Lg Energy Solution, Ltd.

Lg Chem, Ltd

Silicon Works Co., Ltd.

Kyoung Choon Min

Ki Young Lee

Jin Hee Jeon

Jae Wan Kim

Kyu Ho Kim

Won Gon Kim

Il Kwon Kim

Ki Suk Cho

Myoung Su Song

Seung Jun Choi

Hye Yun Bae

Jin Yong Jeon

Discussed is a battery pack diagnosis method including a battery pack manufacturing process, a battery cell charging and discharging process, a battery pack thermal image photographing process, a thermal image reading process, a battery pack magnetic field image photographing process, a magnetic field image reading process, and a wire bonding state defect determining process of finally determining a bonding state of a battery cell and a wire by combining thermal image reading result information obtained in the thermal image reading process and magnetic field image reading result information obtained in the magnetic field image reading process in order to exactly diagnose the bonding state of the battery cell and the wire connecting the battery cell in the battery pack.

Method for diagnosing battery pack

A battery management system of a battery cell assembly including a plurality of cells, includes a plurality of first cell balancing resistors and a plurality of first cell balancing switches connected between a positive electrode and a negative electrode of a corresponding first cell among the plurality of cells; and a plurality of second cell balancing resistors and a plurality of second cell balancing switches connected between the positive electrode and the negative electrode of the corresponding first cell, wherein a first cell balancing current flowing during an on period of each first cell balancing switch is greater than a second cell balancing current flowing during an on period of each second cell balancing switch.

Battery management system for adjusting cell balancing current

Disclosed are a communication method between a master controller and slave controllers, a slave controller for the communication method, and a battery management system using the communication method and the slave controller, in which the master controller receives safety information about battery cells through a plurality of channels even when each of a plurality of slave controllers includes only one micro controller unit, thereby minimizing the increase in the cost and enhancing the safety of the battery management system. The communication method includes performing bidirectional communication between a master controller and first to N(where N is an integer equal to or more than two) slave controllers through a first communication channel, and receiving, by the master controller, an indication signal through a second communication signal via the first to Nslave controllers.

Communication method between master controller and slave controller, slave controller for the same, and battery management system using the same

An apparatus and a method of detecting liquid leakage within a battery pack using a gyro sensor and a moisture detecting sensor. When liquid leakage of a coolant is detected, such as when a pipe of a coolant supplied for cooling (radiating heat) within a battery pack is damaged, the apparatus recognizes a liquid leakage generation position according to a slope of the battery pack by using a gyro sensor and determines whether the liquid leakage is generated based on a difference in a temperature between an upper side and a lower side of a corresponding region by using moisture detecting sensors, thereby improving accuracy of the detection of the liquid leakage according to the slope and the position of the battery pack. Particularly, the moisture detecting sensor is operated to be on only when the detection of the liquid leakage is required, thereby preventing unnecessary energy consumption.

Device and method for detecting liquid leak into battery pack by using gyro sensor and moisture detection sensor

Disclosed are a system and a method of managing a battery by using a balancing battery. The system for managing a battery includes: a battery unit which includes a plurality of battery modules and provides electric energy to an electronic device; a cooling fan which adjusts a flow rate of a fluid flowing into the battery unit; a fan control circuit which controls an operation of the cooling fan; and a balancing battery which performs balancing of the plurality of battery modules by supplying electric energy to one or more of the plurality of battery modules and charging the one or more battery modules, or receiving electric energy from one or more of the plurality of battery modules, and supplies electric energy to the cooling fan under a control of the fan control circuit.

System and method of managing battery by using balancing battery

Growing community of inventors

Daejeon, South Korea

Kyoung Choon Min