Radiator of power module, power module, motor controller and vehicle

Abstract

The utility model relates to a radiator of a power module, the power module, a motor controller and a vehicle, the radiator of the power module comprises a main body and a plurality of heat exchange structures, the main body is provided with an inlet, an outlet and a flow channel communicated with the inlet and the outlet, the plurality of heat exchange structures are sequentially arranged in the flow channel from the inlet to the outlet, the through-flow area of the flow channel at the upstream heat exchange structure in every two adjacent heat exchange structures is larger than the through-flow area of the flow channel at the downstream heat exchange structure, the main body is further provided with a plurality of heat exchange areas suitable for installing power modules, and each heat exchange structure is arranged to be capable of exchanging heat with the power module of the power module through the corresponding heat exchange area. Thus, the heat exchange effect of the cooling liquid on the downstream heat exchange structure is close to the heat exchange effect on the upstream heat exchange structure, each heat exchange area has a good heat exchange effect on the power module, and the current output capacity of the whole power module is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power module heat dissipation, and in particular, to a radiator of a power module, a power module, a motor controller and a vehicle. Background Art

[0002] The power module is the core component for the motor controller to realize its functions. Its main function is to convert the external input DC power into AC output through the orderly switching of internal transistors. Since the conversion process is accompanied by energy consumption and a large amount of heat is generated, the module needs to be cooled to prevent the internal chip of the module from overheating and causing power module failure.

[0003] In the related art, a liquid cooling radiator is usually used to dissipate heat from the power module, but the heat dissipation effect is not ideal. Utility Model Content

[0004] The purpose of the present disclosure is to provide a heat sink for a power module, a power module, a motor controller and a vehicle to solve the problems existing in the related art.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present disclosure, a heat sink for a power module is provided, comprising a main body and a plurality of heat exchange structures;

[0006] The main body is provided with an inlet, an outlet, and a flow channel connecting the inlet and the outlet;

[0007] In the direction from the inlet to the outlet, the plurality of heat exchange structures are sequentially arranged in the flow channel, wherein the flow area of ​​the heat exchange structure located upstream of each two adjacent heat exchange structures in the flow channel is greater than the flow area of ​​the heat exchange structure located downstream;

[0008] The main body is also provided with a plurality of heat exchange areas suitable for installing power modules, and each of the heat exchange structures is configured to be able to exchange heat with a power module of the power module group through the corresponding heat exchange area.

[0009] Optionally, in a direction from the inlet to the outlet, the plurality of heat exchange structures are arranged at intervals.

[0010] Optionally, each of the heat exchange structures comprises a plurality of fins arranged at intervals;

[0011] The spacing between the multiple fins of the heat exchange structure located upstream of every two adjacent heat exchange structures is greater than the spacing between the multiple fins of the heat exchange structure located downstream, so that the flow area of ​​the flow channel at the heat exchange structure located upstream of every two adjacent heat exchange structures is greater than the flow area of ​​the heat exchange structure located downstream.

[0012] Optionally, the multiple fins in each of the heat exchange structures are arranged at equal intervals.

[0013] Optionally, one end of the fin is connected to the corresponding heat exchange area, and the other end extends perpendicular to the flow direction of the coolant.

[0014] Optionally, the plurality of heat exchange structures include a first heat exchange structure, a second heat exchange structure and a third heat exchange structure;

[0015] There is a first spacing between the multiple fins in the first heat exchange structure, there is a second spacing between the multiple fins in the second heat exchange structure, and there is a third spacing between the multiple fins in the third heat exchange structure;

[0016] The ratio of the first spacing, the second spacing and the third spacing is 12:9:7 to 18:15:13.

[0017] Optionally, in a direction from the inlet to the outlet, the plurality of heat exchange zones are arranged at intervals;

[0018] The multiple heat exchange areas are suitable for corresponding to the multiple power modules of the power module, and each heat exchange area is suitable for exchanging heat with a separate power module.

