CN114824505A - Manufacturing process and production line system for zero deformation of winding type battery - Google Patents
Manufacturing process and production line system for zero deformation of winding type battery Download PDFInfo
- Publication number
- CN114824505A CN114824505A CN202210365519.4A CN202210365519A CN114824505A CN 114824505 A CN114824505 A CN 114824505A CN 202210365519 A CN202210365519 A CN 202210365519A CN 114824505 A CN114824505 A CN 114824505A
- Authority
- CN
- China
- Prior art keywords
- coating
- battery
- roller
- thickness
- condensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Primary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a zero-deformation manufacturing process of a winding type battery and a production line system thereof, which comprises the steps of heating a functional layer material to form a molten state, coating the molten functional layer material on a battery belt body, sequentially carrying out sheet making and winding on the coated battery pole piece to obtain a winding core body, gasifying or sublimating the functional layer material after the winding is finished, completely extracting the functional layer material from the winding core body to obtain the winding core body with sufficient expansion space, and then continuously carrying out process packaging, baking, formation and capacity division to obtain an ion battery finished product.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a manufacturing process of zero deformation of a winding type battery and a production line system thereof.
Background
After the capacity grading or the circulation of the winding type lithium ion battery for several weeks, the battery is deformed in the width direction and is S-shaped, the thickness increase of the battery caused by the S shape can reach 5-20%, the deformation seriously affects the electrical property of the battery, the size and the safety performance of the battery, and the winding type lithium ion battery is a main disadvantage of the assembly mode of the winding type battery.
The reason for battery deformation: after the battery is charged and discharged, the inner layer of the battery cell generates stress concentration along the width direction of the battery due to the expansion of the active material (mainly a negative plate) and the contraction of the diaphragm in the baking process, so that the battery plate is distorted, and the battery is bent into an S shape.
To control battery deformation, the following approaches are currently commonly used: firstly, aiming at the expansion of a pole piece, selecting an active substance with smaller charge-discharge expansion, and pre-baking the pole piece before use; secondly, selecting a diaphragm with smaller thermal shrinkage aiming at diaphragm shrinkage, and pre-baking the diaphragm before use; thirdly, the tension of the diaphragm during winding is adjusted, and the winding tension is controlled in a step-by-step variable speed mode, so that the wound roll core can have a certain space to adapt to expansion in a charge-discharge stage; embossing the positive plate to enable the positive plate to be embossed before winding to manufacture convex marks, so that the distance between the positive plate layer and the negative plate layer in the naked electric core during winding can be increased, and a negative expansion space is reserved; fifthly, in the charging and discharging process or after the charging and discharging are finished, the battery is clamped in the thickness direction by a pressure or high-temperature clamp, and the S-shaped battery core is pressed to be flat.
However, in the above methods one, two, three and four, the reserved expansion space is always limited, and the space required by the expansion of the negative electrode and the contraction of the diaphragm cannot be completely absorbed, so that the deformation of the battery can be only reduced, and the elimination cannot be avoided; and the fifth method only carries out post shaping on the deformed battery, the internal stress still exists, and the battery can still recover to deform to a great extent after charging and discharging for several weeks after the external pressure is released, so that the problem is not solved fundamentally.
Battery deformation remains a key drawback of current wound batteries and is not completely and well solved.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a zero-deformation manufacturing process of a winding type battery and a production line system thereof, which can solve the problem of internal pressure stress of the winding type battery and avoid the deformation of the battery.
The technical scheme is as follows: in order to achieve the purpose, the technical scheme of the invention is as follows:
a zero deformation manufacturing process for a wound battery, comprising:
s10: heating the functional layer material to a melting temperature and forming a molten state;
s20: putting the banded battery band body into a conveying system for conveying, and coating the functional material in a molten state on the battery band body while conveying;
s30: the coating thickness of the functional layer is calculated according to the expansion rate of the coated battery pole piece, and the standard functional layer thickness is (the total expansion rate of the anode and the cathode in the manufacturing and circulating processes) 1.0-1.5;
s40: the coated battery pole piece is subjected to sheet making and winding in sequence to obtain a winding core body;
s50: after winding, placing the roll core body with the functional layer material in an oven, baking at the temperature of 60-130 ℃, vacuumizing, gasifying or sublimating the functional layer material, and completely extracting the functional layer material from the roll core body to obtain the roll core body with sufficient expansion space;
s60: cooling and recovering the extracted functional layer material for recycling;
s70: and (5) continuously carrying out process packaging, baking, formation and capacity grading on the roll core body in the step S50 to obtain the finished product of the ion battery.
Further, in step S20, the coating thickness of the initial coating is larger than the final standard functional layer thickness, and then the coating layer is shaped so that the coating layer thickness is uniform and reaches the standard functional layer thickness.
