CN212769883U - Binary channels negative pole material graphitizes device in succession - Google Patents
Binary channels negative pole material graphitizes device in succession Download PDFInfo
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Abstract
The utility model discloses a continuous graphitization device of binary channels cathode material, including two feed mechanism, the graphitization stove that both ends link to each other with two feed mechanism respectively, set up in graphitization stove and both ends place the heating channel on two feed mechanism respectively, two transfer passage of parallel arrangement in heating channel, set up in the electric heater that heating channel middle section and be connected with external power source, be used for loading the material and place a plurality of graphitization mechanism on transfer passage, adhere to two cooling mechanism that heat channel both ends and be used for the mechanism cooling of graphitization to and hydraulic pressure top pushes away the mechanism. The utility model discloses be provided with two transfer passage, and make two transfer passage direction of delivery opposite for the graphite box that loads the material can be followed two opposite directions and carried in to the graphitizing furnace, makes the material in the graphite box heated at the heating section, and the graphite box after having heated meets, the heat transfer at the heat transfer section with the graphite box on another transfer passage of waiting for the heating.
Description
Technical Field
The utility model relates to a graphitizing furnace technical field, specific saying relates to a continuous graphitization device of binary channels negative pole material.
Background
With the increasing national support of the new energy automobile industry, the demand of the cathode material as the core component of the lithium ion battery of the new energy automobile is increasing, and how to improve the capacity of the cathode material becomes a key concern of various large manufacturers. The graphitization of the lithium ion battery cathode material is the most complicated link in the whole cathode material production process, and most graphitization manufacturers at the present stage mainly fill the cathode material into a crucible, arrange the crucible in an Acheson furnace, and heat up the crucible to about 3000 ℃ by power transmission to achieve the purpose of graphitization of the cathode material.
In the production cycle of the existing graphitization device, the power transmission time is about 2 days, and the rest of the time is charging, cooling and discharging, so that the occupation time of the furnace is long, and the improvement of the production energy is seriously restricted; the production processing cycles of different materials are basically the same, the production speed cannot be adjusted according to the material properties, and the pertinence is poor; the electric energy consumption is large, the heat insulation material and the resistance material account for about 80% of the whole furnace chamber, most of the electric energy is used for heating the crucible, the resistance material, the heat insulation material and the like, the electric energy utilization rate is low, the energy waste is caused, and the production cost is high; the natural cooling method is adopted for cooling, the cooling process is slow, 70% of the production cycle of the whole furnace is required for cooling, the furnace chamber is seriously occupied, the heat is totally dissipated, effective heat energy reutilization cannot be formed, the reutilization rate of the heat is low, and the energy consumption waste is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems existing in the prior art, the utility model provides a binary channels cathode material continuous graphitization device with high productivity, high pertinence, low energy consumption and high heat reutilization rate.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a continuous graphitization device of binary channels cathode material, includes two feed mechanism, both ends respectively with two the graphitization stove that feed mechanism links to each other, set up in the graphitization stove and both ends place the heating channel on two feed mechanism respectively, parallel arrangement in two transfer passage in the heating channel, set up in the electric heater that heating channel middle section and be connected with external power source for load the material and place a plurality of graphitization mechanism on transfer passage, adhere to two cooling mechanism that the heating channel both ends just are used for cooling graphitization mechanism to and be used for pushing up the hydraulic pressure pushing mechanism that is located the heating channel of graphitization stove.
Furthermore, the two ends of the conveying channel are respectively a feeding end and a discharging end, wherein the two conveying channels are arranged in the heating channel in an anti-parallel mode, and the feeding end of one conveying channel and the discharging end of the other conveying channel are located at one end of the heating channel.
Specifically, the feeding mechanism comprises a support frame for supporting one end of the heating channel and a feeding pusher for pushing the graphitization mechanism positioned on the feeding end in the end of the heating channel, wherein the cooling mechanism is installed on the support frame and used for cooling one end of the heating channel.
Specifically, the interior of the graphitization furnace is filled with heat preservation materials for heat preservation around the heating channel.