[0019] Optionally, the main body comprises a first half body and a second half body;

[0020] A concave portion is disposed on a side of the second half body facing the first half body. The first half body is connected to the second half body and defines the flow channel together with the concave portion.

[0021] Optionally, the heat sink further includes a sealing ring, which is arranged around the recess and is pressed between the first half body and the second half body.

[0022] Optionally, the heat sink further comprises a fastener, and the first half body is detachably connected to the second half body via the fastener.

[0023] Optionally, the first half has a first side and a second side that are opposite;

[0024] The plurality of heat exchange areas are located on the first side, and the plurality of heat exchange structures are located on the second side;

[0025] The first side is provided with a plurality of crimping protrusions, and the plurality of crimping protrusions are suitable for cooperating with a crimping tool to achieve crimping of the first half body and the second half body.

[0026] Optionally, an end surface of the crimping protrusion away from the first half body is a crimping surface, and the crimping surfaces of the multiple crimping protrusions are located in the same plane.

[0027] Optionally, in the direction from the inlet to the outlet, the plurality of heat exchange areas are arranged at intervals, and a crimping protrusion is arranged between every two adjacent heat exchange areas.

[0028] Optionally, a plurality of annular protrusions are formed on the main body, and the annular protrusions are suitable for being arranged around corresponding welding positions of the heat exchange area and the power module.

[0029] Optionally, the heat exchange area includes a plurality of support bosses arranged at intervals, and the plurality of support bosses are suitable for placing solder parts.

[0030] According to a second aspect of the present disclosure, a power module is provided, comprising at least one power module and the above-mentioned heat sink, wherein the power module is installed in the heat exchange area.

[0031] Optionally, the power module includes a plurality of power modules, the plurality of power modules include a first power module configured as a U-phase power module, a second power module configured as a V-phase power module, and a third power module configured as a W-phase power module;

[0032] The first power module, the second power module, and the third power module are arranged along a direction from the inlet to the outlet.

[0033] According to a third aspect of the present disclosure, there is provided a motor controller, comprising a motor controller body and the above-mentioned power module, wherein the power module is mounted on the motor controller body.

[0034] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising a vehicle body and the above-mentioned motor controller, wherein the motor controller body is mounted on the vehicle body.

[0035] Through the above technical solution, the power module can be installed in multiple heat exchange areas, so that each heat exchange structure can exchange heat with the power module through the corresponding heat exchange area. Due to the direction from the inlet to the outlet, multiple heat exchange structures are arranged in the flow channel in sequence, that is, the coolant can flow into the flow channel from the inlet, flow through multiple heat exchange structures in sequence, and then flow out of the flow channel from the outlet.

[0036] Since the flow area of ​​the flow channel at the upstream heat exchange structure in each of two adjacent heat exchange structures is greater than the flow area of ​​the flow channel at the downstream heat exchange structure, the flow rate of the coolant at the downstream heat exchange structure in each of two adjacent heat exchange structures is greater than the flow rate at the upstream heat exchange structure. As the coolant flow rate gradually increases, even if the coolant temperature rises in the flow direction of the coolant, the coolant effect improved by the increase in the coolant flow rate is still relatively obvious. Therefore, the heat exchange effect of the coolant on the downstream heat exchange structure can be made close to the heat exchange effect on the upstream heat exchange structure, so that each heat exchange zone has a good heat exchange effect on the power module, thereby improving the current output capacity of the entire power module.

[0037] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0039] Figure 1 is a schematic exploded view of a three-dimensional structure of a radiator provided in one embodiment of the present disclosure;

[0040] Figure 2 is a schematic diagram of the three-dimensional structure of the upper half of a radiator provided in one embodiment of the present disclosure, wherein the second side of the upper half is shown;

[0041] Figure 3 is a schematic diagram of the three-dimensional structure of the lower half of a radiator provided in one embodiment of the present disclosure;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper body of a heat sink provided in an embodiment of the present disclosure, wherein a first side of the upper body is shown, and no power module is installed in the heat exchange area.

