Battery unit and battery pack and electric two-wheel vehicle

Abstract

The present invention relates to a battery cell comprising: an electrode assembly; a battery case having an opening provided at one side and accommodating the electrode assembly through the opening; a gasket disposed on an opening side of the battery case; an outer member for covering the battery case and at least a portion of the gasket; and an adhesive member disposed on at least one side portion of the outer member to enhance adhesiveness of the outer member.

Description

Technical Field

[0001] The present disclosure relates to a battery cell, a battery pack including the battery cell, and an electric two-wheeled vehicle.

[0002] This application is based on and claims the benefit of priority from Korean Patent Application No. 10-2023-0131972 filed on October 4, 2023, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. Background Art

[0003] Secondary batteries—which are easily applicable depending on the product group and have electrical characteristics such as high energy density—are commonly used in electric vehicles (EVs) or hybrid electric vehicles (HEVs) driven by electric drive sources, as well as portable devices. These secondary batteries have attracted attention as a new energy source for improving eco-friendliness and energy efficiency, due to their primary advantage of significantly reducing the use of fossil fuels and their additional advantage of not producing byproducts resulting from energy use.

[0004] A battery pack can be constructed by connecting a plurality of battery cells in series or in parallel, depending on the charge / discharge capacity of the battery pack required for an electric vehicle (EV) or a hybrid electric vehicle (HEV). In this case, it is generally preferred to form a battery module including at least one battery cell, and then other components are added using the at least one battery module to thereby construct a battery pack or battery rack. Alternatively, battery packs have recently been manufactured in a cell-to-pack type, in which a plurality of battery cells are directly stored in a pack housing, rather than being modularized.

[0005] Meanwhile, existing battery cells may include external components located on the exterior of the battery case. If a battery cell is repeatedly exposed to high and low temperature conditions during temperature cycling testing, the external component, which is constructed as a film or the like, may shrink due to the characteristics of the external component, potentially exposing the top of the battery cell. In this case, the likelihood of a short circuit occurring in a battery pack containing a large number of battery cells is increased.

[0006] In particular, when a gasket is provided on top of the battery case to supplement electrical insulation, when the external member shrinks, the area of the gasket covered by the external member gradually decreases, so that the gasket may move, thereby increasing the risk of short circuit in the battery pack.

[0007] Therefore, there is a need to develop a battery cell that can prevent external members from shrinking so that the top of the battery cell is exposed even when the battery cell is repeatedly exposed to high temperature conditions / low temperature conditions.

[0008] In particular, there is a demand for developing a battery cell capable of increasing adhesive force or frictional force between a gasket and an external member to prevent the gasket from moving, thereby suppressing a short circuit in a battery pack. Summary of the Invention

[0009] Technical issues

[0010] The present disclosure is intended to solve the problems of the related art, and therefore, the present disclosure is intended to provide a battery cell that can ensure safety and reliability by preventing the upper portion of the battery cell from being exposed even when the battery cell is repeatedly exposed to high temperature conditions / low temperature conditions.

[0011] In addition, the present disclosure also provides a battery pack including such a battery cell.

[0012] However, the technical problems that the present disclosure seeks to solve are not limited to the above-mentioned problems, and other problems not mentioned above will be clearly understood by those skilled in the art from the description of the present invention described below.

[0013] Technical Solution

[0014] According to one aspect of the present disclosure, a battery cell is provided, comprising: an electrode assembly; a battery case having an opening at one side and configured to accommodate the electrode assembly through the opening; a gasket disposed on the open side of the battery case; an external member configured to cover at least a portion of the gasket and the battery case; and an adhesive member disposed on at least one side surface of the external member and configured to enhance the adhesive strength of the external member.

[0015] An adhesive member may be provided between the gasket and the outer member.

[0016] The gasket may include a first portion to which the external member is adhered, and a second portion which is a remaining region except for the first portion, and the adhesive member may be provided only on the first portion.

[0017] The adhesive member may be provided on the outer surface of the exterior member.

[0018] The adhesive member may be configured as a tape having an adhesive surface formed on one surface thereof.

[0019] The adhesive member may be configured in the shape of a ring having a hole formed in the center thereof.

[0020] The battery case may include a press-fitting portion configured to be bent inward from an upper periphery of the battery case in a radial direction of the electrode assembly.

[0021] A washer may be provided on an upper surface of the crimping portion.

[0022] According to another aspect of the present disclosure, a battery pack is provided, including a plurality of the above-mentioned battery cells according to the embodiments of the present disclosure.

