Battery cell

Abstract

According to exemplary embodiments of the present invention, a battery cell may be provided. The battery cell may include: an electrode assembly including an electrode terminal; and a terminal assembly connected to the electrode assembly, wherein the terminal assembly includes: a busbar coupled to the electrode terminal and including a terminal part protruding in one direction; a cap housing including a terminal connection part penetrated by the terminal part; and an inner housing between the busbar and the electrode assembly.

Description

battery cell

[0001] The present invention relates to a battery cell. Specifically, the present invention relates to a battery cell having a terminal assembly.

[0002] This application claims the benefit of Korean application No. 10-2025-0006672, filed on January 16, 2025, which is incorporated herein by reference in its entirety.

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0004] The trend in the technological development of rechargeable batteries for mobility is the improvement of energy density and safety. The safety of rechargeable batteries is critical as it is directly linked to the lives of passengers. The safety of rechargeable batteries can be achieved through mechanical robustness, the reliability of electrical insulation, and the delay of heat transfer in the event of a thermal runaway event.

[0005] The problem that the technical concept of the present invention aims to solve is to provide a battery cell with improved space efficiency.

[0006] The problem that the technical concept of the present invention aims to solve is to provide a battery cell with improved processability.

[0007] The problem that the technical concept of the present invention aims to solve is to provide a battery cell with improved performance and reliability.

[0008] According to exemplary embodiments of the present invention for solving the above-described problem, a battery cell may be provided. The battery cell may include an electrode assembly including an electrode terminal; and a terminal assembly connected to the electrode assembly, wherein the terminal assembly may include a bus bar having a terminal portion protruding in one direction and coupled to the electrode terminal; a cap housing including a terminal connection portion penetrating by the terminal portion; and an inner housing between the bus bar and the electrode assembly.

[0009] In some embodiments, the terminal portion may include a first surface exposed to the outside by the cap housing.

[0010] In some embodiments, the front surface of the terminal connection portion and the first surface of the terminal portion may be a common surface.

[0011] In some embodiments, the second surface intersecting the first surface of the terminal portion and the terminal connection portion may be in direct contact.

[0012] In some embodiments, the terminal connection portion may be coupled to the terminal portion of the bus bar.

[0013] In some embodiments, the terminal connection may include metal.

[0014] In some embodiments, the inner housing includes a slot through which the electrode terminal passes, and the electrode terminal can pass through the slot and be coupled to the body portion of the busbar.

[0015] In some embodiments, the busbar may be fixed on the inner housing.

[0016] In some embodiments, a pad between the inner housing and the electrode assembly is further included, and the pad may comprise an elastic or compressible material.

[0017] In some embodiments, the cap housing may cover the busbar and the inner housing.

[0018] In some embodiments, the electrode terminal is located on one side of the electrode assembly in the X direction, and the terminal portion may protrude from the bus bar in the X direction.

[0019] According to exemplary embodiments of the present invention for solving the above-described problem, a battery cell may be provided. The battery cell comprises: electrode assemblies including a first electrode assembly and a second electrode assembly; a terminal assembly connected to the electrode assemblies; a separating sheet surrounding each of the first electrode assembly and the second electrode assembly; and a cell case surrounding the electrode assemblies outside the separating sheet, wherein the terminal assembly comprises a bus bar having a terminal portion that is coupled to the electrode terminal of each of the electrode assemblies; and a cap housing including a terminal connection portion that is penetrated by the terminal portion, and the terminal portion may include a surface exposed to the outside by the cap housing.

[0020] In some embodiments, an internal housing between the busbar and the electrode assemblies may be further included.

[0021] In some embodiments, a pad is further included between the inner housing and the electrode assemblies, and the pad may include an elastic or compressible material.

[0022] According to exemplary embodiments of the present invention, a busbar of a battery cell is provided with a terminal portion, which is exposed to the outside to facilitate electrical connection. By doing so, the shape of the busbar can be simplified, thereby improving processability. Additionally, the busbar is directly connected to an external electrical element, which can improve space efficiency and energy density.

[0023] According to exemplary embodiments of the present invention, a battery cell with improved space efficiency can be provided.

