CN112277608A

CN112277608A - Wheel hub motor cooling system and vehicle

Info

Publication number: CN112277608A
Application number: CN202011017842.XA
Authority: CN
Inventors: 邹城; 秦博; 刘春强; 张泽阳; 赵春来
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-01-29

Abstract

The invention relates to a wheel hub motor cooling system and a vehicle, comprising: a first radiator in which a coolant is provided; the motor controller pumps the cooling liquid in the first radiator into the motor controller through a water pump; the hub motor is communicated with the motor controller through a first water pipe; and the second radiator is arranged on the first water pipe and used for radiating the cooling liquid flowing out of the motor controller. The invention relates to a hub motor heat dissipation system which can achieve better heat dissipation of a hub motor and meet the working requirements of the hub motor.

Description

Wheel hub motor cooling system and vehicle

Technical Field

The invention relates to the technical field of automobile parts and equipment, in particular to a hub motor cooling system and a vehicle.

Background

The hub motor drive is characterized in that a motor is arranged in a rim of an automobile, wheels are directly driven by the motor, a traditional transmission device is omitted, and the hub motor drive is one of important development directions of new energy automobiles.

In the related technology, most of the motors used for carrying new energy passenger vehicles are outer rotor hub motors, and direct in-wheel driving is adopted, so that transmission parts are omitted, the transmission structure is simple, and the driving mode is flexible; in order to improve the power density and the torque density of the motor, the existing hub motor mostly adopts a three-phase alternating current permanent magnet synchronous motor, but because the prior neodymium iron boron permanent magnet technology is limited, demagnetization can be started at about 180 ℃, and therefore the hub motor needs to be radiated.

However, since the driving condition of the vehicle is complex, particularly when heavy loads climb a long slope, the temperature rise is rapid, although the maximum temperature rise and a certain safety factor are considered in the design of the hub motor, the uncertainty in actual use and the performance attenuation of parts and materials are also influenced by different roads and extreme environments, the situation that the design is not consistent with the actual situation often occurs, and the good heat dissipation of the hub motor cannot be achieved.

Disclosure of Invention

The embodiment of the invention provides a hub motor heat dissipation system and a vehicle, and aims to solve the problem that the hub motor cannot be well dissipated when the hub motor is actually used in the related art.

In a first aspect, a heat dissipation system for an in-wheel motor is provided, comprising: a first radiator in which a coolant is provided; the motor controller pumps the cooling liquid in the first radiator into the motor controller through a water pump; the hub motor is communicated with the motor controller through a first water pipe; and the second radiator is arranged on the first water pipe and used for radiating the cooling liquid flowing out of the motor controller.

In some embodiments, the second heat sink includes a main body and a plurality of heat pipes disposed on the main body, and the cooling fluid flowing from the motor controller flows into the hub motor through the heat pipes.

In some embodiments, the outer surface of the radiating pipe has spiral fins, and the inside of the radiating pipe has perforations extending straight through the radiating pipe, the perforations being penetrated by a cooling fluid.

In some embodiments, the heat pipe includes: the metal pipes are positioned on the inner layer, the cross sections of the metal pipes are the same, and the metal pipes form the through holes; the fins are fixed outside the metal tube.

In some embodiments, the metal tube is a thin stainless steel tube, and the fins are formed by spin extrusion of an aluminum tube and are fixed to the metal tube by extrusion.

In some embodiments, the main body includes water chambers at two ends of the radiating pipe, each of the water chambers is provided with a plurality of through holes, the plurality of through holes communicate the plurality of radiating pipes with the water chamber, and one end of the water chamber, which is far away from the radiating pipe, communicates with the first water pipe.

In a second aspect, a vehicle is provided, characterized by comprising: the hub motor cooling system is provided.

In some embodiments, the vehicle further comprises a torsion beam suspension to which the second radiator is fixed.

In some embodiments, an axial direction of the second radiator is perpendicular to a traveling direction of the vehicle.

In some embodiments, a support bracket is fixedly arranged on the torsion beam suspension, and the second heat sink is fixed to the support bracket through an upper compression ring and a lower compression ring.

The technical scheme provided by the invention has the beneficial effects that:

the embodiment of the invention provides a hub motor heat dissipation system and a vehicle, wherein a first radiator is internally provided with cooling liquid, the cooling liquid in the first radiator can be pumped into a motor controller through a water pump, and the motor controller can be communicated with a hub motor through a first water pipe, so that the cooling liquid in the first radiator can be conveyed to the hub motor to dissipate heat of the hub motor.

