Battery, battery pack and vehicle with it

Abstract

battery, featuring an electrode assembly comprising a first electrode, a second electrode and a separator arranged between the first electrode and the second electrode, wound around a winding axis defining a core and an outer circumferential surface, wherein the first electrode has a first active mass region coated with an active mass layer along a winding direction and a first uncoated region not coated with the active mass layer, and at least part of the first uncoated region itself is used as an electrode tab, wherein the second electrode has a second active mass area coated with an active mass layer along the winding direction and a second uncoated area not coated with the active mass layer, wherein at least part of the second uncoated area itself is used as an electrode tab; a battery housing with an open section on one side and a closed section on the other side, wherein the battery housing accommodates the electrode assembly through the open section, a first current collector in which battery housing is accommodated and which is coupled to at least part of the first uncoated area on the side of the closed section; a connection that is exposed to the outside of the battery housing and is electrically connected to the first uncoated area, an insulating seal that is positioned between the battery housing and the terminal to prevent electrical contact between the battery housing and the terminal, an insulator arranged between the enclosed section and the first current collector to prevent an electrical connection between the battery casing and the first uncoated area, wherein the insulator has a central opening through which the connection for coupling to the first uncoated area extends, wherein the central opening has a width that is greater than a maximum width of a combination of connection and insulating seal within the battery housing, and wherein a second current collector is incorporated in the battery housing, which is coupled to at least a part of the second uncoated area on the side of the opening section and is electrically connected to the battery housing.

Description

TECHNICAL AREA

[0001] The present disclosure relates to a battery, a battery pack, and a vehicle therewith. In particular, the present disclosure relates to a battery with a structure in which a positive electrode terminal and a negative electrode terminal are arranged close together on a single side of the battery without significantly altering the structure of existing batteries, and to a battery pack and a vehicle therewith.

[0002] The present application claims priority over Korean patent application no. 10-2021-0007278, filed on January 19, 2021; Korean patent application no. 10-2021-0022897, filed on February 19, 2021; Korean patent application no. 10-2021-0022894, filed on February 19, 2021; Korean patent application no. 10-2021-0022891, filed on February 19, 2021; Korean patent application no. 10-2021-0022881, filed on February 19, 2021; Korean patent application no. 10-2021-0024424, filed on February 19, 2021; and Korean patent application no. 10-2021-0024424, filed on February 23, 2021. No. 10-2021-0030300, of the Korean patent application No. 10-2021-0030291 filed on March 8, 2021, of the Korean patent application No. 10-2021-0046798 filed on March 8, 2021, of the Korean patent application No. 10-2021-0058183 filed on April 9, 2021, of the Korean patent application No. 10-2021-0058183 filed on May 4, 202110-2021-0077046, the Korean patent application No. 10-2021-0084326 filed on June 14, 2021, the Korean patent application No. 10-2021-0131225 filed on June 28, 2021, the Korean patent application No. 10-2021-0131215 filed on October 1, 2021, the Korean patent application No. 10-2021-0131205 filed on October 1, 2021, the Korean patent application No. 10-2021-0131208 filed on October 1, 2021, the Korean patent application No. 10-2021-0131207 filed on October 1, 2021 Korean patent application No. 10-2021-0137001, filed on October 14, 2021, Korean patent application No. 10-2021-0137856, filed on October 15, 2021, Korean patent application No. 10-2021-0142196, filed on October 22, 2021, Korean patent application No. 10-2021-0153472, filed on November 9, 2021, Korean patent application No. 10-2021-0160823, filed on November 19, 2021.Korean patent application no. 10-2021-0163809, filed on November 2021, Korean patent application no. 10-2021-0165866, filed on November 24, 2021, Korean patent application no. 10-2021-0172446, filed on November 26, 2021, Korean patent application no. 10-2021-0177091, filed on December 3, 2021, Korean patent application no. 10-2021-0194593, filed on December 10, 2021, Korean patent application no. 10-2021-0194610, filed on December 31, 2021 10-2021-0194572, the Korean patent application No. 10-2021-0194612 filed on December 31, 2021, the Korean patent application No. 10-2021-0194611 filed on December 31, 2021 and the Korean patent application No. 10-2021-0001802 filed on January 5, 2022, the disclosure content of which is incorporated herein by reference in its entirety. STATE OF THE ART

[0003] In a battery, a jellyroll structure with a positive electrode tab and a negative electrode tab extending upwards and downwards respectively along the vertical direction of a battery casing can be used to maximize current collection efficiency.

[0004] According to the structure described above, the positive and negative electrode tabs extend vertically to opposite sides of the jellyroll structure, creating the possibility that the positive electrode tab could touch the battery casing. If the battery casing is electrically connected to the negative electrode tab, an additional contact between the positive electrode tab and the battery casing could cause a short circuit. A short circuit within the battery could lead to overheating or explosion. Therefore, an insulating element is required to effectively prevent electrical contact between the upward-extending positive electrode tab and the battery casing.

[0005] Therefore, there is a need for an approach to provide a battery with low internal resistance and a low short-circuit risk, as well as a battery pack and a vehicle with the same.

[0006] Additionally, the battery with the structure described above may have a cavity, particularly between the positive electrode tab and the upper surface of the battery casing, or between the positive electrode current collector and the upper surface of the battery casing. This cavity can cause the jellyroll structure to move within the battery casing, especially along the vertical direction, i.e., the height of the battery. If the jellyroll structure moves vertically, damage may occur to the coupling between the current collector and the uncoated area, as well as to the coupling between the current collector and the battery casing, and to the coupling between the current collector and the terminal.

[0007] Therefore, it is necessary to minimize the movement space of the jellyroll structure. Additionally, using an extra component to reduce the movement space of the jellyroll structure can increase process complexity and manufacturing costs; thus, there is a need to solve the problem by making good use of an existing component.

[0008] Meanwhile, the form factor of batteries used in electric vehicles is increasing. This means that, compared to the existing 1865 and 2170 form factor batteries, the diameter and height of batteries are increasing. The increased form factor results in higher energy density, improved thermal runaway resistance, and better cooling efficiency.

[0009] The energy density of batteries can be further increased by minimizing unnecessary space within the battery casing as the form factor increases. Therefore, it is necessary to optimize the design of an electrical insulation component between the electrode assembly and the battery casing to ensure electrical insulation and increase battery capacity. DETAILED DESCRIPTION TECHNICAL TASK

[0010] The present disclosure is intended to solve the problem described above, and therefore the present disclosure aims to reduce the internal resistance of a battery and to effectively prevent an internal short circuit.

[0011] Furthermore, the present disclosure aims to prevent damage to an electrical coupling component due to movement of an electrode assembly in a battery housing.

[0012] Furthermore, the present disclosure aims to prevent movement of an electrode assembly using existing components in the manufacture of a battery, thereby preventing an increase in the manufacturing process complexity and manufacturing costs through the use of an additional component.

[0013] Furthermore, the present disclosure aims to optimize the structure of a component for the electrical insulation of the electrode assembly in order to minimize unnecessary space within larger form factor batteries in order to maximize energy density.

[0014] However, the technical problem of the present disclosure is not limited to the problem described above, and other problems not mentioned here will be clear to those skilled in the art from the following description. TECHNICAL SOLUTION

[0015] To solve the problem described above, a battery according to an embodiment of the present disclosure comprises an electrode assembly comprising a first electrode, a second electrode and a separator arranged between the first electrode and the second electrode, which are wound around a winding axis defining a core and an outer circumferential surface, wherein the first electrode comprises a first active mass region coated with an active mass layer along a winding direction and a first uncoated region not coated with the active mass layer, and at least a part of the first uncoated region itself is used as an electrode tab; a first current collector that is coupled to at least part of the first uncoated area on the electrode assembly; a battery housing to accommodate the electrode assembly and the first current collector; and an insulator arranged between the first uncoated area and / or the first current collector and an inner surface of the battery housing facing the at least one of the first uncoated area and the first current collector to prevent an electrical connection between the battery housing and the at least one of the first uncoated area and the first current collector.

[0016] In one aspect of the present disclosure, the insulator may comprise a first covering section that covers an end of the first uncoated area and / or a surface of the first current collector that faces the inner surface of the battery housing; and a second covering section that covers an upper part of the outer circumferential surface of the electrode assembly.

[0017] Preferably, the second cover section can extend vertically downwards from an outer circumference of the first cover section.

[0018] Preferably, the first current collector can be coupled to the first uncoated area on the electrode assembly and arranged between the first uncoated area and the insulator.

[0019] Here, the first cover section can cover an area of ​​the first current collector that faces an upper inner surface of the battery housing.

[0020] Preferably, the first cover section can have a thickness corresponding to a distance between the first current collector and an upper inner surface of the battery housing.

[0021] In another aspect of the present disclosure, at least a part of the first uncoated area can be divided into a plurality of segments along the winding direction of the electrode assembly.

[0022] Here, the multitude of segments can be bent along a radial direction of the electrode assembly.

[0023] Preferably, the multitude of segments can overlap each other in several layers along a radial direction of the electrode assembly.

[0024] In this case, the insulator may comprise a first covering section located between a curved surface formed by the bending of the plurality of segments of the first uncoated area and the inner surface of the battery housing and / or between the first current collector and the inner surface of the battery housing; and a second covering section covering an upper part of an outer circumferential surface of the electrode assembly.

[0025] Here, the first current collector can be coupled to the curved surface on the electrode assembly and positioned between the curved surface and the insulator.

[0026] Preferably, the first covering section can cover an area of ​​the first current collector that faces an upper inner surface of the battery housing.

[0027] Preferably, the first cover section can have a thickness corresponding to the distance between the first current collector and the upper inner surface of the battery housing.

[0028] In another aspect of the present disclosure, the second covering section can cover an entire exposed outermost side of the first uncoated area to prevent the first uncoated area from being exposed towards an inner circumferential surface of the battery housing.

[0029] For example, the extended length of the second covered section can be greater than or equal to the extended length of the first uncoated area.

[0030] Preferably, an extended length of the second cover section can be greater than or equal to a length from a lower endpoint of a section line between the plurality of segments to a bend point of the plurality of segments.

[0031] Preferably, a lower end of the second covering section can be arranged at a lower location than a lower end of the first uncoated area.

[0032] In another aspect of the present disclosure, the insulator may comprise an insulating polymer material.

[0033] In another aspect of the present disclosure, the insulator can be formed from a material with elastic properties.

[0034] In another aspect of the present disclosure, the insulator may have a central opening with a predetermined diameter in the center of the first cover section.

[0035] Here, the center of the first current collector and the winding center of the electrode assembly can be arranged on the same line.

