CN215773963U - Cooling device, motor controller and vehicle - Google Patents

Abstract

The utility model is suitable for the technical field of electronic module cooling, and provides a cooling device, a motor controller and a vehicle. The cooling device comprises a cooling body connected with the electronic module, the cooling body is provided with a cooling cavity for the electronic module to extend into, the cooling body is provided with a liquid inlet and a liquid outlet, a fin rib which can be matched with the electronic module to form a sub-channel is arranged in the cooling cavity, and two ends of the sub-channel are respectively communicated with the liquid inlet and the liquid outlet. The motor controller and the vehicle have the cooling device described above. According to the cooling device, the motor controller and the vehicle provided by the utility model, the fin ribs which can be matched with the electronic modules to form the sub-channels are arranged in the cooling body, the cooling liquid flows through the single electronic modules in parallel through the sub-channels, the heat is taken out in parallel, the heat dissipation is balanced, the heat dissipation effect is better, the service life of the electronic modules is prolonged, and the performance stability of the electronic modules is ensured.

Description

Cooling device, motor controller and vehicle

Technical Field

The utility model belongs to the technical field of electronic module cooling, and particularly relates to a cooling device, a motor controller and a vehicle.

Background

Most of existing electronic modules, such as SiC modules (silicon carbide power modules), adopt a serial cooling method, so that the heat generated by the cooling liquid from the first SiC module, which is serially connected with all the SiC modules through which water flows, is finally collected to the last group of SiC modules close to the water outlet, so that the heat dissipation is unbalanced and the heat dissipation effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a cooling device, a motor controller and a vehicle, which have balanced heat dissipation and good heat dissipation effect.

The technical scheme of the utility model is as follows: a cooling device comprises a cooling body connected with an electronic module, wherein the cooling body is provided with a cooling cavity for the electronic module to stretch into, the cooling body is provided with a liquid inlet and a liquid outlet, a fin rib which can be matched with the electronic module to form a sub-channel is arranged in the cooling cavity, and two ends of the sub-channel are respectively communicated with the liquid inlet and the liquid outlet.

Optionally, the fin ribs include at least two first fin ribs, each of the first fin ribs is close to the liquid inlet and spaced apart from the liquid inlet, and one end of each of the first fin ribs facing the liquid inlet is provided with a blade structure.

Optionally, the first fin rib is in a form of an elbow with a circular arc transition or in a form of an arc.

Optionally, the fin ribs further include at least two second fin ribs, each of the second fin ribs and each of the first fin ribs being located on both sides of the electronic module.

Optionally, the second fin rib is U-shaped or arcuate.

Optionally, the electronic modules are arranged at intervals and divided into two groups, one end of the first group of electronic modules is close to or closely attached to one end of the first fin rib far away from the liquid inlet, and the other end of the first group of electronic modules is close to or closely attached to the first end of the second fin rib; the second end of the second fin rib is close to or closely attached to one end of the second group of electronic modules, and the other end of the second group of electronic modules faces the liquid outlet.

Optionally, a sink groove is arranged in the cooling cavity near the liquid outlet, and an inclined plane is arranged on one side of the sink groove far away from the liquid outlet.

Optionally, a first section of sub-channels are formed between adjacent first fin ribs, a second section of sub-channels are longitudinally arranged and formed between adjacent electronic modules of the first group at intervals, a third section of sub-channels are formed between adjacent second fin ribs, a fourth section of sub-channels are longitudinally arranged and formed between adjacent electronic modules of the second group at intervals, the first section of sub-channels are in butt joint with the second section of sub-channels, and the third section of sub-channels are in butt joint with the fourth section of sub-channels.

Optionally, the cooling body includes a seat body and a fixing plate, the fixing plate is connected to the seat body through a locking member, and the seat body and the fixing plate surround to form the cooling cavity; the electronic module penetrates through the fixing plate, and the fin ribs are integrally formed or fixedly connected with the base body or the fixing plate.

