Abstract: A battery management apparatus according to an embodiment disclosed herein includes a sensor configured to measure a voltage of each of a plurality of battery banks and a controller configured to calculate a first respective voltage, which is a respective voltage variance of each of the plurality of battery banks in a specific period, calculate a second respective voltage of each of the plurality of battery banks based on a maximum value among first voltages of the plurality of battery banks and an average of the first voltages of the plurality of battery banks, and process at least one battery bank among the plurality of battery banks diagnosed based on an average of second voltages of the plurality of battery banks and the second respective voltage of the one battery bank.

Abstract: A battery management apparatus includes an information obtaining unit configured to obtain an open circuit voltage of a plurality of battery cells and a controller configured to calculate a first voltage of each of the plurality of battery cells, which is related to a change in open circuit voltage of the plurality of battery cells, for a preset time, calculate a second voltage that is an average of the first voltage of each of the plurality of battery cells, calculate a deviation based on a first voltage and a second voltage of each of the plurality of battery cells, and diagnose the plurality of battery cells based on a ratio of the first voltage and the second voltage of each of the plurality of battery cells and the deviation.

Abstract: A battery performance diagnosis apparatus according to an embodiment disclosed herein includes memory and one or more processors configured to generate a diagnosis command for diagnosing a first channel among a plurality of channels of a charger/discharger, data, when a battery is inserted into the first channel obtain a stream of measurement information regarding the battery during charging or discharging of the battery by using the charger/discharger, diagnose performance of the battery based on the measurement information, and store the diagnosed performance.

Abstract: A battery apparatus estimates a surface SOC representing a potential at an electrode surface of the battery, and predicts an output of the battery during a requested time based on the first surface SOC, a cut-off voltage, and the requested time.

Abstract: A method of predicting a maximum discharge current for a battery cell includes: receiving a discharge time and a discharge limitation voltage; setting a discharge reference voltage; obtaining a proportional constant and an index parameter corresponding to the discharge reference voltage, wherein the proportional constant and the index parameter are applied to a relation between a constant current and a discharge time during a discharge; calculating a constant current for the discharge time by using the proportional constant and the index parameter; and adjusting the discharge reference voltage when a difference between a temporary discharge limitation voltage at which a voltage due to the constant current and an internal resistance of the battery cell is dropped from the discharge reference voltage and the discharge limitation voltage deviates from a predetermined error.

Abstract: A battery management system includes: a voltmeter that measures a voltage of each of a plurality of battery banks; and a controller. The controller selects a first value based on the first value, which is a voltage variation amount of each of the plurality of battery banks during a predetermined time interval, and a second value, which is a standard deviation of a voltage variation amount of each of the plurality of battery banks per unit time; ranks the plurality of battery banks based on a first reference value, which is a ratio of the selected first value to an average value of the selected first value; and diagnoses an abnormality of at least one battery bank among the plurality of battery banks at a designated time point based on the ranked plurality of battery banks.

Abstract: A method for predicting a constant current discharge graph for a battery cell according to one feature of the invention includes: measuring a first time required for the battery cell voltage to decrease to a first discharge limit voltage by a first constant current discharge; measuring a second time required for the battery cell voltage to decrease to a second discharge limit voltage by a second constant current discharge; and calculating a proportional constant and an index parameter in the relationship between the constant current and the discharge time during a discharging based on the first constant current and the first time, and the second constant current and the second time.

Abstract: A method of predicting a maximum discharge current for a battery cell includes: receiving a discharge time and a discharge limitation voltage; setting a discharge reference voltage; obtaining a proportional constant and an index parameter corresponding to the discharge reference voltage, wherein the proportional constant and the index parameter are applied to a relation between a constant current and a discharge time during a discharge; calculating a constant current for the discharge time by using the proportional constant and the index parameter; and adjusting the discharge reference voltage when a difference between a temporary discharge limitation voltage at which a voltage due to the constant current and an internal resistance of the battery cell is dropped from the discharge reference voltage and the discharge limitation voltage deviates from a predetermined error.

Abstract: A battery apparatus estimates a surface SOC representing a potential at an electrode surface of the battery, and predicts an output of the battery during a requested time based on the first surface SOC, a cut-off voltage, and the requested time.

Abstract: Disclosed are a battery charging system and method. The battery charging system according to the present invention includes a first connector connected to both ends of a battery of a charging providing car; a second connector connected to both ends of a battery of a charging target car; a converter configured to convert a voltage transmitted from the battery of the charging providing car through the first connector and transmit the converted voltage to the battery of the charging target car through the second connector; and a controller connected to each of a battery management system (BMS) of the charging providing car and a BMS of the charging target car to control a voltage conversion ratio of the converter based on a state information on each of the batteries transmitted from each of the BMSs.

Abstract: Embodiments of the present invention relate to a non-contact power transmission device, a magnetic induction-type power supply device, a magnetic induction-type power collector, and a moving object using same.

Abstract: Disclosed are a battery charging system and method. The battery charging system according to the present invention includes a first connector connected to both ends of a battery of a charging providing car; a second connector connected to both ends of a battery of a charging target car; a converter configured to convert a voltage transmitted from the battery of the charging providing car through the first connector and transmit the converted voltage to the battery of the charging target car through the second connector; and a controller connected to each of a battery management system (BMS) of the charging providing car and a BMS of the charging target car to control a voltage conversion ratio of the converter based on a state information on each of the batteries transmitted from each of the BMSs.