EP1937506A1 - Device and method for controlling a battery - Google Patents

Device and method for controlling a battery

Info

Publication number
EP1937506A1
EP1937506A1 EP06820271A EP06820271A EP1937506A1 EP 1937506 A1 EP1937506 A1 EP 1937506A1 EP 06820271 A EP06820271 A EP 06820271A EP 06820271 A EP06820271 A EP 06820271A EP 1937506 A1 EP1937506 A1 EP 1937506A1
Authority
EP
European Patent Office
Prior art keywords
battery
charge
state
vehicle
partial discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06820271A
Other languages
German (de)
French (fr)
Inventor
Masato Origuchi
François ORSINI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP1937506A1 publication Critical patent/EP1937506A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • 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
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/12—Buck converters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • 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
    • 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
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • 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
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/246—Temperature
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/24—Energy storage means
    • B60W2710/242—Energy storage means for electrical energy
    • B60W2710/244—Charge state
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present invention relates to the field of batteries, in particular batteries on board a vehicle.
  • batteries in particular batteries on board a vehicle.
  • Conventional lead-acid batteries are relatively heavy.
  • lithium-ion batteries have emerged whose capacities are interesting but whose life is reduced when their state of charge remains high for too long.
  • the present invention aims at providing a device and a battery management method adapted to a battery whose life is reduced by a high charge state.
  • the present invention aims to remedy the defect mentioned above lithium-ion batteries.
  • the present invention aims to increase the life of lithium-ion batteries, while preserving performance and low power consumption.
  • the management device is for a battery embedded in a vehicle.
  • the device includes a battery charge state detector and a partial battery discharge means in response to a signal from a supervisor to achieve a state of charge that provides a long battery life for the battery. a stop of the vehicle. This prevents storage of the battery at a high load harmful to its life. The life cycle cost of the battery and the generation of waste is reduced.
  • the device comprises a converter for transferring energy from said battery to another battery on board the same vehicle during detection. a state of charge of the battery. It is thus possible to transfer energy to another battery able to withstand a high load over a long period, for example a lead-acid battery whose high state of charge has a positive effect on its lifetime. In this case, there is a double effect favorable to the service life of batteries of two different types.
  • the device comprises a fan for cooling said battery when detecting a state of charge of the battery.
  • the device comprises a control unit connected to the state of charge detector and able to control the partial discharge means according to the state of charge.
  • the state of charge detector may be a voltage sensor.
  • said battery is of Lithium / ion type.
  • said battery is connected to an electric propulsion motor.
  • the method of managing a battery on board a vehicle comprises detecting a state of charge of the battery and, in response to a detected state of charge, partially discharging the battery to reach a state of charge ensuring long life of said battery during a stop of the vehicle.
  • the partial discharge is performed by charging another battery on board the same vehicle.
  • the energy stored in the vehicle is substantially conserved.
  • the other battery may be of the lead-acid type, the life of which is increased by a high state of charge.
  • a vehicle comprising at least two batteries, one of a first type with a long service life under low state of charge and the other of a second type with a long life in a very high state. charge, the battery of the first type is partially discharged and charged partially the battery of the second type. The lifetimes of both types of batteries are thus increased.
  • the partial discharge is performed by cooling said battery by ventilation.
  • the cooling of said battery resulting from the ventilation is favorable to a long service life.
  • a hybrid vehicle may include a heat engine, one or more parallel or series connected electric motors, and energy storage batteries.
  • the battery reduces its degradation due to a high state of charge and the energy taken from the battery can be used for the preservation of the battery or stored elsewhere. This is particularly beneficial during a prolonged stoppage of the vehicle, for example when parking in a car park.
  • FIG 1 is a schematic view of a system according to a first embodiment
  • FIG. 2 is a time diagram during a stopping of a vehicle equipped with the system of FIG. 1.
  • the battery management device comprises a state of charge detector 4. a battery and a means for partially discharging the battery controlled by a supervisor 5, for example in the form of an electrical energy consuming element 3 or a fan motor 8.
  • the device is associated with a battery 2 , for example lithium-ion type, connected to the detector 4 monitoring the state of charge of the battery 2 and outputting a state of charge signal from the battery 2 to the supervisor 5 also part of the device.
  • the battery 2 can be connected to a generator 1, for example comprising an alternator associated with an inverter, the alternator being driven by a heat engine.
  • the battery 2 may also be connected to another battery 7, for example of lead-acid type, via an interface 6, for example a DC-DC converter may include a chopper.
  • the battery 7 may have a nominal voltage of the order of 12 volts and the battery 2 may have a higher nominal voltage, of the order of a few tens to a few hundred volts.
  • the interface 6 is connected to the supervisor 5 to receive energy transfer control commands from the battery 2 to the battery 7 or from the battery 7 to the battery 2.
  • the consumer organs 3 and the motor fan 8 are also connected to the supervisor 5 to receive actuation commands.
  • the motor-fan 8, in operation is powered by the battery 2 and directs on said battery 2 a flow of air, cooling.
  • the battery 2 is also connected to an electric motor unit 9 connected to the battery 7 and the supervisor 5.
