CN105720712A - Disk-type hub motor adopting stator liquid cooling and having rotor magnetic steel being embedded - Google Patents
Disk-type hub motor adopting stator liquid cooling and having rotor magnetic steel being embedded Download PDFInfo
- Publication number
- CN105720712A CN105720712A CN201610241837.4A CN201610241837A CN105720712A CN 105720712 A CN105720712 A CN 105720712A CN 201610241837 A CN201610241837 A CN 201610241837A CN 105720712 A CN105720712 A CN 105720712A
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- drive end
- magnet steel
- stator
- rotor assembly
- bearing
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a disk-type hub motor adopting stator liquid cooling and having rotor magnetic steel being embedded. The disk-type hub motor comprises a stator assembly, a driving end rotor assembly, a non-driving end rotor assembly and a rotary transformer. The disk-type hub motor adopting stator liquid cooling and having rotor magnetic steel being embedded is an axial excitation flux motor. A dual-rotor single-stator framework is adopted, and rotors have magnetic steel embedded structures. A combined heat dissipation mode of stator liquid cooling and plastic package of a stator winding by epoxy resin is adopted in heat management. The disk-type motor in which the combined heat dissipation mode of stator liquid cooling and plastic package of the stator winding by the epoxy resin is adopted has the advantages of higher power density, higher torque density and more compact structure.
Description
Technical field
The present invention relates to the motor of a kind of pure electronic, field of hybrid electric vehicles, be specifically related to a kind of disc type wheel hub electric motor that stator liquid is cold and rotor magnetic steel is built-in.
Background technology
It mostly is the AC permanent magnet synchronous motor of radial flux, direct current generator or AC asynchronous motor at pure motor electronic, field of hybrid electric vehicles application, owing to the axial installation dimension of conventional radial motor is bigger, power density and efficiency are all on the low side, are unfavorable for the applications strict in electric automobile domain level constraints requirement, efficiency requirements is high.
Conventional water-cooled machine, the single methods for cooling such as the end cap water-cooled being generally adopted support water-cooled or minority, and pure electronic, mixed power electric motor of automobile degree of protection requires height, chassis installing space is narrow and small, the operating modes such as motor is overtaken other vehicles in acceleration, climbing, produce substantial amounts of heat, it is contemplated that in support, the capacity of heat transmission of air is poor, sometimes only carry out heat exchange tend not to shed in time by support water-cooled or end cap water-cooled, bring great challenge to motor temperature rise.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide the disc-type electric motor that a kind of stator coolant cools down and rotor is built-in.
The present invention adopts the following technical scheme that
A kind of stator liquid is cold and the built-in disc-type electric motor of rotor magnetic steel, it is characterised in that described motor adopts and includes stator module (st100), drive end rotor assembly (ro200), anti-drive end rotor assembly (ro300), rotary transformer (re400)；Described drive end rotor assembly (ro200) includes magnet steel (ro206), this magnet steel (ro206) excircle and coated on bottom side are covered with magnet steel bottom surface glue, magnet steel support (ro205) is used to position described magnet steel (ro206), in described magnet steel (ro206) outside, main pole (ro207) and leakage field pole (ro209) are installed, described main pole (ro207), leakage field pole (ro209) is fixed on described magnet steel support (ro205) by screw, rotor core (ro203) is fixed on described magnet steel support (ro205) by screw, drive end end cap (ro202) is fixed on described rotor core (ro203) by screw.
According to above-mentioned motor, it is characterized in that, drive end axle bearing (st113) is fixed on support frame (st107) by screw, non-driven-end bearing seat (st114) is a point half structure, Serpentis type cooling water channel (st115) is placed between described support frame (st107) and described non-driven-end bearing seat (st114), one side end face is axially positioned by described drive end axle bearing (st113), opposite side end face is axially positioned by bearing end cover (st116), and is provided with coolant inlet (st119) and cooling liquid outlet (st120)；Described stator module (st100) includes stator core (st101), and the outside wall surface of this stator core (st101) is cased with stator winding (st102), and described stator winding (st102) plastic packaging has epoxy resin.
According to above-mentioned motor, it is characterized in that, realized the relative motion of described stator module (st100) and anti-drive end rotor assembly (ro300) and drive end rotor assembly (ro200) by the angular contact ball bearing (ro214) of a pair back-to-back setting, angular contact bearing (ro215).
According to above-mentioned motor, it is characterised in that the coolant in described Serpentis type cooling water channel (st115) adopts 50% water and 50% ethylene glycol volume ratio to mix.
