CN115832167A - Battery pole piece dewatering system and battery pole piece dewatering method - Google Patents
Battery pole piece dewatering system and battery pole piece dewatering method Download PDFInfo
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- CN115832167A CN115832167A CN202111243261.2A CN202111243261A CN115832167A CN 115832167 A CN115832167 A CN 115832167A CN 202111243261 A CN202111243261 A CN 202111243261A CN 115832167 A CN115832167 A CN 115832167A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a battery pole piece dewatering system and a battery pole piece dewatering method. Battery pole piece dewatering system has arranged online sampling test subassembly including unwinding mechanism, the oven and the winding mechanism that the battery pole piece that arranges in order passed, between oven and winding mechanism, and online sampling test subassembly includes: the pole piece sampling device is used for cutting pole piece samples on line; and the position of the moisture testing device is set to be capable of receiving the pole piece sample cut by the pole piece sampling device and testing moisture in the received pole piece sample. In the battery pole piece dewatering method for the battery pole piece dewatering system, during the operation of the battery pole piece dewatering system, the online sampling test is carried out on the battery pole piece through the online sampling test assembly. The battery pole piece dewatering system and the battery pole piece dewatering method have the advantages that unqualified pole pieces are prevented from entering the subsequent process, and the failure probability is reduced.
Description
Technical Field
The invention relates to the field of pole piece manufacturing; specifically, the invention relates to a battery pole piece dewatering system and a battery pole piece dewatering method.
Background
Lithium ion battery electrodes are key components of lithium ion batteries.
In the preparation process of the lithium ion battery electrode, liquid-containing slurry consisting of the anode micro-nano particle material, the cathode micro-nano particle material, the adhesive and the solvent is uniformly coated on the surfaces of the current collector copper foil and the aluminum foil to form a wet coating containing the solvent. And then, in a battery pole piece dewatering system, hot air is used for blowing the surface of the wet coating, so that the solvent of the wet coating is heated and evaporated to remove water in the wet coating by convection heat exchange and convection heat exchange of the surface of the coating and the hot air, and the aim of drying the wet coating is fulfilled.
The battery pole piece dewatering system generally comprises an unwinding mechanism, an oven and a winding mechanism. The pole piece is unreeled and then passes through a high-temperature oven at a high speed, and the hot air takes away the moisture in the pole piece, and then the pole piece is coiled at the tail part. Generally, in the subsequent process, the water content of the pole piece is tested by manually sampling the tail of the pole piece.
If the water content of the pole piece after dehydration exceeds the standard, the battery cell performance will be deteriorated, the cycle life will be attenuated too fast, the internal resistance will be increased and other abnormalities will be caused in the later period, and finally the battery cell will be out of work. And once the pole piece with the water content exceeding the standard is manufactured into the battery cell and reaches the client, the defect is difficult to identify, and the method for reworking is unavailable, so that the pole piece can only wait for the failure of the battery cell to be scrapped, and the waste of raw materials is caused.
Therefore, the control of the water content of the pole piece after water removal is extremely important in the production of the battery cell, and unqualified pole pieces need to be avoided from entering the subsequent process, so that the failure probability is reduced.
Disclosure of Invention
Accordingly, the present invention is directed to a battery pole piece water removal system and a battery pole piece water removal method, which solve or at least alleviate one or more of the above technical problems and other problems in the prior art.
Firstly, according to an aspect of the present invention, a battery pole piece dewatering system is provided, wherein the battery pole piece dewatering system includes an unwinding mechanism, an oven through which a battery pole piece passes, and a winding mechanism, which are sequentially arranged, and an online sampling testing assembly is arranged between the oven and the winding mechanism, the online sampling testing assembly includes: the pole piece sampling device is used for cutting pole piece samples on line; and the position of the moisture testing device is set to be capable of receiving the pole piece sample cut by the pole piece sampling device and testing moisture in the received pole piece sample. Through the online sampling test of online sampling test subassembly, can acquire the water content of the different positions department of pole piece material book, these positions will be corresponding to the different layers of the inner circle and the outer lane of the pole piece material book after the rolling, consequently be favorable to monitoring the water content change of whole material book, can solve the problem that the unqualified pole piece of water content flows into next process effectively, reduce the probability of failure.