  • the electric motor unit 9 may comprise an electric propulsion motor and a control unit of the electric propulsion motor.
  • the electric motor unit 9 is generally powered by the battery 2 to propel the vehicle or assist the propulsion of the vehicle. During braking, the electric motor unit is capable of supplying electric energy recovery to recharge the battery 2.
  • the electric motor unit 9 and the supervisor 5 are connected by a data exchange line, so that the supervisor 5 receives information from the electric motor unit 9 and to optimize the management of the battery 2 and that the electric motor unit 9 receives information from from the supervisor 5 enabling said electric motor unit 9 to optimize its management.
  • the generator 1 and the electric motor unit 9 may be constituted by a single system.
  • the charge state detector 4 may comprise a voltage sensor transmitting to the supervisor 5 a signal representative of the voltage at the terminals of the battery 2.
  • the charge state detector 4 may also comprise a temperature sensor and a detector probe. current.
  • the supervisor 5 manages the energy stored in the battery 2 according to various data, as disclosed in US 2005/0088139. A stopping of the vehicle is generally preceded by a slowdown during which the electric motor unit 9 is capable of recovering energy and charging the battery 2.
  • the battery 2 therefore has a high probability of being in a high state of charge.
  • some types of batteries including lithium-ion batteries, have a degradation over time, the higher their state of charge is high. If the stopping of the vehicle is of short duration, for example at a red light or a stop sign, the energy necessary for the restarting and acceleration of the vehicle will be taken a few tens of seconds after stopping, then causing a drop in the level of charge of the battery 2. In such a case, the battery 2 will not undergo significant degradation.
  • the supervisor 5 when a state of prolonged stopping of the vehicle is detected, for example after cutting contact and door lock, controls a partial discharge of said battery 2.
  • the partial discharge can be carried out in several ways.
  • the supervisor 5 can control the operation of the motor-fan 8, allowing the cooling of the battery 2. This is particularly interesting in the case where the temperature of the battery 2 is high, which is also detrimental to its life. life.
  • the supervisor 5 can control this mode of partial discharge of the battery 2 by operating the motor-fan 8 on detection of a high temperature of the battery 2 by the detector 4 or by detection of a high outside temperature.
  • the supervisor 5 can also control the interface 6 between the battery 2 and the battery 7, so that the interface 6 draws energy from the battery 2 and supplies the battery 7.
  • the energy stored in the battery Battery 2 is then substantially conserved and stored in the battery 7, which is economical in energy.
  • the increase in the state of charge of the battery 7 is favorable to its longevity, and this when the initial state of charge of the battery 7 is weak.
  • the supervisor 5 can also control the activation of the energy-consuming member 3 present on the vehicle, for example a motor-cooling fan of the radiator, a water pump in a heat engine, heated windows in the event of outside temperature. low and a planned short - term shutdown, an air - conditioning unit in case of high outside temperature and short - term shutdown, etc.
  • the supervisor 5 determines whether the partial discharge of the battery 2 is desirable as a function of received information relating to the state of charge of the battery 2 and data relating to the stopping of the vehicle.
  • the vehicle stopping data may include the state of charge or the voltage of the vehicle.
  • battery 7 (given by the interface 10 which can be for example a charge state gauge or a voltage sensor), a door lock state, a state of operation of accessories, the position of the vehicle for example provided by GPS, etc. Then, the supervisor 5 determines an optimal way to use the electrical energy taken from the battery 2 to power energy consuming organs, cool the battery 2 or recharge another battery.
  • the diagram of FIG. 2 comprises a first curve showing the state of charge of the battery 2, a second curve showing the state of charge of the battery 7 and a third curve showing the temperature of the battery 2.
  • first phase of driving the vehicle the state of charge of the battery 2 varies around an average which can be set for example at 60% of the maximum state of charge.
  • the state of charge of the battery 7 is such that its voltage remains around 13 volts, which can be regulated by the converter 6.
  • the temperature of the battery 2 increases progressively as it is used in the course of which follow phases of charge and discharge.
  • the supervisor 5 controls the partial discharge of the battery 2 and the partial charge of the battery 7.
  • 200 Wh can be taken from the battery 2 and sent by the battery.
  • the battery 2 can thus be maintained during a parking period at a state of charge of the order 50% or less than 50% of its maximum state of charge, which significantly increases its service life.
  • the battery 2 is recharged by the power supply 1 and / or the electric motor unit 9 and sees again its state of charge vary as in the first phase of driving.
  • the battery 7 sees its voltage gradually back down to its regulated voltage, for example of the order of 13 volts, and this because of the consumption of electrical energy of the consumer organs powered by said battery 7, for example headlights, windows electric or the passenger compartment fans of the vehicle.
  • the temperature of the battery 2 increases again gradually according to the charging and discharging cycles that said battery 2 undergoes.
  • the average state of charge of a battery is significantly reduced by reducing the state of charge when the vehicle is stopped.
  • the energy taken from the battery when the vehicle is stopped can be stored by other means, such as another battery of different type, used for the benefit of said battery, for example to cause a cooling also favorable to its longevity. , or to feed other energy consuming bodies on board the vehicle.

