coolant in the second cooling channel flows out of the second cooling channel through the fourth water outlet, and then flows into the fourth pipeline through the third water outlet.

[0028] According to another specific embodiment of the utility model, sealing grooves are provided around the outer peripheries of the third water inlet and the third water outlet, and the sealing grooves are used to embed sealing rings, and the upper surface of the water cooling plate and the lower surface of the second power module are at least partially fitted to squeeze the sealing ring.

[0029] By adopting the above technical solution, the sealing ring partially extends out of the sealing groove, and the sealing ring is compressed by the fitting and squeezing of the water-cooling plate and the second power module, thereby achieving sealing at the connection between the two water inlets (the third water inlet and the fourth water inlet, the third water outlet and the fourth water outlet), thereby preventing the coolant from leaking in the process of flowing into or out of the second cooling channel, affecting the heat dissipation effect of the second power module, and further affecting the normal operation of the inverter.

[0030] According to another specific embodiment of the utility model, the front end water outlet of the second plate inner water channel and the water outlet water channel are sealed and connected through a second rubber tube.

[0031] By adopting the above technical solution, the front water outlet and the outlet waterway are connected by the second rubber tube, that is, the coolant in the fourth pipeline of the waterway in the second plate flows into the second rubber tube through the front water outlet, and then flows into the outlet waterway using the second rubber tube as a medium.

[0032] According to another specific embodiment of the utility model, the water outlet channel is provided with a second through hole, and the outer periphery of the second rubber tube is convexly provided with a third sealing portion and a fourth sealing portion, the third sealing portion and the inner hole wall of the front end water outlet are interference fit; the fourth sealing portion and the inner hole wall of the second through hole are interference fit.

[0033] By adopting the above technical solution, the third sealing part is radially pressed against the inner hole wall of the front water outlet, and the fourth sealing part is radially pressed against the inner hole wall of the second through hole. In this way, on the one hand, the second rubber tube is fixedly connected to the front water outlet and the water outlet channel respectively, so as to realize the second rubber tube to transport the coolant from the front water outlet to the water outlet channel. On the other hand, the third sealing part and the fourth sealing part realize the sealed connection between the second rubber tube and the front water outlet and the water outlet channel respectively, so as to avoid leakage of the coolant in the process of flowing from the front water outlet to the water outlet channel.

[0034] According to another specific implementation of the utility model, the main water inlet is sealed and connected to the water inlet channel through a third rubber tube.

[0035] By adopting the above technical solution, the main water inlet and the water inlet channel are connected through the third rubber tube, so that the coolant in the water inlet channel flows into the third rubber tube through the main water inlet, and then flows into the diversion channel in the board.

[0036] According to another specific embodiment of the utility model, a fifth sealing portion and a sixth sealing portion are convexly provided on the outer periphery of the third rubber tube, and the fifth sealing portion and the inner hole wall of the main water inlet are interference fit; the sixth sealing portion and the inner wall of the water inlet channel are interference fit.

[0037] By adopting the above technical solution, the fifth sealing part is radially pressed against the inner hole wall of the main water inlet, and the sixth sealing part is radially pressed against the inner hole wall of the water inlet channel. In this way, on the one hand, the third rubber tube is fixedly connected to the main water inlet and the water inlet channel respectively, so as to realize the third rubber tube to transport the coolant from the water inlet channel to the main water inlet. On the other hand, the fifth sealing part and the sixth sealing part realize the sealed connection between the third rubber tube and the main water inlet and the water inlet channel respectively, so as to avoid leakage of the coolant in the process of flowing from the water inlet channel to the main water inlet.

[0038] The utility model also discloses a car, comprising: a whole car cooling system and the inverter mentioned above, wherein the whole car cooling system is connected to the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional diagram of an inverter according to an embodiment of the utility model is shown;

[0040] Figure 2 An exploded view of an inverter according to an embodiment of the utility model is shown;

[0041] Figure 3 A three-dimensional diagram showing a housing of an embodiment of the utility model;

[0042] Figure 4 A top view of an inverter according to an embodiment of the utility model is shown;

[0043] Figure 5 Show Figure 4 A cross-sectional view of the inverter along line AA is shown;

[0044] Figure 6 Show Figure 4 A cross-sectional view of the inverter along line CC is shown;

[0045] Figure 7 Show Figure 4 A cross-sectional view of the inverter along line BB is shown;

[0046] Figure 8 Show Figure 4 A cross-sectional view of the inverter along line DD is shown;

[0047] Fig. 9 Show Figure 4 A cross-sectional view of the inverter along line EE is shown;

[0048] Fig.10 The three-dimensional diagram of the water cooling plate of the utility model embodiment is shown Figure 1 ;

[0049] Fig.11 The three-dimensional diagram of the water cooling plate of the utility model embodiment is shown Figure 2 ;

[0050] Fig.12 A perspective view of a water cooling plate according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0051] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0052] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0053] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and 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 therefore cannot be understood as a limitation on the utility model.

