WO2022092621A1 - 배터리 진단 장치 및 방법 - Google Patents
배터리 진단 장치 및 방법 Download PDFInfo
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- WO2022092621A1 WO2022092621A1 PCT/KR2021/014043 KR2021014043W WO2022092621A1 WO 2022092621 A1 WO2022092621 A1 WO 2022092621A1 KR 2021014043 W KR2021014043 W KR 2021014043W WO 2022092621 A1 WO2022092621 A1 WO 2022092621A1
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- battery
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- degradation
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- soh
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- 238000000034 method Methods 0.000 title claims description 41
- 230000015556 catabolic process Effects 0.000 claims abstract description 95
- 238000006731 degradation reaction Methods 0.000 claims abstract description 95
- 238000003745 diagnosis Methods 0.000 claims abstract description 81
- 230000006866 deterioration Effects 0.000 claims description 21
- 230000036541 health Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 14
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000015654 memory Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000000157 electrochemical-induced impedance spectroscopy Methods 0.000 description 8
- 230000005856 abnormality Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 3
- 238000002847 impedance measurement Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- 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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- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- 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
Definitions
- the present disclosure relates to an apparatus and method for diagnosing a battery, and more particularly, to an apparatus and method for diagnosing a state of a battery by using an SOH estimated through measurement of a degradation degree of a battery and an AC impedance.
- the secondary battery is a battery capable of charging and discharging, and includes all of the conventional Ni/Cd batteries, Ni/MH batteries, and the latest lithium ion batteries.
- lithium ion batteries have an advantage in that their energy density is much higher than that of conventional Ni/Cd batteries and Ni/MH batteries.
- lithium ion batteries can be manufactured in a small size and light weight, so they are used as power sources for mobile devices.
- the lithium ion battery is receiving attention as a next-generation energy storage medium as the range of use has been expanded as a power source for electric vehicles.
- the secondary battery is generally used as a battery pack including a battery module in which a plurality of battery cells are connected in series and/or in parallel.
- the state and operation of the battery pack are managed and controlled by the battery management system.
- a typical example of a device operating through such a battery is an electric vehicle (EV) or an energy storage system (ESS).
- EV electric vehicle
- ESS energy storage system
- the present disclosure provides a battery diagnosis apparatus and method capable of quickly and easily diagnosing the state of a battery by calculating the deterioration degree of the battery and estimating the SOH of the battery through AC impedance to classify the battery in a short time The purpose.
- a battery diagnosis apparatus includes a battery cell, a calculator for calculating a degree of degradation of a battery module including the battery cell, a measuring unit for measuring AC impedance of a battery pack including the battery module; An estimator for estimating the SOH of the battery pack based on the AC impedance of the battery pack, and the state of the battery pack based on the degree of degradation of the battery cell, the degree of degradation of the battery module, and the SOH of the battery pack It may include a diagnostic unit.
- the diagnosis unit of the battery diagnosis apparatus may determine whether the battery pack can be reused based on the degradation degree of the battery cell, the degradation degree of the battery module, and the SOH of the battery pack.
- the diagnosis unit of the battery diagnosis apparatus may diagnose the state of the battery pack based on a deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module.
- the diagnosis unit of the battery diagnosis apparatus may determine that the battery pack is reusable when a deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module is included in a reference range. there is.
- the calculator of the battery diagnosis apparatus calculates the degree of degradation of the battery module, the measurer measures the AC impedance of the battery module, and the estimator measures the AC impedance of the battery module based on the AC impedance of the battery module
- the SOH of the battery module may be estimated, and the diagnosis unit may diagnose the state of the battery module based on the degradation degree of the battery cell and the SOH of the battery module.
- the diagnosis unit of the battery diagnosis apparatus may determine whether the battery module can be reused based on the degree of degradation of the battery cell and the SOH of the battery module.
- the diagnosis unit of the battery diagnosis apparatus may determine that the battery module is reusable when the deviation of the deterioration degree of the battery cell is included in a reference range.
- the diagnosis unit of the battery diagnosis apparatus may determine that a battery cell having the highest degradation degree among the battery cells can be used as a reference when the deviation of the degradation degree of the battery cell is out of a reference range.
