Power supply apparatus and controlling method of the same

• US 9,231,440 B2
• Filed: 08/29/2012
• Issued: 01/05/2016
• Est. Priority Date: 04/18/2012
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Son, Seung-Hyun, Lee, Chan-Jae, Chung, Gon-Jin, Choi, Bo-Ra, Park, Sin-Young
• Primary Examiner(s): Whitmore, Stacy
• Application Number:
  US13/597,952
• Publication Number:
  US 20130278216A1
• Time in Patent Office: 1,224 Days
• Field of Search: 320/117, 320/118, 320120-122, 320127-128, 320/132, 320/135
• US Class Current: 1/1
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/0019 using switched or multiplexed charge circuits
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

A power supply including: a power supply circuit for receiving an external power and a battery power, and for outputting a power including at least one of the external power or the battery power to a load; and a battery pack coupled to the power supply circuit, the battery pack including a plurality of batteries, which are arranged into a plurality of battery groups including a first battery group and a second battery group, and configured to provide the battery power. Where, the battery pack is configured to selectively supply a power of the first battery group or a power of the second battery group as the battery power to the power supply circuit according to at least one of a status of the external power, a status of the load, a status of the first battery group, or a status of the second battery group.

Claims

1. A power supply comprising:

a power supply circuit configured to receive a first power from an external power source, to receive a battery power, and to output a second power comprising at least one of the first power or the battery power to an external load;

a battery pack coupled to the power supply circuit, the battery pack comprising a plurality of batteries, which are arranged into a plurality of battery groups comprising a first battery group and a second battery group, and configured to provide the battery power; and

a controller configured to control the power supply circuit and the battery pack according to at least one of a status of the external power source, a status of the external load, a status of the first battery group, or a status of the second battery group,

wherein the battery pack is configured to selectively supply a power of the first battery group or a power of the second battery group as the battery power to the power supply circuit according to at least one of a status of the external power source, a status of the external load, a status of the first battery group, or a status of the second battery group,

wherein the battery pack further comprises a battery management system configured to control charging and discharging of each of the first battery group and the second battery group according to a battery control signal from the controller,

wherein the power supply circuit comprises;

an input terminal configured to receive the first power;

an output terminal configured to output the second power;

a first power converter coupled between the input terminal and a first node, and configured to convert the first power to a converted first power having a voltage suitable for charging the batteries, and to output the converted first power to the first node; and

a second power converter coupled between the first node and the output terminal, and configured to convert the converted first power or the battery power to the second power having a voltage suitable for use by the external load, and to output the second power to the output terminal, and

wherein the first battery group and the second battery group are selectively electrically coupled to the first node.

2. The power supply of claim 1,

wherein the power supply circuit further comprises a bypass circuit coupled between the input terminal and the output terminal, and configured to transfer the first power to the output terminal without conversion in response to a bypass control signal from the controller.

3. The power supply of claim 1,

wherein the power supply circuit further comprises:

a first switch interposed between the input terminal and the first power converter, and configured to electrically couple the input terminal to the first power converter in response to a first switch control signal from the controller; and

a second switch interposed between the second power converter and the output terminal, and configured to electrically couple the second power converter to the output terminal in response to a second switch control signal from the controller.

4. The power supply of claim 1,

wherein the battery pack further comprises:

a first battery group switch interposed between the first node and the first battery group, and configured to electrically couple the first battery group to the first node in response to a first battery group switch control signal from the battery management system; and

a second battery group switch interposed between the first node and the second battery group, and configured to electrically couple the second battery group to the first node in response to a second battery group switch control signal from the battery management system, and

wherein the battery management system is configured to generate the first and second battery group switch control signals according to the battery control signal.

5. The power supply of claim 1, wherein the controller is configured to:

determine an occurrence of a first emergency situation or a second emergency situation, which is different from the first emergency situation, according to at least one of the status of the external source or the external load.

6. The power supply of claim 5, wherein the controller is configured to:

when the controller determines the first emergency situation has occurred, generate the battery control signal to selectively discharge the first battery group or the second battery group such that the second power comprises the power of the first battery group or the second battery group, and to operate the non-selected one of the first and second battery groups in a stand-by mode;

determine whether or not the first emergency situation has finished;

after the first emergency situation has finished, generate the battery control signal to stop discharging the selected one of the first and second battery groups; and

select between the first and second battery groups for discharge.