[0054] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0055] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0056] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0057] refer to Figures 1 to 4 The present application provides an inverter 1 , comprising a housing 2 , a first power module 3 , a second power module 5 and a water cooling plate 4 .

[0058] Recombination Figure 5 The outer wall 220 of the shell 2 is provided with a water inlet 200 and a water outlet 201; the shell 2 includes an inner cavity 202, and the inner cavity 202 is provided with a water inlet channel 203 and a water outlet channel 204, the water inlet channel 203 is connected to the water inlet 200, and the water outlet channel 204 is connected to the water outlet 201.

[0059] Exemplarily, the water inlet 200 is connected to the first external water pipe 12, the water outlet 201 is connected to the second external water pipe 13, and both the first external water pipe 12 and the second external water pipe 13 are connected to the whole vehicle cooling system to provide a coolant source for the water inlet channel 203 through the whole vehicle cooling system, and recover the coolant from the water outlet channel 204, thereby forming a circulation loop in which the coolant flows between the inverter 1 and the whole vehicle cooling system.

[0060] Exemplarily, the housing 2 is rectangular, with an open upper end and a closed lower end to form an inner cavity 202 to accommodate the first power module 3 and the second power module 5 described below. Those skilled in the art will appreciate that the housing 2 can have a variety of shapes, and the housing 2 can also be circular or other polygonal shapes.

[0061] Exemplarily, the water inlet channel 203 is located above the water outlet channel 204, and the water inlet channel 203 is arranged along the height direction ( Figure 3 The water outlet channel 204 extends upward along the length direction of the shell 2 ( Figure 3 Correspondingly, the water inlet 200 and the water outlet 201 are arranged at intervals along the height direction, wherein the water inlet 200 is located above the water outlet 201.

[0062] The water inlet channel 203 is open at one end along the length direction of the shell 2 (i.e., in the direction toward the cavity wall of the inner cavity 202) to communicate with the water inlet 200 outside the inner cavity 202; the water inlet channel 203 is open at the upper end along the height direction to communicate with the in-plate diversion channel 41 of the water-cooled plate 4 described later, which will be described in detail later.

[0063] The outlet waterway 204 is open at one end along the length direction of the shell 2 (i.e., in the direction toward the cavity wall of the inner cavity 202) to communicate with the water outlet 201 outside the inner cavity 202; the upper wall along the height direction of the outlet waterway 204 is provided with a first through hole 206 and a second through hole 207, and the first through hole 206 and the second through hole 207 are arranged at intervals along the length direction of the shell 2. The first through hole 206 is used to connect to the rear end water outlet of the first plate waterway 42 described later, and the second through hole 207 is used to connect to the front end water outlet of the second plate waterway 43 described later, which will be described in detail later.

[0064] refer to Figure 2 , Figure 6 and Figure 7 The first power module 3 is fixedly installed in the inner cavity 202 . The first power module 3 includes a first cooling channel 300 . The first cooling channel 300 is used for cooling liquid to flow through to take away the heat generated by the heat-generating components inside the first power module 3 .

[0065] refer to Figure 2 , Figure 8 and Fig. 9 The second power module 5 and the first power module 3 are arranged in the height direction ( Figure 2 The second power module 5 is arranged at intervals (as shown in the Z direction), and the second power module 5 includes a second cooling channel 500, and the second cooling channel 500 is used for cooling liquid to flow through to take away the heat generated by the heat-generating components inside the second power module 5.

[0066] Exemplarily, the second power module 5 is arranged opposite to the first power module 3 in the height direction, and the second power module 5 is rotated 180° in the horizontal plane relative to the first power module 3, so that the first cooling channel 300 and the second cooling channel 500 are arranged in the length direction ( Figure 2 That is, along the length direction of the shell 2, the second cooling channel 500 is closer to the water inlet 200 and the water outlet 201 on the shell 2, while the first cooling channel 300 is far away from the water inlet 200 and the water outlet 201 on the shell 2.

[0067] Along the height direction ( Figure 2 The water cooling plate 4 is located between the first power module 3 and the second power module 5. For example, the water cooling plate 4, the first power module 3 and the second power module 5 are all roughly rectangular, but the present application does not limit this. The water cooling plate 4, the first power module 3 and the second power module 5 can be set to a suitable shape according to actual use needs.

[0068] Exemplarily, the water cooling plate 4 is fixedly connected to the first power module 3 and the second power module 5 respectively.

