WO2018128283A1 - 내부의 온도를 측정할 수 있는 전지셀 - Google Patents
내부의 온도를 측정할 수 있는 전지셀 Download PDFInfo
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- WO2018128283A1 WO2018128283A1 PCT/KR2017/014296 KR2017014296W WO2018128283A1 WO 2018128283 A1 WO2018128283 A1 WO 2018128283A1 KR 2017014296 W KR2017014296 W KR 2017014296W WO 2018128283 A1 WO2018128283 A1 WO 2018128283A1
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M10/04—Construction or manufacture in general
- H01M10/045—Cells or batteries with folded plate-like electrodes
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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
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
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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
- 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
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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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
- 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
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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
- 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
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
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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
- 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
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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
- 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
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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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
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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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
- H01M2200/00—Safety devices for primary or secondary batteries
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- 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
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- 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 a battery cell capable of measuring the internal temperature.
- a secondary battery means a battery that can be charged and discharged, unlike a primary battery that cannot be charged, and is widely used in electronic devices such as mobile phones, camcorders, laptops, and electric vehicles.
- a lithium secondary battery is a power source for electronic equipment. It has a capacity more than three times that of a commonly used nickel cadmium battery or a nickel hydride battery, and because of its excellent energy density per unit weight, the degree of utilization is rapidly increasing.
- the secondary battery may be classified into a lithium ion battery using a liquid electrolyte and a lithium ion polymer battery using a polymer solid electrolyte according to the type of electrolyte.
- the electrode assembly may be formed into a cylindrical or rectangular metal can.
- the built-in cylindrical and rectangular batteries and the electrode assembly are classified into pouch-type batteries in which a pouch-type case of an aluminum laminate sheet is incorporated.
- secondary batteries are classified according to the structure of an electrode assembly having a structure in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are formed.
- Jelly-roll type electrode assembly having a structure wound in a state where a separator is interposed, a stack type electrode assembly in which a plurality of anodes and cathodes cut in units of a predetermined size are sequentially stacked with a separator therebetween
- an electrode assembly having an advanced structure which is a mixed form of the jelly-roll type and the stack type has a predetermined unit.
- Stacked / foldable electrode having a structure in which positive and negative electrodes are sequentially wound in a state in which unit cells stacked on a separator film are stacked with a separator interposed therebetween Developed body lip.
- the jelly-roll type electrode assembly has advantages of being easy to manufacture and having an excellent energy density per weight.
- the jelly-roll type electrode assembly has been widely used.
- the conventional lithium secondary battery is caused by the high temperature and high pressure inside the battery caused by abnormal operation state of the battery such as internal short, overcharge state exceeding the allowable current and voltage, exposure to high temperature, dropping, etc. May cause an explosion. That is, when the secondary battery is overheated due to abnormal operation, there is a possibility that gas may be generated inside and explode due to an increase in pressure. If the temperature of the secondary battery rises sharply due to a short circuit current, the gas may ignite to cause a fire accident together with an explosion. It is also raised.
- the temperature of the surface of a secondary battery was measured and the value was monitored.
- the temperature inside the secondary battery is difficult to measure in real time, only after-effects are possible, and precautionary measures are virtually impossible. That is, when a short circuit occurs in the secondary battery due to penetration of a needle object, and a short circuit current flows, a rapid electrochemical reaction occurs in the positive electrode plate and the negative electrode plate, and heat is generated. Ascend at a high speed. Therefore, it takes a certain time for the temperature of the surface of the secondary battery to rise rapidly based on the time when the short circuit occurs, so when the overheat is detected by measuring the temperature of the surface, the short circuit current flows considerably, causing safety problems. To be.
- a technique for measuring the temperature inside the battery in real time is being developed, and a conventional technique (KR2014-0131716) has a resistance thermometer (RTD), a thermocoupler, and a thermistor.
- the temperature sensor was measured by attaching it to the cell surface, but the sensor member was attached as a separate additional process during manufacturing, which not only caused the complexity of the process, the increase of cost, and the decrease of the battery capacity,
- There are problems such as frequent failure of the sensor member and error or error of measurement temperature, limitation of application to various types of secondary batteries such as jelly-roll type, stack and stack / fold type secondary batteries.
