CN215771463U - Electrolyte filling device for battery production - Google Patents
Electrolyte filling device for battery production Download PDFInfo
- Publication number
- CN215771463U CN215771463U CN202121494273.8U CN202121494273U CN215771463U CN 215771463 U CN215771463 U CN 215771463U CN 202121494273 U CN202121494273 U CN 202121494273U CN 215771463 U CN215771463 U CN 215771463U
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- China
- Prior art keywords
- electrolyte
- sealing
- workbench
- seal box
- box
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 86
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 238000001802 infusion Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 230000010412 perfusion Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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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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- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model provides an electrolyte filling device for battery production, which comprises a workbench, a first electrolyte filling device, a second electrolyte filling device and a control device, wherein the workbench is arranged on the workbench; the support frame is fixedly arranged at the top of the workbench; the sealing box is fixedly arranged at the bottom ends of the four fixing rods; the vacuum pump is fixedly arranged at the top of the support frame; the lifting mechanism is arranged at the top of the workbench and is positioned right below the seal box; the fixing mechanism is arranged on the workbench and is positioned on one side of the support frame; the infusion mechanism is arranged on the workbench. The electrolyte filling device for battery production provided by the utility model has the advantages of less harm to human bodies, capability of reducing electrolyte waste and high filling efficiency.
Description
Technical Field
The utility model relates to the technical field of battery production, in particular to an electrolyte filling device for battery production.
Background
The electrolyte is a broad term, and the content represented by the electrolyte is greatly different when the electrolyte is used in different industries. There are electrolytes (also called electrolytes) in organisms, and also electrolytes applied to the battery industry, and electrolytes in industries such as electrolytic capacitors, super capacitors and the like, and most of the electrolytes are used in the battery industry.
Need pour into electrolyte into in the battery during battery production, because electrolyte is volatile toxic gas in the air, consequently need the contact of minimize electrolyte and air when pouring, however, common mode of filling is mostly pipeline filling, and people often directly pass through the pipe input battery with electrolyte in the air when filling, do not notice the separation air, and harm that produces the human body is great in long-term operation.
Therefore, it is necessary to provide a new electrolyte filling device for battery production to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model solves the technical problem of providing the electrolyte perfusion device for the battery production, which has the advantages of less harm to the human body, capability of reducing the waste of the electrolyte and high perfusion efficiency.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
the utility model provides an electrolyte perfusion device for battery production, which comprises: a work table; the support frame is fixedly arranged at the top of the workbench; the four fixing rods are all fixedly arranged on the inner wall of the top of the supporting frame; the sealing box is fixedly arranged at the bottom ends of the four fixing rods; the operation opening is formed in one side of the seal box; the pressure relief hole is formed in one side of the seal box; the vacuum pump is fixedly arranged at the top of the support frame; the air exhaust pipe is fixedly arranged on the air inlet end of the vacuum pump, and an air inlet of the air exhaust pipe extends into the seal box; the lifting mechanism is arranged at the top of the workbench and is positioned right below the seal box; the object placing plate is arranged at the top of the lifting mechanism; the fixing mechanism is arranged on the workbench and is positioned on one side of the support frame; the infusion mechanism is arranged on the workbench.
As a further scheme of the utility model, the fixing mechanism comprises two positioning plates, a sealing frame, two positioning strips, a plurality of clamping grooves and two bolts, wherein the two positioning plates are both fixedly arranged at the top of the workbench, the two positioning plates are respectively positioned at the two sides of the sealing box and are fixedly connected with the sealing box, one sides of the two positioning plates which are close to each other are respectively contacted with the two sides of the object placing plate, the sealing frame is fixedly arranged at the top of the object placing plate and is matched with the sealing box, the two positioning strips are both arranged at the top of the object placing plate in a sliding way, and two the location strip all is located in the sealing frame, it is a plurality of the draw-in groove is all seted up put the top of thing board, two the bolt is installed respectively on two the location strip, two the bolt respectively with a plurality of draw-in groove looks adaptation.
