Motor controller and engineering vehicle

Abstract

The invention discloses a motor controller and an engineering vehicle, relates to the technical field of motor controllers, and aims to realize that different power modules are packaged by the same shell. The motor controller comprises a box body assembly, a power module and a capacitor assembly. The box body assembly comprises a box body and a cover plate, the box body comprises a mounting cavity, an open cooling flow channel is formed in the bottom, away from the mounting cavity, of the box body, and the cover plate is fixedly connected with the box body and blocks the opening of the cooling flow channel. The power module is detachably mounted in the mounting cavity. The capacitor assembly is detachably installed in the installation cavity. Wherein the projection of the cooling flow channel on the bottom surface of the box body is at least partially overlapped with the projections of the power module and the capacitor assembly on the bottom surface of the box body, so that the power module and the capacitor assembly are cooled through the cooling flow channel. According to the technical scheme, no matter which structure the power module adopts, the power module can be installed in the installation cavity, the adaptability of the box body assembly is improved, and the mold opening cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor controllers, and in particular to a motor controller and an engineering vehicle. Background Art

[0002] With the further development of electric vehicle technology, the demand for new energy electric vehicles is increasing, and the demand for new energy technology in the field of heavy-duty trucks is also increasing. The demand for power in heavy-duty trucks such as buses and mining trucks is much greater than that in commercial vehicles. The power modules currently on the market have different packaging forms such as half-bridge and full-bridge. At the same time, due to the different cooling forms of power modules with different packages, the power modules with different packages in the motor controller cannot be assembled in the same structure of the shell. Only shells with different structures can be used to install power modules with different packages. Each shell requires a separate mold to be developed. In addition, the existing shell and vehicle installation points are fixed installation point designs, which cannot meet the requirements of heavy-duty truck models for different installation foot distances. Different box molds can only be developed for different models, which increases the mold opening cost.

[0003] The inventors have discovered that there are at least the following problems in the prior art: With the continuous development of motor controller platformization and the increasingly stringent market control over controller costs, how to achieve the use of the same housing package for different power modules has become an issue that needs to be urgently addressed in the industry. Summary of the invention

[0004] The present invention provides a motor controller and an engineering vehicle, which are used to realize packaging of different power modules using the same housing.

[0005] An embodiment of the present invention provides a motor controller, comprising:

[0006] A box assembly, comprising a box body and a cover plate, wherein the box body comprises a mounting cavity, an open cooling channel is arranged at the bottom of the box body away from the mounting cavity, and the cover plate is fixedly connected to the box body and blocks the opening of the cooling channel;

[0007] A power module is detachably mounted in the mounting cavity; and

[0008] A capacitor assembly is detachably mounted in the mounting cavity;

[0009] The projection of the cooling channel on the bottom surface of the box body at least partially overlaps with the projections of the power module and the capacitor assembly on the bottom surface of the box body, so that the power module and the capacitor assembly are cooled through the cooling channel.

[0010] In some embodiments, the motor controller further comprises:

[0011] an inflow pipeline, which is in communication with the cooling channel and is located upstream of the cooling channel to input cooling fluid into the cooling channel; and

[0012] The outflow pipeline is communicated with the cooling channel and is located downstream of the cooling channel to output the cooling fluid in the cooling channel.

[0013] In some embodiments, the cooling channel comprises:

[0014] an inflow channel, wherein the projection of the inflow channel on the bottom surface of the box body at least partially overlaps with the projections of the power module and the capacitor assembly on the bottom surface of the box body; the inflow channel comprises a first inflow port and a first outflow port, the first inflow port is communicated with the inflow pipeline, and the first outflow port is communicated with the installation cavity; and

[0015] An outflow channel, the projection of the outflow channel on the bottom surface of the box body at least partially overlaps with the projection of the power module on the bottom surface of the box body, and the outflow channel includes a second inlet and a second outlet; the second inlet is connected to the installation cavity, and the second outlet is connected to the outflow pipeline.

[0016] In some embodiments, the inflow channel is located upstream of the outflow channel, and a fluid flow length of the inflow channel is greater than a fluid flow length of the outflow channel.

[0017] In some embodiments, the cooling fluid flowing into the flow channel is constructed to flow along the following path: the cooling fluid first cools the power module, then cools the capacitor assembly, then returns to cool the power module, and then flows into the installation cavity through the first outlet.

