CN214542451U - Film collecting device for lithium battery diaphragm production - Google Patents
Film collecting device for lithium battery diaphragm production Download PDFInfo
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- CN214542451U CN214542451U CN202023066988.1U CN202023066988U CN214542451U CN 214542451 U CN214542451 U CN 214542451U CN 202023066988 U CN202023066988 U CN 202023066988U CN 214542451 U CN214542451 U CN 214542451U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a film collecting device for producing lithium battery diaphragms, which comprises a film collecting device main body, wherein the film collecting device main body comprises a film rolling shaft movably arranged at the center of the inner part, a pressing block connected between the inner walls of the film collecting device main body in a sliding way and a cutting knife movably arranged on the inner wall of one side of the film collecting device main body; a transmission mechanism is arranged in the shell of the film collecting device main body, a hand crank is movably arranged on the outer wall of one side of the film collecting device main body, and the pressing block moves along the direction of the horizontal film winding shaft by applying acting force on the hand crank to drive the transmission mechanism; the bottom of the film collecting device main body is provided with a second sliding chute. The utility model provides a receipts membrane device of lithium cell diaphragm production usefulness, through drive mechanism's setting, when making stay cord pulling cutting knife cut the diaphragm, the compact heap compresses tightly to rolling up membrane axle department along the horizontal direction to avoid cutting the back, the diaphragm of port department is because tension is curled up and is appeared the fold, thereby has avoided the extravagant resource.
Description
Technical Field
The utility model relates to a lithium cell technical field relates to a receipts membrane device of lithium cell diaphragm production usefulness particularly.
Background
In the construction of lithium batteries, the separator is one of the key internal components. The performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, directly influences the capacity, circulation, safety performance and other characteristics of the battery, and the diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery. The separator has a main function of separating the positive electrode and the negative electrode of the battery to prevent short circuit due to contact between the two electrodes, and also has a function of allowing electrolyte ions to pass therethrough. The separator material is non-conductive, and the physical and chemical properties of the separator have a great influence on the performance of the battery. The battery is different in kind and the separator used is different. In the lithium battery system, since the electrolyte is an organic solvent system, a separator material resistant to an organic solvent is required, and a polyolefin porous film having a high strength and a thin film is generally used.
However, the membrane collecting device for lithium battery membrane production in the current market needs to be cut when the membrane collecting is completed, but the membrane is kept in a tight state due to the fact that the membrane is feared to generate wrinkles when being collected, and the membrane at the port of the membrane sleeve can be rolled up due to the fact that the tension of the membrane when being tight is strong, so that the membrane cannot be used due to the fact that the wrinkles appear at one end of the membrane sleeve, and resources are wasted.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problem that prior art exists, the utility model aims to provide a receipts membrane device of lithium cell diaphragm production usefulness, it is strong owing to the state that stretches tight leads to tension when the rolling to solve the diaphragm, in case the diaphragm of cutting diaphragm sleeve port department can be curled up, leads to the problem of very extravagant resource.
Technical scheme
In order to achieve the purpose, the utility model provides a film collecting device for lithium battery diaphragm production, which comprises a film collecting device main body, wherein the film collecting device main body comprises a film rolling shaft movably arranged at the center of the inner part, a pressing block connected between the inner walls of the film collecting device main body in a sliding way and a cutting knife movably arranged on the inner wall of one side of the film collecting device main body; a transmission mechanism is arranged in the shell of the film collecting device main body, a hand crank is movably arranged on the outer wall of one side of the film collecting device main body, and the transmission mechanism is driven to enable the pressing block to move along the direction of the film winding shaft along the horizontal direction by applying acting force on the hand crank; the bottom of the film collecting device main body is provided with a second sliding groove, the bottom of the outer wall on one side is movably provided with a pull rope, and the cutting knife horizontally moves along the direction of the second sliding groove by applying acting force on the pull rope.
Preferably, the transmission mechanism comprises a threaded rod and a threaded block, the film collecting device body is located at two ends of the pressing block and is provided with first sliding grooves, the pressing block is connected to the inside of the first sliding grooves in a sliding mode, the threaded block is fixedly installed at two ends of the pressing block, the threaded rod is symmetrically installed inside shells on two sides of the film collecting device body, and the threaded rod is in threaded connection with the threaded block.
As preferred, drive mechanism still includes first gear, second gear, limiting plate and rotary rod, first gear fixed mounting respectively the one end of threaded rod, the limiting plate symmetry is installed receive the inside of membrane device main part one side casing, the both sides of rotary rod run through respectively the limiting plate, the second gear symmetry is installed the both ends of rotary rod, first gear and second gear mesh mutually.
