CN217016762U - Multiple grinding device of lithium cell graphite negative electrode material - Google Patents
Multiple grinding device of lithium cell graphite negative electrode material Download PDFInfo
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- CN217016762U CN217016762U CN202220745542.1U CN202220745542U CN217016762U CN 217016762 U CN217016762 U CN 217016762U CN 202220745542 U CN202220745542 U CN 202220745542U CN 217016762 U CN217016762 U CN 217016762U
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Abstract
The utility model provides a lithium battery graphite cathode material multiple grinding device which comprises a grinding processing machine, wherein the grinding processing machine comprises a grinding processing protective shell and a grinding processing mounting groove, the inner wall of the grinding processing protective shell is provided with the grinding processing mounting groove, a grinding device, a screening device, a pushing device, a reciprocating device, a placing box and a supporting column.
Description
Technical Field
The utility model relates to the technical field of lithium battery graphite cathode material processing, in particular to a multiple grinding device for a lithium battery graphite cathode material.
Background
In the production process of the lithium battery graphite cathode material, the lithium battery graphite cathode material needs to be ground, and the existing grinding device for the lithium battery graphite cathode material has an unsatisfactory grinding effect, and meanwhile, the grinding efficiency is low, so that the grinding particles of the lithium battery graphite cathode material are not in accordance with the standard, and the production speed of the lithium battery graphite cathode material is influenced.
Therefore, it is necessary to provide a new multiple grinding device for graphite cathode materials of lithium batteries to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a multiple grinding device for processing high-efficiency graphite cathode materials of a lithium battery.
The utility model provides a lithium battery graphite cathode material multiple grinding device, which comprises: the inner wall of the grinding processing machine is connected with a placing box in a sliding manner, the grinding processing machine comprises a grinding processing protective shell and a grinding processing mounting groove, the inner wall of the grinding processing protective shell is provided with a grinding processing mounting groove, the inner wall of the grinding processing mounting groove is connected with a grinding device for grinding in a rotating manner, the inner wall of the grinding processing mounting groove is provided with a screening device for screening, the inner wall of the grinding processing mounting groove is connected with a pushing device for feeding in a sliding manner, the inner wall of the grinding processing mounting groove is rotated with a reciprocating device which is matched with the grinding device for multiple grinding, lithium battery graphite cathode material raw materials are placed in the grinding processing mounting groove and are ground and processed through the grinding device, the screening device is shaken and screened, the lithium battery graphite cathode material raw materials which accord with the size enter the placing box, and the lithium battery graphite cathode material raw materials with the overlarge size are sent into the reciprocating device through the pushing device, the reciprocating device is matched with the grinding device to carry out repeated grinding.
Preferably, the grinding processing machine bottom symmetry fixedly connected with support column carries out the stable stay to the grinding processing machine, guarantees that the grinding processing machine in the use, can not produce easily and rock, and the lithium cell graphite negative pole material production speed of influence prevents simultaneously that grinding processing machine bottom direct contact ground from causing wearing and tearing.
Preferably, the grinding device comprises a first grinding roller, a second grinding roller, a first grinding gear, a second grinding gear and a grinding driving motor, the inner wall of the grinding processing installation groove is symmetrically and rotatably connected with a first grinding roller and a second grinding roller, the surfaces of the first grinding roller and the second grinding roller are fixedly connected with a first grinding gear and a second grinding gear, the first grinding gear is meshed with the second grinding gear, the inner wall of the grinding processing installation groove is fixedly connected with a grinding driving motor, and the output shaft of the grinding driving motor is fixedly connected with the first grinding gear, the grinding driving motor is started, the output shaft of the grinding driving motor drives the first grinding gear to rotate, the first grinding gear drives the second grinding gear to rotate, and the first grinding gear and the second grinding gear control the first grinding roller and the second grinding roller to rotate mutually so as to grind the graphite cathode material raw material of the lithium battery.
