ENERGY STORE FOR A PHOTOVOLTAIC SYSTEM, ENERGY STORAGE POWER PLANT, CONTROL DEVICE, AND METHOD FOR OPERATING AN ENERGY STORE

• US 20140021783A1
• Filed: 07/15/2013
• Published: 01/23/2014
• Est. Priority Date: 07/19/2012
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: BELSCHNER, Werner
• Granted Patent: US 9,954,360 B2
• Time in Patent Office: Days
• US Class Current: 307/18
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/06 Lead-acid accumulators semi-lead accumulators H01M10/20
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/465 with solar battery as charging system
• CPC Class Codes: H01M 2220/10 Batteries in stationary systems, e.g. emergency power source in plant
• CPC Class Codes: H02J 1/14 Balancing the load in a network
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/466 Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin

Abstract

An energy store for a photovoltaic system has: a first capacity range which is provided for feeding into the power grid; a second capacity range which is provided for internal consumption and feeding into the power grid; and a third capacity range which is provided for feeding into the power grid.

Claims

1. An energy store for a photovoltaic system, comprising:

a first capacity range which is provided for feeding into a power grid;

a second capacity range which is provided for internal consumption and feeding into the power grid; and

a third capacity range which is provided for feeding into the power grid.

2. The energy store as recited in claim 1, further comprising:

a fourth capacity range, which is blocked; and

a fifth capacity range, which is blocked.

3. The energy store as recited in claim 2, further comprising:

a control device configured to adjust an actual state of charge of the energy store in such a way that one of a predefined positive energy quantity or a predefined negative energy quantity for feeding into the power grid is provided by the energy store for a predefined time window at a predefined time.

4. The energy store as recited in claim 3, wherein the control device is configured to adjust the actual state of charge of the energy store by taking into account at least one of (i) past load curves of internal consumption and (ii) a yield projection of the photovoltaic system.

5. The energy store as recited in claim 4, wherein at least one of:

(i) the first capacity range is 10% to 40% of the capacity of the energy store;

(ii) the second capacity range is 40% to 80% of the capacity of the energy store; and

(iii) the third capacity range is 80% to 90% of the capacity of the energy store.

6. The energy store as recited in claim 5, wherein the energy store is an electrical accumulator in the form of one of a lead accumulator or a lithium-ion accumulator.

7. An energy storage power plant, comprising:

multiple energy stores, wherein each energy store has (i) a first capacity range which is provided for feeding into a power grid, (ii) a second capacity range which is provided for internal consumption and feeding into the power grid, and (iii) a third capacity range which is provided for feeding into the power grid; and

a central control device, wherein the multiple energy stores are coupled to the central control device, and wherein the central control device is configured to set one of a predefined positive energy quantity or a predefined negative energy quantity for feeding into the power grid for a predefined time window at a specific time for at least one of the energy stores.

8. A method for operating an energy store having a first capacity range which is provided for feeding into a power grid, a second capacity range which is provided for internal consumption and feeding into the power grid, and a third capacity range which is provided for feeding into the power grid, the method comprising:

measuring an actual state of charge of the energy store;

setting one of a predefined positive energy quantity or a predefined negative energy quantity for feeding into the power grid for a predefined time window at a predefined time; and

adjusting the actual state of charge of the energy store by using the first, second and third capacity ranges of the energy store at the predefined time in such a way that the one of the predefined positive energy quantity or the predefined negative energy quantity for feeding into the power grid is provided by the energy store for the predefined time window at the predefined time.