Battery control method and apparatus, and battery pack

Patent metadata

Field	Value
Publication number	US-10270262-B2
Application number	US-201615385360-A
Country	US
Kind code	B2
Filing date	Dec 20, 2016
Priority date	Dec 21, 2015
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A battery control apparatus includes: a controller configured to control a switch network to control a connection between a converter and a first battery included in a battery group, among batteries, based on switching time information set to correspond to the first battery, wherein the switching time information is set based on a ratio between first state difference information of the first battery and second state difference information that is calculated based on first state difference information items of the batteries.

First claim

What is claimed is:

1. A battery control apparatus for implementing a balancing of batteries, comprising:
a switch network configured to connect a first battery included in a battery group, of the batteries, to a converter or disconnect the first battery from the converter; and
a controller configured to initiate a balancing of the battery group based on determined respective switching time information for each of the battery group, including a control of the switch network to control a time at which the first battery is connected to the converter, based on a determined switching time information set to correspond to the first battery,
wherein the determined switching time information is set based on a ratio between first state difference information of the first battery and second state difference information that is determined based on first state difference information items of the batteries.

2. The battery control apparatus of claim 1 , wherein:
the first state difference information of the first battery comprises a difference value between state information of the first battery and average state information of the batteries; and
each of the first state difference information items of the batteries comprises, for a respective battery among the batteries, a difference value between state information of the respective battery and the average state information of the batteries, wherein
the state information of the respective battery is determined using a corresponding state-of-charge (SOC) and a corresponding state-of-health (SOH) of the respective battery.

3. The battery control apparatus of claim 1 , wherein the determined switching time information is set based on the ratio and a time interval corresponding to the battery group.

4. The battery control apparatus of claim 3 , wherein the controller is configured to control the converter to output, during a period of time corresponding to the determined switching time information, a physical quantity corresponding to an output value defined based on the ratio.

5. The battery control apparatus of claim 4 , wherein the output value is defined based on the ratio and an average output physical quantity.

6. The battery control apparatus of claim 1 , wherein the controller includes a switch driver configured to transfer a switching signal generated based on the switching time information to the switch network.

7. The battery control apparatus of claim 1 , wherein:
the controller is configured to control the switch network to control a connection between the converter and a second battery included in the battery group, based on a determined second switching time information set to correspond to the second battery; and
the switch network is configured to selectively connect the first battery and the second battery to the converter, respectively during the determined first and second switching time information, under a control of the controller.

8. The battery control apparatus of claim 7 , wherein the first battery and the second battery are configured to be non-simultaneously connected to the converter.

9. The battery control apparatus of claim 7 , wherein:
the controller is configured to control the converter to output, in a preset sequence, a physical quantity corresponding to an output value defined based on the ratio and a physical quantity corresponding to a second output value defined based on a second ratio; and
the second ratio is a ratio between first state difference information of the second battery and the second state difference information.

10. A battery pack, comprising:
a battery group among batteries;
a first battery control apparatus configured to determine a ratio between first state difference information of a first battery included in the battery group and second state difference information that is determined based on first state difference information items of the batteries, and set switching time information of the first battery, the switching time information determined based on the ratio; and
a second battery control apparatus configured to initiate a balancing of the battery group, including a control of a connection of the first battery to a converter and control a time at which the first battery is connected to the converter based on the switching time information.

11. The battery pack of claim 10 , wherein:
the first state difference information of the first battery comprises a difference value between state information of the first battery and average state information of the batteries; and
each of the first state difference information items of the batteries comprises, for a respective battery among the batteries, a difference value between state information of the respective battery and the average state information of the batteries, wherein
the state information of the respective battery is determined using a corresponding state-of-charge (SOC) and a corresponding state-of-health (SOH) of the respective battery.

12. The battery pack of claim 10 , wherein the first battery control apparatus is configured to determine the switching time information, to be set for the first battery, based on the ratio and a time interval corresponding to the battery group.

13. The battery pack of claim 12 , wherein the second battery control apparatus is configured to control the converter to output, during a period of time corresponding to the determined switching time information, a physical quantity corresponding to an output value defined based on the ratio.

14. The battery pack of claim 12 , wherein the output value is defined based on the ratio and an average output physical quantity.

15. The battery pack of claim 10 , wherein the second battery control apparatus comprises:
a switch network comprising a switch configured to connect the first battery to the converter; and
a switch driver configured to transfer a switching signal generated based on the switching time information to the switch network.

16. The battery pack of claim 15 , wherein:
the second battery control apparatus is configured to control the switch network to control a connection between the converter and a second battery included in the battery group based on a determined second switching time information set to correspond to the second battery; and
the switch network is configured to selectively connect the first battery and the second battery to the converter, respectively during the determined first and second switching time information, under a control of the second battery control apparatus.

17. The battery pack of claim 16 , wherein the first battery and the second battery are configured to be non-simultaneously connected to the converter.

18. The battery pack of claim 15 , wherein the second battery control apparatus is configured to control the converter to output, in a preset sequence, a physical quantity corresponding to an output value defined based on the ratio and a physical quantity corresponding to a second output value defined based on a second ratio, and
the second ratio is a ratio between first state difference information of the second battery and the second state difference information.

19. A battery control method, performed by one or more processors, for implementing a balancing of batteries, the method comprising:
initiate a balancing of a battery group, of the batteries, based on determined respective switching time information for each battery of the battery group, including controlling a connecting of a first battery included in the battery group to a convert

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Youngjae
• Yeo Taejung

Classifications

• H02J2105/30

  the load networks being external to vehicles, i.e. exchanging power with vehicles · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/63

  against overdischarge · CPC title

• H02J7/61

  against overcharge · CPC title

• H02J7/825

  Detection of fully charged condition · CPC title