WO2008066092A1 - Secondary battery charge/discharge control device and vehicle using the same - Google Patents
Secondary battery charge/discharge control device and vehicle using the same Download PDFInfo
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- WO2008066092A1 WO2008066092A1 PCT/JP2007/073006 JP2007073006W WO2008066092A1 WO 2008066092 A1 WO2008066092 A1 WO 2008066092A1 JP 2007073006 W JP2007073006 W JP 2007073006W WO 2008066092 A1 WO2008066092 A1 WO 2008066092A1
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/445—Differential gearing distribution type
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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
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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
- 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
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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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
- 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
- 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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
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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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/44—Drive Train control parameters related to combustion engines
- B60L2240/441—Speed
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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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
- B60W2510/00—Input parameters relating to a particular sub-units
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- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
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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
- B60W2510/00—Input parameters relating to a particular sub-units
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- B60W2510/242—Energy storage means for electrical energy
- B60W2510/246—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
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- B60W2710/00—Output or target parameters relating to a particular sub-units
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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
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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
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Definitions
- the present invention relates to a charge / discharge control device for a secondary battery and a vehicle including the same, and more particularly to a technique for controlling charge / discharge power based on the temperature of the secondary battery.
- Electric vehicles that obtain all or part of the vehicle's driving force with an electric motor are equipped with a secondary battery, and the electric motor is driven by the electric power stored in the secondary battery. ing.
- a function unique to such electric vehicles is regenerative braking.
- regenerative braking the vehicle's kinetic energy is converted into electric energy by causing the motor to function as a generator during vehicle braking, and braking is performed.
- the obtained electric energy is stored in the secondary battery and reused for acceleration. Therefore, according to regenerative braking, it is possible to recycle the energy that has been dissipated into the atmosphere as thermal energy in a vehicle that runs only with a conventional internal combustion engine, greatly improving energy efficiency. be able to.
- the secondary battery in order to store the electric power generated during regenerative braking effectively in the secondary battery, the secondary battery needs to have enough margin.
- the electric power stored in the secondary battery that is, the stored electricity
- the amount can be controlled freely. Therefore, in such a hybrid vehicle, the amount of power stored in the secondary battery can be fully charged so that regenerative power can be accepted and power can be supplied to the motor immediately if required. It is desirable to be controlled in the vicinity of the middle (50 to 60%) between 0%) and the state where no electricity is stored (0%). Secondary batteries installed in electric vehicles will be used in various usage environments.
- the secondary battery When used in cold regions, it may be used in an environment of 110 ° C or less, and sometimes 120 ° C or less. Also, when used at high temperatures or for secondary batteries If the secondary battery temperature rises further, it may be used in an environment of 40 ° C or higher.
- control according to the characteristics of the secondary battery is required. In particular, when the temperature is low, the speed of the chemical reaction in the secondary battery decreases. Therefore, when a large current is applied, the voltage decreases and the necessary voltage cannot be obtained. Moreover, there is a problem that the secondary battery deteriorates at high temperatures. ,
- Japanese Patent Application Laid-Open No. 2 0 3-2 1 9 5 1 0 discloses a charge / discharge control device for a secondary battery capable of performing appropriate charge / discharge management according to the use environment of the battery and the state of the battery.
- the secondary battery charge / discharge control device disclosed in the above document includes a temperature detection unit that detects the temperature of the secondary battery, and a predetermined temperature when the detected temperature is equal to or lower than a predetermined temperature.
- a charge / discharge power limiting unit that controls the charge / discharge power so as not to exceed the charge / discharge power upper limit value that changes.
- the charge / discharge power limiting unit sets the upper limit value so that the upper limit value of the charge / discharge power decreases as the temperature of the secondary battery increases. Determine. As a result, it is possible to prevent further increase in battery temperature, and it is possible to suppress deterioration of the battery.
- Japanese Patent Laid-Open No. 20 0 3-2 1 9 5 10 the electric power that can be taken out from the secondary battery changes according to the temperature of the secondary battery. If it is possible to extract power from the secondary battery without limiting by temperature, it is preferable because the performance of the secondary battery can be extracted more effectively.
- Japanese Patent Application Laid-Open No. 2003-21095 does not particularly disclose such a method.
- An object of the present invention is to provide a charge / discharge control device for a secondary battery that can more effectively bring out the performance of the secondary battery, and a vehicle including the charge / discharge control device.
- the present invention relates to a charge / discharge control device for a secondary battery, a temperature detection unit for detecting the battery temperature of the secondary battery, and a state in which the charge state of the secondary battery is detected to indicate the charge state.
- a charge state detection unit that outputs a state value; and a setting unit.
- the setting unit changes the charge power of the secondary battery to the state value.
- the charging power increases, and when the state value reaches the second value, the charging power value is set to the first limit value.
- the setting unit increases the discharge power of the secondary battery as the state value increases, and the discharge power increases when the state value reaches the third value.
- the setting unit determines at least one of the first value, the second value, and the third value as a change target that changes according to the battery temperature detected by the temperature detection unit, and the battery temperature is high. Increase the value to be changed.
- the setting unit determines a change target from the first to third values based on the distribution of state values.
- the setting unit determines the second value to be changed when the frequency at which the state value becomes smaller than the first value is higher than the frequency at which the state value becomes larger than the first value, and the state value If the frequency at which the value is greater than the first value is higher than the frequency at which the state value is smaller than the first value, the third value is determined to be changed.
- the setting unit determines the first value to be changed when switching between charging the secondary battery and discharging the secondary battery is repeated a predetermined number of times or more within a predetermined period.
- the secondary battery includes a lithium ion battery.