[0036] In another aspect of the present disclosure, the diameter of the first current collector can be less than or equal to the diameter of the central opening of the insulator.

[0037] Preferably, the diameter of the first current collector can be larger than the diameter of a central winding opening of the electrode assembly.

[0038] Preferably, the first covering section can have a thickness corresponding to a distance between an end of the first uncoated area and an upper inner surface of the battery housing.

[0039] In another aspect of the present disclosure, at least a part of the first uncoated area can be divided into a plurality of segments along the winding direction of the electrode assembly.

[0040] Here, the multitude of segments can be bent along a radial direction of the electrode assembly.

[0041] Preferably, the multitude of segments can overlap each other in several layers along a radial direction of the electrode assembly.

[0042] Preferably, the first covering section can be arranged between a curved surface formed by the bending of the plurality of segments of the first uncoated area facing an upper inner surface of the battery housing and the upper inner surface of the battery housing.

[0043] Preferably, the first cover section can have a thickness corresponding to the distance between the curved surface and the upper inner surface of the battery housing.

[0044] In another aspect of the present disclosure, the battery may further comprise a terminal that is electrically connected to the first uncoated area, wherein at least part of the terminal is exposed through a through-hole on the top of the battery housing.

[0045] In this case, the connection may comprise a body section inserted into the through-hole: an outer flange section extending from a side circumference of the body section exposed by an upper outer surface of the battery housing along the outer surface; an inner flange section extending from an opposite side circumference of the body section exposed by an upper inner surface of the battery housing to the inner surface; and a flat section provided within the inner flange section.

[0046] Preferably, the flat section and the upper inner surface of the battery housing can be parallel to each other.

[0047] Preferably, the flat section and the first current collector can be parallel to each other.

[0048] In another aspect of the present disclosure, the body section, the inner flange section and the flat section of the connector can be inserted through the through-hole into the battery housing.

[0049] For example, the inner flange section can be riveted and fastened to the upper inner surface of the battery housing.

[0050] In another aspect of the present disclosure, the diameter of the central opening of the insulator can be greater than or equal to the diameter of the body segment.

[0051] In another aspect of the present disclosure, the diameter of the central opening of the insulator can be greater than or equal to the diameter of the inner flange section.

[0052] In another aspect of the present disclosure, the body section of the connection can pass through the central opening of the insulator.

[0053] Preferably, the flat section of the connection can be electrically coupled to the first current collector through the central opening of the insulator.

[0054] For example, the flat section of the connection can be coupled to the first current collector by welding.

[0055] In another aspect of the present disclosure, the battery may further comprise an insulating seal arranged between the battery housing and the terminal to prevent electrical contact between the battery housing and the terminal.

[0056] Preferably, the insulating seal can be connected to the insulator and formed integrally with it.

[0057] In another aspect of the present disclosure, the battery may further comprise a side spacer that covers at least a portion of an outer circumferential surface of the electrode assembly and contacts an inner circumferential surface of the battery housing.

[0058] Here, the side spacer can cover at least part of an outer circumferential surface of the electrode assembly along an outer circumference of the electrode assembly.

[0059] Preferably, the side spacer can have a thickness that corresponds to a distance between an outer circumferential surface of the electrode assembly and an inner circumferential surface of the battery housing.

[0060] In another aspect of the present disclosure, the side spacer can be connected to the insulator and formed integrally with it.

[0061] In another aspect of the present disclosure, the side spacer may comprise an insulating polymer material.

[0062] In another aspect of the present disclosure, the side spacer can be formed from a material with elastic properties.

[0063] In another aspect of the present disclosure, the second electrode may have a second active mass area coated with an active mass layer along the winding direction, and a second uncoated area not coated with the active mass layer, and at least part of the second uncoated area itself may be used as an electrode tab.

[0064] In another aspect of the present disclosure, the battery may further comprise a second current collector coupled to the second uncoated area below the electrode assembly.

[0065] In another aspect of the present disclosure, the battery casing may have a beaded section formed at one end adjacent to an opening section formed on the underside and pressed inwards; and a crimped section formed on a side closer to the opening section than the beaded section, and extending towards the opening section and bent.

[0066] In another aspect of the present disclosure, the second current collector may have at least one lug coupling section coupled to the second uncoated area; and at least one housing coupling section electrically coupled to the corrugated section of the inner surface of the battery housing.

[0067] Preferably, the housing coupling section can be compressed and fixed by the crimp section.

[0068] In another aspect of the present disclosure, the housing coupling section can be coupled to the beaded section by welding.

[0069] In another aspect of the present disclosure, the battery may further comprise a cap for covering the opening section of the battery housing.

[0070] In another aspect of the present disclosure, the battery may further comprise a lower spacer arranged between the cap and the second current collector to prevent movement of the electrode assembly.

[0071] Preferably, the lower spacer can have a height that corresponds to a distance between the second current collector and the cap.

[0072] In another aspect of the present disclosure, the lower spacer may comprise an insulating polymer material.

[0073] In another aspect of the present disclosure, the lower spacer can be formed from a material with elastic properties.

[0074] In another aspect of the present disclosure, the thickness of the first covering section may differ from the thickness of the second covering section.

[0075] Preferably, the thickness of the second cover section can be less than the thickness of the first cover section.

[0076] In another aspect of the present disclosure, the first covering section may comprise a circular section with a predetermined radius of curvature on an outer circumference of the first covering section.

[0077] Preferably, the round section can be formed at an intersection between an upper surface of the first cover section and a side of the second cover section.

[0078] Preferably, the radius of curvature of the round section can be less than or equal to a radius of curvature formed at the intersection between the upper inner surface of the battery housing and the side of the battery housing.

[0079] Preferably, the round section can come into close contact with the inner surface of the battery housing without any gaps.

[0080] In another aspect of the present disclosure, the first covering section and the second covering section can be formed in one piece.

[0081] Alternatively, the first cover section and the second cover section can be formed separately and combined with each other.

[0082] In another aspect of the present disclosure, the insulating gasket may have a gasket exposure section arranged between the outer flange section and the battery housing; and a gasket insertion section arranged between the inner flange section and the battery housing.

[0083] Preferably, the seal exposure section and the seal insertion section can have different thicknesses for each location.

[0084] In another aspect of the present disclosure, a plurality of openings with a smaller diameter than the central opening can also be formed around the central opening of the first cover section.

[0085] Meanwhile, a battery pack according to one embodiment of the present disclosure comprises a plurality of batteries according to one embodiment of the present disclosure as described above and a pack housing for receiving the plurality of batteries.

[0086] A vehicle according to an embodiment of the present disclosure has the battery pack according to an embodiment of the present disclosure as described above. EFFECTS OF THE INVENTION

[0087] According to the present disclosure, it is possible to provide a battery structure with a structure in which a positive electrode terminal and a negative electrode terminal are used in the same direction, thereby simplifying an electrical connection structure for a variety of batteries.

[0088] Additionally, according to the present disclosure, it is possible to effectively prevent an internal short circuit of a battery by preventing electrical contact between the uncoated area and the battery casing.

[0089] Furthermore, according to the present disclosure, it is possible to minimize the movement of the electrode assembly in the battery housing, thereby preventing damage to an electrical coupling part.

[0090] According to another aspect of the present disclosure, it is possible to provide a sufficient area for welding between the electrode terminal of the battery and an electrical connection component such as a busbar, thereby ensuring sufficient connection strength between the electrode terminal and the electrical connection component and reducing the resistance at the weld joint between the electrical connection component and the electrode terminal to a desired level. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The accompanying drawings illustrate a preferred embodiment of the present disclosure and, together with the detailed description of the present disclosure described below, serve to provide a further understanding of the technical aspects of the present disclosure, and therefore the present disclosure should not be interpreted as being limited to the drawings. Fig. Figure 1 is a representation describing a battery according to an embodiment of the present disclosure. Fig. Figure 2 is a vertical cross-sectional view of the battery. Fig. 1. Fig. Figure 3 is a perspective view showing the interior of the battery. Fig. 1 shows. Fig. Figure 4 is a cross-sectional view to describe the interior of the battery. Fig. 1. Fig. Figure 5a is a representation describing a battery according to an embodiment of the present disclosure. Fig. 5b to Fig. 5e are diagrams for describing a battery according to a further embodiment of the present disclosure. Fig. 6 and Fig. Figure 7 are illustrations for describing a battery according to yet another embodiment of the present disclosure. Fig. 8 and Fig. Figure 9 are illustrations for describing a cylindrical secondary battery according to yet another embodiment of the present disclosure. Fig. Figure 10 is a diagram describing a battery pack with the battery of Fig. 1. Fig. Figure 11 is a diagram describing a vehicle with the battery pack of Fig. 10. DETAILED DESCRIPTION

[0092] Preferred embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. At the outset of this description, it should be understood that the terms or words used in the description and the accompanying claims should not be interpreted as being limited to general and literal meanings, but rather should be interpreted on the basis of the meanings and concepts corresponding to the technical aspects of the present disclosure, based on the principle that the inventor may appropriately define the terms for the best possible explanation.

[0093] Therefore, the embodiments and illustrations described here, shown in the drawings, are only some of the most preferred embodiments of the present disclosure, but are not intended to fully describe the technical aspects of the present disclosure, so it is understood that various other correspondences and modifications to it may have been made at the time of filing the application.

[0094] In addition, to facilitate understanding of the present disclosure, the accompanying drawings may illustrate some elements in exaggerated dimensions, not to actual scale. Furthermore, the same element may be designated with the same reference numeral in different embodiments.

[0095] When two components are described as equivalent, this means they are "essentially the same." Accordingly, "essentially the same" can encompass all cases where the deviation is considered low within the relevant technical field, for example, a deviation of 5% or less. Additionally, a uniform parameter can be uniform from an average perspective within a predetermined range.

[0096] Although terms like first, second, or similar are used to describe different elements, these elements are not restricted by these terms. These terms are used to distinguish one element from another, and unless otherwise specified, a first element can be a second element.

[0097] In the entire description, each element can be singular or multiple unless otherwise specified.

[0098] When an element is located “above (or below)” or “on (or below)” another element, the element may be located on a top face (or a bottom face) of the other element, and intermediate elements may be located between the element and the other element on (or below) the element.

[0099] If, in addition, an element is described as being "connected", "coupled", or "linked" to or with another element, the element may be directly connected or coupled to the other element, but it is understood that intermediate elements may exist between each element, or each element may be "connected", "coupled", or "linked" to another element.

[0100] Throughout this description, “A and / or B” refers to either A or B or both A and B, unless expressly stated otherwise, and “C to D” refers to C or greater and D or lesser, unless expressly stated otherwise.