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 description of the embodiments will be briefly introduced 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 to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a heat dissipation system for an in-wheel motor according to an embodiment of the present invention;

FIG. 2 is a logic diagram of a heat dissipation system for an in-wheel motor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second heat sink of a heat dissipation system of an in-wheel motor according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a second heat sink;

FIG. 5 is a schematic view of a heat pipe of a second heat sink;

fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.

In the figure: 1. a first heat sink; 2. PDU/DCDC/OBC three-in-one; 3. a hub motor; 31. a left hub motor; 32. a right hub motor; 4. a first water pipe; 5. a second heat sink; 51. a main body; 511. a water chamber; 52. a radiating pipe; 521. a fin; 522. a metal tube; 523. perforating; 6. a torsion beam suspension; 61. a support bracket; 62. pressing a ring; 63. a lower pressure ring; 64. projection welding of nuts; 65. a bolt; 66. a rubber bushing; 7. a motor controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The embodiment of the invention provides a hub motor heat dissipation system and a vehicle, which can solve the problem that the hub motor cannot be well dissipated when the hub motor is actually used in the related art.

Referring to fig. 1 and 2, a heat dissipation system for an in-wheel motor according to an embodiment of the present invention may include: a first radiator 1 in which a coolant is provided; a motor controller 7 for pumping the coolant in the first radiator 1 into the motor controller 7 by a water pump; the hub motor 3 is communicated with the motor controller 7 through a first water pipe 4; and the second radiator 5 is arranged on the first water pipe 4 between the motor controller 7 and the hub motor 3 and used for radiating the cooling liquid flowing out of the motor controller 7.

Referring to fig. 1 and 2, specifically, the first heat sink 1 may be connected to a water pump through a short water pipe, and the water pump may be connected to the motor controller 7 through a long water pipe, so that the coolant in the first heat sink 1 may enter the motor controller 7 through the water pump to dissipate heat of the motor controller 7.

Referring to fig. 1, in some embodiments, the water pump may be connected to the PDU/DCDC/OBC triple-in-one 2 (i.e., the PDU/DCDC/OBC triple-in-one 2 integrates the power distribution unit PDU, the converter DCDC, and the vehicle-mounted charger OBC) through a short water pipe, and the PDU/DCDC/OBC triple-in-one 2 is connected to the motor controller 7 through a long water pipe, so that the cooling liquid is pumped into the PDU/DCDC/OBC triple-in-one 2, and the PDU/DCDC/OBC triple-in-one 2 dissipates heat, and then enters the motor controller 7 through the long water pipe.

Referring to fig. 1, in some alternative embodiments, the first water pipe 4 may be divided into two sections, the second heat sink 5 may be integrally sandwiched between the two sections of the first water pipe 4, the second heat sink 5 may include a main body 51, two ends of the main body 51 may have openings, so that the second heat sink 5 may communicate with the two sections of the first water pipe 4, and the second heat sink 5 may further include a plurality of heat dissipation pipes 52 disposed on the main body 51, and the cooling liquid flowing from the motor controller 7 may flow into the in-wheel motor 3 through the heat dissipation pipes 52, so that the cooling liquid passes through the heat dissipation pipes 52, and the cooling liquid may be surrounded by the heat dissipation pipes 52 all around, so that the cooling liquid dissipates heat faster; in other embodiments, the second radiator 5 may be disposed outside the first water pipe 4 and closely attached to the first water pipe 4 to cool the coolant in the first water pipe 4; the second radiator 5 is simple in structure, is directly mounted on the first water pipe 4, and is convenient to mount, clean and dismount.

Referring to fig. 3, 4 and 5, in some embodiments, the outer surface of the radiating pipe 52 may have a spiral fin 521, and the inner portion of the radiating pipe 52 has a through hole 523 that linearly penetrates through the radiating pipe 52, and the through hole 523 is used for the cooling liquid to pass through, that is, the radiating pipe 52 may be integrally formed with the fin 521, or the fin 521 may be separately formed and then fixed to the radiating pipe 52, and by adding the spiral fin 521, the contact area between the radiating pipe 52 and the air may be greatly increased, so as to achieve rapid heat dissipation, and the through hole 523 used for the cooling liquid to pass through in the radiating pipe 52 is designed to be linear, so as to facilitate the cooling liquid to smoothly flow through the radiating pipe 52, and reduce the resistance.

