KR20030092808A - a method for calculation a battery state of charge in electric vehicle - Google Patents
a method for calculation a battery state of charge in electric vehicle Download PDFInfo
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- KR20030092808A KR20030092808A KR1020020030636A KR20020030636A KR20030092808A KR 20030092808 A KR20030092808 A KR 20030092808A KR 1020020030636 A KR1020020030636 A KR 1020020030636A KR 20020030636 A KR20020030636 A KR 20020030636A KR 20030092808 A KR20030092808 A KR 20030092808A
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- battery
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000004364 calculation method Methods 0.000 title claims description 11
- 230000032683 aging Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000007429 general method Methods 0.000 description 1
Classifications
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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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- 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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
Abstract
Description
본 발명은 전기 자동차에 관한 것으로서, 더욱 상세하게는 전기 자동차의 배터리 건강상태(SOH : State Of Health)를 고려한 배터리 충전상태(SOC : State Of Charge)를 계산 방법에 관한 것이다.The present invention relates to an electric vehicle, and more particularly, to a method of calculating a state of charge (SOC) in consideration of a battery state of health (SOH) of an electric vehicle.
전기 자동차에서 배터리의 SOC를 계산하는 일반적인 방법 중 하나는 단위 시간에 사용한 방전 전류량(Used_Ah)과 방전 전류에 고율방전 용량(High_Rate_Discharge_Ah)을 구하여 하기의 수학식 1에서와 같이 계산하는 것이다.One of the general methods for calculating the SOC of a battery in an electric vehicle is to calculate the discharge current amount (Used_Ah) used in a unit time and the high rate discharge capacity (High_Rate_Discharge_Ah) in the discharge current as shown in Equation 1 below.
이 때, 전류량은 단위 시간당 사용한 전류의 합이며 고율 방전용량은 단위 시간당 사용된 평균 전류의 고율방전용량에 해당한다. 상기에서 고율 방전용량은 배터리 정전류 방전 시험으로부터 도 1과 같이 나온다.At this time, the current amount is the sum of the currents used per unit time, and the high rate discharge capacity corresponds to the high rate discharge capacity of the average current used per unit time. The high rate discharge capacity is as shown in Figure 1 from the battery constant current discharge test.
도 2는 종래에 사용하던 SOC 계산 로직선도로 전류를 입력하여 충전 또는 방전인지를 판단한 후, 도 1의 방전전류에 따른 잔류 용량을 적용하여 상기 수학식 1과 같이 계산되었다.Figure 2 is a conventional SOC calculation logic diagram using a current input to determine whether the charge or discharge, it was calculated as shown in Equation 1 by applying the residual capacity according to the discharge current of FIG.
상기에서 SOC는 SOH에 따라 배터리 효율이 변화한다.In the SOC, the battery efficiency varies depending on the SOH.
즉, 상기 SOH는 배터리 온도, 벙전 전류크기, 노후화 등에 의해 결정되어 지며 배터리 전체의 효율을 결정하는 중요한 파라미터이다.That is, the SOH is determined by battery temperature, discharge current size, aging, etc. and is an important parameter for determining the efficiency of the battery as a whole.
그러나, 종래 기술의 경우 배터리 전류에 따른 전류량 효율만을 고려하였기에 SOC 계산 오차를 발생시키는 근본적인 원인이 되는 문제점이 있다.However, in the prior art, since only the current amount efficiency according to the battery current is considered, there is a problem that is a fundamental cause of SOC calculation error.
따라서, 본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로, 순수 및 하이브리드 전기 자동차 배터리 제어기의 배터리 충전상태(SOC) 계산 정밀도 향상으로 잔존용량 및 잔존 주행거리 예측 신뢰성 향상 및 배터리 손상으로 인한 수리 작업을 최소화시킬 수 있는 전기 자동차의 배터리 충전상태 계산 방법을 제공하기 위한 것이다.Accordingly, an object of the present invention is to solve the above-mentioned problems, and to improve the battery state of charge (SOC) calculation accuracy of pure and hybrid electric vehicle battery controllers to improve the remaining capacity and the remaining mileage prediction reliability and repair work due to battery damage It is to provide a method of calculating the battery charge state of an electric vehicle that can minimize the.
