Lg Chem, Ltd

Lg Energy Solution, Ltd.

Geun Chang Chung

Song Taek Oh

Jonghyun Chae

Young Geun Choi

Jong Mo Jung

Seung Jae Yoon

Yourim Yoon

Sin Kyu Kim

Chul Haeng Lee

Young Cheol Choi

Jae Hyun Lee

Jung Hwan Park

Su Hwan Kim

Sun Jung Hwang

Seunghyun Chung

Juichi Arai

Min Hee Lee

Sun Kyu Kim

Jung Seok Choi

Sang Uck Lee

Won Hee Jeong

Keun Wan An

Je Young Kim

Sung Kyun Chang

Sin Young Park

Yong Tae Lee

Jung Woo Yoo

Jong Pil Park

Yoon Kyung Kwon

Won Seok Jeong

Hyun Kuk Noh

Hyun Seok Lee

Su Rim Lee

Seung Ryul Choi

Jae Kook Kim

Seung Hyun Chung

Jin Hyung Lim

Dong Seok Shin

Jin Sub Lim

Yo Han Ko

Kyungkoo Lee

Min Sun Cho

Bong Kook Youn

KeunWan An

Disclosed herein is a pouch-shaped secondary battery configured to have a structure in which a unit cell, including an electrode assembly constituted by a positive electrode and a negative electrode, stacked in the state in which a separator is interposed between the positive electrode and the negative electrode, electrode tabs, and electrode leads, or a cell assembly, including two or more stacked unit cells, is mounted in a pouch-shaped case, wherein the pouch-shaped secondary battery includes a unidirectional structure in which electrode terminals oriented in two directions are changed to electrode terminals oriented in one direction. In the case in which a battery pack is constituted using a bidirectional cell, a large space is required, whereby the energy density of the battery pack is reduced. The disclosed pouch-shaped secondary battery has the effect of solving the above problem.

Pouch-shaped secondary battery having structure in which bidirectional cell is changed to unidirectional cell

Provided is a composite electrode for a lithium secondary battery for improving output and a lithium secondary battery including the composite electrode, in which, in a composite electrode having two or more active materials mixed therein, an active material having a small particle size is included in the composite electrode by being coagulated and secondarily granulated so as to allow mixed active material particles to have a uniform size, and thus, electrical conductivity is improved to have high output characteristics.

Active material for lithium secondary battery composite electrode for improving output and lithium secondary battery including the active material

Disclosed herein is a battery cell configured to have a structure in which a stacked structure including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode is mounted in a receiving part of a battery case, one or more holes are formed from the battery case to the positive electrode or the negative electrode of the electrode assembly, and a transparent window is formed in a portion of the battery case corresponding to the holes.

Battery cell having hole

Disclosed is a lithium secondary battery including: (i) a cathode active material including a lithium metal phosphate according to Formula 1 below; (ii) an anode active material including amorphous carbon; and (iii) an electrolyte for lithium secondary batteries including a lithium salt and an ether based solvent, wherein propylene carbonate (PC) is included in an amount of 1 wt % to 60 wt % in the electrolyte for lithium secondary batteries, based on the total weight of the electrolyte,LiM(PO)X&#x2003;&#x2003;(1)

Lithium secondary battery

Disclosed is a positive electrode for secondary batteries manufactured by coating and rolling a slurry for a positive electrode mix including positive electrode active material particles on a current collector, wherein the positive electrode active material particles include one or more selected from the group consisting of lithium iron phosphate particles having an olivine crystal structure and lithium nickel-manganese-cobalt composite oxide particles according to Formula 1, the lithium nickel-manganese-cobalt composite oxide particles existing as secondary particles formed by agglomeration of primary particles, in an amount of greater than 50% and less than 90% based on the total volume of lithium nickel-manganese-cobalt composite oxide, and the lithium iron phosphate particles existing as primary particles in an amount of greater than 50% and less than 100% based on the total volume of lithium iron phosphate (Formula 1 is the same as defined in Claim).

Positive electrode for secondary batteries and secondary battery including the same

Disclosed herein is a lithium secondary battery including a positive electrode including lithium iron phosphate and layered lithium nickel manganese cobalt oxide as a positive electrode active material and a negative electrode including a negative electrode active material having a potential difference of 3.10 V or higher from the lithium iron phosphate at a point of 50% state of charge (SOC) afforded by the entirety of the lithium iron phosphate.

