Batteries, battery packs containing the same, and automobiles

Abstract

According to one embodiment of the present invention, there is provided a battery comprising: an electrode assembly in which a core and an outer circumferential surface are defined by winding a first electrode, a second electrode, and a separator interposed therebetween around a winding shaft, the first electrode and the second electrode including a first uncoated portion and a second uncoated portion, respectively, that are not coated with an active material layer along the winding direction; a housing that accommodates the electrode assembly through an opening formed at a lower end; a first current collector that is coupled to the first uncoated portion and positioned within the housing; a cap that covers the opening; a spacer that is disposed between the cap and the electrode assembly to fix the electrode assembly and seal the housing; and a terminal that is electrically connected to the second uncoated portion.

Description

[Technical Field]

[0001] The present invention relates to a battery, a battery pack including the same, and a vehicle. More specifically, the present invention relates to a battery having a structure that can minimize movement of an internal electrode assembly, a battery pack including the same, and a vehicle.

[0002] This application is a Korean patent application No. 10-2021-0022894 filed on February 19, 2021, Korean patent application No. 10-2021-0022893 filed on February 19, 2021, Korean patent application No. 10-2021-0022881 filed on February 19, 2021, Korean patent application No. 10-2021-0030291 filed on March 8, 2021, Korean patent application No. 10-2021-0030291 filed on October 1, 2021 Priority is claimed based on Korean Patent Application No. 10-2021-0131215, filed on October 1, 2021, Korean Patent Application No. 10-2021-0131207, filed on October 1, 2021, Korean Patent Application No. 10-2021-0131208, filed on October 29, 2021, and Korean Patent Application No. 10-2021-0147363, filed on October 29, 2021, and the contents disclosed in the specifications and drawings of those applications are incorporated into this application in their entirety. [Background technology]

[0003] To maximize the current collection efficiency of a battery, a jelly roll is used in which positive and negative electrode tabs extend vertically along the height of the housing. In a battery using such a jelly roll, a current collector may be used as an intermediate medium for connecting the positive and negative electrode tabs to the terminals and the housing.

[0004] In this case, for example, the positive electrode current collector may be coupled to the positive electrode tab while covering one side of the jelly roll structure, and the negative electrode current collector may be coupled to the negative electrode tab while covering the other side of the jelly roll structure. Also, the positive electrode current collector may be electrically connected to a terminal, and the negative electrode current collector may be electrically connected to a housing.

[0005] In a battery having the above structure, a relatively large empty space may be formed between the negative electrode current collector and the cap, and an empty space may also be formed between the bottom surface of the housing opposite the cap and the positive electrode current collector.

[0006] Such empty spaces can cause the jelly roll to move vertically within the housing, i.e., in the battery height direction. If the jelly roll moves vertically, damage can occur to the bonded portions between the current collector and the electrode tab, as well as to the bonded portions between the current collector and the housing and between the current collector and the terminal.

[0007] Therefore, it is necessary to minimize the space for the jelly roll to move. Also, if additional parts are added to reduce the space for the jelly roll to move, the process becomes more complicated and the manufacturing cost increases. Therefore, it is necessary to solve this problem by utilizing parts that have already been used in the past. Summary of the Invention [Problem to be solved by the invention]

[0008] SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and aims to prevent damage to electrical connections caused by movement of the jelly roll within the housing.

[0009] Another object of the present invention is to prevent the movement of a jelly roll by utilizing components that have been conventionally applied in battery manufacturing, thereby preventing the complication of manufacturing processes and the increase in manufacturing costs that would occur due to the application of additional components.

[0010] However, the technical problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems will be clearly understood by those skilled in the art from the following description of the invention. [Means for solving the problem]

[0011] To solve the above-mentioned problems, one aspect of the present invention provides a battery comprising an electrode assembly in which a core and an outer circumferential surface are defined by winding a first electrode, a second electrode, and a separator interposed therebetween around a winding shaft, the first electrode and the second electrode each including a first uncoated portion and a second uncoated portion that are not coated with an active material layer along the winding direction, the electrode assembly including: a housing that accommodates the electrode assembly through an opening formed at a lower end; a first current collector that is coupled to the first uncoated portion and positioned within the housing; a cap that covers the opening; a spacer that is disposed between the cap and the electrode assembly to fix the electrode assembly and seal the housing; and a terminal that is electrically connected to the second uncoated portion.

[0012] The spacer may include a movement prevention portion interposed between the first current collector and the cap, a sealing portion interposed between the housing and the cap, and a connecting portion connecting the movement prevention portion and the sealing portion.

[0013] The movement prevention portion may have a height corresponding to the distance between the first current collector and the cap.

[0014] The movement prevention portion may be located at a center on one surface of the electrode assembly.

[0015] The movement prevention portion may include a spacer hole formed at a position corresponding to a winding center hole of the electrode assembly.

[0016] The sealing portion may have a shape that extends along the periphery of the inner circumferential surface of the housing.

[0017] The housing may include a beading portion formed by being pressed around the outer periphery, and a crimping portion whose end defining the opening below the beading portion is extended and bent to wrap around the periphery of the cap.

[0018] The sealing portion may be folded along the crimping portion to enclose the periphery of the cap.

[0019] The connecting portion may include a plurality of extension legs extending from the motion prevention portion in a radial, cross-like, or combination thereof shape.

[0020] The extension legs may be configured not to contact the first current collector.

[0021] The extension legs may be configured to not contact the cap.

[0022] The first current collector may include a support portion located at a center on one surface of the electrode assembly, a non-coating portion coupling portion extending from the support portion and coupled to the first non-coating portion, and a housing contact portion extending from the support portion or from an end of the non-coating portion coupling portion and interposed between the housing and the sealing portion.

[0023] The support may include a first current collector hole formed at a position corresponding to a winding center hole of the electrode assembly.

[0024] The housing may include a beading portion formed by pressing a portion of a side wall of the housing inward, and a crimping portion formed by extending and bending an end of the beading portion to define the opening below the beading portion so as to surround the periphery of the cap, and the housing contact portion may contact one surface of the beading portion facing the cap.

[0025] The sealing portion may be bent along the crimping portion to enclose a periphery of the cap and fill a gap between the housing contact portion and the cap.

[0026] The sealing portion may be formed such that a thickness between the housing contact portion and the cap is thinner than a thickness between the beading portion and the cap.

[0027] The sealing portion may have a greater compressibility between the housing contact portion and the cap than between the beading portion and the cap.

[0028] The sealing portion may have a compression rate between the housing contact portion and the cap that is the same as a compression rate between the beading portion and the cap.

[0029] The movement prevention portion may cover the support portion so that the support portion is not exposed to the outside of the movement prevention portion.