[0018] In some embodiments, the first outlet of the inflow channel corresponds to the position of the power component in the installation cavity.

[0019] In some embodiments, the second inlet of the outflow channel corresponds to the position of the power component in the installation cavity.

[0020] In some embodiments, the power module includes a full-bridge IGBT, and the full-bridge IGBT includes a first plate and a first heat dissipation pin fin located at the bottom of the first plate; the first plate and the bottom surface of the box body are located in the installation cavity to form a first cavity, and the first cavity and the cooling channel are connected via the first flow outlet and the second flow inlet, and the cooling fluid and the first heat dissipation pin fin are both located in the first cavity.

[0021] In some embodiments, the power module includes a half-bridge IGBT, and the motor controller also includes a heat dissipation component, which is detachably fixedly connected to the half-bridge IGBT; the heat dissipation component includes a second plate and a second heat dissipation pin fin located at the bottom of the second plate; the second plate and the bottom surface of the box body are located in the installation cavity to form a second cavity, and the second cavity and the cooling channel are connected via the first flow outlet and the second flow inlet, and the cooling fluid and the second heat dissipation pin fins are both located in the second cavity.

[0022] In some embodiments, the motor controller further comprises:

[0023] The mounting seat is detachably mounted on the side of the box body, and the mounting seat is provided with a mounting hole for connecting with an external component.

[0024] In some embodiments, there are multiple mounting seats, and each mounting seat is dispersedly arranged on a side surface of the box body.

[0025] In some embodiments, the motor controller further comprises:

[0026] A flow guide is installed in the cooling channel.

[0027] An embodiment of the present invention further provides an engineering vehicle, comprising a motor controller provided by any technical solution of the present invention.

[0028] The motor controller provided by the above technical solution is provided with an open cooling channel, and the area covered by the cooling channel directly corresponds to the position of the power module and the capacitor assembly in the installation cavity, so that the area where the power module and the capacitor assembly are located can be cooled at the same time, which can greatly improve the heat dissipation effect of the power module and the capacitor assembly, so that the temperature of the power module and the capacitor assembly will not be too high. In addition, no matter what structure the power module adopts, it can be installed in the installation cavity, which also realizes the use of the same installation cavity to install power modules of different structures. No matter what structure the power module is, the power module and the capacitor assembly can be cooled, which improves the adaptability of the box assembly, reduces the mold opening cost, and saves nearly 100,000 yuan. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a motor controller provided in an embodiment of the present invention.

[0031] Figure 2A schematic diagram of the bottom structure of the box body of the motor controller provided in an embodiment of the present invention.

[0032] Figure 3 A schematic diagram of the structure of a full-bridge IGBT of a motor controller provided in an embodiment of the present invention.

[0033] Figure 4 A schematic diagram of the flow direction of the cooling fluid when the power module of the motor controller provided in an embodiment of the present invention is a full-bridge IGBT.

[0034] Figure 5 A schematic diagram of the three-dimensional structure of a motor controller provided in another embodiment of the present invention.

[0035] Figure 6 A schematic diagram of the flow direction of the cooling fluid when the power module of the motor controller provided by another embodiment of the present invention is a half-bridge IGBT.

[0036] Figure 7 A schematic diagram of the flow direction of the cooling fluid when the power module of the motor controller provided by another embodiment of the present invention is a half-bridge IGBT.

[0037] Reference numerals:

[0038] 1. Box assembly; 2. Power module; 3. Capacitor assembly; 4. Inflow pipeline; 5. Outflow pipeline; 6. Mounting seat; 7. Sealing ring; 8. Heat dissipation component;

[0039] 11. Box body; 12. Cover plate; 110. Mounting cavity; 111. Cooling channel; 1111. Inflow channel; 1112. Outflow channel; 1111a. First inflow port; 1111b. First outflow port; 1112a. Second inflow port; 1112b. Second outflow port;

[0040] 21. A first plate; 22. A first heat dissipation pin fin. DETAILED DESCRIPTION

[0041] Combine the following Figure 1 to Figure 7 The technical solution provided by the present invention is described in more detail. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as being merely exemplary and not limiting.

[0042] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also including other elements.

[0043] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0044] All terms used in the present disclosure, including technical terms or scientific terms, have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0045] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment are considered part of the specification.

[0046] The dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. In the drawings, the same reference numerals are attached to common structural elements or structural elements of the same type, and their repeated descriptions are appropriately omitted.

