CN112138961B - Method for producing multi-roll coated composite metal strip - Google Patents
Method for producing multi-roll coated composite metal strip Download PDFInfo
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- CN112138961B CN112138961B CN201910559692.6A CN201910559692A CN112138961B CN 112138961 B CN112138961 B CN 112138961B CN 201910559692 A CN201910559692 A CN 201910559692A CN 112138961 B CN112138961 B CN 112138961B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
- B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
- B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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Abstract
The invention discloses a production method of a multi-roll coating composite metal strip, which comprises a coating process, wherein a multi-roll coating mechanism is used for coating a molten metal material on a strip; in the coating process, the roll gap width between a feed roll and a transfer roll of the multi-roll coating mechanism is adjusted to a set range, and molten metal materials are continuously added between the feed roll and the transfer roll and are kept in a molten state; simultaneously driving the feeding roller and the transfer roller to rotate according to the set rotating speed, so that the molten metal material is uniformly adhered to the transfer roller; uniformly transferring the molten metal material adhered to the transfer roll to a coating roll, and enabling the mass of the molten metal material adhered to the coating roll per unit area to reach a set range; the molten metal material adhered to the coating roll is coated on the strip guided by the coating roll to obtain a composite metal strip having a metal material layer combined on the side surface of the strip.
Description
Technical Field
The invention relates to a production method of a composite metal belt, in particular to a production method of a multi-roll coating composite metal belt.
Background
Since metallic lithium has a high capacity (theoretical 3860mAh/g), a low density (0.59g/cm3), and a low electrochemical potential (-3.04vvs. standard hydrogen electrode), a metallic lithium secondary battery using metallic lithium as a negative electrode has superior performance in that it has a high voltage, a high energy density, and a high energy density, as compared with a lithium ion battery using a graphite negative electrode.
The existing composite lithium belt generally adopts a processing mode of rolling and forming a metal lithium belt and a base material. The metal lithium belt is generally produced by an extrusion molding process, for example, a metal lithium belt production device disclosed in chinese patent publication No. CN204564801U and a metal lithium belt processing method disclosed in chinese patent publication No. CN101497088B, all of which adopt an extrusion molding method. The composite lithium belt produced by the existing extrusion forming process has the defect of thicker thickness. When a thicker metal lithium belt is applied to the metal lithium battery, the capacity of the negative electrode is far more than that of the positive electrode, so that the waste of the metal lithium of the negative electrode is caused, the volume and the weight of the battery are increased, the volume and the mass energy density of the battery are reduced, and the promotion of the limit energy density of the metal lithium battery is not facilitated.
The chinese patent with publication number CN206992217U discloses a production device of composite lithium belt, which is equipped with a frame, wherein the frame is provided with an upper roller and a lower roller, the upstream of the rollers is provided with a current collector unwinding device, a lithium belt unwinding device and a protection film unwinding device, the downstream of the protection film unwinding device is provided with an unwinding guide roller, the downstream of the rollers is provided with a composite lithium belt winding device and a protection film winding device corresponding to the protection film unwinding device, and the upstream of the protection film winding device is provided with a winding guide roller. This apparatus for producing in compound lithium area adopts roll-in shaping's mode to be in the same place mass flow body and the compounding of metal lithium area, because metal lithium area itself thickness is thicker, in addition only rely on simple roll-in to combine together between metal lithium area and the mass flow body, have the problem that the cohesion is not enough.
Of course, some technical solutions for processing the composite lithium ribbon in a non-roll forming manner exist in the prior art. For example, chinese patent publication No. CN109360934A discloses a method for preparing an ultra-thin composite lithium tape, which comprises heating a lithium ingot to a molten state in an atmosphere of high purity argon, immersing a roughened conductive substrate into liquid lithium to form a slurry, slowly pulling out the slurry, adjusting the thickness of the slurry by a roller, air-cooling, and rolling to obtain a double-sided lithium-coated ultra-thin composite lithium tape with a total thickness of 10 to 50 μm. According to the preparation method of the ultrathin composite lithium belt, the composite lithium belt is produced by immersing the substrate into molten metal lithium for paddle hanging, however, due to the fact that the viscosity of the molten metal lithium is high, the thickness of the paddle hanging on the substrate is greatly different, and the condition that the paddle hanging is not hung possibly exists in some areas of the substrate, due to the action of gravity, the condition that the paddle hanging is carried out on the upper side surface and the lower side surface of the substrate is greatly different, the lower side surface of the substrate is difficult to stably hang the paddle, and the quality of the composite lithium belt prepared by the preparation method of the ultrathin composite lithium belt is unstable.
