KR100192225B1 - Charge ending apparatus of electric motor battery by sensing charge voltage radius - Google Patents
Charge ending apparatus of electric motor battery by sensing charge voltage radius Download PDFInfo
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- KR100192225B1 KR100192225B1 KR1019960029290A KR19960029290A KR100192225B1 KR 100192225 B1 KR100192225 B1 KR 100192225B1 KR 1019960029290 A KR1019960029290 A KR 1019960029290A KR 19960029290 A KR19960029290 A KR 19960029290A KR 100192225 B1 KR100192225 B1 KR 100192225B1
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- charging
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- 238000007600 charging Methods 0.000 claims abstract description 83
- 238000001514 detection method Methods 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- 239000002253 acid Substances 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000008207 working material Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- 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
-
- 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
- B60L2240/547—Voltage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
-
- 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
본 발명은 전기자동차 배터리의 충전과정중 충전전압의 곡률을 감지하여 수소가스 발생 이전에 충전을 종료하도록 하는 충전전압 곡률감지에 의한 전기자동차 배터리의 충전종지에 관한 것이다.The present invention relates to an end of charge of an electric vehicle battery by detecting a curvature of curvature of voltage to sense the curvature of the charging voltage during the charging process of the electric vehicle battery to terminate the charging before hydrogen gas generation.
종래와 같이 수소가스가 발생하게 될 전압(예컨대 14.4 V)에서 획일적으로 충전을 종료하는 것은 온도에 따라 수소가스 발생전압이 달라짐에도 불구하고 충전당시의 온도를 고려하지 않은 것이므로 부적합한 문제점이 있었다.Ending charging uniformly at a voltage (for example, 14.4 V) at which hydrogen gas is to be generated, as in the related art, is not suitable because the temperature at the time of charging is not considered even though the hydrogen gas generation voltage is changed depending on the temperature.
본 발명은 충전되는 배터리의 충전전압을 감지하도록 아날로그/디지탈변환기(10)의 입력단에 배터리(12)를 연결함과 더불어 충전전류를 감지하도록 배터리(12)의 전원라인에 홀소자(14)를 설치하여 상기 아날로그/디지탈변환기(10)의 입력단에 연결하고, 상기 아날로그/디지탈변환기(10)의 출력단에는 타이머(16)가 연결되어 단위시간당 충전전압의 변화율을 통해 곡률을 산출하는 논리연산부(18)를 연결하며, 상기 논리연산부(18)의 출력단에는 논리연산부(18)의 제어신호에 따라 스위칭되는 스위칭부(20)를 통해 배터리(12)에 충전전원을 공급하는 전원부(22)를 연결하여 이루어진 발명임.The present invention connects the battery 12 to the input terminal of the analog / digital converter 10 to sense the charging voltage of the battery being charged, and the Hall element 14 to the power line of the battery 12 to sense the charging current. Installed and connected to an input terminal of the analog / digital converter 10, and a timer 16 connected to the output terminal of the analog / digital converter 10 to calculate a curvature through a rate of change of the charging voltage per unit time. And a power supply unit 22 for supplying charging power to the battery 12 through a switching unit 20 switched according to a control signal of the logic operation unit 18 to an output terminal of the logic operation unit 18. It is an invention made.
Description
본 발명은 전기자동차 배터리의 충전종지장치에 관한 것으로, 더욱 상세하게는 충전과정중 충전전압의 곡률을 감지하여 수소가스 발생이전에 충전을 종료하도록 하는 충전전압 곡률감지에 의한 전기자동차 배터리의 충전종지에 관한 것이다.The present invention relates to a charging end device for an electric vehicle battery, and more particularly, to stop the charging of the electric vehicle battery by detecting the curvature of the charging voltage to sense the curvature of the charging voltage during the charging process before the hydrogen gas generation It is about.
최근의 자동차개발추세로서는 대기오염에 심각한 영향을 주고 있는 현재의 가솔린이나 중유를 주연료로 사용하여 이의 연소에 의한 폭발력으로 주행할 수 있는 동력을 얻도록 된 차량대신에 공해발생이 적은 차량을 개발하기 위하여 많은 연구가 이루어지고 있는 바, 그중 하나로서 전력에 의하여 움직이는 전기자동차의 개발에 많은 노력을 기울이고 있다.Recent development trends in the development of vehicles with low pollution instead of vehicles that use the current gasoline or heavy fuel oil, which has a serious impact on air pollution, as the main fuel to obtain the power to drive with the explosive power of combustion. In order to do so, many researches have been conducted, and as one of them, much effort is being made to develop electric vehicles driven by electric power.
전기자동차는 구동연료로서 대개 2차전지인 납축전지를 사용하고 있으며, 납축전지에서 출력되는 전원으로 동력발생장치를 구동시키고 이를 동력전달장치를 통해 구동휠로 전달하여 구동휠을 회전시키므로써 전기자동차를 구동시키게 된다.Electric vehicles usually use lead acid batteries, which are secondary batteries, as a driving fuel, and drive electric power generators with power output from lead acid batteries, and transmit them to the driving wheels through the power transmission device to rotate the driving wheels. Will be driven.
이러한 납축전지는 각각 다른 금속으로 만든 양극과 음극의 전극과 전해액으로 구성되어 있으며, 양 극에 부하를 연결하여 각 전극의 작용물질과 전해액이 가지는 화학적 에너지를 전기적 에너지로 끌어 낼 수 있게 되어 있다. 또한 역으로 전기적 에너지를 주면 다시 화학적 에너지를 가진 본래의 작용 물질로 되돌아가게 된다.These lead-acid batteries are composed of electrodes and electrolytes of a positive electrode and a negative electrode made of different metals, and by connecting a load to the positive electrode, it is possible to draw chemical energy of the working material and electrolyte of each electrode into electrical energy. Conversely, giving electrical energy back to the original working material with chemical energy.
그리하여 방전된 배터리는 충전기를 이용하여 재충전하여 사용하게 되는 바, 종래 전기자동차용 Pb-Acid 전지 충전시 정전류 충전의 경우, 충전 종료는 배터리 전압이 수소발생전압이라 여겨지는 전지당 14.4V(셀 당 2.4V)에 이르렀을때이다.Thus, the discharged battery is recharged using a charger. In the case of constant current charging when charging a conventional Pb-Acid battery for an electric vehicle, the end of charging is 14.4 V per cell in which the battery voltage is regarded as a hydrogen generation voltage (per cell). 2.4V).
수소발생전압이라 여겨지는 전압에서 충전을 종료하는 이유는 그 이상 전류를 넣어주게 되면 수소발생전압 이상으로 전압이 상승하게 되어 전류가 충전에 해당하는 전기화학반응이라든가 수소가스 발생에 동시에 소모되므로, 일정 전류 충전시 상대적으로 충전에 해당하는 전기화학반응에 소모되는 전류비율(충전효율)이 떨어지게 되며, 가스발생으로 전지 부풀음 현상등 폭발의 위험성이 있기 때문이다.The reason for the end of charging at the voltage considered as hydrogen generation voltage is that if the current is put higher than that, the voltage rises above the hydrogen generation voltage and the current is consumed at the same time as the electrochemical reaction corresponding to the charging or the generation of hydrogen gas. This is because the current ratio (charging efficiency) consumed in the electrochemical reaction corresponding to charging decreases when charging the current, and there is a risk of explosion such as battery swelling due to gas generation.
또한 충전환경의 온도별로 수소발생전압이 달라지게 되는데, 300C 이상의 고온시 수소발생전압이 감소하게 되며, 예컨대 500C 에서는 13.8 V에서 수소가 발생하게 된다.In addition, the hydrogen generation voltage is changed according to the temperature of the charging environment, the hydrogen generation voltage is reduced at a high temperature of more than 30 0 C, for example, hydrogen is generated at 13.8 V at 50 0 C.
따라서 종래와 같이 수소가스가 발생하게 될 전압(예컨대 14.4 V)에서 획일적으로 충전을 종료하는 것은 충전당시의 온도를 고려하지 않은 것이므로 부적합한 문제점이 있었다.Therefore, the conventionally terminating charging at a voltage (for example, 14.4 V) at which hydrogen gas is to be generated is not considered because the temperature at the time of charging is not considered.