- a vehicle includes a secondary battery and a secondary battery charge / discharge control device.
- the charge / discharge control device includes: a temperature detection unit that detects a battery temperature of the secondary battery; a charge state detection unit that detects a charge state of the secondary battery and outputs a state value indicating the charge state; a setting unit; including.
- the setting unit determines the charge power of the secondary battery as The charging power increases as the power decreases, and the charging power is set to the first limit when the state value reaches the second value.
- the setting unit increases the discharge power of the secondary battery as the state value increases, and the state level reaches the third value.
- the discharge power value is set to the second limit value.
- the setting part has the first value, the second value, 200
- At least one of the third values is determined as a change target that changes according to the battery temperature detected by the temperature detection unit, and the value to be changed is increased as the battery temperature increases.
- the setting unit determines a change target from the first to third values based on the distribution of state values.
- the setting unit determines the second value to be changed when the frequency at which the state value becomes smaller than the first value is higher than the frequency at which the state value becomes larger than the first value, and the state value If the frequency at which the value becomes larger than the first value is higher than the frequency at which the state value becomes smaller than the first value, the third value is determined to be changed.
- the setting unit determines the first value to be changed when the switching between the charging of the secondary battery and the discharging of the secondary battery is repeated more than a predetermined number of times within a predetermined period.
- the secondary battery includes a lithium ion battery.
- a charge / discharge control device for a secondary battery, a temperature detection unit for detecting a battery temperature of the secondary battery, and a charge state detection unit for detecting a charge state of the secondary battery And a setting unit for setting battery power to be charged / discharged by the secondary battery based on the battery temperature detected by the temperature detection unit and the charging state detected by the charging state detection unit.
- the setting unit charges the secondary battery when the state of charge is lower than the first value, the first value indicating the state of charge when the secondary battery discharge and the secondary battery charge are switched.
- the setting unit sets the battery power based on the first to third values and the state of charge detected by the state of charge detection unit.
- the setting unit determines a setting target value from the first to third values based on a distribution of values of the charging state detected by the charging state detection unit.
- the setting unit determines the second value as the setting target value when the frequency at which the state of charge is smaller than the first value is higher than the frequency at which the state of charge is larger than the first value.
- the third value is determined as the setting target value. More preferably, the setting unit determines the first value as the setting target value when switching between charging the secondary battery and discharging the secondary battery is repeated a predetermined number of times or more within a predetermined period.
- the secondary battery includes a lithium ion battery.
- a vehicle includes a secondary battery and a secondary battery charge / discharge control device.
- the charge / discharge control device includes a temperature detection unit that detects a battery temperature of the secondary battery, a charge state detection unit that detects a charge state of the secondary battery, a battery temperature detected by the temperature detection unit, and a charge state And a setting unit that sets battery power to be charged and discharged by the secondary battery based on the state of charge detected by the detection unit.
- the setting unit charges the secondary battery when the state of charge drops below the first value, which is the first value that indicates the state of charge when switching between secondary battery discharge and secondary battery charge.
- the setting unit sets the battery power based on the first to third values and the state of charge detected by the state of charge detection unit.
- the setting unit determines a setting target value from the first to third values based on a distribution of values of the charging state detected by the charging state detection unit.
- the setting unit determines the second value as the setting target value when the frequency at which the state of charge is smaller than the first value is higher than the frequency at which the state of charge is larger than the first value.
- the third value is determined as the setting target value.
- the setting unit determines the first value as the setting target value when switching between charging the secondary battery and discharging the secondary battery is repeated a predetermined number of times or more within a predetermined period.
- the secondary battery includes a lithium ion battery.
- FIG. 1 is a schematic block diagram of a vehicle including the secondary battery charge / discharge control device according to the first embodiment.
- FIG. 2 is a functional block diagram of the control device 30 shown in FIG.
- FIG. 3 is a diagram for explaining the control of SOC by the charge / discharge control device of the present embodiment.
- FIG. 4 is a diagram for explaining control of battery power by the charge / discharge control device of the present embodiment.
- FIG. 5 is a general diagram showing the relationship between the S 0 C value and the open circuit voltage of the battery.
- FIG. 6 is a diagram showing fluctuations in battery voltage when battery SOC and input / output power fluctuate as shown in FIG. 3 and FIG.
- FIG. 7 is a diagram showing fluctuations in battery current when the battery voltage fluctuates as shown in FIG.
- FIG. 8 is a flowchart for explaining the determination process of the power value Pin / Pout by the battery power determination unit 1 3 3 of FIG.
- FIG. 9 is a diagram showing a map M P 0 stored in the map storage unit 1 3 6.
- FIG. 10 is a diagram showing the distribution of SOC values when the battery power determination unit 1 3 3 of FIG. 2 performs charging / discharging according to the map MP 0 of FIG.
- FIG. 11 is a diagram showing one modification of the map M P 0 shown in FIG.
- FIG. 12 is a diagram showing the distribution of S OC values when the battery power determination unit 1 3 3 of FIG. 2 determines the battery power based on the map MP 1 shown in FIG.
- FIG. 13 is a diagram showing another modification of the map M P 0 shown in FIG.
- FIG. 14 is a diagram showing the distribution of S OC values when battery power determination unit 1 3 3 of FIG. 2 determines battery power based on map MP 2 shown in FIG.
- FIG. 15 is a diagram showing still another modification of the map M P 0 shown in FIG.
- FIG. 16 is a diagram showing the distribution of S0C values when the battery power determination unit 1 3 3 of FIG. 2 determines the battery power based on the map MP 3 shown in FIG.
- FIG. 17 is a diagram showing still another modification of the map MP 0 shown in FIG.
