# US 2021/0242700 A1 · Automati power supply control device and method of battery management system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242700 A1 - Document ID: US20210242700A1 - Status: Published application - Kind: A1 - Application number: 17/065,710 - Filed: 2020-10-08 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Misum Systech Co., Ltd. - Applicants: Misum Systech Co., Ltd - Inventors: Bong Jun KOO; Jung Seop KIM; Jong Hak JUNG; Min Su CHUNG - Web page: https://patentgrep.com/patent/US20210242700A1 ## CPC - H02J 7/855: {with circuits adapted for supplying loads from the battery} - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H02J 7/82: Control of state of charge [SOC] - H02J 2207/20: Charging or discharging characterised by the power electronics converter - Y02E 60/10: Energy storage using batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present invention relates to an automatic power supply control device and method of a battery management system (BMS), and the automatic power supply control device of a BMS includes a converter receiving power of a battery to convert the power to power needed for a load, wherein the power input from the battery is controlled by a manual control signal (IGON), which is generated by a button operation of a user, or by a controller (MCU) of a BMS, a manual control signal generator generating the manual control signal (IGON), which is generated by the button operation of the user, for controlling the driving of the converter, a control signal conversion part configured to, when the manual control signal (IGON) is activated and a predetermined time has elapsed, transmit a signal (NIG), which indicates that the manual control signal (IGON) is activated, to the controller (MCU) and to inactivate the manual control signal (IGON), and the controller (MCU) driven by output power of the converter, and configured to activate a signal (MWAKEUP) for controlling the driving of the converter and to control power supplied to the load when receiving the signal (NIG) from the control signal conversion part. According to the present invention, control of power supply according to a condition of the load is not performed by the user, and the controller in a BMS may automatically control the battery, and since current consumption of the battery can be controlled, and quick discharge can be prevented, energy efficiency of the battery may be improved, complete discharge of the battery may be prevented, and thus a lifespan of the battery may be extended. ## Claims ### Claim 1 An automatic power supply control device of a battery management system (BMS) that automatically controls power supplied from a battery to a load, the device comprising: a converter configured to receive power of a battery to convert the power to power needed for a load, wherein the power input from the battery is controlled by a manual control signal (IGON) or by a controller (MCU) of the BMS; a manual control signal generator configured to generate the manual control signal (IGON) for controlling driving of the converter; a control signal conversion part configured to, when the manual control signal (IGON) is activated and a predetermined time has elapsed, transmit a signal (NIG), which indicates that the manual control signal (IGON) is activated, to the controller (MCU) and inactivate the manual control signal (IGON); and the controller (MCU) driven by output power of the converter and configured to activate a signal (MWAKEUP) for controlling the driving of the converter and to control power supplied to the load when receiving the signal (NIG) from the control signal conversion part. ### Claim 2 (depends on 1) The device of claim 1, wherein the control signal conversion part includes: a time delay part configured to distribute an output voltage output from the manual control signal generator and delay the distributed output voltage for the predetermined time; a first switch switched by the output voltage delayed by the time delay part to inactivate the manual control signal (IGON); and a second switch switched by the output voltage delayed by the time delay part to output the signal (NIG). ### Claim 3 (depends on 2) The device of claim 2, wherein the time delay part includes: a voltage distribution circuit configured to distribute the output voltage output from the manual control signal generator; and a time constant circuit configured to delay output of the voltage distribution circuit for the predetermined time. ### Claim 4 An automatic power supply control method of a battery management system (BMS) that automatically controls power supplied from a battery to a load, the method comprising: generating, by a user's switching, a manual control signal (IGON); waking, by the manual control signal (IGON), the converter up and generating power needed for a load using power of a battery; generating, by a controller (MCU), which is driven by the power generated by the converter, of the BMS, a signal (MWAKEUP) for controlling driving of the converter; inactivating the signal (IGON) among the signal (IGON) and a signal (MWAKEUP) input to the converter; and controlling, by the controller configured to control the signal (MWAKEUP), the driving of the converter. ### Claim 5 (depends on 4) The method of claim 4, further comprising: receiving, by the controller, information about a remaining charge amount of the battery from a remaining battery amount sensor configured to detect the remaining charge amount of the battery; and controlling, by the controller, the driving of the converter using the information about the remaining charge amount of the battery.