Optionally, the fin rib is integrally formed or fixedly connected to the seat body, an upper end surface of the fin rib is lower than an upper end surface of the seat body, and a protruding step abutting against the upper end surface of the fin rib is arranged on one side of the fixing plate facing the seat body.

Optionally, a sealing element is arranged between the fixing plate and the seat body, an annular groove is arranged on one surface of the seat body facing the fixing plate, and the sealing element is connected to the annular groove and is compressed by the fixing plate;

and/or the fixing plate is connected with the seat body in a welding manner or provided with a sealant.

Optionally, the liquid inlet and the liquid outlet are respectively arranged at two adjacent sides of the seat body, a division bar located at the liquid inlet and the liquid outlet is arranged in the cooling cavity, and the division bar is close to or closely attached to one of the electronic modules;

or/and the liquid inlet and the liquid outlet are close to one end of the cooling cavity and are horn-shaped.

Optionally, at least one of a reinforcing rib, a heat dissipation fin and a barrier structure is arranged on the outer side of the cooling body;

and/or the cooling cavity and the fin rib are provided with demoulding slopes.

The utility model also provides a motor controller which is provided with the cooling device.

Optionally, the electronic module is an IGBT module and is provided with a plurality of the IGBT modules, and the IGBT modules are longitudinally adjacent to each other and spaced apart from each other.

The utility model also provides a vehicle, which is provided with the cooling device; alternatively, the vehicle has a motor controller as described above.

According to the cooling device, the motor controller and the vehicle provided by the utility model, the fin ribs which can be matched with the electronic modules to form the sub-channels are arranged in the cooling body, the fin ribs can divide the cooling liquid, the cooling liquid flows through a single electronic module (a power module, such as an IGBT module) in parallel through the sub-channels, the heat is taken out in parallel, the heat dissipation is balanced, the heat dissipation effect is better, the service life of the electronic module is favorably prolonged, and the performance stability of the electronic module is favorably ensured.

Drawings

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

FIG. 1 is an exploded perspective view of a cooling device according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a base of a cooling device according to an embodiment of the present invention;

FIG. 3 is a schematic coolant flow diagram of a cooling apparatus according to an embodiment of the present invention;

fig. 4 is a partial perspective view of a seat body of a cooling device according to an embodiment of the present invention;

fig. 5 is another partial perspective view of a seat body of a cooling device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

As shown in fig. 1 to fig. 3, a cooling device according to an embodiment of the present invention may be used for cooling an electronic module or other devices, and in this embodiment, the cooling device is applied to the electronic module as an example, and includes a cooling body 10 connected to the electronic module 90. Cooling body 10 has the confession cooling chamber 101 that electronic module 90 stretched into, cooling body 10 is provided with inlet 121 and liquid outlet 122, be provided with in cooling chamber 101 can with electronic module 90 cooperates the fin rib that forms the subchannel, the both ends of subchannel respectively with inlet 121 with liquid outlet 122 communicates with each other, and like this, the fin rib can be used for shunting the coolant liquid, and electronic module 90's both sides can be the subchannel, can adopt parallelly connected mode to make each electronic module 90's two sides cool off through the coolant liquid of the subchannel of flowing through, and its cooling effect is good, has avoided the coolant liquid to establish ties each electronic module 90 in proper order and has leaded to the defect such as thermal resistance too big, and the heat dissipation is balanced, and the radiating effect is good, does benefit to and reduces the energy consumption and guarantees electronic module 90's performance stability.

Specifically, the fin ribs include at least two first fin ribs 131, each first fin rib 131 is close to the liquid inlet 121 and is arranged at an interval, as shown in fig. 4, one end of the first fin rib 131 facing the liquid inlet 121 is provided with a knife-edge structure, that is, the wall thickness of one end of the first fin rib 131 close to the liquid inlet 121 is relatively thin, the flow dividing effect is good, and the flow resistance of the cooling liquid is favorably reduced.

Specifically, the first fin rib 131 may have an elbow shape (L-shape) with a circular transition or an arc shape, but in a specific application, the first fin rib 131 may have other suitable shapes, such as a straight shape, an S-shape, etc., which may be set according to practical situations.