[0043] Description of Reference Numerals

[0044] 10-main body; 11-inlet; 12-outlet; 13-flow channel; 14-heat exchange area; 15-slot; 20-heat exchange structure; 21-first heat exchange structure; 22-second heat exchange structure; 23-third heat exchange structure; 24-fin; 25-first half body; 251-first side; 252-second side; 26-second half body; 261-recess; 27-crimping protrusion; 28-annular protrusion; 29-supporting boss; 30-sealing ring; 40-fastener; 50-power module; 51-power module; 52-first power module; 53-second power module; 54-third power module. DETAILED DESCRIPTION

[0045] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0046] In the present disclosure, unless otherwise specified, directional words such as "upper and lower" are generally defined in terms of the drawing direction of the corresponding drawings, while "inside and outside" refer to the inside and outside of the corresponding component outline. In addition, the terms "first", "second" and the like are used to distinguish one element from another and have no order or importance.

[0047] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0048] The study found that the heat dissipation effect of the liquid-cooled radiator on the power module in the related technology is not ideal. The main reason is that due to space limitations, multiple power modules in the power module are usually arranged along the coolant flow path of the liquid-cooled radiator, but the coolant will be gradually heated during the flow process, resulting in the coolant The heat exchange effect of the power module gradually decreases, causing the power module located downstream of the coolant flow path and the power module located upstream of the coolant flow path have a large temperature difference, and the current output capacity of the power module mainly depends on the influence of the power module with the highest temperature. Therefore, the power module located downstream of the coolant flow path and the power module located upstream of the coolant flow path have a large temperature difference, which also limits the current output capacity of the entire power module.

[0049] In view of this, if Figures 1 to 4 As shown, according to the first aspect of the present disclosure, a heat sink for a power module and a power module 50 including the heat sink are provided. The power module 51 may also include at least one power module 51, for example, may include an attached Figure 1 A first power module 52 , a second power module 53 and a third power module 54 are shown.

[0050] like Figure 1 and Figure 2 As shown, the heat sink provided by the present disclosure may include a main body 10 and a plurality of heat exchange structures 20, the main body 10 is provided with an inlet 11, an outlet 12, and a flow channel 13 connecting the inlet 11 and the outlet 12, and the plurality of heat exchange structures 20 are sequentially arranged in the flow channel 13 in the direction from the inlet 11 to the outlet 12, wherein the flow area of ​​the flow channel 13 at the upstream heat exchange structure 20 in each two adjacent heat exchange structures 20 is greater than the flow area of ​​the downstream heat exchange structure 20, and the main body 10 is further provided with a plurality of heat exchange areas 14 suitable for installing the power module 51, and each heat exchange structure 20 is configured to be able to exchange heat with the power module 51 of the power module 50 through the corresponding heat exchange area 14.

[0051] Through the above technical solution, the power module 50 can be installed in multiple heat exchange areas 14, so that each heat exchange structure 20 can exchange heat with the power module 50 through the corresponding heat exchange area 14. Due to the direction from the inlet 11 to the outlet 12, multiple heat exchange structures 20 are arranged in the flow channel 13 in sequence, that is, the coolant can flow into the flow channel 13 from the inlet 11, flow through multiple heat exchange structures 20 in sequence, and then flow out of the flow channel 13 from the outlet 12. When flowing through the heat exchange structure 20, the coolant will exchange heat with it, thereby taking away the heat of the heat exchange structure 20, and then reducing the temperature of the power module 50 (specifically, it can reduce the power module 51).

[0052] Since the flow area of ​​the flow channel 13 at the upstream heat exchange structure 20 in each of two adjacent heat exchange structures 20 is greater than the flow area at the downstream heat exchange structure 20, the flow rate of the coolant at the downstream heat exchange structure 20 in each of two adjacent heat exchange structures 20 is greater than the flow rate at the upstream heat exchange structure 20. As the coolant flow rate gradually increases, even if the coolant temperature increases in the flow direction of the coolant, the cooling effect improved by the increase in the coolant flow rate is still relatively obvious. Therefore, the heat exchange effect of the coolant on the downstream heat exchange structure 20 can be made close to the heat exchange effect on the upstream heat exchange structure 20, so that each heat exchange area 14 has a good heat exchange effect on the power module 50, thereby improving the current output capacity of the entire power module 50.

