CN211981603U - Permanent magnet motor rotor and permanent magnet motor - Google Patents
Permanent magnet motor rotor and permanent magnet motor Download PDFInfo
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- CN211981603U CN211981603U CN202020978264.5U CN202020978264U CN211981603U CN 211981603 U CN211981603 U CN 211981603U CN 202020978264 U CN202020978264 U CN 202020978264U CN 211981603 U CN211981603 U CN 211981603U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 94
- 239000010959 steel Substances 0.000 claims abstract description 94
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 25
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 6
- 230000003313 weakening effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a permanent-magnet machine rotor and permanent-magnet machine. This permanent-magnet machine rotor includes: the rotor comprises a rotor core, V-shaped magnetic steel grooves uniformly formed in the rotor core and magnetic steel assembled in the V-shaped magnetic steel grooves; the permanent magnet motor rotor is characterized in that a magnetic bridge protrusion is arranged on the rotor core and is arranged at a position, close to a rotor q shaft, outside the V-shaped magnetic steel groove, the permanent magnet motor rotor optimizes a motor magnetic circuit by optimizing the shape of the magnetic bridge, iron loss under each working condition is reduced, motor driving efficiency and motor rotating speed are greatly improved, and the driving requirement of a new energy automobile is met.
Description
Technical Field
The utility model relates to a new energy automobile technical field especially relates to a permanent-magnet machine rotor and permanent-magnet machine.
Background
With the development of new energy vehicles, the new energy vehicles have increasingly high requirements on various aspects of performance of the driving motor (such as efficiency, rotation speed and NVH performance of the driving motor).
At present, a rotor structure of a driving motor generally adopts a rotor structure with single V-shaped magnetic steel arrangement. Wherein, each magnetic pole in the rotor structure that single V "type magnet steel was arranged all includes 2 magnet steels that become" V "type setting under. However, the rotor structure adopting a single "V" type magnetic steel arrangement at present has the following problems:
1) the single magnetic steel has relatively high weight, and the problem of rotor strength under the condition of high rotating speed is difficult to solve;
2) the armature reaction resistance is weak, under the deep weak magnetic working condition, the magnetic field distortion is large, the harmonic content is increased, the iron loss of the motor is increased, and the efficiency of the driving motor is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the existing rotor structure with single V-shaped magnetic steel arrangement has the problems of large iron loss of the motor and low efficiency of the driving motor.
An embodiment of the utility model provides a permanent-magnet machine rotor, include: the rotor comprises a rotor core, V-shaped magnetic steel grooves uniformly formed in the rotor core and magnetic steel assembled in the V-shaped magnetic steel grooves; and the rotor core is provided with a magnetic bridge protrusion, and the magnetic bridge protrusion is arranged at a position, close to a rotor q axis, outside the V-shaped magnetic steel groove.
Preferably, the V-shaped magnetic steel grooves include a first V-shaped magnetic steel groove and a second V-shaped magnetic steel groove; and a first distance from the first V-shaped magnetic steel groove to the edge of the rotor core is greater than a second distance from the second V-shaped magnetic steel groove to the edge of the rotor core.
Preferably, the included angle of the first V-shaped magnetic steel groove ranges from 82 degrees to 125 degrees.
Preferably, the included angle of the second V-shaped magnetic steel groove ranges from 140 degrees to 160 degrees.
Preferably, the magnetic bridge protrusion is a circular arc protrusion.
Preferably, the rotor core is provided with a first arc concave position extending from one end of the magnetic bridge protrusion and a second arc concave position extending from the other end of the magnetic bridge protrusion.
Preferably, the included angle between the connecting line of the circle center of the circular arc-shaped bulge and the center of the rotor iron core and the d axis of the rotor is 15-17 degrees.
Preferably, the diameter range of the circular arc-shaped bulge is 1/3-4/5 of the length of the air gap profile line of the V-shaped magnetic steel groove facing the air gap side.
Preferably, the area of the circular arc-shaped protrusion occupies 2/3-1/5 of the circle area.
