WO2023071784A1 - Battery sheet water removal system and battery sheet water removal method - Google Patents

Battery sheet water removal system and battery sheet water removal method Download PDF

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Publication number
WO2023071784A1
WO2023071784A1 PCT/CN2022/124688 CN2022124688W WO2023071784A1 WO 2023071784 A1 WO2023071784 A1 WO 2023071784A1 CN 2022124688 W CN2022124688 W CN 2022124688W WO 2023071784 A1 WO2023071784 A1 WO 2023071784A1
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WIPO (PCT)
Prior art keywords
pole piece
battery pole
water removal
removal system
sampling
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PCT/CN2022/124688
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French (fr)
Chinese (zh)
Inventor
赵炎
黄彩虾
肖仲星
卓淑敏
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宁德时代新能源科技股份有限公司
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Publication of WO2023071784A1 publication Critical patent/WO2023071784A1/en

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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

Definitions

  • the invention relates to the field of pole piece manufacturing; in particular, the invention relates to a battery pole piece water removal system and a battery pole piece water removal method.
  • the electrodes of lithium-ion batteries are the key components of lithium-ion batteries.
  • the liquid slurry composed of positive and negative electrode micro-nano particle materials, binders, and solvents is evenly coated on the surface of the current collector copper foil and aluminum foil to form a layer of solvent-containing slurry. wet coat.
  • hot air is used to blow the surface of the wet coating, so that the coating surface and the hot air convective heat exchange, and the convective heat exchange makes the solvent of the wet coating evaporate and remove the moisture in the wet coating to make the wet coating dry. The purpose of the coating becoming dry.
  • the battery pole piece water removal system usually includes an unwinding mechanism, an oven and a winding mechanism. After the pole piece is unrolled, it passes through a high-temperature oven at high speed, and the hot air takes away the moisture in the pole piece, and then winds up at the end. Generally speaking, in the follow-up process, artificial sampling will be carried out at the end of the pole piece to test the water content of the pole piece.
  • the pole piece with excessive water content is made into a cell and arrives at the client, it is difficult to identify the defect, and there is no way to rework it. It can only be scrapped after the cell fails, resulting in a waste of raw materials.
  • controlling the water content of the pole piece after water removal is extremely important in the production of batteries, and it is necessary to prevent unqualified pole pieces from entering the subsequent process and reduce the probability of failure.
  • the present invention provides a battery pole piece water removal system and a battery pole piece water removal method, thereby solving or at least alleviating one or more of the above-mentioned technical problems and other problems existing in the prior art.
  • a battery pole piece water removal system wherein the battery pole piece water removal system includes an unwinding mechanism arranged in sequence, an oven for the battery pole piece to pass through, and a winding mechanism, and an online sampling test assembly is arranged between the oven and the winding mechanism, the online sampling test assembly includes: a pole piece sampling device for cutting pole piece samples online; and a moisture testing device, the The position of the moisture testing device is set to be able to receive the pole piece sample cut by the pole piece sampling device and test the moisture in the received pole piece sample.
  • the water content at different positions of the pole piece material roll can be obtained, and these positions will correspond to different layers of the inner ring and the outer ring of the pole piece material roll after winding, so It is beneficial to monitor the change of the water content of the entire material roll, and can effectively solve the problem that the pole pieces with unqualified water content flow into the next process and reduce the failure probability.
  • a deflection correction roller is arranged between the oven and the winding mechanism, and the online sampling test assembly is arranged upstream of the deflection correction roller. Affected by the traction force, the tension of the pole piece is higher near the winding roller of the winding mechanism. Arranging the online sampling test assembly upstream of the rectifying roller is beneficial to reduce the risk of tearing off the pole piece during sampling.
  • the battery pole piece water removal system further includes: a control module; and a marking device located 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 position according to the test result, and when the unqualified battery pole piece position is identified, the control module instructs the The marking device marks the unqualified battery pole pieces.
  • the control module receives the test result of the moisture testing device in real time and identifies the unqualified battery pole piece position according to the test result, and when the unqualified battery pole piece position is identified, the control module instructs the The marking device marks the unqualified battery pole pieces.
  • the pole piece sampling device is located on the upper side of the battery pole piece conveying path
  • the moisture testing device is located on the lower side of the battery pole piece conveying path
  • the positions of the pole piece sampling device and the moisture testing device are set 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 slideway.
  • Such setting can reliably ensure that the pole piece sample enters the moisture testing device to complete the water content test.
  • the battery pole piece water removal system further has an openable sealing cover, and the winding mechanism and the online sampling test assembly are located in the and the sealing cover is in airtight communication with the oven at the outlet end of the oven.
  • the sealed communication between the sealed cover and the oven can effectively provide a low-humidity environment for the pole piece sampling test and winding process, preventing the moisture of the external environment from entering between the sealed cover and the oven to adversely affect the process, avoiding
  • the pole piece absorbs moisture quickly during the cooling process leaving the oven, resulting in excessive water content in the pole piece.
  • a desiccant is placed in the sealed cover, or a device for blowing dry gas toward the inside of the sealed cover is provided at the sealed cover. air intake. Both desiccant and drying gas can help to further improve the low temperature environment within the enclosure.
  • the sealing cover has a transparent observation window.
  • the provision of the observation window enables the staff to observe the sampling and testing process inside the sealing cover during inspection.
  • the pole piece sampling device is a laser cutter, a mechanical cutter or an ultrasonic cutter.
  • the sampling position of the pole piece sampling device is located at the edge of the coating area of the battery pole piece.
  • the pole piece sampling device cuts pole piece samples on the battery pole piece at a fixed sampling frequency, or, the pole piece sampling device Stability of the Pole Piece Dewatering System Pole piece samples were cut on the battery pole pieces at varying sampling frequencies.
  • 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 the battery pole piece dewatering method During the operation of the system, an online sampling test is performed on the battery pole piece through the online sampling test component.
  • the battery pole piece water removal method further includes the following steps: when it is detected that the water content of the pole piece sample exceeds the standard, manually or by marking The equipment automatically marks the unqualified products.
  • the battery pole piece water removal system further has a sealed cover that can be opened, and the winding mechanism and the online sampling test assembly are located in the and the sealing cover is in airtight communication with the oven at the outlet end of the oven, wherein the sealing cover is always kept closed during the process of dewatering the battery pole piece.
  • the sealing cover is always kept closed, which can effectively maintain the low temperature environment in the sealing cover.
  • a desiccant is placed in the sealing cover, or a drying gas is continuously blown into the sealing cover during closing of the sealing cover. Both desiccant and drying gas can help to further improve the low temperature environment within the enclosure.
  • Adopting the scheme of the present invention can overcome or at least alleviate the defects or deficiencies existing in the existing battery pole piece water removal system or battery pole piece water removal method, and can especially advantageously prevent unqualified battery pole pieces from entering into the battery pole piece and the battery pole pieces. Subsequent processes to reduce the probability of failure.
  • Fig. 1 schematically shows a battery pole piece water removal system according to an embodiment of the present invention.
  • 1-unwinding mechanism 2-oven; 3-rewinding mechanism; 4-battery pole piece; 5-first deviation correction roller; 6-second deviation correction roller; 7-third deviation correction roller; 8-on-line sampling test components; 81-electrode sampling device; 82-moisture testing device; 9-sealed cover; 10-air vent.
  • Fig. 1 schematically shows a battery pole piece water removal system according to an embodiment of the present invention.
  • the battery pole piece water removal system can be applied to the baking process of the battery pole piece production, between the coating process and the rolling process of the battery pole piece production.
  • a coating of slurry is applied to the foil to form pole pieces.
  • the electrode piece is dehumidified in the oven to remove the moisture in the coating.
  • the bonding strength between the coating and the foil is enhanced, and the porosity of the pole piece is reduced at the same time.
  • the battery pole piece water removal system of this embodiment of the present invention may include an unwinding mechanism 1 , an oven 2 through which the battery pole piece 4 passes, and a winding mechanism 3 arranged in sequence.
  • the battery pole piece water removal system can be entirely located in a drying room, or at least the oven 2 and the winding mechanism 3 are located in a drying room, so that the low-humidity environment can be locally controlled.
  • the unwinding mechanism 1 is arranged upstream of the oven 2 .
  • the pole sheet 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 material roll at the unwinding mechanism 1 is pulled into the oven 2 .
  • a deviation correcting roller may be arranged between the unwinding mechanism 1 and the oven 2 to ensure the directional conveyance of the pole piece. Further, in different embodiments, different numbers and different arrangements of deviation correcting rollers may be used according to specific conditions. Only one first deflection roller 5 is shown here by way of example in the figure.
  • the oven 2 is used to dry the battery pole pieces 4 conveyed therethrough.
  • the heating channel in the oven 2 may be provided with a conveying device for carrying battery-grade sheets, such as but not limited to guide rollers.
  • the oven 2 may also be provided with an exhaust device for extracting moisture from the oven 2 baked out from the battery pole piece 4 .
  • the interior of the oven 2 may have different specific structures and arrangements according to specific conditions, which will not be repeated here.
  • the winding mechanism 3 is arranged downstream of the oven 2 and is used for winding up the battery pole piece 4 dried by the oven 2 . After being dried in the oven 2 , the battery pole piece 4 is pulled to the winding mechanism 3 and wound up on the winding roller of the winding mechanism 3 .
  • the coiled pole piece stock can be prepared for the subsequent rolling process.