[0069] Specifically, refer to Figure 2 and Fig.10 A plurality of first connection holes 330 are provided at intervals on the outer edge of the first power module 3, and a first connection column 440 corresponding to the plurality of first connection holes 330 is provided on the lower surface 44 of the water-cooling plate 4, and each first connection column 440 is provided with a first threaded hole 441, and each first connection hole 330 and the corresponding first threaded hole 441 are passed through by a bolt 11 to realize a fixed connection between the water-cooling plate 4 and the first power module 3.

[0070] In addition, a pair of diagonal corners of the first power module 3 are provided with first positioning holes 331, and correspondingly, a pair of diagonal corners of the lower surface 44 of the water-cooling plate 4 are provided with first positioning columns 442. Before the first power module 3 and the water-cooling plate 4 are fastened with bolts, the first positioning columns 442 pass through the first positioning holes 331 to achieve pre-positioning of the first power module 3 and the water-cooling plate 4, thereby facilitating subsequent bolt fastening, and further ensuring the accuracy of the position of the connection between the first power module 3 and the water-cooling plate 4.

[0071] Likewise, reference Figure 2 and Fig.11A plurality of second connection holes 510 are provided at intervals on the outer edge of the second power module 5, and a plurality of second connection columns 443 corresponding to the plurality of second connection holes 510 are provided on the upper surface 45 of the water cooling plate 4, and each second connection column 443 is provided with a second threaded hole 444, and each second connection hole 510 and the corresponding second threaded hole 444 are provided for the bolt 10 to pass through, so as to realize the fixed connection between the water cooling plate 4 and the second power module 5.

[0072] A pair of diagonal corners of the second power module 5 are further provided with second positioning holes 511, and correspondingly, a pair of diagonal corners of the upper surface 45 of the water-cooling plate 4 are provided with second positioning columns 445. Before the second power module 5 and the water-cooling plate 4 are fastened with bolts, the second positioning columns 445 pass through the second positioning holes 511 to achieve pre-positioning of the second power module 5 and the water-cooling plate 4, thereby facilitating subsequent bolt fastening, and further ensuring the accuracy of the position of the connection between the second power module 5 and the water-cooling plate 4.

[0073] In this embodiment, the first connection hole 330, the second connection hole 510 and the corresponding first threaded hole 441 and second threaded hole 444 are all 6, that is, the water-cooling plate 4 and the first power module 3 have 6 connection points, and similarly, the water-cooling plate 4 and the second power module 5 also have 6 connection points, thereby ensuring the stability and reliability of the connection between the water-cooling plate 4 and the first power module 3 and the water-cooling plate 4 and the second power module 5. However, this application does not limit this, and the first connection hole 330, the second connection hole 510 and the corresponding first threaded hole 441 and second threaded hole 444 can also be set to other numbers, such as 4, 8, 10, etc.

[0074] refer to Figure 2 and Figure 3 The inner cavity 202 is provided with four Figure 3 The third connecting column 208 extending in the Z direction (shown in the middle), and the four third connecting columns 208 are all provided with a third threaded hole 209. The four corners of the water cooling plate 4 are provided with third connecting holes 450. After the water cooling plate 4 is fixedly connected to the first power module 3 and the second power module 5 respectively, the bolts 9 are inserted into the third connecting holes 450 and the third threaded holes 209 to fix the first power module 3, the second power module 5 and the water cooling plate 4 as a whole to the inner cavity 202 of the housing 2.

[0075] In addition, a pair of diagonal portions of the inner cavity 202 are provided along the height direction ( Figure 3 A third positioning column 210 extends (as shown in the Z direction), and a pair of diagonal portions of the water-cooling plate 4 are provided with third positioning holes 451 corresponding to the third positioning columns 210. The third positioning columns 210 are passed through the third positioning holes 451 to achieve pre-positioning of the water-cooling plate 4 and the shell 2, which is beneficial for subsequent bolt locking, thereby ensuring the accuracy of the position of the connection between the water-cooling plate 4 and the shell 2.

[0076] Those skilled in the art will appreciate that the first power module 3 and the water-cooling plate 4, the second power module 5 and the water-cooling plate 4, and the housing 2 and the water-cooling plate 4 may be fixedly connected in various ways, such as snap-on, riveting, and other known connection methods.

[0077] refer to Figure 5 , Figure 6 and Figure 8 The water-cooled plate 4 includes an inner plate water channel 40, which is respectively connected to the first cooling channel 300 and the second cooling channel 500. Specifically, a part of the inner plate water channel 40 is connected to the first cooling channel 300, and a part of the inner plate water channel 40 is connected to the second cooling channel 500.

[0078] The plate water channel 40 communicates with the water inlet channel 203 and the water outlet channel 204. That is, the coolant in the water inlet channel 203 can enter the plate water channel 40 and flow out to the water outlet channel 204.