[0023] According to another aspect of the present disclosure, there is provided an electric two-wheeled vehicle including the above-described battery pack according to the embodiment of the present disclosure.

[0024] According to another aspect of the present disclosure, a method for manufacturing such a battery is provided.

[0025] According to the present disclosure, a method for manufacturing a battery cell may include: mounting a gasket onto the upper surface of a battery case; positioning an adhesive member on at least a portion of an outer surface of the gasket; and wrapping the battery case with an external member so as to cover at least a portion of the gasket and the battery case, the battery cell including: an electrode assembly; a battery case having an opening on one side and configured to accommodate the electrode assembly; and a gasket disposed on the open side of the battery case.

[0026] The adhesive member may be configured as a liquid and applied to the outer surface of the gasket.

[0027] The method may further include covering a portion of the gasket before applying the bonding member.

[0028] In another embodiment, the adhesive member may be configured as an adhesive surface provided on one surface of the gasket.

[0029] In another embodiment, the adhesive member may be configured as an adhesive surface provided on one surface of the exterior member.

[0030] According to the present disclosure, another method for manufacturing a battery cell includes: mounting a gasket onto an upper surface of a battery case; wrapping the battery case with an external member so as to cover at least a portion of the gasket and the battery case; and positioning an adhesive member on an outer edge of the external member, the battery cell including: an electrode assembly; a battery case having an opening on one side and configured to accommodate the electrode assembly; and a gasket disposed on the open side of the battery case.

[0031] Here, the adhesive member may be configured as a tape having an adhesive surface formed on one surface thereof.

[0032] The adhesive member may be configured in the shape of a ring having a hole formed in the center thereof.

[0033] Beneficial effects

[0034] According to one aspect of the present disclosure, even when a battery cell is repeatedly exposed to high / low temperature conditions, an adhesive member can be used to prevent the external member from shrinking, exposing the upper portion of the battery cell. According to this aspect of the present disclosure, the safety and reliability of the battery cell can be ensured.

[0035] According to another aspect of the present disclosure, a plurality of components may be coupled to each other only through a simple process of applying a predetermined pressure in manufacturing a battery cell, thereby improving productivity.

[0036] Specifically, according to another aspect of the present disclosure, occurrence of a short circuit can be suppressed in a battery pack including a plurality of battery cells.

[0037] In addition, the present disclosure may have various other effects, and these effects will be described in the corresponding embodiments, or descriptions of effects that can be easily inferred by those skilled in the art will be omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the detailed description of the present invention, serve to provide further understanding of the technical concept of the present disclosure, and therefore, the present disclosure should not be construed as being limited to the accompanying drawings.

[0039] Figure 1 is a perspective view of a battery cell according to an embodiment of the present disclosure.

[0040] Figure 2 is a cross-sectional view of a battery cell according to an embodiment of the present disclosure.

[0041] Figure 3 is a plan view of a battery cell according to an embodiment of the present disclosure.

[0042] Figure 4 is a plan view of a battery cell of a comparative example in which no adhesive member is provided, unlike the battery cell according to the embodiment of the present disclosure.

[0043] Figure 5 is a cross-sectional view of a portion of a battery cell according to an embodiment of the present disclosure.

[0044] Figure 6 is a diagram illustrating a manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0045] Figure 7 is a diagram illustrating another manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0046] Figure 8 is a diagram illustrating another manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0047] Figure 9 is a diagram illustrating another manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0048] Figure 10 is a cross-sectional view of a portion of a battery cell according to another embodiment of the present disclosure.

[0049] Figure 11 is a diagram illustrating a manufacturing process of a battery cell according to another embodiment of the present disclosure.

[0050] Figure 12 is a schematic perspective view of a battery pack including a battery cell according to an embodiment of the present disclosure.

[0051] Figure 13 is a schematic perspective view of an electric two-wheeled vehicle including a battery pack according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general meaning and dictionary meaning, but should be interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to appropriately define the terms for the best description.

[0053] Therefore, the embodiments of this specification and the configurations proposed in the drawings only indicate the most preferred embodiments of the present disclosure and do not represent the entire technical concept of the present disclosure. Therefore, it should be understood that various equivalent replacements and modifications can be made to the present application when the present application is submitted.

[0054] In addition, the present disclosure may include various embodiments. Redundant descriptions of substantially the same configuration or similar configurations will be omitted from the corresponding embodiments, and will be described based on the differences therebetween.