[0024] According to exemplary embodiments of the present invention, a battery cell with improved processability can be provided.

[0025] According to exemplary embodiments of the present invention, a battery cell with improved performance and reliability can be provided.

[0026] The effects obtainable from the exemplary embodiments of the present invention are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects resulting from the implementation of 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.

[0027] FIG. 1 is a perspective view of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0028] FIG. 2 is a perspective view of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0029] FIG. 3 is an exploded perspective view of a battery cell according to exemplary embodiments of the technical concept of the present invention.

[0030] FIG. 4 is an exploded perspective view illustrating a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0031] FIG. 5 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0032] FIG. 6 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0033] FIG. 7 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0034] FIG. 8 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0035] FIG. 9 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0036] FIG. 10 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0037] FIG. 11 is a cross-sectional view showing some components of a battery cell according to exemplary embodiments of the technical concept of the present invention.

[0038] FIG. 12 is a perspective view showing some components of a battery cell according to exemplary embodiments based on the technical concept of the present invention.

[0039] FIG. 13 is a cross-sectional view showing some components of a battery cell according to exemplary embodiments of the technical concept of the present invention.

[0040] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0041] Therefore, 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; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0042] In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted.

[0043] Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion.

[0044]

[0045] (1st embodiment)

[0046] FIG. 1 is a perspective view of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention.

[0047] FIG. 2 is a perspective view of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 2 is a perspective view of a battery cell (100) viewed from a different direction than FIG. 1.

[0048] FIG. 3 is an exploded perspective view of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 3 is an exploded perspective view for explaining the terminal assembly (130) of the battery cell (100) in the portion corresponding to the EX1 area of ​​FIG. 1.

[0049] FIG. 4 is an exploded perspective view for explaining a battery cell according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 4 is an exploded perspective view for explaining the electrode assembly (120) and the separator sheet (110) of the battery cell (100) in the portion corresponding to the EX1 area of ​​FIG. 1.

[0050] FIG. 5 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 5 is a perspective view showing an inner housing (133) and a bus bar (135) of a battery cell (100).

[0051] FIG. 6 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 6 is a perspective view showing a pad (131), an inner housing (133), and a bus bar (135) of a battery cell (100).

[0052] FIG. 7 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 7 is a perspective view showing the electrode terminal (120T) of an electrode assembly (120) connected to a bus bar (135).

[0053] FIG. 8 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 8 is a perspective view showing a cap housing (137) of a battery cell (100) and a terminal connection part (138) thereof.

[0054] FIG. 9 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 9 is a perspective view for explaining the coupling relationship between a bus bar (135) and a cap housing (137) of a battery cell (100).

[0055] FIG. 10 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 10 is a perspective view showing the combined appearance of a bus bar (135) and a cap housing (137) of a battery cell (100).

[0056] FIG. 11 is a cross-sectional view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 11 is a cross-sectional view along line I-I of FIG. 10.

[0057]

[0058] Referring to FIGS. 1 to 3, the battery cell (100) may include electrode assemblies (120), terminal assemblies (130), and a cell case (140). The battery cell (100) may further include an electrolyte within the cell case (140).

[0059] In the embodiments, the terminal assembly (130) may be arranged in the X direction with respect to the electrode assemblies (120). The cell case (140) may surround the electrode assemblies (120) and the terminal assembly (130) in the Y direction and the Z direction. In this specification, the X direction, the Y direction, and the Z direction may intersect each other.

[0060] In the embodiments, the terminal assembly (130) may be placed on both sides of the electrode assemblies (120). Specifically, the terminal assembly (130) may be placed on both sides of the electrode assemblies (120) in the X direction.

[0061] In the embodiments, the electrode assemblies (120) may include one or more electrode assemblies (121, 123, 125, and 127) arranged in the Y direction. For example, the electrode assemblies (120) may include a first electrode assembly (121), a second electrode assembly (123), a third electrode assembly (125), and a fourth electrode assembly (127) arranged in sequence in the Y direction.