- a temperature measuring sensor such as a thermocoupler may partially pressurize the electrode to deform the electrode model. Pressurization and deformation may cause delamination of the active material or breakage of the separator in the electrode, and when measuring by a thermocoupler or thermistor, there is a point of inability to accurately measure temperature due to a response speed (25 ms). Was present.
- the temperature measuring sensor is corroded by the electrolyte of the battery cell to generate metal ions that can generate a low voltage.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- an electrode mixture including an electrode active material to a cathode and an anode as described later, and an electrode terminal is formed as an external input / output terminal on the anode and the cathode.
- the battery cell according to the present invention is a battery cell including an electrode assembly having a structure in which a separator is interposed between a positive electrode, a negative electrode, and a positive electrode and a negative electrode,
- the positive electrode and the negative electrode are coated with an electrode mixture including an electrode active material on one or both surfaces of a current collector;
- a first positive electrode terminal and a first negative electrode terminal are formed on the positive electrode and the negative electrode, respectively, as external input / output terminals of the battery cell;
- At least one of the positive electrode and the negative electrode is characterized in that the resistance measuring terminal for measuring the resistance of the current collector is formed in the opposite position of the external input and output terminals.
- a method of measuring the temperature of the temperature of the battery cell a method of measuring the temperature of the battery surface or inserting a separate sensor member into the battery cell is used.
- the present invention is formed by forming a resistance measuring terminal on at least one of the positive electrode or the negative electrode of the battery cell and measuring the resistance change in real time through the resistance measuring terminal, the resistance curve according to the temperature of a specific metal Since the change of the resistance of the positive electrode or the negative electrode during the operation of the secondary battery can be measured in real time the temperature inside the battery cell.
- the resistance of the current collector is measured by electrically connecting one external input / output terminal selected from the first positive terminal and the second negative terminal, and a resistance measurement terminal having the same polarity as the selected external input / output terminal. Resistance measuring member; And a controller for estimating the temperature of the battery cell in response to the resistance value of the current collector measured from the resistance measuring member.
- the one external input / output terminal and the resistance measuring terminal having the same polarity are not particularly limited, but in one specific example, may be electrically connected to a connection member made of copper, aluminum, or an alloy thereof.
- the controller may estimate the temperature based on the measured resistance value of the current collector based on the temperature correlation according to the resistance of the metal itself forming the current collector.
- an electrode terminal for resistance measurement may be formed in the positive electrode or the negative electrode, and the electrode assembly is a specific example, in which one positive electrode sheet and one negative electrode sheet are wound with a separator interposed therebetween.
- One end of the positive electrode sheet is formed with a first positive electrode non-coating portion is not coated with the electrode assembly
- One end of the negative electrode sheet is formed with a first negative electrode non-coating portion is not coated with the electrode
- the first positive electrode terminal may be coupled to the current collector of the first positive electrode non-coating portion
- the first negative electrode terminal may be coupled to the current collector of the first negative electrode non-coating portion.
- the battery cell according to the present invention may include a jelly-roll type (winding type) electrode assembly having a structure in which a long sheet type positive electrode and negative electrode are wound with a separator interposed therebetween, Each of the one end portion may have a structure in which an uncoated portion, to which the electrode mixture is not applied, is formed and the electrode terminals are coupled thereto.
- a jelly-roll type (winding type) electrode assembly having a structure in which a long sheet type positive electrode and negative electrode are wound with a separator interposed therebetween,
- Each of the one end portion may have a structure in which an uncoated portion, to which the electrode mixture is not applied, is formed and the electrode terminals are coupled thereto.
- a second positive electrode non-coating portion having no electrode union is formed, and a resistance measuring positive electrode is formed on the current collector of the second positive electrode non-coating portion.
- the terminals may be coupled.
- a second negative electrode non-coating portion having no electrode union applied is formed at the other end of the negative electrode sheet at a position facing the first negative electrode non-coating portion, and a negative electrode terminal for resistance measurement on the current collector of the second negative electrode non-coating portion. May be combined.
- the position of the resistance measurement electrode terminal is not particularly limited as long as it is an unsupported non-coated phase, but since the resistance is measured at the shortest distance, in order to broaden the range of the measurement temperature, the first It is preferable to be located on the 2nd positive electrode non-coating part located in the position which opposes a 2nd positive electrode non-coating part or the position which opposes a 1st negative electrode non-coating part. In other words, it is preferably located at both ends of the electrode. However, if only the temperature of a specific part is to be measured, the position of the electrode terminal should be included in the range in which the resistance is measured.