  • a deviation correcting roller may be arranged between the oven 2 and the winding mechanism 3 to ensure the directional conveyance of the pole piece. Further, in different embodiments, different numbers and different arrangements of deviation correcting rollers may be used according to specific conditions. Only two guide rollers are shown here by way of example in the figure, namely the second guide roller 6 and the third guide roller 7 .
  • an online sampling test assembly 8 is arranged between the oven 2 and the winding mechanism 3 .
  • the two can be fixed on the rack or base of the battery pole piece water removal system.
  • the battery pole pieces 4 dried in the oven 2 are sampled and tested before being rolled up. Whether the water content of the tablet sample exceeds the standard. Under the condition that the water content does not exceed the standard, the battery pole piece water removal system is allowed to perform the baking process of unwinding, baking, and winding normally. Once it is tested that the water content of the pole piece exceeds the standard, mark it on the pole piece, and cut off or rework and re-baked before the next rolling process. At this time, the marking work can be done manually or automatically by the equipment.
  • the water content at different positions of the pole piece in the pole piece roll can be tested, which can basically represent the water content of the entire roll. Specifically, it can not only measure the water content of the outer layer of the material roll, but also measure the water content of the inner layer of the material roll, which is beneficial to monitor the change of the water content of the entire pole piece material roll.
  • the frequency of sampling tests can be controlled as required. The higher the frequency of sampling and testing, the higher the testing accuracy can be obtained, which is more conducive to reducing the probability of pole pieces with unqualified water content entering the subsequent process.
  • the temperature control fails during the baking process, etc., resulting in inconsistent water content in different positions of the pole piece after baking, this online sampling test reflects a more significant technical effect.
  • the water content measured at the end of the roll cannot truly represent the water content in the inner layer of the roll, which may cause waste.
  • the tail of the roll may absorb water again after leaving the oven and winding, so the water content measured only at this part may not be accurate and cannot represent the water content of other pole pieces in the entire roll.
  • the on-line sampling test assembly 8 is arranged behind the oven 2 and between the guiding roller and the winding mechanism 3 , ie, downstream of the guiding roller and upstream of the winding mechanism 3 .
  • the water content of the pole piece sample tested by the online sampling test component 8 is closer to the water content of the pole piece at each layer and position in the roll.
  • the on-line sampling test assembly 8 can also be arranged between different correction rollers such as the second correction roller 6 and the third correction roller 7, or between the correction roller and the oven 2.
  • the online sampling test assembly 8 far away from the winding roller of the winding mechanism 3, it is beneficial to prevent the pole piece from being torn off due to the interference between the pole piece traveling at high speed and the pole piece sampling. Because the pole piece is driven by traction, the tension is higher at the position close to the winding roller. Once there is interference with the sampling process, the force will have the risk of tearing the pole piece.
  • the online sampling and testing assembly 8 may include a pole piece sampling device 81 and a moisture testing device 82 .
  • the pole piece sampling device 81 can be used to cut pole piece samples online. Compared with manual sampling, this automatic sampling significantly improves sampling efficiency.
  • the moisture testing device 82 can be used to test the moisture in the received pole piece sample, and its position is set to be able to receive the pole piece sample cut by the pole piece sampling device 81 .
  • this pole piece sampling device 81 is positioned at the upper side of the battery pole piece transmission path, and this moisture testing device 82 is positioned at the lower side of the battery pole piece transmission path, and simultaneously, this pole piece sampling device 81 and this moisture test
  • the position of the device 82 is set such that the pole piece sample cut by the pole piece sampling device 81 can fall into the moisture testing device 82 through gravity and/or slideways (not shown).
  • the pole piece sampling device 81 may be arranged close to the battery pole piece 4 .
  • the position of the moisture testing device 82 may be close to the position of the battery pole piece 4 cut by the pole piece sampling device 81 , for example, below the cut position of the battery pole piece 4 .
  • the moisture testing device 82 can be arranged slightly below the cut position of the battery pole piece 4 and near the front.
  • a slide rail can also be provided to guide the cut and dropped pole piece sample, so that the pole piece sample can fall reliably. into the moisture testing device 82, received by the moisture testing device 82 and tested therein.
  • the pole piece sampling device 81 may have different implementations.
  • the pole piece sampling device 81 may include but not limited to a laser cutter, a mechanical cutter or an ultrasonic cutter.
  • the principle of laser cutting includes using the energy released when the laser beam irradiates the surface of the workpiece to melt and evaporate the workpiece to achieve the purpose of cutting.
  • the principle of mechanical cutting involves direct cutting of the workpiece using a tool such as but not limited to a punching tool or the like.
  • the principle of ultrasonic cutting includes cutting the workpiece through the vibration generated by the ultrasonic vibrator. In the case of the above cutting principle given here, suitable cutting tools can be selected in different embodiments according to needs. If necessary, in order to prevent the pole piece from being torn off during sampling, the pole piece sampling device can be moved correspondingly to the pole piece during sampling.
  • pole piece sampling device 81 may also be desirable, which will not be repeated here.
  • the pole piece sample cut by the pole piece sampling device 81 may be in the shape of a disc. In other optional embodiments, the cut pole piece samples may also be in the shape of square, triangle or any other shape. Choosing a regular shape can facilitate the calculation of the area of the pole piece sample, so it is easier to calculate its weight, and judge whether the moisture content in it meets the standard based on the weight.
  • the sampling position of the pole piece sampling device 81 may be located at the edge of the coating area of the battery pole piece 4 .
  • the baking position in the oven 2 can be considered. During 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 temperature at the two edge positions is relatively low. Therefore, the moisture at the two edge positions of the battery pole piece is also relatively high. Therefore, taking the two outer edge regions of the battery pole piece as a standard, if these edge regions can meet the water content requirement, then the middle position can also meet the water content requirement. It should be noted that, the present invention does not exclude the realization that the sampling position is located in the middle area of the coating area of the battery pole piece.
  • the sampling frequency of the pole piece sampling device 81 may be a fixed sampling frequency.
  • the fixed sampling step can be set according to specific needs. A denser sampling frequency will lead to more electrode scrap rate; a sparser sampling frequency may lead to the risk of missed detection.
  • non-fixed sampling frequencies are also possible. For example, a higher sampling frequency can be used when the dewatering system of the battery pole piece is expected to work unstable, and a lower sampling frequency can be used when the dewatering system of the battery pole piece is expected to work relatively stable.
  • the moisture testing device 82 may be an analyzer for measuring water content using the Karl Fischer method. After the moisture testing device 82 receives the pole piece sample, the pole piece sample enters into the 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, so that the pole piece sample releases moisture, and the water vapor is brought to the beaker containing the flux (such as Karl Fischer reagent) through the air flow, and the Electrodes are inserted which induce the reaction of the electrochemical potential. After the moisture released from the pole piece sample reacts with the melt 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 testing devices with different principles are also applicable; details will not be repeated here.
  • the battery electrode water removal 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 unqualified battery pole pieces according to the test result. When an unqualified battery pole piece position is identified, the control module may instruct the marking device to mark the unqualified battery pole piece position.
  • Specific marking methods may include, but are not limited to, affixing colored labels, such as yellow labels, on unqualified battery pole pieces. In this way, these unqualified battery electrode parts can be identified in the subsequent rolling process, fed back to the craftsman, and the defective products are individually selected for rework and re-baking.
  • a sealing cover 9 is also provided in the battery pole piece water removal system of the illustrated embodiment, the second deviation correction roller 6, the third deviation correction roller 7, and the online sampling test assembly 8 after the oven 2 And winding mechanism 3 etc. are all sealed in this sealing cover 9.
  • the winding mechanism 3 , the online sampling test assembly 8 and the like can be arranged in the sealing cover 9 .
  • a desiccant can be provided in the sealing cover 9 .
  • the sealing cover 9 can reduce the dew point value of the pole plate environment leaving the oven 2 by an order of magnitude.
  • the sealing cover 9 can be opened, so as to remove the completed pole piece roll from the winding mechanism 3 to enter the next rolling process.
  • the sealing cover 9 is in sealing communication with the oven 2 at the outlet end of the oven 2 .
  • another vent 10 may be provided at the end of the outlet, so that the sealing cover 9 communicates with the oven 2 .
  • the number, area, cross-sectional shape, etc. of the air vents 10 are not limited.
  • the sealed communication between the sealing cover 9 and the oven 2 can effectively provide a low-humidity environment for the pole piece sampling test and the winding process, preventing the moisture of the external environment from entering between the sealing cover 9 and the oven 2.
  • the process has adverse effects, so as to avoid rapid moisture absorption of the pole piece during the cooling process leaving the oven 2, causing the water content of the pole piece to rise again and exceed the standard, and reduce the efficiency of baking.
  • the pole piece in the inner ring is not in direct contact with the air, which can significantly reduce the possibility of water absorption of the pole piece.
  • the sealing cover 9 can be set at the sealing cover 9 to blow dry gas inlet.
  • the position, quantity, area, cross-sectional shape, air intake direction, air intake intensity, etc. of the air inlet can be set according to needs, and will not be described here.
  • the dry gas here may include, but not limited to, dry air, nitrogen, and the like.
  • the sealing cover 9 can be made of various materials, such as but not limited to plastic, metal and the like.
  • the sealing cover 9 can be made of transparent materials, such as transparent plastic, glass and the like.
  • a transparent observation window may be provided for the sealing cover 9 to facilitate inspection needs.
  • the present invention also provides a battery pole piece water removal method using the battery pole piece water removal system as described in any of the foregoing embodiments.
