KR100256732B1 - Battery diagnose method of electric vehicle - Google Patents

Battery diagnose method of electric vehicle Download PDF

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KR100256732B1
KR100256732B1 KR1019970073344A KR19970073344A KR100256732B1 KR 100256732 B1 KR100256732 B1 KR 100256732B1 KR 1019970073344 A KR1019970073344 A KR 1019970073344A KR 19970073344 A KR19970073344 A KR 19970073344A KR 100256732 B1 KR100256732 B1 KR 100256732B1
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South Korea
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battery
module
history data
electric vehicle
voltage
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KR1019970073344A
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Korean (ko)
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KR19990053655A (en
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구재승
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정몽규
현대자동차주식회사
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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
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • 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]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • 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
    • 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
    • H01M10/44—Methods for charging or discharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/90—Driver alarms
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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

Abstract

PURPOSE: A diagnostic method of battery of electric automobile is provided to determine trouble and/or defects of battery at driving and to alarm or indicate the result to driver of the driving automobile. CONSTITUTION: A diagnostic method of battery of electric automobile comprises a first step of detecting each of module voltages when it is a battery opened circuit to set up history data in order according to its size; a second step of detecting each of the module voltages depending on desired discharge current when it is in a battery discharge mode to set up another history data in order according to its size; a third step of analyzing the history data to determine modules having high variation of voltages and modules changed in their order, thereby, to count fault index; a fourth step of determining a fault state when the fault index is higher than a pre-determined value and indicating the condition to a user, otherwise, if the fault index is lower than the value, of charging the module equal to the desired level in a battery charge mode.

Description

전기자동차의 배터리 진단 방법Battery diagnosis method of electric vehicle

본 발명은 전기자동차의 배터리 진단 방법에 관한 것으로, 더욱 상세하게는 전기자동차의 운행중 배터리의 고장 여부를 판단하여 사용자에게 경보하여 주는 전기자동차의 배터리 진단 방법에 관한 것이다.The present invention relates to a method for diagnosing a battery of an electric vehicle, and more particularly, to a method for diagnosing a battery of an electric vehicle that determines whether a battery breaks down during operation of an electric vehicle and alerts a user.

일반적으로 전기자동차는 가솔린 자동차와는 달리 모듈화되어 있는 배터리의 한정된 에너지를 이용하여 주행하는 것으로, 배터리의 한정된 에너지가 소모되면 외부 전원에 의해 배터리를 충전하여야 한다.In general, unlike a gasoline car, an electric vehicle runs using the limited energy of a modular battery, and when the limited energy of the battery is consumed, the electric vehicle must be charged by an external power source.

배터리 충전 방법으로는 CP 모드를 통해 초기에 전 전력을 이용하여 일정 전압 이상 배터리를 충전하고, CC1 모드인 9A의 정전류 충전을 하며, CC2 모드인 4.5A의 정전류 충전을 하는 3단계의 모드를 통해 소모된 배터리의 에너지를 충전한다.In the battery charging method, the CP mode is used to initially charge the battery over a certain voltage using full power, and the constant current charge of 9A, which is CC1 mode, and the constant current charge of 4.5A, which is CC2 mode, are performed through three modes. Recharge the energy of a dead battery.

그리고, 전기자동차 배터리의 각 모듈은 초기 제조 규격 및 모듈의 온도, 모듈의 임피던스 또는 계속적인 충방전 사이클에 따라 사용 가능한 전류량(전하량)에 대한 인가된(충전된) 전류량의 비율로 나타내어지는 충전 상태(SOC : STATE OF CHARGING)가 달라지는 현상이 발생한다.Each module of the electric vehicle battery is then in a state of charge represented by the ratio of the applied (charged) current to the usable current (charge) according to the initial manufacturing specification and the temperature of the module, the impedance of the module, or the continuous charge / discharge cycle. (SOC: STATE OF CHARGING) is changed.

