Electrode assembly manufacturing apparatus and electrode assembly manufacturing method

Abstract

The present invention relates to an electrode assembly manufacturing apparatus and electrode assembly manufacturing method, which may enhance process efficiency and economic feasibility by reducing films discarded in an electrode assembly manufacturing process. The electrode assembly manufacturing apparatus according to the present invention may comprise: a separator reel unit from which a wound-up separator and protective film may be unwound; a separator supply unit arranged to provide the separator released from the separator reel unit; an electrode supply unit for supplying electrodes to the separator at regular intervals; and a film supply unit arranged to provide the protective film released from the separator reel unit to the electrodes or the separator.

Description

Electrode assembly manufacturing device and electrode assembly manufacturing method

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0133634, filed October 6, 2023, and Korean Patent Application No. 10-2024-0089906, filed July 8, 2024, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to an electrode assembly manufacturing device and an electrode assembly manufacturing method, and more specifically, to an electrode assembly manufacturing device for manufacturing an electrode assembly used in manufacturing a secondary battery capable of being charged and discharged, and an electrode assembly manufacturing method using the same.

[0005] In recent years, rising energy prices due to the depletion of fossil fuels and growing concerns about environmental pollution have made the demand for eco-friendly alternative energy sources essential for future living. Research is continuing into various power generation technologies, such as solar, wind, and tidal power. Furthermore, significant interest is being focused on power storage devices, such as batteries, to more efficiently utilize the generated electrical energy.

[0006] Moreover, with the technological development and increasing demand for battery-powered electronic mobile devices and electric vehicles, the demand for batteries as an energy source is rapidly increasing, and accordingly, much research is being conducted on batteries that can meet various needs.

[0007] Batteries that store electrical energy can generally be divided into primary and secondary batteries. Primary batteries are disposable, consumable batteries, whereas secondary batteries are rechargeable batteries manufactured using materials capable of repeatable oxidation and reduction processes between current and a substance. In other words, when current causes a reduction reaction in a material, the battery is charged, and when an oxidation reaction occurs in the material, the battery is discharged. This repeated charge-discharge cycle generates electricity.

[0008] Secondary batteries can be classified by shape, including cylindrical cells, pouch cells, and prismatic cells. Regardless of their different shapes, manufacturing a secondary battery requires an electrode assembly placed inside an outer case. The electrode assembly may include a positive electrode, a negative electrode, and a separator. The electrode assembly may take various forms, such as a form in which the positive electrode, negative electrode, and separator are wound together or stacked side by side.

[0009] Meanwhile, the separator used in the electrode assembly manufacturing process may be provided in a rolled state together with a protective film, which is then unwound. At this time, the protective film that was rolled together with the separator may be recovered and disposed of. Additionally, another film may be provided when laminating the electrode and separator.

[0010] In the past, the protective film wound together to protect the separator was discarded, and an additional film used in the electrode assembly manufacturing process was provided, which resulted in poor process efficiency and economic feasibility.

[0011] Therefore, there is a need for an electrode assembly manufacturing device and an electrode assembly manufacturing method that can improve the efficiency and economic feasibility of the process by reducing the amount of film discarded in the electrode assembly manufacturing process.

[0012] The object of the present invention is to provide an electrode assembly manufacturing device and an electrode assembly manufacturing method that can improve the efficiency and economic feasibility of the process by reducing the amount of film discarded in the electrode assembly manufacturing process.

[0013] An electrode assembly manufacturing device according to the present invention may include a separator winding unit from which a separator and a protective film in a wound form can be unwound, a separator providing unit provided to provide the separator unwound from the separator winding unit, an electrode supply unit for supplying electrodes to the separator at regular intervals, and a film providing unit provided to provide the protective film unwound from the separator winding unit to the electrode or the separator.

[0014] The electrode may include a first electrode and a second electrode, and the electrode supply unit may further include a first electrode moving unit configured to move the first electrode according to a speed at which the separator is provided by the separator providing unit, and a second electrode moving unit configured to move the second electrode so that the second electrode is positioned on the opposite side of the first electrode based on the separator provided by the separator providing unit.

[0015] The above membrane winding unit may include a first membrane winding unit and a second membrane winding unit that are spaced apart from each other.