- a calculator for calculating the degree of deterioration of a battery cell of the battery diagnosis apparatus a measuring unit for measuring an AC impedance of a battery module including the battery cell, and the AC impedance of the battery module and an estimator for estimating the SOH of the battery module, and a diagnosis unit for diagnosing the state of the battery module based on the degradation degree of the battery cell and the SOH of the battery module.
- the diagnosis unit of the battery diagnosis apparatus may determine whether the battery module can be reused based on the degree of degradation of the battery cell and the SOH of the battery module.
- the diagnosis unit of the battery diagnosis apparatus may determine that the battery module is reusable when the deviation of the deterioration degree of the battery cell is included in a reference range.
- the diagnosis unit of the battery diagnosis apparatus may determine that a battery cell having the highest degradation degree among the battery cells can be used as a reference when the deviation of the degradation degree of the battery cell is out of a reference range. there is.
- the calculator of the battery diagnosis apparatus calculates the degree of degradation of the battery module, the measurer measures an AC impedance of a battery pack including the battery module, and the estimator measures the level of deterioration of the battery pack
- the SOH of the battery pack may be estimated based on AC impedance, and the diagnosis unit may diagnose the state of the battery pack based on the degree of degradation of the battery cell, the degree of degradation of the battery module, and the SOH of the battery pack.
- the diagnosis unit of the battery diagnosis apparatus may determine whether the battery pack can be reused based on the degradation degree of the battery cell, the degradation degree of the battery module, and the SOH of the battery pack.
- the diagnosis unit of the battery diagnosis apparatus may diagnose the state of the battery pack based on a deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module.
- the diagnosis unit of the battery diagnosis apparatus may determine that the battery pack is reusable when a deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module is included in a reference range. there is.
- a battery diagnosis method includes calculating a battery cell and a degree of degradation of a battery module including the battery cell, measuring an AC impedance of a battery pack including the battery module, and the battery estimating the SOH of the battery pack based on the AC impedance of the pack, and diagnosing the state of the battery pack based on the degradation degree of the battery cell, the degradation degree of the battery module, and the SOH of the battery pack can do.
- the battery diagnosis method includes calculating the degradation degree of the battery module, measuring the AC impedance of the battery module, and estimating the SOH of the battery module based on the AC impedance of the battery module and diagnosing the state of the battery module based on the degradation degree of the battery cell and the SOH of the battery module.
- the battery diagnosis apparatus and method of the present disclosure by calculating the degree of degradation of the battery and estimating the SOH of the battery through the AC impedance to classify the battery in a short time, it is possible to quickly and easily diagnose the state of the battery.
- FIG. 1 is a block diagram showing the configuration of a general battery pack.
- FIG. 2 is a block diagram illustrating a configuration of an apparatus for diagnosing a battery according to an embodiment of the present disclosure.
- FIG. 3 is a diagram illustrating an equivalent circuit of a single battery cell.
- FIG. 4 is a diagram illustrating an equivalent circuit of a battery module or a battery pack.
- FIG. 5 is a diagram illustrating a waveform of an AC impedance measured by a battery diagnosis apparatus according to an embodiment of the present disclosure.
- 6 and 7 are flowcharts illustrating a battery diagnosis method according to an embodiment of the present disclosure.
- FIG. 8 is a diagram illustrating a hardware configuration of a computing system for operating an apparatus for detecting a battery abnormality according to an embodiment of the present disclosure.
- first, second, first, or second used in various embodiments may modify various components regardless of order and/or importance, do not limit
- a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.
- FIG. 1 is a block diagram showing the configuration of a general battery pack.
- FIG. 1 it schematically shows a battery control system including a battery pack 1 and an upper-level controller 2 included in the upper-level system according to an embodiment of the present disclosure.
- the battery pack 1 includes a battery module 10 that is composed of one or more battery cells and is capable of being charged and discharged, and the (+) terminal side or the (-) terminal side of the battery module 10 is in series.
- the switching unit 14 for controlling the charge/discharge current flow of the battery module 10 connected to and a battery management system 20 (eg, MBMS).