[0101] For the sake of simplicity, a direction running along the longitudinal axis of a winding of an electrode arrangement wound in a coil form is referred to here as an axial direction Y. Additionally, a direction around the winding axis is referred to here as a circumferential direction X. Furthermore, a direction approaching or pointing away from the winding axis is referred to as a radial direction. Among these, the direction approaching the winding axis is specifically called a centripetal direction, and the direction pointing away from the winding axis is called a centrifugal direction.

[0102] With reference to Fig. 1 to Fig. 4, Fig. 8 and Fig. 9 a battery 1 according to an embodiment of the present disclosure comprises an electrode assembly 10, a battery housing 20, a first current collector 30 and an insulator 40.

[0103] In addition to the elements described above, the battery 1 may also have a terminal 50 and / or an insulating seal 60 and / or a side spacer 70 and / or a second current collector 80 and / or a cap 90 and / or a seal 100 and / or a lower spacer 110.

[0104] The electrode assembly 10 comprises a first electrode with a first polarity, a second electrode with a second polarity, and a separator arranged between the first and second electrodes. The first electrode corresponds to a positive or negative electrode, and the second electrode corresponds to an electrode with the opposite polarity to the first electrode.

[0105] The electrode assembly 10 can, for example, have a wound form. That is, the electrode assembly 10 can be produced by winding a stack around a winding center C, wherein the stack is formed by at least a single stacking of the first electrode, the second electrode, and the separator arranged between the first and second electrodes. In this case, an additional separator can be provided on the outer circumferential surface of the electrode assembly 10 for insulation from the battery housing 20. The electrode assembly 10 can, without restriction, have any winding structure known in the related technical field.

[0106] The first electrode has a first electrode current collector and a first active mass region coated on one or two surfaces of the first electrode current collector. An uncoated region without a first active mass region exists at one end in the lateral direction of the first electrode current collector (a direction parallel to the Z-axis). The uncoated region itself acts as a first electrode tab. The first uncoated region 11 is provided on the electrode assembly 10, which is accommodated in the battery housing 20 in the vertical direction (the direction parallel to the Z-axis).

[0107] The second electrode has a second electrode current collector and a second active mass area coated on one or two surfaces of the second electrode current collector. An uncoated area without a second active mass area exists at the opposite end of the second electrode current collector in the width direction (parallel to the Z-axis). The uncoated area itself acts as a second electrode tab. The second uncoated area 12 is provided below the electrode assembly 10, which is accommodated in the battery housing 20 in the height direction (parallel to the Z-axis).

[0108] This means that the electrode assembly 10 can be an electrode assembly 10 comprising the first electrode, the second electrode, and the separator, which is arranged between the first and second electrodes and wound around the winding axis to define a core and an outer circumferential surface. In this case, the first electrode has the first active mass region, which is coated with an active mass layer along the winding direction, and the first uncoated region, which is not coated with the active mass layer, and at least part of the first uncoated region itself can be used as the electrode tab.On the other hand, the second electrode has the second active mass area, which is coated with an active mass layer along the winding direction, and the second uncoated area, which is not coated with the active mass layer, and at least part of the second uncoated area 12 itself can be used as the electrode tab.

[0109] Preferably, the electrode assembly 10 can be a wound electrode assembly 10 having a structure in which the first electrode current collector and the second current collector, which have a leaf shape, and the separator arranged between the first and the second electrode current collector, are wound in one direction. The first electrode current collector has the first uncoated area 11, which is not coated with the active material layer at the end of its long side, and at least a portion of the first uncoated area 11 itself can be used as the electrode tab. Additionally, the second electrode current collector has the second uncoated area 12, which is not coated with the active material layer at the end of its long side, and at least a portion of the second uncoated area 12 itself can be used as the electrode tab.

[0110] The electrode assembly 10 can be a wound electrode assembly in which the first uncoated area 11 and the second uncoated area 12, which have opposite polarities, extend in opposite directions. That is, the first uncoated area 11 and the second uncoated area 12 can extend and protrude in opposite directions along the lateral direction of the electrode assembly 10, i.e., the vertical direction of the battery 1 (the direction parallel to the Z-axis).

[0111] In the present disclosure, an active mass of the positive electrode coated on a positive electrode plate and an active mass of the negative electrode coated on a negative electrode plate can, without limitation, comprise any known active mass from the technical field to which the present disclosure relates.

[0112] In one example, the active mass of the positive electrode can be an alkali metal compound represented by the formula A[AxMy]O2+z (A comprises at least one of Li, Na or K; M comprises at least one selected from Ni, Co, Mn, Ca, Mg, Al, Ti, Si, Fe, Mo, V, Zr, Zn, Cu, Al, Mo, Sc, Zr, Ru and Cr; x ≥ 0, 1 ≤ x + y ≤ 2, 0,1 ≤ z ≤ 2; the stoichiometric coefficients x, y and z are chosen such that the compound remains electrically neutral).

[0113] In another example, the active mass of the positive electrode can be an alkali metal compound xLiM1O2-(1-x)Li2M2O3 (M1 comprises at least one element with an average trivalent oxidation state; M2 comprises at least one element with an average tetravalent oxidation state; 0 ≤ x ≤ 1), disclosed by US6,677,082 and US6,680,143.

[0114] In yet another example, the active mass of the positive electrode can be lithium metal phosphate, represented by the formula LiaM1xFe1-xM2yP1-yM3zO4-z (M1 comprises at least one selected from Ti, Si, Mn, Co, Fe, V, Cr, Mo, Ni, Nd, Al, Mg and Al; M2 comprises at least one selected from Ti, Si, Mn, Co, Fe, V, Cr, Mo, Ni, Nd, Al, Mg, Al, As, Sb, Si, Ge, V and S; M3 comprises a halogen group element, optionally including F; 0 < a ≤ 2, 0 ≤ x ≤ 1, 0 ≤ y ≤ 1, 0 ≤ z < 1; the stoichiometric coefficients a, x, y and z are chosen such that the compound remains electrically neutral) or Li3M2(PO4)3 [M comprises at least one selected from Ti, Si, Mn, Co, Fe, V, Cr, Mo, Ni, Nd, Al, Mg, Al, As, Sb, Si, Ge, V and S Ti, Si, Mn, Fe, Co, V, Cr, Mo, Ni, Al, Mg and Al are selected].

[0115] Preferably, the active mass of the positive electrode can comprise primary particles and / or secondary particles formed by agglomeration of the primary particles.

[0116] In one example, the active material of the negative electrode can be a carbon material, lithium metal or a lithium metal compound, silicon or a silicon compound, tin or a tin compound. Metal oxides with a potential of less than 2 V, such as TiO₂ and SnO₂, can be used as the active material of the negative electrode. The carbon material can be low-crystalline or high-crystalline carbon.

[0117] For example, the separator may have a porous polymer film made from a polyolefin-based polymer, such as an ethylene homopolymer, a propylene homopolymer, an ethylene / butene copolymer, an ethylene / hexene copolymer, and an ethylene / methacrylate copolymer, used individually or in stacks. Alternatively, the separator may have a conventional porous nonwoven fabric, such as one made from high-melting-point glass fibers and polyethylene terephthalate fibers.

[0118] The separator can have a coating layer of inorganic particles on at least one of its surfaces. Additionally, the separator itself can be a coating layer of inorganic particles. The particles forming the coating layer can be bonded together with a binder to create an interstitial volume between adjacent particles.

[0119] The inorganic particles can be inorganic materials with a dielectric constant of 5 or higher. Non-restrictive examples of the inorganic particles can include at least one material selected from the group consisting of Pb(Zr,Ti)O3 (PZT), Pb1-xLaxZr1-yTiyO3 (PLZT), PB(Mg3Nb2 / 3)O3-PbTiO3 (PMN-PT), BaTiO3, hafnium oxide (HfO2), SrTiO3, TiO2, A12O3, ZrO2, SnO2, CeO2, MgO, CaO, ZnO, and Y2O3.

[0120] An electrolyte can be a salt with a structure of A+B-. Here, A+ comprises an alkali metal cation such as Li+, Na+, K+, or a combination thereof. B- comprises at least one anion selected from the group consisting of F-, Cl-, Br-, I-, NO3-, N(CN)2-, BF4-, ClO4-, AlO4-, AlCl4-, PF6-, SbF6-, AsF6-, BF2C2O4-, BC4O8-, (CF3)2PF4-, (CF3)3PF3-, (CF3)4PF2-, (CF3)5PF-, (CF3)6P-, CF3SO3-, C4F9S03-, CF3CF2S03-, (CF3SO2)2N-, (FSO2)2N-, CF3CF2(CF3)2CO-, (CF3S02)2CH-, (SF5)3C-, (CF3S02)3C-, CF3(CF2)7SO3-, CF3CO2-, CH3CO2-, SCN- and (CF3CF2SO2)2N- consists.

[0121] The electrolyte can be used by dissolving it in an organic solvent. The organic solvent can include at least one of the following: propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), dimethyl sulfoxide, acetonitrile, dimethoxyethane, diethoxyethane, tetrahydrofuran, N-methyl-2-pyrrolidone (NMP), ethyl methyl carbonate (EMC), or γ-butyrolactone.

[0122] Meanwhile, at least part of the first uncoated area 11 along the winding direction of the electrode assembly 10 can be divided into a multitude of segments. The segments can, for example, have a trapezoidal shape, a square or rectangular shape, a parallelogram shape, a semicircular shape, and a semi-oval shape, and can be arranged repeatedly at a predetermined interval along the winding direction. The segments can have a greater lower width than an upper width, and the width can vary from bottom to top (i.e., in the z-direction). Fig. 2) gradually and / or stepwise increase. The multitude of segments can be bent along the radial direction of the electrode assembly 10. Here, the radial direction refers to a direction towards the core of the electrode assembly 10 or a direction towards the outer circumference of the electrode assembly 10. For example, as in Fig. As shown in Figure 5b, the multitude of segments can be bent towards the core. Additionally, the multitude of segments can overlap each other in several layers. Preferably, the multitude of segments can overlap each other in several layers along the radial direction of the electrode assembly 10. Furthermore, the multitude of segments can be notched by a laser. The segments can be formed by a known metal foil cutting process, for example, ultrasonic cutting or punching.

[0123] It is desirable to create a predetermined gap between the lower end of the cut line between the segments and the active material layer to prevent damage to the active material layer when bending the first uncoated area 11. This is because stress concentrates on or near the lower end of the cut line when the first uncoated area 11 is bent. Additionally, this is because it is difficult to create a pattern when cutting with a laser. The gap preferably measures 0.2 to 4 mm. When the gap is set to the appropriate numerical range, it is possible to prevent damage to the active material layer near the lower end of the cut line due to the stress occurring when bending the first uncoated area 11. Furthermore, the gap can prevent damage to the active material layer from the space between the segments when notching or cutting them.