As a further proposal of the utility model, the transfusion mechanism comprises an electrolyte tank, a liquid injection port, a scale observation window, a water pump, a transfusion tube, a mounting tube and a plurality of universal tubes, the electrolyte tank is arranged at the top of the workbench and positioned at one side of the support frame, the liquid injection port is arranged at the top of the electrolyte tank, the scale observation window is arranged on one side of the electrolyte tank, the water pump is fixedly arranged on the top of the electrolyte tank, the infusion tube is arranged on the water pump, the liquid inlet of the infusion tube extends into the electrolyte tank, and the liquid outlet of the infusion tube extends into the seal box, the installation tube is arranged in the seal box, and the liquid inlet of the installation pipe is fixedly connected with the liquid outlet of the infusion pipe, the universal pipes are all arranged in the seal box, and the liquid inlets of the universal pipes are fixedly connected with the installation pipe.
As a further scheme of the utility model, the sealing box is made of glass, the bottom of the sealing box is provided with an opening, and one side of the sealing box, which is positioned at the operation opening, is provided with a sealing door which is matched with the operation opening.
As a further scheme of the utility model, a sealing cover is installed in the pressure relief hole in a threaded mode, and the sealing cover is matched with the pressure relief hole.
As a further scheme of the utility model, a plurality of tube clamps are arranged on the infusion tube, the tube clamps are fixedly connected with the support frame, the sides of the two positioning strips, which are close to each other, are inclined planes, and the tops of the two inclined planes are both arc-shaped.
The utility model provides an electrolyte perfusion device for battery production, which has the beneficial effects that:
the battery to be filled can be moved into the seal box through the lifting mechanism, the seal box is conveniently sealed at the same time, the vacuum pump is favorable for vacuumizing the seal box, the contact between electrolyte and air during filling can be reduced by filling under a vacuum state, the battery to be filled can be fixed on the object placing plate through the fixing mechanism, the battery is not easy to move, the leakage of the electrolyte during filling can be reduced, the pollution is reduced, the workload of post-processing waste electrolyte can be reduced, meanwhile, the inclined planes on the two positioning strips can play a good guiding role during placing the battery, the placing position of the battery is more accurate, the electrolyte can be filled into the battery through a pipeline through the infusion mechanism, the contact between the electrolyte and people is reduced, and the harm of toxic gas generated by the volatilization of the electrolyte to the human body is reduced, the material of the sealing box is glass, so that the condition in the box can be simply and visually observed, the filling work is convenient, the bottom of the sealing box is sealed in a clamping mode, the operation is convenient, the working procedures are reduced, the sealing effect is good, the operation opening is arranged on the seal box and the door matched with the operation opening is arranged on the seal box, so that the universal pipes can be conveniently aligned with the batteries, the leakage of electrolyte is reduced, the utilization rate of the electrolyte is improved, the pipeline is fixed on the supporting frame and the sealing box by arranging a plurality of pipe clamps on the infusion pipe, also can reduce the cracked risk of pipeline when making things convenient for electrolyte transmission, through with a plurality of universal pipe evenly sets up on the installation pipe, avoid winding because of the pipeline distance is too near, increase the work load of filling work.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electrolyte perfusion apparatus for battery production according to a preferred embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of the external structure of the electrolyte tank of the present invention.
Reference numbers in the figures: 1. a work table; 2. a support frame; 3. fixing the rod; 4. a sealing box; 5. positioning a plate; 6. an operation port; 7. a pressure relief vent; 8. a vacuum pump; 9. an air exhaust pipe; 10. a lifting mechanism; 11. a storage plate; 12. a sealing frame; 13. a positioning bar; 14. a card slot; 15. a bolt; 16. an electrolyte tank; 17. a liquid injection port; 18. a scale observation window; 19. a water pump; 20. a transfusion tube; 21. installing a pipe; 22. a universal tube.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1 to 3, an electrolyte filling apparatus for battery production according to an embodiment of the present invention includes: a work table 1; the support frame 2 is fixedly arranged at the top of the workbench 1; the four fixing rods 3 are all fixedly arranged on the inner wall of the top of the support frame 2; the sealing box 4 is fixedly arranged at the bottom ends of the four fixing rods 3; the operation opening 6 is formed in one side of the seal box 4; the pressure relief hole 7 is formed in one side of the seal box 4; the vacuum pump 8 is fixedly arranged at the top of the support frame 2; the air exhaust pipe 9 is fixedly arranged on the air inlet end of the vacuum pump 8, and the air inlet of the air exhaust pipe 9 extends into the seal box 4; the lifting mechanism 10 is arranged at the top of the workbench 1, and the lifting mechanism 10 is positioned right below the seal box 4; the object placing plate 11 is arranged at the top of the lifting mechanism 10; the fixing mechanism is arranged on the workbench 1 and is positioned on one side of the support frame 2; and the infusion mechanism is arranged on the workbench 1.
