WO2015102360A1 - Integrated secondary battery having winding-type secondary battery electrode assemblies connected in series and/or in parallel - Google Patents
Integrated secondary battery having winding-type secondary battery electrode assemblies connected in series and/or in parallel Download PDFInfo
- Publication number
- WO2015102360A1 WO2015102360A1 PCT/KR2014/013021 KR2014013021W WO2015102360A1 WO 2015102360 A1 WO2015102360 A1 WO 2015102360A1 KR 2014013021 W KR2014013021 W KR 2014013021W WO 2015102360 A1 WO2015102360 A1 WO 2015102360A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- secondary battery
- wound
- terminal
- current collector
- electrode assemblies
- Prior art date
Links
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an integrated secondary battery having a high output, high energy of 3 to 48 V by externally connected wound and secondary battery electrode assemblies in which an electrochemical charge / discharge reaction occurs in series and / or in parallel. .
- the lithium secondary battery is an energy storage device having high energy and power, and has an advantage of higher capacity or operating voltage than other batteries.
- the secondary battery may be manufactured in various shapes such as a cylindrical shape, a square shape, and a pouch type.
- the secondary battery may include a can type in which an electrode assembly is largely embedded in a cylindrical or rectangular metal can, and a pouch type electrode assembly in an aluminum laminate sheet. It may be classified into a pouch type embedded in a case.
- the secondary battery includes a secondary battery case, an electrode assembly accommodated in the secondary battery case together with an electrolyte, and a cap assembly sealingly coupled to an upper portion of the secondary battery case.
- the electrode assembly is a laminate of a positive electrode plate, a separator, and a negative electrode plate, and may have a wound structure in a substantially jelly-roll form.
- the positive electrode plate and the negative electrode plate of the electrode assembly include a current collector made of aluminum foil and copper foil, respectively. .
- the positive electrode active material and the negative electrode active material are coated on the current collector of the positive electrode plate and the current collector of the negative electrode plate, respectively, and electrode tabs are connected to a portion where the positive electrode active material or the negative electrode active material is not applied, that is, the uncoated portion.
- the electrode tab may be divided into a positive electrode tab and a negative electrode tab according to the type of the electrode plate to be connected.
- One of the positive electrode tab and the negative electrode tab is welded to the battery case and the other is welded to the cap assembly.
- the electrode assembly used in the conventional secondary battery has a structure in which a separator is inserted between a positive electrode plate connected with a plurality of positive electrode tabs of the same length and a negative electrode plate connected with a plurality of negative electrode tabs of the same length. It may have a structure wound in the form.
- the positive electrode tabs attached to the positive electrode plate are arranged in a row from the winding center in the upper direction, and the negative electrode tabs attached to the negative electrode plate are arranged in the lower direction in a row from the winding center. Is common.
- the positive electrode tabs arranged in the upper direction are electrically connected to the cap assembly of the battery by being combined with the positive electrode leads
- the negative electrode tabs arranged in the downward direction are electrically connected to the secondary battery case by being combined with the negative electrode leads.
- the present invention relates to a secondary battery, characterized in that the electrode assembly of the wound secondary battery having a large blade tab is directly connected to the terminal, by connecting the electrode assembly of the wound secondary battery in series and / or in parallel It can increase the mechanical adhesion of the electrode assemblies of the wound secondary battery, reduce the internal resistance to increase the electron transfer speed between the positive electrode and the negative electrode, and by connecting the large-sized wing-shaped electrode tab directly to the terminal, It is an object of the present invention to provide an integrated secondary battery including a reduced wound electrode assembly.
- the module manufacturing cost by manufacturing the exterior materials such as the partition wall and the battery case made of lightweight non-conductive plastics such as PP, PE, PVC or PET, to reduce the weight of the integrated secondary battery, the module manufacturing cost.
- the present invention provides a secondary battery, characterized in that directly connected to the wound secondary battery electrode assembly having a large blade tab of the positive electrode, the separator and the negative electrode in a terminal assembly to provide
- the integrated secondary battery including the wound secondary battery electrode assembly of the present invention includes a positive electrode current collector coated with a positive electrode active material on one or both sides, and a negative electrode current collector coated with a negative electrode active material on one or both surfaces thereof, and the positive electrode current collector and the negative electrode.
- a large area tab formed on a side of the wound electrode assembly wherein the separator includes a plurality of wound electrode assemblies wound around a current collector; A battery case; Barrier ribs separating the wound electrode assemblies; A terminal for electrically connecting the wound electrode assemblies; And an electrolyte solution, wherein the terminals are formed in the barrier ribs, and the wound electrode assemblies are connected in series and / or in parallel, thereby minimizing a space between the wound electrode assembly, the barrier ribs on which the terminals are formed, and a battery case that is an outer material. It is characterized by reducing the electrical resistance.
- the large area tab of the present invention is formed on a terminal non-coated portion to which the active material of the positive electrode current collector and the negative electrode current collector is not coated, and is formed at the middle portion of the wound electrode assembly or at both upper and lower ends thereof, and the large area tab.
- the width of is characterized in that the range of 10% to 80% of the height of the wound electrode assembly.
- the large-area tab of the present invention is directly connected to the terminal, which is preferably directly connected by any one or more of welding, soldering, adhesion of conductive chemicals, and connection circuit bolting.
- a terminal is formed in an area corresponding to the position of the large area tab connected to the wound electrode assembly, and polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), and polyethylene terephthalate (PET) are formed.
- PP polypropylene
- PE polyethylene
- PVC polyvinyl chloride
- PET polyethylene terephthalate
- At least one plastic material selected from the group consisting of), in addition to the partition wall battery case may also be used the same lightweight plastic material.
- the electrode assembly of the wound secondary battery having a large-sized wing tab is directly connected to the terminal, thereby increasing mechanical adhesion and reducing internal resistance, thereby increasing the speed of electron transfer between the positive electrode and the negative electrode.
- the large-size wing-shaped tab made of a large area there is an effect of reducing the internal resistance of the integrated secondary battery.
- the energy density and the electric capacity can be increased, and between the wound electrode assembly, the barrier rib formed with the terminal, and the exterior material (battery case) By minimizing the space, the internal resistance of the secondary battery can be reduced.
- the wound type secondary battery connected in series and / or parallel can be manufactured in one piece, which is easy to handle, and the exterior material is made of a light plastic material such as PP, PE, PVC, or PET to reduce the weight of the secondary battery and manufacture the module. It has the advantage of lowering the unit price.
- Figure 1 shows the wound battery having a large wing tab of the present invention in two forms according to the method of forming the tab.
- Figure 2 schematically shows a structure in which a wing tab connected to the wound electrode assembly of the present invention is coupled to a terminal on which a partition is formed.
- Figure 3 shows a cross-sectional view of the integrated secondary battery of the present invention in cross section (a) and top (b).
- Figure 4 shows a view from the top of the integrated secondary battery connected in series and parallel of the present invention.
- the wound electrode assembly 100 having the large wing-shaped tab of the present invention includes a cathode current collector coated with a cathode active material on one or both sides and an anode collector coated with an anode active material on one or both surfaces thereof. And a separator disposed between the positive electrode current collector and the negative electrode current collector.
- the tabs may be divided into two types as shown in FIG. 1 according to a method of forming tabs on the terminal non-coated portions (without the active material) of the positive electrode current collector and the negative electrode current collector.
- both ends of the end plain portions formed in the positive and negative electrode current collectors are cut to a predetermined length, and then the cut portions are sealed to seal the large area tabs 201 and 202 at the center of the electrode current collector. Can be formed.
- the middle portion of the non-coating portion of the electrode current collector and the terminal solid portions at both ends of the upper and lower ends are cut out, and the cut portions are sealed to seal the large area tabs at both upper and lower ends of the electrode current collector.
- 201a, 201b, 202a, and 202b may be formed.
- Separators are disposed between the cathode current collector and the anode current collector so as to be electrically insulated. For example, after the separators are coupled to the anode current collector, rolling is started to keep the electrode plates and the separators in parallel. The current collector and the separator are sequentially combined to roll together.
- the negative electrode active material which is an active material applied on the negative electrode current collector, is a material capable of reversibly intercalating / deintercalating lithium ions, a lithium metal, an alloy of lithium metal, a material that can be doped and undoped with lithium, or Transition metal oxides.
- any carbon-based negative electrode active material generally used in a lithium ion secondary battery may be used.
- Representative examples include crystalline carbon, Amorphous carbons or these may be used together.
- Examples of the crystalline carbon may include graphite such as amorphous, carbon, lean, spherical or fibrous natural graphite or artificial graphite.
- Examples of the amorphous carbon may include soft carbon or hard carbon, mesophase pitch carbide, Calcined coke, and the like.
- the alloy of the lithium metal lithium and Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al and Sn
- An alloy of a metal selected from the group may be used.
