CN102331531B - Device for detecting phase sequence of motor stator - Google Patents
Device for detecting phase sequence of motor stator Download PDFInfo
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- CN102331531B CN102331531B CN 201110246706 CN201110246706A CN102331531B CN 102331531 B CN102331531 B CN 102331531B CN 201110246706 CN201110246706 CN 201110246706 CN 201110246706 A CN201110246706 A CN 201110246706A CN 102331531 B CN102331531 B CN 102331531B
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Abstract
The invention discloses a device for detecting the phase sequence of a motor stator, belonging to the field of permanent magnetic motors. The device comprises an oscilloscope, a rotor, a lower support plate and a base, wherein the oscilloscope is connected with a three-phase lead of a stator to be detected; the rotor is matched with the stator to be detected; the lower support plate is arranged below a fixing structure; the rotor comprises a permanent magnet group; the fixing structure of the permanent magnet group, a fixing structure of the permanent magnet group and a revolving shaft which passes through a central shaft of the fixing structure and is used for driving the central shaft to rotate; the lower support plate has a disk structure; the diameter of a disk is a little smaller than that of an iron core to be detected; the circle center of the disk passes through the lower part of the revolving shaft and is connected with the revolving shaft through a bearing; the base is positioned below the lower support plate and is connected with the lower support plate; the height of the base is same as that of a solenoid at the non-leading-out end of the stator to be detected; and the fixing structure, the lower support plate and the base are made of non-magnetic-conduction materials. The device for detecting the phase sequence of the motor stator provided by the invention has a simple structure, low cost and low stator rejection rate, and is easy to operate.
Description
Technical field
The present invention relates to the magneto field, particularly a kind of device that detects the permanent magnet motor stator phase sequence.
Background technology
Due to the global climate problem and energy problem day by day remarkable, energy-saving and emission-reduction become the theme of social development.At machine field, the magneto of efficient energy-saving is by widespread use more and more.
The magneto complex manufacturing, especially when producing motor stator, need to be to stator winding installation and wiring, the workman easily mistakes A in stator winding installation and wiring process, B, the C phase sequence, if A, B, mistake appears in the C phase sequence, may cause motor not run well, and driver module such as burns at the serious consequence.Therefore need to check the permanent magnet motor stator phase sequence.Because motor gas-gap is little, rotor has magnetic force, in the motor production run, be difficult for rotor is packed in stator, even reluctantly rotor is packed in stator, can be because of not having the bearing on motor shell end cover to fix rotor, and can't rotary rotor yet, thereby at the unassembled sequence examing that can't carry out motor stator before complete of motor assembly.The method of the detection stator phase sequence that therefore adopts now can only be after motor assembly have assembled, then adopts prime mover to drag the product motor, detects the A of stator by oscillograph, B, C phase sequence.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art: if after detecting by oscillograph, find that mistake appears in the stator phase sequence, because having assembled, completes this motor assembly, this stator advances paint through shaping, can't do over again and adjust, cause this stator even this motor scrap, cause the motor rejection rate to increase, production cost increases.
Summary of the invention
In order to solve problems of the prior art, the embodiment of the present invention provides a kind of device that detects phase sequence of motor stator.Described technical scheme is as follows:
a kind of device that detects phase sequence of motor stator, described device comprises the oscillograph that is connected with three phase terminals of stator to be measured and the rotor that is complementary with described stator to be measured, described rotor comprises set of permanent magnets, the fixed sturcture of described set of permanent magnets and pass the central shaft of described fixed sturcture and drive the rotating shaft of its rotation, described rotor also comprises lower supporting plate and the base that is located at described fixed sturcture below, described lower supporting plate is disc structure, the diameter of described disk is less than the diameter of stator core to be measured, and the center of circle is passed the bottom of described rotating shaft and is connected with described rotating shaft by bearing, described base is positioned at the below of described lower supporting plate and is connected with described lower supporting plate, its height is identical with the line bag height of the non-leading-out terminal of stator to be measured, described fixed sturcture, described lower supporting plate and described base are made by non-magnet material.