Preferably, the screening device comprises a screening filter screen, a screening driving motor, a first screening gear, a second screening gear and a screening linkage wheel, wherein the screening filter screen is connected to the inner wall of the grinding processing installation groove in a rotating manner, the screening driving motor is fixedly connected to the inner wall of the grinding processing installation groove, the first screening gear is fixedly connected to the output shaft of the screening driving motor, the screening linkage wheel is connected to the inner wall of the grinding processing installation groove in a rotating manner, the second screening gear is fixedly connected to the surface of the screening linkage wheel, the first screening gear is meshed with the second screening gear, the screening device further comprises a screening linkage rod, the screening linkage rod is fixedly connected to the bottom of the screening filter screen, the screening linkage wheel is in surface contact with the screening linkage rod, the screening driving motor is started, the output shaft of the screening driving motor drives the first screening gear to rotate, the first screening gear drives the second screening gear to rotate, the second screening gear control screening interlock wheel rotates, and the screening interlock wheel rotates the extrusion screening interlock pole, and the screening interlock pole drives the screening filter screen and slides from top to bottom along grinding processing mounting groove inner wall, screens lithium cell graphite negative pole material raw materials.
Preferably, the pushing device comprises a pushing electric push rod, a push plate, a rotating open-close plate and a torsion spring, the inner wall of the grinding processing installation groove is fixedly connected with the pushing electric push rod, the inner wall of the pushing electric push rod is connected with the push plate in a sliding manner, the pushing electric push rod is fixedly connected with the push plate, the inner wall of the grinding processing installation groove is rotatably connected with the rotating open-close plate, the surface of the rotating open-close plate is fixedly connected with the torsion spring, the torsion spring is fixedly connected with the inner wall of the grinding processing installation groove, the pushing electric push rod is started to drive the push plate to move along the inner wall of the grinding processing installation groove, the lithium battery graphite cathode material raw material with the oversize screening filter screen surface is sent into the reciprocating device, the push plate drives the lithium battery graphite cathode material with the oversize size to extrude the rotating open-close plate, and the rotating open-close plate rotates, and tightening the torsion spring, and feeding the oversize graphite cathode material of the lithium battery into the reciprocating device.
Preferably, the reciprocating device comprises a reciprocating transport groove and a reciprocating transport auger, the inner wall of the grinding and processing installation groove is provided with the reciprocating transport groove, the inner wall of the reciprocating transport groove is connected with the reciprocating transport auger in a rotating way, the reciprocating device further comprises a reciprocating transport motor, a first reciprocating gear and a second reciprocating gear, the inner wall of the reciprocating transport groove is fixedly connected with a reciprocating transport motor, the output shaft of the reciprocating transport motor is fixedly connected with a first reciprocating gear, the bottom of the reciprocating transport auger is fixedly connected with a second reciprocating gear, the first reciprocating gear and the second reciprocating gear are meshed and connected, the graphite cathode material of the lithium battery with overlarge size enters the reciprocating transport groove, the reciprocating transport motor is started, the output shaft of the reciprocating transport motor drives the first reciprocating gear to rotate, the first reciprocating gear drives the second reciprocating gear to rotate, and the second reciprocating gear controls the reciprocating transport auger to rotate along the inner wall of the reciprocating transport groove, feeding the oversized raw material of the graphite cathode material of the lithium battery into a grinding device for grinding again.
Compared with the related technology, the multiple grinding device for the graphite cathode material of the lithium battery provided by the utility model has the following beneficial effects:
the utility model provides a lithium battery graphite cathode material multiple grinding device which comprises:
1. through installation grinding device, sieving mechanism, pusher and reciprocating device, guarantee lithium cell graphite negative electrode material grinding device, not only the sufficient ideal of grinding effect, simultaneously, grinding efficiency is high-efficient, guarantees that lithium cell graphite negative electrode material grinding granule accords with the standard for lithium cell graphite negative electrode material's production speed.
2. Through grinding processing machine bottom symmetry fixedly connected with support column, carry out the outrigger to the grinding processing machine, guarantee that the grinding processing machine can not produce easily and rock in the use, the lithium cell graphite negative pole material production speed of influence simultaneously, prevents grinding processing machine bottom direct contact ground, causes wearing and tearing.