Specifically, the graphitization mechanism comprises a graphite sliding plate which is placed on the conveying channel and pushed by a feeding pusher, and a graphite box body which is installed on the graphite sliding plate and used for loading materials, wherein the feeding pusher pushes the graphite sliding plate to enable the graphite box body to move along with the graphite sliding plate.
Specifically, cooling mechanism including adhere to in the cooling intermediate layer of heating channel one end, and set up in coolant liquid import and coolant liquid export on the cooling intermediate layer, wherein, the cooling intermediate layer links to each other with graphitizing furnace.
Specifically, the heating channel comprises a heating section which is located in the middle of the graphitization furnace and is connected with the electric heater, a first heat exchange section and a second heat exchange section which are respectively connected with two ends of the heating section and are located in the graphitization furnace, a first constant temperature section connected with the first heat exchange section, and a second constant temperature section connected with the second heat exchange section, wherein the first constant temperature section and the second constant temperature section are respectively located on two support frames, cooling interlayers in the two cooling mechanisms are respectively attached to the first constant temperature section and the second constant temperature section, the heat insulation material is filled in the graphitization furnace around the heating section, the first heat exchange section and the second heat exchange section, and the hydraulic pushing mechanism is used for pushing the first heat exchange section, the second heat exchange section and the heating section tightly.
Specifically, the hydraulic pushing mechanism comprises a pushing electrode positioned between the first constant temperature section and the first heat exchange section, a clamping block positioned between the second constant temperature section and the second heat exchange section, and a hydraulic pusher for pushing the pushing electrode, wherein a channel for accommodating the graphite sliding plate and the graphite box body to move is arranged inside the pushing electrode and the clamping block.
Specifically, an inert gas protection mechanism for performing gas protection on the graphite box body is arranged on the heating section, the first constant temperature section and the second constant temperature section.
Specifically, the inert gas protection mechanism includes a plurality of intake pipes with first normal atmospheric temperature section and second normal atmospheric temperature section intercommunication respectively to and a plurality of outlet ducts with the heating section intercommunication, wherein, it is a plurality of the intake pipe passes cooling intermediate layer and first normal atmospheric temperature section and second normal atmospheric temperature section intercommunication respectively, the outlet duct passes graphitization stove and heat preservation material and heating section intercommunication.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses be provided with two transfer passage, and make two transfer passage direction of delivery opposite, make the graphite box that loads the material can follow two opposite directions and carry in to the graphitizing furnace, and then make the material in the graphite box heated at the heating section, the graphite box after having heated meets at the heat transfer section with the graphite box on another transfer passage of waiting for the heating, and then make the graphite box of waiting for the heating absorb the heat of the graphite box after having heated, reach thermal recycle, also make the graphite box after having heated cool down more fast, thereby the cooling time has been practiced thrift.
(2) The utility model discloses be connected with the electric heater who links to each other with external power source at the heating section, and the heating channel is made for the higher material of resistance, under the circular telegram circumstances, the heating section can heat up to 3000 rapidly, realize heating the material in the graphite box that is located the heating section through the mode of contact heat transfer and thermal radiation heat transfer, make the material graphitization, and can guarantee the electric heater when heating at the heating section with the electric heater setting, can control electric heater's on-time according to the material kind of actual processing, thereby when making the different kind materials of heating, can control its heat time, and can be through the promotion speed of control feeding impeller, the production speed of controlling the material, make the heating utensil have pertinence.
(3) The utility model discloses a to heating channel direct heating, compare in prior art most electric energy be used for the heating to crucible, resistance material, heat preservation material etc. save heating resistance material link, shorten process flow, heating efficiency is high, and electric energy utilization is high.
(4) The utility model discloses it has the one deck cooling intermediate layer to adhere to on normal atmospheric temperature section to continuously let in the coolant liquid in to the cooling intermediate layer through the coolant liquid import, the coolant liquid after the use flows from the coolant liquid export, constantly absorbs the heat of the graphite box in the discharge end, realizes material rapid cooling function, shortens production cycle.
(5) The utility model discloses a be provided with a plurality of intake pipes respectively in first normal atmospheric temperature section and second normal atmospheric temperature section, be provided with a plurality of outlet ducts in the heating section, to continuously letting in inert gas in the heating channel to prevent the material contact after air and the graphitization, prevent material oxidation.