즉, 배터리를 방전하였을 경우 충전 상태가 0일 때의 배터리 팩을 구성하고 있는 각 모듈들의 전압이 달라진다.That is, when the battery is discharged, the voltages of the respective modules constituting the battery pack when the state of charge is 0 are different.

이러한 배터리 각 모듈의 충전 상태 불균형은 사용할 수 있는 배터리 에너지의 감소를 가져온다.This state of charge imbalance of each battery module results in a reduction in the available battery energy.

따라서, 이러한 충전 상태가 불균형인 배터리 모듈을 교환하지 않고 계속적으로 전기자동차를 운행할 경우, 사용자가 배터리를 충전하여도 그 사용 가능한 에너지는 감소되므로 전기자동차의 주행 거리가 단축되는 문제점이 발생한다.Accordingly, when the electric vehicle is continuously operated without replacing the battery module having an unbalanced state of charge, the usable energy is reduced even when the user charges the battery, thereby reducing the driving distance of the electric vehicle.

본 발명은 이와 같은 문제점을 해결하기 위하여 안출한 것으로, 그 목적은 전기자동차의 운행중 충전 상태가 불균형으로 되는 배터리 모듈의 고장을 판단하여 사용자에게 경보하여 줌으로써 배터리 모듈 고장으로 인한 전기자동차의 주행 거리 감소를 방지하는 데 있다.The present invention has been made to solve the above problems, the object of which is to determine the failure of the battery module is an unbalanced state of charge during the operation of the electric vehicle to alert the user to reduce the mileage of the electric vehicle due to battery module failure To prevent it.

도 1은 본 발명의 일 실시예를 설명하기 위한 전기자동차의 배터리 제어장치를 개략적으로 도시한 블록 구성도이고,1 is a block diagram schematically showing a battery control apparatus of an electric vehicle for explaining an embodiment of the present invention,

도 2는 본 발명의 일 실시예인 전기자동차의 배터리 진단 방법을 개략적으로 도시한 동작 순서도이다.2 is a flowchart illustrating an operation of a battery diagnosis method of an electric vehicle according to an embodiment of the present invention.

상기와 같은 목적을 달성하기 위하여 본 발명은, 배터리 오픈 회로일 경우 각 모듈 전압을 검출하여 그 크기 순서에 따른 히스토리 데이터를 설정하고, 배터리 방전 모드일 경우 소정의 방전 전류에 따른 각 모듈의 전압을 검출하여 그 크기 순서에 따른 히스토리 데이터를 설정한다.In order to achieve the above object, the present invention, in the case of the battery open circuit detects each module voltage and sets the history data according to the magnitude order, in the battery discharge mode, the voltage of each module according to the predetermined discharge current It detects and sets historical data according to the magnitude order.

설정된 히스토리 데이터를 분석하여 소정의 방전 전류에 따른 전압 변동율이 큰 모듈과 그 크기 순서가 변화된 모듈이 있는지를 확인하여 고장 지수를 카운팅하고, 카운팅된 고장 지수가 설정된 기준값 이상이 되면 배터리 모듈 고장이라 판단하여 사용자에게 경보하여 주며, 기준값보다 작으면 상기 단계에서 고장 지수가 카운팅된 모듈을 배터리 충전 모드에서 보충전시켜 등가 화한다.Analyzes the set history data and checks whether there is a module with a large voltage change rate according to a predetermined discharge current and a module whose size order is changed, and counts a failure index. If it is smaller than the reference value, the module counting the failure index in the step is recharged in the battery charging mode to equalize.

이하, 첨부된 도면을 참조로 하여 본 발명에 따른 바람직한 일 실시예를 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1에서 알 수 있는 바와 같이 전기자동차의 배터리 제어장치는 배터리 제어부(10)와 충전부(20), 릴레이 박스(40), 전압 검출부(50), 경보부(60)로 이루어진다.As can be seen in FIG. 1, a battery control apparatus of an electric vehicle includes a battery controller 10, a charging unit 20, a relay box 40, a voltage detector 50, and an alarm unit 60.

