EP2898585A2 - System and method for electrical vehicle supply - Google Patents

System and method for electrical vehicle supply

Info

Publication number
EP2898585A2
EP2898585A2 EP13758928.9A EP13758928A EP2898585A2 EP 2898585 A2 EP2898585 A2 EP 2898585A2 EP 13758928 A EP13758928 A EP 13758928A EP 2898585 A2 EP2898585 A2 EP 2898585A2
Authority
EP
European Patent Office
Prior art keywords
high voltage
network
voltage battery
voltage network
vehicle
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Withdrawn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
EP13758928.9A
Other languages
German (de)
French (fr)
Inventor
Eric Chauvelier
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 EP2898585A2 publication Critical patent/EP2898585A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • 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
    • B60L58/12—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]
    • B60L58/13—Maintaining the SoC within a determined range
    • 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
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

  • the present invention relates to a power supply system of an electric vehicle, of the type comprising a low voltage network for supplying servitudes of the vehicle and a high voltage network for supplying vehicle drive means.
  • a power supply system of an electric vehicle of the type comprising a low voltage network for supplying servitudes of the vehicle and a high voltage network for supplying vehicle drive means.
  • an electric vehicle comprises a power supply system with two separate networks: a high voltage network dedicated to the drive of the vehicle, for powering motors, and a low voltage network can supply servitudes such as the air conditioning of the vehicle. lighting, signaling functions and calculators, each network has a storage battery afi to provide the necessary energy.
  • Charging means are provided for recharging the batteries from an external power supply, for example from a home network.
  • a first converter supplies the low voltage network from the high voltage network
  • a second converter supplies the high voltage network from the home network.
  • the high voltage battery is connected to the high voltage network via switching means such as a conlactor to isolate the battery when it is not used.
  • switching means such as a conlactor to isolate the battery when it is not used.
  • it is connected when the driver of the vehicle turns it on to be ready to use it, or when the high voltage battery is charged by the home network. complete- by the home network, the second converter-puts in state of rest and disconnects from the high voltage network.
  • the vehicle When the vehicle is not in use, it is in a sleep state in which the high voltage battery is disconnected and your computers are in a sleep mode.
  • the consumption of computers on the low voltage network in standby mode is very low, but is not zero.
  • the battery of the low voltage network ends up being discharged. This can happen when the vehicle is stored at the factory before being delivered to the customer, or when the customer has gone on vacation without the vehicle that remains in the garage. In this case, the voltage is so low that your computers are no longer able to leave the standby mode. The vehicle can then not be restarted, even if it would have a high voltage battery at full load.
  • the invention therefore aims to provide a system and a method of powering an electric vehicle to extend the possible storage time by avoiding the aforementioned failure.
  • the subject of the invention is a power supply system for an electric vehicle, the system comprising a low-voltage network for supplying servitudes of the vehicle, a high-voltage network for powering drive means of the vehicle.
  • vehicle the low voltage network comprising a low voltage battery for accumulating electrical energy and a first converter connected to the high voltage network for supplying the low voltage network, ie high voltage network comprising a high voltage battery and switching means for isolating the high voltage battery
  • the system further comprising a first supervisor for controlling the switching means, the system being characterized in that it further comprises first monitoring means for determining whether the load of the Low voltage battery is less than or greater than a first threshold, the first supervisor being arranged to drive the switching means to connect the high voltage battery if the first monitoring means indicate that the charge of the low voltage battery is lower than the first threshold.
  • the switching means When the switching means establish the connection between the battery and the high voltage network, the first converter is powered and thus allows its recharging of the low voltage battery.
  • the reserve of the high-voltage battery is thus used to prolong the improvement of the low-voltage battery.
  • the possible storage time of the vehicle without risk of failure is greatly increased, so as to cover most cases.
  • the duration of autonomy thus goes from several weeks to a period of several months.
  • the supervisor has a sleep mode in which i! performs only a wake up function and an awake mode in which it performs multiple functions, the supervisor being arranged to switch from sleep mode to cycially awake mode and monitor the charge of the low voltage battery and return to sleep mode after the check .
  • the checks are thus scheduled at regular intervals, so that the supervisor remains in the sleeping mode most of the time and thus has the minimum power consumption.
  • the autonomy is increased,
  • the system comprises a second converter comprising connection means to an external power supply network for powering the high-voltage network.
  • the second converter allows normal charging of both batteries simultaneously, feeding the high voltage network.
  • the system comprises signaling means for signaling that the switching means connect the high voltage battery to the high voltage network. A user of the vehicle or a person in charge of its maintenance is thus warned of the potential electrical risk on the high voltage circuit.
  • the invention also relates to a method of controlling a power supply system of an electric vehicle, the system comprising a low voltage network for supplying servitudes of the vehicle, a high voltage network for supplying drive means of the vehicle, the low-voltage network comprising a low-voltage battery for accumulating electrical energy and a first converter connected to the high-voltage network for supplying the low-voltage network, the high-voltage network comprising a high-voltage battery, switching means for isolating the high voltage battery, the method being characterized by controlling the switching means if it is determined that its charge of the low voltage battery is lower than a first threshold so as to connect the high voltage battery.
