Electrode roll package and manufacturing method thereof

Abstract

The technical idea of the present invention provides an electrode roll package comprising: a bobbin; an electrode roll comprising an electrode sheet wound on the bobbin; a protective cover for surrounding the electrode roll; and a sealing cover for covering the electrode roll and the protective cover such that the electrode roll and the protective cover are sealed.

Description

Electrode roll package and manufacturing method thereof

[0001] The present invention relates to an electrode roll package and a method for manufacturing the same.

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0126172, filed September 21, 2023, and all contents of the document in that Republic of Korea Patent Application are incorporated herein by reference.

[0003] With technological advancements and growing demand for mobile devices, the demand for secondary batteries is also rapidly increasing. Among these, lithium secondary batteries are widely used as a power source for various mobile devices and electronic products due to their high energy density, high operating voltage, and excellent storage and lifespan characteristics. Recently, as the application areas for secondary batteries have expanded, the demand for higher-capacity secondary batteries has skyrocketed.

[0004] Typically, when manufacturing secondary batteries, electrode sheets are manufactured by coating a current collector with an electrode active material, and subsequent processes (e.g., assembly processes) are performed on the electrode sheets. Typically, after the electrode sheets are wound into a roll shape and formed into an electrode roll, the electrode roll is transported to equipment for performing subsequent processes.

[0005] The technical problem to be solved by the present invention is to provide an electrode roll package.

[0006] Another technical task to be achieved by the present invention is to provide a method for manufacturing an electrode roll package.

[0007] In order to solve the above-described problem, the technical idea of ​​the present invention provides an electrode roll package including: a bobbin; an electrode roll including an electrode sheet wound on the bobbin; a protective cover surrounding the electrode roll; and a sealing cover covering the electrode roll and the protective cover so that the electrode roll and the protective cover are sealed.

[0008] In exemplary embodiments, the width of the protective cover is characterized by being greater than the width of the electrode roll.

[0009] In exemplary embodiments, the electrode sheet includes a holding portion on which an electrode slurry layer is applied and a non-holding portion on which the electrode slurry layer is not applied, and the protective cover is characterized in that it covers the holding portion and the non-holding portion of the electrode sheet.

[0010] In exemplary embodiments, the holding portion and the non-holding portion of the electrode sheet are characterized in that they are spaced apart from the sealing cover with the protective cover interposed therebetween.

[0011] In exemplary embodiments, the protective cover is characterized by comprising polycarbonate.

[0012] In exemplary embodiments, the sealing cover is characterized by comprising vinyl.

[0013] In exemplary embodiments, the hardness of the protective cover is characterized by being greater than the hardness of the sealing cover.

[0014] In exemplary embodiments, the coefficient of friction of the protective cover is characterized by being less than the coefficient of friction of the sealing cover.

[0015] In exemplary embodiments, the sealing cover is characterized in that it is secured to both sides of the bobbin protruding laterally from the electrode roll by adhesive tape.

[0016] In exemplary embodiments, the protective cover is characterized in that it provides a hollow portion in which the electrode roll is accommodated, and the size of the hollow portion of the protective cover is configured to be variable.

[0017] In order to solve the above-described problem, the technical idea of ​​the present invention provides a method for manufacturing an electrode roll package, including the steps of: winding an electrode sheet on a bobbin to form an electrode roll; covering the electrode sheet with a protective cover so that the electrode roll is accommodated within a hollow portion of the protective cover; and sealing the electrode roll and the protective cover with a sealing cover.

[0018] In exemplary embodiments, the width of the protective cover is larger than the width of the electrode roll, the electrode sheet includes a holding portion on which an electrode slurry layer is applied and a non-conductive portion on which the electrode slurry layer is not applied, and the protective cover is characterized in that it covers the non-conductive portion of the electrode sheet.

[0019] In exemplary embodiments, the protective cover is characterized in that it surrounds the electrode roll such that the non-conductive portion of the electrode sheet does not contact the sealing cover.

[0020] In exemplary embodiments, the hardness of the protective cover is characterized by being greater than the hardness of the sealing cover.

[0021] In exemplary embodiments, the protective cover comprises polycarbonate and the sealing cover comprises vinyl.

[0022] According to exemplary embodiments of the present invention, by covering the electrode roll with a protective cover having excellent hardness, the electrode roll can be prevented from being damaged during the transport process of the electrode roll package.

