KR20130053064A - Vehicle battery performance improving method in cold state - Google Patents
Vehicle battery performance improving method in cold state Download PDFInfo
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- 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
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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
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/53—Batteries
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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
- B60L58/18—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
- B60L58/20—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 having different nominal voltages
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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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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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
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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
- B60Y2200/92—Hybrid vehicles
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- 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
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- 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
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- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
Description
본 발명은 차량의 저온시 배터리 출력성능 향상 방법에 관한 것으로서, 보다 상세하게는 하이브리드 차량이나 연료전지차량 등의 전기차량에서 배터리팩이 저온 상황에 의해 차량에 필요한 전력을 공급하기 어려운 상황이 발생할 때, 이를 해결 내지는 완화시킬 수 있도록 하는 기술에 관한 것이다.The present invention relates to a method for improving battery output performance at low temperature of a vehicle, and more particularly, when an electric vehicle such as a hybrid vehicle or a fuel cell vehicle is difficult to supply power required for a vehicle due to a low temperature situation. The present invention relates to a technology for solving or mitigating this problem.
하이브리드 차량이나 연료전지차량 등과 같이 배터리팩을 탑재한 전기차량은 배터리팩의 저온 동작 특성에 의해, 저온시의 차량 운전성에 큰 영향을 받는다.
Electric vehicles equipped with a battery pack, such as a hybrid vehicle or a fuel cell vehicle, are greatly influenced by vehicle operation at low temperature by the low temperature operation characteristics of the battery pack.
즉, 배터리팩은 그 내구수명 등을 고려하여, 저온 상황에서 해당 온도에 따른 컷오프 전압이 정해져 있어서, 이 컷오프 전압 이하로 배터리팩의 전압 또는 각 배터리셀의 전압이 낮아지면 릴레이를 오프시켜서 전력 공급을 차단하도록 되어 있어서, 저온시의 냉간 발진 또는 킥다운 운전 상황에서 요구되는 전력을 제공하지 못하는 경우가 발생할 수 있는 것이다.
That is, the battery pack has a cutoff voltage determined according to the temperature at a low temperature in consideration of its endurance life and the like, and when the voltage of the battery pack or the voltage of each battery cell becomes lower than the cutoff voltage, the relay is turned off to supply power. In order to cut off the power supply, it may occur in the case of failing to provide the required power in the cold oscillation or kickdown operation situation at low temperatures.
따라서, 종래에는 상기한 바와 같은 상황을 최대한 억제하고자, 배터리팩에 PTC 등의 가열장치를 장착하여 배터리의 온도를 강제적으로 상승시키도록 하는 방안이 제시되고 있으나, 이와 같은 방법은 배터리시스템의 크기 증대 및 원가상승을 발생시키는 문제점이 있다.
Therefore, in order to suppress the above situation as much as possible, a method of forcibly increasing the temperature of the battery by installing a heating device such as PTC in the battery pack has been proposed, but such a method increases the size of the battery system. And cost increase.
상기의 발명의 배경이 되는 기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진 자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.The matters described as the background of the above-described invention are merely for the purpose of enhancing the understanding of the background of the present invention and are accepted as acknowledging that they correspond to the prior art already known to those skilled in the art. I will not.
본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 배터리시스템의 크기 증대나 원가 상승을 초래하지 않으면서도, 저온시에 배터리팩으로부터의 전력 공급이 원활히 이루어질 수 있도록 함으로써, 전기차량의 저온 운전성을 향상시킬 수 있도록 한 차량의 저온시 배터리 출력성능 향상 방법을 제공함에 그 목적이 있다.The present invention has been made to solve the above-mentioned problems, and it is possible to smoothly supply power from the battery pack at low temperatures without causing an increase in the size of the battery system or an increase in costs, thereby reducing the low temperature of the electric vehicle. An object of the present invention is to provide a method of improving battery output performance at a low temperature of a vehicle to improve driving performance.
