Motor controller, electric driving system and vehicle

Abstract

The invention relates to a motor controller, an electric driving system and a vehicle, relates to the technical field of new energy vehicles, and is used for solving the problem that a cooling device of an existing motor controller is poor in cooling effect on a power chip. The motor controller comprises a bottom shell and a protection assembly. A first cavity with an opening is formed in the bottom shell, and a first inlet and a first outlet which are communicated with the first cavity are formed in the bottom shell. The protection assembly covers the opening of the first cavity. A second cavity is formed in the protection assembly, and a second inlet and a second outlet which communicate with the second cavity are formed in the protection assembly. The motor controller is used for converting direct current provided by the battery into alternating current needed by the motor or converting the alternating current generated by the motor into direct current to be stored in the battery in the braking energy recovery process.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and in particular to a motor controller, an electric drive system and a vehicle. Background Art

[0002] During the operation of the motor controller, the power chip is constantly turned on and off, generating a lot of heat. In order to ensure the normal operation of the power module, the motor controller usually has a heat dissipation structure to dissipate the heat generated by the power chip during operation.

[0003] The invention patent with the patent number "EP4276897A1" discloses a power module cooling device. The patent adopts the current mainstream double-sided heat dissipation method of power modules. After the coolant flows from left to right along the upper water channel to cool the upper surface of the power module, it flows into the bottom water channel along the guide port (serial number 32), and the coolant flows from right to left to cool the lower surface of the power module, completing the cooling of the entire power module. When the device cools the power chip, the coolant flow path is a series flow throughout the process, and the chip temperature is more uniform.

[0004] The utility model patent with the patent number "CN217468410U" discloses an oil-cooled power module, in which a heat dissipation substrate is provided on one side of the power chip through a solder layer, and an oil filler is provided on the other side. The copper plate and the outer side of the bottom of the shell are respectively connected with an upper waterway and a lower waterway. The oil filler can fill the entire area of ​​the shell except the heat dissipation substrate, the solder layer, and the power chip, so that the heat can be directly dissipated in multiple directions and evenly. At the same time, the heat generated by the power chip is dissipated by the upper waterway or the lower waterway, and the heat dissipation effect is better. In the process of heat dissipation of the device, the heat dissipated by the power chip needs to be transferred to the oil filler first, and then transferred to the cooling medium in the waterway by the oil filler. The cooling medium cannot directly contact the power chip, the heat dissipation path is long, and the heat dissipation effect of the power chip is poor.

[0005] In summary, the cooling effect of the existing motor controller cooling device on the power chip is relatively poor. Summary of the invention

[0006] One of the purposes of the present invention is to provide a motor controller to solve the problem that the cooling device of the existing power module has a poor cooling effect on the power chip. The second purpose of the present invention is to provide an electric drive system. The third purpose of the present invention is to provide a vehicle.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] On the one hand, an embodiment of the present application provides a motor controller, including a bottom shell and a protective assembly. The bottom shell forms a first chamber with an opening, and is provided with a first inlet and a first outlet connected to the first chamber. The protective assembly cover is arranged at the opening of the first chamber. A second chamber is formed inside the protective assembly, and is provided with a second inlet and a second outlet connected to the second chamber.

[0009] According to the above technical means, in the process of actual application, the first inlet and the first outlet can be connected to the cooling circuit. In this way, the cooling medium in the cooling circuit can enter the first chamber from the first inlet and leave the first chamber from the first inlet. The cooling medium can take away part of the heat in the process of flowing through the first chamber, thereby forming a first heat dissipation channel in the first chamber. The second inlet and the second outlet can also be connected to the cooling device, so that a second heat dissipation channel can be formed inside the second chamber. In this way, the cooling medium of the cooling device can flow through the first chamber and the second chamber at the same time, the first chamber can dissipate the heat of the power chip from the bottom of the power chip, and the second chamber can dissipate the heat of the power chip from the top and all around the power chip, thereby effectively ensuring the dissipation effect of the heat generated by the power chip.

[0010] In a possible implementation, the protection assembly includes a protection bottom plate. The protection bottom plate is arranged opposite to the opening of the first chamber and covers the opening of the first chamber. The protection bottom plate is provided with a second inlet and a second outlet.

[0011] According to the above technical means, the protective bottom plate can cover the opening of the first chamber to prevent the cooling oil entering the first chamber from flowing to the outside through the opening of the first chamber. Since the second inlet and the second outlet are both arranged on the protective bottom plate, in the actual application process, the second inlet and the second outlet can connect the first chamber and the second chamber. In this way, the cooling oil can enter the second chamber from the second inlet after entering the first chamber, and the cooling oil in the second chamber can return to the first chamber from the second outlet, and the second inlet and the second outlet do not need separate external pipes.

[0012] In a possible implementation, along the first direction, the first inlet and the first outlet are spaced apart, and the second inlet and the second outlet are spaced apart, wherein the second inlet is located on a side of the second outlet close to the first inlet along the first direction.

[0013] According to the above technical means, the arrangement direction of the second inlet and the second inlet is consistent with the arrangement direction of the first inlet and the first outlet. In this way, when the cooling medium is cooling oil, the flow direction of the cooling oil in the first chamber and the second chamber is consistent, and the cooling medium in the first chamber and the second chamber can cool down both sides of the power chip synchronously.

