Abstract: The present disclosure relates to a battery, and more particularly to a battery electrode. According to some implementations of the present disclosure, a method for manufacturing a battery electrode includes: forming a mixture of a polymer powder and an active material into a fiber; weaving the fiber into a woven film; and carbonizing the woven film.

Abstract: A battery charging system including a first battery pack having a first battery that is charged in a non-contact connection; a second battery pack having a second battery that is charged in a non-contact connection, a first capacitor connected in series between positive and negative poles of the second battery, and a first BMS configured to measure a voltage of the second battery and voltages of both ends the first capacitor; and the first BMS charges the second battery with the voltage of the first battery when the first battery voltage is higher than the second battery voltage, and charges the first battery with the voltage of the second battery when the first battery voltage is lower than the second battery voltage.

Abstract: The present disclosure relates to an anode for a lithium secondary battery, wherein an anode material layer is formed on at least one surface of an anode current collector, and the anode material layer includes large-particle graphite, a small-particle silicon-based material, and fine-particle graphite, and satisfies the following conditions 1 to 3: [Condition 1] Average diameter D50 of the large-particle graphite (D1): 1 to 50 ?m [Condition 2] Average diameter D50 of the small-particle silicon-based material (D2): 0.155D1 to 0.414D1 [Condition 3] Average diameter D50 of the fine-particle graphite (D3): 0.155D1 to 0.414D1, or 0.155D2 to 0.414D2.

Abstract: A cell tray is for accommodating or storing cylindrical cells in a charge/discharge process for activation or an aging process, or for transporting the cylindrical cells between each process. More specifically, the cell tray includes a tray body accommodating multiple cylindrical cells and has an opened top, a first connector installed on the tray body in order to be able to rotate toward the upper electrode tab of the cylindrical cell, a second connector installed in the lower part of the lower electrode tab of the cylindrical cell, and an electrical characteristic measuring device that is electrically connected to the first connector and the second connector that measures the electrical characteristics of the cylindrical cell.

Abstract: A battery management apparatus includes a measuring unit configured to measure a voltage of each of a plurality of battery cells, a converter connected to corresponding battery cells among the plurality of battery cells and configured to form a charge and discharge path between the connected battery cells according to an operation state of a switch included therein, and a control unit configured to receive a voltage value of each of the plurality of battery cells from the measuring unit, control the operation state of the switch included in the converter, calculate a voltage change rate of a charging cell charged by the converter according to the control of the operation state of the switch, and determine whether the charging cell is degraded based on the calculated voltage change rate.

Abstract: A battery cell error determining apparatus including: a magnetic field measurement unit configured to measure a magnetic field generated by a current flowing in a battery cell, and a control unit configured to calculate a capacity of the battery cell by using a current calculated by the magnetic field measured by the magnetic field measurement unit. The control unit determines an error of the battery cell by using the capacity of the battery cell.

Abstract: A battery system includes a battery pack including a plurality of battery cells a pressure sensor located inside the battery pack to measure an internal pressure of the battery pack every sampling cycle; and a battery management system calculating a reference pressure based on an average of internal pressures measured at sampling cycles for a sampling period, calculating a pressure fluctuation amount based on a difference of the internal pressure measured every sampling cycle from the reference pressure, and determining that a thermal event has occurred in the battery pack if the internal pressure measured every sampling cycle increases consecutively at least two times when the pressure fluctuation amount is greater than or equal to a predetermined threshold pressure.

Abstract: A current measurement apparatus configured to quickly block current. The current measurement apparatus includes a first terminal, a second terminal, a resistor interposed in a separated space between the first terminal and the second terminal; a circuit board, a control unit mounted on the circuit board and configured to measure a current flowing in the resistor by using a voltage value between the first terminal and the second terminal and a resistance value of the resistor, and a cutting unit located above or below the resistor and configured to cut the resistor according to a control signal of the control unit.

Abstract: A venting device is provided at one side of a battery pack to discharge a venting gas generated in an inner space of the battery pack to the outside. The venting device includes a cylinder block configured to communicate with the inside of the battery pack and a venting gas flow path for discharging the venting gas to the outside, a piston assembly configured to move upward along an extension direction of the cylinder block by receiving a force caused by the increase of the internal pressure of the battery pack so that the inner space of the battery pack communicates with the venting gas flow path and a magnet unit installed in the cylinder block and configured to restrict upward movement of the piston assembly by a magnetic force so that the communication between the venting gas flow path and the inner space of the battery pack is blocked.

Abstract: A battery module in an energy storage device used with a plurality of battery modules in a battery rack and including a rack fuse that cuts off a circuit when an overcurrent occurs includes a battery cell and a module fuse for cutting off a circuit when overcurrent occurs, the module fuse starts to melt later than a melting completion time point of the rack fuse.

