KR20130134397A - Method for determining state of health of battery - Google Patents

Method for determining state of health of battery Download PDF

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KR20130134397A
KR20130134397A KR1020120057867A KR20120057867A KR20130134397A KR 20130134397 A KR20130134397 A KR 20130134397A KR 1020120057867 A KR1020120057867 A KR 1020120057867A KR 20120057867 A KR20120057867 A KR 20120057867A KR 20130134397 A KR20130134397 A KR 20130134397A
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South Korea
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battery
vehicle
battery charge
aging
value
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KR1020120057867A
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Korean (ko)
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KR101349015B1 (en
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임영철
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현대자동차주식회사
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    • 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
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/12—Speed
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/14—Acceleration
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • 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
    • B60L2250/00—Driver interactions
    • B60L2250/10—Driver interactions by alarm
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

The present invention relates to a vehicle battery deterioration determination method. More specifically, a vehicle battery deterioration determination method given in the present invention monitors the charging current and the charging time of a battery and determines the deterioration of the battery. To do so, the method includes a step of determining whether the charge guarantee value of the battery, the status of the output signal of an alternator, the speed of a vehicle, the acceleration status of the vehicle meet the battery deterioration determination conditions; a step of, if the battery deterioration determination conditions are met, monitoring the charging current and the charging time of the battery from the charge guarantee value to a target value of the battery; and a step of determining the deterioration of the battery based on the monitored result. [Reference numerals] (AA) Start;(BB) Battery SOC, vehicle speed, alternator output signal, vehicle acceleration/deceleration;(CC) SOC >= 85,% V <= 120km/h, 10% <= ALT Duty <= 80%, no acceleration/deceleration;(DD) Charging current, battery charging time (80→85%);(EE) Charging current <= 2A?;(FF) Charging current <= 2hr?;(GG) Determine the deterioration of the battery;(HH) Follow-up measures

Description

차량용 배터리 노후화 판정 방법{Method for determining state of health of battery} Vehicle aging determination method for vehicles {Method for determining state of health of battery}

본 발명은 차량용 배터리 노후화 판정 방법에 관한 것으로서, 더욱 상세하게는 배터리 충전전류 및 충전시간을 모니터링하여, 배터리 센서없이도 배터리의 노후화를 판정할 수 있도록 한 차량용 배터리 노후화 판정 방법에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle battery aging determination method. More particularly, the present invention relates to a vehicle battery aging determination method for monitoring battery charge current and charging time so that battery aging can be determined without a battery sensor.

차량용 배터리의 최적 성능을 보장하기 위하여 배터리의 효율적인 관리 및 신뢰성이 요구되고 있고, 이러한 요구에 따라 배터리의 충전상태 및 노후상태 등을 모니터링하는 시스템이 적용되고 있다.In order to ensure the optimum performance of the vehicle battery, efficient management and reliability of the battery is required, and a system for monitoring the state of charge and aging of the battery is applied according to such a request.

종래의 배터리 노후상태를 판정하는 방법을 첨부한 도 를 참조로 살펴보면 다음과 같다.Referring to the accompanying drawings, a method for determining a conventional battery old state is as follows.

종래의 배터리 노후상태를 나타내는 SOH(state of health)값이 배터리 충전량 감지센서를 이용하여 판정되며, 이를 위해 배터리 충전량 감지센서에서 배터리의 만충전 용량을 주기적으로 측정하여 제어기로 전송하면 제어기내의 메모리에 측정 데이타가 저장된다.A conventional SOH (state of health) value indicating a battery aging condition is determined by using a battery charge sensor. For this purpose, the battery charge sensor periodically measures the full charge capacity of the battery and transmits it to the controller. The measurement data is saved.

즉, 메모리의 각 셀 인덱스(Cell index: 0~n)에 만충전 용량을 매회 측정한 SOH(state of health)값이 순서대로 기록되며, 전체 셀 인덱스에 기록이 완료되면 기록된 SOH값들 중 최대값을 배터리 노후상태를 나타내는 SOH값으로 판정한다(예를 들어, 도 6의 (a)에서 보듯이 최대값인 90%를 SOH값으로 판정함). That is, the SOH (state of health) value measured every time the full charge capacity is sequentially recorded in each cell index (0 ~ n) of the memory, and when the recording is completed in the entire cell index, the maximum of the recorded SOH values The value is determined as the SOH value indicating the battery aging state (for example, as shown in Fig. 6A), the maximum value 90% is determined as the SOH value.