Specifically, the fin rib further includes at least two second fin ribs 132, and each of the second fin ribs 132 and each of the first fin ribs 131 are located on both sides of the electronic module 90 to form a plurality of shunt channels connected in parallel.

Specifically, as shown in fig. 5, the second fin rib 132 may have a U-shape, an arc shape, or the like, but in a specific application, the second fin rib 132 may have other suitable shapes, such as a straight line shape, an S-shape, or the like, which may be set according to practical situations.

Specifically, each of the electronic modules 90 is disposed at intervals and divided into two groups, i.e., a left group and a right group, and the electronic modules 90 may be power modules. In this embodiment, the electronic modules 90 are disposed at intervals along a straight line, the first fin rib 131 is in a polygonal shape with an arc transition, and the second fin rib 132 is in a U shape. Wherein one end of the first set of electronic modules 90 is close to or closely attached to one end of the first fin rib 131 away from the liquid inlet 121, and the other end of the first set of electronic modules 90 is close to or closely attached to the first end of the second fin rib 132; the first set of said electronic modules 90 and the second set of said electronic modules 90 each comprise a plurality of electronic modules 90, respectively. The second end of the second fin rib 132 is close to or closely attached to one end of the second group of the electronic modules 90, the other end of the second group of the electronic modules 90 faces the liquid outlet 122, and the cooling liquid is divided by the first fin rib 131 after entering from the liquid inlet 121, and flows out of the liquid outlet 122 after sequentially flowing through the two sides of the first group of the electronic modules 90, the second fin rib 132 and the second group of the electronic modules 90.

Specifically, a sinking groove 102 may be disposed in the cooling cavity 101 near the liquid outlet 122, and a slope 103 is disposed on a side of the sinking groove 102 away from the liquid outlet 122. The bevel angle of the bevel 103 may be 10 to 30 degrees, for example 20 to 30 degrees, preferably 23.5 °.

Specifically, a first section of branch channel 141 is formed between adjacent first fin ribs 131, a second section of branch channel 142 is longitudinally arranged and formed between a first group of adjacent electronic modules 90 at intervals, a third section of branch channel 143 is formed between adjacent second fin ribs 132, and a fourth section of branch channel 144 is longitudinally arranged and formed between a second group of adjacent electronic modules 90 at intervals, wherein the branch channels include the first section of branch channel 141, the second section of branch channel 142, the third section of branch channel 143 and the fourth section of branch channel 144 which are sequentially butted. After entering from the liquid inlet 121, the cooling liquid flows through the first-stage branch channel 141, the second-stage branch channel 142, the third-stage branch channel 143, and the fourth-stage branch channel 144 in sequence, enters the region of the sink tank 102, and flows out from the liquid outlet 122.

Specifically, the cooling body 10 includes a seat body 11 and a fixing plate 12, and the seat body 11 and the fixing plate 12 may be made of a metal material, such as copper-zinc alloy or aluminum alloy, which has good thermal conductivity. The fixing plate 12 can be connected to the base 11 through a locking member 15, and the locking member 15 can be a screw, a bolt, etc. The base body 11 and the fixing plate 12 surround to form the cooling cavity 101; the electronic module 90 passes through the fixing plate 12, the electronic module 90 can be inserted into the cooling chamber 101, and the electronic module 90 is sealed with the fixing plate 12. The fin ribs (the first fin rib 131 and the second fin rib 132) may be integrally formed or fixedly connected to the base body 11, or the fin ribs (the first fin rib 131 and the second fin rib 132) may be integrally formed or fixedly connected to the fixing plate 12, which is beneficial to ensuring the heat conduction effect.

Specifically, the fin ribs are integrally formed or fixedly connected to the seat body 11, and in this embodiment, the fin ribs may be integrally formed on the bottom surface of the cooling cavity 101 of the seat body 11, so that the heat conduction effect is good.