  • the charging of the low-voltage battery is cyclically performed by passing the vehicle from a sleep mode, in which only a wake-up function is performed, to awake mode.
  • a second converter having connection means to an external power supply network for supplying the high-voltage network, if the second converter is connected to the external network, the second is further switched. converter at the same time as the switching means for supplying the high voltage network.
  • the second converter is generally provided to stop once the charging of the batteries is completed.
  • the single figure shows an electric vehicle 1 comprising drive means, not shown, supplied with electrical energy.
  • the vehicle 1 comprises connection means 1240 to be connected to an external home network, capable of supplying electricity, for example alternating current at a voltage of 230 V.
  • the electricity supplied by the home network is stored in batteries, detailed below, in order to feed in particular Its drive means without the vehicle 1 is connected to the home network.
  • the vehicle 1 comprises a power supply system. That consists essentially of a low voltage network 10 to supply servitudes 11 of the vehicle 1 and a high voltage network 12 to supply the drive means.
  • the low voltage network 10 comprises a low voltage battery 100 for accumulating electrical energy and a first converter 102 connected to the high voltage network 12 for supplying the low voltage network. 10.
  • the low-voltage battery 100 makes it possible, for example, to deliver a voltage of 12 V.
  • the high-voltage network 2 comprises a high-voltage battery 20 and switching means 22 for isolating the high-voltage battery 120.
  • the power supply system further comprises a first supervisor 14 for controlling the switching means 122.
  • the high voltage network 12 further comprises a second converter 124 comprising the connection means 1240 to the external power supply network and which is arranged to feed the high voltage network 12. If for example provides a DC voltage of 40.0 V. It also includes a second supervisor 16 arranged to manage the second converter 124.
  • the power supply system also comprises first monitoring means 17 in the form of a tensson sensor and making it possible to determine an alert on a charge level of the low-voltage battery 100.
  • the first monitoring means 17 are connected to each other. to the first supervisor 14.
  • the power supply system further comprises second monitoring means 18 for determining an alert on a charge level of the high voltage battery 120.
  • the second monitoring means 18 are connected to the second supervisor 10.
  • the power supply system also comprises signaling means 19 controlled by the first supervisor 14 and arranged to transmit information on the state of the vehicle 1.
  • the signaling means may be a visual warning device generating a continuous light. or flashing, located on the vehicle board, outside the vehicle or. in the. engine compartment, or a buzzer.
  • the second supervisor 16 is provided to handle the load of the high tensson battery 120. For this, it detects the connection of the external home network and controls the converter to that it provides the high voltage on the high voltage network 12. The second supervisor 16 receives information from the second monitoring means 18 so as to determine i Instant at which the battery high voltage 120 is loaded. The second converter 124 is then controlled to stop feeding the high voltage network 12.
  • the first supervisor 14 includes a sleep mode in which it performs only a wake up function and an awake mode in which it performs multiple functions.
  • the transition from sleep mode to awake mode is typically controlled by the user when the latter plans to use the vehicle 1, for example by switching on a key.
  • the transition from awake mode to sleep mode is controlled by the triggering of the ignition key, after a possible delay.
  • the first supervisor 14 is arranged to also go from sleep mode to awake mode sensitively, to monitor the charge of the low voltage battery 100 through the first monitoring means 17. and return to the sleep mode after verification.
  • the first monitoring means 17 directly provide a voltage level, from which the first supervisor 14 derives a charge level from the low voltage battery 100. This charge level is then compared to a first threshold.
  • the first supervisor 14 determines that the low-voltage battery 100 must be recharged. The first supervisor 14 then drives the switching means 122 to connect the high voltage battery 120 to the high voltage network 12. The first converter 102 is then powered and thus supplies DC power to the low voltage network 10, so as to recharge the low battery. At the same time, the first supervisor 14 controls the signaling means 19 to warn the users of the vehicle 1 that the high voltage network 12 is powered.
  • the first supervisor 14 sends a request to the second supervisor 16 to switch the second converter 124 to supply the high voltage network 12.
  • the first supervisor will receive information from the second supervisory means. 18 directly or through the second supervisor 18 to alert when the load of the high voltage battery 120 is less than a second threshold.
  • the first supervisor 14 does not control the connection of the switching means 122, in order to preserve a minimum level of charge of the high-voltage battery 120,
  • one. provides that the connection of switching means 122 is performed only if the home network is connected

Abstract

The invention relates to an electric power supply system for an electric vehicle (1), comprising a low-voltage network (10) for powering the auxiliary devices of the vehicle (1) and a high-voltage network (12) for powering the propulsion means of the vehicle (1). The low-voltage network (10) comprises a low-voltage battery (100) for storing electric energy and a first converter (102) connected to the high-voltage network (12) for powering the low-voltage network (10), while the high-voltage network (12) comprises a high-voltage battery (120) and switching means (122) for isolating the high-voltage battery (120). In addition, the system comprises a first supervisor (14) for controlling the switching means (122). The system is characterised in that it also comprises first monitoring means (17) for determining if the charge of the low-voltage battery (100) is below or above a first threshold, said supervisor being arranged to control the switching means (122) in order to connect the high-voltage battery (120) if the first monitoring means (17) indicate that the battery charge is below the first threshold.

