CN216719995U - Preparation system of battery pole piece - Google Patents
Preparation system of battery pole piece Download PDFInfo
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- CN216719995U CN216719995U CN202220311093.XU CN202220311093U CN216719995U CN 216719995 U CN216719995 U CN 216719995U CN 202220311093 U CN202220311093 U CN 202220311093U CN 216719995 U CN216719995 U CN 216719995U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to the technical field of battery pole piece manufacturing, and particularly provides a battery pole piece manufacturing system which comprises an unreeling device, a coating device, a protection device and a reeling device; the unwinding device is used for opening a battery pole piece in a winding state and sending the battery pole piece out downstream, the coating device is used for coating an in-situ curing precursor solution on the surface of the battery pole piece, the protection device seals the coating device and limits a natural adsorption material feeding path, the winding device is used for winding and retracting the battery pole piece which adsorbs the in-situ curing precursor solution, and the length of the natural adsorption material feeding path is set to enable the in-situ curing precursor solution coated on the battery pole piece to be fully adsorbed on the battery pole piece. Through such setting, the in situ solidification precursor solution fully adsorbs to battery pole piece surface in protector, can not only improve the adsorption quality of in situ solidification precursor solution, can also avoid the volatile material in the solution to dissipate to the surrounding environment in.
Description
Technical Field
The utility model relates to the technical field of battery pole piece manufacturing, and particularly provides a preparation system of a battery pole piece.
Background
With the continuous progress of the new energy automobile industry, the requirements of new energy vehicles on the performance of batteries are higher and higher. In the present stage, in view of the fact that many practical problems faced by large-scale mass production of solid-state batteries cannot be broken through in a short period, the new energy automobile has more urgent demands on high-safety and high-energy-density power batteries, and as a compromise scheme, a semi-solid lithium battery becomes a better choice in a short period. In order to improve the safety performance of the semi-solid lithium battery by reducing the amount of the electrolyte as much as possible, in-situ-cured precursors are widely used as safe electrolytes in the semi-solid lithium battery. However, in the existing battery pole piece manufacturing method, on one hand, the coating of the in-situ curing precursor solution is performed in an open environment, which causes volatile substances in the in-situ curing precursor solution to diffuse into the surrounding environment, and on the other hand, the coated battery pole piece is directly sent to a heating device for heating and curing, which causes poor bonding quality between the battery pole piece and the in-situ curing precursor, and finally causes non-ideal performance of the manufactured battery pole piece.
Accordingly, there is a need in the art for a new solution to the above problems.
SUMMERY OF THE UTILITY MODEL
The method aims to solve or relieve the problems in the prior art, namely the problems that an in-situ curing precursor solution coated on the surface of the battery pole piece is volatile and has low adsorption quality are solved.
The utility model provides a preparation system of a battery pole piece, which comprises the following components: the unwinding device is used for opening the battery pole piece in a winding state and sending the battery pole piece out downstream; the coating device is arranged at the downstream of the unreeling device and used for coating in-situ curing precursor solution on the surface of the battery pole piece; a guard enclosing the coating device and defining a natural adsorption take-off path for the battery pole pieces; the winding device is arranged at the downstream of the protection device and used for winding and retracting the battery pole piece adsorbed with the in-situ curing precursor solution; wherein the length of the natural adsorption material walking path is set to enable the in-situ solidified precursor solution coated on the battery pole piece to be sufficiently adsorbed on the battery pole piece in a natural state.
In the preferable technical scheme of the above preparation system for the battery pole piece, the protection device is a protection cover with a closed cavity, one end of the protection cover is provided with a first opening for the battery pole piece to enter, the other end of the protection cover is provided with a second opening for the battery pole piece to exit, and the natural adsorption material conveying path is located between the first opening and the second opening.
In a preferred embodiment of the above system for manufacturing a battery electrode sheet, the coating device is disposed near the first opening.