[0047] Figure 1 A schematic diagram of the three-dimensional structure of a motor controller provided in an embodiment of the present invention. Figure 2 A schematic diagram of the bottom structure of the box body of the motor controller provided in an embodiment of the present invention. Figure 3 A schematic diagram of the structure of a full-bridge IGBT of a motor controller provided in an embodiment of the present invention. Figure 4 A schematic diagram of the flow direction of the cooling fluid when the power module of the motor controller provided in an embodiment of the present invention is a full-bridge IGBT.

[0048] An embodiment of the present invention provides a motor controller, including a box assembly 1, a power module 2 and a capacitor assembly 3. The box assembly 1 includes a box body 11 and a cover plate 12, the box body 11 includes an installation cavity 110, and an open cooling channel 111 is provided at the bottom of the box body 11 away from the installation cavity 110, and the cover plate 12 is fixedly connected to the box body 11 and blocks the opening of the cooling channel 111, specifically, it can be welded. The power module 2 is detachably installed in the installation cavity 110. The capacitor assembly 3 is detachably installed in the installation cavity 110. Among them, the projection of the cooling channel 111 on the bottom surface of the box body 11 at least partially overlaps with the projections of the power module 2 and the capacitor assembly 3 on the bottom surface of the box body 11, so as to cool the power module 2 and the capacitor assembly 3 through the cooling channel 111.

[0049] The box assembly 1 is used to install the power module 2 and the capacitor assembly 3. The power module 2 and the capacitor assembly 3 are installed inside the installation cavity 110 of the box assembly 1. The installation cavity 110 is a cavity with an open top, such as Figure 1 As shown. On the back of the box assembly 1, that is, the side away from the installation cavity 110, the box assembly 1 is provided with a cooling channel 111. Figure 1 Taking the illustrated direction as an example, the opening of the cooling channel 111 faces downward, and the opening of the mounting cavity 110 faces upward. Figure 2 The viewing direction is bottom view. Figure 2 The position of the cooling channel 111 is shown. The cooling channel 111 includes two sections: an inlet channel 1111 and an outlet channel 1112. The inlet channel 1111 introduces external cooling fluid into the mounting cavity 110 of the box assembly 1. The outlet channel 1112 is used to guide the cooling fluid in the mounting cavity 110 out of the box assembly 1.

[0050] As described above, the installation cavity 110 is used to install the power module 2 and the capacitor assembly 3. The capacitor assembly 3 is completely cooled by the cooling channel 111 arranged on the back of the box assembly 1. The power module 2 is cooled by the cooling channel 111 on the back of the box assembly 1 and the cooling fluid flowing into the power module 2 from the cooling channel 111.

[0051] The power module 2 has two structural forms: full-bridge IGBT and half-bridge IGBT. The specific structure of the full-bridge IGBT is first introduced here, and the specific structure of the half-bridge IGBT is introduced later. The structures of the two power modules 2 are different. The full-bridge IGBT includes a first plate 21 and a first heat dissipation pin fin 22 located at the bottom of the first plate 21. The first plate 21 is roughly a flat plate, and the first plate 21 is located in the installation cavity 110 of the box body 11 of the box assembly 1. The inner wall of the box body 11 can be provided with a protrusion, and the protrusion cooperates with the first plate 21 to form a closed cavity. The first heat dissipation pin fin 22 is located in the first cavity, and other electrical components installed on the side of the first plate 21 away from the first heat dissipation pin fin 22 are not located in the first cavity. The so-called closed first cavity means that the first cavity is isolated from other electrical components located on the first plate 21. The cooling fluid can flow into the first cavity from the cooling channel 111, but the cooling fluid will not enter the area where other electrical components on the first plate 21 are located. It can be understood that the first plate 21 and the lower middle area of ​​the mounting cavity 110 form a partition layer, which allows the cooling fluid to enter.