[0014] In a possible embodiment, the bottom shell includes a bottom shell wall and a bottom shell side wall. A first inlet and a first outlet are provided on the bottom shell wall. The bottom shell side wall is located on a side of the bottom shell wall close to the protective component and is arranged around the bottom shell wall; a side of the bottom shell side wall away from the bottom shell wall forms an opening of the first chamber. The first inlet and the second inlet are arranged opposite to each other, and the first outlet and the second outlet are arranged opposite to each other.

[0015] According to the above technical means, the bottom wall of the bottom shell can provide a location for the first inlet and the first outlet. At the same time, when the first inlet and the first outlet are arranged on the bottom wall of the bottom shell, when the cooling oil enters the first chamber through the first inlet, its flow direction is toward the direction where the second chamber is located, so that the cooling oil can enter the second chamber from the second inlet.

[0016] In a possible implementation, a plurality of installation spaces having inlets and outlets are formed inside the second chamber. The second chamber is further formed with first flow channels respectively connected to the inlets of the plurality of installation spaces, and second flow channels respectively connected to the outlets of the plurality of installation spaces. The first flow channel is connected to the second inlet, and the second flow channel is connected to the second outlet.

[0017] According to the above technical means, in the process of actual application, multiple power chips can be respectively arranged in different installation spaces, and since the installation hole has an inlet and an outlet, cooling oil can pass through the installation space, thereby dissipating heat for the power chips arranged in the installation space. The multiple installation spaces are in a parallel relationship on the flow path of the cooling oil, and the temperature of the cooling oil flowing through the multiple installation spaces is the same, thereby ensuring that the cooling oil flowing through the second chamber has the same cooling effect on the power chips in the multiple installation spaces.

[0018] In a possible embodiment, the protective assembly includes a protective bottom plate and a protective side plate. The protective bottom plate is arranged opposite to the opening of the first chamber and covers the opening of the first chamber. The protective side plate is located on the side of the protective bottom plate away from the bottom shell and is arranged around the protective bottom plate. A plurality of partition plates are arranged between the protective bottom plate and the upper portion. The plurality of partition plates are arranged opposite to each other at intervals along the arrangement direction of the second inlet and the second outlet, and an installation space is formed between two adjacent partition plates. Along the extension direction of the partition plates, the first flow channel and the second flow channel are formed on both sides of the plurality of partition plates, respectively. One end of the partition plate close to the second inlet and close to the second flow channel abuts against the protective side plate.

[0019] According to the above technical means, the protective side plate and the protective bottom plate can enclose a second chamber. Multiple partitions can divide the space in the second chamber into multiple installation spaces and a first flow channel and a second flow channel. Multiple partitions can guide the flow direction of the cooling oil entering the first chamber so that the cooling oil entering the second chamber can flow in the direction of the first flow channel, multiple installation spaces, and the second flow channel. In this way, the power chip located in the installation space can be cooled down during the cooling oil flowing in the second chamber. The partition plate close to the second inlet can separate an end of the first flow channel close to the second inlet from an end of the second flow channel close to the second inlet, thereby preventing the cooling oil from entering the first flow channel from the second inlet and directly entering the second flow channel.

[0020] In a possible implementation manner, an end of the partition plate close to the second outlet and close to the first flow channel abuts against the protective side plate.

[0021] According to the above technical means, the partition plate can separate the end of the first flow channel close to the second outlet from the end of the second flow channel close to the second outlet, thereby avoiding the first flow channel and the second flow channel from being connected to each other at the end close to the second outlet, so that the cooling oil entering the first flow channel will flow through the installation space.

[0022] In a possible embodiment, the protective assembly includes a protective bottom plate and a protective side plate. The protective bottom plate is arranged opposite to the opening of the first chamber and covers the opening of the first chamber. The protective side plate is located on the side of the protective bottom plate away from the bottom shell and is arranged around the protective bottom plate. A plurality of partition plates are arranged at intervals on the protective bottom plate. Along the second direction, the plurality of partition plates are arranged at intervals, and an installation space is formed between two adjacent partition plates. The second direction is perpendicular to the arrangement direction of the second inlet and the second outlet. Along the extension direction of the partition plates, the first flow channel and the second flow channel are formed on both sides of the plurality of partition plates, respectively.

[0023] According to the above technical means, multiple partition plates and multiple installation spaces can also separate the first flow channel from the second flow channel. In this case, after the cooling oil enters the first flow channel from the second inlet, it also needs to pass through multiple installation spaces before entering the second flow channel.

[0024] In a possible implementation, the protection assembly further includes a top cover and a first sealing ring. The top cover is disposed on a side of the protection side plate away from the protection bottom plate. A second sealing groove is formed on a side of the protection side plate close to the top cover, and the first sealing ring is located in the second sealing groove.

[0025] According to the above technical means, the top cover can seal the opening at the top of the second chamber, thereby protecting the power chip located inside the second chamber. The first sealing ring can also improve the sealing between the top cover and the protective side plate, thereby preventing cooling oil from leaking from the second chamber.

[0026] In a possible implementation, a plurality of spoiler columns are formed in the first chamber, and the plurality of spoiler columns are located between the first inlet and the first outlet.

[0027] According to the above technical means, the spoiler column can change the flow path of the cooling oil, so that the cooling oil passes through the first chamber more smoothly, thereby reducing the generation of vortices in the first chamber.

