Lg Chem, Ltd

Lg Chemical Ltd.

Lg Chemical Co., Ltd.

Lg Energy Solution, Ltd.

Soo-Ryoung Kim

Jee-Ho Kim

Ho-Kyung Byun

Yong-Rae Kim

Jeong-O Mun

Dal-Mo Kang

Hyun-Sik Kim

Jae-Hun Yang

Hyeon-Jin Song

Jae-Min Lee

Yang-Lim Choi

Jae-Chan Lee

Won-Tae Lee

Kwang-Ho Yoo

Young-Gil Kim

Sang-Wook Yim

Young-Tae Kang

Jeoung-Soo Kim

Ho-Kyung 303-701 Daewoo Apt Byun

An apparatus and method for protecting each of a plurality of cell stacks included in a battery pack from overcharge. The overcharge prevention apparatus prevents the overcharge of a plurality of cell stacks connected in series within a high current path. The overcharge prevention apparatus includes a voltage measuring unit configured to measure voltage of each cell stack, and generate a first monitoring signal indicating the measured voltage, a current regulating unit configured to selectively provide a bypass path to each cell stack, and a controller connected to the voltage measuring unit and the current regulating unit allowing communication. The controller is configured to control the current regulating unit based on the first monitoring signal from the voltage measuring unit.

Apparatus and method for preventing overcharge

Disclosed is a battery pack including a bushing for connecting an end plate. The battery pack according to the present disclosure connects an upper housing and an end plate for a battery module assembly by the bushing.

Battery pack including bushing for connecting end plate

The present invention relates to a punched electrode and a rechargeable lithium battery using the same, and more particularly to a punched electrode and a rechargeable lithium battery using the same that can improve cycle life, capacity, and safety characteristics of the battery. The present invention can improve cycle life, capacity, and rate characteristics etc. of the battery by making the impregnation rate of an electrolyte higher and by uniformly controlling the impregnation degree, and it can improve safety properties of the battery by preventing lithium deposition such that a uniform electrode reaction occurs, through punching out a hole in an anode, an anode/cathode, or an anode/cathode/separator of an electrode group that comprises the inner part of the lithium secondary battery.

Punched electrode and rechargeable lithium battery using the same

In a battery in which a separator is disposed between a cathode and an anode, a jelly roll is wound with the separator. The cathode, the anode and the separator are received in a battery case and surrounded with an electrolyte, and an opening of the battery case is sealed by a top cap assembly connected to the cathode. A curved groove is formed on the battery case as a safety element for preventing the explosion of the battery due to an increase of internal pressure, the groove being formed along a line of equal stress on the surface of the battery case.

Safety plate of secondary battery

The invention is a lithium secondary battery that prevents electrolyte and internal gas leakage by durably sealing the electrolyte injecting hole. The lithium secondary battery consists of a battery can, which contains a polar plate set with an anode plate, and a separator inserted and installed inside the battery can. The opening of the battery can has a cap assembly with an electrolyte injecting hole so that the can interior can be sealed. To seal the battery can, a rivet shaped sealing member is inserted in the electrolyte injecting hole. The sealing member is placed in contact with the cap assembly at an area surrounding the electrolyte injecting hole and affixed to the cap assembly.

Device for sealing lithium secondary battery electrolyte injecting hole

The present invention relates to a prismatic lithium ion battery, more particularly to a prismatic lithium ion battery, wherein jelly roll of a lithium ion battery is mounted and electrolyte is infused in a prismatic can. The present invention provides a prismatic lithium ion battery in which improved safety is provided to a battery itself as well as its battery pack by mounting a jelly roll into a prismatic can with surfaces with recessed portions so that battery volume change due to the electrode expansion and pressure rise inside the battery is restrained. Furthermore, a prismatic lithium ion battery of the present invention improves the cycle life characteristics of a battery by alleviating the jelly roll deformation caused by the expansion and contraction of a jelly roll of a lithium ion battery due to continuous charging and discharging. Accordingly, lithium metal can be uniformly and stably adsorbed in and detached from a jelly roll.

Lithium ion battery using prismatic can with recessed surfaces

Growing community of inventors

Daejeon, South Korea

Soo-Ryoung Kim