According to above-mentioned motor, it is characterised in that the drive end end cap (ro202) of described motor, support (1), non-drive end shield (ro310) adopt 6082 series alloys, and carry out anodic oxidation blackening process.
According to above-mentioned motor, it is characterised in that every piece of monomer of described magnet steel ro206 adopts block design, is made up of trapezoidal little magnet steel 4 pieces contour.
According to above-mentioned motor, it is characterized in that, the non-drive end shield (ro310) of described anti-drive end rotor assembly (ro300) is internally provided with lip packing (ro309), and described lip packing (ro309) contacts with the bearing end cover (st116) in described stator module (st100).
Beneficial effects of the present invention:
The disc type electric machine heat management design of the present invention can actively reduce loss and passively reduce loss.Actively reduce loss aspect to be mainly considered as ultra-thin stalloy and make stator core st101, main pole ro207, main pole ro302 and leakage field pole ro209, leakage field pole ro304, it is used for reducing iron loss, magnet steel ro206, magnet steel ro305 every piece of monomer adopt 4 sections of trapezoid blocks designs, and carrying out epoxy coating to block eddy current to reduce eddy-current loss, stator winding st102 adopts enamel-covered wire thin, that paint film temperature resistant grade is higher, multiply around to reduce the measures such as high-frequency vortex copper loss.Passive reduction loss aspect, uses epoxy resin plastic packaging by the stator winding st102 of stator module st100, improves heat conductivity, and adopts the logical coolant of Serpentis type cooling water channel st115 to take away heat.Magnet steel ro206, magnet steel ro305 adopt the N38EH sintered NdFeB material that temperature resistant grade is higher.By above measure, disc type electric machine is provided with higher heatproof and upgrades, it is possible to bearing bigger overload, structure is compacter, improves power of motor density and torque density；
Additionally, the disc type electric machine weak-magnetic speed-regulating ability of the present invention is wider.Drive end rotor assembly ro200 and anti-drive end rotor assembly ro300 have employed magnet steel ro206, magnet steel ro305 built-in structure, by arranging main pole ro207, main pole ro302 and leakage field pole ro209, leakage field pole ro304, obtain unequal friendship/d-axis magnetic circuit, thus having wider weak-magnetic speed-regulating ability.The internal spline of disc type electric machine is connected by spline pair with the external splines on the output shaft of variator or differential mechanism, wherein couples with variator, is used for slowing down；Couple with differential mechanism or to be mounted directly to wheel hub, for directly driving, because eliminating gear-box, the complexity reducing gear case assembly power attenuation and system, the efficiency that improve system and maintainability.Mainly as traction power, space, reliability, high power density, high efficiency, low noise etc. are required harshness, is suitable for the fields such as pure electronic, hybrid vehicle as the application directly driving, mating differential mechanism or change speed gear box.
Accompanying drawing explanation
Fig. 1 is the parts detonation configuration figure of disc type electric machine of the present invention.
Fig. 2 is the overall sectional structure chart of disc type electric machine of the present invention.
Fig. 3 is the magnetic structure figure of disc type electric machine of the present invention.
Fig. 4 is the stator module sectional structure chart of disc type electric machine of the present invention.
Fig. 5 is the stator module detonation configuration figure of disc type electric machine of the present invention.
Fig. 6 is the drive end rotor assembly sectional structure chart of disc type electric machine of the present invention.
Fig. 7 is the drive end rotor assembly detonation configuration figure of disc type electric machine of the present invention.
Fig. 8 is the anti-drive end rotor assembly sectional structure chart of disc type electric machine of the present invention.
Fig. 9 is the anti-drive end rotor assembly detonation configuration figure of disc type electric machine of the present invention.
Figure 10 is the rotary transformer assembly detonation configuration figure of disc type electric machine of the present invention.
Figure 11 is the rotary transformer assembly detonation configuration figure of disc type electric machine of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
Described stator liquid is cold and the built-in disc-type electric motor of rotor, is a kind of axial excitation flux electric machine, adopts double rotor single stator framework, and its rotor adopts magnetic steel built-in type structure, and heat management adopts stator liquid cold with stator winding epoxy resin plastic packaging integrated mode；Including stator module st100, drive end rotor assembly ro200, anti-drive end rotor assembly ro300, rotary transformer re400.Stator module st100 is positioned at the centre of drive end rotor assembly ro200 and anti-drive end rotor assembly ro300, is positioned by seam between drive end rotor assembly ro200 and anti-drive end rotor assembly ro300 and support 1.Drive end rotor assembly ro200, anti-drive end rotor assembly ro300, support 1 connect into the entirety rotated by holding screw 2 tightening, and stator module st100, as stationary part, is fixed on chassis, facilitate outlet and inject coolant.The rotation of rotary transformer re400 becomes rotor and is fixed on the anti-drive end rotor assembly ro300 main shaft ro213 comprised by holding screw re402, rotation set is fixed on the stator module st100 bearing end cover st116 comprised by holding screw re410, as shown in Fig. 1, Fig. 2.