Drawings
FIG. 1 is a schematic view of the overall structure provided by the present invention;
FIG. 2 is a schematic overall cross-sectional structure provided by the present invention;
fig. 3 is a schematic structural view of the pulverizing device provided by the present invention;
FIG. 4 is a schematic structural diagram of a screening apparatus according to the present invention;
FIG. 5 is a schematic structural diagram of a pushing apparatus according to the present invention;
fig. 6 is a schematic structural view of a reciprocating device provided by the present invention.
The reference numbers in the figures: 1. a grinding processing machine; 11. grinding to process a protective shell; 12. a grinding processing mounting groove; 2. a grinding device; 21. a first pulverizing roller; 22. a second pulverizing roller; 23. a first grinding gear; 24. a second grinding gear; 25. a grinding drive motor; 3. a screening device; 31. screening a filter screen; 32. screening a driving motor; 33. a first screening gear; 34. a second screening gear; 35. screening the linkage wheels; 36. screening the linkage rods; 4. a pushing device; 41. pushing the electric push rod; 42. a push plate; 43. rotating the opening plate; 44. a torsion spring; 5. a reciprocating device; 51. a reciprocating transport tank; 52. a reciprocating transport auger; 53. a reciprocating transport motor; 54. a first reciprocating gear; 55. a second reciprocating gear; 6. placing a box; 7. and (7) supporting the column.
Detailed Description
The utility model is further described with reference to the following figures and embodiments.
Please refer to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6 in combination, wherein fig. 1 is a schematic diagram of an overall structure provided by the present invention; FIG. 2 is a schematic overall cross-sectional structure provided by the present invention; fig. 3 is a schematic structural view of the pulverizing device provided by the present invention; FIG. 4 is a schematic structural diagram of a screening apparatus according to the present invention; FIG. 5 is a schematic structural view of a pushing device according to the present invention; fig. 6 is a schematic structural view of a reciprocating device provided by the present invention. The multiple grinding device of lithium cell graphite cathode material includes: a grinding and processing machine 1 and a placing box 6.
In the specific implementation process, as shown in fig. 1 and fig. 2, the inner wall of the grinding processing machine 1 is slidably connected with a placing box 6, the grinding processing machine 1 includes a grinding processing protective shell 11 and a grinding processing installation groove 12, the inner wall of the grinding processing protective shell 11 is provided with the grinding processing installation groove 12, the inner wall of the grinding processing installation groove 12 is rotatably connected with a grinding device 2 for grinding, the inner wall of the grinding processing installation groove 12 is provided with a screening device 3 for screening, the inner wall of the grinding processing installation groove 12 is slidably connected with a pushing device 4 for feeding, the inner wall of the grinding processing installation groove 12 is rotatably provided with a reciprocating device 5 for performing multiple grinding matching with the grinding device 2, the lithium battery graphite cathode material is placed inside the grinding processing installation groove 12, grinding processing is performed through the grinding device 2, and the screening device 3 is shaken and screened, lithium battery graphite cathode material raw materials that accord with the size get into and place case 6, send into reciprocating device 5 through pusher 4 with the oversize lithium battery graphite cathode material raw materials, and reciprocating device 5 cooperates grinding device 2 to carry out the grinding repeatedly.
As shown in fig. 1, the bottom of the grinding processing machine 1 is symmetrically and fixedly connected with support pillars 7, so as to stably support the grinding processing machine 1, thereby ensuring that the grinding processing machine 1 cannot easily shake during use to influence the production speed of the lithium battery graphite negative electrode material, and preventing the bottom of the grinding processing machine 1 from directly contacting the ground to cause abrasion.
As shown in fig. 3, the grinding device 2 includes a first grinding roller 21, a second grinding roller 22, a first grinding gear 23, a second grinding gear 24 and a grinding driving motor 25, the inner wall of the grinding installation groove 12 is symmetrically and rotatably connected with the first grinding roller 21 and the second grinding roller 22, the first grinding roller 21 and the second grinding roller 22 are fixedly connected with the first grinding gear 23 and the second grinding gear 24 on the surface, the first grinding gear 23 is engaged with the second grinding gear 24, the inner wall of the grinding installation groove 12 is fixedly connected with the grinding driving motor 25, the output shaft of the grinding driving motor 25 is fixedly connected with the first grinding gear 23, the grinding driving motor 25 is started, the output shaft of the grinding driving motor 25 drives the first grinding gear 23 to rotate, the first grinding gear 23 drives the second grinding gear 24 to rotate, the first grinding gear 23 and the second grinding gear 24 control the first grinding roller 21 and the second grinding roller 22 to rotate with each other, and grinding the raw material of the graphite cathode material of the lithium battery.