Description

SYSTEME ET PROCEDE D'ÂLIMENTÂTiON POUR UN VEHICULE SYSTEM AND METHOD FOR SUPPLYING A VEHICLE
ELECTRIQUE ELECTRIC
Do m a ! n e ί eçh n i u & Do me! n e ί eh
La présente invention se rapporte à un .système d'alimentation électrique d'un véhicule électrique, du type comportant un réseau basse tension pour alimenter des servitudes du véhicule et un réseau haute tension pour alimenter des moyens d'entraînement du véhicule. Etat de la technique  The present invention relates to a power supply system of an electric vehicle, of the type comprising a low voltage network for supplying servitudes of the vehicle and a high voltage network for supplying vehicle drive means. State of the art
Généralement un véhicule électrique comporte un système d'alimentation électrique avec deux réseaux distincts : un réseau haute tension dédié à l'entraînement du véhicule, pour alimenter des moteurs, et un réseau basse tension peur alimenter les servitudes telles que la climatisation du véhicule, l'éclairage, les fonctions de signalisation et des calculateurs, Chaque réseau est équipé d'une batterie d'accumulateurs afi de fournir l'énergie nécessaire. Generally an electric vehicle comprises a power supply system with two separate networks: a high voltage network dedicated to the drive of the vehicle, for powering motors, and a low voltage network can supply servitudes such as the air conditioning of the vehicle. lighting, signaling functions and calculators, each network has a storage battery afi to provide the necessary energy.
Des moyens de recharge sont prévus pour recharger les batteries à partir d'une alimentation électrique externe, par exemple â partir d'un réseau domestique. Différentes configurations sont possibles, parmi lesquelles une disposition dans laquelle un premier convertisseur alimente le réseau basse tension à partir du réseau haute tension et un deuxième convertisseur alimente le réseau haute tension à partir du réseau domestique. La batterie haute tension est connectée au réseau haute tension par l'intermédiaire de moyens de commutation comme un conlacteur afin d'isoler la batterie lorsque celle-ci n'est pas utilisée. Par contre, elle est connectée lorsque le conducteur du véhicule met celui-ci sous tension pour être prêt à l'utiliser, ou lorsque la batterie haute tension est mise en charge pa le réseau domestique.. Après une recharge complète- par le réseau domestique, le deuxième convertisseur -se met en état de repos et se déconnecte du réseau haute tension. Charging means are provided for recharging the batteries from an external power supply, for example from a home network. Different configurations are possible, among which an arrangement in which a first converter supplies the low voltage network from the high voltage network and a second converter supplies the high voltage network from the home network. The high voltage battery is connected to the high voltage network via switching means such as a conlactor to isolate the battery when it is not used. On the other hand, it is connected when the driver of the vehicle turns it on to be ready to use it, or when the high voltage battery is charged by the home network. complete- by the home network, the second converter-puts in state of rest and disconnects from the high voltage network.
Lorsque le véhicule n'est pas utilisé, il est dans un état endormi dans lequel la batterie haute tension est déconnectée et tes calculateurs sont dans un mode de veille. La consommation des calculateurs sur le réseau basse tension en mode de veille est très réduite, mais n'est pas nulle.  When the vehicle is not in use, it is in a sleep state in which the high voltage battery is disconnected and your computers are in a sleep mode. The consumption of computers on the low voltage network in standby mode is very low, but is not zero.
Lorsque Se véhicule est stocké longtemps sans sortir du mode endormi, la batterie du réseau basse tension finit par être déchargée. Ceci peut se produire lorsque le véhicule est stocké en sortie d'usine avant d'être livré au client, ou lorsque le client est parti en vacances sans ce véhicule qui reste ainsi au garage. Dans ce cas, la tension est si faible que tes calculateurs ne sont plus à même de quitter le mode de veille. Le véhicule peut alors pas être remis en route,, quand bien même II disposerait d'une batterie haute tension à pleine charge.  When the vehicle is stored for a long time without going out of sleep mode, the battery of the low voltage network ends up being discharged. This can happen when the vehicle is stored at the factory before being delivered to the customer, or when the customer has gone on vacation without the vehicle that remains in the garage. In this case, the voltage is so low that your computers are no longer able to leave the standby mode. The vehicle can then not be restarted, even if it would have a high voltage battery at full load.
L'invention vise donc à fournir un système et un procédé d'alimentation d'un véhicule électrique permettant de prolonger la durée possible de stockage en évitant la panne évoquée précédemment.  The invention therefore aims to provide a system and a method of powering an electric vehicle to extend the possible storage time by avoiding the aforementioned failure.