Cold and the built-in disc-type electric motor of rotor the magnetic circuit of described stator liquid runs through stator module st100, drive end rotor assembly ro200 and anti-drive end rotor assembly ro300.Concrete magnetic circuit is as follows: magnet steel ro305a → main pole ro302a → stator core st101a → main pole ro207c → magnet steel ro206c → rotor core ro203 → magnet steel ro206b → main pole ro207b → stator core st101b → main pole ro302b → magnet steel ro305b → rotor core ro307.Wherein adjacent magnet steel ro305a and ro305b, ro206a and ro206b opposite polarity, relative magnet steel ro305a and ro206a, ro305b and ro206b opposite polarity, as shown in Figure 3.
Described stator module st100, such as Fig. 4, shown in Fig. 5, including stator core st101, stator core st101 by high magnetic permeability, low-loss, ultra-thin silicon steel disc is radially superposed forms, to reduce stator core loss, at upper and lower notch position, each welding 2 road weld seams, by each unitarily formed entirety.Each tooth of stator core st101 is cased with stator winding st102, stator winding st102 and draws three-phase UVW lead-out wire.
Support frame st107 is embedded between adjacent 2 teeth of stator core st101, the end face of stator winding st102 both sides uses outer end ring st106 and outer end ring st109, screw st104 and screw st111, interior end ring st106 is fixed to support frame st107 with interior end ring st106, screw st103 and screw st110, form an entirety, with limit stator core st101, stator winding st102 radially, axially, tangential motion.
Drive end axle bearing st113 is fixed on support frame st107 by screw st112, non-driven-end bearing seat st114, for the ease of installing/dismounting, design composition half structure, Serpentis type cooling water channel st115 is placed between support frame st107 and non-driven-end bearing seat st114, one side end face is axially positioned by drive end axle bearing st113, and opposite side end face is axially positioned by bearing end cover st116, and is provided with coolant inlet st119, cooling liquid outlet st120.
The heat that stator winding st102, stator core st101 produce, by the epoxy resin of stator winding st102 institute plastic packaging, is transmitted to the support frame st107 of aluminum alloy material, and the flowing coolant then passed through in Serpentis type cooling water channel st115 is taken away.This design, increases the contact area of dissipation of main pyrotoxin, significantly improves stator radiating effect.
Bearing end cover st116 is fixed on support frame st107 by screw st118.Temperature sensor detection line is drawn from the cycle hole of bearing end cover st116, uses rubber bush to seal.
Described drive end rotor assembly ro200, in order to make motor have wide weak-magnetic speed-regulating ability, drive end rotor assembly ro200 is designed to magnet steel ro206 built-in structure, reach friendship/direct axis reluctance unequal, simultaneously can firm fixing magnet steel and reduce the purpose of leakage magnetic flux, described drive end rotor assembly ro200 includes magnet steel ro206, magnet steel ro206 excircle and coating magnet steel bottom surface, bottom surface glue, use magnet steel support ro205 to carry out positioning magnetic steel ro206, limit its tangential, radial motion.Main pole ro207 and leakage field pole ro209 is installed in the outside of magnet steel ro206, by screw ro208, main pole ro207, leakage field pole ro209 are fixed on magnet steel support ro205, then pass through screw ro204 to be fixed to by rotor core ro203 on magnet steel support ro205, finally by screw ro201 by drive end end cap ro202 fixed rotor iron core ro203.
The relative motion of stator module st100 and anti-drive end rotor assembly ro300 and drive end rotor assembly ro200, realize by being provided with the angular contact ball bearing ro214 of one group of back-to-back setting, angular contact bearing ro215 at main shaft ro213, link with main shaft ro213 interference fit, link with drive end axle bearing st113 and non-driven-end bearing seat st114 interference fits, wherein the side of angular contact bearing ro214 inner ring is by main shaft ro213 seam location, and outer ring is spacing by the end face of the non-driven-end bearing seat st114 in stator module st100；Angular contact bearing ro215 inner ring side is spacing by the seam of main shaft ro213, and outer ring is spacing by the end face of the drive end axle bearing st113 in stator module st100, and inner ring opposite side is fixed by retainer nut ro216.Main shaft ro213 is fixed to drive end end cap ro202 by screw ro201, external internal splined shaft bushing ro211 is fixed to drive end end cap ro202 by screw ro210, meanwhile, is provided with O ro312 at anti-drive end cover ro310 and realizes static seal, as shown in Fig. 6, Fig. 7.