Further, the functional layer shaping comprises the following steps:
s21: the coated battery strip body is continuously conveyed, the upper surface of the coating layer is heated, and only the upper surface layer of the coating layer is in a molten state;
s22: the functional material in a molten state is scraped, the male die is uniform, and the thickness of the coating is reduced;
s23: conveying the battery strip body in the step S22 to a cooling area for cooling, so that the functional material coating is solidified and hardened;
s24: and the battery band body in the step S23 is conveyed continuously, and the upper surface layer of the coating is cut, so that the thickness of the coating reaches the thickness of the standard functional layer.
Further, the functional material is paraffin.
Implement production line system of manufacturing process of zero deformation of a coiling formula battery, include coating device, shaping device and the gasification recovery unit of functional material that sets gradually in battery material area direction of transfer, the coating device is to the side intermittent type nature coating functional material in battery material area, and forms a plurality of banded coating strips that are the interval and set up, the shaping device carries out the plastic and reaches standard functional material thickness to a plurality of banded coating strips, the gasification recovery unit of functional material heats gasification and retrieves banded coating.
Further, the coating device includes that adjacent and parallel arrangement's material area changes the roller around roller and coating, and the one end in battery material area is passed the material area and is changed between the roller and the coating and around establishing the material area is around on the roller, be provided with at least a set of coating brush head on the circumferencial direction of roller is changeed in the coating, the brush head of coating includes the brush board, brush board elasticity sets up on the roller is changeed in the coating, the below interval that the roller was changeed in the coating is provided with scribbles the workbin, brush board intermittent type nature contact is in the battery material area under the transport condition.
Further, the plate body structure that the roller length direction set up is changeed for following the coating to the brush board, the articulated setting of one end of brush board is changeed on the roller in the coating, and the other end tangential direction changes the outside extension setting of roller surface of roller in the coating, changes the circular motion direction of roller in the coating, the link of brush board is located the front side of extension end, the brush board is provided with the elastic construction towards one side of roller in the coating.
Further, the shaping device comprises a surface melting module, a shaping plate, a curing module and a cutting device, wherein the surface melting module, the shaping plate, the curing module and the cutting module are sequentially arranged above the supporting platform in the displacement direction of the battery belt body, the surface melting module is arranged towards the coating layer on the supporting platform for heating, the shaping plate is used for tiling the melted coating layer, the curing module is arranged towards the supporting platform for cooling, and the cutting module cuts the upper surface of the solidified coating layer.
Further, the cutting module comprises a lifting mechanism and a scraper arranged on the lifting mechanism, and the scraper adjusts the distance from the cutting edge to the battery pole piece through the lifting mechanism; an air blowing module and a scrap collecting box are arranged on the airflow path of the air blowing module correspondingly to the scraper, and the airflow direction of the air blowing module is the same as the length direction of the scraper; the upper part of the supporting platform is provided with scrap cleaning cross rods at intervals, and the scrap cleaning cross rods are attached to one side of the scraper where the cutting edge is located; the scraper cleans residues on the blade through the scrap cleaning cross rod in the lifting process.
Furthermore, the functional material gasification recovery device comprises a heating box, a gas collection container, a condensation container and an air inlet pipe, wherein the inner cavity of the gas collection container is communicated with the inner cavity of the condensation container through the air inlet pipe, the condensation container comprises a condensation outer cylinder and condensation sheets arranged in the inner cavity of the condensation outer cylinder, the condensation sheets are arranged in an array mode in the circumferential direction of the condensation outer cylinder, a condensation cavity is formed between every two adjacent condensation sheets, the condensation outer cylinder is coaxially and vertically provided with a movable rod, and the bottom end of the movable rod is provided with a scraper corresponding to each condensation cavity; and the solidified substance on the wall of the condensation cavity falls off downwards through the scraper.
Has the advantages that: the invention can solve the problem of internal pressure stress of the winding battery and avoid the deformation of the battery: the battery is at the coating functional material on the positive or negative pole piece of the battery area body before convoluteing to increase the thickness of the battery area body, after convoluteing, make coating sublimation and gasification through the heating, the material of coating is appeared from taking and taking between, then the space between inner circle area and the outer lane area increases, reduce the stress between outer belt and the internal stay area, and when the battery was being heated, also had the space that can compensate the deflection between inner circle area and the outer lane area, consequently, can eliminate pressure and the stress between the area body.
Drawings
FIG. 1 is a schematic view of a battery tape body of the present invention after winding of a coating layer;
FIG. 2 is a schematic flow chart of the manufacturing process of the present invention;
FIG. 3 is a front view of the overall construction of the production line system of the present invention;
FIG. 4 is a perspective view of the overall structure of the production line system of the present invention;
FIG. 5 is a schematic perspective view of a coating apparatus of the present invention;
FIG. 6 is a schematic half-section view of a coating apparatus of the present invention;
FIG. 7 is an enlarged partial schematic view of the reshaping apparatus of the present invention;
FIG. 8 is a schematic illustration of the position of the scraper and the swarf-cleaning cross-bar of the present invention;
FIG. 9 is a schematic semi-sectional perspective view of the functional material gasification recovery apparatus of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, a manufacturing process of zero deformation of a wound battery includes:
s10: heating the functional layer material to a melting temperature and forming a molten state;
s20: putting the banded battery band body into a conveying system for conveying, and coating the functional material in a molten state on the battery band body while conveying;
s30: the coating thickness of the functional layer is calculated according to the expansion rate of the coated battery pole piece, the standard functional layer thickness is (the total expansion rate of the anode and the cathode in the manufacturing and circulating processes) x (coefficient), and the coefficient range value is 1.0-1.5; preferably 1.2;
s40: the coated battery pole piece is subjected to sheet making and winding in sequence to obtain a winding core body;
s50: after winding, placing the roll core body with the functional layer material in an oven, baking at the temperature of 60-130 ℃, vacuumizing, gasifying or sublimating the functional layer material, and completely extracting the functional layer material from the roll core body to obtain the roll core body with sufficient expansion space;
s60: cooling and recovering the extracted functional layer material for recycling;
s70: and (5) continuously carrying out process packaging, baking, formation and capacity grading on the roll core body in the step S50 to obtain the finished product of the ion battery.