[0079] The coolant from the outside flows from the first external water pipe 12 through the water inlet 200 on the outer wall of the shell 2 into the water inlet channel 203, and then flows from the water inlet channel 203 into the water channel 40 inside the board. A portion of the coolant in the water channel 40 inside the board flows into the first cooling channel 300, and finally returns to the water channel 40 inside the board, and then flows into the water outlet channel 204, and finally flows into the second external water pipe 13 and flows out from the water outlet 201 on the outer wall of the shell 2. Another portion of the coolant in the water channel 40 inside the board enters the second cooling channel 500, and then flows back to the water channel 40 inside the board, and then flows into the water outlet channel 204, and finally flows into the second external water pipe 13 and flows out from the water outlet 201 on the outer wall of the shell 2. That is, the coolant enters the inverter 1 from the same water inlet 200, and flows out of the inverter 1 from the same water outlet 201.

[0080] In the above process, the process of the coolant flowing through the first cooling channel 300 is the process of taking away the heat generated by the heat-generating components in the first power module 3, and the process of the coolant flowing through the second cooling channel 500 is the process of taking away the heat generated by the heat-generating components in the second power module 5, thereby realizing the heat dissipation of the first power module 3 and the second power module 5.

[0081] In summary, compared with the existing implementation scheme, the present solution integrates the cooling water channel that should have been arranged between the shell 2 and the first power module 3 and the second power module 5 on the water cooling plate 4, so that there is no need to use external auxiliary water pipes and three-way valves to realize the connection between the internal coolant flow path of the inverter and the cooling system of the whole vehicle. The inverter of the present solution has high integration, few parts, and a small risk of leakage in the connection between the inverter and the cooling system of the whole vehicle. The assembly process is simple, the assembly cost is low, and the difficulty of vehicle layout is low.

[0082] refer to Figure 5 , Fig.11 and Fig.12 In some possible implementations, the in-board water channel 40 includes an in-board diversion water channel 41, a first in-board water channel 42, and a second in-board water channel 43. The in-board diversion water channel 41 is connected to the water inlet channel 203 and simultaneously connected to the first in-board water channel 42 and the second in-board water channel 43. That is, the coolant from the water inlet channel 203 flows into the first in-board water channel 42 and the second in-board water channel 43 respectively through the in-board diversion water channel 41, thereby realizing the diversion of the coolant in the water inlet channel 203.

[0083] refer to Figure 6 , the first plate inner water channel 42 is connected to both ends of the first cooling channel 300. Exemplarily, both ends of the first cooling channel 300 are connected to the first plate inner water channel 42, and the coolant entering from one end of the first cooling channel 300 flows to the other end of the first cooling channel 300, and flows out from the other end of the first cooling channel 300 and flows back to the first plate inner water channel 42.

[0084] refer to Figure 8 , the second plate water channel 43 is connected to both ends of the second cooling channel 500. Exemplarily, both ends of the second cooling channel 500 are connected to the second plate water channel 43, and the coolant entering from one end of the second cooling channel 500 flows to the other end of the second cooling channel 500, and flows out from the other end of the second cooling channel 500 and flows back to the second plate water channel 43.

[0085] refer to Figure 5 , Fig.10 and Fig.11 , the first plate inner water channel 42 includes a rear end water outlet 420, the second plate inner water channel 43 includes a front end water outlet 430, and the front end water outlet 430 and the rear end water outlet 420 are respectively connected to the water outlet channel 204. That is, the coolant in the first plate inner water channel 42 can flow into the water outlet channel 204 from the rear end water outlet 420, and the coolant in the second plate inner water channel 43 can flow into the water outlet channel 204 from the front end water outlet 430, then the coolant from the first plate inner water channel 42 and the second plate inner water channel 43 merge in the water outlet channel 204 and flow together to the water outlet 201 on the outer wall of the shell 2.

[0086] In some possible implementations, the in-board diversion channel 41 includes a main water inlet 410 and a middle diversion port 411 that are connected to each other. The main water inlet 410 is connected to the inlet channel 203; the middle diversion port 411 is respectively connected to the first in-board water channel 42 and the second in-board water channel 43. Exemplarily, the coolant in the inlet channel 203 enters the in-board diversion channel 41 through the main water inlet 410, and then at the middle diversion port 411, part of the coolant enters the first in-board water channel 42, and the other part of the coolant continues to flow to the second in-board water channel 43.

[0087] refer to Figure 6 , Figures 10 to 12 In some possible embodiments, the first plate water channel 42 includes a first pipeline 421 and a second pipeline 422, the first pipeline 421 is connected to the middle diversion port 411; the second pipeline 422 is connected to the rear end water outlet 420; the two ends of the first cooling channel 300 of the first power module 3 are respectively connected to the first pipeline 421 and the second pipeline 422.