[0124] The bending direction of the first uncoated area 11 can, for example, be towards the winding center C of the electrode assembly 10. If the first uncoated area 11 has the bent shape described above, the space occupied by the first uncoated area 11 is reduced, thereby improving the energy density. Additionally, the increased coupling area between the first uncoated area 11 and the first current collector 30 can lead to further improved coupling strength and an additional reduction in resistance.

[0125] Although the bending and overlap of the first uncoated area 11 has been described above, it is obvious that the same structure as in the first uncoated area 11 can be used on the second uncoated area 12.

[0126] With reference to Fig. 1 to Fig. 4. The battery housing 20 can accommodate the electrode assembly 10 and the first current collector 30. The battery housing 20 is an approximately cylindrical container with an opening section at the bottom and can be made, for example, of a material with conductive properties, such as a metal. The material of the battery housing 20 can be, for example, aluminum, steel, stainless steel, or nickel. The bottom of the battery housing 20 with the opening section is referred to as the open end. The side (the outer circumferential surface) and the top surface of the battery housing 20 can be formed in one piece. The top surface (a surface parallel to the XY plane) of the battery housing 20 has an approximately flat shape. The top surface located on one side opposite the opening section (or the open end) is referred to as the closed section.The battery housing 20 receives the electrolyte together with the electrode assembly 10 through the opening section formed on the underside.

[0127] The battery housing 20 is electrically connected to the electrode assembly 10. For example, the battery housing 20 is electrically connected to the second uncoated area 12 of the electrode assembly 10. In this case, the battery housing 20 has the same polarity as the second uncoated area 12.

[0128] With reference to the Fig. 2 and Fig. 4. The battery housing 20 can have a beaded section 21 and a crimped section 22 formed at its lower end. The beaded section 21 is located below the electrode assembly 10. The beaded section 21 is formed by pressing in the circumference of the outer circumferential surface of the battery housing 20. For example, the beaded section 21 can be formed at the end adjacent to the opening section formed on the underside and pressed inwards. The beaded section 21 can prevent the electrode assembly 10, which has a size approximately equal to the inner diameter of the battery housing 20, from slipping out of the opening section formed on the underside of the battery housing 20 and can act as a support in which the cap 90 sits.

[0129] The crimp section 22 is formed below the bead section 21. The crimp section 22 can be formed on the side facing the opening section and not the bead section 21, and can extend towards the opening section and be bent. The crimp section 22 extends and is bent around the outer circumferential surface of the cap 90, which is positioned below the bead section 21 and at least part of the underside of the cap 90.

[0130] Meanwhile, the present disclosure does not preclude the possibility that the battery housing 20 does not have the beaded section 21 and / or the crimped section 22. That is to say, in the present disclosure, if the battery housing 20 does not have the beaded section 21 and / or the crimped section 22, fixing the electrode assembly 10 and / or sealing the battery housing 20 can be achieved, for example, by applying an additional component that can serve as a stop for the electrode assembly 10. Additionally, if the battery 1 of the present disclosure has the cap 90, fixing the electrode assembly 10 and / or sealing the battery housing 20 can be achieved, for example, by applying an additional structure in which the cap 90 can sit and / or by welding between the battery housing 20 and the cap 90.For example, the applicant's patent publication KR 10-2019-0030016 A discloses a battery in which the bead section is omitted, and this structure can be used in the present disclosure.

[0131] With reference to Fig. 2 to Fig. 5a The first current collector 30 can be coupled to the electrode assembly 10. For example, the first current collector 30 can be coupled to the first uncoated area 11 on the electrode assembly 10. The first current collector 30 can be arranged between the first uncoated area 11 and the insulator 40. For example, the first current collector 30 can be coupled to the first uncoated area 11 on the electrode assembly 10 and arranged between the first uncoated area 11 and the insulator 40. The first current collector 30 can be formed from a metallic material with conductive properties. Although not shown in the drawing, the first current collector 30 can comprise a variety of concave-convex patterns formed radially on its lower surface.Once the concave-convex patterns are formed, the concave-convex patterns can be embossed by pressing the first current collector 30 into the first uncoated area 11.

[0132] According to another embodiment of the present disclosure, the battery 1 may not have the first current collector 30. In this case, the first uncoated area 11 may be directly electrically connected to the terminal 50.

[0133] With reference to Fig. 3 and Fig. 4. The first current collector 30 can be coupled to the end of the first uncoated area 11. The coupling between the first uncoated area 11 and the first current collector 30 can be achieved, for example, by laser welding. The laser welding can be carried out by partially melting the base material of the first current collector 30 and can be selectively performed using a welding solder located between the first current collector 30 and the first uncoated area 11. In this case, the solder preferably has a lower melting point than that of the first current collector 30 and the first uncoated area 11. In addition to laser welding, resistance welding, ultrasonic welding, spot welding, etc., can be used, but the welding method is not limited to these.

[0134] With reference to Fig. 5b The first current collector 30 can be coupled to a coupling surface formed by the end bend of the first uncoated area 11 in a direction parallel to the first current collector 30. The bending direction of the first uncoated area 11 can, for example, be a direction towards the winding center C of the electrode assembly 10. If the first uncoated area 11 has a curved shape as described above, the space occupied by the first uncoated area 11 is reduced, leading to an improvement in energy density. In addition, the increased coupling area between the first uncoated area 11 and the first current collector 30 can lead to an improvement in coupling strength and a reduced resistance effect at the coupling surface.

[0135] With reference to the Fig. 2 to Fig. 5a The insulator 40 can be arranged between the inner surface of the battery housing 20, which faces the first uncoated area 11 or the first current collector 30, and the first uncoated area 11 or the first current collector 30 to prevent an electrical connection between the first uncoated area 11 and the battery housing 20. For example, the insulator 40 can be provided between the top surface of the electrode assembly 10 and the inner surface of the battery housing 20, or between the first current collector 30, which is coupled to the electrode assembly 10, and the inner surface of the battery housing 20. The insulator 40 prevents contact between the first uncoated area 11 and the battery housing 20 and / or contact between the first current collector 30 and the battery housing 20.This means that the insulator 40 is incorporated into the battery housing 20, covers at least part of the electrode assembly 10, and is designed to prevent an electrical connection between the first uncoated area 11 and the battery housing 20. Therefore, the insulator 40 can be made of a material with insulating properties. For example, the insulator 40 can comprise an insulating polymer material.

[0136] With reference to the Fig. 2 to Fig. 5a the insulator 40 can have a first cover section 41 and a second cover section 42.

[0137] The second cover section 42 can extend vertically downwards from the outer circumference of the first cover section 41. That is, the second cover section 42 refers to a vertically extended portion (parallel to the Z-axis) from the outer edge of the first cover section 41. Therefore, the first cover section 41 and the second cover section 42 can have the shape of a cup. The first cover section 41 refers to the remaining part of the insulator 40, excluding the second cover section 42. For example, in the Fig. 2 to Fig. 5a The first covering section 41 extends onto a horizontally extended part of the insulator 40 (parallel to the XY plane). The first covering section 41 can cover the end of the first uncoated area 11 or the surface of the first current collector 30 facing the inner surface of the battery housing 20. For example, the first covering section 41 can cover the surface of the first current collector 30 facing the upper inner surface of the battery housing 20.

[0138] The insulator 40 can have a central opening with a predetermined diameter in the center of the first cover section 41. For example, the insulator 40 can have the central opening adjacent to the winding center C. Similarly, the first cover section 41 can have the approximately circular central opening adjacent to the winding center C. Due to the presence of the central opening, the terminal 50 can come into contact with the first current collector 30 or the first uncoated area 11.

[0139] In another aspect of the present disclosure, a plurality of openings with a smaller diameter than the central opening can also be formed around the central opening of the first cover section 41. For example, the plurality of openings around the central opening of the first cover section 41 can be formed to allow an electrolyte solution to move. Here, when the electrolyte solution is injected into the battery housing 20, the insulator 40 can be placed at the bottom. That is, when the battery 1 of Fig. 2 is turned around, i.e., the terminal 50 is located on the bottom side, the electrolyte solution can be injected into the battery housing 20.

[0140] The electrolyte solution can flow downwards through the central opening provided in the first cover section 41 of the insulator 40, move horizontally across the surface of the first cover section 41, or move upwards through the plurality of openings. Thus, the electrolyte solution can be supplied throughout the entire electrode assembly 10. That is, if the first cover section 41 of the insulator 40 has the plurality of openings, the electrolyte solution can be supplied smoothly and easily to the electrode assembly 10.

[0141] Meanwhile, the plurality of openings can be spaced apart at a predetermined distance from one another. For example, the plurality of openings can be arranged on any straight line extending from the center of the insulator 40 to the outer circumferential surface of the insulator 40.

[0142] The first cover section 41 can be connected to the second cover section 42. For example, the first cover section 41 and the second cover section 42 can be formed as a single piece. For example, the first cover section 41 and the second cover section 42 can form a single polymer structure. Alternatively, the first cover section 41 and the second cover section 42 can be formed separately and combined with each other. For example, the first cover section 41 and the second cover section 42 can be formed separately and combined to form a polymer structure.

[0143] In this case, the thickness of the first cover section 41 can differ from the thickness of the second cover section 42. In particular, as shown in Fig. As can be seen in 5a, the thickness of the second cover section 42 is less than the thickness of the first cover section 41.

[0144] In one embodiment of the present disclosure, at least a portion of the first uncoated area 11, which is arranged on the outer circumference of the electrode assembly 10, can be omitted. Accordingly, a predetermined space can be formed on top of the outer circumference of the electrode assembly 10 where the first uncoated area 11 is omitted. Thus, electrical contact between the first uncoated area 11 and the battery housing 20 can be prevented by means of this predetermined space. However, to ensure more reliable insulation, the second covering section 42 can be provided. In this case, the thickness of the second covering section 42 is less than the thickness of the first covering section 41, but it is still possible to ensure sufficient insulation.Since the thickness of the second cover section 42 is smaller than the thickness of the first cover section 41, it is also possible to minimize the space occupied by the insulator 40.