[0016] The above separation membrane providing unit may include a first separation membrane providing unit that is provided so that the separation membrane released from the first separation membrane winding unit can be placed on one side of the moving first electrode, and a second separation membrane providing unit that is provided so that the separation membrane released from the second separation membrane winding unit can be placed on one side of the moving second electrode.

[0017] The film providing unit includes a first film providing unit that is provided to be able to place the protective film on one side of the separator coupled to one side of the first electrode, and a second film providing unit that is provided to be able to place the protective film on the other side of the second electrode, and the protective film can be provided to be placed on both sides of the set composed of the first electrode, the second electrode, and the separator.

[0018] The electrode assembly manufacturing device may further include a heater that is provided to apply heat to the assembly having the protective film disposed on both sides.

[0019] The electrode assembly manufacturing device may further include a pressing roll that is provided to press the assembly heated by the heater from both sides to bond the first electrode, the second electrode, and the separator to each other.

[0020] The electrode assembly manufacturing device may further include a film recovery unit provided so that the protective film disposed on both sides of the assembly pressed by the pressure roll can be recovered.

[0021] The film recovery unit may include a first film recovery unit provided so that the protective film provided from the first film providing unit can be recovered, and a second film recovery unit provided so that the protective film provided from the second film providing unit can be recovered.

[0022] The electrode assembly manufacturing device may further include a first film winding unit configured to wind the protective film recovered from the first film recovery unit, and a second film winding unit configured to wind the protective film recovered from the second film recovery unit.

[0023] The electrode assembly manufacturing device may further include a cutting unit that is provided to cut the assembly from which the protective film has been recovered into a preset length.

[0024] The above film providing unit may include a plurality of film rolls that are provided to guide the protective film released from the separator winding unit through rotation.

[0025] The above film roll may be arranged so that the direction of movement of the protective film can be changed.

[0026] The electrode assembly manufacturing device may further include a first electrode cutter provided to cut the first electrode moved by the first electrode moving unit to a preset length, and a second electrode cutter provided to cut the second electrode moved by the second electrode moving unit to a preset length.

[0027] A method for manufacturing an electrode assembly according to the present invention is a method for manufacturing an electrode assembly including a first electrode, a second electrode, and a separator, the method comprising: a step of laminating a separator provided from a separator winding unit in which a separator and a protective film are wound between the moving first electrode and the second electrode; a step of laminating the protective film provided from the separator winding unit so as to be disposed on an outer surface of an assembly in which the first electrode, the second electrode, and the separator are laminated; a step of laminating the assembly covered with the protective film; and a step of recovering the protective film disposed on the outer surface of the laminated assembly.

[0028] According to a preferred embodiment of the present invention, the film wound together with the separator can be reused, thereby reducing the amount of film discarded.

[0029] Through this, the efficiency and economy of the electrode assembly manufacturing process can be improved.

[0030] Additionally, it can be applied to manufacturing various types of electrode assemblies while minimizing equipment replacement.

[0031] In addition, damage to the electrode and separator can be prevented during the electrode assembly manufacturing process.

[0032] The effects according to the present invention are not limited to the contents exemplified above, and more diverse effects are included in this specification.

[0033] FIG. 1 is a perspective view schematically illustrating an electrode assembly manufacturing device according to Example 1 of the present invention.

[0034] FIG. 2 is a side view schematically illustrating an electrode assembly manufacturing device according to Example 1 of the present invention.

[0035] FIG. 3 is a side view schematically illustrating an electrode assembly manufacturing device according to Example 2 of the present invention.

[0036] Figure 4 is a flowchart schematically illustrating a method for manufacturing an electrode assembly according to Example 3 of the present invention.

[0037] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the invention. However, the present invention may be implemented in various different forms and is not limited or restricted by the following examples.

[0038] In order to clearly explain the present invention, a detailed description of a part that is irrelevant to the description or a related known technology that may unnecessarily obscure the gist of the present invention has been omitted, and when adding reference signs to components of each drawing in this specification, the same or similar reference signs are attached to the same or similar components throughout the specification.