The battery is at the coating functional material on the positive or negative pole piece of the battery area body before coiling to increase the thickness of the battery area body, after convoluteing, make the coating sublimation and the gasification through the heating, the material of coating is appeared from taking and taking between, then the space between inner circle area and the outer lane area increases, reduce the stress between outer layer area and the internal stay area, and when the battery is being heated, also have the space that can compensate the deflection between inner circle area and the outer lane area, consequently, can eliminate pressure and the stress between the area body.
The functional material is paraffin, but because paraffin layer is very thin, and the paraffin layer after the spraying appears irregular surface because paraffin solidifies the back, consequently need carry out the plastic to the coating, simultaneously because the thickness of paraffin coating is very little, is about 40 mu m, consequently need carry out the truing to the coating, guarantees that its thickness is even.
In step S20, the coating thickness of the initial coating is larger than the final standard functional layer thickness, and then the coating layer is shaped so that the coating layer thickness is uniform and reaches the standard functional layer thickness.
The functional layer shaping comprises the following steps:
s21: the coated battery strip body is continuously conveyed, the upper surface of the coating layer is heated, and only the upper surface layer of the coating layer is in a molten state;
s22: the functional material in a molten state is scraped, the male die is uniform, and the thickness of the coating is reduced;
s23: conveying the battery strip body in the step S22 to a cooling area for cooling, so that the functional material coating is solidified and hardened;
s24: and the battery band body in the step S23 is conveyed continuously, and the upper surface layer of the coating is cut, so that the thickness of the coating reaches the thickness of the standard functional layer.
As shown in fig. 3 and fig. 4, a production line system of manufacturing process of zero deformation of winding type battery, include coating device 1, shaping device 2 and functional material gasification recovery unit 3 that set gradually on battery material strip conveying direction, coating device 1 is to the side intermittent type nature coating functional material in battery material strip, coating layer coating is on anodal slice in this embodiment, and form a plurality of banded coating strips that are the interval and set up, many banded coating strips can reduce the use of functional material on the one hand, and can promote paraffin solidification efficiency, shorten holistic process length, on the other hand, a plurality of coating materials are high temperature resistant material, then the battery material strip is around establishing the back, can directly form the clearance between the area body of inner circle and the area body of outer lane for provide the space that battery material strip deforms, and overall structure is simple, the cost is lower. The shaping device 2 shapes a plurality of strip-shaped coating strips and achieves the thickness of a standard functional material, and the functional material gasification and recovery device 3 heats, gasifies and recovers the strip-shaped coatings.
As shown in fig. 5 and fig. 6, the coating device 1 includes a material belt winding roller 12 and a coating roller 13 which are adjacently and parallelly arranged, the material belt winding roller 12 and the battery material belt 5 relatively move, the coating roller 13 is synchronously arranged with the material belt winding roller 12 through a conveyor belt 130, one end of the battery material belt 5 passes between the material belt winding roller 12 and the coating roller 13 and is wound on the material belt winding roller 12 in a U-shaped manner, at least one group of coating brush heads 15 are arranged in the circumferential direction of the coating roller 13, the number of the coating brush heads can be adjusted according to the coating interval of different requirements, the coating brush heads 15 include brush plates 17, the brush plates 17 are elastically arranged on the coating roller 13, a coating material tank 14 is arranged below the coating roller 13 at an interval, the coating material tank 14 contains liquid coating material, the coating brush heads 15 pass through the interior of the coating material tank 14 in a rotating state, adhering the coating by coating the brush head; the brush plate 17 intermittently contacts the battery material belt in a conveying state.
The plate body structure that brush board 17 set up for changeing roller length direction along the coating, the articulated setting of one end of brush board 17 changes the roller at the coating, and the outside extension setting of the roller face of other end tangential to roller is changeed in the coating, changes the circular motion direction of roller at the coating, the link of brush board 7 is located the front side of extension end, brush board 17 is provided with elastic construction 18 towards one side of roller is changeed in the coating. When the brush head rotates to one side of the battery material belt, the coating on the brush plate 17 can be coated on the battery material belt through the elastic action, and when the brush head is separated from the battery material belt through continuous rotation, the brush plate 17 resets.