Optionally, in the battery pole piece de-watering system as described above, an error correction roller is arranged between the oven and the winding mechanism, and the online sampling test assembly is arranged upstream of the error correction roller. Under the influence of traction force, the tension of the pole piece is larger at the position close to a winding roller of the winding mechanism. The online sampling test assembly is arranged at the upstream of the rectification roller, so that the risk of tearing off the pole piece during sampling is reduced.
Optionally, in the battery pole piece water removal system as described above, the battery pole piece water removal system further includes: a control module; and the marking device is positioned between the oven and the winding mechanism, wherein the control module receives the test result of the moisture testing device in real time and identifies the unqualified battery pole piece part according to the test result, and when the unqualified battery pole piece part is identified, the control module indicates the marking device to mark the unqualified battery pole piece part. By providing a marking device to automatically mark the defective products, reliability is higher and marking quality consistency is better than manual marking.
Optionally, in the foregoing battery pole piece dewatering system, the pole piece sampling device is located on an upper side of a battery pole piece conveying path, the moisture testing device is located on a lower side of the battery pole piece conveying path, and the pole piece sampling device and the moisture testing device are located so that the pole piece sample cut by the pole piece sampling device can fall into the moisture testing device through gravity and/or a slide way. Can guarantee reliably through so setting up that pole piece sample gets into moisture content testing arrangement and accomplishes the water content test.
Optionally, in the foregoing battery pole piece water removal system, the battery pole piece water removal system further has an openable sealing cover, the winding mechanism and the online sampling and testing assembly are located in the sealing cover, and the sealing cover is in sealed communication with the oven at the discharge port end of the oven. The sealed intercommunication between this sealed cowling and the oven can provide the environment of low humidity for pole piece sample test and rolling process effectively, prevents that the humidity of external environment from getting into and producing adverse effect to this process between sealed cowling and oven, avoids the pole piece to absorb moisture fast leaving the cooling process of oven, leads to pole piece water content to exceed standard.
Optionally, in the battery pole piece water removal system as described above, a drying agent is placed inside the sealing cover, or an air inlet for blowing dry gas toward the inside of the sealing cover is provided at the sealing cover. Both the desiccant and the drying gas may contribute to further improving the low temperature environment within the sealed enclosure.
Optionally, in the battery pole piece water removal system as described above, the sealing cap has a transparent viewing window. The provision of this observation window makes the staff can observe the inside sample test link of sealed cowling when patrolling and examining.
Optionally, in the battery pole piece dewatering system as described above, the pole piece sampling device is a laser cutter, a mechanical cutter, or an ultrasonic cutter.
Optionally, in the battery pole piece water removal system as described above, the sampling location of the pole piece sampling device is located at the edge of the coating area of the battery pole piece.
Optionally, in the battery pole piece dewatering system as described above, the pole piece sampling device cuts a pole piece sample on the battery pole piece at a fixed sampling frequency, or the pole piece sampling device cuts a pole piece sample on the battery pole piece at a variable sampling frequency according to the stability of the battery pole piece dewatering system.
Secondly, according to another aspect of the present invention, there is provided a battery pole piece water removal method for the battery pole piece water removal system as described in any one of the preceding aspects, wherein during the operation of the battery pole piece water removal system, the battery pole piece is subjected to an online sampling test by the online sampling test assembly.
Optionally, in the foregoing method for removing water from a battery pole piece, the method for removing water from a battery pole piece further includes the following steps: and when the water content of the pole piece sample is detected to exceed the standard, the unqualified product is marked manually by a worker or automatically by a marking device.
Optionally, in the foregoing method for removing water from a battery pole piece, the battery pole piece water removal system further has a sealing cover that can be opened, the winding mechanism and the online sampling and testing assembly are located in the sealing cover, and the sealing cover is in sealed communication with the oven at a discharge port end of the oven, wherein the sealing cover is kept closed all the time during the water removal of the battery pole piece. In the process of dewatering the battery pole piece, the sealing cover is always closed, so that the low-temperature environment in the sealing cover can be effectively maintained.
Optionally, in the battery pole piece water removal method as described above, a drying agent is placed in the sealing cover, or a drying gas is continuously blown into the sealing cover during the closing of the sealing cover. Both the desiccant and the drying gas may contribute to further improving the low temperature environment within the sealed enclosure.