상기한 바와 같은 목적을 달성하기 위한 본 발명 차량의 저온시 배터리 출력성능 향상 방법은 Battery output performance improvement method of the vehicle of the present invention for achieving the above object is
차량의 저온 운전성 향상이 필요한 상황인지를 판단하는 운전판단단계와;A driving determination step of determining whether the situation requires improvement of the low temperature driving performance of the vehicle;
배터리팩의 온도가 소정의 기준온도 이하인지를 판단하는 온도판단단계와;A temperature judging step of determining whether a temperature of the battery pack is lower than a predetermined reference temperature;
상기 운전판단단계 수행결과, 차량의 저온 운전성 향상이 필요한 상황이고, 상기 배터리팩의 온도가 소정의 기준온도 이하인 경우, 상기 배터리의 컷오프 전압을 소정수준으로 낮추는 제한완화단계;A limit relaxation step of lowering a cutoff voltage of the battery to a predetermined level when the temperature of the battery pack is lower than a predetermined reference temperature as a result of performing the driving determination step;
를 포함하여 구성된 것을 특징으로 한다.And a control unit.
본 발명은 배터리시스템의 크기 증대나 원가 상승을 초래하지 않으면서도, 저온시에 배터리팩으로부터의 전력 공급이 원활히 이루어질 수 있도록 함으로써, 전기차량의 냉간 발진 또는 킥다운 급가속 등의 저온 운전성을 향상시킬 수 있도록 한다.The present invention improves the low-temperature operation of the electric vehicle such as cold start or kick-down acceleration by allowing the power supply from the battery pack to be smoothly performed at low temperatures without causing an increase in the size or cost of the battery system. Make it work.
도 1은 본 발명에 따른 차량의 저온시 배터리 출력성능 향상 방법의 실시예를 도시한 순서도,
도 2는 본 발명 차량의 저온시 배터리 출력성능 향상 방법을 정리한 도표,
도 3은 본 발명 차량의 저온시 배터리 출력성능 향상 방법의 개념을 설명한 그래프이다.1 is a flowchart illustrating an embodiment of a method for improving battery output performance at low temperature of a vehicle according to the present invention;
2 is a table summarizing a method of improving battery output performance at low temperature of the vehicle according to the present invention;
3 is a graph illustrating a concept of a method of improving battery output performance at low temperature of the vehicle according to the present invention.
도 1을 참조하면, 본 발명 차량의 저온시 배터리 출력성능 향상 방법의 실시예는 차량의 저온 운전성 향상이 필요한 상황인지를 판단하는 운전판단단계(S10)와; 배터리팩의 온도가 소정의 기준온도 이하인지를 판단하는 온도판단단계(S20)와; 상기 운전판단단계(S10) 수행결과, 차량의 저온 운전성 향상이 필요한 상황이고, 상기 배터리팩의 온도가 소정의 기준온도 이하인 경우, 상기 배터리의 컷오프 전압을 소정수준으로 낮추는 제한완화단계(S30)를 포함하여 구성된다.
Referring to FIG. 1, an embodiment of a method of improving battery output performance at low temperature of a vehicle according to an embodiment of the present invention may include: a driving determination step S10 of determining whether a situation is required to improve low temperature driving performance of a vehicle; A temperature judging step (S20) of determining whether a temperature of the battery pack is lower than a predetermined reference temperature; As a result of performing the driving determination step (S10), it is necessary to improve the low temperature driving performance of the vehicle, and when the temperature of the battery pack is lower than a predetermined reference temperature, the limit relaxation step of lowering the cutoff voltage of the battery to a predetermined level (S30). It is configured to include.
상기 운전판단단계(S10)에서 상기 차량의 저온 운전성 향상이 필요한 상황은 차량의 냉간 발진 상황이거나, 차량의 킥다운 급가속 상황이 될 수 있다.
In the driving determination step (S10), a situation in which the low temperature driving performance of the vehicle is required to be improved may be a cold start state of the vehicle or a kickdown rapid acceleration state of the vehicle.