The brush plate 17 elastically deflects relative to the coating rotating roller 13 through the elastic structure 18, the elastic structure 18 comprises an elastic sheet 20, one end of the elastic sheet 20 is connected to the brush plate 17, the other end of the elastic sheet is a free end, the elastic sheet 20 is inclined to a radial line of the coating rotating roller 13, and the free end of the elastic sheet 20 is obliquely arranged towards a connecting end of the brush plate 17. Through shell fragment 20, brush board 17 and the roller surface of coating commentaries on classics roller, can form the triangle-shaped structure, promote brush board 17 elasticity beat and reset and make stability and durability.
Corresponding to the discharge end of battery material area 5 is provided with tiling scraper blade 16, tiling scraper blade 16 is corresponding to the coating face in battery material area, and the coating face in battery material area is up, and the scraper blade is the plate body structure of setting in the coating face top, and battery material area 5 below is provided with fixed supporting platform corresponding to the scraper blade, the one end clearance of tiling scraper blade 16 sets up in the coating face in battery material area 5, and the clearance of scraper blade to battery material area upper surface is greater than 40 mu m for the thickness of injecing the coating also is used for scraping the coating on the battery material area.
The functional material is paraffin, but because paraffin layer is very thin, and the paraffin layer after the spraying appears irregular surface because paraffin solidifies the back, consequently need carry out the plastic to the coating, simultaneously because the thickness of paraffin coating is very little, is about 40 mu m, consequently need carry out the truing to the coating, guarantees that its thickness is even.
As shown in fig. 3-4 and fig. 7, the shaping device 2 includes a surface melting module 22, a shaping plate 23, a curing module 24, and a cutting device 25, the surface melting module 22, the shaping plate 23, the curing module 24, and the cutting module 25 are sequentially disposed above the supporting platform 21 in the displacement direction of the battery belt body 5, the surface melting module 22 is disposed to heat a coating layer on the supporting platform, the shaping plate 23 lays the melted coating layer flat, the curing module 24 is disposed to cool the supporting platform, and the cutting module 25 cuts the upper surface of the solidified coating layer.
Melt the upper surface of the coating of module 22 to battery pole piece 5 through the surface and melt, carry out the plastic to the paraffin that the upper surface melted through shaping plate 23, then rethread solidification module 24 makes the paraffin layer solidification of upper epidermis to the upper surface after making paraffin solidify levels, then cuts paraffin layer upper surface through cutting module 25 again, thereby reaches predetermined thickness value, and the surface levels and unifies completely. The surface melting module 22 is a heating module, such as a hot air blower or a heating resistor, and the solidifying module 24 is a cooling module, such as an air cooler or a refrigerating module.
The rectifying plate 23 is vertically arranged above the supporting platform 21 in a clearance mode, the distance value between the rectifying plate 23 and the upper surface of the battery pole piece 5 is larger than the thickness of a coating layer after cutting and smaller than the thickness of a coating layer in an initial state, the thickness of the coating layer on the battery pole piece to be shaped is larger than a preset thickness, and when the coating layer on the upper surface layer after being melted passes through the rectifying plate, the coating layer can be uniformly coated.
The cutting module 25 comprises a lifting mechanism 27 and a scraper 28 arranged on the lifting mechanism 27, and the scraper 28 adjusts the distance from the cutting edge to the battery pole piece 5 through the lifting mechanism 27; the scraper 28 is a T-shaped plate structure; and the battery pole piece 5 in the displacement state is conveyed to cut the upper surface of the coating layer through a scraper, so that a paraffin coating with a preset thickness is achieved. An air blowing module 32 and a scrap collecting box 33 which are correspondingly arranged on the airflow path of the air blowing module 32 are arranged corresponding to the scraper 28, and the airflow direction of the air blowing module 32 is the same as the length direction of the scraper; the air blowing module 32 is an exhaust fan, the air blowing module and the scrap collecting box are respectively positioned on two sides of the battery electrode in the width direction, and the air blowing module blows the paraffin flying scraps scraped away by cutting into the scrap collecting box.
As shown in fig. 8, a chip cleaning cross bar 34 is arranged above the supporting platform 21 at a distance, and the chip cleaning cross bar 34 is attached to one side of the scraper 28 where the cutting edge is located; the scraper is through the residue on the clearance cutting edge of clear bits horizontal pole 34 at the lift in-process, and the paraffin bits that are cleared up enter into collection bits through the air-blowing module inwards, can guarantee the clean and tidy of coating layer surface, guarantees cutting accuracy.
The support platform 21 is provided with a plurality of groups of pressing rollers 29 in the length direction, the battery pole piece 5 is elastically pressed on the support platform through the pressing rollers 29, and the battery pole piece can be ensured to be flat and stably attached to the support platform through the pressing rollers 29.
