Battery material manufacturing apparatus, battery material manufacturing system, and battery material manufacturing method

Abstract

The battery material manufacturing device (200) comprises a receiving opening (210), an extending part (220), a combining part (230) and a sending-out opening (240). Each of the receiving ports (210) continuously receives a plurality of compositions different from each other in the form of a fluid. The extension unit (220) extends each of the compositions in a direction orthogonal to the delivery direction while guiding the injected composition in the delivery direction. The joining unit (230) joins a plurality of compositions into a layered shape and guides the plurality of compositions in a feed-out direction. The delivery port (240) is a slit-shaped opening and is capable of continuously delivering, as a delivery object, a plurality of types of compositions integrated by stretching and bonding.

Description

Technical Field

[0001] The present invention relates to a battery material manufacturing device, a battery material manufacturing system and a battery material manufacturing method. Background Art

[0002] Recently, as the demand for batteries in various scenes increases, the development of next-generation batteries has been promoted. As one of the next-generation batteries, for example, a technology of replacing the metal of the collector with a resin or a technology of impregnating a predetermined polymer with an electrolyte solution has been proposed.

[0003] For example, Patent Document 1 discloses a resin current collector for lithium ion batteries having a conductive resin layer including a matrix resin, a conductive filler, and a conductive filler dispersant.

[0004] Patent Document 2 discloses a resin collector for a positive electrode in which a conductive filler is dispersed in a matrix resin including a predetermined polymer.

[0005] Patent Document 3 discloses a negative electrode for a lithium ion battery and a method for producing the same, the negative electrode including a current collector and a negative electrode composition layer provided on a surface of the current collector.

[0006] Reference List

[0007] Patent Literature

[0008] [Patent Document 1] Unexamined Japanese Patent Application Publication No. 2021-068587;

[0009] [Patent Document 2] Unexamined Japanese Patent Application Publication No. 2021-118046;

[0010] [Patent Document 3] Unexamined Japanese Patent Application Publication No. 2021-125337. Summary of the invention

[0011] Technical issues

[0012] However, it is difficult to say that the inventions of the above patent documents have established means for mass production of lithium-ion batteries or battery materials.

[0013] The present disclosure is made to solve such problems, and provides a battery material production apparatus and the like that can continuously and efficiently produce battery materials.

[0014] Solution to the problem

[0015] The battery material manufacturing device according to the present disclosure includes: a receiving port, a stretching portion, a combining portion, and a delivery port. The receiving port receives a plurality of compositions that are different from each other in the form of fluids in a continuous manner. The stretching portion guides the injected composition along the delivery direction while stretching each composition in the composition along an orthogonal direction relative to the delivery direction. The combining portion combines the plurality of compositions into layers and guides the plurality of compositions along the delivery direction. The delivery port is a slit-shaped opening that can continuously deliver the plurality of compositions that are integrated by stretching and combining as delivery objects.

[0016] In the battery material manufacturing method according to the present disclosure, the battery material manufacturing device performs the following process. The battery material manufacturing device respectively and continuously receives multiple different compositions required for at least manufacturing battery materials. The battery material manufacturing device guides the injected composition along the delivery direction while stretching each composition in the composition along the orthogonal direction relative to the delivery direction. The battery material manufacturing device combines the multiple compositions into layers and guides the multiple compositions along the delivery direction. The battery material manufacturing device continuously delivers the multiple compositions that are integrated by stretching and combining.

[0017] According to the present disclosure, it is possible to provide a battery material production apparatus and the like that are capable of continuously and efficiently producing battery materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a diagram showing the structure of a battery according to Example 1;

[0019] Figure 2 is an overall configuration diagram of a battery material manufacturing system according to Example 1;

[0020] Figure 3 A first cross-sectional view of an apparatus for manufacturing battery materials;

[0021] Figure 4 a second cross-sectional view of an apparatus for manufacturing battery materials;

[0022] Figure 5 is a cross-sectional view showing a second example of a battery material manufacturing apparatus;

[0023] Figure 6 A diagram for explaining the structure of the degassing unit 500;

[0024] Figure 7 is an overall configuration diagram of a battery material manufacturing system according to Example 2; and

[0025] Figure 8 This is a diagram showing the structure of a battery material manufacturing system according to Example 3. DETAILED DESCRIPTION

[0026] Hereinafter, the present invention will be described using the embodiments of the present invention, but the present invention according to the scope of the claims is not limited to the following embodiments. In addition, not all the components described in the embodiments are necessary means for solving the problem. For the sake of clarity, the following description and drawings are appropriately omitted and simplified. Note that in the drawings, the same elements are given the same reference numerals, and repeated descriptions are omitted as needed.

[0027] <Example 1>

[0028] Hereinafter, a battery material manufacturing system according to Embodiment 1 will be described with reference to the drawings. The battery material manufacturing system according to this embodiment manufactures materials for manufacturing a predetermined battery. The predetermined battery is, for example, a lithium ion battery which is a semi-solid battery type.

[0029] Figure 1 FIG. 1 is a diagram showing the structure of a battery according to Example 1. Figure 1 In the battery P100 shown, a current collector P10, a positive electrode layer P20, a separator P30, a negative electrode layer P40, and a current collector P10 are stacked in this order from the top.

[0030] In the current collector P10, a negative electrode current collector P11, a current collecting substrate P12, and a positive electrode current collector P13 are stacked in this order from the top.

[0031] The main components of the negative electrode collector P11 include a matrix resin and a conductive filler dispersed in the matrix resin. The matrix resin is, for example, PP (polypropylene), PMMA (polymethyl methacrylate) or PVC (polyvinyl chloride). The conductive filler is, for example, a conductive powder material, such as titanium powder, nickel powder, aluminum powder or carbon black. The conductive filler is not limited to the above materials, and may be, for example, a conductive fiber material, such as carbon nanotubes, graphene or metal nanowires. The negative electrode collector P11 may contain a dispersant. The dispersant is not particularly limited to any composition or combination, as long as it is a resin that can form a film or sheet shape. The dispersant may be, for example, a copolymer of PP and PE (polyethylene).

[0032] In the above composition, for the powder material as the conductive filler, it is preferred that, for example, the particle size is 10 microns or more and 500 microns or less, and the mass percentage is 20% or more and 70% or less. The conductive filler can form secondary particles. The secondary particles are aggregated particles formed by agglomeration (clustering) of primary particles of 1 nanometer or more and less than 10 microns. The shape of the secondary particles is not necessarily spherical or a block closer to a spherical shape, and can be beaded or have a forked branch portion.

