Charge and discharge control device, charge and discharge system, charge and discharge control method, and non-transitory storage medium

Patent metadata

Field	Value
Publication number	US-11735781-B2
Application number	US-202017007192-A
Country	US
Kind code	B2
Filing date	Aug 31, 2020
Priority date	Jan 17, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A charge and discharge control device that controls charging and discharging of a battery module in which a plurality of cell blocks, each including one or more unit cells, are connected in parallel to one another. A controller of the charge and discharge control device controls a current flowing through each of the cell blocks based on at least one of a current load of each of the cell blocks or a parameter relating to the current load.

First claim

What is claimed is:

1. A charge and discharge control method of controlling charging and discharging of a battery module in which a plurality of cell blocks, each including one or more unit cells, are connected in parallel to one another, the method comprising:
calculating a ratio of a measurement value of a current relative to any one of a cell block capacity, a positive electrode capacitance and a negative electrode capacitance as a current load in regard to each of the cell blocks;
suppressing an input current or an output current of the battery module, in which all of the cell blocks are connected in parallel, based on a fact that the calculated current load is equal to or greater than a threshold value in one or more of the cell blocks, as compared to a case in which the current load is smaller than the threshold value in all of the cell blocks; and
charging the battery module by the suppressed input current or discharging the battery module by the suppressed output current, so as to change a state of charge (SOC) of the battery module.

2. A charge and discharge control device comprising a processor configured to perform the charge and discharge control method according to claim 1 .

3. A non-transitory storage medium storing a charge and discharge control program, the program causing a computer to perform the charge and discharge control method according to claim 1 .

Assignees

• Toshiba Kk

Inventors

• Sugiyama Nobukatsu
• Fujita Yumi
• Morita Tomokazu
• Ishii Ena

Classifications

• H02J7/963

  in response to battery voltage gradient · CPC title

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/94

  in response to battery current · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/62

  against overcurrent · CPC title