Charging and discharging control device, charging and discharging control system, charging and discharging control method, and non-transitory computer readable medium with charging and discharging control program recorded therein

Patent metadata

Field	Value
Publication number	US-10547181-B2
Application number	US-201816053122-A
Country	US
Kind code	B2
Filing date	Aug 2, 2018
Priority date	Aug 7, 2017
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

A charging and discharging control device is configured to control switching operations of a plurality of switching devices in a first control mode such that only a part of the plurality of battery groups are connected to the electrical load when a measured temperature of the battery pack has not reached a predetermined determination temperature when discharging of the battery pack is performed, and controls the switching operations of the plurality of switching devices in a second control mode such that all of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has reached the predetermined determination temperature when discharging of the battery pack is performed.

First claim

The invention claimed is:

1. A charging and discharging control device which is configured to control charging and discharging of a battery pack which includes a plurality of battery groups connected to an electrical load in parallel, and a plurality of switching devices each connected to the plurality of battery groups and performing a switching operation to switch between a connected state and a non-connected state of the plurality of battery groups to the electrical load, the charging and discharging control device comprising:
a temperature measurement unit configured to measure a temperature of the battery pack;
a temperature determination unit configured to receive an input of a measured temperature of the battery pack measured by the temperature measurement unit and to determine whether the measured temperature has reached a predetermined determination temperature; and
a switching operation control unit configured to control the switching operations of the plurality of switching devices in a first control mode such that only a part of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has not reached the predetermined determination temperature when discharging of the battery pack is performed, and to control the switching operations of the plurality of switching devices in a second control mode such that all of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has reached the predetermined determination temperature when discharging of the battery pack is performed.

2. The charging and discharging control device according to claim 1 ,
wherein in the first control mode, the switching operation control unit is configured to control the switching operations of the plurality of switching devices such that the plurality of battery groups are sequentially connected to the electrical load one by one only for a predetermined connection time.

3. The charging and discharging control device according to claim 2 ,
wherein the predetermined connection time is set to the same time for all of the plurality of battery groups.

4. The charging and discharging control device according to claim 2 ,
wherein the predetermined connection time is set for each of the plurality of battery groups in accordance with an arrangement of the plurality of battery groups in the battery pack.

5. The charging and discharging control device according to claim 1 ,
wherein the switching device is a switching element.

6. The charging and discharging control device according to claim 1 ,
wherein the switching device is a DC/DC converter.

7. A charging and discharging control system which is configured to control charging and discharging of a battery pack comprising:
the charging and discharging control device according to claim 1 , and the battery pack.

8. A charging and discharging control method which is configured to control charging and discharging of a battery pack which includes a plurality of battery groups connected to an electrical load in parallel, and a plurality of switching devices each connected to the plurality of battery groups and performing a switching operation to switch between a connected state and a non-connected state of the plurality of battery groups to the electrical load, the charging and discharging control method comprising:
a temperature measurement step of measuring a temperature of the battery pack;
a temperature determination step of receiving an input of a measured temperature of the battery pack measured in the temperature measurement step and determining whether the measured temperature has reached a predetermined determination temperature; and
a switching operation control step of controlling the switching operations of the plurality of switching devices in a first control mode such that only a part of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has not reached the predetermined determination temperature when discharging of the battery pack is performed, and of controlling the switching operations of the plurality of switching devices in a second control mode such that all of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has reached the predetermined determination temperature when discharging of the battery pack is performed.

9. A non-transitory computer readable medium with a charging and discharging control program recorded therein, the charging and discharging control program is configured to cause a computer, as a charging and discharging control device for controlling charging and discharging of a battery pack that includes a plurality of battery groups connected to an electrical load in parallel, and a plurality of switching devices each connected to the plurality of battery groups and performing a switching operation to switch between a connected state and a non-connected state of the plurality of battery groups to the electrical load, to function as
a temperature measurement unit configured to measure a temperature of the battery pack;
a temperature determination unit configured to receive an input of a measured temperature of the battery pack measured by the temperature measurement unit and to determine whether the measured temperature has reached a predetermined determination temperature; and
a switching operation control unit configured to control the switching operations of the plurality of switching devices in a first control mode such that only a part of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has not reached the predetermined determination temperature when discharging of the battery pack is performed, and to control the switching operations of the plurality of switching devices in a second control mode such that all of the plurality of battery groups are connected to the electrical load when the measured temperature of the battery pack has reached the predetermined determination temperature when discharging of the battery pack is performed.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Maruyama Masanori

Classifications

• H02J7/977

  of the battery · CPC title

• H02J7/975

  in response to temperature · CPC title

• H02J7/50 Primary

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/0021 Primary

  Electricity · mapped topic

• H02J7/0091

  Electricity · mapped topic