In a preferred technical solution of the above system for preparing a battery pole piece, the system further includes a low-temperature drying device located downstream of the protection device, and the low-temperature drying device is configured to remove an in-situ solidification precursor solution remaining on the surface of the battery pole piece.
In a preferred technical solution of the above system for preparing a battery pole piece, a fan is disposed in the low-temperature drying device, and the fan exhausts air in the low-temperature drying device to the outside so that the interior of the low-temperature drying device is in a negative pressure environment.
In a preferred technical scheme of the preparation system of the battery pole piece, the coating device is a single-sided or double-sided gravure coater or a slit coater.
In a preferred technical solution of the above system for preparing a battery pole piece, the system further includes a heating device, and the winding device is located in the heating device.
In a preferred technical solution of the above system for manufacturing a battery pole piece, the system further includes a conveying mechanism disposed between the unwinding device and the coating device and/or between the protection device and the winding device.
In an optimal technical scheme of the preparation system for the battery pole piece, the preparation system further comprises a tension adjusting mechanism and a deviation rectifying mechanism, and the tension adjusting mechanism and the deviation rectifying mechanism are arranged between the unwinding device and the coating device and/or between the protection device and the winding device.
The preparation system of the battery pole piece comprises an unreeling device, a coating device, a protection device and a reeling device; the unwinding device is used for opening a battery pole piece in a winding state and sending the battery pole piece out downstream, the coating device is used for coating an in-situ curing precursor solution on the surface of the battery pole piece, the protection device seals the coating device and limits a natural adsorption material feeding path of the battery pole piece, the winding device is used for winding and retracting the battery pole piece which adsorbs the in-situ curing precursor, and the length of the natural adsorption material feeding path is set to enable the in-situ curing precursor solution coated on the battery pole piece to be fully adsorbed on the battery pole piece in a natural state. Through such setting, the in situ solidification precursor solution can fully adsorb to battery pole piece surface in protector, can not only improve the adsorption quality of in situ solidification precursor solution, can also avoid the volatile material in the solution to spread in the surrounding environment and avoid the impurity adhesion in the environment to battery pole piece surface.
Further, the protection device is a protection cover with a closed cavity, a first opening is formed in one end of the protection cover, a second opening is formed in the other end of the protection cover, and the natural adsorption material conveying path is located between the first opening and the second opening. Through the arrangement, the battery pole piece enters the protective device through the first opening, then is coated with the in-situ curing precursor solution, then moves along a section of path in a natural state, so that the in-situ curing precursor solution is fully adsorbed on the battery pole piece, and finally the battery pole piece leaves the protective device through the second opening.
Further, the preparation system also comprises a low-temperature drying device which is positioned at the downstream of the protection device and can remove the in-situ solidified precursor solution remained on the surface of the battery pole piece. Through the arrangement, the in-situ solidified precursor solution still remained on the surface of the battery pole piece after the natural adsorption material-conveying path is finished is removed, and the adsorption quality of the in-situ solidified precursor on the battery pole piece is further improved.
Furthermore, a fan is arranged in the low-temperature drying device, and when the fan discharges the air in the low-temperature drying device to the outside, the interior of the low-temperature drying device is in a negative pressure environment. Through the arrangement, the drying speed of the solution on the surface of the battery pole piece can be accelerated, and the curing efficiency of the solution on the surface of the battery pole piece is improved.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a system for manufacturing a battery electrode sheet according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a system for preparing a battery pole piece according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a system for manufacturing a battery electrode sheet according to a third embodiment of the present invention;
fig. 4 is a schematic view of a system for manufacturing a battery electrode sheet according to a fourth embodiment of the present invention.