As shown in fig. 3-4 and fig. 9, the functional material gasification recovery device 3 includes a heating box 41, a gas collection container 42, a condensation container 43 and an air inlet pipe 45, during heating, the roll core body with the functional layer material is placed in the heating box 41, baking is carried out at 90-130 ℃, the vacuum is carried out until the pressure is below-0.0995 Mpa, the baking time is 7-8h, and at this time, the functional layer material paraffin can be completely gasified or sublimated and is completely extracted from the roll core body.
The inner cavity of the gas collecting container 42 is communicated with the inner cavity of the condensing container 43 through an air inlet pipe 45, the condensing container 43 comprises a condensing outer cylinder 51 and condensing sheets 52 arranged in the inner cavity of the condensing outer cylinder 51, the condensing sheets 52 are arranged in an array manner in the circumferential direction of the condensing outer cylinder 51, and one ends of the condensing sheets facing the center of the cooling outer cylinder are spaced at the center of the cylinder; the condensation chambers 50 are formed between every two adjacent condensation sheets, the condensation chambers 50 are communicated, the condensation contact surface can be enlarged through the condensation sheets 52, and the paraffin condensation speed is accelerated.
The condensation outer cylinder is coaxially provided with a movable rod 47 in a lifting mode, the bottom end of the movable rod is provided with a scraper 48 corresponding to each condensation cavity 50, the shape of the scraper 48 is matched with the shape of the cross section of each condensation cavity, and the scraper 48 is arranged on the wall of each condensation cavity in a clearance mode; and the solidified substance on the wall of the condensation cavity falls off downwards through the scraper. The condensation urceolus outside is provided with telescopic machanism 46, the movable rod sets up at telescopic machanism in the one end that deviates from the scraper blade, the activity carries out reciprocating displacement for the condensation urceolus to make scraper blade 48 and condensation chamber carry out relative displacement, scrape off the paraffin that drops the solidification.
The gas collecting device further comprises a return pipe 53, two ends of the return pipe 53 are respectively communicated with the gas collecting container 42 and the condensing container 43, a part of gas which enters the condensing cylinder and is not condensed can enter the gas collecting container 42 through the condensing pipe, and the gas in the gas collecting container 42 is properly cooled and neutralized, so that the condensing speed of the gas substance in the condensing cylinder can be accelerated.
The movable rod 47 is a hollow rod structure, one end of the movable rod 47 is communicated with the condensation cylinder, the other end of the movable rod is communicated with the air outlet end of the air inlet pipe 45, and the air inlet pipe is of a hose structure.
The following include two specific manufacturing process steps and data statistics:
example 1:
1) making a soft-packed coiled lithium ion battery with a thickness, width, length, 11.6, 100, 305mm and a capacity of 50 Ah: the anode is a ternary material and the cathode is graphite.
2) Firstly, finishing the batching, coating and rolling of positive and negative pole pieces according to a normal process, wherein the pole pieces are coil materials; the thickness of the positive plate is 130um, the thickness of the negative plate is 134um, and the thickness of the diaphragm is 16+4 um; pre-baking the diaphragm coil material for 12-24h at 80-90 ℃;
3) heating functional layer material paraffin (the number of carbon atoms is 28 or 30) to the melting temperature of 70 ℃, and placing the paraffin in an extrusion coating device in a molten state;
4) coating the functional layer material on the single surface of the positive plate in an extrusion coating mode; the thickness of the functional layer is calculated according to the expansion rate of the positive and negative pole pieces, and the coefficient of the thickness of the functional layer is 33um x the total expansion of the positive and negative pole single layers is 1.2 um x 40 um; the thickness of the coated positive plate is 170 um;
5) preparing the coated positive plate and the coated negative plate into a sheet and winding according to a normal process to prepare a roll core body;
6) after winding, placing the winding core body with the functional layer material in an oven, baking at 90 ℃, vacuumizing to below-0.0995 Mpa, and baking for 7-8h, wherein the functional layer material paraffin can be completely gasified or sublimated and is completely extracted from the winding core body, so that the winding core body with sufficient expansion space is prepared; the interior of the roll core body has no stress, and the extracted functional layer material paraffin can be cooled and recovered for recycling;
6) and (5) continuously packaging, baking, forming and grading the roll core body obtained in the step (5) according to a normal process to obtain the 50Ah lithium ion battery.
Example 2: the difference from the embodiment 1 is that the coating layer is on the negative pole piece of the battery, and other steps are consistent.
Comparative example 1:
1) making a soft-packed coiled lithium ion battery with a thickness, width, length, 11.6, 100, 305mm and a capacity of 50 Ah: the anode is a ternary material and the cathode is graphite.