[0062] In the embodiments, each of the electrode assemblies (120) may be either a jelly-roll type or a stack type. A jelly-roll type electrode assembly may include a wound structure of an anode, a cathode, and a separator interposed between them. A stack type electrode assembly may include a plurality of anodes, a plurality of cathodes, and a plurality of separators interposed between them that are sequentially stacked.

[0063] In the embodiments, each of the electrode assemblies (120) may include an electrode terminal (120T). Specifically, each of the electrode assemblies (120) may include an electrode terminal (120T) on one side in the X direction. For example, the first electrode assembly (121) may include a first electrode terminal (121T). The second electrode assembly (123) may include a second electrode terminal (123T). The third electrode assembly (125) may include a third electrode terminal (125T). The fourth electrode assembly (127) may include a fourth electrode terminal (127T).

[0064] In this embodiment, the terminal assembly (130) is disposed on both sides of the electrode assemblies (120) by exemplifying the case where the electrode terminals (120T) of the electrode assemblies (120) are formed on both sides, or the terminal assembly (130) may be disposed on only one side of the electrode assemblies (120) when the electrode terminals (120T) of the electrode assemblies (120) are formed in a unidirectional manner.

[0065] Referring together with FIG. 4, each of the electrode assemblies (120) may be surrounded by a separating sheet (110). Specifically, the separating sheet (110) may surround each of the electrode assemblies (120) in the Y direction and the Z direction. For example, the first electrode assembly (121) may be surrounded by the first separating sheet (111). The second electrode assembly (123) may be surrounded by the second separating sheet (113). The third electrode assembly (125) may be surrounded by the third separating sheet (115). The fourth electrode assembly (127) may be surrounded by the fourth separating sheet (117). Each of the separating sheets (110) may include a Solid Resin Separator (SRS), but is not limited thereto. Accordingly, a short circuit between the electrode assemblies (120) due to direct contact of the electrode assemblies (120) can be prevented.

[0066] In the embodiments, the terminal assembly (130) may be coupled with the electrode assemblies (120). The terminal assembly (130) may include an inner housing (133), a busbar (135), and a cap housing (137).

[0067] Referring together with FIG. 5, the inner housing (133) can be placed between the bus bar (135) and the electrode assemblies (120).

[0068] In the embodiments, the inner housing (133) may include slots (134). The inner housing (133) may include a plurality of slots (134) arranged in the Y direction. For example, when the electrode assemblies (120) include four electrode assemblies (121, 123, 125, and 127) arranged in the Y direction, the inner housing (133) may include four slots (134). The slots (134) may be positioned at locations corresponding to the electrode terminals (120T) of the electrode assemblies (120). The slots (134) may be penetrated by the electrode terminals (120T). The electrode terminals (120T) may penetrate the slots (134) in the X direction. The inner housing (133) may further include a plurality of holes (133H). Heat and gases, etc., may be discharged through the plurality of holes (133H). The inner housing (133) may include an insulating material. For example, the inner housing (133) may include an insulating material such as polypropylene.

[0069] In the embodiments, the busbar (135) may include a terminal portion (136) protruding in one direction. For example, the terminal portion (136) may protrude in the X direction. For example, the terminal portion (136) may protrude in the opposite direction to the direction in which the busbar (135) faces the electrode assembly (120). The busbar (135) may include a conductive material. The busbar (135) may include a metal, for example, aluminum. In the embodiments, the terminal portion (136) of the busbar (135) may be directly exposed outside the battery cell (100), which will be described in detail below.

[0070] In the embodiments, the busbar (135) may include a body portion (135B). The body portion (135B) may be a portion to which an electrode terminal (120T) is coupled. For example, the electrode terminal (120T) may pass through a slot (134) of the inner housing (133) and be coupled to the body portion (135B) of the busbar (135). For example, the busbar (135) may include a first body portion (135B1) and a second body portion (135B2) spaced apart in the Y direction. The first body portion (135B1) and the second body portion (135B2) may not overlap with the slot (134) of the inner housing (133) in the X direction, respectively.