The fixing mechanism comprises two positioning plates 5, a sealing frame 12, two positioning strips 13, a plurality of clamping grooves 14 and two bolts 15, wherein the two positioning plates 5 are fixedly arranged at the top of the workbench 1, the two positioning plates 5 are respectively positioned at two sides of the sealing box 4 and fixedly connected with the sealing box 4, one sides of the two positioning plates 5 close to each other are respectively contacted with two sides of the object placing plate 11, the sealing frame 12 is fixedly arranged at the top of the object placing plate 11 and matched with the sealing box 4, the two positioning strips 13 are slidably arranged at the top of the object placing plate 11, the two positioning strips 13 are positioned in the sealing frame 12, the plurality of clamping grooves 14 are arranged at the top of the object placing plate 11, the two bolts 15 are respectively arranged on the two positioning strips 13, and the two bolts 15 are respectively matched with the plurality of clamping grooves 14, through fixed establishment can fix the battery that needs were filled on putting thing board 11, the difficult removal of battery can reduce electrolyte and take place to leak when filling to reduce pollution also can reduce the work load of post processing abandonment electrolyte, inclined plane on two location strips 13 also plays good guide effect when placing the battery simultaneously, makes it place the position comparatively accurate.
Infusion mechanism includes electrolyte tank 16, notes liquid mouth 17, scale observation window 18, water pump 19, transfer line 20, installation pipe 21 and a plurality of universal pipe 22, electrolyte tank 16 sets up the top of workstation 1 is located one side of support frame 2, it sets up to annotate liquid mouth 17 the top of electrolyte tank 16, scale observation window 18 sets up one side of electrolyte tank 16, water pump 19 fixed mounting be in electrolyte tank 16's top, transfer line 20 sets up on water pump 19, the inlet of transfer line 20 extends into in electrolyte tank 16, just the liquid outlet of transfer line 20 extends into in seal box 4, installation pipe 21 sets up in seal box 4, just the inlet of installation pipe 21 with the liquid outlet fixed connection of transfer line 20, it is a plurality of universal pipe 22 all sets up in seal box 4, and it is a plurality of universal pipe 22 the inlet all with installation pipe 21 fixed connection, through infusion mechanism can pour into the battery with electrolyte through the pipeline, reduces electrolyte and people's contact, reduces the harm of the poisonous gas that electrolyte volatilizees the production to the human body.
The material of seal box 4 is glass, just the bottom of seal box 4 is the opening, seal box 4 is located one side of operation mouth 6 is provided with the sealing door, the sealing door with operation mouth 6 looks adaptation, through set up on the seal box 4 operation mouth 6 just is provided with the door of looks adaptation with it, and is convenient a plurality of universal pipe 22 aligns with the battery to reduce the leakage of electrolyte, improve the utilization ratio of electrolyte.
The pressure relief hole 7 is internally provided with a sealing cover, the sealing cover is matched with the pressure relief hole 7, and the inclined planes on the two positioning strips 13 also play a good role in guiding when a battery is placed, so that the placing position of the battery is accurate.
Be provided with a plurality of pipe clamps on transfer line 20, it is a plurality of the pipe clamp all with 2 fixed connection of support frame, two one side that location strip 13 is close to each other is the inclined plane, two the top on inclined plane all is the arc, through set up a plurality of pipe clamps on the transfer line 20, fix the pipeline support frame 2 with on seal box 4, also can reduce the cracked risk of pipeline when making things convenient for electrolyte transmission.
