JP6793156B2 - 車両用電源装置 - Google Patents
車両用電源装置 Download PDFInfo
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- JP6793156B2 JP6793156B2 JP2018123946A JP2018123946A JP6793156B2 JP 6793156 B2 JP6793156 B2 JP 6793156B2 JP 2018123946 A JP2018123946 A JP 2018123946A JP 2018123946 A JP2018123946 A JP 2018123946A JP 6793156 B2 JP6793156 B2 JP 6793156B2
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- 238000010248 power generation Methods 0.000 claims description 117
- 230000005856 abnormality Effects 0.000 claims description 45
- 230000002159 abnormal effect Effects 0.000 claims description 24
- 239000007858 starting material Substances 0.000 description 87
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 67
- 229910001416 lithium ion Inorganic materials 0.000 description 67
- 238000000034 method Methods 0.000 description 19
- 238000002485 combustion reaction Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 230000001172 regenerating effect Effects 0.000 description 10
- 230000006266 hibernation Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000994 depressogenic effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/15—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with additional electric power supply
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- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/04—Arrangement of batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0825—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
- F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/10—Safety devices
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
- G05D1/0055—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots with safety arrangements
- G05D1/0061—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots with safety arrangements for transition from automatic pilot to manual pilot and vice versa
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- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/08—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing being of friction type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
- F02N2200/061—Battery state of charge [SOC]
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
- G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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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
- 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
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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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- Radar, Positioning & Navigation (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Control Of Charge By Means Of Generators (AREA)
- Direct Current Feeding And Distribution (AREA)
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Description
図1は本発明の一実施の形態である車両用電源装置10が搭載された車両11の構成例を示す概略図である。図1に示すように、車両11には、エンジン12および変速機構13等を備えたパワーユニット14が搭載されている。エンジン12のクランク軸15には、ベルト機構16を介してスタータジェネレータ(発電機,発電電動機)17が連結されている。また、エンジン12にはトルクコンバータ18を介して変速機構13が連結されており、変速機構13にはデファレンシャル機構19等を介して車輪20が連結されている。