Disclosure of Invention
In view of the above, the present invention provides a method for producing a multi-roll coated composite metal strip, which can not only meet the requirement of large-scale continuous production of the composite metal strip, but also make the thickness of the metal material layer thinner and the quality more stable.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for producing a multi-roll coated composite metal strip,
comprises a coating step of coating a molten metal material on a strip by a multi-roll coating mechanism;
in the coating process, the roll gap width between a feed roll and a transfer roll of the multi-roll coating mechanism is adjusted to a set range, and molten metal materials are continuously added between the feed roll and the transfer roll and are kept in a molten state; simultaneously driving the feeding roller and the transfer roller to rotate according to the set rotating speed, so that the molten metal material is uniformly adhered to the transfer roller;
uniformly transferring the molten metal material adhered to the transfer roll to a coating roll, and enabling the mass of the molten metal material adhered to the coating roll per unit area to reach a set range;
the molten metal material adhered to the coating roll is coated on the strip guided by the coating roll to obtain a composite metal strip having a metal material layer combined on the side surface of the strip.
Further, a molten metal material in a molten state is directly fed between the feed roll and the transfer roll; or the like, or, alternatively,
a solution tank for containing the molten metal material in a molten state is provided below the feed roller, the feed roller is immersed in the solution tank, the molten metal material is adhered by the feed roller, and the molten metal material is transferred between the feed roller and the transfer roller.
Furthermore, at least two material blocking plates with adjustable intervals and used for limiting the width of a coating area are arranged between the feeding roller and the transfer roller, and a metal material coating area is formed between every two adjacent material blocking plates;
when the metallic material coating regions are provided in at least two, adding a molten metallic material in at least one of the metallic material coating regions;
and when the number of the metallic material coating regions to which the molten metallic material is added is at least two:
adding the same molten metal material into different metal material coating areas, and coating and molding a metal material layer made of the same molten metal material on the strip; or adding different molten metal materials in different metal material coating areas, and coating and forming metal material layers of different molten metal materials on the strip.
Further, the molten metal material is an alloy prepared by one or at least two of metal lithium, metal sodium, metal potassium, metal magnesium, metal calcium, metal zinc and metal aluminum.
Further, the strip material adopts but not limited to a copper strip, an aluminum strip, a steel strip or a strip material compounded by metal materials and non-metal materials.
Further, the molten metal material is doped with a non-metallic material.
Further, the molten metal material is coated on the strip under a set atmosphere environment.
Further, the temperature and the dryness of the area where the multi-roll coating mechanism is located are controlled so that the molten metal material is coated on the strip within a set ambient temperature range and a set dryness range, and the set ambient temperature range can keep the molten metal material in a molten state and keep the molten metal material within a set viscosity range.
Further, at least one intermediate transfer roller is arranged between the transfer roller and the coating roller.
Further, the feed roll, the transfer roll, the coating roll, and all of the intermediate transfer rolls employ heatable heating rolls that heat and keep the molten metal material in a molten state and within a set viscosity range.
Further, before the side surface of the strip is coated with the molten metal material, uniformly spraying a negative electrode material on the side surface of the strip to be coated with the molten metal material; or the like, or, alternatively,
uniformly coating a negative electrode material on the side surface of the strip to be coated with the molten metal material before coating the side surface of the strip with the molten metal material; or the like, or, alternatively,
and adhering a layer of negative electrode material on the strip by adopting a soaking process.
Further, the negative electrode material includes, but is not limited to, a carbon negative electrode material, a silicon oxide and its derivative negative electrode material, a silicon carbon composite material and its derivative, a silicon lithium composite and its derivative negative electrode material, a tin-based negative electrode material, a lithium-containing transition metal nitride negative electrode material, a biomass carbon negative electrode material, an alloy-based negative electrode material, a nanoscale negative electrode material, a metal negative electrode material, a nano oxide material, and a lithium-containing transition metal oxide material.
And further, the method also comprises a cooling process, wherein the metal material layer coated on the strip is rapidly cooled and shaped by using a cooling device, and the cooling device is arranged on the discharge side between the coating roller and the coating pressing roller.
And the finishing process is further included, and the composite metal material belt is sequentially rolled by utilizing at least one group of finishing roller groups, the metal material layer cooled by the cooling process is repaired, and the thickness of the metal material layer reaches the set thickness.
Furthermore, a temperature control drying area is arranged in the finishing process, and all finishing roller groups are positioned in the temperature control drying area; and controlling the temperature and the dryness in the temperature-controlled drying area to keep the metal material layer in a set temperature range favorable for finishing.
Furthermore, temperature control drying subareas capable of independently adjusting temperature and dryness are arranged in the temperature control drying area, and at least one finishing roller group is arranged in each temperature control drying subarea.