- Examples of the material doped and undoped with lithium include Si, SiO x (0 ⁇ x ⁇ 2), and Si-Q alloys (where Q is an alkali metal, an alkaline earth metal, and 13).
- An element selected from the group consisting of an element, a Group 14 element, a transition metal, a rare earth element, and a combination thereof, and not Sn), and at least one of them and SiO 2 may be mixed and used.
- the elements Q and R are Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Ti, Ge, P, As, Sb, Bi, It may be selected from the group consisting of S, Se, Te, Po, and combinations thereof, and may be used by mixing SiO 2 with at least one of them, if necessary.
- the transition metal oxide may include vanadium oxide, lithium vanadium oxide, and the like
- the crystalline carbon may be a carbonaceous or fibrous mesophase prepared from mesophase spherical particles through a carbonizing step and a graphitization step. Preference is given to graphite fibers prepared through a carbonization step and a graphitization step from pitch (mesophase pitch fiber).
- the separator used in the present invention is a polyolefin type such as ethylene homopolymer, propylene homopolymer, ethylene / butene copolymer, ethylene / hexene copolymer and ethylene / methacrylate copolymer, which are conventional porous polymer films used as conventional separators.
- a porous polymer film made of a polymer may be used alone or laminated, and may be used by coating a ceramic on at least one surface of a porous nonwoven fabric or a non-woven fabric made of a material such as high melting point glass fiber, polyethylene terephthalate fiber, or the like based on the polymer separator. It is not necessarily limited to this.
- the positive electrode current collector and the negative electrode current collector used in the electrode assembly of the present invention are metals having high conductivity, and any metal may be used as long as the active material can be easily applied and is not reactive in the voltage range of the battery.
- Representative examples include strip-shaped thin plates manufactured by aluminum, copper, gold, nickel, or alloys thereof, or a combination thereof.
- a thin aluminum plate is used as the positive electrode current collector and a copper thin plate is used as the negative electrode current collector. Used.
- the positive electrode tab 202 and the negative electrode tab 201 formed in the electrode assembly of the present invention is formed in a large area on the side of the electrode assembly to facilitate connection with the terminal. In addition, by connecting the terminal in a large area, the internal resistance is significantly reduced.
- the width (ie, length) of the large-area tab 200 formed in the present invention is preferably in the range of 10% to 80% of the height (or length) of the electrode assembly. If the width (ie, length) of the tab and the negative electrode tab is less than 10% of the height (or length) of the electrode assembly, the connection with the terminal becomes difficult, and the connection with the terminal 300 becomes small, so that The resistance is increased and there is a risk of short circuit.
- the widths (ie, lengths) of the formed positive and negative electrode tabs are 80% or more of the height (or vertical length) of the electrode assembly, the connection through the welding with the terminal may be easy, As the adhesion decreases, the internal resistance increases, and the electron transfer speed between the electrodes between the anode and the cathode decreases.
- FIG. 3 shows an integrated secondary battery in which a wound secondary battery electrode assembly of the present invention is connected in series through a terminal, and is shown schematically from the top.
- the integrated secondary battery connected in series is a rectangular battery case 10, a wound (secondary battery) electrode assembly 100 including a large area tab, and a plastic partition 400 separating the wound electrode assemblies.
- a terminal 300 electrically connecting the battery case and the wound secondary battery electrode assemblies, and an electrolyte (not shown), and when the n wound secondary battery electrode assemblies are connected in series, an integral secondary fabricated therefrom.
- the final voltage of the cell is n times the electrochemical voltage of the individual wound secondary battery electrode assembly.
- the integrated secondary battery of the present invention includes two or more wound electrode assemblies connected in series and a terminal electrically connecting the large area tabs of the wound electrode assemblies. Except for the enclosed area, a partition wall electrically and physically separates the wound electrode assemblies.
- the wound type electrode assembly is formed in series with respect to the case in which the large area tab is formed in the center of the electrode current collector. Even when the large-area tab is formed at the upper and lower portions, a person skilled in the art can adjust the position and shape of the terminal to form a unitary secondary battery by connecting the wound electrode assemblies in series. There will be.
- the partition 400 is preferably a plastic material for reducing the weight of the secondary battery and for electrical insulation, and may use at least one of PP, PE, PVC, and PET.
- a portion of the barrier rib, preferably formed in the region corresponding to the position of the large-area tab of the wound electrode assembly is electrically connected terminal, the size of the terminal located on the barrier rib electrode assembly It is desirable to have the same size or larger than the size of the large area tab formed in the.
- the terminal 300 is not particularly limited, and any terminal may be used as long as it is a material having high electrical conductivity, which is commonly used in the secondary battery art, and the terminals may be formed at the end of the positive and negative electrode current collectors, respectively. It can be attached to the positive electrode (large area) tab and the negative electrode (large area) tab by a method such as welding.
- the connection method between the terminal and the large-area tab may be a direct connection method such as soldering, adhesion of conductive chemicals, connection circuit bolting, etc., in addition to the welding method.
- the wound electrode assemblies connected in series are attached to a rectangular case made of a light material such as plastic, and impregnated with an electrolyte, followed by a sealing step, thereby manufacturing an integrated secondary battery connected in series.
- the integrated secondary battery of the present invention is easier to weld between the positive and negative electrode tabs and the terminal as compared to the conventional secondary battery, and by assembling the electrode assembly in a series of integrated, to increase the mechanical adhesion between the electrode assemblies and increase the internal resistance It is effective in increasing the electron transfer speed between the positive and negative electrodes.
- the wound electrode assemblies By connecting the wound electrode assemblies in series and in parallel, energy density and electrical storage capacity can be increased, and internal resistance can be minimized by minimizing the space between the wound electrode assembly, the inner wall to which the terminal is attached, and the exterior material.
- the wound electrode assembly connected in series and in parallel can be manufactured in an integral form, it is easy to handle, and the exterior material is made of a light material such as plastic, thereby reducing battery weight and reducing module manufacturing cost.
- the wound electrode assemblies may be used in a large capacity secondary battery module by only connecting the wound electrode assemblies in parallel.
- the integrated secondary battery according to the present invention can be preferably and effectively used in a medium-large battery module including a plurality of secondary battery cells, the medium-large battery module is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid It can be used in electric vehicles, power storage systems and the like.
- EV electric vehicle
- HEV hybrid electric vehicle
- plug-in hybrid plug-in hybrid It can be used in electric vehicles, power storage systems and the like.
- the present invention relates to a secondary battery, characterized in that the electrode assembly of the wound secondary battery having a large blade tab is directly connected to the terminal, by connecting the electrode assembly of the wound secondary battery in series and / or in parallel It can increase the mechanical adhesion of the electrode assemblies of the wound secondary battery, reduce the internal resistance to increase the electron transfer speed between the positive electrode and the negative electrode, and by connecting the large-sized wing-shaped electrode tab directly to the terminal,
- An integrated secondary battery can be provided that includes a reduced wound electrode assembly.
- the wound type secondary battery connected in series and / or parallel can be manufactured in one piece, which is easy to handle, the outer material is made of a light plastic material such as PP, PE, PVC or PET to reduce the weight of the secondary battery, Since the module manufacturing cost is lowered, there is industrial applicability.
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Abstract
The present invention relates to an integrated secondary battery characterized in that winding-type secondary battery electrode assemblies, which have large-area wing-type tabs, connected directly to a terminal in series and/or in parallel. The series and/or parallel connection of the electrode assemblies increases mechanical fastening force of the secondary battery electrode assemblies and reduces internal resistance, thereby increasing the movement speed of electrons between the positive and negative electrodes; and direct connection of the electrode tabs, which have been manufactured to have large areas, to the terminal decreases internal resistance of the electrode assemblies. In addition, the integrated secondary battery manufactured as such is advantageous in that series and/or parallel connection of unit electrode assemblies of the winding-type secondary battery increases energy density and electric capacity; the winding-type secondary battery connected in series and/or in parallel can be fabricated integrally, thereby making handling easy; and the exterior material is made of a light plastic material, thereby reducing the weight of the secondary battery and lowering the module manufacturing cost.
Description
본 발명은 전기화학적 충/방전 반응이 일어나는 권취형 이차전지 전극 조립체들이 내부적으로 직렬 및/또는 병렬로 연결됨으로써, 외형적으로는 3 ~ 48 V의 고출력, 고에너지를 갖는 일체형 이차전지에 관한 것이다.The present invention relates to an integrated secondary battery having a high output, high energy of 3 to 48 V by externally connected wound and secondary battery electrode assemblies in which an electrochemical charge / discharge reaction occurs in series and / or in parallel. .
최근 정보 통신 산업의 급격한 발전으로 인해 전자기기의 경량화 및 소형화가 급속도로 진행되고 있으며, 이로인해 높은 에너지 밀도를 갖는 전력원이 필수적으로 요구되고 있다. 또한, 환경오염에 대한 관심이 증가하면서 전기 자동차 및 하이브리드 전기 자동차의 개발이 급속도로 이루어지고 있어, 이들의 동력원으로 고에너지 밀도를 갖는 이차전지에 대한 연구가 활발히 진행되고 있다.Recently, due to the rapid development of the information and communication industry, the weight reduction and miniaturization of electronic devices are rapidly progressing, and thus, a power source having a high energy density is required. In addition, as interest in environmental pollution has increased, the development of electric vehicles and hybrid electric vehicles has been rapidly made, and researches on secondary batteries having high energy density as their power sources have been actively conducted.
이러한 고에너지 밀도를 갖는 전력원의 하나로 리튬 이차전지를 들 수 있는데, 상기 리튬 이차전지는 높은 에너지와 파워를 갖는 에너지 저장 장치이며, 다른 전지에 비해 용량이나 작동 전압이 높은 장점이 있다. One example of such a high energy density power source is a lithium secondary battery. The lithium secondary battery is an energy storage device having high energy and power, and has an advantage of higher capacity or operating voltage than other batteries.
상기 이차전지는 원통형, 각형, 파우치형 등의 다양한 형상으로 제조될 수 있으며, 상기 이차전지는 크게 전극 조립체가 원통형 또는 각형의 금속 캔에 내장되는 캔 타입과, 전극 조립체가 알루미늄 라미네이트 시트의 파우치형 케이스에 내장되는 파우치 타입으로 분류될 수 있다.The secondary battery may be manufactured in various shapes such as a cylindrical shape, a square shape, and a pouch type. The secondary battery may include a can type in which an electrode assembly is largely embedded in a cylindrical or rectangular metal can, and a pouch type electrode assembly in an aluminum laminate sheet. It may be classified into a pouch type embedded in a case.
일반적으로 이차전지는 이차전지 케이스와, 전해액과 함께 상기 이차전지 케이스에 수용되는 전극 조립체, 및 상기 이차전지 케이스의 상부에 밀봉 결합되는 캡 조립체를 포함한다.In general, the secondary battery includes a secondary battery case, an electrode assembly accommodated in the secondary battery case together with an electrolyte, and a cap assembly sealingly coupled to an upper portion of the secondary battery case.
상기 전극 조립체는 양극판, 세퍼레이터 및 음극판이 적층된 것으로서, 실질적으로 젤리-롤 형태의 권취된 구조를 가질 수 있는데, 상기 전극 조립체의 양극판과 음극판은 각각 알루미늄 호일과 구리 호일로 이루어진 집전체를 포함한다. 상기 양극판의 집전체와 음극판의 집전체에는 각각 양극 활물질과 음극 활물질이 도포되며, 상기 양극 활물질 또는 음극 활물질이 도포되지 않는 부분, 즉 무지부에는 전극탭이 연결된다. The electrode assembly is a laminate of a positive electrode plate, a separator, and a negative electrode plate, and may have a wound structure in a substantially jelly-roll form. The positive electrode plate and the negative electrode plate of the electrode assembly include a current collector made of aluminum foil and copper foil, respectively. . The positive electrode active material and the negative electrode active material are coated on the current collector of the positive electrode plate and the current collector of the negative electrode plate, respectively, and electrode tabs are connected to a portion where the positive electrode active material or the negative electrode active material is not applied, that is, the uncoated portion.
따라서, 상기 전극탭은 연결되는 극판의 종류에 따라 양극탭과 음극탭으로 구분될 수 있으며, 상기 양극탭과 음극탭 중 어느 하나는 전지케이스에 용접되고 나머지 다른 하나는 캡 조립체에 용접된다.Accordingly, the electrode tab may be divided into a positive electrode tab and a negative electrode tab according to the type of the electrode plate to be connected. One of the positive electrode tab and the negative electrode tab is welded to the battery case and the other is welded to the cap assembly.
이러한 기존의 이차전지에 사용되는 전극 조립체는, 동일 길이의 다수의 양극탭이 연결된 양극판과 동일 길이의 다수의 음극탭이 연결된 음극판 사이에 세퍼레이터가 삽입된 구조를 갖게 되는데, 필요에 따라 젤리-롤 형태로 권취된 구조를 가질 수 있다.The electrode assembly used in the conventional secondary battery has a structure in which a separator is inserted between a positive electrode plate connected with a plurality of positive electrode tabs of the same length and a negative electrode plate connected with a plurality of negative electrode tabs of the same length. It may have a structure wound in the form.
상기 권취된 구조의 전극 조립체의 경우, 상기 양극판에 부착된 양극탭들은 권취 중심으로부터 일렬로 상부 방향으로 배열되고, 상기 음극판에 부착된 음극탭들은 권취 중심으로부터 일렬로 하부 방향으로 배열되는 형태를 갖는 것이 일반적이다. 또한, 상부 방향으로 배열된 양극탭들은 양극 리이드와 결합되어 전지의 캡 조립체와 전기적으로 연결되고, 하부 방향으로 배열된 음극탭들은 음극 리이드와 결합되어 이차전지 케이스와 전기적으로 연결된다.In the case of the electrode assembly having the wound structure, the positive electrode tabs attached to the positive electrode plate are arranged in a row from the winding center in the upper direction, and the negative electrode tabs attached to the negative electrode plate are arranged in the lower direction in a row from the winding center. Is common. In addition, the positive electrode tabs arranged in the upper direction are electrically connected to the cap assembly of the battery by being combined with the positive electrode leads, and the negative electrode tabs arranged in the downward direction are electrically connected to the secondary battery case by being combined with the negative electrode leads.
하지만, 이와 같이 전기적으로 연결을 하기 위해서는 동일 길이의 다수의 양극탭들과 음극탭들이 일체로 각각 접합되고, 상기 전극탭들이 각각 양극 리이드 및 음극 리이드와 용접 등의 방법으로 외부와 일체형으로 연결되어야 하며, 상기 양극탭들 및 음극탭들을 각각 접합하는 과정과 이들을 용접 등으로 연결하는 과정이 어렵고, 까다로우며, 접합된 동일 길이의 다수의 양극탭들 및 음극탭들이 높은 저항값을 갖는다는 문제점이 존재한다.However, in order to electrically connect in this way, a plurality of positive and negative tabs having the same length are integrally joined to each other, and the electrode tabs are integrally connected to the outside by a method such as a positive lead, a negative lead, and welding, respectively. In addition, the process of joining the positive electrode tabs and the negative electrode tabs and the process of connecting them by welding, etc. are difficult, difficult, and a plurality of positive and negative tabs having the same length bonded to each other have a high resistance value. This exists.
종래의 기술로는, 복수개의 이차전지 디바이스들을 하나의 외부회로에 연결하기 위해 균일분배형 접속부재를 사용하는 방법(공개특허 제2008-0025431호) 및 다수의 전지셀을 적층하여 육면 적층체 구조로 제조된 전지팩(공개특허 제2013-0001970호)등이 있으나, 상기 이차전지 단위셀을 권취형으로 제작하여 기계적 밀착력을 높이면서도 내부저항을 감소시켜 양,음극의 전자이동 속도를 증가시키는 데에는 여전히 기술적 어려움이 존재한다. In the prior art, a method of using a uniformly distributed connection member to connect a plurality of secondary battery devices to one external circuit (Patent No. 2008-0025431) and a stack of a plurality of battery cells to build a hexahedral stack structure. Although there is a battery pack manufactured by Korean Patent Publication No. 2013-0001970, etc., the secondary battery unit cell may be manufactured in a wound type to increase the mechanical adhesion and decrease the internal resistance to increase the electron transfer speed of the positive and negative electrodes. There are still technical difficulties.
본 발명은 대면적 날개형 탭을 갖는 권취형 이차전지의 전극 조립체가 터미널에 직접 연결되는 것을 특징으로 하는 이차전지에 관한 것으로, 상기 권취형 이차전지의 전극 조립체를 직렬 및/또는 병렬로 연결함으로써 권취형 이차전지의 전극 조립체들의 기계적 밀착력을 높이고, 내부 저항을 감소시켜 양극과 음극 사이의 전자이동 속도를 증가시킬 수 있으며, 대면적으로 제작된 날개형 전극탭을 터미널에 직접 연결함으로써 내부 저항이 감소된 권취형 전극 조립체를 포함하는 일체형 이차전지를 제공하고자 한다. The present invention relates to a secondary battery, characterized in that the electrode assembly of the wound secondary battery having a large blade tab is directly connected to the terminal, by connecting the electrode assembly of the wound secondary battery in series and / or in parallel It can increase the mechanical adhesion of the electrode assemblies of the wound secondary battery, reduce the internal resistance to increase the electron transfer speed between the positive electrode and the negative electrode, and by connecting the large-sized wing-shaped electrode tab directly to the terminal, It is an object of the present invention to provide an integrated secondary battery including a reduced wound electrode assembly.
또한 격벽과 전지 케이스와 같은 외장재를 PP, PE , PVC 또는 PET와 같은 경량의 비전도성 플라스틱으로 제작함으로서, 일체형 이차전지의 무게를 줄이고, 모듈 제조 비용을 줄이고자 한다.In addition, by manufacturing the exterior materials such as the partition wall and the battery case made of lightweight non-conductive plastics such as PP, PE, PVC or PET, to reduce the weight of the integrated secondary battery, the module manufacturing cost.
상기 과제들을 해결하기 위하여, 본 발명은 양극, 세퍼레이터 및 음극이 적층된 전극 조립체를 제작함에 있어 날개형 대면적 탭을 가진 권취형 이차전지 전극 조립체를 터미널에 직접 연결하는 것을 특징으로 하는 이차전지를 제공한다In order to solve the above problems, the present invention provides a secondary battery, characterized in that directly connected to the wound secondary battery electrode assembly having a large blade tab of the positive electrode, the separator and the negative electrode in a terminal assembly to provide
본 발명의 권취형 이차전지 전극 조립체를 포함하는 일체형 이차전지는, 일면 또는 양면에 양극 활물질이 도포된 양극 집전체와 일면 또는 양면에 음극 활물질이 도포된 음극 집전체, 및 상기 양극 집전체와 음극 집전체 사이에 배치되는 세퍼레이터가 권취된 복수의 권취형 전극 조립체들을 포함하고, 상기 권취형 전극 조립체의 측면에 형성된 대면적 탭; 전지 케이스; 상기 권취형 전극 조립체들 사이를 분리하는 격벽; 권취형 전극 조립체들을 전기적으로 연결하는 터미널; 및 전해액을 포함하며, 상기 터미널이 격벽에 형성되고, 상기 권취형 전극 조립체들이 직렬 및/또는 병렬로 연결됨으로써, 상기 권취형 전극 조립체, 터미널이 형성된 격벽 및 외장재인 전지 케이스 사이의 공간을 최소화 시키고, 전기 저항을 감소시키는 것을 특징으로 한다.The integrated secondary battery including the wound secondary battery electrode assembly of the present invention includes a positive electrode current collector coated with a positive electrode active material on one or both sides, and a negative electrode current collector coated with a negative electrode active material on one or both surfaces thereof, and the positive electrode current collector and the negative electrode. A large area tab formed on a side of the wound electrode assembly, wherein the separator includes a plurality of wound electrode assemblies wound around a current collector; A battery case; Barrier ribs separating the wound electrode assemblies; A terminal for electrically connecting the wound electrode assemblies; And an electrolyte solution, wherein the terminals are formed in the barrier ribs, and the wound electrode assemblies are connected in series and / or in parallel, thereby minimizing a space between the wound electrode assembly, the barrier ribs on which the terminals are formed, and a battery case that is an outer material. It is characterized by reducing the electrical resistance.
본 발명에서의 상기 대면적 탭은, 양극 집전체 및 음극 집전체의 활물질이 도포되지 않은 말단 무지부에 형성되고, 권취형 전극 조립체의 가운데 부분 또는 상/하부 양끝 쪽에 형성되며, 상기 대면적 탭의 폭은 상기 권취형 전극 조립체의 높이의 10% 내지 80%의 범위인 것을 특징으로 한다.The large area tab of the present invention is formed on a terminal non-coated portion to which the active material of the positive electrode current collector and the negative electrode current collector is not coated, and is formed at the middle portion of the wound electrode assembly or at both upper and lower ends thereof, and the large area tab. The width of is characterized in that the range of 10% to 80% of the height of the wound electrode assembly.
또한, 본 방명의 상기 대면적 탭은 터미널에 직접 연결되는데, 용접, 솔더링, 전도성 화학물질의 접착 및 접속회로 볼팅 중 어느 하나 이상의 방법으로 직접 연결되는 것이 바람직하다. In addition, the large-area tab of the present invention is directly connected to the terminal, which is preferably directly connected by any one or more of welding, soldering, adhesion of conductive chemicals, and connection circuit bolting.
상기 격벽에는, 상기 권취형 전극 조립체와 연결된 대면적 탭의 위치에 대응되는 영역에 터미널이 형성되며, 폴리프필렌(PP), 폴리에틸렌(PE), 폴리비닐클로라이드(PVC) 및 폴리에틸렌테레프탈레이트(PET)로 이루어진 군에서 선택되는 적어도 하나 이상인 플라스틱 재질이며, 상기 격벽 외에도 전지 케이스 역시 동일한 경량의 플라스킥 재질이 사용될 수 있다.In the partition wall, a terminal is formed in an area corresponding to the position of the large area tab connected to the wound electrode assembly, and polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), and polyethylene terephthalate (PET) are formed. At least one plastic material selected from the group consisting of), in addition to the partition wall battery case may also be used the same lightweight plastic material.
본 발명의 일체형 이차전지는, 대면적 날개형 탭을 갖는 권취형 이차전지의 전극 조립체가 터미널에 직접 연결됨으로써, 기계적 밀착력이 높아지고 내부저항이 감소되어 양극과 음극 사이의 전자이동 속도를 증가시키는 효과가 있다. 또한, 대면적으로 제작된 날개형 대면적 탭을 터미널에 직접 연결함으로써, 상기 일체형 이차전지의 내부 저항을 감소시키는 효과가 있다. In the integrated secondary battery of the present invention, the electrode assembly of the wound secondary battery having a large-sized wing tab is directly connected to the terminal, thereby increasing mechanical adhesion and reducing internal resistance, thereby increasing the speed of electron transfer between the positive electrode and the negative electrode. There is. In addition, by directly connecting the large-size wing-shaped tab made of a large area, there is an effect of reducing the internal resistance of the integrated secondary battery.
전기화학적 충/방전이 이루어지는 권취형 이차전지의 전극 조립체를 직렬 및/또는 병렬로 연결함으로써 에너지 밀도와 전기 용량을 높일 수 있고, 권취형 전극 조립체, 터미널이 형성된 격벽 및 외장재(전지 케이스) 사이의 공간을 최소화함으로써 이차전지의 내부 저항을 감소시킬 수 있다. 그리고 직렬 및/또는 병렬로 연결된 권취형 이차전지가 일체형으로 제작될 수 있어 취급이 용이하며, 외장재가 PP, PE , PVC 또는 PET 등과 같은 가벼운 플라스틱 재질로 제조됨으로써 이차전지의 무게가 줄고, 모듈 제조 단가를 낮추는 장점이 있다.By connecting the electrode assemblies of the wound secondary battery in which the electrochemical charge / discharge is performed in series and / or in parallel, the energy density and the electric capacity can be increased, and between the wound electrode assembly, the barrier rib formed with the terminal, and the exterior material (battery case) By minimizing the space, the internal resistance of the secondary battery can be reduced. In addition, the wound type secondary battery connected in series and / or parallel can be manufactured in one piece, which is easy to handle, and the exterior material is made of a light plastic material such as PP, PE, PVC, or PET to reduce the weight of the secondary battery and manufacture the module. It has the advantage of lowering the unit price.
도 1은 본 발명의 날개형 대면적 탭을 가진 권취형 배터리를 탭을 형성하는 방법에 따라 두 가지 형태로 도시한 것이다.Figure 1 shows the wound battery having a large wing tab of the present invention in two forms according to the method of forming the tab.
도 2는 본 발명의 권취형 전극 조립체에 연결된 날개형 탭이, 격벽이 형성된 터미널과 결합되는 구조를 도식적으로 나타낸 것이다.Figure 2 schematically shows a structure in which a wing tab connected to the wound electrode assembly of the present invention is coupled to a terminal on which a partition is formed.
도 3은 본 발명의 직렬로 연결된 일체형 이차전지를 단면(a) 및 상부(b)에서 바라본 모습을 도시한 것이다.Figure 3 shows a cross-sectional view of the integrated secondary battery of the present invention in cross section (a) and top (b).
도 4는 본 발명의 직렬 및 병렬로 연결된 일체형 이차전지를 상부에서 바라본 모습을 도시한 것이다.Figure 4 shows a view from the top of the integrated secondary battery connected in series and parallel of the present invention.
본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니 되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙을 기초로 본 발명의 기술적 사상에 가장 부합하는 의미와 개념으로 해석되어야 한다.The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as a meaning and a concept that best fits the technical idea of the present invention based on the principle of the present invention.
본 명세서에 첨부되는 내용과 함께 기재된 도면들은, 본 발명의 바람직한 실시 형태를 예시하는 것이며, 기술되는 발명의 내용과 함께 본 발명의 기술사상을 더욱 이해시키는 역할을 하는 것이므로, 본 발명의 기술적 특징은 이러한 명세서의 기재와 도면만으로 한정되어 해석되어서는 아니 된다.BRIEF DESCRIPTION OF THE DRAWINGS The drawings described together with the contents appended hereto illustrate preferred embodiments of the present invention, and together with the contents of the described invention serve to further understand the technical spirit of the present invention, the technical features of the present invention It should not be construed as limited to the description and drawings of this specification.
이하에서는, 본 발명을 더욱 구체적으로 설명하고, 이해를 돕기 위해 바람직한 실시예를 통해 더욱 상세하게 설명한다.Hereinafter, the present invention will be described in more detail, and in more detail through preferred embodiments for better understanding.
도 1에는 본 발명의 날개형 대면적 탭을 갖는 권취형 전극 조립체에 형성된 날개형 대면적 탭이 형성된 구조의 예를 두 가지로 도시되어 있다. 상기 도 1을 참조하면, 본 발명의 날개형 대면적 탭을 가진 권취형 전극 조립체(100)는, 일면 또는 양면에 양극활물질이 도포된 양극집전체와 일면 또는 양면에 음극활물질이 도포된 음극집전체, 및 상기 양극집전체와 음극집전체 사이에 배치되는 세퍼레이터를 포함한다. 1 shows two examples of a structure in which a wing-type large area tab is formed in a wound electrode assembly having a wing-type large area tab of the present invention. Referring to FIG. 1, the wound electrode assembly 100 having the large wing-shaped tab of the present invention includes a cathode current collector coated with a cathode active material on one or both sides and an anode collector coated with an anode active material on one or both surfaces thereof. And a separator disposed between the positive electrode current collector and the negative electrode current collector.
상기 양극 집전체 및 음극 집전체의 (활물질이 도포되지 않은) 말단 무지부에 탭을 형성하는 방식에 따라 도 1과 같이 두 가지 형태로 나뉠 수 있다. The tabs may be divided into two types as shown in FIG. 1 according to a method of forming tabs on the terminal non-coated portions (without the active material) of the positive electrode current collector and the negative electrode current collector.
먼저, 도 1의 (a)와 같이, 상기 양극 및 음극 집전체에 형성된 말단 무지부의 양끝을 일정한 길이로 잘라낸 후 절단 부위를 실링(sealing)하여 전극 집전체의 가운데 부분에 대면적 탭(201,202)을 형성할 수 있다. 또한, 도 1의 (b)와 같이 전극 집전체의 무지부 가운데 부분과 위 아래 양끝 쪽의 말단 무지부를 잘라낸 후 절단 부위를 실링(sealing)하여 전극 집전체의 상/하부 양끝 쪽에 대면적 탭(201a,201b,202a,202b)을 형성할 수 있다. First, as shown in (a) of FIG. 1, both ends of the end plain portions formed in the positive and negative electrode current collectors are cut to a predetermined length, and then the cut portions are sealed to seal the large area tabs 201 and 202 at the center of the electrode current collector. Can be formed. In addition, as shown in (b) of FIG. 1, the middle portion of the non-coating portion of the electrode current collector and the terminal solid portions at both ends of the upper and lower ends are cut out, and the cut portions are sealed to seal the large area tabs at both upper and lower ends of the electrode current collector. 201a, 201b, 202a, and 202b may be formed.
상기 양극집전체와 음극집전체 사이에는 전기적으로 절연되도록 세퍼레이터들이 배치되는데, 예를 들면 음극집전체 위에 세퍼레이터를 결합한 후, 극판과 세퍼레이터가 평행하게 유지되도록 롤링을 시작하는데, 롤링이 시작된 세퍼레이터 위에 양극집전체와 세퍼레이터를 순차적으로 결합하여 함께 롤링 공정을 진행한다.Separators are disposed between the cathode current collector and the anode current collector so as to be electrically insulated. For example, after the separators are coupled to the anode current collector, rolling is started to keep the electrode plates and the separators in parallel. The current collector and the separator are sequentially combined to roll together.
상기 양극 집전체상에 도포되는 활물질인, 양극 활물질은 리튬 코발트 산화물(LiCoO2), 리튬 니켈 산화물(LiNiO2), Li[NixCoyMnzMv]O2(상기 식에서, M은 Al, Ga 및 In으로 이루어진 군에서 선택되는 어느 하나 또는 이들 중 2종 이상의 원소이고(여기서, 0.3≤x<1.0, 0≤y, z≤0.5, 0≤v≤0.1, x+y+z+v=1임), Li(LiaMb-a-b'M'b')O2
-cAc(이때, 0≤a≤0.2, 0.6≤b≤1, 0≤b'≤0.2, 0≤c≤0.2이고, M은 Mn, Ni, Co, Fe, Cr, V, Cu, Zn 및 Ti로 이루어진 군에서 선택되는 1종 이상을 포함하며, M'는 Al, Mg 및 B로 이루어진 군에서 선택되는 1종 이상이고, A는 P, F, S 및 N로 이루어진 군에서 선택되는 1종 이상임)등의 층상 화합물 또는 하나 이상의 전이금속으로 치환된 층상화합물; Li1
+
yMn2
-
yO4 (0≤y≤0.2), LiMnO3, LiMn2O3, LiMnO2 등의 리튬 망간 산화물; 리튬 동 산화물(Li2CuO2); LiV3O8, LiFe3O4, V2O5, Cu2V2O7 등의 바나듐 산화물; 화학식 LiNi1
-
yMyO2 (여기서, M = Co, Mn, Al, Cu, Fe, Mg, B 또는 Ga 이고, 0.01≤y≤0.3)으로 표현되는 Ni 사이트형 리튬 니켈 산화물; 화학식 LiMn2
-yMyO2 (여기서, M은 Co, Ni, Fe, Cr, Zn 또는 Ta 이고, 0.01≤y≤0.1) 또는 Li2Mn3MO8 (여기서, M은 Fe, Co, Ni, Cu 또는 Zn 임)으로 표현되는 리튬 망간 복합 산화물; 화학식의 Li 일부가 알칼리토금속 이온으로 치환된 LiMn2O4; 디설파이드 화합물; Fe2(MoO4)3 등을 들 수 있지만, 반드시 이들만으로 한정되는 것은 아니다. The positive electrode active material, which is an active material applied on the positive electrode current collector, may include lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ), Li [Ni x Co y Mn z Mv] O 2 (wherein M is Al, Any one selected from the group consisting of Ga and In, or two or more elements thereof (where 0.3≤x <1.0, 0≤y, z≤0.5, 0≤v≤0.1, and x + y + z + v = 1), Li (Li a M ba-b ' M' b ' ) O 2 -c A c (where 0≤a≤0.2, 0.6≤b≤1, 0≤b'≤0.2, 0≤c≤ 0.2, M is one or more selected from the group consisting of Mn, Ni, Co, Fe, Cr, V, Cu, Zn and Ti, M 'is 1 selected from the group consisting of Al, Mg and B At least one species, A is at least one selected from the group consisting of P, F, S and N) or a layered compound substituted with at least one transition metal; Li 1 + y Mn 2 - y O 4 (0 ≤ y ≤ 0.2), lithium manganese oxides such as LiMnO 3 , LiMn 2 O 3 , LiMnO 2 , lithium copper oxide (Li 2 CuO 2 ); LiV 3 O 8 , LiFe 3 O 4 , V 2 O 5, Cu 2 V 2 O 7 , such as a vanadium oxide; formula LiNi 1 - y M y O 2 ( where, M = Co, Mn, Al , Cu, Fe, and Mg, B or Ga, 0.01≤y≤ Ni-site-type lithium nickel oxide represented by 0.3; LiMn 2 -y M y O 2 (wherein M is Co, Ni, Fe, Cr, Zn or Ta, 0.01 ≦ y ≦ 0.1) or Li 2 Mn 3 Lithium manganese composite oxides represented by MO 8 , wherein M is Fe, Co, Ni, Cu, or Zn; LiMn 2 O 4 in which a portion of Li in the formula is substituted with alkaline earth metal ions; disulfide compounds; Fe 2 (MoO 4 ) 3 and the like, but are not necessarily limited to these.
또한 상기 음극 집전체상에 도포되는 활물질인, 음극활물질은 리튬 이온을 가역적으로 인터칼레이션/디인터칼레이션할 수 있는 물질, 리튬 금속, 리튬 금속의 합금, 리튬에 도프 및 탈도프 가능한 물질 또는 전이 금속 산화물을 포함한다.In addition, the negative electrode active material, which is an active material applied on the negative electrode current collector, is a material capable of reversibly intercalating / deintercalating lithium ions, a lithium metal, an alloy of lithium metal, a material that can be doped and undoped with lithium, or Transition metal oxides.
상기 리튬 이온을 가역적으로 인터칼레이션/디인터칼레이션할 수 있는 물질로는 탄소 물질로서, 리튬 이온 이차전지에서 일반적으로 사용되는 탄소계 음극활물질은 어떠한 것도 사용 가능하며, 대표적인 예로는 결정질 탄소, 비정질 탄소 또는 이들을 함께 사용할 수 있다. 또한, 상기 결정질 탄소의 예로는 무정형, 탄상, 린편상, 구형 또는 섬유형의 천연 흑연 또는 인조 흑연과 같은 흑연을 들 수 있고, 상기 비정질 탄소의 예로는 소프트 카본 또는 하드카본, 메조페이스 핏치 탄화물, 소성된 코크스 등을 들 수 있다.As a material capable of reversibly intercalating / deintercalating the lithium ions, any carbon-based negative electrode active material generally used in a lithium ion secondary battery may be used. Representative examples include crystalline carbon, Amorphous carbons or these may be used together. Examples of the crystalline carbon may include graphite such as amorphous, carbon, lean, spherical or fibrous natural graphite or artificial graphite. Examples of the amorphous carbon may include soft carbon or hard carbon, mesophase pitch carbide, Calcined coke, and the like.
그리고 상기 리튬 금속의 합금으로는, 리튬과 Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al 및 Sn으로 이루어진 군에서 선택되는 금속의 합금이 사용될 수 있으며, 상기 리튬에 도프 및 탈도프 가능한 물질로는 Si, SiOx(0<x<2), Si-Q 합금(상기 Q는 알칼리 금속, 알칼리 토금속, 13족 원소, 14족 원소, 전이금속, 희토류 금속 및 이들의 조합으로 이루어진 군에서 선택되는 원소이며, Si은 아님), Sn, SnO2, Sn-R(상기 R은 알칼리 금속, 알칼리 토금속, 13족 원소, 14족 원소, 전이금속, 희토류 원소 및 이들의 조합으로 이루어진 군에서 선택되는 원소이며, Sn은 아님)등을 들 수 있는데, 이들 중 적어도 하나와 SiO2를 혼합하여 사용할 수도 있다. And as the alloy of the lithium metal, lithium and Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al and Sn An alloy of a metal selected from the group may be used. Examples of the material doped and undoped with lithium include Si, SiO x (0 <x <2), and Si-Q alloys (where Q is an alkali metal, an alkaline earth metal, and 13). An element selected from the group consisting of group elements, group 14 elements, transition metals, rare earth metals, and combinations thereof, not Si), Sn, SnO 2 , Sn-R (wherein R is an alkali metal, an alkaline earth metal, and a group 13) An element selected from the group consisting of an element, a Group 14 element, a transition metal, a rare earth element, and a combination thereof, and not Sn), and at least one of them and SiO 2 may be mixed and used.
상기 원소 Q 및 R는 Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Ti, Ge, P, As, Sb, Bi, S, Se, Te, Po, 및 이들의 조합으로 이루어진 군에서 선택될 수 있으며, 필요에 따라 이들 중 적어도 하나와 SiO2를 혼합하여 사용할 수도 있다.The elements Q and R are Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Ti, Ge, P, As, Sb, Bi, It may be selected from the group consisting of S, Se, Te, Po, and combinations thereof, and may be used by mixing SiO 2 with at least one of them, if necessary.
상기 전이 금속 산화물로는 바나듐 산화물, 리튬 바나듐 산화물 등이 있으며, 결정성 탄소로는 메조페이스(mesophase) 구형 입자로부터 탄화단계(carbonizing step) 및 흑연화 단계를 거쳐 제조된 탄소 물질 또는 섬유형 메조페이스 핏치(mesophase pitch fiber)로부터 탄화 단계 및 흑연화 단계를 거쳐 제조된 섬유형 흑연(graphite fiber)이 바람직하다.The transition metal oxide may include vanadium oxide, lithium vanadium oxide, and the like, and the crystalline carbon may be a carbonaceous or fibrous mesophase prepared from mesophase spherical particles through a carbonizing step and a graphitization step. Preference is given to graphite fibers prepared through a carbonization step and a graphitization step from pitch (mesophase pitch fiber).
본 발명에서 사용되는 세퍼레이터는, 종래 세퍼레이터로 사용되는 통상적인 다공성 고분자 필름인 에틸렌 단독중합체, 프로필렌 단독중합체, 에틸렌/부텐 공중합체, 에틸렌/헥센 공중합체 및 에틸렌/메타크릴레이트 공중합체 등과 같은 폴리올레핀계 고분자로 제조한 다공성 고분자 필름을 단독 또는 적층하여 사용할 수 있는데, 고융점의 유리 섬유, 폴리에틸렌테레프탈레이트 섬유 등의 재질의 부직포인 다공성 부직포 또는 상기 폴리머 세퍼레이터 기재의 적어도 한 면에 세라믹을 코팅하여 사용할 수 있으며, 반드시 이러한 것으로만 제한되는 것은 아니다.The separator used in the present invention is a polyolefin type such as ethylene homopolymer, propylene homopolymer, ethylene / butene copolymer, ethylene / hexene copolymer and ethylene / methacrylate copolymer, which are conventional porous polymer films used as conventional separators. A porous polymer film made of a polymer may be used alone or laminated, and may be used by coating a ceramic on at least one surface of a porous nonwoven fabric or a non-woven fabric made of a material such as high melting point glass fiber, polyethylene terephthalate fiber, or the like based on the polymer separator. It is not necessarily limited to this.
본 발명의 전극 조립체에 사용되는 양극 집전체 및 음극 집전체는 각각 전도성이 높은 금속으로, 상기 활물질이 용이하게 도포될 수 있으면서도 전지의 전압 범위에서 반응성이 없는 금속이면 어느 것이라도 사용될 수 있다. 대표적인 예를 들면 알루미늄, 구리, 금, 니켈, 또는 이들의 합금, 또는 이들의 조합에 의해서 제조되는 스트립 형상의 박판 등이 있으며, 바람직하게는 양극 집전체로 알루미늄박판과 음극 집전체로 구리박판이 사용된다.The positive electrode current collector and the negative electrode current collector used in the electrode assembly of the present invention are metals having high conductivity, and any metal may be used as long as the active material can be easily applied and is not reactive in the voltage range of the battery. Representative examples include strip-shaped thin plates manufactured by aluminum, copper, gold, nickel, or alloys thereof, or a combination thereof. Preferably, a thin aluminum plate is used as the positive electrode current collector and a copper thin plate is used as the negative electrode current collector. Used.
본 발명의 전극 조립체에 형성되는 양극탭(202) 및 음극탭(201)은, 기존 전극 조립체의 상/하부에 형성되는 것과는 달리, 전극 조립체의 측면에 대면적으로 형성됨으로써 터미널과의 연결이 용이하고, 터미널과 대면적으로 연결됨으로써 내부 저항이 현저하게 감소된다.The positive electrode tab 202 and the negative electrode tab 201 formed in the electrode assembly of the present invention, unlike the upper and lower portions of the existing electrode assembly, is formed in a large area on the side of the electrode assembly to facilitate connection with the terminal. In addition, by connecting the terminal in a large area, the internal resistance is significantly reduced.
도 2에 제시된 바와 같이, 본 발명에서 형성되는 대면적 탭(200)의 폭(즉, 길이)은 전극 조립체의 높이(또는 세로 길이)의 10% 내지 80%의 범위인 것이 바람직한데, 형성된 양극탭 및 음극탭의 폭(즉, 길이)가 전극 조립체의 높이(또는 세로 길이)의 10% 이하의 경우 터미널과의 용접을 통한 연결이 어려워지고, 터미널(300)과의 연결 부위가 작아져 내부 저항이 증가되며, 단락의 위험성 있다. 또한, 형성된 양극탭 및 음극탭의 폭(즉, 길이)이 전극 조립체의 높이(또는 세로 길이)의 80% 이상의 경우에는, 터미널과의 용접을 통한 연결이 쉬워질 수 있으나, 전극 조립체 내부의 기계적 밀착력이 감소하여 오히려 내부 저항이 증가하고, 양극과 음극 사이의 전극간의 전자이동속도가 느려지는 문제점이 발생한다.As shown in FIG. 2, the width (ie, length) of the large-area tab 200 formed in the present invention is preferably in the range of 10% to 80% of the height (or length) of the electrode assembly. If the width (ie, length) of the tab and the negative electrode tab is less than 10% of the height (or length) of the electrode assembly, the connection with the terminal becomes difficult, and the connection with the terminal 300 becomes small, so that The resistance is increased and there is a risk of short circuit. In addition, when the widths (ie, lengths) of the formed positive and negative electrode tabs are 80% or more of the height (or vertical length) of the electrode assembly, the connection through the welding with the terminal may be easy, As the adhesion decreases, the internal resistance increases, and the electron transfer speed between the electrodes between the anode and the cathode decreases.
도 3에는 본 발명의 권취형 이차전지 전극 조립체가 터미널을 통해 직렬로 연결된 일체형 이차전지가 도시되어 있으며, 이를 상부에서 관찰한 모습을 도식적으로 제시되어 있다. 이렇게 직렬로 연결된 일체형 이차전지는, 사각형의 전지케이스(10), 대면적 탭을 포함하는 권취형 (이차전지) 전극 조립체(100), 상기 권취형 전극 조립체들 사이를 분리하는 플라스틱 격벽(400), 전지케이스와 권취형 이차전지 전극 조립체들을 전기적으로 연결하는 터미널(300), 및 전해액(미도시)을 포함하며, n개의 권취형 이차전지 전극 조립체들이 직렬로 연결될 경우에는 이로부터 제조되는 일체형 이차전지의 최종 전압은 개별 권취형 이차전지 전극 조립체의 전기화학적 전압의 n배가 된다.3 shows an integrated secondary battery in which a wound secondary battery electrode assembly of the present invention is connected in series through a terminal, and is shown schematically from the top. The integrated secondary battery connected in series is a rectangular battery case 10, a wound (secondary battery) electrode assembly 100 including a large area tab, and a plastic partition 400 separating the wound electrode assemblies. , A terminal 300 electrically connecting the battery case and the wound secondary battery electrode assemblies, and an electrolyte (not shown), and when the n wound secondary battery electrode assemblies are connected in series, an integral secondary fabricated therefrom. The final voltage of the cell is n times the electrochemical voltage of the individual wound secondary battery electrode assembly.
상기 도 3에서 확인될 수 있듯이, 본 발명의 일체형 이차전지는 직렬로 연결된 2개 이상의 권취형 전극 조립체들과 상기의 권취형 전극 조립체들을의 대면적 탭들을 전기적으로 연결하는 터미널 및 상기 터미널이 포함된 영역을 제외하고는 권취형 전극 조립체들을 전기적 및 물리적으로 분리하는 격벽을 포함한다. As can be seen in FIG. 3, the integrated secondary battery of the present invention includes two or more wound electrode assemblies connected in series and a terminal electrically connecting the large area tabs of the wound electrode assemblies. Except for the enclosed area, a partition wall electrically and physically separates the wound electrode assemblies.
본 실시예에서는 편의상 도 1의 (a)와 같이 대면적 탭이 전극 집전체의 가운데에 형성된 경우에 대해서 권취형 전극 조립체가 직렬 연결되어 형성된 일체형 이차전지를 제시하고 있지만, 도 1(b)와 같이 대면적 탭이 상/하부에 형성된 경우에도, 이 기술분야에서 통상의 지식을 갖는 기술자라면 터미널의 위치와 모양을 조절함으로써, 동일하게 권취형 전극 조립체를 직렬 연결하여 일체형 이차전지를 형성할 수 있을 것이다.In the present embodiment, for convenience, as shown in FIG. 1A, the wound type electrode assembly is formed in series with respect to the case in which the large area tab is formed in the center of the electrode current collector. Even when the large-area tab is formed at the upper and lower portions, a person skilled in the art can adjust the position and shape of the terminal to form a unitary secondary battery by connecting the wound electrode assemblies in series. There will be.
상기의 격벽(400)은 이차전지 무게를 줄이고, 전기적 절연을 위해 플라스틱 재질이 바람직하며, PP, PE, PVC 및 PET 중 적어도 어느 하나 이상을 사용할 수 있다. 또한, 상기 격벽의 일부에는, 바람직하게는 상기 권취형 전극 조립체가 갖는 대면적 탭의 위치에 대응되는 영역에는 전기적으로 연결되는 터미널이 형성되는데, 상기 격벽에 위치되는 터미널의 크기는 권취형 전극 조립체에 형성된 대면적 탭의 크기에 비해 동일한 크기를 갖거나 큰 것이 바람직하다.The partition 400 is preferably a plastic material for reducing the weight of the secondary battery and for electrical insulation, and may use at least one of PP, PE, PVC, and PET. In addition, a portion of the barrier rib, preferably formed in the region corresponding to the position of the large-area tab of the wound electrode assembly is electrically connected terminal, the size of the terminal located on the barrier rib electrode assembly It is desirable to have the same size or larger than the size of the large area tab formed in the.
상기 터미널(300)은, 특별히 제한되지 아니하며, 이차전지 기술분야에서 통상적으로 사용되는 전기 전도성이 높은 물질이라면 어느 것이라도 사용될 수 있으며, 상기 터미널은 각각 양극 집전체와 음극 집전체 말단 무지부에 형성된 양극 (대면적) 탭과 음극 (대면적)탭에 용접 등의 방법에 의해 부착될 수 있다. 또한, 상기 터미널과 대면적 탭과의 연결 방식은 상기 용접 방법 외에도, 솔더링, 전도성 화학물질의 접착, 접속회로 볼팅 등의 직접 연결 방법이 사용될 수 있다.The terminal 300 is not particularly limited, and any terminal may be used as long as it is a material having high electrical conductivity, which is commonly used in the secondary battery art, and the terminals may be formed at the end of the positive and negative electrode current collectors, respectively. It can be attached to the positive electrode (large area) tab and the negative electrode (large area) tab by a method such as welding. In addition, the connection method between the terminal and the large-area tab may be a direct connection method such as soldering, adhesion of conductive chemicals, connection circuit bolting, etc., in addition to the welding method.
이렇게 직렬로 연결된 권취형 전극 조립체를 플라스틱 등의 가벼운 재질로 제작한 사각의 케이스에 부착하고 전해액을 함침시킨 후, 밀봉단계를 거치면 본 발명의 직렬로 연결된 일체형 이차전지가 제조된다.The wound electrode assemblies connected in series are attached to a rectangular case made of a light material such as plastic, and impregnated with an electrolyte, followed by a sealing step, thereby manufacturing an integrated secondary battery connected in series.
이렇게 제조된 본 발명의 일체형 이차전지는 기존의 이차전지에 비해 양,음극탭과 터미널 간의 용접이 용이하고, 전극 조립체를 직렬의 일체형으로 조립함으로써, 전극 조립체들 사이의 기계적 밀착력을 높이고 내부저항을 감소시켜 양.음극간의 전자이동 속도를 증가시키는 효과가 있다.Thus, the integrated secondary battery of the present invention is easier to weld between the positive and negative electrode tabs and the terminal as compared to the conventional secondary battery, and by assembling the electrode assembly in a series of integrated, to increase the mechanical adhesion between the electrode assemblies and increase the internal resistance It is effective in increasing the electron transfer speed between the positive and negative electrodes.
본 발명의 또 다른 실시형태로, 도 4와 같이 직렬로 연결된 권취형 전극 조립체들을 추가적으로 병렬 연결시킬 수 있는데, 에너지 밀도의 향상과 함께 높은 전기 저장 용량을 실현할 수 있다. 도 3에 제시된 직렬 연결된 전극 조립체를 복수개 준비하고, 이들을 전기적으로 연결하는 터미널들이 전기적으로 병렬 연결되도록 함으로써, 에너지 밀도와 전기 저장 용량을 동시에 높일 수 있는 일체형 이차전지를 제조할 수 있다. In another embodiment of the present invention, it is possible to additionally connect the wound electrode assemblies connected in series as shown in FIG. 4 to realize a high electric storage capacity with an improvement in energy density. By preparing a plurality of series connected electrode assembly shown in Figure 3, and the terminals electrically connecting them to be connected in parallel, it is possible to manufacture an integrated secondary battery that can increase the energy density and electrical storage capacity at the same time.
이렇게 권취형 전극 조립체들을 직렬 및 병렬로 연결함으로써 에너지 밀도와 전기 저장 용량을 높일 수 있을 뿐만 이나라, 권취형 전극 조립체, 터미널이 부착된 내벽, 외장재 사이의 공간을 최소화시킴으로써 내부 저항을 최소화 할 수 있으며, 직렬 및 병렬로 연결된 권취형 전극 조립체를 외형적으로는 일체형으로 제작할 수 있어 취급이 용이하고, 외장재를 플라스틱 등의 가벼운 물질로 제작함으로서 배터리 무게를 감소시키고 모듈 제조 단가를 절감시키는 장점이 있다. 또한, 필요에 따라 상기 권취형 전극 조립체들을 병렬로만 연결함으로써 대용량의 이차전지 모듈에 사용될 수 있다.By connecting the wound electrode assemblies in series and in parallel, energy density and electrical storage capacity can be increased, and internal resistance can be minimized by minimizing the space between the wound electrode assembly, the inner wall to which the terminal is attached, and the exterior material. In addition, since the wound electrode assembly connected in series and in parallel can be manufactured in an integral form, it is easy to handle, and the exterior material is made of a light material such as plastic, thereby reducing battery weight and reducing module manufacturing cost. In addition, if necessary, the wound electrode assemblies may be used in a large capacity secondary battery module by only connecting the wound electrode assemblies in parallel.
본 발명에 따른 일체형 이차전지는 다수의 이차전지 셀들을 포함하는 중대형 전지모듈에 바람직하고도 효과적으로 사용될 수 있으며, 상기 중대형 전지모듈은 전기자동차(EV), 하이브리드 전기자동차(HEV), 플러그-인 하이브리드 전기자동차, 전력 저장용 시스템 등에 사용될 수 있다. The integrated secondary battery according to the present invention can be preferably and effectively used in a medium-large battery module including a plurality of secondary battery cells, the medium-large battery module is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid It can be used in electric vehicles, power storage systems and the like.
이상과 같이 본 발명은 도면에 도시된 실시 형태를 중심으로 설명되었으나, 이는 예시적인 것에 불과한 것이므로 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형되어 실시하는 것이 가능하고, 이들 역시 본 발명의 범위에 속한다.As described above, the present invention has been described with reference to the embodiments illustrated in the drawings, but the present invention is not limited thereto, and the present invention is not limited thereto, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible to do so, and these also belong to the scope of the present invention.
본 발명은 대면적 날개형 탭을 갖는 권취형 이차전지의 전극 조립체가 터미널에 직접 연결되는 것을 특징으로 하는 이차전지에 관한 것으로, 상기 권취형 이차전지의 전극 조립체를 직렬 및/또는 병렬로 연결함으로써 권취형 이차전지의 전극 조립체들의 기계적 밀착력을 높이고, 내부 저항을 감소시켜 양극과 음극 사이의 전자이동 속도를 증가시킬 수 있으며, 대면적으로 제작된 날개형 전극탭을 터미널에 직접 연결함으로써 내부 저항이 감소된 권취형 전극 조립체를 포함하는 일체형 이차전지를 제공할 수 있다. 또한, 직렬 및/또는 병렬로 연결된 권취형 이차전지가 일체형으로 제작될 수 있어 취급이 용이하며, 외장재가 PP, PE , PVC 또는 PET 등과 같은 가벼운 플라스틱 재질로 제조됨으로써 이차전지의 무게가 감소하고, 모듈 제조 단가가 낮아지는 장점이 있으므로, 산업상 이용가능성이 있다.The present invention relates to a secondary battery, characterized in that the electrode assembly of the wound secondary battery having a large blade tab is directly connected to the terminal, by connecting the electrode assembly of the wound secondary battery in series and / or in parallel It can increase the mechanical adhesion of the electrode assemblies of the wound secondary battery, reduce the internal resistance to increase the electron transfer speed between the positive electrode and the negative electrode, and by connecting the large-sized wing-shaped electrode tab directly to the terminal, An integrated secondary battery can be provided that includes a reduced wound electrode assembly. In addition, the wound type secondary battery connected in series and / or parallel can be manufactured in one piece, which is easy to handle, the outer material is made of a light plastic material such as PP, PE, PVC or PET to reduce the weight of the secondary battery, Since the module manufacturing cost is lowered, there is industrial applicability.
Claims (8)
- 권취형 이차전지 전극 조립체를 포함하는 일체형 이차전지에 있어서, In the integrated secondary battery comprising a wound secondary battery electrode assembly,일면 또는 양면에 양극 활물질이 도포된 양극 집전체와 일면 또는 양면에 음극 활물질이 도포된 음극 집전체, 및 상기 양극 집전체와 음극 집전체 사이에 배치되는 세퍼레이터가 권취된 복수의 권취형 전극 조립체들을 포함하고, A plurality of wound electrode assemblies in which a positive electrode current collector coated with a positive electrode active material on one or both surfaces, a negative electrode current collector coated with a negative electrode active material on one or both surfaces, and a separator disposed between the positive electrode current collector and the negative electrode current collector are wound Including,상기 권취형 전극 조립체의 측면에 형성된 대면적 탭; 전지 케이스; 상기 권취형 전극 조립체들 사이를 분리하는 격벽; 권취형 전극 조립체들을 전기적으로 연결하는 터미널; 및 전해액을 포함하며, A large area tab formed on a side of the wound electrode assembly; A battery case; Barrier ribs separating the wound electrode assemblies; A terminal for electrically connecting the wound electrode assemblies; And an electrolyte solution,상기 터미널이 격벽에 형성되어, 상기 권취형 전극 조립체들이 직렬 및/또는 병렬로 연결됨으로써, 상기 권취형 전극 조립체, 터미널이 형성된 격벽 및 외장재인 전지 케이스 사이의 공간을 최소화되고, 전기 저항이 감소되는 것을 특징으로 하는 일체형 이차전지.The terminal is formed in the partition wall, so that the wound electrode assemblies are connected in series and / or in parallel, thereby minimizing a space between the wound electrode assembly, the partition wall where the terminal is formed and the battery case, which is an exterior material, and reducing electrical resistance. Integrated secondary battery, characterized in that.
- 제1항에 있어서, The method of claim 1,상기 대면적 탭은, The large area tab,양극 집전체 및 음극 집전체의 활물질이 도포되지 않은 말단 무지부에 형성되고, 권취형 전극 조립체의 가운데 부분 또는 상/하부 양끝 쪽에 형성되는 것을 특징으로 하는 일체형 이차전지. An integrated secondary battery, which is formed on a terminal non-coated portion to which an active material of a positive electrode current collector and a negative electrode current collector is not coated, and is formed at the center portion of the wound electrode assembly or at both ends of upper and lower portions thereof.
- 제1항에 있어서, The method of claim 1,상기 대면적 탭의 폭은, 상기 권취형 전극 조립체의 높이의 10% 내지 80%의 범위인 것을 특징으로 하는 일체형 이차전지.The width of the large-area tab, the integral secondary battery, characterized in that the range of 10% to 80% of the height of the wound electrode assembly.
- 제1항에 있어서, The method of claim 1,상기 대면적 탭이 터미널에 직접 연결되는 것을 특징으로 하는 일체형 이차전지.The secondary battery of claim 1, wherein the large area tab is directly connected to the terminal.
- 제4항에 있어서, The method of claim 4, wherein상기 대면적 탭은, 용접, 솔더링, 전도성 화학물질의 접착 및 접속회로 볼팅 중 어느 하나 이상의 방법으로 직접 연결되는 것을 특징으로 하는 일체형 이차전지.The large-area tab is an integrated secondary battery, characterized in that directly connected by any one or more methods of welding, soldering, adhesion of conductive chemicals and connection circuit bolting.
- 제1항에 있어서, The method of claim 1,상기 격벽에는, 상기 권취형 전극 조립체와 연결된 대면적 탭의 위치에 대응되는 영역에 터미널이 형성되는 것을 특징으로 하는 일체형 이차전지.The partition wall, the unitary secondary battery, characterized in that the terminal is formed in the region corresponding to the position of the large-area tab connected to the wound electrode assembly.
- 제1항에 있어서, The method of claim 1,상기 격벽과 전지 케이스는, 플라스틱 재질인 것을 특징으로 하는 일체형 이차전지. The partition wall and the battery case, an integral secondary battery, characterized in that the plastic material.
- 제7항에 있어서, The method of claim 7, wherein상기 플라스틱 재질은 폴리프필렌(PP), 폴리에틸렌(PE), 폴리비닐클로라이드(PVC) 및 폴리에틸렌테레프탈레이트(PET)로 이루어진 군에서 선택되는 적어도 하나 이상인 것을 특징으로 하는 일체형 이차전지.The plastic material is at least one selected from the group consisting of polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC) and polyethylene terephthalate (PET) secondary battery.
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| KR1020130166937A KR101526513B1 (en) | 2013-12-30 | 2013-12-30 | Integrated All-in-one Rechargeble Battery with Jelly-Roll Assembly Connected Serially or Parallely |
| KR10-2013-0166937 | 2013-12-30 |
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| KR102113323B1 (en) * | 2017-01-26 | 2020-05-21 | 주식회사 엘지화학 | Lithium ion secondary battery |
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|---|---|---|---|---|
| JP2002313289A (en) * | 2001-02-08 | 2002-10-25 | Denso Corp | Battery |
| KR20110047120A (en) * | 2009-10-29 | 2011-05-06 | 삼성에스디아이 주식회사 | Rechargeable battery |
| KR20120090027A (en) * | 2009-09-18 | 2012-08-16 | 파나소닉 주식회사 | Battery module |
| JP2013065568A (en) * | 2004-12-22 | 2013-04-11 | Sk Innovation Co Ltd | High power lithium unit cell and high power lithium battery pack having the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313289A (en) * | 2001-02-08 | 2002-10-25 | Denso Corp | Battery |
| JP2013065568A (en) * | 2004-12-22 | 2013-04-11 | Sk Innovation Co Ltd | High power lithium unit cell and high power lithium battery pack having the same |
| KR20120090027A (en) * | 2009-09-18 | 2012-08-16 | 파나소닉 주식회사 | Battery module |
| KR20110047120A (en) * | 2009-10-29 | 2011-05-06 | 삼성에스디아이 주식회사 | Rechargeable battery |
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