Method for managing power in a charging station for electric vehicles

Patent metadata

Field	Value
Publication number	US-10040365-B2
Application number	US-201615358994-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Dec 10, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A method for managing power in a charging station for charging electric vehicles, the charging station including several charging points, the method is used to predict accurately a consumption of the charging station, with satisfaction of clients. The method includes determining a statistic model of occupation of the charging station, determining some scenarios of occupation of the charging station, take into account the statistic model, determining, for each power profile among many power profiles, some scenarios which are valid and some other scenarios which are non-valid, taking in account client satisfaction rate, selecting an optimum power profile among said many power profiles for which a number of non-valid scenarios does not exceed a predefined threshold.

First claim

The invention claimed is:

1. A method for managing power in a charging station for electric vehicles, said charging station comprising a plurality of charging terminals, said method comprising the following steps:
determining, for the charging station, a statistical occupancy model for said charging station;
determining occupancy scenarios for the charging station matching said determined statistical occupancy model;
determining a plurality of power profiles to be applied to the charging station, each power profile being sampled over a plurality of successive time intervals of a predefined time period;
applying each power profile to each identified occupancy scenario by distributing available power in each time interval of said each power profile among the electric vehicles connected to the charging station over said each time interval;
for each power profile applied to a determined occupancy scenario, comparing a satisfaction rate obtained in relation to a predefined threshold, said satisfaction rate being determined by taking into account an obtained final charging level and a duration of connection of each electric vehicle to the charging station for charging purposes, in order to determine whether the determined occupancy scenario is valid; and
selecting an optimum power profile from the plurality of power profiles for which a number of non-valid occupancy scenarios does not exceed a predefined threshold.

2. The method according to claim 1 , wherein the available power is distributed equally among all electric vehicles connected to the charging station.

3. A method according to claim 1 , wherein the available power is distributed by taking into account the duration of connection of each electric vehicle to the charging station.

4. The method according to claim 1 , wherein each power profile is defined based on a set of parameters having a determined dimension.

5. The method according to claim 1 , wherein each power profile is selected by taking into account a performance index.

6. The method according to claim 5 , wherein the performance index is linked to a minimization of a consumption prediction error.

7. The method according to claim 5 , wherein the performance index is linked to a limitation of a maximum size of each power profile.

8. A system for managing power in a charging station for electric vehicles, said charging station comprising a plurality of charging terminals, said system comprising:
a module for determining, for the charging station, a statistical occupancy model for said charging station;
a module for determining occupancy scenarios for the charging station matching said determined statistical occupancy model;
a module for determining a plurality of power profiles to be applied to the charging station, each power profile being sampled over a plurality of successive time intervals of a predefined time period;
a module for applying each power profile to each identified occupancy scenario by distributing available power in each time interval of said each power profile among the electric vehicles connected to the charging station over said time each interval;
for each power profile applied to a determined occupancy scenario, a module for comparing a satisfaction rate obtained in relation to a predefined threshold, said satisfaction rate being determined by taking into account an obtained final charging level and a duration of connection of each electric vehicle to the charging station for charging purposes, in order to determine whether the determined occupancy scenario is valid; and
a module for selecting an optimum power profile chosen from the plurality of power profiles for which a number of non-valid scenarios does not exceed a predefined threshold.

Assignees

• Schneider Electric Ind Sas

Inventors

• Pflaum Peter
• Alamir Mazen

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/90

  Regulation of charging or discharging current or voltage · CPC title

• H02J7/52

  for charge balancing, e.g. equalisation of charge between batteries · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• G06Q50/06

  Energy or water supply · CPC title