[0039] In addition, terms or words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0040] Example 1

[0041] Fig. 1 is a perspective view schematically illustrating an electrode assembly manufacturing device (10) according to Embodiment 1 of the present invention, and Fig. 2 is a side view schematically illustrating an electrode assembly manufacturing device (10) according to Embodiment 1 of the present invention. At this time, the transfer unit (330) is not illustrated in Fig. 1.

[0042] The electrode assembly manufacturing device (10) according to the present invention may refer to a device for manufacturing an electrode assembly used in the manufacture of a secondary battery capable of being charged and discharged. That is, the electrode assembly manufacturing device (10) may refer to a device for manufacturing an electrode assembly including a positive electrode, a negative electrode, and a separator. Here, when manufacturing a secondary battery, the electrode assembly may be arranged in a form accommodated inside an outer case. Specifically, the electrode assembly and an electrolyte may be accommodated inside the outer case, and the outer case may be sealed, thereby manufacturing a secondary battery.

[0043] In addition, the electrode assembly manufacturing device (10) according to Example 1 of the present invention may refer to a device for manufacturing a laminate of electrodes and separators required in a process of manufacturing an electrode assembly in which a plurality of electrodes and separators are laminated. The form of the electrode assembly manufacturing device (10) according to Example 1 is merely an example, and can be applied to various forms of electrode assembly manufacturing processes.

[0044] Referring to FIGS. 1 and 2, the electrode assembly manufacturing device (10) according to Example 1 of the present invention may include a separator winding unit (100), a separator providing unit (200), a film providing unit (300), and an electrode supply unit (400).

[0045] The membrane winding unit (100) may include a membrane (S) and a protective film (F) in a wound form. Specifically, the membrane winding unit (100) may be in a form in which a protective film (F) is wound together with the membrane (S) and is disposed on the surface of the membrane (S) to protect the membrane (S). That is, the membrane winding unit (100) may be in a roll form in which a sheet-shaped membrane (S) and a protective film (F) are wound.

[0046] The membrane providing unit (200) can guide the transport of the membrane (S) released from the membrane winding unit (100). In other words, the membrane providing unit (200) can be arranged so that the membrane (S) released from the membrane winding unit (100) is provided to an electrode to be described later.

[0047] For example, the membrane providing unit (200) can guide the transport direction of the membrane (S) toward the electrode. As a result, the membrane (S) can be provided to the electrode. At this time, in the present embodiment, the driving force for unwinding and transporting the membrane (S) in the membrane winding unit (100) may be the force provided by the transport unit (330) described later, but is not limited thereto. For example, the driving force for transporting the membrane (S) may also be generated in the membrane providing unit (200).

[0048] The electrode supply unit (400) can supply electrodes to the separator (S) at regular intervals. The electrodes can include a first electrode (A) and a second electrode (C). Here, the first electrode (A) and the second electrode (C) can be a cathode or an anode. The method by which the electrode supply unit (400) supplies the electrodes can be varied, and in the present invention, a form in which the electrode supply unit (400) supplies and moves the electrodes using a conveyor belt is described as an example.

[0049] Conventionally, a film wound together with the separator (S) to protect the separator (S) was discarded after being unwound to provide the separator (S). Therefore, a process for recovering the film was required, reducing the efficiency of the process, and the economic feasibility of the process was also reduced due to the discarded film.

[0050] As an example of a configuration for preventing the film from being discarded, the electrode assembly manufacturing device (10) according to Example 1 of the present invention may include a film providing unit (300).

[0051] The film providing unit (300) can guide the protective film (F) unwound from the separator winding unit (100). Specifically, the film providing unit (300) can be provided so that the protective film (F) unwound from the separator winding unit (100) is provided to the electrode or the separator (S). That is, in the electrode assembly manufacturing device (10) according to Embodiment 1 of the present invention, the protective film (F) wound together with the separator (S) can be guided toward the electrode or the separator (S) through the film providing unit (300) to protect the separator (S). The protective film (F) provided to the electrode or the separator (S) can prevent damage and sagging of the electrode and the separator (S) during the electrode assembly manufacturing process. At this time, in the present embodiment, the driving force for unwinding and transporting the protective film (F) in the separator winding unit (100) may be a force provided by the transport unit (330) described below, but is not limited thereto. For example, the driving force for transporting the protective film (F) may be generated by the film supply unit (300).

[0052] Below, the shape of each configuration is described in detail.