(6) The utility model discloses a control feeding impeller promotes the graphite box for when the graphite box was impeld graphitizing furnace, the graphite box that is located graphitizing furnace was released, thereby realized throwing the material, got the automation of material, avoided the manual work to throw the material, got the material, reduced artifical intensity of labour.
(7) The utility model discloses a control hydraulic pressure top pushes away the ware and pushes away and push away the electrode tightly, with chucking piece chucking between second heat transfer section and second normal atmospheric temperature section to make the chucking piece fix in the graphitizing furnace, realize with this pushing away the immediate close of tight first heat transfer section, heating section, second heat transfer section, prevent because each part of heating channel part separately and lead to electric heater to produce electric arc phenomenon, cause danger in the power transmission, thereby realize safe operation.
Drawings
Fig. 1 is a schematic side view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a partial enlarged view of a portion a of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-a graphitization furnace, 2-a heating channel, 3-a conveying channel, 4-an electric heater, 5-a feeding end, 6-a discharging end, 7-a support frame, 8-a feeding pusher, 9-a heat preservation material, 10-a graphite sliding plate, 11-a graphite box body, 12-a cooling interlayer, 13-a cooling liquid inlet, 14-a cooling liquid outlet, 15-an air inlet pipe, 16-an air outlet pipe, 17-a heating section, 18-a first heat exchange section, 19-a second heat exchange section, 20-a first normal temperature section, 21-a second normal temperature section, 22-a clamping block, 23-a hydraulic jacking device and 24-a jacking electrode.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in fig. 1 to 3, the dual-channel cathode material continuous graphitization device comprises a feeding mechanism, a graphitization furnace 1, a heating channel 2, a conveying channel 3, an electric heater 4, a graphitization mechanism, a cooling mechanism, a hydraulic pushing mechanism and an inert gas protection mechanism.
The number of the feeding mechanisms is two, the two feeding mechanisms are respectively arranged at two ends of the graphitization furnace 1 and are used for conveying the graphitization mechanisms loaded with materials into the graphitization furnace 1 for heating treatment, and each feeding mechanism comprises a support frame 7 and a feeding pusher 8. The support frames 7 are connected with one end of the graphitization furnace 1, and the support frames 7 in the two feeding mechanisms are respectively used for supporting a first constant temperature section 20 and a second constant temperature section 21 of the heating channel 2; the feeding pusher 8 pushes the graphitization mechanism located on the feeding end 5 of the conveying channel 3 towards the discharging end 6, so that the graphitization mechanism continuously moves towards the inside of the graphitization furnace 1.
The graphitization furnace 1 is used for heating materials in the graphite box body 11 to graphitize the materials, the interior of the graphitization furnace is filled with a heat insulation material 9 for insulating the heating pipeline 2, a heating channel 2 is transversely arranged in the heat insulation material 9, two ends of a first constant temperature section 20 and a second constant temperature section 21 of the heating channel 2 penetrate through the side edge of the graphitization furnace 1 and are placed on the support frame 7, and a heating section 17, a first heat exchange section 18 and a second heat exchange section 19 of the heating channel 2 are positioned in the graphitization furnace 1.