Description de l'invention Description of the invention
Avec ces objectifs en vue, l'invention a pour objet un système d'alimentation électrique d'un véhicule électrique, le système comportant un réseau basse tension pour alimenter des servitudes du véhicule, un réseau haute tension pour alimenter des moyens d'entraînement du véhicule, le réseau basse tension comportant une batterie basse tension pour accumuler de ('énergie électrique et un premier convertisseur connecté au réseau haute tension pour alimenter le réseau basse tension, ie réseau haute tension comportant une batteri haute tension et des moyens de commutation pour isoler la batterie haute tension, le système comportant en outre un premier superviseur pour piloter tes moyens de Commutation, le système étant caractérisé en ce qu'il comporte en outre des premiers moyens de surveillance pour déterminer si la charge de la batterie basse tension est inférieure ou supérieur à un premier seuil, le premier superviseur étant agencé pour piloter ies moyens de commutation pour connecter la batterie haute tension si les premiers moyens de surveillance indiquent que la charge de la batterie basse tension est inférieure au premier seuil. With these objectives in view, the subject of the invention is a power supply system for an electric vehicle, the system comprising a low-voltage network for supplying servitudes of the vehicle, a high-voltage network for powering drive means of the vehicle. vehicle, the low voltage network comprising a low voltage battery for accumulating electrical energy and a first converter connected to the high voltage network for supplying the low voltage network, ie high voltage network comprising a high voltage battery and switching means for isolating the high voltage battery, the system further comprising a first supervisor for controlling the switching means, the system being characterized in that it further comprises first monitoring means for determining whether the load of the Low voltage battery is less than or greater than a first threshold, the first supervisor being arranged to drive the switching means to connect the high voltage battery if the first monitoring means indicate that the charge of the low voltage battery is lower than the first threshold.
Lorsque ies moyens de commutation établissent la connexion entre la batterie et le réseau haute tension, ie premier convertisseur est alimenté et permet ainsi Sa recharge de la batterie basse tension. On utilise ainsi la réserve de la batterie haute tension pour prolonger i'auiornnomie de la batterie basse- tension. La durée de stockage possible du véhicule sans risque de panne est très largement augmentée, de manière à couvrir la plupart des cas de figure. Typiquement, la durée d'autonomie passe ainsi de plusieurs semaines à une durée de plusieurs mois.  When the switching means establish the connection between the battery and the high voltage network, the first converter is powered and thus allows its recharging of the low voltage battery. The reserve of the high-voltage battery is thus used to prolong the improvement of the low-voltage battery. The possible storage time of the vehicle without risk of failure is greatly increased, so as to cover most cases. Typically, the duration of autonomy thus goes from several weeks to a period of several months.
De manière particulière, Se superviseur comporte un mode endormi dans lequel i! ne réalise qu'une fonction de réveil et un mode éveillé dans lequel ii réalise de multiples fonctions, te superviseur étant agencé pour passer du mode endormi au mode éveillé cyciiquement et surveiller la charge de ia batterie basse tension et revenir au mode endormi après la vérification. On prévoit ainsi les vérifications â intervalles réguliers, de telle sorte que le superviseur reste ia plupart du temps en mode endormi et ait ainsi la consommation électrique minimale. L'autonomie s'en trouve augmentée,  In particular, the supervisor has a sleep mode in which i! performs only a wake up function and an awake mode in which it performs multiple functions, the supervisor being arranged to switch from sleep mode to cycially awake mode and monitor the charge of the low voltage battery and return to sleep mode after the check . The checks are thus scheduled at regular intervals, so that the supervisor remains in the sleeping mode most of the time and thus has the minimum power consumption. The autonomy is increased,
De manière complémentaire, le système comporte un deuxième convertisseur comportant des moyens de connexion à un réseau d'alimentation externe pou alimenter le réseau haute tension. Le deuxième convertisseur permet la charge normale des deux batteries simultanément, en alimentant le réseau haute tension.  In a complementary manner, the system comprises a second converter comprising connection means to an external power supply network for powering the high-voltage network. The second converter allows normal charging of both batteries simultaneously, feeding the high voltage network.
Selon un perfectionnement, le système comporte des moyens de signalisation pour signaler que les moyens de commutation relient la batterie haute tension au réseau haute tension. Un utilisateur du véhicule ou une personne chargée de sa maintenance est ainsi averti du risque électrique potentiel sur le- circuit haute tension. According to an improvement, the system comprises signaling means for signaling that the switching means connect the high voltage battery to the high voltage network. A user of the vehicle or a person in charge of its maintenance is thus warned of the potential electrical risk on the high voltage circuit.
