Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hey Woong Park

Min Su Kim

Jisang Yu

Sung Joon Park

Seungdon Choi

Wonhee Jeong

Jin Kyu Lee

Dal Mo Kang

BumHyun Lee

Jongmoon Yoon

John E Namgoong

Hee Soo Yoon

Jeeho Kim

Hanho Lee

Kijae Kim

Seong Yoon Lim

Ra Young Hwang

Hojin Jeon

Seungtaek Hong

Daesik Choi

Min Hyung Kim

Seung Ho Na

Seung Don Choi

Dae Sik Choi

Bo Hyun Kim

Sung-Woo Kim

Kwangho Yoo

Hyunwoo Park

Yo Jin Kim

Sung Won Lee

Ho Jin Jeon

Seung-Taek Hong

Ji-Sang Yu

Nan Ji Yun

Dal Moh Kang

Han Kil Kim

Jeong Wan Yoo

Jae Hong Shim

Woo Sup Kim

Disclosed are a pouch type secondary battery, a battery pack, and a method for manufacturing the pouch type secondary battery. According to one aspect of the present invention, in an exterior accommodating an electrode assembly, a sealing part is formed along a circumference of the electrode assembly. The sealing part includes a first sealing part formed to cover an electrode lead, and one end of the first sealing part is formed below an upper end of a circumference of a cup formed in the pouch.

Pouch type secondary battery, battery pack, and method for manufacturing pouch type secondary battery

A battery module includes a secondary battery including an electrode assembly formed by alternately stacking an electrode and a separator and a pouch type battery case which accommodates the electrode assembly therein and in which an upper case and a lower case are integrated with each other, a housing which includes at least one opening and into which the secondary battery is inserted through an opening of the at least one opening, and a cooling unit formed in the housing and disposed at one side of the secondary battery. The battery case includes a folding edge part formed at an area on a side of the secondary battery at which the upper case and the lower case are folded at an edge where the upper case and the lower case are connected, and the folding edge part of the secondary battery directly contacts the cooling unit.

Battery module

Battery

Disclosed herein is an electrode assembly for secondary batteries, wherein the electrode assembly is constructed in a structure in which a cathode, having an active material layer coated on one major surface of a current collector, and an anode, having an active material layer coated on one major surface of another current collector, are bent in a zigzag fashion in vertical section, and the cathode and the anode are fitted to each other, such that the electrode active material layers face each other, while a separator is disposed between the cathode and the anode. The electrode assembly according to the present invention has the effect of simplifying a process for manufacturing a battery, thereby reducing the manufacturing costs and the manufacturing time, and therefore, improving the productivity.

Electrolyte assembly for secondary battery of novel laminated structure

Disclosed is the present invention directed to a process for manufacturing an electrode assembly, including: prior to assembling to electrode, bending a cathode, having an active material layer coated on one major surface of a current collector, and an anode, having an active material layer coated on one major surface of another current collector, in a zigzag fashion in vertical sections; and after the bending of the cathode and the anode, fitting the cathode and the anode to each other, such that the electrode active material layers face each other, while a separator is disposed between the cathode and the anode.

Process for manufacturing electrolyte assembly for secondary battery of novel laminated structure

The present invention relates to a lithium secondary battery comprising a battery cell formed by stacking a plurality of full cells having a structure of cathode/separator/anode or bicells having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode (anode), as a unit electrode assembly, wherein (i) a cathode active material or (ii) an anode active material or (iii) a cathode active material and an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.

Stacking-type secondary battery providing two or more operation voltages

Provided is a positive electrode active material. The positive electrode active material includes: a small-diameter active material having an average particle diameter of about 0.5 &#x3bc;m and a maximum particle diameter of less than about 1 &#x3bc;m; and a large-diameter active material having an average particle diameter of about 5 &#x3bc;m to about 20 &#x3bc;m and a maximum particle diameter of less than about 100 &#x3bc;m.

Positive electrode active material, and positive electrode and lithium secondary battery including the same

Disclosed herein is a high-power, large-capacity battery module including a plurality of battery cells or unit modules connected in series to each other such that the battery cells or the unit modules are stacked while being in tight contact with each other or being adjacent to each other, wherein the battery module is fixed such that the stacked state of the battery cells or the unit modules is maintained even when the volume of the battery cells or the unit modules changes at the time of charging and discharging the battery cells or the unit modules, and a portion of an electrode terminal connection region between the battery cells or between the unit modules is weak with respect to the volume expansion of the battery cells or the unit modules such that an expansion stress caused by the swelling of the battery cells is concentrated on the electrode terminal connection region, whereby the electrode terminal connection region is broken, and therefore, an electrical cut-off occurs at the electrode terminal connection region, when the swelling exceeds a predetermined value.

Battery module of improved safety and middle or large-sized battery pack containing the same

Provided is a stacked-type secondary battery comprising a battery cell formed by stacking a plurality of full cells having a structure of cathode/separator/anode or bicells having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode(anode), as a unit electrode assembly, wherein a cathode active material and/or an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.

Stacking-typed secondary battery providing two or more operation voltages

Disclosed is a lithium secondary battery comprising an electrode assembly composed of a cathode, an anode and a separator, and a lithium electrolyte, wherein the electrodes and/or electrolyte include a compound ('urethane compound') and/or polymer ('poly urethane') which are decomposed upon overcharge of the battery and contain a urethane group in a molecular structure thereof. The lithium secondary battery of the present invention is characterized by addition of a compound or polymer having a urethane group to electrodes and/or electrolyte, wherein the thus-added compound and/or polymer have substantially no adverse effects on general performance of the battery under normal operating conditions and are decomposed with high reliability upon overcharge of the battery, thereby offering time delay effects for securing battery safety, and the decomposition products thereof result in sharply increased internal resistance of the battery, thereby increasing battery safety.

Lithium secondary battery having improved stability to overcharge

The present invention provides a non-aqueous electrolyte-based high power lithium secondary battery having a long-term service life and superior safety at both room temperature and high temperature, even after repeated high-current charging and discharging, wherein the battery comprises a mixture of a particular lithium manganese-metal composite oxide (A) having a spinel structure and a particular lithium nickel-manganese-cobalt composite oxide (B) having a layered structure, as a cathode active material.

Lithium secondary battery with high power

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Daejeon, South Korea

Hey Woong Park