[0028] On the other hand, the present application also provides an electric drive system, including the above-mentioned motor controller, which is used to convert the DC power provided by the battery into the AC power required by the motor, or to convert the AC power generated by the motor back into DC power and store it in the battery during braking energy recovery.

[0029] On the other hand, the present application also provides a vehicle, including the above-mentioned electric drive system, which is responsible for converting electrical energy into mechanical energy to drive the vehicle.

[0030] Since the electric drive system and vehicle provided in the embodiments of the present application include the motor controller in the first aspect, they can solve the same technical problems as the above-mentioned motor controller and achieve the same technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0032] Figure 1 This is one of the schematic diagrams of the connection method between the power module and the water cooling base plate in the related art;

[0033] Figure 2 The second schematic diagram of the connection method between the power module and the water cooling base plate in the related art;

[0034] Figure 3 One of the partial structural schematic diagrams of the motor controller provided in the embodiment of the present application;

[0035] Figure 4 The second partial structural diagram of the motor controller provided in the embodiment of the present application;

[0036] Figure 5 The third partial structural diagram of the motor controller provided in the embodiment of the present application;

[0037] Figure 6 A fourth partial structural diagram of a motor controller provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram of the structure of the protection component provided in the embodiment of the present application;

[0039] Figure 8 A fifth partial structural diagram of a motor controller provided in an embodiment of the present application;

[0040] Fig. 9 The sixth partial structural diagram of the motor controller provided in the embodiment of the present application;

[0041] Fig.10 One of the partial schematic diagrams of the use state of the motor controller is provided for the embodiment of the present application;

[0042] Fig.11 A second partial schematic diagram of the use status of the motor controller is provided for the embodiment of the present application.

[0043] Reference numerals

[0044] 200-power module; 210-chip; 220-first copper plate; 230-ceramic substrate; 240-second copper plate; 300-water cooling base plate; 310-power module bracket; 100-motor controller; 1-bottom shell; 11-first chamber; 111-first inlet; 112-first outlet; 12-bottom shell bottom wall; 13-bottom shell side wall; 2-protective component; 21-second chamber; 211-second inlet; 212-second outlet; 213-installation space ; 214-first flow channel; 215-second flow channel; 22-protective bottom plate; 221-installation perforation; 222-side panel installation hole; 23-protective side panel; 232-locating pin; 24-partitioning plate; 241-first partition; 242-second partition; 25-top cover; 251-through hole; 26-first sealing ring; 27-second sealing ring; 28-screw; 3-spoiler column; 4-three-phase copper busbar; 5-DC positive and negative copper busbar; 6-power chip signal pin. DETAILED DESCRIPTION

[0045] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0047] In the related art, the motor controller of a new energy vehicle usually includes a power module, and the power module is provided with a power chip. During operation, the power chip is continuously turned on and off, generating a large amount of heat.

[0048] like Figure 1 As shown, Figure 1 This is one of the schematic diagrams of the connection method between the power module 200 and the water-cooled base plate 300 in the related art. The power module 200 may include a chip 210, a first copper plate 220, a ceramic substrate 230, and a second copper plate 240. The second copper plate 240 is welded to the water-cooled base plate 300 through a welding layer, the ceramic substrate 230 is connected to the side of the second copper plate 240 away from the water-cooled base plate 300, and the first copper plate 220 is connected to the side of the ceramic substrate 230 away from the second copper plate 240. The chip 210 is welded to the side of the first copper plate 220 away from the ceramic substrate 230.

[0049] The heat generated by the chip 210 is transferred to the water-cooled base plate 300 through the first copper plate 220, the ceramic substrate 230 and the second copper plate 240 in sequence, and is taken away by the water flowing through the water-cooled base plate 300. The heat dissipation path of the chip 210 is long, which is not conducive to the heat dissipation to the outside.

[0050] like Figure 2 As shown, Figure 2 This is a second schematic diagram of the connection method between the power module 200 and the water-cooling base plate 300 in the related art. A power module bracket 310 may also be provided on the water-cooling base plate 300. Figure 2 In the left and right directions, the power module bracket 310 is relatively arranged on both sides of the power module 200. The power module bracket 310 can support the three AC copper bars and the DC positive and negative copper bars. In the actual application process, the power module bracket 310 will block the two sides of the chip 210, which is not convenient for the heat of the chip 210 to dissipate outward.

[0051] Based on this, an embodiment of the present application provides a vehicle. The vehicle may include a vehicle body and an electric drive system.

[0052] The electric drive system is the core power system of new energy vehicles (such as electric vehicles, plug-in hybrid vehicles, etc.), responsible for converting electrical energy into mechanical energy to drive the vehicle.

[0053] It is understandable that the vehicle provided in the embodiment of the present application may also include other components, such as an engine, a transmission mechanism, etc., to realize the basic functions of the vehicle.

[0054] The electric drive system provided in the embodiment of the present application may include a motor controller, which is used to control and adjust the operation of the motor to achieve the conversion between electrical energy and mechanical energy. The motor controller can convert the direct current provided by the battery into the alternating current required by the motor, or convert the alternating current generated by the motor back to direct current and store it in the battery during the braking energy recovery process.

[0055] It is understandable that the electric drive system provided in the embodiment of the present application may also include a drive motor and a reducer, etc., to achieve the function of providing power for the vehicle.