- FIG. 18 is a diagram showing the distribution of S0C values when the battery power determination unit 1 3 3 of FIG. 2 determines the battery power based on the map MP 4 shown in FIG.
- FIG. 19 is a flowchart for explaining the process of determining the power value P in / P out by the battery power determination unit 133 A of FIG.
- FIG. 20 is a flowchart for explaining a modification of the process of determining the power value Pin / Pout by the battery power determination unit 133A of FIG.
- FIG. 1 is a schematic block diagram of a vehicle including the secondary battery charge / discharge control device according to the first embodiment.
- a vehicle 100 includes an engine 4 that is an internal combustion engine, and a battery unit.
- motor generators MG 1 and MG2 motor generators MG 1 and MG2, inverters 22 and 14 provided for motor generators MG 1 and MG 2, respectively, power split mechanism PSD, boost converter 12, resolvers 20 and 21, current Sensors 24 and 25, a control device 30, and wheels (not shown) are provided.
- Battery unit 40 and boost converter 1 2 are power line P L 1 and ground line
- the battery unit 40 includes a battery B, a system main relay SMR 3 connected between the negative electrode of the battery B and the ground line SL, and a system main connected between the positive electrode of the battery B and the power line PL 1.
- Relay SMR 2 includes system main relay SMR 1 and limiting resistor R connected in series between the positive electrode of battery B and power supply line PL 1.
- System main relays SMR 1 to SMR 3 are controlled to be in a conductive Z non-conductive state in response to a control signal S E supplied from control device 30.
- the battery unit 40 further includes a voltage sensor 10 that measures the voltage VB between the terminals of the battery B.
- a secondary battery such as nickel metal hydride or lithium ion can be used.
- a lithium ion battery it is preferable to use a lithium ion battery as the battery B.
- the temperature sensor 42 may be provided near the battery B.
- the temperature sensor 42 may be provided at a place where the temperature of the battery B can be estimated.
- the temperature sensor 42 is installed, for example, in the vicinity of the power supply line PL 1 (point A), in the vicinity of the rear tower L 1 (point B), in the vicinity of the system main relay SMR 2 (point C), etc. can do.
- Boost converter 12 boosts the voltage between ground line S L and power line P L 1 and supplies it to inverters 14 and 22 through ground line SL and power line PL 2.
- Inverter 14 converts the DC voltage applied from boost converter 12 into a three-phase AC and outputs the same to motor generator MG2.
- Inverter 22 converts the DC voltage supplied from boost converter 12 into a three-phase AC and outputs the same to motor generator M G 1.
- Boost converter 12 includes a smoothing capacitor C 1 having one end connected to power supply line PL 1 and the other end connected to ground line SL, a reactor L 1 having one end connected to power supply line PL 1, and a power supply I GBT elements Q 1 and Q 2 connected in series between line PL 2 and ground line SL, 1 & 8 elements (diodes D 1 and D 2 connected in parallel to 31 and Q 2 respectively, and smoothing Capacitor C 2, voltage sensor 6 for detecting voltage VL between power line PL 1 and ground line SL, voltage sensor 8 for detecting voltage VH between power line PL 2 and ground line SL, and Smoothing capacitor C1 smoothes the DC voltage before being boosted by output from battery B. Smoothing capacitor C'2 smoothes the DC voltage after boost converter 12 boosts.
- reactor 1 The other end of reactor 1 is connected to the emitter of I & 8-cutter element 01 and the collector of I GBT element Q2.
- the power sword of diode D 1 is connected to the I 08 element (31 collectors, the anode of diode D 1 is connected to the emitter of I GBT element Q 1.
- the power sword of diode D 2 is the I GBT element Q 2
- the anode of diode D 2 is connected to the emitter of IGBT element Q 2.
- Inverter 14 is a three-phase DC voltage output from boost converter 12 to motor generator MG 2 that drives the wheel. Inverter 14 outputs the electric power generated by motor generator MG2 during regenerative braking. Return to boost converter 12. At this time, boost converter 12 is controlled by control device 30 so as to operate as a step-down circuit.
- Inverter 14 includes a U-phase arm 15, a V-phase arm 16, and a W-phase arm 17.
- U-phase arm 15, V-phase arm 16, and W-phase arm 17 are connected in parallel between power line P L 2 and ground line S L.
- U-phase arm 15 is composed of I GBT elements Q3 and Q4 connected in series between power line PL 2 and ground line SL, and diodes D 3 connected in parallel with 10: 8 elements 03 and Q 4 respectively. , Including D4.
- the power sword of diode D3 is connected to the collector of I GBT element Q3, and the anode of diode D3 is connected to the emitter of I0: 8 element 03.
- the power sword of diode D4 is connected to the collector of I GBT element Q4, and the anode of diode D4 is connected to the emitter of I GBT element Q4.
- V-phase arm 16 is connected in parallel with I GBT elements Q5, Q6 and 108 elements 05, Q 6 connected in series between power line PL 2 and ground line SL.
- the power sword of diode D 5 is connected to the collector of I GBT element Q 5 and the anode of diode D 5 is I. 8 elements (connected to 35 emitters.
- the power sword of diode D 6 is connected to the collector of I GBT element Q6, and the anode of diode D 6 is connected to the emitter of I GBT element Q 6.
- W-phase arm 1 7 consists of I GBT elements Q 7 and Q 8 connected in series between power line PL 2 and ground line SL, and diode D 7 connected in parallel with 103 elements ⁇ 37 and Q 8 respectively. , D 8 and so on.
- the power sword of diode D 7 is connected to the collector of I GBT element Q 7, and the anode of diode D 7 is connected to the emitter of I GBT element Q 7.