List of reference numerals:
1. an unwinding device; 10. a first set of conveyor rollers; 21. a single-sided gravure coater; 22. a single-sided slit coater; 23. a double-sided gravure coater; 24. a double-sided slit coater; 3. a guard; 31. a first opening; 32. a second opening; 4. a low temperature drying device; 50. a second set of conveyor rollers; 5. a winding device; 6. a battery pole piece; l, naturally adsorbing the material conveying path.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "horizontal", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that a device or an element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, a system for manufacturing a battery pole piece according to a first embodiment of the present invention includes an unwinding device 1, a single-sided gravure coater 21, a protection device 3, and a winding device 5; the unwinding device 1 is used for opening the battery pole piece 6 in a winding state and sending the battery pole piece 6 out downstream; the single-sided gravure coater 21 is arranged at the downstream of the unwinding device 1 and is used for coating an in-situ curing precursor solution on the surface of the battery pole piece 6; the protective device 3 closes the coating device 21 and defines a natural adsorption material-feeding path L of the battery pole piece 6; the winding device 5 is arranged at the downstream of the protection device 3 and used for winding and retracting the battery pole piece 6 which adsorbs the in-situ solidification precursor solution, and the length of the natural adsorption material walking path L is set to enable the in-situ solidification precursor solution coated on the battery pole piece 6 to be fully adsorbed on the battery pole piece 6 in a natural state.
Illustratively, as shown in fig. 1, when the unwinding device 1 sends the battery pole piece 6 downstream, the battery pole piece 6 enters the protection device 3, passes through the single-sided gravure coater 21, and finally reaches the winding device 5 to complete the winding operation. The protective device 3 is internally provided with a natural adsorption material feeding path L for the battery pole piece 6 to walk, the single-sided gravure coating machine 21 is arranged in a cavity of the protective device 3, when the battery pole piece 6 walks downstream at a balanced speed, the in-situ solidification precursor solution is attached to the surface of the battery pole piece 6 after the battery pole piece 6 passes through the single-sided gravure coating machine 21, then the battery pole piece 6 walks along the natural adsorption material feeding path L, and before the battery pole piece 6 leaves the protective device 3, the in-situ solidification precursor solution can be fully adsorbed to the battery pole piece 6 in a natural state.
It should be noted that the length of the natural absorption material-transporting path L in the protection device 3 can be adjusted according to the amount of the solution applied or the material-transporting speed of the battery pole piece 6, for example, when the amount of the solution applied on the surface of the battery pole piece 6 is large and the battery pole piece 6 transports at a predetermined speed, the length of the natural absorption material-transporting path L can be increased to increase the absorption time of the in-situ solidified precursor solution on the battery pole piece; when the amount of the solution coated on the surface of the battery pole piece 6 is small, the length of the natural absorption material-moving path L can be properly reduced, that is, the in-situ solidification precursor solution can be fully absorbed by the surface of the battery pole piece 6 in a natural state before the battery pole piece 6 enters the next device. For example, the battery pole piece 6 is fed at a speed of 0.1 m/s, more in-situ cured precursor solution is coated on the battery pole piece 6, the solution can be fully absorbed within 30 s as a reference, and the length of the natural absorption feeding path L can be set within a range of about 3 m; less in-situ curing precursor solution is coated on the battery pole piece 6, the solution is fully absorbed within 15 seconds as reference, and the length of the natural absorption material-moving path L can be set within the range of about 1.5 meters. The proper amount of in-situ curing precursor solution is coated on the battery pole piece 6, the solution can be fully absorbed within 20 seconds as reference, and when the battery pole piece 6 is fed at the speed of 0.2 m/s, the length of a natural absorption feeding path L can be set within the range of about 4 m. In practical applications, the length of the natural absorption feeding path L can be flexibly set according to the production environment and conditions to adjust the amount of the coating solution and the feeding speed of the battery plate 6, and such adjustment and change of the length of the natural absorption feeding path L do not depart from the principle and scope of the present invention and should be limited within the protection scope of the present invention.