[0055] At the same time, although terms indicating directions such as upward direction, downward direction, left direction, right direction, forward direction and backward direction are used in this specification, it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the position of the target object or the position of the observer.

[0056] For ease of explanation, in this specification, the longitudinal direction of the winding axis of an electrode assembly wound into a wound type will be referred to as the axial direction. Additionally, the direction around the winding axis will be referred to as the circumferential direction. Additionally, the direction approaching or moving away from the winding axis will be referred to as the radial direction.

[0057] Figure 1is a perspective view of a battery cell according to an embodiment of the present disclosure, Figure 2 is a cross-sectional view of a battery cell according to an embodiment of the present disclosure, and Figure 3 is a plan view of a battery cell according to an embodiment of the present disclosure. Figure 4 is a plan view of a battery cell of a comparative example in which no adhesive member is provided, unlike the battery cell according to the embodiment of the present disclosure.

[0058] Reference Figures 1 to 3 , a battery cell 1 according to an embodiment of the present disclosure includes an electrode assembly 10, a battery case 20, a gasket 30, an exterior member 40, and an adhesive member 50. The battery cell 1 may be a cylindrical battery cell as shown.

[0059] Reference Figure 2 , the electrode assembly 10 can be housed in the battery case 20. The electrode assembly 10 may include a first electrode having a first polarity, a second electrode having a second polarity, and a separator interposed between the first electrode and the second electrode. The electrode assembly 10 may have a wound structure. That is, the electrode assembly 10 can be manufactured by winding a laminate in one direction relative to the axial direction passing through the winding hole H1, the laminate being formed by stacking a first electrode and a second electrode having a sheet shape at least once with a separator interposed therebetween. In this case, an additional separator may be provided on the outer surface of the electrode assembly 10 to insulate from the battery case 20. Any wound structure known in the art may be applied to the present disclosure without limitation. The first electrode is a positive electrode or a negative electrode, and the second electrode is an electrode having a polarity opposite to that of the first electrode.

[0060] The first electrode may include a first electrode current collector and a first electrode active material, the first electrode active material being coated on one side surface or both side surfaces of the first electrode current collector. The first electrode may have an uncoated portion (first uncoated portion) at its upper end, on which the electrode active material is not coated. That is, the uncoated portion (first uncoated portion) not coated with the first electrode active material may be provided at one end of the first electrode current collector in the width direction (direction parallel to the Z axis). The uncoated portion itself may serve as the first electrode tab 11. The first electrode tab 11 may be provided at the top of the electrode assembly 10 housed in the battery case 20 in the height direction (direction parallel to the Z axis). That is, the first electrode current collector may include a first uncoated portion at the end of the long side, on which no active material layer is formed so that the separator is exposed to the outside, and at least a portion of the first uncoated portion itself may serve as an electrode tab. The first electrode tab 11 may be, for example, a positive electrode tab.

[0061] The second electrode may include a second electrode current collector and a second electrode active material, the second electrode active material being coated on one side or both sides of the second electrode current collector. The second electrode may have an uncoated portion (second uncoated portion) at its lower end portion, the uncoated portion being formed by not coating the electrode active material thereon. That is, the uncoated portion not coated with the second electrode active material may be provided at the other end portion in the width direction (direction parallel to the Z axis) of the second electrode current collector. The uncoated portion itself may be used as the second electrode tab 12. The second electrode tab 12 may be provided at the bottom of the electrode assembly 10 housed in the battery case 20 in the height direction (direction parallel to the Z axis). That is, the second electrode current collector may include a second uncoated portion at the end portion of the long side, on which no active material layer is formed so that the separator is exposed to the outside, and at least a portion of the second uncoated portion itself may be used as an electrode tab. The second electrode tab 12 may be, for example, a negative electrode tab.

[0062] The first electrode tab 11 and the second electrode tab 12 may extend in opposite directions along the height direction of the battery cell 1 (a direction parallel to the Z axis). Figure 2 In the illustrated embodiment, the first electrode tab 11 may extend toward an opening formed at the top of the battery case 20 , and the second electrode tab 12 may extend toward a closed portion formed at the bottom of the battery case 20 .

[0063] Reference Figures 1 to 3 The battery case 20 may be configured as a substantially cylindrical container. The battery case 20 may have an opening at one side. The battery case 20 may receive the electrode assembly 10 and the electrolyte through the opening formed at one side. The sidewall of the battery case 20 and the closed portion formed on the opposite side of the opening may be integrally formed, or may be formed separately and then joined to each other by welding or the like.