The heating channel 2 is arranged in the graphitization furnace 1, two ends of the heating channel are respectively arranged on the two support frames 7 and are used for accommodating the two conveying channels 3, the part in the graphitization furnace 1 is used for heating the graphitization mechanism positioned on the conveying channels 3 to graphitize the material, and the heating channel comprises a heating section 17, a first heat exchange section 18, a second heat exchange section 19, a first normal temperature section 20 and a second normal temperature section 21. The heating section 17 is located in the middle of the graphitization furnace 1 and is connected with the electric heater 4, and under the condition that the electric heater 4 is electrified, the heating section 17 is conductive, and because the heating section is made of a material with high resistance, the temperature can be rapidly raised to about 3000 ℃ under the electrified condition, and materials in the graphitization mechanism in the heating section 17 are heated and graphitized; the two ends of the first heat exchange section 18 are respectively connected with the heating section 17 and the pushing electrode 24 and are positioned in the graphitization furnace 1, so that the materials in the two oppositely conveyed conveying channels 3 are subjected to heat exchange in the first heat exchange section 18, the un-graphitized graphite box body 11 absorbs heat from the graphitized graphite box body 11, and the materials in the un-graphitized graphite box body 11 are preheated; two ends of the second heat exchange section 19 are respectively connected with the other end of the heating section 17 and the clamping block 22, and the function of the second heat exchange section is the same as that of the first heat exchange section 18; the first constant temperature section 20 is positioned on the support frame 7 and connected with the pushing electrode 24, and a layer of cooling interlayer 12 is attached on the first constant temperature section and used for cooling the graphite box body 11 output from the first heat exchange section 18, so that the materials in the first constant temperature section can be cooled as soon as possible, and the subsequent treatment is convenient; the second constant temperature section 21 is placed on the support frame 7 in the other feeding mechanism, is connected with the clamping block 22, is also attached with a layer of cooling interlayer 12, and has the same function as the first constant temperature section 20.
The two conveying channels 3 are arranged in the first constant temperature section 20, the first heat exchange section 18, the heating section 17, the second heat exchange section 19, the second constant temperature section 21, the pushing electrode 24 and the clamping block 22 in reverse parallel, and are used for conveying the graphite box body 11, so that the graphite box body 11 is conveyed to the heating section 17 on the conveying channels to be heated, the material in the graphite box body is graphitized, the two ends of the graphite box body are respectively a feeding end 5 and a discharging end 6, the feeding end 5 of one conveying channel 3 and the discharging end 6 of the other conveying channel 3 are both arranged on the same supporting frame 7, so that the material can be reversely conveyed on the two conveying channels 3, the material in the graphite box body 11 is further heated in the heating section 17, the heated graphite box body 11 meets the graphite box body 11 on the other conveying channel 3 waiting to be heated in the first heat exchange section 18 or the second heat exchange section 19, and the graphite box body 11 to be heated absorbs the heat of the heated graphite box body 11, the heat is recycled, and the graphite box body 11 after being heated is cooled more quickly, so that the cooling time is saved.
The electric heater 4 is installed on the heating section 17, and is connected to an external power source for introducing current, so that the heat exchange section 17 can be sufficiently heated when it is powered on.
The graphitizing mechanism is arranged on two conveying channels 3 in sequence and adjacently, is put on the feeding end 5, is pushed by the feeding pusher 8, is pushed forwards, and is repeated continuously, so that the material can be conveyed to the heating section 17 continuously to be heated, and the graphitizing mechanism comprises two parts, namely a graphite sliding plate 10 and a graphite box body 11. Wherein, the graphite slide plate 10 is arranged on the conveying channel 3 and is used for driving the graphite box body 11 positioned above the graphite slide plate to move, and the graphite slide plate is pushed by the feeding pushing device 8; the graphite box body 11 is positioned on the graphite sliding plate 10 and is used for containing materials.
The cooling mechanisms are attached to the first constant temperature section 20 and the second constant temperature section 21 respectively, are used for cooling the graphite box body 11 which is sent out of the graphitization furnace 1 to enable the graphite box body to be cooled as soon as possible, and comprise a cooling interlayer 12, a cooling liquid inlet 13 and a cooling liquid outlet 14. The cooling interlayer 12 is attached to the first constant temperature section 20 or the second constant temperature section 21, and the cooling liquid therein absorbs the heat on the first constant temperature section 20 or the second constant temperature section 21, so as to realize cooling; the cooling liquid inlet 13 is arranged on the cooling interlayer 12, is far away from the graphitization furnace 1 and is used for accessing cooling liquid; the cooling liquid outlet 14 is arranged on the cooling interlayer 12, is close to the graphitization furnace 1, and is used for outputting the used cooling liquid, and the cooling liquid absorbing heat can be used for heating subsequent external equipment, so that the energy can be recycled.
