Fluidization device and battery manufacturing system including same

Abstract

The invention relates to a fluidization device and a battery manufacturing system including the fluidization device. Manufacturing of the dry electrode includes the use of a fluidization device. And a fluidizing device configured to mix the provided dry electrode mixture with a fluid, thereby fluidizing the dry electrode mixture, and to supply the fluidized dry electrode mixture to the film forming device. The fluidization device includes a chamber formed in a housing, the chamber configured to receive a dry electrode mixture, an inlet configured to allow fluid to enter the chamber, and an outlet configured to allow fluid in the chamber to exit through the outlet.

Description

Technical Field

[0001] The present invention relates to the manufacture of dry electrodes. Background Art

[0002] In recent years, rechargeable secondary batteries have expanded their applications to various fields, from small electronic devices to large energy storage systems. In particular, the rapid development of the electric vehicle market has led to active research and development of secondary batteries.

[0003] Each electrode of a secondary battery is conventionally manufactured using a wet process. In the wet process, a slurry is manufactured by dissolving the electrode active material, binder, and conductive agent contained in the electrode using a solvent. However, in recent years, a dry process has received widespread attention because it can increase the energy density of the battery compared to the wet process without using the solvent required in the wet process.

[0004] In the dry process, a dry electrode film is formed by mixing an electrode active material, a conductive agent, and a binder into a solvent-free mixture and forming the mixture into a film by pressing or calendaring. The formed dry electrode film can be bonded to a current collector, thereby manufacturing an electrode.

[0005] In the dry electrode manufacturing process, no solvent is used, so that the manufacturing time and cost can be reduced, and the film thickness can be controlled, so that a dry electrode film with high energy density can be obtained compared with the wet electrode manufacturing process.

[0006] However, due to the characteristics of the dry electrode mixture in a powder state, it is difficult to accelerate high-speed film formation for mass production of dry electrodes.

[0007] The above information disclosed in this Background section is provided only for deepening understanding of the background of the present invention and therefore it may contain information that does not constitute the prior art that is already known to those skilled in the art. Summary of the invention

[0008] The present invention is directed to solving the above-mentioned problems associated with the prior art.

[0009] An object of the present invention is to provide a fluidizing device and a feeding system comprising the fluidizing device, wherein the fluidizing device can facilitate the feeding of a dry electrode mixture to a film-forming roller during a film-forming process.

[0010] Another object of the present invention is to provide a fluidizing device and a feeding system including the fluidizing device, wherein the fluidizing device can improve the quality of a dry electrode formed into a thin film and can perform a film forming process at a high speed.

[0011] Another object of the present invention is to provide a battery manufacturing system including the fluidizing device and a battery including a dry electrode manufactured using the fluidizing device.

[0012] Another object of the present invention is to provide a battery manufacturing method including a process of fluidizing the dry electrode mixture.

[0013] The object of the present invention is not limited to the above-mentioned object. The object of the present invention will be clearly understood through the following description of the embodiments, and it can be implemented by the means defined in the claims and their combinations.

[0014] The features of the present invention for achieving the above-mentioned objects and for exerting the following characteristic functions are as follows.

[0015] In one aspect, the fluidization device is configured to mix the provided dry electrode mixture with a fluid to fluidize the dry electrode mixture, and supply the fluidized dry electrode mixture to the film forming device. The fluidization device includes a chamber formed in a housing, an inlet, and an outlet, the chamber being configured to receive the dry electrode mixture, the inlet being configured to allow the fluid to enter the chamber, and the outlet being configured to allow the fluid in the chamber to be discharged through the outlet.

[0016] In another aspect, a feeding system includes a feeding device configured to store a dry electrode mixture and a fluidizing device configured to receive the dry electrode mixture from the feeding device and mix the dry electrode mixture with a fluid to fluidize the dry electrode mixture.

[0017] In another aspect, a battery manufacturing method includes using a mixer to mix an electrode active material, a conductive agent, and a binder to produce a dry electrode mixture, using a fluidizing device to mix the produced dry electrode mixture with a fluid to fluidize the dry electrode mixture, and using a roll press to form the fluidized dry electrode mixture into a dry electrode film.