[0064] The battery case 20 may be made of a conductive metal material. The battery case 20 may be electrically connected to the second electrode tab 12 of the electrode assembly 10. Therefore, the battery case 20 may have the same second polarity as the second electrode tab 12. The electrode assembly 10 and the battery case 20 may be electrically connected, for example, by a second current collector 90.

[0065] At the same time, refer to Figures 1 to 3, the battery cell 1 according to an embodiment of the present disclosure may further include a top cover 60. The top cover 60 may cover the upper opening of the battery case 20. The top cover 60 may be made of a conductive metal material. The top cover 60 may be electrically connected to the first electrode tab 11 of the electrode assembly 10 and configured to be electrically insulated from the battery case 20. Therefore, the top cover 60 may have the same first polarity as the first electrode tab 11 of the electrode assembly 10 and may serve as the first electrode terminal of the battery cell 1 of the present disclosure. The first electrode tab 11 and the top cover 60 may be electrically connected by, for example, a first current collector 80.

[0066] The top cover 60 may have a protrusion 61 formed to protrude upward from the approximate center of the top cover 60. The protrusion 61 may protrude through the gasket hole H2 of the gasket 30 to extend further upward than the upper surface of the gasket 30, thereby facilitating contact with electrical connection components such as busbars. However, the present disclosure is not limited thereto, and the top cover 60 may be formed as a whole to be flat. In addition, even if the top cover 60 has the protrusion 61, the upper surface of the protrusion 61 may be positioned at approximately the same height as the upper surface of the gasket 30 or positioned lower than the upper surface of the gasket 30.

[0067] The battery case 20 may include a beaded portion 21. The beaded portion 21 may be formed adjacent to the opening side of the battery case 20. The beaded portion 21 may be formed by pressing the outer periphery of the battery case 20. Therefore, the beaded portion 21 may be configured to be recessed to a predetermined depth in the radial direction from the outer surface of the battery case 20 and may extend along the circumferential direction of the battery case 20. The beaded portion 21 is intended to prevent the electrode assembly 10, whose size corresponds to the width of the battery case 20, from popping out through the upper opening of the battery case 20 and may serve as a support on which the top cover 60 is seated.

[0068] The battery case 20 may include a crimping portion 22. The crimping portion 22 may be formed on the open side of the battery case 20. The crimping portion 22 may be configured to bend inward from the upper periphery of the battery case 20 along the radial direction of the electrode assembly 10. In the case where the battery case 20 is provided with a curling portion 21, the crimping portion 22 may be formed above the curling portion 21. The crimping portion 22 may extend from the curling portion 21 and may be configured to extend and bend to surround a portion of the upper surface and outer periphery of the top cover 60 provided on the curling portion 21. The upper end portion of the crimping portion 22 may extend inward a predetermined distance along the radial direction of the battery cell 1 so as to surround a portion of the upper surface of the top cover 60. Therefore, the crimping portion 22 may fix the edge of the upper surface of the top cover 60. According to the configuration of the above-mentioned implementation of the present disclosure, the crimping portion 22 may fix the top cover 60 to prevent the top cover 60 from separating upward.

[0069] At the same time, a gasket G may be interposed between the top cover 60 and the crimping portion 22 of the battery case 20 to seal the upper opening of the battery case 20 and electrically insulate the battery case 20 from the top cover 60. The gasket G may include a material having insulating properties and elasticity. The gasket G may include, for example, a polymer resin. The gasket G may be bent to correspond to the bent shape of the crimping portion 22 of the battery case 20. In the case where the battery case 20 has a crimping portion 21, the gasket G may be interposed between the upper surface of the crimping portion 21 and the upper end of the crimping portion 22.

[0070] In addition, the battery cell 1 according to an embodiment of the present disclosure may include a vent 70 for reducing internal pressure. The vent 70 may be configured as a thin plate of conductive material. The vent 70 may have a downwardly directed recess formed in its center portion, and a plurality of notches having different depths may be formed in the upper and lower bent portions of the center portion.

[0071] Although the structure of the battery cell 1 has been described in detail as an example, the present disclosure is not limited to the structure of the battery cell 1. The present disclosure provides a battery cell including a bonding member and a method of manufacturing the battery cell.