[0052] See also Figure 3 In some embodiments, the power module 2 includes a full-bridge IGBT, and the full-bridge IGBT includes a first plate 21 and a first heat dissipation pin fin 22 located at the bottom of the first plate 21; the first plate 21 and the bottom surface of the box body 11 located in the installation cavity 110 form a first cavity, and the first cavity and the cooling channel 111 are connected via the first flow outlet 1111b and the second flow inlet 1112a, and the cooling fluid and the first heat dissipation pin fin 22 are both located in the first cavity. The first heat dissipation pin fin 22 of the full-bridge IGBT is used to be immersed in the cooling fluid in the first cavity. The first heat dissipation pin fin 22 is a densely arranged metal needle with good thermal conductivity. Immersing the first heat dissipation pin fin 22 in the cooling fluid can improve the heat dissipation efficiency of the first heat dissipation pin fin 22, increase the heat dissipation efficiency of the full-bridge IGBT, better control the temperature of the full-bridge IGBT during operation, and prevent various adverse effects caused by the high temperature of the full-bridge IGBT.

[0053] The power module 2 and the capacitor assembly 3 are arranged side by side and are both located on the front side of the box body 11, that is, in the installation cavity 110. A seal is sandwiched between the power module 2 and the inner wall of the box body 11, and the sealing ring 7 of the power module 2 is installed in the sealing groove on the inner wall of the box body 11 to achieve a sealed connection between the two. In addition, the power module 2 is also connected to the capacitor assembly 3 and the box body 11 by bolts. The capacitor assembly 3 can specifically adopt a thin film capacitor, which is installed on the upper part of the box body 11 by bolts. The cooling channel 111 is located on the back side of the box body 11, and the cooling channel 111 can dissipate heat for the power module 2 and the capacitor assembly 3 at the same time.

[0054] In some embodiments, the motor controller further includes a flow guide (not shown), which is installed in the cooling channel 111 to accelerate the flow of the cooling fluid and reduce the flow rate loss during the flow of the cooling fluid.

[0055] The above technical solution, since an open cooling channel 111 is provided, and the area covered by the cooling channel 111 directly corresponds to the position of the power module 2 and the capacitor assembly 3 in the installation cavity 110, can dissipate heat from the area where the power module 2 and the capacitor assembly 3 are located at the same time, which can greatly improve the heat dissipation effect of the power module 2 and the capacitor assembly 3, so that the temperature of the power module 2 and the capacitor assembly 3 will not be too high. In addition, no matter what structure the power module 2 adopts, it can be installed in the installation cavity 110, so that the same installation cavity 110 is used to install power modules 2 of different structures. No matter what structure the power module 2 has, the power module 2 and the capacitor assembly 3 can be cooled, which improves the adaptability of the box assembly 1 and reduces the mold opening cost.

[0056] In some embodiments, the motor controller further includes an inflow pipe 4 and an outflow pipe 5. The inflow pipe 4 is in communication with the cooling channel 111 and is located upstream of the cooling channel 111 to input cooling fluid into the cooling channel 111. The outflow pipe 5 is in communication with the cooling channel 111 and is located downstream of the cooling channel 111 to output the cooling fluid in the cooling channel 111. The inflow pipe 4 and the outflow pipe 5 are each connected to the box body 11 by gluing and pressing.

[0057] In some embodiments, the cooling channel 111 includes an inflow channel 1111 and an outflow channel 1112. The projection of the inflow channel 1111 on the bottom surface of the box body 11 at least partially overlaps with the projection of the power module 2 and the capacitor assembly 3 on the bottom surface of the box body 11; the inflow channel 1111 includes a first inflow port 1111a and a first outflow port 1111b, the first inflow port 1111a is connected to the inflow pipeline 4, and the first outflow port 1111b is connected to the installation cavity 110. The projection of the outflow channel 1112 on the bottom surface of the box body 11 at least partially overlaps with the projection of the power module 2 on the bottom surface of the box body 11, and the outflow channel 1112 includes a second inflow port 1112a and a second outflow port 1112b; the second inflow port 1112a is connected to the installation cavity 110, and the second outflow port 1112b is connected to the outflow pipeline 5.

[0058] See also Figure 2 and Figure 3 In some embodiments, the inflow channel 1111 is located upstream of the outflow channel 1112 , and the fluid flow length of the inflow channel 1111 is greater than the fluid flow length of the outflow channel 1112 .

[0059] The inflow channel 1111 is roughly an L-shaped channel, and the outflow channel 1112 is roughly a tortuous channel. The inflow channel 1111 is divided into the four sections of sub-channels introduced above. The inflow channel 1111 is located upstream of the outflow channel 1112, and the entire inflow channel 1111 covers more bottom area of ​​the box body 11. The outflow channel 1112 covers less bottom area of ​​the box body 11. The fluid flow length of the inflow channel 1111 is greater than the fluid flow length of the outflow channel 1112, that is, the cooling fluid flows longer in the inflow channel 1111 and flows shorter in the outflow channel 1112.