As shown in fig. 4, the screening device 3 includes a screening filter 31, a screening driving motor 32, a first screening gear 33, a second screening gear 34 and a screening linkage 35, the inner wall of the grinding processing installation groove 12 is rotatably connected with the screening filter 31, the inner wall of the grinding processing installation groove 12 is fixedly connected with the screening driving motor 32, the output shaft of the screening driving motor 32 is fixedly connected with the first screening gear 33, the inner wall of the grinding processing installation groove 12 is rotatably connected with the screening linkage 35, the surface of the screening linkage 35 is fixedly connected with the second screening gear 34, and the first screening gear 33 and the second screening gear 34 are meshed and connected, the screening device 3 further includes a screening linkage 36, the bottom of the screening filter 31 is fixedly connected with the screening linkage 36, and the screening linkage 35 and the screening linkage 36 are in surface contact to start the screening driving motor 32, the output shaft of the screening driving motor 32 drives the first screening gear 33 to rotate, the first screening gear 33 drives the second screening gear 34 to rotate, the second screening gear 34 controls the screening linkage wheel 35 to rotate, the screening linkage wheel 35 rotates to extrude the screening linkage rod 36, and the screening linkage rod 36 drives the screening filter screen 31 to slide up and down along the inner wall of the grinding processing mounting groove 12 to screen the lithium battery graphite cathode material.
As shown in fig. 5, the pushing device 4 includes a pushing electric push rod 41, a pushing plate 42, a rotating open-close plate 43 and a torsion spring 44, the inner wall of the grinding processing installation groove 12 is fixedly connected with the pushing electric push rod 41, the inner wall of the pushing electric push rod 41 is slidably connected with the pushing plate 42, the pushing electric push rod 41 is fixedly connected with the pushing plate 42, the inner wall of the grinding processing installation groove 12 is rotatably connected with the rotating open-close plate 43, the surface of the rotating open-close plate 43 is fixedly connected with the torsion spring 44, the torsion spring 44 is fixedly connected with the inner wall of the grinding processing installation groove 12, the pushing electric push rod 41 is started, the pushing plate 42 is driven by the pushing electric push rod 41 to move along the inner wall of the grinding processing installation groove 12, the graphite cathode material of the lithium battery with the oversize surface size of the screening filter screen 31 is sent into the reciprocating device 5, and the pushing plate 42 drives the graphite cathode material of the lithium battery with the oversize size to extrude the rotating open-close plate 43, the rotary opening-closing plate 43 rotates, the torsion spring 44 is tightened, and the oversize graphite cathode material of the lithium battery enters the reciprocating device 5.
As shown in fig. 6, the reciprocating device 5 comprises a reciprocating transport groove 51 and a reciprocating transport auger 52, the reciprocating transport groove 51 is opened on the inner wall of the grinding and processing installation groove 12, the inner wall of the reciprocating transport groove 51 is connected with the reciprocating transport auger 52 in a rotating manner, the reciprocating device 5 further comprises a reciprocating transport motor 53, a first reciprocating gear 54 and a second reciprocating gear 55, the reciprocating transport motor 53 is fixedly connected on the inner wall of the reciprocating transport groove 51, the first reciprocating gear 54 is fixedly connected on the output shaft of the reciprocating transport motor 53, the second reciprocating gear 55 is fixedly connected on the bottom of the reciprocating transport auger 52, the first reciprocating gear 54 is meshed with the second reciprocating gear 55, the oversized lithium battery graphite cathode material enters the reciprocating transport groove 51, the reciprocating transport motor 53 is started, and the output shaft of the reciprocating transport motor 53 drives the first reciprocating gear 54 to rotate, the first reciprocating gear 54 drives the second reciprocating gear 55 to rotate, the second reciprocating gear 55 controls the reciprocating transport auger 52 to rotate along the inner wall of the reciprocating transport groove 51, and the lithium battery graphite cathode material with overlarge size is fed into the grinding device 2 to be ground again.