[0033] In addition, for the fiber material as the conductive filler, for example, it is preferred that the fiber diameter is 1 nm to 500 nm, the fiber length is 1 μm to 500 μm, and the mass percentage is 20% to 70%.

[0034] Note that the particle size can be advantageously measured using a particle size distribution measuring device utilizing diffraction and scattering of laser light. That is, the particle size can be the average of the particle size distribution measured by the particle size distribution measuring device. In addition, the fiber diameter and fiber length can also be measured using the above-mentioned particle size distribution measuring device. In this case, since the particle size distribution pattern obtained by measurement has multiple peaks, the peak on the smaller side can be set as the fiber diameter, and the peak on the larger side can be set as the fiber length.

[0035] The current collecting substrate P12 is provided between the negative electrode current collector P11 and the positive electrode current collector P13. The current collecting substrate P12 includes, for example, PP, a copolymer of PP and PE, carbon black, and graphite.

[0036] The main components of the positive electrode collector P13 include a matrix resin and a conductive filler dispersed in the matrix resin. The matrix resin is, for example, PP. In addition, the conductive filler is, for example, carbon powder and carbon fiber. The carbon powder is not limited to any form as long as it is a powder material with carbon as the main component. That is, the carbon powder can be graphite or carbon black. In addition, the carbon fiber is not limited to any form as long as it is a fiber material with carbon as the main component. In other words, the carbon fiber can be a carbon nanotube or graphene. In addition, the positive electrode collector P13 may contain a dispersant. The dispersant is, for example, a copolymer of PP and PE.

[0037] In the above composition, for the powder material as the conductive filler, it is preferred that, for example, the particle size is 10 microns or more and 500 microns or less, and the mass percentage is 20% or more and 70% or less. The conductive filler can form secondary particles. The secondary particles are aggregated particles formed by agglomeration (clustering) of primary particles of 1 nanometer or more and less than 10 microns. The shape of the secondary particles is not necessarily spherical or a block closer to a spherical shape, and can be beaded or have a forked branch portion.

[0038] In addition, for the fiber material as the conductive filler, it is preferred that, for example, the fiber diameter is 1 nanometer to 500 nanometers, the fiber length is 1 micrometer to 500 micrometers, and the mass percentage is 20% to 70%. In the collector P10 on the positive electrode side, the negative electrode collector P11 is arranged on the opposite side, and the positive electrode collector P13 is in contact with the positive electrode layer P20.

[0039] The positive electrode layer P20 is disposed between the positive electrode current collector P13 and the separator P30. The positive electrode layer P20 includes a gel-like polymer compound, a positive electrode active material, and a conductive filler. The gel-like polymer compound may be a conductive resin.

[0040] The separator P30 is provided between the positive electrode layer P20 and the negative electrode layer P40. The separator P30 is, for example, a polyolefin (PO) microporous film.

[0041] The negative electrode layer P40 is provided between the separator P30 and the negative electrode collector P11. The negative electrode layer P40 contains a gel polymer compound, negative electrode active material particles, and a conductive filler. The gel polymer compound may be a conductive resin.

[0042] The current collector P10 is provided on the opposite side of the negative electrode layer P40 to the side in contact with the separator P30. In the current collector P10 on the negative electrode side, the negative electrode current collector P11 is in contact with the negative electrode layer P40, and the positive electrode current collector P13 is arranged on the opposite side.

[0043] The configuration of the battery P100 according to the present embodiment has been described above, and the battery P100 may include a structural material for maintaining the shape of the battery P100, etc. in addition to the above-mentioned components. In addition, the battery P100 may be designed as a stack of a plurality of batteries P100.

[0044] In the above-mentioned battery P100, the collector P10 can be manufactured, for example, in the following manner. That is, the manufacturer first forms a collector substrate P12. Then, the manufacturer applies the negative electrode collector P11 on one side of the formed collector substrate P12 and dries the negative electrode collector P11. Further, the manufacturer applies the positive electrode collector P13 on the other side of the collector substrate P12 and dries the positive electrode collector P13. In this way, the manufacturer of the collector P10 can process each layer by batch processing. However, since the composition constituting the collector P10 has a high viscosity, the quality of the above method is not stable, and it is not suitable as a manufacturing method for mass production from the perspective of yield. Furthermore, since the coating process involves a large number of production steps, it is difficult to reduce the manufacturing cost from the perspective of lead time (process time). Therefore, a method for efficiently mass-producing the collector P10 is desired.

[0045] On the other hand, for example, when a polyethylene resin film is manufactured, a resin material heated and kneaded by an extruder is sometimes stretched to be formed by using a T-die method. Therefore, for example, if the above-mentioned collector P10 can be manufactured using the T-die method, continuous manufacturing can be achieved. However, unlike the case of forming a resin film using the T-die method, the collector P10 includes a predetermined percentage of a conductive filler. Therefore, when the T-die method is used, it is necessary to advantageously form a composition containing a conductive filler. Specifically, for example, the collector P10 is required to have a conductive filler that is advantageously dispersed in the matrix resin and uniform.

[0046] Next refer to Figure 2 The battery material production system 10 will be described. Figure 2FIG. 1 is a diagram showing the overall structure of a battery material production system 10 according to Example 1. Figure 2 The battery material manufacturing system 10 shown in the figure is a schematic diagram of the composition for easy understanding. The battery material manufacturing system 10 shown in the figure manufactures the above-mentioned collector P10. That is, the battery material manufacturing system 10 simultaneously and continuously forms the negative electrode collector P11, the collector substrate P12 and the positive electrode collector P13. As main components, the battery material manufacturing system 10 includes a raw material input block 100, a battery material manufacturing device 200 and a rolling block 300.

[0047] Note that, in order to facilitate the explanation of the positional relationship between the components, Figure 2 A right-handed orthogonal coordinate system is attached. In addition, Figure 3 and subsequent figures, when an orthogonal coordinate system is attached, Figure 2 The X-axis, Y-axis and Z-axis directions in are corresponded to the X-axis, Y-axis and Z-axis directions of the orthogonal coordinate system in these drawings, respectively.

[0048] The raw material input block 100 receives raw materials for forming a composition constituting a layer of the current collector P10, performs predetermined processing on the received raw materials, and then supplies the raw materials to the battery material manufacturing device 200. The raw material input block 100 includes a first extrusion device 101, a second extrusion device 102, and a third extrusion device 103 as main components.

