Device and method for storing electrical energy

• US 9,260,030 B2
• Filed: 04/19/2010
• Issued: 02/16/2016
• Est. Priority Date: 04/19/2010
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Falk, Rainer, Fries, Steffen
• Primary Examiner(s): GRANT, ROBERT J
• Application Number:
  US13/642,342
• Publication Number:
  US 20130033230A1
• Time in Patent Office: 2,129 Days
• Field of Search: 320/104, 320/135
• US Class Current: 1/1
• CPC Class Codes: B60L 2200/22 Microcars, e.g. golf cars
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: H02J 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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 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 device for storing electrical energy in a vehicle includes at least one vehicle battery, which can be connected to an electrical power network by a vehicle charging interface of the vehicle. The vehicle battery has a storage capacity for storing electrical energy. The storage capacity of the vehicle battery is partitioned for different users.

Claims

1. A device to store electrical energy in a vehicle, comprising:

a vehicle battery, which can be connected via a vehicle charging interface of the vehicle to a main power network, the vehicle battery having a storage capacity for storage of electrical energy and having a plurality of energy storage cells; and

an energy management module to logically partition the storage capacity of the vehicle battery by individually addressing the energy storage cells of the vehicle battery, wherein

the storage capacity of the vehicle battery is partitioned for a plurality of different users, and

the energy management module partitions the storage capacity of the vehicle battery logically into a plurality of different user storage capacities respectively for the plurality of different users.

2. The device as claimed in claim 1, wherein the energy management module is provided between the vehicle battery and the vehicle charging interface.

3. The device as claimed in claim 1, wherein

each of the user storage capacities of the vehicle battery can be charged or discharged via the energy management module and the vehicle charging interface, independently of other user storage capacities.

4. The device as claimed in claim 1, wherein

the user storage capacities comprise a first storage capacity for storage of electrical energy for the vehicle and a second storage capacity for intermediate storage of energy for a power provider.

5. The device as claimed in claim 1, wherein

the different users are selected from the group consisting of different consumption units that consume electrical energy power within the vehicle, different drivers of the vehicle, and different power providers who intermediately store electrical energy in the vehicle battery.

6. The device as claimed in claim 1, wherein

each user storage capacity comprises:

an adjustable virtual storage capacity;

a partitioning identity; and

a charge state.

7. The device as claimed in claim 6, wherein

the energy management module monitors the charge state of each user storage capacity.

8. The device as claimed in claim 1, wherein

the vehicle charging interface connects to an electricity tapping column of a main power network to charge and discharge the user storage capacities of the vehicle battery.

9. The device as claimed in claim 8, wherein the energy management module authenticates itself to the electricity tapping column.

10. The device as claimed in claim 1, wherein

the vehicle comprises an electric motor and an engine management system,

the electrical motor is assigned a motor-user storage capacity to supply electric energy to the electrical motor, and

when the vehicle is in a travel operational mode, the engine management system draws electrical energy via the engine management module from the motor-user storage capacity.

11. The device as claimed in claim 10, wherein

during a braking procedure of the vehicle, braking energy is absorbed by the electric motor and fed back into the motor-user storage capacity.

12. An electrical energy storage system, comprising:

a plurality of vehicle storage devices, each comprising;

a vehicle battery, which can be connected via a vehicle charging interface of a vehicle to a main power network, the vehicle battery having a storage capacity for storage of electrical energy and having a plurality of energy storage cells; and

an energy management module to logically partition the storage capacity of the vehicle battery by individually addressing the energy storage cells of the vehicle battery, wherein

for each vehicle storage device, the storage capacity of the vehicle battery is partitioned for a plurality of different users,

for each vehicle storage device, the energy management module partitions the storage capacity of the vehicle battery logically into a plurality of different user storage capacities respectively for the plurality of different users,

the main power network is supplied with electrical energy by a power provider, and

the electrical energy present in the main power network can be stored by the power provider in at least some of the storage capacities of vehicle batteries.

13. A method to store electrical energy provided from a main power network by a power provider, comprising:

for each of a plurality of vehicles, partitioning storage capacity of a vehicle battery, the storage capacity being partitioned for a plurality of different users, each vehicle having an energy management module that logically partitions the storage capacity of the vehicle battery into a plurality of different user storage capacities respectively for the plurality of different users, the energy management module partitioning the storage capacity by individually addressing energy storage cells of the vehicle battery;

for each vehicle battery, assigning at least one of the energy storage capacities to the power provider; and

intermediately storing the electrical energy provided from the main power network, in user storage capacities assigned to the power provider.