The working principle is as follows: lithium battery graphite cathode material raw materials are placed in the grinding processing installation groove 12 and are ground through the grinding device 2, the grinding driving motor 25 is started, an output shaft of the grinding driving motor 25 drives the first grinding gear 23 to rotate, the first grinding gear 23 drives the second grinding gear 24 to rotate, the first grinding gear 23 and the second grinding gear 24 control the first grinding roller 21 and the second grinding roller 22 to rotate mutually to grind the lithium battery graphite cathode material raw materials, the screening device 3 is shaken and screened, the screening driving motor 32 is started, an output shaft of the screening driving motor 32 drives the first screening gear 33 to rotate, the first screening gear 33 drives the second screening gear 34 to rotate, the second screening gear 34 controls the screening linkage wheel 35 to rotate, the screening linkage wheel 35 rotates to extrude the screening linkage rod 36, and the screening linkage rod 36 drives the screening filter net 31 to slide up and down along the inner wall of the grinding processing installation groove 12, screening lithium battery graphite cathode material raw materials, feeding the lithium battery graphite cathode material raw materials meeting the size into a placing box 6, feeding the lithium battery graphite cathode material raw materials with overlarge size into a reciprocating device 5 through a pushing device 4, starting a pushing electric push rod 41, driving a pushing plate 42 to move along the inner wall of a grinding processing mounting groove 12 through the pushing electric push rod 41, feeding the lithium battery graphite cathode material raw materials with overlarge size on the surface of a screening filter screen 31 into the reciprocating device 5, driving the lithium battery graphite cathode material raw materials with overlarge size to extrude and rotate an open plate 43 through the pushing plate 42, rotating the open plate 43 to rotate, tightening a torsion spring 44, feeding the lithium battery graphite cathode material raw materials with overlarge size into the reciprocating device 5, repeatedly grinding the lithium battery graphite cathode material raw materials with overlarge size by matching with a grinding device 2, feeding the lithium battery graphite cathode material with overlarge size into a reciprocating transport tank 51, the reciprocating transport motor 53 is started, an output shaft of the reciprocating transport motor 53 drives the first reciprocating gear 54 to rotate, the first reciprocating gear 54 drives the second reciprocating gear 55 to rotate, the second reciprocating gear 55 controls the reciprocating transport auger 52 to rotate along the inner wall of the reciprocating transport groove 51, and the lithium battery graphite cathode material raw material with overlarge size is sent to the grinding device 2 to be ground again.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a multiple grinding device of lithium cell graphite negative electrode material, includes: grinding processing machine (1) and place case (6), grinding processing machine (1) inner wall sliding connection has places case (6), its characterized in that, grinding processing machine (1) is including grinding processing protecting crust (11) and grinding processing mounting groove (12), grinding processing mounting groove (12) have been seted up to grinding processing protecting crust (11) inner wall, grinding processing mounting groove (12) inner wall rotates and is connected with milling device (2) that are used for the grinding, sieving mechanism (3) that are used for the screening are installed to grinding processing mounting groove (12) inner wall, grinding processing mounting groove (12) inner wall sliding connection has pusher (4) that are used for the pay-off, grinding processing mounting groove (12) inner wall rotates has reciprocal device (5) that cooperation milling device (2) carries out multiple grinding.
2. The multiple grinding device for graphite cathode materials of lithium batteries according to claim 1, wherein supporting columns (7) are symmetrically and fixedly connected to the bottom of the grinding processing machine (1).
3. The multiple grinding device for graphite negative electrode material of lithium battery as claimed in claim 1, wherein, the grinding device (2) comprises a first grinding roller (21), a second grinding roller (22), a first grinding gear (23), a second grinding gear (24) and a grinding driving motor (25), the inner wall of the grinding processing installation groove (12) is symmetrically and rotationally connected with a first grinding roller (21) and a second grinding roller (22), the surfaces of the first grinding roller (21) and the second grinding roller (22) are fixedly connected with a first grinding gear (23) and a second grinding gear (24), and the first grinding gear (23) is meshed with the second grinding gear (24), the inner wall of the grinding processing installation groove (12) is fixedly connected with a grinding driving motor (25), and an output shaft of the grinding driving motor (25) is fixedly connected with the first grinding gear (23).