본 발명은 상기한 문제점을 개선하기 위하여 발명한 것으로, 충전기를 통해 충전작용을 수행하는 동안에 충전전압의 시간당 변화율을 구하고 그를 통해 충전곡선의 곡률을 산출하여 곡률이 0b00c이 되는 시점 즉 수소가스가 발생되기 시작하는 시점을 충전당시의 온도등 환경변화를 고려하여 검출하여 그 시점에서 충전작용을 종료하도록 하는 충전전압 곡률감지에 의한 전기자동차 배터리의 충전종지장치를 제공하고자 함에 발명의 목적이 있다.The present invention has been invented to improve the above-mentioned problems, while the charging rate is calculated during the charging operation through the charger, and the curvature of the charging curve is calculated through it, the curvature becomes 0b00c, that is, hydrogen gas is generated. An object of the present invention is to provide a charging end device for an electric vehicle battery by detecting a curvature of curvature of voltage to detect a starting point in consideration of environmental changes such as temperature at the time of charging and ending a charging operation at that time.
상기한 목적을 실현하기 위한 본 발명은 스위칭수단을 통해 전원공급수단에서 출력되는 전원을 자동차 배터리에 공급하여 충전할 수 있도록 된 충전기에 있어서, 충전되는 배터리의 충전전압과 충전전류를 검출하여 디지탈신홀로 변환하는 수단을 구비함과 더불어 충전시간을 감지하는 수단을 구비하고, 상기 수단들로 부터 시간당 충전전압의 변화율 즉 충전곡선을 유출하고 이어 그 충전곡선의 곡률을 산출하여 곡률이 0b00c이 되는 시점을 수소가 발생되기 시작하는 전압이라 판단하여 그 시점에서 충전작용을 종료시키기 위한 제어신호를 출력하는 논리연산수단을 구비하며, 상기 스위칭수단은 충전종료신호에 따라 전원공급수단에서 배터리로 공급되는 전원을 차단하도록 이루어진 것이다.The present invention for realizing the above object is a charger that can be charged by supplying the power output from the power supply means to the car battery through the switching means, by detecting the charging voltage and charging current of the battery to be charged digital It is provided with a means for converting to a hole and a means for detecting the charging time, and the rate of change of the charging voltage per hour, that is, the charging curve flows out from the means and then the curvature of the charging curve is calculated to the curvature becomes 0b00c And logic operation means for outputting a control signal for terminating the charging operation at that time, which is determined as the voltage at which hydrogen is generated, wherein the switching means is a power source supplied from the power supply means to the battery according to the end signal for charging. It is intended to block.
도 1 은 본 발명에 따른 구성도,1 is a block diagram according to the present invention,
도 2 는 본 발명에 따른 충전시 충전전류와 전압간의 관계,2 is a relationship between the charging current and the voltage during charging according to the present invention,
도 3 은 본 발명에 따른 충전종지작용을 설명하기 위한 도면이다.3 is a view for explaining the charging termination action according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
10 : 아날로그/디지탈변환기 12 : 자동차 배터리10: analog / digital converter 12: car battery
14 : 홀소자 16 : 타이머14: Hall element 16: Timer
18 : 논리연산부 20 : 스위칭부18: logic operation unit 20: switching unit
22 : 전원부22: power supply
이하 본 발명의 바람직한 일실시예에 따른 충전전압 곡률감지에 의한 전기자동차 배터리의 충전종지장치에 대해 예시도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the charging end device of the electric vehicle battery by detecting the charging voltage curvature according to an embodiment of the present invention will be described in detail based on the exemplary drawing.
본 발명은 충전되는 배터리의 충전전압을 감지하도록 아날로그/디지탈변환기(10)의 입력단에 배터리(12)를 연결함과 더불어 충전전류를 감지하도록 배터리(12)의 전원라인에 홀소자(14)를 설치하여 상기 아날로그/디지탈변환기(10)의 입력단에 연결하고, 상기 아날로그/디지탈변환기(10)의 출력단에는 타이머(16)가 연결되어 단위시간당 충전전압의 변화율을 통해 곡률을 산출하는 논리연산부(18)를 연결하며, 상기 논리연산부(18)의 출력단에는 논리연산부(18)의 제어신호에 따라 스위칭되는 스위칭부(20)를 통해 배터리(12)에 충전전원을 공급하는 전원부(22)를 연결한 구조로 되어 있다.The present invention connects the battery 12 to the input terminal of the analog / digital converter 10 to sense the charging voltage of the battery being charged, and the Hall element 14 to the power line of the battery 12 to sense the charging current. Installed and connected to an input terminal of the analog / digital converter 10, and a timer 16 connected to the output terminal of the analog / digital converter 10 to calculate a curvature through a rate of change of the charging voltage per unit time. And a power supply unit 22 for supplying charging power to the battery 12 through a switching unit 20 switched according to a control signal of the logic operation unit 18 to an output terminal of the logic operation unit 18. It is structured.