즉, 배터리로부터의 전력 공급에 의해 차량의 저온 운전성이 문제가 될 수 있는 차량의 냉간 발진 상황이나 킥다운 급가속 상황에서는, 통상의 배터리 컷오프 전압을 준수하지 않고, 이보다 낮은 소정수준의 전압으로 낮추어 적용함으로써, 배터리로부터 보다 원활한 전력의 공급으로 차량의 운전성이 개선될 수 있도록 한 것이다.
That is, in a cold start situation or a kick-down acceleration state in which the low temperature driving performance of the vehicle may be a problem due to the power supply from the battery, a voltage of a predetermined level lower than the normal battery cutoff voltage is not observed. By lowering and applying, the driving performance of the vehicle can be improved by supplying more smooth power from the battery.
상기 제한완화단계(S30)에서는 상기 배터리팩의 컷오프 전압 및 상기 배터리팩을 구성하는 각 배터리셀의 컷오프 전압을 함께 각각 낮추고, 상기 배터리팩의 전압 및 상기 각 배터리셀의 전압이 상기 각각의 컷오프 전압 이상인 경우에만 전력을 공급하도록 한다.
In the limit relaxation step (S30), the cutoff voltage of the battery pack and the cutoff voltage of each battery cell constituting the battery pack are lowered, respectively, and the voltage of the battery pack and the voltage of each battery cell are the respective cutoff voltages. Supply the power only in case of abnormality.
즉, 배터리팩 전체로서의 컷오프 전압은 물론, 상기 배터리팩을 구성하는 각 배터리셀들의 컷오프 전압을 함께 고려하여, 해당 온도에서 각각 해당 컷오프 전압 이상을 제공할 수 있는 경우에만 전력을 상기 배터리가 공급할 수 있도록 함으로써, 배터리의 내구수명 저하 현상을 방지하도록 하는 것이다.
That is, considering the cutoff voltage of the battery pack as well as the cutoff voltage of the battery pack as a whole, the battery can supply power only when the cutoff voltage of the battery pack can be equal to or higher than the cutoff voltage at the corresponding temperature. By doing so, it is possible to prevent the deterioration of durability of the battery.
상기 온도판단단계(S20)에서의 상기 소정의 기준온도는 복수개로 설정되고, 상기 각각의 기준온도에 따라, 상기 제한완화단계(S30)에서 상기 배터리의 컷오프 전압은 상기 기준온도의 고저에 따라 낮추는 정도를 각각 달리 설정할 수 있다.
The predetermined reference temperature in the temperature determination step (S20) is set to a plurality, and in accordance with the respective reference temperature, the cut-off voltage of the battery in the limit relaxation step (S30) is lowered according to the elevation of the reference temperature The degree can be set differently.
도 2 또는 도 3에서는, 상기 온도판단단계(S20)에서의 상기 소정의 기준온도는 상대적으로 낮은 기준온도인 제1기준온도와, 상대적으로 높은 기준온도인 제2기준온도로 설정되고, 상기 제한완화단계(S30)에서는 상기 배터리팩의 온도가 상기 제1기준온도 이하인 경우 통상의 배터리 컷오프 전압보다 낮은 소정의 전압으로 컷오프 전압을 설정하고, 상기 제1기준온도 초과 상기 제2기준온도 이하인 경우에는 상기 통상의 배터리 컷오프 전압과 상기 소정의 컷오프 전압 사이의 전압으로 각 온도에 따라 선형적으로 변화하도록 컷오프 전압을 설정하도록 하였다.
In FIG. 2 or FIG. 3, the predetermined reference temperature in the temperature determination step S20 is set to a first reference temperature which is a relatively low reference temperature and a second reference temperature which is a relatively high reference temperature. In the easing step (S30), when the temperature of the battery pack is less than or equal to the first reference temperature, the cutoff voltage is set to a predetermined voltage that is lower than a normal battery cutoff voltage, and when the temperature is greater than or equal to or greater than the second reference temperature. The cutoff voltage was set to change linearly with each temperature to a voltage between the normal battery cutoff voltage and the predetermined cutoff voltage.