[0088] Exemplarily, the coolant in the board diversion channel 41 passes through the middle diversion port 411, and part of the coolant flows into the first pipeline 421, and then the coolant in the first pipeline 421 flows into the first cooling channel 300, and then flows into the second pipeline 422 from the first cooling channel 300, and the coolant in the second pipeline 422 flows from the rear end outlet 420 to the outlet channel 204. The process of the coolant flowing in the first cooling channel 300 is the process of taking away the heat in the first power module 3, thereby realizing the heat dissipation of the first power module 3.

[0089] refer to Figure 6 and Fig.10 In some possible embodiments, a first water inlet 423 and a first water outlet 424 are provided on the lower surface 44 of the water-cooling plate 4, the first water inlet 423 is connected to the first pipeline 421, and the first water outlet 424 is connected to the second pipeline 422; a second water inlet 304 and a second water outlet 305 are provided at both ends of the first cooling channel 300; the first water inlet 423 and the second water inlet 304 are sealed and connected; the first water outlet 424 and the second water outlet 305 are sealed and connected.

[0090] Exemplarily, the first water inlet 423 and the second water inlet 304 are arranged opposite to each other in the height direction, and the two are fitted together, so that the coolant in the first pipeline 421 flows out through the first water inlet 423 and flows into the first cooling channel 300 through the second water inlet 304. Similarly, the first water outlet 424 and the second water outlet 305 are arranged opposite to each other in the height direction, and the two are fitted together, so that the coolant in the first cooling channel 300 flows out of the first cooling channel 300 through the second water outlet 305 and then flows into the second pipeline 422 through the first water outlet 424.

[0091] In some possible embodiments, a sealing groove 425 is provided around the outer periphery of the first water inlet 423 and the first water outlet 424 , and the sealing groove 425 is used to embed a sealing ring 426 , and the lower surface 44 of the water cooling plate 4 and the upper surface of the first power module 3 are at least partially in contact with each other to squeeze the sealing ring 426 .

[0092] Exemplarily, the first water inlet 423, the first water outlet 424, the second water inlet 304, and the second water outlet 305 are all in a rounded rectangular shape, and similarly, the sealing groove 425 is also in a rounded rectangular shape. However, the present application does not limit this, and the shapes of the first water inlet 423, the first water outlet 424, the second water inlet 304, the second water outlet 305, and the sealing groove 425 can be various, for example, they can also be circular, elliptical, or other polygonal shapes.

[0093] The sealing ring 426 partially extends out of the sealing groove 425, and the fitting and squeezing of the water-cooling plate 4 and the first power module 3 causes the sealing ring 426 to be compressed, thereby achieving sealing at the connection between the two water inlets (the first water inlet 423 and the second water inlet 304, the first water outlet 424 and the second water outlet 305), thereby preventing the coolant from leaking in the process of flowing into or out of the first cooling channel 300, affecting the heat dissipation effect of the first power module 3, and further affecting the normal operation of the inverter 1.

[0094] refer to Figure 5 , Figure 7 and Fig.10 In some possible implementations, the rear end water outlet 420 of the first plate inner water channel 42 is sealed and connected to the water outlet channel 204 through the first rubber tube 6. Exemplarily, the rear end water outlet 420 and the water outlet channel 204 are spaced apart in the height direction, so the rear end water outlet 420 and the water outlet channel 204 are connected through the first rubber tube 6, that is, the first rubber tube 6 is used as a medium to allow the coolant in the second pipeline 422 of the first plate inner water channel 42 to flow into the first rubber tube 6 through the rear end water outlet 420, and then flow into the water outlet channel 204.

[0095] Recombination Figure 3 In some possible embodiments, the water outlet channel 204 is provided with a first through hole 206, and the outer periphery of the first rubber tube 6 is convexly provided with a first sealing portion 60 and a second sealing portion 61, and the first sealing portion 60 and the inner hole wall of the rear end water outlet 420 are interference fit; the second sealing portion 61 and the inner hole wall of the first through hole 206 are interference fit. Exemplarily, the first rubber tube 6 is in a shape similar to I. The first sealing portion 60 and the second sealing portion 61 are respectively located at the upper and lower ends of the outer wall of the first rubber tube 6, and the first sealing portion 60 and the second sealing portion 61 are radially protruded from the outer periphery of the first rubber tube 6, then the upper end of the first rubber tube 6 is inserted into the rear end water outlet 420, and the first sealing portion 61 is radially pressed against the inner hole wall of the rear end water outlet 420, and the lower end of the first rubber tube 6 is inserted into the first through hole 206 on the water outlet channel 204, and the second sealing portion 61 is radially pressed against the inner hole wall of the first through hole 206.

