METHOD AND DEVICE FOR OPTIMIZED RECHARGING OF AN ELECTRIC BATTERY

• US 20140217979A1
• Filed: 09/06/2012
• Published: 08/07/2014
• Est. Priority Date: 09/07/2011
• Status: Abandoned Application

• Current Assignee: Electricitã© De France, Electricite Reseau Distribution France (Electricitã© De France)
• Original Assignee: Electricitã© De France, Electricite Reseau Distribution France (Electricitã© De France)
• Inventors: Rousselle, Melaine, Alberdi, Gaizka
• Application Number:
  US14/343,570
• Publication Number:
  US 20140217979A1
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2240/525 Temperature of converter or components thereof
• CPC Class Codes: B60L 2240/70 Interactions with external data bases, e.g. traffic centres
• CPC Class Codes: B60L 2260/58 Departure time prediction
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

A method and device for optimized recharging of the electric battery of an electrical system by an electrical recharging device, in which the electric battery is recharged during a charging time period belonging to an available charging time period initiated by the connecting of the recharging system of the electric battery to the electrical recharging device, this charging time period starting at a start of charge instant determined as a function of a charging curve associated with said electrical recharging device, of a charging limit power level and of the level of residual electrical energy contained in the electric battery upon the connecting of the electric battery charging system to the electrical recharging device.

Claims

1. A method for the optimized recharging of the electric battery of at least one electrical system by an electrical recharging device, wherein the electric battery is recharged during a charging time period that is within an available charging time period initiated by the connecting of the electric battery recharging system to the electrical recharging device, said charging time period starting at a start of charge instant determined as a function of a load curve associated with said electrical recharging device, of a load limit capacity level, and of the level of residual electrical energy contained in the electric battery when the electric battery recharging system is connected to the electrical recharging device.

2. The optimized recharging method according to claim 1, wherein the determination of the start of charge instant comprises:

calculating, for each instant among a plurality of consecutive potential start of charge instants, a potential load parameter that is dependent on the difference between the load curve and the load limit capacity level, and

selecting the start of charge instant corresponding to the potential start of charge instant associated with the load parameter of maximum value among all the calculated potential load parameters.

3. The optimized recharging method according to claim 2, wherein the calculation is an iterative calculation comprising the followings steps, for a potential start of charge instant:

calculating the potential load parameter associated with said potential instant as a function of the difference between the load curve and the load limit capacity level; and

comparing the duration of the time interval between said potential start of charge instant and the end time of the available charging time period, with the duration of the charging time period;

the iterative calculation being carried out for each instant among the plurality of consecutive potential start of charge instants, in chronological order, until the duration of the time interval between said potential start of charge instant and the end time of the available charging time period is less than the duration of the charging time period.

4. The optimized recharging method according to claim 1, wherein the determination of the start of charge instant further comprises the sampling of the load curve over the available charging time period, in order to obtain a set of n load curve power values respectively associated with n time intervals respectively starting at n consecutive potential start of charge instants;

the load parameter associated with a potential start of charge instant being equal to the sum of the respective differences, for each time interval among a plurality of consecutive time intervals starting at the potential start of charge instant, between the limit capacity level and the load curve power value associated with said time interval.

5. The optimized recharging method according to claim 4, wherein the determination further comprises the sampling of a load limit capacity curve over the available charging time period in order to obtain a set of n limit capacity level values respectively associated with the n time intervals respectively beginning at n consecutive potential start of charge instants;

the load parameter associated with a potential start of charge instant being equal to the sum of the respective differences, for each time interval among a plurality of consecutive time intervals starting at the potential start of charge instant, between the limit capacity level value and the load curve power value which are associated with said time interval.

6. The optimized recharging method according to claim 1, wherein the available charging time period is determined as a function of the moment when the electric battery recharging system is connected to the electrical recharging device and of an indication concerning the charging end time provided by the user of the electric vehicle.

7. The optimized recharging method according to claim 1, wherein the duration of the charging time period is determined as a function of the level of residual electrical energy contained in the electric battery when the electric battery recharging system is connected to the electrical recharging device.

8. The optimized recharging method according to claim 7, wherein the duration of the charging time period is equal to the difference between a charging duration corresponding to the time required to charge the electric battery to a desired level of electrical energy, and a partial charging duration corresponding to the time required to charge the electric battery to the level of residual electrical energy.

9. The optimized recharging method according to claim 8, wherein the desired level of electrical energy is the maximum charge level of the electric battery.

10. The optimized recharging method according to claim 1, comprising a prior verification of the available charging time period as a function of the duration of the charging time period the determination of the start of charge instant for the electric battery only occurring if the duration of the available charging time period is greater than the duration of the charging time period.

11. The optimized recharging method according to claim 1, wherein the electric battery belongs to a class of electric batteries having a certain level of memory effect, particularly the class of NiCd or lead-acid batteries.

12. A non-transitory computer readable storage medium, having stored thereon a computer program comprising program instructions, the computer program being loadable into a data-processing unit and adapted to cause the data-processing unit to carry out the steps of claim 1 when the computer is run by the data-processing device.

13. An optimized recharging device for recharging at least one electric vehicle, connected to an electrical grid and comprising at least one connection port suitable for connection to the electric battery of an electric vehicle, the device being configured to implement the steps of the method according to claim 1 following the connection of the electric battery of an electric vehicle to the connection port of the optimized recharging device.

14. An optimized recharging system for electrically recharging a fleet composed of at least one electric vehicle, the system comprising an electrical grid and at least one electrical recharging device according to claim 13, connected to said electrical grid.

15. The optimized recharging system according to claim 14, further comprising a remote computer system, connected to the electrical recharging device and comprising a processing unit suitable for carrying out the steps of a method for the optimized recharging of the electric battery of at least one electrical system by an electrical recharging device, wherein the electric battery is recharged during a charging time period that is within an available charging time period initiated by the connecting of the electric battery recharging system to the electrical recharging device, said charging time period starting at a start of charge instant determined as a function of a load curve associated with said electrical recharging device, of a load limit capacity level, and of the level of residual electrical energy contained in the electric battery when the electric battery recharging system is connected to the electrical recharging device.