- the battery pack 1 may include a plurality of battery modules 10 , a sensor 12 , a switching unit 14 , and a battery management system 20 .
- the switching unit 14 is a device for controlling the current flow for charging or discharging of the plurality of battery modules 10 , for example, at least one relay, a magnetic contactor according to the specifications of the battery pack 1 . etc. may be used.
- the battery management system 20 is an interface for receiving measured values of the various parameters described above, and may include a plurality of terminals and a circuit connected to these terminals to process the received values.
- the battery management system 20 may control ON/OFF of the switching unit 14 , for example, a relay or a contactor, and is connected to the battery module 10 to determine the state of each battery module 10 . can monitor
- the deterioration degree of the battery cell and the battery module may be calculated through a separate program.
- the battery management system 20 may measure the AC impedance between the battery module and the battery pack, estimate the SOH of the battery based on the measurement, and then diagnose whether the battery pack and the battery module can be reused. That is, the battery management system 20 of FIG. 1 may correspond to the battery diagnosis apparatus 100 described below.
- the upper controller 2 may transmit a control signal for the battery module 10 to the battery management system 20 . Accordingly, the operation of the battery management system 20 may be controlled based on a signal applied from the upper controller 2 .
- the battery cell of the present disclosure may be a component included in the battery module 10 used in an electric vehicle.
- the battery pack 1 of FIG. 1 is not limited to this purpose, and for example, a battery rack of the ESS may be included instead of the battery pack 1 of FIG. 1 .
- FIG. 2 is a block diagram illustrating a configuration of an apparatus for diagnosing a battery according to an embodiment of the present disclosure.
- the battery diagnosis apparatus 100 includes a calculator 110 , a measurement unit 120 , an estimator 130 , a diagnosis unit 140 , and a storage unit 150 .
- a calculator 110 may include
- the calculator 110 may calculate a degree of degradation of a battery module including a battery cell and at least one battery cell. Also, the calculator 110 may calculate a deviation between the deterioration degree of the battery cell and the battery module. Specifically, the calculator 110 may calculate the degree of degradation based on the charge/discharge voltage for a predetermined cycle before removing the battery pack. For example, the charge/discharge voltage of the battery cell may be obtained as a voltage in a period in which the state of charge (SOC) of the battery cell is less than 5 or greater than or equal to 95.
- SOC state of charge
- the measurement unit 120 may measure the AC impedance of the battery pack including the battery module and at least one battery module. For example, the measurement unit 120 may measure the AC impedance between the battery module and the battery pack at a predetermined period.
- the AC impedance measured by the measuring unit 120 is different from the conventional measuring method by electrochemical impedance spectroscopy (EIS). That is, in the case of the conventional EIS, impedance is measured in units of battery cells, but the battery diagnosis apparatus 100 according to an embodiment of the present disclosure may measure AC impedance in units of battery modules or battery packs.
- EIS electrochemical impedance spectroscopy
- the impedance of a battery cell unit of less than 5V is measured
- the measuring unit 120 of the battery diagnosis apparatus 100 according to an embodiment of the present disclosure has a voltage range of about 1000V. It can be measured by high voltage alternating current impedance measurement method.
- This high-voltage AC impedance measurement method does not perform measurement by connecting a measuring device to the electrode of a battery cell like the conventional EIS, but rather the +/- terminal of the battery module or battery pack to which a plurality of battery cells are connected and the battery pack. It is directly connected to the high voltage connector connection of the battery cell to measure the AC impedance trend of the total sum of multiple battery cells. This will be described later in detail with reference to FIGS. 3 and 4 .
- the estimator 130 may estimate the state of health (SOH) of the battery module and the battery pack based on the AC impedance of the battery module and the battery pack.
- the estimator 130 may estimate the SOH of the battery module and the battery pack through a table or graph of the correlation between the AC impedance and the SOH of the battery module and the battery pack measured in advance. For example, data on the correlation between AC impedance and SOH may be stored in the storage unit 150 .