[0018] Other aspects and preferred embodiments of the invention are discussed infra. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features of the present invention will now be described in detail with reference to certain exemplary embodiments shown in the accompanying drawings, which are given hereinafter by way of illustration only and therefore do not limit the present invention, in which:

[0020] Figure 1 A diagram schematically showing a process for manufacturing a dry electrode;

[0021] Figure 2 shows the feeding area of ​​the dry electrode mixture during the process of manufacturing the dry electrode;

[0022] Figure 3 shows the bridges that form in the hopper during the feeding of the dry electrode mix;

[0023] Figure 4 The fluidizing device of the feed system according to the invention is shown;

[0024] Figure 5 Shows from Figure 4 Discharging the dry electrode mixture from the fluidizing device;

[0025] Figure 6 is a side view of a fluidization device according to an embodiment of the present invention;

[0026] Figure 7 and Figure 8 is a perspective view of a fluidization device according to an embodiment of the present invention;

[0027] Fig. 9 A perspective view showing a state in which a cover of a fluidizing device according to an embodiment of the present invention is opened;

[0028] Fig.10 and Fig.11 is a perspective view of a fluidization device according to an embodiment of the present invention; and

[0029] Fig.12 A feed system according to an embodiment of the present invention is shown.

[0030] It should be understood that the accompanying drawings are not drawn to scale, but rather are slightly simplified representations of various preferred features illustrating the basic principles of the present invention. The specific design features of the present invention disclosed herein (including, for example, specific dimensions, directions, locations, and shapes) will be determined in part by specific intended applications and use environments.

[0031] In the drawings, reference numbers refer to the same or equivalent parts of the present invention throughout the several views of the drawing. DETAILED DESCRIPTION

[0032] The specific structure or functional description of the embodiments of the present invention disclosed in this specification is only used to illustrate the embodiments of the present invention. Embodiments of the present invention can be implemented in various forms. In addition, the embodiments according to the inventive concept are not limited to these specific embodiments, and it should be understood that the present invention includes all replacement forms, equivalent forms and alternative forms that fall within the thought and technical scope of the present invention.

[0033] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, the corresponding elements should not be understood to be limited to these terms, which are only used to distinguish one element from another element. For example, within the scope defined by the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0034] It will be understood that when a component is referred to as being "connected to" or "coupled to" another component, it may be directly connected to or coupled to the other component, or there may be intervening components. Conversely, when a component is referred to as being "directly connected to" or "directly coupled to" another component, there are no intervening components. Other terms describing the relationship between components (e.g., "between" and "directly between" or "immediately adjacent to" and "directly adjacent to") must be interpreted in the same manner.

[0035] Where possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts. The terms used in this specification are provided only to explain specific embodiments and are not intended to limit the present invention. Singular representations may include plural representations unless they represent a completely different meaning from the context. It will also be understood that when the terms "comprises", "comprising", etc. are used in this specification, it is indicated that the components, steps, operations and / or elements are present, but the presence or addition of one or more other components, steps, operations and / or elements is not excluded.

[0036] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0037] The dry electrode can be manufactured from a dry electrode mixture and a current collector without a solvent. The dry electrode mixture M is a mixture containing an electrode active material, a conductive agent (conductive additive or conductive material) and a binder. The dry electrode mixture M may further contain additives.

[0038] The dry electrode can be a cathode or an anode. In some embodiments, when a cathode is manufactured, the electrode active material comprises a cathode active material. As a non-limiting example, the cathode active material may include LCO (LiCoO 2 )、NCM(Li(Ni,Co,Mn)O 2 )、NCA(Li(Ni,Co,Al)O 2 )、LMO(LiMnO 4 )、LFP(LiFePO 4 ) or sulfur.

[0039] In some embodiments, when manufacturing the anode, the electrode active material comprises an anode active material. For example, the anode active material may include natural graphite, artificial graphite, mesocarbon microbeads (MCMB) or silicon-based materials.

[0040] The conductive agent may include a carbon-based material. For example, the conductive agent may include carbon black, acetylene black, carbon fiber, or carbon nanotube.

[0041] The binder may include polymer-based chemicals such as polyvinylidene fluoride (PVDF), polyvinyl alcohol (PVA), polytetrafluoroethylene (PTFE), styrene-butadiene rubber (SBR), carboxymethyl cellulose (CMC), or polyacrylonitrile (PAN).

[0042] A solid polymer electrolyte such as poly(ethylene oxide) (PEO), an oxide-based solid electrolyte, or a sulfide-based solid electrolyte may be partially used as an additive.