The utility model discloses a permanent magnet motor rotor, including rotor core, the V type magnet steel groove of even setting on rotor core and the magnet steel of assembly on V type magnet steel groove. Through being equipped with the magnetic bridge arch on rotor core, the protruding setting of magnetic bridge is on the position that is close to rotor q axle in the V type magnet steel groove outside to optimize the magnetic bridge shape, thereby optimize motor magnetic circuit, reduce the iron loss under each operating mode, thereby promote motor drive efficiency and motor speed by a wide margin, satisfy new energy automobile's drive demand.
An embodiment of the utility model provides a permanent-magnet machine, including the permanent-magnet machine stator with as above permanent-magnet machine rotor.
The utility model discloses a permanent magnet motor, including permanent magnet motor stator and above-mentioned permanent magnet motor rotor, this permanent magnet motor iron loss volume, the undulant and motor noise of moment of torsion under each operating mode all can effectively reduce, and the motor performance obtains promoting to can satisfy the trend of new energy automobile driving motor high-speed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of a permanent magnet motor rotor according to an embodiment of the present invention;
fig. 2 is another schematic view of a permanent magnet motor rotor according to an embodiment of the present invention;
1. a rotor core; 11. a rotor q-axis; 12. a rotor d-axis; 2. the magnetic bridge is convex; 21. a first arc depression position; 22. a second arc depression position; 23. a vertical short side line; 31. a first V-shaped magnetic steel groove; 32. a second V-shaped magnetic steel groove; A. a rotor core center; a. a circle center standard line; 41. a first magnetic steel; 42. a second magnetic steel; 5. air gap profile.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a permanent magnet motor rotor, as shown in figure 1, the permanent magnet motor rotor comprises a rotor core 1, V-shaped magnetic steel grooves evenly arranged on the rotor core 1 and magnetic steel assembled on the V-shaped magnetic steel grooves; and a magnetic bridge bulge 2 is arranged on the rotor iron core 1, and the magnetic bridge bulge 2 is arranged at the position, close to the rotor q-axis 11, outside the V-shaped magnetic steel groove.
Specifically, the figure shows a specific schematic diagram of one magnetic pole in the rotor of the permanent magnet motor in the embodiment. Wherein, permanent-magnet machine rotor includes at least one magnetic pole, and along rotor circumferencial direction evenly distributed on rotor core 1, each magnetic pole all includes V type magnet steel groove and the magnet steel of assembly on V type magnet steel groove, sets up a magnetic bridge arch 2 on rotor core 1 near rotor q axle 11's the position to optimize the magnetic bridge shape, thereby optimize motor magnetic circuit, reduce the iron loss under each operating mode.
The magnetic steel is a cuboid, edges of the magnetic steel are filleted corners, and meanwhile the region where the magnetic steel is assembled in the V-shaped magnetic steel groove is matched with the shape of the magnetic steel, so that the magnetic steel is assembled on the V-shaped magnetic steel groove, stress is further dispersed, and the stamping life of the die is guaranteed.
Understandably, under the high-speed weak magnetic working condition or no-load working condition, the magnetic field in the motor is weaker, the magnetic bridge is widened by the magnetic bridge protrusion 2, the main magnetic field at the moment is weakened, and then the iron loss caused by the main magnetic field is reduced. Under the high-torque working condition, the magnetic field in the motor is strong, the magnetic flux at the magnetic bridge part after the magnetic bridge shape is optimized is saturated, the magnetic leakage is limited, and the main magnetic field and the stator magnetic field can be linked sufficiently, so that the torque of the motor can be fully exerted and the influence of the magnetic bridge protrusion 2 is small. The internal magnetic field of the motor comprises a main magnetic field and a stator magnetic field; the main magnetic field is the magnetic field generated by the rotor; the stator magnetic field is the magnetic field generated by the stator.
In this embodiment, the permanent magnet motor rotor includes rotor core 1, V-shaped magnetic steel slots evenly arranged on rotor core 1, and magnetic steel assembled on V-shaped magnetic steel slots. Through being equipped with protruding 2 of magnetic bridge on rotor core 1, protruding 2 of magnetic bridge sets up on the position that is close to rotor q axle 11 in the V type magnet steel groove outside to optimize the magnetic bridge shape, thereby optimize motor magnetic circuit, reduce the iron loss under each operating mode, thereby promote motor drive efficiency and motor speed by a wide margin, satisfy new energy automobile's drive demand.
