POWER TRANSMISSION AND RECEPTION CONTROL DEVICE, METHOD FOR CONTROLLING TRANSMISSION AND RECEPTION OF POWER, POWER TRANSMISSION AND RECEPTION CONTROL SYSTEM

• US 20170163051A1
• Filed: 07/08/2015
• Published: 06/08/2017
• Est. Priority Date: 07/17/2014
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Morita, Tadashi, Werth, Annette
• Granted Patent: US 10,734,819 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H02J 1/106 for load balancing, symmetrisation, or sharing
• 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: H02J 7/35 with light sensitive cells

Abstract

A method of operating a first battery server for use with a first node of a power interchange system that distributes direct current (DC) power between nodes, wherein each node of the nodes comprises a storage battery to store electrical energy and a battery server to control transmission of DC power from the storage battery of the node to one or more other nodes and to control receipt of DC power at the node from one or more storage batteries of one or more other nodes. The method comprises, in response to detecting that a state of charge of the first storage battery and/or a usage rate of power satisfies one or more conditions, requesting that a master node of the power interchange system control transmission of power from another node of the nodes to the first node, wherein the master node is one of the nodes.

Claims

1. A method of operating a first battery server for use with a first node of a power interchange system that distributes direct current (DC) power between a plurality of nodes, wherein each node of the plurality of nodes comprises a storage battery to store electrical energy and a battery server to control transmission of DC power from the storage battery of the node to one or more other nodes and to control receipt of DC power at the node from one or more storage batteries of one or more other nodes, wherein the method comprises:

monitoring a state of charge in a first storage battery of the first node and a usage rate of power by one or more electrical components of the first node; and

in response to detecting that the state of charge of the first storage battery and/or the usage rate of power satisfies one or more conditions, requesting that a master node of the power interchange system control transmission of power from another node of the plurality of nodes to the first node, wherein the master node is one of the plurality of nodes.

2. The method of claim 1, wherein detecting that the state of charge of the first storage battery and/or the usage rate of power satisfies one or more conditions comprises determining that the state of charge of the first storage battery is less than a threshold level.

3. The method of claim 1, wherein requesting that the master node control transmission of power from another node to the first node comprises, in a case that the first node is the master node, controlling transmission of power from another node to the first node.

4. The method of claim 3, further comprising operating the first battery server of the first node to, in response to detecting that the state of charge of the first storage battery and/or the usage rate of power satisfies one or more conditions, carry out acts of:

determining whether one of the plurality of nodes is currently the master node;

in response to determining that none of the plurality of nodes is currently the master node, broadcasting at least one first message to the plurality of nodes nominating the first node as the master node; and

in response to one or more messages being received at the first node from one or more nodes of the plurality of nodes other than the first node, configuring the first node to act as the master node of the power interchange system.

5. The method of claim 3, further comprising operating the first battery server of the first node to carry out an act of:

in response to determining that power is not presently being shared between nodes of the plurality of nodes and no node is currently requesting receipt of power from one or more other nodes of the plurality of nodes, configuring the first node to no longer act as the master node.

6. The method of claim 3, wherein controlling transmission of power from another node to the first node comprises transmitting at least one instruction to a second battery server of a second node of the plurality of nodes instructing the second battery server to transmit DC power from a second storage battery of the second node to the first node via a power bus of the power interchange system that interconnects the plurality of nodes.

7. The method of claim 6, wherein controlling transmission of power from another node to the first node further comprises:

receiving information regarding a state of charge of storage batteries of one or more nodes of the plurality of nodes other than the first node; and

based on an evaluation of the state of charge for the one or more nodes other than the first node, selecting the second node to supply power to the first node.

8. The method of claim 3, further comprising operating the first battery server of the first node to carry out an act of:

in response to determining that no node is currently acting as the master node, arbitrating between the plurality of nodes which node will act as the master node.

9. The method of claim 1, wherein requesting that the master node control transmission of power from another node to the first node comprises requesting that a second node of the plurality of nodes control transmission of power from another node to the first node.