Preferably, drive mechanism still includes third gear, fourth gear and rotates the post, third gear fixed mounting be in the middle part of rotary rod, the one end of rotating the post is run through and is extended to receive on the outer wall of membrane device main part one side and be connected with the crank, the fourth gear with the other end fixed connection who rotates the post, the fourth gear with the third gear meshes mutually.
Preferably, a T-shaped groove is formed in the center of each of two sides of the film collecting device body, the film winding shaft is connected to the inside of the T-shaped groove in a sliding mode, a connecting block is inserted into one end of the film winding shaft, a motor box is fixedly mounted on the outer wall of one side of the film collecting device body, a driving motor is fixedly mounted inside the motor box, and the other end of the connecting block is fixedly connected with the output end of the driving motor.
Preferably, a movable column is movably mounted at one end of the connecting block, the movable column is located at one end inside the connecting block and fixedly connected with a spring, an insertion groove is formed in the center of one end of the film winding shaft, the other end of the movable column is meshed with the insertion groove, a protrusion groove is formed in one side of the connecting block, a movable protrusion is fixedly mounted on one side of the movable column and located inside the protrusion groove, and an annular groove is formed in the position, where the movable protrusion is located, of the film collecting device main body located on the connecting block.
Preferably, a knife groove is formed in one side of the film collecting device main body, a hinged door is hinged to the outer wall of the same position, the knife groove is perpendicular to the second sliding groove, a knife holder is connected to the upper portion of the second sliding groove in a sliding mode, the cutting knife is movably mounted inside the knife holder, and the bottom of the knife holder is fixedly connected with the other end of the pull rope.
Preferably, a movable groove is formed in the upper portion of one side of the film collecting device body, and a movable shaft is movably mounted in the movable groove.
Advantageous effects
Compared with the prior art, the utility model provides a pair of receive membrane device of lithium cell diaphragm production usefulness possesses following beneficial effect: through drive mechanism's setting, when making stay cord pulling cutting knife cut the diaphragm, the compact heap compresses tightly to rolling up membrane axle department along the horizontal direction to avoid the cutting back, the diaphragm of port department rolls up because of tension and appears the fold, thereby has avoided the extravagant resource.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of another overall structure of the present invention;
FIG. 3 is a schematic view of the overall cross-sectional structure of the present invention;
FIG. 4 is an enlarged schematic view of the position A of the present invention;
fig. 5 is a schematic view of the structure of the middle connecting block of the present invention.
The main reference numbers:
1. a film collecting device main body; 2. a film winding shaft; 3. a compression block; 4. a movable shaft; 5. a cutting knife; 6. a T-shaped groove; 7. a first chute; 8. a cutter groove; 9. a movable groove; 10. a groove; 11. pulling a rope; 12. a hinged door; 13. a motor case; 14. a drive motor; 15. a transmission mechanism; 17. a tool apron; 18. a second chute; 19. a threaded rod; 20. a thread block; 21. a first gear; 22. a second gear; 23. a limiting plate; 24. a third gear; 25. a fourth gear; 26. a hand crank; 27. rotating the column; 28. rotating the rod; 30. connecting blocks; 31. an annular groove; 32. a movable post; 33. a movable projection; 34. a bump groove; 35. a spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
Referring to fig. 1-5, a film collecting device for producing a lithium battery diaphragm is provided with a transmission mechanism 15, so that when a cutting knife 5 is pulled by a pull rope 11 to cut the diaphragm, a pressing block 3 presses the diaphragm to a film winding shaft 2 along the horizontal direction, thereby preventing the diaphragm at the port from being curled up due to tension after cutting, and avoiding wasting resources.
It will be appreciated by those skilled in the art that other similar connections may be used to implement the present invention. Such as welding, bonding, or screwing.