- the power sword of diode D 8 is connected to the collector of I GBT element Q8, and the anode of diode D 8 is connected to the emitter of I GBT element Q 8.
- the motor generator MG 2 is a three-phase permanent magnet synchronous motor, and one end of each of the three coils of the U, V, and W phases is connected to the neutral point.
- the other end of the U-phase coil is connected to the connection node of the I GBT elements Q 3 and Q 4.
- V phase The other end of the coil is connected to the connection node of IGBT elements Q 5 and Q 6.
- the other end of the W-phase coil is connected to the connection node of IGBT elements Q7 and Q8.
- the rotating shaft of motor generator MG2 is coupled to the rear wheel by a reduction gear and a differential gear (not shown).
- Power split device P S D is coupled to the engine and motor generators MG 1 and MG 2 and distributes the power between them.
- the power split mechanism PSD a planetary gear mechanism having three rotation shafts of a sun gear, a planetary carrier and a ring gear can be used. These three rotating shafts are connected to the rotating shafts of the engine and motor generators MG 1 and MG 2, respectively.
- the motor and the motor generators MG 1 and MG 2 can be mechanically connected to the power split mechanism PSD by passing the engine crankshaft through the center of the rotor of the motor generator MG 1 hollow.
- Inverter 22 is connected to boost converter 12 in parallel with inverter 14. Inverter 22 converts the DC voltage output from boost converter 12 to motor generator MG 1 into a three-phase AC and outputs the same. Inverter 22 receives motor boosted voltage from boost converter 12 and drives motor generator MG 1 to start the engine, for example.
- Inverter 22 returns the electric power generated by motor generator MG 1 to boost converter 12 by the rotational torque transmitted from the crankshaft of engine 4. At this time, boost converter 12 is controlled by control device 30 so as to operate as a step-down circuit.
- inverter 22 Although the internal configuration of inverter 22 is not shown, it is similar to inverter 14 and will not be described in detail.
- the motor generator MG 1 is a three-phase permanent magnet synchronous motor, and one end of each of the three coils of the U, V, and W phases is connected to the neutral point. The other end of each phase coil is connected to the inverter 22.
- the current sensor 25 is a motor current value M One ⁇
- Controller 30 receives engine speed MRNE, voltages VB, VL, VH, current I B. values of temperature TB, motor current values MCRT 1 and MCRT 2, and start signal I GON.
- Control device 30 further receives an accelerator opening degree Acc detected by an accelerator position sensor (not shown) and a vehicle speed V detected by a vehicle speed sensor (not shown).
- the control device 30 receives the outputs of the resolvers 20 and 21 and calculates motor rotational speeds MRN 2 and MRN 1 respectively.
- the motor rotational speed MRN 1 and the motor current jjtMCRT 1 are related to the motor generator MG 1
- the motor rotational speed M RN 2 and the motor current value M CRT 2 are related to the motor generator MG 2.
- Voltage VB is the voltage of battery B and is measured by voltage sensor 10.
- the voltage VL is a voltage before boosting of the boosting converter 12 applied to the smoothing capacitor C 1 and is measured by the voltage sensor 6.
- the voltage VH is a boosted voltage of the boost converter 12 applied to the smoothing capacitor C 2 and is measured by the voltage sensor 8.
- Control device 30 outputs control signal PWU for instructing step-up to boost converter 12, control signal PWD for instructing step-down and signal C SDN instructing prohibition of operation.
- control device 30 provides drive instruction PWMI 2 for converting voltage VH (DC voltage), which is the output of boost converter 12 to inverter 14, into AC voltage for driving motor generator MG 2, and motor generator MG 2.
- VH DC voltage
- Regenerative instruction PWMC 2 that converts the AC voltage generated in step 1 into a DC voltage and returns it to the boost converter 12 side is output.
- the I GBT elements Q 3 to Q 8 operate according to these instructions.
- control device 30 provides drive instruction PWMI 1 for converting voltage VH (DC voltage) to inverter 22 to AC voltage for driving motor generator MG 1, and AC voltage generated by motor generator MG 1.
- Regenerative instruction PWMC 1 is output to convert DC to DC voltage and return it to boost converter 1 2 side.
- FIG. 2 is a functional block diagram of control device 30 shown in FIG. The system shown in Fig. 2
- the control device 30 may be realized by hardware or may be realized by software.
- control device 30 includes vehicle request output calculation unit 1 31, S OC (State of Charge) calculation unit 1 32, battery power determination unit 1 33, A driving force distribution determining unit 134, an engine ECU (Electronic Control Unit) 135, a map storage unit 136, a converter control unit 137, and inverter control units 138 and 139 are included.
- S OC State of Charge
- ECU Electronic Control Unit
- the vehicle required output calculation unit 131 is based on the accelerator position Ac c, the vehicle speed V, and the state value (SOC straight) indicating the SOC of the battery B output from the S0C calculation unit 132. Calculate the output required for the entire 100 (ie, the required dynamic power of the vehicle).
- the thirty operation unit 132 calculates the SOC value of the battery B based on the current I B, the voltage VB, and the temperature TB.
- the SOC value is defined as 100% when battery B is fully charged and is defined as 0% when battery B is not charged at all.
- the SOC value is between 0% and 100% depending on the state of charge of battery B when the state of charge of battery B changes from when battery B is not fully charged to when it is fully charged. Defined to change.
- the battery power determination unit 133 determines the power value Pin when charging the battery B and the power value P out when discharging the battery B. To decide. Details of the processing in the battery power determination unit 133 will be described later.
- the map storage unit 136 stores a map in which the SOC and the power value PinZPout are associated with each other.