In one embodiment, as shown in fig. 1, the V-shaped magnetic steel grooves include a first V-shaped magnetic steel groove 31 and a second V-shaped magnetic steel groove 32; the first distance from the first V-shaped magnetic steel slot 31 to the edge of the rotor core 1 is greater than the second distance from the second V-shaped magnetic steel slot 32 to the edge of the rotor core 1.
Specifically, this V type magnet steel groove includes first V type magnet steel groove 31 and second V type magnet steel groove 32, first V type magnet steel groove 31 is to the first distance at 1 edge of rotor core, be greater than the second V type magnet steel groove 32 to the second distance at 1 edge of rotor core, and be equipped with first magnet steel 41 on the first V type magnet steel groove 31, second V type magnet steel groove 32 is equipped with second magnet steel 42, in order to form double-deck V type rotor structure, this double-deck V type rotor structure can effectively reduce monolithic magnet steel weight, and multilayer magnet steel can be in the distribution of steady magnetic field under the load condition, can effectively strengthen anti armature reaction ability and anti demagnetization ability simultaneously.
It should be noted that, since the installation space of the second V-shaped magnetic steel groove 32 is limited, the magnetic bridge protrusion 2 may be arranged at a position close to the rotor q-axis 11 outside the first V-shaped magnetic steel groove 31.
In the embodiment, the sinusoidal distortion rate of the magnetic field waveform and the magnetic field harmonic component are effectively reduced by combining the double-layer V-shaped rotor structure with the magnetic bridge with the optimized shape, so that the iron loss is reduced, and meanwhile, the amplitude of the rotor harmonic magnetic field is reduced by reducing the sinusoidal distortion rate of the magnetic field waveform, so that the radial electromagnetic force of the motor is reduced, and the noise of the motor is greatly weakened.
In one embodiment, as shown in fig. 1 and 2, the included angle of the first V-shaped magnetic steel groove 31 ranges from 82 ° to 125 °.
Specifically, the included angle range of the first V-shaped magnetic steel slot 31, as shown in fig. 2, is 82 ° to 125 °, so as to effectively reduce the sinusoidal distortion rate of the magnetic field waveform, i.e. reduce the amplitude of the rotor harmonic magnetic field, thereby reducing the radial electromagnetic force of the motor, and further greatly attenuating the noise of the motor.
In this embodiment, in order to further reduce the noise of the motor, the included angle range of the first V-shaped magnetic steel groove 31 is preferably 90 ° to 118 ° to enhance the noise reduction effect of the motor.
In one embodiment, as shown in FIGS. 1 and 2, the included angle of the second V-shaped magnetic steel slot 32 is in the range of 140-160.
Specifically, the included angle range of the second V-shaped magnetic steel slot 32, as shown in the figure, is 82 ° to 125 °, so as to effectively reduce the sinusoidal distortion rate of the magnetic field waveform, i.e. reduce the amplitude of the rotor harmonic magnetic field, thereby reducing the radial electromagnetic force of the motor, and further greatly weakening the noise of the motor.
In this embodiment, in order to further reduce the noise of the motor, the included angle range of the second V-shaped magnetic steel groove 32 is preferably 90 ° to 118 ° to enhance the noise reduction effect of the motor.
In one embodiment, as shown in fig. 1 and 2, the magnetic bridge protrusion 2 is a circular arc protrusion.
In this embodiment, through designing magnetic bridge arch 2 into convex arch to optimize the magnetic bridge shape, reduce motor torque fluctuation, increase the motor and resist armature reaction ability, reduce the iron loss under the high-speed operating mode of motor, promote motor efficiency by a wide margin.
In addition, the magnetic bridge bulge 2 is designed into a circular arc bulge, so that the stress of the transition step can be effectively reduced, and the stamping life of the die is ensured.
In one embodiment, as shown in fig. 1 and 2, the rotor core 1 is provided with a first arc recess 21 extending from one end of the bridge protrusion 2 and a second arc recess 22 extending from the other end of the bridge protrusion 2.
In this embodiment, the optimized magnetic bridge shape further includes a first arc recessed position 21 extending from one end of the arc protrusion and a second arc recessed position 22 extending from the other end of the magnetic bridge protrusion 2, so that the magnetic bridge with the optimized shape is formed by combining the magnetic bridge protrusion 2, the first arc recessed position 21, the second arc recessed position 22 and a vertical short side line 23 tangent to the second arc recessed position 22, so as to constrain the trend of partial magnetic lines of force of the magnetic bridge, thereby optimizing the magnetic circuit of the motor, reducing the torque fluctuation of the motor, and simultaneously reducing the radial electromagnetic force, and further greatly weakening the noise of the motor.
