Abstract: The present invention relates to a battery management system and method. In some embodiments the battery management system includes a sensing unit and a micro controller unit (MCU). The sensing unit measures the current, the voltage and the temperature of a battery. The MCU receives the voltages, the currents, and the temperatures, calculates an estimated cell voltage, by applying a pack voltage sensing error and the cell voltage deviation to the cell voltages, and calculates an estimated cell resistance, by adding a pack assembly resistance to an internal resistance of the cell, and calculates an pack output of the battery by using the estimated cell voltage and the estimated cell resistance.

Abstract: A battery pack is constructed with a plurality of secondary batteries or a plurality of battery assemblies, each having a plurality of unit batteries, and at least one safety switch, which can facilitate precise measurement of the voltages of the plurality of secondary batteries or battery assemblies. The battery pack is constructed with a plurality of secondary batteries, at least one safety switch electrically connected between two adjacent batteries among the plurality of secondary batteries, and a plurality of sensing lines for measuring voltages of the plurality of secondary batteries. The quantity of the sensing lines is equals to a sum of the number of the secondary batteries, and the number of the safety switches, and plus one.

Abstract: In a battery management system and a driving method thereof, the system includes a sensor and a micro control unit (MCU). The sensor senses a voltage and a current of a battery, and generates an estimation current of the battery using a result of cumulatively calculating the battery current by a unit of a predetermined period. The MCU receives the battery voltage and the estimation current, sets a voltage of the battery in a key-on state as a first voltage, sets a voltage of the battery after a first period as a second voltage, and calculates an internal resistance of the battery using a difference between the first and second voltages and an average value of the estimation current.

Abstract: A battery management system and a driving method include a first switch coupled to an end of a resistor. When calculating an internal resistance of a battery, the first switch is turned on and the battery and the resistor are coupled in parallel. Then, the internal resistance of the battery is calculated by using a second current flowing to the battery and a first current flowing to the resistor.

Abstract: A battery management system and a driving method thereof includes a sensing unit and a micro control unit (MCU). The sensing unit measures a battery temperature and a battery current. The MCU receives the battery temperature and current, detects battery internal resistance corresponding to an estimated state of charge (SOC) and the battery temperature when the estimated SOC is included within an SOC area corresponding to the transmitted battery temperature, and estimates a battery state of health (SOH) by using the battery internal resistance. In the SOC area, a variation of the battery internal resistance is minimized.

Abstract: A battery management system to set an OCV setting of a battery, and a driving method thereof. The battery management system includes a sensing unit and a main control unit (MCU). The sensing unit measures a voltage of a battery. The MCU controls charging/discharging of the voltage of the battery, generates charge/discharge pulse pattern waveforms, measures and stores maximum and minimum voltages value of at least one pulse pattern among the charge/discharge pulse pattern waveforms, and sets an average of the measured voltage to an OCV setting from which an SOC is determined. The battery management system estimates the SOC while a vehicle is operating.

Abstract: A battery management system of a vehicle utilizing electrical energy and a driving method thereof is provided. The battery management system includes a sensing unit and a main control unit (MCU). The sensing unit detects voltage of a battery cell. MCU determines an operation state of a vehicle, and generates a sampling signal depending on the operation state of the vehicle. The sampling control signal transmits to the sensing unit, and controls the detection of the voltage of the battery cell. The operation state of the vehicle includes a running state and a stopping state.

Abstract: A sensing and control apparatus for a battery management system is provided. The sensing and control apparatus includes: a sensing unit and a main control unit. The sensing unit includes: a cell relay of a plurality of cell relays and a voltage detection unit. The cell relay is configured to be coupled to at least one of a plurality of cells. The voltage detection unit is coupled to a cell relay. The voltage detection unit is configured to: receive a reference voltage when each of the plurality of cell relays is turned off; and generate a second voltage by amplifying by a gain a first voltage that corresponds to the reference voltage. The main control unit is configured to calculate a valid gain corresponding to a ratio of the second voltage to the reference voltage when the temperature of the voltage detection unit is within a threshold temperature range.