상기 제1기준온도는 영하 10도±3도이고, 상기 제2기준온도는 0도±3이며; 상기 통상의 배터리 컷오프 전압은 배터리셀의 컷오프 전압이 2.75V±0.5V이고, 배터리팩의 컷오프 전압이 200V±5V이며; 상기 통상의 배터리 컷오프 전압보다 낮은 소정의 컷오프 전압은 배터리셀의 컷오프 전압이 2.3V±0.5V이고, 배터리팩의 컷오프 전압이 166V±5V로 설정할 수 있을 것이다.
The first reference temperature is minus 10 degrees ± 3 degrees, and the second reference temperature is 0 degrees ± 3 degrees; The conventional battery cutoff voltage is a cutoff voltage of the battery cell is 2.75V ± 0.5V, the cutoff voltage of the battery pack is 200V ± 5V; The predetermined cutoff voltage lower than the normal battery cutoff voltage may set the cutoff voltage of the battery cell to 2.3V ± 0.5V and the cutoff voltage of the battery pack to 166V ± 5V.
도 2를 참조하면, 상기 제1기준온도는 영하 10도이고, 상기 제2기준온도는 0도이다. 따라서, 온도구간은 상기 영하 10도 이하와, 상기 영하 10도 초과 0도 이하 및 상기 0도 초과의 3개의 구간으로 구분되며, 배터리팩의 온도가 상기 0도 초과인 통상의 상황에서는 상기 통상의 배터리 컷오프 전압은 배터리셀의 컷오프 전압이 2.75V이고, 배터리팩의 컷오프 전압이 200V로 설정되며, 상기 배터리팩의 온도가 영하 10도 이하인 경우 상기 배터리 컷오프 전압은 배터리셀의 컷오프 전압이 2.3V이고, 배터리팩의 컷오프 전압은 166V로 설정하고 있으며, 상기 제1기준온도와 제2기준온도의 사이인 상기 10도 초과 0도 이하의 온도 구간에서는 상기 배터리 컷오프 전압은 배터리셀 컷오프 전압이 상기 2.3V 내지 2.75V 사이의 값으로 설정되며, 배터리팩의 컷오프 전압은 166V 내지 200V 사이의 값으로 설정되는 것이다.
Referring to FIG. 2, the first reference temperature is minus 10 degrees and the second reference temperature is 0 degrees. Therefore, the temperature range is divided into three sub-zero degrees or less, three sub-zero degrees or more and zero degrees or less and the zero degree or more, and the battery pack has a temperature above the zero degree in a normal situation. The cutoff voltage of the battery cell is set to 2.75V, the cutoff voltage of the battery pack is set to 200V, and the cutoff voltage of the battery cell is 2.3V when the temperature of the battery pack is below 10 degrees. The cutoff voltage of the battery pack is set to 166V, and the battery cutoff voltage of the battery cell cutoff voltage is 2.3V in the temperature range of more than 10 degrees and less than 0 degrees between the first reference temperature and the second reference temperature. To 2.75V, and the cutoff voltage of the battery pack is set to a value between 166V and 200V.
도 3은 상기한 바와 같은 상황을 그래프로 표현한 것으로서, 온도에 따른 파워의 그래프로서, 상측의 라인은 컷오프 전압 2.3V의 라인을 도시한 것이고, 하측은 컷오프 전압 2.75V의 라인을 도시한 것으로서, 본 발명은 상기 영하 10도 이하에서는 상기 컷오프 전압 2.3V의 라인을 따라 제어하고, 0도 이상에서는 2.75V 라인을 따라 컷오프 전압을 제어하겠다는 것이며, 영하 10도 초과 0도 미만의 구간에서는 그 사이값으로 제어하겠다는 것으로서, 도면에서는 온도에 따라 선형적으로 변화하도록 표시하였으나, 상황에 따라 상기 사이값 내의 특정의 하나 이상의 특정값으로 제어하도록 하는 것도 가능할 것이다.
