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 ofpower supplied from the battery management system to the, contactor through another connection of the positive electrode terminal and the negative electrode terminal.

Abstract: The present invention relates to an insulation resistance measuring system and device which calculate resistance values of the positive electrode insulation resistance and the negative electrode insulation resistance by using convergence values of the first voltage and the second voltage, in order to measure the positive electrode insulation resistance and the negative electrode insulation resistance connected to both terminals of a battery pack with a capacitor, respectively.

Abstract: Provided is an apparatus for assigning identification information to a plurality of slave battery management units. The apparatus assigns different identification information to a plurality of slave battery management units. The apparatus includes: a casing jig configured to at least partially cover the plurality of slave battery management units; a wireless communication unit including a plurality of antennas disposed so as to correspond one-to-one to the plurality of slave battery management units; and a controller configured to control the wireless communication unit so as to transmit a wireless signal including different identification information to the plurality of slave battery management units.

Abstract: An apparatus and a method of equalizing a battery module supplies an equalization current to a battery module which is diagnosed to have abnormality via an equalization current supply circuit when an abnormality is generated in a state of charge (SoC) of one or more battery modules, and equalize the SoC of the one or more battery modules.

Abstract: A battery module equalization apparatus according to the present disclosure includes a plurality of slave controllers each electrically connected to the plurality of battery modules to measure voltage values of the plurality of battery modules, and having a slave charging/discharging channel through which the current that charges and discharges each battery module flows, and a master controller that receives the voltage value of each battery module from the plurality of slave controllers, selects at least one of the plurality of slave controllers based on the received voltage value, and transmits a CHARGE or DISCHARGE command to the at least one selected slave controller, and having a master charging/discharging channel through which the charging current supplied to the at least one slave controller and the discharging current supplied from the at least one slave controller flow.

Abstract: Disclosed is a balancing apparatus capable of performing balancing without wasting power and of rapidly transmitting power.

Abstract: The present invention relates to a battery cell balancing system and method using LC resonance. The present invention comprises: a drive unit including one or more battery cells connected in series, a resonance module for performing a resonant operation, and a switch unit provided so as to allow electric charges stored in the resonance module to be transferred to each of the one or more battery cells; and a control unit for measuring a resonance period of the resonance module according to a voltage state of each of the one or more battery cells, and transferring the electric charges charged in the resonance module to each of the one or more battery cells by controlling an on/off operation of the switch unit according to the measured resonance period.

Abstract: A battery pack management device capable of reducing power consumption while transmitting and receiving data between a master BMS and a slave BMS by using a wireless communication method. The battery pack management device according to the present disclosure includes: a master BMS including an external communicator, an internal communicator, and a master controller and a slave BMS including a power supply, a state measurement sensor, a slave wireless communicator, and a slave controller.

Abstract: An apparatus and a method for measuring insulation resistance of a battery pack using an insulation resistance meter (IRM) circuit where only a negative relay is electrically conducted, thereby decreasing a risk of electric shock when insulation resistance is measured in a state where an external insulation resistor of the battery pack is broken.

Abstract: A wireless battery management system includes a plurality of slave BMSs coupled to a plurality of battery modules in one-to-one correspondence. Each slave BMS is configured to operate in active mode and sleep mode. Each slave BMS is configured to wirelessly transmit a detection signal indicating a state of the battery module. The wireless battery management system further includes a master BMS configured to wirelessly receive the detection signal from each of the plurality of slave BMSs. The master BMS is configured to set a scan cycle and a scan duration for each of the plurality of slave BMSs based on the detection signal, and wirelessly transmit a control signal to the plurality of slave BMSs. The control signal includes a wireless balancing command indicating the scan cycle and the scan duration set for each of the plurality of slave BMSs.

Abstract: The present disclosure discloses a battery device including a battery, a charging and discharging switch unit configured to control charging and discharging of the battery, a pre-charging unit configured to be charged during discharging of the battery, and a discharging unit configured to discharge the charge charged in the pre-charging unit.