[0060] The cooling channel 111 adopts the above-mentioned setting method. On the one hand, it can cool more areas at the bottom of the box body 11, and on the other hand, it can also introduce the cooling fluid into the interior of the installation cavity 110, so that the cooling fluid directly contacts the heat dissipation pins of the power module 2 to improve the heat dissipation efficiency and improve the heat dissipation effect, so that the temperature of the power module 2 is more reliable and the heat dissipation is faster.

[0061] In some embodiments, the first outlet 1111b of the inflow channel 1111 corresponds to the position of the power component in the installation cavity 110. This arrangement allows the cooling fluid entering the inflow channel 1111 to first cool one side of the power module 2, then cool the capacitor assembly 3, and then return to the power module 2 to continue cooling the power module 2, so that the temperature of the cooling fluid cooling the capacitor assembly 3 will not be too high, and the cooling efficiency of the capacitor assembly 3 is higher.

[0062] In some embodiments, the second inlet 1112a of the outflow channel 1112 corresponds to the position of the power component in the mounting cavity 110. This arrangement allows the first heat dissipation pin fins 22 of the power component to be immersed in the cooling fluid, resulting in higher cooling efficiency.

[0063] See also Figure 3 and Figure 4 In some embodiments, the cooling fluid flowing into the flow channel 1111 is constructed to flow along the following path: the cooling fluid first cools the power module 2, then cools the capacitor assembly 3, then returns to cool the power module 2, and then flows into the installation cavity 110 through the first flow outlet 1111b.

[0064] Figure 4The red arrow in the figure indicates the flow direction of the cooling channel 111. From the direction indicated by the arrow, it can be seen that the cooling fluid flows along the following path: the inflow channel 1111 is divided into multiple sub-channels by a flow dividing plate, and each sub-channel is connected in sequence, and the cooling fluid passes through each sub-channel one by one. The corresponding positions of each sub-channel satisfy the following relationship: the cooling fluid enters the first sub-channel S1 through the inflow pipe 4, and the first sub-channel S1 corresponds to the area of ​​the power module 2, and then the cooling fluid flows into the second sub-channel S2 corresponding to the capacitor module, and then returns from the second sub-channel S2 to flow into the third sub-channel S3. The second sub-channel S2 and the third sub-channel S3 are arranged side by side and are roughly parallel, and the outlet end of the second sub-channel S2 is connected to the inlet end of the third sub-channel S3. Downstream of the third sub-channel S3 is the fourth sub-channel S4, and the fourth sub-channel S4 mainly corresponds to the area where the power module 2 is located. Then the cooling fluid in the fourth sub-channel S4 enters the first cavity introduced above through the first flow outlet 1111b. The first cavity is a part of the installation cavity 110, but is divided by the first plate 21. After the cooling fluid in the first cavity fills the entire first cavity, the first heat dissipation pin fins 22 immersed in the first cavity can be cooled. Then the cooling fluid in the first cavity enters the outflow channel 1112 through the second inlet 1112a. The outflow channel 1112 is a whole and is not divided into multiple sub-channels. The cooling fluid in the outflow channel 1112 enters the outflow channel 1112 through the second inlet 1112a of the outflow channel 1112, and then flows from the outflow channel 1112 into the outflow pipe 5.

[0065] Figure 5 A schematic diagram of the three-dimensional structure of a motor controller provided in another embodiment of the present invention. Figure 6 A schematic diagram of the flow direction of the cooling fluid when the power module 2 of the motor controller provided in another embodiment of the present invention is a half-bridge IGBT. Figure 7 A schematic diagram of the flow direction of the cooling fluid when the power module 2 of the motor controller provided in another embodiment of the present invention is a half-bridge IGBT.

[0066] See also Figures 5 to 7 In some embodiments, the power module 2 includes a half-bridge IGBT. The structure of the half-bridge IGBT is different from that of the full-bridge IGBT. The half-bridge IGBT is installed in the mounting cavity 110 through a separate heat dissipation component, while the full-bridge IGBT is directly installed in the mounting cavity 110. The half-bridge IGBT includes a plurality of independent modules, and each module is cooled in parallel, that is, the cooling fluid is divided into multiple paths, and one path of cooling fluid flows into each module.