As mentioned above, the coating device in fig. 1 is configured in particular as a single-sided gravure coater 21, which comprises a coating roller and two backing rollers, the coating roller being arranged opposite the two backing rollers, wherein the two backing rollers are arranged on both sides of the coating roller. When the battery pole piece 6 enters the single-sided gravure coater 21 in the horizontal direction, the coating roller contacts the upper surface of the battery pole piece 6, and the two support rollers contact the lower surface of the battery pole piece 6. When the battery pole piece 6 travels between the coating roller and the two support rollers at a constant speed, the coating roller can cling to the surface of the battery pole piece 6 so as to roll and coat the in-situ cured precursor solution on the coating roller on the upper surface of the battery pole piece 6, and the work of coating the in-situ cured precursor solution on one surface of the battery pole piece 6 is completed.
The second embodiment of fig. 2 differs from the first embodiment of fig. 1 in the type of coating device. Specifically, the coating apparatus of fig. 2 is provided as a single-sided slot coater 22 comprising a nozzle and a backing roll, the nozzle and the backing roll forming a slot therebetween for the battery pole piece 6 to travel through. When the battery pole piece 6 horizontally passes through the slit between the nozzle and the support roller, the support roller is in contact with the lower surface of the battery pole piece 6, and correspondingly, the nozzle positioned above the battery pole piece 6 sprays the in-situ curing precursor solution to the upper surface of the battery pole piece 6, so that the work of coating the in-situ curing precursor solution on one surface of the battery pole piece 6 is completed.
Similarly, the third embodiment of fig. 3 also differs from the first embodiment of fig. 1 and 2 in the type of coating device. Specifically, the coating device in fig. 3 is provided as a double-sided gravure coater 23 including two coating rolls disposed opposite to each other, wherein the two coating rolls are in contact with the upper surface and the lower surface of the battery pole piece 6, respectively, when the battery pole piece 6 enters the double-sided gravure coater 23 in the horizontal direction. The two coating rollers rotate relatively to coat the in-situ curing precursor solution on the coating rollers on two side surfaces of the battery pole piece 6 at the same time, and the work of coating the in-situ curing precursor solution on two surfaces of the battery pole piece 6 is completed.
Similarly, the fourth embodiment of fig. 4 also differs from the first embodiment of fig. 1-3 in the type of coating device. In particular, the coating device in fig. 4 is provided as a double-sided slot coater 24 comprising two oppositely arranged nozzles between which a slot is formed for the battery pole piece 6 to run through. When the battery pole piece 6 enters the double-sided slit coating machine 24 along the horizontal direction, and the battery pole piece 6 passes through a slit area between two nozzles at a constant speed, the two nozzles simultaneously spray the in-situ curing precursor solution on the surfaces of the two sides of the battery pole piece 6, so that the work of coating the in-situ curing precursor solution on the two sides of the battery pole piece 6 is completed.
Preferably, as shown in fig. 1 to 4, the protection device 3 is a protection cover with a closed chamber, one end of the protection cover is provided with a first opening 31 for the battery pole piece 6 to enter, the other end of the protection cover is provided with a second opening 32 for the battery pole piece 6 to exit, and the natural absorption material conveying path L is located between the first opening 31 and the second opening 32.
Specifically, the first opening 31 and the second opening 32 may be configured as long and narrow strip-shaped openings to match the entrance and exit of the battery pole piece 6, so as to better maintain the sealing state of the protection device 3, and a natural absorption material-conveying path L for the battery pole piece 6 to travel is formed between the first opening 31 and the second opening 32. More specifically, the natural adsorption material feeding path L is formed between the coating device and the second opening 32, after the battery pole piece 6 enters the protective cover 3 through the first opening 31, the battery pole piece first passes through the coating device arranged near the first opening 31, the coating device enables the surface of the battery pole piece 6 to be attached with the in-situ solidification precursor solution, and then, due to the existence of the natural adsorption material feeding path L, the in-situ solidification precursor solution can be fully adsorbed to the surface of the battery pole piece 6 in the protective cover 3, so that not only can the adsorption quality of the in-situ solidification precursor solution be improved, but also the volatile substances in the solution can be prevented from being diffused to the surrounding environment and impurities in the environment can be prevented from being adhered to the surface of the battery pole piece 6.