  • an online sampling test is performed on the battery pole piece by an online sampling test component.
  • the online sampling test component starts sampling test.
  • the pole piece sampling device 81 cuts a pole piece sample from the pole piece passing through the oven 2. After the pole piece sample falls into the moisture testing device 82, the moisture testing device 82 performs a moisture test on the pole piece sample to detect the water content therein. .
  • the non-conforming product when it is detected that the water content exceeds the standard, can be marked manually by a staff member or by a marking device.
  • the process can be human workers or automated equipment applying color markings to nonconforming products. These markings may be painted or affixed stickers or signs.
  • the pole piece material roll through dehydration is transferred away from the winding mechanism 3.
  • the defective products can be picked out according to the marks on the pole piece coil, reworked and sent back for re-baking.
  • the sealing cover 9 needs to be opened before transferring the pole piece material roll from the winding mechanism 3 . Moreover, during the dehydration process of the battery pole piece, the sealing cover 9 needs to be kept closed all the time, and the sealing cover 9 provided with an air inlet can continuously blow dry gas into the sealing cover 9 .
  • the various embodiments of the battery pole piece dewatering method can advantageously significantly improve the water removal performance of the battery pole piece dewatering system and prevent unqualified
  • the battery pole piece enters the follow-up process, which provides the possibility for the high quality and high efficiency of the battery pole piece, the battery follow-up process and the product.

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
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Abstract

The present invention relates to a battery sheet water removal system and a battery sheet water removal method. The battery sheet water removal system comprises an unwinding mechanism, an oven through which a battery sheet passes, and a winding mechanism that are arranged in sequence; an online sampling test assembly is provided between the oven and the winding mechanism; and the online sampling test assembly comprises: a sheet sampling device for cutting a sheet sample online, and a moisture test device, the position of the moisture device being set to be able to receive the sheet sample cut by the sheet sampling device and test the moisture in the sheet sample. In the battery sheet water removal method applied to the battery sheet water removal system, the battery sheet is subjected to online sampling test by means of the online sampling test assembly during the operation of the battery sheet water removal system. The battery sheet water removal system and the battery sheet water removal method advantageously prevent unqualified sheets from entering subsequent processes and reduce failure probability.

Description

电池极片除水***及电池极片除水方法Battery pole piece water removal system and battery pole piece water removal method
相关申请的交叉引用Cross References to Related Applications
本申请要求享有于2021年10月25日提交的名称为“电池极片除水***及电池极片除水方法”的中国专利申请202111243261.2的优先权，该申请的全部内容通过引用并入本文中。This application claims priority to the Chinese patent application 202111243261.2 entitled "Battery Pole Piece Water Removal System and Battery Pole Piece Water Removal Method" filed on October 25, 2021, the entire content of which is incorporated herein by reference .
技术领域technical field
本发明涉及极片制造领域；具体地说，本发明涉及电池极片除水***及电池极片除水方法。The invention relates to the field of pole piece manufacturing; in particular, the invention relates to a battery pole piece water removal system and a battery pole piece water removal method.
背景技术Background technique
锂离子电池的电极是锂离子电池的关键组成部件。The electrodes of lithium-ion batteries are the key components of lithium-ion batteries.
锂离子电池的电极在制备过程中，将正、负极微纳米颗粒材料和粘合剂、溶剂组成的含液体浆料，均匀的涂敷在集流体铜箔、铝箔表面，形成一层含溶剂的湿涂层。然后，在电池极片除水***中，使用热风吹拂湿涂层表面，从而涂层表面与热风对流换热、对流换热使湿涂层的溶剂受热蒸发去除湿涂层中的水分达到使湿涂层变干燥的目的。During the preparation process of the electrodes of lithium-ion batteries, the liquid slurry composed of positive and negative electrode micro-nano particle materials, binders, and solvents is evenly coated on the surface of the current collector copper foil and aluminum foil to form a layer of solvent-containing slurry. wet coat. Then, in the battery pole piece water removal system, hot air is used to blow the surface of the wet coating, so that the coating surface and the hot air convective heat exchange, and the convective heat exchange makes the solvent of the wet coating evaporate and remove the moisture in the wet coating to make the wet coating dry. The purpose of the coating becoming dry.
电池极片除水***通常包括放卷机构、烘箱和收卷机构。极片放卷后在高温烘箱中高速穿过，热风带走极片中的水分，然后在尾部收卷。一般来说，在后续工序中，会在极片尾部进行人工取样来测试极片的水含量。The battery pole piece water removal system usually includes an unwinding mechanism, an oven and a winding mechanism. After the pole piece is unrolled, it passes through a high-temperature oven at high speed, and the hot air takes away the moisture in the pole piece, and then winds up at the end. Generally speaking, in the follow-up process, artificial sampling will be carried out at the end of the pole piece to test the water content of the pole piece.
如果除水后极片水含量超标，则后期将会导致电芯性能恶化、循环寿命衰减过快、内阻增大等异常并最终使电芯失效。并且，一旦水含量超标的极片被制成电芯以及到达客户端之后就难以识别这种缺陷，也没有办法 进行返工，只能等待电芯失效后进行报废处理，造成原材料的浪费。If the water content of the pole piece exceeds the standard after water removal, it will lead to deterioration of battery performance, excessive cycle life decay, increased internal resistance and other abnormalities in the later stage, and eventually the battery will fail. Moreover, once the pole piece with excessive water content is made into a cell and arrives at the client, it is difficult to identify the defect, and there is no way to rework it. It can only be scrapped after the cell fails, resulting in a waste of raw materials.
因此，控制极片除水后的水含量在电芯生产中极其重要，需要避免不合格的极片进入后续工序，降低失效概率。Therefore, controlling the water content of the pole piece after water removal is extremely important in the production of batteries, and it is necessary to prevent unqualified pole pieces from entering the subsequent process and reduce the probability of failure.
发明内容Contents of the invention
有鉴于此，本发明提供了电池极片除水***及电池极片除水方法，从而解决或者至少缓解了现有技术中存在的上述技术问题和其它方面问题中的一个或多个。In view of this, the present invention provides a battery pole piece water removal system and a battery pole piece water removal method, thereby solving or at least alleviating one or more of the above-mentioned technical problems and other problems existing in the prior art.
首先，根据本发明的一个方面，提供了一种电池极片除水***，其中，所述电池极片除水***包括顺次布置的放卷机构、供电池极片穿过的烘箱和收卷机构，并且，在所述烘箱和所述收卷机构之间布置有在线取样测试组件，所述在线取样测试组件包括：用于在线切取极片样本的极片取样装置；以及水分测试装置，所述水分测试装置的位置设置成能够接收所述极片取样装置切取的极片样本并且测试所接收的极片样本中的水分。通过在线取样测试组件的在线取样测试，能够获取极片料卷的不同位置处的水含量，这些位置将对应于收卷后的极片料卷的内圈及外圈的不同的各层，因此有利于监控整个料卷的水含量变化，能够有效地解决水含量不合格的极片流入到下一工序的问题，降低失效概率。First, according to one aspect of the present invention, a battery pole piece water removal system is provided, wherein the battery pole piece water removal system includes an unwinding mechanism arranged in sequence, an oven for the battery pole piece to pass through, and a winding mechanism, and an online sampling test assembly is arranged between the oven and the winding mechanism, the online sampling test assembly includes: a pole piece sampling device for cutting pole piece samples online; and a moisture testing device, the The position of the moisture testing device is set to be able to receive the pole piece sample cut by the pole piece sampling device and test the moisture in the received pole piece sample. Through the online sampling test of the online sampling test component, the water content at different positions of the pole piece material roll can be obtained, and these positions will correspond to different layers of the inner ring and the outer ring of the pole piece material roll after winding, so It is beneficial to monitor the change of the water content of the entire material roll, and can effectively solve the problem that the pole pieces with unqualified water content flow into the next process and reduce the failure probability.
可选地，在如前所述的电池极片除水***中，在所述烘箱与所述收卷机构之间布置有纠偏辊，所述在线取样测试组件布置在所述纠偏辊的上游。受牵引力的影响，极片在接近收卷机构的收卷辊处张力更大。将在线取样测试组件布置在纠偏辊的上游，有利于减小取样时扯断极片的风险。Optionally, in the aforementioned battery pole piece dewatering system, a deflection correction roller is arranged between the oven and the winding mechanism, and the online sampling test assembly is arranged upstream of the deflection correction roller. Affected by the traction force, the tension of the pole piece is higher near the winding roller of the winding mechanism. Arranging the online sampling test assembly upstream of the rectifying roller is beneficial to reduce the risk of tearing off the pole piece during sampling.
可选地，在如前所述的电池极片除水***中，所述电池极片除水***进一步包括：控制模块；以及位于所述烘箱与所述收卷机构之间的标记装置，其中，所述控制模块实时接收所述水分测试装置的测试结果并且依据所述测试结果识别不合格的电池极片部位，并且，在识别到不合格的电池极片部位时，所述控制模块指示所述标记装置标记所述不合格的电池极片 部位。通过提供标记装置自动标记不合格品，相比于人工标记而言，可靠性更高，并且标记质量一致性更好。Optionally, in the aforementioned battery pole piece water removal system, the battery pole piece water removal system further includes: a control module; and a marking device located 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 position according to the test result, and when the unqualified battery pole piece position is identified, the control module instructs the The marking device marks the unqualified battery pole pieces. By providing a marking device to automatically mark non-conforming products, compared with manual marking, the reliability is higher, and the marking quality consistency is better.