2) Firstly, finishing the batching, coating and rolling of positive and negative pole pieces according to a normal process, wherein the pole pieces are coil materials; the thickness of the positive plate is 130um, the thickness of the negative plate is 134um, and the thickness of the diaphragm is 16+4 um; pre-baking the diaphragm coil material for 12-24h at 80-90 ℃;
3) preparing the positive plate and the negative plate into sheets according to a normal process, and winding to prepare a roll core body;
4) continuously packaging, baking, forming and grading the coiled core body obtained in the step 2 according to a normal process to obtain the 50Ah lithium ion battery;
data:
the above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A manufacturing process of zero deformation of a winding type battery is characterized in that: the method comprises the following steps:
s10: heating the functional layer material to a melting temperature and forming a molten state;
s20: putting the banded battery band body into a conveying system for conveying, and coating the functional material in a molten state on the battery band body while conveying;
s30: the coating thickness of the functional layer is calculated according to the expansion rate of the coated battery pole piece, and the standard functional layer thickness is (the total expansion rate of the anode and the cathode in the manufacturing and circulating processes) 1.0-1.5;
s40: the coated battery pole piece is subjected to sheet making and winding in sequence to obtain a winding core body;
s50: after winding, placing the roll core body with the functional layer material in an oven, baking at the temperature of 60-130 ℃, vacuumizing, gasifying or sublimating the functional layer material, and completely extracting the functional layer material from the roll core body to obtain the roll core body with sufficient expansion space;
s60: cooling and recovering the extracted functional layer material for recycling;
s70: and (5) continuously carrying out process packaging, baking, formation and capacity grading on the roll core body in the step S50 to obtain the finished product of the ion battery.
2. A winding type battery zero-deformation manufacturing process according to claim 1, characterized in that: in step S20, the thickness of the coating layer applied initially is larger than the thickness of the final standard functional layer, and then the coating layer is shaped so that the thickness of the coating layer is uniform and reaches the thickness of the standard functional layer.
3. A winding type battery zero-deformation manufacturing process according to claim 2, characterized in that: the functional layer shaping comprises the following steps:
s21: the coated battery strip body is continuously conveyed, the upper surface of the coating layer is heated, and only the upper surface layer of the coating layer is in a molten state;
s22: the functional material in a molten state is scraped, the male die is uniform, and the thickness of the coating is reduced;
s23: conveying the battery strip body in the step S22 to a cooling area for cooling, so that the functional material coating is solidified and hardened;
s24: and the battery band body in the step S23 is conveyed continuously, and the upper surface layer of the coating is cut, so that the thickness of the coating reaches the thickness of the standard functional layer.
4. A process for zero deformation of a rolled battery as claimed in any one of claims 1 to 4, wherein: the functional material is paraffin.
5. A production line system for implementing a zero-deformation manufacturing process of a rolled battery as claimed in any one of claims 1 to 3, wherein: including coating device (1), shaping device (2) and the gasification recovery unit of functional material (3) that set gradually on battery material area direction of transfer, coating device (1) is to the side intermittent type nature coating functional material in battery material area, and forms a plurality of banding coating strips that are the interval and set up, shaping device (2) carry out the plastic and reach standard functional material thickness to a plurality of banding coating strips, gasification recovery unit of functional material (3) heats gasification and retrieve to the banding coating.
6. The production line system for the zero-deformation manufacturing process of the wound battery according to claim 5, characterized in that: coating device (1) including adjacent and parallel arrangement's material area around roller (12) and coating change roller (13), the one end in battery material area (5) is passed the material area around roller (12) and coating change between roller (13) and around establishing the material area is around on roller (12), it changes at least a set of brush head (15) of coating to be provided with on the circumferencial direction of roller (13) to coat, brush head (15) including brush board (17) of coating, brush board (17) elasticity sets up on roller (13) is changeed in coating, the below interval of roller (13) is changeed in coating is provided with scribbles workbin (14), brush board (17) intermittent type nature contact is in the battery material area under the transport state.
7. The production line system for the zero-deformation manufacturing process of the wound battery according to claim 6, characterized in that: the plate body structure that brush board (17) set up for changeing roller length direction along the coating, the one end of brush board (17) is articulated to be set up on the roller is changeed in the coating, and the other end tangential outwards extends the setting in the roller face of roller is changeed in the coating, changes the circular motion direction of roller in the coating, the link of brush board (7) is located the front side of extension end, brush board (17) are provided with elastic construction (18) towards one side of roller is changeed in the coating.
8. The production line system for the zero-deformation manufacturing process of the wound battery according to claim 5, characterized in that: shaping device (2) melt module (22), shaping plate (23) and solidification module (24) and cutting device (25) including the surface, the surface melts module (22), shaping plate (23), solidification module (24) and cutting module (25) and sets gradually in the top of supporting platform (21) on the displacement direction of battery area body (5), the surface melts module (22) and heats the setting towards the coating on supporting platform, shaping plate (23) tile the coating after melting, solidification module (24) set up towards the cooling of supporting platform, cutting module (25) cuts the coating upper surface after solidifying.
9. The production line system for the zero-deformation manufacturing process of the wound battery according to claim 8, characterized in that: the cutting module (25) comprises a lifting mechanism (27) and a scraper (28) arranged on the lifting mechanism (27), and the scraper (28) adjusts the distance from the cutting edge to the battery pole piece (5) through the lifting mechanism (27); an air blowing module (32) and a scrap collecting box (33) are arranged on the air flow path of the air blowing module (32) correspondingly to the scraper (28), and the air flow direction of the air blowing module (32) is the same as the length direction of the scraper; chip cleaning cross rods (34) are arranged above the supporting platform (21) at intervals, and the chip cleaning cross rods (34) are attached to one side of the scraper (28) where the cutting edge is located; the scraper cleans residues on the blade edge through a scrap cleaning cross bar (34) in the lifting process.