[0049] The first extrusion device 101 receives, for example, a predetermined resin and filler as raw materials for the negative electrode collector P11. The first extrusion device 101 mixes the received raw materials and supplies the composition for forming the negative electrode collector P11 to the battery material manufacturing device 200 via the first delivery portion 111. The first extrusion device 101 is, for example, a twin-screw extruder. In addition, the first delivery portion 111 is, for example, a gear pump. With this configuration, the first extrusion device 101 can advantageously mix the raw materials and supply (pump) the composition for the negative electrode collector P11 to the battery material manufacturing device 200 at a predetermined pressure.

[0050] The second extrusion device 102 receives, for example, a predetermined resin and filler as a raw material for the current collector substrate P12. The second extrusion device 102 mixes the received raw materials and supplies the composition for forming the current collector substrate P12 to the battery material manufacturing device 200 via the second delivery unit 112. The second extrusion device 102 is, for example, a twin-screw extruder. In addition, the second delivery unit 112 is, for example, a gear pump. With this configuration, the second extrusion device 102 can advantageously mix the raw materials and supply the composition for the current collector substrate P12 to the battery material manufacturing device 200 at a predetermined pressure.

[0051] The third extrusion device 103 receives, for example, a predetermined resin and filler as raw materials for the positive electrode collector P13. The third extrusion device 103 mixes the received raw materials and supplies the composition for forming the positive electrode collector P13 to the battery material manufacturing device 200 via the third delivery unit 113. The third extrusion device 103 is, for example, a twin-screw extruder. In addition, the third delivery unit 113 is, for example, a gear pump. With such a configuration, the third extrusion device 103 can advantageously mix the raw materials and supply the composition for the positive electrode collector P13 to the battery material manufacturing device 200 at a predetermined pressure.

[0052] The battery material manufacturing device 200 receives a plurality of compositions from the raw material input block 100 and continuously delivers sheet-shaped molded products, wherein the received compositions are combined into layers. The battery material manufacturing device 200 includes a so-called T-die. Note that the details of the battery material manufacturing device 200 will be described later. The battery material manufacturing device 200 delivers a collector P10, wherein the negative electrode collector P11, the collector substrate P12, and the positive electrode collector P13 are formed into layers. At this time, the thickness of the collector P10 delivered from the delivery port 240 is about 20 microns to 150 microns. A thinner collector P10 is more preferred.

[0053] As main components, the calendering block 300 includes a first calendering device 301, a second calendering device 302, and a third calendering device 303. The calendering block 300 receives the current collector P10 sent out from the battery material manufacturing device 200, and calenders the received current collector P10 at the first calendering device 301. The first calendering device 301 clamps the front and back sides of the current collector P10 using calendering rollers, and compresses the current collector P10 while sending out the current collector P10.

[0054] The first calendering device 301 supplies the rolled current collector P10 to the second calendering device 302. The second calendering device 302 further calenders the current collector P10 sent out from the first calendering device 301, and supplies the rolled current collector P10 to the third calendering device 303. The third calendering device 303 further calenders the current collector P10 sent out from the second calendering device 302, and sends the current collector P10 to a subsequent process.

[0055] At this time, when comparing the delivery speed (first delivery speed) of the collector P10 delivered by the first calendering device 301 and the delivery speed (second delivery speed) of the collector P10 delivered by the second calendering device 302 in the process following the process of the first calendering device 301, the second delivery speed is faster than the first delivery speed. In other words, when the diameter of the calendering roller of the first calendering device 301 is equal to the diameter of the calendering roller of the second calendering device 302, the rotation speed of the second calendering device 302 is faster than the rotation speed of the first calendering device 301. Similarly, when comparing the delivery speed (second delivery speed) of the collector P10 delivered by the second calendering device 302 and the delivery speed (third delivery speed) of the collector P10 delivered by the third calendering device 303 in the process following the process of the second calendering device 302, the third delivery speed is faster than the second delivery speed. In other words, when the diameter of the calendering roller of the second calendering device 302 is equal to the diameter of the calendering roller of the third calendering device 303 , the rotation speed of the third calendering device 303 is faster than the rotation speed of the second calendering device 302 .

[0056] By individually controlling the speed of each calendering device of the calendering block 300 in this way, the calendering block 300 can cause the pushing force in the thickness direction of the current collector P10 to be superimposed with the tensile force in the feeding direction of the current collector P10. Therefore, by using the calendering block 300, the current collector P10 can be quickly processed to be thinner. As a result, the productivity of the battery material manufacturing system 10 can be improved.

[0057] In addition to the above components, the calendering block 300 may further include a heating device. In addition, the calendering block 300 only needs to include one or more calendering devices. The calendering block 300 calenders the collector P10 received from the battery material manufacturing device 200 so that the collector P10 has a thickness of, for example, about 500 microns to 50 microns.

[0058] The battery material manufacturing system 10 has been described above. The battery material manufacturing system 10 may further include a process of cutting the collector P10 in a post-process of the rolling block 300. Alternatively, the battery material manufacturing system 10 may further include a device for winding the battery material manufacturing system 10 in a post-process of the rolling block 300.

[0059] Next, we will refer to Figure 3 and Figure 4 The battery material production apparatus 200 is further described. Figure 3 It is a first cross-sectional view of the battery material manufacturing apparatus 200 . Figure 4 This is a second cross-sectional view of the battery material manufacturing device. Figure 4 The cross-sectional view shown is Figure 3The battery material manufacturing apparatus 200 includes a receiving port 210 , an expanding portion 220 , a coupling portion 230 , and a delivery port 240 as main components.

[0060] The receiving port 210 respectively and continuously receives a plurality of compositions different from each other in the form of fluids, the compositions including a thermoplastic polymer and a conductive filler. Figure 3 The battery material manufacturing device 200 shown includes a first receiving port 210A, a second receiving port 210B, and a third receiving port 210C as receiving ports 210. The first receiving port 210A receives the negative electrode current collector P11. The second receiving port 210B receives the current collecting substrate P12. The third receiving port 210C receives the positive electrode current collector P13. The first receiving port 210A, the second receiving port 210B, and the third receiving port 210C respectively receive a composition containing a conductive filler having a size of less than 500 microns and a mass percentage of more than 20% to less than 70%, where the size of the conductive filler refers to the particle size or fiber length of the conductive filler.