Abstract

The invention concerns a device for controlling a battery (2) integrated in a vehicle, comprising a sensor (4) of the state of charge of the battery (2) and means for partly discharging the battery (2) responsive to a signal from the state of the charge sensor (4) to reach a state of charge ensuring long life cycle of said battery (2) when the vehicle is stopped.

Description

Dispositif et procédé de gestion d'une batterie Device and method for managing a battery
La présente invention concerne le domaine des batteries, en particulier des batteries embarquées à bord d'un véhicule. L' augmentation du nombre et de la puissance des organes consommateurs d' énergie électrique, par exemple pour la propulsion dans un véhicule hybride, rend souhaitable une augmentation de l' énergie stockable dans les batteries du véhicule. Les batteries conventionnelles plomb-acide sont relativement lourdes . Plus récemment sont apparues les batteries lithium-ion dont les capacités sont intéressantes mais dont la durée de vie est réduite lorsque leur état de charge reste élevé trop longtemps .The present invention relates to the field of batteries, in particular batteries on board a vehicle. The increase in the number and the power of the electric power consuming members, for example for propulsion in a hybrid vehicle, makes it desirable to increase the energy that can be stored in the batteries of the vehicle. Conventional lead-acid batteries are relatively heavy. More recently, lithium-ion batteries have emerged whose capacities are interesting but whose life is reduced when their state of charge remains high for too long.
La présente invention vise à proposer un dispositif et un procédé de gestion de batterie adapté à une batterie dont la durée de vie est diminuée par un état de charge élevé.The present invention aims at providing a device and a battery management method adapted to a battery whose life is reduced by a high charge state.
La présente invention vise à remédier au défaut évoqué ci- dessus des batteries lithium-ion.The present invention aims to remedy the defect mentioned above lithium-ion batteries.
La présente invention vise à augmenter la durée de vie des batteries lithium-ion, tout en préservant les performances et une faible consommation d' énergie.The present invention aims to increase the life of lithium-ion batteries, while preserving performance and low power consumption.
Le dispositif de gestion est destiné à une batterie embarquée dans un véhicule. Le dispositif comprend un détecteur d' état de charge de la batterie et un moyen de décharge partielle de la batterie en réponse à un signal provenant d'un superviseur pour atteindre un état de charge assurant une durée de vie longue de ladite batterie lors d'un arrêt du véhicule. On évite ainsi un stockage de la batterie à une charge élevée nuisible à sa durée de vie. Le coût de cycle de vie de la batterie et la production de déchets est réduit.The management device is for a battery embedded in a vehicle. The device includes a battery charge state detector and a partial battery discharge means in response to a signal from a supervisor to achieve a state of charge that provides a long battery life for the battery. a stop of the vehicle. This prevents storage of the battery at a high load harmful to its life. The life cycle cost of the battery and the generation of waste is reduced.
Dans un mode de réalisation, le dispositif comprend un convertisseur pour transférer de l'énergie de ladite batterie vers une autre batterie embarquée à bord du même véhicule lors de la détection d'un état de charge de la batterie. On peut ainsi transférer de l' énergie vers une autre batterie capable de supporter une charge élevée sur une longue période, par exemple une batterie plomb-acide dont l' état de charge élevé a un effet positif sur sa durée de vie. Dans ce cas, on bénéficie d'un double effet favorable à la durée de vie de batteries de deux types différents .In one embodiment, the device comprises a converter for transferring energy from said battery to another battery on board the same vehicle during detection. a state of charge of the battery. It is thus possible to transfer energy to another battery able to withstand a high load over a long period, for example a lead-acid battery whose high state of charge has a positive effect on its lifetime. In this case, there is a double effect favorable to the service life of batteries of two different types.
Dans un mode de réalisation, le dispositif comprend un ventilateur pour refroidir ladite batterie lors de la détection d'un état de charge de la batterie. Dans un mode de réalisation, le dispositif comprend une unité de commande reliée au détecteur d' état de charge et apte à commander le moyen de décharge partielle en fonction de l' état de charge. Le détecteur d' état de charge peut être un capteur de tension.In one embodiment, the device comprises a fan for cooling said battery when detecting a state of charge of the battery. In one embodiment, the device comprises a control unit connected to the state of charge detector and able to control the partial discharge means according to the state of charge. The state of charge detector may be a voltage sensor.
Dans un mode de réalisation, ladite batterie est de type Lithium/ion.In one embodiment, said battery is of Lithium / ion type.
Dans un mode de réalisation, ladite batterie est relié à un moteur électrique de propulsion.In one embodiment, said battery is connected to an electric propulsion motor.
Le procédé de gestion d'une batterie embarquée dans un véhicule, comprend la détection d'un état de charge de la batterie et, en réponse à un état de charge détecté, la décharge partielle de la batterie pour atteindre un état de charge assurant une durée de vie longue de ladite batterie lors d'un arrêt du véhicule.The method of managing a battery on board a vehicle comprises detecting a state of charge of the battery and, in response to a detected state of charge, partially discharging the battery to reach a state of charge ensuring long life of said battery during a stop of the vehicle.