可选地，在如前所述的电池极片除水***中，所述极片取样装置位于电池极片传送路径的上侧，所述水分测试装置位于所述电池极片传送路径的下侧，并且，所述极片取样装置和所述水分测试装置的位置设置成使得所述极片取样装置切取的所述极片样本能够通过重力和/或滑道落入所述水分测试装置。通过如此设置能够可靠地保证极片样本进入水分测试装置完成水含量测试。Optionally, in the aforementioned battery pole piece water removal system, the pole piece sampling device is located on the upper side of the battery pole piece conveying path, and the moisture testing device is located on the lower side of the battery pole piece conveying path , and, the positions of the pole piece sampling device and the moisture testing device are set 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 slideway. Such setting can reliably ensure that the pole piece sample enters the moisture testing device to complete the water content test.
可选地，在如前所述的电池极片除水***中，所述电池极片除水***进一步具有能够打开的密封罩，所述收卷机构、所述在线取样测试组件均位于所述密封罩内，并且所述密封罩在所述烘箱的出料口端与所述烘箱密封地连通。该密封罩与烘箱之间的密封连通能够有效地为极片取样测试和收卷过程提供低湿度的环境，防止外部环境的潮湿在密封罩和烘箱之间进入而对此过程产生不利影响，避免极片在离开烘箱的冷却过程中快速吸湿，导致极片水含量超标。Optionally, in the aforementioned battery pole piece water removal system, the battery pole piece water removal system further has an openable sealing cover, and the winding mechanism and the online sampling test assembly are located in the and the sealing cover is in airtight communication with the oven at the outlet end of the oven. The sealed communication between the sealed cover and the oven can effectively provide a low-humidity environment for the pole piece sampling test and winding process, preventing the moisture of the external environment from entering between the sealed cover and the oven to adversely affect the process, avoiding The pole piece absorbs moisture quickly during the cooling process leaving the oven, resulting in excessive water content in the pole piece.
可选地，在如前所述的电池极片除水***中，在所述密封罩内放置有干燥剂，或者，在所述密封罩处设置有用于朝所述密封罩内部吹送干燥气体的进气口。干燥剂和干燥气体均可以有助于进一步改善密封罩内的低温度环境。Optionally, in the above-mentioned battery pole piece water removal system, a desiccant is placed in the sealed cover, or a device for blowing dry gas toward the inside of the sealed cover is provided at the sealed cover. air intake. Both desiccant and drying gas can help to further improve the low temperature environment within the enclosure.
可选地，在如前所述的电池极片除水***中，所述密封罩具有透明的观察窗。该观察窗的提供使得工作人员在巡检时能够观察到密封罩内部的取样测试环节。Optionally, in the aforementioned battery pole piece water removal system, the sealing cover has a transparent observation window. The provision of the observation window enables the staff to observe the sampling and testing process inside the sealing cover during inspection.
可选地，在如前所述的电池极片除水***中，所述极片取样装置为激光切割机、机械切割机或超声波切割机。Optionally, in the aforementioned battery pole piece water removal system, the pole piece sampling device is a laser cutter, a mechanical cutter or an ultrasonic cutter.
可选地，在如前所述的电池极片除水***中，所述极片取样装置的取样位置位于所述电池极片的涂层区的边缘处。Optionally, in the aforementioned battery pole piece water removal system, the sampling position of the pole piece sampling device is located at the edge of the coating area of the battery pole piece.
可选地，在如前所述的电池极片除水***中，所述极片取样装置以固 定的取样频率在所述电池极片上切取极片样本，或者，所述极片取样装置根据电池极片除水***的稳定性以变化的取样频率在所述电池极片上切取极片样本。Optionally, in the aforementioned battery pole piece water removal system, the pole piece sampling device cuts pole piece samples on the battery pole piece at a fixed sampling frequency, or, the pole piece sampling device Stability of the Pole Piece Dewatering System Pole piece samples were cut on the battery pole pieces at varying sampling frequencies.
其次，根据本发明的另一方面，提供了一种用于如前述方面中任一项所述的电池极片除水***的电池极片除水方法，其中，在所述电池极片除水***的运转期间，通过所述在线取样测试组件对所述电池极片进行在线取样测试。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 the battery pole piece dewatering method During the operation of the system, an online sampling test is performed on the battery pole piece through the online sampling test component.
可选地，在如前所述的电池极片除水方法中，所述电池极片除水方法进一步包括如下步骤：在检测到极片样本的水含量超标时，通过工作人员手动或者通过标记设备自动对不合格品进行标记。Optionally, in the battery pole piece water removal method as described above, the battery pole piece water removal method further includes the following steps: when it is detected that the water content of the pole piece sample exceeds the standard, manually or by marking The equipment automatically marks the unqualified products.
可选地，在如前所述的电池极片除水方法中，所述电池极片除水***进一步具有能够打开的密封罩，所述收卷机构、所述在线取样测试组件均位于所述密封罩内，并且所述密封罩在所述烘箱的出料口端与所述烘箱密封地连通，其中，在对所述电池极片进行除水的过程中，所述密封罩始终保持闭合。在对所述电池极片进行除水的过程中，所述密封罩始终保持闭合，能够有效地保持密封罩内的低温度环境。Optionally, in the battery pole piece water removal method as described above, the battery pole piece water removal system further has a sealed cover that can be opened, and the winding mechanism and the online sampling test assembly are located in the and the sealing cover is in airtight communication with the oven at the outlet end of the oven, wherein the sealing cover is always kept closed during the process of dewatering the battery pole piece. During the process of removing water from the battery pole piece, the sealing cover is always kept closed, which can effectively maintain the low temperature environment in the sealing cover.
可选地，在如前所述的电池极片除水方法中，在所述密封罩中放置有干燥剂，或者，在所述密封罩的闭合期间持续向所述密封罩内部吹送干燥气体。干燥剂和干燥气体均可以有助于进一步改善密封罩内的低温度环境。Optionally, in the aforementioned method for removing water from the battery pole piece, a desiccant is placed in the sealing cover, or a drying gas is continuously blown into the sealing cover during closing of the sealing cover. Both desiccant and drying gas can help to further improve the low temperature environment within the enclosure.
从与附图相结合的以下详细描述中，可以清楚地理解根据本发明的各技术方案的原理、特点、特征以及优点等。采用本发明的方案可以克服或者至少缓解现有电池极片除水***或电池极片除水方法中存在的缺陷或不足，尤其能够有利地防止不合格的电池极片进入电池极片及电池的后续工序，降低失效概率。From the following detailed description combined with the accompanying drawings, one can clearly understand the principles, characteristics, characteristics and advantages of each technical solution according to the present invention. Adopting the scheme of the present invention can overcome or at least alleviate the defects or deficiencies existing in the existing battery pole piece water removal system or battery pole piece water removal method, and can especially advantageously prevent unqualified battery pole pieces from entering into the battery pole piece and the battery pole pieces. Subsequent processes to reduce the probability of failure.
附图说明Description of drawings
参照附图，通过对本发明的示例性实施例的如下详细描述，本发明的 其它特征及其优点将会变得更加清楚；但是应当了解，附图仅用于描述的目的而不对本发明的范围构成限制。图中，With reference to the accompanying drawings, other features and advantages of the present invention will become more apparent through the following detailed description of exemplary embodiments of the present invention; but it should be understood that the accompanying drawings are only for the purpose of description and do not limit the scope of the present invention. constituting a restriction. In the figure,
图1示意性地示出了本发明的一个实施例的电池极片除水***。Fig. 1 schematically shows a battery pole piece water removal system according to an embodiment of the present invention.
附图标记：Reference signs:
1-放卷机构；2-烘箱；3-收卷机构；4-电池极片；5-第一纠偏辊；6-第二纠偏辊；7-第三纠偏辊；8-在线取样测试组件；81-极片取样装置；82-水分测试装置；9-密封罩；10-通气口。1-unwinding mechanism; 2-oven; 3-rewinding mechanism; 4-battery pole piece; 5-first deviation correction roller; 6-second deviation correction roller; 7-third deviation correction roller; 8-on-line sampling test components; 81-electrode sampling device; 82-moisture testing device; 9-sealed cover; 10-air vent.
具体实施方式Detailed ways
下面结合附图详细描述本发明的示例性实施例。附图中的各组成和结构仅为示意性的，并非按必然的比例绘制。应当了解，除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值等仅为描述性的，而不用于限制本发明的范围。Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The components and structures in the drawings are only schematic and not necessarily drawn to scale. It should be understood that the relative arrangements of components and steps, numerical expressions and numerical values, etc., set forth in these embodiments are only descriptive, and are not intended to limit the scope of the present invention, unless specifically stated otherwise.
在本文中，术语“第一”、“第二”仅用于进行区分性表述目的而无意于表示它们的顺序和相对重要性。Herein, the terms "first" and "second" are only used for the purpose of distinguishing expressions and are not intended to indicate their order and relative importance.
此外，对于在本文所提及的实施例中予以描述或隐含的任意单个技术特征，或者被显示或隐含在附图中的任意单个技术特征，本发明仍然允许在这些技术特征(或其等同物)之间继续进行任意组合或者增删而不存在任何的技术障碍，从而应当认为这些根据本发明的更多实施例是在本文的记载范围之内。另外，为了简洁起见，在本文中不多赘述已经被本领域技术人员公知的一般事项，例如锂电池制造领域中常使用的涂布工序、烘烤工序、轧制工序的基本工作原理等内容。In addition, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, the present invention still allows Equivalents) continue to be combined or added or deleted without any technical barriers, so it should be considered that these more embodiments according to the present invention are within the scope of the description herein. In addition, for the sake of brevity, general matters already known to those skilled in the art will not be repeated here, such as the basic working principles of the coating process, baking process, and rolling process commonly used in the lithium battery manufacturing field.