[0145] With reference to Fig. 5a The first cover section 41 can have a round section R with a predetermined radius of curvature on its outer circumference. The round section R can be formed at the intersection between the upper surface of the first cover section 41 and the side of the second cover section 42. In this case, the radius of curvature of the round section R can be less than or equal to the radius of curvature formed at the intersection between the upper inner surface of the battery housing 20 and the side of the battery housing 20. With this structure, the round section R can come into close, gap-free contact with the inner surface of the battery housing 20. This structure makes it possible to minimize the movement of the electrode assembly 10 within the battery housing 20, thereby preventing damage to the electrical coupling element when vibrations and external shocks act on the battery 1.However, if, for example, the radius of curvature of the circular section R is larger than the radius of curvature formed at the intersection between the upper inner surface of the battery housing 20 and the side of the battery housing 20, a gap may form between the circular section R and the inner surface of the battery housing 20. In this case, if vibrations and external shocks act on the battery 1, movements of the electrode assembly 10 could occur, causing damage to the electrical coupling element.

[0146] Meanwhile, the battery 1 of the present disclosure may not have the first current collector 30. In this case, the insulator 40 may comprise the first cover section 41 to cover the end of the first uncoated region 11, and the second cover section 42 to cover the top of the outer circumferential surface of the electrode assembly 10. Although not shown in the drawing, the first cover section 41 may be located in the space between the end of the first uncoated region 11 and the upper inner surface of the battery housing 20.

[0147] In this case, the first covering section 41 of the insulator 40 can have a thickness corresponding to the distance between the end of the first uncoated area 11 and the upper inner surface of the battery housing 20. Therefore, the first covering section 41 can completely fill the space between the end of the first uncoated area 11 and the upper inner surface of the battery housing 20. This minimizes the movement of the electrode assembly 10 within the battery housing 20, thus preventing damage to the electrical coupling element when vibrations and external shocks act upon the battery 1.

[0148] Meanwhile, the insulator 40 can have a thickness greater than or equal to approximately 0.1 mm. If the insulator 40 is too thin, the insulation may deteriorate. Another reason for this is that forming the insulator 40 with a thickness less than or equal to a certain value can be technically difficult. The upper limit for the thickness of the insulator 40 can be a thickness corresponding to the distance between the inner surface of the battery housing 20 and the first uncoated area 11, or the distance between the inner surface of the battery housing 20 and the first current collector 30. If the insulator 40 is too thick, it occupies a large area of ​​the interior of the battery housing 20, resulting in low capacity and high cost of the battery cell.Accordingly, the thickness of the insulator 40 can be adjusted within a suitable range to maintain proper insulation and prevent capacity reduction of the battery cell. However, the thickness of the insulator 40 is not limited to the range described above, and any thickness range necessary to ensure insulation and prevent damage to the electrical coupling element by minimizing movement of the electrode assembly 10 within the battery housing 20 is included within the scope of this disclosure.

[0149] Meanwhile, if the battery 1 of the present disclosure comprises the first current collector 30, the insulator 40 can comprise the first cover section 41 to cover at least part of the first current collector 30, and the second cover section 42 to cover the top of the outer circumferential surface of the electrode assembly 10. That is, the first cover section 41 can cover at least part of the first current collector 30. For example, with reference to Fig. 3. The first covering section 41 covers all areas except for some areas located in the center of the upper surface of the first pantograph 30. Additionally, the first covering section 41 can cover some areas of the first uncoated area 11 that are not covered by the first pantograph 30.

[0150] In this case, for example, as in Fig. As shown in Figure 5a, the first cover section 41 of the insulator has a thickness corresponding to the distance between the first current collector 30 and the upper inner surface of the battery housing 20. Therefore, the first cover section 41 can completely fill the space between the first current collector 30 and the upper inner surface of the battery housing 20. This minimizes the movement of the electrode assembly 10 within the battery housing 20, thus preventing damage to the electrical coupling element when vibrations and external shocks act upon the battery 1.

[0151] With reference to Fig. 5b or Fig. 5e In another embodiment, at least a portion of the first uncoated region 11 can be divided into a plurality of segments. Here, the plurality of segments can be bent towards the core. Additionally, the plurality of segments can overlap each other along the radial direction in several layers. In this case, the plurality of segments of the first uncoated region 11 can bend and overlap to form a curved surface. The curved surface can be approximately parallel to the upper surface of the battery housing. In this case, the first cover section 41 can cover the curved surface formed by the bending of the plurality of segments of the first uncoated region 11. The second cover section 42 can cover the upper part of the outer circumferential surface of the electrode assembly 10. With reference to Fig. 5e The area of ​​the first current collector 30, which is coupled to the curved surface of the plurality of segments on the electrode assembly 10 and is arranged between the curved surface and the battery housing 20, can be much smaller than the area of ​​the upper surface or top of the electrode assembly 10. For example, the diameter of the first current collector 30 can be less than or equal to the diameter of the central opening of the insulator 40. Additionally, the diameter of the first current collector 30 can be larger than the diameter of the central winding opening of the electrode assembly 10. Since the diameter of the first current collector 30 is larger than the diameter of the central winding opening of the electrode assembly 10, the first current collector 30 can be supported on the electrode assembly 10. Meanwhile, the center of the first current collector 30 and the winding center of the electrode assembly 10 can be arranged on the same line.Accordingly, the first current collector 30 and the terminal 50 can be held in contact with each other in order to subsequently weld them together. Meanwhile, the multitude of segments of the first uncoated area 11 can be bent in an overlapping manner along the radial direction of the electrode assembly 10. Thus, the electrode assembly 10 can exhibit current collection at the bent surface due to the overlap of the multitude of segments. Furthermore, since at least part of the bent surface is electrically coupled to the first current collector 30, the electrode assembly 10 can be electrically connected to the terminal 50 via the first current collector 30. Meanwhile, as in . Fig. 5d, in the embodiment of Fig. 5e the present disclosure assumes an embodiment in which only the first uncoated area 11 is not bent.

[0152] With reference to Fig. 5b or Fig. 5e The first cover section 41 can have a thickness corresponding to the distance between the curved surface of the plurality of segments and the upper inner surface of the battery housing 20. Therefore, the first cover section 41 can fill the space between the curved surface and the upper inner surface of the battery housing 20 without gaps. For example, with reference to Fig. 5e, the first cover section 41 is arranged between the curved surface formed by the bending of the plurality of segments of the first uncoated area 11, which faces the upper inner surface of the battery housing 20, and the upper inner surface or inside of the battery housing 20. Meanwhile, with reference to Fig. 5b, the first cover section is arranged between the first current collector 30 and the upper inner surface of the battery housing 20. In this case, the first cover section 41 can have a thickness corresponding to the distance between the first current collector 30 and the upper inner surface of the battery housing 20.

[0153] Accordingly, it is possible to minimize the movement of the electrode assembly 10 in the battery housing 20, thereby preventing damage to the electrical coupling part when vibrations and external shocks act on the battery 1.

[0154] Alternatively, with reference to Fig. 5b, in another embodiment of the present disclosure, the surface area of ​​the first current collector 30, which is coupled to the curved surface of the plurality of segments on the electrode assembly 10 and is arranged between the curved surface and the battery housing 20, is approximately similar to the surface area of ​​the upper surface of the electrode assembly 10. In this case, the first cover section 41 can cover the first current collector 30. The first cover section 41 can have a thickness corresponding to the distance between the first current collector 30 and the upper inner surface of the battery housing 20. Accordingly, the first cover section 41 can completely fill the space between the first current collector 30 and the upper inner surface of the battery housing 20.Accordingly, it is possible to minimize the movement of the electrode assembly 10 in the battery housing 20, thereby preventing damage to the electrical coupling part when vibrations and external shocks act on the battery 1.

[0155] The second cover section 42 can cover the upper part of the outer circumferential surface of the electrode assembly 10. For example, with reference to Fig. 3 and Fig. 4, the second covering section 42 covers the side of the first uncoated area 11. In particular, the second covering section 42 can cover the entire exposed outermost side of the first uncoated area 11 to prevent the first uncoated area 11 from being exposed to the inner circumferential surface of the battery housing 20. Thus, it is possible to effectively prevent electrical contact between the battery housing 20 with the opposite polarity to the first uncoated area 11 and the first uncoated area 11. Thus, according to the present disclosure, it is possible to effectively prevent an internal short circuit of the cylindrical secondary battery 1.

[0156] In particular, with reference to Fig. 4, the extended length of the second cover section 42 is greater than or equal to the extended length of the first uncoated area 11. This structure makes it possible to prevent electrical contact between the battery housing 20 with the second polarity and the first uncoated area 11 with the first polarity. Therefore, the extended length of the second cover section 42 should be at least equal to the extended length of the first uncoated area 11, and to ensure reliable insulation, the extended length of the second cover section 42 is preferably even slightly longer than the extended length of the first uncoated area 11.In another embodiment, if the plurality of segments of the first uncoated area 11 bends and overlaps to form a curved surface, the extended length of the second cover section 42 can be greater than or equal to the length from the lower endpoint of the intersection line between the plurality of segments to the bend point of the plurality of segments. Preferably, the lower end of the second cover section 42 can be located at a lower position than the lower end of the first uncoated area 11. With this structure, the second cover section 42 can effectively prevent electrical contact between the side of the first uncoated area 11 and the battery housing 20.

[0157] With reference to Fig. 2 and Fig. 4. The terminal 50 can be electrically connected to the first electrode tab 11 of the electrode assembly 10. That is, the terminal 50 can be made of a metallic material with conductive properties. The terminal 50 can be electrically connected to the first uncoated area 11, and at least part of the terminal 50 can be exposed through a through-opening formed on the top of the battery housing 20. For example, the terminal 50 can extend approximately through the center of the closed section formed on the top of the battery housing 20. That is, the battery housing 20 can have the through-opening at the closed section provided on the top of the battery housing 20. The terminal 50 can be inserted into the battery housing 20 through the through-opening.In particular, a body section 50a, an inner flange section 50c, and a flat section 50d of the connector 50 can be inserted through the through-opening into the battery housing 20. Thus, part of the connector 50 can be exposed at the top of the battery housing 20, and the remaining part can be located inside the battery housing 20. Preferably, the connector 50 can be riveted through the through-opening. For example, the connector 50 can be riveted and fastened to the upper inner surface of the battery housing 20. In particular, the inner flange section 50c of the connector 50 can be fastened to the inner surface of the closed section of the battery housing 20, for example, by riveting. The connector 50 can be coupled to the first current collector 30 or the first uncoated area 11 by the insulator 40.For example, the terminal 50 can be coupled to the first current collector 30 or the first uncoated area 11 through the central opening provided in the insulator 40. In this case, the diameter of the central opening of the insulator 40 can be greater than or equal to the diameter of the inner flange section 50c, as described below. The flat section 50d of the terminal 50 can be electrically coupled to the first current collector 30 through the central opening of the insulator 40. In this case, the terminal 50 can have the first polarity. More preferably, the flat section 50d of the terminal 50 can be coupled to the first current collector 30 by welding. That is, the welding can be carried out between the flat section 50d, which is provided within the inner flange section 50c, and the first current collector 30.The flat section 50d can be provided at the lower end of the terminal 50. The flat section 50d and the upper inner surface of the battery housing 20 can be parallel to each other. Therefore, the flat section 50d and the first current collector 30 can be parallel to each other. The welding process can include laser welding. In addition to laser welding, resistance welding and ultrasonic welding can be used, but the welding process is not limited to these. With this structure, the terminal 50 can act as a first electrode terminal in the battery 1 of this disclosure. If the terminal 50 has the first polarity, the terminal 50 is electrically isolated from the battery housing 20 with the second polarity. The electrical isolation between the terminal 50 and the battery housing 20 can be achieved by various methods.For example, insulation can be achieved by arranging the insulating seal 60, as described below, between the terminal 50 and the battery housing 20. Alternatively, insulation can be achieved by forming an insulating coating layer in part of the terminal 50. Alternatively, the terminal 50 can be structurally fixed to prevent contact between the terminal 50 and the battery housing 20. Alternatively, two or more of the methods described above can be used together.