Dans un mode de réalisation, la décharge partielle est effectuée en chargeant une autre batterie embarquée à bord du même véhicule. L' énergie stockée à bord du véhicule est sensiblement conservée.In one embodiment, the partial discharge is performed by charging another battery on board the same vehicle. The energy stored in the vehicle is substantially conserved.
L' autre batterie peut être de type plomb-acide, dont la durée de vie est accrue par un état de charge élevé. En d' autres termes, dans un véhicule comprenant au moins deux batteries, l'une d'un premier type à longue durée de vie sous faible état de charge et l' autre d'un deuxième type à longue durée de vie sous fort état de charge, on décharge partiellement la batterie du premier type et on charge partiellement la batterie du deuxième type. Les durées de vie des deux types de batteries sont ainsi accrues .The other battery may be of the lead-acid type, the life of which is increased by a high state of charge. In other words, in a vehicle comprising at least two batteries, one of a first type with a long service life under low state of charge and the other of a second type with a long life in a very high state. charge, the battery of the first type is partially discharged and charged partially the battery of the second type. The lifetimes of both types of batteries are thus increased.
Dans un mode de réalisation, la décharge partielle est effectuée en refroidissant ladite batterie par ventilation. Le refroidissement de ladite batterie résultant de la ventilation est favorable à une durée de vie longue.In one embodiment, the partial discharge is performed by cooling said battery by ventilation. The cooling of said battery resulting from the ventilation is favorable to a long service life.
L'invention peut s ' appliquer aux véhicules à propulsion électrique ou hybride permettant de réduire les rejets gazeux dans l' atmosphère. Un véhicule hybride peut comprendre un moteur thermique, un ou plusieurs moteurs électriques montés en parallèle ou en série et des batteries de stockage d' énergie.The invention can be applied to vehicles with electric or hybrid propulsion for reducing gaseous emissions into the atmosphere. A hybrid vehicle may include a heat engine, one or more parallel or series connected electric motors, and energy storage batteries.
Grâce à l' invention, la batterie voit réduire sa dégradation due à un état de charge élevé et l' énergie prélevée sur la batterie peut être utilisée pour la préservation de la batterie ou stockée ailleurs. Ceci est particulièrement bénéfique lors d'un arrêt prolongé du véhicule, par exemple lors d'un stationnement dans un parking.Thanks to the invention, the battery reduces its degradation due to a high state of charge and the energy taken from the battery can be used for the preservation of the battery or stored elsewhere. This is particularly beneficial during a prolonged stoppage of the vehicle, for example when parking in a car park.
La présente invention sera mieux comprise à l'étude de la description détaillée de quelques modes de réalisation pris à titre d' exemples nullement limitatifs et illustrés par les dessins annexés, sur lesquels :The present invention will be better understood on studying the detailed description of some embodiments taken as non-limiting examples and illustrated by the appended drawings, in which:
-la figure 1 est une vue schématique d'un système selon un premier mode de réalisation; etFIG 1 is a schematic view of a system according to a first embodiment; and
-la figure 2 est un diagramme temporel lors d'un arrêt d'un véhicule équipé du système de la figure 1. Tel qu' illustré sur la figure 1 , le dispositif de gestion de batterie comprend un détecteur 4 d'état de charge d'une batterie et un moyen de décharge partielle de la batterie commandé par un superviseur 5, par exemple sous la forme d'un élément consommateur d' énergie électrique 3 ou d'un moto-ventilateur 8. Le dispositif est associé à une batterie 2, par exemple de type lithium-ion, reliée au détecteur 4 assurant la surveillance de l' état de charge de la batterie 2 et envoyant en sortie un signal d'état de charge de la batterie 2 au superviseur 5 faisant également partie du dispositif.FIG. 2 is a time diagram during a stopping of a vehicle equipped with the system of FIG. 1. As illustrated in FIG. 1, the battery management device comprises a state of charge detector 4. a battery and a means for partially discharging the battery controlled by a supervisor 5, for example in the form of an electrical energy consuming element 3 or a fan motor 8. The device is associated with a battery 2 , for example lithium-ion type, connected to the detector 4 monitoring the state of charge of the battery 2 and outputting a state of charge signal from the battery 2 to the supervisor 5 also part of the device.
Dans le mode de réalisation représenté, la batterie 2 peut être reliée à un générateur 1 , par exemple comprenant un alternateur associé à un onduleur, l' alternateur étant entraîné par un moteur thermique. La batterie 2 peut également être reliée à une autre batterie 7, par exemple de type plomb-acide, par l' intermédiaire d'une interface 6, par exemple un convertisseur continu-continu pouvant comprendre un hacheur. La batterie 7 peut présenter une tension nominale de l' ordre de 12 volts et la batterie 2 peut présenter une tension nominale plus élevée, de l' ordre de quelques dizaines à quelques centaines de volts . L'interface 6 est reliée au superviseur 5 pour recevoir des ordres de commande de transfert d' énergie de la batterie 2 vers la batterie 7 ou de la batterie 7 vers la batterie 2. Les organes consommateurs 3 et le moto-ventilateur 8 sont également reliés au superviseur 5 pour recevoir des ordres d' actionnement. Le moto-ventilateur 8, en fonctionnement, est alimenté par la batterie 2 et dirige sur ladite batterie 2 un flux d' air, de refroidissement.In the embodiment shown, the battery 2 can be connected to a generator 1, for example comprising an alternator associated with an inverter, the alternator being driven by a heat engine. The battery 2 may also be connected to another battery 7, for example of lead-acid type, via an interface 6, for example a DC-DC converter may include a chopper. The battery 7 may have a nominal voltage of the order of 12 volts and the battery 2 may have a higher nominal voltage, of the order of a few tens to a few hundred volts. The interface 6 is connected to the supervisor 5 to receive energy transfer control commands from the battery 2 to the battery 7 or from the battery 7 to the battery 2. The consumer organs 3 and the motor fan 8 are also connected to the supervisor 5 to receive actuation commands. The motor-fan 8, in operation, is powered by the battery 2 and directs on said battery 2 a flow of air, cooling.
