Storage battery management device, method, and computer program

Patent metadata

Field	Value
Publication number	US-2016372935-A1
Application number	US-201514772041-A
Country	US
Kind code	A1
Filing date	Feb 24, 2015
Priority date	Feb 24, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

A storage battery management device according to an embodiment includes a chargeable/dischargeable capacity table that stores therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery; a controller that calculates an actual chargeable/dischargeable capacity by referring to the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery; and a communication controller that informs a host device about the calculated chargeable/dischargeable capacity of the secondary battery. Even in a storage battery system that repeats charging/discharging constantly, this configuration can correctly estimate the actual chargeable/dischargeable capacity and stably operate the storage battery system.

First claim

What is claimed is:

1 . A storage battery management device comprising:
a chargeable/dischargeable capacity table that stores therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery; a controller that calculates an actual chargeable/dischargeable capacity by referring to the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery; and a communication controller that informs a host device about the chargeable/dischargeable capacity of the secondary battery.

2 . The storage battery management device according to claim 1 , wherein the controller sets an operational capacity by securing a particular margin relative to the chargeable/dischargeable capacity obtained by referring to the chargeable/dischargeable capacity table.

3 . The storage battery management device according to claim 2 , wherein the controller, on receiving a request from the host device of the storage battery management device, sets the margin temporarily to zero.

4 . The storage battery management device according to claim 2 , wherein the controller sets the operational capacity based on a reference SOC set in advance.

5 . The storage battery management device according to claim 1 , wherein the controller calculates the battery degradation rate based on a measurement value or an estimation value of an internal resistance value of the secondary battery.

6 . The storage battery management device according to claim 1 , wherein the chargeable/dischargeable capacity table stores the chargeable/dischargeable capacity calculated by simulation, by using an equivalent circuit model of the secondary battery and a characteristic value of the secondary battery.

7 . A method, executed by a storage battery management device that includes a chargeable/dischargeable capacity table storing therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery, and manages charging/discharging of the secondary battery, the method comprising:
referring the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery; calculating an actual chargeable/dischargeable capacity based on a reference result of the chargeable/dischargeable capacity table; and informing a host device about the chargeable/dischargeable capacity of the secondary battery.

8 . A computer program product including programmed instructions embodied in and stored on a non-transitory computer readable medium, wherein the instructions for controlling a storage battery management device that includes a chargeable/dischargeable capacity table storing therein in advance a chargeable/dischargeable capacity corresponding to a temperature, a state of charge (SOC), a required charge rate or discharge rate, and a battery degradation rate of a secondary battery, and manages charging/discharging of the secondary battery, when executed by a computer, cause the computer to perform:
referring to the chargeable/dischargeable capacity table based on the temperature, the SOC, the required charge rate or discharge rate, and the battery degradation rate of the secondary battery; calculating an actual chargeable/dischargeable capacity based on a reference result of the chargeable/dischargeable capacity table; and informing a host device about the chargeable/dischargeable capacity of the secondary battery.

Assignees

• Toshiba Kk

Inventors

• Sakata Yasuji
• Mizutani Mami
• Kobayashi Takenori
• Toyosaki Tomohiro

Classifications

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/84

  Control of state of health [SOH] · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/50 Primary

  acting upon multiple batteries simultaneously or sequentially · CPC title

• G01R31/36

  Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] · CPC title