배터리 제어부(10)는 각 배터리 모듈(30)의 상태를 파악하며, 그에 따라 배터리(30) 충전 및 등가화를 위한 소정의 신호를 출력한다.The battery controller 10 grasps the state of each battery module 30 and accordingly outputs a predetermined signal for charging and equalizing the battery 30.

충전부(20)는 외부에서 인가되는 전원을 직류 전원으로 변환하여 스위치(S)가 온 되었을 때 배터리(30) 충전을 위한 6KW의 전기적인 신호를 출력하는 제 1정류기(21)와, 외부에서 인가되는 전원을 직류 전원으로 변환하여 배터리(30)의 각 모듈을 보충전 시키기 위한 40W의 전기적인 신호를 출력하는 제 2정류기(22)로 이루어지며, 배터리 제어부(10)의 신호에 따라 배터리(30) 충전 및 배터리(30) 각 모듈을 보충전 시키기 위한 소정의 전기적인 신호를 출력한다.The charging unit 20 converts power applied from the outside into direct current power, and when the switch S is turned on, the first rectifier 21 for outputting an electrical signal of 6KW for charging the battery 30, and applied from the outside. It is composed of a second rectifier 22 for outputting a 40W electrical signal for replenishing each module of the battery 30 by converting the power to a DC power source, the battery 30 in accordance with the signal of the battery controller 10 ) Outputs a predetermined electrical signal for charging and replenishing each module of the battery 30.

릴레이 박스(40)는 배터리(30) 각 모듈 전압 검출선의 양측에 제 2정류기(22)의 + 출력단과 연결된 +접점과, 제 2정류기(22)의 - 출력단과 연결된 -접점이 각각 형성되어 있는 릴레이로 이루어지며, n번째의 배터리(30) 모듈을 보충전 시킬 경우 n-1번째의 릴레이 접점은 +접점에 접속되고, n번째의 릴레이 접점은 -접점에 접속되어 제 2정류기(22)의 전기적인 신호에 의해 n번째의 배터리 모듈을 보충전 시킨다.The relay box 40 includes a + contact connected to the + output terminal of the second rectifier 22 and a-contact connected to the − output terminal of the second rectifier 22 on both sides of each module voltage detection line of the battery 30. In the case of replenishing the nth battery 30 module, the n-1th relay contact is connected to the + contact, and the nth relay contact is connected to the-contact so that the second rectifier 22 The nth battery module is recharged by an electrical signal.

전압 검출부(50)는 릴레이 박스(40)의 접점 선택에 따라 보충전 되는 배터리 모듈의 전압을 검출하여 그에 따른 소정의 신호를 출력한다.The voltage detector 50 detects the voltage of the battery module to be recharged according to the contact selection of the relay box 40 and outputs a predetermined signal accordingly.

경보부(60)는 배터리 제어부(10)의 신호에 따라 동작하여 배터리 모듈(30)의 고장을 사용자가 알 수 있도록 경보하여 준다.The alarm unit 60 operates according to the signal of the battery controller 10 to alert the user to the failure of the battery module 30.

이와 같이 구성된 전기자동차의 배터리 제어장치에서 본 발명의 일 실시예인 전기자동차의 배터리 진단 방법을 첨부된 도면을 참조로 하여 상세히 설명하면 다음과 같다.Referring to the accompanying drawings, a method for diagnosing a battery of an electric vehicle according to an embodiment of the present invention in a battery control apparatus for an electric vehicle configured as described above will be described below.

전기자동차의 운행중 배터리(30) 전원의 입출력이 없는 오픈 회로일 경우(S1), 배터리 제어부(10)는 릴레이 박스(40)의 모듈 전압 검출선을 이용하여 배터리(30)의 각 모듈 전압을 검출하고(S2), 검출된 모듈 전압의 크기에 따른 순서를 확인하여(S3) 히스토리 데이터를 설정한다.In the case of an open circuit having no input / output of the power source of the battery 30 while the electric vehicle is in operation (S1), the battery controller 10 detects the voltage of each module of the battery 30 using the module voltage detection line of the relay box 40. (S2), the sequence according to the magnitude of the detected module voltage is checked (S3), and history data is set.

