Electricity-storage system, monitoring device, and power control system

Patent metadata

Field	Value
Publication number	US-10651666-B2
Application number	US-201815883539-A
Country	US
Kind code	B2
Filing date	Jan 30, 2018
Priority date	Mar 22, 2013
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

An electricity-storage system 110 a is configured to be able to charge and discharge by connecting a plug to an electrical outlet 140 a . Power discharged from the electricity-storage system 110 a is monitored by a reverse-power monitoring device 100 and discharge from the electricity-storage system 110 a is executed according to instruction from the reverse-power monitoring device 100 , in order to avoid reverse power flow to an electrical grid 150.

First claim

The invention claimed is:

1. An electricity-storage system comprising:
a first electricity-storage system including a first storage battery, a first communication device, and a first controller that transmits a signal via the first communication device when a power outage occurs; and
a second electricity-storage system including a second storage battery, a second communication device in communication with the first communication device, a DC/AC inverter, and a second controller that stops discharge from the second storage battery to the DC/AC inverter and then to an AC power line network when the second communication device receives the signal from the first communication device, the AC power line network being connected to a load external to the second electricity-storage system,
wherein the first storage battery is configured to supply electrical power to a load external to the first electricity-storage system, and the second storage battery is configured to supply electrical power to the load external to the second electricity-storage system, and
a destination of the signal transmitted by the first controller via the first communication device is the second-electricity storage system.

2. An electricity-storage system operating method comprising:
among a plurality of electricity-storage systems that each include a storage battery for supplying electrical power to an external load, and a DC/AC inverter, transmitting from a given electricity-storage system a signal to another electricity-storage system when a power outage occurs; and
stopping discharge from the storage battery to the DC/AC inverter and then to an AC power line network of the other electricity-storage system that receives the signal, the AC power line network being connected to a load external to the other electricity-storage system,
wherein a destination of the signal transmitted by the given electricity-storage system is the other electricity-storage system.

3. The electricity-storage system of claim 1 , wherein
the first electricity-storage system further comprises a connector terminal that is electrically connectable to the AC power line network to supply electrical power of the first storage battery to the AC power line network.

4. The electricity-storage system operating method of claim 2 , further comprising
the given electricity-storage system supplying electrical power from the storage battery thereof to the AC power line network.

5. An electricity-storage system comprising:
a second transmitter that communicates via a first transmitter with a first electricity-storage system including a first storage battery and the first transmitter, the first transmitter transmitting a signal when a power outage occurs;
a second storage battery;
a DC/AC inverter; and
a second controller that causes the second storage battery to stop discharge to the DC/AC inverter and then to an AC power line network upon the second transmitter receiving the signal from the first transmitter, the AC power line network being connected to a load external to the electricity-storage system,
wherein the first storage battery is configured to supply electrical power to a load external to the first electricity-storage system, and the second storage battery is configured to supply electrical power to the load external to the electricity-storage system, and
a destination of the signal transmitted by the first transmitter is the electricity storage system.

6. An electricity-storage system operating method comprising:
among a plurality of electricity-storage systems that each include a storage battery for supplying electrical power to an external load, and a DC/AC inverter, receiving a signal transmitted from a given electricity-storage system when a power outage occurs; and
stopping discharge from the storage battery to the DC/AC inverter and then to an AC power line network from the electricity-storage system that receives the signal, the AC power line network being connected to a load external to the other electricity-storage system,
wherein a destination of the signal transmitted by the given electricity-storage system is the electricity storage system.

7. The electricity-storage system of claim 5 , wherein
the first electricity-storage system further comprises a connector terminal that is electrically connectable to the AC power line network to supply electrical power of the first storage battery to the AC power line network.

8. The electricity-storage system operating method of claim 6 , further comprising the given electricity-storage system supplying electrical power from the storage battery thereof to the AC power line network.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Toya Shoichi
• Inakagata Satoru

Classifications

• H02J7/35

  with light sensitive cells · CPC title

• H01M10/44

  Methods for charging or discharging (circuits for charging H02J7/00) · CPC title

• G01R19/2513

  Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging · CPC title

• H02J9/061

  for DC powered loads · CPC title

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title