Specifically, the upper end surface of the fin rib is lower than the upper end surface of the seat body 11, and a protruding step (not shown) abutting against the upper end surface of the fin rib is disposed on one side of the fixing plate 12 facing the seat body 11, so as to facilitate assembly to ensure a sealing effect between the fixing plate 12 and the seat body 11.

Specifically, a sealing element 16 is disposed between the fixing plate 12 and the seat body 11, an annular groove 123 is disposed on a surface (upper end surface) of the seat body 11 facing the fixing plate 12, the sealing element 16 is connected to the annular groove 123 and is compressed by the fixing plate 12, and the sealing element 16 may be a rubber sealing ring or the like.

Specifically, the fixing plate 12 and the seat body 11 may be welded or provided with a sealant, and the adhesion or the welding sealing by the sealant is favorable for improving the sealing property.

Specifically, the liquid inlet 121 and the liquid outlet 122 are respectively disposed on two adjacent sides of the seat body 11, a dividing bar 133 located on the liquid inlet 121 and the liquid outlet 122 is disposed in the cooling cavity 101, and the dividing bar 133 is close to or closely attached to one of the electronic modules 90 (the centered electronic module 90), so as to prevent the cooling liquid from being directly discharged from the liquid inlet 121 to the liquid outlet 122. In a specific application, the liquid inlet 121 and the liquid outlet 122 may also be provided with two or more, the arrangement of the fin ribs may also be set according to an actual situation, multiple component runners may be formed in one cooling body 10, and each component runner may include multiple runner runners.

Specifically, the liquid inlet 121 and the liquid outlet 122 are close to one ends 125 and 126 of the cooling cavity 101, which are in a trumpet shape, so that the flow guiding effect is good, and the cooling effect is improved.

In a specific application, at least one of a reinforcing rib, a heat dissipation fin and a blocking structure may be disposed on the outer side of the cooling body 10 to meet different use requirements.

Specifically, the cooling cavity 101 and the fin rib may be provided with a draft angle to facilitate the production process.

In this embodiment, the sub-channels in the cooling device are two-sided direct cooling water channels, the distance between the left and right surfaces of the seat body 11 can be 165.5mm, and the distance between the front and rear end surfaces can be 125.5 mm; the distance between the top and bottom surfaces may be 32.5 mm.

The base body 11 can be formed by a die-casting aluminum forming process, the wall thickness of the base body can be 2.5mm, the side wall of the cooling cavity 101 is provided with a pattern drawing oblique angle (pattern drawing inclination) not less than 1 degree, the requirement of pattern drawing ejection is met, and the inner angle part of the cooling cavity 101 is provided with fillet transition, so that the requirement on mechanical strength is met, and the flow guide guiding effect can be played. The depth of the sink groove 102 is greater than that of the cooling cavity 101, and the bottom of the sink groove 102 is connected with the bottom 1011 of the cooling cavity 101 through the inclined plane 103 forming 23.5 degrees with the horizontal plane, so that the relation between the water pressure of inlet water and the flow rate can be relieved, and the cooling liquid can be better guided to effectively flush the upper part of the power module.

The inner sides of the liquid inlet 121 and the liquid outlet 122 are designed with horn-shaped structures, which is beneficial to reducing flow resistance; the joint parts of the liquid inlet 121 and the liquid outlet 122 can lead out interfaces with the length of 25mm, the outer diameter of the pipe orifice can meet the requirement of an embedded cooling pipe joint with the diameter of less than 20mm, and the external structure can meet the requirement of a clamping type cooling pipe joint with the inner diameter of more than 25mm through a machining mode; from the liquid outlet 122 to the direction of the fin rib, the lengths of the sinking groove 102 and the inclined plane 103 may be 21.5mm, the distance between the fin rib top surface 105 and the top surface of the seat body 11 may be 2mm, and the top surface of the seat body 11 is provided with a threaded hole 124 for installing the fixing plate 12. The first fin rib 131 plays a role of a flow dividing guide; the second fin rib 132 guides the diversion channel rib. In specific applications, the peripheral dimensions, materials, and structural features of the cooling body 10 are not limited to this embodiment, and the cooling body 10 may be used as a part of a box of an apparatus according to design requirements and then be matched with peripheral components and flexibly customized (i.e., the design dimensions are changed as required); the fixing plate 12 may be made of copper-zinc alloy, which has better heat conductivity, and other materials with the same mechanical properties and good welding performance requirements may be selected in consideration of the assembly requirements. The liquid inlet 121 may be connected to a water inlet elbow joint 126, and the shape, structural material, size, etc. are not limited to this embodiment, and joints of different shapes and different materials may be selected according to design requirements; the liquid outlet 122 may be connected to a water outlet elbow joint 127, the shape, structural material, size, etc. are not limited to this embodiment, and joints of different shapes and different materials may be selected according to design requirements; the locking member 15 can be a hexagon screw, the specification of which is not limited to this embodiment, and a standard fastener can be selected according to design requirements or sealing effect and welding assembly are considered; the electronic module 90 is a double-sided direct-cooling power module; the selection of the sealing ring is not limited to the embodiment, and an O-shaped sealing ring, a flat sealing ring and the like can be selected according to design requirements.