The principles, features, characteristics, advantages and the like of various aspects according to the present invention will be clearly understood from the following detailed description taken in conjunction with the accompanying drawings. The scheme of the invention can overcome or at least alleviate the defects or shortcomings in the existing battery pole piece dewatering system or battery pole piece dewatering method, and particularly can favorably prevent unqualified battery pole pieces from entering the subsequent procedures of the battery pole pieces and batteries, thereby reducing the failure probability.
Drawings
Other features of the present invention and advantages thereof will become more apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings; it is to be understood, however, that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the figure, the position of the upper end of the main shaft,
figure 1 schematically illustrates a battery pole piece water removal system according to one embodiment of the present invention.
Reference numerals:
1-an unwinding mechanism; 2-baking oven; 3, a winding mechanism; 4-a battery pole piece; 5-a first rectification roller; 6-a second deviation rectifying roller; 7-a third deviation rectifying roller; 8-an online sampling test component; 81-pole piece sampling device; 82-moisture testing means; 9-sealing the cover; 10-vent.
Detailed Description
Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings. The components and structures in the drawings are merely schematic and are not necessarily drawn to scale. It should be understood that the relative arrangement of parts and steps, numerical expressions and numerical values, etc., set forth in these embodiments are illustrative only and are not intended to limit the scope of the present invention unless specifically stated otherwise.
The terms "first" and "second" herein are used for descriptive purposes only and are not intended to represent their sequential or relative importance.
Furthermore, to any single feature described or implicit in an embodiment or shown or implicit in the drawings or any single feature shown or implicit in the drawings, the invention still allows any combination or addition or deletion between these features (or their equivalents) to continue without any technical barriers, so that further embodiments according to the invention should be considered within the scope of this description. In addition, for the sake of brevity, general matters which have been well known to those skilled in the art, such as the basic operation principles of the coating process, the baking process, the rolling process, etc. which are commonly used in the field of lithium battery manufacturing, are not repeated herein.
Figure 1 schematically illustrates a battery pole piece water removal system according to one embodiment of the present invention. The battery pole piece dewatering system can be suitable for a baking process of battery pole piece production, and is between a coating process and a rolling process of battery pole piece production. In the coating process, a slurry coating is applied to the foil to form the pole piece. In the baking process, the pole pieces are dehumidified in an oven to remove water in the coating. In the rolling procedure, the bonding strength of the coating and the foil is enhanced, and the porosity of the pole piece is reduced.
As can be seen from the figure, the battery pole piece dewatering system according to the embodiment of the present invention may include an unwinding mechanism 1, an oven 2 through which a battery pole piece 4 passes, and a winding mechanism 3, which are sequentially arranged. The battery pole piece dewatering system can be entirely positioned in one drying chamber, or at least the oven 2 and the rolling mechanism 3 are positioned in one drying chamber, so that the low-humidity environment of the battery pole piece dewatering system can be locally controlled.
The unwinding mechanism 1 is arranged upstream of the oven 2. The pole piece material roll transferred from the previous coating process is placed at the unwinding roller of the unwinding mechanism 1. The battery pole piece 4 released from the pole piece roll at the unwinding mechanism 1 is pulled into the oven 2. In an alternative embodiment, a deviation correction roller may be arranged between the unwinding mechanism 1 and the oven 2 to ensure the directional feeding of the pole pieces. Further, in different embodiments, different numbers and different arrangements of the rectification rollers can be adopted according to specific situations. Only one first deviation rectification roller 5 is shown here by way of example in the figure.
The oven 2 is used for drying the battery pole pieces 4 conveyed therethrough. The heating tunnel within oven 2 may be provided with a conveyor carrying battery grade pieces, such as, but not limited to, guide rollers or the like. The oven 2 may also be provided with a pumping and exhausting device for pumping out moisture dried from the battery sheet 4 from the oven 2. In different embodiments, the interior of the oven 2 may have different specific structures and arrangements according to specific situations, and will not be described herein.
The winding mechanism 3 is arranged at the downstream of the oven 2 and used for winding the battery pole piece 4 dried by the oven 2. After being dried by the oven 2, the battery pole piece 4 is drawn to the winding mechanism 3 and wound on a winding roller of the winding mechanism 3. The wound pole piece coil is ready for subsequent rolling processes. In an alternative embodiment, a deviation correction roller may be arranged between the oven 2 and the winding mechanism 3 to ensure the directional transport of the pole pieces. Further, in different embodiments, different numbers and different arrangements of the rectification rollers can be adopted according to specific situations. In the figure, only two deflection rollers, namely a second deflection roller 6 and a third deflection roller 7, are shown here by way of example.
