Abstract: A battery system includes: at least two battery packs; a plurality of first relays, each first relay being connected to a respective one of the at least two battery packs; and an auxiliary battery, a first battery pack among the at least two battery packs with a highest voltage is discharged to the auxiliary battery through the first relay connected to the first battery pack so that a voltage of the first battery pack approaches a voltage of another battery pack, a second battery pack with a lowest voltage is charged by the auxiliary battery through the first relay connected to the second battery pack so that the voltage of the second battery pack may approach the voltage of the another battery pack, and the at least two battery packs are connected in parallel.

Abstract: The present invention relates to a wireless communication method in a battery pack and a master BMS for providing the method.

Abstract: The present invention relates to a wireless communication method in a battery pack and a master BMS for providing the method.

Abstract: A battery management apparatus includes an SOC calculation unit to calculate an SOC of a battery module by using at least one of voltage, current, or temperature measured for the battery module in which a plurality of battery cells are connected in parallel, an SOH calculation unit to calculate an SOH of the battery module based on at least one of the SOC calculated by the SOC calculation unit and the voltage, current, or temperature of the battery module, and a diagnosis unit to calculate a change rate of an SOH using the SOH, and diagnose a state of the battery module using the calculated SOH change rate. The state of the battery module is any one of a normal state, a state including a degenerate battery cell, or a state including a current interrupt device (CID) open battery cell.

Abstract: A battery balancing apparatus according to an embodiment of the present disclosure includes a first selection unit to selectively connect each of a plurality of batteries included in a first battery group between a first node and a second node, a resistance adjustment unit to connect a first resistor, a second resistor, a series circuit of the first and second resistors or a parallel circuit of the first and second resistors between the first node and the second node, and a control unit. The control unit determines at least one of the batteries as a first balancing target based on a first voltage signal indicating voltage of each battery. The first selection unit connects the first balancing target between the first node and the second node. The control unit controls the resistance adjustment unit based on a voltage difference between voltage of the first balancing target and a reference voltage.

Abstract: The present invention relates to a wireless communication method in a battery pack and a master BMS for providing the method.

Abstract: The present invention relates to a wireless communication method in a battery pack and a master BMS for providing the method.

Abstract: A method of assigning a communication ID and a battery pack providing the method are disclosed. The battery pack may include: a plurality of slave BMSs to manage a plurality of battery modules having a plurality of battery cells; and a master BMS to control the slave BMSs to charge the battery modules after a predetermined battery module is discharged, and to receive data for each battery cell indicating a first cell voltage before the charging and a second cell voltage after the charging. The master BMS may determine a battery module including a low-voltage battery cell having the second cell voltage lower than the first cell voltage as a battery module located at a higher potential adjacent to the discharged battery module and estimate a connection order of the battery modules, and may assign a communication ID of each of the slave BMSs based on the estimated connection order.

Abstract: An apparatus for calculating battery resistance according to an embodiment of the present invention can include a measurement circuit connected between one terminal among a positive (+) terminal and a negative (?) terminal of a battery pack and a chassis, a voltage measurement unit that measures a voltage from the measurement circuit, and an insulation resistance calculation unit that calculates insulation resistance of the battery pack based on the voltage measured by the voltage measurement unit. When the calculated insulation resistance is less than a preset threshold, the insulation resistance calculation unit can recalculate the insulation resistance based on an amount of change in voltage of the battery pack over time.

Abstract: Discussed is a system for managing a state of a battery, the system including: a user terminal to set location information about a location at which the battery is stored and output the set location information; a battery information obtaining device connected to the battery and to obtain battery information including at least one of voltage, SOC, and SOH of the battery and output the obtained battery information; and a performance detecting device connected to the user terminal to receive the set location information, connected to the battery information obtaining device to receive the obtained battery information, and to determine a target location at which the battery is stored, obtain environment information of the determined target location, set reference state information of at least one reference cell stored around the determined target location, and detect performance of the battery.