And further comprising a trimming procedure, wherein trimming tools respectively positioned at two sides of the metal material layer are used for trimming two sides of the corresponding metal material layer, so that the width value of the metal material layer is within a set range.
Further, the method further comprises a heating and melting process for heating and melting the metal material and then adding the obtained molten metal material into the multi-roll coating mechanism.
The invention has the beneficial effects that:
the production method of the multi-roller coating composite metal belt can control the thickness of the molten metal material adhered on the transfer roller by adjusting the roller gap between the feeding roller and the transfer roller, then further control the thickness of the molten metal material adhered on the coating roller by transferring the molten metal material between the transfer roller and the coating roller, namely control the quality of the molten metal material per unit area on the coating roller to reach a set range, and finally coat the molten metal material on a belt material to obtain the composite metal belt compounded with the composite metal material layer. Compared with the mode of directly rolling and compounding the metal lithium belt and the base material in the prior art, the composite metal belt obtained by the production method of the multi-roller coating composite metal belt has better bonding force, and the metal material layer can be thinner and even can reach below 10 um; compared with the existing mode of producing the composite lithium belt by immersing the base material into molten metal for paddle hanging, the composite lithium belt continuous production equipment provided by the invention has the advantages that the thickness of the metal material layer of the composite metal belt is uniform, the defect that the metal layer is not covered in some areas of the base material is avoided, and the quality is more stable.
In conclusion, the production method of the multi-roll coating composite metal strip can meet the requirement of large-scale continuous production of the composite metal strip, and the metal material layer can be thinner and has more stable quality.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic view of a production apparatus suitable for use in the method of the invention for producing a multi-roll coated composite metal strip;
FIG. 2 is a schematic view of a second construction of a production apparatus suitable for use in the method of producing a multi-roll coated composite metal strip according to the present invention;
FIG. 3 is a schematic view of a third construction of a production apparatus suitable for use in the method of producing a multi-roll coated composite metal strip according to the present invention;
FIG. 4 is a schematic view showing a fourth construction of a production apparatus suitable for use in the method for producing a multi-roll coated composite metal strip of the present invention.
Description of reference numerals:
1-a strip; 2-a composite metal strip; 3-melting the metallic material; 4-a feeding zone;
10-an unwinding mechanism;
20-a multi-roll coating mechanism; 21-a feed roll; 22-a transfer roll; 23-a coating roll; 24-coating press roll; 25-an intermediate transfer roll; 26-a coating control zone; 27-a feeding device;
30-a winding mechanism;
41-a spraying mechanism; 42-a coating mechanism; 43-a guide roll; 44-a soaking tank;
50-a cooling device;
60-a finishing zone; 61-finishing roller group; 62-temperature control drying area; 63-temperature controlled drying zone.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
First, a specific embodiment of a production apparatus suitable for the production method of a multi-roll coated composite metal strip of the present invention will be described.
As shown in fig. 1, the production apparatus for multi-roll coated composite metal strip of the present embodiment includes:
unwinding mechanism 10: the device is used for continuously unreeling the strip;
a multi-roll coating mechanism 20 for coating a metal material layer on the strip 1 and obtaining a composite metal strip 2;
and the winding mechanism 30 is used for winding the composite metal belt 2.
The multi-roll coating mechanism 20 of the present embodiment includes a feed roll 21, a transfer roll 22, a coating roll 23, and a coating nip roll 24. Specifically, the feed roll 21 and the transfer roll 22 are adjacently disposed, and the roll gap between the feed roll 21 and the transfer roll 22 is adjustable, and the feed zone 4 for adding the molten metal material 3 is formed between the feed roll 21 and the transfer roll 22. The coating roll 23 is disposed adjacent to the coating nip roll 24, and the coating roll 23 receives the molten metal material 3 adhered by the transfer roll 22 and coats the molten metal material 3 on the strip 1 guided by the coating nip roll 24.
In addition, in some embodiments, a receiving trough may be further provided below the multi-roll coating mechanism 20 for receiving the molten metal material leaked from the multi-roll coating mechanism 20 for recycling.
Preferably, a roll gap adjusting mechanism for adjusting the roll gap width between the feed roll 21 and the transfer roll 22 is arranged on the rotating shaft of the feed roll in this embodiment, and the roll gap adjusting mechanism can be implemented in various existing manners, which will not be described in detail. By providing the roll gap adjusting mechanism, the roll gap between the feed roll 21 and the transfer roll 22 can be accurately adjusted, thereby controlling the thickness of the molten metal material 3 adhering to the transfer roll 22.