- the electrode assembly included in the battery cell according to the present invention in one specific example, has a structure in which a plurality of positive electrode plates and a plurality of negative electrode plates are stacked with a separator interposed therebetween, and ends of one side of each of the positive electrode plates.
- the positive electrode tab to which the electrode assembly is not applied is protruded outwardly
- the negative electrode tab to which the electrode assembly is not applied is protruded outwardly at one end of each of the negative electrode plates, and the positive electrode tabs are coupled to the positive electrode lead to form the first positive electrode terminal.
- negative electrode tabs coupled to the negative electrode lead to form a first negative electrode terminal in one specific example, has a structure in which a plurality of positive electrode plates and a plurality of negative electrode plates are stacked with a separator interposed therebetween, and ends of one side of each of the positive electrode plates.
- the positive electrode tab to which the electrode assembly is not applied is protruded outwardly
- the negative electrode tab to which the electrode assembly is not applied is
- the battery cell according to the present invention may include an electrode assembly having a structure (stack type) in which a plurality of positive and negative electrodes cut in units of a predetermined size are sequentially stacked with a separator therebetween, and a plurality of electrodes Electrode tabs protrude from one end of each of the plates and may have a structure in which they are coupled to electrode leads to form electrode terminals.
- a structure stack type
- Electrode tabs protrude from one end of each of the plates and may have a structure in which they are coupled to electrode leads to form electrode terminals.
- the positive electrode tab for resistance measurement may protrude outwardly from one of the positive electrode plates opposite to the positive electrode tabs, and the negative electrode plate of one of the negative electrode plates may measure resistance at opposite positions of the negative electrode tabs.
- the negative electrode tab may protrude outward.
- each of the unit cells having a structure in which at least one positive electrode plate and at least one negative electrode plate is laminated in a state in which a separator is interposed, wound by a separation film
- the positive electrode tabs on which the electrode assemblies are not coated are protruded outwardly from one end of each of the positive electrode plates, and the negative electrode tabs are not coated on the one end of each of the negative electrode plates.
- the outwardly protruding, the positive electrode tabs of the wound unit cells are coupled to the positive electrode lead to form a first positive electrode terminal, and the negative electrode tabs of the wound unit cells are coupled to the negative electrode lead to form a first negative electrode terminal.
- the battery cell according to the present invention is an electrode assembly of an advanced structure in which the jelly-roll type and the stack type are mixed, and the unit cells of the positive and negative electrodes of a predetermined unit are laminated on the separation film.
- the electrode assembly may include an electrode assembly having a structure (stack / folding type) sequentially wound in a state of being positioned in an electrode position, and electrode tabs protrude from one end of each of the electrode plates, and the electrode tabs are coupled to the electrode lead to form an electrode terminal. It may have a structure to form.
- a positive electrode tab for resistance measurement may protrude outwardly from one of the positive electrode plates in the wound unit cells, and a negative plate of one of the negative electrode plates in the wound unit cells.
- the negative electrode tab for resistance measurement may protrude outward from a position opposite the negative electrode tabs.
- the battery cell according to the present invention it is possible to form an additional resistance measurement terminal on the positive electrode surface and / or the negative electrode surface perpendicular to the resistance measurement terminal.
- the plurality of resistance measuring terminals may be electrically connected by a connection member so that the resistance of the current collector may be measured by the resistance measuring member, and the temperature of the battery cell may be estimated based on the measured resistance value. Therefore, by additionally forming a resistance measuring terminal in the electrode, it is possible to measure the resistance of the battery cell even without using the existing electrode terminal bar, it is possible to flexibly cope with the production of various types of battery cells. .
- the battery cell according to the present invention may be composed of one positive electrode tab and negative electrode tab, a pair of positive electrode tab for resistance measurement and negative electrode tab for resistance measurement, respectively,
- the pair of positive electrode tabs for resistance measurement and the negative electrode tab for resistance measurement are electrically connected, and the resistance measurement member is connected to the connection member to measure the resistance of the current collector, and estimate the temperature of the battery cell through the control unit.
- the present invention provides a battery pack including the battery cell, wherein the control unit may further include a function of releasing the electrical connection of the external input and output terminals of the battery cell when the measured temperature is above the threshold.
- the battery pack according to the present invention accurately predicts the resistance change of the battery cell in real time through the resistance measuring terminal, and even if the battery is overheated due to abnormal operation of the battery, the temperature of the battery is higher than or equal to a preset threshold temperature set in the controller. When it rises, it automatically releases the electrical connection of the external input and output terminals to prevent explosion or fire in advance to provide a battery pack with improved safety.
- the battery cells included in the battery pack may be lithium secondary batteries, but are not limited thereto.
- Such a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator and a lithium salt-containing nonaqueous electrolyte, and these are known in the art, and thus detailed description thereof is omitted herein.
- the present invention also provides a device including the battery pack as a power source.
- the device may be selected from mobile phones, portable computers, smartphones, smart pads, netbooks, wearable electronics, light electronic vehicles (LEVs), electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, and power storage devices. Since the structure of the battery pack, the device and the manufacturing method thereof are also known in the art, a detailed description thereof will be omitted herein.
- FIG. 1 is a perspective view showing a positive electrode and a negative electrode according to the present invention.
- FIG. 2 is a plan view showing that the resistance measuring member and the control unit are coupled to the positive electrode according to the present invention.
- FIG 3 is a perspective view showing that the positive electrode, the separator, and the negative electrode according to the present invention are sequentially stacked, and that the electrode terminal and the electrode terminal for resistance measurement are coupled to the positive electrode and the negative electrode, respectively.
- FIG. 4 is an enlarged view showing a coupling portion of a positive electrode terminal and a positive electrode terminal for resistance measurement and a positive electrode plate.
- FIG. 5 is an enlarged view showing a coupling portion of a negative electrode terminal and a negative electrode terminal for resistance measurement and a negative electrode plate.
- FIG. 6 is a perspective view showing a structure in which the positive electrode sheet and the negative electrode sheet according to the present invention are wound with a separator interposed therebetween.
- FIG. 7 is a perspective view illustrating a structure in which one positive electrode plate and a negative electrode plate are stacked with a separator interposed therebetween.
- FIG. 8 is a perspective view illustrating a structure in which one positive electrode plate and one negative electrode plate are stacked with a separator interposed therebetween and a resistance measuring member and a control unit are coupled to each other.
- FIG. 9 is a perspective view illustrating measurement of resistance between the positive electrode tab for resistance measurement by adding the positive electrode tab for resistance measurement.
- FIG. 10 is a perspective view illustrating a structure in which a plurality of positive electrode plates and a plurality of negative electrode plates are stacked with a separator interposed therebetween and a resistance measuring member and a control unit are coupled to each other.
- FIG. 11 is an enlarged cross-sectional view illustrating one side part of FIG. 9.
- FIG. 12 is a plan view showing that at least one positive electrode plate and at least one negative electrode plate are arranged with a separator interposed therebetween.
- FIG. 13 is a front view illustrating a structure in which unit cells having a structure in which at least one positive electrode plate and at least one negative electrode plate are laminated with a separator interposed therebetween are wound by a separator film.
- FIG. 1 is a perspective view showing a positive electrode and a negative electrode according to the present invention
- Figure 2 is a plan view showing that the resistance measuring member and the control unit is coupled to the positive electrode according to the present invention.
- the battery cell 10 according to the present invention is the positive electrode 100 and the negative electrode 200 and the separator 300 is interposed between the positive electrode 100 and the negative electrode 200
- an electrode mixture including electrode active materials 120 and 220 is coated on one or both surfaces of the current collectors 110 and 210, respectively, on the electrodes 100 and 200.
- First electrodes 130 and 230 are formed on the electrodes 100 and 200 as external input / output terminals of the battery cell 10, respectively, and at least one of the electrodes 100 and 200 is first electrode terminal 130.
- Resistance measuring terminals 150 and 250 for measuring the resistance of the current collectors 110 and 210 are formed at opposite positions of the second and second ends 230.
- the cathode 100 for resistance measurement is formed on the anode 100, and the cathode terminal 250 for resistance measurement is formed on the cathode 200.
- the resistance measurement having the same polarity as the external input and output terminals selected from the first positive terminal 130 and the first negative terminal 230, the selected external input and output terminals
- the terminals 150 and 250 and the resistance measuring member 20 are electrically connected by the connecting member 40 to measure the resistance on the current collectors 110 and 210.
- the resistance values of the current collectors 110 and 210 measured from the resistance measuring member 20 are input to the controller 30, and the controller 30 applies the input resistance values to a resistance curve graph according to temperature to collect the current collectors. Estimate the current temperature at (110, 210).
- FIG. 3 is a perspective view showing that the positive electrode, the separator, and the negative electrode according to the present invention are stacked in this order, and that the electrode terminal and the electrode for resistance measurement are coupled to the positive electrode and the negative electrode, respectively, and FIG. 4 shows the positive electrode terminal and the resistance measurement.
- An enlarged view showing a coupling portion of the positive electrode terminal for the illustrated is shown
- Figure 5 is an enlarged view showing a coupling portion of the negative electrode terminal and the negative electrode for resistance measurement
- Figure 6 is a positive electrode sheet and a negative electrode sheet according to the present invention
- a perspective view showing the structure in which the separator is wound with the separator interposed therebetween is shown.
- the electrode assembly according to the present invention in one specific example, one positive electrode sheet 100 and one negative electrode sheet 200 is wound with the separator 300 interposed therebetween It has a structure.
- the first positive electrode non-coating portion 160 to which the electrode mixture is not coated is formed at one end of the positive electrode sheet 100, and the first negative electrode to which the electrode compound is not coated is applied at one end of the negative electrode sheet 200.
- the uncoated portion 260 is formed.
- a first positive electrode terminal 130 is coupled to the positive electrode current collector 110 of the first positive electrode non-coating portion 160, and the first negative electrode non-coating portion 260 of the first negative electrode non-coating portion 260 is coupled to the first positive electrode terminal portion 260.
- the first negative electrode 230 is coupled to the negative electrode current collector 210.
- a second positive electrode non-coating portion 170 is not formed on the other end of the positive electrode sheet 100 at a position opposite to the first positive electrode non-coating portion 160, the electrode is not coated
- the positive electrode terminal 150 for resistance measurement is coupled on the current collector 110 of the second positive electrode non-coating portion 170, or the other side of the negative electrode sheet 200 at a position facing the first negative electrode non-coating portion 260.
- a second negative electrode non-coating portion 270 having no electrode coalescing is formed, and a negative electrode terminal 250 for resistance measurement is coupled on the current collector 210 of the second negative electrode non-coating portion 270. have.
- the first negative electrode terminal 230 and the negative electrode terminal 250 for resistance measurement which are formed on the negative electrode sheet 200, are electrically connected to each other by a connecting member 40.
- the resistance values of the entire 110 and 210 are measured by the resistance measuring member 20, and the measured resistance values are input to the controller 30 to estimate the temperature of the current collectors 110 and 210 in real time.
- FIG. 7 is a perspective view illustrating a structure in which one positive electrode plate and a negative electrode plate are laminated with a separator interposed therebetween, and in FIG. 8, one positive electrode plate and one negative electrode plate are laminated with a separator interposed therebetween, and a resistance measuring member is provided.
- a perspective view showing the structure in which the control unit is coupled is shown.
- the battery cell according to the present invention in one specific example, the positive electrode plate 100 is coated with a positive electrode mixture including the positive electrode active material 120 on both sides of the positive electrode current collector 110 ) And a negative electrode plate 200 coated with a negative electrode mixture including a negative electrode active material 220 on both surfaces of the negative electrode current collector 210 are laminated with the separator 300 interposed therebetween. At one end of each of the electrode tabs 180, 280, which are not coated with electrode coalescing, protrude outwardly, the electrode tabs 180, 280 are coupled to an electrode lead (not shown) to form a first electrode terminal ( 130, 230).
- the electrode tabs 190 and 290 for resistance measurement protrude outward from the electrode plates 100 and 200 at positions opposite to the electrode tabs 180 and 280, and these electrode tabs are connected by the connecting member 40.
- 180 and 280, the resistance measuring electrode tabs 190 and 290, and the resistance measuring member 20 are electrically connected to each other, and additionally includes a controller 30 for estimating the temperature of the battery cell by inputting a resistance value. have.
- the stacked electrode assembly includes a positive electrode tab 180 protruding from one end of the positive electrode plate 100, which is combined with a positive electrode lead (not shown) to form a first positive electrode terminal 130.
- the resistance value of the positive electrode current collector 110 is electrically connected by the resistance measuring positive electrode tab 190 and the connecting member 40 at a position opposed to the positive electrode tab 180.
- the measured and measured resistance value is input to the controller 30 to measure the temperature of the positive electrode current collector 110 in real time.
- FIG. 9 is a perspective view illustrating the measurement of resistance between the positive electrode tab for resistance measurement by adding the positive electrode tab for resistance measurement.
- the battery cell 10 includes, in one specific example, a pair of electrode tabs 180 and 280 and a pair of electrode tabs 190, 190, 290, respectively, for resistance measurement.
- a pair of positive electrode tabs 190 and 190 for resistance measurement are electrically connected by the connection member 40, and additionally input a resistance value to control the temperature of the battery cell 30. It includes. Therefore, it is not necessary to use the existing electrode tabs 180 and 280 to measure the internal temperature of the battery cell 10 according to the present invention, and by adding the electrode tabs 190 and 290 for resistance measurement, the current collector ( 110, 210) can be measured.
- FIG. 10 is a perspective view illustrating a structure in which a plurality of positive electrode plates and a plurality of negative electrode plates are stacked with a separator interposed therebetween and a resistance measuring member and a control unit are coupled to each other
- FIG. 11 is an enlarged cross-sectional view illustrating one side of FIG. 10. Is shown.
- the battery cell 10 includes, in one specific example, one positive electrode plate 100 and a negative electrode plate 200 shown in FIG. 7 having a separator 300.
- stacked in the state through this has a structure which is laminated
- the cathode active material 220 is disposed on both surfaces of the cathode plate 100, the separator 300, and the anode current collector 210, on which the cathode mixture including the cathode active material 120 is coated on both surfaces of the cathode current collector 110. It has a stacked structure that is sequentially stacked in the order of the negative electrode plate 200, the separator 300 is coated with a negative electrode mixture including a.
- FIG. 12 is a plan view showing that at least one positive electrode plate and at least one negative electrode plate are arranged with the separator interposed therebetween, and in FIG. 13, at least one positive electrode plate and the at least one negative electrode plate are laminated with the separator interposed therebetween.
- a front view showing the structure in which the unit cells having the structure shown in FIG. 3 are wound by the separation film is shown.
- the battery cell 10 in one specific example, the one or more positive electrode plate 100 and one or more negative electrode plate 200 is a state in which the separator 300 is interposed Unit cells having a stacked structure have a structure in which the unit cells are wound by the separation film 50.
- each of the unit cells has electrode tabs 180 and 280 protruding outwardly from each of the electrode plates 100 and 200, and the electrode tabs 180 and 280 are coupled to an electrode lead (not shown). Electrode terminals 130 and 230 are formed, and the electrode tabs 190 for resistance measurement at positions opposite to the electrode tabs 180 and 280 on one of the electrode plates 100 and 200 in the unit cells. , 290 is formed.
- the stack / foldable electrode assembly includes a positive electrode tab 180 protruding from one end of the positive electrode plate 100, which is combined with a positive electrode lead (not shown) to connect the first positive electrode terminal 130.
- a resistance value of the positive electrode current collector 110 is electrically connected by the resistance measuring positive electrode tab 190 and the connecting member 40 positioned at the position opposite to the positive electrode tab 180. The measured resistance value is input to the controller 30 to measure the temperature of the positive electrode current collector 110 in real time.
- the battery cell according to the present invention in one specific example, as shown in Figure 12, the outermost is composed of the A-type bi-cell 60 and the outermost negative electrode plate 200 is composed of a positive electrode plate (100) C-type bi-cells 70 are formed to form a structure that is wound by the separation film (50).
- the battery cell according to the present invention forms a resistance measuring terminal for measuring the resistance of the current collector in the opposite position of the external input and output terminals on at least one of the positive electrode and the negative electrode to adjust the current collector temperature of the battery cell in real time.
- the protection device can be operated and the temperature inside the battery cell can be detected more accurately. Therefore, the safety is improved, the manufacturing process and economic efficiency are excellent, and the battery cell can be applied to various types of electrode assemblies. Has the effect of providing.
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Abstract
Description
Claims (15)
- 양극, 음극 및 양극과 음극 사이에 분리막이 개재되어 있는 구조의 전극조립체를 포함하는 전지셀로서,상기 양극 및 음극은 집전체의 일면 또는 양면에 전극활물질을 포함하는 전극 합제가 도포되어 있고;상기 양극 및 음극에는 각각 전지셀의 외부 입출력 단자로서 제 1 양극 단자와 제 1 음극 단자가 형성되어 있으며;상기 양극 및 음극 중의 적어도 하나에는 외부 입출력 단자의 대향 위치에 집전체의 저항을 측정하기 위한 저항 측정용 단자가 형성되어 있는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 양극에는 저항 측정용 양극 단자가 형성되어 있고, 상기 음극에는 저항 측정용 음극 단자가 형성되어 있으며, 집전체의 저항 측정을 측정하는 저항 측정부재 및 전지셀의 온도를 추정하는 제어부를 더 포함하는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전극조립체는,하나의 양극 시트와 하나의 음극 시트가 분리막이 개재된 상태로 권취되어 있는 구조로 이루어져 있으며;양극 시트의 일측 단부에는 전극 합체가 도포되어 있지 않은 제 1 양극 무지부가 형성되어 있고, 음극 시트의 일측 단부에는 전극 합체가 도포되어 있지 않은 제 1 음극 무지부가 형성되어 있으며;상기 제 1 양극 무지부의 집전체 상에 제 1 양극 단자가 결합되어 있고, 상기 제 1 음극 무지부의 집전체 상에 제 1 음극 단자가 결합되어 있는 것을 특징으로 하는 전지셀.
- 제 3 항에 있어서, 상기 제 1 양극 무지부에 대향하는 위치에서 양극 시트의 타측 단부에는 전극 합체가 도포되어 있지 않은 제 2 양극 무지부가 형성되어 있고, 상기 제 2 양극 무지부의 집전체 상에 저항 측정용 양극 단자가 결합되어 있는 것을 특징으로 하는 전지셀.
- 제 3 항에 있어서, 상기 제 1 음극 무지부에 대향하는 위치에서 음극 시트의 타측 단부에는 전극 합체가 도포되어 있지 않은 제 2 음극 무지부가 형성되어 있고, 상기 제 2 음극 무지부의 집전체 상에 저항 측정용 음극 단자가 결합되어 있는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전극조립체는,복수의 양극판들과 복수의 음극판들이 분리막이 개재된 상태로 적층되어 있는 구조로 이루어져 있으며;양극판들 각각의 일측 단부에는 전극 합체가 도포되어 있지 않은 양극 탭이 외향 돌출되어 있고, 음극판들 각각의 일측 단부에는 전극 합체가 도포되어 있지 않은 음극 탭이 외향 돌출되어 있으며;양극 탭들이 양극 리드에 결합되어 제 1 양극 단자를 형성하고 있고, 상기 음극 탭들이 음극 리드에 결합되어 제 1 음극 단자를 형성하고 있는 것을 특징으로 하는 전지셀.
- 제 6 항에 있어서, 상기 양극판들 중의 하나 양극 판에는 양극 탭들에 대향하는 위치에서 저항 측정용 양극 탭이 외향 돌출되어 있는 것을 특징으로 하는 전지셀.
- 제 6 항에 있어서, 상기 음극판들 중의 하나의 음극 판에는 음극 탭들에 대향하는 위치에서 저항 측정용 음극 탭이 외향 돌출되어 있는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전극조립체는,각각 하나 이상의 양극판과 하나 이상의 음극판이 분리막이 개재되어 있는 상태로 적층된 구조를 가진 단위셀들이 분리필름에 의해 권취되어 있는 구조로 이루어져 있으며;상기 단위셀들에서 양극판들 각각의 일측 단부에는 전극 합체가 도포되어 있지 않은 양극 탭이 외향 돌출되어 있고, 음극판들 각각의 일측 단부에는 전극 합체가 도포되어 있지 않은 음극 탭이 외향 돌출되어 있으며;권취된 단위셀들의 양극 탭들이 양극 리드에 결합되어 제 1 양극 단자를 형성하고 있고, 권취된 단위셀들의 음극 탭들이 음극 리드에 결합되어 제 1 음극 단자를 형성하고 있는 것을 특징으로 하는 전지셀.
- 제 9 항에 있어서, 상기 권취된 단위셀들에서 양극판들 중의 하나 양극 판에는 양극 탭들에 대향하는 위치에서 저항 측정용 양극 탭이 외향 돌출되어 있는 것을 특징으로 하는 전지셀.
- 제 9 항에 있어서, 상기 권취된 단위셀들에서 음극판들 중의 하나의 음극 판에는 음극 탭들에 대향하는 위치에서 저항 측정용 음극 탭이 외향 돌출되어 있는 것을 특징으로 하는 전지셀.
- 제 2 항에 있어서, 상기 제어부는, 집전체를 형성하는 금속 자체의 저항에 따른 온도 상관 관계를 바탕으로, 측정된 집전체의 저항 값을 통해 온도를 추정하는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 저항 측정용 단자에 수직으로 인접한 전극면에는 저항 측정용 단자가 추가적으로 형성되어 있고,상기 저항 측정용 단자들을 연결부재에 의해 전기적으로 연결하여 집전체의 저항을 측정하는 것을 특징으로 하는 전지셀.
- 제 1 항 내지 제 13 항 중 어느 하나에 따른 전지셀을 포함하는 것을 특징으로 하는 전지팩.
- 제 14 항에 있어서, 상기 제어부는, 측정된 온도가 임계치 이상일 때, 전지셀의 외부 입출력 단자의 전기적 연결을 해제하는 기능을 추가로 포함하는 것을 특징으로 하는 전지팩.
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PL17889679T PL3442073T3 (pl) | 2017-01-03 | 2017-12-07 | Ogniwo akumulatorowe zdolne do pomiaru temperatury wewnętrznej |
CN201780021362.0A CN108886179B (zh) | 2017-01-03 | 2017-12-07 | 能够测量电池单元的内部温度的电池单元 |
US16/093,391 US10897066B2 (en) | 2017-01-03 | 2017-12-07 | Battery cell capable of measuring inner temperature thereof |
EP17889679.1A EP3442073B1 (en) | 2017-01-03 | 2017-12-07 | Battery cell capable of measuring internal temperature |
JP2018550712A JP6860126B2 (ja) | 2017-01-03 | 2017-12-07 | 内部温度の測定が可能な電池セル |
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KR10-2017-0000678 | 2017-01-03 | ||
KR1020170000678A KR102105172B1 (ko) | 2017-01-03 | 2017-01-03 | 내부의 온도를 측정할 수 있는 전지셀 |
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JP (1) | JP6860126B2 (ko) |
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CN (2) | CN108886179B (ko) |
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- 2017-01-03 KR KR1020170000678A patent/KR102105172B1/ko active IP Right Grant
- 2017-12-07 PL PL17889679T patent/PL3442073T3/pl unknown
- 2017-12-07 EP EP17889679.1A patent/EP3442073B1/en active Active
- 2017-12-07 US US16/093,391 patent/US10897066B2/en active Active
- 2017-12-07 JP JP2018550712A patent/JP6860126B2/ja active Active
- 2017-12-07 WO PCT/KR2017/014296 patent/WO2018128283A1/ko active Application Filing
- 2017-12-07 CN CN201780021362.0A patent/CN108886179B/zh active Active
- 2017-12-20 TW TW106144672A patent/TWI734880B/zh active
- 2017-12-29 CN CN201721896464.0U patent/CN208336422U/zh active Active
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CN111092251A (zh) * | 2018-10-24 | 2020-05-01 | 现代自动车株式会社 | 袋型电池单元 |
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Also Published As
Publication number | Publication date |
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KR20180079924A (ko) | 2018-07-11 |
CN108886179A (zh) | 2018-11-23 |
US10897066B2 (en) | 2021-01-19 |
CN108886179B (zh) | 2021-05-28 |
TWI734880B (zh) | 2021-08-01 |
CN208336422U (zh) | 2019-01-04 |
JP6860126B2 (ja) | 2021-04-14 |
EP3442073A1 (en) | 2019-02-13 |
PL3442073T3 (pl) | 2021-10-04 |
JP2019510351A (ja) | 2019-04-11 |
EP3442073A4 (en) | 2019-07-24 |
EP3442073B1 (en) | 2020-11-25 |
KR102105172B1 (ko) | 2020-04-27 |
US20190190092A1 (en) | 2019-06-20 |
TW201830764A (zh) | 2018-08-16 |
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