[0071] In the embodiments, the busbar (135) may be seated on and fixed thereto an inner housing (133). For example, the inner housing (133) may include a protrusion (133P) protruding in the X direction. The busbar (135) may include a plurality of holes (135H) at positions corresponding to the protrusion (133P) of the inner housing (133). For example, the plurality of holes (135H) may be provided in the body portion (135B) of the busbar (135). Specifically, each of the protrusions (133P) of the inner housing (133) may be coupled to a corresponding one of the plurality of holes (135H) of the busbar (135). Each of the protrusions (133P) of the inner housing (133) can be fitted into a corresponding hole (135H) of the bus bar (135), and then the bus bar (135) can be fixed on the inner housing (133) by heating and pressing.

[0072] Referring again to FIG. 3, the terminal assembly (130) may further include a pad (131). Specifically, the pad (131) may be placed between the electrode assemblies (120) and the inner housing (133). The pad (131) may include an elastic or compressible material. The pad (131) may include, for example, polyurethane. The pad (131) may serve to absorb and mitigate shock between the electrode assemblies (120) and the remaining components of the terminal assembly (130).

[0073] Referring together with FIG. 6, the pad (131) may include slots (132). The pad (131) may include a plurality of slots (132) arranged in the Y direction. For example, if the electrode assemblies (120) include four electrode assemblies (121, 123, 125, and 127) arranged in the Y direction, the pad (131) may include four slots (132). The slots (132) may be positioned at a location corresponding to the electrode terminals (120T) of the electrode assemblies (120). The slots (132) may be positioned at a location corresponding to the slots (134) of the inner housing (133). The slots (132) may be penetrated by the electrode terminals (120T). The electrode terminals (120T) may penetrate the slots (132) in the X direction.

[0074] Referring to FIG. 7, the electrode terminal (120T) can be bent and fixed to the bus bar (135). Specifically, the electrode terminal (120T) can be bent and fixed to the bus bar (135) after passing through the slot (132) of the pad (131) and the slot (134) of the inner housing (133) in sequence. For example, the first electrode terminal (121T) of the first electrode assembly (121) can be bent and coupled to the first body portion (135B1) of the bus bar (135) after passing through the slot (132) of the pad (131) and the slot (134) of the inner housing (133) in sequence. The first electrode terminal (121T) can be fixed to the bus bar (135) by welding. Likewise, the second electrode terminal (123T) of the second electrode assembly (123) can be bent and coupled to the first body portion (135B1) of the busbar (135) after passing through the slot (132) and the slot (134) in sequence. The third electrode terminal (125T) of the third electrode assembly (125) can be bent and coupled to the second body portion (135B2) of the busbar (135) after passing through the slot (132) and the slot (134) in sequence. The fourth electrode terminal (127T) of the fourth electrode assembly (127) can be bent and coupled to the second body portion (135B2) of the busbar (135) after passing through the slot (132) and the slot (134) in sequence. For example, the first electrode terminal (121T) and the second electrode terminal (123T) are in contact with each other and can be coupled to the first body portion (135B1) of the bus bar (135). The third electrode terminal (125T) and the fourth electrode terminal (127T) are in contact with each other and can be coupled to the second body portion (135B2) of the bus bar (135).

[0075] Referring together with FIG. 8, the cap housing (137) may include a terminal connection portion (138). The cap housing (137) may include an insulating material and may include a first hole (137H). The terminal connection portion (138) may include a conductive material and may include a second hole (138H). The terminal connection portion (138) may include a metal, for example, aluminum. The terminal connection portion (138) may be attached to the cap housing (137) by a rivet fixing method. For example, the rivet portion of the terminal connection portion (138) may be inserted into the first hole (137H), and then the rivet portion may be deformed and fixed. By doing so, the second hole (138H) of the terminal connection portion (138) may overlap with the first hole (137H). As illustrated in FIG. 1, the cap housing (137) can cover the inner housing (133) and the bus bar (135).

[0076] Referring to FIGS. 9, 10, and 11 together, the bus bar (135) can be coupled to the cap housing (137). In FIG. 9, only the bus bar (135) and the cap housing (137) are shown, but this is for convenience of explanation, and the bus bar (135) coupled with the electrode terminal (120T), as exemplified in FIG. 7, can be coupled to the cap housing (137).

