Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
  • H02J7/865—Battery or charger load switching, e.g. concurrent charging and load supply
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
  • H02J7/875—Charging or discharging for charge maintenance, battery initiation or rejuvenation
• • 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
  • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
• • 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
  • B60L53/30—Constructional details of charging stations
  • B60L53/31—Charging columns specially adapted for electric 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
  • 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
  • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• • 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
  • B60L58/21—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 the same nominal voltage
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
  • H02J7/02—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from AC mains by converters
  • H02J7/04—Regulation of charging current or voltage
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
  • H02J7/90—Regulation of charging or discharging current or 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
  • B60L2240/547—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
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/90—Vehicles comprising electric prime movers
  • B60Y2200/91—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
  • 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
  • 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

Definitions

• the present invention relates to a method and a device for regulating the charge level of a traction battery of an electric vehicle. It applies in particular, but not exclusively, to the field of charge level management of lithium-ion (Li-ion) batteries for electric and rechargeable hybrid vehicles.
• Li-ion lithium-ion
• Patent document FR2992779 discloses a method for regulating the charge level of a traction battery of an electric vehicle connected to an electricity distribution network by means of a charger bidirectional, maximizing the life of the batteries.
• the method described in this document is based on the principle of limiting the time spent by a battery at excessively high charge levels when it is not in use.
• This method thus comprises, firstly, a step of discharging the battery in the network through the bidirectional charger, up to an optimum level of charge making it possible to minimize the loss of the capacity of the battery as a function of a duration estimated during which the battery will not be used, then a step of charging the battery to a payload level on a route known in advance.
• an object of the present invention is to propose a method and a device, simple to implement, making it possible to alleviate, at least in part, the problem of the loss of capacity generated by the implementation of rapid charge cycles.
• Li-ion batteries especially those used as traction batteries for electric vehicles.
• the invention relates to a method for regulating the charge level of a traction battery of an electric vehicle connected to an electricity distribution network by means of a charger during a phase of non-use. of the vehicle, characterized in that it comprises:
• a first stage of forced discharge of the battery carried out in a discharge circuit associated with the battery, with a discharge current calibrated in intensity with respect to the nominal capacity of the battery, so as to discharge the battery slowly and completely up to at its minimum voltage
• a normal battery charging step with a set charge current prescribed by the charger or the battery, so as to charge the battery up to a useful charge level of the battery.
• said step of normal charging of the battery is preceded by at least one intermediate sequence of charging and discharging of the battery, successively comprising:
• a bridled battery charging step with a bridled charging current, lower than the set charging current, so as to slowly charge the battery to its maximum voltage
• the first and second stages of forced discharge of the battery are carried out in a discharge resistance, said discharge resistance being connected to the terminals of the battery during said first and second stages of forced discharge and disconnected from the battery terminals during said normal and restrained charge steps, said discharge resistance fixing said calibrated discharge current.
• said calibrated discharge current is at most equal to one tenth of the value of the nominal capacity of the battery.
• said clamped charge current is at most equal to one tenth of the value of the nominal capacity of the battery.
• said set charge current is adapted to rapid charging of the battery.
• the invention also relates to a device for regulating the charge level of a traction battery of an electric vehicle connected to an electricity distribution network by means of a charger during a phase of non-use of the vehicle, characterized in that it comprises a battery discharge circuit capable of being electrically connected to said battery and a control module adapted to selectively connect said discharge circuit to said battery to discharge said battery and to implement the process as described above.
• the discharge circuit comprises a discharge resistor, each terminal of which is connected to the respective terminals of the battery by means of a switch comprising a movable contact controlled by said control module between two positions, for connection and disconnection of the resistance terminals to the battery terminals.
• the discharge resistance is integrated into a tank of said battery.
• the invention also relates to an electric vehicle comprising a device as described above.
• FIG. 1 illustrates an electrical diagram of an example of an electric vehicle provided with a device for regulating the level of charge of the battery according to the invention
• FIG. 2 is a block diagram illustrating two embodiments of the method of the invention.
• FIG. 1 is a representation of an electrical diagram of an exemplary implementation of the invention in an electric motor vehicle 1, provided with an electric motor (not shown).
• the electric motor of the vehicle according to this example is powered by a traction battery 2, of the lithium-ion type, comprising in a manner known per se a battery tray 21 in which is arranged in series a plurality of electrochemical accumulators 22, or cells , including a rechargeable electrochemical system intended to supply a nominal voltage.
