ELECTRICAL ENERGY SUPPLY UNIT AND CONTROL THEREFOR

• US 20190312455A1
• Filed: 06/15/2017
• Published: 10/10/2019
• Est. Priority Date: 06/15/2016
• Status: Active Grant

• Current Assignee: Power-Blox AG
• Original Assignee: Power-Blox AG
• Inventors: Medici, Alessandro
• Granted Patent: US 11,296,537 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• CPC Class Codes: H02J 2300/30 The power source being a fuel cell
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/388 Islanding, i.e. disconnection of local power supply from the network
• CPC Class Codes: H02J 3/40 Synchronising a generator for connection to a network or to another generator
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence
• CPC Class Codes: H04B 2203/547 via DC power distribution
• CPC Class Codes: H04B 3/548 the power on the line being DC arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The invention relates to a control for an electrical energy supply unit, comprising a first filling level input, to which a first filling level of a first energy store of the electrical energy supply unit can be transmitted. In addition, the control comprises a further filling level input, to which a further filling level of an optional further energy store of a further electrical energy supply unit can be transmitted. Furthermore, the control comprises a nominal alternating voltage determiner which is designed to determine a nominal alternating voltage while taking into account the first filling level and/or the further filling level. In addition, the control comprises a nominal alternating voltage output, from which the nominal alternating voltage can be transmitted to an alternating voltage generator of the electrical energy supply unit. An electrical energy supply unit comprises a control according to the invention, a first energy store and an alternating voltage generator having a first and a second terminal. The first terminal of the alternating voltage generator is connected to the first energy store in an electrically conductive manner. The alternating voltage generator is designed to generate at the second terminal an alternating voltage that corresponds to a nominal alternating voltage. An electrical energy supply system comprises an electrical energy supply unit according to the invention and at least one additional electrical energy supply unit according to the invention, which are connected to one another in an electrically conductive manner.

Claims

1. A controller for an electrical energy supply unit, comprising:

a) a first filling level input, to which a first filling level of a first energy store of the electrical energy supply unit is transmittable,

b) a further filling level input, to which a further filling level of an optional further energy store of a further electrical energy supply unit is transmittable,

c) a nominal alternating voltage determiner, which is designed to determine a nominal alternating voltage in consideration of the first filling level and/or of the further filling level,

d) a nominal alternating voltage output, from which the nominal alternating voltage is transmittable to an alternating voltage generator of the electrical energy supply unit.

2. The controller as claimed in claim 1, wherein the nominal alternating voltage determiner is designed to determine a nominal frequency of the nominal alternating voltage in consideration of the first filling level and/or of the further filling level, and/or the controller is designed, from a further frequency of a further alternating voltage on a further alternating voltage generator of the further electrical energy supply unit, to determine the further filling level of the further energy store.

3. The controller as claimed in claim 2, wherein the nominal alternating voltage determiner is configured such that the nominal frequency

a) essentially corresponds to the further frequency, if the further electrical energy supply unit is connected to the electrical energy supply unit in an electrically conductive manner, and

b) is otherwise essentially determined in consideration of the first filling level.

4. The controller as claimed in claim 2, wherein the nominal alternating voltage determiner is configured such that the nominal frequency

a) essentially corresponds to the further frequency, if the further electrical energy supply unit is connected to the electrical energy supply unit in an electrically conductive manner and if the further filling level exceeds the filling level, and

b) is otherwise essentially determined in consideration of the first filling level.

5. The controller as claimed in claim 2, wherein the nominal alternating voltage determiner can consider the first filling level, such that the nominal frequency consistently rises in tandem with the first filling level.

9. The controller as claimed in claim 1, additionally comprising a maximum power regulator for an electrical energy source of the electrical energy supply unit.

10. The controller as claimed in claim 2, additionally comprising:

a) an excess power input, to which an excess power of an electrical energy source is transmittable,

wherein the nominal alternating voltage determiner is additionally configured, at a first filling level of 100%, to determine the nominal frequency in relation to the excess power.

