Lg Chem, Ltd

Lg Energy Solution, Ltd.

Wontae Lee

Yanglim Choi

Chul Haeng Lee

Kyoung Ho Ahn

Hyeon Jin Song

Su Hyeon Ji

Junhyeok Han

Youngho Oh

Won-Kyung Shin

A lithium secondary battery is disclosed herein. The secondary battery has improved high temperature safety and may prevent generation of a large amount of gas under a high temperature condition, which prevents an increase in resistance and a decrease in capacity due to the elution of metal ions from an electrode by uniformly forming a coating film on an electrode surface during activation of the battery. A positive electrode active material of the battery includes a high concentration(s) of nickel and/or manganese and a non-aqueous electrolyte including an additive are used, which improves performance and high-temperature safety of the battery.

Lithium secondary battery with improved safety

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 a secondary battery, which detects a displacement of a gas discharging part and prevents battery cell swelling, and a system for charging a secondary battery and a method of manufacturing a secondary battery. The secondary battery include a gas discharging part, which is positioned at one end of a sealing part that seals an electrode assembly and induces a discharge of gas by weakening bonding force more than other attachment portions of the sealing part, and a detecting part which detects a displacement generated in the gas discharging part and generates an electric signal.

Secondary battery which detects displacement of gas discharge part to prevent battery cell swelling, system for charging secondary battery, and method for manufacturing secondary battery

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Daejeon, South Korea

Wontae Lee