MOBILE ENERGY STORAGE MODULE

• US 20150318702A1
• Filed: 09/10/2013
• Published: 11/05/2015
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Enrichment Technology Company Limited
• Original Assignee: Enrichment Technology Company Limited
• Inventors: Treppmann, Ing. Christoph, Schfer, Christoph, vor dem Esche, Ing. Rainer, Bumer, Thomas, Sonnen, Dipl.Ing. Michael, Middendorf, Christian
• Granted Patent: US 9,812,865 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 3/30 using dynamo-electric machines coupled to flywheels
• CPC Class Codes: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

A mobile energy storage module is provided having a high energy storage capacity and output. An energy storage system having such energy storage modules and to a method for adjusting the energy storage system to the demands in the power supply grids is also disclosed. To achieve this, the mobile energy storage module comprises an enclosing module housing having at least one power connection interface and at least one data interface, and additionally comprises a flywheel module having a plurality of flywheel energy storage units, a vacuum module for generating a minimum vacuum required for operating the flywheel module, a cooling module for removing at least internal thermal loads during operation of the flywheel module, and a module control system that is configured to appropriately control the modules in the module housing.

Claims

1. A mobile energy storage module (1) with an enclosing module housing (2), comprising at least one power connection interface (21a, 21b, 21c) and at least one data interface (22a, 22b, 22c), wherein the energy storage module (1) in the module housing (2) additionally comprises a flywheel module (3) having a plurality of flywheel energy storage units (31) which are connected to the at least one power connection interface (21a, 21b, 21c) via a DC link (32) to provide a common module storage capacity (MSK) and module output (ML), a vacuum module (4) for generating a minimum vacuum in the respective flywheel energy storage units (31) required for operating the flywheel module (3), and a module control system (6) that is configured to appropriately control the modules (3, 4, 5, . . . ) in the module housing (2), such as at least the flywheel module (3) and the vacuum module (4), and to implement data communication via the data interface (22a, 22b, 22c) for carrying out control and system tasks (ORS, NORS) in power supply grids (LS, NS), wherein the one or more power connection interfaces (21a, 21b, 21c) is/are at least provided for connection to a local and/or non-local power supply grid (LS, NS), wherein the one or more data interfaces (22a, 22b, 22c) is/are provided for receiving (EM) as external data (ED) at least the control and system tasks (ORS, NORS) to be carried out in the connected power supply grids (LS, NS) and for sending operating data (BD) to the outside, and wherein the module housing (2) is configured in a suitable manner to ensure safe transport of the modules (3, 4, 5, . . . ) disposed therein and absorb static and dynamic loads of the flywheel energy storage units (31) during operation.

2. The energy storage module (1) according to claim 1,

characterized in that

the module housing (2) is designed in a windproof and watertight manner at least on all sides and has an insulation layer (23) on all sides that is adapted to maintain a controlled indoor temperature in the module housing (2), the insulation layer (23) being preferably arranged on the module housing (2) inside or in the module housing (2).

3. The energy storage module (1) according to claim 1 or 2,

characterized in that

the module housing (2) is a standardized container, preferably an ISO container.

4. The energy storage module (1) according to any one of claim 2 or 3,

characterized in that

the module housing (2) comprises on a bottom side (2U) or on one or more of its side surfaces (2S) ground fixing means (24) for safe reversible anchorage of the energy storage module (1) to the ground (B).

5. The energy storage module (1) according to any one of the preceding claims,

characterized in that

the flywheel module (3) comprises a common frame (33) to which the flywheel energy storage units (31) are mounted and fitted, wherein the frame (33) is configured such that the flywheel module (3) as a whole can be inserted into and removed from the module housing (2).

6. The energy storage module (1) according to claim 5,

characterized in that

the flywheel energy storage units (31) are mounted to the frame (33) of the flywheel module (3) such that the mechanical energy of an individual flywheel energy storage unit (31) can be discharged into the anchorages (24) through structural components disposed in the frame (33) in the event of an extraordinary failure such that neighboring flywheel energy storage units (31) cannot be affected during operation and the energy storage module (1) is secured by the ground (B).

7. The energy storage module (1) according to any one of the preceding claims,

characterized in that

the DC link (32) is configured as a common DC bus (32) that is connected to a power converter (34) or forward converter (34).