10. The production line system for the zero-deformation manufacturing process of the wound battery according to claim 5, characterized in that: the functional material gasification and recovery device (3) comprises a heating box (41), a gas collection container (42), a condensation container (43) and an air inlet pipe (45), wherein the inner cavity of the gas collection container (42) is communicated with the inner cavity of the condensation container (43) through the air inlet pipe (45), the condensation container (43) comprises a condensation outer cylinder (51) and condensation sheets (52) arranged in the inner cavity of the condensation outer cylinder (51), a plurality of condensation sheets (52) are arranged in an array mode in the circumferential direction of the condensation outer cylinder (51), a condensation cavity (50) is formed between every two adjacent condensation sheets, a movable rod (47) is coaxially arranged in the condensation outer cylinder in a lifting mode, and a scraper (48) is arranged at the bottom end of the movable rod corresponding to each condensation cavity (50); and the solidified substance on the wall of the condensation cavity falls off downwards through the scraper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365519.4A CN114824505B (en) | 2022-04-06 | 2022-04-06 | Manufacturing process of zero deformation of winding type battery and production line system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365519.4A CN114824505B (en) | 2022-04-06 | 2022-04-06 | Manufacturing process of zero deformation of winding type battery and production line system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114824505A true CN114824505A (en) | 2022-07-29 |
| CN114824505B CN114824505B (en) | 2023-11-03 |
Family
ID=82535236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210365519.4A Active CN114824505B (en) | 2022-04-06 | 2022-04-06 | Manufacturing process of zero deformation of winding type battery and production line system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114824505B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023202370B3 (en) | 2023-03-16 | 2024-05-29 | Volkswagen Aktiengesellschaft | Process for producing a solid-state battery cell |
| WO2024120492A1 (en) * | 2022-12-08 | 2024-06-13 | 湖北亿纬动力有限公司 | Winding-type positive electrode sheet and preparation method therefor, and winding core |
| CN119518123A (en) * | 2025-01-16 | 2025-02-25 | 宁德时代新能源科技股份有限公司 | Battery monomer production method, battery monomer, battery and electricity utilization device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012911A1 (en) * | 2001-07-31 | 2003-02-13 | Toray Engineering Co., Ltd. | Manufacturing method for secondary battery and manufacturing apparatus for secondary battery |
| CN102145327A (en) * | 2010-02-04 | 2011-08-10 | 三星Sdi株式会社 | Apparatus and method for coating functional layer |
| JP2013196927A (en) * | 2012-03-21 | 2013-09-30 | Toppan Printing Co Ltd | Manufacturing method of electrode for lithium ion secondary battery and lithium ion secondary battery |
| CN104139592A (en) * | 2014-07-16 | 2014-11-12 | 安徽国风塑业股份有限公司 | BOPP pre-coated basement membrane without primer coatings and preparation method thereof |
| CN106848325A (en) * | 2017-02-15 | 2017-06-13 | 宁德时代新能源科技股份有限公司 | Secondary battery pole piece, preparation method thereof and winding type battery cell |
| CN208485596U (en) * | 2018-06-26 | 2019-02-12 | 珠海恩捷新材料科技有限公司 | A kind of lithium battery diaphragm coating feeding device |
| JP2020072019A (en) * | 2018-10-31 | 2020-05-07 | トヨタ自動車株式会社 | Manufacturing method of stacked cell |
| CN111668491A (en) * | 2020-05-28 | 2020-09-15 | 江苏卓高新材料科技有限公司 | A current collector, pole piece and secondary battery having the same |
| CN113206223A (en) * | 2021-05-08 | 2021-08-03 | 江西安驰新能源科技有限公司 | Lithium battery pole piece processing method and lithium battery preparation method |
| CN113300002A (en) * | 2021-05-28 | 2021-08-24 | 隆能科技(南通)有限公司 | Zero-deformation winding type lithium ion battery |
| CN113996485A (en) * | 2021-10-29 | 2022-02-01 | 芜湖徽氏新材料科技有限公司 | Solvent-resistant protective film for lithium ion battery, coating equipment and coating method thereof |
| CN114284649A (en) * | 2021-12-03 | 2022-04-05 | 江苏海基新能源股份有限公司 | Winding type cylindrical lithium ion battery and production process thereof |
-
2022
- 2022-04-06 CN CN202210365519.4A patent/CN114824505B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012911A1 (en) * | 2001-07-31 | 2003-02-13 | Toray Engineering Co., Ltd. | Manufacturing method for secondary battery and manufacturing apparatus for secondary battery |
| CN102145327A (en) * | 2010-02-04 | 2011-08-10 | 三星Sdi株式会社 | Apparatus and method for coating functional layer |