图1示意性地示出了本发明的一个实施例的电池极片除水***。该电池极片除水***可以适用于电池极片生产的烘烤工序，介于电池极片生产的涂布工序和轧制工序之间。在涂布工序中，在箔材上施加浆料涂层构成极片。在烘烤工序中，在烘箱内对极片进行除湿，去除涂层中的水分。在 轧制工序中，增强涂层与箔材的粘接强度，同时降低极片的孔隙率。Fig. 1 schematically shows a battery pole piece water removal system according to an embodiment of the present invention. The battery pole piece water removal system can be applied to the baking process of the battery pole piece production, between the coating process and the rolling process of the battery pole piece production. In the coating process, a coating of slurry is applied to the foil to form pole pieces. In the baking process, the electrode piece is dehumidified in the oven to remove the moisture in the coating. In the rolling process, the bonding strength between the coating and the foil is enhanced, and the porosity of the pole piece is reduced at the same time.
从图中可以看出，本发明的该实施例的电池极片除水***可以包括有顺次布置的放卷机构1、供电池极片4穿过的烘箱2和收卷机构3。该电池极片除水***可以整个位于一个干燥室内，或者至少烘箱2和收卷机构3位于一个干燥室内，得以局部控制其低湿环境。It can be seen from the figure that the battery pole piece water removal system of this embodiment of the present invention may include an unwinding mechanism 1 , an oven 2 through which the battery pole piece 4 passes, and a winding mechanism 3 arranged in sequence. The battery pole piece water removal system can be entirely located in a drying room, or at least the oven 2 and the winding mechanism 3 are located in a drying room, so that the low-humidity environment can be locally controlled.
放卷机构1布置在烘箱2的上游处。在放卷机构1的放卷辊处放置自在前的涂布工序转移而来的极片料卷。从放卷机构1处的极片料卷所释放出的电池极片4被牵引向烘箱2内。在可选的实施例中，可以在放卷机构1和烘箱2之间设置有纠偏辊，用于保证极片的定向输送。进一步地，在不同的实施例中，根据具体情况，可以采用不同数量、不同布置的纠偏辊。在图中此处仅示例性地示出了一个第一纠偏辊5。The unwinding mechanism 1 is arranged upstream of the oven 2 . The pole sheet 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 material roll at the unwinding mechanism 1 is pulled into the oven 2 . In an optional embodiment, a deviation correcting roller may be arranged between the unwinding mechanism 1 and the oven 2 to ensure the directional conveyance of the pole piece. Further, in different embodiments, different numbers and different arrangements of deviation correcting rollers may be used according to specific conditions. Only one first deflection roller 5 is shown here by way of example in the figure.
烘箱2用于对穿过其中传送的电池极片4进行烘干。在烘箱2内的加热通道可以设置承载电池级片的传送装置，例如但不限于导辊等。烘箱2还可以设置有抽排气装置，用于从烘箱2抽排从电池极片4烘出的水气。在不同的实施例中，根据具体情况，烘箱2的内部可以具有不同的具体结构和布置，此处不再赘述。The oven 2 is used to dry the battery pole pieces 4 conveyed therethrough. The heating channel in the oven 2 may be provided with a conveying device for carrying battery-grade sheets, such as but not limited to guide rollers. The oven 2 may also be provided with an exhaust device for extracting moisture from the oven 2 baked out from the battery pole piece 4 . In different embodiments, the interior of the oven 2 may have different specific structures and arrangements according to specific conditions, which will not be repeated here.
收卷机构3布置在烘箱2的下游处，用于卷收经过烘箱2所烘干的电池极片4。电池极片4经过烘箱2的烘干之后，被牵引至收卷机构3，并被卷收于收卷机构3的收卷辊处。所收卷的极片料卷可备用于后续的轧制工序。在可选的实施例中，可以在烘箱2和收卷机构3之间设置有纠偏辊，用于保证极片的定向输送。进一步地，在不同的实施例中，根据具体情况，可以采用不同数量、不同布置的纠偏辊。在图中此处仅示例性地示出了两个纠偏辊，即第二纠偏辊6和第三纠偏辊7。The winding mechanism 3 is arranged downstream of the oven 2 and is used for winding up the battery pole piece 4 dried by the oven 2 . After being dried in the oven 2 , the battery pole piece 4 is pulled to the winding mechanism 3 and wound up on the winding roller of the winding mechanism 3 . The coiled pole piece stock can be prepared for the subsequent rolling process. In an optional embodiment, a deviation correcting roller may be arranged between the oven 2 and the winding mechanism 3 to ensure the directional conveyance of the pole piece. Further, in different embodiments, different numbers and different arrangements of deviation correcting rollers may be used according to specific conditions. Only two guide rollers are shown here by way of example in the figure, namely the second guide roller 6 and the third guide roller 7 .
在如图中所示的实施例中，在烘箱2和收卷机构3之间布置有在线取样测试组件8。例如，二者可以固定在电池极片除水***的机架或机座上。In the embodiment shown in the figure, an online sampling test assembly 8 is arranged between the oven 2 and the winding mechanism 3 . For example, the two can be fixed on the rack or base of the battery pole piece water removal system.
通过在烘箱2和收卷机构3之间布置该在线取样测试组件8，在电池极片除水***的运转期间，在经过烘箱2烘干的电池极片4被收卷之前被 取样并测试极片样本的水含量是否超标。在水含量不超标的情况下，允许该电池极片除水***正常进行放卷、烘烤、收卷的烘烤工序。一旦测试到极片的水含量超标，则在极片上进行标记，并在下一步轧制工序之前进行切除或者返工、重新烘烤。此时进行标记的工作可以由人工完成，或者由设备自动完成。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 water removal system, the battery pole pieces 4 dried in the oven 2 are sampled and tested before being rolled up. Whether the water content of the tablet sample exceeds the standard. Under the condition that the water content does not exceed the standard, the battery pole piece water removal system is allowed to perform the baking process of unwinding, baking, and winding normally. Once it is tested that the water content of the pole piece exceeds the standard, mark it on the pole piece, and cut off or rework and re-baked before the next rolling process. At this time, the marking work can be done manually or automatically by the equipment.
在此，通过在线对电池极片4进行取样然后进行测试，能够测试极片料卷中极片的不同位置的水含量，能够基本上代表整个料卷的水含量。具体而言，其不仅能够测量到料卷外层的水含量，而且也能够测量到料卷内层的水含量，有利于监控整个极片料卷的水含量变化。在不同的实施例中，为了实现不同的测试精度，可以根据需要控制取样测试的频次。取样测试的频次越高，则可以得到越高的测试精度，越有利于降低水含量不合格的极片进入后续工序的机率。尤其是在极片来料水含量不一致、烘烤过程中温控失效等导致烘烤后极片不同位置水含量仍不一致的情况下，这种在线取样测试体现了更为显著的技术效果。Here, by sampling the battery pole piece 4 online and then testing it, the water content at different positions of the pole piece in the pole piece roll can be tested, which can basically represent the water content of the entire roll. Specifically, it can not only measure the water content of the outer layer of the material roll, but also measure the water content of the inner layer of the material roll, which is beneficial to monitor the change of the water content of the entire pole piece material roll. In different embodiments, in order to achieve different test accuracies, the frequency of sampling tests can be controlled as required. The higher the frequency of sampling and testing, the higher the testing accuracy can be obtained, which is more conducive to reducing the probability of pole pieces with unqualified water content entering the subsequent process. Especially when the water content of the incoming pole piece is inconsistent, the temperature control fails during the baking process, etc., resulting in inconsistent water content in different positions of the pole piece after baking, this online sampling test reflects a more significant technical effect.
相对于在烘干工序结束后仅通过测试料卷尾部的水含量的情况而言，其在很大程度上提高了烘烤工序后的料卷的质量。因为，在料卷尾部测试到的水含量，并不能真实地代表料卷内层的水含量，有可能造成废品产生。另外，料卷尾部有可能在离开烘箱以及收卷之后再次吸水，所以仅仅在该部位测得的水含量可能并不准确、不能代表整个料卷其它各处极片的水含量。Compared with the case of only testing the water content at the end of the roll after the drying process, it greatly improves the quality of the roll after the drying process. Because the water content measured at the end of the roll cannot truly represent the water content in the inner layer of the roll, which may cause waste. In addition, the tail of the roll may absorb water again after leaving the oven and winding, so the water content measured only at this part may not be accurate and cannot represent the water content of other pole pieces in the entire roll.
另外，通过在线对电池极片4进行取样然后进行测试，相对于直接对传送中的极片进行测试而言，不仅不会影响极片的正常生产效率，而且也实现了更可靠的测试结果，能够实现非常有益的技术效果。In addition, by sampling the battery pole piece 4 online and then testing it, compared with directly testing the pole piece in transmission, not only will not affect the normal production efficiency of the pole piece, but also achieve more reliable test results. Very beneficial technical effects can be achieved.