[0158] With reference to Fig. 4 The connection 50 comprises the body section 50a inserted into the through-opening; an outer flange section 50b extending along the outer surface from one side circumference of the body section 50a exposed through the upper outer surface of the battery housing 20; the inner flange section 50c extending from the opposite side circumference of the body section 50a exposed through the upper inner surface of the battery housing 20 to the inner surface; and the flat section 50d provided within the inner flange section 50c.

[0159] The outer flange section 50b is exposed on the outside of the battery housing 20. The outer flange section 50b can be located approximately in the center of the upper surface of the battery housing 20. The maximum width of the outer flange section 50b can be greater than the maximum width of the opening formed in the battery housing 20 by the penetration of the connector 50.

[0160] Body section 50a can be inserted into the battery housing 20. Body section 50a can be electrically connected to the first uncoated area 11 approximately through the center of the upper surface of the battery housing 20. In particular, body section 50a can be coupled simultaneously through the battery housing 20 and the insulator 40 to the first current collector 30 or the first uncoated area 11. Body section 50a can be riveted to the inner surface of the battery housing 20 by means of the inner flange section 50c. That is, the inner flange section 50c, bent towards the inner surface of the battery housing 20, can be provided by applying a clamping device at the lower circumferential end of body section 50a. Accordingly, the maximum width of body section 50a can be greater than the maximum width of the opening in the battery housing 20 formed by the penetration of body section 50a.Meanwhile, in another embodiment, the body section 50a may not be bent towards the inner surface of the battery housing 20. That is, the body section 50a may not encompass the inner flange section 50c. For example, with reference to... Fig. 6. The body section 50a has an approximately circular shape extending through the opening located approximately in the center of the upper surface of the battery housing 20. In one embodiment of the present disclosure, the body section 50a may have a circular shape on the plane, but is not limited to this. The body section 50a may selectively have a polygonal shape, a star shape, a shape with a leg extending from the center, etc.

[0161] With reference to the Fig. 2 to Fig. 5a The insulating seal 60 is arranged between the battery housing 20 and the terminal 50 to prevent the battery housing 20 and the terminal 50 from touching each other with opposite polarities. That is, the insulating seal 60 prevents an electrical connection between the battery housing 20 and the terminal 50. Therefore, the upper surface of the battery housing 20, with its approximately flat shape, can act as a second electrode terminal of the battery 1.

[0162] With reference to the Fig. 2 to Fig. 5a The insulating gasket 60 comprises a gasket exposure section 61 and a gasket insertion section 62. The gasket exposure section 61 is arranged between the outer flange section 50b of the connector 50 and the battery housing 20. The gasket insertion section 62 is arranged between the body section 50a of the connector 50 and the battery housing 20. Preferably, the gasket insertion section 62 is arranged between the inner flange section 50c and the battery housing 20. The gasket insertion section 62 can come into close contact with the inner surface of the battery housing 20 if the shape of the gasket insertion section 62 is changed together with the body section 50a during the riveting of the body section 50a. The gasket exposure section 61 and the gasket insertion section 62 of the insulating gasket 60 can have different thicknesses at each location.

[0163] Meanwhile, the insulating seal 60 can be made of a resin material with insulating properties. If the insulating seal 60 is made of a resin material, it can be thermally fused to the battery housing 20 and the terminal 50. In this case, it is possible to improve the sealing at the coupling interface between the insulating seal 60 and the terminal 50, and at the coupling interface between the insulating seal 60 and the battery housing 20.

[0164] The entire remaining area, with the exception of the area occupied by the terminal 50 and the insulating seal 60 on the upper surface of the battery housing 20, corresponds to the second electrode terminal with the opposite polarity to the terminal 50. Alternatively, as described in the present disclosure, if the insulating seal 60 is omitted and the insulating coating layer is partially provided in the terminal 50, the entire remaining area, with the exception of the area occupied by the terminal 50 and the insulating coating layer on the upper surface of the battery housing 20, can serve as the second electrode terminal.

[0165] The cylindrical side wall of the battery housing 20 can be formed integrally with the second electrode terminal to prevent a discontinuity with the second electrode terminal. The connection from the side wall of the battery housing 20 to the second electrode terminal can be a smooth curve. However, the present disclosure is not limited to this, and the connected part can include at least one corner with a predetermined angle.

[0166] The battery 1 according to the embodiment of Fig. 6 and Fig. 7 is the battery 1 of the previous embodiment of Fig. 5a Similar and overlapping descriptions of elements that are substantially identical or similar to the previous embodiment are omitted and differences between this embodiment and the previous embodiment are described below.

[0167] With reference to Fig. 6 The body section 50a has an approximately circular shape that passes through the opening located approximately in the center of the upper surface of the battery housing 20. Therefore, the sealing insertion section 62, which is arranged around the body section 50a, can come into close contact with the outer circumferential surface of the body section 50a. Simultaneously, the sealing insertion section 62 can come into close contact with the first current collector 30. With this structure, it is easy to insert the connector 50 into the opening of the battery housing 20.

[0168] With reference to the Fig. 5c and Fig. 7. The insulating seal 60 and the insulator 40 can be made of the same material. Furthermore, the insulating seal 60 can be connected to the insulator 40 and formed integrally with it. The insulating seal 60 can, for example, be made of a material capable of restoring its original shape. Accordingly, the insulating seal 60 can be formed into a shape that is easy to couple while being inserted into the opening of the battery housing 20, and when the coupling is complete, the insulating seal 60 can be returned to its original state. Fig. 5c and Fig. 7 return. However, this is an example of coupling the insulating seal 60 with the opening of the battery housing 20, and the coupling method is not limited to this; it is obvious that other coupling methods can be used. With this structure, it is possible to further improve the fixation and vibration resistance of the insulating seal 60 and the insulator 40 formed integrally with it.

[0169] With reference to Fig. According to one embodiment of the present disclosure, the battery may further comprise a side spacer 70. The side spacer 70 may cover at least a portion of the outer circumferential surface of the electrode assembly 10. The side spacer 70 may contact at least a portion of the battery housing 20. For example, the side spacer 70 may contact the inner circumferential surface of the battery housing 20. Preferably, the side spacer 70 may cover at least a portion of the outer circumferential surface of the electrode assembly 10 along its outer circumference. That is, the side spacer 70 may be arranged between the outer circumferential surface of the electrode assembly 10 and the inner circumferential surface of the battery housing 20. In this case, the side spacer 70 may have a thickness corresponding to the distance between the outer circumferential surface of the electrode assembly 10 and the inner circumferential surface of the battery housing 20.For example, with reference to . Fig. 8, the thickness of the side spacer 70 is approximately equal to the distance between the outer circumferential surface of the electrode assembly 10 and the inner circumferential surface of the battery housing 20. Meanwhile, the thickness of the side spacer 70 can be approximately equal to the thickness of the second cover section 42 of the insulator 40.

[0170] With this structural feature of the side spacer 70, it is possible to fill the space between the outer circumferential surface of the electrode assembly 10 and the inner circumferential surface of the battery housing 20. Therefore, it is possible to minimize the movement of the electrode assembly 10 within the battery housing 20, thus preventing damage to the electrical coupling element when vibrations and external shocks act upon the battery 1.

[0171] Although not shown in the drawing, the side spacer 70 can be formed with its end in contact with the second cover section 42 of the insulator 40. Furthermore, the side spacer 70 can be formed integrally with the second cover section 42. That is, the side spacer 70 can be connected to and formed integrally with the insulator 40. With this structure, it is possible to further reduce the empty space between the outer circumferential surface of the electrode assembly 10 and the inner circumferential surface of the battery housing 20, thereby further improving vibration resistance. Meanwhile, the side spacer 70 can comprise an insulating polymer material.

[0172] With reference to Fig. 2, Fig. 4 and Fig. 9 The second current collector 80 is coupled to the underside of the electrode assembly 10. The second current collector 80 is made of a metallic material with conductive properties and is connected to the second uncoated area 12.

[0173] With reference to Fig. 4. The second current collector 80 can have at least one lug coupling section 81 coupled to the second uncoated area 12, and at least one housing coupling section 82 electrically coupled to the beaded section 21 of the inner surface of the battery housing 20. The housing coupling section 82 can be compressed and fixed by the crimp section 22. Preferably, the housing coupling section 82 can be coupled to the beaded section 21 by welding. The second current collector 80 is electrically connected to the battery housing 20. As shown in the Fig. 4 and Fig. As shown in Figure 8, the second current collector 80 can be arranged and fixed between the inner surface (the lower surface) of the corrugated section 21 of the battery housing 20 and the seal 100. Alternatively, the second current collector 80 can be welded to the inner surface (the lower surface) of the corrugated section 21.

[0174] The second current collector 80 can have a leg structure in which the lug coupling section 81 and the housing coupling section 82 extend along the radial direction. Preferably, a plurality of leg structures can be provided. The lug coupling section 81 can be positioned below the electrode assembly 10 and arranged at a higher position than the bead section 21.

[0175] The second current collector 80 has a circular current collector opening at a location corresponding to the central winding opening in the middle of the electrode assembly 10. The central winding opening and the current collector opening, which are interconnected, can serve as a passage for inserting a welding rod for welding between the terminal 50 and the first current collector 30 or for shining a laser welding beam into it.