- the diagnosis unit 140 may diagnose the state of the battery pack based on the degradation degree of the battery cell, the degradation degree of the battery module, and the SOH of the battery pack. In this case, the diagnosis unit 140 may determine whether the battery pack can be reused based on the degradation degree of the battery cell, the degradation degree of the battery module, and the SOH of the battery pack. Also, the diagnosis unit 140 may diagnose the state of the battery pack based on a deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module.
- the diagnosis unit 140 may determine that the battery pack is reusable when a deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module is included in the reference range (ie, uniform). On the other hand, when the deviation of at least one of the degradation degree of the battery cell and the degradation degree of the battery module is outside the reference range (ie, non-uniformity), the diagnosis unit 140 may determine that the battery pack cannot be reused. In this case, the battery pack can be disassembled and reused as a module unit.
- the diagnosis unit 140 may diagnose the state of the battery module based on the degradation degree of the battery cell and the SOH of the battery module. In this case, the diagnosis unit 140 may determine whether the battery module can be reused based on the degree of degradation of the battery cell and the SOH of the battery module. In addition, the diagnosis unit 140 may diagnose the state of the battery module based on the deviation of the deterioration degree of the battery cell.
- the diagnosis unit 140 may determine that the battery module is reusable when the deviation of the deterioration degree of the battery cell is included in the reference range. On the other hand, when the deviation in the degree of degradation of the battery cells is out of the reference range, the diagnosis unit 140 may determine that the battery cell having the highest degree of degradation among the battery cells is usable as a reference. Accordingly, the user can determine various utilization methods, such as whether to use the most degraded battery cell as a reference or to extract and use the material inside the battery cell.
- the storage unit 150 may store data on the correlation between the AC impedance of the battery module and the battery pack and the SOH. In addition, the storage unit 150 may store various data, such as the deterioration degree of the battery cell and the battery module, the AC impedance of the battery module and the battery pack, and the SOH.
- the battery diagnosis apparatus 100 does not necessarily include the storage unit 150, and stores data in a database in an external server and transmits and receives data through a communication unit (not shown). can be configured.
- the battery diagnosis apparatus by calculating the degree of degradation of the battery and estimating the SOH of the battery through the AC impedance to classify the battery in a short time, the state of the battery is quickly and easily can be diagnosed
- FIG. 3 is a diagram illustrating an equivalent circuit of a single battery cell
- FIG. 4 is a diagram illustrating an equivalent circuit of a battery module or a battery pack.
- the battery diagnosis apparatus applies an alternating current in a specific frequency range (eg, 0.1 to several Hz) to a battery module or a battery pack, and measures the voltage response for each frequency band to determine the impedance of the battery module or battery pack. It can measure magnitude and phase. Also, each parameter value of the battery may be extracted based on a response according to the frequency of each parameter of the equivalent circuit of the battery cell/module/pack.
- a specific frequency range eg, 0.1 to several Hz
- a battery module or battery pack in which a plurality of normal battery cells and at least one abnormal battery cell are connected and the conventional EIS measurement method and Since the equivalent circuit is different, the type and number of extracted result values are different.
- the voltage range is about 20V, and the frequency range is 0.1 to 1050hz.
- the three-electrode measurement method separates the anode and the cathode for measurement, and ohmic resistance can be corrected by removing noise.
- This conventional measurement method performs measurement in a steady state of the battery cell, that is, in a chemical equilibrium and a potential equilibrium state of the positive electrode, and detects an abnormality through absolute comparison of the battery cell with a reference value.
- the existing cell-unit EIS measurement method requires disassembling the battery module or battery pack in cell-by-cell units, and since it is difficult to measure three electrodes and form a chemical equilibrium state, there are limitations when applied to actual products.
- the voltage range is about 1000V, and the frequency range is 0.1 to 4000hz.
- a two-electrode measurement method is used for a plurality of battery cells connected in series, and repeated and reproducible measurement is possible.
- the high voltage AC impedance measurement method used in the battery diagnostic device performs measurement in a state after the charging and discharging of all battery modules in the same battery rack are simultaneously completed, and relative comparison and absolute for each battery module All comparisons are possible.