In the embodiment shown in the figures, an in-line sampling and testing assembly 8 is disposed between the oven 2 and the take-up mechanism 3. For example, both may be mounted on a frame or housing of a battery pole piece dewatering system.
By arranging the online sampling test assembly 8 between the oven 2 and the winding mechanism 3, during the operation of the battery pole piece dewatering system, the battery pole piece 4 dried by the oven 2 is sampled and tested whether the water content of the pole piece sample exceeds the standard or not before being wound. And allowing the battery pole piece dewatering system to normally carry out the baking procedures of unreeling, baking and reeling under the condition that the water content does not exceed the standard. And once the water content of the pole piece exceeds the standard in the test, marking the pole piece, and cutting or reworking and re-baking the pole piece before the next rolling procedure. The marking can be done manually or automatically by the device.
Here, by sampling and then testing the battery pole pieces 4 on-line, the water content of the pole pieces at different locations in the roll of pole pieces can be tested and can be substantially representative of the water content of the entire roll. Particularly, the water content of the outer layer of the pole piece material roll can be measured, the water content of the inner layer of the pole piece material roll can also be measured, and the water content change of the whole pole piece material roll is favorably monitored. In different embodiments, the frequency of sampling tests can be controlled as required to achieve different test accuracies. The higher the frequency of sampling test is, the higher the test precision can be obtained, and the more favorable the probability that pole pieces with unqualified water content enter the subsequent process is reduced. Particularly, under the condition that the water contents of different positions of the baked pole piece are still inconsistent due to inconsistent water contents of incoming materials of the pole piece, failure of temperature control in the baking process and the like, the online sampling test shows more remarkable technical effect.
Compared with the condition that the water content at the tail part of the material roll is only tested after the drying process is finished, the quality of the material roll after the baking process is improved to a great extent. Because the water content measured at the tail of the roll does not truly represent the water content of the inner layer of the roll, waste products may be generated. In addition, the tail of the roll may absorb water again after leaving the oven and being wound up, so the water content measured only at this point may not be accurate and representative of the water content of the pole pieces elsewhere throughout the roll.
In addition, the battery pole piece 4 is sampled and then tested on line, so that the normal production efficiency of the pole piece is not influenced, a more reliable test result is realized and a very beneficial technical effect can be realized compared with the direct test of the pole piece in transmission.
In the illustrated embodiment, the in-line sampling and testing assembly 8 is arranged after the oven 2 and between the rectification roller and the take-up mechanism 3, i.e. downstream of the rectification roller, upstream of the take-up mechanism 3. In this arrangement, the water content of the pole piece sample tested by the in-line sampling and testing assembly 8 is closer to the water content of the pole piece at each layer and location in the roll.
In alternative embodiments, the in-line sample testing assembly 8 can also be disposed between different rectification rollers, such as the second rectification roller 6 and the third rectification roller 7, or between rectification rollers and the oven 2. Through arranging online sampling test component 8 away from the wind-up roll of winding mechanism 3 like this, be favorable to preventing the interference that produces between the pole piece that advances at a high speed and the pole piece sample from tearing the pole piece apart. Because the pole piece is drawn and advanced, the tension is greater at the position close to the winding roller, and once the interference with the sampling process occurs, the action force can break the pole piece.
As can be seen in FIG. 1, in this embodiment of the present invention, the in-line sampling test assembly 8 may include a pole piece sampling device 81 and a moisture testing device 82. This pole piece sampling device 81 can be used to cut out the pole piece sample on line. Such automatic sampling significantly improves sampling efficiency relative to manual sampling. The moisture testing device 82 can be used to test moisture in the received pole piece sample and is positioned to receive the pole piece sample cut by the pole piece sampling device 81.
In the example shown in the figure, the pole piece sampling device 81 is located at the upper side of the battery pole piece conveying path, the moisture testing device 82 is located at the lower side of the battery pole piece conveying path, and meanwhile, the pole piece sampling device 81 and the moisture testing device 82 are located so that a pole piece sample cut by the pole piece sampling device 81 can fall into the moisture testing device 82 through gravity and/or a slide way (not shown).