Abstract: An insulation resistance calculation apparatus according to an embodiment of the present disclosure includes a switching unit including a first switch and a second switch that are independently controlled, a first protective resistor and a first reference resistor connected in series between a positive electrode terminal of a battery and a ground when the first switch is turned on, a second protective resistor and a second reference resistor connected in series between a negative electrode terminal of the battery and the ground when the second switch is turned on, a voltage measuring unit configured to measure a first detection voltage applied to the first reference resistor and a second detection voltage applied to the second reference resistor, and a processor configured to determine if a measurement error occurred in measured values of the first detection voltage and measured values of the second detection voltage.

Abstract: The present invention relates to a current measurement apparatus using a shunt resistor, and a current measurement apparatus using a shunt resistor, in which two or more busbar-type components, to which one shunt resistor is applied, in the related art are integrated into one busbar module, and a voltage of a battery module is measured through the plurality of shunt resistors included in the one integrated busbar module, thereby decreasing volumes and price of the battery module and a battery pack, and the plurality of shunt resistors is measured through the plurality of measuring units, respectively, thereby measuring a reliable voltage value.

Abstract: An insulation resistance measuring device including a positive electrode test resistor connected to a positive electrode node of a battery assembly, a negative electrode test resistor connected to a negative electrode node of the battery assembly, a first switch connecting the positive electrode node of the battery assembly to the positive electrode test resistor, a second switch connecting the negative electrode node of the battery assembly to the negative electrode test resistor, a voltage measurement unit that measures a first voltage applied to the positive electrode test resistor and a second voltage applied to the negative electrode test resistor, and a voltage estimation unit that estimates a final convergence value of the first and second voltages.

Abstract: The present invention relates to an insulation resistance measuring system and device which calculate resistance values of the positive electrode insulation resistance and the negative electrode insulation resistance by using convergence values of the first voltage and the second voltage, in order to measure the positive electrode insulation resistance and the negative electrode insulation resistance connected to both terminals of a battery pack with a capacitor, respectively.

Abstract: Provided are switch deterioration detection device and method. More particularly, the switch deterioration detection device includes: a resistor serially connected with a battery in which charge and discharge are controlled through a switch; a first differential amplifier configured to amplify a voltage difference between both ends of the switch to output the amplified voltage difference as a first output voltage; a second differential amplifier configured to amplify a voltage difference between both ends of the resistor to output the amplified voltage difference as a second output voltage; a comparator configured to compare levels between the second and second output voltages; and a controller configured to determine whether the switch deteriorates based on the compared result of the comparator.

Abstract: Disclosed is a balancing apparatus capable of performing balancing without wasting power and of rapidly transmitting power.

Abstract: The overvoltage protection circuit according to an embodiment of the present invention includes: a voltage measurement unit for measuring the voltage of a battery; a power control unit that supplies power if the battery voltage value measured in the voltage measurement unit is equal to or greater than a first predetermined voltage value; and a cut-off circuit unit that receives power supplied from the power control unit and cuts off the charge of the battery if the voltage value of the battery is equal to or greater than a second predetermined voltage value that is higher than the first voltage value.

Abstract: The present disclosure discloses a battery device including a battery, a charging and discharging switch unit configured to control charging and discharging of the battery, a pre-charging unit configured to be charged during discharging of the battery, and a discharging unit configured to discharge the charge charged in the pre-charging unit.

Abstract: The present invention relates to a battery cell balancing system and method using LC resonance. The present invention comprises: a drive unit including one or more battery cells connected in series, a resonance module for performing a resonant operation, and a switch unit provided so as to allow electric charges stored in the resonance module to be transferred to each of the one or more battery cells; and a control unit for measuring a resonance period of the resonance module according to a voltage state of each of the one or more battery cells, and transferring the electric charges charged in the resonance module to each of the one or more battery cells by controlling an on/off operation of the switch unit according to the measured resonance period.