[0043] The dry electrode mixture may include 70 wt % to 99.9 wt % of an electrode active material, 0.1 wt % to 20 wt % of a conductive agent, and 0.1 wt % to 20 wt % of a binder, and 0 wt % to 20 wt % of an additive may be added thereto.

[0044] like Figure 1 As shown, the dry electrode mixture M is manufactured into a dry electrode film F through a series of film-making processes under heat and pressure. First, the dry electrode mixture M containing electrode active materials, conductive agents and binders is mixed at a predetermined speed by a mixer 10 for a predetermined time. As a non-limiting example, the dry electrode mixture can be manufactured by using a rotating high shear mixer or a fluid mixer using air, and the predetermined time and speed can be adjusted by changing the rotation speed and operation time of the mixer 10. As another non-limiting example, a compactor, a granulator or a combination thereof can be used to manufacture the dry electrode mixture.

[0045] The mixed dry electrode mixture M can first be pressed by the upstream roller press 20 to form a film. The upstream roller press 20 provides a pressing force while rotating, so that the dry electrode mixture M is formed into a film. The dry electrode mixture M initially formed into a film can be further pressed by the downstream roller press 30, and its thickness can be adjusted by pressing. The dry electrode mixture (i.e., dry electrode film F) formed into a film is wound by a winder 40. Subsequently, the dry electrode film F can be bonded to or laminated to the collector to manufacture a dry electrode. The manufacture of the dry electrode film and its lamination on the collector can be carried out in one device, or can be carried out in different devices.

[0046] In the process of manufacturing the dry electrode, the mixer 10 may be used to mix the dry electrode mixture M. In some embodiments, the electrode active material and the conductive agent may be dispersed, and the binder may be introduced so that the dry electrode mixture M may be dispersed during the mixing process. In some embodiments, the electrode active material, the conductive agent, and the binder may be introduced, and the dry electrode mixture M may be dispersed.

[0047] In some embodiments, the mixer 10 can be a spiral mixer, a vertical mixer, a horizontal mixer, an oblique mixer, a planetary mixer, a paddle mixer, a screw mixer, an electric mixer, a granulator, a jet mill or a compactor. In some embodiments, two or more mixers selected from the above mixers can be used for mixing. However, the mixer 10 is not limited to these examples.

[0048] As mixing conditions, a temperature between -20 degrees Celsius and 200 degrees Celsius may be used. In some embodiments, the mixer 10 may further include a cooler to ensure that a low temperature state is maintained during the mixing process.

[0049] When the binder in the material gains enough energy through mixing to become fibrous, the fibrous binder can connect the active material, conductive agent, and additive in the form of a grid, thereby completing the mixing process.

[0050] After the mixing is completed, the dry electrode mixture M is transported to the next step for film making. As needed, the transportation of the dry electrode mixture M can be completed by a crane, a bogie, a conveyor, a vacuum device, etc. The transported dry electrode mixture M can be stored in a hopper and supplied to a roller press by a feeder. For example, the feeder can be a screw feeder, a chain conveyor feeder, a belt feeder, a brush feeder, or a disc feeder.

[0051] In the manufacture of the dry electrode, the feeding technology of the dry electrode mixture M supplied between the rollers of the upstream roller press 20 is very important. In order to achieve the improvement of the quality of the dry electrode and the high-speed manufacture of the dry electrode, the fed dry electrode mixture M must be immediately introduced between the rollers 20a and 20b to form a thin film, rather than accumulating the dry electrode mixture M between the rollers 20a and 20b of the upstream roller press 20 to form a thin film. However, due to the characteristics of the dry electrode mixture M (which exhibits high agglomeration and low fluidity), the technology of uniformly moving the dry electrode mixture between the rollers 20a and 20b is very difficult.

[0052] exist Figure 2 , a feed zone FZ is shown, which is arranged between the roller 20a and the roller 20b of the upstream roller press 20 and into which the dry electrode mixture M is supplied (in Figure 2, x represents the horizontal direction, and y represents the vertical direction). When the dry electrode mixture M is introduced between the roller 20a and the roller 20b while the dry electrode mixture M is accumulated in the feed zone FZ, a large amount of powder can be introduced at the same time, so that the manufactured dry electrode film F can be made thicker. In addition, if the rotation speed of the rollers 20a and 20b increases, the quality of the dry electrode film F may deteriorate.