For example, the pole piece sampling device 81 may be disposed proximate to the battery pole piece 4. The moisture testing device 82 may be located near the location of the battery pole piece 4 cut by the pole piece sampling device 81, for example, below the cut location of the battery pole piece 4. Meanwhile, in view of the high-speed travel of the battery pole piece 4, it may be positioned slightly forward below the cut position of the battery pole piece 4. In addition, if the pole piece sample falls a long distance, or considering the high-speed travel of the battery pole piece 4, a slide rail may be provided for guiding the cut pole piece sample falling down so that it can reliably fall into the moisture testing device 82, be received by the moisture testing device 82, and be tested therein.
In different embodiments, the pole piece sampling device 81 can have different implementations. For example, the pole piece sampling device 81 may include, but is not limited to, a laser cutter, a mechanical cutter, or an ultrasonic cutter, as the case may be. The principle of laser cutting includes melting and evaporating a workpiece using energy released when a laser beam is irradiated onto the surface of the workpiece to achieve the purpose of cutting. The principle of mechanical cutting includes directly cutting a workpiece using a cutter (e.g., without limitation, a punch cutter, etc.). The principle of ultrasonic cutting includes cutting a workpiece by vibration generated by an ultrasonic vibrator. Given the above-described upper cutting principle, a suitable cutting tool can be selected in different embodiments, as required. If necessary, in order to prevent the pole piece from being torn apart during sampling, the pole piece sampling device can move corresponding to the pole piece during sampling.
In addition to the laser cutter, the mechanical cutter and the ultrasonic cutter, other suitable implementations of the pole piece sampling device 81 may also be desirable, and are not described in detail herein.
The pole piece sample cut by the pole piece sampling device 81 can be in the shape of a circular disc. In alternative embodiments, the cut pole piece sample can be square, triangular, or any other shape. The area of the pole piece sample can be conveniently calculated by selecting the regular shape, so that the weight of the pole piece sample can be calculated more easily, and whether the moisture content of the pole piece sample reaches the standard or not is judged based on the weight.
In one embodiment of a battery pole piece water removal system, the sampling location of the pole piece sampling device 81 can be located at the edge of the coating region of the battery pole piece 4. As for this sampling position, a baking position in the oven 2 can be considered. In the baking process in the oven 2, the baking temperature at the middle position of the battery pole piece 4 is the highest, and the baking temperatures at the two edge positions are relatively lower. Therefore, the moisture at the two edge positions of the battery pole piece is also relatively high. Therefore, with the two outer edge regions of the battery pole piece as a standard, if these edge regions can meet the water content requirement, the water content requirement can also be met at the middle position. It should be noted that the present invention does not exclude the implementation of the sampling location in the middle region of the coating region of the battery pole piece.
In one embodiment, the sampling frequency of the pole piece sampling device 81 can be a fixed sampling frequency. The fixed sampling step can be set according to specific needs. Denser sampling frequency will result in more pole piece scrap rate; a sparser sampling frequency may lead to a risk of missing measurements. In other embodiments, non-fixed sampling frequencies are possible. For example, a higher sampling frequency may be used when the battery pole piece water removal system can be expected to operate unstably, and a lower sampling frequency may be used when the battery pole piece water removal system can be expected to operate more stably.
In the illustrated embodiment, the moisture testing device 82 may be a measuring instrument that measures the water content using the karl fischer method. After the moisture testing device 82 receives the pole piece sample, the pole piece sample enters a container of the moisture testing device 82. At this time, the container is sealed, and then the pole piece sample is heated at a high temperature to release moisture from the pole piece sample, and the moisture vapor is carried by the gas flow into a beaker containing a flux (e.g., karl fischer reagent) having an electrode inserted therein for inducing a reaction of an electrochemical potential. When the moisture released by the pole piece sample reacts with the flux in the flux, the moisture testing device 82 displays the water content based on the corresponding electrochemical potential difference. It should be noted here that moisture test devices of different principles are also suitable; and will not be described in detail herein.