[0176] Although not shown in the drawing, the second current collector 80 can have a variety of concave-convex patterns formed radially on one of its surfaces. Once the concave-convex patterns are formed, they can be embossed by pressing the second current collector 80 into the second uncoated area 12.

[0177] With reference to Fig. 9 The second current collector 80 is coupled to the end of the second uncoated area 12. For example, the coupling between the second uncoated area 12 and the second current collector 80 can be achieved by laser welding. The laser welding can be carried out by partially melting the base material of the second current collector 80 and can be selectively performed using a welding solder located between the second current collector 80 and the second uncoated area 12. In this case, the solder preferably has a lower melting point than the second current collector 80 and the second uncoated area 12. In addition to laser welding, resistance welding, ultrasonic welding, etc., can be used, but the welding method is not limited to these.

[0178] Although not shown in the drawing, the second current collector 80 can be coupled to a coupling surface formed by bending the end of the second uncoated area 12 in a direction parallel to the second current collector 80. For example, the bending direction of the second uncoated area 12 can be towards the winding center C of the electrode assembly 10. In the same way as the first uncoated area 11, the second uncoated area 12 can comprise a plurality of segments to form a curved structure. When the second uncoated area 12 has a curved shape as described above, the space occupied by the second uncoated area 12 is reduced, resulting in an improved energy density.Additionally, the increased coupling area between the second uncoated area 12 and the second current collector 80 can lead to an improvement in coupling strength and an effect of reduced resistance at the coupling area.

[0179] With reference to the Fig. 2 and Fig. 9. The cap 90 can, for example, be made of a metallic material to ensure strength. The cap 90 covers the opening section (the open end) formed on the underside of the battery housing 20. That is, the cap 90 forms the underside of the battery 1. In the battery 1 of the present disclosure, the cap 90 is nonpolar even if it is made of a metallic material with conductive properties. Nonpolar can mean that the cap 90 is electrically insulated from the battery housing 20 and the terminal 50. Thus, the cap 90 does not serve as a positive or negative electrode terminal. Therefore, the cap 90 does not need to be electrically connected to the electrode assembly 10 and the battery housing 20, and its material is not necessarily a conductive metal.

[0180] If the battery housing 20 of this disclosure has the beaded section 21, the cap 90 can sit on the beaded section 21 formed in the battery housing 20. Additionally, if the battery housing 20 of this disclosure has the crimped section 22, the cap 90 is secured by the crimped section 22. The seal 100 can be arranged between the cap 90 and the crimped section 22 of the battery housing 20 to ensure a seal of the battery housing 20. However, as previously described, the battery housing 20 of this disclosure may not have the beaded section 21 and / or the crimped section 22, and in this case, the seal 100 can be arranged between a fixing structure provided on the opening side of the battery housing 20 and the cap 90 to ensure a seal of the battery housing 20.

[0181] With reference to the Fig. 2 and Fig. The cap 90 may further include a vent section 91 to prevent the internal pressure from exceeding a preset value due to gas generated in the battery housing 20. The vent section 91 corresponds to a region with a smaller thickness than the other regions in the cap 90. The vent section 91 is structurally weaker than any other region. Therefore, if the internal pressure of the battery housing 20 exceeds the predetermined level due to defects in the battery 1, the vent section 91 will rupture to expel the gas generated in the battery housing 20. For example, the vent section 91 can be formed by partially reducing the thickness of the battery housing 20 by means of notches on the top and / or bottom surfaces of the cap 90.

[0182] With reference to Fig. 9. The seal 100 can have an approximately ring-shaped form arranged around the cap 90. The seal 100 can simultaneously cover the underside, the top, and the side of the cap 90. The radial length of a portion of the seal 100 covering the top of the cap 90 can be less than or equal to the radial length of a portion of the seal 100 covering the underside of the cap 90. If the radial length of the portion of the seal 100 covering the top of the cap 90 were too long, the seal 100 could press against the second current collector 80, potentially damaging the second current collector 80 or the battery housing 20 if the battery housing 20 were vertically compressed. Therefore, it is necessary to maintain a small radial length for the portion of the seal 100 covering the top of the cap 90 at a predetermined level.

[0183] With reference to Fig. 9. According to one embodiment of the present disclosure, the battery 1 may further comprise the lower spacer 110. The lower spacer 110 may be arranged between the cap 90 and the second current collector 80. The lower spacer 110 may be designed to prevent movement of the electrode assembly 10. For example, as in Fig. As shown in Figure 9, the lower spacer has a height corresponding to the distance between the second current collector 80 and the cap 90. Thus, the lower spacer 110 fills the space between the cap 90 and the second current collector 80. This minimizes the movement of the electrode assembly 10 within the battery housing 20, thereby preventing damage to the electrical coupling element when vibrations and external shocks act upon the battery 1. The lower spacer 110 can also comprise an insulating polymer material.

[0184] Meanwhile, the insulator 40, the insulating seal 60, the side spacer 70, and the lower spacer 110 of the present disclosure can, for example, comprise a material with elastic properties. Accordingly, when vibrations and external shocks act on the battery 1, the insulator 40, the insulating seal 60, the side spacer 70, and the lower spacer 110 can absorb the shocks while being compressed and then return to their original state due to their elastic properties. Therefore, it is possible to minimize damage to the internal components of the battery 1 when vibrations and external shocks act on the battery 1.

[0185] Preferably, according to the present disclosure, the battery can, for example, have a form factor ratio (a value obtained by dividing the diameter of the battery by its height, i.e., defined as a ratio of diameter Φ to height H) that is greater than approximately 0.4. Here, the form factor refers to a value that specifies the diameter and height of the battery.

[0186] Preferably, the cylindrical battery can have a diameter of 40 mm to 50 mm and a height of 60 mm to 130 mm. The battery according to one embodiment of the present disclosure can, for example, be cell 46110, cell 4875, cell 48110, cell 4880, or cell 4680. In the value indicating the form factor, the first two numbers indicate the diameter of the cell, and the remaining numbers indicate the height of the cell.

[0187] Recently, the form factor of batteries used in electric vehicles has increased compared to the existing 1865 and 2170 batteries. This increased form factor results in higher energy density, improved thermal runaway protection, and better cooling efficiency.

[0188] The energy density of batteries can be further increased by minimizing unnecessary space within the battery casing as the form factor increases. The battery according to the present disclosure has an optimal structure for increasing the battery capacity while ensuring electrical insulation between the electrode assembly and the battery casing.

[0189] The battery according to one embodiment of the present disclosure can be a battery with an approximately cylindrical shape with a diameter of approximately 46 mm, a height of approximately 110 mm and a form factor ratio of approximately 0.418.

[0190] According to another embodiment, the battery can be a battery with an approximately cylindrical shape with a diameter of approximately 48 mm, a height of approximately 75 mm and a form factor ratio of approximately 0.640.

[0191] According to another embodiment, the battery can be a battery with an approximately cylindrical shape with a diameter of approximately 48 mm, a height of approximately 110 mm and a form factor ratio of approximately 0.436.

[0192] According to another embodiment, the battery can be a battery with an approximately cylindrical shape with a diameter of approximately 48 mm, a height of approximately 80 mm and a form factor ratio of approximately 0.600.

[0193] According to another embodiment, the battery can be a battery with an approximately cylindrical shape with a diameter of approximately 46 mm, a height of approximately 80 mm and a form factor ratio of approximately 0.575.

[0194] Traditionally, batteries with a form factor of approximately 0.4 or less were used. For example, 1865 batteries and 2170 batteries were used. In the case of 1865 batteries, the diameter is approximately 18 mm, the height approximately 65 mm, and the form factor is approximately 0.277. In the case of 2170 batteries, the diameter is approximately 21 mm, the height approximately 70 mm, and the form factor is approximately 0.300.

[0195] The battery according to the embodiment described above can be used to manufacture a battery pack.

[0196] Fig. Figure 10 is a representation that schematically shows the configuration of the battery pack according to an embodiment of the present disclosure.

[0197] With reference to Fig. 10. According to one embodiment of the present disclosure, the battery pack 3 comprises an assembly with a plurality of batteries 1 that are electrically connected to one another and a pack housing 2 in which the assembly is received. The battery 1 is a battery according to the embodiment described above. For the sake of simplicity, the illustration in the drawings omits the depiction of some components such as a busbar for electrically connecting the batteries 1, a cooling unit, and an external connection.

[0198] Battery pack 3 can be installed in a vehicle. The vehicle can be, for example, an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle. The vehicle can be a four-wheeled vehicle or a two-wheeled vehicle.

[0199] Fig. Figure 11 is a diagram describing the vehicle with battery pack 3. Fig. 10.

[0200] With reference to Fig. 11. According to one embodiment of the present disclosure, the vehicle 5 comprises the battery pack 3 according to one embodiment of the present disclosure. The vehicle 5 operates by means of the power provided by the battery pack 3 according to one embodiment of the present disclosure.

[0201] While the present disclosure has been described above in relation to a limited number of embodiments and drawings, the present disclosure is not limited thereto and it is obvious to those skilled in the art that various modifications and changes to it can be made within the technical aspects of the present disclosure and the equivalent scope of the attached claims. [Description of reference symbols] 5 vehicles 3 battery packs 2 Pack cases 1 battery 10 Electrode assembly C Winding Center 11 first uncoated area 12 second uncoated area 20 battery cases 21 Corrugated section 22 Crimp section 30 first current collector 40 Insulator 41 first cover section 42 second cover section 50 connection 50a Body section 50b outer flange section 50c inner flange section 50d flat section 60 Insulating seal 61 Seal exposure section 62 Seal insertion section 70 side spacers 80 second pantograph 81 Tab coupling section 82 Housing coupling section 90 cap 100 seals 110 lower spacer R round section QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] KR 10-2021-0007278

[0002] KR 10-2021-0022897

[0002] KR 10-2021-0022894

[0002] KR 10-2021-0022891

[0002] KR 10-2021-0022881

[0002] KR 10-2021-0024424

[0002] KR 10-2021-0030300

[0002] KR 10-2021-0030291

[0002] KR 10-2021-0046798

[0002] KR 10-2021-0058183

[0002] KR 10-2021-0077046

[0002] KR 10-2021-0084326

[0002] KR 10-2021-0131225

[0002] KR 10-2021-0131215

[0002] KR 10-2021-0131205

[0002] KR 10-2021-0131208

[0002] KR 10-2021-0131207

[0002] KR 10-2021-0137001

[0002] KR 10-2021-0137856

[0002] KR 10-2021-0142196

[0002] KR 10-2021-0153472

[0002] KR 10-2021-0160823

[0002] KR 10-2021-0163809

[0002] KR 10-2021-0165866

[0002] KR 10-2021-0172446

[0002] KR 10-2021-0177091

[0002] KR 10-2021-0194593

[0002] KR 10-2021-0194610

[0002] KR 10-2021-0194572

[0002] KR 10-2021-0194612

[0002] KR 10-2021-0194611

[0002] KR 10-2021-0001802

[0002] US 6,677,082

[0113] US 6,680,143

[0113] KR 10-2019-0030016 A

[0130]