도 1은 종래 전기 자동차의 배터리 충전상태 계산 로직 선도이고,1 is a logic diagram of a battery state of charge calculation of a conventional electric vehicle,
도 2는 본 발명에 따른 전기 자동차의 배터리 충전상태 계산 장치 구성 블록도 이고,2 is a block diagram of a device for calculating a state of charge of a battery of an electric vehicle according to the present invention;
도 3은 본 발명에 적용되는 전기 자동차의 배터리 충전상태 계산 로직 선도이다.3 is a logic diagram of a battery state of charge calculation of an electric vehicle according to the present invention.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
100 : 배터리 상태 검출장치 110 : 배터리 전류 검출부100: battery state detection device 110: battery current detection unit
120 : 배터리 온도 검출부 130 : 배터리 모드 검출부120: battery temperature detector 130: battery mode detector
200 : 제어장치200: control device
상기한 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,
배터리의 충, 방전 상태에 따라 방전시 단위시간에 사용한 방전 전류량과 방전 전류에 고율 방전 용량을 연산하여 전기 자동차의 배터리 충전상태를 산출하는 방법에 있어서, 상기 배터리 충전상태를 배터리 온도, 방전 전류 크기, 배터리 노후화를 곱하여 산출되는 실시간 배터리 효율에 배터리 초기 용량을 곱하여 실시간 방전 가용 용량이 고려된 배터리 건강상태에 배터리의 충, 방전 상태에 따라 방전시 단위시간에 사용한 방전 전류량 연산하여 산출하는 것을 특징으로 한다.A method of calculating a battery charge state of an electric vehicle by calculating a high rate discharge capacity based on a discharge current amount and a discharge current used in a unit time at the time of discharging according to a charge and discharge state of a battery, wherein the battery charge state is determined by a battery temperature and a discharge current magnitude. And multiplying the initial battery capacity by the real time battery efficiency, which is calculated by multiplying the battery aging, and calculating the amount of discharge current used in unit time at the time of discharging according to the state of charge and discharge of the battery to the battery health state considering the real-time discharge available capacity. do.
이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 2는 본 발명에 따른 전기 자동차의 배터리 충전상태 계산 장치 구성 블록도 이고, 도 3은 본 발명에 적용되는 전기 자동차의 배터리 충전상태 계산 로직 선도이다.FIG. 2 is a block diagram illustrating an apparatus for calculating a battery charge state of an electric vehicle according to the present invention, and FIG. 3 is a logic diagram of a battery state of charge calculation of an electric vehicle according to the present invention.
도 2에 도시되어 있듯이, 전기 자동차의 배터리 충전상태 계산장치는 차량의 충/방전상태 변화에 따라 가변되는 배터리 전류, 배터리 온도, 배터리의 모든 상태 등 배터리의 상태를 검출하는 배터리 상태 검출장치(100)와;As shown in FIG. 2, the battery charge state calculating device of the electric vehicle may detect a battery state, such as battery current, battery temperature, and all states of the battery, which vary according to a change in the charge / discharge state of the vehicle. )Wow;
상기 배터리 상태 검출장치(100)에서 검출되어 인가되는 배터리 전류, 배터리 온도, 배터리의 모든 상태 등을 입력받아, 배터리 충/방전 전류에 따른 전류 용량 효유로가 배터리 온도와 노후화 계수를 곱하여 배터리의 건강상태를 구한 후, 실시간 배터리 효율을 산출한 다음, 상기 배터리 효율에 배터리 초기 용량을 곱셈 연산하여 산출되는 배터리 건강상태인 실시간 방전 가용용량이 고려된 배터리 충전상태를 연산하는 제어장치(200)로 이루어져 있다.Receives the battery current, battery temperature, and all the states of the battery detected and applied by the battery state detection device 100, and the current capacity efficiency channel according to the battery charge / discharge current is multiplied by the battery temperature and the aging coefficient to improve the health of the battery. After calculating the state, and calculates the real-time battery efficiency, and then the control device 200 for calculating the state of charge of the battery considering the real-time discharge available capacity of the battery health state calculated by multiplying the initial battery capacity of the battery efficiency have.
상기한 구성으로 이루어진 전기 자동차의 배터리 충전상태(SOC) 계산 방법을 첨부한 도 3을 참조하여 설명한다.A method of calculating a battery charge state (SOC) of an electric vehicle having the above configuration will be described with reference to FIG. 3.
전기 자동차에 시동이 걸리면, 배터리 상태 검출장치(100)는 배터리의 전류, 배터리 온도 및 배터리의 모드 상태 등을 검출한다.When the electric vehicle is started, the battery state detecting apparatus 100 detects a current of the battery, a battery temperature, a mode state of the battery, and the like.
이에, 제어장치(200)는 상기 배터리 상태 검출장치(100)에서 검출되는 배터리의 전류, 배터리 온도 및 배터리의 모드 상태 등을 입력받기 위해 소정의 제어신호를 출력하면, 상기 배터리 상태 검출장치(100)는 검출된 배터리의 전류, 배터리 온도 및 배터리의 모드 상태 등을 출력한다.Thus, the controller 200 outputs a predetermined control signal to receive the current, battery temperature, and the mode state of the battery detected by the battery state detection device 100, the battery state detection device 100 ) Outputs the detected battery current, battery temperature, and battery mode status.
제어장치(200)는 상기 배터리 상태 검출장치(100)에서 검출되는 배터리의 전류, 배터리 온도 및 배터리의 모드 상태 등을 입력받아, 배터리 충전상태를 연산한다.The controller 200 receives the current of the battery, the battery temperature, the mode state of the battery, and the like detected by the battery state detection device 100, and calculates a state of charge of the battery.