Further, described rotor also comprises the upper backup pad that is positioned at described fixed sturcture top, and described upper backup pad is identical with described lower supporting plate size and material, and the top that described rotating shaft is passed in the center of circle of described upper backup pad is connected with described rotating shaft by described bearing.
Particularly, the diameter of described upper backup pad and described lower supporting plate is than the little 1-2mm of diameter of described stator core to be measured.
Particularly, described set of permanent magnets is comprised of a plurality of measure-alike strip-shaped permanent-magnet bodies, and the mode that described permanent magnet replaces by N, the S utmost point is successively set on described fixed sturcture, and the number of poles of described set of permanent magnets is identical with the number of poles for the treatment of measured motor.
particularly, described fixed sturcture comprises upper mounted plate and bottom plate, fixed plate and described lower bottom plate are disc structure, its center of circle is passed and is fixed in described rotating shaft, its diameter is less than the diameter of described upper backup pad, the fixed plate is provided with a plurality of locating slots, described a plurality of locating slot is evenly distributed on circumference take described rotating shaft as the center of circle, described bottom plate also is provided with a plurality of described locating slots with identical distribution mode, the upper end of described set of permanent magnets is positioned at the locating slot of fixed plate, the lower end of described set of permanent magnets is positioned at the locating slot of described bottom plate.
Further, described fixed sturcture also comprises at least one middle part fixed head that is positioned at the middle part of described set of permanent magnets, and described middle part fixed head is provided with the pilot hole that a plurality of and described locating slot is complementary, and described middle part fixed head is passed at the middle part of described set of permanent magnets.
Described locating slot away from the distance at the edge of a side of described rotating shaft and described fixed head less than 5mm.
Further, described rotating shaft upper end is provided with rocking handle.
Particularly, described fixed head all is fixed in described rotating shaft by key or nut.
Particularly, described fixed sturcture, described upper and lower back up pad and described base are made by resin or epoxy plate.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: substitute iron core by adopting the fixed sturcture that non-magnetic shaped material is made, magnet fixing structure of permanent as rotor, the mode that adopts back up pad and base to coordinate is located, realized after the stator winding installation colligation, the phase sequence test can be arranged, process error can be more early found.The apparatus structure of detection phase sequence of motor stator provided by the invention is simple, cost is low, light, simple to operate, affected by magnetic force little, for convenience detach, and due to stator carry out phase sequence when detecting not shaping advance paint, adjustments of can doing over again, reduction scrappage.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is pack into structural representation after stator of the device of the detection phase sequence of motor stator that provides in the embodiment of the present invention;
Fig. 2 is the structural representation of the device rotor of the detection phase sequence of motor stator that provides in the embodiment of the present invention;
Fig. 3 is the structural representation of another angle of device rotor of the detection phase sequence of motor stator that provides in the embodiment of the present invention;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is pack into the outside drawing of stator of the device rotor of the detection phase sequence of motor stator that provides in the embodiment of the present invention;
Fig. 6 is the A-A sectional view of Fig. 5.
Wherein:
1, oscillograph, 2, rotor, 3, stator to be measured, 4, three phase terminals, 5, signal lead, 6, permanent magnet, 7, fixed sturcture, 8, rotating shaft, 9, bearing, 10, lower supporting plate, 11, base, 12, the line bag of non-leading-out terminal, 13, upper backup pad, 14, upper mounted plate, 15, bottom plate, 16, locating slot, 17, the middle part fixed head, 18, rocking handle.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment
Referring to Fig. 1, the embodiment of the present invention provides a kind of device that detects phase sequence of motor stator, described device comprises oscillograph 1 and rotor 2, and oscillograph 1 is connected with three phase terminals 4 (being A, B, C three phase terminals) of stator 1 to be measured by signal lead 5, and rotor 2 is complementary with stator 3 to be measured.