- the impedance value of the battery system increases in proportion to the number of series connections (N) of the battery cells.
- external influences eg, sensing line inductance, contact resistance, etc.
- measurement and abnormality can be performed without disassembling the battery cell unit, and the battery module of the ESS can be reused immediately. It can also be applied immediately to racks or car battery packs. In addition, since there is no need to charge and discharge the battery, power due to charging and discharging can be reduced.
- FIG. 5 is a diagram illustrating a waveform of an AC impedance measured by a battery diagnosis apparatus according to an embodiment of the present disclosure.
- the x-axis represents the resistance element (real(Z)) (mOhm) of the AC impedance
- the y-axis represents the reactance element (Imaginary(Z))(mOhm) of the AC impedance.
- each of the high voltage AC impedance values measured by the measurement unit 120 of the battery diagnosis apparatus 100 at a predetermined period is shown. At this time, it can be confirmed that the shape of the AC impedance waveform of the battery module is different for each battery module.
- the measured AC impedance of a specific battery module is significantly different from that of other battery modules, or a reference set based on the AC impedance of a degraded battery module built in a database in advance
- the degree of deterioration of the battery module may be estimated in a manner such as out of range.
- the remaining lifespan can be checked through a separate charge/discharge test, and it can be used as reference data when an abnormality of the battery module is detected later.
- the remaining lifetime of the replaced battery module with the measured AC impedance value in the storage unit 150 and storing it in a table form, it can be used as reference data when diagnosing an abnormality of the battery module later.
- the reused battery in the case of replacing the deteriorated battery module, it is possible to use the reused battery to replace the battery at a low price and to operate the system stably in accordance with the degree of deterioration of the entire battery system of the ESS.
- 6 and 7 are flowcharts illustrating a battery diagnosis method according to an embodiment of the present disclosure.
- a deterioration degree deviation between a battery cell and a battery module is first calculated ( S102 ).
- the degree of degradation may be calculated based on the charge/discharge voltage for a predetermined cycle before the battery pack is removed.
- the charge/discharge voltage of the battery cell may be obtained as a voltage in a section in which the SOC of the battery cell is less than 5 or greater than or equal to 95.
- the AC impedance of the battery pack is measured (S104).
- the AC impedance of the battery pack may be measured at a predetermined period.
- the SOH of the battery pack is calculated based on the AC impedance of the battery pack ( S106 ).
- the SOH of the battery pack may be estimated through a table or graph of the correlation between the AC impedance of the battery pack and the SOH measured in advance. For example, data on the correlation between AC impedance and SOH may be stored in the storage unit 150 of FIG. 1 .
- the degradation degree deviation between the battery cell and the battery module is included in the reference range ( S108 ). If the degradation degree deviation between the battery cell and the battery module is included in the reference range (ie, uniform) (YES), it is determined whether the SOH of the battery pack is equal to or greater than the reference value (S110). Also, when the SOH of the battery pack is equal to or greater than the reference value (YES), the corresponding battery pack is diagnosed as a reusable battery pack (S112).
- the corresponding battery pack is diagnosed as a non-reusable battery pack ( S114 ).
- the battery pack can be disassembled and reused as a module unit.
- step S114 it is assumed that the non-reusable battery pack is diagnosed in step S114 .
- the AC impedance of the battery module is measured ( S116 ).
- the SOH of the battery module is calculated based on the AC impedance of the battery module (S118).
- the degradation degree deviation of the battery cell is included in the reference range ( S120 ). If the deterioration degree deviation of the battery cell is included in the reference range (ie, uniform) (YES), it is determined whether the SOH of the battery module is equal to or greater than the reference value (S122). Also, when the SOH of the battery module is equal to or greater than the reference value (YES), the corresponding battery module is diagnosed as a reusable battery module (S124).
- the corresponding battery module is diagnosed as a non-reusable battery module ( S126 ).
- the battery cell with the highest degree of degradation among the battery cells can be used as a reference. Accordingly, the user can determine various utilization methods, such as whether to use the most degraded battery cell as a reference or to extract and use the material inside the battery cell.