이때, 메모리의 각 셀 인덱스가 모두 풀(fulle)로 기록된 경우, 이후의 배터리 충전량 감지센서의 SOH 측정값은 셀 인덱스에 기록된 가장 오래된 값에 덮어쓰기(overwritten)된다(예를 들어, 도 6의 (b)에서 보듯이 메모리 셀 인덱스의 제로(0)칸에 85%로 덮어쓰기됨).At this time, when each cell index of the memory is recorded in a full, the SOH measurement value of the subsequent battery charge sensor is overwritten with the oldest value recorded in the cell index (for example, FIG. As shown in 6 (b), the zero (0) field of the memory cell index is overwritten by 85%).

이와 같이, 배터리 충전용량을 감지하는 센서를 이용하여 SOH값을 메모리에 저장 기록하고, 그 기록된 값들 최대값을 배터리 노후상태 판정을 위한 SOH값으로 결정된다.In this way, the SOH value is stored and recorded in the memory using a sensor for sensing the battery charge capacity, and the maximum value of the recorded values is determined as the SOH value for determining the battery deterioration state.

그러나, 메모리에 기록된 최대 SOH값을 배터리 노후 판정값으로 사용함에 따라 배터리 노후 판정에 대한 신뢰성이 떨어지는 단점이 있다.However, the use of the maximum SOH value recorded in the memory as the battery aging determination value has a disadvantage in that the reliability of the battery aging determination is inferior.

즉, 차량의 주행 조건 및 배터리의 충전 조건에 따라, 배터리의 만충전이 매번 안 될 경우도 발생할 수 있고, 배터리의 만충전 용량이 달라지기 때문에 최대 SOH값을 배터리의 노후 판정 기준으로 이용하는 것은 모호한 점에 있고, 이에 배터리 노후 판정에 대한 신뢰성이 떨어지는 단점이 있다.
In other words, depending on the driving conditions of the vehicle and the charging conditions of the battery, it may occur when the battery is not fully charged every time, and because the full charge capacity of the battery is different, it is ambiguous to use the maximum SOH value as a criterion for determining the age of the battery. In this case, there is a disadvantage in that the reliability of the battery age determination is inferior.

본 발명은 배터리의 노후화가 진행되면 만충전되는 용량도 감소하고 일정 SOC 이상에서는 알터네이터가 충분히 발전할 수 있는 여력이 있는 조건에서도 충전이 거의 되지 않는 특성을 감안하여 안출한 것으로서, 기존의 배터리 센서없이 배터리 충전전류 및 충전시간 등의 조건들을 모니터링하여 배터리 노후화를 판정할 수 있도록 한 차량용 배터리 노후화 판정 방법을 제공하는데 그 목적이 있다.
The present invention has been made in view of the characteristics that the charging capacity is also reduced as the aging of the battery is reduced and the charging is hardly possible even under a condition in which the alternator can sufficiently generate power above a certain SOC, without a conventional battery sensor It is an object of the present invention to provide a vehicle battery aging determination method for determining battery aging by monitoring conditions such as battery charging current and charging time.

상기한 목적을 달성하기 위한 본 발명은: 배터리 충전량 보증값과, 알터네이터 출력신호 상태와, 차량속도 및 가감속 상태가 배터리 노후화 판정 조건에 만족하는지 여부를 결정하는 단계와; 배터리 노후화 판정 조건을 만족하면, 배터리 충전량 보증값에서 목표량까지 배터리 충전전류 및 배터리 충전시간을 모니터링하는 단계와; 모니터링된 결과를 기반으로 배터리 노후화 여부를 판정하는 단계; 를 포함하는 것을 특징으로 하는 차량용 배터리 노후화 판정 방법을 제공한다.The present invention for achieving the above object comprises the steps of: determining whether the battery charge guarantee value, the alternator output signal state, the vehicle speed and acceleration / deceleration state satisfy the battery aging determination condition; Monitoring battery charge current and battery charge time from a battery charge guarantee value to a target amount if the battery aging determination condition is satisfied; Determining whether the battery is aging based on the monitored result; It provides a vehicle battery aging determination method comprising a.