[0096] In this way, on the one hand, the first rubber tube 6 is fixedly connected to the rear end water outlet 420 and the water outlet channel 204 respectively, so that the first rubber tube 6 can transport the coolant from the rear end water outlet 420 to the water outlet channel 204. On the other hand, the first sealing portion 60 and the second sealing portion 61 realize the sealed connection between the first rubber tube 6 and the rear end water outlet 420 and the water outlet channel 204 respectively, so as to avoid leakage of the coolant in the process of flowing from the rear end water outlet 420 to the water outlet channel 204.

[0097] refer to Figure 5 , Figure 8 , Fig.11 and Fig.12 In some possible implementations, the second in-board water channel 43 includes a third pipeline 431 and a fourth pipeline 432, the third pipeline 431 is connected to the middle diversion port 411; the fourth pipeline 432 is connected to the front water outlet 430; and the two ends of the second cooling channel 500 of the second power module 5 are respectively connected to the third pipeline 431 and the fourth pipeline 432. Exemplarily, part of the coolant in the in-board diversion water channel 41 flows into the third pipeline 431 through the middle diversion port 411, and then the coolant in the third pipeline 431 flows into the second cooling channel 500, and then flows into the fourth pipeline 432 from the second cooling channel 500, and the coolant in the fourth pipeline 432 flows from the front water outlet 430 to the outlet water channel 204. Among them, the process of the coolant flowing in the second cooling channel 500 is the process of taking away the heat in the second power module 5, thereby realizing the heat dissipation of the second power module 5.

[0098] In some possible embodiments, the upper surface 45 of the water-cooling plate 4 is provided with a third water inlet 433 and a third water outlet 434, the third water inlet 433 is connected to the third pipeline 431, and the third water outlet 434 is connected to the fourth pipeline 432; the second cooling channel 500 is provided with a fourth water inlet 504 and a fourth water outlet 505 at both ends; the third water inlet 433 and the fourth water inlet 504 are sealed and connected; the third water outlet 434 and the fourth water outlet 505 are sealed and connected.

[0099] Exemplarily, the third water inlet 433 and the fourth water inlet 504 are arranged opposite to each other in the height direction, and the two are fitted together, so that the coolant in the third pipeline 431 flows out through the third water inlet 433 and flows into the second cooling channel 500 through the fourth water inlet 504. Similarly, the third water outlet 434 and the fourth water outlet 505 are arranged opposite to each other in the height direction, and the two are fitted together, so that the coolant in the second cooling channel 500 flows out of the second cooling channel 500 through the fourth water outlet 505 and then flows into the fourth pipeline 432 through the third water outlet 434.

[0100] In some possible embodiments, a sealing groove 506 is provided around the outer periphery of the third water inlet 433 and the third water outlet 434 , and the sealing groove 506 is used to embed a sealing ring 507 . The upper surface 45 of the water cooling plate 4 and the lower surface of the second power module 5 are at least partially in contact with each other to squeeze the sealing ring 507 .

[0101] Exemplarily, the third water inlet 433, the third water outlet 434, the fourth water inlet 504 and the fourth water outlet 505 are all in a rounded rectangular shape, and similarly, the sealing groove 506 is also in a rounded rectangular shape. However, the present application does not limit this, and the shapes of the third water inlet 433, the third water outlet 434, the fourth water inlet 504 and the fourth water outlet 505 and the sealing groove 506 can be various, for example, they can also be circular, elliptical or other polygonal shapes.

[0102] The sealing ring 507 partially extends out of the sealing groove 506, and the fitting and squeezing of the water-cooling plate 4 and the second power module 5 causes the sealing ring 507 to be compressed, thereby achieving sealing at the connection between the two water inlets (the third water inlet 433 and the fourth water inlet 504, the third water outlet 434 and the fourth water outlet 505), thereby preventing the coolant from leaking in the process of flowing into or out of the second cooling channel 500, affecting the heat dissipation effect of the second power module 5, and further affecting the normal operation of the inverter 1.

[0103] refer to Figure 5 , Fig. 9 and Fig.11 In some possible implementations, the front water outlet 430 of the second plate inner water channel 43 and the outlet water channel 204 are sealed and connected through the second rubber tube 7. Exemplarily, the front water outlet 430 and the outlet water channel 204 are spaced apart in the height direction, so the front water outlet 430 and the outlet water channel 204 are connected through the second rubber tube 7, that is, the coolant in the fourth pipeline 432 of the second plate inner water channel 43 flows into the second rubber tube 7 through the front water outlet 430, and then flows into the outlet water channel 204 through the second rubber tube 7.