10. The method of claim 1, further comprising operating the first battery server of the first node to carry out acts of:

in response to receiving, from a second battery server of a second node of the plurality of nodes, a request to transmit power to the second node,

determining whether the state of charge of the first storage battery and/or the usage rate of power satisfies one or more second conditions;

in response to determining that the state of charge and/or the usage rate satisfies the one or more conditions, transmitting at least one first message to the second battery server informing the second battery server that the first node is able to supply power; and

in response to determining that the state of charge and/or the usage rate does not satisfy the one or more conditions, transmitting at least one second message to the second battery server informing the second battery server that the first node is not able to supply power.

11. The method of claim 10, further comprising operating the first battery server of the first node to carry out acts of:

in response to receiving a request from the master node to transmit power to the second node of the plurality of nodes, transmitting power via a power bus of the power interchange system that interconnects the plurality of nodes.

12. The method of claim 11, wherein transmitting the power via a power bus comprises controlling a power output from a DC-to-DC voltage converter of the first node.

13. A battery server for use with a first node of a power interchange system that distributes direct current (DC) power between a plurality of nodes, wherein the battery server comprises:

a storage battery to store electrical energy;

at least one processor; and

at least one computer-readable storage medium having encoded thereon executable instructions that, when executed by the at least one processor, cause the at least one processor to carry out a method comprising;

monitoring a state of charge in the storage battery and a usage rate of power by one or more electrical components of the first node; and

in response to detecting that the state of charge of the storage battery and/or the usage rate of power satisfies one or more conditions, requesting that a master node of the power interchange system control transmission of power from another node of the plurality of nodes to the first node, wherein the master node is one of the plurality of nodes.

14. The battery server of claim 13, wherein requesting that the master node control transmission of power from another node to the first node comprises, in a case that the first node is the master node, controlling transmission of power from another node to the first node.

15. The battery server of claim 14, wherein the method further comprises:

in response to determining that no node is currently acting as the master node, arbitrating between the plurality of nodes which node will act as the master node.

16. The battery server of claim 13, wherein the method further comprises:

in response to receiving, from a second battery server of a second node of the plurality of nodes, a request to transmit power to the second node,

determining whether the state of charge of the first storage battery and/or the usage rate of power satisfies one or more second conditions;

in response to determining that the state of charge and/or the usage rate satisfies the one or more conditions, transmitting at least one first message to the second battery server informing the second battery server that the first node is able to supply power; and

in response to determining that the state of charge and/or the usage rate does not satisfy the one or more conditions, transmitting at least one second message to the second battery server informing the second battery server that the first node is not able to supply power.

17. A power interchange system for distributing direct current (DC) power between a plurality of nodes, the power interchange system comprising:

a power bus interconnecting the plurality of nodes;

a first node of the plurality of nodes comprising a first battery server, a first storage battery, and first electrical components; and

a second node of the plurality of nodes comprising a second battery server, a second storage battery, and second electrical components, wherein the first battery server is programmed to carry out acts of;

monitoring a state of charge in a first storage battery of the first node and a usage rate of power by one or more first electrical components of the first node; and

in response to detecting that the state of charge of the first storage battery and/or the usage rate of power by the one or more first electrical components satisfies one or more conditions, requesting that a master node of the power interchange system control transmission of power from another node of the plurality of nodes to the first node, wherein the master node is one of the plurality of nodes.

18. The power interchange system of claim 17, wherein the second battery server is programmed to carry out acts of:

monitoring a state of charge in a second storage battery of the second node and a usage rate of power by one or more second electrical components of the second node; and

in response to detecting that the state of charge of the second storage battery and/or the usage rate of power by the one or more second electrical components satisfies one or more conditions, requesting that the master node of the power interchange system control transmission of power from another node of the plurality of nodes to the second node.

19. The power interchange system of claim 17, wherein both the first battery server and the second battery server are further configured to carry out an act of:

in response to determining that no node is currently acting as the master node, arbitrating between the plurality of nodes which node will act as the master node.

20. The power interchange system of claim 17, wherein requesting that the master node control transmission of power from another node to the first node comprises, in a case that the first node is the master node, controlling transmission of power from another node to the first node.