[0053] In addition, reference Figure 3 Since the dry electrode mixture M is characterized by high agglomeration, when the rollers 20 a and 20 b rotate while the dry electrode mixture is accumulated in the feed zone FZ, the pressure caused by the accumulated state may form a bridge, thereby possibly interrupting the supply of the dry electrode mixture M. In addition, even in a state where the dry electrode mixture is accumulated in the hopper before feeding, the dry electrode mixture M may agglomerate, thereby possibly forming a bridge.

[0054] Due to high agglomeration and low fluidity of the dry electrode mixture M, even if the dry electrode mixture is transported through a tube, there are problems such as the dry electrode mixture M agglomerating in the tube and clogging the tube.

[0055] Therefore, the present invention provides a dry electrode mixture feeding system, which can solve the problems caused by the high agglomeration and low fluidity of the dry electrode mixture by mixing the dry electrode mixture M with a fluid using fluidization so that the dry electrode mixture M moves like a liquid or a gas. In addition, the present invention provides a method for manufacturing a dry electrode for a battery by a manufacturing process using the feeding system, and a dry electrode manufactured thereby.

[0056] like Figure 4 As shown, the fluidization device 100 according to the present invention can mix the dry electrode mixture M supplied thereto with a fluid (eg, air) to fluidize the dry electrode mixture. In the fluidized state, the dry electrode mixture M does not show high agglomeration and low fluidity.

[0057] In the embodiment, the dry electrode mixture M introduced into the fluidization device 100 is in a state of particle complexation. The state of particle complexation refers to a state in which the components constituting the dry electrode mixture M are blended to a certain extent. That is, if the components of the dry electrode mixture M (i.e., electrode active materials, conductive agents, and binders) are simply mixed, they may be separated from each other due to density differences. On the other hand, the state of particle complexation refers to a state in which the conductive agent and the binder are attached to the surface of the electrode active material.

[0058] The fluidizing device 100 may be disposed upstream of the upstream roller press 20. The dry electrode mixture M that has been deagglomerated by the fluidizing device 100 may be introduced into the upstream roller press 20 directly or through a feeder.

[0059] In an embodiment of the present invention, the fluidization device 100 includes a housing 102 and an openable cover 104. The shape of the housing 102 of the device 100 is not limited, but preferably extends vertically without an angle. In some embodiments, a sealing member may be arranged between the housing 102 and the cover 104. The sealing member can prevent possible wear at the interface between the housing 102 and the cover 104, and can prevent gas from leaking from the inside.

[0060] The chamber 106 is formed in the housing 102 . In the chamber 106 , the dry electrode mixture M and the fluid may be mixed. In particular, the chamber 106 may have a vertical structure. The vertical chamber 106 may prevent the above-mentioned bridge phenomenon. The dry electrode mixture M may be supplied to the upper side of the housing 102 .

[0061] The chamber 106 includes an inlet 108 and an outlet 110. The fluid can be supplied to the chamber 106 through the inlet 108, and the fluid in the chamber 106 can be discharged through the outlet 110. For example, the fluid can be air. As another non-limiting example, the fluid can be a non-reactive gas or an inert gas. As another non-limiting example, nitrogen (N 2 As another non-limiting example, when the electrode material includes a solid electrolyte, the fluid may be argon.

[0062] The fluid introduced into the housing 102 through the inlet 108 is supplied to the conduit 114, which is a space in the cover 104. The fluid stays in the conduit 114 for a moment before passing through the distribution plate 112 arranged between the cover 104 and the housing 102. In particular, the distribution plate 112 can be arranged at the cover 104. The distribution plate 112 can be arranged at the interface between the cover 104 and the housing 102. The fluid supplied to the conduit 114 can be divided when passing through the distribution plate 112, and can be introduced into the chamber 106. The fluid introduced into the chamber 106 can be mixed with the dry electrode mixture M when flowing through the dry electrode mixture M, and any remaining fluid can be discharged from the chamber 106 through the outlet 110.

[0063] like Figure 5 As shown, the cover 104 is configured to be openable. After the dry electrode mixture M is fluidized, the cover 104 is opened to allow the fluidized dry electrode mixture M to be supplied to the feeding device 260 or the upstream roller press 20.

[0064] The cover 104 may be opened at a predetermined time point. For example, after it is determined that the fluidization of the dry electrode mixture M has been completed after a predetermined time, the cover 104 may be opened.