Abstract: An apparatus including a monitoring unit including a voltage detection circuit which detects a voltage of the plurality of battery cells, a balancing unit including a first common resistor element and a switching module, the first common resistor element connected between a first common node and a second common node, and a control unit operably coupled to the monitoring unit and the switching module, the control unit determining a balancing target including at least one of the plurality of battery cells based on the voltage of each of the plurality of battery cells, controlling the switching module to form a current channel between the first common resistor element and the balancing target and determining a maximum number of battery cells that can be included in the balancing target based on resistance of the first common resistor element and the voltage of each of the plurality of battery cells.

Abstract: The present invention relates to a wireless communication method in a battery pack and a master BMS for providing the method.

Abstract: Discussed is an application that efficiently utilizes a vehicle battery by predicting performance of the vehicle battery and an available driving distance based on environmental condition of an area where a vehicle is parked and state information of the vehicle battery.

Abstract: A battery management apparatus includes an SOC calculation unit to calculate an SOC of a battery module by using at least one of voltage, current, or temperature measured for the battery module in which a plurality of battery cells are connected in parallel, an SOH calculation unit to calculate an SOH of the battery module based on at least one of the SOC calculated by the SOC calculation unit and the voltage, current, or temperature of the battery module, and a diagnosis unit to calculate a change rate of an SOH using the SOH, and diagnose a state of the battery module using the calculated SOH change rate. The state of the battery module is any one of a normal state, a state including a degenerate battery cell, or a state including a current interrupt device (CID) open battery cell.

Abstract: A battery system includes: at least two battery packs; a plurality of first relays, each first relay being connected to a respective one of the at least two battery packs; and an auxiliary battery, a first battery pack among the at least two battery packs with a highest voltage is discharged to the auxiliary battery through the first relay connected to the first battery pack so that a voltage of the first battery pack approaches a voltage of another battery pack, a second battery pack with a lowest voltage is charged by the auxiliary battery through the first relay connected to the second battery pack so that the voltage of the second battery pack may approach the voltage of the another battery pack, and the at least two battery packs are connected in parallel.

Abstract: The present disclosure relates to an apparatus for predicting the state of a battery including a first communication unit for receiving data on the temperature, current, and voltage of a plurality of battery cells measured in a battery management system included in a battery pack and receiving, from a vehicle using a corresponding battery cell, first environmental information on an environment in which the vehicle is traveling and a second communication unit for receiving, from an external server, experimental data on the state of the battery cell or the battery pack in various environments, and a battery state prediction unit for predicting the state of a battery by using the received data on the temperature, current, and voltage of each of the plurality of battery cells, the first environmental information, and the state environmental information, wherein the state of the battery includes a battery cell charge state and a battery cell degradation state.

Abstract: An apparatus including a monitoring unit including a voltage detection circuit which detects a voltage of the plurality of battery cells, a balancing unit including a first common resistor element and a switching module, the first common resistor element connected between a first common node and a second common node, and a control unit operably coupled to the monitoring unit and the switching module, the control unit determining a balancing target including at least one of the plurality of battery cells based on the voltage of each of the plurality of battery cells, and controlling the switching module to form a current channel between the first common resistor element and the balancing target.

Abstract: An apparatus including a monitoring unit including a voltage detection circuit which detects a voltage of the plurality of battery cells, a balancing unit including a first common resistor element and a switching module, the first common resistor element connected between a first common node and a second common node, and a control unit operably coupled to the monitoring unit and the switching module, the control unit determining a balancing target including at least one of the plurality of battery cells based on the voltage of each of the plurality of battery cells, and controlling the switching module to form a current channel between the first common resistor element and the balancing target.

Abstract: A system and a method of diagnosing a contactor through a sound sensor, which determines whether a contactor is erroneously operated based on a result of sensing a mechanical transition sound generated during an on/off operation of the contactor. The contactor diagnosis may be applied to a battery management system and may further include counting the number of transition operations of the contactor and/or may be used for diagnosing the life of the contactor.

Abstract: An off-prevention circuit has a battery management system and a contactor multi-connected via a plurality of positive electrode terminals and a plurality of negative electrode terminals provided in each of the battery management system and the contactor. Even when any one connection among the connections of the plurality of positive electrode terminals and the plurality of negative electrode terminals is disconnected or opened, it is possible to maintain supply of power supplied from the battery management system to the contactor through another connection of the positive electrode terminal and the negative electrode terminal.