La batterie 2 est également reliée à un bloc moteur électrique 9 relié à la batterie 7 et au superviseur 5. Le bloc moteur électrique 9 peut comprendre un moteur électrique de propulsion et une unité de pilotage du moteur électrique de propulsion. Le bloc moteur électrique 9 est généralement alimenté par la batterie 2 pour propulser le véhicule ou assister la propulsion du véhicule. Lors d'un freinage, le bloc moteur électrique est capable de fournir une énergie électrique de récupération pour recharger la batterie 2. Le bloc moteur électrique 9 et le superviseur 5 sont reliés par une ligne d' échange de données, de telle sorte que le superviseur 5 reçoit des informations en provenance du bloc moteur électrique 9 et permettant d' optimiser la gestion de la batterie 2 et que le bloc moteur électrique 9 reçoit des informations en provenance du superviseur 5 permettant audit bloc moteur électrique 9 d' optimiser sa gestion.The battery 2 is also connected to an electric motor unit 9 connected to the battery 7 and the supervisor 5. The electric motor unit 9 may comprise an electric propulsion motor and a control unit of the electric propulsion motor. The electric motor unit 9 is generally powered by the battery 2 to propel the vehicle or assist the propulsion of the vehicle. During braking, the electric motor unit is capable of supplying electric energy recovery to recharge the battery 2. The electric motor unit 9 and the supervisor 5 are connected by a data exchange line, so that the supervisor 5 receives information from the electric motor unit 9 and to optimize the management of the battery 2 and that the electric motor unit 9 receives information from from the supervisor 5 enabling said electric motor unit 9 to optimize its management.
Dans certains modes de réalisation, le générateur 1 et le bloc moteur électrique 9 pourront être constitués par un seul système. Le détecteur d' état de charge 4 peut comprendre un capteur de tension transmettant au superviseur 5 un signal représentatif de la tension aux bornes de la batterie 2. Le détecteur d' état de charge 4 peut également comprendre un capteur de température et une sonde de courant. Lors d'un déplacement du véhicule à bord duquel est embarqué le dispositif, le superviseur 5 gère l' énergie stockée dans la batterie 2 en fonction de différentes données, telles qu' exposées dans le document US 2005/0088139. Un arrêt du véhicule est en général précédé d'un ralentissement au cours duquel le bloc moteur électrique 9 est susceptible de récupérer de l' énergie et de charger la batterie 2.In some embodiments, the generator 1 and the electric motor unit 9 may be constituted by a single system. The charge state detector 4 may comprise a voltage sensor transmitting to the supervisor 5 a signal representative of the voltage at the terminals of the battery 2. The charge state detector 4 may also comprise a temperature sensor and a detector probe. current. During a movement of the vehicle on which the device is embedded, the supervisor 5 manages the energy stored in the battery 2 according to various data, as disclosed in US 2005/0088139. A stopping of the vehicle is generally preceded by a slowdown during which the electric motor unit 9 is capable of recovering energy and charging the battery 2.
A l' immobilisation complète du véhicule, la batterie 2 présente donc une probabilité importante de se trouver dans un état de charge élevé. Or, certains types de batteries, notamment les batteries lithium-ion, présentent une dégradation au cours du temps d' autant plus forte que leur état de charge est élevé. Si l' arrêt du véhicule est de courte durée, par exemple à un feu rouge ou à un panneau stop, l' énergie nécessaire à la remise en mouvement et à l' accélération du véhicule sera prélevée quelques dizaines de secondes après l' arrêt, provoquant alors une baisse du niveau de charge de la batterie 2. Dans un tel cas, la batterie 2 ne subira pas de dégradation importante. Au contraire, lors d'un arrêt du véhicule pour une durée plus longue, par exemple dans une place de stationnement, la batterie 2 risque de rester pendant une longue période, de plusieurs heures ou de plusieurs jours, à un niveau de charge élevé, d' où une dégradation sensible de ladite batterie 2. Pour éviter une telle dégradation, le superviseur 5, lorsqu'un état d' arrêt prolongé du véhicule est détecté, par exemple après coupure du contact et verrouillage des portières, commande une décharge partielle de ladite batterie 2.At complete immobilization of the vehicle, the battery 2 therefore has a high probability of being in a high state of charge. However, some types of batteries, including lithium-ion batteries, have a degradation over time, the higher their state of charge is high. If the stopping of the vehicle is of short duration, for example at a red light or a stop sign, the energy necessary for the restarting and acceleration of the vehicle will be taken a few tens of seconds after stopping, then causing a drop in the level of charge of the battery 2. In such a case, the battery 2 will not undergo significant degradation. On the contrary, when stopping the vehicle for a longer period, for example in a parking space, the battery 2 may remain for a long time, several hours or several days, at a high load level, hence a significant degradation of said battery 2. To avoid such degradation, the supervisor 5, when a state of prolonged stopping of the vehicle is detected, for example after cutting contact and door lock, controls a partial discharge of said battery 2.