[0023] In addition, according to exemplary embodiments of the present invention, damage to the electrode roll due to friction can be prevented by configuring the protective cover in contact with the electrode roll with a material having a low coefficient of friction.

[0024] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0025] FIG. 1 is a perspective view showing an electrode roll package according to exemplary embodiments of the present invention.

[0026] Fig. 2 is a plan view schematically showing the electrode roll package of Fig. 1.

[0027] FIG. 3 is a flowchart illustrating a method for manufacturing an electrode roll package according to exemplary embodiments of the present invention.

[0028] FIGS. 4A and 4B are drawings showing a method for manufacturing an electrode roll package according to exemplary embodiments of the present invention.

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0030] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0031] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0032] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0033]

[0034] (Example 1)

[0035] Fig. 1 is a perspective view illustrating an electrode roll package (100) according to exemplary embodiments of the present invention. Fig. 2 is a plan view schematically illustrating the electrode roll package (100) of Fig. 1.

[0036] Referring to FIGS. 1 and 2, the electrode roll package (100) may include a bobbin (110), an electrode roll (120R) including an electrode sheet (120) wound on the bobbin (110), a protective cover (130), and a sealing cover (140).

[0037] The electrode sheet (120) may be wound on a cylindrical bobbin (110) and provided. The electrode sheet (120) may be wound on the bobbin (110) to form an electrode roll (120R).

[0038] The electrode sheet (120) may include a substrate and an electrode slurry layer applied to at least one of both surfaces of the substrate. The substrate may serve as a current collector and may include, for example, copper or aluminum. The electrode slurry layer may include a positive electrode active material slurry or a negative electrode active material slurry.

[0039] The electrode sheet (120) may include a holding portion (121), which is a region where an electrode slurry layer is applied, and a non-coated portion (123) where the electrode slurry layer is not applied. In the holding portion (121) of the electrode sheet (120), the surface of the substrate may be covered by the electrode slurry layer and not exposed to the outside. In the non-coated portion (123) of the electrode sheet (120), the surface of the substrate may be exposed. The non-coated portion (123) of the electrode sheet (120) may be located at both edges along the width direction of the electrode sheet (120).

[0040] A protective cover (130) can surround the electrode roll (120R). The protective cover (130) can provide a hollow portion (131) for accommodating the electrode roll (120R). When the electrode roll (120R) is inserted into the hollow portion (131) of the protective cover (130), the outer surface of the electrode roll (120R) can be surrounded and covered by the protective cover (130).

[0041] The protective cover (130) can completely surround the outer surface of the electrode roll (120R). The width of the protective cover (130) can be greater than the width of the electrode roll (120R). The width of the protective cover (130) and the width of the electrode roll (120R) can refer to the length in the direction parallel to the extension direction of the bobbin (110). When the electrode roll (120R) is inserted into the hollow portion (131) of the protective cover (130), the holding portion (121) and the uncoated portion (123) of the electrode sheet (120) can be surrounded and covered by the protective cover (130). The protective cover (130) can be formed of a material having excellent hardness, strength, elasticity, heat resistance, and / or transmittance.

[0042] The protective cover (130) can protect the electrode roll (120R) from external impact. To protect the electrode roll (120R) from external impact, the protective cover (130) can be made of a material with excellent hardness.

[0043] The protective cover (130) can directly face and contact the electrode roll (120R). To prevent the electrode sheet (120) from being damaged by friction between the protective cover (130) and the electrode sheet (120), the protective cover (130) can be made of a material having a low coefficient of friction.

[0044] In exemplary embodiments, the protective cover (130) may comprise a plastic material having excellent hardness. In exemplary embodiments, the protective cover (130) may comprise polycarbonate.

[0045] In exemplary embodiments, the protective cover (130) may be a single piece. In exemplary embodiments, the protective cover (130) may be composed of a plurality of detachably joined bodies. In exemplary embodiments, the protective cover (130) may be composed of a plurality of radially overlapping bodies.