- the battery diagnosis method of the present disclosure by calculating the degree of deterioration of the battery and estimating the SOH of the battery through the AC impedance to classify the battery in a short time, the state of the battery can be quickly and easily diagnosed. .
- FIG. 8 is a diagram illustrating a hardware configuration of a computing system for operating an apparatus for detecting a battery abnormality according to an embodiment of the present disclosure.
- the computing system 30 may include an MCU 32 , a memory 34 , an input/output I/F 36 , and a communication I/F 38 . .
- the MCU 32 executes various programs (eg, a battery deterioration calculation program, an SOH calculation program, a battery diagnostic program, etc.) stored in the memory 34 , and through these programs, deterioration of the battery cells and battery modules
- FIG. 2 may be a processor that processes various data including AC impedance of the battery module and the battery pack, SOH, and the like, and performs functions of the battery diagnosis apparatus illustrated in FIG. 2 .
- the memory 34 may store various programs related to battery degradation and SOH calculation and battery diagnosis.
- the memory 720 may store various data such as battery degradation, AC impedance, and SOH data.
- Memory 34 may be volatile memory or non-volatile memory.
- RAM volatile memory
- DRAM dynamic random access memory
- SRAM static random access memory
- non-volatile memory ROM, PROM, EAROM, EPROM, EEPROM, flash memory, or the like can be used.
- the examples of memories 34 listed above are merely examples and are not limited to these examples.
- the input/output I/F 36 is an interface that connects between an input device (not shown) such as a keyboard, mouse, and touch panel and an output device such as a display (not shown) and the MCU 32 to transmit/receive data can provide
- the communication I/F 340 is a configuration capable of transmitting and receiving various data to and from the server, and may be various devices capable of supporting wired or wireless communication. For example, a program or various data for calculating the SOH of the battery and diagnosing the battery state may be transmitted/received from an external server provided separately through the communication I/F 38 .
- the computer program according to an embodiment of the present disclosure is recorded in the memory 34 and processed by the MCU 32, so that, for example, it may be implemented as a module performing each function shown in FIG. 2 . .
Abstract
Description
Claims (18)
- 배터리 셀과, 상기 배터리 셀을 포함하는 배터리 모듈의 퇴화도를 산출하는 산출부;상기 배터리 모듈을 포함하는 배터리 팩의 교류 임피던스를 측정하는 측정부;상기 배터리 팩의 교류 임피던스에 기초하여 상기 배터리 팩의 SOH(state of health)를 추정하는 추정부; 및상기 배터리 셀의 퇴화도, 상기 배터리 모듈의 퇴화도 및 상기 배터리 팩의 SOH에 기초하여 상기 배터리 팩의 상태를 진단하는 진단부를 포함하는 배터리 진단 장치.
- 청구항 1에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도, 상기 배터리 모듈의 퇴화도 및 상기 배터리 팩의 SOH에 기초하여 상기 배터리 팩의 재사용 가능 여부를 판단하는 배터리 진단 장치.
- 청구항 1에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도와 상기 배터리 모듈의 퇴화도 중 적어도 하나의 편차에 기초하여 상기 배터리 팩의 상태를 진단하는 배터리 진단 장치.
- 청구항 1에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도와 상기 배터리 모듈의 퇴화도 중 적어도 하나의 편차가 기준 범위에 포함되는 경우, 상기 배터리 팩을 재사용 가능한 것으로 판단하는 배터리 진단 장치.
- 청구항 1에 있어서,상기 산출부는 상기 배터리 모듈의 퇴화도를 산출하고,상기 측정부는 상기 배터리 모듈의 교류 임피던스를 측정하고,상기 추정부는 상기 배터리 모듈의 교류 임피던스에 기초하여 상기 배터리 모듈의 SOH를 추정하고,상기 진단부는 상기 배터리 셀의 퇴화도 및 상기 배터리 모듈의 SOH에 기초하여 상기 배터리 모듈의 상태를 진단하는 배터리 진단 장치.
- 청구항 5에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도 및 상기 배터리 모듈의 SOH에 기초하여 상기 배터리 모듈의 재사용 가능 여부를 판단하는 배터리 진단 장치.