As shown in fig. 1, fig. 2 and fig. 3, the present invention further provides a technical solution, which comprises a film collecting device body 1, wherein the film collecting device body 1 comprises a film rolling shaft 2 movably mounted at the center of the interior, a pressing block 3 slidably connected between the inner walls of the film collecting device body 1, and a cutting knife 5 movably mounted on the inner wall of one side of the film collecting device body 1; a transmission mechanism 15 is arranged in the shell of the film collecting device main body 1, a hand crank 26 is movably arranged on the outer wall of one side of the film collecting device main body 1, and the pressing block 3 moves along the direction of the horizontal film winding shaft 2 by applying acting force on the hand crank 26 to drive the transmission mechanism 15; the bottom of the film collecting device body 1 is provided with a second sliding groove 18, the bottom of the outer wall on one side is movably provided with a pull rope 11, and the cutting knife 5 horizontally moves along the direction of the second sliding groove 18 by applying acting force on the pull rope 11. When the film is required to be rolled, the driving motor 14 stops rotating, the transmission mechanism 15 is driven, the pressing block 3 is pressed to the film rolling shaft 2, and then the pull rope 11 is pulled to enable the cutting knife 5 to cut the diaphragm.
As shown in fig. 1, fig. 2 and fig. 3, the utility model discloses among the further proposed technical scheme, drive mechanism 15 includes threaded rod 19 and screw block 20, receives membrane device main part 1 and is located compact heap 3 both ends department and has seted up first spout 7, compact heap 3 sliding connection in the inside of first spout 7, screw block 20 fixed mounting is at the both ends of compact heap 3, threaded rod 19 symmetry is installed in the inside of receiving membrane device main part 1 both sides casing, threaded rod 19 and screw block 20 threaded connection. The first gear 21 rotates to drive the threaded rod 19 fixedly connected with the first gear to rotate, the threaded rod 19 drives the threaded block 20 in threaded connection with the threaded rod to horizontally move when rotating, the threaded blocks 20 on the two sides drive the pressing block 3 to move towards the film winding shaft 2 together, and the pressing block 3 is enabled to press the film winding shaft 2.
Referring to fig. 1, 2 and 3, preferably, the transmission mechanism 15 further includes a first gear 21, a second gear 22, a limiting plate 23 and a rotating rod 28, the first gear 21 is respectively and fixedly mounted at one end of the threaded rod 19, the limiting plate 23 is symmetrically mounted inside the housing on one side of the film collecting device body 1, two sides of the rotating rod 28 respectively penetrate through the limiting plate 23, the second gear 22 is symmetrically mounted at two ends of the rotating rod 28, and the first gear 21 and the second gear 22 are engaged with each other. The third gear 24 rotates the rotating rod 28 fixedly connected with the third gear, so that the second gears 22 on both sides of the rotating rod 28 rotate, and the second gears 22 rotate the first gears 21 engaged with the second gears 22.
Furthermore, as shown in fig. 1, fig. 2 and fig. 3, preferably, the transmission mechanism 15 further includes a third gear 24, a fourth gear 25 and a rotating column 27, the third gear 24 is fixedly installed in the middle of the rotating rod 28, one end of the rotating column 27 penetrates through and extends to the outer wall of one side of the film collecting device body 1 and is connected with the hand crank 26, the fourth gear 25 is fixedly connected with the other end of the rotating column 27, and the fourth gear 25 is meshed with the third gear 24. The hand crank 26 is rotated to drive the rotation column 27 to rotate, the rotation column 27 drives the fourth gear 25 fixedly connected with the rotation column to rotate, and the fourth gear 25 drives the third gear 24 meshed with the fourth gear to rotate.
The utility model discloses among the further technical scheme that provides, as shown in fig. 3, fig. 4 and fig. 5, the center department of receiving 1 both sides of membrane device main part has seted up T type groove 6, rolls up 2 sliding connection in the inside of T type groove 6 of membrane axle, and one end is pegged graft and is had connecting block 30, and fixed mounting has motor box 13 on one side outer wall of receiving membrane device main part 1, and the inside fixed mounting of motor box 13 has drive motor 14, and the other end of connecting block 30 and drive motor 14's output fixed connection. When rolling up the diaphragm, utilize driving motor 14 to drive connecting block 30 and rotate, connecting block 30 drives the rotation of roll membrane axle 2 to get up the diaphragm rolling, connecting block 30 utilizes spring 35 to support out movable post 32, makes movable post 32 be located the inserting groove of 2 one ends of roll membrane axle, thereby makes driving motor 14 drive through connecting block 30 and rolls up membrane axle 2 synchronous motion.