Further, feeding means for feeding the molten metal material 3 to the feeding zone 4 is provided above the feed roll 21 and the transfer roll 22; alternatively, a solution tank for containing the molten metal material is provided below the feed roller 21, and the lower portion of the feed roller 21 is immersed in the solution tank and transfers the adhered molten metal material to the charging zone 4. In this embodiment, a feeding device for feeding the molten metal material 3 into the feeding zone 4 is provided above the feed roll 21 and the transfer roll 22, and the feeding device can be implemented by various existing devices, such as a feeding nozzle, a screw extrusion feeding device, and the like, and will not be described repeatedly.
Further, be equipped with two at least striker plates in the charging area 4, each striker plate all can independently move along the axial direction of transfer roller, and forms metal material coating area between two adjacent striker plates, through setting up the striker plate, can the accurate control at 1 coating molten metal material 3's of strip width, through setting up polylith striker plate, can be on strip 1 subregion coating the same molten metal material or different molten metal material.
Further, at least one intermediate transfer roll 25 is provided between the transfer roll 21 and the coating roll 22. An intermediate transfer roll 25 is provided between the transfer roll 21 and the coating roll 22 in the present embodiment, the number of the intermediate transfer rolls 25 is set according to actual needs, and in the process of transferring the molten metal material among the transfer roll 21, the intermediate transfer roll 25, and the coating roll 22, the coating thickness of the molten metal material 3 is accurately controlled by means of the difference in the rotational speed among the rolls, and the like.
Preferably, in some embodiments, feed roll 21, transfer roll 22, coating roll 23, and all intermediate transfer rolls 25 are heatable heated rolls for heating and maintaining molten metallic material 3 in a molten state and within a set viscosity range. In order to achieve the technical object of adhering the molten metal material 3 to the transfer roll 22, the intermediate transfer roll 25, and the coating roll 23, it is necessary to control the viscosity of the molten metal material 3, and the viscosity of the molten metal material is related to the temperature thereof, and by controlling the temperature, the viscosity of the molten metal material 3 can be controlled to be maintained within a range satisfying the coating requirements.
Further, the multi-roll coated composite metal strip manufacturing apparatus further includes a coating control section 26 for controlling the temperature and the dryness of the area where the multi-roll coating mechanism 20 is located, and controlling the molten metal material 3 to be coated on the strip 1 in a set ambient temperature range and a set dryness range. In the case where some highly reactive metal materials, such as lithium, sodium, potassium, and the like, react by coming into contact with substances such as water molecules present in the air, it is necessary to strictly control the dryness of the coating environment as well as the coating temperature in order to coat such a molten metal material 3. Of course, those skilled in the art will appreciate that the feed roll 21, the transfer roll 22, the coating roll 23, and all of the intermediate transfer rolls 25 may not be provided as heated rolls, provided that the coating control zone 26 is provided, and will not be described again.
Further, in some embodiments, a spraying mechanism 41 for uniformly spraying the negative electrode material on the side of the strip 1 to be coated with the molten metal material is provided between the unwinding mechanism 10 and the multi-roll coating mechanism 20, as shown in fig. 2. In some embodiments, a coating mechanism 42 for coating the negative electrode material on the side of the strip 1 to be coated with the molten metal material is disposed between the unwinding mechanism 10 and the multi-roll coating mechanism 20, as shown in fig. 3. In some embodiments, a soaking tank 44 for containing the anode material after the stirring and dispersing process and a guide roller 43 for guiding the strip 1 into the soaking tank are disposed between the unwinding mechanism 10 and the multi-roller coating mechanism 20, and the anode material layer is adhered to the surface of the strip 1 after passing through the soaking tank 44, as shown in fig. 4. The apparatus for producing a multi-roll coated composite metal strip of the present embodiment is a method of directly coating the molten metal material 3 on the strip material 1, that is, the spray mechanism 41, the coating mechanism 42, the immersion tank 44, and the like may not be provided in the apparatus for producing a multi-roll coated composite metal strip, and the description thereof will not be repeated.
Furthermore, a cooling device 50 for rapidly cooling and shaping the metal material layer is arranged on the discharging side between the coating roller 23 and the coating press roller 24, and the metal material layer coated on the strip material 1 is rapidly cooled and shaped by the cooling device 50, so that the defects of uneven thickness and the like of the metal material layer caused by the flowing of the metal material on the surface of the strip material 1 under the action of gravity and the like under the state that the metal material is kept in a molten state are prevented.