| JP2013196927A (en) * | 2012-03-21 | 2013-09-30 | Toppan Printing Co Ltd | Manufacturing method of electrode for lithium ion secondary battery and lithium ion secondary battery |
| CN104139592A (en) * | 2014-07-16 | 2014-11-12 | 安徽国风塑业股份有限公司 | BOPP pre-coated basement membrane without primer coatings and preparation method thereof |
| CN106848325A (en) * | 2017-02-15 | 2017-06-13 | 宁德时代新能源科技股份有限公司 | Secondary battery pole piece, preparation method thereof and winding type battery cell |
| CN208485596U (en) * | 2018-06-26 | 2019-02-12 | 珠海恩捷新材料科技有限公司 | A kind of lithium battery diaphragm coating feeding device |
| JP2020072019A (en) * | 2018-10-31 | 2020-05-07 | トヨタ自動車株式会社 | Manufacturing method of stacked cell |
| CN111668491A (en) * | 2020-05-28 | 2020-09-15 | 江苏卓高新材料科技有限公司 | A current collector, pole piece and secondary battery having the same |
| CN113206223A (en) * | 2021-05-08 | 2021-08-03 | 江西安驰新能源科技有限公司 | Lithium battery pole piece processing method and lithium battery preparation method |
| CN113300002A (en) * | 2021-05-28 | 2021-08-24 | 隆能科技(南通)有限公司 | Zero-deformation winding type lithium ion battery |
| CN113996485A (en) * | 2021-10-29 | 2022-02-01 | 芜湖徽氏新材料科技有限公司 | Solvent-resistant protective film for lithium ion battery, coating equipment and coating method thereof |
| CN114284649A (en) * | 2021-12-03 | 2022-04-05 | 江苏海基新能源股份有限公司 | Winding type cylindrical lithium ion battery and production process thereof |
Non-Patent Citations (2)
| Title |
|---|
| 戴增实: "卷绕式铅酸蓄电池的智能制造分析", 《电池工业》, vol. 21, no. 6, pages 34 - 37 * |
| 高学友;陈俊;李洁;: "卷绕式方形软包锂离子电池变形分析与对策研究", 新材料产业, no. 12, pages 31 - 34 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024120492A1 (en) * | 2022-12-08 | 2024-06-13 | 湖北亿纬动力有限公司 | Winding-type positive electrode sheet and preparation method therefor, and winding core |
| DE102023202370B3 (en) | 2023-03-16 | 2024-05-29 | Volkswagen Aktiengesellschaft | Process for producing a solid-state battery cell |
| CN119518123A (en) * | 2025-01-16 | 2025-02-25 | 宁德时代新能源科技股份有限公司 | Battery monomer production method, battery monomer, battery and electricity utilization device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114824505B (en) | 2023-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114824505A (en) | Manufacturing process and production line system for zero deformation of winding type battery | |
| US5948566A (en) | Method for making lead-acid grids and cells and batteries using such grids | |
| CN111660015A (en) | Laser die cutting method for pole piece | |
| US20010012503A1 (en) | Method and apparatus for the continuous production of silicon oxide powder | |
| KR102467973B1 (en) | System for drying separation film of lithium secondary battery | |
| US3621543A (en) | Method of fabricating battery plate grids | |
| US7007579B2 (en) | Paper elimination in the production of battery plates | |
| JP3851195B2 (en) | Battery electrode manufacturing drying apparatus and battery electrode manufacturing method | |
| CN111668432B (en) | Lithium ion battery coating diaphragm and processing technology thereof | |
| EP3146577B1 (en) | Battery grid, battery cell comprising the battery grids and storage battery comprising the battery cells | |
| CN111998613A (en) | Laser cutting and baking integrated device | |
| CN114107889A (en) | Metal foil demoulding method | |
| US12138681B2 (en) | Continuous casting machine and method for bipolar battery foils and battery grids | |
| CN210886316U (en) | Polysilicon ingot casting thermal field heat insulation cage | |
| CN111807690B (en) | Preparation method of photovoltaic glass | |
| CN210234175U (en) | Cool frame for placing plastic woven bags | |
| CN217588982U (en) | Battery sheet surface coating shaping device | |
| CN110293376A (en) | Blade of farm machine automatization processing method | |
| CN113300002A (en) | Zero-deformation winding type lithium ion battery | |
| JPH0145711B2 (en) | ||
| CN206475357U (en) | Casting films process units | |
| CN111628142A (en) | Manufacturing method of lithium ion battery pole piece | |
| CN109468657A (en) | Preparation method of anode plate for electrolyzing manganese dioxide | |
| WO2014105720A1 (en) | Apparatus, methods, and systems for recovering heat from a metal casting process | |
| CN219583372U (en) | Liquid removing device and casting piece equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 215000 333 Fumin Middle Road, Tangqiao town, Zhangjiagang City, Suzhou City, Jiangsu Province Applicant after: Suzhou times Huajing new energy Co.,Ltd. Address before: 215000 No. 333 Fumin Road, Tangqiao town, Zhangjiagang City, Suzhou City, Jiangsu Province Applicant before: Suzhou times Huajing new energy Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |