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
  • 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]
  • B60L58/14—Preventing excessive discharging
• • 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
  • B60L53/20—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 converters located in the vehicle
• • 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
  • 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
  • B60L2240/80—Time limits

Definitions

• the technical context of the present invention is that of the electrical management of a motor vehicle of the electric or hybrid type. More particularly, the invention relates to the energy management of several computers of the motor vehicle during or following the electric charging of said motor vehicle via a charging station. In particular, the invention relates to a method for controlling the control unit of a voltage converter.
• the electric charge of the high voltage electric battery is supervised by the voltage converter control unit which makes it possible to electrically adapt the electric power supply network to a high voltage electric network of the electrified motor vehicle.
• the object of the present invention is to propose a new piloting method in order to respond at least in large part to the previous problems and to also lead to other advantages.
• Another object of the invention is to improve the reliability of the safety electric charging of an electrified motor vehicle.
• Another object of the invention is to optimize the management of the high voltage electric battery of such an electrified motor vehicle.
• At least one of the aforementioned objectives is achieved with a method for controlling a control unit of a voltage converter for an electrified motor vehicle, the control method comprising a step of prohibiting the awakening of computers of the electrified motor vehicle, the step of prohibiting awakening being implemented by the control unit of the voltage converter, if the following non-waking conditions are cumulatively verified:
• a charge level of the high voltage electric battery is greater than or equal to a threshold level.
• the voltage converter control unit is known as OBCDC. It involves :
• [13] - a first part configured to allow the charging of the high voltage electric battery, in particular ensuring communication with charging terminals and monitoring the electric charging of the high voltage electric battery; and [14] - a second part taking the form of a DC/DC converter making it possible to convert an electric current conveyed to the high voltage electric battery.
• the DC/DC voltage converter converts the 220V alternating current into direct current towards the high voltage electric battery.
• the DC/DC converter converts part of the current from the high voltage electric battery to supply the on-board network of the motor vehicle in order to recharge a low voltage electric battery of the motor vehicle.
• the high voltage electric battery is the traction battery of the electrified motor vehicle.
• the high-voltage electric battery is of the type of a lithium-ion battery.
• the service electric battery known as low voltage, is the electric battery that powers a low voltage electrical network of the electrified motor vehicle. It is in particular this electric service battery which is electrically connected to the computers, control units and, in general, to the various electrical components of the electrified motor vehicle in order to polarize them to allow their correct operation.
• the charge level and the threshold level of the high-voltage electric battery are understood as a relative value with respect to a maximum level of charge of the electric battery for which said high-voltage electric battery voltage is fully charged and thus stores maximum electrical energy compared to storage capacities of the high voltage electrical battery.
• the charge level and the threshold level of the high voltage electric battery are set in percentage. When the high voltage electric battery is fully charged, then its charge level is 100%. When the high voltage electric battery is fully discharged, its charge level is at 0%.
• the computers subject to the wake-up ban controlled by the converter control unit are the computers of the electrified motor vehicle which are linked to the voltage converter control unit. More particularly, by "linked”, it is understood that it is the computers of the electrified self-propelled vehicle which intervene when recharging the high voltage electric battery.
• the computers linked to the voltage converter control unit include a BSI - acronym for Intelligent Service Box, and/or a powertrain supervision unit and/or a high electric battery supervision computer tension.
• the computers linked to the voltage converter control unit are those implemented for or via the control of the high voltage electric battery.
• these electrical components are electrically connected to the electric service battery in order to be able to operate.
• the computers are woken up by the voltage converter control unit if the waking conditions are verified.
• the voltage converter control unit is authorized to wake up the computers linked to it if the wake-up conditions are verified.
• the voltage converter control unit controls a power supply in such a way that the computers are polarized - for example via the electric service battery - and become active, i.e. functional.
• the voltage converter control unit controls the electric service battery so as to allow it to achieve such polarization, for example by controlling a switch which makes it possible to electrically couple the electric service battery to the aforementioned computers.
• a computer is woken up if it sends data to a communication network or to other computers or to the voltage converter control unit.
• the control unit of the voltage converter drives a power supply in such a way that the computers are not polarized - for example via the electric service battery - and become inactive, that is to say non-functional.