[0072] Reference Figures 1 to 3 , the gasket 30 can be provided on the opening side of the battery case 20. Specifically, the gasket 30 can be seated on the upper end portion of the battery case 20. In the case where the crimping portion 22 is formed at the upper end portion of the battery case 20, the gasket 30 can be seated on the upper surface of the crimping portion 22. The gasket 30 can have, for example, a roughly disc shape with a hole formed at its approximate center. That is, the gasket 30 can have a roughly ring shape with a gasket hole H2 formed at its approximate center. The gasket 30 can protect the battery cell 1 from external impacts and supplement the mechanical strength of the components mounted on the top of the battery cell 1.

[0073] The gasket 30 can be fixed to the top of the battery case 20 in various ways. For example, the outer surface of the gasket 30 can be fixed by a crimping process of the battery case 20, or the outer surface of the gasket 30 can be fixed by using a heat shrink tube and shrinking it when covering the outer surface of the battery case 20 with the external member 40.

[0074] The gasket 30 may be configured to be electrically insulated from the top cover 60 and the battery case 20. The top cover 60 may be exposed through a gasket hole H2 formed in the center of the gasket 30, and the gasket 30 and the top cover 60 may be spaced apart from each other. In the case where the top cover 60 has a protrusion 61, the protrusion 61 may be exposed through the gasket hole H2.

[0075] According to the configuration of the present disclosure, the gasket 30 can play a role of supplementary electrical insulation. Specifically, the gasket 30 can prevent an internal short circuit from occurring when the top cover 60 as the first electrode terminal contacts the battery case 20 as the second electrode terminal.

[0076] The external member 40 can be configured to surround the outer surface of the battery cell 1. The external member 40 can be configured to cover at least a portion of the gasket 30 and the battery housing 20. For example, the external member 40 can be configured to cover the side surface of the battery housing 20 and at least a portion of the upper surface of the gasket 30. The external member 40 can be configured as a substantially square sheet to wrap around the outer surface of the battery housing 20 and seal the upper portion of the gasket 30. The external member 40 can be configured to cover the lower surface of the battery housing 20. The external member 40 can be formed as a generally cylindrical heat shrink tube, and the battery housing 20 can be inserted into the external member 40 so that the external member 40 wraps around the battery housing 20. Thus, the external member 40 can wrap around the outer surface of the battery housing 20 and the upper portion of the gasket 30, and then seal them by applying a predetermined amount of heat. The external member 40 can protect sub-portions of the battery cell 1, such as the battery housing 20.

[0077] Meanwhile, the battery cell 1 according to an embodiment of the present disclosure may include an adhesive member 50. The adhesive member 50 may be provided on at least one side surface of the exterior member 40. The adhesive member 50 may be configured to enhance the adhesive force between the exterior member 40 and the gasket 30. According to the configuration of the above-described implementation of the present disclosure, the adhesive member 50 may be adhered to the exterior member 40, thereby fixing the position of the gasket 30.

[0078] As in Figure 4 In the illustrated comparative example, if no adhesive member is provided on at least one surface of the exterior member 40, the exterior member 40 may shrink due to repeated exposure of the battery cell 1' to high / low temperature conditions, causing the area of the gasket 30 covered by the exterior member 40 to gradually decrease while the exposed area of the gasket 30 to gradually increase (see the arrow direction). In this case, there is a risk that the gasket 30 may move and cause a short circuit.

[0079] On the other hand, as in Figure 3 In the illustrated embodiment, if the adhesive member 50 is provided on at least one surface of the exterior member 40 , the adhesive force or friction force between the gasket 30 and the exterior member 40 may be increased, so that the exterior member 40 can stably cover the gasket 30 , thereby ensuring the safety of the battery cell 1 .

[0080] In addition, according to the above-implemented configuration of the present disclosure, due to the adhesive component of the adhesive member 50 , the gasket 30 and the outer member 40 can be bonded to each other only through a simple process of applying a predetermined pressure, which is advantageous in terms of process efficiency.

[0081] Figure 5 is a cross-sectional view of a portion of a battery cell according to an embodiment of the present disclosure, Figure 6 is a diagram illustrating a manufacturing process of a battery cell according to an embodiment of the present disclosure, and Figure 7 is a diagram illustrating another manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0082] According to an embodiment of the present disclosure, the adhesive member 50 may be provided between the gasket 30 and the external member 40. That is, the adhesive member 50 may be provided on the inner surface of the external member 40. The adhesive member 50 may be provided on at least a portion of the gasket 30. Specifically, the gasket 30 may include: a first portion 31 to which the external member 40 adheres; and a second portion 32, which is the remaining area other than the first portion 31, and the adhesive member 50 may be provided only in the first portion 31. The first portion 31 may be provided along the outer periphery of the gasket 30. In this case, the second portion 32 may include the protrusion 61 of the top cover 60. Therefore, the protrusion 61 serving as the first electrode may not be covered by the external member 40.