4. The multiple grinding device for graphite negative electrode material of lithium battery as claimed in claim 1, wherein, the screening device (3) comprises a screening filter screen (31), a screening driving motor (32), a first screening gear (33), a second screening gear (34) and a screening linkage wheel (35), the inner wall of the grinding processing installation groove (12) is rotationally connected with a screening filter screen (31), the inner wall of the grinding processing installation groove (12) is fixedly connected with a screening driving motor (32), the output shaft of the screening driving motor (32) is fixedly connected with a first screening gear (33), the inner wall of the grinding processing installation groove (12) is rotationally connected with a screening interlocking wheel (35), the surface of the screening interlocking wheel (35) is fixedly connected with a second screening gear (34), and the first screening gear (33) and the second screening gear (34) are in meshed connection.
5. The multiple grinding device for the graphite negative electrode material of the lithium battery as claimed in claim 4, wherein the screening device (3) further comprises a screening linkage (36), the screening linkage (36) is fixedly connected to the bottom of the screening filter screen (31), and the screening linkage (35) is in surface contact with the screening linkage (36).
6. The multiple grinding device for the graphite anode material of the lithium battery as claimed in claim 1, wherein the pushing device (4) comprises a pushing electric push rod (41), a pushing plate (42), a rotating opening plate (43) and a torsion spring (44), the pushing electric push rod (41) is fixedly connected to the inner wall of the grinding mounting groove (12), the pushing plate (42) is slidably connected to the inner wall of the pushing electric push rod (41), the pushing electric push rod (41) and the pushing plate (42) are fixedly connected, the rotating opening plate (43) is rotatably connected to the inner wall of the grinding mounting groove (12), the torsion spring (44) is fixedly connected to the surface of the rotating opening plate (43), and the torsion spring (44) and the inner wall of the grinding mounting groove (12) are fixedly connected.
7. The multiple grinding device for graphite cathode materials of lithium batteries according to claim 1, wherein the reciprocating device (5) comprises a reciprocating conveying groove (51) and a reciprocating conveying auger (52), the reciprocating conveying groove (51) is formed in the inner wall of the grinding processing installation groove (12), and the reciprocating conveying auger (52) is rotatably connected to the inner wall of the reciprocating conveying groove (51).
8. The multiple grinding device for graphite cathode materials of lithium batteries according to claim 7, wherein the reciprocating device (5) further comprises a reciprocating motor (53), a first reciprocating gear (54) and a second reciprocating gear (55), the inner wall of the reciprocating trough (51) is fixedly connected with the reciprocating motor (53), the output shaft of the reciprocating motor (53) is fixedly connected with the first reciprocating gear (54), the bottom of the reciprocating packing auger (52) is fixedly connected with the second reciprocating gear (55), and the first reciprocating gear (54) and the second reciprocating gear (55) are meshed and connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220745542.1U CN217016762U (en) | 2022-04-01 | 2022-04-01 | Multiple grinding device of lithium cell graphite negative electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220745542.1U CN217016762U (en) | 2022-04-01 | 2022-04-01 | Multiple grinding device of lithium cell graphite negative electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217016762U true CN217016762U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220745542.1U Active CN217016762U (en) | 2022-04-01 | 2022-04-01 | Multiple grinding device of lithium cell graphite negative electrode material |
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| Country | Link |
|---|---|
| CN (1) | CN217016762U (en) |
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2022
- 2022-04-01 CN CN202220745542.1U patent/CN217016762U/en active Active
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Address after: 518000 factory building a, 174-1 Xiangshan Avenue, Luotian community, Yanluo street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Xinmao New Energy Technology Co.,Ltd. Address before: 518000 factory building a, 174-1 Xiangshan Avenue, Luotian community, Yanluo street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Xinmao New Energy Technology Co.,Ltd. |
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