Abstract: The present invention relates to a battery management system and method. In some embodiments the battery management system includes a sensing unit and an MCU. The sensing unit measures the current, the voltage and the temperature of a battery. The MCU receives the voltages, the currents, and the temperatures, calculates an estimated cell voltage, by applying a pack voltage sensing error and the cell voltage deviation to the cell voltages, and calculates an estimated cell resistance, by adding a pack assembly resistance to an internal resistance of the cell, and calculates an pack output of the battery by using the estimated cell voltage and the estimated cell resistance.

Abstract: A Battery Management System (BMS) and a battery management method include a sensing unit to measure a battery terminal voltage, current, and temperature, and a Main Control Unit (MCU) to compare the measured battery terminal voltage, current, and temperature to a State of Charge (SOC) reset condition and to reset a battery estimate SOC according to the comparison result. The MCU resets the battery estimate SOC to a first reset SOC when the SOC reset condition corresponds to a first SOC and reset the battery estimate SOC at a second reset SOC when the SOC reset condition corresponds to a second SOC.

Abstract: A Battery Management System (BMS) includes a sensing unit and a Micro Control Unit (MCU). The sensing unit measures a battery current, a battery voltage, and a battery temperature. The MCU determines a State of Charge (SOC) reset point based on the measured battery current and voltage. The BMS determines a battery overcharge state using a current integration result after the SOC reset point is reached. The MCU includes an SOC calculator and a full charge determining unit. The SOC calculator transmits a present current integration value upon detecting the SOC reset point.

Abstract: A battery management system and method. The battery management system manages a battery of a hybrid vehicle including a motor, a battery, and a main switch connecting the motor and the battery. The battery management system includes a sensing unit and an MCU. The sensing unit measures the current, the voltage and the temperature of the battery. The MCU integrates the battery current to produce an integrated current value, and determines whether the battery is overcharged or over discharged using the integrated current value.

Abstract: Battery management system and a driving method thereof including a sensing unit and an MCU. The sensing unit measures a battery current and a battery voltage. The MCU sets an OCV during a no-load state period at time increments measured from the beginning of the no-load state period, and estimates an SOC corresponding to the set OCV.

Abstract: A battery management system and a driving method thereof. The battery management system manages a plurality of battery cells, and a plurality of cell relays respectively coupled to the plurality of cells. The battery management system includes a voltage detecting unit and an MCU. The voltage detecting unit receives a first voltage corresponding to an input voltage transmitted through a 3-contact relay coupled to a first cell corresponding to the turn-on first cell relay when the first cell relay is turned on, and generating a second voltage corresponding to the first voltage. The MCU calculates an effective gain in correspondence with a ratio of the second voltage to the input voltage and controls a connection of the 3-contact relay.

Abstract: A battery management system to estimate a state of charge of a battery and a driving method thereof includes a sensing unit and a micro control unit. The sensing unit measures a battery voltage. The MCU measures a first time and a second time, detects first and second battery voltages that respectively correspond to the first and second times from the battery voltage, estimates an open circuit voltage by the first and second voltages, and establishes the SOC that corresponds to the OCV.

Abstract: A battery management system for managing a battery including a plurality of battery cells and a driving method are provided. The system includes a sensor, and a main control unit (MCU). The sensor senses a voltage and a current of the battery. The MCU receives the voltage and the current of the battery, measures an open circuit voltage (OCV) in key-on using the battery voltage, and estimates an initial SOC depending on the OCV in the key-on. The MCU divides the OCV into first and second OCV regions, and, when the OCV in the key-on is in the first OCV region, estimates the initial SOC using a linear equation.

Abstract: A battery management system (BMS) manages a battery for a hybrid vehicle including an engine control unit and a motor generator controlled by the engine control unit and connected to a battery including at least one battery pack, each pack including a plurality of battery cells. The BMS includes a sensor and an MCU unit. The sensor detects temperature, current, and open circuit voltage (OCV) of the battery. The MCU receives the detected temperature, current, and OCV, calculates a key-off time period which is a period between a time point when a battery key-on state ends and a time point when a subsequent battery key-on state begins, calculates an OCV error range corresponding to an SOC error range detected at the key-off time point, and infers an initial SOC of the battery.