Secondary battery

Disclosed herein is a battery cell configured such that at least one electrode assembly of a structure having a cathode, an anode, and a separator interposed between the cathode and the anode is mounted in a battery case, at least one heat dissipation member to dissipate heat generated in the electrode assembly during charge and discharge of the battery cell or upon occurrence of a short circuit is disposed in the electrode assembly and/or is in contact with an outer surface of the electrode assembly, and a portion of the heat dissipation member is exposed outward from the electrode assembly.

Battery cell of improved cooling efficiency

Disclosed are an electrolyte for lithium secondary batteries including 10 wt % to 90 wt % of an ester based solvent and 10 wt % to 90 wt % of a carbonate based solvent with respect to the total weight of a non-aqueous solvent, and a lithium secondary battery including the same.

Electrolyte for lithium secondary batteries and lithium secondary battery including the same

Disclosed is a lithium secondary battery including (i) a cathode active material including a lithium metal phosphate according to Formula 1 below; and (ii) an anode active material including amorphous carbon,LiM(PO)X&#x2003;&#x2003;(1)

The present invention relates to a battery pack capable of discharging gases in a pouch type battery cell when a gas pressure inside the pouch type battery cell is increased over a reference pressure, the battery pack including: a plurality of pouch type battery cells; a case comprising partitions suppressing the pouch type battery cells from expanding in a thickness direction thereof, wherein the pouch type battery cells are respectively held in spaces defined by the partitions; and a punching unit installed on the case to pierce a portion of surfaces of the pouch type battery cells, which is not supported by the partition, and having pin members of which number is equal to that of the pouch type battery cells.

Battery pack capable of discharging gases in pouch type battery cell

Provided are a mixed cathode active material having improved power characteristics and safety, and a lithium secondary battery including the same. More particularly, the present invention relates to a mixed cathode active material which may assist power in a low SOC range to widen an available state of charge (SOC) range and may simultaneously provide improved safety by blending substituted LFP, in which operating voltage is adjusted by substituting a portion of iron (Fe) with other elements such as titanium (Ti), in order to prevent a rapid increase in resistance of manganese (Mn)-rich having high capacity but low operating voltage in a low SOC range (e.g., a SOC range of 10% to 40%), and a lithium secondary battery including the mixed cathode active material.

Mixed cathode active material having improved power characteristics and safety, and lithium secondary battery including the same

Disclosed are an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which the non-aqueous solvent includes an ether based solvent and a glyme based solvent and a ratio of the ether based solvent to the glyme based solvent is 20:80 to 60:40 based on the total volume of the non-aqueous solvent, and a secondary battery including the same.

Disclosed is a lithium secondary battery including (i) a cathode active material including a lithium metal phosphate according to Formula 1 below, (ii) an anode active material including amorphous carbon, and (iii) an electrolyte for lithium secondary batteries including a lithium salt and an ether-based solvent,LiM(PO)X&#x2003;&#x2003;(1)

A mixed positive electrode active material comprising a lithium manganese oxide represented by following [Chemical Formula 1] and a second positive electrode active material represented by following [Chemical Formula 2], and a lithium secondary battery comprising the same are disclosed.LiMnO.(1&#x2212;)LiMO&#x2003;&#x2003;[Chemical Formula 1] In [Chemical Formula 1], 0&#x3c;a&#x3c;1, 0.9&#x2266;x&#x2266;1.2, and M is at least one element selected from the group consisting of Al, Mg, Mn, Ni, Co, Cr, V and Fe.LiMnCOMO&#x2003;&#x2003;[Chemical Formula 2] In [Chemical Formula 2], 0&#x3c;x&#x3c;1.5, 0&#x2266;y&#x3c;0.5, and M is at least one of transition metal elements. By comprising Mn-rich and Co-doped LiMnO, a rapid output decrease at a low SOC section may be relaxed to enlarge an available SOC section. Improved output may be obtained throughout an entire SOC section when compared with a case using pure LiMnO.

Positive electrode active material with improved output and lithium secondary battery comprising the same

Growing community of inventors

Daejeon, South Korea

Geun Chang Chung