[0053] The electrode supply unit (400) of the electrode assembly manufacturing device (10) may include a first electrode moving unit (410) and a second electrode moving unit (420). The first electrode moving unit (410) may be provided to move the first electrode (A) at a speed at which the separator (S) is provided by the separator providing unit (200). In addition, the second electrode moving unit (420) may be provided to move the second electrode (C) so that the second electrode (C) is disposed on the opposite side of the first electrode (A) based on the separator (S) provided by the separator providing unit (200). That is, the separator (S) may be disposed between the first electrode (A) and the second electrode (C). Specifically, the assembly including the first electrode (A), the second electrode (C), and the separator (S) may move in a state in which the separator (S) is disposed between the first electrode (A) and the second electrode (C).

[0054] The moving electrode can be cut to a preset length and then moved together with the separator (S). Here, in order to cut the moving electrode to the preset length, the electrode assembly manufacturing device (10) may further include a first electrode cutter (401) and a second electrode cutter (402). Specifically, the first electrode cutter (401) can cut the first electrode (A) moved by the first electrode moving unit (410) to the preset length. In addition, the second electrode cutter (402) can cut the second electrode (C) moved by the second electrode moving unit (420) to the preset length. At this time, the manner in which the first electrode cutter (401) and the second electrode cutter (402) cut the electrode may vary.

[0055] The membrane winding unit (100) may include a first membrane winding unit (110) and a second membrane winding unit (120) that are spaced apart from each other. In the present invention, an example in which the second membrane winding unit (120) is positioned on the opposite side of the first membrane winding unit (110) with respect to the moving first electrode (A) is described.

[0056] The first membrane providing unit (210) may be provided to provide the membrane (S) unwound from the first membrane winding unit (110) so as to be disposed on one side of the first electrode (A) on which the membrane (S) moves. In addition, the second membrane providing unit (220) may be provided to provide the membrane (S) unwound from the second membrane winding unit (120) so as to be disposed on one side of the second electrode (C) on which the membrane (S) moves. Specifically, the membrane (S) unwound from the first membrane winding unit (110), the first electrode (A), the membrane (S) unwound from the second membrane winding unit (120), and the second electrode (C) may be stacked in this order. As an example, the first and second membrane providing units (210, 220) may include guide rollers, but the configuration of the membrane providing unit (200) is not limited thereto.

[0057] As described above, in order to protect the assembly in which the separator (S), the first electrode (A), and the second electrode (C) are laminated, the film providing unit (300) of the electrode assembly manufacturing device (10) according to Example 1 of the present invention can provide the assembly with a protective film (F) unwound from the separator winding unit (100).

[0058] In this regard, the film providing unit (300) may include a first film providing unit (310) and a second film providing unit (320). The first film providing unit (310) may provide the protective film (F) so that the protective film (F) is disposed on one surface of the separator (S) bonded to one surface of the first electrode (A). In addition, the second film providing unit (320) may provide the protective film (F) so that the protective film (F) is disposed on the other surface of the second electrode (C).

[0059] Accordingly, the protective film (F) may be provided to be disposed on both sides of the set composed of the first electrode (A), the second electrode (C), and the separator (S). Specifically, the separator (S) disposed on one side of the first electrode (A) may have the protective film (F) disposed on the other side, and the first electrode (A) disposed on one side. In addition, the second electrode (C) may have the separator (S) disposed on one side, and the protective film (F) disposed on the other side.

[0060] During the electrode assembly manufacturing process, a protective film (F) is placed on both sides of the assembly composed of a first electrode (A), a second electrode (C), and a separator (S), thereby preventing the electrodes and the separator (S) from being damaged. In addition, since the shape of the assembly is maintained through the protective film (F), the phenomenon of the electrodes and the separator (S) sagging during the manufacturing process can be prevented.

[0061] The first film providing unit (310) and the second film providing unit (320) of the film providing unit (300) may each include a plurality of film rolls (301). The film rolls (301) may change the transport direction of the protective film (F). For example, the film rolls (301) may have a cylindrical shape.

[0062] The laminating process for manufacturing an electrode assembly comprising a first electrode (A), a second electrode (C), and a separator (S) may require heat and pressure.