[0030] The cap may include a venting portion having a thickness smaller than a surrounding area, and the movement prevention portion may be located inside the venting portion so as not to cover the venting portion.

[0031] The connecting portion may be positioned so as not to overlap the housing contact portion in a height direction of the battery.

[0032] The battery may further include a second current collector coupled to the second uncoated portion, and an insulator interposed between a closing portion formed at an upper end of the housing and the second current collector.

[0033] The insulator may have a height corresponding to the distance between the second current collector and the closure.

[0034] In order to achieve the above object, a battery pack according to another embodiment of the present invention includes a plurality of batteries according to the above embodiment of the present invention.

[0035] The plurality of batteries may be arranged in a predetermined number of rows, with the terminals and outer surfaces of the housing closure of each battery facing upward.

[0036] The battery pack may include a plurality of bus bars connecting the plurality of batteries in series and parallel, and the plurality of bus bars may be disposed on top of the plurality of batteries, wherein each of the plurality of bus bars may include a body portion extending between terminals of adjacent batteries, a plurality of first bus bar terminals extending to one side of the body portion and electrically coupled to terminals of the batteries located on the one side, and a plurality of second bus bar terminals extending to the other side of the body portion and electrically coupled to an outer surface of a closure portion of a housing of the batteries located on the other side.

[0037] In order to solve the above-mentioned problems, a vehicle according to yet another aspect of the present invention includes a battery pack according to an aspect of the present invention.

[0038] Meanwhile, according to another aspect, in order to solve the above-mentioned problems, a battery according to one aspect of the present invention may include an electrode assembly having a first uncoated portion and a second uncoated portion, a housing that receives the electrode assembly through an opening formed at a lower end, a first current collector that is coupled to the first uncoated portion within the housing, and a spacer that has a central portion that supports a bottom of the first current collector and a peripheral portion that contacts the housing.

[0039] The battery may further include a terminal electrically connected to the second uncoated portion.

[0040] The upper surface of the central portion may be located higher than the upper surface of the peripheral portion.

[0041] The central portion may include a spacer hole formed at a position corresponding to a winding center hole of the electrode assembly.

[0042] The periphery may extend toward an inner surface of the housing.

[0043] The spacer may further include a flange extending downward from an outer edge of the periphery.

[0044] The battery may further include a cap covering an opening formed at a lower end of the housing, wherein an upper surface of the central portion may contact a lower surface of the first current collector and a lower surface of the central portion may contact an inner surface of the cap.

[0045] Meanwhile, in order to solve the above-mentioned problems, according to another aspect of the present invention, a method for manufacturing a battery includes inserting an electrode assembly into a housing, positioning a current collector on a bottom surface of the electrode assembly, disposing a spacer so that the spacer contacts the current collector, sealing the housing around a periphery of the spacer, and connecting a cap to the housing.

[0046] The battery manufacturing method may further include connecting the cap to a periphery of the spacer such that the spacer extends from the cap toward the current collector.

[0047] The spacer sealing the housing may have a circumferentially extending edge. [Effects of the Invention]

[0048] According to one aspect of the present invention, movement of the jelly roll within the housing is minimized to prevent damage to electrical connections.

[0049] Furthermore, according to one aspect of the present invention, instead of applying additional parts to prevent the jelly roll from moving, parts that have been conventionally applied are utilized, thereby preventing the manufacturing process from becoming more complicated and the manufacturing costs from increasing.

[0050] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical concepts of the present invention. Therefore, the present invention should not be interpreted as being limited to the matters described in the drawings. [Brief explanation of the drawings]

[0051] [Figure 1] 1 is a perspective view showing the appearance of a cylindrical battery according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view showing the internal structure of a cylindrical battery according to an embodiment of the present invention. [Figure 3] 1 is a perspective view showing an exemplary embodiment of a first current collector applied to the present invention. FIG. [Figure 4] FIG. 2 is a partial cross-sectional view showing an area where the one-piece spacer of the present invention is applied. [Figure 5] 1 is a perspective view showing an exemplary embodiment of a spacer of the present invention. [Figure 6] FIG. 2 is a plan view showing the bottom surface of the cylindrical battery of the present invention. [Figure 7] FIG. 2 is a partial cross-sectional view showing an area where the insulator of the present invention has been applied. [Figure 8] 1 is a view showing an electrode assembly having a segment formed thereon according to the present invention; [Figure 9] 1 is a top view illustrating a state in which a plurality of cylindrical batteries according to an embodiment of the present invention are connected in series and in parallel using bus bars. [Figure 10] 1 is a schematic diagram illustrating a battery pack according to an embodiment of the present invention. [Figure 11] 1 is a conceptual diagram showing a vehicle according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0052] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and claims should not be construed as being limited to their ordinary and dictionary meanings, but should be construed as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventor himself can appropriately define the concepts of terms in order to best explain the invention. Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention, and do not represent the entire technical ideas of the present invention, and therefore various equivalents and modifications that can be substituted therefor may exist at the time of filing this application.

[0053] In order to facilitate understanding of the invention, the accompanying drawings may not be drawn to scale, and the dimensions of some components may be exaggerated. In addition, the same reference numerals may be used to refer to the same components in different embodiments.

[0054] The expression that two comparison objects are identical means that they are "substantially identical." Therefore, "substantially identical" may include deviations that are considered low in the art, for example, deviations within 5%. Furthermore, the expression that a parameter is uniform in a given region means that the parameter is uniform on average in that region.

[0055] Furthermore, although terms such as "first" and "second" are used to indicate various components, these terms are not intended to limit the components. These terms are used merely to distinguish one component from another, and unless otherwise specified, the first component can also be the second component.

[0056] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0057] When an arbitrary structure is placed "on (or under)" a component or "above (or below)" a component, it means not only that the arbitrary structure is placed in contact with the upper surface (or lower surface) of the component, but also that other structures may be interposed between the component and the arbitrary structure placed above (or below) the component.

[0058] Furthermore, when a component is said to be "coupled," "coupled," or "connected" to another component, it does not only mean that the components are directly coupled or connected to each other, but also that other components are "intervening" between the components, or that each component is "coupled," "coupled," or "connected" through other components.

[0059] Throughout the specification, unless otherwise specified, "A and / or B" means A, B, or A and B, and "C to D" means C or more and D or less, unless otherwise specified.

[0060] 1 and 2, a battery 1 according to an embodiment of the present invention may be, for example, a cylindrical battery. The cylindrical battery 1 includes an electrode assembly 10, a housing 20, a first current collector 30, a cap 40, a spacer 50, and a terminal 60. In addition to the above-mentioned components, the cylindrical battery 1 may further include an insulating gasket G and / or a second current collector 70 and / or an insulator 80. The present invention is not limited by the shape of the battery and may also be applied to batteries of other shapes, such as prismatic batteries.