The battery pole piece de-watering system may further include a control module (not shown) and a marking device located between the oven 2 and the winding mechanism 3. The control module can receive the test result of the moisture testing device 8 in real time and identify the unqualified battery pole piece part according to the test result. When the unqualified battery pole piece part is identified, the control module can instruct the marking device to mark the unqualified battery pole piece part. Specific marking modes can include, but are not limited to, attaching a colored label, such as a yellow label, on the part of the unqualified battery pole piece. Therefore, the unqualified battery pole piece parts can be identified in the subsequent rolling process, and are fed back to a craftsman, and the unqualified products are individually selected out, reworked and baked again.
As can be further seen from fig. 1, a sealing cover 9 is further provided in the battery pole piece dewatering system of the illustrated embodiment, and the second rectification roller 6, the third rectification roller 7, the online sampling test assembly 8, the winding mechanism 3 and the like after the oven 2 are sealed in the sealing cover 9. Without the provision of the rectification roller, the winding mechanism 3, the in-line sampling test assembly 8, and the like may be disposed within the seal cover 9. A desiccant may be provided within the sealed enclosure 9. This sealing hood 9 makes it possible to reduce by orders of magnitude the dew point value of the atmosphere of the pole leaving the oven 2, compared with the drying chamber mentioned above. The closure 9 is openable to facilitate removal of the completed roll of pole pieces from the winding mechanism 3 for further rolling.
The sealing cover 9 is in sealed communication with the oven 2 at the discharge opening end of the oven 2. For example, as shown in the figure, in addition to the position of the discharge opening through which the battery pole piece 4 passes, an additional vent 10 may be provided at the discharge opening end so that the sealing cover 9 communicates with the oven 2. The number, area, cross-sectional shape, etc. of the vents 10 may not be limited according to various embodiments.
In addition, the sealing connection between the sealing cover 9 and the oven 2 can effectively provide a low-humidity environment for the pole piece sampling test and winding process, prevent the humidity of the external environment from entering between the sealing cover 9 and the oven 2 and generating adverse effect on the process, and avoid the fast moisture absorption of the pole piece in the cooling process of leaving the oven 2, which leads to the rise of the water content of the pole piece again and exceeds the standard and reduces the baking efficiency. After the pole pieces are wound into the pole piece material roll, the pole pieces of the inner ring are not in direct contact with air, and the water absorption possibility of the pole pieces can be obviously reduced.
In order to further improve the low humidity environment inside the sealed enclosure 9, which is beneficial for satisfying the cooling of the pole pieces and preventing the risk of moisture absorption of the pole pieces, in a further embodiment, an air inlet for blowing dry air towards the inside of the sealed enclosure 9 may be provided at the sealed enclosure 9. The position, number, area, cross-sectional shape, air inlet direction, air inlet strength and the like of the air inlets can be set as required, and are not described in detail here. The drying gas herein may include, but is not limited to, dry air, nitrogen, and the like.
The sealing boot 9 may be made of various materials such as, but not limited to, plastic, metal, and the like. For inspection convenience, so that the working personnel can observe the operation condition inside the sealing cover 9, the sealing cover 9 can be made of transparent materials, such as transparent plastics, glass and the like. Or, in the case of using the opaque material to manufacture the sealing cover 9, a transparent observation window may be provided for the sealing cover 9 to facilitate the inspection requirement.
In summary, as can be understood from the above description, with reference to fig. 1, the various embodiments of the battery pole piece water removal system advantageously significantly improve the water removal performance of the battery pole piece water removal system by including, for example, but not limited to, the online sampling test assembly 8, the sealing cover 9, and the like, prevent the unqualified battery pole piece from entering the subsequent process, and provide the possibility for the high quality and high efficiency of the battery pole piece and the subsequent process of the battery.
In addition, the invention also provides a battery pole piece water removing method using the battery pole piece water removing system in any one of the embodiments. In an embodiment of the method, the battery pole piece is subjected to online sampling test through the online sampling test assembly.
Specifically, according to the method, after the battery pole piece dewatering system is started, the online sampling test assembly starts sampling test.
Specifically, the pole piece sampling device 81 cuts a pole piece sample on the pole piece passing through the oven 2, and after the pole piece sample falls into the moisture testing device 82, the moisture testing device 82 performs moisture testing on the pole piece sample to detect the water content in the pole piece sample.
According to a specific embodiment, the defective marking can be performed manually by a worker or by a marking device when the water content is detected to be over-standard. The process may be a worker or automated equipment applying color markings to the rejects. The indicia may be a painted or affixed sticker or marking.