The utility model discloses among the further technical scheme that provides, as shown in fig. 3, fig. 4 and fig. 5, the one end movable mounting of connecting block 30 has movable post 32, movable post 32 is located the inside one end fixedly connected with spring 35 of connecting block 30, the inserting groove has been seted up to the center department of 2 one ends of roll membrane axle, movable post 32's the other end meshes with the inserting groove mutually, lug groove 34 has been seted up to one side of connecting block 30, one side fixed mounting of movable post 32 has movable lug 33, movable lug 33 is located the inside of lug groove 34, receive movable lug 33 department that membrane device main part 1 is located on connecting block 30 and seted up ring channel 31. The annular groove 31 is used for providing a movable space for the movable lug 33 when the connecting block 30 moves together with the film winding shaft 2, and when the film winding shaft 2 needs to be taken out, the movable lug 33 is pushed against by a cylinder with any size which is suitable and is poked into the groove 10 formed in one side of the T-shaped groove 6, so that the movable column 32 compresses the spring 35, and the splicing of the connecting block 30 and the film winding shaft 2 is released.
Further referring to fig. 1 and 3, it can be seen that, in some embodiments, preferably, a knife slot 8 is formed in one side of the film collecting device body 1, a hinged door 12 is hinged to an outer wall of the same position, the knife slot 8 is perpendicular to a second sliding groove 18, a knife holder 17 is slidably connected to an upper portion of the second sliding groove 18, the cutting knife 5 is movably installed inside the knife holder 17, and a bottom of the knife holder 17 is fixedly connected to the other end of the pull rope 11. The arrangement of the hinged door 12 is used for taking out the cutter seat 17, and after the cutter 5 is blunt, the cutter 5 on the cutter seat 17 is convenient to replace.
Further, in the present invention, as shown in fig. 1 and 2, a movable groove 9 is formed in an upper portion of one side of the film collecting device body 1, and a movable shaft 4 is movably mounted inside the movable groove 9. The movable shaft 4 plays a role of diaphragm transition, and the diaphragm is prevented from being damaged at the edge of the film collecting device body 1.
The utility model discloses a theory of operation and use flow: the hand crank 26 is rotated to drive the rotating column 27 to rotate, the rotating column 27 drives the fourth gear 25 fixedly connected with the rotating column to rotate, the fourth gear 25 drives the third gear 24 meshed with the fourth gear to rotate, the third gear 24 drives the rotating rod 28 fixedly connected with the third gear to rotate, so that the second gears 22 on two sides of the rotating rod 28 rotate, the second gears 22 drive the first gears 21 meshed with the second gears to rotate, so that the threaded rods 19 fixedly connected with the first gears 21 rotate, the threaded rods 19 drive the threaded blocks 20 in threaded connection with the threaded rods to horizontally move when rotating, the threaded blocks 20 on two sides drive the pressing blocks 3 to move towards the film rolling shaft 2 together, and the pressing blocks 3 are enabled to press the film rolling shaft 2; when the driving motor 14 stops driving, any block is used to push into the groove 10, and the movable lug 33 is pushed inwards, so that the movable column 32 is separated from one end of the film winding shaft 2, and the connection block 30 is disconnected from the film winding shaft 2.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
The above embodiments are merely exemplary embodiments of the present invention, which is not intended to limit the present invention, and the scope of the present invention is defined by the appended claims. Various modifications and equivalents may be made by those skilled in the art to the present invention without departing from the spirit and scope of the invention, and such modifications and equivalents should be considered to be within the scope of the invention.
Claims (8)
1. The utility model provides a receipts membrane device of lithium battery diaphragm production usefulness which characterized in that: the film collecting device comprises a film collecting device body (1), wherein the film collecting device body (1) comprises a film rolling shaft (2) movably arranged at the center of the interior, a pressing block (3) connected between the inner walls of the film collecting device body (1) in a sliding manner and a cutting knife (5) movably arranged on the inner wall of one side of the film collecting device body (1);
a transmission mechanism (15) is arranged in a shell of the film collecting device main body (1), a hand crank (26) is movably arranged on the outer wall of one side of the film collecting device main body (1), and the transmission mechanism (15) is driven to enable the pressing block (3) to move along the direction of the film rolling shaft (2) along the horizontal direction by applying acting force on the hand crank (26);
the bottom of the film collecting device main body (1) is provided with a second sliding groove (18), the bottom of the outer wall on one side is movably provided with a pull rope (11), and the cutting knife (5) can horizontally move along the direction of the second sliding groove (18) by applying acting force on the pull rope (11).
2. The film collecting device for producing the lithium battery diaphragm as claimed in claim 1, wherein: drive mechanism (15) include threaded rod (19) and screw block (20), it is located to receive membrane device main part (1) compact heap (3) both ends department has seted up first spout (7), compact heap (3) sliding connection in the inside of first spout (7), screw block (20) fixed mounting be in the both ends of compact heap (3), threaded rod (19) symmetry is installed receive the inside of membrane device main part (1) both sides casing, threaded rod (19) with screw block (20) threaded connection.