• the vehicle in this example also includes a battery charger 3.
• the battery charger 3 is intended to be connected to an electricity distribution network 31 for recharging the vehicle battery.
• the battery charger 3 is controlled by a control module 4, comprising a computer adapted to control the recharging of the battery 2 by the electrical network 31 via the charger 3, when the vehicle is stopped and connected to the network 31 for recharging.
• the invention proposes the implementation of a protocol making it possible to be able to recover part of the capacity of the lost battery. , in particular at the end of the rapid charge phases previously experienced by the battery.
• a principle of the invention is to provide a simple device associated with a specific protocol for recovering a momentarily lost reversible part of the battery capacity linked to this phenomenon and thus increasing the life of the electric vehicle, despite the in rapid charge.
• the device of the invention comprises a discharge circuit 5 associated with the battery 2.
• This discharge circuit comprises a single discharge resistor 51, which can therefore be easily integrated into the battery tray 21 where the cells 22 are arranged. More specifically, a terminal 51 a of the discharge resistance 51 is connected to the positive terminal of the battery 2 via a movable contact 52 of a first switch 54 such as a relay and the other terminal 51b of the discharge resistor 51 is connected to the negative terminal of the battery via a movable contact 52 of a second switch 54 such as a relay.
• the movable contact 52 of the first and second switches 54 can take two positions, respectively a first so-called open position, in which the terminals 51 a and 51 b of the discharge resistor 51 are not connected to the positive and negative terminals of the battery, as illustrated in FIG. 1, and a second, so-called closed, position in which the terminals 51 a and 51 b of the discharge resistance 51 are connected to the positive and negative terminals of the battery.
• the first and second switches 54 of the discharge system associated with the battery are controlled in position by the control module 4, which is adapted to determine the position of their movable contact 52 among the first and second positions, according to different strategies of charge that the present invention can offer the driver when the vehicle is stationary and connected to the network for recharging, as will be described in more detail below.
• the method of the invention makes it possible to decline at least two strategies, referenced Mode_1 and Mode_2 in FIG. 2, making it possible to recover the reversible part of the battery capacity, which has been lost in particular at the end of rapid charging phases drums.
• a forced discharge of the battery is commanded.
• the discharge resistance 51 is connected between the terminals of the battery, by controlling the two movable contacts 52 of the relays 54 in the closed position, via the control module 4.
• the discharge resistance 51 thus connected to the battery, makes it possible to fix the effective discharge current during the discharge step E1.
• the discharge resistance is sized to allow only a very low discharge current to flow, capable of slowly discharging the battery to its minimum voltage.
• the discharge resistance 51 is dimensioned so as to adjust the intensity of the discharge current to at most one tenth of the nominal capacity of the battery.
• this first step E1 of slow and total discharge of the battery makes it possible to restore part of the capacity of the battery, by making reversible in part the phenomenon of "Li plating" occurring during charging, which is a source significant degradation of the batteries, and which is favored at high current when using fast charge.
• the minimum or stop voltage determines the total discharge threshold of the battery and protects the battery.
• the control module 4 detects the minimum voltage, thanks to voltage sensors arranged at the terminals of the cells forming the battery, it disconnects the discharge resistance 51 of the battery by controlling the two movable contacts 52 of the relays 54 in the open position, which avoids over-discharging the battery and harmful consequences on the life of the battery.
• the method of the invention can be continued in two different sequences, corresponding to the two strategies referenced Mode_1 and Mode_2 in FIG. 2, corresponding respectively to a first so-called fast mode and a second so-called slow mode.
• a step E2 of normal battery charge is controlled via the charger 3 connected to the electricity distribution network. During this stage, the resistance of discharge 51 is therefore disconnected from the battery, as explained above.
• This normal charging step is carried out with a set charging current, which is that prescribed by the charger or the battery. In other words, the normal charge is a charge at a power level limited by the possibility of the charger or the battery.
• the normal charging step E2 can also be carried out according to a rapid charging regime, if it is available, in other words if a large recharging power can be obtained through the network and the charger.
• the set charge current is fixed at a value such that it allows rapid charging of the battery, capable of charging the battery so as to obtain an acceptable charge level as soon as possible.
• this charging current could be set to at least 40% of the battery capacity.