[0061] 2, 4, 7, and 8, the electrode assembly 10 includes a first uncoated region 11 and a second uncoated region 12. The electrode assembly 10 includes a first electrode having a first polarity, a second electrode having a second polarity, and a separator interposed between the first and second electrodes. The first electrode is a negative or positive electrode, and the second electrode has the opposite polarity to the first electrode.

[0062] The electrode assembly 10 may have, for example, a jelly-roll structure. That is, the electrode assembly 10 may be manufactured by sequentially stacking a first electrode, a separator, and a second electrode at least once and winding the stack. Such a jelly-roll type electrode assembly 10 may have a winding center hole C formed in its center and extending along the height direction (Z-axis direction). Meanwhile, a separator may be further provided on the outer periphery of the electrode assembly 10 to insulate it from the housing 20.

[0063] The first electrode includes a first conductive substrate and a first electrode active material layer formed by coating one or both surfaces of the first conductive substrate. A first uncoated portion, where the first electrode active material is not coated, exists at one end of the first conductive substrate in the width direction (Z-axis direction). The first uncoated portion extends from one end to the other end along the length of the first electrode when the first electrode is unfolded. The first uncoated portion 11 may function as a first electrode tab. The first uncoated portion 11 is provided on one surface of the electrode assembly 10. More specifically, the first uncoated portion 11 is provided at the lower side in the height direction (Z-axis direction) of the electrode assembly 10 housed within the housing 20.

[0064] The second electrode includes a second conductive substrate and a second electrode active material layer formed by coating one or both surfaces of the second conductive substrate. An uncoated portion, where the second electrode active material is not coated, exists at the other end of the second conductive substrate in the width direction (Z-axis direction). The second uncoated portion extends from one end to the other end along the length of the second electrode when the second electrode is unfolded. The second uncoated portion 12 may function as a second electrode tab. The second uncoated portion 12 is provided on the other side of the electrode assembly 10. More specifically, the second uncoated portion 12 is provided at the upper side in the height direction (Z-axis direction) of the electrode assembly 10 accommodated in the housing 20.

[0065] That is, the first uncoated portion 11 and the second uncoated portion 12 extend and protrude in opposite directions along the height direction (Z-axis direction) of the electrode assembly 10, i.e., the height direction of the cylindrical battery 1, and are exposed to the outside of the separator.

[0066] 8, at least a portion of the first uncoated region 11 and / or the second uncoated region 12 may include a plurality of segments F separated along the winding direction of the electrode assembly 10. In this case, the segments may be folded along the radial direction of the electrode assembly 10. The folded segments may overlap each other in multiple layers. In this case, the first current collector 30 and / or the second current collector 70, described below, may be bonded to a region where the multiple segments F overlap. Meanwhile, the electrode assembly 10 may include a welding target region, which is a region where the number of overlapping layers of the segments F of the first uncoated region 11 remains constant along the radial direction of the electrode assembly 10. Because the number of overlapping layers is maintained at a substantially maximum in this region, it is advantageous to perform welding between the first current collector 30 and the first uncoated region 11 and / or welding between the second current collector 70 and the second uncoated region 12, described below, within this region. This is to prevent the laser beam from penetrating the first uncoated portion 11 and / or the second uncoated portion 12 and damaging the electrode assembly 10 when the laser output is increased to improve welding quality, for example, when applying laser welding. Also, this is to effectively prevent foreign matter such as welding spatter from entering the inside of the electrode assembly 10.

[0067] In the present invention, the positive electrode active material coated on the positive electrode current collector and the negative electrode active material coated on the negative electrode current collector may be any active material known in the art without any limitations.

[0068] As an example, the positive electrode active material has the general chemical formula A[A x M y ]O 2+z(A includes at least one element selected from Li, Na, and K; M includes at least one element 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; and the stoichiometric coefficients of x, y, z, and the components included in M are selected to maintain electroneutrality of the compound).

[0069] As another example, the positive electrode active material may be an alkali metal compound xLiM disclosed in U.S. Pat. No. 6,677,082, U.S. Pat. No. 6,680,143, etc. 1 O2-(1-x)Li2M 2 O3(M 1 contains at least one element having an average oxidation state of 3; M 2 contains at least one element having an average oxidation state of 4; 0≦x≦1).

[0070] In yet another example, the positive electrode active material may be a compound represented by the general chemical formula Li a M 1 x Fe 1-x M 2 y P 1-y M 3 z O 4-z (M 1 contains at least one element selected from Ti, Si, Mn, Co, Fe, V, Cr, Mo, Ni, Nd, Al, Mg and Al; M 2 contains at least one element selected from Ti, Si, Mn, Co, Fe, V, Cr, Mo, Ni, Nd, Al, Mg, Al, As, Sb, Si, Ge, V and S; M 3 contains halogen elements, optionally including F; <a≦2、0≦x≦1、0≦y<1、0≦z<1;a、x、y、z、M 1 , M 2 and M 3wherein the stoichiometric coefficients of the components included are selected to maintain electroneutrality of the compound), or lithium metal phosphate represented by Li3M2(PO4)3, where M comprises at least one element selected from Ti, Si, Mn, Fe, Co, V, Cr, Mo, Ni, Al, Mg, and Al.

[0071] Preferably, the positive electrode active material may include primary particles and / or secondary particles formed by aggregation of the primary particles.

[0072] For example, the negative electrode active material may be a carbon material, lithium metal or a lithium metal compound, silicon or a silicon compound, or tin or a tin compound. Metal oxides with a potential of less than 2 V, such as TiO2 and SnO2, may also be used as the negative electrode active material. The carbon material may be either low-crystalline carbon or high-crystalline carbon.

[0073] The separator may be a porous polymer film, for example, a porous polymer film made of a polyolefin polymer such as an ethylene homopolymer, a propylene homopolymer, an ethylene / butene copolymer, an ethylene / hexene copolymer, an ethylene / methacrylate copolymer, etc., either alone or in a laminate. Alternatively, the separator may be a conventional porous nonwoven fabric, for example, a nonwoven fabric made of high-melting-point glass fiber, polyethylene terephthalate fiber, etc.

[0074] At least one surface of the separator may include a coating layer of inorganic particles. Alternatively, the separator itself may be made of a coating layer of inorganic particles. The particles constituting the coating layer may have a structure in which they are bound with a binder so that there is interstitial volume between adjacent particles.