在图示实施例中，在线取样测试组件8布置在烘箱2之后，并且在纠偏辊与收卷机构3之间，即，在纠偏辊的下游、在收卷机构3的上游。在该布置中，在线取样测试组件8测试到的极片样本水含量更接近于料卷中各层、各个位置处的极片的水含量。In the illustrated embodiment, the on-line sampling test assembly 8 is arranged behind the oven 2 and between the guiding roller and the winding mechanism 3 , ie, downstream of the guiding roller and upstream of the winding mechanism 3 . In this arrangement, the water content of the pole piece sample tested by the online sampling test component 8 is closer to the water content of the pole piece at each layer and position in the roll.
在可选的实施例中，也可以将在线取样测试组件8布置在不同纠偏辊 例如第二纠偏辊6和第三纠偏辊7之间、或者布置在纠偏辊与烘箱2之间。通过这样将在线取样测试组件8布置得远离收卷机构3的收卷辊，有利于防止高速行进的极片与极片取样之间产生的干涉将极片扯断。因为极片受到牵引行进，在接近收卷辊的位置处张力更大，一旦在此与取样过程发生干涉，作用力会有将极片扯断的风险。In an optional embodiment, the on-line sampling test assembly 8 can also be arranged between different correction rollers such as the second correction roller 6 and the third correction roller 7, or between the correction roller and the oven 2. By arranging the online sampling test assembly 8 far away from the winding roller of the winding mechanism 3, it is beneficial to prevent the pole piece from being torn off due to the interference between the pole piece traveling at high speed and the pole piece sampling. Because the pole piece is driven by traction, the tension is higher at the position close to the winding roller. Once there is interference with the sampling process, the force will have the risk of tearing the pole piece.
从图1中可以看出，在本发明的该实施例中，该在线取样测试组件8可以包括极片取样装置81和水分测试装置82。该极片取样装置81可以用于在线切取极片样本。相对于人工取样而言，这种自动取样显著地提高了取样效率。该水分测试装置82可以用于测试所接收的极片样本中的水分，并且其位置设置成能够接收极片取样装置81所切取的极片样本。As can be seen from FIG. 1 , in this embodiment of the present invention, the online sampling and testing assembly 8 may include a pole piece sampling device 81 and a moisture testing device 82 . The pole piece sampling device 81 can be used to cut pole piece samples online. Compared with manual sampling, this automatic sampling significantly improves sampling efficiency. The moisture testing device 82 can be used to test the moisture in the received pole piece sample, and its position is set to be able to receive the pole piece sample cut by the pole piece sampling device 81 .
在图中的示例中，该极片取样装置81位于电池极片传送路径的上侧，该水分测试装置82位于电池极片传送路径的下侧，同时，该极片取样装置81和该水分测试装置82的位置设置成使得该极片取样装置81切取的极片样本能够通过重力和/或滑道(未图示)落入该水分测试装置82。In the example in the figure, this pole piece sampling device 81 is positioned at the upper side of the battery pole piece transmission path, and this moisture testing device 82 is positioned at the lower side of the battery pole piece transmission path, and simultaneously, this pole piece sampling device 81 and this moisture test The position of the device 82 is set such that the pole piece sample cut by the pole piece sampling device 81 can fall into the moisture testing device 82 through gravity and/or slideways (not shown).
例如，极片取样装置81可以靠近电池极片4布置。水分测试装置82的位置可以靠近被极片取样装置81切取的电池极片4的位置，例如在电池极片4的被切割位置的下方。同时，考虑到电池极片4的高速行进，水分测试装置82可以布置在电池极片4的被切割位置的下方稍靠前部位置。另外，如果极片样本的落下距离较远，或者考虑到电池极片4的高速行进，还可以设置有滑轨，用于引导所切割后落下的极片样本，使极片样本能够可靠地落到水分测试装置82内，被水分测试装置82接收并在其中进行测试。For example, the pole piece sampling device 81 may be arranged close to the battery pole piece 4 . The position of the moisture testing device 82 may be close to the position of the battery pole piece 4 cut by the pole piece sampling device 81 , for example, below the cut position of the battery pole piece 4 . At the same time, considering the high-speed travel of the battery pole piece 4 , the moisture testing device 82 can be arranged slightly below the cut position of the battery pole piece 4 and near the front. In addition, if the drop distance of the pole piece sample is relatively long, or considering the high-speed travel of the battery pole piece 4, a slide rail can also be provided to guide the cut and dropped pole piece sample, so that the pole piece sample can fall reliably. into the moisture testing device 82, received by the moisture testing device 82 and tested therein.
在不同的具体实施例中，极片取样装置81可以具有不同的实现方式。例如，根据具体的情况，极片取样装置81可以包括但不限于激光切割机、机械切割机或超声波切割机。激光切割的原理包括使用激光束照射到工件表面时释放的能量将工件融化并蒸发，以达到切割的目的。机械切割的原理包括使用刀具(例如但不限于冲压刀具等)直接切割工件。超声波切割的原理包括通过超声波振动子产生的振动实现切割工件。在此给出如上切 割原理的情况下，根据需要，在不同的实施例中可以选择合适的切割工具。如有必要，为了防止取样时扯断极片，可以使极片取样装置在取样时进行与极片相应的移动。In different specific embodiments, the pole piece sampling device 81 may have different implementations. For example, according to specific conditions, the pole piece sampling device 81 may include but not limited to a laser cutter, a mechanical cutter or an ultrasonic cutter. The principle of laser cutting includes using the energy released when the laser beam irradiates the surface of the workpiece to melt and evaporate the workpiece to achieve the purpose of cutting. The principle of mechanical cutting involves direct cutting of the workpiece using a tool such as but not limited to a punching tool or the like. The principle of ultrasonic cutting includes cutting the workpiece through the vibration generated by the ultrasonic vibrator. In the case of the above cutting principle given here, suitable cutting tools can be selected in different embodiments according to needs. If necessary, in order to prevent the pole piece from being torn off during sampling, the pole piece sampling device can be moved correspondingly to the pole piece during sampling.
除了上述激光切割机、机械切割机和超声波切割机之外，其它适当实现方式的极片取样装置81也有可能是可取的，此处不再赘述。In addition to the above-mentioned laser cutting machine, mechanical cutting machine and ultrasonic cutting machine, other suitable implementations of the pole piece sampling device 81 may also be desirable, which will not be repeated here.
该极片取样装置81所切取的极片样本可以呈圆片的形状。在可选的其它实施例中，所切取的极片样本也可以呈方形、三角形以及其它任何形状。选取规则形状能够便于计算极片样本的面积，因而更易于计算其重量，并且基于重量判断其中水分含量是否达标。The pole piece sample cut by the pole piece sampling device 81 may be in the shape of a disc. In other optional embodiments, the cut pole piece samples may also be in the shape of square, triangle or any other shape. Choosing a regular shape can facilitate the calculation of the area of the pole piece sample, so it is easier to calculate its weight, and judge whether the moisture content in it meets the standard based on the weight.
在电池极片除水***的一个实施例中，极片取样装置81的取样位置可以位于电池极片4的涂层区的边缘处。关于该取样位置，可以考虑烘箱2中的烘烤位置。在烘箱2内的烘烤过程中，电池极片4的中间位置烘烤温度最高，两个边缘位置处烘烤温度相对较低。所以，电池极片的两个边缘位置处的水分也相对较高。因此，以电池极片的两个外侧边缘区域为标准，如果这些边缘区域能够满足水含量要求，则在中间的位置处也能够满足水含量要求。需要说明的是，本发明中并不排除取样位置位于电池极片的涂层区的中间区域的实现方式。In an embodiment of the battery pole piece water removal system, the sampling position of the pole piece sampling device 81 may be located at the edge of the coating area of the battery pole piece 4 . As for the sampling position, the baking position in the oven 2 can be considered. During 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 temperature at the two edge positions is relatively low. Therefore, the moisture at the two edge positions of the battery pole piece is also relatively high. Therefore, taking the two outer edge regions of the battery pole piece as a standard, if these edge regions can meet the water content requirement, then the middle position can also meet the water content requirement. It should be noted that, the present invention does not exclude the realization that the sampling position is located in the middle area of the coating area of the battery pole piece.
在一个实施例中，极片取样装置81的取样频率可以为固定取样频率。该固定取样步骤可以根据具体需要进行设定。较密集的取样频率将导致更多的极片报废率；较稀疏的取样频率可能会导致漏测的风险。在其它实施例中，非固定的取样频率也是可行的。例如，在可以预计电池极片除水***工作不稳定的时候可以采用较高的取样频率，在可以预计电池极片除水***工作比较稳定的时候可以采用较低的取样频率。In one embodiment, the sampling frequency of the pole piece sampling device 81 may be a fixed sampling frequency. The fixed sampling step can be set according to specific needs. A denser sampling frequency will lead to more electrode scrap rate; a sparser sampling frequency may lead to the risk of missed detection. In other embodiments, non-fixed sampling frequencies are also possible. For example, a higher sampling frequency can be used when the dewatering system of the battery pole piece is expected to work unstable, and a lower sampling frequency can be used when the dewatering system of the battery pole piece is expected to work relatively stable.
在图示的实施例中，水分测试装置82可以是利用卡尔费休法测定水含量的测定仪。在水分测试装置82接收到极片样本后，极片样本进入到水分测试装置82的容器内。此时，将该容器进行封口，然后通过高温对极片样本进行加热，使极片样本释放出水分，水分蒸气通过气流被带到装有熔剂(例如卡尔费休试剂)的烧杯里，熔剂中插有能感应出电化学电位的反 应的电极。当极片样本释放出的水分和熔剂中的熔质发生反应后，水分测试装置82基于对应的电化学电位差异显示出水含量。在此需要说明的是，不同原理的水分测试装置也是适用的；此处不再赘述。In the illustrated embodiment, the moisture testing device 82 may be an analyzer for measuring water content using the Karl Fischer method. After the moisture testing device 82 receives the pole piece sample, the pole piece sample enters into the 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, so that the pole piece sample releases moisture, and the water vapor is brought to the beaker containing the flux (such as Karl Fischer reagent) through the air flow, and the Electrodes are inserted which induce the reaction of the electrochemical potential. After the moisture released from the pole piece sample reacts with the melt 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 testing devices with different principles are also applicable; details will not be repeated here.