[0061] The spreading part 220 guides the composition injected from each receiving port 210 in the delivery direction (ie, the negative direction of the Z axis in the figure) while spreading the composition in the direction orthogonal to the delivery direction (ie, the Y axis direction).

[0062] The branching portion 222 is formed by extending from each of the connection portions 221 connected to the receiving port 210 in the orthogonal direction ( Figure 4 The guide portion 223 is a slit-shaped space, each of which is formed along the delivery direction from each branch portion of the branch portion 222. The extension portion 220 extends the composition in the aforementioned orthogonal direction through the branch portion 222, and guides the composition from there to the guide portion 223, so as to process the composition into a desired shape.

[0063] The combining part 230 combines the plurality of compositions guided in the delivery direction from the spreading part 220 into a layer. Then, the combining part 230 guides the combined layered composition in the delivery direction.

[0064] The delivery port 240 is a slit-shaped opening that can continuously deliver the plurality of compositions that have been stretched and combined to form an integrated structure as delivery objects. Figure 3 As shown, in the current collector P10 sent out from the sending-out port 240 , the negative electrode current collector P11 , the current collecting substrate P12 , and the positive electrode current collector P13 are formed in a layer shape and a sheet shape.

[0065] Note that in addition to the above composition, the battery material manufacturing apparatus 200 may include a temperature control device. Therefore, the battery material manufacturing apparatus 200 can suppress the non-uniformity of the composition by appropriately adjusting the temperature and the delivery pressure of each of the negative electrode collector P11, the current collecting substrate P12, and the positive electrode collector P13.

[0066] The battery material manufacturing system 10 has been described above, but the battery material manufacturing system 10 is not limited to the above structure. For example, the raw material input block 100 may include four or more extrusion devices. In this case, the battery material manufacturing device 200 includes a receiving port 210 corresponding to the number of extrusion devices, and stacks the composition into layers and sends them out from the delivery port 240.

[0067] The calendering block 300 only needs to include one or more calendering devices, and may include four or more calendering devices. The calendering block 300 may include a heating device in each calendering device. The calendering block 300 calenders the current collector P10 while controlling the temperature of the current collector P10, so that the current collector P10 can be calendered while maintaining the function of the conductive filler.

[0068] Figure 5 It is a cross-sectional view showing a second example of the battery material manufacturing apparatus. Figure 5 A battery material manufacturing apparatus 400 is shown. The battery material manufacturing system 10 may include the battery material manufacturing apparatus 400 instead of the battery material manufacturing apparatus 200 .

[0069] The battery material manufacturing apparatus 400 differs from the battery material manufacturing apparatus 200 in the positional relationship between the coupling portion 230 and the extending portion 220. Figure 5 As shown, the battery material manufacturing device 400 combines the multiple compositions injected from the respective receiving ports 210 into a layer at the combining portion 230. Then, the combining portion 230 sends the combined layered composition to the stretching portion 220. Note that the area including the combining portion 230 may be referred to as a feed block. The feed block may be designed in a form in which the combining portion 230 is replaceable.

[0070] The spreading part 220 guides the layered composition supplied from the combining part 230 in the delivery direction while spreading the composition in a direction orthogonal to the delivery direction. The spreading part 220 delivers the spread composition to the delivery port 240. Note that the spreading part 220 may be designed to include a branch part 222 and a guide part 223.

[0071] Next describe Figure 6Due to the nature of the composition, the battery material manufactured by the battery material manufacturing system 10 has a predetermined viscosity (e.g., about 1000 mPas to 100,000 Pas). In addition, the composition is in a state of being mixed by an extruder. Therefore, the composition injected into the battery material manufacturing device 200 or the battery material manufacturing device 400 may contain gas, such as air. Therefore, the battery material manufacturing device 200 or the battery material manufacturing device 400 includes Figure 6 The degassing section 500 is shown to remove gas contained in the composition.

[0072] Figure 6 1 is a diagram for explaining the structure of the degassing section 500. The degassing section 500 includes a branching section 510, a branching pipe 520, a storage section 530, and a delivery pipe 540 as main components.

[0073] The branching part 510 is a flow path of the composition provided in the battery material manufacturing apparatus 200 or the battery material manufacturing apparatus 400. The purpose of the branching part 510 is to remove gas, such as bubbles, contained in the composition. Therefore, the branching part 510 can be provided at multiple locations of the battery material manufacturing apparatus 200 or the battery material manufacturing apparatus 400.

[0074] The branch pipe 520 is a pipe for guiding at least the gas contained in the composition from the branch portion 510. Therefore, the flow path cross-sectional area of ​​the branch pipe 520 is sufficiently small compared with the flow path cross-sectional area of ​​the composition.

[0075] The storage part 530 is connected to the branch pipe 520 and is disposed above the branch pipe 510, and is a predetermined space having a flow path cross-sectional area greater than the flow path cross-sectional area of ​​the branch pipe 520. With this configuration, even if the composition itself flows from the branch pipe 510 into the branch pipe 520, the degassing part 500 can suppress the composition from further flowing back from the storage part 530.

[0076] The outlet pipe 540 guides the gas accumulated in the storage section 530 to the outside of the battery material manufacturing device 200 or the battery material manufacturing device 400. The outlet pipe 540 is connected to a vacuum pump, for example. Therefore, the degassing section 500 sucks the gas contained in the composition. Note that the vacuum pump may be connected to a plurality of outlet pipes 540. The storage section 530 may be connected to a plurality of branch pipes 520. With this configuration, the battery material manufacturing system 10 can suppress the generation of bubbles in the battery material.

[0077] The battery material manufacturing system 10 can simultaneously and continuously form two or more different battery materials. In addition, the battery material manufacturing system 10 forms two or more battery materials while controlling the pressure during manufacturing. As a result, the battery material manufacturing system 10 can continuously form a homogeneous battery material. Therefore, according to Embodiment 1, a battery material manufacturing device and the like that can continuously and efficiently manufacture battery materials can be provided.

[0078] <Example 2>

[0079] Next, refer to Figure 7 Example 2 is described. Figure 7 This is an overall configuration diagram of a battery material manufacturing system according to Example 2. Figure 7 The battery material manufacturing system 20 shown is different from that of Example 1 in that it includes a stretching device 600 .

[0080] The stretching device 600 stretches the current collector P10 which is a product sent out from the battery material manufacturing device 200 . Furthermore, the stretching device 600 supplies the stretched current collector P10 to the rolling block 300 .