[0077] Specifically, the terminal portion (136) of the bus bar (135) can be coupled to the terminal connection portion (138). For example, the terminal portion (136) can penetrate the terminal connection portion (138). The terminal portion (136) can penetrate the cap housing (137). For example, the terminal portion (136) can penetrate the second hole (138H) of the terminal connection portion (138). The terminal portion (136) can penetrate the first hole (137H) of the cap housing (137).

[0078] Specifically, the terminal portion (136) may come into direct contact with the terminal connection portion (138). The terminal portion (136) may come into contact with the inner surface of the second hole (138H) of the terminal connection portion (138). The terminal portion (136) may not come into contact with the inner surface of the first hole (137H) of the cap housing (137) with the terminal connection portion (138) in between.

[0079] In the embodiments, at least a portion of the terminal portion (136) may be exposed by the cap housing (137). For example, at least a portion of the terminal portion (136) may be exposed by the terminal connection portion (138).

[0080] Specifically, the terminal portion (136) may include a first surface (136_S1) exposed by the terminal connection portion (138). The first surface (136_S1) may intersect with the X direction. As illustrated in FIG. 11, the first surface (136_S1) of the terminal portion (136) may be co-surface with the front surface (138_FS) of the terminal connection portion (138).

[0081] In the embodiments, the terminal connection portion (138) may be electrically connected to the terminal portion (136). The terminal portion (136) may include a second surface (136_S2) that intersects the first surface (136_S1). The second surface (136_S2) may be in direct contact with the terminal connection portion (138). The second surface (136_S2) may be in direct contact with the inner surface of the second hole (138H) of the terminal connection portion (138).

[0082] Referring again to FIG. 1, the battery cell (100) may further include a cell case (140) that encloses electrode assemblies (120). The cell case (140) may enclose the electrode assemblies (120) in the Y direction and the Z direction. Specifically, the cell case (140) may enclose the electrode assemblies (120) outside the separation sheet (110). The cell case (140) may enclose a terminal assembly (130). The cell case (140) may enclose a cap housing (137) of the terminal assembly (130).

[0083] The cell case (140) may be a pouch case comprising an aluminum laminate sheet. The cell case (140) may include an inner resin layer, a metal layer, and an outer resin layer. The inner resin layer may have heat-sealability, thereby enabling sealing of the cell case (140). The inner resin layer may include, for example, a polyolefin-based material. The metal layer may include any one of an alloy of iron, carbon, chromium, and manganese, an alloy of iron, chromium, and nickel, and aluminum.

[0084]

[0085] According to exemplary embodiments of the technical concept of the present invention described with reference to FIGS. 1 to 11, a busbar (135) having a terminal portion (136) is provided, and the terminal portion (136) may be exposed to the outside by a cap housing (137). The terminal portion (136) is exposed to the outside and can mediate an electrical connection with an external electrical element. By doing so, the shape of the busbar can be simplified, and processability can be improved. In addition, the busbar (135) is directly connected to an external electrical element, so that space efficiency is improved and energy density is improved.

[0086] According to exemplary embodiments of the technical concept of the present invention, a battery cell (100) with improved space efficiency may be provided.

[0087] According to exemplary embodiments based on the technical concept of the present invention, a battery cell (100) with improved processability may be provided.

[0088] According to exemplary embodiments based on the technical concept of the present invention, a battery cell (100) with improved performance and reliability may be provided.

[0089]

[0090] (2nd Example)

[0091] FIG. 12 is a perspective view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 12 is a perspective view showing the busbar (135) and cap housing (137) of the battery cell (100) combined, showing an embodiment different from that described with reference to FIG. 10.

[0092] FIG. 13 is a cross-sectional view showing some components of a battery cell (100) according to exemplary embodiments of the technical concept of the present invention. Specifically, FIG. 13 is a cross-sectional view along line II-II of FIG. 12.