Further, a finishing area 60 is arranged between the multi-roll coating mechanism 20 and the winding mechanism 30, at least one finishing roll group 61 for rolling the composite metal strip 2 to repair the metal material layer cooled by the cooling device 50 and to enable the thickness of the metal material layer to reach a set thickness is arranged in the finishing area 60, and each finishing roll group 61 comprises two corresponding finishing rolls. Specifically, when the finishing roller groups 61 are provided in at least two sets, between the two adjacent sets of finishing roller groups 61, the gap between the rollers of the finishing roller group 61 on the side close to the multi-roller coating mechanism 20 is larger than the gap between the rollers of the finishing roller group 61 on the side close to the winding mechanism 30, that is, the metal material layer of the composite metal strip 2 is pressed to a set thickness by a plurality of finishing roller presses.
Further, a temperature-controlled drying zone 62 for controlling the temperature and dryness thereof and maintaining the metal material layer within a set temperature range favorable for finishing thereof is provided in the finishing zone 60, and all finishing roller groups 61 are located in the temperature-controlled drying zone. Preferably, a temperature control drying subarea 63 capable of independently adjusting the temperature and the dryness is arranged in the temperature control drying area, and at least one finishing roller group 61 is arranged in each temperature control drying subarea.
Further, the production apparatus for a multi-roll coated composite metal strip of the present embodiment further includes an edge-trimming tool for performing an edge-trimming process on both sides of the metal material layer. The trimming tool may be disposed between the finishing section 60 and the winding mechanism 30, or may be disposed on at least one finishing roller set 61, and both sides of the metal material layer may be trimmed by the trimming tool, so that the width of the metal material layer is maintained within a set range.
The following is a description of a specific embodiment of the method for producing a multi-roll coated composite metal strip of the present invention.
The method for producing a multi-roll coated composite metal strip of the present embodiment includes a coating step of coating a molten metal material 3 on a strip 1 by using a multi-roll coating mechanism 20. Specifically, in the coating step, the roll gap width between the feed roll 21 and the transfer roll 22 of the multi-roll coating mechanism 20 is adjusted to a set range, and the molten metal material 3 is continuously fed between the feed roll 21 and the transfer roll 22 and is kept in a molten state; the feed rolls 21 and the transfer rolls 22 are simultaneously driven to rotate at a set rotational speed, so that the molten metal material 3 is uniformly adhered to the transfer rolls 22. The molten metal material 3 adhered to the transfer roll 22 is uniformly transferred to the coating roll 23, and the mass per unit area of the molten metal material adhered to the coating roll 23 is made to reach a set range, that is, the thickness of the molten metal material 3 adhered to the coating roll 23 is controlled, and further, the thickness of the metal material layer coated on the strip 1 is controlled. The molten metal material 3 adhered to the coating roll 23 is coated on the strip 1 guided by the coating roll 24, resulting in a composite metal strip 2 having a metal material layer composited on the side surface of the strip 1.
The method for producing a multi-roll coated composite metal strip of the present embodiment further includes a heating and melting process for heating and melting the metal material, and then feeding the obtained molten metal material into the multi-roll coating mechanism 20, that is, between the feed roll 21 and the transfer roll 22.
Further, the molten metal material 3 in a molten state is directly fed between the feed roll 21 and the transfer roll 22 by a feeding device 27; or a solution tank for containing the molten metallic material 3 in a molten state is provided below the feed roller 21, the feed roller 21 is immersed in the solution tank, the molten metallic material is adhered by the feed roller 21, and the molten metallic material is transferred between the feed roller 21 and the transfer roller 22. The present embodiment employs the feeding device 27 to directly feed the molten metallic material 3 in a molten state between the feed roll 21 and the transfer roll 22.
Further, at least two material baffle plates with adjustable intervals and used for limiting the width of a coating area are arranged between the feeding roller 21 and the transfer roller 22, and a metal material coating area is formed between every two adjacent material baffle plates; through setting up metal material coating area, can the accurate control scribble the width of coating molten metal material 3 on strip 1, through setting up polylith striker plate, can the subregion coat the same molten metal material or different molten metal material on strip 1. Namely: when the number of the metal material coating areas is at least two, adding molten metal material into at least one metal material coating area; when the number of the metallic material coating regions to which the molten metallic material is added is at least two: adding the same molten metal material into different metal material coating areas, and coating and molding a metal material layer made of the same molten metal material on the strip; or, different molten metal materials are added into different metal material coating areas, and metal material layers of different molten metal materials are coated and formed on the strip.