[0056] The motor controller provided in the embodiment of the present application is further described below. Figure 3 As shown, Figure 3 The motor controller 100 provided in the embodiment of the present application is one of the partial structural diagrams. The motor controller 100 may include a bottom shell 1. The bottom shell 1 forms a first chamber 11 with an opening, and is provided with a first inlet 111 and a first outlet 112 communicating with the first chamber 11.

[0057] In actual application, the first inlet 111 and the first outlet 112 may be connected to a cooling circuit. In this way, the cooling medium in the cooling circuit may enter the first chamber 11 from the first inlet 111 and leave the first chamber 11 from the first outlet 112. The cooling medium may take away a portion of the heat while flowing through the first chamber 11, thereby forming a first heat dissipation channel in the first chamber 11.

[0058] In some embodiments, Figure 4 As shown, Figure 4 The second partial structural diagram of the motor controller 100 provided in the embodiment of the present application, the motor controller 100 may further include a protection component 2, the protection component 2 is covered in the first chamber 11 ( Figure 3 In this way, the protection component 2 can seal the opening of the first chamber 11 to prevent the cooling medium entering the first chamber 11 from escaping to the outside.

[0059] The protection component 2 has a second chamber 21 formed inside, and has a second inlet 211 and a second outlet 212 communicating with the second chamber 21. In actual application, the power chip can be arranged on the bottom wall of the second chamber 21, and the second chamber 21 can protect the power chip.

[0060] It is understandable that, in actual application, the second inlet 211 and the second outlet 212 can also be connected to the cooling device, so that a second heat dissipation channel can be formed inside the second chamber 21. In this way, the cooling medium of the cooling device can flow through the first chamber 11 and the second chamber 21 at the same time, the first chamber 11 can dissipate the heat of the power chip from the bottom of the power chip, and the second chamber 21 can dissipate the heat of the power chip from the top and surroundings of the power chip, thereby effectively ensuring the dissipation effect of the heat generated by the power chip.

[0061] It should be noted that the first heat dissipation channel in the first chamber 11 and the second heat dissipation channel in the second chamber 21 are in a parallel relationship. In this way, it can be ensured that the cooling medium entering the first heat dissipation channel in the first chamber 11 and the second heat dissipation channel in the second chamber 21 are at the same temperature and have the same effect on heat dissipation, thereby evenly taking away the heat from different positions of the power chip, so that the temperature of different positions of the cooling chip is uniform.

[0062] It is understandable that in some embodiments, the cooling device may be an oil cooling device, which uses cooling oil as a cooling medium. The cooling oil can achieve heat exchange when flowing through the first chamber 11 and the second chamber 21, thereby taking away the heat generated by the power chip. It should be noted that how the oil cooling device drives the cooling oil circulation and how to cool the cooling oil are conventional technical means for those skilled in the art, so it will not be described in detail in this application.

[0063] In order to prevent the cooling oil from affecting the normal operation of the cooling chip after contacting the cooling chip, in actual application, the cooling oil can be insulating cooling oil, so that the cooling oil will not affect the normal operation of the power chip after directly contacting the power chip.

[0064] In some embodiments, Figure 4 As shown, the protection assembly 2 may include a protection bottom plate 22, and the protection bottom plate 22 and the first chamber 11 ( Figure 3 ) is arranged opposite to the opening of the first chamber 11 and covers the opening of the first chamber 11, and a second inlet 211 and a second outlet 212 are provided on the protective bottom plate 22. In this way, the protective bottom plate 22 can cover the opening of the first chamber 11 to prevent the cooling oil entering the first chamber 11 from flowing to the outside through the opening of the first chamber 11.

[0065] At the same time, since the second inlet 211 and the second outlet 212 are both disposed on the protective bottom plate 22, in actual application, the second inlet 211 and the second outlet 212 can Figure 3) is connected to the second chamber 21. In this way, the cooling oil can enter the second chamber 21 from the second inlet 211 after entering the first chamber 11, and the cooling oil in the second chamber 21 can return to the first chamber 11 from the second outlet 212, and the second inlet 211 and the second outlet 212 do not need separate external pipes.

[0066] In actual application, the protective bottom plate 22 can be made of copper material. In this way, the protective bottom plate 22 has a better heat conduction effect, which facilitates the heat of the power chip to be dissipated outward from the protective bottom plate 22.

[0067] In some embodiments, Figure 3 and Figure 4 As shown, along the first direction X, the first inlet 111 and the first outlet 112 are arranged at intervals, and along the first direction X, the second inlet 211 and the second outlet 212 are arranged at intervals. In this way, the arrangement direction of the second inlet 211 and the second outlet 212 is consistent with the arrangement direction of the first inlet 111 and the first outlet 112. In this way, when the cooling medium is cooling oil, the flow direction of the cooling oil in the first chamber 11 and the second chamber 21 is consistent, and the cooling medium in the first chamber 11 and the second chamber 21 can cool down both sides of the power chip synchronously.

[0068] In some embodiments, the second inlet 211 is located on a side of the second outlet 212 close to the first inlet 111 along the first direction X. In this way, the cooling oil can enter the second chamber 21 from the second inlet 211 and return to the first chamber 11 from the second outlet 212 .

[0069] To form the first chamber 11, in some embodiments, as Figure 3 As shown, the bottom shell 1 may include a bottom shell wall 12 and a bottom shell side wall 13. The bottom shell wall 12 is provided with a first inlet 111 and a first outlet 112. In this way, the bottom shell wall 12 can provide a location for the first inlet 111 and the first outlet 112. At the same time, when the first inlet 111 and the first outlet 112 are provided on the bottom shell wall 12, when the cooling oil enters the first chamber 11 through the first inlet 111, its flow direction is toward the second chamber 21 ( Figure 4 ) direction, so that the cooling oil can flow from the second inlet 211 ( Figure 4 ) enters the second chamber 21 ( Figure 4 ).

[0070] It is understood that in some embodiments, the first inlet 111 and the second inlet 211 may be arranged opposite to each other. In this way, after the cooling oil enters the first chamber 11 from the first inlet 111 driven by the circulation device, the cooling oil easily enters the second chamber 21 from the second inlet 211 under the action of inertia.

[0071] Accordingly, the first outlet 112 can be connected to the second outlet 212 ( Figure 4 In this way, after the cooling oil re-enters the first chamber 11 from the second outlet 212, the cooling oil is easily discharged from the first outlet 112.

[0072] The bottom shell side wall 13 is located on a side of the bottom shell wall 12 close to the protective assembly 2, and is arranged around the bottom shell wall 12. The side of the bottom shell side wall 13 away from the bottom shell wall 12 forms an opening of the first chamber 11. In this way, the bottom shell side wall 13 and the bottom shell wall 12 can enclose the first chamber 11 with an opening.

[0073] In actual application, a plurality of power chips are usually arranged inside the second chamber 21. In order to dissipate heat for the plurality of power chips simultaneously, in some embodiments, for example Figure 5 As shown, Figure 5 The third partial structural diagram of the motor controller 100 provided in the embodiment of the present application, a plurality of installation spaces 213 with inlets and outlets are formed inside the second chamber 21. In actual application, a plurality of power chips can be respectively arranged in different installation spaces 213. Since the installation space 213 has an inlet and an outlet, cooling oil can pass through the installation space 213, thereby dissipating heat for the power chip arranged in the installation space 213.

[0074] like Figure 4 As shown, the second chamber 21 further includes a first flow channel 214 connected to the inlets of the plurality of installation spaces 213 and a second flow channel 215 connected to the outlets of the plurality of installation spaces. The first flow channel 214 is connected to the second inlet 211, and the second flow channel 215 is connected to the second outlet 212.

[0075] In actual application, the cooling oil enters the second chamber 21 from the second inlet 211 and flows out of the second chamber 21 from the second outlet 212. Therefore, the flow direction of the cooling oil in the second chamber 21 is from the second inlet 211 into the first flow channel 214, from the first flow channel 214 into the plurality of installation spaces 213, and then flows out from the plurality of installation spaces 213 and converges into the second flow channel 215.

[0076] In this way, the multiple installation spaces 213 are in a parallel relationship in the flow path of the cooling oil, and the temperature of the cooling oil flowing through the multiple installation spaces 213 is the same, thereby ensuring that the cooling oil flowing through the second chamber 21 has the same cooling effect on the power chips in the multiple installation spaces 213.

[0077] In some embodiments, Figure 5 As shown, the protection assembly 2 may further include a protection side plate 23. The protection side plate 23 is located at the protection bottom plate 22 away from the bottom shell 1 ( Figure 3) on one side, and is arranged around the protective bottom plate 22. In this way, the protective side plate 23 and the protective bottom plate 22 can enclose the second chamber 21.

[0078] like Figure 4 As shown, a plurality of partition plates 24 are arranged at intervals on the protective bottom plate 22, and the plurality of partition plates 24 are arranged at intervals along the second inlet 211 and the second outlet 212, and an installation space 213 is formed between two adjacent partition plates 24. Along the extension direction of the partition plates 24, the first flow channel 214 and the second flow channel 215 are formed on both sides of the plurality of partition plates 24, respectively.

[0079] In actual application, the plurality of partition plates 24 can divide the space in the second chamber 21 into a plurality of installation spaces 213 and a first flow channel 214 and a second flow channel 215. The plurality of partition plates 24 can guide the flow direction of the cooling oil entering the second chamber 21, so that the cooling oil entering the second chamber 21 can flow in the direction of the first flow channel 214, the plurality of installation spaces 213, and the second flow channel 215. In this way, the cooling oil can cool the power chip located in the installation space 213 while flowing in the second chamber 21.

[0080] Continue to refer to Figure 4 , one end of the partition plate 24 near the second inlet 211 near the second flow channel 215 abuts against the protective side plate 23. In this way, the partition plate 24 near the second inlet 211 can separate one end of the first flow channel 214 near the second inlet 211 from one end of the second flow channel 215 near the second inlet 211, thereby preventing the cooling oil from directly entering the second flow channel 215 after entering the first flow channel 214 from the second inlet 211.

[0081] For example, Figure 4 As shown, the second inlet 211 is located at Figure 4 The first flow channel 214 is located below the second chamber 21, and the second flow channel 215 is located above the second chamber 21. The left side surface of the leftmost partition plate 24 of the plurality of partition plates 24 protrudes to the left to form a first partition portion 241. The first partition portion 241 and the protective side plate 23 are located Figure 4 The first partition 241 is located above the second inlet 211. In this way, the first partition 241 can separate the end of the first flow channel 214 close to the second inlet 211 and the end of the second flow channel 215 close to the second inlet 211 from each other, thereby preventing the cooling oil from entering the first flow channel 214 from the second inlet 211 and then directly entering the second flow channel 215.

[0082] In some embodiments, Figure 4As shown, one end of the partition plate 24 near the second outlet 212 near the first flow channel 214 abuts against the protective side plate 23. In this way, the partition plate 24 can separate one end of the first flow channel 214 near the second outlet 212 from one end of the second flow channel 215 near the second outlet 212, thereby preventing the first flow channel 214 and the second flow channel 215 from being connected to each other at one end near the second outlet 212, so that the cooling oil entering the first flow channel 214 will flow through the installation space 213.

[0083] For example, Figure 4 As shown, the second outlet 212 is located at Figure 4 The first flow channel 214 is located below the second chamber 21, and the second flow channel 215 is located above the second chamber 21. The right side surface of the partition plate 24 located on the rightmost side of the plurality of partition plates 24 is convex to the right to form a second partition portion 242, and the second partition portion 242 and the protective side plate 23 are located Figure 4 The inner wall on the middle right side abuts against the second partition portion 242 , and the second partition portion 242 is located below the second outlet 212 .

[0084] In this way, the second partition 242 can separate and isolate one end of the first flow channel 214 close to the second outlet 212 from one end of the second flow channel 215 close to the second outlet 212. In this way, it can be ensured that the cooling oil needs to pass through the installation space 213 before entering the second flow channel 215 from the first flow channel 214, thereby ensuring that the cooling oil entering the second chamber 21 can cool the power chip.

[0085] In other embodiments, along the second direction, multiple partition plates 24 are arranged at intervals relative to each other, and an installation space 213 can also be formed between two adjacent partition plates 24. The second direction is perpendicular to the arrangement direction of the second inlet 211 and the second outlet 212. Along the extension direction of the multiple partition plates 24, the first flow channel 214 and the second flow channel 215 are formed on both sides of the multiple partition plates 24, respectively. In this way, the multiple partition plates 24 and the multiple installation spaces 213 can also separate the first flow channel 214 from the second flow channel 215. At this time, after the cooling oil enters the first flow channel 214 from the second inlet 211, it also needs to pass through the multiple installation spaces 213 before entering the second flow channel 215.

[0086] In some embodiments, Figure 6 As shown, Figure 6 The fourth partial structural diagram of the motor controller 100 provided in the embodiment of the present application, the protection component 2 may further include a top cover 25, and the top cover 25 is provided on the side of the protection side plate 23 away from the protection bottom plate 22. In this way, the top cover 25 can block the opening at the top of the second chamber 21, thereby protecting the power chip located inside the second chamber 21.

[0087] In actual application, the top cover 25 can be made of PPS plastic. PPS plastic has very high heat resistance, which can prevent the top cover 25 from being deformed due to heat during long-term use. At the same time, the top cover 25 has excellent corrosion resistance to most acids, alkalis, solvents and oils, and is not easily corroded by cooling oil during long-term use.

[0088] In order to ensure the sealing effect between the top cover 25 and the protective side plate 23, in some embodiments, such as Figure 6 As shown, the protection assembly 2 may further include a first sealing ring 26. A first sealing groove may be formed on one side of the top cover 25 close to the protection side plate 23, and the first sealing ring 26 may be located in the first sealing groove. In this way, the first sealing ring 26 may also improve the sealing performance between the top cover 25 and the protection side plate 23, thereby preventing the cooling oil from leaking from the second chamber 21.

[0089] It is understandable that, in other embodiments, a second sealing groove is formed on one side of the protective side plate 23 close to the top cover 25, and the first sealing ring 26 can be located in the second sealing groove. In actual application, the second sealing groove can provide a space for accommodating the first sealing ring 26, and the first sealing ring 26 can improve the sealing between the top cover 25 and the protective side plate 23, thereby preventing the cooling oil from leaking from the second chamber 21.

[0090] In some embodiments, Figure 7 As shown, Figure 7 The schematic diagram of the structure of the protection assembly 2 provided in the embodiment of the present application shows that a plurality of first threaded connection holes are provided on one side of the protection side plate 23 close to the top cover 25, and a through hole may be provided on the top cover 25. In actual application, the protection assembly 2 may further include a screw 28, which passes through the through hole and is threadedly connected to the first threaded connection hole, thereby locking the top cover 25 and the protection side plate 23 together.

[0091] Exemplarily, the number of the first threaded connection holes may be 10, and correspondingly, the number of the screws 28 may be 10, and the 10 screws 28 may be M3*10 cross recessed pan head self-tapping screws.

[0092] In some embodiments, Figure 6 As shown, the protection assembly 2 may further include a second sealing ring 27, which is disposed between the protection bottom plate 22 and the protection side plate 23. In actual application, the second sealing ring 27 may ensure a sealing effect between the protection bottom plate 22 and the protection side plate 23.

[0093] Exemplarily, the first sealing ring 26 and the second sealing ring 27 may be nitrile rubber sealing rings, which have excellent oil resistance and solvent resistance and are less likely to leak after being in contact with cooling oil for a long time.

[0094] It is understandable that a bottom positioning pin (not shown) may be provided on one side of the protective side plate 23 close to the protective bottom plate 22, and the bottom positioning pin may be distributed along a diagonal line. Accordingly, a bottom plate guide hole may be formed on the protective bottom plate 22, and the top positioning pin and the bottom plate guide hole cooperate with each other to ensure the position accuracy between the protective bottom plate 22 and the protective side plate 23.

[0095] like Figure 8 As shown, Figure 8 In the fifth partial structural diagram of the motor controller 100 provided in the embodiment of the present application, the protective bottom plate 22 may be provided with a side plate mounting hole 222. Accordingly, a threaded connection hole may be provided on the side of the protective side plate 23 close to the protective bottom plate 22. In actual application, the connector may pass through the side plate mounting hole 222 and be threadedly connected in the threaded connection hole, thereby connecting the protective side plate 23 to the protective bottom plate 22.

[0096] For example, there can be six side plate mounting holes 222, and accordingly, the number of the connecting pieces can also be six. In practical applications, the connecting piece can be a hexagon socket head screw with a size of M5*12.

[0097] In order to increase the flow rate of the cooling oil in the first chamber 11, in some embodiments, as Fig. 9 As shown, Fig. 9 The sixth partial structural diagram of the motor controller 100 provided in the embodiment of the present application, a plurality of spoiler columns 3 may be formed in the first chamber 11, and the plurality of spoiler columns 3 are located at the first inlet 111 ( Figure 3 ) and the first outlet 112 ( Figure 3 ). In actual application, when the cooling oil flows through the spoiler column 3, the spoiler column 3 can change the flow path of the cooling oil, so that the cooling oil passes through the first chamber 11 ( Figure 3 ), thereby reducing the generation of eddy currents in the first chamber 11.

[0098] In some embodiments, Fig. 9 As shown, one end of the spoiler column 3 can be connected to the protective bottom plate 22. In this way, the heat of the power chip can be transferred to the spoiler column 3 through the protective bottom plate 22, and the spoiler column 3 can increase the heat dissipation area to facilitate the heat dissipation at the bottom of the power chip.

[0099] like Figure 5 As shown, two positioning pins 232 may be provided on one side of the protective side plate 23 close to the top cover 25. The two positioning pins 232 may be arranged diagonally. Accordingly, a positioning hole (not shown) may be provided on one side of the top cover 25 close to the protective side plate 23, and the positioning pins 232 may be inserted into the positioning hole on the top cover 25, thereby positioning the relative position between the top cover 25 and the protective side plate 23.

[0100] In the actual application process, Fig.10 As shown, Fig.10 One of the partial schematic diagrams of the use state of the motor controller 100 is provided for the embodiment of the present application. The power chip of the motor controller 100 is usually equipped with a power chip signal pin 6. A through hole 251 is opened on the top cover 25. The power chip signal pin 6 is passed through the through hole 251. One end of the power chip signal pin 6 is located in the second chamber 21 ( Figure 5 ) and the other end extends to the outside of the second chamber 21. Through the guidance of the positioning pin 232, the power chip signal pin 6 can smoothly pass through the through hole on the top cover 25.

[0101] In order to ensure the sealing effect of the top cover 25, Fig.10 As shown, after the power chip signal pin 6 passes through the through hole 251 of the upper cover 25, a sealant with insulating properties can be filled between the power chip signal pin and the side wall of the through hole, thereby sealing the through hole.

[0102] In some embodiments, Figure 5 As shown, the protective bottom plate 22 may be provided with a plurality of mounting through holes 221. Correspondingly, the bottom shell 1 may be provided with mounting threaded holes adapted thereto. Fig.10 As shown, Fig.10 In the seventh partial structural diagram of the motor controller 100 provided in the embodiment of the present application, the connecting screw passes through the mounting through hole 221 and is threadedly connected with the mounting threaded hole on the bottom shell 1, thereby locking the protective bottom plate 22 and the bottom shell 1 together.

[0103] It is understandable that in actual application, the number of the mounting through holes 221 and the mounting threaded holes can be eight, and accordingly, the number of the connecting screws can also be eight. The connecting screws can be hexagonal pan head screws with a specification of M4*14.

[0104] In order to facilitate locking the protective bottom plate 22 and the bottom shell 1 together, in some embodiments, such as Fig.10 As shown, a relief portion may be formed on the protective side plate 23, and the relief portion is arranged opposite to the installation through hole 221. Along a direction perpendicular to the bottom shell 1, a locking tool may pass through the relief portion to perform a locking operation.

[0105] In order to achieve external circuit connection, in some embodiments, such as Fig.11 As shown, Fig.11 The second partial schematic diagram of the use state of the motor controller 100 is provided for the embodiment of the present application. The motor controller 100 may further include a three-phase copper busbar 4 and a DC positive and negative copper busbar 5. Fig.11In the up and down direction, the three-phase copper bar 4 and the DC positive and negative copper bars 5 are relatively arranged on both sides of the protective side plate 23. The DC positive and negative copper bars 5 can receive the DC current transmitted by the battery and transmit the current to the power chip. The power chip adjusts the DC current to AC current and supplies it to the motor through the three-phase copper bar 4 to drive the motor to operate.

[0106] For example, Fig.11 As shown, the protective side plate 23 can also be made of PPS plastic. During the manufacturing process, the protective side plate 23 can be molded together with the three-phase copper busbar 4 and the DC positive and negative copper busbars 5 to form a whole, thereby fixing the three-phase copper busbar 4 and the DC positive and negative copper busbars 5 on the protective side plate 23.