[0081] When the battery material is continuously manufactured, the collector P10 sent out by the battery material manufacturing device 200 is preferably thin. However, it is difficult to thin the composition containing the filler using only the T-die as a component of the battery material manufacturing device 200. Therefore, the battery material manufacturing system 10 according to Example 1 includes a calendering block 300 in the post-process of the battery material manufacturing device 200. By using the calendering block 300, the battery material manufacturing system 10 can thin the collector P10. However, when the thick collector P10 is supplied to the calendering block 300, the thickness of the collector P10 may be uneven, or the filler dispersed in the collector P10 may exist unevenly. In order to prevent this, it is necessary to increase the number of calendering devices constituting the calendering block 300. More specifically, in order to thin the 1mm thick collector P10 to have a thickness of 0.05mm, the calendering block 300 requires, for example, more than four calendering devices. Therefore, in this embodiment, the stretching device 600 is provided between the battery material manufacturing device 200 and the rolling block 300. The stretching device 600 includes a tension sensor 610, a stretching roller 620, a rotation driving part 621, a displacement driving part 622, and a driving control part 630 as main components.

[0082] Therefore, it is possible to reduce the number of calendering devices constituting the calendering block 300. More specifically, by using the stretching device 600, the 1 mm thick current collector P10 is made to have a thickness of 0.5 mm, so that the number of calendering devices constituting the calendering block 300 becomes, for example, three or less, so as to further thin the thickness of the current collector P10 from 0.5 mm to 0.05 mm through the calendering block 300.

[0083] The tension sensor 610 measures the tension applied to the collector P10 as the delivered object. More specifically, the tension sensor 610 is placed between the delivery port 240 of the battery material manufacturing device 200 and the stretching roller 620, and measures the force applied to the collector P10 in the stretching direction as tension. For example, Figure 7 The tension sensor 610 shown includes a driven roller between the delivery port 240 and the stretching roller 620 and measures a radial force to which the driven roller is subjected. The tension sensor 610 provides the drive control section 630 with the measured tension data.

[0084] The stretching roller 620 is a roller designed to pull and draw out the sheet-shaped feed material fed out from the feed outlet at the first speed V1. The rotation of the stretching roller 620 is driven by the rotation drive unit 621. The position of the stretching roller 620 is set by the displacement drive unit 622.

[0085] The rotation drive unit 621 drives the stretching roller 620 to deliver the current collector P10 as a delivery object in the delivery direction at a second speed V2 faster than the first speed V1. The rotation drive unit 621 includes a motor, a speed reducer, etc., which is rotationally driven by receiving a control signal from the drive control unit 630.

[0086] The displacement drive section 622 displaces the stretching roller 620. More specifically, the displacement drive section 622 includes, for example, a linear rail, a bearing engaged with the linear rail to support the stretching roller 620, and a motor driving the bearing along the linear rail. The displacement drive section 622 displaces the stretching roller 620 upon receiving a control signal from the drive control section 630.

[0087] The drive control section 630 includes a drive circuit for driving each of the rotation drive section 621 and the displacement drive section 622, and an operation circuit for driving each of the rotation drive section 621 and the displacement drive section 622 according to the tension data received from the tension sensor 610. The drive control section 630 adjusts the rotation speed of the stretching roller 620 according to the tension. In addition, the drive control section 630 causes the displacement drive section 622 to displace the stretching roller according to the tension. In this way, the stretching device 600 stretches the collector P10 while suppressing the tension excessively applied to the collector P10.

[0088] Embodiment 2 has been described above. The rolling block 300 and the stretching device 600 preferably include a temperature control unit so that the collector P10 can be heated. In this way, the collector P10 containing the filler can be softened to facilitate thinning. When two or more different battery materials are formed simultaneously and continuously, the above-mentioned battery material manufacturing system 20 can suppress the non-uniformity of the properties of the collector P10 while gradually thinning the battery material. Therefore, according to Embodiment 2, a battery material manufacturing device capable of continuously and efficiently manufacturing battery materials, etc. can be provided.

[0089] <Example 3>

[0090] Reference Figure 8 Example 3 is described. Figure 8 is a configuration diagram of a battery material manufacturing system 30 according to Example 3. The battery material manufacturing system 30 is different from the previous embodiment in that it includes a casting block 700. Note that the battery material manufacturing system 30 may include a rolling block 300 and a stretching device 600 in a process after the process of the casting block 700, but the details thereof will be omitted here.

[0091] The casting block 700 is located below the battery material manufacturing apparatus 200 and stretches the current collector P10 sent out from the battery material manufacturing apparatus 200. The casting block 700 mainly includes a casting roll 710, a rotation drive unit 720, a displacement drive unit 730, and a drive control unit 740.

[0092] The casting roller 710 is a roller rotated by the rotation drive unit 720. The casting roller 710 receives the collector P10 on the surface of the roller while rotating, and sends the collector P10 to the next process. At this time, the speed on the surface of the casting roller 710 is the speed V2. Here, the speed V2 is set to be faster than the sending speed V1 of the collector P10 sent from the battery material manufacturing device 200. In this way, the casting roller 710 can stretch the collector P10. In addition, the casting roller 710 contacts the collector P10 to cool the collector P10.

[0093] The rotation drive unit 720 rotates the casting roll 710 according to the command of the drive control unit 740. The rotation drive unit 720 includes a motor for rotating the casting roll 710, a sensor for measuring the rotation speed of the casting roll 710, and the like.

[0094] The displacement drive unit 730 displaces the mold roller 710 in the Z-axis direction (i.e., the up-down direction) in the figure and the X-axis direction (i.e., the horizontal direction, or the thickness direction of the collector P10 fed in a sheet form) in the figure. More specifically, the displacement drive unit 730 includes, for example, linear rails movable in the Z-axis direction and the X-axis direction, respectively, bearings engaged with the linear rails to support the casting roller 710, and motors driving the bearings along the linear rails. The displacement drive unit 730 displaces the mold roller 710 upon receiving a control signal from the drive control unit 740.

[0095] The drive control unit 740 includes a drive circuit for driving each of the rotation drive unit 720 and the displacement drive unit 730, and an operation circuit for driving each of the rotation drive unit 720 and the displacement drive unit 730 based on data received from the rotation drive unit 720 and the displacement drive unit 730 regarding the rotation speed of the casting roller 710 and the position of the casting roller 710.