• the battery is recharged up to a useful charge level, corresponding for example to a minimum charge level necessary to make a known journey.
• the battery can be recharged immediately after the first step E1 of slow discharge, up to the payload level, including under a rapid charge regime and this, without this being to the detriment the battery life. Indeed, during a next phase of recharging the vehicle, the application according to the invention of the prior step E1 of slow discharge of the battery will make it possible to restore part of the lost capacity of the battery, as explained above.
• the process of the invention can be continued according to a second mode, called slow.
• step E2 of normal charging of the battery as described above is preceded by an intermediate sequence of charging and discharging of the battery.
• a step E12 of charged battery charging is controlled.
• the discharge resistance 51 is therefore also disconnected from the battery, according to the principles set out above, as for the normal charging step E2.
• This step E12 of bridled charge is however carried out with a bridled charge current, lower than the set charge current corresponding to the maximum charge current prescribed by the charger or the battery, so as to slowly charge the battery until its voltage maximum.
• the control module 4 adjusts the intensity of the charging current to a level at most equal to one tenth of the nominal capacity of the battery. We speak of a load flanged at 0.1 C.
• the battery in this step E12 of flanged charge, will receive a current of an intensity ten times lower than the capacity of the battery for a period of time of 10 hours.
• the battery will charge slowly and completely to its maximum voltage for a period of time of 10 hours.
• the control module 4 detects the maximum voltage, the slow charge is stopped.
• a second step E12 of forced discharge of the battery is then controlled, under operating conditions identical to the first step of discharging E1. Also, the discharge resistor 51 is again connected to the battery, so as to cause a slow and total discharge of the battery at 0.1 C, until reaching the minimum voltage of the battery.
• step E12 At the end of this second slow and total discharge of the battery implemented in step E12, the discharge resistance 51 is disconnected from the battery and the step E2 of normal charging of the battery is implemented as explained previously with reference to the fast mode Mode_1.
• the charge is ensured up to the useful charge level at a power level limited by the possibilities of the charger or the battery, possibly according to a rapid charge regime, if it is available.
• the slow mode Mode_2 produces the same beneficial effects as the fast mode Mode_1 in terms of at least partial reversibility of the phenomenon of "Li plating", thanks to the first step E1 of slow and total discharge of the battery, which is implemented in the two modes.
• the sequence intermediate which follows step E1, consisting of step E11 of slow and total charge of the battery, followed by step E12 of slow and total discharge of the battery will make it possible to re-homogenize the internal state of charge Li-ion cells in the battery, which avoids over-stressing some of their active areas and therefore prematurely degrading the battery cells, to the benefit of recovering a more substantial part of the battery capacity which can be lost during fast charge phases.
• the slow mode Mode_2 is said to be slow compared to the fast mode Mode_1 because it implies an additional immobilization of the vehicle of 20 hours, according to the embodiment, due to the implementation of the intermediate sequence of slow charging and discharging steps E11 and E12 at 0.1 C between steps E1 and E2. Also, the fast mode can in particular be useful in the event of charging through charging stations deployed in public space, where the charging and / or parking time may be limited.
• This time required for the implementation of one or the other of the two modes will also depend on the state of charge of the vehicle.
• the driver can also choose not to recharge the battery according to one or the other of the two modes of the invention allowing the recovery of the battery capacity, if the time necessary for the implementation of these two modes n 'is not compatible with the driver's constraints. In which case, a standard charge is implemented.

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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)
• Charge And Discharge Circuits For Batteries Or The Like (AREA)
• Secondary Cells (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2018
  • 2018-10-09 FR FR1859336A patent/FR3087057B1/fr active Active
• 2019
  • 2019-10-04 US US17/283,741 patent/US20210384750A1/en not_active Abandoned
  • 2019-10-04 KR KR1020217013738A patent/KR102575558B1/ko active Active
  • 2019-10-04 WO PCT/EP2019/076957 patent/WO2020074397A1/fr not_active Ceased
  • 2019-10-04 JP JP2021518077A patent/JP7183409B2/ja active Active
  • 2019-10-04 EP EP19779918.2A patent/EP3864735A1/de active Pending
  • 2019-10-04 CN CN201980065959.4A patent/CN112805898B/zh active Active
• 2024
  • 2024-03-14 US US18/605,421 patent/US20240222992A1/en active Pending

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