[0053] Here, the direction from upstream to downstream of the flow channel 13 is the direction from the inlet 11 to the outlet 12 .

[0054] It can be understood that each heat exchange area 14 can be installed with one power module 51 in the power module 50 , or can be installed with multiple power modules 51 in the power module 50 , and the present disclosure does not limit this.

[0055] In order to reduce the flow resistance of the coolant in the flow channel 13, as an implementation method, Figure 2 As shown, multiple heat exchange structures 20 are arranged at intervals from the inlet 11 to the outlet 12. Multiple heat exchange structures 20 are arranged at intervals so that the multiple heat exchange structures 20 are respectively located at corresponding heat exchange areas 14. The flow resistance of the coolant in the flow channel 13 can be reduced without affecting the heat exchange between the heat exchange structure 20 and the power module 50 through the corresponding heat exchange area 14. In addition, since the number of heat exchange structures 20 is reduced, the total weight of the radiator is reduced.

[0056] The present disclosure does not limit the structure of the heat exchange structure 20. As an implementation method, Figure 2As shown, each heat exchange structure 20 includes a plurality of fins 24 arranged at intervals, and the interval between the plurality of fins 24 of the heat exchange structure 20 located upstream of each two adjacent heat exchange structures 20 is greater than the interval between the plurality of fins 24 of the heat exchange structure 20 located downstream, so that the flow area of ​​the flow channel 13 at the heat exchange structure 20 located upstream of each two adjacent heat exchange structures 20 is greater than the flow area of ​​the heat exchange structure 20 located downstream.

[0057] Since the multiple fins 24 of the heat exchange structure 20 are arranged at intervals, the coolant can flow through the heat exchange structure 20 from the intervals between the multiple fins 24 and exchange heat with the fins 24. Therefore, by changing the intervals between the multiple fins 24 of different heat exchange structures 20, the flow area of ​​the heat exchange structure 20 located upstream of each two adjacent heat exchange structures 20 can be larger than the flow area of ​​the heat exchange structure 20 located downstream. In addition, since the fins 24 have a large contact area, a good heat exchange effect can be achieved between the heat exchange structure 20 and the coolant.

[0058] Here, optionally, the fin 24 may be one or more of columnar, tubular and sheet-shaped, which is not limited in the present disclosure.

[0059] As another embodiment, the heat exchange structure 20 includes a plurality of orifice plates arranged at intervals.

[0060] The present disclosure does not limit the arrangement of the fins 24. As an implementation method, Figure 2 As shown, the multiple fins 24 in each heat exchange structure 20 can be arranged at equal intervals, which is convenient for processing on the one hand, and on the other hand, it is convenient for the staff to arrange the multiple fins 24 in different heat exchange structures 20 according to the flow area of ​​the flow channel 13 at different heat exchange structures 20.

[0061] In addition, by arranging the multiple fins 24 in each heat exchange structure 20 at equal intervals, the staff can intuitively observe the density of the multiple fins 24 in different heat exchange structures 20, which is conducive to installing different heat exchange structures 20 in the correct position in the flow channel 13.

[0062] As another embodiment, the plurality of fins 24 in each heat exchange structure 20 may be arranged in a non-interval arrangement.

[0063] The present disclosure does not limit the extension direction of the fin 24. As an embodiment, one end of the fin 24 is connected to the corresponding heat exchange area 14, and the other end extends perpendicular to the flow direction of the coolant. The fin 24 extends perpendicular to the flow direction of the coolant, so that the fin 24 can fully contact the coolant and improve the heat exchange effect.

