# US 2014/0152100 A1 · Power storage system and driving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152100 A1 - Document ID: US20140152100A1 - Status: Published application - Kind: A1 - Application number: 13/897,589 - Filed: 2013-05-20 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Hyung-Hoon LIM - Web page: https://patentgrep.com/patent/US20140152100A1 ## CPC - H02J 3/32: using batteries or super capacitors with converting means - H02J 3/381: {Dispersed generators} - H02J 7/52: for charge balancing, e.g. equalisation of charge between batteries - H02J 7/60: including safety or protection arrangements - H02J 9/062: {for AC powered loads} - H02J 2101/20: Dispersed power generation using renewable energy sources - H02J 2101/24: Photovoltaics - H02J 2101/28: Wind energy - Y02B 10/70: Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies - Y02E 10/56: Power conversion systems, e.g. maximum power point trackers - Y02E 10/76: Power conversion electric or electronic aspects - Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A power storage system includes a battery that stores power, a first switch connected between a first node and the battery, the first switch forming a path for charging the battery and including a body diode, and a first diode connected between terminals of the first switch and forming a path for discharging the battery. ## Claims ### Claim 1 A power storage system, comprising: a battery that stores power; a first switch connected between a first node and the battery, the first switch forming a path for charging the battery and including a body diode; and a first diode connected between terminals of the first switch and forming a path for discharging the battery. ### Claim 2 (depends on 1) The power storage system as claimed in claim 1, further comprising a second switch connected between the first switch and the battery and forming a path for charging and discharging the battery. ### Claim 3 (depends on 2) The power storage system as claimed in claim 2, wherein: when the battery is in a state of being charged, the first switch and the second switch are in a turned on state, and when the battery is in a state of being discharged, the first switch is in a turned off state and the second switch is in the turned on state. ### Claim 4 (depends on 2) The power storage system as claimed in claim 2, wherein the second switch is in a turned-off state to protect the battery when a fault occurs in the battery. ### Claim 5 (depends on 2) The power storage system as claimed in claim 2, further comprising a battery management system that manages the battery, the battery management system controlling the first switch and the second switch. ### Claim 6 (depends on 5) The power storage system as claimed in claim 5, further comprising a DC-DC converter that converts a first voltage output from the battery into a second voltage, the second voltage being supplied as power for operating the battery management system. ### Claim 7 (depends on 6) The power storage system as claimed in claim 6, further comprising an AC-DC converter that converts a voltage of a common grid into a third voltage, the third voltage being supplied as power for operating the battery management system. ### Claim 8 (depends on 7) The power storage system as claimed in claim 7, wherein: when a power failure occurs in the common grid, the second voltage is used as power for operating the battery management system, and when the common grid is operated normally, the third voltage is used as power for operating the battery management system. ### Claim 9 (depends on 5) The power storage system as claimed in claim 5, wherein the battery includes a first battery rack and a second battery rack respectively including a plurality of cells, and the battery management system includes a first battery management system managing the first battery rack and a second battery management system managing the second battery rack. ### Claim 10 (depends on 9) The power storage system as claimed in claim 9, wherein: a voltage output from the first battery rack and a voltage output from the second battery rack are output to the first node, the power storage system further includes a DC-DC converter that converts a first voltage of the first node into a second voltage, and the second voltage is used as power for operating the first battery management system and the second battery management system. ### Claim 11 (depends on 1) The power storage system as claimed in claim 1, further comprising: a first power converter that converts a first power into a second power and provides the second power to the first node; and a second power converter that converts the power of the first node into a third power and supplies the third power to a common grid or a load. ### Claim 12 A method of driving a power storage system, the method comprising: providing a battery storing power; converting a first power into a second power and providing the second power to a first node; charging the battery through a first current path by using the second power provided to the first node; and discharging the battery through a second current path, the second current path including a diode connected between the battery and the first node. ### Claim 13 (depends on 12) The method as claimed in claim 12, wherein the charging of the battery includes turning on a first switch, the first switch being connected between the first node and the battery and including a body diode, to form the first current path. ### Claim 14 (depends on 13) The method as claimed in claim 13, wherein the charging of the battery includes turning on a second switch, the second switch being connected between the first switch and the battery, to form the first current path. ### Claim 15 (depends on 14) The method as claimed in claim 14, wherein the discharging of the battery includes turning off the first switch and turning on the second switch to form the second current path. ### Claim 16 (depends on 12) The method as claimed in claim 12, further comprising: converting a first voltage output from the battery into a second voltage; and providing the second voltage to a battery management system managing the battery. ### Claim 17 (depends on 16) The method as claimed in claim 16, further comprising: converting a voltage of a common grid into a third voltage; and providing the third voltage to the battery management system, wherein: when a power failure occurs in the common grid, the second voltage is used as power for operating the battery management system, and when the common grid is operated normally, the third voltage is used as power for operating the battery management system.