As shown in fig. 3, a schematic view of the water transport of the cooling liquid through the cooling body 10; according to the arrow, the coolant is indicated to flow from the diversion water channel to the water outlet through the water inlet, the liquid inlet 121 and the liquid outlet 122 form a 90-degree angle, and the water inlet area and the water outlet area are divided into half and half equally, wherein the water inlet area is divided into four first-section diversion channels 141 by three first fin ribs 131. The cooling liquid enters the four first-stage sub-channels 141 from the water inlet, flows to the second-stage sub-channels 142 formed between the double-sided direct-cooling power modules respectively to ensure the timeliness and the balance of heat dissipation, then enters the four third-stage sub-channels 143 formed between the three second fin ribs 132, then flows to the fourth-stage sub-channels 144 formed between the other part of double-sided direct-cooling power modules, finally is collected to the water outlet area (the sink 102 area) and then is discharged from the liquid outlet 122, and the cooling liquid can enter the circulation from the liquid inlet 121 after passing through the circulating pump and the outer radiator.

In the specific application, the wall thickness of the first fin rib 131 at the liquid inlet 121 is thinner at the end part close to the liquid inlet 121, the minimum wall thickness can be 0.7mm, the water flow breaking effect is good, and the corner part of each rib is subjected to transition fillet treatment. To ensure good de-molding and machining, each first fin rib 131 is designed with a draft angle of 1-2 degrees, the edges are chamfered and deburred.

The first fin rib 131 and the second fin rib 132 are designed correspondingly, and the distance from the upper end surface of the base body 11 to the first fin rib 131 can be 2mm, so as to meet the requirement of assembling the power module. The top surface design of pedestal 11 has ring channel 123 (sealed gluey groove), can be according to the demand, selects waterproof sealing circle and fills sealed gluey when assembly fixing plate 12 makes up, satisfies gas tightness and waterproof requirement.

Embodiments of the present invention also provide a motor controller having the above-described cooling device for the electronic module 90.

Specifically, the electronic module 90 may be an IGBT (insulated Gate Bipolar transistor) module and is provided with a plurality of IGBT modules, and each of the IGBT modules is longitudinally adjacent to and spaced from each other, so as to facilitate avoiding stray inductance and improve utilization rate of output current.

Embodiments of the present invention also provide a vehicle having a cooling device for an electronic module 90 as described above; alternatively, the vehicle has a motor controller as described above.

According to the cooling device, the motor controller and the vehicle for the electronic module 90, fin ribs which can be matched with the electronic module 90 to form sub-channels are arranged in the cooling body 10, the fin ribs can divide cooling liquid, the cooling liquid flows through the single electronic module 90 (a power module, such as an IGBT module) in parallel through the sub-channels, heat is taken out in parallel, heat dissipation is balanced, the heat dissipation effect is better, the service life of the electronic module 90 is prolonged, and the performance stability of the electronic module 90 is guaranteed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (16)

1. The cooling device is characterized by comprising a cooling body connected with an electronic module, wherein the cooling body is provided with a cooling cavity for the electronic module to stretch into, the cooling body is provided with a liquid inlet and a liquid outlet, a fin rib which can be matched with the electronic module to form a sub-channel is arranged in the cooling cavity, and two ends of the sub-channel are respectively communicated with the liquid inlet and the liquid outlet.

