KR20190007591A - Battery cooling system and method of electric vehicle - Google Patents

Battery cooling system and method of electric vehicle Download PDF

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Publication number
KR20190007591A
KR20190007591A KR1020170088752A KR20170088752A KR20190007591A KR 20190007591 A KR20190007591 A KR 20190007591A KR 1020170088752 A KR1020170088752 A KR 1020170088752A KR 20170088752 A KR20170088752 A KR 20170088752A KR 20190007591 A KR20190007591 A KR 20190007591A
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battery
cooling
temperature
air
air passage
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KR1020170088752A
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Korean (ko)
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이연우
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이연우
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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
    • B60L58/26—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 by cooling
    • B60L11/1874—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • B60L2240/545—Temperature
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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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  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Automation & Control Theory (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)

Abstract

Disclosed is a battery cooling device of an electric vehicle and a method thereof. The battery cooling device of the electric vehicle and the method thereof comprise: an air path provided at a position adjacent to a battery to cool the battery by flowing air therein; a first cooling fan provided at an inlet side of the air path for suctioning external air; a second cooling fan provided at an external side of the air path for discharging the air in the air path to the outside; and a control part for sensing a temperature of the battery and controlling the first and second cooling fans to cool the battery. Index words are battery, electricity, vehicle, control, cooling, and cooling fan.

Description

전기자동차의 배터리 냉각장치 및 방법{Battery cooling system and method of electric vehicle}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery cooling system,

본 발명의 목적은 상기 전술한 바와 같은 문제점들을 해결하기 위해 창출된 것으로서, 배터리를 냉각시키기 위한 공기통로의 양측에 냉각팬을 각각 구비함으로써 배터리를 효율적으로 냉각시킬 수 있는 전기자동차용 배터리의 냉각장치 및 방법을 제공하는데 있다,It is an object of the present invention to provide a cooling device for a battery for an electric vehicle capable of efficiently cooling a battery by providing cooling fans on both sides of an air passage for cooling the battery, And a method,

본 발명은 배터리 냉각장치 및 방법에 관한 것으로, 더욱 상세하게는 배터리를 냉각시기 위한 공기통로의 양측에 냉각팬을 구비함으로써 배터리를 효율적으로 냉각시킬 수 있는 배터리 냉각장치 및 방법에 관한 것이다.The present invention relates to a battery cooling apparatus and method, and more particularly, to a battery cooling apparatus and method capable of efficiently cooling a battery by providing a cooling fan on both sides of an air passage for cooling the battery.

통상적으로, 전기 자동차 혹은 하이브리드 전지자동차에는 대용량의 배터리가 장착된다. 이러한 배터리로는 주로 니켈 메탈 하이드라이드 전지, 리튬이온전지, 리튬이온 폴리머전지 등이 사용되고 있다.Generally, a large-capacity battery is mounted in an electric vehicle or a hybrid battery automobile. As such batteries, a nickel metal hydride battery, a lithium ion battery, and a lithium ion polymer battery are mainly used.

그중, 리튬 이온 폴리머 전지는 다른 전지에 비해 고출력, 고밀도 전지로써 차세대 전지로 각광을 받고 있다.Among them, the lithium ion polymer battery is attracting attention as a next generation battery as a high output and high density battery compared to other batteries.

하지만, 이러한 배터리들은 온도에 따라 성능이 크게 좌우되며, 특히 고온에서는 전해질 분해가 일어나며, 이에 따라 수명이 현저하게 떨어진다. 따라서, 이와 같은 배터리의 온도상승을 방지하기 위한 다양한 방법들이 개발되고 있으며, 그 일예가 도1 에 도시된다. 즉, 배터리(1)가 케이스(2)의 내부에 구비되고, 이러한 케이스(2)에는 배터리(1)를 냉각시키기 위한 공기통로(3)가 배치된다. 그리고, 이러한 공기통로(3)의 후방(Ⅱ)에는 냉각팬(4)이 장착된다However, the performance of these batteries depends on the temperature, and electrolyte decomposition occurs particularly at high temperatures, and thus the lifetime is significantly reduced. Accordingly, various methods for preventing such temperature rise of the battery have been developed and an example thereof is shown in FIG. That is, a battery 1 is provided inside the case 2, and an air passage 3 for cooling the battery 1 is disposed in the case 2. A cooling fan 4 is mounted on the rear II of the air passage 3