Further, the molten metal material 3 is an alloy including one or at least two of metal lithium, metal sodium, metal potassium, metal magnesium, metal calcium, metal zinc, and metal aluminum. The strip 1 is made of, but not limited to, copper strip, aluminum strip, steel strip or a strip made of a composite of a metal material and a non-metal material. The molten metal material 3 of this embodiment is made of lithium metal, and the strip material 1 is made of, but not limited to, copper strip, that is, the composite metal strip 2 of this embodiment is made of copper-lithium composite strip. The lithium metal has the characteristics of low melting point and adjustable viscosity of molten lithium metal in different temperature ranges, and can be compounded on strips such as copper strips in a coating mode. Similarly, other metals and alloys of at least two metals have similar properties and will not be described again.
Further, in some embodiments, the molten metal material 3 is doped with a non-metal material, such as a carbon material doped with lithium metal, as a battery negative electrode material, which will not be described again.
Further, in some embodiments, the molten metal material 3 is coated on the strip 1 in a set atmosphere environment, and for some metal materials, it may react with some substances in the air, such as metallic lithium and water molecules in the control, and thus atmosphere avoidance is required.
Further, in some embodiments, it is desirable to control the temperature and dryness of the area where the multi-roll coating mechanism 20 is located so that the molten metal material 3 is coated on the strip 1 within a set ambient temperature range and a set dryness range, and the set ambient temperature range allows the molten metal material 3 to remain molten and the molten metal material to remain within a set viscosity range. In the case where some highly reactive metal materials, such as lithium, sodium, potassium, and the like, react by coming into contact with substances such as water molecules present in the air, it is necessary to strictly control the dryness of the coating environment as well as the coating temperature in order to coat such a molten metal material 3.
Further, at least one intermediate transfer roll 25 is provided between the transfer roll 22 and the coating roll 23. In some embodiments, the feed roll 21, the transfer roll 22, the coating roll 23, and all the intermediate transfer rolls 25 employ heatable heating rolls for heating and keeping the molten metal material 3 in a molten state and in a set viscosity range. In order to achieve the technical object of adhering the molten metal material 3 to the transfer roll 22, the intermediate transfer roll 25, and the coating roll 23, it is necessary to control the viscosity of the molten metal material 3, and the viscosity of the molten metal material is related to the temperature thereof, and by controlling the temperature, the viscosity of the molten metal material 3 can be controlled to be maintained within a range satisfying the coating requirements. Of course, those skilled in the art will appreciate that the feed roll 21, the transfer roll 22, the coating roll 23, and all of the intermediate transfer rolls 25 may or may not be provided as heated rolls, provided that the coating control zone 26 is provided, and will not be described again.
Further, in some embodiments, the negative electrode material is uniformly sprayed on the side of the strip 1 to be coated with the molten metal material using the spraying mechanism 41 before the side of the strip 1 is coated with the molten metal material, as shown in fig. 2. In some embodiments, prior to coating the side of the strip with the molten metal material, a coating mechanism 43 is used to uniformly coat the side of the strip to be coated with the molten metal material with the negative electrode material, as shown in fig. 3. In some embodiments, a wetting process is used to adhere a layer of negative electrode material to the strip 1, as shown in fig. 4.
Further, the negative electrode material includes, but is not limited to, carbon negative electrode materials such as artificial graphite, natural graphite, mesocarbon microbeads, petroleum coke, carbon fibers, pyrolytic resin carbon, and the like; silicon oxide and its derivative negative electrode material; silicon carbon composites and derivatives thereof; silicon-lithium composite and derivative negative electrode materials; the tin-based negative electrode material can be divided into tin oxide and tin-based composite oxide, wherein the oxide refers to the oxide of metal tin in various valence states; a lithium-containing transition metal nitride negative electrode material; a biomass carbon negative electrode material; alloy-based negative electrode materials including tin-based alloys, silicon-based alloys, germanium-based alloys, aluminum-based alloys, antimony-based alloys, magnesium-based alloys, and other alloys; nano-grade cathode materials including carbon nanotubes and nano-alloy materials; a metallic anode material including, but not limited to, one or an alloy of at least two of metallic lithium, metallic sodium, and metallic magnesium; the nano oxide material can be prepared by adding nano titanium oxide and nano silicon oxide into conventional cathode materials such as graphite, tin oxide, carbon nanotubes and the like; lithium-containing transition metal oxide materials include, but are not limited to, lithium titanate and its derivatives, lithium iron phosphate, and the like.
Further, the method for producing the multi-roll coated composite metal strip of the embodiment further includes a cooling step, the metal material layer coated on the strip 1 is rapidly cooled and shaped by the cooling device 50, the cooling device 50 is arranged on the discharging side between the coating roll 23 and the coating press roll 24, and after the molten metal material 3 is coated on the strip 1, the strip is immediately cooled and shaped, so that defects such as uneven thickness of the metal material layer and the like caused by flowing of the metal material on the surface of the strip 1 under the action of gravity and the like in a state that the metal material is kept in a molten state are prevented.