[0063] To provide the heat required for the laminating process, the electrode assembly manufacturing device (10) may further include a heater (500). The heater (500) may be configured to apply heat to a set having a protective film (F) disposed on both sides. Specifically, the heaters (500) may be configured in pairs and disposed on each side of the moving set.

[0064] To provide the pressure required for the laminating process, the electrode assembly manufacturing device (10) may further include a pressure roll (600). The pressure roll (600) may be configured to apply pressure to the assembly heated by the heater (500). Specifically, the pressure rolls (600) may be configured in pairs and positioned on each side of the moving assembly. In addition, the pressure roll (600) may be a roughly cylindrical roll that applies pressure to the assembly by rotation. This is merely an example, and the pressure roll (600) may apply pressure to the assembly in other ways.

[0065] After the assembly is laminated by the heater (500) and the pressure roll (600), the protective film (F) disposed on both sides of the assembly is no longer necessary and can be recovered. As an example of a configuration for recovering the protective film (F), the electrode assembly manufacturing device (10) according to Embodiment 1 of the present invention may further include a film recovery unit (700). Specifically, the film recovery unit (700) may be provided so that the protective film (F) disposed on both sides of the assembly pressed by the pressure roll (600) is recovered.

[0066] The film recovery unit (700) may include a first film recovery unit (710) and a second film recovery unit (720). The first film recovery unit (710) may recover a protective film (F) provided from the first film providing unit (310), and the second film recovery unit (720) may recover a protective film (F) provided from the second film providing unit (320). Accordingly, the heater (500), the pressure roll (600), and the film recovery unit (700) may be sequentially arranged along the direction in which the assembly moves.

[0067] As an example of a configuration for rewinding the protective film (F) recovered through the film recovery unit (700), the electrode assembly manufacturing device (10) according to Embodiment 1 of the present invention may further include a first film winding unit (810) and a second film winding unit (820). The first film winding unit (810) may wind the protective film (F) recovered from the first film recovery unit (710), and the second film winding unit (820) may wind the protective film (F) recovered from the second film recovery unit (720).

[0068] The assembly with the protective film (F) disposed on both sides removed can be cut to a preset length. As an example of a configuration for cutting the assembly, the electrode assembly manufacturing device (10) according to Embodiment 1 of the present invention can further include a cutting unit (900). After the protective film (F) is recovered from the film recovery unit (700) of the cutting unit (900), the assembly can be cut to a preset length.

[0069] One or more of the parts of the set cut to a predetermined length by the cutting unit (900) can be gathered together to form an electrode assembly.

[0070] The electrode assembly manufacturing device (10) according to Example 1 of the present invention can reduce the amount of discarded protective film (F) by reusing the protective film (F) wound together with the separator (S). This can improve the efficiency and economy of the electrode assembly manufacturing process. In addition, since the process for discarding the protective film (F) is omitted, the electrode assembly manufacturing device (10) can be applied while minimizing equipment replacement when manufacturing various types of electrode assemblies. In addition, the electrode assembly manufacturing device (10) can efficiently prevent damage to the electrode and separator (S) in the electrode assembly manufacturing process.

[0071] Meanwhile, the electrode assembly manufacturing device (10) according to Example 1 of the present invention may include a transport unit (330). The transport unit (330) may be configured to transport an electrode, a separator, and / or a protective film.

[0072] In the present embodiment, the transport unit (330) may be configured as a conveyor belt provided along the transport direction of the electrodes, separators, and / or protective films. The transport unit (330) may be provided symmetrically with the electrodes, separators, and / or protective films interposed therebetween. However, the specific configuration of the transport unit (330) is not particularly limited as long as it can transport the electrodes, separators, and / or protective films.

[0073] Example 2

[0074] FIG. 3 is a side view schematically illustrating an electrode assembly manufacturing device (10') according to Example 2 of the present invention.

[0075] Hereinafter, a detailed description of the same configuration as that of the electrode assembly manufacturing device (10) according to Example 1 of the present invention will be omitted, and the differences will be mainly described.

[0076] The electrode assembly manufacturing device (10') according to Example 2 of the present invention may differ from the electrode assembly manufacturing device (10) according to Example 1 of the present invention in the presence or absence of a configuration for additionally supplying a second electrode (C, C').