따라서, 상기 냉각팬(4)이 구동하는 경우, 공기통로(3)의 내부에 흡입력이 작용하여 공기통로(3)의 전방(Ⅰ)으로부터 공기가 흡입되어 후방(Ⅱ)으로 흐르게 됨으로써, 흐르는 공기들에 의하여 배터리(4)들이 일정 온도 이하로 냉각된다.Therefore, when the cooling fan 4 is driven, a suction force acts on the inside of the air passage 3 to draw air from the front I of the air passage 3 and flow to the rear II, The batteries 4 are cooled to a certain temperature or lower.

그러나, 이러한그조의 냉각방식은 하나의 냉각팬에 의하여 냉각을 실시하므로 배터리의 온도분포를 줄이는데 한계가 있으며 구조 설정 비용이 많이 소요되는 문제점이 있다.However, since the cooling method of this type of cooling is performed by a single cooling fan, there is a limitation in reducing the temperature distribution of the battery, and there is a problem that it takes a lot of cost to structure.

종래 기술에 따른 전기 자동차용 배터리 및 냉각장치를 도시하는 측면도이다.And is a side view showing a battery and a cooling device for an electric vehicle according to the prior art.

본 발명의 바람직한 실시예에 따른 자동차용 배터리 및 냉각장치를 도시하는 측면도이다. 1 is a side view showing a battery for a vehicle and a cooling device according to a preferred embodiment of the present invention.

본 발명의 바람직한 실시예에 따른 자동차용 배터리의 냉각방법을 도시하는 순서도이다.FIG. 4 is a flowchart illustrating a method of cooling an automobile battery according to a preferred embodiment of the present invention. FIG.

배터리를 냉각시키기 위한 공기통로의 양측에 냉각팬을 각각 구비함으로써 배터리를 효율적으로 냉각시킬 수 있는 전기자동차용 배터리의 냉각장치 및 방법을 제공하는데 있다,A cooling apparatus and method for a battery for an electric vehicle capable of efficiently cooling a battery by providing cooling fans on both sides of an air passage for cooling the battery.

상기와 같은 본 발명에 따른 전기자동차용 배터리의 냉각장치 및 방법은 배터리를 냉각시키기 위한 공기통로의 양측에 냉각팬을 각각 설치하여 온도가 상승하는 배터리 구역에 보다 많은 공기를 공급함으로써 배터리를 효율적으로 냉각시킬 수 있는 장점이 있다. The above and other objects and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: There is an advantage that it can be cooled.

또한, 배터리를 효율적으로 냉각시킬 수 있음으로 가용 에너지의 영역을 넓힐 수 있으며 배터리의 수명을 연장할 수 있는 장점이 있다.In addition, since the battery can be efficiently cooled, the range of available energy can be widened and the life of the battery can be extended.