Further, the method for producing a multi-roll coated composite metal strip of the present embodiment further includes a finishing process of sequentially rolling the composite metal strip 2 using at least one set of finishing rolls 61, repairing the metal material layer cooled by the cooling process, and making the thickness of the metal material layer to a set thickness. In the embodiment, a temperature control drying area 61 is arranged in the finishing process, and all finishing roller sets are positioned in the temperature control drying area 61; and controlling the temperature and the dryness in the temperature-controlled drying area to keep the metal material layer within a set temperature range favorable for finishing. Preferably, the temperature control drying area is internally provided with temperature control drying subareas 63 capable of independently adjusting the temperature and the dryness respectively, and each temperature control drying subarea is internally provided with at least one finishing roller group 61, so that the composite metal belt 2 can be finished in different temperature environments.
Further, the method for producing the multi-roll coated composite metal strip of the embodiment further includes a trimming step of trimming both sides of the corresponding metal material layer by using trimming tools respectively located at both sides of the metal material layer, so that the width value of the metal material layer is within a set range. The trimming tool may be disposed between the finishing section 60 and the winding mechanism 30, or may be disposed on at least one finishing roller set 61, and both sides of the metal material layer may be trimmed by the trimming tool, so that the width of the metal material layer is maintained within a set range.
According to the production method of the multi-roll coated composite metal strip, the thickness of the molten metal material adhered to the transfer roll can be quantified by adjusting the roll gap between the feeding roll and the transfer roll, then the thickness of the molten metal material adhered to the coating roll is further controlled by transferring the molten metal material between the transfer roll and the coating roll, namely the mass of the molten metal material per unit area on the coating roll is controlled to reach a set range, and finally the molten metal material is coated on the strip, so that the composite metal strip compounded with the composite metal material layer is obtained. Compared with the mode of directly rolling and compounding the metal lithium belt and the base material in the prior art, the composite metal belt obtained by the production method of the multi-roller coating composite metal belt has better bonding force, and the metal material layer can be thinner and even can reach below 10 um; compared with the existing mode of producing the composite lithium belt by immersing the base material into molten metal for paddle hanging, the composite lithium belt continuous production equipment provided by the invention has the advantages that the thickness of the metal material layer of the composite metal belt is uniform, the defect that the metal layer is not covered in some areas of the base material is avoided, and the quality is more stable. In conclusion, the production method of the multi-roll coating composite metal strip in the embodiment can meet the requirement of large-scale continuous production of the composite metal strip, and the metal material layer can be thinner and has more stable quality.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (16)
1. A method for producing a multi-roll coated composite metal strip, characterized in that:
comprises a coating step of coating a molten metal material on a strip by a multi-roll coating mechanism;
in the coating process, the roll gap width between a feed roll and a transfer roll of the multi-roll coating mechanism is adjusted to a set range, and molten metal materials are continuously added between the feed roll and the transfer roll and are kept in a molten state; simultaneously driving the feeding roller and the transfer roller to rotate according to the set rotating speed, so that the molten metal material is uniformly adhered to the transfer roller;
uniformly transferring the molten metal material adhered to the transfer roll to a coating roll, and enabling the mass of the molten metal material adhered to the coating roll per unit area to reach a set range;
coating the molten metal material adhered to the coating roll on the strip guided by the coating press roll to obtain a composite metal strip with a metal material layer compounded on the side surface of the strip;
the cooling process is that the metal material layer coated on the strip is rapidly cooled and shaped by a cooling device, and the cooling device is arranged on the discharge side between the coating roller and the coating compression roller;
the multi-roll coating mechanism further comprises a heating and melting process, wherein the heating and melting process is used for heating and melting the metal material, and then adding the obtained molten metal material into the multi-roll coating mechanism.
2. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
directly feeding molten metal material in a molten state between the feed roll and the transfer roll; or the like, or, alternatively,
a solution tank for containing the molten metal material in a molten state is provided below the feed roller, the feed roller is immersed in the solution tank, the molten metal material is adhered by the feed roller, and the molten metal material is transferred between the feed roller and the transfer roller.
3. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
at least two material blocking plates with adjustable intervals and used for limiting the width of a coating area are arranged between the feeding roller and the transfer roller, and a metal material coating area is formed between every two adjacent material blocking plates;
when the metallic material coating regions are provided in at least two, adding a molten metallic material in at least one of the metallic material coating regions;
and when the number of the metallic material coating regions to which the molten metallic material is added is at least two:
adding the same molten metal material into different metal material coating areas, and coating and molding a metal material layer made of the same molten metal material on the strip; or adding different molten metal materials in different metal material coating areas, and coating and forming metal material layers of different molten metal materials on the strip.
4. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
the molten metal material is an alloy prepared from one or at least two of metal lithium, metal sodium, metal potassium, metal magnesium, metal calcium, metal zinc and metal aluminum.
5. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
the strip material adopts a copper strip, an aluminum strip or a steel strip.
6. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
the molten metal material is doped with a non-metallic material.
7. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
the molten metal material is coated on the strip in a set atmosphere environment.
8. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
controlling the temperature and the dryness of the area where the multi-roll coating mechanism is located, so that the molten metal material is coated on the strip material within a set environment temperature range and a set dryness range, and the set environment temperature range can keep the molten metal material in a molten state and keep the molten metal material within a set viscosity range.
9. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
at least one intermediate transfer roller is arranged between the transfer roller and the coating roller.
10. The method of producing multi-roll coated composite metal strip according to claim 9, characterized in that:
the feed roll, the transfer roll, the coating roll, and the intermediate transfer roll each employ heatable heating rolls that heat and maintain the molten metal material in a molten state and within a set viscosity range.
11. The method of producing multi-roll coated composite metal strip according to any one of claims 1 to 10, characterized in that:
and before the side surface of the strip is coated with the molten metal material, uniformly coating the side surface of the strip to be coated with the molten metal material with a negative electrode material.
12. The method of producing multi-roll coated composite metal strip according to claim 11, characterized in that:
the negative electrode material comprises a carbon negative electrode material, a silicon oxide and derivative negative electrode material thereof, a silicon-carbon composite material and derivative thereof, a silicon-lithium composite and derivative negative electrode material, a tin-based negative electrode material, a lithium-containing transition metal nitride negative electrode material, a biomass carbon negative electrode material, an alloy negative electrode material, a nanoscale negative electrode material, a metal negative electrode material, a nano oxide material and a lithium-containing transition metal oxide material.
13. The method of producing multi-roll coated composite metal strip according to claim 1, characterized in that:
and the finishing process is also included, at least one group of finishing roller groups are utilized to roll the composite metal material belt in sequence, the metal material layer cooled by the cooling process is repaired, and the thickness of the metal material layer reaches the set thickness.
14. The method of producing multi-roll coated composite metal strip according to claim 13, characterized in that:
a temperature control drying area is arranged in the finishing process, and all finishing roller groups are positioned in the temperature control drying area; and controlling the temperature and the dryness in the temperature-controlled drying area to keep the metal material layer in a set temperature range favorable for finishing.
15. The method of producing multi-roll coated composite metal strip according to claim 14, characterized in that:
the temperature control drying area is internally provided with temperature control drying subareas which can respectively and independently adjust the temperature and the dryness, and each temperature control drying subarea is internally provided with at least one group of finishing roller sets.
16. The method of producing multi-roll coated composite metal strip according to claim 13, characterized in that:
and the trimming process is that trimming tools respectively positioned at two sides of the metal material layer are used for trimming two sides of the corresponding metal material layer, so that the width value of the metal material layer is within a set range.
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| US5919517A (en) * | 1993-05-05 | 1999-07-06 | Aluminum Company Of America | Method for coating a metal strip |
| CN2587528Y (en) * | 2002-10-19 | 2003-11-26 | 杭州泰欣冷轧薄板有限公司 | Paint film rolling-coating device for steel strip |
| JP5453999B2 (en) * | 2008-08-26 | 2014-03-26 | Ｊｆｅスチール株式会社 | Roll type coater device and method for producing painted metal strip |
| JP6139283B2 (en) * | 2013-06-11 | 2017-05-31 | 株式会社瑞光 | Hot melt adhesive coating apparatus and hot melt adhesive coating method |
| JP6283917B2 (en) * | 2014-09-18 | 2018-02-28 | パナソニックＩｐマネジメント株式会社 | Coating film manufacturing method and coating film manufacturing apparatus |
| CN206661561U (en) * | 2017-01-25 | 2017-11-24 | 江阴宝柏包装有限公司 | A kind of PUR smooth roll transfer coated device |
| CN207265160U (en) * | 2017-09-13 | 2018-04-20 | 中国科学院青岛生物能源与过程研究所 | A kind of device for continuously preparing ultra-thin complex lithium band |
| CN108598372A (en) * | 2018-06-26 | 2018-09-28 | 东莞塔菲尔新能源科技有限公司 | A kind of pole piece mends lithium system and mends lithium method |
| CN208757920U (en) * | 2018-07-26 | 2019-04-19 | 东莞市昌圣硅胶制品有限公司 | A kind of coating transfer device of silica gel pad coating machine |
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