[0067] Specifically, the motor controller also includes a heat dissipation component 8, which is detachably fixedly connected to the half-bridge IGBT; the heat dissipation component 8 includes a second plate (i.e., the component corresponding to serial number 8) and a second heat dissipation pin fin (not shown in the figure) located at the bottom of the second plate; the second plate and the bottom surface of the box body 11 located in the installation cavity 110 form a second cavity, and the second cavity and the cooling channel 111 are connected via the first flow outlet 1111b and the second flow inlet 1112a, and the cooling fluid and the second heat dissipation pin fin are both located in the second cavity. The inner wall of the box body 11 is first machined to remove the excess part, so as to provide space for the installation of the heat dissipation component. The second plate is connected to the box body 11 by stir friction welding, and the material of the second plate is the same as that of the box body 11 to improve the stability of stir friction welding. The staggered second heat dissipation pin fins on the second plate can play a guiding role, so that the flow of the coolant is accelerated under the premise of meeting the heat dissipation requirements of the half-bridge IGBT.

[0068] The second plate and the bottom of the mounting cavity 110 form a closed second cavity. The second cavity is similar to the first cavity described above, and is used to immerse the second heat dissipation pin-fins in the cooling fluid to enhance the heat dissipation of the half-bridge IGBT.

[0069] The half-bridge parallel IGBT module is connected to the capacitor assembly (specifically, a film capacitor) 3, the second plate and the box body 11 through bolts. The second heat dissipation pin fins staggered on the second plate can disperse the cooling fluid to avoid turbulence and maximize the heat transferred from the half-bridge IGBT to the second cavity. The flow path of the cooling fluid is as follows: Figure 6 As shown: the cooling fluid enters the cooling channel 111 inside the box body 11 through the inflow pipe 4, and flows into the bottom of the power module 2 and the capacitor assembly 3 to assist in heat dissipation. The guide member in the cooling channel 111 can accelerate the flow of the coolant and reduce the flow velocity loss during the flow of the cooling fluid. The cooling fluid passes through the second heat dissipation pin fins at the bottom of the second plate and then flows out through the outflow pipe 5.

[0070] Whether the power module 2 adopts a full-bridge IGBT or a half-bridge IGBT, it does not affect the structure of the cooling channel 111 and the flow path of the cooling fluid. This also shows that the box assembly 1 has high adaptability and can be used for power modules 2 of various structures.

[0071] In each of the above embodiments, the motor controller also includes a mounting base 6, which is detachably mounted on the side of the box body 11, and can be specifically connected by bolts. The mounting base 6 is provided with mounting holes for connecting with external components. The mounting base 6 can be a casting, a sheet metal part, and other structures. The structure of the mounting base 6 is flexible and can be used. Figure 1 and Figure 5The L-shaped structure shown may also adopt a special-shaped structure, and the positions of the mounting holes connecting the mounting seat 6 with other components may also be changed with the structure of the mounting seat 6 to meet the spacing requirements and position of the box assembly 1 during installation.

[0072] Continue to see Figure 1 and Figure 5 In some embodiments, there are multiple mounting seats 6, and each mounting seat 6 is dispersedly arranged on the side of the box body 11. The box assembly 1 can be more stably installed and fixed by multiple mounting seats 6.

[0073] In the above technical solution, the motor controller is compatible with different heavy-duty truck installation layouts through a detachable mounting base 6. On the basis of ensuring that the structure of the box assembly 1 remains unchanged, the compatibility of multiple platform models is achieved by replacing the mounting base 6 with different structures. The types of box assemblies 1 are reduced, and one box assembly 1 can be used in multiple models and multiple power platforms, which greatly reduces the mold opening cost of the box assembly and saves nearly 100,000 yuan.

[0074] The embodiment of the present invention further provides an engineering vehicle, comprising a motor controller provided by any technical solution of the present invention. The engineering vehicle may be a heavy-duty vehicle.

[0075] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the protection content of the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0076] In the description of the present invention, each technical feature may be combined with other technical features where feasible.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A motor controller, characterized in that: include: A box assembly (1) comprises a box body (11) and a cover plate (12), wherein the box body (11) comprises a mounting cavity (110), an open cooling channel (111) is provided at the bottom of the box body (11) away from the mounting cavity (110), and the cover plate (12) is fixedly connected to the box body (11) and blocks the opening of the cooling channel (111); A power module (2) is detachably mounted in the mounting cavity (110); and A capacitor assembly (3) is detachably mounted in the mounting cavity (110); The projection of the cooling channel (111) on the bottom surface of the box body (11) at least partially overlaps with the projections of the power module (2) and the capacitor assembly (3) on the bottom surface of the box body (11), so that the power module (2) and the capacitor assembly (3) are cooled through the cooling channel (111).