电池极片除水***可以进一步包括控制模块(未图示)以及位于烘箱2与收卷机构3之间的标记装置。该控制模块可以实时接收水分测试装置8的测试结果并且依据该测试结果识别不合格的电池极片部位。在识别到不合格的电池极片部位时，控制模块可以指示标记装置标记该不合格的电池极片部位。具体标记方式可以包括但不限于在不合格的电池极片部位上贴上有颜色的标贴，例如黄标。这样，在后续的轧制工序中可以识别出这些不合格的电池极片部分，将其反馈给工艺人员，把不良品单独挑选出来并进行返工、重新烘烤。The battery electrode water removal 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 unqualified battery pole pieces according to the test result. When an unqualified battery pole piece position is identified, the control module may instruct the marking device to mark the unqualified battery pole piece position. Specific marking methods may include, but are not limited to, affixing colored labels, such as yellow labels, on unqualified battery pole pieces. In this way, these unqualified battery electrode parts can be identified in the subsequent rolling process, fed back to the craftsman, and the defective products are individually selected for rework and re-baking.
从图1中还可以看出，在图示实施例的电池极片除水***中还提供了密封罩9，烘箱2之后的第二纠偏辊6、第三纠偏辊7、在线取样测试组件8及收卷机构3等均被密封在该密封罩9内。在不设置纠偏辊的情况下，可以将收卷机构3、在线取样测试组件8等布置在密封罩9内。密封罩9内可以提供有干燥剂。与前面所提到的干燥室相比，该密封罩9能够成数量级地降低内离开烘箱2的极片境的露点值。该密封罩9是能够打开的，以便于从其中移除收卷机构3处收卷完成的极片料卷，进入下一步的轧制工序。It can also be seen from Fig. 1 that a sealing cover 9 is also provided in the battery pole piece water removal system of the illustrated embodiment, the second deviation correction roller 6, the third deviation correction roller 7, and the online sampling test assembly 8 after the oven 2 And winding mechanism 3 etc. are all sealed in this sealing cover 9. In the case where no deviation correction roller is provided, the winding mechanism 3 , the online sampling test assembly 8 and the like can be arranged in the sealing cover 9 . A desiccant can be provided in the sealing cover 9 . Compared with the above-mentioned drying chamber, the sealing cover 9 can reduce the dew point value of the pole plate environment leaving the oven 2 by an order of magnitude. The sealing cover 9 can be opened, so as to remove the completed pole piece roll from the winding mechanism 3 to enter the next rolling process.
该密封罩9在烘箱2的出料口端与烘箱2密封地连通。例如，如图中所示，除了电池极片4穿过的出料口位置之外，在该出料口端还可以设置有另外的通气口10，使得密封罩9与烘箱2连通。根据不同的实施例，通气口10的数量、面积、截面形状等均可不受限制。The sealing cover 9 is in sealing communication with the oven 2 at the outlet end of the oven 2 . For example, as shown in the figure, in addition to the position of the outlet through which the battery pole piece 4 passes, another vent 10 may be provided at the end of the outlet, so that the sealing cover 9 communicates with the oven 2 . According to different embodiments, the number, area, cross-sectional shape, etc. of the air vents 10 are not limited.
另外，密封罩9与烘箱2之间的密封连通，能够有效地为极片取样测试和收卷过程提供低湿度的环境，防止外部环境的潮湿在密封罩9和烘箱2之间进入而对此过程产生不利影响，避免极片在离开烘箱2的冷却过程中快速吸湿、导致极片水含量再次升高而超标、降低烘烤的效率。在极片收卷为极片料卷后，内圈的极片不与空气直接接触，能够显著降低极片的 吸水可能性。In addition, the sealed communication between the sealing cover 9 and the oven 2 can effectively provide a low-humidity environment for the pole piece sampling test and the winding process, preventing the moisture of the external environment from entering between the sealing cover 9 and the oven 2. The process has adverse effects, so as to avoid rapid moisture absorption of the pole piece during the cooling process leaving the oven 2, causing the water content of the pole piece to rise again and exceed the standard, and reduce the efficiency of baking. After the pole piece is wound into a pole piece material roll, the pole piece in the inner ring is not in direct contact with the air, which can significantly reduce the possibility of water absorption of the pole piece.
为了进一步改善密封罩9内的低湿度环境，有利于满足极片冷却并防止极片吸湿的风险，在进一步的实施例中，可以在该密封罩9处设置用于朝密封罩9内部吹送干燥气体的进气口。该进气口的位置、数量、面积、截面形状、进气方向、进气强度等均可以根据需要进行设置，此处不再赘述。此处的干燥气体可以包括但不限于干燥空气、氮气等。In order to further improve the low-humidity environment in the sealing cover 9, it is beneficial to meet the cooling of the pole piece and prevent the risk of moisture absorption of the pole piece. In a further embodiment, it can be set at the sealing cover 9 to blow dry gas inlet. The position, quantity, area, cross-sectional shape, air intake direction, air intake intensity, etc. of the air inlet can be set according to needs, and will not be described here. The dry gas here may include, but not limited to, dry air, nitrogen, and the like.
该密封罩9可以由各种材料制成，例如但不限于塑料、金属等。为了巡检方便，使工作人员能够观察到密封罩9内部的操作情况，可以采用透明材料制造密封罩9，例如透明塑料、玻璃等。或者，当采用不透明材料制造密封罩9的情况下，可以为密封罩9提供透明的观察窗，以利于巡检需要。The sealing cover 9 can be made of various materials, such as but not limited to plastic, metal and the like. For the convenience of inspection, so that the staff can observe the operation inside the sealing cover 9, the sealing cover 9 can be made of transparent materials, such as transparent plastic, glass and the like. Alternatively, when the sealing cover 9 is made of an opaque material, a transparent observation window may be provided for the sealing cover 9 to facilitate inspection needs.
综合以上描述，结合附图1可以了解，这种电池极片除水***的各个实施例，通过包括例如但不限于在线取样测试组件8、密封罩9等，有利地显著提高了电池极片除水***的除水性能，防止不合格的电池极片进入后续工序，为电池极片及电池后续工序的高质高效提供了可能。Based on the above description, it can be understood in conjunction with accompanying drawing 1 that various embodiments of this battery pole piece water removal system, by including but not limited to online sampling test components 8, sealing covers 9, etc., advantageously significantly improve battery pole piece water removal. The water removal performance of the water system prevents unqualified battery pole pieces from entering the follow-up process, and provides the possibility for high quality and high efficiency of battery pole pieces and battery follow-up processes.
除此之外，本发明还提供了使用如前述任一实施例中所述的电池极片除水***的电池极片除水方法。在这种方法的实施例中，通过在线取样测试组件对电池极片进行在线取样测试。In addition, the present invention also provides a battery pole piece water removal method using the battery pole piece water removal system as described in any of the foregoing embodiments. In an embodiment of this method, an online sampling test is performed on the battery pole piece by an online sampling test component.
具体地，根据这种方法，在电池极片除水***启动后，在线取样测试组件开始取样测试。Specifically, according to this method, after the battery pole piece water removal system is started, the online sampling test component starts sampling test.
具体地，极片取样装置81在经过烘箱2的极片上切取极片样本，在极片样本落入水分测试装置82内之后，水分测试装置82对极片样本进行水分测试，检测其中的水含量。Specifically, the pole piece sampling device 81 cuts a pole piece sample from the pole piece passing through the oven 2. After the pole piece sample falls into the moisture testing device 82, the moisture testing device 82 performs a moisture test on the pole piece sample to detect the water content therein. .
根据具体的实施例，在检测到水含量超标时，可以通过工作人员手动或者通过标记设备进行不合格品标记。该过程可以是工作人员或自动设备向不合格品上施用颜色标记。这些标记可以是涂上或贴上的标贴或者记号。According to a specific embodiment, when it is detected that the water content exceeds the standard, the non-conforming product can be marked manually by a staff member or by a marking device. The process can be human workers or automated equipment applying color markings to nonconforming products. These markings may be painted or affixed stickers or signs.
当完成整卷极片的取样测试之后，将经过除水的极片料卷转移离开收 卷机构3。在后续的轧制工序中，可以根据极片料卷上的标记挑出不良品，将其返工、送回重新烘烤。After finishing the sampling test of the whole roll of pole piece, the pole piece material roll through dehydration is transferred away from the winding mechanism 3. In the subsequent rolling process, the defective products can be picked out according to the marks on the pole piece coil, reworked and sent back for re-baking.
在电池极片除水***具有密封罩9的情况下，在电池极片除水方法的可选实施例中，在从收卷机构3转移极片料卷之前，还需要打开密封罩9。并且，在电池极片的除水过程中，密封罩9需要始终保持闭合，提供了进气口的密封罩9可以不断地向密封罩9内部吹送干燥气体。In the case that the battery pole piece water removal system has a sealing cover 9 , in an optional embodiment of the battery pole piece water removal method, the sealing cover 9 needs to be opened before transferring the pole piece material roll from the winding mechanism 3 . Moreover, during the dehydration process of the battery pole piece, the sealing cover 9 needs to be kept closed all the time, and the sealing cover 9 provided with an air inlet can continuously blow dry gas into the sealing cover 9 .