Abstract: A battery including a swelling sensing unit. The battery includes a case and an electrode assembly in the case. The battery further includes a film on a surface of the battery. The film includes a predetermined amount of elasticity or having substantially no elasticity.

Abstract: A battery module and an energy storage device including a battery rack including a plurality of battery modules, and a rack fuse cutting off a circuit when an overcurrent occurs in the battery rack, each of the plurality of battery modules includes a battery cell and a module fuse that cuts off a circuit when an overcurrent occurs in the battery module, the module fuse has a voltage specification capable of corresponding to an output voltage of the battery rack, and has a short circuit specification lower than a short circuit specification of the rack fuse.

Abstract: A battery pack, which may accurately detect swelling of a battery cell according to a situation. The battery pack includes a battery cell having an electrode assembly, an electrolyte, a battery case and an electrode terminal; a deformation measuring unit at least partially attached to an outer surface of the battery case of the battery cell and configured to measure whether the battery case is deformed; an impedance measuring unit connected to the electrode terminal of the battery cell and configured to measure impedance inside the battery cell; and a control unit configured to determine whether the battery cell is swelled by using a deformation measurement result of the deformation measuring unit and an impedance measurement result of the impedance measuring unit.

Abstract: An energy storage system (ESS) including a plurality of battery modules and a battery protection unit, the battery protection unit includes a microcontroller (MCU) for controlling charge and discharge of the ESS, a first main contactor and a second main contactor connecting or disconnecting between the plurality of battery modules and an output terminal of the ESS under control of the MCU, and a disconnector disposed between the first main contactor and the second main contactor and connecting or disconnecting the plurality of battery modules, the first main contactor, and the second main contactor, the first main contactor and the second main contactor are turned on or off, by the MCU, depending on whether a predetermined voltage is applied.

Abstract: A switch diagnosing apparatus and method capable of effectively diagnosing a charging switch and a discharging switch provided to a battery pack. It is possible to effectively diagnose the state of a switch as at least one of a normal state, an open stuck state, a closed stuck state and a drift state, thereby improving the diagnosing efficiency.

Abstract: A battery management apparatus includes: an inverter connected to a battery cell and configured to convert a DC current output from the battery cell into an AC current according to an operation state of a plurality of switches provided therein; a measuring unit connected to a diagnosis line at which the AC current converted by the inverter is output, the measuring unit being configured to measure a voltage of the diagnosis line and output the measurement result; and a control unit having a plurality of capacitors connected to the diagnosis line and configured to control the operation state of the plurality of switches, receive the measurement result output from the measuring unit and diagnose a state of the plurality of capacitors based on the received measurement result.

Abstract: A battery management apparatus includes a measuring unit configured to measure a voltage of each of a plurality of battery cells, a converter connected to corresponding battery cells among the plurality of battery cells and configured to form a charge and discharge path between the connected battery cells according to an operation state of a switch included therein, and a control unit configured to receive a voltage value of each of the plurality of battery cells from the measuring unit, control the operation state of the switch included in the converter, calculate a voltage change rate of a charging cell charged by the converter according to the control of the operation state of the switch, and determine whether the charging cell is degraded based on the calculated voltage change rate.

Abstract: A venting device is provided at one side of a battery pack to discharge a venting gas generated in an inner space of the battery pack to the outside. The venting device includes a cylinder block configured to communicate with the inside of the battery pack and a venting gas flow path for discharging the venting gas to the outside, a piston assembly configured to move upward along an extension direction of the cylinder block by receiving a force caused by the increase of the internal pressure of the battery pack so that the inner space of the battery pack communicates with the venting gas flow path and a magnet unit installed in the cylinder block and configured to restrict upward movement of the piston assembly by a magnetic force so that the communication between the venting gas flow path and the inner space of the battery pack is blocked.

Abstract: A battery cell error determining apparatus including: a magnetic field measurement unit configured to measure a magnetic field generated by a current flowing in a battery cell, and a control unit configured to calculate a capacity of the battery cell by using a current calculated by the magnetic field measured by the magnetic field measurement unit. The control unit determines an error of the battery cell by using the capacity of the battery cell.

Abstract: Provided is a power supply circuit for energy transfer between a battery and a smoothing capacitor, a battery management system and a battery pack. The power supply circuit includes a transformer including a first winding and a second winding, a first switching circuit including a first switch connected in series to the first winding, and connected in parallel to the battery together with the first winding, a second switching circuit including a second switch connected in series to the second winding, and connected in parallel to the smoothing capacitor together with the second winding, and a switch controller. To pre-charge the smoothing capacitor, the switch controller is configured to perform a first operation of turning on the first switch and turning off the second switch, and subsequently perform a second operation of turning off the first switch and turning on the second switch.