• the voltage converter control unit controls the electrical service battery so as to prevent their electrical polarization, for example by controlling a switch which makes it possible to electrically decouple the electrical service battery from the aforementioned computers.
• wake-up authorization it is understood that, if such authorization is granted to the voltage converter control unit, said voltage converter control unit is configured to be able - in the wake of the authorization or subsequently - allow the computers to be electrically polarized by the electric service battery in order to operate. In the context of the invention, it is indeed the voltage converter control unit which verifies the conditions in order to be able itself - in the wake of the wake-up authorization or subsequently - to electrically bias the computers in order to operate .
• control method in accordance with the first aspect of the invention is more particularly implemented when charging the high voltage electric battery of the electrified motor vehicle by a charging station, or subsequently thereto, and even more particularly when the charging terminal is still electrically coupled to the control unit of the voltage converter.
• the control method in accordance with the first aspect of the invention is implemented on or for an electric or hybrid motor vehicle, such motor vehicles comprising a high voltage electric battery, called a traction battery, configured to allow powering electrically at least one electric motor used to move said motor vehicles.
• the piloting method in accordance with the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:
• the threshold level of the high voltage electric battery is equal to 92%
• the waking up prohibition is granted to the voltage converter control unit if the following additional non-waking up condition is verified: an electrical voltage taken from the terminals of a low voltage network of the electrified motor vehicle is less than or equal to a threshold voltage;
• the threshold voltage of the low voltage network is equal to 12.3 V.
• the threshold voltage of the low voltage network is predetermined according to a value defined in the factory or according to initialization parameters of the process of piloting according to the invention;
• the integration time is between 10 seconds and 60 seconds.
• the integration time is equal to 30 seconds;
• the step of prohibiting the waking up of the computers by the voltage converter control unit comprises a step of setting a non-waking up authorization variable during which the wake-up is configured in a so-called inactive state for which the voltage converter control unit is configured not to wake up the computers.
• the control unit of the voltage converter controls a low-voltage electrical network of the electrified motor vehicle and/or the electrical service battery of way to electrically decouple the computers in order to make them non-functional;
• the wake-up authorization variable is configured in a so-called active state for which the voltage converter control unit is configured to be able to wake up the computers if at least one of the following wake-up conditions is fulfilled: (i) if the voltage converter control unit and a charging station of the high-voltage electric battery are electrically decoupled, or (ii) if the computers are waked up .
• the voltage converter control unit is authorized to electrically polarize the computers in order to make them functional: the computers are functional when the variable d wake-up authorization is in its active state. In other words, they are electrically polarized by the electric service battery;
• the wake-up authorization variable is advantageously a Boolean variable that can take either the active state associated with a first Boolean value, or the inactive state associated with a second Boolean value different from the first Boolean value;
• control process includes a step of recording the wake-up authorization variable in a memory of the voltage converter control unit.
• the subject of the invention is a control unit for a voltage converter of a high-voltage electric battery of an electrified motor vehicle, the control unit being configured to implement the method of piloting in accordance with the first aspect of the invention or according to any one of its improvements.
• the invention also extends to an electrified motor vehicle comprising:
• a powertrain comprising a high voltage electric battery, called traction, a voltage converter configured to be able to recharge the high voltage electric battery from a charging station electrical via an electrical power supply network and/or from regenerative braking of the electrified motor vehicle;
• the electrified motor vehicle is of the type of an electric or hybrid vehicle, the rechargeable high voltage electric battery being of the type of a high voltage electric battery configured to supply high voltage electric power to a traction chain of the vehicle automobile.
• FIG.1 schematically illustrates a motor vehicle according to the third aspect of the invention
• FIG.2 illustrates a synoptic view of the control method according to the first aspect of the invention.
• the invention applies to electrified vehicles, in particular plug-in, hybrid and electric motor vehicles.
• FIGURE 1 illustrates an embodiment of an electrified motor vehicle 1 electrified capable of implementing the steering method 9 according to the invention.
• the electrified motor vehicle 1 comprises a powertrain provided with a powertrain supervision unit 2, an electric traction machine (not shown) powered by a high voltage electric battery 3 - called traction - and a control unit of a DC/DC direct current converter 4 forming a device for recharging the high voltage electric battery 3.
• the high voltage electric battery 3 generally provides several hundred volts, for example 450V, in order to ensure the supply of electric energy to a traction chain of the electrified motor vehicle 1.
• the high voltage electric battery 3 comprises several electric cells, for example of the Lithium-ion type.
