Lg Energy Solution, Ltd.

Iucf-hyu

Won Tae Lee

Chul Haeng Lee

Dong Won Kim

Kyoung Ho Ahn

Won Kyung Shin

Jun Hyeok Han

Su Hyeon Ji

Young Ho Oh

Min Jung Kim

Sung Tack Hwang

You Kyeong Jeong

Sol Ji Park

Jae Hyuk Cha

Chang Bok Lee

Bo Ra Jeong

Da Ae Lim

A lithium secondary battery has excellent economic feasibility and safety because an iron phosphate of Formula 2 having an olivine structure is included as a positive electrode active material, and also has advantages of excellent battery performance and lifespan because an electrolyte additive of Formula 1 having a specific molecular weight is included in an electrolyte to improve an increase in internal resistance of the battery during charging and discharging and effectively prevent iron ions from being exsolved from the positive electrode active material,

Lithium secondary battery with inhibited exsolution of transition metal

The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, which may form a robust solid electrolyte interphase (SEI), and a lithium secondary battery in which battery performance is improved by including the same. Specifically, the non-aqueous electrolyte solution for a secondary battery includes a lithium salt, a non-aqueous organic solvent, a first additive, and a second additive, wherein the non-aqueous electrolyte solution for a secondary battery may include an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2 as the first additive, and may include at least one selected from the group consisting of a nitrile-based compound, a lithium salt compound, and a cyclic carbonate compound as the second additive.

Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same

The present invention relates to an electrolyte composition including a lithium salt; a non-aqueous organic solvent; a compound represented by a specific formula; and a perfluoropolyether oligomer, a gel polymer electrolyte including a polymer network which is formed by a polymerization reaction of the electrolyte composition, and a lithium secondary battery including the same.

Electrolyte composition, gel polymer electrolyte and lithium secondary battery including the same

The present invention relates to a battery disconnect unit including a fuse connected to a battery pack, the fuse being configured to interrupt overcurrent of the battery pack, at least one sensor configured to measure voltage or current of the battery pack, at least one relay configured to connect or disconnect the battery pack and the load to or from each other based on a value of the voltage or the current measured by the sensor, a housing configured to allow the fuse, the sensor, and the relay to be mounted therein, and a moving plate configured to fix the relay and the sensor to the housing, the position of the moving plate being changeable depending on sizes of the relay and the sensor.

Battery disconnect unit including moving plate

An electrolyte composition and a lithium secondary battery including the same are disclose herein. The electrolyte composition has improved high temperature safety. In some embodiments, the electrolyte composition includes an additive including a compound represented by Formula 1. Each Ris independently a single bond, an alkylene group having 1 to 10 carbon atoms, or each Ris independently a double or triple bond including 2 carbon atoms, each Ris independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and a is an integer of 1 to 10. The additive may reinforce an SEI layer on the surface of an electrode, thereby having advantages of improved storage and lifetime characteristics at a high temperature and a decreased amount of gas generated in the battery.

Lithium secondary battery with improved safety

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1, a repeating unit derived from a monomer represented by Formula 2, and a repeating unit derived from a monomer represented by Formula 3. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.

A gel polymer electrolyte composition, a secondary battery including the same, and a manufacturing method of a secondary battery are disclosed. Advantages of the disclosed aspects include increasing process efficiency by reducing the curing time of a gel polymer electrolyte while preventing leakage of an electrolyte.

Gel polymer electrolyte composition attaining shortened crosslinking time, secondary battery comprising same, and manufacturing method for secondary battery

A battery current measuring device includes a switching element configured to control charging and discharging of a battery, an A/D converter configured to convert a voltage value across the switching element into a digital value, a temperature compensation unit having a diode structure capable of compensating for a resistance change according to a change of temperature of the switching element, and a current calculation unit configured to calculate a current flowing through the switching element based on the digital value of the voltage value, and the A/D converter converts the voltage value of the switching element into the digital value using a reference voltage inputted from the temperature compensation unit.

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Daejeon, South Korea

Won Tae Lee