3 is a graph representing the above-described situation, in which the upper line shows a line of cut-off voltage of 2.3 V and the lower line shows a line of cut-off voltage of 2.75 V. The present invention is to control the cutoff voltage along the line of the cutoff voltage 2.3V below zero degrees below 10 degrees, and to control the cutoff voltage along a 2.75V line above 0 degrees, the value between the above 10 degrees below zero degrees and less than 0 degrees. In the drawings, although it is indicated to change linearly with temperature, it may be possible to control one or more specific values within the inter-values according to circumstances.
상기한 바와 같이 차량의 저온 운전성이 문제가 될 수 있는 상황에서 제한적으로 배터리의 컷오프 전압을 낮게 적용하여 차량에서 필요로 하는 전력을 상대적으로 원활하게 공급할 수 있도록 함으로써, 별도의 추가적인 부품 등이 필요 없이 차량의 저온 운전성이 크게 개선되도록 할 수 있어서, 차량의 중량이나 원가가 증가하지 않고도 전기차량의 운전성 향상에 기여할 수 있다.
As described above, in a situation where low temperature driving performance of the vehicle may be a problem, by applying a low cutoff voltage of the battery to relatively smoothly supply the power required by the vehicle, an additional additional component is required. The low temperature driving performance of the vehicle can be greatly improved, thereby contributing to the improvement of the driving performance of the electric vehicle without increasing the weight or cost of the vehicle.
본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 기술적 사상을 벗어나지 않는 한도 내에서, 본 발명이 다양하게 개량 및 변화될 수 있다는 것은 당업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.
S10; 운전판단단계
S20; 온도판단단계
S30; 제한완화단계S10; Driving judgment stage
S20; Temperature judgment stage
S30; Restriction Phase
Claims (7)
배터리팩의 온도가 소정의 기준온도 이하인지를 판단하는 온도판단단계(S20)와;
상기 운전판단단계(S10) 수행결과, 차량의 저온 운전성 향상이 필요한 상황이고, 상기 배터리팩의 온도가 소정의 기준온도 이하인 경우, 상기 배터리의 컷오프 전압을 소정수준으로 낮추는 제한완화단계(S30);
를 포함하여 구성된 것을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.A driving determination step (S10) of determining whether a situation in which low temperature driving performance of the vehicle is required is improved;
A temperature judging step (S20) of determining whether a temperature of the battery pack is lower than a predetermined reference temperature;
As a result of performing the driving determination step (S10), it is necessary to improve the low temperature driving performance of the vehicle, and when the temperature of the battery pack is lower than a predetermined reference temperature, the limit relaxation step of lowering the cutoff voltage of the battery to a predetermined level (S30). ;
Battery output performance improvement method of the vehicle, characterized in that configured to include a.
상기 운전판단단계(S10)에서 상기 차량의 저온 운전성 향상이 필요한 상황은 차량의 냉간 발진 상황인 것
을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.The method according to claim 1,
In the driving determination step (S10), the situation in which the low temperature driving performance of the vehicle needs to be improved is the cold start of the vehicle.
How to improve the battery output performance of the vehicle, characterized in that the low temperature.
상기 운전판단단계(S10)에서 상기 차량의 저온 운전성 향상이 필요한 상황은 차량의 킥다운 급가속 상황인 것
을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.The method according to claim 1,
In the driving determination step (S10), the situation in which the low temperature driving performance of the vehicle needs to be improved is a kickdown rapid acceleration situation of the vehicle.
How to improve the battery output performance of the vehicle, characterized in that the low temperature.
상기 제한완화단계(S30)에서는 상기 배터리팩의 컷오프 전압 및 상기 배터리팩을 구성하는 각 배터리셀의 컷오프 전압을 함께 각각 낮추고;
상기 배터리팩의 전압 및 상기 각 배터리셀의 전압이 상기 각각의 컷오프 전압 이상인 경우에만 전력을 공급하도록 하는 것
을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.The method according to claim 1,
In the limit relaxation step (S30), the cutoff voltage of the battery pack and the cutoff voltage of each battery cell constituting the battery pack are respectively lowered together;
Supplying power only when the voltage of the battery pack and the voltage of each battery cell are equal to or greater than the respective cutoff voltage.