La décharge partielle peut être effectuée de plusieurs manières. Le superviseur 5 peut commander l' actionnement du moto-ventilateur 8, permettant le refroidissement de la batterie 2. Ceci s ' avère particulièrement intéressant dans le cas où la température de la batterie 2 est élevée, ce qui est également néfaste à sa durée de vie. Le superviseur 5 peut commander ce mode de décharge partielle de la batterie 2 par actionnement du moto-ventilateur 8 sur détection d'une température élevée de la batterie 2 par le détecteur 4 ou encore par détection d'une température extérieure élevée.The partial discharge can be carried out in several ways. The supervisor 5 can control the operation of the motor-fan 8, allowing the cooling of the battery 2. This is particularly interesting in the case where the temperature of the battery 2 is high, which is also detrimental to its life. life. The supervisor 5 can control this mode of partial discharge of the battery 2 by operating the motor-fan 8 on detection of a high temperature of the battery 2 by the detector 4 or by detection of a high outside temperature.
Le superviseur 5 peut également commander l'interface 6 entre la batterie 2 et la batterie 7, de telle sorte que l'interface 6 prélève de l' énergie sur la batterie 2 et en fournisse à la batterie 7. L' énergie stockée dans la batterie 2 est alors sensiblement conservée et stockée dans la batterie 7, ce qui s ' avère économique en énergie. En outre, dans le cas où la batterie 7 est une batterie de type plomb-acide, l' augmentation de l' état de charge de la batterie 7 est favorable à sa longévité, et ce lorsque l' état de charge initial de la batterie 7 est faible. Le superviseur 5 peut également commander l' actionnement d' organe consommateur d' énergie 3 présent sur le véhicule, par exemple un moto-ventilateur de refroidissement du radiateur, une pompe à eau dans un moteur thermique, des vitres chauffantes en cas de température extérieure basse et d'un arrêt prévu de courte durée, un groupe de climatisation en cas de température extérieure élevée et d' arrêt prévu de courte durée, etc .The supervisor 5 can also control the interface 6 between the battery 2 and the battery 7, so that the interface 6 draws energy from the battery 2 and supplies the battery 7. The energy stored in the battery Battery 2 is then substantially conserved and stored in the battery 7, which is economical in energy. In addition, in the case where the battery 7 is a lead-acid type battery, the increase in the state of charge of the battery 7 is favorable to its longevity, and this when the initial state of charge of the battery 7 is weak. The supervisor 5 can also control the activation of the energy-consuming member 3 present on the vehicle, for example a motor-cooling fan of the radiator, a water pump in a heat engine, heated windows in the event of outside temperature. low and a planned short - term shutdown, an air - conditioning unit in case of high outside temperature and short - term shutdown, etc.
En d' autres termes, le superviseur 5 détermine si la décharge partielle de la batterie 2 est souhaitable en fonction d' informations reçues relatives à l' état de charge de la batterie 2 et des données relatives à l' arrêt du véhicule. Les données relatives à l' arrêt du véhicule peuvent comprendre l' état de charge ou la tension de la batterie 7 (donné par l' interface 10 qui peut être par exemple une jauge d' état de charge ou un capteur de tension), un état de verrouillage des portières, un état de fonctionnement d' accessoires, la position du véhicule par exemple fournie par GPS, etc. Ensuite, le superviseur 5 détermine une façon optimale d'utiliser l' énergie électrique prélevée sur la batterie 2 pour alimenter des organes consommateurs d' énergie, refroidir la batterie 2 ou encore recharger une autre batterie.In other words, the supervisor 5 determines whether the partial discharge of the battery 2 is desirable as a function of received information relating to the state of charge of the battery 2 and data relating to the stopping of the vehicle. The vehicle stopping data may include the state of charge or the voltage of the vehicle. battery 7 (given by the interface 10 which can be for example a charge state gauge or a voltage sensor), a door lock state, a state of operation of accessories, the position of the vehicle for example provided by GPS, etc. Then, the supervisor 5 determines an optimal way to use the electrical energy taken from the battery 2 to power energy consuming organs, cool the battery 2 or recharge another battery.