The hydraulic pushing mechanism is used for pushing the first heat exchange section 18, the heating section 17 and the second heat exchange section 19 tightly, and preventing the electric heater 4 from generating an electric arc phenomenon when power is supplied due to the separation of the parts of the heating channel 2, and comprises a pushing electrode 24, a hydraulic pusher 23 and a clamping block 22. Wherein, the pushing electrode 24 is positioned in the graphitization furnace 1, is arranged between the first normal temperature section 20 and the first heat exchange section 18, and is internally provided with a space for accommodating the movement of the two conveying channels 3 and the graphitization mechanism; the hydraulic ejector 23 is connected with the ejector electrode 24 and is used for pushing the ejector electrode 24 to move so as to tightly push the first heat exchange section 18, the heating section 17 and the second heat exchange section 19; the clamping block 22 is positioned in the graphitization furnace 1 and positioned between the second heat exchange section 19 and the second normal temperature section 21, a pushing wall is fixed behind the clamping block to support the clamping block and is fixed in the graphitization furnace 1, spaces for accommodating the two conveying channels 3 and the graphitization mechanism to move are also arranged in the clamping block and the pushing wall, the position of the second heat exchange section 19 is limited, the movement of the graphite box body 11 is not influenced, and the normal conveying of materials is ensured.
The inert gas protection mechanism continuously introduces inert gas into the heating channel 2, so that the air is placed in contact with the graphitized material to prevent the material from being oxidized, and the inert gas protection mechanism comprises an air inlet pipe 15 and an air outlet pipe 16. A plurality of air inlet pipes 15 are arranged, and the air inlet pipes 15 respectively penetrate through the cooling interlayer 12 to be communicated with the first constant temperature section 20 and the second constant temperature section 21 and are used for introducing inert gas; the number of the air outlet pipes 16 is multiple, and the air outlet pipes 16 penetrate through the graphitization furnace 1 and the heat preservation material 9 to be communicated with the heating section 17, so that the materials are prevented from being oxidized by air when heated at high temperature.
The utility model discloses when using, through placing the graphite box 11 that will load the material on graphite slide 10, and place it on feed end 5, promote graphite slide 10 by feeding impeller 8, come to send the material into heating channel 2 constantly, open electric heater 4, carry first heat transfer section 18 via first constant temperature section 20 at the material, the material absorbs the temperature of graphite box 11 that has already been graphitized on another transfer passage 3, when continuing to be carried heating section 17, the material is graphitized, the material after the graphitization is continued to be pushed to second heat transfer section 19, the high temperature of material is waited for by the graphitized graphite box 11 to absorb on another transfer passage 3, later is pushed to second constant temperature section 21 again, handle and accomplish; the continuous circulation can realize the continuous treatment of the materials.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a continuous graphitization device of binary channels cathode material, its characterized in that, including two feed mechanism, both ends respectively with two graphitization furnace (1) that feed mechanism links to each other, set up in heating channel (2) on two feed mechanism are placed respectively at graphitization furnace (1) and both ends, parallel arrangement in two transfer passage (3) in heating channel (2), set up in electric heater (4) that heating channel (2) middle section just is connected with external power source for load material and place a plurality of graphitization mechanism on transfer passage (3), adhere to two cooling mechanism that just are used for cooling graphitization mechanism are heated channel (2) both ends and are used for pushing up to heating channel (2) that are located graphitization furnace (1) hydraulic pressure pushing mechanism that pushes up.
2. The device for continuously graphitizing the anode material in two channels according to claim 1, wherein the two ends of the conveying channel (3) are a feeding end (5) and a discharging end (6), respectively, wherein the two conveying channels (3) are disposed in the heating channel (2) in an anti-parallel manner, and the feeding end (5) of one conveying channel (3) and the discharging end (6) of the other conveying channel (3) are located at one end of the heating channel (2) together.
3. The continuous graphitization device for the two-channel anode material is characterized in that the feeding mechanism comprises a support frame (7) used for supporting one end of the heating channel (2) and a feeding pusher (8) used for pushing the graphitization mechanism on the feeding end (5) in the end of the heating channel (2), wherein the cooling mechanism is installed on the support frame (7) and is used for cooling one end of the heating channel (2).
4. The continuous graphitization device for the double-channel anode material according to claim 3, wherein the interior of the graphitization furnace (1) is filled with a heat insulating material (9) for heat insulation around the heating channel (2).