車両用電源装置10が備える電源回路30について説明する。図2は電源回路30の一例を簡単に示した回路図である。図2に示すように、電源回路30は、スタータジェネレータ17に電気的に接続されるリチウムイオンバッテリ(第1蓄電体)31と、これと並列にスタータジェネレータ17に電気的に接続される鉛バッテリ(第2蓄電体)32と、を備えている。なお、リチウムイオンバッテリ31を積極的に放電させるため、リチウムイオンバッテリ31の端子電圧は、鉛バッテリ32の端子電圧よりも高く設計されている。また、リチウムイオンバッテリ31を積極的に充放電させるため、リチウムイオンバッテリ31の内部抵抗は、鉛バッテリ32の内部抵抗よりも小さく設計されている。
図3は車両11の制御系の一例を示すブロック図である。図3に示すように、車両11には、前述したISGコントローラ23やバッテリコントローラ55だけでなく、エンジン12の作動状態を制御するエンジン12コントローラ60や、変速機構13の作動状態を制御するミッションコントローラ61が設けられている。また、車両11には、車輪20の制動力を調整するブレーキアクチュエータ62を制御するブレーキコントローラ63や、車輪20の操舵角を調整するステアリングアクチュエータ64を制御するステアリングコントローラ65が設けられている。さらに、車両11には、各コントローラ23,55,60,61,63,65を統括して制御するメインコントローラ70が設けられている。これらのコントローラ23,55,60,61,63,65,70は、マイコン等によって構成されるとともに、CANやLIN等の車載ネットワーク66を介して互いに通信自在に接続されている。
続いて、スタータジェネレータ17の発電制御について説明する。メインコントローラ70のISG制御部71は、リチウムイオンバッテリ31の充電状態S_LiBに基づいて、スタータジェネレータ17の目標発電電圧を設定する。そして、メインコントローラ70は、目標発電電圧をISGコントローラ23に出力し、スタータジェネレータ17を後述する燃焼発電状態や発電休止状態に制御する。
続いて、鉛バッテリ32の異常状態について説明する。図8は鉛バッテリ32の異常状態の一例を示す図である。まず、前述した図7に示すように、スタータジェネレータ17を力行状態に制御する際には、スイッチSW1がOFF状態に切り替えられる。この場合であっても、電気機器群44には鉛バッテリ32から電流が供給されることから、電気機器群44を正常に機能させることができる。しかしながら、図8に矢印αで示すように、鉛バッテリ32に端子外れ等の異常が発生していた場合には、鉛バッテリ32から電気機器群44に電流を供給することができないため、スイッチSW1のOFF状態への切り替え等を禁止することが必要である。
鉛バッテリ32の異常の有無を判定する異常判定処理について説明する。この異常判定処理は、メインコントローラ70によって所定周期毎に実行される。ここで、図9は異常判定処理の実行手順の一例を示すフローチャートである。
鉛バッテリ32に異常が発生した場合のフェイルセーフ処理について説明する。このフェイルセーフ処理は、メインコントローラ70によって所定周期毎に実行される。ここで、図10はフェイルセーフ処理の実行手順の一例を示すフローチャートである。
以下、ステップS21における発電閾値変更について詳細に説明する。まず、図4に示したように、リチウムイオンバッテリ31の充電状態S_LiBが低下すると、スタータジェネレータ17は燃焼発電状態に切り替えられる。スタータジェネレータ17の燃焼発電状態においては、発電電圧がリチウムイオンバッテリ31の端子電圧よりも上げられ、リチウムイオンバッテリ31が充電される。一方、図5に示したように、リチウムイオンバッテリ31の充電状態S_LiBが上昇すると、スタータジェネレータ17は発電休止状態に切り替えられる。スタータジェネレータ17の発電休止状態においては、発電電圧がリチウムイオンバッテリ31の端子電圧よりも下げられ、リチウムイオンバッテリ31の放電が促される。
図13は鉛バッテリ異常時における充電状態S_LiBの推移の一例を示す図である。前述の図12に示した例では、鉛バッテリ32の異常時において、発電閾値S2aや休止閾値S2bを高めることにより、スタータジェネレータ17が発電休止状態に制御されることを抑制しているが、これに限られることはない。例えば、鉛バッテリ32に異常が発生していると判定された場合には、スタータジェネレータ17の発電休止状態を禁止しても良い。この場合には、スタータジェネレータ17が燃焼発電状態に維持されることになる。すなわち、エンジン動力によってスタータジェネレータ17が発電駆動され続けるため、図13に示すように、リチウムイオンバッテリ31の充電状態S_LiBは、100%およびその近傍を推移することになる。
11 車両
12 エンジン
17 スタータジェネレータ(発電機,発電電動機)
31 リチウムイオンバッテリ(第1蓄電体)
32 鉛バッテリ(第2蓄電体)
44 電気機器群
45 バッテリセンサ(蓄電体センサ)
51 第1電源系
52 第2電源系
71 ISG制御部(発電制御部,アシスト制御部)
73 アイドリング制御部
74 運転制御部
75 異常判定部
SW1 第1スイッチ(スイッチ)
i_PbB 放電電流
ia 電流閾値
S_LiB 充電状態
S1a 発電閾値(第1閾値)
S2a 発電閾値(第2閾値)
S1b 休止閾値
Claims (3)
- 車両に搭載される車両用電源装置であって、
エンジンに連結される発電機、および前記発電機に接続される第1蓄電体、を備える第1電源系と、
前記第1蓄電体に並列接続される第2蓄電体、および前記第2蓄電体に接続される電気機器群、を備える第2電源系と、
前記第1電源系と前記第2電源系とを接続するオン状態と、前記第1電源系と前記第2電源系とを切り離すオフ状態と、に制御されるスイッチと、
前記第2蓄電体の負極ラインに設けられ、前記第2蓄電体の電流を検出する蓄電体センサと、
前記蓄電体センサが正常であり、かつ前記スイッチがオン状態に制御された状態のもとで、前記第2蓄電体の放電電流が電流閾値以下である場合に、前記第2蓄電体が端子外れ又は断線による異常であると判定する異常判定部と、
前記第1蓄電体の充電状態が発電閾値を下回る場合に、前記発電機の発電電圧を前記第1蓄電体の端子電圧よりも上げる一方、前記第1蓄電体の充電状態が休止閾値を上回る場合に、前記発電機の発電電圧を前記第1蓄電体の端子電圧よりも下げる発電制御部と、
を有し、
前記第2蓄電体が正常である場合には、前記前記発電閾値として第1発電閾値が設定され、前記休止閾値として前記第1発電閾値よりも大きな第1休止閾値が設定され、
前記第2蓄電体が異常である場合には、前記スイッチのオフ状態への制御が禁止され、前記発電閾値として前記第1休止閾値よりも大きな第2発電閾値が設定され、前記休止閾値として前記第2発電閾値よりも大きな第2休止閾値が設定される、
車両用電源装置。 - 請求項1に記載の車両用電源装置において、
前記電流閾値は、前記電気機器群が停止している状態のもとで、前記第2蓄電体から放電される電流値よりも小さく設定される、
車両用電源装置。 - 請求項2に記載の車両用電源装置において、
前記電流閾値は、100mAである、
車両用電源装置。
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