- 청구항 5에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도의 편차가 기준 범위에 포함되는 경우, 상기 배터리 모듈을 재사용 가능한 것으로 판단하는 배터리 진단 장치.
- 청구항 5에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도의 편차가 기준 범위를 벗어나는 경우, 상기 배터리 셀 중 퇴화도가 가장 높은 배터리 셀을 기준으로 사용 가능한 것으로 판단하는 배터리 진단 장치.
- 배터리 셀의 퇴화도를 산출하는 산출부;상기 배터리 셀을 포함하는 배터리 모듈의 교류 임피던스를 측정하는 측정부;상기 배터리 모듈의 교류 임피던스에 기초하여 상기 배터리 모듈의 SOH를 추정하는 추정부; 및상기 배터리 셀의 퇴화도 및 상기 배터리 모듈의 SOH에 기초하여 상기 배터리 모듈의 상태를 진단하는 진단부를 포함하는 배터리 진단 장치.
- 청구항 9에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도 및 상기 배터리 모듈의 SOH에 기초하여 상기 배터리 모듈의 재사용 가능 여부를 판단하는 배터리 진단 장치.
- 청구항 9에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도의 편차가 기준 범위에 포함되는 경우, 상기 배터리 모듈을 재사용 가능한 것으로 판단하는 배터리 진단 장치.
- 청구항 9에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도의 편차가 기준 범위를 벗어나는 경우, 상기 배터리 셀 중 퇴화도가 가장 높은 배터리 셀을 기준으로 사용 가능한 것으로 판단하는 배터리 진단 장치.
- 청구항 9에 있어서,상기 산출부는 상기 배터리 모듈의 퇴화도를 산출하고,상기 측정부는 상기 배터리 모듈을 포함하는 배터리 팩의 교류 임피던스를 측정하고,상기 추정부는 상기 배터리 팩의 교류 임피던스에 기초하여 상기 배터리 팩의 SOH를 추정하고,상기 진단부는 상기 배터리 셀의 퇴화도, 상기 배터리 모듈의 퇴화도 및 상기 배터리 팩의 SOH에 기초하여 상기 배터리 팩의 상태를 진단하는 배터리 진단 장치.
- 청구항 13에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도, 상기 배터리 모듈의 퇴화도 및 상기 배터리 팩의 SOH에 기초하여 상기 배터리 팩의 재사용 가능 여부를 판단하는 배터리 진단 장치.
- 청구항 13에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도와 상기 배터리 모듈의 퇴화도 중 적어도 하나의 편차에 기초하여 상기 배터리 팩의 상태를 진단하는 배터리 진단 장치.
- 청구항 13에 있어서,상기 진단부는 상기 배터리 셀의 퇴화도와 상기 배터리 모듈의 퇴화도 중 적어도 하나의 편차가 기준 범위에 포함되는 경우, 상기 배터리 팩을 재사용 가능한 것으로 판단하는 배터리 진단 장치.
- 배터리 셀과, 상기 배터리 셀을 포함하는 배터리 모듈의 퇴화도를 산출하는 단계;상기 배터리 모듈을 포함하는 배터리 팩의 교류 임피던스를 측정하는 단계;상기 배터리 팩의 교류 임피던스에 기초하여 상기 배터리 팩의 SOH를 추정하는 단계; 및상기 배터리 셀의 퇴화도, 상기 배터리 모듈의 퇴화도 및 상기 배터리 팩의 SOH에 기초하여 상기 배터리 팩의 상태를 진단하는 단계를 포함하는 배터리 진단 방법.
- 청구항 17에 있어서,상기 배터리 모듈의 퇴화도를 산출하는 단계;상기 배터리 모듈의 교류 임피던스를 측정하는 단계;상기 배터리 모듈의 교류 임피던스에 기초하여 상기 배터리 모듈의 SOH를 추정하는 단계; 및상기 배터리 셀의 퇴화도 및 상기 배터리 모듈의 SOH에 기초하여 상기 배터리 모듈의 상태를 진단하는 단계를 더 포함하는 배터리 진단 방법.
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