TEMPERATURE CONTROLLING SYSTEM AND METHOD FOR BATTERY

• US 20140197778A1
• Filed: 07/03/2013
• Published: 07/17/2014
• Est. Priority Date: 01/16/2013
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Kim, Ki-Seon
• Granted Patent: US 9,356,323 B2
• Time in Patent Office: Days
• US Class Current: 320/107
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/00711 with introduction of pulses during the charging process
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The present invention provides a temperature controlling system for a battery in an energy storage system, the temperature controlling system including: a converter comprising a plurality of switches and a converter inductor, the converter being configured to increase or decrease a voltage of the battery; a DC linker comprising first and second capacitors that are coupled in series and configured to stabilize an output voltage of the converter; and an inverter comprising a plurality of switches and an inductor, the inverter being configured to invert an input voltage, wherein the inverter further comprises a switch coupled between a terminal of the inductor and a first node between the first and second capacitors of the DC linker to provide a current from the inductor to the battery.

Claims

1. A temperature controlling system for a battery in an energy storage system, the temperature controlling system comprising:

a converter comprising a plurality of switches and a converter inductor, the converter being configured to increase or decrease a voltage of the battery;

a DC linker comprising first and second capacitors that are coupled in series and configured to stabilize an output voltage of the converter; and

an inverter comprising a plurality of switches and an inductor, the inverter being configured to invert an input voltage,

wherein the inverter further comprises a switch coupled between a terminal of the inductor and a first node between the first and second capacitors of the DC linker to provide a current from the inductor to the battery.

2. The temperature controlling system of claim 1, wherein the converter comprises:

the converter inductor coupled to a first terminal of the battery;

a first switch coupled between a first terminal of the first capacitor of the DC linker and a second terminal of the converter inductor; and

a second switch coupled between the second terminal of the converter inductor and a second terminal of the battery.

3. The temperature controlling system of claim 2, further comprising a third switch coupled between the first terminal of the battery and the first terminal of the first capacitor of the DC linker.

4. The temperature controlling system of claim 1, wherein the switches of the inverter are implemented in a half-bridge structure.

5. The temperature controlling system of claim 4, wherein the switches of the half-bridge structure include:

a first switch coupled between a first terminal of the first capacitor of the DC linker and a first terminal of the inductor; and

a second switch coupled between the first terminal of the inductor and a second terminal of the battery.

6. The temperature controlling system of claim 5, wherein the inductor is coupled between a second node between the first and second switches and a first switch of a load linker, the load linker being configured to control a linkage between the energy storage system and a load.

7. The temperature controlling system of claim 5, further comprising a third switch coupled between a second terminal of the inductor and the first node between the first and second capacitors of the DC linker.

8. A temperature controlling method for a battery in an energy storage system comprising:

sensing a low-temperature state of the battery being maintained for a period of time;

removing a coupling between a grid and a load from the energy storage system in response to the low-temperature state of the battery being maintained for the period of time;

forming a charging/discharging current path through which current generated in an inductor is provided to the battery; and

repetitively performing a charging/discharging operation of the battery through the charging/discharging current path by alternately operating a plurality of switches of an inverter.

9. The temperature controlling method of claim 8, further comprising coupling the energy storage system to the load and the grid after the temperature of the battery reaches a normal temperature range and blocking the formed charging/discharging current path.

10. The temperature controlling method of claim 8, wherein the plurality of switches of the inverter are implemented in a half-bridge structure.