[0064] In addition, in an embodiment where multiple fins 24 in each heat exchange structure 20 are arranged at equal intervals, one end of the fin 24 is connected to the corresponding heat exchange area 14, which is beneficial for making the heat exchange effect of each heat exchange area 14 on the power module 50 uniform.

[0065] As another embodiment, one end of the fin 24 is connected to the corresponding heat exchange area 14, and the other end extends along an inclined direction to the flow direction of the coolant.

[0066] The present disclosure does not limit the length of the fin 24 . Optionally, one end of the fin 24 away from the heat exchange area 14 may extend to the inner wall of the flow channel 13 , or may have a gap with the inner wall of the flow channel 13 .

[0067] The present disclosure does not limit the number of heat exchange structures 20. Optionally, Figure 2 As shown, in one embodiment of the present disclosure, the plurality of heat exchange structures 20 include a first heat exchange structure 21, a second heat exchange structure 22 and a third heat exchange structure 23, a plurality of fins 24 in the first heat exchange structure 21 have a first spacing, a plurality of fins 24 in the second heat exchange structure 22 have a second spacing, a plurality of fins 24 in the third heat exchange structure 23 have a third spacing, and the ratio of the first spacing, the second spacing and the third spacing is 12:9:7 to 18:15:13. With such a configuration, the speed of the coolant gradually increases when it flows through the first heat exchange structure 21, the second heat exchange structure 22 and the third heat exchange structure 23 in sequence, and the first heat exchange structure 21, the second heat exchange structure 22 and the third heat exchange structure 23 have a similar heat exchange effect with the corresponding heat exchange area 14.

[0068] Optionally, the first heat exchange structure 21 can exchange heat with the U-phase power module 51 through the corresponding heat exchange area 14, the second heat exchange structure 22 can exchange heat with the V-phase power module 51 through the corresponding heat exchange area 14, and the third heat exchange structure 23 can exchange heat with the W-phase power module 51 through the corresponding heat exchange area 14.

[0069] In order to improve the heat dissipation effect of the radiator on the power module 50, as an implementation method, Figure 4 As shown, from the inlet 11 to the outlet 12 , a plurality of heat exchange areas 14 are arranged at intervals, and the plurality of heat exchange areas 14 are suitable for corresponding to a plurality of power modules 51 of the power module 50 , and each heat exchange area 14 is suitable for exchanging heat with a separate power module 51 .

[0070] By exchanging heat between each heat exchange zone 14 and a separate power module 51, the heat exchange effect between each heat exchange zone 14 and a separate power module 51 can be maximized. In addition, the multiple heat exchange zones 14 are arranged at intervals to reduce heat transfer between separate power modules 51, which is beneficial to improving the heat dissipation effect of the radiator on the power module 50.

[0071] In order to facilitate the processing of the flow channel 13 and the installation of the heat exchange structure 20, as an implementation method, Figures 1 to 3 As shown, the main body 10 includes a first half body 25 and a second half body 26, a recess 261 is provided on a side of the second half body 26 facing the first half body 25, the first half body 25 is connected to the second half body 26, and together with the recess 261, a flow channel 13 is defined. The recess 261 can be formed on a side of the second half body 26 facing the first half body 25, and a plurality of heat exchange structures 20 can be installed on the first half body 25 or in the recess 261, and then the first half body 25 is connected to the second half body 26, the flow channel 13 is formed by the first half body 25 and the recess 261, and the plurality of heat exchange structures 20 are located in the flow channel 13.

[0072] In other embodiments, a groove may be provided on the side of the second half body 26 facing the first half body 25 , and a groove may be provided on the side of the first half body 25 facing the second half body 26 . Thus, when the first half body 25 and the second half body 26 are matched, the above-mentioned flow channel 13 may be constructed.

[0073] Alternatively, the inlet 11 and the outlet 12 may be formed on the first half body 25 or the second half body 26. Figure 3 In the illustrated embodiment, both the inlet 11 and the outlet 12 are formed on the second half body 26 and communicate with the recess 261 .