L'invention a aussi pour objet un pocédé de commande d'un système d'alimentation électrique d'un véhicule électrique, te système comportant un réseau basse tension pour alimenter des servitudes du véhicule, un réseau haute tension pour alimenter des moyens d'entraînement du véhicule, le réseau basse tension comportant une batterie basse tension pour accumuler de l'énergie électrique et un premier convertisseur connecté au réseau haute tension pour alimenter le réseau basse tension, le réseau haute tension comportant une batterie haute tension, des moyens de commutation pou isoler la batterie haute tension, le procédé étant caractérisé en ce qu'on pilote les moyens de commutation si on déterminé que Sa charge de la batterie basse tension est inférieure à un premier seuil de manière â connecter la batterie haute tension.  The invention also relates to a method of controlling a power supply system of an electric vehicle, the system comprising a low voltage network for supplying servitudes of the vehicle, a high voltage network for supplying drive means of the vehicle, the low-voltage network comprising a low-voltage battery for accumulating electrical energy and a first converter connected to the high-voltage network for supplying the low-voltage network, the high-voltage network comprising a high-voltage battery, switching means for isolating the high voltage battery, the method being characterized by controlling the switching means if it is determined that its charge of the low voltage battery is lower than a first threshold so as to connect the high voltage battery.
Selon d'autres caractéristiques :  According to other characteristics:
on effectue la vérification de la charge de la batterie basse tension de manière cyclique en passant le véhicule d'un mode endormi, dans lequel seule une fonction de réveil est réalisée, à u mode éveillé.  the charging of the low-voltage battery is cyclically performed by passing the vehicle from a sleep mode, in which only a wake-up function is performed, to awake mode.
pour un système d'alimentation comportant en outre un deuxième convertisseur comportant des moyens de connexion à un réseau d'alimentation externe pour alimenter le réseau haute tension, si le deuxième convertisseur est connecté au réseau externe, on commute en outre le- deuxième.. convertisseur en même temps que les moyens de commutation pour alimente le réseau haute tension. Le deuxième convertisseur est généralement prévu pour s'arrêter une fois que la charge des batteries est réalisée. On fournit ici les moyens de réactiver l'alimentation par le réseau domestique si celui-ci est resté connecté au véhicule. La charge de la batterie haute tension est ainsi préservée. on interdit la connexion des moyens de commutation si ia charge de la' batterie hauts tension est inférieure à un deuxième seuil. On préserve ainsi .une charge résiduelle dans la batterie haute tension, for a power system further comprising a second converter having connection means to an external power supply network for supplying the high-voltage network, if the second converter is connected to the external network, the second is further switched. converter at the same time as the switching means for supplying the high voltage network. The second converter is generally provided to stop once the charging of the batteries is completed. Here we provide the means to reactivate the power supply via the home network if it has remained connected to the vehicle. The charge of the high voltage battery is thus preserved. it prohibits the connection switching means if ia load the 'high voltage battery is lower than a second threshold. This preserves a residual charge in the high-voltage battery,
Brève description de la figure Brief description of the figure
L'invention sera mieux comprise et d'autres particularités et avantages apparaîtront à Sa lecture de la description qui. va suivre, la description faisant référence à ia figure unique, laquelle représente un diagramme schématique d'un véhicule comportant un système selon l'invention. DESCRIPTION DETAILLEE  The invention will be better understood and other features and advantages will appear on reading the description. The description will be followed with reference to the single figure, which represents a schematic diagram of a vehicle comprising a system according to the invention. DETAILED DESCRIPTION
La figure unique montre un véhicule 1 électrique comportant des moyens d'entraînement, non représentés, alimentes en énergie électrique. Le véhicule 1 comporte des moyens de connexion 1240 pour être branché sur un réseau domestique externe, apte à fournir de l'électricité, par exemple en courant alternatif à une tension de 230 V. L'électricité fournie par le réseau domestique est stockée dans des batteries, détaillées ci- après, afin d'alimenter en particulier Ses moyens d'entraînement sans que le véhicule 1 soit connecté au réseau domestique.  The single figure shows an electric vehicle 1 comprising drive means, not shown, supplied with electrical energy. The vehicle 1 comprises connection means 1240 to be connected to an external home network, capable of supplying electricity, for example alternating current at a voltage of 230 V. The electricity supplied by the home network is stored in batteries, detailed below, in order to feed in particular Its drive means without the vehicle 1 is connected to the home network.
Le véhicule 1 comporte un système d'alimentation électrique. Celui est composé essentiellement d'un réseau basse tension 10 pour alimenter des servitudes 11 du véhicule 1 et d'un réseau haute tension 12 pour alimenter les moyens d'entraînement. Le réseau basse tension 10 comporte une batterie basse tension 100 pour accumuler de l'énergie électrique et un premier convertisseur 102 connecté au réseau haute tension 12 pour alimenter ie réseau basse tension. 10. La batterie basse tension 100 permet de délivrer par exemple une tension de 12V, Le réseau haute tension 2 comporte une batterie haute tension 20 et des moyens de commutation 22 pour isoler la batterie haute tension 120.  The vehicle 1 comprises a power supply system. That consists essentially of a low voltage network 10 to supply servitudes 11 of the vehicle 1 and a high voltage network 12 to supply the drive means. The low voltage network 10 comprises a low voltage battery 100 for accumulating electrical energy and a first converter 102 connected to the high voltage network 12 for supplying the low voltage network. 10. The low-voltage battery 100 makes it possible, for example, to deliver a voltage of 12 V. The high-voltage network 2 comprises a high-voltage battery 20 and switching means 22 for isolating the high-voltage battery 120.