It is essentially identical that described anti-drive end rotor assembly ro300 includes main pole ro302, leakage field pole ro304, magnet steel ro305, magnet steel support ro306, rotor core ro307, non-drive end shield ro310 and screw ro301, screw ro303, screw 308, screw ro311 and drive end rotor assembly ro200 structure, fixed form.It is different in that non-drive end shield ro310 is internally provided with lip packing ro309, lip packing ro309 contacts with the bearing end cover st116 in stator module st100, realize contact seal effect, simultaneously, at anti-drive end cover ro310, O ro312 is installed and realizes static seal, as shown in Fig. 8, Fig. 9.
Described rotary transformer assembly re400, in order that detect rotor-position signal accurately, rotation set attached bag is drawn together rotation and is become stator core re408, it is embedded with rotation and becomes stator winding re407, rotation becomes stator core re408 and becomes stator flange re409 interference fit by hot jacket with rotation, and is fixed on the bearing end cover st116 in stator module st100 by screw re410；Rotation becomes rotor and includes rotation change rotor core re405, it is installed on axle sleeve re401, its axial distance is adjusted by sleeve re403, and limit its tangential motion by key re404, and using shaft block ring re406 to limit its axially-movable, axle sleeve re401 is fixed on the main shaft ro213 in drive end rotor assembly ro200 by screw re402.Rotation becomes stator flange re409 and has mounting hole, for adjusting the position of the circumferencial direction of rotation set, as shown in Figure 10, Figure 11.
The operation principle of the present invention is: the three-phase alternating current of the external inverter output of stator winding st102 in stator module st100, produce circular rotating field, the magnetic field intercepts stator winding st102 that magnet steel ro206, magnet steel ro305 produce, thus the circular rotating field that stator winding st102 produces drives the permanent magnetic field synchronous rotary that magnet steel ro206, magnet steel ro305 produce, produce electromagnetic torque.The heat produced in disc type electric machine running, take away mainly through the circulating cooling liquid in stator module st100, conducting hot scheme owing to have employed coolant cooling+stator winding st102 plastic packaging, disc type electric machine can bear bigger overload, has bigger power density and torque density；Have employed built-in rotor scheme so that disc type electric machine has broader weak-magnetic speed-regulating ability, it is possible to reliability service under higher rotating speed.
Although this specification is it has been illustrated and described that concrete embodiment, it will be understood by those skilled in the art that when without departing substantially from the scope of the present invention, various replacements or equivalent realize substituting shown in and described these be embodied as example.The application is intended to cover any change and discussed various of the present invention are embodied as example.Therefore the present invention is limited only by the claims and the equivalents thereof.
Claims (7)
1. a stator liquid is cold and the built-in disc-type electric motor of rotor magnetic steel, it is characterized in that, described motor adopts and includes stator module (st100), drive end rotor assembly (ro200), anti-drive end rotor assembly (ro300), rotary transformer (re400)；Described drive end rotor assembly (ro200) includes magnet steel (ro206), this magnet steel (ro206) excircle and coated on bottom side are covered with magnet steel bottom surface glue, magnet steel support (ro205) is used to position described magnet steel (ro206), in described magnet steel (ro206) outside, main pole (ro207) and leakage field pole (ro209) are installed, described main pole (ro207), leakage field pole (ro209) is fixed on described magnet steel support (ro205) by screw, rotor core (ro203) is fixed on described magnet steel support (ro205) by screw, drive end end cap (ro202) is fixed on described rotor core (ro203) by screw.
2. motor according to claim 1, it is characterized in that, drive end axle bearing (st113) is fixed on support frame (st107) by screw, non-driven-end bearing seat (st114) is a point half structure, Serpentis type cooling water channel (st115) is placed between described support frame (st107) and described non-driven-end bearing seat (st114), one side end face is axially positioned by described drive end axle bearing (st113), opposite side end face is axially positioned by bearing end cover (st116), and it is provided with coolant inlet (st119) and cooling liquid outlet (st120)；Described stator module (st100) includes stator core (st101), and the outside wall surface of this stator core (st101) is cased with stator winding (st102), and described stator winding (st102) plastic packaging has epoxy resin.