[0074] In order to prevent the coolant from leaking out of the flow channel 13, as an implementation method, Figure 1 As shown, the radiator further includes a sealing ring 30, which is arranged around the recess 261 and is pressed between the first half body 25 and the second half body 26. The sealing ring 30 can be pressed between the first half body 25 and the second half body 26 to seal the gap between the first half body 25 and the second half body 26 to prevent the coolant from leaking out of the flow channel 13.

[0075] Optionally, a slot 15 having a recess 261 may be formed on the side of the second half body 26 facing the first half body 25, and a portion of the sealing ring 30 may be clamped in the slot 15 so that the sealing ring 30 is positioned around the recess 261, and the portion of the sealing ring 30 protruding from the slot 15 is used for sealing contact with the first half body 25.

[0076] In order to facilitate the cleaning of the flow channel 13 and the heat exchange structure 20, as an implementation method, Figure 1 As shown, the radiator further includes a fastener 40, and the first half body 25 is detachably connected to the second half body 26 through the fastener 40. After the radiator has been used for a period of time, the staff can remove the fastener 40, separate the first half body 25 and the second half body 26, and expose the flow channel 13 and the heat exchange structure 20, so that the staff can clean the flow channel 13 and the heat exchange structure 20.

[0077] Optionally, the fastener 40 can be a threaded fastener. A through hole can be formed on the first half body 25, and a threaded hole corresponding to the through hole can be formed on the second half body 26. The threaded fastener passes through the through hole and is threadedly connected to the threaded hole, so that the first half body 25 can be detachably connected to the second half body 26 through the threaded fastener.

[0078] Since the sealing ring 30 has elastic force, it is difficult to fully deform the sealing ring 30 only by tightening the fastener 40. In order to improve the sealing between the first half body 25 and the second half body 26, it is necessary to press the first half body 25 toward the second half body 26 through a crimping tool so that the sealing ring 30 is fully deformed. However, the power module 50 installed on the first half body 25 will cause certain obstacles to the crimping tool.

[0079] In view of this, as an implementation method, Figure 2 and Figure 4 As shown, the first half body 25 has a first side 251 and a second side 252 opposite to each other, a plurality of heat exchange areas 14 are located on the first side 251, a plurality of heat exchange structures 20 are located on the second side 252, and a plurality of crimping protrusions 27 are provided on the first side 251, and the plurality of crimping protrusions 27 are suitable for cooperating with a crimping tool to realize the crimping of the first half body 25 and the second half body 26. Since the crimping protrusions 27 protrude from the first side 251, the crimping tool can realize the crimping of the first half body 25 and the second half body 26 by abutting against the crimping protrusions 27, thereby reducing the obstruction caused by the power module 50 to the crimping tool.

[0080] In addition, after the sealing ring 30 is fully deformed, the first half body 25 and the second half body 26 are connected by the fastener 40 , so that the fastener 40 can be subjected to a greater pre-tightening force to prevent the fastener 40 from loosening.

[0081] Here, optionally, the crimping tool may be a bracket having a plurality of crimping portions, and the plurality of crimping portions are used to abut against corresponding crimping protrusions 27 at the same time.

[0082] Optionally, the power module 50 can be installed on the welding part by welding, silver sintering, or crimping. In the process of welding the power module 50 and the heat exchange area 14, the solder placed between the power module 50 and the heat exchange area 14 will undergo a process of melting, flowing, filling, and solidification, and finally achieve the connection of the power module 50 and the heat exchange area 14.

[0083] When the power module 50 is welded to the heat exchange area 14, the heat generated may cause the first side 251 of the first half body 25 to deform. In order to enable the multiple crimping protrusions 27 to be pressed against the crimping tool at the same time, as an embodiment, the end surface of the crimping protrusion 27 away from the first half body 25 is the crimping surface, and the crimping surfaces of the multiple crimping protrusions 27 are located in the same plane. After the power module 50 is welded to the heat exchange area 14, the multiple crimping protrusions 27 are respectively ground to form crimping surfaces, and the multiple crimping surfaces are ground to be located in the same plane, so that the multiple crimping protrusions 27 can be pressed against the crimping tool at the same time.