- the battery power determination unit 133 sets the power value Pin / P out based on the map stored in the map storage unit 136 and the temperature TB.
- the driving force distribution determination unit 1 34 receives the vehicle request output from the vehicle request output calculation unit 1 31. 'The driving force distribution determination unit 134 receives the power value P in or the power value P out from the battery power determination unit 133. The driving force distribution determination unit 134 receives the engine speed MRNE from the engine ECU 13 5. Driving force distribution determination unit 1 34 Determine the torque distribution between engine 4 and motor generators MG 1 and MG 2 for output.
- the driving force distribution determination unit 1 34 uses the vehicle demand output as the demand output of the engine 4 (engine demand output PE req *), and the driving point that can output the engine demand output PE req * ( Of the points determined by the torque and the number of revolutions, the point at which the engine 4 is most efficient (in other words, the engine torque and the number of revolutions) is determined. Then, the driving force distribution determination unit 134 outputs the determined engine speed (target speed MRNE *) to the engine ECU 135 ( the engine ECU 135 thereby outputs the target speed MRNE * and the actual engine speed MRNE). The output of engine 4 (rotation speed X torque) is controlled so that.
- driving force distribution determining unit 134 determines the output of the motor generator (MG1, MG2) based on the engine required output PEreq * and the electric power value Pin / Pout. Then, driving force distribution determination unit 134 determines torque command value TR 2 of motor generator MG 2 based on the output of motor generator (MG1, MG 2). Driving force distribution determining unit 134 outputs torque command value TR 2 to converter control unit 1 37 and inverter control unit 139.
- driving force distribution determining unit 134 When a part of the motive power output from engine 4 is used as electric power for motor generator I / motor MG 1, the electric power generated by motor generator MG 1 is used to drive motor generator MG 2. In this case, driving force distribution determining unit 134 further sets torque command value TR 1 to command the torque required for motor generator MG 1. Then, driving force distribution determination unit 134 outputs torque command value T R 1 to converter control unit 137 and inverter control unit 138.
- Converter control unit 137 receives torque command values TR 1 and TR2 and motor rotation speeds MRN 1 and MRN 2 and outputs control signals PWU and PWD and signal CSDN.
- Inverter control unit 138 receives torque command value TR 1 and motor current value MCR 1 and outputs drive instruction PWMI 1 and regeneration instruction PWMC 1.
- Inverter control unit 1 39 is used for torque command value TR 2 and motor current value MCRT. 2 is received and the drive instruction P WM I 2 and the regeneration instruction PWMC 2 are output.
- FIG. 3 is a diagram for explaining the control of SOC by the charge / discharge control device of the present embodiment.
- FIG. 4 is a diagram for explaining control of battery power by the charge / discharge control device of the present embodiment.
- curve C V I shows the variation of S OC value at a given temperature (eg +25 ° C)
- curve C V 2 shows the variation of S O C value at high temperature.
- the center of variation of the SOC value is increased as the battery temperature increases.
- the battery power input / output to / from the battery (“battery input / output” in Fig. 4) is the same regardless of the battery temperature.
- FIG. 5 is a general diagram showing the relationship between the SOC value and the open circuit voltage of the battery. Referring to Fig. 5, it can be seen that the open-circuit voltage of the battery increases as the SOC value increases.
- FIG. 6 is a diagram showing fluctuations in battery voltage when battery SOC and input / output power fluctuate as shown in FIG. 3 and FIG.
- curve C V 3 shows the battery voltage variation at a given temperature (eg +25 ° C)
- curve C V 4 shows the battery voltage variation at high temperature.
- the higher the SOC value the higher the open circuit voltage of the battery. In other words, when the temperature is high, the center of fluctuation of the S0C value becomes higher, so the battery voltage becomes higher.
- FIG. 7 is a diagram showing the fluctuation of the battery current when the battery voltage fluctuates as shown in FIG.
- curve C V 5 shows the battery current variation at a given temperature (eg, + 25 ° C.)
- curve C V 6 shows the battery current variation at high temperature.
- the power input / output to / from the battery is the same regardless of the battery temperature. Therefore, as the battery temperature increases, the voltage value increases, so the current value decreases.
- the battery generates heat as the battery is charged and discharged. This raises the battery temperature. If the internal resistance of the battery is R and the battery current is I, the battery It can be considered that the heat generation of the telli is almost proportional to RX 1 2 . In the present embodiment, the battery current value is lowered when the battery temperature is high. As a result, heat generation of the battery can be suppressed, and further increase in battery temperature is suppressed. Conventionally, charge / discharge power is limited when the temperature of the battery exceeds a predetermined temperature. However, by performing such a restriction, the operating point of the engine in the vehicle shown in FIG. In such a case, the fuel consumption may be reduced.
- the cooling structure may increase in size in order to cool the battery efficiently.
- the cost increases as the cooling structure increases in size.
- a cooling device such as a cooling fan or a cooling pump having sufficient capacity to cool the battery must be mounted on the vehicle.
- the electric power input / output from the battery is the same even when the battery temperature changes, so the engine operating point can be kept at the most efficient operating point. . Therefore, according to the present embodiment, it is possible to prevent a reduction in fuel consumption.
- the heat generation of the battery is suppressed when the battery temperature is high, it is possible to prevent the battery temperature from rising excessively. Therefore, even if a cooling structure for cooling the battery is necessary, it is possible to prevent the cooling structure from increasing in size.
- the present embodiment it is possible to extract the performance of the battery more effectively. Further, according to the present embodiment, the performance of the vehicle can be pulled out more effectively.
- the battery is preferably a lithium ion battery.