Referring to Fig. 2, rotor 2 comprises set of permanent magnets, fixed sturcture 7, rotating shaft 8, lower supporting plate 10 and base 11.Described set of permanent magnets is comprised of a plurality of permanent magnets 6, and the number of poles of permanent magnet 6 is identical with motor pole number to be detected, and described set of permanent magnets is fixed on fixed sturcture 7, and rotor 8 passes the central shaft of fixed sturcture 7, and can drive fixed sturcture 7 rotations.The fixed sturcture 7 that the embodiment of the present invention is used can adopt the fixed sturcture of existing fixed permanent magnet 6, but the material selection non-magnet material of fixed sturcture 7.Referring to Fig. 3 and Fig. 6, lower supporting plate 10 is disc structure, its diameter is slightly less than the diameter of stator 3 iron cores to be measured, back up pad 10 is inserted in stator 3 to be measured, can guarantee that again gap between the two is less, thereby make lower supporting plate 10 be difficult for producing relative motion with stator 3 to be measured, referring to Fig. 4, the center of circle of lower supporting plate 10 is passed the bottom of rotating shaft 8 and is connected with rotating shaft 8 by bearing 9, can guarantee that lower supporting plate 10 and rotating shaft 8 vertically without relative displacement, can make again both along the circumferential direction relatively rotate.Base 11 is positioned at the below of lower supporting plate 10 and is connected with lower supporting plate 10, in the embodiment of the present invention, base 11 is circular ring, its center of circle overlaps with rotating shaft 8, and its diameter is less than the diameter of upper backup pad 10, and its height is highly identical with the line bag 12 of stator 1 non-leading-out terminal to be measured.In inventive embodiments, the effect of base 11 is to be rotor 2 axial location, base 11 also can adopt other structures in other embodiments, and this structure be as long as can satisfy when rotor 2 is packed stator 3 to be measured into, and the iron core position that lower supporting plate 10 is positioned at stator 3 to be measured gets final product.Lower supporting plate 10 and base 11 are also made by non-magnet material.
The device of the detection phase sequence of motor stator that the use embodiment of the present invention provides can arrange the phase sequence test after the stator wiring is completed, concrete method of testing is as follows:
At first, referring to Fig. 5 and Fig. 6, the rotor that the embodiment of the present invention is provided is packed in stator to be measured, and this moment is because base is identical with the line bag height of the non-leading-out terminal of stator to be measured, and the lower supporting plate above base and the fixed sturcture that is fixed with set of permanent magnets are positioned at the iron core of stator to be measured;
Because fixed sturcture, lower supporting plate and the base of rotor are made by non-magnet material, compare with the iron core fixing structure of existing rotor, have characteristics lightweight and that absorption affinity is very little, thereby make rotor be easy to put into stator to be measured, operate lightly, can effectively reduce workman's operational load.
Then, manual direction rotating shaft in accordance with regulations, rotating shaft drives the fixed sturcture that is fixed with set of permanent magnets and rotates together, and set of permanent magnets produces rotating magnetic field, and the magnetic field reaction occurs with A, B, C three-phase in rotating magnetic field successively;
Because lower supporting plate and rotating shaft can relatively rotate, when rotating shaft is rotated, lower supporting plate is motionless, simultaneously because the gap between lower supporting plate and stator to be measured is very little, makes rotor energy stable rotation.
At last, observe U by oscillograph
ab, U
bcAnd U
caThe phase order relation, if find identically with the design phase sequence, stator to be measured is qualified, can then carry out next process, can untie the stator wiring and reexamine adjustment A, B, C phase sequence with to design phase sequence different if find.
The device of the detection phase sequence of motor stator that the use embodiment of the present invention provides, can carry out sequence examing to it in the stator production run, can more early find process error, avoided after the assembling of whole motor is completed that just stator is carried out the motor rejection rate that sequence examing causes and increased, the problem that production cost increases.
The apparatus structure of detection phase sequence of motor stator provided by the invention is simple, cost is low, light, simple to operate, affected by magnetic force little, for convenience detach, and due to stator carry out phase sequence when detecting not shaping advance paint, adjustments of can doing over again, reduction scrappage.