제 1 도는 본 발명의 구성도를 도시한 것이다.1 is a block diagram of the present invention.
배터리(12)의 충전전압을 측정하기 위해 양극과 음극에는 아날로그/디지탈변환기(10)가 연결됨과 더불어 배터리(12)의 전원라인 일측에는 홀소자(14)가 설치되어 홀소자(12)의 출력단에 상기 아날로그/디지탈변환기(10)의 입력단이 연결되어 있다.In order to measure the charging voltage of the battery 12, an analog / digital converter 10 is connected to the positive electrode and the negative electrode, and a hall element 14 is installed at one side of a power line of the battery 12, so that an output terminal of the hall element 12 is provided. The input terminal of the analog / digital converter 10 is connected to.
따라서 아날로그/디지탈변환기(10)는 배터리(12)의 출력전압을 감지하여 디지탈신호로 변환함과 더불어 홀소자(14)를 통해 감지되는 배터리(12)의 전류량을 디지탈신호로 변환한 후 논리연산부(18)로 출력한다.Therefore, the analog / digital converter 10 detects the output voltage of the battery 12 and converts it into a digital signal, and also converts the current amount of the battery 12 detected through the hall element 14 into a digital signal and then converts the logic into a digital signal. Output to (18).
논리연산부(18)에서는 충전중에 있는 배터리(12)의 충전전압을 감지하여 수소가스가 발생되기 시작할 전압까지 충전되었는지 여부를 검출하는 작용을 하게 되는데, 이때 타이머(16)에서 출력되는 시간에 따라 단위시간당 충전되는 전압의 변화율을 측정하고 그에 따른 충전곡선의 곡률을 측정하여 충전종지시점을 판단하게 된다.The logic operation unit 18 detects the charging voltage of the battery 12 being charged and detects whether the hydrogen gas has been charged up to the voltage at which hydrogen gas is to be generated. In this case, the unit is based on the time output from the timer 16. The end point of charging is determined by measuring the rate of change of the voltage charged per hour and measuring the curvature of the charging curve.
즉 배터리(12)의 충전시 충전전류와 전압간의 관계는 제 2 도에 도시된 바와 같고, 이를 다시 시간에 따른 전압증가를 살펴보면 다음 표 1과 같다.That is, the relationship between the charging current and the voltage at the time of charging the battery 12 is as shown in FIG. 2 and the voltage increase with time is shown in Table 1 below.
표 1 에 있어 V은 (V- V)을 나타내고, t은 (t- t)을 나타내는 것이며, 이하 동일한 방법으로 기재된 것이다.In Table 1, V represents (V-V), t represents (t-t), and is described by the same method below.
여기서 충전곡선에 대한 곡률은 전압을 시간에 대해 2차 미분하여 구할 수 있으며, 이때 A영역에서는 곡률의 부호가 (+)가 되고, B영역에서는 t에서 (+), t에서 (0), t에서 (-)가 되며, C영역에서는 계속 (-)를 유지하게 된다.Here, the curvature of the charging curve can be obtained by the second derivative of the voltage with respect to time, where the sign of the curvature becomes (+) in the area A, and (+) in t, (0) and t in the B area. It becomes (-) at, and keeps (-) at C area.
이는 A영역에서는 전류가 충전전기 화학반응에 소요되므로 충전이 되는 부분이고, B영역은 충전반응외에 수소가스 발생으로 인해 전압이 급격히 상승하는 부분이며, C영역은 전류가 수소발생에만 소요되므로 충전이 안되는 부분이다.This is the part that is charged in the area A because the electric current is required for the charging electrochemical reaction, and the part B is the part where the voltage rises rapidly due to the generation of hydrogen gas in addition to the charging reaction. It should not be.
보통 수소발생 개시 전압은 t에 해당된다.Usually the hydrogen evolution starting voltage corresponds to t.
표 1에서 보는 바와 같이 충전곡선은 변곡점인 t를 기준으로 곡률이 바뀌게 되며, 앞서 설명된 바와 같이 부호가 (+)에서 (-)로 바뀌게 된다.As shown in Table 1, the charging curve is changed based on the inflection point t, and the sign is changed from (+) to (-) as described above.
그러므로 곡률이 (0)가 되는 시점(+에서 -로 바뀌는 시점)을 충전종료점으로 파악하면 된다.Therefore, the point at which the curvature becomes (0) (the point of change from + to-) is regarded as the end point of charging.