이후, 사용자가 전기자동차를 운행하여 배터리 방전 모드가 되면(S4) 배터리 제어부(10)는 배터리(30)의 방전 전류를 검출하고, 그 검출된 방전 전류가 C/3(모듈의 사용 가능한 전하량/3)일 때 릴레이 박스(40)의 모듈 전압 검출선을 이용하여 배터리(30)의 각 모듈 전압을 검출한다(S5). 그리고, 검출된 모듈 전압의 크기에 따른 순서를 확인하여(S6) 히스토리 데이터를 설정한다.Then, when the user operates the electric vehicle to enter the battery discharge mode (S4), the battery controller 10 detects the discharge current of the battery 30, and the detected discharge current is C / 3 (the amount of usable charge of the module / In step 3), each module voltage of the battery 30 is detected using the module voltage detection line of the relay box 40 (S5). Then, the sequence according to the magnitude of the detected module voltage is checked (S6) to set the history data.

이때, 배터리 제어부(10)는 설정된 히스토리 데이터를 분석하여 방전 전류 C/3에 따른 모듈의 전압의 순서가 변화되거나 다른 모듈의 전압에 비해 그 변동율이 심한 모듈을 확인하여 충전 상태 불균형 모듈로 설정하고, 고장 가능성을 나타내는 고장 지수를 카운팅한다(SS7).At this time, the battery controller 10 analyzes the set history data and checks a module whose order of voltage is changed according to the discharge current C / 3 or whose change rate is greater than that of other modules, and sets the module as a charge imbalance module. Counts a failure index indicating the likelihood of failure (SS7).

그리고, 배터리 충전을 위하여 사용자가 외부 3상 교류 전원을 인가하여 스위치(S)의 접점이 "온" 되어 배터리 충전 모드가 되면(S11) 배터리 제어부(10)는 충전기(20)의 제 1정류기(21)를 동작시켜 직류로 변환된 전 전력을 이용한 CP 모드와 9A의 정전류를 이용한 CC1 모드, 4.5A의 정전류를 이용한 CC2 모드의 순으로 배터리(30)를 충전시킨다.Then, when the user applies an external three-phase AC power to charge the battery and the contact point of the switch (S) is "on" and the battery charging mode (S11), the battery control unit 10 is the first rectifier of the charger 20 ( 21) to charge the battery 30 in the order of CP mode using the full power converted to direct current, CC1 mode using a constant current of 9A, CC2 mode using a constant current of 4.5A.

이와 동시에, 배터리 제어부(10)는 충전기(20)의 제 2정류기(22)를 통해 직류로 변환된 소정의 정전류로 충전 모드가 9A 또는 4.5A의 정전류를 이용한 CC1 또는 CC2 모드일 때 히스토리 데이터 분석을 통해 충전 상태 불균형으로 설정된 모듈을 보충전시켜 충전 상태를 등가화 시킨다(S12).At the same time, the battery controller 10 analyzes the historical data when the charging mode is a CC1 or CC2 mode using a constant current of 9A or 4.5A with a predetermined constant current converted to DC through the second rectifier 22 of the charger 20. Through replenishment of the module set to the unbalanced state of charge through the equalize state of charge (S12).

이후, 상기와 같이 오픈 회로일 때(S1)의 배터리 모듈 전압을 검출하여(S2) 그 크기에 따라 히스토리 데이터를 설정하고(S3), 전기자동차 주행에 따른 배터리 방전 모드(S4)에서 방전 전류가 C/3일 때의 모듈 전압을 검출하여(S5) 그 크기에 따라 히스토리 데이터를 설정한 다음(S6), 히스토리 데이터를 분석하여 상기와 같이 방전 전류 C/3에 따른 모듈의 전압의 순서가 변화되거나 다른 모듈의 전압에 비해 그 변동율이 심한 모듈을 확인하여 충전 상태 불균형 모듈로 설정하고, 고장 가능성을 나타내는 고장 지수를 카운팅한다(SS7).Thereafter, as described above, when the battery module voltage in the open circuit (S1) is detected (S2) and history data is set according to the size (S3), the discharge current in the battery discharge mode (S4) according to the driving of the electric vehicle is increased. The module voltage at C / 3 is detected (S5) and history data is set according to the magnitude (S6). Then, the history data is analyzed to change the order of the module voltages according to the discharge current C / 3 as described above. Or the module having a high rate of change compared to the voltage of another module is set as an unbalanced state of charge module, and a failure index indicating a possible failure is counted (SS7).