[0075] The inorganic particles may be made of an inorganic material having a dielectric constant of 5 or more. Non-limiting examples of the inorganic particles include Pb(Zr,Ti)O3 (PZT), Pb 1-x La x Zr 1-y Tiy O3(PLZT), PB(Mg3Nb 2 / 3 )O3-PbTiO3 (PMN-PT), BaTiO3, hafnia (HfO2), SrTiO3, TiO2, Al2O3, ZrO2, SnO2, CeO2, MgO, CaO, ZnO, and Y2O3.

[0076] The electrolyte is A + B - The salt may have the structure: + Li + , Na + , K. + or a combination thereof. - is 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 - , C4F9SO3 - , CF3CF2SO3 - , (CF3SO2)2N - , (FSO2)2N - , CF3CF2(CF3)2CO - , (CF3SO2)2CH - , (SF5)3C - , (CF3SO2)3C - , CF3(CF2)7SO3, CF3CO2 - , CH3CO2 -, SCN - and (CF3CF2SO2)2N - The anion comprises one or more anions selected from the group consisting of:

[0077] The electrolyte may be dissolved in an organic solvent such as 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), γ-butyrolactone, or a mixture thereof.

[0078] 1, 2, 4, and 7, the housing 20 accommodates the electrode assembly 10 through an opening formed at its bottom. The housing 20 is a generally cylindrical container having an opening formed at its bottom and a closed portion formed at its top. The housing 20 may be made of a conductive material such as metal. The material of the housing 20 may be, for example, aluminum. The side (outer periphery) and top of the housing 20 may be integrally formed. The top (surface parallel to the XY plane) of the housing 20 may have a generally flat shape. The housing 20 accommodates the electrode assembly 10 and an electrolyte through an opening formed at its bottom.

[0079] The housing 20 is electrically connected to the electrode assembly 10. The housing 20 is connected to the first uncoated portion 11 of the electrode assembly 10. Therefore, the housing 20 has the same electrical polarity as the first uncoated portion 11.

[0080] 2 and 4, the housing 20 may include a beading portion 21 and a crimping portion 22 formed at its lower end. The beading portion 21 is formed below the electrode assembly 10 accommodated inside the housing 20. The beading portion 21 is formed by the housing 20 pressing in on the outer circumferential surface. The beading portion 21 partially reduces the inner diameter of the housing 20, thereby preventing the electrode assembly 10, which has a size approximately corresponding to the width of the housing 20, from slipping out of the opening formed at the lower end of the housing 20. The beading portion 21 may also function as a support on which the cap 40 is placed.

[0081] The crimping portion 22 is formed below the beading portion 21. The crimping portion 22 has a shape in which an end defining the opening of the housing 20 is extended and bent to enclose the peripheral portion of the cap 40 with the peripheral portion of the spacer 50 interposed therebetween.

[0082] 2 to 4, the first current collector 30 is coupled to the first uncoated portion 11 of the electrode assembly 10 and positioned within the housing 20. The first current collector 30 covers at least a portion of the lower surface of the electrode assembly 10. The combined assembly including the electrode assembly 10 and the first current collector 30 may be inserted into the housing 20 through an opening formed in the lower end of the housing 20. The first current collector 30 is electrically connected to the housing 20. That is, the first current collector 30 may function as a medium for electrical connection between the electrode assembly 10 and the housing 20.

[0083] Referring to FIG. 3 , the first current collector 30 may include, for example, a support portion 31, a non-coating portion coupling portion 32, and a housing contact portion 33. The support portion 31 is located approximately at the center of a surface formed at the lower end of the electrode assembly 10. The support portion 31 may be provided with a first current collector hole H1. In this case, the first current collector hole H1 may be formed at a position corresponding to the winding center hole C of the electrode assembly 10. The first current collector hole H1 may function as a passage for inserting a welding rod or irradiating a laser for connecting the terminal 60 and the second current collector 70, which will be described later. In addition, the first current collector hole H1 may also function as a passage for smoothly impregnating the interior of the electrode assembly 10 with the electrolyte during electrolyte injection.

[0084] The non-coating portion coupling portion 32 extends from the support portion 31 and couples with the first non-coating portion 11. For example, a plurality of non-coating portion coupling portions 32 may be provided. In this case, each of the non-coating portion coupling portions 32 may extend radially from the support portion 31. The housing contact portion 33 may extend from the support portion 31 as shown in FIG. 3 or, unlike FIG. 3, may extend from an end of the non-coating portion coupling portion 32. An end of the housing contact portion 33 is interposed between a sealing portion 52 of a spacer 50 (described below) and the housing 20 to contact the housing 20, thereby establishing an electrical connection between the housing 20 and the first current collector 30. The end of the housing contact portion 33 may contact, for example, one surface of the beading portion 21 facing the cap 40.

[0085] For example, a plurality of housing contact portions 33 may be provided. In this case, the plurality of housing contact portions 33 may have a shape extending radially from the support portion 31 as shown in Fig. 3, and at least one housing contact portion 33 may be located between adjacent plain portion coupling portions 32. Alternatively, the plurality of housing contact portions 33 may have a shape extending from each end of the plurality of plain portion coupling portions 32, unlike Fig. 3.

[0086] 2, 4, and 6, the cap 40 covers an opening formed in the housing 20. The cap 40 may be made of, for example, a metal material to ensure rigidity. The cap 40 forms the bottom surface of the cylindrical battery 1. In the cylindrical battery 1 of the present invention, the cap 40 may have no polarity even if it is made of a conductive metal material. "No polarity" means that the cap 40 is electrically insulated from the housing 20 and the terminal 60. Therefore, the cap 40 does not function as a positive or negative terminal. Therefore, the cap 40 does not need to be electrically connected to the electrode assembly 10 and the housing 20, and its material does not necessarily need to be a conductive metal.

[0087] When the housing 20 of the present invention has a beading portion 21, the cap 40 may be placed on the beading portion 21 formed on the housing 20. When the housing 20 of the present invention has a crimping portion 22, the cap 40 is fixed by the crimping portion 22. A peripheral portion of a spacer 50 is interposed between the cap 40 and the crimping portion 22 of the housing 20 to ensure airtightness of the housing 20.

[0088] 4 and 6, the cap 40 may further include a venting portion 41 to prevent the internal pressure of the housing 20 from increasing beyond a predetermined value due to gas generated inside the housing 20. The venting portion 41 corresponds to a region of the cap 40 that is thinner than the surrounding region. The venting portion 41 is structurally weaker than the surrounding region. Therefore, if an abnormality occurs in the cylindrical battery 1 and the internal pressure of the housing 20 increases above a certain level, the venting portion 41 may break, allowing the gas generated inside the housing 20 to be discharged. The venting portion 41 may be formed, for example, by notching one or both surfaces of the cap 40 to partially reduce the thickness of the housing 20.