본 발명의 바람직한 구현예로서, 상기 배터리 노후화 판정 조건으로서, ⅰ)배터리 충전량이 배터리 충전량 보증값(SOC) 이상이고, ⅱ)알터네이터의 출력신호가 발전 가능한 듀티범위로 출력되며, ⅲ)차속이 임계속도 이하이면서 가감속이 없는 조건을 모두 만족시켜야 하는 것을 특징으로 한다.As a preferred embodiment of the present invention, as the battery aging determination condition, i) the battery charge is more than the battery charge guarantee value (SOC), ii) the output signal of the alternator is output in a duty range capable of generation, i) the vehicle speed is critical It is characterized in that all of the conditions below the speed and no acceleration / deceleration are satisfied.

본 발명의 바람직한 구현예로서, 상기 배터리 노후화 여부를 판정하는 단계는: 배터리 충전량 보증값에서 목표로 하는 배터리 충전 목표량까지 배터리 충전전류가 임계전류값 이하이면서 배터리 충전시간이 임계시간 이상 걸리게 되면, 배터리가 노후된 것으로 판정하는 것을 특징으로 한다.In a preferred embodiment of the present invention, the step of determining whether the battery is aging: when the battery charge current is less than the threshold current value from the battery charge guarantee value to the target battery charge target value, the battery charge time is longer than the threshold time, the battery Is determined to be old.

바람직하게는, 상기 배터리가 노후된 것으로 판정되면, 클러스터를 통한 경고등을 점등하여 운전자 경고를 하는 단계가 더 진행되는 것을 특징으로 한다.
Preferably, if it is determined that the battery is old, the step of warning the driver by turning on the warning light through the cluster is characterized in that further proceeds.

상기한 과제 해결 수단을 통하여, 본 발명은 다음과 같은 효과를 제공한다.Through the above-mentioned means for solving the problems, the present invention provides the following effects.

본 발명에 따르면, 차량용 배터리에 대한 노후화 판정을 현재 배터리 충전량을 비롯하여 차량의 주행조건(차속 및 가감속)과 알터네이터의 출력신호 상태 등과 같은 실차 기반 조건들을 이용하여 판정할 수 있도록 함으로써, 기존에 배터리 충전량 감지센서와 제어기의 메모리 사용을 배제할 수 있고, 그에 따라 배터리 노후화 판정 기능을 위한 원가 절감을 실현할 수 있다.
According to the present invention, it is possible to determine the aging determination for a vehicle battery using actual vehicle-based conditions such as the current battery charge, the vehicle driving conditions (vehicle speed and acceleration and deceleration) and the output signal state of the alternator, thereby making The memory usage of the charge sensor and controller can be eliminated, thereby reducing the cost for the battery aging determination function.

도 1은 본 발명에 따른 차량용 배터리 노후화 판정 방법을 위한 구성을 보여주는 개략도,
도 2는 본 발명에 따른 차량용 배터리 노후화 판정 방법을 나타내는 로직 흐름도,
도 3은 본 발명에 따른 차량용 배터리 노후화 판정 방법을 설명하는 순서도,
도 4 및 도 5는 본 발명에 따른 차량용 배터리 노후화 판정 방법의 실험예 결과를 나타낸 파형도,
도 6은 종래의 배터리 노후화 판정 방법을 설명하는 개략도.1 is a schematic view showing a configuration for a vehicle battery aging determination method according to the present invention,
2 is a logic flow diagram illustrating a vehicle battery aging determination method according to the present invention;
3 is a flowchart illustrating a vehicle battery aging determination method according to the present invention;
4 and 5 are waveform diagrams showing experimental results of the vehicle battery aging determination method according to the present invention;
6 is a schematic view illustrating a conventional battery aging determination method.

이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 기존에 배터리 센서 및 제어기의 메모리를 사용하던 것과 달리, 실차 상태의 주행조건(차속 및 가감속)과 배터리 충전을 위한 발전 기능을 하는 알터네이터의 출력신호 상태 등과 같이 실차 상태의 조건들을 이용하여 배터리 노후화를 판정할 수 있도록 한 점에 주안점이 있다.The present invention uses the conditions of the actual vehicle state, such as the driving conditions (vehicle speed and acceleration and deceleration) of the actual vehicle state and the output signal state of the alternator which functions to generate power for charging the battery, unlike the conventional memory of the battery sensor and the controller. The main point is that the battery aging can be determined.