8. The energy storage module (1) according to any one of the preceding claims,

characterized in that

the number of flywheel energy storage units (31) is adapted to provide a module storage capacity (MSK) for the energy storage module (1) which at least suffices to be able to release current into a non-local power supply grid (NS) within a time period of more than 30 s.

9. The energy storage module (1) according to any one of the preceding claims,

characterized in that

the vacuum module (4) comprises a common vacuum pump stage (41) for generating an operating vacuum and a pipe system (42) to which the flywheel energy storage units (31) are connected.

10. The energy storage module (1) according to any one of the preceding claims,

characterized in that

the energy storage module (1) furthermore comprises a heating and/or cooling module (5) for removing at least internal thermal loads or for conditioning the air during operation of the flywheel module (3).

11. The energy storage module (1) according to any one of the preceding claims,

characterized in that

the module control system (6) is provided to carry out localized control and system tasks (ORS) in one or more connected local power supply grids (LS) and/or non-localized control and system tasks (NORS) in a connected non-localized power supply grid (NS) and, to achieve this, instructs at least the storage module (3) to absorb (En) or release (Ep) energy via the one or more power connection interfaces (21a, 21 b) and distributes a corresponding energy flow (EF) to the local and/or non-local power supply grids (LS, NS) by means of a regulating unit (7) in an appropriate manner.

12. An energy storage system (10) having more than one energy storage modules (1) according to claim 1, wherein the energy storage systems (10) are connected to each other by means of a common data network (8) at least via the data interfaces (22a, 22b, 22c) and the respective module control systems (6) are configured for common control (GS) of the energy storage system (10) in order to provide a common system storage capacity (ASK) and system output (AL) from the sum total of all module storage capacities (MSK) and module outputs (ML) in the power supply grids (LS, NS) connected to the energy storage system (10).

13. The energy storage system (10) according to claim 12,

characterized in that

the power connection interfaces (21a, 21b, 21c) of all energy storage modules (1, 1′

, 1″

) are connected in a common connection point (9) for connection to a non-local power supply grid (NS) and at least one local power supply grid (LS).

14. The energy storage system (10) according to claim 12 or 13,

characterized in that

one of the module control systems (6) is provided as master control system (6M) and the other module control systems (6) are provided as slave control systems (6S), wherein the master module system (6M) is provided to transmit to the slave control systems (6S) via the data network (8) instructions for controlling the flywheel energy storage units (31) for jointly carrying out the control and system tasks (ORS, NORS) to be carried out in the connected power supply grids (LS, NS).

15. A method for providing localized and non-localized energy for control and system tasks (ORS, NORS) in a variable manner, comprising the following steps:

determining (BS) the system storage capacity (ASK) and system output (AL) required for carrying out (AO, ANO) the desired control and system tasks (ORS, NORS) in the particular power supply grids (LS, NS) to be connected;

setting up (AF) a number of energy storage modules (1, 1′

, 1′

)′

according to claim 1 having respective module storage capacities (MSK), module outputs (ML) and module control systems (6) at an installation site, wherein the number of energy storage modules (1, 1′

, 1″

) is selected such that the sum total of all module storage capacities (MSK) and module outputs (ML) corresponds to the required system storage capacity (ASK) and system output (AL);

anchoring (VA) the module housings (2) of the energy storage modules (1, 1′

, 1″

) to the ground (B) at the installation site;

connecting (ASM) the energy storage modules (1, 1′

, 1″

) in a common connection point (9), connecting (ASS) the connection point (9) to the respective power supply grids (LS, NS) and connecting (VB) the energy storage modules (1, 1′

, 1″

) to each other by means of a common data network (8) to form a common energy storage system (10);

jointly controlling (GS) the energy storage system via the respective module control systems (6), preferably by means of a selected master control system (6;

), for providing a common system storage capacity (ASK) and system output (AL) in the connected power supply grids (LS, NS) for the control and system tasks (ORS, NORS) to be carried out (AO, ANO) therein; and

adjusting (AP) the energy storage system (10) to a changed demand for system storage capacity (ASK) and system output (AL) by adding (H) further energy storage modules (1′

″

) according to claim 1 by following the aforementioned method steps or by removing (E) one or more energy storage modules (1″

) from the energy storage system (10) after all power connections (21a, 21b, 21c) for the particular energy storage module (1″

) to be removed have been disconnected from the connection point (9), all data interfaces (22a, 22b, 22c) have been disconnected from the data network (8) and the module housing (2) has been detached from the installation site.