[0089] 4, it is preferable that the lower end of the cap 40 is located higher than the lower end of the housing 20. In this case, even if the lower end of the housing 20 contacts the ground or the bottom of a housing for configuring a module or pack, the cap 40 does not contact the ground or the bottom of the housing. This prevents the pressure required to break the venting portion 41 from varying from the designed value due to the weight of the cylindrical battery 1, thereby ensuring smooth breaking of the venting portion 41.

[0090] On the other hand, when the venting portion 41 has a closed loop shape as shown in Figures 4 and 6, the greater the distance from the center of the cap 40 to the venting portion 41, the greater the force acting on the venting portion 41 when the same venting pressure is applied, making it easier to rupture. Also, the greater the distance from the center of the cap 40 to the venting portion 41, the more advantageous it is in terms of smooth discharge of venting gas. From this perspective, it is advantageous for the venting portion 41 to be formed along the periphery of a substantially flat region that protrudes downward (downward in Figure 4) from the peripheral region of the cap 40.

[0091] 6 shows the venting portion 41 formed continuously in a substantially circular shape, but the present invention is not limited thereto. The venting portion 41 may be formed discontinuously in a substantially circular shape on the cap 40, or may be formed in a substantially linear shape or in other shapes.

[0092] 2, 4, and 5, the spacer 50 is configured to prevent movement of the electrode assembly 10 and strengthen the sealing force of the housing 20. That is, the spacer 50 is disposed between the cap 40 and the electrode assembly 10 to fix the electrode assembly 10 and seal the housing 20. The spacer 50 may include a central portion that supports the bottom of the first current collector 30 and a peripheral portion that contacts the housing 20. In this case, the top surface of the central portion may be higher than the top surface of the peripheral portion. The top surface of the central portion may contact the bottom surface of the first current collector 30, and the bottom surface of the central portion may contact the inner surface of the cap 40. The central portion may have a spacer hole H2 formed at a position corresponding to the winding center hole C of the electrode assembly 10. The peripheral portion may extend toward the inner surface of the housing 20. The spacer 50 may further include a flange extending downward from the outer edge of the peripheral portion. In this case, the flange may be folded together with the housing 20 to enclose the end of the cap 40 when the housing 20 is crimped.

[0093] In another embodiment, the spacer 50 may include, for example, a movement prevention portion 51, a sealing portion 52, and a connecting portion 53. The movement prevention portion 51 is interposed between the first current collector 30 and the cap 40. The movement prevention portion 51 may have a height corresponding to the distance between the first current collector 30 and the cap 40. In this case, the movement prevention portion 51 may effectively prevent the electrode assembly 10 from moving within the housing 20 due to a clearance formed between the first current collector 30 and the cap 40. Therefore, the movement prevention portion 51 may prevent damage to the bonding portion between the electrode assembly 10 and the first current collector 30 and / or the bonding portion between the first current collector 30 and the housing 20.

[0094] The movement prevention portion 51 may be located approximately at the center of the lower surface of the electrode assembly 10. The movement prevention portion 51 may include a spacer hole H2 formed at a position corresponding to the winding center hole C of the electrode assembly 10. The spacer hole H2 may function as a passage for inserting a welding rod or a passage for laser irradiation, similar to the first current collector hole H1 described above. The spacer hole H2 may also function as a passage for smoothly impregnating the inside of the electrode assembly 10 with electrolyte, similar to the first current collector hole H1 described above.

[0095] Meanwhile, the movement prevention part 51 may cover the support part 31 of the first current collector 30 so that the support part 31 is not exposed to the outside of the movement prevention part 51. That is, the outer diameter of the upper end of the movement prevention part 51 may be approximately the same as or larger than the outer diameter of the support part 31. In this case, the movement prevention part 51 may effectively press the first current collector 30.

[0096] In another embodiment, the movement preventing portion 51 may be configured to cover at least a portion of a weld formed by welding the uncoated portion joining portion 32 of the first current collector 30 and the first uncoated portion 11. That is, the radius of the upper end of the movement preventing portion 51 may be greater than the distance from the weld located closest to the core of the electrode assembly 10 to the core of the electrode assembly 10. In this case, the movement preventing portion 51 may effectively prevent the welded portion between the first current collector 30 and the first uncoated portion 11 from being damaged during, for example, a crimping process or a sizing process.

[0097] In yet another embodiment, the movement prevention portion 51 may be located inward in the core direction from the venting portion 41 formed in the cap 40 so as not to cover the venting portion 41. That is, the radius measured at the upper end of the movement prevention portion 51 may be smaller than the distance from the center of the cap 40 to the venting portion 41. This is to prevent the venting portion 41 from being blocked by the spacer 50, thereby causing the rupture pressure of the venting portion 41 to deviate from the design value.

[0098] The sealing portion 52 is interposed between the housing 20 and the cap 40. The sealing portion 52 may extend along the inner circumferential surface of the housing 20. If the housing 20 includes the crimping portion 22, the sealing portion 52 may be folded along the bent shape of the crimping portion 22 to enclose the peripheral region of the cap 40. In another embodiment, the sealing portion 52 may be folded along the crimping portion 22 to enclose the peripheral edge of the cap 40 and fill the gap between the housing contact portion 33 and the cap 40. In this manner, the sealing portion 52 may function as a gasket to improve the fixing strength of the cap 40 and the sealing strength of the housing 20.

[0099] Meanwhile, the sealing portion 52 may be formed so that the thickness between the housing contact portion 33 and the cap 40 is thinner than the thickness between the beading portion 21 and the cap 40. This is because the sealing portion 52 is compressed more in the region where the housing contact portion 33 is interposed between the cap 40 and the beading portion 21 than in other regions. Therefore, the compression rate of the sealing portion 52 between the housing contact portion 33 and the cap 40 may be greater than the compression rate between the beading portion 21 and the cap 40. Alternatively, the compression rate of the sealing portion 52 between the housing contact portion 33 and the cap 40 may be substantially the same as the compression rate between the beading portion 21 and the cap 40. In this case, it is possible to prevent a phenomenon in which the sealing force is partially reduced due to the compression rate of the sealing portion 52 varying depending on the region.

[0100] The connecting portion 53 connects the movement prevention portion 51 and the sealing portion 52. The connecting portion 53 may include a plurality of extension legs 53a extending from the movement prevention portion 51 in a radial, cross, or combination thereof shape. When the connecting portion 53 is configured in this manner, electrolyte can be smoothly injected through the spaces between adjacent extension legs 53a, and internal gas can be smoothly discharged when venting occurs due to an increase in internal pressure.