- the reason is that, in a lithium ion battery, an endothermic reaction occurs at the time of charging, so that the temperature rise at the time of charging can be suppressed.
- the battery power determination unit 1 3 3 shown in FIG. 2 is a map stored in the map storage unit 1 3 6 Is appropriately changed according to the temperature TB, and the power value P in / P out is determined based on the changed map.
- the map change by the battery power determination unit 1 3 3 will be described.
- FIG. 8 is a flowchart for explaining the process of determining the power value Pin / Pout by the battery power determination unit 1 3 3 of FIG.
- the process shown in this flowchart is called from the main routine and executed, for example, when a predetermined condition is satisfied (for example, when the vehicle is started).
- step S1 battery power determination unit 1 3 3 reads map MP 0 shown in FIG. 9 from map storage unit 1 3 6.
- FIG. 9 is a diagram showing a map MP 0 stored in the map storage unit 1 3 6.
- map MP 0 is for determining the charging power and discharging power of the battery according to the SOC value.
- the map MP 0 defines three S0 C values, ⁇ and ⁇ .
- the SOC value is a value indicating SOC when battery discharge and battery charge are switched. In other words, when the battery SOC value is larger than the SOC value, the battery is preferentially discharged, and when the battery SOC value is smaller than the SOC value ⁇ , the battery is preferentially charged.
- SOC value] 3 is a value that indicates the SOC when the battery charge power reaches the limit value (first limit value that is the upper limit value of the charge power) when the SOC drops below the SOC value ⁇ . It is. The charging power increases as the SOC value decreases. If the 300 value is 300 value
- the S OC value ⁇ is a value that indicates the SOC when the battery discharge power reaches the limit value (second limit value, which is the upper limit value of the discharge power) when the S OC value rises above the SOC value ⁇ . . The discharge power increases as the SOC value rises, but when the SOC value is more than the SOC value ⁇ , the discharge power is fixed at the second limit value.
- step S 2 battery power determination unit 1 3 3 obtains the correction of temperature ⁇ .
- step S3 the battery power determination unit 1 3 3 Change map MP 0 based on temperature TB.
- step S 4 the battery power determination unit 1 33 acquires the SOC value from the S0C calculation unit 1 32.
- step S5 the battery power determination unit 133 determines the input / output power value of the battery (power value PinZP out) based on the SOC value and the changed map MP0.
- FIG. 10 is a diagram showing a distribution of SOC values when the battery power determination unit 133 in FIG. 2 charges and discharges the battery according to the map MP 0 in FIG.
- the distribution curve shown in FIG. 10 is a curve showing the distribution of the SOC value output from the SOC calculation unit 132 when the battery power determination unit 133 does not change the map MP0.
- the frequency of the state where the SOC value is in the vicinity of the SOC value ⁇ is the highest. As the SOC value changes from the SOC value to the SOC value] 3, the frequency of the SOC value decreases. The same applies when the SOC value changes from the SOC value ⁇ to the SOC value y.
- FIG. 11 is a diagram showing one modification example of the map MP 0 shown in FIG.
- map MP 1 is SO C value relative to map MP 0
- FIG. 12 is a diagram showing the distribution of S OC values when the battery power determination unit 133 in FIG. 2 determines the battery power based on the map MP 1 shown in FIG.
- the solid line distribution curve shows the SOC value distribution when the battery power determination unit 133 in FIG. 2 determines the battery power based on the map MP 1 shown in FIG. 11.
- the broken line distribution curve Is the same as the distribution curve shown in Fig. 10.
- the solid distribution curve shows that the frequency of occurrence of SO.C values smaller than the S O ⁇ value is low. In other words, the S0C value of the battery is kept high.
- the solid distribution curve indicates that the battery power determination unit 133 determines the battery power according to the map MP 1 to suppress the charging of the battery.
- the fact that the battery's S0C value is kept high indicates that the battery is discharged preferentially. Therefore, when the SOC value of the battery is kept high, charging of the battery is suppressed. Some batteries generate more heat when charging than when discharging. That is, battery power according to map MP 1
- the determining unit 1 33 determines the battery power, not only can the battery heat generation be suppressed by keeping the SOC value high and reducing the current flowing through the battery, but also the battery By reducing the charging frequency, the heat generation of the battery can be suppressed.
- FIG. 13 is a diagram showing another modification of map MP 0 shown in FIG.
- map MP 2 is different from map MP 0 in that the S.OC value a moves to the high S OC value side.
- FIG. 14 is a diagram showing the distribution of S OC values when the battery power determination unit 1 33 of FIG. 2 determines the battery power based on the map MP 2 shown in FIG.
- the actual spring distribution curve is based on the map MP 2 shown in Fig. 13.
- the battery power determining unit 133 can switch the charging and discharging of the battery according to the map MP 2 so that the battery can be charged and discharged while maintaining the SOC value at a high level. As a result, the battery voltage can be reduced because the battery voltage is maintained at a high level. Therefore, heat generation of the battery is suppressed.
- FIG. 15 is a diagram showing still another modification of map MP 0 shown in FIG.
- map MP 3 is different from map MP 0 in that the SOC value y moves to the high S OC value side.
- FIG. 16 is a diagram showing the distribution of S OC values when the battery power determination unit 1 33 of FIG. 2 determines the battery power based on the map MP 3 shown in FIG.
- the solid distribution curve shows the distribution of the SOC value when the battery power determination unit 1 33 of FIG. 2 determines the battery power based on the map MP 3 shown in FIG.
- This distribution curve is similar to the distribution curve shown in FIG.