Le système d'alimentation électrique comporte en outre un premier superviseur 14 pour piloter les moyens de commutation 122. Le réseau haute tension 12 comporte en outre un deuxième convertisseur 124 comportant les moyens de connexion 1240 au réseau d'alimentation externe et qui est agencé pour alimenter le réseau haute tension 12. Si fournit par exemple une tension continue de 40.0 V. Il comporte également un deuxième superviseur 16 agencé pour gérer le deuxième convertisseur 124. The power supply system further comprises a first supervisor 14 for controlling the switching means 122. The high voltage network 12 further comprises a second converter 124 comprising the connection means 1240 to the external power supply network and which is arranged to feed the high voltage network 12. If for example provides a DC voltage of 40.0 V. It also includes a second supervisor 16 arranged to manage the second converter 124.
Le système d'alimentation électrique comporte aussi des premiers moyens de surveillance 17 sous la forme d'un capteur de tensson et permettant de déterminer une alerte sur un niveau .de charge de la batterie basse tension 100. Les premiers moyens de surveillance 17 sont reliés au premier superviseur 14.  The power supply system also comprises first monitoring means 17 in the form of a tensson sensor and making it possible to determine an alert on a charge level of the low-voltage battery 100. The first monitoring means 17 are connected to each other. to the first supervisor 14.
Le système d'alimentation électrique comporte en outre des deuxièmes moyens de surveillance 18 permettant de déterminer une alerte sur un niveau de charge de la batterse haute tension 120. Les deuxièmes moyens de surveillance 18 sont reliés au deuxième superviseur 10.  The power supply system further comprises second monitoring means 18 for determining an alert on a charge level of the high voltage battery 120. The second monitoring means 18 are connected to the second supervisor 10.
Le système d'alimentation électrique comporte également des moyens de signalisation 19 pilotés par le premier superviseur 14 et agencés pour transmettre une information sur l'état du véhicule- 1. Les moyens de signalisation peuvent être un dispositif d'alerte visuelle générant une lumière continue ou clignotante, disposé sur le tablea de bord du véhicule, à l'extérieur du véhicule ou. dans le. compartiment moteur, ou un avertisseur sonore.  The power supply system also comprises signaling means 19 controlled by the first supervisor 14 and arranged to transmit information on the state of the vehicle 1. The signaling means may be a visual warning device generating a continuous light. or flashing, located on the vehicle board, outside the vehicle or. in the. engine compartment, or a buzzer.
Fonctionnement Operation
Le deuxième superviseur 16 est prévu pour gérer la charge de la batterie haute tensson 120. Pour cela il détecte la connection du réseau domestique externe et pilote le convertisseur pour qu'il fournisse la haute tension continue sur le réseau haute tension 12. Le deuxième superviseur 16 reçoit des informations de la part des deuxièmes moyens de surveillance 18 de manière à déterminer i Instant auquel la batterie haute tension 120 est chargée. Le deuxième convertisseur 124 est alors piloté pour cesser É'alimentation du réseau haute tension 12. The second supervisor 16 is provided to handle the load of the high tensson battery 120. For this, it detects the connection of the external home network and controls the converter to that it provides the high voltage on the high voltage network 12. The second supervisor 16 receives information from the second monitoring means 18 so as to determine i Instant at which the battery high voltage 120 is loaded. The second converter 124 is then controlled to stop feeding the high voltage network 12.