[0104] Recombination Figure 3 In some possible embodiments, the water outlet channel 204 is provided with a second through hole 207, and the outer periphery of the second rubber tube 7 is convexly provided with a third sealing portion 70 and a fourth sealing portion 71, and the third sealing portion 70 and the inner hole wall of the front end water outlet 430 are interference fit; the fourth sealing portion 71 and the inner hole wall of the second through hole 207 are interference fit.

[0105] Exemplarily, the second rubber tube 7 is in a shape similar to I. The third sealing portion 70 and the fourth sealing portion 71 are respectively located at the upper and lower ends of the outer wall of the second rubber tube 7, and the third sealing portion 70 and the fourth sealing portion 71 both protrude radially from the outer circumference of the second rubber tube 7. Then, the upper end of the second rubber tube 7 is inserted into the front end water outlet 430, and the third sealing portion 70 is radially pressed against the inner hole wall of the front end water outlet 430. The lower end of the second rubber tube 7 is inserted into the second through hole 207 on the water outlet channel 204, and the fourth sealing portion 71 is radially pressed against the inner hole wall of the second through hole 207.

[0106] In this way, on the one hand, the second rubber tube 7 is fixedly connected to the front water outlet 430 and the water outlet channel 204 respectively, so that the second rubber tube 7 can transport the coolant from the front water outlet 430 to the water outlet channel 204. On the other hand, the third sealing part 70 and the fourth sealing part 71 realize the sealed connection between the second rubber tube 7 and the front water outlet 430 and the water outlet channel 204 respectively, so as to avoid leakage of the coolant in the process of flowing from the front water outlet 430 to the water outlet channel 204.

[0107] refer to Figure 5 and Fig.10 In some possible implementations, the main water inlet 410 is sealed and connected to the water inlet channel 203 through the third rubber tube 8. Exemplarily, the main water inlet 410 and the water inlet channel 203 are spaced apart in the height direction, so the main water inlet 410 and the water inlet channel 203 are connected through the third rubber tube 8, so that the coolant in the water inlet channel 203 flows into the third rubber tube 8 through the main water inlet 410, and then flows into the in-board diversion channel 41.

[0108] In some possible embodiments, a fifth sealing portion 80 and a sixth sealing portion 81 are convexly provided on the outer periphery of the third rubber tube 8, and the fifth sealing portion 80 and the inner hole wall of the main water inlet 410 have an interference fit; the sixth sealing portion 81 and the inner hole wall of the water inlet channel 203 have an interference fit.

[0109] Exemplarily, the third rubber tube 8 is in a shape similar to I. The fifth sealing portion 80 and the sixth sealing portion 81 are respectively located at the upper and lower ends of the outer wall of the third rubber tube 8, and the fifth sealing portion 80 and the sixth sealing portion 81 both protrude radially from the outer circumference of the third rubber tube 8. Then, the upper end of the third rubber tube 8 is inserted into the main water inlet 410, and the fifth sealing portion 80 is radially pressed against the inner hole wall of the main water inlet 410. The lower end of the third rubber tube 8 is inserted into the water inlet channel 203, and the sixth sealing portion 81 is radially pressed against the inner hole wall of the water inlet channel 203.

[0110] In this way, on the one hand, the third rubber tube 8 is fixedly connected to the main water inlet 410 and the water inlet channel 203 respectively, so that the third rubber tube 8 can transport the coolant from the water inlet channel 203 to the main water inlet 410. On the other hand, the fifth sealing part 80 and the sixth sealing part 81 realize the sealed connection between the third rubber tube 8 and the main water inlet 410 and the water inlet channel 203 respectively, so as to avoid leakage of the coolant in the process of flowing from the water inlet channel 203 to the main water inlet 410.

[0111] The utility model also discloses a car, comprising a whole car cooling system and the inverter, wherein the whole car cooling system is connected to the inverter.

[0112] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An inverter, characterized in that: include: A shell, wherein a water inlet and a water outlet are arranged on the outer wall of the shell; the shell comprises an inner cavity, wherein a water inlet channel and a water outlet channel are arranged in the inner cavity, wherein the water inlet channel is connected to the water inlet, and the water outlet channel is connected to the water outlet; A first power module, fixedly mounted in the inner cavity, wherein the first power module comprises a first cooling channel; A second power module is spaced apart from the first power module in a height direction, and the second power module includes a second cooling channel; A water-cooling plate, wherein the water-cooling plate is located between the first power module and the second power module along the height direction; the water-cooling plate comprises an inner-plate water channel, wherein the inner-plate water channel is respectively connected to the first cooling channel and the second cooling channel; and the inner-plate water channel is connected to the water inlet channel and the water outlet channel; The coolant can enter the water channel inside the plate from the water inlet channel, a part of the coolant in the water channel inside the plate enters the first cooling channel, then flows back to the water channel inside the plate, and then flows into the water outlet channel; another part of the coolant in the water channel inside the plate enters the second cooling channel, then flows back to the water channel inside the plate, and then flows into the water outlet channel.