[0084] In order to make the force applied to the first half body 25 uniform during the crimping process of the crimping tool 26, as an embodiment, as shown in FIG. Figure 4 As shown, from the inlet 11 to the outlet 12, the plurality of heat exchange areas 14 are arranged at intervals, and a crimping protrusion 27 is arranged between each two adjacent heat exchange areas 14. Since a crimping protrusion 27 is arranged between each two adjacent heat exchange areas 14, when the crimping tool presses against the plurality of crimping protrusions 27, the force applied to the first half body 25 is uniform.

[0085] It is understandable that, in addition to between each two adjacent heat exchange areas 14, other positions of the first side 251 may also be provided with the crimping protrusions 27 (see Figure 4 ).

[0086] In the process of welding the power module 50 and the heat exchange area 14, in order to prevent the molten solder from flowing out of the welding position and affecting the welding effect of the power module 50 and the heat exchange area 14, as an implementation method, Figure 4 As shown, a plurality of annular protrusions 28 are formed on the main body 10, and the annular protrusions 28 are suitable for being arranged around the corresponding welding positions of the heat exchange area 14 and the power module 50. The annular protrusions 28 can block the molten solder, so as to prevent the molten solder from flowing out of the welding position and affecting the welding effect of the power module 50 and the heat exchange area 14.

[0087] In order to achieve a good welding effect between the power module 50 and the heat exchange area 14, as an implementation method, Figure 4 As shown, the heat exchange area 14 includes a plurality of support bosses 29 arranged at intervals, and the plurality of support bosses 29 are suitable for placing solder parts. The solder parts can be placed on the bosses first, and then the power module 50 can be placed on the solder parts, so that the power module 50 is fully in contact with the solder parts. In this way, before the solder parts are melted, the support bosses 29 can make a gap between the surface of the heat exchange area 14 and the power module 50, and the melted solder parts can fill the gap, that is, after the welding is completed, the solder parts will fully fill the gap between the power module 50 and the heat exchange area 14, so that the power module 50 and the heat exchange area 14 have a good welding effect.

[0088] Alternatively, if Figure 1 As shown, the power module 50 includes multiple power modules 51, and the multiple power modules 51 may include a first power module 52 configured as a U-phase power module 51, a second power module 53 configured as a V-phase power module 51, and a third power module 54 configured as a W-phase power module 51. The first power module 52, the second power module 53, and the third power module 54 are arranged along the direction from the inlet 11 to the outlet 12.

[0089] According to a second aspect of the present disclosure, a motor controller is provided, comprising a motor controller body and the above-mentioned power module 50 , wherein the power module 50 is mounted on the motor controller body.

[0090] It is understandable that, in the present disclosure, the above-mentioned power module 50 can be applied to any other suitable device in addition to the motor controller, for example, high-voltage inverter products such as inverters and high-power frequency converters.

[0091] According to a third aspect of the present disclosure, a vehicle is provided, comprising a vehicle body and the above-mentioned motor controller, wherein the motor controller body is mounted on the vehicle body.

[0092] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0093] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0094] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A heat sink for a power module, characterized in that: It includes a main body and a plurality of heat exchange structures; The main body is provided with an inlet, an outlet, and a flow channel connecting the inlet and the outlet; In the direction from the inlet to the outlet, the plurality of heat exchange structures are sequentially arranged in the flow channel, wherein the flow area of ​​the heat exchange structure located upstream of each two adjacent heat exchange structures in the flow channel is greater than the flow area of ​​the heat exchange structure located downstream; The main body is also provided with a plurality of heat exchange areas suitable for installing power modules, and each of the heat exchange structures is configured to be able to exchange heat with a power module of the power module group through the corresponding heat exchange area.

2. The heat sink according to claim 1, characterized in that: In a direction from the inlet to the outlet, the plurality of heat exchange structures are arranged at intervals.