3. motor according to claim 1, it is characterized in that, realized the relative motion of described stator module (st100) and anti-drive end rotor assembly (ro300) and drive end rotor assembly (ro200) by the angular contact ball bearing (ro214) of a pair back-to-back setting, angular contact bearing (ro215).
4. motor according to claim 2, it is characterised in that the coolant in described Serpentis type cooling water channel (st115) adopts 50% water and 50% ethylene glycol volume ratio to mix.
5. motor according to claim 1, it is characterised in that the drive end end cap (ro202) of described motor, support (1), non-drive end shield (ro310) adopt 6082 series alloys, and carry out anodic oxidation blackening process.
6. motor according to claim 1, it is characterised in that every piece of monomer of described magnet steel ro206 adopts block design, is made up of trapezoidal little magnet steel 4 pieces contour.
7. motor according to claim 1, it is characterized in that, the non-drive end shield (ro310) of described anti-drive end rotor assembly (ro300) is internally provided with lip packing (ro309), and described lip packing (ro309) contacts with the bearing end cover (st116) in described stator module (st100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241837.4A CN105720712B (en) | 2016-04-19 | 2016-04-19 | The disc type wheel hub electric motor that a kind of stator liquid is cold and rotor magnetic steel is built-in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241837.4A CN105720712B (en) | 2016-04-19 | 2016-04-19 | The disc type wheel hub electric motor that a kind of stator liquid is cold and rotor magnetic steel is built-in |
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| Publication Number | Publication Date |
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| CN105720712A true CN105720712A (en) | 2016-06-29 |
| CN105720712B CN105720712B (en) | 2018-02-02 |
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| CN201610241837.4A Expired - Fee Related CN105720712B (en) | 2016-04-19 | 2016-04-19 | The disc type wheel hub electric motor that a kind of stator liquid is cold and rotor magnetic steel is built-in |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105703508A (en) * | 2016-04-22 | 2016-06-22 | 三门峡速达交通节能科技股份有限公司 | Disk type motor rotor with built-in magnetic steel |
| CN107181368A (en) * | 2017-07-05 | 2017-09-19 | 深圳小象电动科技有限公司 | A kind of disc type outer rotor motor of axial magnetic flux stator water-cooling |
| CN108155733A (en) * | 2018-01-10 | 2018-06-12 | 武汉索特南洋电机有限公司 | A kind of disc type electric machine |
| CN108736676A (en) * | 2018-07-02 | 2018-11-02 | 宁德时代电机科技有限公司 | Penetration radial magnetic circuit double rotor single stator with no yoke high torque density magneto |
| CN109962584A (en) * | 2017-12-22 | 2019-07-02 | 深圳市乐丰科技有限公司 | Disc type electric machine and its manufacturing method |
| CN110506380A (en) * | 2017-03-22 | 2019-11-26 | 万络机电公司 | Including electromagnetic engine or generator with the rotor through magnetization configuration and the stator with concentric winding that include unit magnet |
| CN113162300A (en) * | 2021-04-28 | 2021-07-23 | 中国第一汽车股份有限公司 | Motor cooling system, motor and vehicle |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105703508A (en) * | 2016-04-22 | 2016-06-22 | 三门峡速达交通节能科技股份有限公司 | Disk type motor rotor with built-in magnetic steel |
| CN110506380A (en) * | 2017-03-22 | 2019-11-26 | 万络机电公司 | Including electromagnetic engine or generator with the rotor through magnetization configuration and the stator with concentric winding that include unit magnet |
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| CN109962584A (en) * | 2017-12-22 | 2019-07-02 | 深圳市乐丰科技有限公司 | Disc type electric machine and its manufacturing method |
| CN108155733A (en) * | 2018-01-10 | 2018-06-12 | 武汉索特南洋电机有限公司 | A kind of disc type electric machine |
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| CN108736676A (en) * | 2018-07-02 | 2018-11-02 | 宁德时代电机科技有限公司 | Penetration radial magnetic circuit double rotor single stator with no yoke high torque density magneto |
| CN108736676B (en) * | 2018-07-02 | 2023-08-25 | 宁德时代电机科技有限公司 | Penetrating radial magnetic circuit double-rotor single-stator yoke-free high-torque-density permanent magnet motor |
| CN113162300A (en) * | 2021-04-28 | 2021-07-23 | 中国第一汽车股份有限公司 | Motor cooling system, motor and vehicle |
| CN113162300B (en) * | 2021-04-28 | 2023-04-14 | 中国第一汽车股份有限公司 | Motor cooling system, motor and vehicle |
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