Further, the first arc sunken position 21 is connected with the V-shaped magnetic steel groove fillet, and the magnetic bridge protrusion 2 is respectively connected with the first arc sunken position 21 and the second arc sunken position 22 through arc transition, so that stress can be effectively dispersed, and the stamping life of the die is ensured.
In one embodiment, as shown in fig. 1 and 2, the connection line between the center of the circular arc-shaped protrusion and the center a of the rotor core and the d-axis 12 of the rotor has an included angle in the range of 15-17 °.
In this embodiment, an angle θ between a connection line between a center of the circular arc protrusion and a center a (assumed to be a point a in the figure) of the rotor core as a center standard line a (indicated by a dotted line a in the figure) and a d-axis 12 of the rotor is in a range of 15 ° to 17 °, so as to optimize a magnetic circuit of the motor, effectively improve torque of the motor, reduce torque fluctuation, reduce radial electromagnetic force, weaken noise of the motor, and optimize performance of the motor.
Furthermore, the included angle range between the connection line of the circle center of the circular arc-shaped bulge and the center A of the rotor iron core and the d-axis 12 of the rotor is preferably 16 degrees, so that the technical effects of improving the torque of the motor, reducing the torque fluctuation, reducing the radial electromagnetic force and weakening the noise of the motor are better achieved.
In one embodiment, as shown in fig. 1 and 2, the diameter of the circular arc protrusion ranges from 1/3 to 4/5 of the length of the air gap contour line 5 of the V-shaped magnetic steel slot facing the air gap side.
The air gap contour line 5 specifically refers to a side surface contour line of the V-shaped magnetic steel slot facing the air gap side, and exemplarily, as shown in fig. 2, a straight line length of a side of the first V-shaped magnetic steel slot 31 facing the air gap side. The air gap side specifically refers to the portion of the rotor core 1 outside the figure, where the opening of the V-shaped magnetic steel slot faces. In this embodiment, the diameter range of the circle corresponding to the arc-shaped protrusion is 1/3-4/5 of the length of the air gap contour line 5 facing the air gap side of the V-shaped magnetic steel slot, so as to optimize the magnetic circuit of the motor, effectively increase the torque of the motor, reduce the torque fluctuation of the motor, and simultaneously reduce the radial electromagnetic force, thereby weakening the noise of the motor.
Furthermore, the diameter range of the circular arc-shaped bulge is preferably 2/5-4/5 of the length of the V-shaped magnetic steel groove facing the air gap contour line 5, so that the technical effects of improving the motor torque, reducing torque fluctuation, reducing radial electromagnetic force and weakening the noise of the motor are better realized.
In one embodiment, as shown in FIGS. 1 and 2, the area of the circular arc shaped protrusion occupies 2/3-1/5 of the area of the circle.
In the embodiment, the area of the circular arc-shaped bulge occupies 2/3-1/5 of the area of the corresponding circle so as to optimize the magnetic circuit of the motor, effectively increase the torque of the motor, reduce the torque fluctuation of the motor, reduce the radial electromagnetic force and further weaken the noise of the motor. Wherein the area of the circular arc bulge corresponding to the circle is pi r2And r is the radius of the circle corresponding to the circular arc protrusion, namely 1/2 of the diameter of the circle corresponding to the circular arc protrusion.
Furthermore, the area of the circular arc-shaped bulge is preferably 1/2-1/5 of the area of the corresponding circle, so that the technical effects of increasing the motor torque, reducing the motor torque fluctuation, reducing the radial electromagnetic force and weakening the noise of the motor are better realized.
In this embodiment, through optimizing magnetic bridge shape and V type magnetic steel groove to a plurality of parameter factors through optimizing magnetic bridge arch 2 and V type magnetic steel groove, the protruding 2 area of magnetic bridge promptly, its diameter that corresponds the circle, the centre of a circle and the contained angle in V type magnetic steel groove, promote the NVH performance of motor by a wide margin, motor power and motor speed etc. and can effectively solve optimization parameter in the current rotor topological structure comparatively single, be difficult to optimize the problem of magnetic circuit design according to the design demand meticulously.