상기에서 배터리 충전상태(SOC)는 종래 배터리 충전상태를 산출하기 위한 상기 수학식 1에 배터리 온도, 반전 전류 크기, 노후화 등으로 결정되는 배터리 실시간 용량에 배터리 초기용량을 곱셈 연산하여 산출되는 배터리 건강상태(SOH)를 고려하여 하기의 수학식 2와 같이 산출할 수 있다.The battery state of charge (SOC) is a battery health state calculated by multiplying the initial battery capacity by the battery real time capacity determined by the battery temperature, inversion current magnitude, aging, etc. In consideration of (SOH), it may be calculated as in Equation 2 below.
상기에서 From above
상기에서 SOC는 배터리 충전상태,SOC is the state of charge of the battery,
Used_Ah_Sec는 단위시간당 입출력 전류량,Used_Ah_Sec is the amount of input / output current per unit time,
Init_Base_Ah는 배터리 초기 용량,Init_Base_Ah is the initial battery capacity,
Aging_Factor는 배터리 누후화 계수,Aging_Factor is the battery aging factor,
C_Rate_Efficiency는 배터리 충/방전 전류에 따른 용량효율C_Rate_Efficiency is the capacity efficiency according to the battery charge / discharge current
Batt_Temp_Efficiency는 배터리 온도에 따른 용량 효율이다.Batt_Temp_Efficiency is capacity efficiency with battery temperature.
즉, 배터리 건강상태(SOH)를 고려하여 나온 최종 전류 용량(Available_Ah)은 배터리의 실시간 용량이라고 할 수 있다.That is, the final current capacity (Available_Ah), which is taken into consideration of the battery health state (SOH), may be referred to as a real time capacity of the battery.
따라서, 상기 배터리 건강상태(SOH)를 고려하여 나온 최종 전류용량(Available_Ah)은 도 3에 도시되어 있는바와 같이 배터리 충/방전 전류에 따른 전류 용량 효율과 배터리 온도와 노후화 계수를 곱하여 배터리 건강상태(SOH)를 구하여 실시간 배터리 효율을 구한다.Therefore, the final current capacity (Available_Ah) obtained by considering the battery health state (SOH) is multiplied by the current capacity efficiency according to the battery charge / discharge current and the battery temperature and the aging coefficient as shown in FIG. SOH) to obtain real time battery efficiency.
이어서, 상기 실시간 배터리 효율에 배터리 초기 용량을 곱하여, 배터리 건강상태(SOH)인 실시간 방전 가용 용량이 고려된 배터리 충전상태(SOC)를 산출함으로서, 배터리 충전상태(SOC)의 계산 정밀도를 향상시킬 수 있다.Subsequently, multiplying the real-time battery efficiency by the initial battery capacity to calculate the battery state of charge (SOC) considering the real-time discharge available capacity of the battery health state (SOH), thereby improving the calculation accuracy of the state of battery charge (SOC) have.
이로써, 순수 및 하이브리드 전기 자동차 배터리 제어기의 배터리 충전상태(SOC) 계산 정밀도 향상으로 배터리 관리시스템 성능을 향상시킬 수 있다.As a result, the battery management system performance can be improved by improving the battery charge state (SOC) calculation accuracy of pure and hybrid electric vehicle battery controllers.
이상 설명한 바와 같이 본 발명은 순수 및 하이브리드 전기 자동차 배터리 제어기의 배터리 충전상태(SOC) 계산 정밀도 향상으로 배터리 잔존용량 및 잔존 주행거리 예측 신뢰성 향상 및 배터리 손상으로 인한 수리 작업을 최소화시킬 수 있고, 배터리 관리시스템 성능을 향상시킬 수 있는 효과가 있다.As described above, the present invention improves battery state of charge (SOC) calculation accuracy of pure and hybrid electric vehicle battery controllers, thereby improving reliability of predicting remaining battery capacity and remaining mileage, and minimizing repair work due to battery damage, and battery management. This has the effect of improving system performance.
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| CN102445663A (en) * | 2011-09-28 | 2012-05-09 | 哈尔滨工业大学 | Method for estimating battery health of electric automobile |
| CN102445663B (en) * | 2011-09-28 | 2014-04-02 | 哈尔滨工业大学 | Method for estimating battery health of electric automobile |
| KR20150049860A (en) * | 2013-10-31 | 2015-05-08 | 현대모비스 주식회사 | Computations method and computer readable recording medium for vehicle battery remaining capacity available |
| CN105391080A (en) * | 2015-11-03 | 2016-03-09 | 国网江西省电力科学研究院 | Optimized operation method of energy storage system |
| KR102091340B1 (en) * | 2018-12-11 | 2020-03-19 | 연세대학교 산학협력단 | Battery level indicator and method displaying battery level thereof |
| CN111257779A (en) * | 2020-02-11 | 2020-06-09 | 北京海博思创科技有限公司 | SOH determination method and device of battery system |
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