Referring to Fig. 2-4 in order better to realize above-mentioned purpose, the rotor 2 that the embodiment of the present invention provides also comprises the upper backup pad 13 that is positioned at fixed sturcture 7 tops, upper backup pad 13 is identical with lower supporting plate 10 sizes and material, and the top that rotating shaft 8 is passed in the center of circle of upper backup pad 13 is connected with rotating shaft 8 by bearing 9.
By upper backup pad is set, when rotor rotates, the relative displacement of upper backup pad and the common restrict rotor of lower supporting plate and stator, play the effect of centralized positioning better.
Through calculating repeatedly test, the diameter of upper backup pad 13 and lower supporting plate 10 is during than the little 1-2mm of diameter of stator 3 iron cores to be measured, can better realize to guarantee that back up pad 10 can insert in stator 3 to be measured, can guarantee that again lower supporting plate 10 is difficult for producing the purpose of relative motions with stator 3 to be measured.
In order better to realize the foregoing invention purpose, described set of permanent magnets is comprised of a plurality of measure-alike strip-shaped permanent-magnet bodies 6 in embodiments of the present invention, permanent magnet 6 is successively set on fixed sturcture according to the mode that N, the S utmost point replace, the number of poles of the set of permanent magnets that permanent magnet 6 forms is identical with the number of poles for the treatment of measured motor, in embodiments of the present invention, the width of permanent magnet 6 and thickness can be selected as required, generally according to permanent magnet 6 designs for the treatment of measured motor.
Referring to Fig. 2-4, in the embodiment of the present invention, fixed sturcture 7 comprises upper mounted plate 14 and bottom plate 15.As shown in Figure 4, upper mounted plate 14 and bottom plate 15 are disc structure, the center of circle of upper mounted plate 14 and bottom plate 15 is all passed and is fixed in rotating shaft 8, due to the rotor 2 that uses in the embodiment of the present invention and stator 3 couplings to be measured, therefore the equal diameters of upper mounted plate 14 and bottom plate 15 and all less than the diameter of upper backup pad 13, determine its diameter according to stator 3 to be measured, the distance between upper mounted plate 14 and bottom plate 15 is also determined according to stator 3 to be measured.referring to Fig. 2 and Fig. 4, the lower surface of upper mounted plate 14 is provided with a plurality of locating slots 16, the number of locating slot 16 and the number of the permanent magnet in set of permanent magnets 6 are complementary, its size is also according to the size design of permanent magnet 6, to guarantee to block permanent magnet 6, permanent magnet 6 is played the location fixation, a plurality of locating slots 16 are evenly distributed on circumference take rotating shaft 8 as the center of circle, to guarantee to be evenly distributed on after a plurality of permanent magnets 6 are installed on locating slot 16 around rotating shaft 8, the upper surface of bottom plate 15 also is provided with a plurality of locating slots 16 with identical distribution mode, and be complementary with locating slot 16 on upper mounted plate 14, the upper end that forms the permanent magnet 6 of described set of permanent magnets all is positioned at the locating slot 16 of upper mounted plate 14, the lower end all is positioned at the locating slot 16 of bottom plate 15.
It is rotor core that the fixed sturcture that the embodiment of the present invention provides substitutes traditional magnet fixing structure of permanent by the fixed head made from non-magnet material, further alleviated the weight of rotor and reduced it when inserting stator 3 to be measured absorption affinity with stator to be measured 3 generations, when carrying out the detection of stator phase sequence, operate lighter.
for fear of only by upper, lower two fixed head fixed permanent magnets 6, the permanent magnet 6 that may cause when too high at rotating shaft 8 rotating speeds breaks away from the problem of locating slots 16, the fixed sturcture 7 that the embodiment of the present invention provides also comprises at least one middle part fixed head 17 that is positioned at the middle part of described set of permanent magnets, structure and the upper mounted plate 14 of middle part fixed head 17, bottom plate 15 is identical, unique different be that middle part fixed head 17 is not provided with locating slot 16 but is provided with a plurality of pilot holes that are complementary with locating slot 16 (can referring to Fig. 2), the upper end of permanent magnet 6 is positioned at the locating slot 16 of upper mounted plate 14, the pilot hole of middle part fixed head 17 is passed at the middle part, the lower end is positioned at the locating slot 16 of bottom plate 15.The piece number of middle part fixed head 17 can be selected as required.