이러한 충전곡선은 온도와 무관하게 나타나는 것으로, 물론 가스발생전압은 온도에 따라 변화하지만, 곡률이 바뀌는 시점을 충전종료시점으로 잡아주면 온도에 관계없이 충전종료 조건이 된다.This charging curve appears regardless of the temperature, of course, the gas generation voltage changes depending on the temperature, but when the end point of the charge is changed to the end point of charging regardless of the temperature becomes a charging end condition.
한편, 전원부(22)는 배터리(12)에 충전될 전원을 공급하는 장치로서 스위칭부(20)를 통해 배터리(12)에 전원을 공급하도록 이루어져 있다. 그리고 상기 스위칭부(20)는 논리연산부(18)에서 출력되는 제어신호에 따라 스위칭 온 또는 오프 되도록 이루어져 있는 것이다.On the other hand, the power supply unit 22 is a device for supplying power to be charged to the battery 12 is configured to supply power to the battery 12 through the switching unit 20. The switching unit 20 is configured to be switched on or off according to the control signal output from the logic operation unit 18.
이와 같은 동작에 대해 예시도면 제 3 도에 도시된 흐름도에 의거 다시한번 상세히 설명한다.This operation will be described in detail once again based on the flowchart shown in FIG. 3.
먼저 논리연산부(18)는 충전개시와 함께 스위칭부(20)를 작동시켜 전원부(22)로 부터 발생되는 전원을 배터리(12)로 공급하여 충전작용을 시작한다.First, the logic operation unit 18 operates the switching unit 20 at the start of charging to supply power generated from the power supply unit 22 to the battery 12 to start the charging operation.
이와 함께 타이머(16)로 부터 경과시간을 감지하면서 자동차 배터리(12)의 전압의 변동상황을 체크한다.At the same time, the elapsed time is detected from the timer 16 to check the variation of the voltage of the vehicle battery 12.
그리고 시간에 대한 전압변동율을 2차 미분하여 그에 따른 부호가 (+)에서 (-)로 변할때 까지 충전작용을 지속하고, (+)에서 (-)로 변하는 변곡시점이 감지되면 스위칭부(20)를 오프시켜 충전작용을 종료한다.Then, the second derivative of the rate of change of voltage over time is continued until the sign is changed from (+) to (-), and the charging operation is continued. When the inflection point is changed from (+) to (-), the switching unit 20 To turn off the charging operation.
상기한 바와 같이 본 발명은 자동차 배터리의 충전시 충전종지시점을 결정함에 있어, 충전전압과 충전전류를 감지하고 시간에 따른 전압변동율을 통해 충전곡률을 감지하여 충전곡률에 대한 부호가 (+)에서 (-)로 변하는 시점을 충전종지시점으로 결정하여 충전을 종료함으로써, 온도, 배터리 수명(장시간 사용시 수소발생전압이 변함)에 관계없이 충전종료시점을 판단할 수 있게 되어 수소가스 발생으로 인한 전지손상을 최소화 할 수 있는 장점이 있다.As described above, in the present invention, when determining the end point of charging during charging of a car battery, the charging voltage and the charging current are sensed, and the charging curvature is sensed by the voltage variation rate over time. By determining the end point of charging as the end point of charging by changing to (-) and ending the charging, it is possible to judge the end point of charging regardless of temperature and battery life (hydrogen generation voltage changes over time). There is an advantage that can be minimized.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019960029290A KR100192225B1 (en) | 1996-07-19 | 1996-07-19 | Charge ending apparatus of electric motor battery by sensing charge voltage radius |
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| KR1019960029290A KR100192225B1 (en) | 1996-07-19 | 1996-07-19 | Charge ending apparatus of electric motor battery by sensing charge voltage radius |
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| KR101225052B1 (en) * | 2010-12-28 | 2013-01-22 | 한전케이디엔주식회사 | Management system for charging electric vehicle |
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| KR20020035026A (en) * | 2002-02-22 | 2002-05-09 | 안병주 | The control system that the storage battery for quick charging can full charged |
| KR100448367B1 (en) * | 2002-03-06 | 2004-09-10 | 현대자동차주식회사 | Method for battery management on hybrid electric vehicle |
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| KR101225052B1 (en) * | 2010-12-28 | 2013-01-22 | 한전케이디엔주식회사 | Management system for charging electric vehicle |
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