Referring to fig. 3, 4 and 5, in some alternative embodiments, the radiating pipe 52 may include a metal pipe 522 located at an inner layer, the cross section of the metal pipe 522 may be the same, and the metal pipe 522 may form a perforation 523 inside the radiating pipe 52; the fins 521 can be separately fixed outside the metal tube 522, the metal tube 522 and the fins 521 can be formed separately, the forming is easier, and the metal tube 522 with smooth inner wall and thin wall can be manufactured, so that the total thickness and weight of the metal tube 522 and the fins 521 are smaller.

Referring to fig. 3, 4 and 5, preferably, the metal tube 522 may be a stainless steel thin tube, the fins 521 may be formed by rotating and extruding an aluminum tube, and are fixed to the metal tube 522 by extrusion, that is, when the heat dissipation tube 52 is formed, the aluminum tube may be sleeved outside the processed stainless steel thin tube, and then the aluminum tube and the stainless steel thin tube are closely attached together by rotating and extruding, and at the same time, the spiral fins 521 are also formed, the metal tube 522 of the inner layer is a stainless steel thin tube, so that the internal rigidity of the heat dissipation tube 52 is better, and the external fins 521 are made of aluminum alloy, so that the heat dissipation performance is better.

Referring to fig. 3 and 4, in some embodiments, the body 51 may include water chambers 511 at both ends of the radiating pipes 52, each water chamber 511 is provided with a plurality of through holes communicating the plurality of radiating pipes 52 with the water chamber 511, so that the coolant flowing out of the plurality of radiating pipes 52 enters the water chamber 511 having a large cross section, the flow rate of the coolant is reduced, and thus the flow resistance loss of the coolant is reduced; and the end of the water chamber 511 away from the radiating pipe 52 can communicate with the first water pipe 4, since the water chamber 511 is added, the water chamber 511 can store a portion of the cooling liquid, and thus the first water pipe 4 communicating with the second radiator 5 can be designed to be thinner.

Referring to fig. 1 and 2, in the present embodiment, the number of the hub motors 3 is two, wherein a left hub motor 31 and a right hub motor 32 are provided, and the coolant flowing out from the motor controller 7 can be divided into two branches, i.e., a left branch and a right branch, and specifically, the motor controller 7 can be connected to the left hub motor 31 through a first water pipe 4 and connected to the right hub motor 32 through another first water pipe 4, so that the coolant flowing out from the motor controller 7 enters the left hub motor 31 and the right hub motor 32 at the same time to dissipate heat.

Referring to fig. 1, in some embodiments, the cooling fluid entering the left hub motor 31 and the right hub motor 32 respectively may flow into the first radiator 1 for heat dissipation by circulation after passing through the left hub motor 31 and the right hub motor 32.

Referring to fig. 6, an embodiment of the present invention further provides a vehicle, which may include the in-wheel motor heat dissipation system.

Referring to fig. 1 and 6, in some embodiments, the vehicle may further include a torsion beam suspension 6, and the second radiator 5 may be fixed to the torsion beam suspension 6, and since the torsion beam suspension 6 is in a state of swinging all the time during the vehicle traveling, and the second radiator 5 is fixed to the torsion beam suspension 6, it may be ensured that the second radiator 5 moves synchronously with the torsion beam suspension 6, and exchanges heat with the second radiator 5 depending on the wind during the vehicle traveling, and the second radiator is placed on the torsion beam suspension 6, not only is the air flow rate fast, but also the air is less affected by the ambient temperature, the heat exchange efficiency is high, and the reliability of the heat exchange may be ensured.

Referring to fig. 1 and 6, preferably, the axial direction of the second radiator 5 may be perpendicular to the driving direction of the vehicle, so that the area of the radiating pipe 52 facing the wind flowing direction is larger, heat exchange can be better performed, and heat dissipation is more facilitated during driving.

Referring to fig. 6, in some embodiments, a support bracket 61 may be fixedly disposed on the torsion beam suspension 6, and the second heat sink 5 may be fixed on the support bracket 61 by an upper press ring 62 and a lower press ring 63; specifically, the support bracket 61 may be fixedly provided with a projection welding nut 64, an end portion of the second heat sink 5 may be clamped between the upper press ring 62 and the lower press ring 63, and then sequentially pass through the upper press ring 62 and the lower press ring 63 through a bolt 65, and be locked with the projection welding nut 64 on the support bracket 61, so that the second heat sink 5 and the torsion beam suspension 6 move synchronously, and the second heat sink 5 can be detached and cleaned at any time.