[0107] In actual application, the number of three-phase copper bars 4 can be three, and the staff can use three M5*12 hexagon socket pan head screws to connect the three three-phase copper bars 4 to the circuit connectors provided on the bottom shell 1. There can be six DC positive and negative copper bars 5, two of which form a group to form positive and negative poles, and the staff can use six M5*12 hexagon socket pan head screws to connect the six DC positive and negative copper bars 5 to the circuit connectors provided on the bottom shell 1. In this way, the reliability of the electrical connection of the three-phase copper bars 4 and the DC positive and negative copper bars 5 can be ensured.

[0108] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A motor controller, characterized in that: The motor controller (100) comprises: A bottom shell (1), the bottom shell (1) forms a first chamber (11) with an opening, and is provided with a first inlet (111) and a first outlet (112) communicating with the first chamber (11); and A protective component (2) is covered at the opening of the first chamber (11); a second chamber (21) is formed inside the protective component (2), and a second inlet (211) and a second outlet (212) communicating with the second chamber are provided.

2. The motor controller according to claim 1, characterized in that: The protective assembly (2) comprises a protective bottom plate (22); the protective bottom plate (22) is arranged opposite to the opening of the first chamber (11) and covers the opening of the first chamber (11); wherein the second inlet (211) and the second outlet (212) are provided on the protective bottom plate (22).

3. The motor controller according to claim 2, characterized in that: Along a first direction, the first inlet (111) and the first outlet (112) are arranged at intervals, and the second inlet (211) and the second outlet (212) are arranged at intervals; wherein the second inlet (211) is located on a side of the second outlet (212) close to the first inlet (111) along the first direction.

4. The motor controller according to claim 3, characterized in that: The bottom shell (1) comprises: a bottom wall (12) of the bottom shell, wherein the first inlet (111) and the first outlet (112) are formed on the bottom wall (12) of the bottom shell; and A bottom shell side wall (13) is located on a side of the bottom shell wall (12) close to the protective assembly (2) and is arranged around the bottom shell wall (12); a side of the bottom shell side wall (13) away from the bottom shell wall (12) forms an opening of the first chamber (11); The first inlet (111) and the second inlet (211) are arranged opposite to each other, and the first outlet (112) and the second outlet (212) are arranged opposite to each other.

5. The motor controller according to claim 1, characterized in that: A plurality of installation spaces (213) having inlets and outlets are formed inside the second chamber (21); the second chamber (21) also has first flow channels (214) respectively connected to the inlets of the plurality of installation spaces (213), and second flow channels (215) respectively connected to the outlets of the plurality of installation spaces; The first flow channel (214) is in communication with the second inlet (211), and the second flow channel (215) is in communication with the second outlet (212).

6. The motor controller according to claim 5, characterized in that: The protection assembly (2) comprises a protection bottom plate (22) and a protection side plate (23); the protection bottom plate (22) is arranged opposite to the opening of the first chamber (11) and covers the opening of the first chamber (11); the protection side plate (23) is located on a side of the protection bottom plate (22) away from the bottom shell (1) and is arranged around the protection bottom plate (22); A plurality of partition plates (24) are arranged at intervals on the protective bottom plate (22); the plurality of partition plates (24) are arranged at intervals and relative to each other along the arrangement direction of the second inlet (211) and the second outlet (212), and the installation space (213) is formed between two adjacent partition plates (24); along the extension direction of the partition plates (24), the first flow channel (214) and the second flow channel (215) are respectively formed on both sides of the plurality of partition plates (24); Wherein, one end of the partition plate (24) close to the second inlet (211) and close to the second flow channel (215) abuts against the protective side plate (23).

7. The motor controller according to claim 6, characterized in that: One end of the partition plate (24) close to the second outlet (212) and close to the first flow channel (214) abuts against the protective side plate (23).

8. The motor controller according to claim 5, characterized in that: The protection assembly (2) comprises a protection bottom plate (22) and a protection side plate (23); the protection bottom plate (22) is arranged opposite to the opening of the first chamber (11) and covers the opening of the first chamber (11); the protection side plate (23) is located on a side of the protection bottom plate (22) away from the bottom shell (1) and is arranged around the protection bottom plate (22); A plurality of partition plates (24) are arranged at intervals on the protective bottom plate (22); along the second direction, the plurality of partition plates (24) are arranged at intervals relative to each other, and the installation space (213) is formed between two adjacent partition plates (24); the second direction is perpendicular to the arrangement direction of the second inlet (211) and the second outlet (212); along the extension direction of the partition plates (24), the first flow channel (214) and the second flow channel (215) are respectively formed on both sides of the plurality of partition plates (24).

9. The motor controller according to claim 6, characterized in that: The protection component (2) further comprises: a top cover (25), the top cover (25) being arranged on a side of the protective side plate (23) away from the protective bottom plate (22); and, A first sealing ring (26); Wherein, a first sealing groove is formed on a side of the top cover (25) close to the protective side plate (23), and the first sealing ring (26) is located in the first sealing groove; or, A second sealing groove is formed on one side of the protective side plate (23) close to the top cover (25), and the first sealing ring (26) is located in the second sealing groove.

10. The motor controller according to claim 1, characterized in that: A plurality of spoiler columns (3) are formed in the first chamber (11), and the plurality of spoiler columns (3) are located between the first inlet (111) and the first outlet (112).

11. An electric drive system, characterized in that: The electric drive system comprises the motor controller according to any one of claims 1-10.

12. A vehicle, characterized in that: The vehicle includes the electric drive system of claim 11.

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