상기 목적을 달성하기 위하여, 본 발명은 배터리 인접 위치에 구비되어 그 내부에 공기가 유동함으로써 상기 배터리를 냉각시키는 공기통로와; 상기 공기통로의 유입구측에 구비되어 외부 공기를 흡입시키는 제1 냉각팬과; 상기 공기통로의 유출구에 구비되어 상기 공기통로의 공기를 외부로 배출시키는 제2 냉각팬과; 그리고 상기 배터리의 온도를 감지하여 상기 제1 및 제2 냉각팬을 제어함으로써 배터리를 냉각시키는 제어부를 포함하는 전기 자동차의 배터리 냉각장치를 제공한다.In order to achieve the above object, the present invention provides an air conditioner comprising: an air passage provided at a position adjacent to a battery to cool the battery by flowing air therein; A first cooling fan provided at an inlet side of the air passage for sucking outside air; A second cooling fan provided at an outlet of the air passage for discharging air from the air passage to the outside; And a controller for sensing the temperature of the battery and controlling the first and second cooling fans to cool the battery.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 전기자동차용 배터리의 냉각장치 및 방법을 상세하게 설명한다.Hereinafter, a cooling apparatus and method of a battery for an electric vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도2 및 도3 에 도시된 바와 같이, 배터리(Battery;10)의 냉각장치는 케이스(Case;12)의 내부에 적절하게 배치되며, 케이스(12)의 상, 하부에는 공기를 유동시키기 위한 공기통로(15)가 배치된다.2 and 3, the cooling apparatus of the battery 10 is appropriately disposed inside the case 12, and the upper and lower portions of the case 12 are provided with a reservoir (15) is disposed.

(15) for flowing air is arranged in upper and lower part of the case (12). (15) for flowing air is arranged in upper and lower part of the case (12).

그리고, 이러한 공기통로(15)는 전방(Ⅰ)에 형성된 유입구(16)로부터 공기가 흡입되어 후방(Ⅱ)에 형성된 유출구(19)로 흐르게 됨으로써 배터리(10)들을 일정 온도 이하로 냉각시킨다.The air passage 15 sucks air from the inlet 16 formed at the front I and flows to the outlet 19 formed at the rear II to cool the batteries 10 to a predetermined temperature or less.

또한, 상기 유입구(16) 및 유출구(19)에는 냉각팬(18,20)이 각각 설치됨으로써 공기를 공기통로(15)로 흡입 혹은 배출시킨다.Cooling fans 18 and 20 are installed in the inlet 16 and the outlet 19 to suck or discharge the air into the air passage 15, respectively.

보다 상세하게 설명하면, 상기 배터리 케이스(12)는 그 상부 및 하부에 형성되어 공기가 흐르는 공기통로(15)와, 상기 공기통로(15)의 유입구에 설치되어 공기를 흡입시키는 제1 냉각팬(18)과, 상기 공기통로(15)의 유출구(19)에 설치되어 공기를 배출시키는제2 냉각팬(20)과, 상기 배터리(10)의 온도를 감지하여 상기 제1 및 제2 냉각팬(18,20)을 적절하게 구동시키는 제어부(도시안됨)를 포함한다.The battery case 12 includes an air passage 15 formed at an upper portion and a lower portion thereof for flowing air and a first cooling fan 15 installed at an inlet of the air passage 15 to draw in air A second cooling fan 20 installed at an outlet 19 of the air passage 15 for discharging air and a second cooling fan 20 for sensing the temperature of the battery 10, (Not shown) for appropriately driving the light sources 18, 20.

따라서, 상기 제1 및 제2 냉각팬(18,20)이 구동하는 경우, 공기통로(15)의 내부에 흡입력이 작용하여 공기통로(15)의 전방(Ⅰ)으로부터 공기가 흡입되어 후방(Ⅱ)으로 흐르게 됨으로써, 흐르는 공기들에 의하여 배터리(10)들이 일정 온도 이하로 냉각된다.Therefore, when the first and second cooling fans 18 and 20 are driven, a suction force acts on the interior of the air passage 15 to suck air from the front I of the air passage 15, , The batteries 10 are cooled to a certain temperature or lower by the flowing air.

이때, 상기 제1 및 제2 냉각팬(18,20)은 1단 및 2단의 가감속 제어가 가능한 구조를 갖음으로 온도조건에 따라 공기를 효율적으로 유동시킬 수 있다.At this time, the first and second cooling fans 18 and 20 have a structure capable of one-stage and two-stage acceleration / deceleration control, so that it is possible to efficiently flow air according to temperature conditions.