[0083] Reference Figure 6 , first, as Figure 6 As shown in (a) of FIG. 1 , the gasket 30 may be mounted to the opening side of the battery housing 20, for example, to the upper surface of the battery housing 20 in the illustrated example. Figure 6 As shown in (b) of FIG. 3 , the adhesive member 50 may be applied to at least a portion of the outer surface of the gasket 30. In this case, the adhesive member 50 may include an adhesive in the form of a gel or liquid. Figure 6 As shown in (c) in FIG. 1 , the exterior member 40 may wrap the battery case 20 so as to cover the outer surface of the battery case 20 and at least a portion of the gasket 30. In this state, a predetermined amount of heat may be applied to the exterior member 40 so that the exterior member 40 may be adhered to the battery case 20 and the gasket 30 by the adhesive member 50.

[0084] According to the configuration of the present disclosure, even if the battery cell 1 is repeatedly exposed to high / low temperatures, causing the external member 40 to shrink, the adhesive member 50 can prevent the external member 40 from peeling off, thereby preventing the gasket 30 from being exposed to the outside. Therefore, the risk of short circuit can be prevented, and the safety of the battery cell 1 can be ensured.

[0085] Meanwhile, according to an embodiment of the present disclosure, the adhesive member 50 may be configured as a liquid and then applied to the outer surface of the gasket 30. Specifically, referring to Figure 7 , first, as Figure 7 As shown in (a) of FIG. 1 , the gasket 30 may be mounted to the opening side of the battery housing 20, for example, to the upper surface of the battery housing 20. Next, as shown in FIG. Figure 7 As shown in (b) of FIG. 5 , a portion of the gasket 30 may be covered before applying the adhesive member 50. The covered portion is shaded in the figure. That is, the second portion 32 of the gasket 30 to which the external member 40 is not adhered may be covered.

[0086] Then, if Figure 7 As shown in (c) in FIG. 3 , the adhesive member 50 may be applied to the gasket 30. In this case, the adhesive member 50 may be applied to the gasket 30 using spraying or the like. Even when the adhesive member 50 is uniformly applied while covering the second portion 32, the adhesive member 50 may be applied only to the first portion 31. Therefore, the coating process is easy and the adhesive member 50 may be prevented from being applied to a portion of the top cover 60 serving as the first electrode terminal.

[0087] Next, if Figure 7 As shown in FIG. 5 ( d ), the exterior member 40 may wrap the battery case 20 so as to cover the outer surface of the battery case 20 and at least a portion of the gasket 30 .

[0088] According to the configuration of the present disclosure, the adhesive member 50 can be completely prevented from being applied to a portion of the top cover 60 serving as the first electrode terminal. In addition, when applying the adhesive member 50 configured as a liquid, the adhesive member 50 can be quickly applied to a large area, thereby reducing the time and cost for the manufacturing process and improving productivity.

[0089] Figure 8 is a diagram illustrating another manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0090] According to an embodiment of the present disclosure, an adhesive surface 51 may be provided on one surface of the gasket 30. The adhesive surface 51 may be provided on the first portion 31. The adhesive surface 51 may be one surface of a double-sided tape. Figure 8 As shown in (a) of FIG. 5 , the gasket 30 having the adhesive surface 51 may be mounted to the open side of the battery housing 20, for example, to the upper surface of the battery housing 20. Then, as shown in FIG. Figure 8As shown in (b) of FIG. 2 , the external member 40 may wrap the battery case 20 so as to cover the outer surface of the battery case 20 and at least a portion of the gasket 30. In this state, a predetermined amount of heat may be applied to the external member 40 so that the adhesive surface 51 and the external member 40 may be bonded, and the external member 40 may be bonded to the battery case 20 and the gasket 30.