5. The continuous graphitization device for the two-channel anode material is characterized in that the graphitization mechanism comprises a graphite sliding plate (10) which is placed on the conveying channel (3) and pushed by a feeding pusher (8), and a graphite box body (11) which is installed on the graphite sliding plate (10) and used for loading materials, wherein the feeding pusher (8) pushes the graphite sliding plate (10) to move the graphite box body (11) along with the graphite sliding plate.
6. The continuous graphitization device for the two-channel anode material is characterized in that the cooling mechanism comprises a cooling interlayer (12) attached to one end of the heating channel (2), and a cooling liquid inlet (13) and a cooling liquid outlet (14) arranged on the cooling interlayer (12), wherein the cooling interlayer (12) is connected with the graphitization furnace (1).
7. The continuous graphitization device for the two-channel anode material according to claim 6, wherein the heating channel (2) comprises a heating section (17) which is located in the middle of the graphitization furnace (1) and connected with the electric heater (4), a first heat exchange section (18) and a second heat exchange section (19) which are connected with two ends of the heating section (17) respectively and located in the graphitization furnace (1), a first constant temperature section (20) connected with the first heat exchange section (18), and a second constant temperature section (21) connected with the second heat exchange section (19), wherein the first constant temperature section (20) and the second constant temperature section (21) are located on two support frames (7) respectively, cooling interlayers (12) in the two cooling mechanisms are attached to the first constant temperature section (20) and the second constant temperature section (21) respectively, and the heat preservation material (9) surrounds the heating section (17), The first heat exchange section (18) and the second heat exchange section (19) are filled in the graphitizing furnace (1), and the hydraulic pushing mechanism is used for pushing the first heat exchange section (18), the second heat exchange section (19) and the heating section (17) tightly.
8. The device for continuously graphitizing the anode material in two paths according to claim 7, wherein the hydraulic pushing mechanism includes a pushing electrode (24) located between the first constant temperature section (20) and the first heat exchange section (18), a clamping block (22) located between the second constant temperature section (21) and the second heat exchange section (19), and a hydraulic pusher (23) for pushing the pushing electrode (24), wherein a path for accommodating the movement of the graphite sliding plate (10) and the graphite box body (11) is provided inside the pushing electrode (24) and the clamping block (22).
9. The device for continuously graphitizing the anode material in two passes according to claim 8, wherein the heating section (17), the first constant temperature section (20), and the second constant temperature section (21) are provided with an inert gas protection mechanism for performing gas protection on the graphite box (11).
10. The continuous graphitization device for the two-channel anode material according to claim 9, wherein the inert gas protection mechanism comprises a plurality of gas inlet pipes (15) respectively communicated with the first constant temperature section (20) and the second constant temperature section (21), and a plurality of gas outlet pipes (16) respectively communicated with the heating section (17), wherein the plurality of gas inlet pipes (15) are respectively communicated with the first constant temperature section (20) and the second constant temperature section (21) through the cooling interlayer (12), and the gas outlet pipes (16) are communicated with the heating section (17) through the graphitization furnace (1) and the heat insulating material (9).
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| CN202021488059.7U CN212769883U (en) | 2020-07-24 | 2020-07-24 | Binary channels negative pole material graphitizes device in succession |
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| CN202021488059.7U CN212769883U (en) | 2020-07-24 | 2020-07-24 | Binary channels negative pole material graphitizes device in succession |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113845113A (en) * | 2021-10-26 | 2021-12-28 | 金先奎 | Continuous high-temperature graphitization and purification method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845113A (en) * | 2021-10-26 | 2021-12-28 | 金先奎 | Continuous high-temperature graphitization and purification method |
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Address after: 012300 Changda logistics park, luqiaoping, qiaying Town, Zhuozi County, Wulanchabu City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Zichen Xingfeng New Energy Technology Co.,Ltd. Address before: 012300 Changda logistics park, luqiaoping, qiaying Town, Zhuozi County, Wulanchabu City, Inner Mongolia Autonomous Region Patentee before: Inner Mongolia Xingfeng New Energy Technology Co.,Ltd. |