한편, 상기 배터리(10)의 각 부분에는 배터리(10)의 온도를 감지하는 적어도 하나 이상의 온도센서(T1 내지 T6)가 구비되며, 이러한 온도센서(T1 내지 T6)들은 제어부(도시안됨)와 연결된다.At least one or more temperature sensors T1 to T6 for sensing the temperature of the battery 10 are provided in each portion of the battery 10. The temperature sensors T1 to T6 are connected to a controller do.

따라서, 상기 제어부(19)는 상기 온도센서(T1 내지 T6)로부터 신호를 접수함으로써 배터리(10)의 각 부분의 온도를 인식하게 되며, 이러한 신호에 의하여 상기 제1 및 제2 냉각팬(18,20)을 구동시킴으로써 공기통로(15)의 공기 유동량을 조절하여 배터리(10)를 효율적으로 냉각시킬 수 있다.Accordingly, the controller 19 recognizes the temperature of each part of the battery 10 by receiving a signal from the temperature sensors T1 to T6. By this signal, the first and second cooling fans 18, 20, the amount of air flow in the air passage 15 can be controlled to efficiently cool the battery 10.

즉, 공기통로(15)의 전방측(Ⅰ)에 설치되는 온도센서(T1,T2)의 온도가 후방측(Ⅱ)보다 높은 경우 상기 제어부(도시안됨)는 제1 냉각팬(18)에 신호를 출력함으로써 제1 냉각팬(18)을 보다 빠르게 회전시킨다. 따라서, 전방측(Ⅰ)의 공기 유입량이 증가함으로써 이 구역의 배터리(10)가 냉각된다. That is, when the temperature of the temperature sensors T1 and T2 provided on the front side I of the air passage 15 is higher than the rear side II, the control unit (not shown) Thereby rotating the first cooling fan 18 faster. Therefore, the amount of air inflow on the front side I increases, so that the battery 10 in this area is cooled.

반면에, 공기통로(15)의 후방측(Ⅱ)에 설치되는 온도센서(T5,T6)의 온도가 전방측(Ⅰ)보다 높은 경우 상기 제어부(도시안됨)는 제2 냉각팬(20)에 신호를 출력함으로써 제2 냉각팬(20)을 보다 빠르게 회전시킨다. On the other hand, when the temperature of the temperature sensors T5 and T6 provided on the rear side II of the air passage 15 is higher than the front side I, the control unit (not shown) And outputs the signal to rotate the second cooling fan 20 faster.

따라서, 후방측(Ⅱ)의 공기 유입량이 증가함으로써 이 구역의 배터리(10)가 냉각된다.Therefore, the amount of air inflow on the rear side (II) increases, so that the battery 10 in this area is cooled.

그리고, 전방 및 후방측(Ⅰ,Ⅱ)의 온도가 균일한 상태인 경우에는 상기 제어부(도시안됨)는 제1 및 제2 냉각팬(18,20)을 균일하게 작동시킴으로써 배터리(10)의 전, 후부가 균일하게 냉각되도록 한다.When the temperatures of the front and rear sides I and II are uniform, the control unit (not shown) operates the first and second cooling fans 18 and 20 uniformly, , So that the rear portion is uniformly cooled.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 전기 자동차의 배터리 냉각장치의 냉각방법에 대하여 더욱 상세하게 설명한다.Hereinafter, a method of cooling a battery cooling apparatus of an electric vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도2 및 도3 에 도시된 바와 같이, 본 발명이 제안하는 배터리 냉각장치에 의하여 배터리(10)를 냉각하는 경우, 먼저 제어부(도시안됨)는 온도센서(T1 내지 T6)를 통하여 배터리(10)의 각 부위의 온도를 감지하게 된다(S100) 2 and 3, when the battery 10 is cooled by the battery cooling apparatus proposed by the present invention, the controller (not shown) controls the temperature of the battery 10 through the temperature sensors T1 to T6, (S100)

감지결과, 다음식을 만족하는지 여부를 판단하게 된다(S110).As a result of the detection, it is determined whether the above condition is satisfied (S110).