7. The power supply of claim 6, wherein the controller is configured to dynamically select between the first and second battery groups for discharge.

8. The power supply of claim 6, wherein the power supply circuit is configured to concurrently supply the first power and the power of the first battery group or the second battery group, such that the second power comprises the power of the first battery group or the second battery group, and the first power.

9. The power supply of claim 5, wherein the controller is configured to:

compare state of charge (SOC) values of the plurality of battery groups to each other;

when the SOC value of one of the plurality of battery groups is the greatest among the SOC values of all of the plurality of battery groups, generate the battery control signal to discharge the one of the battery groups such that the second power comprises the power of the one of the battery groups, and to operate all other ones of the plurality of battery groups in a stand-by mode;

determine whether or not the first emergency situation or the second emergency situation has finished; and

after the first emergency situation or the second emergency situation has finished, generate the battery control signal to stop discharging the one of the plurality of battery groups.

10. The power supply of claim 5, wherein the controller is configured to:

compare discharge numbers of the plurality of battery groups to each other;

when the discharge number of one of the plurality of battery groups is the least from among the discharge numbers, generate the battery control signal to discharge the one of the plurality of battery groups, and to operate all other ones of the plurality of battery groups in a stand-by mode;

determine whether or not the first emergency situation or the second emergency situation has finished; and

after the first emergency situation or the second emergency situation has finished, generate the battery control signal to stop discharging the one of the plurality of battery groups.

11. The power supply of claim 5, wherein the controller is configured to:

compare temperatures of the plurality of battery groups to each other;

when a temperature of one of the plurality of battery groups is the least from among the temperatures of the plurality of battery groups, generate the battery control signal to discharge the one of the battery groups such that the second power comprises the power of the one of the battery groups, and to operate all other ones of the plurality of battery groups in a stand-by mode;

determine whether or not the first emergency situation or the second emergency situation has finished; and

after the first emergency situation or the second emergency situation has finished, generate the battery control signal to stop discharging the one of the plurality of battery groups.

12. The power supply of claim 5, wherein the controller is configured to:

determine the occurrence of the first emergency situation when a stoppage of the external power source occurs; and

determine the occurrence of the second emergency situation when a power requirement of the external load is greater than the power of the external power source.

13. The power supply of claim 1, wherein the battery pack further comprises:

a first temperature sensor configured to sense a temperature of the first battery group and to transmit the sensed temperature of the first battery group to the battery management system; and

a second temperature sensor configured to sense a temperature of the second battery group and to transmit the sensed temperature of the second battery group to the battery management system.

14. A battery pack for supplying power to an external device comprising:

a plurality of batteries, which are arranged into a plurality of battery groups; and

a battery management system configured to;

monitor a status of each of the battery groups, each status comprising at least one of a state of charge (SOC), a discharge number, or a temperature of a corresponding one of the battery groups;

monitor a status of the external device;

select at least one of the battery groups from among the battery groups to discharge its power to the external device according to the status of each of the battery groups and the status of the external device;

control the remaining battery groups that were not selected to operate in a stand-by mode;

compare the discharge numbers of the battery groups to each other; and

when the discharge number of one of the battery groups is the lowest among the discharge numbers of all of the battery groups, select the one of the battery groups to discharge its power to the external device, and operate all other ones of the battery groups in a stand-by mode.

15. The battery pack of claim 14,

further comprising a plurality of switches, wherein

each switch is coupled to a corresponding one of the battery groups and an output node, and

the battery management system is configured to control the switches to selectively couple the battery groups to the output node.

16. The battery pack of claim 15, wherein the battery management system is configured to:

compare the state of charge (SOC) values of the battery groups to each other; and

when the SOC value of one of the battery groups is the greatest among the SOC values of all of the battery groups, select the one of the battery groups to discharge its power to the external device, and operate all other ones of the battery groups in a stand-by mode.

17. The battery pack of claim 15, wherein the battery management system is configured to:

compare temperature values of the battery groups to each other; and

when a temperature value of one of the battery groups is the lowest among the temperature values of all of the battery groups, select the one of the battery groups to discharge its power to the external device, and operate all other ones of the battery groups in a stand-by mode.