Referring to fig. 6, in some alternative embodiments, a rubber bushing 66 may be sleeved on an end portion of the second heat sink 5, and the rubber bushing 66 is also sandwiched between the upper pressing ring 62 and the lower pressing ring 63, so that the second heat sink 5 does not directly contact with the upper pressing ring 62 and the lower pressing ring 63, and the abrasion of the second heat sink 5 is reduced.

The principles of the hub motor cooling system and the vehicle provided by the embodiment of the invention are as follows:

since the coolant is provided in the first radiator 1, and the coolant in the first radiator 1 can be pumped into the motor controller 7 by the water pump, the motor controller 7 can be communicated with the hub motor 3 through the first water pipe 4, so that the cooling liquid in the first radiator 1 can be conveyed to the hub motor 3, the heat of the hub motor 3 is dissipated, meanwhile, because the second radiator 5 is arranged on the first water pipe 4, the second radiator 5 can further dissipate the heat of the cooling liquid flowing out of the motor controller 7 and ready to enter the hub motor 3, the cooling liquid flowing out of the motor controller 7 is prevented from being high in temperature and generating adverse effect on the hub motor 3, the temperature of the cooling liquid at the inlet of the hub motor 3 is reduced, therefore, the higher heat dissipation requirement of the hub motor 3 under the complex working condition can be met, and the reliability of the heat exchange of the hub motor 3 is ensured; meanwhile, the inlet cooling liquid temperature of the hub motor 3 is lower, and the peak torque and the duration of the hub motor 3 can be higher.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An in-wheel motor cooling system, its characterized in that, it includes:

a first radiator (1) in which a coolant is provided;

a motor controller (7) for pumping the coolant in the first radiator (1) into the motor controller (7) by a water pump;

the hub motor (3) is communicated with the motor controller (7) through a first water pipe (4);

and the second radiator (5) is arranged on the first water pipe (4) and used for radiating the cooling liquid flowing out of the motor controller (7).

2. The in-wheel motor heat dissipation system of claim 1, wherein:

the second radiator (5) comprises a main body (51) and a plurality of radiating pipes (52) arranged on the main body (51), and cooling liquid flowing out of the motor controller (7) flows into the hub motor (3) through the radiating pipes (52).

3. The in-wheel motor heat dissipation system of claim 2, wherein:

the outer surface of the heat radiating pipe (52) is provided with a spiral fin (521), and the interior of the heat radiating pipe (52) is provided with a perforation hole (523) which penetrates through the heat radiating pipe (52) along a straight line, and the perforation hole (523) is used for cooling liquid to pass through.

4. The in-wheel motor heat dissipation system of claim 3, wherein the heat dissipation pipe (52) comprises:

a metal tube (522) located at an inner layer, the metal tube (522) having the same cross section, and the metal tube (522) forming the perforation (523);

the fin (521) is fixed outside the metal tube (522).

5. The in-wheel motor heat dissipation system of claim 4, wherein:

the metal tube (522) is a stainless steel thin tube, the fins (521) are formed by rotary extrusion of an aluminum tube, and are fixed to the metal tube (522) through extrusion.

6. The in-wheel motor heat dissipation system of claim 2, wherein:

the main body (51) includes a water chamber (511) at both ends of the radiating pipe (52), each of the water chambers (511) is provided with a plurality of through holes communicating the plurality of radiating pipes (52) with the water chamber (511),

and one end of the water chamber (511) away from the radiating pipe (52) is communicated with the first water pipe (4).

7. A vehicle, characterized in that it comprises: the in-wheel motor heat dissipation system of claims 1-6.

8. The vehicle of claim 7, characterized in that:

the vehicle further comprises a torsion beam suspension (6), the second radiator (5) being fixed to the torsion beam suspension (6).

9. The vehicle of claim 8, characterized in that:

the axial direction of the second radiator (5) is perpendicular to the traveling direction of the vehicle.

10. The vehicle of claim 8, characterized in that:

and a support bracket (61) is fixedly arranged on the torsion beam suspension (6), and the second radiator (5) is fixed on the support bracket (61) through an upper pressure ring (62) and a lower pressure ring (63).