2. The motor controller according to claim 1, characterized in that: Also includes: an inflow pipeline (4), which is in communication with the cooling flow channel (111) and is located upstream of the cooling flow channel (111) so as to input cooling fluid into the cooling flow channel (111); as well as An outflow pipeline (5) is in communication with the cooling flow channel (111) and is located downstream of the cooling flow channel (111) so as to output the cooling fluid in the cooling flow channel (111).

3. The motor controller according to claim 1, characterized in that: The cooling channel (111) comprises: an inflow channel (1111), wherein a projection of the inflow channel (1111) on the bottom surface of the box body (11) at least partially overlaps with projections of the power module (2) and the capacitor assembly (3) on the bottom surface of the box body (11); the inflow channel (1111) comprises a first inflow port (1111a) and a first outflow port (1111b), wherein the first inflow port (1111a) is connected to the inflow pipeline (4), and the first outflow port (1111b) is connected to the installation cavity (110); and An outflow channel (1112), wherein a projection of the outflow channel (1112) on the bottom surface of the box body (11) at least partially overlaps with a projection of the power module (2) on the bottom surface of the box body (11), and the outflow channel (1112) comprises a second inflow inlet (1112a) and a second outflow outlet (1112b); the second inflow inlet (1112a) is in communication with the installation cavity (110), and the second outflow outlet (1112b) is in communication with the outflow pipeline (5).

4. The motor controller according to claim 3, characterized in that: The inflow channel (1111) is located upstream of the outflow channel (1112), and a fluid flow length of the inflow channel (1111) is greater than a fluid flow length of the outflow channel (1112).

5. The motor controller according to claim 3, characterized in that: The cooling fluid in the inflow channel (1111) is constructed to flow along the following path: the cooling fluid first cools the power module (2), then cools the capacitor assembly (3), then returns to cool the power module (2), and then flows into the installation cavity (110) via the first flow outlet (1111b).

6. The motor controller according to claim 3, characterized in that: The first flow outlet (1111b) of the inflow channel (1111) corresponds to the position of the power component in the installation cavity (110).

7. The motor controller according to claim 3, characterized in that: The second inlet (1112a) of the outflow channel (1112) corresponds to the position of the power component in the installation cavity (110).

8. The motor controller according to claim 3, characterized in that: The power module (2) comprises a full-bridge IGBT, and the full-bridge IGBT comprises a first plate (21) and a first heat dissipation pin fin (22) located at the bottom of the first plate (21); the first plate (21) and the bottom surface of the box body (11) located in the installation cavity (110) form a first cavity, the first cavity and the cooling channel (111) are connected via the first flow outlet (1111b) and the second flow inlet (1112a), and the cooling fluid and the first heat dissipation pin fin (22) are both located in the first cavity.

9. The motor controller according to claim 3, characterized in that: The power module (2) comprises a half-bridge IGBT, and the motor controller further comprises a heat dissipation component, the heat dissipation component is detachably fixedly connected to the half-bridge IGBT; the heat dissipation component comprises a second plate and a second heat dissipation pin fin located at the bottom of the second plate; the second plate and the bottom surface of the box body (11) located in the installation cavity (110) form a second cavity, the second cavity and the cooling channel (111) are connected via the first flow outlet (1111b) and the second flow inlet (1112a), and the cooling fluid and the second heat dissipation pin fin are both located in the second cavity.

10. The motor controller according to claim 1, characterized in that: Also includes: The mounting seat (6) is detachably mounted on the side of the box body (11), and the mounting seat (6) is provided with a mounting hole for connecting with an external component.

11. The motor controller according to claim 10, characterized in that: There are a plurality of mounting seats (6), and each mounting seat (6) is dispersedly arranged on a side surface of the box body (11).

12. The motor controller according to claim 1, characterized in that: Also includes: A flow guide member is installed in the cooling flow channel (111).

13. An engineering vehicle, characterized in that: It comprises the motor controller described in any one of claims 1 to 12.

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