이를 위해, 배터리 충전량 보증값과, 알터네이터 출력신호 상태와, 차량속도 및 가감속 상태 등과 같은 실차 상태의 조건들을 배터리 노후화 판정 조건으로 채택된다.To this end, the conditions of the battery charge guarantee value, the alternator output signal state, and the actual vehicle state such as the vehicle speed and acceleration / deceleration state are adopted as battery aging determination conditions.

이러한 배터리 노후화 판정 조건이 선정된 상태에서 배터리 노후화 판정을 위한 선행 단계로서, 배터리 충전량 보증값과, 알터네이터 출력신호 상태와, 차량속도 및 가감속 상태 등이 배터리 노후화 판정 조건에 만족하는지 여부를 결정하는 단계가 상위제어기(10 : 예를 들어, 엔진 ECU)에서 진행된다.As a preceding step for determining battery aging in the state where the battery aging determination condition is selected, it is determined whether the battery charge guarantee value, the alternator output signal state, the vehicle speed and the acceleration / deceleration state, etc. satisfy the battery aging determination condition. The step proceeds at the upper controller 10 (e.g., engine ECU).

즉, 첨부한 도 1에 도시된 바와 같이 차속센서 및 가속도센서(14)로부터의 차량의 현재 차속 및 가감속 여부 신호, 알터네이터(16)로부터의 출력신호, 배터리 충전량 등 배터리에 대한 전반적인 관리 제어를 위한 하위제어기(12: 예를 들어, EBS)로부터의 현재 배터리 충전량(SOC) 등과 같은 정보가 상위제어기(10)에 입력됨으로써, 상위제어기(10)에서 배터리 노후화 판정 조건에 만족하는지 여부를 결정하는 로직이 진행된다.That is, as shown in FIG. 1, overall management and control of the battery, such as a current vehicle speed and acceleration / deceleration signal of the vehicle from the vehicle speed sensor and the acceleration sensor 14, an output signal from the alternator 16, and a battery charge amount, may be performed. For example, information such as the current battery charge amount SOC from the lower controller 12 is inputted to the upper controller 10, thereby determining whether the upper controller 10 satisfies the battery aging determination condition. The logic goes on.

보다 상세하게는, 첨부한 도 2 및 도 3을 참조하면, ⅰ)배터리 충전량이 배터리 충전량 보증값(SOC) 이상, 즉 실차량에서 배터리 충전 상태가 보증되는 SOC값으로서 배터리 충전량 보증값(SOC)이 80% 이상이고, ⅱ)알터네이터의 출력신호가 발전 가능한 듀티범위, 즉 10%~80% 범위의 듀티비 범위로 출력되며, ⅲ)차속이 임계속도(바람직하게는 정속주행을 위한 120km/h 이하) 이하이면서 가감속이 이루어지지 않는 상태, 등을 모두 만족할 때 배터리 노후화 판정 조건을 만족하는 것으로 결정하게 된다.More specifically, referring to FIG. 2 and FIG. 3, i) battery charge amount is equal to or greater than the battery charge guarantee value (SOC), that is, SOC value in which the battery charge state is guaranteed in a real vehicle. 80% or more, ii) the output signal of the alternator is output in the duty range that can be developed, that is, in the duty ratio range of 10% to 80%, and i) the vehicle speed is a critical speed (preferably 120 km / h for constant speed driving). It is determined that the battery aging determination condition is satisfied when all of the following conditions are satisfied while the acceleration and deceleration are not performed.

이렇게 배터리 노후화 판정 조건을 만족하면, 배터리 충전량 보증값에서 목표량까지 배터리 충전전류 및 배터리 충전시간을 모니터링하는 단계가 하위제어기에서 진행되어 상위제어기로 그 정보가 전송된다.When the battery aging determination condition is satisfied as described above, the monitoring of the battery charging current and the battery charging time from the battery charge guarantee value to the target amount is performed in the lower controller and the information is transmitted to the upper controller.