综合以上描述，结合附图1的电池极片除水***，可以了解，这种电池极片除水方法的各个实施例能够有利地显著提高电池极片除水***的除水性能，防止不合格的电池极片进入后续工序，为电池极片及电池后续工序及产品的高质高效提供了可能。Based on the above description, combined with the battery pole piece dewatering system in Fig. 1, it can be understood that the various embodiments of the battery pole piece dewatering method can advantageously significantly improve the water removal performance of the battery pole piece dewatering system and prevent unqualified The battery pole piece enters the follow-up process, which provides the possibility for the high quality and high efficiency of the battery pole piece, the battery follow-up process and the product.
以上示例性地描述了根据本发明的电池极片除水***及电池极片除水方法的一些实施例。在不偏离所描述的各实施例的范围和精神的情况下，本技术领域的技术人员能够对各实施例及其中的特征做出增减或修改。所有等同的技术方案均应属于本发明的范畴并被认为落入本发明的范围。The above exemplarily described some embodiments of the battery pole piece water removal system and the battery pole piece water removal method according to the present invention. Those skilled in the art can make additions, subtractions, or modifications to the embodiments and the features thereof without departing from the scope and spirit of the described embodiments. All equivalent technical solutions shall belong to the category of the present invention and shall be deemed to fall within the scope of the present invention.

Claims (14)

  1. 一种电池极片除水***，其特征在于，所述电池极片除水***包括顺次布置的放卷机构(1)、供电池极片(4)穿过的烘箱(2)和收卷机构(3)，并且，在所述烘箱(2)和所述收卷机构(3)之间布置有在线取样测试组件(8)，所述在线取样测试组件(8)包括：A battery pole piece water removal system, characterized in that the battery pole piece water removal system includes a sequentially arranged unwinding mechanism (1), an oven (2) for the battery pole piece (4) to pass through, and a winding mechanism (3), and an online sampling test assembly (8) is arranged between the oven (2) and the winding mechanism (3), and the online sampling test assembly (8) includes:
    用于在线切取极片样本的极片取样装置(81)；以及A pole piece sampling device (81) for cutting pole piece samples online; and
    水分测试装置(82)，所述水分测试装置(82)的位置设置成能够接收所述极片取样装置(81)切取的极片样本并且测试所接收的极片样本中的水分。A moisture testing device (82), the position of the moisture testing device (82) is set to be able to receive the pole piece sample cut by the pole piece sampling device (81) and test the moisture in the received pole piece sample.
  2. 根据权利要求1所述的电池极片除水***，其中，在所述烘箱(2)与所述收卷机构(3)之间布置有纠偏辊，所述在线取样测试组件布置在所述纠偏辊的上游。The battery pole piece water removal system according to claim 1, wherein a deviation correction roller is arranged between the oven (2) and the winding mechanism (3), and the online sampling test assembly is arranged on the deviation correction upstream of the roller.
  3. 根据权利要求1或2所述的电池极片除水***，其中，所述电池极片除水***进一步包括：The battery pole piece water removal system according to claim 1 or 2, wherein the battery pole piece water removal system further comprises:
    控制模块；以及control module; and
    位于所述烘箱(2)与所述收卷机构(3)之间的标记装置，marking means located between said oven (2) and said winding mechanism (3),
    其中，所述控制模块实时接收所述水分测试装置(82)的测试结果并且依据所述测试结果识别不合格的电池极片部位，并且，在识别到不合格的电池极片部位时，所述控制模块指示所述标记装置标记所述不合格的电池极片部位。Wherein, the control module receives the test result of the moisture testing device (82) in real time and identifies the unqualified battery pole piece position according to the test result, and when the unqualified battery pole piece position is identified, the The control module instructs the marking device to mark the unqualified battery pole piece position.
  4. 根据权利要求1至3中任一项所述的电池极片除水***，其中，所述极片取样装置(81)位于电池极片传送路径的上侧，所述水分测试装置(82)位于所述电池极片传送路径的下侧，并且，所述极片取样装置(81)和所述水分测试装置(82)的位置设置成使得所述极片取样装置(81)切取的所述极片样本能够通过重力和/或滑道落入所述水分测试装置(82)。The battery pole piece water removal 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, and the moisture testing device (82) is located at The lower side of the battery pole piece delivery path, and the positions of the pole piece sampling device (81) and the moisture testing device (82) are set so that the pole piece sampled by the pole piece sampling device (81) Sheet samples can be dropped into the moisture testing device (82) by gravity and/or slides.
  5. 根据权利要求1至4中任一项所述的电池极片除水***，其中， 所述电池极片除水***被构造为能够打开的密封罩(9)，所述收卷机构(3)、所述在线取样测试组件(8)均位于所述密封罩(9)内，并且所述密封罩(9)在所述烘箱(2)的出料口端与所述烘箱(2)密封地连通。The battery pole piece water removal system according to any one of claims 1 to 4, wherein the battery pole piece water removal system is configured as an openable sealing cover (9), and the winding mechanism (3) , the online sampling test assembly (8) is located in the sealed cover (9), and the sealed cover (9) is sealed with the oven (2) at the outlet end of the oven (2) connected.
  6. 根据权利要求1至5中任一项所述的电池极片除水***，其中，在所述密封罩(9)内放置有干燥剂，或者，在所述密封罩(9)处设置有用于朝所述密封罩(9)内部吹送干燥气体的进气口。The battery pole piece dewatering system according to any one of claims 1 to 5, wherein a desiccant is placed in the sealed cover (9), or a device for An air inlet for blowing dry gas toward the inside of the sealing cover (9).
  7. 根据权利要求1至6中任一项所述的电池极片除水***，其中，所述密封罩(9)具有透明的观察窗。The battery pole piece water removal system according to any one of claims 1 to 6, wherein the sealing cover (9) has a transparent observation window.
  8. 根据权利要求1至7中任一项所述的电池极片除水***，其中，所述极片取样装置(81)为激光切割机、机械切割机或超声波切割机。The battery pole piece water removal system according to any one of claims 1 to 7, wherein the pole piece sampling device (81) is a laser cutting machine, a mechanical cutting machine or an ultrasonic cutting machine.
  9. 根据权利要求1至8中任一项所述的电池极片除水***，其中，所述极片取样装置(81)的取样位置位于所述电池极片(4)的涂层区的边缘处。The battery pole piece water removal system according to any one of claims 1 to 8, wherein the sampling position of the pole piece sampling device (81) is located at the edge of the coating area of the battery pole piece (4) .
  10. 根据权利要求1至9中任一项所述的电池极片除水***，其中，所述极片取样装置(81)以固定的取样频率在所述电池极片(4)上切取极片样本，或者，所述极片取样装置(81)根据电池极片除水***的稳定性以变化的取样频率在所述电池极片(4)上切取极片样本。The battery pole piece water removal 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 changing sampling frequency according to the stability of the battery pole piece water removal system.
  11. 一种用于根据权利要求1至10中任一项所述的电池极片除水***的电池极片除水方法，其中，在所述电池极片除水***的运转期间，通过所述在线取样测试组件(8)对所述电池极片(4)进行在线取样测试。A battery pole piece water removal method for the battery pole piece water removal system according to any one of claims 1 to 10, wherein, during the operation of the battery pole piece water removal system, the online The sampling test component (8) performs an online sampling test on the battery pole piece (4).
  12. 根据权利要求11所述的电池极片除水方法，其中，所述电池极片除水方法进一步包括如下步骤：The method for removing water from a battery pole piece according to claim 11, wherein the method for removing water from a battery pole piece further comprises the following steps:
    在检测到极片样本的水含量超标时，通过工作人员手动或者通过标记设备自动对不合格品进行标记。When it is detected that the water content of the pole piece sample exceeds the standard, the unqualified products are marked manually by the staff or automatically by the marking equipment.
  13. 根据权利要求11或12所述的电池极片除水方法，其中，所述电池极片除水***被配置为能够打开的密封罩(9)，所述收卷机构(3)、 所述在线取样测试组件(8)均位于所述密封罩(9)内，并且所述密封罩(9)在所述烘箱(2)的出料口端与所述烘箱(2)密封地连通，The battery pole piece water removal method according to claim 11 or 12, wherein the battery pole piece water removal system is configured as an openable sealed cover (9), the winding mechanism (3), the online The sampling test components (8) are all located in the sealed cover (9), and the sealed cover (9) is connected to the oven (2) in a sealed manner at the outlet end of the oven (2),
    其中，在对所述电池极片(4)进行除水的过程中，所述密封罩(9)始终保持闭合。Wherein, during the process of removing water from the battery pole piece (4), the sealing cover (9) is always kept closed.
  14. 根据权利要求11至13中任一项所述的电池极片除水方法，其中，在所述密封罩(9)中放置有干燥剂，或者，在所述密封罩(9)的闭合期间持续向所述密封罩(9)内部吹送干燥气体。The battery pole piece water removal method according to any one of claims 11 to 13, wherein, a desiccant is placed in the sealing cover (9), or, during the closing of the sealing cover (9), the Drying gas is blown into the sealed cover (9).
PCT/CN2022/124688 2021-10-25 2022-10-11 Battery sheet water removal system and battery sheet water removal method WO2023071784A1 (en)

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