[0101] As shown in FIG. 4 , the extension legs 53a may be configured not to contact the cap 40 and / or other portions of the housing contact portion 33 of the first current collector 30 except for the portion inserted into the crimping portion 22. For example, the connecting portion 53 may be positioned so as not to overlap the housing contact portion 33 along the height direction (Z-axis direction) of the cylindrical battery 1. In particular, if the extension legs 53a extend radially from the movement prevention portion 51 and the housing contact portions 33 extend radially from the support portion 31, the extension legs 53a and the housing contact portions 33 may be alternately positioned so as not to overlap each other in the vertical direction. In this case, even if a compressive force is applied to the housing 20 in the vertical direction, causing deformation of the components, interference between the extension legs 53a and the housing contact portions 33 is significantly reduced, thereby significantly reducing the possibility of problems such as damage to the connection between the components.

[0102] In this case, even if the spacer 50 is deformed due to a sizing process that compresses the cylindrical battery 1 along the height direction (Z-axis direction) or other reasons, interference between the connection portion 53 of the spacer 50 and the housing contact portion 33 of the first current collector 30 can be minimized. In particular, if the extension leg 53a is configured not to come into contact with the cap 40, the possibility of the extension leg 53a being deformed can be reduced even if deformation occurs in the housing 20 due to the sizing process or external impact.

[0103] Meanwhile, the components constituting the spacer 50 may be integrally formed. For example, the spacer 50 may be manufactured by injection molding, with the movement prevention portion 51, sealing portion 52, and connecting portion 53 integrated into one piece. That is, the cylindrical battery 1 of the present invention can achieve both an enhanced sealing force for the opening of the housing 20 and movement prevention effect for the electrode assembly 10 through a single component by modifying and manufacturing the gasket component used to seal the opening of the housing 20. Therefore, the present invention can prevent the complication of the manufacturing process and the increase in manufacturing costs that would occur due to the use of additional components.

[0104] 1, 2, and 7, the terminal 60 is electrically connected to the second uncoated portion 12 of the electrode assembly 10. The terminal 60 may, for example, pass through approximately the center of a closed portion formed at the upper end of the housing 20. A portion of the terminal 60 may be exposed at the top of the housing 20, and the remaining portion may be located inside the housing 20. The terminal 60 may be fixed to the inner surface of the closed portion of the housing 20 by, for example, riveting.

[0105] As described above, in the present invention, the housing 20 is electrically connected to the first uncoated portion 11 of the electrode assembly 10, so the closed portion formed at the upper end of the housing 20 can function as the first electrode terminal 20a having the first polarity. Meanwhile, the terminal 60 is electrically connected to the second uncoated portion 12 of the electrode assembly 10, so the terminal 60 exposed to the outside of the housing 20 can function as the second electrode terminal.

[0106] That is, the cylindrical battery 1 of the present invention has a structure in which a pair of electrode terminals (terminal 60, first electrode terminal 20a) are positioned in the same direction. Therefore, when electrically connecting multiple cylindrical batteries 1, it is possible to arrange an electrical connection component such as a bus bar on only one side of the cylindrical battery 1. This can simplify the battery pack structure and improve energy density. Furthermore, the cylindrical battery 1 has a structure in which one surface of the housing 20, which has a substantially flat shape, is used as the first electrode terminal 20a, thereby ensuring a sufficient bonding area for bonding an electrical connection component such as a bus bar to the first electrode terminal 20a. As a result, the cylindrical battery 1 can ensure sufficient bonding strength between the electrical connection component and the first electrode terminal 20a and reduce resistance at the bonding site to a desired level.

[0107] As described above, when the terminal 60 functions as a second electrode terminal, the terminal 60 is electrically insulated from the housing 20 having the first polarity. The electrical insulation between the housing 20 and the terminal 60 can be achieved in various ways. For example, the insulation can be achieved by interposing an insulating gasket G between the terminal 60 and the housing 20. Alternatively, the insulation can be achieved by forming an insulating coating layer on a portion of the terminal 60. Alternatively, the terminal 60 and the housing 20 can be spaced apart from each other to prevent contact therebetween, and the terminal 60 can be structurally firmly fixed. Alternatively, a combination of the above-mentioned methods can be used.

[0108] Meanwhile, when an insulating gasket G is used for electrical insulation and riveting is used to fix the terminal 60, the insulating gasket G may be deformed together with the terminal 60 when riveting the terminal 60, and may be bent toward the inner surface of the upper closure of the housing 20. When the insulating gasket G is made of a resin material, the insulating gasket G may be joined to the housing 20 and the terminal 60 by thermal fusion. In this case, the airtightness at the joining interface between the insulating gasket G and the terminal 60 and at the joining interface between the insulating gasket G and the housing 20 is enhanced.

[0109] 2 and 7, the second current collector 70 is coupled to the upper portion of the electrode assembly 10. The second current collector 70 is made of a conductive metal material and is coupled to the second uncoated portion 12. The coupling between the second uncoated portion 12 and the second current collector 70 may be performed by, for example, laser welding.

[0110] 2 and 7, the insulator 80 is interposed between a closing portion formed at the upper end of the housing 20 and the upper end of the electrode assembly 10, or between the closing portion and the second current collector 70. The insulator 80 may be made of, for example, an insulating resin material. The insulator 80 prevents contact between the electrode assembly 10 and the housing 20 and / or between the electrode assembly 10 and the second current collector 70.

[0111] The insulator 80 may also be interposed between the upper end of the outer periphery of the electrode assembly 10 and the inner surface of the housing 20. In this case, it is possible to prevent the second uncoated portion 12 of the electrode assembly 10 from coming into contact with the inner surface of the side wall of the housing 20, thereby preventing a short circuit from occurring.

[0112] The insulator 80 may have a height corresponding to the distance between the electrode assembly 10 and a closing portion formed at the upper end of the housing 20, or the distance between the closing portion and the second current collector 70. In this case, the electrode assembly 10 can be prevented from moving inside the housing 20, thereby significantly reducing the risk of damage to the coupling portions for electrical connection between components. When the insulator 80 is used together with the spacer 50 described above, the effect of preventing movement of the electrode assembly 10 can be maximized.

[0113] The insulator 80 may have an opening formed at a position corresponding to the winding center hole C of the electrode assembly 10. The terminal 60 may be in direct contact with the second current collector 70 through the opening.

[0114] The cylindrical battery 1 of the present invention described above has a structure in which resistance is minimized by expanding the welding area through the bent surfaces, multiple current paths using the first current collector 30, and minimizing the length of the current paths. The AC resistance of the cylindrical battery 1 measured with a resistance meter between the positive and negative electrodes, and between the terminal 60 and its surrounding flat surface (first electrode terminal 20a) may be approximately 0.5 mΩ to 4 mΩ, and preferably approximately 1 mΩ to 4 mΩ, which is suitable for fast charging.