Claims

[1] battery, comprising an electrode assembly comprising a first electrode, a second electrode and a separator arranged between the first electrode and the second electrode, wound around a winding axis defining a core and an outer circumferential surface, wherein the first electrode has a first active mass region coated with an active mass layer along a winding direction and a first uncoated region not coated with the active mass layer, and at least part of the first uncoated region itself is used as an electrode tab, wherein the second electrode has a second active mass area coated with an active mass layer along the winding direction and a second uncoated area not coated with the active mass layer, wherein at least part of the second uncoated area itself is used as an electrode tab; a battery housing with an open section on one side and a closed section on the other side, wherein the battery housing accommodates the electrode assembly through the open section, a first current collector in which battery housing is accommodated and which is coupled to at least part of the first uncoated area on the side of the closed section; a connection that is exposed to the outside of the battery housing and is electrically connected to the first uncoated area, an insulating seal that is positioned between the battery housing and the terminal to prevent electrical contact between the battery housing and the terminal, an insulator arranged between the enclosed section and the first current collector to prevent an electrical connection between the battery casing and the first uncoated area, wherein the insulator has a central opening through which the connection for coupling to the first uncoated area extends, wherein the central opening has a width that is greater than a maximum width of a combination of connection and insulating seal within the battery housing, and wherein a second current collector is incorporated in the battery housing, which is coupled to at least a part of the second uncoated area on the side of the opening section and is electrically connected to the battery housing. [2] Battery according to claim 1, wherein the insulator comprises: a first covering section that covers one end of the first uncoated area and / or a surface of the first current collector facing the inner surface of the battery housing; and a second cover section that covers an upper part of an outer circumferential surface of the electrode assembly. [3] Battery according to claim 2, wherein the second cover section extends vertically downwards from an outer circumference of the first cover section. [4] Battery according to claim 2, wherein the first current collector is coupled to the first uncoated area on the electrode assembly and is arranged between the first uncoated area and the insulator. [5] Battery according to claim 4, wherein the first cover section covers a surface of the first current collector which faces an upper inner surface of the battery housing. [6] Battery according to claim 4, wherein the first cover section has a thickness corresponding to a distance between the first current collector and an upper inner surface of the battery housing. [7] Battery according to claim 1, wherein at least a part of the first uncoated area is divided into a plurality of segments along the winding direction of the electrode assembly. [8] Battery according to claim 7, wherein the plurality of segments is bent along a radial direction of the electrode assembly. [9] Battery according to claim 7, wherein the plurality of segments overlap each other along a radial direction of the electrode assembly in several layers. [10] Battery according to claim 8, wherein the insulator comprises: a first covering section arranged between a curved surface formed by the bending of the plurality of segments of the first uncoated area and the inner surface of the battery housing and / or between the first current collector and the inner surface of the battery housing; and a second cover section that covers an upper part of an outer circumferential surface of the electrode assembly. [11] Battery according to claim 10, wherein the first current collector is coupled to the curved surface on the electrode assembly and is arranged between the curved surface and the insulator. [12] Battery according to claim 11, wherein the first cover section covers a surface of the first current collector which faces an upper inner surface of the battery housing. [13] Battery according to claim 12, wherein the first cover section has a thickness corresponding to a distance between the first current collector and the upper inner surface of the battery housing. [14] Battery according to claim 2, wherein the second covering section covers an entire exposed outermost side of the first uncoated area to prevent the first uncoated area from being exposed towards an inner circumferential surface of the battery housing. [15] Battery according to claim 2, wherein an extended length of the second cover section is greater than or equal to an extended length of the first uncoated area. [16] Battery according to claim 10, wherein an extended length of the second cover section is greater than or equal to a length from a lower endpoint of a section line between the plurality of segments to a bend point of the plurality of segments. [17] Battery according to claim 3, wherein a lower end of the second cover section is arranged at a lower location than a lower end of the first uncoated area. [18] Battery according to claim 2, wherein the insulator comprises an insulating polymer material. [19] Battery according to claim 2, wherein the insulator is made of a material with elastic properties. [20] Battery according to claim 2, wherein the insulator has a central opening with a predetermined diameter in a center of the first cover section. [21] Battery according to claim 20, wherein a center of the first current collector and the winding center of the electrode assembly are arranged on the same line. [22] Battery according to claim 21, wherein the diameter of the first current collector is less than or equal to the diameter of the central opening of the insulator. [23] Battery according to claim 21, wherein the diameter of the first current collector is larger than a diameter of a central winding opening of the electrode assembly. [24] Battery according to claim 22, wherein the first cover section has a thickness corresponding to a distance between an end of the first uncoated area and an upper inner surface of the battery housing. [25] Battery according to claim 22, wherein at least a part of the first uncoated area is divided into a plurality of segments along the winding direction of the electrode assembly. [26] Battery according to claim 25, wherein the plurality of segments is bent along a radial direction of the electrode assembly. [27] Battery according to claim 25, wherein the plurality of segments overlap each other along a radial direction of the electrode assembly in several layers. [28] Battery according to claim 26, wherein the first cover section is arranged between a curved surface formed by the bending of the plurality of segments of the first uncoated area facing an upper inner surface of the battery housing and the upper inner surface of the battery housing. [29] Battery according to claim 28, wherein the first cover section has a thickness corresponding to a distance between the curved surface and the upper inner surface of the battery housing. [30] Battery according to claim 1, wherein the connection comprises: a body section inserted into the opening; an outer flange section extending from a lateral circumference of the body section exposed by an upper outer surface of the battery housing along the outer surface; an inner flange section extending from an opposite side circumference of the body section exposed by an upper inner surface of the battery housing to the inner surface; and a flat section that is provided within the inner flange section. [31] Battery according to claim 30, wherein the flat section and the upper inner surface of the battery housing are parallel to each other. [32] Battery according to claim 30, wherein the flat section and the first current collector are parallel to each other. [33] Battery according to claim 30, wherein the body section, the inner flange section and the flat section of the connector are inserted through the through-hole into the battery housing. [34] Battery according to claim 30, wherein the inner flange section is riveted and fastened to the upper inner surface of the battery housing. [35] Battery according to claim 30, wherein the diameter of the central opening of the insulator is greater than or equal to the diameter of the body section. [36] Battery according to claim 30, wherein the diameter of the central opening of the insulator is greater than or equal to the diameter of the inner flange section. [37] Battery according to claim 30, wherein the body section of the connector passes through the central opening of the insulator. [38] Battery according to claim 30, wherein the flat section of the connection is electrically coupled to the first current collector through the central opening of the insulator. [39] Battery according to claim 38, wherein the flat section of the connection is coupled to the first current collector by welding. [40] Battery according to claim 1, wherein the insulating seal is connected to the insulator and formed integrally with it. [41] Battery according to claim 2, further comprising: a side spacer that covers at least part of an outer circumferential surface of the electrode assembly and contacts an inner circumferential surface of the battery housing. [42] Battery according to claim 41, wherein the side spacer covers at least a part of an outer circumferential surface of the electrode assembly along an outer circumference of the electrode assembly. [43] Battery according to claim 41, wherein the side spacer has a thickness corresponding to a distance between an outer circumferential surface of the electrode assembly and an inner circumferential surface of the battery housing. [44] Battery according to claim 41, wherein the side spacer is connected to the insulator and formed integrally with it. [45] Battery according to claim 41, wherein the side spacer comprises an insulating polymer material. [46] Battery according to claim 41, wherein the side spacer is formed from a material with elastic properties. [47] Battery according to claim 1, further comprising: a second current collector that is coupled to the second uncoated area below the electrode assembly. [48] ​​Battery according to claim 49, wherein the battery housing comprises: a corrugated section formed at one end adjacent to an opening section formed on the underside and pressed inwards; and a crimp section formed on one side that is closer to the opening section than the bead section, and which extends towards the opening section and is bent. [49] Battery according to claim 48, wherein the second current collector comprises: at least one tab coupling section that is coupled to the second uncoated area; and at least one housing coupling section that is electrically coupled to the corrugated section of the inner surface of the battery housing. [50] Battery according to claim 49, wherein the housing coupling section is compressed and fixed by the crimp section. [51] Battery according to claim 49, wherein the housing coupling section is coupled to the bead section by welding. [52] Battery according to claim 47, further comprising: a cap to cover the opening section of the battery housing. [53] Battery according to claim 52, further comprising: a lower spacer positioned between the cap and the second current collector to prevent movement of the electrode assembly. [54] Battery according to claim 53, wherein the lower spacer has a height that corresponds to a distance between the second current collector and the cap. [55] Battery according to claim 54, wherein the lower spacer comprises an insulating polymer material. [56] Battery according to claim 53, wherein the lower spacer is formed from a material with elastic properties. [57] Battery according to claim 2, wherein the thickness of the first cover section differs from the thickness of the second cover section. [58] Battery according to claim 2, wherein the thickness of the second cover section is less than the thickness of the first cover section. [59] Battery according to claim 2, wherein the first cover section comprises a circular section with a predetermined radius of curvature on an outer circumference of the first cover section. [60] Battery according to claim 59, wherein the round section is formed at an intersection between an upper surface of the first cover section and a side of the second cover section. [61] Battery according to claim 59, wherein the radius of curvature of the circular section is less than or equal to a radius of curvature formed at the intersection between the upper inner surface of the battery housing and the side of the battery housing. [62] Battery according to claim 61, wherein the round section comes into close contact with the inner surface of the battery housing without gaps. [63] Battery according to claim 2, wherein the first cover section and the second cover section are formed in one piece. [64] Battery according to claim 2, wherein the first cover section and the second cover section are formed separately and combined with each other. [65] Battery according to claim 1, wherein the insulating seal comprises: a seal exposure section located between the outer flange section and the battery housing; and a sealing insertion section located between the inner flange section and the battery housing, and where the seal exposure section and the seal insertion section have different thicknesses for each location. [66] Battery according to claim 20, wherein a plurality of openings with a smaller diameter than the central opening are further formed around the central opening of the first cover section. [67] Battery pack comprising: a plurality of batteries according to any one of claims 1 to 66; and A storage case for holding a large number of batteries. [68] Vehicle comprising the battery pack according to claim 67.

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