How to improve the battery output performance of the vehicle, characterized in that the low temperature.
상기 온도판단단계(S20)에서의 상기 소정의 기준온도는 복수개로 설정되고;
상기 각각의 기준온도에 따라, 상기 제한완화단계(S30)에서 상기 배터리의 컷오프 전압은 상기 기준온도의 고저에 따라 낮추는 정도를 각각 달리 설정하는 것
을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.The method according to claim 1,
The predetermined reference temperature in the temperature determination step (S20) is set to a plurality;
According to each reference temperature, in the limit relaxation step (S30) to set the degree of lowering the cutoff voltage of the battery according to the height of the reference temperature, respectively
How to improve the battery output performance of the vehicle, characterized in that the low temperature.
상기 온도판단단계(S20)에서의 상기 소정의 기준온도는 상대적으로 낮은 기준온도인 제1기준온도와, 상대적으로 높은 기준온도인 제2기준온도로 설정되고;
상기 제한완화단계(S30)에서는 상기 배터리팩의 온도가 상기 제1기준온도 이하인 경우 통상의 배터리 컷오프 전압보다 낮은 소정의 전압으로 컷오프 전압을 설정하고, 상기 제1기준온도 초과 상기 제2기준온도 이하인 경우에는 상기 통상의 배터리 컷오프 전압과 상기 소정의 컷오프 전압 사이의 전압으로 각 온도에 따라 선형적으로 변화하도록 컷오프 전압을 설정하는 것
을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.The method according to claim 1,
The predetermined reference temperature in the temperature determination step (S20) is set to a first reference temperature, which is a relatively low reference temperature, and a second reference temperature, which is a relatively high reference temperature;
In the limiting relaxation step (S30), when the temperature of the battery pack is less than or equal to the first reference temperature, the cutoff voltage is set to a predetermined voltage lower than the normal battery cutoff voltage, and the cutoff voltage is less than or equal to the second reference temperature. In this case, the cutoff voltage is set to change linearly with each temperature by a voltage between the normal battery cutoff voltage and the predetermined cutoff voltage.
How to improve the battery output performance of the vehicle, characterized in that the low temperature.
상기 제1기준온도는 영하 10도±3도이고, 상기 제2기준온도는 0도±3이며;
상기 통상의 배터리 컷오프 전압은 배터리셀의 컷오프 전압이 2.75V±0.5V이고, 배터리팩의 컷오프 전압이 200V±5V이며;
상기 통상의 배터리 컷오프 전압보다 낮은 소정의 컷오프 전압은 배터리셀의 컷오프 전압이 2.3V±0.5V이고, 배터리팩의 컷오프 전압이 166V±5V인 것
을 특징으로 하는 차량의 저온시 배터리 출력성능 향상 방법.The method of claim 6,
The first reference temperature is minus 10 degrees ± 3 degrees, and the second reference temperature is 0 degrees ± 3 degrees;
The conventional battery cutoff voltage is a cutoff voltage of the battery cell is 2.75V ± 0.5V, the cutoff voltage of the battery pack is 200V ± 5V;
The predetermined cutoff voltage lower than the normal battery cutoff voltage is that the cutoff voltage of the battery cell is 2.3V ± 0.5V, and the cutoff voltage of the battery pack is 166V ± 5V.
How to improve the battery output performance of the vehicle, characterized in that the low temperature.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9365121B2 (en) | 2013-12-12 | 2016-06-14 | Hyundai Motor Company | Method and system for controlling charge and discharge of battery |
| WO2022075618A1 (en) * | 2020-10-05 | 2022-04-14 | 주식회사 엘지에너지솔루션 | Battery device and method for predicting battery output |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9365121B2 (en) | 2013-12-12 | 2016-06-14 | Hyundai Motor Company | Method and system for controlling charge and discharge of battery |
| WO2022075618A1 (en) * | 2020-10-05 | 2022-04-14 | 주식회사 엘지에너지솔루션 | Battery device and method for predicting battery output |
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