예를 들어, 첨부한 도 3에서 보듯이 배터리 충전량 보증값으로서 SOC가 80%이고, 배터리 충전 목표량이 SOC 85%이면, SOC 80% → SOC 85% 가 될 때까지 배터리 충전전류 및 배터리 충전시간을 모니터링하게 된다.For example, as shown in FIG. 3, when the SOC is 80% and the battery charge target amount is 85%, the battery charge current and the battery charge time are changed from SOC 80% to SOC 85%. Will be monitored.

이어서, 위와 같이 모니터링된 결과를 기반으로 배터리 노후화 여부를 판정할 수 있다.Subsequently, it may be determined whether the battery is old based on the monitored result as described above.

즉, 배터리 노후화 여부를 판정하는 단계는 배터리 충전량 보증값(예를들어, SOC 80%)에서 목표로 하는 배터리 충전 목표량(예를 들어, SOC 85%)까지 배터리 충전전류 및 충전시간을 모니터링하되, 배터리 충전전류가 임계전류값 이하이면서 배터리 충전시간이 임계시간 이상 걸리게 되면, 배터리가 노후된 것으로 판정하게 된다.That is, the step of determining whether the battery is aging monitors the battery charge current and charging time from the battery charge guarantee value (for example, SOC 80%) to the target battery charge target amount (for example, SOC 85%), When the battery charge current is less than the threshold current value and the battery charge time takes more than the threshold time, it is determined that the battery is old.

예를 들어, 배터리 충전전류가 2A 이하로 낮고, 배터리 충전시간이 2시간 이상 너무 오래 걸리게 되면, 배터리가 노후된 것으로 판정하게 된다.For example, when the battery charge current is low, 2A or less, and the battery charge time is too long for 2 hours or more, it is determined that the battery is old.

본 발명의 시험예 1로서 MPI ISG 차량에 노화된 배터리를 탑재하여 배터리 충전량 보증값(SOC 84%)에서 목표로 하는 배터리 충전 목표량(SOC 88%)까지 상기와 같은 방법으로 노후화 판정 시험을 하였고, 또한 본 발명의 시험예 2로서 감마 gdi 1.6차량에 신규 배터리를 탑재하여 배터리 충전량 보증값(SOC 86%)에서 목표로 하는 배터리 충전 목표량(SOC 90%)까지 상기와 같은 방법으로 노후화 판정 시험을 하였으며, 그 결과는 각각 첨부한 도 4 및 도 5의 파형도에 도시된 바와 같다.As the test example 1 of the present invention, an aging battery was mounted in an MPI ISG vehicle, and the aging determination test was performed in the same manner from the guaranteed battery charge guarantee value (SOC 84%) to the target battery charge target amount (SOC 88%). In addition, as the test example 2 of the present invention, a new battery was mounted in the gamma gdi 1.6 vehicle, and the aging determination test was performed in the same manner from the guaranteed battery charge guarantee value (SOC 86%) to the target battery charge target amount (SOC 90%). The results are as shown in the waveform diagrams of FIGS. 4 and 5, respectively.

시험예 1의 경우, 도 4에서 보듯이 배터리 충전 상태가 4%(84%->88%) 증가하는 시간이 3752s(초)로 배터리 노화 상태임을 알 수 있었고, SOC 84% 상태에서도 배터리 충전 전류는 2A 수준으로 낮아 배터리 노화에 의하여 충전이 이루어져 불량 상태임을 알 수 있었다.In Test Example 1, as shown in FIG. 4, the battery charging state increased by 4% (84%-> 88%) to 3752 s (seconds). Was lowered to 2A level and was found to be in a bad state due to charging by battery aging.

시험예 2의 경우, 도 5에서 보듯이 배터리 충전 상태가 4%(86%->90%) 증가하는 시간이 321s(초)로 배터리 충전상태가 양호하고, 배터리 충전전류는 최소 22A 이상으로 충전전류 상태도 양호한 것으로 측정되었다.In Test Example 2, as shown in FIG. 5, the battery charge state is increased to 321 s (seconds) for a 4% (86% to 90%) increase in battery charge state, and the battery charge current is charged to at least 22A. The current state was also measured to be good.