Preferably, as shown in fig. 1 to 4, the preparation system of the present invention further comprises a low-temperature drying device 4 located downstream of the protection device 3, wherein the low-temperature drying device 4 is used for removing the in-situ solidified precursor solution remained on the surface of the battery pole piece 6.
Specifically, a compression refrigerator is provided in the cryogenic drying device 4, and the temperature in the chamber of the cryogenic drying device 4 is adjusted by the compression refrigerator. In the operating state, the temperature in the low-temperature drying device 4 is maintained at about 40 degrees. When the battery pole piece 6 exits from the protective cover 3 through the second opening 32, the battery pole piece 6 directly enters the chamber of the low-temperature drying device 4 for drying, and because a part of uncured in-situ cured precursor solution may exist on the surface of the battery pole piece 6, when the battery pole piece 6 passes through the low-temperature drying device 4, a solvent in the in-situ cured precursor solution can be rapidly volatilized in the chamber of the low-temperature drying device 4, so that the curing of the in-situ cured precursor solution remaining on the surface of the battery pole piece 6 is accelerated, and the bonding of the remaining in-situ cured precursor solution between adjacent pole piece layers is avoided when the battery pole piece 6 enters the winding device 5 for winding.
Preferably, a fan (not shown in the figure) is disposed in the low-temperature drying device 4, and the fan exhausts the air in the low-temperature drying device 4 to the outside so as to make the interior of the low-temperature drying device 4 present a negative pressure environment, so as to exhaust the volatilized solvent from the inside of the cavity of the low-temperature drying device 4 to the outside, accelerate the drying speed of the in-situ curing precursor solution on the surface of the battery pole piece 6, and improve the curing efficiency of the solution on the surface of the battery pole piece 6.
Alternatively, an exhaust channel may be disposed in the low-temperature drying device 4, and the solvent volatilized from the in-situ solidified precursor solution on the surface of the battery pole piece 6 in the low-temperature drying device 4 is exhausted to a designated outdoor area through the exhaust channel.
Preferably, the preparation system of the present invention further includes a heating device (not shown in the drawings), and particularly in the third embodiment of fig. 3 and the fourth embodiment of fig. 4, since both sides of the battery pole piece 6 are coated with the in-situ curing precursor solution, the winding device 5 can be directly disposed in the heating device, so as to directly heat and cure the battery pole piece 6 after winding.
For example, the heating device is set as a thermostat, and the battery pole piece 6 wound and collected in the winding device 5 is heated and insulated by the thermostat, so that the in-situ curing precursor on the surface of the battery pole piece 6 is subjected to an in-situ curing reaction, and the in-situ curing battery pole piece 6 is obtained. Preferably, the temperature in the heating device is kept in the range of 70-80 degrees in the operating state.
Preferably, as shown in fig. 1 to 4, the preparation system of the present invention further includes a transfer mechanism disposed between the unwinding device 1 and the coating device and/or between the shielding device 3 and the winding device 5 (specifically, between the low temperature drying device 4 and the winding device 5). Additionally or alternatively, the preparation system of the present invention further includes a tension adjusting mechanism and a deviation rectifying mechanism (not shown in the figure), and the tension adjusting mechanism and the deviation rectifying mechanism (not shown in the figure) are disposed between the unwinding device 1 and the coating device and/or between the protecting device 3 and the winding device 5 (specifically, between the low temperature drying device 4 and the winding device 5).