The working principle of the electrolyte perfusion device for battery production provided by the utility model is as follows:
during the use, keep annotating liquid mouth 17 for the tight state earlier, observe next scale observation window 18, ensure electrolyte in the electrolyte case 16 reaches the scale that can carry out the pouring, place the battery that needs to carry out electrolyte pouring on putting the thing board 11, later according to the size adjustment two of needing to pour the battery location strip 13, bolt 15 is gone on loosely during the adjustment and is break away from putting thing board 11 and can freely remove location strip 13, later according to battery size selection corresponding draw-in groove 14 fix can, lead to the battery through the slope on location strip 13 when placing the battery, make it can accurately place in preset position, the deviation appears in the prevention, lead to annotating the liquid deviation, two location strip 13 can avoid its emergence to rock after the battery is placed in place, guarantee its stability;
during liquid injection, firstly, a motor in the lifting mechanism 10 is started, so that the lifting mechanism 10 moves to push the object placing plate 11 to stably slide and ascend along the two positioning plates 5, when the top of the object placing plate 11 is contacted with the bottom of the seal box 4, the lifting mechanism 10 stops moving, the seal frame 12 is positioned in the seal box 4 and is tightly attached to the inner wall of the seal box 4 at the moment, so that one seal is formed by attaching the object placing plate 11 to the seal box 4, and two seals are formed by attaching the seal frame 12 to the inner wall of the seal box 4, so that the seal effect is effectively ensured;
during liquid injection, the operation port 6 is opened, the infusion ports of the universal pipes 22 are aligned with the infusion ports of the batteries one by one through manual operation, the operation port 6 is closed after alignment, the pressure release hole 7 is ensured to be in a closed state, and then the vacuum pump 8 is started to pump air in the seal box 4 completely, so that the seal box 4 is kept in a vacuum state;
then, the water pump 19 is turned on, electrolyte is filled into the battery through the liquid conveying mechanism, whether the filling of the battery is finished or not can be observed through the seal box 4 made of glass, after the filling is finished, the water pump 19 is turned off, then the pressure relief hole 7 is turned on, air enters the seal box 4, the seal box 4 is conveniently separated from the lifting mechanism 10, and a liquid conveying port of the battery is sealed while the air is separated;
and (3) loosening the two bolts 15 while the lifting mechanism 10 falls, taking down the battery after filling, replacing the battery with another battery which is not filled, and repeating the operations to fill the electrolyte during the production of the battery.
Compared with the related art, the electrolyte perfusion device for battery production provided by the utility model has the following beneficial effects:
the utility model provides an electrolyte filling device for battery production, which can move a battery to be filled into a sealing box 4 through a lifting mechanism 10, simultaneously conveniently seal the sealing box 4, is beneficial to a vacuum pump 8 to vacuumize the sealing box 4, can reduce the contact of the electrolyte with air during filling in a vacuum state, can fix the battery to be filled on a placing plate 11 through a fixing mechanism, is not easy to move, can reduce the leakage of the electrolyte during filling so as to reduce pollution, can also reduce the workload of post-treatment of waste electrolyte, simultaneously has good guiding function when the battery is placed by inclined planes on two positioning strips 13, ensures that the placing position of the battery is more accurate, and can fill the electrolyte into the battery through a pipeline through a transfusion mechanism, reduce the contact of electrolyte and people, reduce the harm of the poison gas that the electrolyte volatilizees and produce to the human body, through setting up the material of seal box 4 into glass, can simply that directly perceivedly observe the incasement condition, conveniently carry out the filling work, set up the bottom of seal box 4 to seal with the chucking mode and can conveniently operate, reduce the working procedure and sealed effectual, through set up on the seal box 4 operation mouth 6 and be provided with the door of looks adaptation with it, conveniently aim at a plurality of universal pipe 22 and battery, in order to reduce the leakage of electrolyte, improve the utilization ratio of electrolyte, through set up a plurality of pipe clamps on the transfer line 20, fix the pipeline on support frame 2 with on seal box 4, also can reduce the cracked risk of pipeline when making things convenient for the electrolyte transmission, through set up a plurality of universal pipe 22 evenly on installation tube 21, avoid winding because of pipeline distance is too close, increase the work load of filling work.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. An electrolyte solution filling device for battery production, comprising:
a work table;
the support frame is fixedly arranged at the top of the workbench;
the four fixing rods are all fixedly arranged on the inner wall of the top of the supporting frame;
the sealing box is fixedly arranged at the bottom ends of the four fixing rods;
the operation opening is formed in one side of the seal box;
the pressure relief hole is formed in one side of the seal box;
the vacuum pump is fixedly arranged at the top of the support frame;
the air exhaust pipe is fixedly arranged on the air inlet end of the vacuum pump, and an air inlet of the air exhaust pipe extends into the seal box;
the lifting mechanism is arranged at the top of the workbench and is positioned right below the seal box;
the object placing plate is arranged at the top of the lifting mechanism;
the fixing mechanism is arranged on the workbench and is positioned on one side of the support frame;
the infusion mechanism is arranged on the workbench.