[0096] Through the above-mentioned structure, the casting block 700 stretches the high-temperature and fluid collector P10 sent out from the battery material manufacturing device 200 while cooling it. Usually, when the resin is molded and stretched into a film, the resin in a solidified form is stretched. However, when the sheet-shaped collector P10 containing fillers is stretched in a solidified state, especially when the sheet thickness is, for example, 1 mm, such as the sheet just sent out from the stretching section 220, when stretched by the stretching device 600, the sheet may break or uneven thickness may occur in the sheet. In order to prevent this, the stretching device 600 needs to stretch at a relatively low speed. Therefore, using the above-mentioned structure, by performing a small amount of stretching in a molten state, the battery material manufacturing system 30 can quickly, widely and uniformly thin the sheet-shaped collector P10 containing fillers.

[0097] For example, using the above-mentioned configuration, the mold block 700 stretches the 1 mm thick collector P10 to have a thickness of 0.85 mm. In other words, the mold block 700 stretches the collector P10 with a thickness of 0.15 mm. Here, the thickness stretched by the mold block 700 is not particularly limited, but is preferably less than the thickness stretched by the stretching device 600. That is, the thickness of the collector P10 stretched by the stretching device 600 is, for example, 0.35 mm, while the thickness of the collector P10 stretched by the mold block 700 is 0.15 mm. Note that the mold block 700 stretches the collector P10 at a relatively low temperature compared to the temperature of the collector P10 delivered from the delivery port 240. The mold block 700 may include a temperature control unit for adjusting the temperature of the collector P10.

[0098] In addition, by displacing the casting roller 710, the casting block 700 can advantageously adjust the stretching conditions of the collector P10. Specifically, the casting block 700 adjusts the temperature of the collector P10 contacting the casting roller 710 by adjusting the position of the casting roller 710 in the up and down direction (Z-axis direction). In this way, the casting block 700 can adjust the degree of solidification of the collector P10. In addition, the casting block 700 adjusts the position of the casting roller 710 contacted by the collector P10 by adjusting the position of the casting roller 710 in the horizontal direction (X-axis direction). In this way, the casting block 700 can adjust the degree of stretching of the collector P10. Note that in the casting block 700, the position of the casting roller 710 can be changed according to the composition of the collector P10.

[0099] Embodiment 3 is described above. The casting block 700 of the battery material manufacturing system 30 includes a casting roller 710, which is designed to receive the collector P10 as a sheet-shaped feed material fed from the feed port at a first speed V1, and feed the collector P10 while winding the collector P10. In addition, the casting block 700 includes a rotation drive unit 720, which is designed to rotationally drive the casting roller 710, so as to feed the feed material in the feeding direction at a second speed V2 faster than the first speed V1.

[0100] In addition, the mold block 700 further includes a displacement drive unit 730 designed to displace the mold roller 710 in the vertical direction and the horizontal direction. In addition, the drive control unit 740 of the mold block 700 displaces the mold roller 710 in order to adjust the solidification degree and the stretching degree of the delivered object.

[0101] Note that the current collector P10 stretched in the casting block 700 can be reheated in the stretching device 600 or the rolling block 300 in a process after the process of the casting block 700. In this way, the stretching device 600 or the rolling block 300 can effectively stretch the current collector P10. The temperature control unit described so far may have a function of controlling the temperature of the current collector P10 according to the size in the thickness direction of the current collector P10. In other words, the battery material manufacturing system 30 has a function of measuring the size in the thickness direction of the current collector P10, and in addition, the temperature control unit that cooperates with the predetermined rolling function can set the temperature according to the size in the thickness direction. Through this configuration, the battery material manufacturing system 30 can process the current collector P10 to a desired thickness.

[0102] As described above, according to Example 3, it is possible to provide a battery material production apparatus or the like capable of continuously and efficiently producing a battery material containing a filler while favorably adjusting production conditions.

[0103] The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes may be made to the details or configurations of the present invention within the scope of the present invention that can be understood by those skilled in the art.

[0104] This application claims priority based on Japanese patent application JP2022-106875 filed on July 1, 2022, Japanese patent application JP2022-171491 filed on October 26, 2022, and Japanese patent application JP2022-209379 filed on December 27, 2022, the entire contents of which are incorporated herein by reference.

[0105] Industrial Applicability

[0106] The present disclosure may be used, for example, in systems for manufacturing lithium-ion batteries and battery materials which are a type of semi-solid state battery.

[0107] Reference numerals list

[0108] 10 Battery Material Manufacturing System

[0109] 20 Battery Material Manufacturing System

[0110] 30 Battery Material Manufacturing System

[0111] 100 Raw materials input block

[0112] 101 First Extrusion Device

[0113] 102 Second extrusion device

[0114] 103 The third extrusion device

[0115] 111 First delivery section

[0116] 112 Second delivery section

[0117] 113 Third delivery section

[0118] 200 Battery material manufacturing equipment

[0119] 210 Receiving port

[0120] 220 Extension

[0121] 221 Connection

[0122] 222 Branch

[0123] 223 Guidance Department

[0124] 230 Joint

[0125] 240 Send to the exit

[0126] 300 Calendering Block

[0127] 301 First Calendering Device

[0128] 302 Second calendering device

[0129] 303 The third calendering device

[0130] 400 Battery material manufacturing equipment

[0131] 500 Degassing Section

[0132] 510 Divergence Department

[0133] 520 Branch pipe

[0134] 530 Storage Department

[0135] 540 Export pipe

[0136] 600 Tensioning device

[0137] 610 Tension Sensor

[0138] 620 stretching roller

[0139] 621 Rotation drive unit

[0140] 622 Displacement drive unit

[0141] 630 Drive Control Unit

[0142] 700 Casting Block

[0143] 710 Casting Roller

[0144] 720 Rotation drive unit

[0145] 730 Displacement drive unit

[0146] 740 Drive Control Unit

[0147] P10 Current Collector

[0148] P11 Positive electrode collector

[0149] P12 Current Collector Substrate

[0150] P13 Negative electrode collector

[0151] P20 positive electrode layer

[0152] P30 Diaphragm

[0153] P40 negative electrode layer

[0154] P100 battery.

Claims

1. Battery material manufacturing device, comprising: a receiving port, the receiving port being designed to respectively and continuously receive a plurality of compositions different from each other in fluid form; A stretching portion, wherein the stretching portion is designed to guide the injected composition along a delivery direction while stretching each of the compositions in a direction orthogonal to the delivery direction; a combining portion, the combining portion being designed to combine the plurality of compositions into a layer and guide the plurality of compositions along the sending direction; as well as The delivery port is a slit-shaped opening capable of continuously delivering the plurality of compositions that are stretched and combined to be integrated as delivery objects.