이상과 같이, 실차량에서 배터리 충전 상태(SOC)가 일정 이상이고, 차량 가감속이 없는 아이들 혹은 정속 조건에서 알터네이터 출력은 거의 일정하게 유지되는 조건을 만족할 때, 배터리 충전전류 및 배터리 충전시간을 지속적으로 모니터링하여 배터리 충전 전류 및 충전 시간이 임계값을 만족하는 앤드(AND) 조건이 된 상태가 되고, 이러한 상태가 일정시간(delay time)을 경과하면 배터리가 노후화된 것으로 판정함으로써, 기존에 배터리 충전량 감지센서와 제어기의 메모리 사용을 배제할 수 있고, 그에 따라 배터리 노후화 판정 기능을 위한 원가 절감을 실현할 수 있다.As described above, the battery charge current and the battery charge time are continuously maintained when the state of charge (SOC) of the actual vehicle is higher than a certain level, and the condition that the alternator output is maintained almost constant in the idle or constant speed condition without vehicle acceleration / deceleration is satisfied. By monitoring, the battery charge current and charge time become an AND condition that satisfies the threshold value, and when this state passes the delay time, it is determined that the battery is old, thereby detecting the battery charge amount. The memory usage of the sensors and controllers can be eliminated, thereby reducing the cost for the battery aging determination function.

한편, 배터리가 노후된 것으로 판정되면, 상위제어기의 제어 명령에 따라 클러스터를 통한 경고등을 점등하여 운전자 경고를 하는 단계가 더 진행될 수 있고, 그에 따라 운전자로 하여금 배터리 교체를 유도할 수 있다.
On the other hand, if it is determined that the battery is old, the step of turning on the warning light through the cluster according to the control command of the upper controller to the driver warning can be further proceeded, thereby inducing the driver to replace the battery.

Claims (4)

배터리 충전량 보증값과, 알터네이터 출력신호 상태와, 차량속도 및 가감속 상태가 배터리 노후화 판정 조건에 만족하는지 여부를 결정하는 단계와;
배터리 노후화 판정 조건을 만족하면, 배터리 충전량 보증값에서 목표량까지 배터리 충전전류 및 배터리 충전시간을 모니터링하는 단계와;
모니터링된 결과를 기반으로 배터리 노후화 여부를 판정하는 단계;
를 포함하는 것을 특징으로 하는 차량용 배터리 노후화 판정 방법.
Determining whether the battery charge guaranteed value, the alternator output signal state, the vehicle speed and the acceleration / deceleration state satisfy the battery aging determination condition;
Monitoring battery charge current and battery charge time from a battery charge guarantee value to a target amount if the battery aging determination condition is satisfied;
Determining whether the battery is aging based on the monitored result;
Vehicle aging determination method for a vehicle comprising a.
청구항 1에 있어서,
상기 배터리 노후화 판정 조건으로서,
ⅰ)배터리 충전량이 배터리 충전량 보증값(SOC) 이상이고, ⅱ)알터네이터의 출력신호가 발전 가능한 듀티범위로 출력되며, ⅲ)차속이 임계속도 이하이면서 가감속이 없는 조건을 모두 만족시켜야 하는 것을 특징으로 하는 차량용 배터리 노후화 판정 방법.
The method according to claim 1,
As the battery aging determination condition,
Ⅰ) The battery charge is more than the SOC, ii) The output signal of the alternator is output within the duty range, ⅲ) The vehicle speed must meet all of the conditions without acceleration or deceleration. The vehicle battery aging determination method.
청구항 1에 있어서,
상기 배터리 노후화 여부를 판정하는 단계는:
배터리 충전량 보증값에서 목표로 하는 배터리 충전 목표량까지 배터리 충전전류가 임계전류값 이하이면서 배터리 충전시간이 임계시간 이상 걸리게 되면, 배터리가 노후된 것으로 판정하는 것을 특징으로 하는 차량용 배터리 노후화 판정 방법.
The method according to claim 1,
The determining of whether the battery is aging is:
And determining that the battery is old when the battery charge current is less than the threshold current value and the battery charge time takes longer than the threshold time from the battery charge guarantee value to the target battery charge target amount.
청구항 1에 있어서,
상기 배터리가 노후된 것으로 판정되면, 클러스터를 통한 경고등을 점등하여 운전자 경고를 하는 단계가 더 진행되는 것을 특징으로 하는 차량용 배터리 노후화 판정 방법.The method according to claim 1,
If it is determined that the battery is old, the step of warning the driver by lighting a warning light through the cluster is further performed.
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