즉, T1부위의 온도가 가장 높고 점차로 하강하여 T6의 온도가 가장 낮다고 판단되는 경우, 다음의 조건을 만족하는지를 판단하게 된다(S120).That is, if it is determined that the temperature of the T1 region is the highest and the temperature of the T6 region is gradually decreased to the lowest temperature, it is determined whether the following condition is satisfied (S120).

｜ (T1+T2) - (T5+T6) ｜>2*const1 ----- equation 2 (const1:5)| (T1 + T2) - (T5 + T6) |> 2 * const1 ----- equation 2 (const1: 5)

상기 조건을 만족하는 경우, 배터리(10)의 T1 부위가 가장 온도가 높다는 의미이므로 상기 제어부(도시안됨)는 제어신호를 송출하여 상기 제1 냉각팬(18)을 2단 상태로 구동시킨다(S124).When the above condition is satisfied, since the T1 region of the battery 10 has the highest temperature, the control unit (not shown) sends a control signal to drive the first cooling fan 18 to the two-stage state (S124 ).

이와 같이, 제1 냉각팬(18)을 2단으로 구동시키면, 공기통로(15)의 전방측(Ⅰ)의 공기의 유량이 증가하게 되므로 이 구역의 온도가 하강함으로써 배터리(10)가 과열되는 것을 방지할 수 있다Thus, when the first cooling fan 18 is driven in two stages, the flow rate of the air on the front side I of the air passage 15 is increased, so that the temperature of this zone is lowered and the battery 10 is overheated Can prevent

상기 조건식 2에 해당하지 않는 경우에는 제1 냉각팬을 1 단 상태로 구동시키도록 제어한다(S122).If the condition is not satisfied, control is performed so that the first cooling fan is driven in the first-stage state (S122).

한편, 상기 조건식 1에 해당하지 않는 경우에는, 다음의 조건을 만족하는지 여부를 판단하게 된다(S130).On the other hand, if the condition is not satisfied, it is determined whether the following condition is satisfied (S130).

T1〈T2〈T3〈T4〈T5〈T6 ------식 T1 즉, 후방측(Ⅱ)의 온도가 가장 높은지 여부를 판단하게 되며, 이 조건을 만족하는 경우에는 다시 다음의 조건식에 해당하는지를 판단하게 된다(S140).T1 <T2 <T3 <T4 <T5 <T6 ------ It is judged whether the temperature of the rear side (II) is the highest or not. If this condition is satisfied, (S140).

｜ (T1+T2) - (T5+T6) ｜>2*const1 ----- equation 4.상기 조건식을 만족하는 경우, 즉 공기통로(15)의 후방측(Ⅱ)의 온도가 상승하는 경우에는 제2 냉각팬(20)을 2단으로 구동하도록 제어한다(S144)그리고, 상기 조건식에 해당하지 않는 경우, 즉 온도가 상기한 단계(S144)에 비교하여 낮은 경우에는 제2 냉각팬(20)을 1단 상태로 구동하도록 제어한다(S142). 또한, 상기 조건식 3에 해당하지 않는 경우에는 다음 조건에 해당하는지 여부를 판단하게 된다(S150).Equation 4. If the above condition is satisfied, that is, when the temperature of the rear side (II) of the air passage 15 rises, the following equation is satisfied: (T1 + T2) - (T5 + T6) (S144). When the condition is not satisfied, that is, when the temperature is lower than the above-mentioned step S144, the second cooling fan 20 (Step S142). If the condition is not satisfied, it is determined whether the following condition is met (S150).

상기 조건을 만족하는 경우, 즉 배터리(10)의 중간부 온도가 양단부보다 높은 경우 다음 조건에 해당하는지를 판단하게 된다(S160).If the above condition is satisfied, that is, if the temperature of the intermediate portion of the battery 10 is higher than both ends, it is determined whether the following condition is met (S160).