[0091] That is, in the present embodiment, the adhesive member 50 may be provided as an adhesive surface 51 on one surface of the gasket 30. In the present embodiment, the battery cell 1 is manufactured in the following order: mounting the gasket 30 on the upper surface of the battery case 20; positioning the adhesive member 50 on at least a portion of the outer surface of the gasket 30; and wrapping the battery case 20 with the external member 40 so as to cover at least a portion of the gasket 30 and the battery case 20. In the present embodiment, the adhesive surface 51 of the gasket 30 serves as the adhesive member 50, and in particular, in this case, reference to Figure 6 and Figure 7 The process of applying the liquid-type adhesive member to the battery case 20 and the gasket 30 is described, thereby reducing time and cost in the manufacturing process and improving productivity.

[0092] Figure 9 is a diagram illustrating another manufacturing process of a battery cell according to an embodiment of the present disclosure.

[0093] According to an embodiment of the present disclosure, an adhesive surface 51 may be provided on one surface of the outer member 40. The adhesive surface 51 may be provided on the inner surface of the outer member 40. The adhesive surface 51 may be provided on a portion of the outer member 40 that covers the upper surface of the gasket 30. The adhesive surface 51 may be one surface of a double-sided tape. Figure 9 After the gasket 30 is mounted on the upper surface of the battery case 20 as shown in (a), the external member 40 provided with the adhesive surface 51 can be adhered to the battery case 20 so as to cover at least a portion of the gasket 30 and the battery case 20, as shown in FIG. Figure 9 As shown in (b) in .

[0094] That is, in the present embodiment, the adhesive member 50 may be provided as an adhesive surface 51 provided on one surface of the external member 40. In the present embodiment, the battery cell 1 is manufactured in the following order: the gasket 30 is mounted on the upper surface of the battery case 20; the adhesive member 50 is positioned on at least a portion of the outer surface of the gasket 30; and the battery case 20 is wrapped with the external member 40 so as to cover at least a portion of the gasket 30 and the battery case 20. In the present embodiment, the adhesive surface 51 of the external member 40 serves as the adhesive member 50, and in particular, in this case, reference to Figure 6 and Figure 7 The process of applying the liquid-type adhesive member to the battery case 20 and the gasket 30 is described, thereby reducing time and cost in the manufacturing process and improving productivity.

[0095] Figure 10 is a cross-sectional view of a portion of a battery cell according to another embodiment of the present disclosure, and Figure 11 is a diagram illustrating a manufacturing process of a battery cell according to another embodiment of the present disclosure.

[0096] According to another embodiment of the present disclosure, an adhesive member 50 may be provided on the outer surface of the exterior member 40. Figure 10 , the adhesive member 50 may be provided on the upper surface of the outer member 40 and the upper surface of the gasket 30. The adhesive member 50 may be provided along the outer circumferential surface of the portion of the outer member 40 covering the gasket 30.

[0097] Specifically, the adhesive member 50 may be configured as a tape having an adhesive surface formed on one surface. Alternatively, the adhesive member 50 may be formed in the shape of a ring with a hole formed in the center. The adhesive member 50 may be configured to cover the remaining portion of the top cover 60 except for the protrusion 61. The inner diameter of the hole of the adhesive member 50 may be configured to correspond to the outer diameter of the protrusion 61.

[0098] A method of manufacturing such a battery cell 1 may be as follows.

[0099] Specifically, first, Figure 11 As shown in (a) of FIG. 1 , the gasket 30 may be mounted on the upper surface of the battery housing 20. Next, as shown in FIG. Figure 11 As shown in (b) of FIG. 2 , the external member 40 may wrap the battery case 20 so as to cover the outer surface of the battery case 20 and at least a portion of the gasket 30. Then, as shown in FIG. Figure 11 As shown in (c) in FIG. 3 , the adhesive member 50 may be positioned on the outer edge of the outer member 40. In this case, as described in the above embodiment, the adhesive member 50 may be configured as a tape having an adhesive surface formed on the surface thereof, and the adhesive member 50 may be adhered to the outer edge of the outer member 40 and a portion of the gasket 30.

[0100] According to the above-described configuration of the present disclosure, the force of the adhesive member 50 pulling the outer member 40 acts in the opposite direction to the force causing the outer member 40 to contract, thereby retaining the outer member 40. Therefore, the outer member 40 can be prevented from contracting due to its physical properties. In addition, since the adhesive member 50 can fix the gasket 30, it can be prevented from moving and causing a short circuit.

[0101] Figure 12 is a schematic perspective view of a battery pack including a battery cell according to an embodiment of the present disclosure.

[0102] Reference Figure 12 A battery pack 3 according to an embodiment of the present disclosure may include: a battery cell assembly in which a plurality of battery cells 1 according to an embodiment of the present disclosure described above are electrically connected; and a pack case 2 that accommodates the battery cell assembly. The plurality of battery cells 1 may be accommodated within the pack case 2 such that the opening of the battery case 20 faces upward.