[0046] The size (e.g., diameter) of the hollow portion (131) of the protective cover (130) in which the electrode roll (120R) is accommodated may be configured to be variable. In exemplary embodiments, the size (e.g., diameter) of the hollow portion (131) provided by the protective cover (130) may be adjusted according to the size (e.g., outer diameter) of the electrode roll (120R). For example, the size of the hollow portion (131) of the protective cover (130) may be adjusted using a bolt or hinge provided on the protective cover (130). For example, when the protective cover (130) includes a first part and a second part that overlap in the radial direction of the electrode roll (120R), the size of the hollow part (131) of the protective cover (130) can be adjusted by adjusting the position at which the engaging protrusion provided on the first part of the protective cover (130) is fastened to the second part of the protective cover (130) in the circumferential direction of the protective cover (130). For example, when the protective cover (130) includes a first part and a second part that overlap in the radial direction of the electrode roll (120R), a bolt can be screwed through the first part of the protective cover (130) and fastened to the second part of the protective cover (130). At this time, the gap between the first part and the second part of the protective cover (130) can be adjusted in the radial direction of the electrode roll (120R) by rotating the bolt in the fastening direction or the loosening direction opposite to the fastening direction, thereby adjusting the size of the hollow part (131) of the protective cover (130). For example, when the protective cover (130) includes a plurality of segments arranged along its circumferential direction and fastened by bolts, the gap between the plurality of segments of the protective cover (130) can be adjusted in the circumferential direction of the protective cover (130) by rotating the bolts, thereby adjusting the size of the hollow portion (131) of the protective cover (130).

[0047] The sealing cover (140) can seal the electrode roll (120R) and the protective cover (130). The sealing cover (140) covers the electrode sheet (120) and the protective cover (130), and can be fixed to both sides of the bobbin (110) that protrudes laterally from the electrode roll (120R). For example, the sealing cover (140) can be bonded and fixed to both sides of the bobbin (110) that protrudes laterally from the electrode roll (120R) by an adhesive tape (150). The adhesive tape (150) can fix the sealing cover (140) to one side of the bobbin (110) so that no gap is formed between one side of the bobbin (110) that protrudes laterally from the electrode roll (120R) and the sealing cover (140). In addition, the adhesive tape (150) can secure the sealing cover (140) to the other side of the bobbin (110) so that no gap is formed between the other side of the bobbin (110) protruding laterally from the electrode roll (120R) and the sealing cover (140). As the sealing cover (140) is secured to both sides of the bobbin (110) by the adhesive tape (150), a sealing space can be formed that seals the electrode roll (120R) and the protective cover (130).

[0048] The sealing cover (140) may be formed of a flexible material as a packaging material. In exemplary embodiments, the sealing cover (140) may include vinyl.

[0049] The material of the protective cover (130) may be different from the material of the sealing cover (140).

[0050] In exemplary embodiments, the hardness of the material of the protective cover (130) may be greater than the hardness of the material of the sealing cover (140).

[0051] In exemplary embodiments, the coefficient of friction of the material of the protective cover (130) may be less than the coefficient of friction of the material of the sealing cover (140).

[0052] The sealing cover (140) covers and seals the electrode roll (120R) and the protective cover (130), but the holding portion (121) and the uncoated portion (123) of the electrode sheet (120) can be spaced apart from the sealing cover (140) with the protective cover (130) therebetween. The protective cover (130) can prevent the sealing cover (140) from contacting the holding portion (121) and the uncoated portion (123) of the electrode sheet (120), thereby preventing damage to the electrode sheet (120) due to friction between the sealing cover (140) and the electrode sheet (120).

[0053]

[0054] (Example 2)

[0055] Fig. 3 is a flowchart illustrating a method for manufacturing an electrode roll package (100) according to exemplary embodiments of the present invention. Figs. 4a and 4b are drawings illustrating a method for manufacturing an electrode roll package (100) according to exemplary embodiments of the present invention.

[0056] Hereinafter, a method for manufacturing the electrode roll package (100) illustrated in FIGS. 1 and 2 will be described with reference to FIGS. 3, 4a and 4b.

[0057] Referring to FIG. 4a, an electrode sheet (120) is wound around a bobbin (110) to form an electrode roll (120R) (S110). In step S110, the electrode sheet (120) can be manufactured through a coating process of applying an electrode slurry layer on a substrate. The electrode sheet (120) that has undergone the coating process can be wound around a bobbin (110) to form an electrode roll (120R).

[0058] Referring to FIG. 4B, the electrode roll (120R) is covered with a protective cover (130) so that the electrode roll (120R) is inserted into the hollow portion (131) of the bobbin (110) (S120). In step S120, the protective cover (130) may cover the entire outer surface of the electrode roll (120R). In some exemplary embodiments, before performing step S120, a step of adjusting the size of the hollow portion (131) of the protective cover (130) may be further performed based on the outer diameter of the electrode roll (120R).