The upper mounted plate 14 that the embodiment of the present invention provides, its locating slot 16 away from the distance at the edge of a side of rotating shaft 8 and upper mounted plate 14 less than 5mm, locating slot 16 on bottom plate 15 is complementary with locating slot 16 on upper mounted plate 14, the surface of namely inserting the permanent magnet 6 in locating slot 16 to the distance at the edge of fixed head less than 5mm.The too low phenomenon of waveforms amplitude when having avoided the excessive test that may cause of distance.
In order to facilitate rotating shaft 8, rotating shaft 8 upper ends are provided with the rocking handle 18 that is fit to people's grasped.
Upper mounted plate 14 in the embodiment of the present invention, bottom plate 15 and middle part fixed head 17 all are fixed in rotating shaft 8 by key or nut.Key or nut structure are simple, and be easy to operate.
The fixed sturcture 7 that the embodiment of the present invention provides, upper mounted plate 14, bottom plate 15, middle part fixed head 17 and base 11 are made by resin or epoxy plate.Resin or epoxy plate are more common non-magnet material, and their lighter weight, cheap, thereby the absorption affinity of the quality that can alleviate rotor 2 when reducing it and inserting stator 3 to be measured have reduced again testing cost.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. device that detects phase sequence of motor stator, described device comprises the oscillograph that is connected with three phase terminals of stator to be measured and the rotor that is complementary with described stator to be measured, described rotor comprises set of permanent magnets, the fixed sturcture of described set of permanent magnets and pass the central shaft of described fixed sturcture and drive the rotating shaft that described fixed sturcture rotates, it is characterized in that, described rotor also comprises lower supporting plate and the base that is located at described fixed sturcture below, described lower supporting plate is disc structure, the diameter of described disk is less than the diameter of stator core to be measured, and the bottom of described rotating shaft is passed in the center of circle of described lower supporting plate, described lower supporting plate is connected with described rotating shaft by bearing, described base is positioned at the below of described lower supporting plate and is connected with described lower supporting plate, its height is identical with the line bag height of the non-leading-out terminal of stator to be measured, described fixed sturcture, described lower supporting plate and described base are made by non-magnet material, described rotor also comprises the upper backup pad that is positioned at described fixed sturcture top, described upper backup pad is identical with described lower supporting plate size and material, the top that described rotating shaft is passed in the center of circle of described upper backup pad is connected with described rotating shaft by described bearing.
2. the device of detection phase sequence of motor stator according to claim 1, is characterized in that, the diameter of described upper backup pad and described lower supporting plate is than the little 1-2mm of diameter of described stator core to be measured.
3. the device of detection phase sequence of motor stator according to claim 1, it is characterized in that, described set of permanent magnets is comprised of a plurality of measure-alike strip-shaped permanent-magnet bodies, the mode that described permanent magnet replaces by N, the S utmost point is successively set on described fixed sturcture, and the number of poles of described set of permanent magnets is identical with the number of poles for the treatment of measured motor.
4. the device of detection phase sequence of motor stator according to claim 1, it is characterized in that, described fixed sturcture comprises upper mounted plate and bottom plate, fixed plate and described bottom plate are disc structure, its center of circle is passed and is fixed in described rotating shaft, its diameter is less than the diameter of described upper backup pad, the fixed plate is provided with a plurality of locating slots, described a plurality of locating slot is evenly distributed on circumference take described rotating shaft as the center of circle, described bottom plate also is provided with a plurality of described locating slots with identical distribution mode, the upper end of described set of permanent magnets is positioned at the locating slot of fixed plate, the lower end of described set of permanent magnets is positioned at the locating slot of described bottom plate.
5. the device of detection phase sequence of motor stator according to claim 4, it is characterized in that, described fixed sturcture also comprises at least one middle part fixed head that is positioned at the middle part of described set of permanent magnets, described middle part fixed head is provided with the pilot hole that a plurality of and described locating slot is complementary, and described middle part fixed head is passed at the middle part of described set of permanent magnets.