After the sampling test of the whole roll of pole pieces is completed, the pole piece material roll after dewatering is transferred to leave the winding mechanism 3. In the subsequent rolling process, defective products can be picked out according to the marks on the pole piece material roll, reworked and sent back to be baked again.
In the case of a battery pole piece de-watering system with a sealing can 9, in an alternative embodiment of the battery pole piece de-watering method, it is also necessary to open the sealing can 9 before the roll of pole pieces is transferred from the winding mechanism 3. And, in the dewatering process of battery sheet, sealed cowling 9 need remain closed all the time, and sealed cowling 9 that provides the air inlet can be constantly to blowing dry gas to sealed cowling 9 inside.
By combining the above description and the battery pole piece water removal system shown in fig. 1, it can be understood that the embodiments of the battery pole piece water removal method can advantageously and significantly improve the water removal performance of the battery pole piece water removal system, prevent unqualified battery pole pieces from entering the subsequent processes, and provide possibility for the high quality and high efficiency of the battery pole pieces and the subsequent processes of the battery and products.
Some embodiments of the battery pole piece water removal system and the battery pole piece water removal method according to the invention are exemplarily described above. Those skilled in the art will be able to make additions, deletions, or modifications to the embodiments and features therein without departing from the scope and spirit of the described embodiments. All equivalents are intended to be within the scope of this invention and are to be considered within the scope of this invention.
Claims (14)
1. The utility model provides a battery pole piece water removal system, its characterized in that, battery pole piece water removal system is including unwinding mechanism (1), oven (2) and winding mechanism (3) that supply battery pole piece (4) to pass that arrange in order to, oven (2) with arranged online sampling test subassembly (8) between winding mechanism (3), online sampling test subassembly (8) include:
a pole piece sampling device (81) for cutting pole piece samples on line; and
the moisture testing device (82) is arranged at a position capable of receiving the pole piece sample cut by the pole piece sampling device (81) and testing moisture in the received pole piece sample.
2. The battery pole piece water removal system of claim 1, wherein a deflection roller is arranged between the oven (2) and the take-up mechanism (3), the online sampling test assembly being arranged upstream of the deflection roller.
3. The battery pole piece water removal system of claim 1 or 2, wherein the battery pole piece water removal system further comprises:
a control module; and
a marking device positioned between the oven (2) and the winding mechanism (3),
the control module receives the test result of the moisture testing device (82) in real time, identifies the unqualified battery pole piece part according to the test result, and instructs the marking device to mark the unqualified battery pole piece part when the unqualified battery pole piece part is identified.
4. The battery pole piece dewatering system according to any one of claims 1 to 3, wherein the pole piece sampling device (81) is located on the upper side of the battery pole piece conveying path, the moisture testing device (82) is located on the lower side of the battery pole piece conveying path, and the pole piece sampling device (81) and the moisture testing device (82) are located such that the pole piece sample cut by the pole piece sampling device (81) can fall into the moisture testing device (82) by gravity and/or a slide way.
5. The battery pole piece water removal system of any one of claims 1 to 4, wherein the battery pole piece water removal system is configured as an openable sealed enclosure (9), the take-up mechanism (3), the online sampling test assembly (8) are all located within the sealed enclosure (9), and the sealed enclosure (9) is in sealed communication with the oven (2) at an outlet end of the oven (2).
6. The battery pole piece de-watering system according to any one of claims 1 to 5, wherein a desiccant is placed inside the sealing hood (9), or wherein an air inlet for blowing dry gas towards the inside of the sealing hood (9) is provided at the sealing hood (9).
7. The battery pole piece water removal system of any one of claims 1 to 6, wherein the sealing cap (9) has a transparent viewing window.
8. The battery pole piece de-watering system according to any one of claims 1 to 7, wherein the pole piece sampling device (81) is a laser cutter, a mechanical cutter or an ultrasonic cutter.
9. The battery pole piece dewatering system of any one of claims 1 to 8, wherein the sampling location of the pole piece sampling device (81) is located at the edge of the coating zone of the battery pole piece (4).
10. The battery pole piece de-watering system according to any one of claims 1 to 9 wherein the pole piece sampling device (81) cuts pole piece samples on the battery pole piece (4) at a fixed sampling frequency or the pole piece sampling device (81) cuts pole piece samples on the battery pole piece (4) at a varying sampling frequency depending on the stability of the battery pole piece de-watering system.