[0059] Referring to Fig. 1, the electrode roll (120R) and the protective cover (130) are covered with a sealing cover (140) (S130). After covering the electrode roll (120R) and the protective cover (130) with the sealing cover (140), one side of the sealing cover (140) can be fixed to one side of the bobbin (110) protruding laterally from the electrode roll (120R) using an adhesive tape (150), and the T-side of the sealing cover (140) can be fixed to the other side of the bobbin (110) protruding laterally from the electrode roll (120R) using an adhesive tape (150). As the sealing cover (140) is fixed to both sides of the bobbin (110) by the adhesive tape (150), the electrode roll (120R) and the protective cover (130) can be sealed to the sealing cover (140).

[0060] As a comparative example, when the electrode roll is packaged only with a vinyl material packaging material, there is a problem in that the electrode roll is damaged by external impact during the transport of the electrode roll, or the uncoated portion of the electrode sheet is damaged by friction between the packaging material and the uncoated portion of the electrode sheet.

[0061] According to exemplary embodiments of the present invention, by covering the electrode roll (120R) with a protective cover (130) having excellent hardness, it is possible to prevent the electrode roll (120R) from being damaged during the transport process of the electrode roll package (100).

[0062] In addition, according to exemplary embodiments of the present invention, by configuring the protective cover (130) in contact with the electrode roll (120R) with a material having a low coefficient of friction, damage to the electrode roll (120R) due to friction can be prevented.

[0063] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. Bobbin; An electrode roll comprising an electrode sheet wound on the bobbin; a protective cover surrounding the electrode roll; and A sealing cover covering the electrode roll and the protective cover so that the electrode roll and the protective cover are sealed; Electrode roll package including.

2. In paragraph 1, An electrode roll package, characterized in that the width of the protective cover is greater than the width of the electrode roll.

3. In paragraph 1, The electrode sheet includes a holding portion on which an electrode slurry layer is applied and a non-conductive portion on which the electrode slurry layer is not applied. An electrode roll package characterized in that the above protective cover covers the holding portion and the non-holding portion of the electrode sheet.

4. In paragraph 3, An electrode roll package characterized in that the holding portion and the non-holding portion of the electrode sheet are spaced apart from the sealing cover with the protective cover interposed therebetween.

5. In paragraph 1, An electrode roll package characterized in that the above protective cover comprises polycarbonate.

6. In paragraph 1, An electrode roll package characterized in that the above sealing cover comprises vinyl.

7. In paragraph 1, An electrode roll package, characterized in that the hardness of the protective cover is greater than the hardness of the sealing cover.

8. In paragraph 1, An electrode roll package, characterized in that the coefficient of friction of the protective cover is smaller than the coefficient of friction of the sealing cover.

9. In paragraph 1, An electrode roll package characterized in that the sealing cover is fixed to both sides of the bobbin protruding laterally from the electrode roll by adhesive tape.

10. In paragraph 1, The above protective cover provides a hollow portion in which the electrode roll is accommodated, An electrode roll package characterized in that the size of the hollow portion of the protective cover is configured to be variable.

11. A step of winding an electrode sheet onto a bobbin to form an electrode roll; A step of covering the electrode sheet with the protective cover so that the electrode roll is accommodated within the hollow portion of the protective cover; and A step of sealing the electrode roll and the protective cover with a sealing cover; A method for manufacturing an electrode roll package including:

12. In paragraph 11, The width of the above protective cover is larger than the width of the above electrode roll, The electrode sheet includes a holding portion on which an electrode slurry layer is applied and a non-conductive portion on which the electrode slurry layer is not applied. A method for manufacturing an electrode roll package, characterized in that the protective cover covers the non-conductive portion of the electrode sheet.

13. In paragraph 12, A method for manufacturing an electrode roll package, characterized in that the protective cover surrounds the electrode roll so that the non-conductive portion of the electrode sheet does not come into contact with the sealing cover.

14. In paragraph 11, A method for manufacturing an electrode roll package, characterized in that the hardness of the protective cover is greater than the hardness of the sealing cover.

15. In paragraph 11, The above protective cover comprises polycarbonate, A method for manufacturing an electrode roll package, characterized in that the above sealing cover comprises vinyl.

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