[0077] Referring to FIG. 3, the electrode assembly manufacturing device (10') according to the second embodiment of the present invention can supply second electrodes (C, C') such that a separator (S) is disposed on both sides of a first electrode (A), and the second electrodes (C, C') are disposed on opposite sides of the first electrode (A) based on the separators (S) on both sides. Specifically, referring to FIG. 3, the second electrode supply unit (420) can provide and move the second electrode (C) from above the first electrode (A), and the second electrode supply unit (420') can provide and move the second electrode (C') from below the first electrode (A). In addition, the electrode assembly manufacturing device (10') can further include a second electrode cutter (402') for cutting the second electrode (C').

[0078] The assembly existing between the manufacturing processes by the electrode assembly manufacturing device (10') according to Example 2 of the present invention may be composed of two separators (S), one first electrode (A), and two second electrodes (C, C').

[0079] In this way, by changing some of the configurations of the electrode assembly manufacturing device according to the present invention, the assembly used for manufacturing the electrode assembly can be configured in various ways.

[0080] Example 3

[0081] Figure 4 is a flowchart schematically illustrating a method for manufacturing an electrode assembly according to Example 3 of the present invention.

[0082] Below, detailed descriptions of parts that can be understood based on the descriptions in Embodiments 1 and 2 of the present invention are omitted.

[0083] The method for manufacturing an electrode assembly according to Example 3 of the present invention may include a step of laminating a separator (S) between a moving first electrode (A) and a second electrode (C). Specifically, the method for manufacturing an electrode assembly may include a step (S1) of laminating a separator (S) provided from a separator winding unit (100) on which a separator (S) and a protective film (F) are wound, between the moving first electrode (A) and the second electrode (C). Accordingly, the first electrode (A) and the second electrode (C) can be physically separated from each other via the separator (S).

[0084] The electrode assembly manufacturing method may include a step (S2) of laminating a protective film (F) provided from a separator winding unit (100) so as to be disposed on the outer surface of a set in which a first electrode (A), a second electrode (C), and a separator (S) are laminated.

[0085] In this regard, when the separator winding unit (100) is released, the separator (S) is provided, and the protective film (F) can be released together with the separator (S). At this time, the protective film (F) released together with the separator (S) can be placed on the outer surface of the assembly in order to protect the assembly in which the first electrode (A), the second electrode (C), and the separator (S) are laminated. Specifically, the protective film (F) can be placed on both sides of the assembly.

[0086] To combine the first electrode (A), the second electrode (C), and the separator (S), the electrode assembly manufacturing method may include a step (S3) of laminating the assembly covered with a protective film (F). At this time, heat and pressure may be applied to laminate the assembly. Here, the protective film (F) disposed on both sides of the assembly can prevent damage to the assembly due to heat and pressure.

[0087] The method for manufacturing an electrode assembly may include a step (S4) of recovering a protective film (F) disposed on both sides of the assembly after the assembly has been laminated. After the protective film (F) has been recovered, the assembly may be cut to a predetermined length, and one or more portions of the cut assembly may be assembled to manufacture an electrode assembly.

[0088] The electrode assembly manufacturing method according to Example 3 of the present invention allows the protective film (F) wound together with the separator (S) to be reused during the manufacturing process for the protection of the assembly without being discarded. Therefore, the efficiency and economic feasibility of the electrode assembly manufacturing process can be improved through the electrode assembly manufacturing method.

[0089] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and various embodiments are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0090] [Explanation of symbols]