Le premier superviseur 14 comporte un mode endormi dans lequel il ne réalise qu'une fonction de réveil et un mode éveillé dans lequel il réalise de multiples fonctions. Le passage du mode endormi au mode éveillé est commandé typiquement par l'utilisateur lorsque celui-ci prévoit d'utiliser le véhicule 1 , par exemple en enclenchant une clé de contact. De même, Se passage du mode éveillé au mode endormi est commandé par ie déclenchement de la clé de contact, .après une éventuelle temporisation. Le premier superviseur 14 est agencé pour passer également du mode endormi au mode éveille çyciiquement, pour surveiller la charge de la batterie basse tension 100 grâce aux premiers moyens de surveillance 17. et revenir au mode endormi après la vérification. Les premiers moyens de surveillance 17 fournissent directement un niveau de tension, duquel le premier superviseur 14 déduit un niveau de charge de la batterie basse tension 100. Ce niveau de charge est ensuite comparé à un premier seuil. Si la charge de la batterie basse tension 100 est inférieure au premier seuil, le premier superviseur 14 détermine que la batterie basse tension 100 doit être rechargée. Le premier superviseur 14 pilote alors les moyens de commutation 122 pour connecter la batterie haute tension 120 au réseau haute tension 12. Le premier convertisseur 102 est alors alimenté et fournit ainsi du courant continu au réseau basse tension 10, de manière à recharger la batterie basse tension 100. Dans le même temps, ie premier superviseur 14 pilote les moyens de signalisation 19 pour avertir les utilisateurs du véhicule 1 que le réseau haute tension 12 est alimenté.  The first supervisor 14 includes a sleep mode in which it performs only a wake up function and an awake mode in which it performs multiple functions. The transition from sleep mode to awake mode is typically controlled by the user when the latter plans to use the vehicle 1, for example by switching on a key. Likewise, the transition from awake mode to sleep mode is controlled by the triggering of the ignition key, after a possible delay. The first supervisor 14 is arranged to also go from sleep mode to awake mode sensitively, to monitor the charge of the low voltage battery 100 through the first monitoring means 17. and return to the sleep mode after verification. The first monitoring means 17 directly provide a voltage level, from which the first supervisor 14 derives a charge level from the low voltage battery 100. This charge level is then compared to a first threshold. If the charge of the low-voltage battery 100 is lower than the first threshold, the first supervisor 14 determines that the low-voltage battery 100 must be recharged. The first supervisor 14 then drives the switching means 122 to connect the high voltage battery 120 to the high voltage network 12. The first converter 102 is then powered and thus supplies DC power to the low voltage network 10, so as to recharge the low battery. At the same time, the first supervisor 14 controls the signaling means 19 to warn the users of the vehicle 1 that the high voltage network 12 is powered.
Si le deuxième convertisseur 124 est connecté au réseau externe, le premier superviseur 14 envoie une demande au deuxième superviseur 16 pour qu'il commute le deuxième convertisseur 124 pour alimenter le réseau haute tension 12.  If the second converter 124 is connected to the external network, the first supervisor 14 sends a request to the second supervisor 16 to switch the second converter 124 to supply the high voltage network 12.
Selon une disposition optionnelle, on prévoit que le premier superviseur reçoit Li e information des deuxièmes moyens de surveillance 18 directement ou par l'intermédiaire du deuxième superviseur 18 pour alerter lorsque la charge de la batterie haute tension 120 est inférieure à un deuxième seuil. Dans ce cas le premier superviseur 14 ne pilote pas ia connexion des moyens de commutation 122, afin de préserver un niveau minimal de charge de la batterie haute tension 120, According to an optional provision, it is expected that the first supervisor will receive information from the second supervisory means. 18 directly or through the second supervisor 18 to alert when the load of the high voltage battery 120 is less than a second threshold. In this case the first supervisor 14 does not control the connection of the switching means 122, in order to preserve a minimum level of charge of the high-voltage battery 120,
Selon une autre disposition optionnelle, on. prévoit que la connexion des moyens de commutation 122 n'est réalisée que si le reséau domestique est connecté,  According to another optional provision, one. provides that the connection of switching means 122 is performed only if the home network is connected,

Claims

REVENDICATIONS
1. Système d'alimentation électrique d'un véhicule (1 ) électrique, le système comportant un réseau basse tension (10) pour alimenter des servitudes du véhicule (T), un réseau haute tension (12) pour alimenter des moyens d'entraînement du véhicule (1). le réseau basse tension (10) comportent une batterie basse tension (100) pour accumuler de l'énergie électrique et un premier convertisseur (102) connecté au réseau haute tension (12) pour alimenter le réseau basse tension (10), le réseau haute tension (12) comportant une batterie haute tension (120) et des moyens de commutation (1:2:2) pour isoler la batterie haute tension (120), le système comportant en outre un premier superviseur (14) pour piloter les moyens de commutation (122), le système étant caractérisé en ce -qu'il comporte en outre des premiers moyens de surveillance (17) pour déterminer si Sa charge de la batterie basse tension (100) est inférieure ou supérieure à un premier seuil, le premier superviseur {14} étant agencé peur piloter les. moyens de commutation (122) pour connecter la batterie haute tension (120) si les premiers moyens de surveillance (17) indiquent que la charge de ia batterie basse tension ( 00) est inférieure au premier seuil. 1. Power supply system for an electric vehicle (1), the system comprising a low voltage network (10) for powering the vehicle's facilities (T), a high voltage network (12) for powering drive means of the vehicle (1). the low voltage network (10) comprises a low voltage battery (100) for accumulating electrical energy and a first converter (102) connected to the high voltage network (12) to supply the low voltage network (10), the high voltage network voltage (12) comprising a high voltage battery (120) and switching means (1:2:2) for isolating the high voltage battery (120), the system further comprising a first supervisor (14) for controlling the means of switching (122), the system being characterized in that it further comprises first monitoring means (17) for determining whether its charge of the low voltage battery (100) is lower or higher than a first threshold, the first supervisor {14} being arranged to control them. switching means (122) for connecting the high voltage battery (120) if the first monitoring means (17) indicate that the charge of the low voltage battery (00) is lower than the first threshold.