3. The heat sink according to claim 2, characterized in that: Each of the heat exchange structures comprises a plurality of fins arranged at intervals; The spacing between the multiple fins of the heat exchange structure located upstream of every two adjacent heat exchange structures is greater than the spacing between the multiple fins of the heat exchange structure located downstream, so that the flow area of ​​the flow channel at the heat exchange structure located upstream of every two adjacent heat exchange structures is greater than the flow area of ​​the heat exchange structure located downstream.

4. The heat sink according to claim 3, characterized in that: The multiple fins in each of the heat exchange structures are arranged at equal intervals.

5. The heat sink according to claim 3, characterized in that: One end of the fin is connected to the corresponding heat exchange area, and the other end extends perpendicular to the flow direction of the coolant.

6. The heat sink according to claim 4, characterized in that: The plurality of heat exchange structures include a first heat exchange structure, a second heat exchange structure and a third heat exchange structure; There is a first spacing between the multiple fins in the first heat exchange structure, there is a second spacing between the multiple fins in the second heat exchange structure, and there is a third spacing between the multiple fins in the third heat exchange structure; The ratio of the first spacing, the second spacing and the third spacing is 12:9:7 to 18:15:

13.

7. The heat sink according to claim 4, characterized in that: In a direction from the inlet to the outlet, the plurality of heat exchange zones are arranged at intervals; The multiple heat exchange areas are suitable for corresponding to the multiple power modules of the power module, and each heat exchange area is suitable for exchanging heat with a separate power module.

8. The radiator according to any one of claims 1 to 7, characterized in that: The main body comprises a first half body and a second half body; A concave portion is disposed on a side of the second half body facing the first half body. The first half body is connected to the second half body and defines the flow channel together with the concave portion.

9. The heat sink according to claim 8, characterized in that: The heat sink further includes a sealing ring, which is arranged around the recess and is pressed between the first half body and the second half body.

10. The heat sink according to claim 8, characterized in that The heat sink further includes a fastener, and the first half body is detachably connected to the second half body through the fastener.

11. The heat sink according to claim 9, characterized in that The first half has opposing first and second sides; The plurality of heat exchange areas are located on the first side, and the plurality of heat exchange structures are located on the second side; The first side is provided with a plurality of crimping protrusions, and the plurality of crimping protrusions are suitable for cooperating with a crimping tool to achieve crimping of the first half body and the second half body.

12. The heat sink according to claim 11, characterized in that The end surface of the crimping protrusion away from the first half body is a crimping surface, and the crimping surfaces of the plurality of crimping protrusions are located in the same plane.

13. The heat sink according to claim 11, characterized in that In the direction from the inlet to the outlet, the plurality of heat exchange areas are arranged at intervals, and the crimping protrusion is arranged between every two adjacent heat exchange areas.

14. The radiator according to any one of claims 1 to 7, characterized in that: A plurality of annular protrusions are formed on the main body, and the annular protrusions are suitable for being arranged around corresponding welding positions of the heat exchange area and the power module.

15. The radiator according to any one of claims 1 to 7, characterized in that: The heat exchange area includes a plurality of support bosses arranged at intervals, and the plurality of support bosses are suitable for placing solder parts.

16. A power module, characterized in that: The heat sink comprises at least one power module and a heat sink according to any one of claims 1 to 15, wherein the power module is installed in the heat exchange area.

17. The power module according to claim 16, characterized in that: The power module includes a plurality of power modules, the plurality of power modules include a first power module configured as a U-phase power module, a second power module configured as a V-phase power module, and a third power module configured as a W-phase power module; The first power module, the second power module, and the third power module are arranged along a direction from the inlet to the outlet.

18. A motor controller, characterized in that: It comprises a motor controller body and the power module according to claim 16 or 17, wherein the power module is installed on the motor controller body.

19. A vehicle, characterized in that: It comprises a vehicle body and the motor controller according to claim 18, wherein the motor controller body is mounted on the vehicle body.

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