[0065] refer to Figures 6 to 9To this end, according to an embodiment of the present invention, the fluidizing device 100 may be provided with a clamp 116 configured to fasten the housing 102 and the cover 104 to each other. A cylinder 118 may be connected to the clamp 116 to unlock the clamp 116. As a non-limiting example, an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder may be used as the cylinder 118.

[0066] During operation of the fluidization device 100, Figure 7 The clamp 116 shown in the locked state can be unlocked by operation of the cylinder 118 after fluidization is completed, as shown in FIG. Figure 8 As shown. Fig. 9 As shown, when the clamp 116 is unlocked, the cover 104 can be fully opened due to the weight of the cover 104. The chamber 106 closed by the housing 102 and the cover 104 can communicate with the outside through the cover 104. The opening of the cover 104 is achieved without resistance from the motor 120, and no current is supplied to the motor 120. Since no current is supplied to the motor 120 at this time, the cover 104 can be opened by about 90° to less than 120°.

[0067] refer to Fig.10 and Fig.11 In an embodiment, the closing of the cover 104 can be achieved by the operation of the motor 120. When the motor 120 is operated, the cover 104 rotates upward. In an embodiment, when the position sensor arranged at the clamp 116 detects the initial position of the cover, the cylinder 118 can be operated. The cylinder 118 can switch the clamp 116 to a locked state when the clamp 116 moves upward.

[0068] like Fig.12 As shown, the feeding system 200 according to the present invention may include the fluidizing device 100. The feeding system 200 may further include an upstream hopper 220, a metering feeder 230, and a downstream hopper 240 disposed at the frame 210.

[0069] The dry electrode mixture M delivered from the mixer 10 is stored in the upstream hopper 220. A predetermined amount of the stored dry electrode mixture M is supplied to the downstream hopper 240 by the metering feeder 230. When the amount of the dry electrode mixture M supplied to the downstream hopper 240 reaches a predetermined amount, the operation of the metering feeder 230 is stopped. In an embodiment, the downstream hopper 240 may include a weighing sensor 250 configured to measure the weight of the supplied dry electrode mixture M. Based on the weight measured by the weighing sensor 250, the operation of the metering feeder 230 may be stopped.

[0070] A predetermined amount of the dry electrode mixture M supplied to the downstream hopper 240 may be supplied to the fluidizing device 100. Supplying a predetermined amount of the dry electrode mixture M to the fluidizing device 100 is intended to control the amount of fluid supplied to the fluidizing device 100. The amount of air required by the fluidizing device 100 depends on the amount of the dry electrode mixture M. Therefore, when a predetermined amount of the dry electrode mixture M is supplied, the amount of air and the dry electrode mixture M to be fluidized in the fluidizing device 100 may be adjusted to be uniform.

[0071] The dry electrode mixture M fluidized by the fluidizing device 100 may be directly introduced into the upstream roller press 20, or may be introduced into the upstream roller press 20 through a separate feeding device 260. After passing through the upstream roller press 20, the dry electrode film F may be further pressed and laminated to be manufactured into a dry electrode, and finally manufactured into a battery, as shown in reference Figure 1 described.

[0072] According to the present invention, a plurality of fluidizing devices 100 may be used. For example, two or more fluidizing devices 100 may be arranged in parallel so that the fluidized dry electrode mixture M may be continuously used for film formation during a high-speed process. Since a time difference may occur during the fluidization of the dry electrode mixture M in one fluidizing device 100, the dry electrode mixture M fluidized by another fluidizing device 100 arranged in parallel may be used for film formation.

[0073] According to the present invention, it is possible to provide a fluidizing device capable of preventing problems in a feeding area caused by high agglomeration and low fluidity of a dry electrode mixture, and a feeding system including the same.

[0074] The feed system according to the present invention can use a plurality of feed devices that cannot be used due to powder characteristics, and can perform high-speed film production and quality control.

[0075] Although the fluidizing apparatus according to the present invention is described above as being used to form a dry electrode mixture into a thin film, the fluidizing apparatus may be used for other materials that exhibit high agglomeration and low fluidity and need to be formed into a thin film in addition to the dry electrode mixture.

[0076] As apparent from the above, according to the present invention, there is provided a fluidizing device and a feeding system including the fluidizing device, which are capable of facilitating the feeding of a dry electrode mixture to a film-forming roller during a film-forming process.