The utility model provides a permanent magnet motor, including the permanent magnet motor stator with as above permanent magnet motor rotor.
In this embodiment, this permanent-magnet machine includes permanent-magnet machine stator and the cover establish as above on permanent-magnet machine stator permanent-magnet machine rotor, this permanent-magnet machine iron loss volume, the fluctuation of torque and motor noise under each operating mode all can effectively be reduced, and the motor performance obtains promoting to can satisfy the high-speed trend of new energy automobile driving motor.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A permanent magnet motor rotor, comprising: the rotor comprises a rotor core, V-shaped magnetic steel grooves uniformly formed in the rotor core and magnetic steel assembled in the V-shaped magnetic steel grooves; and the rotor core is provided with a magnetic bridge protrusion, and the magnetic bridge protrusion is arranged at a position, close to a rotor q axis, outside the V-shaped magnetic steel groove.
2. The permanent magnet motor rotor of claim 1 wherein said V-shaped magnet steel slots comprise a first V-shaped magnet steel slot and a second V-shaped magnet steel slot; and a first distance from the first V-shaped magnetic steel groove to the edge of the rotor core is greater than a second distance from the second V-shaped magnetic steel groove to the edge of the rotor core.
3. The permanent magnet motor rotor as claimed in claim 2, wherein said first V-shaped magnet steel slots have an included angle in the range of 82 ° -125 °.
4. The permanent magnet motor rotor as claimed in claim 2, wherein said second V-shaped magnet steel slots have an included angle in the range of 140 ° to 160 °.
5. The permanent magnet motor rotor as claimed in claim 1, wherein said magnetic bridge projections are circular arc projections.
6. The rotor of a permanent magnet electric machine according to claim 5, wherein said rotor core is provided with a first arc recess extending from one end of said magnetic bridge protrusion and a second arc recess extending from the other end of said magnetic bridge protrusion.
7. The permanent magnet motor rotor as claimed in claim 5, wherein the angle between the line connecting the center of the circular arc-shaped protrusion and the center of the rotor core and the d axis of the rotor is in the range of 15-17 °.
8. The rotor of claim 5, wherein the diameter of the circular arc protrusion is in the range of 1/3-4/5 of the length of the air gap profile line of the V-shaped magnetic steel slot facing the air gap side.
9. The rotor of a permanent magnet electric machine according to claim 5, wherein the area of the circular arc-shaped protrusion occupies 2/3-1/5 of the circle area.
10. A permanent magnet machine comprising a permanent magnet machine stator and a permanent magnet machine rotor according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020978264.5U CN211981603U (en) | 2020-06-01 | 2020-06-01 | Permanent magnet motor rotor and permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020978264.5U CN211981603U (en) | 2020-06-01 | 2020-06-01 | Permanent magnet motor rotor and permanent magnet motor |
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| CN211981603U true CN211981603U (en) | 2020-11-20 |
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| CN202020978264.5U Active CN211981603U (en) | 2020-06-01 | 2020-06-01 | Permanent magnet motor rotor and permanent magnet motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865367A (en) * | 2021-01-19 | 2021-05-28 | 浙江零跑科技有限公司 | Permanent magnet motor rotor structure for electric automobile |
| CN113964982A (en) * | 2021-08-23 | 2022-01-21 | 广东金霸智能科技股份有限公司 | Permanent magnet motor |
-
2020
- 2020-06-01 CN CN202020978264.5U patent/CN211981603U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865367A (en) * | 2021-01-19 | 2021-05-28 | 浙江零跑科技有限公司 | Permanent magnet motor rotor structure for electric automobile |
| CN113964982A (en) * | 2021-08-23 | 2022-01-21 | 广东金霸智能科技股份有限公司 | Permanent magnet motor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211227 Address after: 511400 No.36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: GAC AION New Energy Vehicle Co.,Ltd. Address before: 510030 23 building, Cheng Yue mansion 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: GAC AION NEW ENERGY AUTOMOBILE Co.,Ltd. Country or region after: China Address before: No. 36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee before: GAC AION New Energy Vehicle Co.,Ltd. Country or region before: China |