That is, the preparation system of the present invention may be provided with only the conveying mechanism, or may be provided with only the tension adjusting mechanism and the deviation correcting mechanism, or may be provided with the conveying mechanism, the tension adjusting mechanism and the deviation correcting mechanism at the same time. Specifically, as shown in fig. 1 to 4, the conveying mechanism includes a first conveying roller group 10 and a second conveying roller group 50, each of which includes two conveying rollers. The first conveying roller set 10 may be provided only between the unwinding device 1 and the coating device, or the second conveying roller set 50 may be provided only between the low-temperature drying device 4 and the winding device 5, or the first conveying roller set 10 and the second conveying roller set 50 may be provided between the unwinding device 1 and the coating device and between the low-temperature drying device 4 and the winding device 5, respectively. With such an arrangement, the first and second feed roller groups 10 and 50 can keep the battery pole piece 6 traveling downstream at a uniform speed, thereby improving the stability of the battery pole piece 6 in traveling.
In addition, the tension adjusting mechanism and the deviation correcting mechanism (not shown in the figure) may be only arranged between the unwinding device 1 and the coating device, or may be only arranged between the low-temperature drying device 4 and the winding device 5, or may be arranged between the unwinding device 1 and the coating device and between the low-temperature drying device 4 and the winding device 5. Through setting up tension guiding mechanism and mechanism of rectifying, can guarantee to keep certain roughness downstream the in-process of pay-off, simultaneously, avoid battery sheet 6 to take place the phenomenon that the material walked partially at the material process of walking, improve the security that battery sheet 6 walked the material.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.
Claims (9)
1. A system for preparing a battery pole piece, the system comprising:
the unwinding device is used for opening the battery pole piece in a winding state and sending the battery pole piece to the downstream;
the coating device is arranged at the downstream of the unreeling device and used for coating in-situ curing precursor solution on the surface of the battery pole piece;
a guard enclosing the coating device and defining a natural adsorption take-off path for the battery pole pieces; and
the winding device is arranged at the downstream of the protection device and used for winding and retracting the battery pole piece adsorbed with the in-situ curing precursor solution;
wherein the length of the natural adsorption material walking path is set to enable the in-situ solidified precursor solution coated on the battery pole piece to be sufficiently adsorbed on the battery pole piece in a natural state.
2. The system for preparing the battery pole piece according to claim 1, wherein the protection device is a protection cover with a closed chamber, one end of the protection cover is provided with a first opening for the battery pole piece to enter, the other end of the protection cover is provided with a second opening for the battery pole piece to exit, and the natural adsorption material conveying path is located between the first opening and the second opening.
3. The system of claim 2, wherein the coating device is disposed proximate to the first opening.
4. The system for preparing a battery pole piece according to claim 1, further comprising a low-temperature drying device located downstream of the protection device, wherein the low-temperature drying device is used for removing in-situ solidified precursor solution remained on the surface of the battery pole piece.
5. The system for preparing the battery pole piece according to claim 4, wherein a fan is arranged in the low-temperature drying device, and the fan exhausts air in the low-temperature drying device to the outside so that the inside of the low-temperature drying device is in a negative pressure environment.
6. The system of claim 1, wherein the coating device is a single-sided or double-sided gravure coater or a slot coater.
7. The system of claim 1, further comprising a heating device, wherein the winding device is located within the heating device.
8. The system for preparing the battery pole piece, according to claim 1, further comprising a conveying mechanism disposed between the unwinding device and the coating device and/or between the protection device and the winding device.
9. The system for preparing battery pole pieces as claimed in claim 1, further comprising a tension adjusting mechanism and a deviation rectifying mechanism, wherein the tension adjusting mechanism and the deviation rectifying mechanism are disposed between the unwinding device and the coating device and/or between the protection device and the winding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220311093.XU CN216719995U (en) | 2022-02-16 | 2022-02-16 | Preparation system of battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220311093.XU CN216719995U (en) | 2022-02-16 | 2022-02-16 | Preparation system of battery pole piece |
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| Publication Number | Publication Date |
|---|---|
| CN216719995U true CN216719995U (en) | 2022-06-10 |
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| CN202220311093.XU Active CN216719995U (en) | 2022-02-16 | 2022-02-16 | Preparation system of battery pole piece |
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| CN (1) | CN216719995U (en) |
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- 2022-02-16 CN CN202220311093.XU patent/CN216719995U/en active Active
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