Lg Energy Solution, Ltd.

Lg Chem, Ltd

Hyeon Jin Song

Yanglim Choi

Chang Bog Lee

Jae C Lee

Sung Won Kim

Wontae Lee

Wongon Kim

Solji Yoo

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.

Battery system thermal event detection method and battery system using the same

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.

Device and method for blocking current using disconnector

A battery cell tray includes a lower tray which has an open upper portion, in which a plurality of battery cells are seated, and which has openings through which leads of both ends of the battery cell are exposed at both sides of the lower tray; an upper tray which has an open lower portion and which covers and is coupled to the lower tray; lead connectors installed on both sides of the upper tray and coupled to the leads of both ends of the battery cell; an electric wire connecting the lead connectors on both sides; and an instrument for measuring an electrical characteristic of the battery cell that is coupled to the electric wire.

Battery cell tray

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.

Battery module and energy storage device

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.

Battery charging system and battery charging method

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.

Apparatus and method for determining error of a battery cell

The present invention relates to a system and a method for protecting a circuit between batteries, in which counter-electromotive force generated from the lead-storage battery is prevented from being applied to a MOSFET switch when power is cut off through the MOSFET switch in a circuit in which a vehicle lead-storage battery and a lithium polymer battery are connected to each other to prevent the MOSFET switch from overcurrent and prevent current, which leaks from the lead-storage battery when the lead-storage battery is charged, from being conducted to a path other than a determined path in advance.

System and method for protecting inter-battery circuit by using free wheeling path

The present invention relates to an apparatus and a method for protecting a MOSFET relay by using a voltage detector and a signal fuse, which calculate a detection voltage value through a voltage detector from an electrically conducted current value of a MOSFET relay provided in a battery main circuit for a vehicle and pre-block current applied to the MOSFET relay by operating a signal fuse when the calculated voltage value is more than a predetermined threshold to protect the MOSFET relay from being burned.

Apparatus and method for protecting MOSFET relay by using voltage detector and signal fuse

The present invention relates to a system and a method for independently controlling a relay using bimetal which allow bimetal to operate based on a signal output from a micro controller unit when current of a predetermined threshold or more flows on a circuit to allow current which flows between a battery and the relay to flow bypassing the bimetal to independently control the relay regardless of whether a circuit pattern is abnormal.

System and method for independently controlling relay, using bimetal

The present invention relates to a transformer relay and a battery voltage measurement system using the same and the transformer relay includes: a transformer transforming voltage of a voltage measurement signal according to a wiring ratio of a first wiring and a second wiring; and a relay transferring voltage of a battery while an operation state is changed to an On state when the transformed voltage of the voltage measurement signal is input and the battery voltage measurement system using the transformer relay, includes: the transformer; and a measurement unit measuring a battery voltage value by receiving the voltage of the battery from the relay.

Transformation relay and battery voltage measurement system using same

The present invention relates to a system and a method of connecting a battery, which include a relay unit connected to a battery by a current, and allow a current with a different intensity to flow in the relay unit according to whether force applied to a circuit from the outside is detected and a size of the detected force, thereby maintaining or blocking the connection of the relay unit to the battery in consideration of the detection of the force and the degree of danger of the detected force.

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Daejeon, South Korea

Hyeon Jin Song