[0091] 10, 10': Electrode assembly manufacturing device

[0092] 100: Membrane winding part

[0093] 110: First membrane winding section

[0094] 120: Second membrane winding section

[0095] 200: Membrane providing unit

[0096] 210: First membrane providing unit

[0097] 220: Second membrane providing unit

[0098] 300: Film Provider

[0099] 301: Film roll

[0100] 310: First Film Provider

[0101] 320: Second Film Provider

[0102] 330: Transport section

[0103] 400, 400': Electrode supply

[0104] 401: First electrode cutter

[0105] 402, 402': Second electrode cutter

[0106] 410: First electrode moving part

[0107] 420, 420': Second electrode moving part

[0108] 500: Heater

[0109] 600: Pressurized roll

[0110] 700: Film recovery unit

[0111] 710: First film recovery unit

[0112] 720: Second Film Recovery Unit

[0113] 810: First film winding section

[0114] 820: Second film winding unit

[0115] 900: Cutting section

[0116] A: First electrode

[0117] C, C': Second electrode

[0118] F: Protective film

[0119] S: Membrane

Claims

1. A membrane winding unit from which a membrane and a protective film in a wound form can be unwound; A membrane providing unit provided to provide the membrane that is unwound from the membrane winding unit; An electrode supply unit for supplying electrodes to the above separator at regular intervals; An electrode assembly manufacturing device including a film providing unit that is provided to provide the protective film released from the separator winding unit to the electrode or the separator.

2. In paragraph 1, The above electrode includes a first electrode and a second electrode, The above electrode supply unit, A first electrode moving unit provided to move the first electrode according to the speed at which the separator is provided by the separator providing unit; and An electrode assembly manufacturing device further comprising a second electrode moving unit that is provided to move the second electrode so that the second electrode is positioned opposite the first electrode based on the separator provided by the separator providing unit.

3. In paragraph 2, The above membrane winding part, An electrode assembly manufacturing device comprising a first separator winding unit and a second separator winding unit that are spaced apart from each other.

4. In paragraph 3, The above separation membrane providing unit, A first separator providing unit provided so that the separator released from the first separator winding unit can be placed on one side of the first electrode; and An electrode assembly manufacturing device including a second separator providing unit that is provided so that the separator released from the second separator winding unit can be placed on one side of the second electrode.

5. In paragraph 4, The above film provider, A first film providing unit provided to enable the protective film to be placed on one side of the separator bonded to one side of the first electrode; and Including a second film providing unit that is provided so that the protective film can be placed on the other surface of the second electrode, An electrode assembly manufacturing device, wherein the protective film is provided to be placed on both sides of an assembly composed of the first electrode, the second electrode, and the separator.

6. In paragraph 5, An electrode assembly manufacturing device further comprising a heater that is arranged to apply heat to the assembly on which the protective film is disposed on both sides.

7. In paragraph 6, An electrode assembly manufacturing device further comprising a pressing roll that is provided to pressurize the assembly heated by the heater from both sides to bond the first electrode, the second electrode, and the separator to each other.

8. In paragraph 7, An electrode assembly manufacturing device further comprising a film recovery unit provided so that the protective film disposed on both sides of the assembly pressed by the pressure roll can be recovered.

9. In paragraph 8, The above film recovery unit, A first film recovery unit provided so that the protective film provided from the first film providing unit can be recovered; and An electrode assembly manufacturing device comprising a second film recovery unit provided so that the protective film provided from the second film providing unit can be recovered.

10. In paragraph 9, A first film winding unit provided to wind the protective film recovered from the first film recovery unit; and An electrode assembly manufacturing device further comprising a second film winding unit configured to wind the protective film recovered from the second film recovery unit.

11. In paragraph 8, An electrode assembly manufacturing device further comprising a cutting unit that is provided to cut the above-described assembly from which the above-described protective film has been recovered into a preset length.

12. In paragraph 1, The above film provider, An electrode assembly manufacturing device comprising a plurality of film rolls arranged to guide the protective film released from the separator winding section through rotation.

13. In paragraph 12, The above film roll, An electrode assembly manufacturing device, which is provided so as to change the direction of movement of the above protective film.

14. In paragraph 2, A first electrode cutter provided to cut the first electrode moved by the first electrode moving unit to a preset length; and An electrode assembly manufacturing device further comprising a second electrode cutter configured to cut the second electrode moved by the second electrode moving unit to a preset length.

15. In a method for manufacturing an electrode assembly, the method comprises manufacturing an electrode assembly including a first electrode, a second electrode, and a separator. A step of laminating the separator provided from a separator winding unit in which the separator and protective film are wound between the moving first electrode and the second electrode; A step of laminating the protective film provided from the separator winding unit so as to be placed on the outer surface of the set in which the first electrode, the second electrode, and the separator are laminated; A step of laminating the above set covered with the above protective film; and A method for manufacturing an electrode assembly, comprising the step of recovering the protective film disposed on the outer surface of the laminated assembly.

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