[0115] Desirably, the cylindrical battery may be, for example, a cylindrical battery having a form factor ratio (defined as the diameter of a cylindrical battery divided by its height, i.e., the ratio of height (H) to diameter (Φ)) greater than about 0.4.

[0116] Here, form factor refers to values indicating the diameter and height of a cylindrical battery. Desirably, the diameter of a cylindrical battery may be approximately 40 mm to 50 mm, and the height may be approximately 60 mm to 130 mm. Cylindrical batteries according to one embodiment of the present invention may be, for example, 46110 batteries, 4875 batteries, 48110 batteries, 4880 batteries, or 4680 batteries. In the numerical value indicating the form factor, the first two digits indicate the diameter of the battery, and the remaining digits indicate the height of the battery.

[0117] When a tab-less electrode assembly is applied to a cylindrical battery with a form factor ratio exceeding 0.4, the uncoated portion is susceptible to tearing due to the large radial stress applied when the uncoated portion is bent. Furthermore, when welding a current collector to the bent surface area of the uncoated portion, the number of uncoated portions stacked on the bent surface area must be increased to ensure sufficient weld strength and reduce resistance. These requirements can be met by the electrode and electrode assembly according to an embodiment (variant) of the present invention.

[0118] A battery according to one embodiment of the present invention may be a generally cylindrical battery having a diameter of about 46 mm, a height of about 110 mm, and a form factor ratio of about 0.418.

[0119] Another embodiment of the battery may be a generally cylindrical battery having a diameter of about 48 mm, a height of about 75 mm, and a form factor ratio of about 0.640.

[0120] In yet another embodiment, the battery may be a generally cylindrical battery having a diameter of about 48 mm, a height of about 110 mm, and a form factor ratio of about 0.418.

[0121] In yet another embodiment, the battery may be a generally cylindrical battery having a diameter of about 48 mm, a height of about 80 mm, and a form factor ratio of about 0.600.

[0122] In yet another embodiment, the battery may be a generally cylindrical battery having a diameter of about 46 mm, a height of about 80 mm, and a form factor ratio of about 0.575.

[0123] Conventionally, batteries with a form factor ratio of approximately 0.4 or less have been used. For example, 1865 batteries and 2170 batteries have been used. 1865 batteries have a diameter of approximately 18 mm and a height of approximately 65 mm, resulting in a form factor ratio of approximately 0.277. 2170 batteries have a diameter of approximately 21 mm and a height of approximately 70 mm, resulting in a form factor ratio of approximately 0.300.

[0124] Meanwhile, the method for manufacturing the battery 1 of the present invention described above includes the steps of inserting the electrode assembly 10 into the housing, positioning the current collector (first current collector) 30 on the bottom surface of the electrode assembly 10, arranging the spacer 50 so that it contacts the current collector 30, sealing the housing 20 around the periphery of the spacer 50, and connecting the cap 40 to the housing 20.

[0125] The manufacturing method may further include connecting the cap 40 to the periphery of the spacer 50 so that the spacer 50 extends from the cap 40 toward the current collector 30. The periphery of the spacer 50 sealing the housing 20 may have a shape that extends in the circumferential direction.

[0126] 9, a plurality of cylindrical batteries 1 may be connected in series and parallel at the top of the cylindrical batteries 1 using bus bars 150. The number of cylindrical batteries 1 may be increased or decreased depending on the capacity of the battery pack.

[0127] In each cylindrical battery 1, the terminal 60 may have a positive polarity and the outer surface of the closed part of the housing 20 (first electrode terminal 20a) may have a negative polarity. Of course, the opposite is also possible.

[0128] Preferably, a plurality of cylindrical batteries 1 may be arranged in a plurality of rows and columns. The columns are arranged vertically relative to the ground, and the rows are arranged horizontally relative to the ground. To maximize space efficiency, the cylindrical batteries 1 may be arranged in the closest packing structure. This closest packing structure is formed when an equilateral triangle is drawn when the centers of the terminals 60 exposed to the exterior of the housing 20 are connected to each other. Preferably, the bus bar 150 may be arranged on top of the plurality of cylindrical batteries 1, more preferably between adjacent columns. Alternatively, the bus bar 150 may be arranged between adjacent rows.

[0129] Preferably, the bus bars 150 connect the batteries 1 arranged in the same row in parallel to each other, and connect the cylindrical batteries 1 arranged in two adjacent rows in series to each other.

[0130] Preferably, the bus bar 150 may include a body portion 151, a plurality of first bus bar terminals 152, and a plurality of second bus bar terminals 153 for series and parallel connection.

[0131] The body portion 151 may extend between the terminals 60 of adjacent cylindrical batteries 1, preferably between rows of cylindrical batteries 1. Alternatively, the body portion 151 may extend along the row of cylindrical batteries 1, but may also be bent regularly, such as in a zigzag pattern.

[0132] The plurality of first bus bar terminals 152 may protrude from one side of the body part 151 toward the terminals 60 of each cylindrical battery 1 and be electrically coupled to the terminals 60. The electrical coupling between the first bus bar terminals 152 and the terminals 60 may be performed by laser welding, ultrasonic welding, etc. The plurality of second bus bar terminals 153 may be electrically coupled to the outer surface (first electrode terminals 20a) of each cylindrical battery 1 from the other side of the body part 151. The electrical coupling between the second bus bar terminals 153 and the outer surface (first electrode terminals 20a) may be performed by laser welding, ultrasonic welding, etc.

[0133] Preferably, the body portion 151, the plurality of first bus bar terminals 152, and the plurality of second bus bar terminals 153 may be formed from a single conductive metal plate. The metal plate may be, for example, an aluminum plate or a copper plate, but the present invention is not limited thereto. Alternatively, the body portion 151, the plurality of first bus bar terminals 152, and the second bus bar terminals 153 may be manufactured as separate pieces and then joined together by welding or the like.

[0134] In the cylindrical battery 1 according to the present invention, the terminal 60 having a positive polarity and the outer surface of the closed part of the housing 20 (first electrode terminal 20a) having a negative polarity are positioned in the same direction, so that electrical connection between cylindrical batteries 1 can be easily realized using the bus bar 150.

[0135] In addition, since the terminal 60 of the cylindrical battery 1 and the outer surface of the closed portion of the housing 20 (first electrode terminal 20a) have a large area, the connection area of the bus bar 150 can be sufficiently secured, thereby sufficiently reducing the resistance of the battery pack including the cylindrical battery 1.