11. A battery pole piece de-watering method for a battery pole piece de-watering system according to any one of claims 1 to 10, wherein the battery pole piece (4) is subjected to an online sampling test by the online sampling test assembly (8) during operation of the battery pole piece de-watering system.
12. The battery pole piece water removal method of claim 11, wherein the battery pole piece water removal method further comprises the steps of:
and when the water content of the pole piece sample is detected to exceed the standard, the unqualified product is marked manually by a worker or automatically by a marking device.
13. The battery pole piece water removal method of claim 11 or 12, wherein the battery pole piece water removal system is configured as an openable sealing cover (9), the winding mechanism (3), the online sampling test assembly (8) are all located in the sealing cover (9), and the sealing cover (9) is in sealing communication with the oven (2) at an outlet end of the oven (2),
wherein, in the process of dewatering the battery pole piece (4), the sealing cover (9) is always kept closed.
14. The battery pole piece de-watering method according to any one of claims 11 to 13, wherein a desiccant is placed in the sealing hood (9), or a dry gas is continuously blown inside the sealing hood (9) during the closing of the sealing hood (9).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243261.2A CN115832167A (en) | 2021-10-25 | 2021-10-25 | Battery pole piece dewatering system and battery pole piece dewatering method |
| PCT/CN2022/124688 WO2023071784A1 (en) | 2021-10-25 | 2022-10-11 | Battery sheet water removal system and battery sheet water removal method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111243261.2A CN115832167A (en) | 2021-10-25 | 2021-10-25 | Battery pole piece dewatering system and battery pole piece dewatering method |
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| CN115832167A true CN115832167A (en) | 2023-03-21 |
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| CN202111243261.2A Pending CN115832167A (en) | 2021-10-25 | 2021-10-25 | Battery pole piece dewatering system and battery pole piece dewatering method |
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| WO (1) | WO2023071784A1 (en) |
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| CN117810374B (en) * | 2024-03-01 | 2024-07-05 | 江苏时代新能源科技有限公司 | Pole piece production system and control method thereof |
| CN118463556B (en) * | 2024-07-09 | 2024-09-17 | 东莞市鹏锦机械科技有限公司 | Laser drying device for battery pole piece |
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| CN105576186A (en) * | 2015-12-17 | 2016-05-11 | 中天储能科技有限公司 | Novel baking method and control system |
| CN111486664A (en) * | 2020-04-23 | 2020-08-04 | 华鼎国联四川动力电池有限公司 | Baking curve construction method and baking method of lithium ion battery pole piece |
| WO2021031287A1 (en) * | 2019-08-16 | 2021-02-25 | 宁德时代新能源科技股份有限公司 | Preparation method for laminated battery cell, laminated battery cell, and lamination device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201844934U (en) * | 2010-07-30 | 2011-05-25 | 凯迈（江苏）机电有限公司 | Pole piece coating production line and on-line sampling system thereof |
| CN108106880A (en) * | 2017-12-13 | 2018-06-01 | 中航锂电（江苏）有限公司 | The sampling and testing method and sampler of a kind of lithium battery moisture measurement |
| CN209513305U (en) * | 2018-11-30 | 2019-10-18 | 合肥国轩高科动力能源有限公司 | Lithium ion battery pole piece coating surface density rapid actual measurement device |
| CN110779755A (en) * | 2019-11-29 | 2020-02-11 | 湖南新敏雅新能源科技有限公司 | Online sampling device of battery pole piece |
-
2021
- 2021-10-25 CN CN202111243261.2A patent/CN115832167A/en active Pending
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- 2022-10-11 WO PCT/CN2022/124688 patent/WO2023071784A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576186A (en) * | 2015-12-17 | 2016-05-11 | 中天储能科技有限公司 | Novel baking method and control system |
| WO2021031287A1 (en) * | 2019-08-16 | 2021-02-25 | 宁德时代新能源科技股份有限公司 | Preparation method for laminated battery cell, laminated battery cell, and lamination device and system |
| CN111486664A (en) * | 2020-04-23 | 2020-08-04 | 华鼎国联四川动力电池有限公司 | Baking curve construction method and baking method of lithium ion battery pole piece |
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| WO2023071784A1 (en) | 2023-05-04 |
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