Le diagramme de la figure 2 comprend une première courbe montrant l' état de charge de la batterie 2, une deuxième courbe montrant l' état de charge de la batterie 7 et une troisième courbe montrant la température de la batterie 2. Lors d'une première phase de roulage du véhicule, l' état de charge de la batterie 2 varie autour d'une moyenne qui peut être fixée par exemple à 60% de l' état de charge maximal. L' état de charge de la batterie 7 est tel que sa tension reste aux alentours de 13 volts en pouvant être régulée par le convertisseur 6. La température de la batterie 2 augmente progressivement au fur et à mesure de son utilisation au cours de laquelle se succèdent des phases de charge et de décharge. Lors d'un arrêt en stationnement du véhicule, le superviseur 5 commande alors la décharge partielle de la batterie 2 et la charge partielle de la batterie 7. A titre d' exemple, 200 Wh peuvent être prélevés sur la batterie 2 et envoyés par l' intermédiaire de l' interface 6 à la batterie 7 dont la tension augmente, par exemple jusqu' à 14,5 volts . Alternativement, le moto-ventilateur 8 est mis en fonctionnement, ce qui provoque une baisse rapide de la température de la batterie 2. La batterie 2 peut ainsi être maintenue au cours d'une période de stationnement à un état de charge de l' ordre de 50% ou inférieur à 50% de son état de charge maximal, ce qui accroît significativement sa durée de vie. Lors d'une remise en route du véhicule, la batterie 2 est rechargée par l' alimentation 1 et/ou le bloc moteur électrique 9 et voit à nouveau son état de charge varier comme dans la première phase de roulage. La batterie 7 voit sa tension progressivement redescendre à sa tension régulée, par exemple de l' ordre de 13 volts, et ce en raison de la consommation d' énergie électrique des organes consommateurs alimentés par ladite batterie 7, par exemple les phares, les vitres électriques ou encore les ventilateurs d'habitacle du véhicule. La température de la batterie 2 augmente à nouveau progressivement en fonction des cycles de charge et décharge que ladite batterie 2 subit.The diagram of FIG. 2 comprises a first curve showing the state of charge of the battery 2, a second curve showing the state of charge of the battery 7 and a third curve showing the temperature of the battery 2. first phase of driving the vehicle, the state of charge of the battery 2 varies around an average which can be set for example at 60% of the maximum state of charge. The state of charge of the battery 7 is such that its voltage remains around 13 volts, which can be regulated by the converter 6. The temperature of the battery 2 increases progressively as it is used in the course of which follow phases of charge and discharge. During a parked stop of the vehicle, the supervisor 5 then controls the partial discharge of the battery 2 and the partial charge of the battery 7. By way of example, 200 Wh can be taken from the battery 2 and sent by the battery. intermediate of the interface 6 to the battery 7 whose voltage increases, for example up to 14.5 volts. Alternatively, the motor-fan 8 is put into operation, which causes a rapid drop in the temperature of the battery 2. The battery 2 can thus be maintained during a parking period at a state of charge of the order 50% or less than 50% of its maximum state of charge, which significantly increases its service life. When restarting the vehicle, the battery 2 is recharged by the power supply 1 and / or the electric motor unit 9 and sees again its state of charge vary as in the first phase of driving. The battery 7 sees its voltage gradually back down to its regulated voltage, for example of the order of 13 volts, and this because of the consumption of electrical energy of the consumer organs powered by said battery 7, for example headlights, windows electric or the passenger compartment fans of the vehicle. The temperature of the battery 2 increases again gradually according to the charging and discharging cycles that said battery 2 undergoes.
Grâce à l' invention, l' état de charge moyen d'une batterie, telle qu'une batterie lithium-ion, est nettement réduit par diminution de l' état de charge à l' arrêt du véhicule. L' énergie prélevée sur la batterie à l' arrêt du véhicule peut être stockée par d' autres moyens, telle qu'une autre batterie de type différent, utilisée au profit de ladite batterie, par exemple pour provoquer un refroidissement également favorable à sa longévité, ou encore pour alimenter d' autres organes consommateurs d' énergie embarqués à bord du véhicule. Thanks to the invention, the average state of charge of a battery, such as a lithium-ion battery, is significantly reduced by reducing the state of charge when the vehicle is stopped. The energy taken from the battery when the vehicle is stopped can be stored by other means, such as another battery of different type, used for the benefit of said battery, for example to cause a cooling also favorable to its longevity. , or to feed other energy consuming bodies on board the vehicle.

Claims

REVENDICATIONS
1 -Dispositif de gestion d'une batterie (2) embarquée dans un véhicule, caractérisé par le fait qu'il comprend un détecteur (4) d' état de charge de la batterie et un moyen de décharge partielle de la batterie en réponse à un signal provenant du détecteur d' état de charge pour atteindre un état de charge assurant une durée de vie longue de ladite batterie lors d'un arrêt du véhicule.1 -Dispositif management of a battery (2) embedded in a vehicle, characterized in that it comprises a detector (4) of state of charge of the battery and a means of partial discharge of the battery in response to a signal from the state of charge detector to achieve a state of charge ensuring a long life of said battery when stopping the vehicle.
2-Dispositif selon la revendication 1 , comprenant un convertisseur (6) pour transférer de l' énergie de ladite batterie vers une autre batterie (7) embarquée à bord du même véhicule lors de la détection d'un état de charge de la batterie.2-Device according to claim 1, comprising a converter (6) for transferring energy from said battery to another battery (7) on board the same vehicle when detecting a state of charge of the battery.