2. The battery material manufacturing device according to claim 1, wherein: The receiving port receives a composition including a conductive filler.

3. The battery material manufacturing device according to claim 2, wherein: The plurality of receiving ports receive the respective compositions for forming the positive electrode current collector, the current collecting substrate and the negative electrode current collector, respectively, and The delivery port delivers the positive electrode current collector, the current collecting substrate, and the negative electrode current collector formed in a layered state.

4. The battery material manufacturing device according to claim 3, wherein: The delivery port delivers the delivery object including the battery current collector in a sheet form.

5. The battery material manufacturing device according to claim 4, wherein: The battery material manufacturing device further includes a degassing section, wherein the degassing section includes: a branching portion disposed in a flow path of the composition; a branch pipe designed to guide at least the gas contained in the composition from the branch portion; a storage portion connected to the branch pipe and disposed above the branch portion, the storage portion being a predetermined space having a flow path cross-sectional area greater than a flow path cross-sectional area of ​​the branch pipe; and The outlet pipe is designed to guide the gas accumulated in the storage portion to the outside.

6. The battery material production device according to any one of claims 1 to 5, wherein: The extension portion comprises: Branch portions, each of the branch portions being a space extending in two branches along the orthogonal direction from each of the connection portions respectively connected to the receiving port; and The guide parts are each a slit-shaped space formed along the sending direction from each branch part of the branch parts.

7. Battery material manufacturing system, including: The battery material manufacturing device according to claim 1; as well as An extruder is designed to pump the composition by controlling the delivery pressure of each of the receiving ports.

8. The battery material manufacturing system according to claim 7, wherein: It also includes a calendering device, which is designed to calender the sheet-shaped object delivered from the delivery port by clamping the front and back sides of the sheet-shaped object delivered from the delivery port.

9. The battery material manufacturing system according to claim 8, wherein: The calendering device comprises: A first calendering device, which is designed to calender the feedstock at a first feed speed; and A second calendering device is designed to calender the feedstock fed out from the first calendering device at a second feed-out speed faster than the first feed-out speed.

10. The battery material production system according to any one of claims 7 to 9, wherein: Also included is a stretching device, the stretching device comprising: a stretching roller designed to pull and draw out the sheet-like feedout fed out from the feedout port at a first speed; and A rotation driving unit is configured to rotationally drive the stretching roller so as to feed the feed material in the feeding direction at a second speed faster than the first speed.

11. The battery material manufacturing system according to claim 10, wherein: The stretching device also includes: a tension sensor designed to measure the tension to which the delivered object is subjected; and A drive control unit is configured to adjust a rotation speed of the stretching roller according to the tension.

12. The battery material manufacturing system according to claim 11, wherein: The stretching device further comprises a displacement driving unit designed to displace the stretching roller, and The drive control unit adjusts a rotation speed of the stretching roller or displaces the stretching roller according to tension.

13. The battery material manufacturing system according to any one of claims 7 to 9, further comprising a casting block, wherein the casting block comprises: a casting roller, which is designed to receive the sheet-like feed material fed from the feed port at a first speed, and to pull out the feed material while winding the feed material; as well as A rotation driving unit is configured to rotationally drive the casting roller so as to deliver the delivered object along the delivering direction at a second speed faster than the first speed.

14. The battery material manufacturing system according to claim 13, wherein: The casting block also includes: A displacement driving unit, which is designed to displace the casting roller in the vertical direction and the horizontal direction; and A drive control unit is configured to displace the casting rolls to adjust the degree of solidification and stretching of the delivered material.

15. A method for manufacturing a battery material, comprising: Receiving respectively and continuously each of a plurality of compositions different from each other, the plurality of compositions being in fluid form and comprising a thermoplastic polymer and a conductive filler; while guiding the injected composition in a delivery direction, each of the compositions is extended in a direction orthogonal to the delivery direction; combining the plurality of compositions into a layer and directing the plurality of compositions along the delivery direction; as well as The plurality of compositions integrated through stretching and combining are continuously delivered.

16. Battery material manufacturing device, comprising: a plurality of receiving ports, which are designed to respectively and successively receive a composition in the form of a fluid having at least the same composition; A spreading portion configured to guide the injected composition in a delivery direction while spreading each of the compositions in a direction orthogonal to the delivery direction; a combining portion configured to combine the plurality of compositions into a layer and guide the plurality of compositions along the sending direction; as well as a delivery port which is a slit-shaped opening capable of continuously delivering the plurality of compositions which are stretched and combined to be integrated as a delivery object, Wherein, the battery material manufacturing device further includes a degassing section, and the degassing section includes: a branching portion disposed in a flow path of the composition; a branch pipe designed to guide at least the gas contained in the composition from the branch portion; a storage portion connected to the branch pipe and disposed above the branch portion, the storage portion being a predetermined space having a flow path cross-sectional area greater than a flow path cross-sectional area of ​​the branch pipe; and The outlet pipe is designed to guide the gas accumulated in the storage portion to the outside.

17. The battery material manufacturing device according to claim 16, wherein: The receiving port receives a composition including a conductive filler.

18. The battery material manufacturing device according to claim 17, wherein: The plurality of receiving ports receive the respective compositions for forming the positive electrode current collector, the current collecting substrate and the negative electrode current collector, respectively, and The delivery port delivers the positive electrode current collector, the current collecting substrate, and the negative electrode current collector formed in a layered state.

19. The battery material manufacturing device according to claim 18, wherein: The delivery port delivers the delivery object including the battery current collector in a sheet form.

20. The battery material production device according to any one of claims 16 to 19, wherein: The extension portion comprises: Branch portions, each of the branch portions being a space extending in two branches along the orthogonal direction from each of the connection portions respectively connected to the receiving port; and The guide parts are each a slit-shaped space formed along the sending direction from each branch part of the branch parts.

21. Battery material manufacturing system, including: Battery material manufacturing equipment and extruders, The battery material manufacturing device comprises: a plurality of receiving ports, which are designed to respectively and successively receive a composition in the form of a fluid having at least the same composition; A spreading portion configured to guide the injected composition in a delivery direction while spreading each of the compositions in a direction orthogonal to the delivery direction; a combining portion configured to combine the plurality of compositions into a layer and guide the plurality of compositions along the sending direction; and A delivery port, which is a slit-shaped opening capable of continuously delivering the plurality of compositions that are stretched and combined to be integrated as a delivery object; The extruder is designed to pump the composition by controlling the delivery pressure of each of the receiving ports, The battery material manufacturing system further includes a calendering device, which is designed to calender the sheet-shaped object delivered from the delivery port by clamping the front and back sides of the sheet-shaped object delivered from the delivery port.