- the solid distribution curve indicates that the frequency of high SOC values decreases. That is, when the battery power determination unit 133 determines the battery power according to the map MP3, the SOC value is kept high and the power value Pout shown in FIG. 2 is also suppressed. As a result, The current output from the battery when the battery is discharged can be suppressed. Therefore, the SOC value can be maintained at a high level and the battery current can be suppressed, so that the heat generation of the battery can be suppressed.
- the discharge power is set so as not to affect the behavior of the vehicle 100 shown in FIG.
- FIG. 17 is a diagram showing still another modification of the map MP 0 shown in FIG.
- map MP 4 is different from map MP 0 in that the SOC value, SOC value j3, and SOC value ⁇ are uniformly moved to the high SOC value side.
- FIG. 18 is a diagram showing the distribution of S OC values when the battery power determination unit 133 of FIG. 2 determines the battery power based on the map MP 4 shown in FIG.
- the solid distribution curve shows the SOC value distribution when the battery power determination unit 133 in FIG. 2 determines the battery power based on the map MP 4 shown in FIG.
- the distribution curve is the same as the distribution curve shown in FIG.
- the solid distribution curve moves to the higher SOC value side than the dashed distribution curve.
- the battery power determination unit 133 determines any two of the SOC value a ;, the S0C value j3, and the SOC value ⁇ in the map MP 0 in FIG. It may be moved to higher socm as the temperature increases.
- the charge / discharge control device for the secondary battery includes a temperature sensor 42 that detects the temperature TB of the battery B, an SOC calculation unit 132 that detects the charge state of the battery B, and the temperature sensor 42
- a battery power determination unit 133 that sets battery power to be charged and discharged by the battery B based on the temperature TB and the state of charge detected by the SOC calculation unit 132; Battery power determination unit 133 sets the battery power so that the higher the temperature TB, the higher the state of charge.
- the battery power determining unit 133 has a low SOC value that indicates the state of charge when battery B discharge and battery B charge are switched, and 30 If the battery power charged to battery B reaches the limit ⁇ S, the SOC value indicating the state of charge when the battery reaches S, and if the SOC value rises higher than the SOC value, the battery B is discharged. SOC directly indicating the SOC value when the battery power reaches the limit value! Set at least one of / to increase as temperature TB increases. The battery power determination unit 1 33 sets the battery power based on the SOC value, the SOC value 0, the S0C value V, and the state of charge detected by the SOC calculation unit 132.
- Embodiment 1 even if the battery is charged / discharged at a high temperature of the battery, it is possible to suppress the temperature of the battery from further rising.
- the first embodiment it is possible to prevent the engine operating efficiency from being lowered by more effectively extracting the battery performance. Therefore, the performance of the vehicle can be extracted more effectively.
- battery B includes a lithium ion battery. This makes it possible to suppress an increase in battery temperature when battery B is charged.
- the configuration of the vehicle on which the secondary battery charge / discharge control device of the second embodiment is mounted is the same as that of the configuration of vehicle 100 shown in FIG. 1 except that control device 30 is replaced with control device 3 OA. Further, the configuration of control device 30 A is the same as that of control device 30 shown in FIG. 2 except that battery power determination unit 133 is replaced with battery power determination unit 1 33 A.
- Battery power determination unit 1 33 A is similar to battery power determination unit 133 in that map MP 0 shown in FIG. 9 is changed according to temperature TB of battery B. However, the battery power determination unit 133A is based on the distribution of the state of charge detected by the S0C calculation unit 132. Of y, determine the value to be moved to the high SOC value side.
- FIG. 19 is a flowchart for explaining the power value Pin / Pout determination process by battery power determination unit 1 33 A of FIG. Note that the processing shown in this flowchart is performed by the main routine when a predetermined condition is satisfied (for example, when the vehicle is started). Is called and executed.
- Step S 1A between Step S 1 and Step S 2. S 1 B, S 1 C processing is added, (2)
- the processing of step S 4 is not included, and the processing of other steps in the flowchart of Fig. 19 is shown in the figure. This is the same as the process of the corresponding step in the flowchart shown in Fig. 8. Therefore, the process of steps S1A, SIB, and SIC will be mainly described below.
- battery power determination unit 1 33 A acquires the SOC value from SOC calculation unit 132 (step S 1A).
- the battery power determination unit 133A calculates the SOC value distribution based on the past SOC value and the SOC value acquired in step S1A (step S1B).
- the battery power determination unit 133 determines which of the S0C value, SOC value / 3 and SOC value ⁇ in the map MP 0 in FIG. 9 is moved to the higher SOC value side according to the calculated SOC value distribution. Determine (step S 1 C).
- step S 1 C determines which of the S0C value, SOC value / 3 and SOC value ⁇ in the map MP 0 in FIG. 9 is moved to the higher SOC value side according to the calculated SOC value distribution.
- the battery power determination unit 1 33 A stores the distribution curve shown in FIG. 10 in advance, compares this distribution curve with the calculated distribution of the SO C value, and calculates the S 0 C value and the SO C value. Decide which of the SOC values ⁇ to move.
- the map when the S0C value ⁇ is moved is the same as the map MP 2 shown in Fig. 13.
- the map when SOC value j3 is moved is the same as map MP 1 shown in Fig. 11.
- the map when the 300 value ⁇ is moved is the same as the map MP 3 shown in Fig. 15.
- battery power determination unit 133A determines the power value at the time of charge / discharge based on the actual battery charge / discharge operation so that the SOC value is higher than normal when the battery is at a high temperature.
- FIG. 20 is a flowchart illustrating a modification of the determination process of power value Pin / Pout by battery power determination unit 133A of FIG.
- the process shown is called and executed from the main routine when a predetermined condition is satisfied (for example, when the vehicle is started).