2. The inverter according to claim 1, characterized in that: The in-plate water channel includes an in-plate diversion water channel, a first in-plate water channel, and a second in-plate water channel. The in-plate diversion water channel is connected to the water inlet channel and simultaneously connects the first in-plate water channel and the second in-plate water channel; the first in-plate water channel is connected to both ends of the first cooling channel; the second in-plate water channel is connected to both ends of the second cooling channel; the first in-plate water channel includes a rear end water outlet, and the second in-plate water channel includes a front end water outlet, and the front end water outlet and the rear end water outlet are respectively connected to the water outlet water channel.

3. The inverter according to claim 2, characterized in that: The in-board diversion water channel comprises a main water inlet and a middle diversion port which are connected to each other. The main water inlet is connected to the water inlet water channel; the middle diversion port is connected to the first in-board water channel and the second in-board water channel respectively.

4. The inverter according to claim 3, characterized in that: The first plate inner water channel comprises a first pipeline and a second pipeline, the first pipeline being connected to the middle diversion port; The second pipeline is connected to the rear end water outlet; and both ends of the first cooling channel of the first power module are connected to the first pipeline and the second pipeline respectively.

5. The inverter according to claim 4, characterized in that: A first water inlet and a first water outlet are provided on the lower surface of the water-cooling plate, the first water inlet is connected to the first pipeline, and the first water outlet is connected to the second pipeline; a second water inlet and a second water outlet are provided at both ends of the first cooling channel respectively; the first water inlet and the second water inlet are sealed and connected; the first water outlet and the second water outlet are sealed and connected.

6. The inverter according to claim 5, characterized in that: The first water inlet and the first water outlet are both surrounded by sealing grooves, the sealing grooves are used to embed sealing rings, and the lower surface of the water cooling plate and the upper surface of the first power module are at least partially in contact with each other to squeeze the sealing ring.

7. The inverter according to claim 2, characterized in that: The rear end water outlet of the first plate inner water channel and the water outlet water channel are sealed and connected through a first rubber tube.

8. The inverter according to claim 7, characterized in that: The water outlet channel is provided with a first through hole, and the outer periphery of the first rubber tube is convexly provided with a first sealing portion and a second sealing portion, the first sealing portion and the inner hole wall of the rear end water outlet are interference fit; the second sealing portion and the inner hole wall of the first through hole are interference fit.

9. The inverter according to claim 3, characterized in that: The second plate water channel includes a third pipeline and a fourth pipeline, the third pipeline is connected to the middle diversion port; the fourth pipeline is connected to the front water outlet; the two ends of the second cooling channel of the second power module are connected to the third pipeline and the fourth pipeline respectively.

10. The inverter according to claim 9, characterized in that: A third water inlet and a third water outlet are provided on the upper surface of the water-cooling plate, the third water inlet is connected to the third pipeline, and the third water outlet is connected to the fourth pipeline; a fourth water inlet and a fourth water outlet are provided at both ends of the second cooling channel respectively; the third water inlet and the fourth water inlet are sealed and connected; the third water outlet and the fourth water outlet are sealed and connected.

11. The inverter according to claim 10, characterized in that: The third water inlet and the third water outlet are both surrounded by sealing grooves, the sealing grooves are used to embed sealing rings, and the upper surface of the water cooling plate and the lower surface of the second power module are at least partially in contact with each other to squeeze the sealing ring.

12. The inverter according to claim 9, characterized in that: The front water outlet of the second plate inner water channel and the water outlet water channel are sealed and connected via a second rubber tube.

13. The inverter according to claim 12, characterized in that: The water outlet channel is provided with a second through hole, and the outer periphery of the second rubber tube is convexly provided with a third sealing part and a fourth sealing part, the third sealing part and the inner hole wall of the front end water outlet are interference fit; the fourth sealing part and the inner hole wall of the second through hole are interference fit.

14. The inverter according to claim 3, characterized in that: The main water inlet is sealed and connected to the water inlet channel through a third rubber tube.

15. The inverter according to claim 14, characterized in that: The outer periphery of the third rubber tube is convexly provided with a fifth sealing part and a sixth sealing part. The fifth sealing part and the inner hole wall of the main water inlet are interference fit; the sixth sealing part and the inner hole wall of the water inlet channel are interference fit.

16. A car, characterized in that: include: A whole vehicle cooling system and the inverter according to any one of claims 1 to 15, wherein the whole vehicle cooling system is connected to the inverter.

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