ELECTRICITY-STORAGE SYSTEM, MONITORING DEVICE, AND POWER CONTROL SYSTEM

• US 20180159350A1
• Filed: 01/30/2018
• Published: 06/07/2018
• Est. Priority Date: 03/22/2013
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: TOYA, Shoichi, INAKAGATA, Satoru
• Granted Patent: US 10,862,322 B2
• Time in Patent Office: Days
• CPC Class Codes: G01R 19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 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 Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: Y02B 10/70 Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

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

Claims

1. An electricity-storage system comprising:

a secondary battery;

a first connector terminal that is electrically connectable to a power line network;

a second connector terminal that is electrically connectable to an external device;

a switcher that switches a supply destination for electrical power from the secondary battery between the first connector terminal and the second connector terminal; and

a controller that

makes the switcher switch to the first connector terminal and causes discharge from the secondary battery according to a synchronous scheme in which electrical power is discharged synchronized with a phase of electrical power flowing in the power line network, and

makes the switcher switch to the second connector terminal and causes discharge from the secondary battery according to an asynchronous scheme in which electrical power is discharged at a reference voltage.

2. The electricity-storage system according to claim 1, wherein

the controller

makes the switcher switch to the first connector terminal and causes discharge from the secondary battery according to the synchronous scheme when the power line network is not in a state of power outage, and

makes the switcher switch to the second connector terminal and causes discharge from the secondary battery according to the asynchronous scheme when the power line network is in a state of power outage.

3. An operating method of an electricity-storage system including

a secondary battery,

a first connector terminal that is electrically connectable to a power line network, and

a second connector terminal that is electrically connectable to an external device, the operating method comprising:

switching a supply destination for electrical power from the secondary battery to the first connector terminal and causing discharge from the secondary battery according to a synchronous scheme in which electrical power is discharged synchronized with a phase of electrical power flowing in the power line network; and

switching the supply destination for electrical power from the secondary battery to the second connector terminal and causing discharge from the secondary battery according to an asynchronous scheme in which electrical power is discharged at a reference voltage.

4. The operating method according to claim 3, wherein

the switching of the supply destination to the first connector terminal and the causing of discharge according to the synchronous scheme are executed when the power line network is not in a state of power outage, and

the switching of the supply destination to the second connector terminal and the causing of discharge according to the asynchronous scheme are executed when the power line network is in a state of power outage.