[0103] Meanwhile, although the battery pack 3 according to the embodiment of the present disclosure may further include components such as bus bars for electrical connection, a cooling unit, and power terminals, these components have been omitted from the drawings for ease of explanation.

[0104] Figure 13 is a schematic perspective view of an electric two-wheeled vehicle including a battery pack according to an embodiment of the present disclosure.

[0105] Reference Figure 13 The electric two-wheeled vehicle 5 according to an embodiment of the present disclosure includes the battery pack 3 of the present disclosure described above. The electric two-wheeled vehicle 5 is operated by receiving power from the battery pack 3 of the present disclosure. The electric two-wheeled vehicle 5 may be a two-wheeled vehicle operated solely by the power supply from the battery pack 3, or may be a hybrid two-wheeled vehicle operated by other energy sources such as fuel as well as power supply. The electric two-wheeled vehicle 5 includes, for example, an electric scooter, an electric bicycle, and the like.

[0106] As described above, although the present disclosure has been described with reference to limited embodiments and drawings, the present disclosure is not limited thereto, and those skilled in the art to which the present disclosure pertains may make various modifications and variations within the scope of the technical concept of the present disclosure and equivalents of the claims described below.

Claims

1. A battery cell comprising: electrode assembly; a battery case having an opening at one side and configured to accommodate the electrode assembly through the opening; a gasket disposed on an opening side of the battery housing; an exterior member configured to cover at least a portion of the gasket and the battery housing; as well as An adhesive member is provided on at least one side surface of the exterior member and is configured to enhance adhesive strength of the exterior member.

2. The battery cell according to claim 1, in, The adhesive member is provided between the gasket and the external member.

3. The battery cell according to claim 2, in, The gasket comprises: a first portion to which the exterior member is adhered, and a second portion, the second portion being a remaining area except the first portion, and Wherein, the bonding member is only provided on the first portion.

4. The battery cell according to claim 1, in, The adhesive member is provided on the outer side surface of the exterior member.

5. The battery cell according to claim 4, in, The adhesive member is configured as a tape having an adhesive surface formed on one surface of the tape.

6. The battery cell according to claim 4, in, The adhesive member is configured in the shape of a ring having a hole formed in the center of the ring.

7. The battery cell according to claim 1, in, The battery case includes a press-fitting portion configured to be bent inward from an upper periphery of the battery case in a radial direction of the electrode assembly.

8. The battery cell according to claim 7, in, The gasket is provided on an upper surface of the crimping portion. 9 . A battery pack comprising a plurality of battery cells according to claim 1 . 10 . An electric two-wheeled vehicle comprising the battery pack according to claim 9 .

11. A method for manufacturing a battery cell, the battery cell comprising: electrode assembly; a battery case having an opening at one side and configured to accommodate the electrode assembly; and a gasket disposed on an open side of the battery housing, the method comprising: installing the gasket onto the upper surface of the battery housing; positioning an adhesive member on at least a portion of an outer surface of the gasket; and The battery case is wrapped with an exterior member so as to cover the at least a portion of the gasket and the battery case.

12. The method for manufacturing a battery cell according to claim 11, in, The adhesive member is configured as a liquid and is applied to the outer surface of the gasket.

13. The method for manufacturing a battery cell according to claim 12, Also included is covering a portion of the gasket before applying the bonding member.

14. The method for manufacturing a battery cell according to claim 11, in, The adhesive member is configured as an adhesive surface provided on one surface of the gasket.

15. The method for manufacturing a battery cell according to claim 11, in, The adhesive member is configured as an adhesive surface provided on one surface of the exterior member.

16. A method for manufacturing a battery cell, the battery cell comprising: electrode assembly; a battery case having an opening at one side and configured to accommodate the electrode assembly; and a gasket disposed on an open side of the battery housing, the method comprising: installing the gasket onto the upper surface of the battery housing; wrapping the battery case with an exterior member so as to cover at least a portion of the gasket and the battery case; and An adhesive member is positioned on the outer edge of the outer member.

17. The method for manufacturing a battery cell according to claim 16, in, The adhesive member is configured as a tape having an adhesive surface formed on one surface of the tape.

18. The method for manufacturing a battery cell according to claim 16, in, The adhesive member is configured in the shape of a ring having a hole formed in the center of the ring.

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