이와 같은 동작중 배터리 제어부(10)는 카운팅된 고장 지수를 설정된 기준값과 비교하여(S8) 기준값 이상이 되면 즉, 보충전 실시 후에도 지속적으로 충전 상태가 불균형인 모듈이 발생하면 배터리 모듈이 고장이라 판단하고(S9), 경보부(60)를 통해 운전자가 고장 모듈을 알 수 있도록 경보하여 준다(S10).During this operation, the battery controller 10 compares the counted failure index with a set reference value (S8), and when the reference value is higher than the reference value, that is, if a module having an unbalanced state of charge continues even after replenishment is performed, the battery module is determined to be a failure. And (S9), through the alarm unit 60 gives a warning so that the driver knows the faulty module (S10).

이와 같이 본 발명은 전기자동차의 운행중 충전 상태가 불균형인 배터리 모듈의 고장을 사용자에게 경보하여 배터리 고장 모듈을 조기에 교체할 수 있도록 함으로써 배터리 모듈 고장으로 인한 배터리의 사용 가능 에너지의 감소를 방지하여 전기자동차의 주행 거리를 연장할 수 있다.As such, the present invention alerts the user to a failure of a battery module having an unbalanced state of charge during operation of an electric vehicle, thereby enabling the battery failure module to be replaced early, thereby preventing a decrease in usable energy of the battery due to the battery module failure. The mileage of the car can be extended.

Claims (1)

배터리 오픈 회로일 경우 각 모듈 전압을 검출하여 그 크기 순서에 따른 히스토리 데이터를 설정하는 단계와;Detecting a voltage of each module in the case of a battery open circuit and setting history data according to the magnitude order; 배터리 방전 모드일 경우 소정의 방전 전류에 따른 각 모듈의 전압을 검출하여 그 크기 순서에 따른 히스토리 데이터를 설정하는 단계와;Detecting a voltage of each module according to a predetermined discharge current in the battery discharge mode and setting history data according to the magnitude order; 상기 단계에서 설정된 히스토리 데이터를 분석하여 소정의 방전 전류에 따른 전압 변동율이 큰 모듈과 그 크기 순서가 변화된 모듈이 있는지를 확인하여 고장 지수를 카운팅하는 단계와;Analyzing the history data set in the step to determine whether there is a module having a large voltage change rate according to a predetermined discharge current and a module whose size order is changed, and counting a failure index; 상기 단계에서 카운팅된 고장 지수가 설정된 기준값 이상이 되면 배터리 모듈 고장이라 판단하여 사용자에게 경보하여 주며, 기준값보다 작으면 상기 단계에서 고장 지수가 카운팅된 모듈을 배터리 충전 모드에서 보충전시켜 등가화 하는 단계로 이루어지는 것을 특징으로 하는 전기자동차의 배터리 진단 방법.If the failure index counted in the step is more than the set reference value is determined to be a battery module failure and alerts the user.If less than the reference value, the step of refilling and equalizing the module counting the failure index in the battery charging mode in the step Battery diagnostic method of an electric vehicle, characterized in that consisting of.
KR1019970073344A 1997-12-24 1997-12-24 Battery diagnose method of electric vehicle KR100256732B1 (en)

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KR20220057861A (en) 2020-10-30 2022-05-09 주식회사 퀀텀솔루션 Battery management system and method for battery performance diagnosis
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