2. Système selon la revendication 1 , dans lequel ie superviseur comporte un mode endormi dans lequel il ne réalise qu'une fonction de réveil et un mode éveillé, dans lequel il réalise de multiples fonctions, le superviseur étant agencé pour passer du mode endormi au modo éveillé cycliquement et surveiller la charge de ia batterie basse tension (100) et revenir au mode endormi après ia vérification. 2. System according to claim 1, in which the supervisor comprises a sleeping mode in which it only performs a wake-up function and an awake mode, in which it performs multiple functions, the supervisor being arranged to switch from sleeping mode to wake mode cyclically and monitor the charge of the low voltage battery (100) and return to sleep mode after checking.
3. Système selon ia revendication 1 , caractérisé en ce qu'il comporte un deuxième convertisseur (124) comportant des moyens de connexion à un réseau d'alimentation externe pour alimenter ie réseau haute tension (12). 3. System according to claim 1, characterized in that it comprises a second converter (124) comprising means of connection to an external power supply network to supply the high voltage network (12).
4, Système selon la revendication 1 , caractérisé en ce qu'il comporte des moyens de signalisation (19) pour signaler que les moyens de commutation (122) relient la batterie haute tension (120) au réseau haute tension (12). 4, System according to claim 1, characterized in that it comprises signaling means (19) to signal that the switching means (122) connect the high voltage battery (120) to the high voltage network (12).
S. Procédé de commande d'un système d'alimentation électrique d'un véhicule électrique, le système comportant un- réseau basse tension (10) pour alimenter des servitudes du véhicule (1 ), un réseau haute tension (12) pour alimenter des moyens d'entraînement du véhicule (1), te réseau basse tension (10) comportant une batterie basse tension (100) pour accumuler de l'énergie électrique et un premier convertisseur (102) connecté au réseau haute tension (12) pour alimenter le réseau basse tension (10), le réseau haute tension (12) comportant une batterie haute tension (120), des moyens de commutation (122) pour isoler la batterie haute tension (120), le procédé étant caractérisé en ce qu'on pilote les moyens- de commutation (122) si on détermine que la -charge de la batterie basse tension (100) est inférieure à un premier seuil de manière à connecter la batterie haute tension ( 20). S. Method for controlling an electrical supply system of an electric vehicle, the system comprising a low-voltage network (10) for supplying vehicle facilities (1), a high-voltage network (12) for supplying vehicle drive means (1), the low voltage network (10) comprising a low voltage battery (100) for accumulating electrical energy and a first converter (102) connected to the high voltage network (12) to power the low voltage network (10), the high voltage network (12) comprising a high voltage battery (120), switching means (122) for isolating the high voltage battery (120), the method being characterized in that it is controlled the switching means (122) if it is determined that the charge of the low voltage battery (100) is less than a first threshold so as to connect the high voltage battery (20).
8. Procédé selon la revendication 5, selon lequel on effectue la vérification de la charge de la batterie basse tension (100) de manière cyclique en passant le véhicule (1) d'un mode endormi, dans lequel seule une fonction de réveil est réalisée, à .un mode éveillé. 8. Method according to claim 5, according to which the charge of the low voltage battery (100) is checked cyclically by switching the vehicle (1) from a sleeping mode, in which only a wake-up function is carried out , in an awake mode.
7. Procédé de commande selon la revendication 5, pour un systèm d'alimentation comportant en outre un deuxième convertisseur (124) comportant des moyens de connexion à un réseau d'alimentation externe pour alimenter le réseau haute tension (12), selon lequel, si le deuxième convertisseur (12.4) est connecté au réseau externe, on commute en outre Se deuxième convertisseur (124) en même temps que les moyens de commutation (122) pour alimenter le réseau haute tension i l 7. Control method according to claim 5, for a power supply system further comprising a second converter (124) comprising means of connection to an external power network for supplying the high voltage network (12), according to which, if the second converter (12.4) is connected to the external network, the second converter (124) is also switched at the same time as the switching means (122) to supply the high voltage network he
8. Procédé de commande selon ia revendication 5, selon lequel on interdit la connexion des moyens de -eommutatiori (122) si la charge de là batterie haute tension (120) est inférieure à un deuxième seuil. 8. Control method according to claim 5, according to which the connection of the switching means (122) is prohibited if the charge of the high voltage battery (120) is less than a second threshold.
EP13758928.9A 2012-09-20 2013-07-31 System and method for electrical vehicle supply Withdrawn EP2898585A2 (en)

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FR1258840A FR2995736B1 (en) 2012-09-20 2012-09-20 POWER SYSTEM AND METHOD FOR AN ELECTRIC VEHICLE
PCT/FR2013/051853 WO2014057181A2 (en) 2012-09-20 2013-07-31 Power supply system and method for an electric vehicle

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WO2014044936A3 (en) 2014-06-12
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US20150251559A1 (en) 2015-09-10
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US9827869B2 (en) 2017-11-28
FR2995736A1 (en) 2014-03-21

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