11. The controller as claimed in claim 10, wherein the nominal alternating voltage determiner can consider the first filling level such that the nominal frequency consistently rises in tandem with the excess power.

14. The controller as claimed in claim 1, wherein the nominal alternating voltage determiner is additionally designed to determine a nominal r.m.s. value of the nominal alternating voltage in relation to a filling level differential, wherein the filling level differential is calculated by the deduction of the further filling level from the first filling level.

15. The controller as claimed in claim 14, wherein the nominal alternating voltage determiner is additionally designed to regulate the nominal r.m.s. value of the nominal alternating voltage, such that the filling level differential, in the stationary state, converges towards zero.

16. The controller as claimed in claim 14, wherein the nominal alternating voltage determiner is additionally designed to determine the nominal r.m.s. value of the nominal alternating voltage, in accordance with a current output from the alternating voltage generator.

17. The controller as claimed in claim 1, wherein the nominal alternating voltage determiner is additionally configured to set the nominal alternating voltage for at least one nominal alternating voltage cycle to zero, if an overvoltage occurs within the alternating voltage generator.

18. The controller as claimed in claim 1, additionally comprising:

a) a load power input, to which a load power of a load which is connected to the electrical energy supply unit is transmittable, and

b) a generator power input, to which a generator power delivered by the alternating voltage generator of the electrical energy supply unit is transmittable,

wherein the nominal alternating voltage determiner is additionally configured to determine a nominal r.m.s. value such that;

c) the generator power is greater than the load power, if the first filling level is greater than the further filling level,

d) the generator power is smaller than the load power, if the first filling level is smaller than the further filling level,

e) the generator power is equal to the load power, if the first filling level corresponds to the further filling level.

19. The controller as claimed in claim 1, additionally comprising:

a) an interchange power input, to which an interchange power which flows from the electrical energy supply unit to the further electrical energy supply unit is transmittable, and

b) a circuit-breaker, which is designed to establish an electrically conductive connection between the electrical energy supply unit and the further electrical energy supply unit, and to interrupt the electrically conductive connection, if;

i. the interchange power is lower than zero and the first filling level is equal to or lower than a first predefined filling level threshold value,

ii. the interchange power is greater than zero and the first filling level is equal to or lower than a second predefined filling level threshold value.

28. An electrical energy supply unit, comprising

a) a controller as claimed in claim 1,

b) a first energy store;

c) an alternating voltage generator having a first terminal and a second terminal, wherein the first terminal is connected to the first energy store in an electrically conductive manner, and wherein the alternating voltage generator is designed to generate an alternating voltage which corresponds to a nominal alternating voltage on the second terminal.

36. The electrical energy supply unit as claimed in claim 28, additionally comprising a filling level detector for determining the first filling level of the first energy store, and/or additionally comprising a charging device, which, on the input side, is connectable to an electricity supply network and, on the output side, is connected to the first energy store.

39. The electrical energy supply unit as claimed of claim 28, additionally comprising an electrical energy source which is connectable to the first energy store in an electrically conductive manner.

44. The electrical energy supply unit as claimed in claim 39, additionally comprising a voltage converter, which is electrically connected on an the input side to the electrical energy source, and on an output side to the first energy store.

56. An electrical energy supply system comprising an electrical energy supply unit as claimed in claim 28 and at least one further electrical energy supply unit, wherein the electrical energy supply unit and the further electrical energy supply unit are mutually interconnected in an electrically conductive manner and wherein, the further electrical energy supply unit is an electrical energy supply unit as claimed in claim 28.

58. A method for controlling an electrical energy supply unit as claimed in claim 28, comprising the following steps:

a) determination of a nominal alternating voltage, in consideration of a first filling level of a first energy store of the electrical energy supply unit and/or of a further filling level of a further energy store of a further electrical energy supply unit),

b) transmission of the nominal alternating voltage to an alternating voltage generator of the electrical energy supply unit.

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