- FIGS. 20 and 19 the flowchart shown in FIG. 20 is different from the flowchart shown in FIG. 19 in that steps S11 to S15 are included instead of steps S1C.
- the processing of other steps in the flowchart of FIG. 20 is the same as the processing of the corresponding steps in the flowchart shown in FIG. Therefore, the following mainly describes the processing of steps S 11 to S 15.
- the battery power determination unit 133 ⁇ stores the distribution curve shown in Fig. 10 in advance, and compares this distribution curve with the calculated SOC value distribution to distribute many SOC values near the SOC value. It is determined whether or not.
- the fact that many SOC values are distributed in the vicinity of the SOC value means that the switching between the charging of the battery B and the discharging of the battery B is repeated frequently (a predetermined number of times or more) within a predetermined period.
- step S 1 When many SOC values are distributed near the SOC value (in step S 1 1)
- step S12 the process proceeds to step S12, and if not (NO in step S11), the process proceeds to step S13.
- step S12 battery power determination unit 133A determines to move the SOC value in map MP0 in FIG.
- step S13 the battery power determination unit 133A determines whether or not the charging frequency is higher than the discharging frequency.
- the battery power determination unit 133 ⁇ determines that the charging frequency is higher than the discharging frequency. In this case (YES in step S13), battery power determination unit 1 3
- step S14 decides to move the SOC value to the high SOC value side in the map MP0 in Fig. 9 (step S14).
- the battery power determining unit 133 ⁇ determines that the frequency of discharge is greater than the frequency of charge. It is determined that it is higher. In this case (NO in step S13), the battery power determination unit 1333 A determines to move the SOC value ⁇ to the high SOC value side in the map MP0 of Fig. 9 (step S15).
- step S 2 When the process in any one of steps S 12, S 14, and S 15 is completed, the entire process proceeds to step S 2.
- the battery power determination unit 1 33 A determines to move the SOC value ⁇ in the map MP 0 in FIG. 9 (step S 12 in FIG. 20).
- the vehicle 100 shown in FIG. 1 travels mainly with the output of the engine 4.
- motor generator MG 1 When the SOC value of battery ⁇ ⁇ ⁇ ⁇ is reduced in such a traveling state, motor generator MG 1 generates power by increasing the output of engine 4, and the battery is generated by the power generated by motor generator MG 1. The bag is charged.
- the battery power determination unit 1 3 3 ⁇ determines to move the SOC value
- the frequency of charging battery B can be reduced, the number of operations of motor generator MG 1 can be reduced.
- more engine output can be used for running the vehicle, so the higher the engine output, the faster the vehicle can run. Therefore, for example, the operator can drive the vehicle at a higher speed as the amount of depression of the accelerator pedal is increased. For example, the operability of the vehicle can be improved.
- the battery power determination unit 1 3 3 A sets the SOC value ⁇ in the map MP 0 in FIG. Decide to move (step S in figure 20) 1 5). In this case, for example, it is possible to keep the engine running so that the engine efficiency becomes the best.
- the battery power determination unit 1 33 has a frequency that the SO C value calculated by the 30C calculation unit 132 becomes smaller than the SO C value. ⁇ If the C value is higher than the SOC value, the SOC value is determined as the value to be moved to the high SOC value side. In addition, the battery power determination unit 1 33 ⁇ is 30. If the frequency at which the calculated SOC value is greater than the SOC value a is higher than the frequency at which the calculated SOC value is smaller than the SOC value, then move to the higher SOC value side. The SO C value y ′ is determined as the value to be generated.
- the battery power determining unit 133A determines that the value to be moved to the high SOC value side is switched when the switching between the charging of the battery B and the discharging of the battery B is repeated a predetermined number of times or more within a predetermined period. Determine the C value.
- SOC can be controlled according to the running state of the vehicle.
- the present invention is applied to a series / parallel type hybrid system in which the power of the engine can be divided and transmitted to the axle and the generator by the power split mechanism.
- the present invention is applied to a series type hybrid vehicle in which an engine is used only for driving a generator and an axle driving force is generated only by a motor using electric power generated by the generator, or an electric vehicle that runs only by a motor.
- the embodiment disclosed this time should be considered as illustrative in all points and not restrictive.
- the scope of the present invention is shown not by the above description but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/513,999 US8098050B2 (en) | 2006-11-28 | 2007-11-21 | Charge/discharge control device for secondary battery and vehicle equipped with the same |
CN2007800442293A CN101553967B (zh) | 2006-11-28 | 2007-11-21 | 二次电池的充放电控制装置以及具有其的车辆 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006-320360 | 2006-11-28 | ||
JP2006320360A JP4793237B2 (ja) | 2006-11-28 | 2006-11-28 | 二次電池の充放電制御装置、および、それを備える車両 |
Publications (1)
Publication Number | Publication Date |
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WO2008066092A1 true WO2008066092A1 (en) | 2008-06-05 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/073006 WO2008066092A1 (en) | 2006-11-28 | 2007-11-21 | Secondary battery charge/discharge control device and vehicle using the same |
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US (1) | US8098050B2 (ja) |
JP (1) | JP4793237B2 (ja) |
CN (1) | CN101553967B (ja) |
WO (1) | WO2008066092A1 (ja) |
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Also Published As
Publication number | Publication date |
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JP4793237B2 (ja) | 2011-10-12 |
US20100001692A1 (en) | 2010-01-07 |
CN101553967B (zh) | 2012-06-20 |
JP2008135281A (ja) | 2008-06-12 |
CN101553967A (zh) | 2009-10-07 |
US8098050B2 (en) | 2012-01-17 |
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