[0077] According to the present invention, there are provided a fluidizing device capable of improving the quality of a dry electrode formed into a thin film and performing a film forming process at a high speed, and a feeding system including the fluidizing device.

[0078] According to the present invention, a battery manufacturing system including the fluidization device is provided.

[0079] According to the present invention, a method for manufacturing a battery including a fluidization process is provided.

[0080] The effects of the present invention are not limited to the above effects. It should be understood that the effects of the present invention include all effects that can be inferred from the above description.

[0081] It is obvious to those skilled in the art that the present invention described above is not limited to the above-mentioned embodiments and the accompanying drawings, and various substitutions, modifications and changes may be made without departing from the technical idea of ​​the present invention.

Claims

1. A fluidizing device, the fluidizing device being configured to mix a supplied dry electrode mixture with a fluid to fluidize the dry electrode mixture, and supply the fluidized dry electrode mixture to a film forming device, the fluidizing device comprising: a chamber formed in the housing, the chamber configured to receive a dry electrode mix; an inlet configured to allow fluid to enter the chamber; as well as An outlet is configured to allow fluid in the chamber to be discharged through the outlet.

2. The fluidization device according to claim 1, further comprising: a cover connected to the housing, the cover being configured to open the housing; and A distribution plate is arranged between the housing and the cover.

3. The fluidization device according to claim 2, further comprising: a clamp disposed on the device, the clamp being configured to lock the cover and the housing to each other; and A cylinder is disposed on the device, and is configured to unlock the clamp.

4. The fluidizing device of claim 3, further comprising a motor configured to rotate the cover.

5. The fluidization device according to claim 1, wherein: The housing extends vertically from the cover.

6. The fluidization device according to claim 1, wherein: The fluid includes any one of air, argon, nitrogen, a non-reactive gas and an inert gas.

7. A battery manufacturing system, comprising: a feed device configured to store a dry electrode mixture; and A fluidizing device is configured to receive the dry electrode mixture from the feeding device and mix the dry electrode mixture with a fluid to fluidize the dry electrode mixture.

8. The battery manufacturing system according to claim 7, wherein: The feeding device includes a metering feeder configured to supply a predetermined amount of the dry electrode mixture to the fluidization device.

9. The battery manufacturing system according to claim 7, wherein: The feeding device comprises: an upstream hopper configured to store a dry electrode mixture; a metering feeder configured to discharge a dry electrode mixture from the upstream hopper; a downstream hopper configured to receive a dry electrode mix from the metering feeder; and A load cell is configured to weigh the dry electrode mix supplied to the downstream hopper.

10. The battery manufacturing system according to claim 9, wherein: The fluidization device includes a chamber configured to receive a predetermined amount of a dry electrode mixture, and The chamber includes an inlet and an outlet configured to allow fluid to pass through the chamber.

11. The battery manufacturing system according to claim 7, further comprising a roller press, the roller press comprising a feed area configured to receive the fluidized dry electrode mixture, the roller press configured to press the fluidized dry electrode mixture into a film. 12 . The battery manufacturing system according to claim 11 , further comprising a second feeding device disposed between the roller press and the fluidizing device.

13. The battery manufacturing system according to claim 7, wherein: The dry electrode mixture is a solvent-free mixture of electrode active materials, conductive agents and binders.

14. The battery manufacturing system according to claim 7, further comprising: a mixer configured to mix an electrode active material, a conductive agent, and a binder to produce a dry electrode mixture; and A roll press is configured to form the dry electrode mixture fluidized by the fluidizing device into a thin film.

15. A battery manufacturing method, the battery manufacturing method comprising: mixing an electrode active material, a conductive agent, and a binder using a mixer to produce a dry electrode mixture; mixing the manufactured dry electrode mixture with a fluid using a fluidizing device to fluidize the dry electrode mixture; and The fluidized dry electrode mixture is formed into a dry electrode film using a roll press. 16 . The battery manufacturing method according to claim 15 , further comprising laminating the dry electrode film to a current collector.

17. The battery manufacturing method according to claim 15, wherein: The fluidization device comprises: a chamber formed in the housing, the chamber configured to receive a dry electrode mix; an inlet configured to allow a fluid to enter the chamber through the inlet; and An outlet is configured to allow fluid in the chamber to be discharged through the outlet.

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