2. The electrolyte perfusion apparatus for battery production according to claim 1, wherein the fixing mechanism includes two positioning plates, a sealing frame, two positioning bars, a plurality of slots, and two bolts, the two positioning plates are both fixedly mounted on the top of the worktable, the two positioning plates are respectively located on two sides of the sealing box and are fixedly connected to the sealing box, one sides of the two positioning plates close to each other are respectively in contact with two sides of the object placing plate, the sealing frame is fixedly mounted on the top of the object placing plate and is adapted to the sealing box, the two positioning bars are both slidably mounted on the top of the object placing plate, the two positioning bars are both located in the sealing frame, the plurality of slots are all opened on the top of the object placing plate, and the two bolts are respectively mounted on the two positioning bars, the two bolts are respectively matched with the clamping grooves.
3. The electrolyte perfusion apparatus for battery production according to claim 2, wherein the infusion mechanism comprises an electrolyte tank, an infusion port, a graduated observation window, a water pump, an infusion tube, a mounting tube and a plurality of universal tubes, the electrolyte tank is disposed at the top of the worktable and located at one side of the support frame, the infusion port is opened at the top of the electrolyte tank, the graduated observation window is disposed at one side of the electrolyte tank, the water pump is fixedly mounted at the top of the electrolyte tank, the infusion tube is disposed on the water pump, a liquid inlet of the infusion tube extends into the electrolyte tank, a liquid outlet of the infusion tube extends into the seal box, the mounting tube is disposed in the seal box, and a liquid inlet of the mounting tube is fixedly connected with the liquid outlet of the infusion tube, and the universal tubes are disposed in the seal box, and a plurality of liquid inlets of the universal pipes are fixedly connected with the mounting pipe.
4. The electrolyte perfusion device for battery production according to claim 1, wherein the sealing box is made of glass, the bottom of the sealing box is an opening, and a sealing door is arranged on one side of the sealing box, which is located at the operation opening, and the sealing door is matched with the operation opening.
5. The electrolyte perfusion apparatus for battery production as recited in claim 1, wherein a cover is threadedly mounted in the pressure relief hole, the cover being fitted to the pressure relief hole.
6. The electrolyte perfusion device for battery production according to claim 3, wherein the infusion tube is provided with a plurality of tube clamps, the tube clamps are all fixedly connected with the support frame, one sides of the two positioning strips, which are close to each other, are inclined surfaces, and the tops of the two inclined surfaces are both arc-shaped.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121494273.8U CN215771463U (en) | 2021-07-02 | 2021-07-02 | Electrolyte filling device for battery production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121494273.8U CN215771463U (en) | 2021-07-02 | 2021-07-02 | Electrolyte filling device for battery production |
Publications (1)
Publication Number | Publication Date |
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CN215771463U true CN215771463U (en) | 2022-02-08 |
Family
ID=80103465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202121494273.8U Expired - Fee Related CN215771463U (en) | 2021-07-02 | 2021-07-02 | Electrolyte filling device for battery production |
Country Status (1)
Country | Link |
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CN (1) | CN215771463U (en) |
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2021
- 2021-07-02 CN CN202121494273.8U patent/CN215771463U/en not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220208 |