3-Dispositif selon l'une quelconque des revendications précédentes, comprenant un ventilateur (8) pour refroidir ladite batterie (2) lors de la détection d'un état de charge de la batterie à l' arrêt.3-Device according to any one of the preceding claims, comprising a fan (8) for cooling said battery (2) when detecting a state of charge of the battery at a standstill.
4-Dispositif selon l'une quelconque des revendications précédentes, comprenant une unité de commande (5) reliée au détecteur d'état de charge et apte à commander le moyen de décharge partielle en fonction de l' état de charge. 5-Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite batterie (2) est de type Lithium-ion.4-Device according to any one of the preceding claims, comprising a control unit (5) connected to the state of charge detector and adapted to control the partial discharge means according to the state of charge. 5-Device according to any one of the preceding claims, wherein said battery (2) is of the lithium-ion type.
6-Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite batterie (2) est reliée à un moteur électrique de propulsion. 7-Procédé de gestion d'une batterie (2) embarquée dans un véhicule, dans lequel on détecte un état de charge de la batterie (2) et, en réponse à un état de charge détecté, on décharge partiellement la batterie (2) pour atteindre un état de charge assurant une durée de vie longue de ladite batterie (2) lors d'un arrêt du véhicule. 8-Procédé selon la revendication 7 , dans lequel la décharge partielle est effectuée en chargeant une autre batterie (7) embarquée à bord du même véhicule.6-Device according to any one of the preceding claims, wherein said battery (2) is connected to an electric propulsion motor. 7-A method for managing a battery (2) on board a vehicle, in which a state of charge of the battery (2) is detected and, in response to a detected state of charge, the battery (2) is partially discharged to achieve a state of charge ensuring a long life of said battery (2) during a stop of the vehicle. 8. The method of claim 7, wherein the partial discharge is performed by charging another battery (7) on board the same vehicle.
9-Procédé selon la revendication 7 , dans lequel la décharge partielle est effectuée en refroidissant ladite batterie (2) par ventilation. 9-Process according to claim 7, wherein the partial discharge is performed by cooling said battery (2) by ventilation.
EP06820271A 2005-10-10 2006-10-10 Device and method for controlling a battery Withdrawn EP1937506A1 (en)

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FR0510321A FR2891774B1 (en) 2005-10-10 2005-10-10 DEVICE AND METHOD FOR MANAGING A BATTERY
PCT/FR2006/051009 WO2007042724A1 (en) 2005-10-10 2006-10-10 Device and method for controlling a battery

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FR2940864B1 (en) * 2009-01-06 2011-01-28 Peugeot Citroen Automobiles Sa DEVICE FOR MANAGING THE CHARGE OF A BATTERY ON BOARD A VEHICLE
FR2942086B1 (en) * 2009-02-12 2011-02-18 Peugeot Citroen Automobiles Sa DEVICE AND METHOD FOR MANAGING THE ELECTRIC CHARGE LEVEL WHEN SUPPORTING AN ELECTROCHEMICAL STORAGE SOURCE ON BOARD IN A VEHICLE
FR2942087B1 (en) * 2009-02-12 2011-02-18 Peugeot Citroen Automobiles Sa DEVICE AND METHOD FOR MANAGING THE ELECTRIC CHARGE LEVEL WHEN SUPPORTING AN ELECTROCHEMICAL STORAGE SOURCE ON BOARD IN A VEHICLE
FR2942602A1 (en) 2009-02-27 2010-09-03 Peugeot Citroen Automobiles Sa DEVICE AND METHOD FOR OPTIMIZED MANAGEMENT OF THE ELECTRIC ENERGY OF AN ELECTROCHEMICAL STORAGE SOURCE ON BOARD IN A HYBRID VEHICLE
DE102009025132A1 (en) * 2009-06-17 2010-12-23 Bayerische Motoren Werke Aktiengesellschaft Energy storage charging system
FR2953340B1 (en) * 2009-11-27 2014-03-28 Peugeot Citroen Automobiles Sa DEVICE AND METHOD FOR PREDICTIVE MANAGEMENT OF ELECTRIC ENERGY OF AN ELECTROCHEMICAL STORAGE SOURCE ON BOARD IN A HYBRID VEHICLE
DE102017221825B4 (en) * 2017-12-04 2019-06-27 Audi Ag Method for controlling an electrical system of an electrically driven motor vehicle
FR3076539B1 (en) * 2018-01-08 2021-04-02 Poste REMOVABLE SECONDARY BATTERY DEVICE FOR ELECTRIC BIKES

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JP3073975B1 (en) * 1999-02-03 2000-08-07 本田技研工業株式会社 Control device for hybrid vehicle
JP3560867B2 (en) * 1999-08-31 2004-09-02 本田技研工業株式会社 Hybrid vehicle battery control device
JP3615445B2 (en) * 2000-01-31 2005-02-02 三洋電機株式会社 Hybrid car power supply
JP2003259508A (en) * 2002-02-26 2003-09-12 Sanyo Electric Co Ltd Power unit for electric vehicle

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FR2891774B1 (en) 2008-11-28

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