• the high voltage electric battery 3 collaborates with a high voltage battery management computer.
• the voltage converter control unit 4 comprises:
• [54] - charging means cooperating with a power outlet 6 so as to be able to electrically connect an external charging terminal 7 connected to a power supply network 8.
• the control unit of the voltage converter 4 is in charge of managing communication between different types of charging stations and monitoring and controlling electric charging on one of them;
• [55] - an alternating/direct AC/DC and direct/direct DC/DC electrical converter.
• a first function is to convert an alternating voltage delivered by the charging terminal 7 into a direct voltage compatible with the high voltage electric battery 3.
• a second function is to convert electric voltages for supplying an electric service battery (12V) and on-board systems of the electrified motor vehicle 1 such as for example the low voltage on-board network - approximately 14V - and for the electric traction machine, when driving and when braking recuperative.
• the voltage converter control unit 4 communicates with various computers of the motor vehicle, and in particular with the powertrain group supervision unit 2 via a communication network 5 on which the powertrain group supervision unit powertrain 2 transmits environmental data from the electrified motor vehicle 1.
• the voltage converter control unit 4 is equipped with an integrated circuit computer and electronic memories.
• the voltage converter control unit 4 according to the second aspect of the invention is configured to implement the triggering method according to the first aspect of the invention
• the computer can be external to the voltage converter control unit 4, while being coupled to the latter. In the latter case, it can itself be arranged in the form of a dedicated computer comprising for example a possible dedicated program. Consequently, the control unit, according to the invention, can be produced in the form of software or computer modules, or else of electronic circuits, or even of a combination of electronic circuits and software modules.
• FIGURE 2 illustrates an exemplary embodiment of the method 9 for controlling a control unit of the voltage converter 4 for an electrified motor vehicle 1, the control method 9 comprising a step 95 for prohibiting the waking up of the computers of the electrified motor vehicle 1 linked to the control unit of the voltage converter 4 if non-awakening conditions are cumulatively verified among the following:
• the computers which are awake that is to say electrically polarized so as to be able to be activated and/or transmit data on the communication network 5 of the electrified motor vehicle 1 include those which are directly or indirectly linked to the powertrain of the electrified motor vehicle, such as for example a BSI - acronym for Intelligent Servitude Box, a powertrain supervision unit or a supervision computer for the high voltage electric battery.
• the computers which are asleep or not awake, that is to say electrically decoupled from the electric service battery so as not to be able to be activated and/or transmit data on the communication network 5 of the electrified motor vehicle 1 include those which are linked directly or indirectly to the powertrain of the electrified motor vehicle, such as for example a BSI - acronym for Intelligent Servitude Box, a powertrain supervision unit or a computer supervision of the high voltage electric battery.
• a third additional non-wake-up condition 93 is taken into account, cumulatively with the two previous ones, to provide the wake-up prohibition to the control unit of the voltage converter 4: an electrical voltage taken from the terminals of a low voltage network of the electrified motor vehicle 1 is less than or equal to a threshold voltage.
• the voltage converter control unit 4 tests these non-awakening conditions during a comparison step 94 carried out according to a given comparison frequency.
• the threshold level of the high voltage electric battery 3 and the threshold voltage of the low voltage network beyond which the prohibition for the control unit of the converter of voltage 4 to wake up the computers of the electrified motor vehicle is granted are predetermined and/or configurable.
• the threshold voltage of the low voltage network is equal to 12.3 V
• the threshold level of the high voltage electric battery is equal to 92%.
• the voltage converter control unit 4 tests the verification of these non-awakening conditions during an integration period predetermined in order to avoid taking into account an aberrant value.
• the integration period is less than one minute, preferably equal to 30 seconds.
• the step of prohibiting the waking up of the computers by the control unit of the voltage converter 4 includes a setting step 96 a wake-up authorization variable during which the wake-up authorization variable is configured:
• the control method 9 also includes a step 97 of recording the wake-up authorization variable on a memory of the control unit of the voltage converter 4.
• the invention relates to a method for controlling a control unit of a voltage converter 4 making it possible to control the charge of a high voltage battery 3 of an electrified motor vehicle 1.
• a method control includes a step for checking the wake-up conditions of several computers of the electrified motor vehicle 1 in order to activate their electric polarization by the low-voltage electric battery in the event of an incomplete state of charge and an insufficient level of charge, and to prevent them from functioning otherwise.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=77710971

Family Applications (1)

Country Status (3)

Family Cites Families (5)

• 2021
  • 2021-06-22 FR FR2106599A patent/FR3124129A1/fr active Pending
• 2022
  • 2022-04-19 EP EP22722862.4A patent/EP4359249A1/de active Pending
  • 2022-04-19 WO PCT/FR2022/050731 patent/WO2022269145A1/fr active Application Filing

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