[0093] Referring to FIGS. 12 and 13, the terminal portion (136A) of the bus bar (135) can be coupled to the terminal connection portion (138). Specifically, the terminal portion (136A) can penetrate the second hole (138H) of the terminal connection portion (138). The terminal portion (136A) can penetrate the first hole (137H) of the cap housing (137). The terminal portion (136A) can be in direct contact with the terminal connection portion (138). The terminal portion (136A) can be in contact with the inner surface of the second hole (138H) of the terminal connection portion (138). At least a portion of the terminal portion (136A) can be exposed by the cap housing (137). For example, at least a portion of the terminal portion (136A) can be exposed by the terminal connection portion (138).

[0094] In the embodiments, the terminal portion (136A) may include a first surface (136A_S1) exposed by the terminal connection portion (138). The first surface (136A_S1) may intersect with the X direction. As illustrated in FIG. 13, the first surface (136A_S1) of the terminal portion (136A) may not be located in a co-plane with the front surface (138_FS) of the terminal connection portion (138). For example, the terminal portion (136A) may extend longer than the terminal connection portion (138) and have a shape that protrudes in the X direction. For example, the second surface (136A_S2) of the terminal portion (136A) may include at least a portion exposed by the terminal connection portion (138).

[0095] In the embodiments, the terminal connector (138) may be electrically connected to the terminal portion (136A). The terminal portion (136A) may include a second surface (136A_S2) that intersects the first surface (136A_S1). The second surface (136A_S2) may be in direct contact with the terminal connector (138). The second surface (136A_S2) may be in direct contact with the inner surface of the second hole (138H) of the terminal connector (138).

[0096] According to exemplary embodiments of the technical concept of the present invention, a battery cell (100) with improved space efficiency may be provided.

[0097] According to exemplary embodiments based on the technical concept of the present invention, a battery cell (100) with improved processability may be provided.

[0098] According to exemplary embodiments based on the technical concept of the present invention, a battery cell (100) with improved performance and reliability may be provided.

[0099]

[0100] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. An electrode assembly including electrode terminals; and A terminal assembly connected to the electrode assembly, wherein The above terminal assembly is, A bus bar coupled to the above electrode terminal and including a terminal portion protruding in one direction; A cap housing including a terminal connection portion penetrating through the above terminal portion; and A battery cell comprising an internal housing between the busbar and the electrode assembly.

2. In Paragraph 1, A battery cell comprising a terminal portion including a first surface exposed to the outside by the cap housing.

3. In Paragraph 2, A battery cell in which the front surface of the terminal connection portion and the first surface of the terminal portion are co-planes.

4. In Paragraph 2, A battery cell in which a second surface intersecting the first surface of the terminal portion and the terminal connection portion are in direct contact.

5. In Paragraph 1, A battery cell, wherein the terminal connection portion is coupled to the terminal portion of the busbar.

6. In Paragraph 1, The above terminal connection part comprises a metal, forming a battery cell.

7. In Paragraph 1, The above inner housing includes a slot penetrated by the electrode terminal, and A battery cell in which the electrode terminal passes through the slot and is coupled to the body of the busbar.

8. In Paragraph 1, The above busbar is a battery cell fixed on the above inner housing.

9. In Paragraph 1, It further includes a pad between the inner housing and the electrode assembly, The above pad is a battery cell comprising an elastic or compressible material.

10. In Paragraph 1, The above cap housing is a battery cell that covers the busbar and the inner housing.

11. In Paragraph 1, The electrode terminal is located on one side of the electrode assembly in the X direction, and The above terminal portion is a battery cell protruding in the X direction from the bus bar.

12. Electrode assemblies including a first electrode assembly and a second electrode assembly; Terminal assembly connected to the above electrode assemblies; A separating sheet surrounding each of the first electrode assembly and the second electrode assembly; and A cell case that encloses the electrode assemblies on the outside of the separation sheet, wherein The above terminal assembly is, A busbar having a terminal portion that is coupled to each electrode terminal of the above electrode assemblies; and It includes a cap housing comprising a terminal connection portion penetrating through the above terminal portion, and A battery cell, wherein the terminal portion includes a surface exposed to the outside by the cap housing.

13. In Paragraph 12, A battery cell further comprising an internal housing between the busbar and the electrode assemblies.

14. In Paragraph 13, It further includes a pad between the inner housing and the electrode assemblies, The above pad is a battery cell comprising an elastic or compressible material.

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