[0136] 10, a battery pack 3 according to one embodiment of the present invention includes a battery assembly in which a plurality of cylindrical batteries 1 according to one embodiment of the present invention are electrically connected, and a pack housing 2 that accommodates the battery assembly. The electrical connection structure of the plurality of batteries 1 through bus bars is as exemplarily described above with reference to FIG. 9, and other components such as a cooling unit and power terminals are omitted for convenience of illustration.

[0137] 11, an automobile 5 according to an embodiment of the present invention may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle, and includes a battery pack 3 according to an embodiment of the present invention. The automobile 5 includes a four-wheeled vehicle and a two-wheeled vehicle. The automobile 5 operates by receiving a supply of power from the battery pack 3 according to an embodiment of the present invention.

[0138] As described above, the present invention has been described using limited embodiments and drawings, but the present invention is not limited thereto, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the claims. [Explanation of symbols]

[0139] 5: Automobiles 3: Battery pack 2: Pack housing 1: Cylindrical battery 10: Electrode assembly 11: First plain area 12: Second plain area C: Winding center hole 20: Housing 20a: First electrode terminal 21: Beading section 22: Crimping section 30: First current collector 31: Support part 32: Plain part joint 33: Housing contact part H1: First collector hole 40: Cap 41: Venting section 50: Spacer 51:Motion prevention part H2: Spacer hole 52: Sealing part 53:Connection part 53a: Extension leg 60:Terminal (second electrode terminal) G: Insulation gasket 70: Second current collector 80: Insulator

Claims

1. an electrode assembly in which a core and an outer circumferential surface are defined by winding a first electrode, a second electrode, and a separator interposed therebetween around a winding shaft, the first electrode and the second electrode including a first uncoated portion and a second uncoated portion, respectively, in which an active material layer is not coated along the winding direction; a housing for receiving the electrode assembly, the housing including a closed portion formed at one end and an open portion formed at the other end; a first current collector coupled to the first uncoated portion and positioned within the housing; a cap for covering the opening; a spacer disposed between the cap and the electrode assembly to secure the electrode assembly and seal the housing; a terminal electrically connected to the second uncoated portion at the one end of the housing; Including, the closing portion functions as an electrode terminal having a polarity different from that of the terminal by electrically connecting the housing and the first current collector; The spacer is a movement prevention portion interposed between the first current collector and the cap; a sealing portion interposed between the housing and the cap; a connecting portion connecting the movement prevention portion and the sealing portion; Including the battery.

2. The battery of claim 1 , wherein the movement prevention portion has a height corresponding to the distance between the first current collector and the cap.

3. The battery according to claim 1 or 2, wherein the movement prevention portion is located at a center on one surface of the electrode assembly.

4. The battery according to claim 1 , wherein the movement prevention portion comprises a spacer hole formed at a position corresponding to a winding center hole of the electrode assembly.

5. The sealing portion is The battery of claim 1 having an elongated configuration around the inner periphery of the housing.

6. The housing includes: a beading portion formed by pressing in the periphery of the outer circumferential surface; a crimping portion whose end defining the opening below the beading portion is extended and bent to wrap around the periphery of the cap; 6. The battery of claim 5, comprising:

7. The battery according to claim 6 , wherein the sealing portion is folded along the crimping portion to enclose the periphery of the cap.

8. The battery according to claim 1 , wherein the connecting portion includes a plurality of extension legs extending from the movement prevention portion in a radial, cross-like, or combination thereof shape.

9. The battery of claim 8 , wherein the plurality of extension legs are configured not to contact the first current collector.

10. The battery of claim 8 or 9, wherein the plurality of extension legs are configured not to contact the cap.

11. The first current collector is a support portion located at a center portion on one surface of the electrode assembly; a plain portion coupling portion extending from the support portion and coupled to the first plain portion; a housing contact portion extending from the support portion or from an end of the non-coating portion coupling portion and interposed between the housing and the sealing portion; 11. The battery of claim 8, comprising:

12. The battery of claim 11 , wherein the support portion comprises a first current collector hole formed at a position corresponding to a winding center hole of the electrode assembly.

13. The housing includes: a beading portion in which a part of the side wall is pressed inward; a crimping portion whose end defining the opening below the beading portion is extended and bent to wrap around the periphery of the cap; Including, The battery according to claim 11 or 12, wherein the housing contact portion contacts one surface of the beading portion facing the cap.

14. The battery according to claim 13 , wherein the sealing portion is folded along the crimping portion to enclose a periphery of the cap and fill a gap between the housing contact portion and the cap.

15. The battery according to claim 14 , wherein the sealing portion is formed so that a thickness between the housing contact portion and the cap is thinner than a thickness between the beading portion and the cap.

16. The battery according to claim 14 , wherein the sealing portion has a compressibility between the housing contact portion and the cap that is greater than a compressibility between the beading portion and the cap.

17. 15. The battery according to claim 14, wherein the sealing portion has a compressibility between the housing contact portion and the cap that is the same as a compressibility between the beading portion and the cap.

18. The battery according to claim 11 , wherein the movement prevention portion covers the support portion so that the support portion is not exposed to the outside of the movement prevention portion.

19. the cap has a venting portion having a reduced thickness compared to a surrounding area; The battery according to claim 1 , wherein the movement prevention portion is located inside the vent portion so as not to cover the vent portion.

20. The battery according to claim 11 , wherein the connecting portion is positioned so as not to overlap the housing contact portion in the height direction of the battery.

21. The battery a second current collector coupled to the second uncoated portion; an insulator interposed between the closing portion and the second current collector; 21. The battery of claim 1, further comprising:

22. 22. The battery of claim 21, wherein the insulator has a height corresponding to the distance between the second current collector and the closure.

23. 23. The battery of claim 1, wherein the resistance measured between the positive and negative electrodes is 4 mΩ or less.

24. 24. The battery of claim 1, wherein the battery has a form factor ratio of diameter divided by height greater than 0.

4.

25. A battery pack comprising a plurality of batteries according to any one of claims 1 to 24.

26. The plurality of batteries are arranged in a predetermined number of rows; 26. The battery pack of claim 25, wherein the terminals of each battery and the outer surface of the housing closure are disposed toward the top.

27. the battery pack includes a plurality of bus bars connecting the plurality of batteries in series and parallel, the plurality of bus bars are disposed on top of the plurality of batteries; Each of the plurality of bus bars is a body portion extending between the terminals of adjacent batteries; a plurality of first bus bar terminals extending to one side of the body portion and electrically coupled to terminals of a battery located at the one side; a plurality of second bus bar terminals extending to the other side of the body portion and electrically coupled to an outer surface of a closing portion of the battery housing located on the other side; 27. The battery pack of claim 25 or 26, comprising:

28. 27. A motor vehicle comprising the battery pack of claim 25 or 26.

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