6. the device of detection phase sequence of motor stator according to claim 4, is characterized in that, described locating slot away from the distance at the edge of a side of described rotating shaft and described fixed head less than 5mm.
7. the device of detection phase sequence of motor stator according to claim 1, is characterized in that, described rotating shaft upper end is provided with rocking handle.
8. the device of detection phase sequence of motor stator according to claim 5, is characterized in that, described fixed head all is fixed in described rotating shaft by key or nut.
9. the device of detection phase sequence of motor stator according to claim 1, is characterized in that, described fixed sturcture, described upper and lower back up pad and described base are made by resin or epoxy plate.
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| CN 201110246706 CN102331531B (en) | 2011-08-25 | 2011-08-25 | Device for detecting phase sequence of motor stator |
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| CN 201110246706 CN102331531B (en) | 2011-08-25 | 2011-08-25 | Device for detecting phase sequence of motor stator |
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| CN102331531A CN102331531A (en) | 2012-01-25 |
| CN102331531B true CN102331531B (en) | 2013-06-12 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103777109B (en) * | 2014-01-20 | 2018-03-23 | 广东美芝精密制造有限公司 | The stator lead-out wire of three-phase motor with permanent magnets matches somebody with somebody line detector and method |
| CN104049153A (en) * | 2014-06-23 | 2014-09-17 | 昆山富通电子有限公司 | Three-phase motor body phase sequence testing device |
| CN105911422A (en) * | 2016-04-27 | 2016-08-31 | 精基科技（嘉兴）有限公司 | Three-phase AC motor stator winding coil mismatched wiring detection apparatus and the detection method |
| CN106872809B (en) * | 2017-03-28 | 2023-09-08 | 中国第一汽车股份有限公司 | Stator phase sequence detection device based on pressure frequency control method |
| WO2024055151A1 (en) * | 2022-09-13 | 2024-03-21 | 威刚科技股份有限公司 | Stator test fixture and stator detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2259632Y (en) * | 1996-11-01 | 1997-08-13 | 孙文权 | Three-phase electric machine phase sequence test instrument |
| CN101398313A (en) * | 2007-09-25 | 2009-04-01 | 奇瑞汽车股份有限公司 | Motor rotor position sensor and method for measuring position of motor rotor |
| CN101718843A (en) * | 2009-12-09 | 2010-06-02 | 电子科技大学 | Stator winding phase sequence, corresponding relation determining method of stator winding phase sequence and coder and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110050150A1 (en) * | 2008-01-18 | 2011-03-03 | Magnus Lindmark Lilliestrale | Electric motor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2259632Y (en) * | 1996-11-01 | 1997-08-13 | 孙文权 | Three-phase electric machine phase sequence test instrument |
| CN101398313A (en) * | 2007-09-25 | 2009-04-01 | 奇瑞汽车股份有限公司 | Motor rotor position sensor and method for measuring position of motor rotor |
| CN101718843A (en) * | 2009-12-09 | 2010-06-02 | 电子科技大学 | Stator winding phase sequence, corresponding relation determining method of stator winding phase sequence and coder and device |
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Owner name: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SAIC CHERY AUTOMOBILE CO., LTD. Effective date: 20150702 |
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Effective date of registration: 20150702 Address after: 241000 Yijiang, Anhui Province, Jin Hua Road, No. 226, South Road, No. Patentee after: New-energy automobile Technology Co., Ltd. of Cherry Address before: 241006 Wuhu economic and Technological Development Zone, Anhui, Changchun Road, No. 8, No. Patentee before: Saic Chery Automobile Co., Ltd. |
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Address after: 241001 No. 226 Huajin South Road, Wuhu High-tech Industrial Development Zone, Wuhu City, Anhui Province Patentee after: Chery New Energy Automobile Co.,Ltd. Address before: 241000 No. 226 Hua Jin South Road, Yijiang District, Anhui, Wuhu Patentee before: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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