｜T1-T3｜〉const2 & ｜T6-T4｜〉const2 ----- 식6 ｜T1-T3｜>const2 & ｜T6-T4｜>const2 ----- equation 6.| T1-T3 |> const2 & | T6-T4 |> const2 ----- Equation 6 | T1-T3 |> const2 & | T6-T4 |> const2 ----- Equation 6.

이 조건을 만족하는 경우에는 제1 냉각팬(18)을 1단 상태로 제어하고, 일정 시간 동안 시간지연을 하게 된다(S164).When this condition is satisfied, the first cooling fan 18 is controlled to the one-stage state and the time delay is performed for a predetermined time (S164).

그리고, 제2 냉각팬(20)을 2단 상태로 구동하도록 제어하고 일정 시간동안 시간 지연을 하게 된다.(S163) .Then, the second cooling fan 20 is controlled to be driven in a two-stage state and a time delay is performed for a predetermined time (S163).

또한, 상기 식5에 해당하지 않는 경우에도(S150) 상기한 바와 같이 제1 냉각팬(18)을 1단 상태로 제어하고, 일정 시간 동안 시간지연을 하게 된다(S164).Even if it does not correspond to Equation 5, the first cooling fan 18 is controlled to the one-stage state as described above and the time delay is performed for a predetermined time (S164).

그리고, 제2 냉각팬(20)을 1단 상태로 구동하도록 제어하고 일정 시간 동안 시간지연을 하게 된다(S166).Then, the second cooling fan 20 is controlled to be driven in the one-stage state and a time delay is performed for a predetermined time (S166).

상기한 바와 같이, 제어부(도시안됨)가 제1 및 제2 냉각팬(18,20)을 각 온도조건에 따라 적절하게 제어함으로써 배터리(10)의 각 부위를 효율적으로 냉각시키게 된다As described above, the control unit (not shown) appropriately controls the first and second cooling fans 18 and 20 according to the respective temperature conditions, thereby efficiently cooling the respective portions of the battery 10

Claims (1)

전원 공급시 배터리 온도를 감지하는 제1 단계와; 온도 감지 결과, 배터리의 전방 및 후방의 온도가 다음 조건에 해당하는 지 여부를 판단하는 제2 단계와; T1〉T2〉T3〉T4〉T5〉T6 ------식1 (T1: 전방, T6:후방)상기 제2 단계를 만족하는 경우, 공기통로의 T1부위에(전방) 공기유량을 증가시킬 수 있도록 제1 냉각팬을 구동시키는 제3 단계와;상기 제2 단계에 해당하지 않는 경우, 배터리의 전방 및 후방의 온도가 다음 조건에 해당하는지 여부를 판단하는 제4 단계와;T1〈T2〈T3〈T4〈T5〈T6 ------식2상기 제4 단계를 만족하는 경우, 공기통로의 T6 부위에(후방) 공기유량을 증가시킬 수 있도록 제2 냉각팬을 구동시키는 제5 단계와; 그리고상기 제4 단계에 해당하지 않는 경우, 배터리의 중간부가 전방 및 후방보다 온도가 높다고 판단하여 제1 및 제2 냉각팬을 2 단상태로 구동하고 시간지연을 실시하는 제6 단계를 포함하는 전기 자동차의 배터리 냉각방법A first step of sensing a battery temperature when power is supplied; A second step of determining whether the temperatures of the front and rear of the battery correspond to the following conditions; T1 (forward), T6 (rear) If the above-mentioned second step is satisfied, the (forward) air flow rate is increased at the T1 region of the air passage A fourth step of determining whether the temperature of the front and the rear of the battery corresponds to the following condition if it is not the second step; (5) driving the second cooling fan to increase the air flow rate (rearward) at the T6 portion of the air passage when the fourth step is satisfied, &lt; T3 &; And a sixth step of determining that the intermediate portion of the battery is higher in temperature than the front and rear portions of the battery and driving the first and second cooling fans in a two-stage state and performing a time delay if the fourth step does not correspond to the fourth step How to cool battery in car
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