3. The film collecting device for producing the lithium battery diaphragm as claimed in claim 2, wherein: drive mechanism (15) still include first gear (21), second gear (22), limiting plate (23) and rotary rod (28), first gear (21) fixed mounting respectively is in the one end of threaded rod (19), limiting plate (23) symmetry is installed the inside of receipts membrane device main part (1) one side casing, the both sides of rotary rod (28) are run through respectively limiting plate (23), second gear (22) symmetry is installed the both ends of rotary rod (28), first gear (21) and second gear (22) mesh mutually.
4. The film collecting device for producing the lithium battery diaphragm as claimed in claim 3, wherein: drive mechanism (15) still include third gear (24), fourth gear (25) and rotate post (27), third gear (24) fixed mounting be in the middle part of rotary rod (28), the one end of rotating post (27) is run through and is extended to receive on the outer wall of membrane device main part (1) one side and be connected with hand crank (26), fourth gear (25) with the other end fixed connection who rotates post (27), fourth gear (25) with third gear (24) mesh mutually.
5. The film collecting device for producing the lithium battery diaphragm as claimed in claim 1, wherein: receive the center department of membrane device main part (1) both sides and seted up T type groove (6), roll up membrane axle (2) sliding connection in the inside of T type groove (6), and one end peg graft and have connecting block (30), fixed mounting has motor case (13) on the outer wall of one side of receiving membrane device main part (1), the inside fixed mounting of motor case (13) has driving motor (14), the other end of connecting block (30) with the output fixed connection of driving motor (14).
6. The film collecting device for producing the lithium battery diaphragm as claimed in claim 5, wherein: the one end movable mounting of connecting block (30) has movable post (32), movable post (32) are located connecting block (30) inside one end fixedly connected with spring (35), the inserting groove has been seted up to the center department of rolling up membrane axle (2) one end, the other end of activity post (32) with the inserting groove meshes mutually, boss groove (34) have been seted up to one side of connecting block (30), one side fixed mounting of activity post (32) has movable lug (33), movable lug (33) are located the inside of lug groove (34), receive membrane device main part (1) and be located on connecting block (30) ring channel (31) have been seted up in movable lug (33) place.
7. The film collecting device for producing the lithium battery diaphragm as claimed in claim 1, wherein: a knife groove (8) is formed in one side of the film collecting device main body (1), a hinged door (12) is hinged to the outer wall of the same position, the knife groove (8) is perpendicular to the second sliding groove (18), a knife holder (17) is connected to the upper portion of the second sliding groove (18) in a sliding mode, the cutting knife (5) is movably mounted inside the knife holder (17), and the bottom of the knife holder (17) is fixedly connected with the other end of the pull rope (11).
8. The film collecting device for producing the lithium battery diaphragm as claimed in claim 1, wherein: the upper part of one side of the film collecting device main body (1) is provided with a movable groove (9), and a movable shaft (4) is movably arranged in the movable groove (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023066988.1U CN214542451U (en) | 2020-12-18 | 2020-12-18 | Film collecting device for lithium battery diaphragm production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023066988.1U CN214542451U (en) | 2020-12-18 | 2020-12-18 | Film collecting device for lithium battery diaphragm production |
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| Publication Number | Publication Date |
|---|---|
| CN214542451U true CN214542451U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023066988.1U Active CN214542451U (en) | 2020-12-18 | 2020-12-18 | Film collecting device for lithium battery diaphragm production |
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| CN (1) | CN214542451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300806A (en) * | 2021-12-17 | 2022-04-08 | 深圳市博盛新材料有限公司 | Quick cutting equipment of lithium battery diaphragm |
-
2020
- 2020-12-18 CN CN202023066988.1U patent/CN214542451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300806A (en) * | 2021-12-17 | 2022-04-08 | 深圳市博盛新材料有限公司 | Quick cutting equipment of lithium battery diaphragm |
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Address after: 410600 No.188 Jinshui East Road, Ningxiang high tech Industrial Park, Changsha City, Hunan Province Patentee after: Sinoma lithium film (Ningxiang) Co.,Ltd. Address before: 410600 No.188 Jinshui East Road, Ningxiang high tech Industrial Park, Changsha City, Hunan Province Patentee before: HUNAN CHINALY NEW MATERIAL TECHNOLOGY Co.,Ltd. |
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