2. A cooling apparatus as claimed in claim 1, wherein said fin ribs include at least two first fin ribs, each of said first fin ribs being spaced adjacent said inlet, said first fin ribs being provided with a knife edge formation at an end thereof facing said inlet.

3. A cooling device as claimed in claim 2, wherein said first fin rib is angled or curved in the transition of the arc.

4. A cooling device as claimed in claim 2, wherein said fin ribs further comprise at least two second fin ribs, each of said second fin ribs and each of said first fin ribs being located on both sides of said electronic module.

5. A cooling device as claimed in claim 4, wherein said second fin rib is U-shaped or arcuate.

6. The cooling apparatus as claimed in claim 4, wherein the electronic modules are spaced apart and divided into two groups, one end of the electronic module of the first group being close to or abutting against an end of the first fin rib remote from the inlet, and the other end of the electronic module of the first group being close to or abutting against a first end of the second fin rib; the second end of the second fin rib is close to or closely attached to one end of the second group of electronic modules, and the other end of the second group of electronic modules faces the liquid outlet.

7. The cooling apparatus as claimed in claim 6, wherein a sink is provided in the cooling chamber adjacent to the outlet, and a slope is provided on a side of the sink remote from the outlet.

8. The cooling device as claimed in claim 4, wherein a first section of sub-channels are formed between adjacent first fin ribs, a first group of adjacent electronic modules are longitudinally spaced apart and formed with a second section of sub-channels, a third section of sub-channels are formed between adjacent second fin ribs, a second group of adjacent electronic modules are longitudinally spaced apart and formed with a fourth section of sub-channels, the first section of sub-channels are in butt joint with the second section of sub-channels, and the third section of sub-channels are in butt joint with the fourth section of sub-channels.

9. A cooling device as claimed in any one of claims 1 to 8, wherein said cooling body comprises a housing and a fixing plate, said fixing plate is connected to said housing by a locking member, said housing and said fixing plate surround to form said cooling chamber; the electronic module penetrates through the fixing plate, and the fin ribs are integrally formed or fixedly connected with the base body or the fixing plate.

10. The cooling device as claimed in claim 9, wherein the fin rib is integrally formed or fixedly connected to the housing, an upper end surface of the fin rib is lower than an upper end surface of the housing, and a side of the fixing plate facing the housing is provided with a protruding step abutting against the upper end surface of the fin rib.

11. A cooling device as claimed in claim 9, wherein a sealing member is disposed between said fixing plate and said housing, a side of said housing facing said fixing plate is provided with an annular groove, and said sealing member is connected to said annular groove and pressed by said fixing plate;

and/or the fixing plate is connected with the seat body in a welding manner or provided with a sealant.

12. The cooling device as claimed in claim 9, wherein the liquid inlet and the liquid outlet are respectively disposed at two adjacent sides of the base, a partition bar is disposed in the cooling cavity and located at the liquid inlet and the liquid outlet, and the partition bar is close to or attached to one of the electronic modules;

or/and the liquid inlet and the liquid outlet are close to one end of the cooling cavity and are horn-shaped.

13. A cooling device as claimed in any one of claims 1 to 8, wherein the outside of the cooling body is provided with at least one of ribs, fins and dam structures;

and/or the cooling cavity and the fin rib are provided with demoulding slopes.

14. A motor controller having a cooling device as claimed in any one of claims 1 to 13.

15. The motor controller of claim 14 wherein said electronic modules are IGBT modules and are provided in plurality, each of said IGBT modules being longitudinally adjacent and spaced apart.

16. A vehicle, characterized in that it has a cooling device according to any one of claims 1 to 13; alternatively, the vehicle has a motor controller as claimed in claim 14 or 15.

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