22. The battery material manufacturing system according to claim 21, wherein: The calendering device comprises: A first calendering device, which is designed to calender the feedstock at a first feed speed; and A second calendering device is designed to calender the feedstock fed out from the first calendering device at a second feed-out speed faster than the first feed-out speed.

23. Battery material manufacturing system, including: Battery material manufacturing equipment and extruders, The battery material manufacturing device comprises: a plurality of receiving ports, which are designed to respectively and successively receive a composition in the form of a fluid having at least the same composition; A spreading portion configured to guide the injected composition in a delivery direction while spreading each of the compositions in a direction orthogonal to the delivery direction; a combining portion configured to combine the plurality of compositions into a layer and guide the plurality of compositions along the sending direction; and A delivery port, which is a slit-shaped opening capable of continuously delivering the plurality of compositions that are stretched and combined to be integrated as a delivery object; The extruder is designed to pump the composition by controlling the delivery pressure of each of the receiving ports, Wherein, the battery material manufacturing system further includes a stretching device, and the stretching device includes: a stretching roller designed to pull and draw out the sheet-like feedout fed out from the feedout port at a first speed; and A rotation driving unit is configured to rotationally drive the stretching roller so as to feed the feed material in the feeding direction at a second speed faster than the first speed.

24. The battery material manufacturing system according to claim 23, wherein: The stretching device also includes: a tension sensor designed to measure the tension to which the delivered object is subjected; and A drive control unit is configured to adjust a rotation speed of the stretching roller according to the tension.

25. The battery material manufacturing system according to claim 24, wherein: The stretching device further comprises a displacement driving unit designed to displace the stretching roller, and The drive control unit adjusts the rotation speed of the stretching roller or displaces the stretching roller according to the tension.

26. Battery material manufacturing system, including: Battery material manufacturing equipment and extruders, The battery material manufacturing device comprises: a plurality of receiving ports, which are designed to respectively and successively receive a composition in the form of a fluid having at least the same composition; A spreading portion configured to guide the injected composition in a delivery direction while spreading each of the compositions in a direction orthogonal to the delivery direction; a combining portion configured to combine the plurality of compositions into a layer and guide the plurality of compositions along the sending direction; and A delivery port, which is a slit-shaped opening capable of continuously delivering the plurality of compositions that are stretched and combined to be integrated as a delivery object; The extruder is designed to pump the composition by controlling the delivery pressure of each of the receiving ports, Wherein, the battery material manufacturing system further includes a casting block, and the casting block includes: a casting roller configured to receive the sheet-like feed material fed from the feed port at a first speed and to wind up the feed material while pulling out the feed material; and A rotation driving unit is configured to rotationally drive the casting roller so as to deliver the delivered object along the delivering direction at a second speed faster than the first speed.

27. The battery material manufacturing system according to claim 26, wherein: The casting block also includes: A displacement driving unit, which is designed to displace the casting roller in the vertical direction and the horizontal direction; and A drive control unit is configured to displace the casting rolls to adjust the degree of solidification and stretching of the delivered material.

28. A method for manufacturing a battery material, comprising: Receiving a plurality of compositions in fluid form separately and continuously, each of the plurality of compositions at least comprising a thermoplastic polymer and a conductive filler as the same composition; while guiding the injected composition in a delivery direction, each of the compositions is extended in a direction orthogonal to the delivery direction; combining the plurality of compositions into a layer and directing the plurality of compositions along the delivery direction; Continuously delivering the plurality of composite materials that have been stretched and combined to form an integrated structure; as well as At least the gas contained in the composition is guided from a branch portion provided in a flow path of the composition to guide the gas accumulated above the branch portion to the outside.

29. A method for manufacturing a battery material, comprising: Receiving a plurality of compositions in fluid form separately and continuously, each of the plurality of compositions at least comprising a thermoplastic polymer and a conductive filler as the same composition; while guiding the injected composition in a delivery direction, each of the compositions is extended in a direction orthogonal to the delivery direction; combining the plurality of compositions into a layer and directing the plurality of compositions along the delivery direction; Continuously delivering the plurality of compositions that have been stretched and combined to form an integrated object as a delivery object; Wherein, the battery material manufacturing method includes any one of the following steps: The delivered object is pressed by clamping the front and back sides of the delivered sheet; Stretching is performed by pulling and drawing out a sheet-like feedout fed at a first speed and feeding the feedout in the feeding direction at a second speed faster than the first speed; as well as Casting is performed by receiving a sheet-like feed material fed at a third speed, winding the feed material while pulling out the feed material, and feeding the feed material in the feeding direction at a fourth speed faster than the third speed.

30. Battery material manufacturing system, including: Battery material manufacturing equipment and extruders, The battery material manufacturing device comprises: a plurality of receiving ports, which are designed to respectively and successively receive a composition in the form of a fluid having at least the same composition; A spreading portion configured to guide the injected composition in a delivery direction while spreading each of the compositions in a direction orthogonal to the delivery direction; a combining portion configured to combine the plurality of compositions into a layer and guide the plurality of compositions along the sending direction; and a delivery port which is a slit-shaped opening capable of continuously delivering the plurality of compositions which are stretched and combined to be integrated as a delivery object, The extruder is designed to pump the composition by controlling the delivery pressure of each of the receiving ports, Wherein, the battery material manufacturing system further includes any one of a casting block, a calendering device and a stretching device, and the casting block includes: a casting roller designed to pull out a sheet-like feed material fed from the feed port at a first speed while winding up the feed material; and a rotation driving unit configured to rotationally drive the casting roller so as to deliver the delivered object at a second speed faster than the first speed; The calendering device is designed to calender the delivered object by clamping the front and back sides of the received sheet-shaped delivered object; The stretching device comprises: a stretching roller designed to pull and draw out the received sheet-like feedout; and A rotation driving unit is configured to rotationally drive the stretching roller so as to feed the feed material at a third speed faster than the first speed or the second speed.

31. The battery material manufacturing system according to claim 30, wherein: The battery material manufacturing system includes a combination of two or more of the group consisting of the casting block, the calendering device, and the stretching device, which is used to process the sheet-like output from the output port in stages.

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