Lg Energy Solution, Ltd.

Lg Chem, Ltd

Joo Hwan Sung

Jung Koo Kang

Sung Pil Yoon

Jin Soo Lee

Jin Young Kim

Hae Jin Lim

Seong Min Kim

Ju Bin Kim

Seunghe Woo

Min Su Cho

Min Gyu Kim

Yong Gon Lee

Han Sol Park

Je Jun Lee

Hyoung Kwon Kim

Hyeon Min Song

Kyung Min Kim

Pil Kyu Park

Younguk Park

Geon Woo Min

Jin Young Park

Duk Hyun Ryu

Dong Myung Kim

Soonho Ahn

Yeo Min Yoon

Jae Woong Kim

Han Gab Song

Ha Young Heo

Min Gi Jeong

Jung Hoon Kim

Myung An Lee

Kil Young Lee

Cheon Hee Bok

Kwang Su Hwangbo

Sang Hak Chae

Minsu Cho

Sunghae Park

Jae Won Lim

Sue Jin Kim

Hee Chang Youn

Ik Jong Lee

Junghyun Choi

Min Wook Lee

Jingoo Kwak

Jinsu Jang

Tae Hyun Kwon

Ji Min Park

Ju Young Yun

Seok Jin Oh

Geun Young Park

Jinsoo Kim

Yong Han Kim

Hyeon Soo Sim

Byung Sup Kim

Byung Hyuk Choi

YounJoong Kim

Sanggu Ji

Mingi Jeong

Yeong Hun Jung

Dana Kim

Huigyun Nam

Ran Eun Lee

Hye In Ko

Min Seon Kim

A button-type secondary battery includes an electrode assembly in which a negative electrode, a separator, and a positive electrode are layered wound in a state of being layered; a lower can in which the electrode assembly is mounted, and a space portion is defined as a surplus space in addition to a space in which the electrode assembly is mounted; an upper can coupled to the lower can to close the lower can in a state in which the electrode assembly is mounted in the lower can, and an electrolyte is injected; and a swelling member mounted in the lower can in a state of being coupled to an outer surface of the electrode assembly. When the electrolyte is injected, the swelling member absorbs the electrolyte to be expanded in volume within the space portion.

Button-type secondary battery

A button-type secondary battery includes an electrode assembly; a lower can into which the electrode assembly is disposed; and an upper can configured to cover an opening of an upper end of the lower can. A beading part recessed inward is disposed at an upper portion of the lower can. The upper end of the lower can disposed above the beading part has a bent shape and configured to surround an edge end of the upper can so that the upper can and the lower can are coupled to each other.

The present disclosure relates to an anode for a lithium secondary battery, wherein an anode material layer is formed on at least one surface of an anode current collector, and

Anode including graphite and silicon-based material having different diameters and lithium secondary battery including the same

A secondary battery includes an electrode assembly, and a battery case accommodating the battery case together with an electrolytic solution. The battery case includes a metal. The battery case is opened in its upper part; and a cap assembly that is coupled to the opened upper part of the can body. The can body includes a beading part that is bent inward at the upper part of the housing part, and a crimping part that is bent in a direction in which the cap assembly is located at an upper part of the beading part. At least one of the bottom part or the crimping part of the can body has a metal member inserted therein. The metal member has a lower melting point than the metal of the can body.

Secondary battery in which a metal member is inserted into can body to improve safety

A button-type secondary battery includes an electrode assembly including a first separator, a negative electrode, a second separator, and a positive electrode that are sequentially stacked and wound, wherein ends of the first separator and the second separator are disposed closer to a center of the wound electrode assembly than ends of the positive electrode and the negative electrode; an electrolyte; and a can in which the electrode assembly and the electrolyte are accommodated. In the electrode assembly, an expansion member is attached to at least one central end of the first separator or the second separator, and the expansion member is expanded by absorbing the electrolyte.

The present disclosure relates to a lithium secondary battery with improved safety during thermal runaway. The lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte, and has a nominal voltage of 3.68 V or greater, and Vrepresented by Equation (1) below is 4 mbar·Ah−1·sec−1 or less: Equation (1): V=ΔP/(t×C).

Lithium secondary battery

A button-type secondary battery according to the present disclosure includes: an electrode assembly; a lower can configured to accommodate the electrode assembly; an upper can coupled to an opening of the lower can; a gasket configured to insulate a coupling portion between the lower can and the upper can; and a center part provided at a core portion of the electrode assembly, wherein the center part includes: a center pin inserted into the core portion of the electrode assembly; and an upper plate provided with an upper cover surface provided on an upper end of the center pin to protect an upper portion of the electrode assembly, wherein an edge of the upper cover surface is provided to be supported on an inner wall of the lower can.

The present disclosure relates to a lithium secondary battery with improved safety during thermal runaway. The lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte, and has a nominal voltage of 3.68 V or greater, and Vrepresented by Equation (1) below measured after manufacturing a test module by stacking four of the lithium secondary battery fully charged by being charged to 4.35 V is 4 Ah/sec or less: Equation (1): V=C/t.

A cylindrical secondary battery includes an electrode assembly having a positive electrode/separator/negative electrode structure positioned in a cylindrical battery can. The cylindrical secondary battery comprises: a first insulating layer mounted at the upper end of the electrode assembly and having a first through hole through which the electrode tab penetrates, and a second insulating layer mounted at the upper end of the first insulating layer and having a second through hole formed to align with a central axis of the electrode assembly. A method of manufacturing the cylindrical secondary battery is also provided.

Cylindrical secondary battery and manufacturing method thereof

An electrode active material coating device according includes a transfer unit for continuously transferring a substrate in a first direction; a coating die for forming a coated portion by ejecting an electrode active material slurry on the substrate; and a guide unit including a guide portion that moves along the first direction between the coating die and the substrate.

Electrode active material coating device and method for coating electrode active materials

The present disclosure provides a battery tab-feeding device including a battery tab disposed on a non-coating part of an electrode plate during a process of manufacturing an electrode by fusing the battery tab to the non-coating part of an electrode plate, an electrode plate supporting part disposed to support the electrode plate having a first surface exposed from both surfaces of the electrode plate and a tab transferring part disposed to support a battery tab and transfer the battery tab to the non-coating part of the electrode plate. Additionally, a guide part guides the transfer of the battery tab to position a first side edge of the battery tab perpendicular to a first side edge of the electrode plate.

Electrode tab-feeding device including guide for positioning electrode tab at correct point

Disclosed is a battery cell connector formed so as to have a general hexahedral shape, the battery cell connector including a lower mounting unit, in which a lower part of a cylindrical battery cell is mounted, an upper mounting unit, in which an upper part of another cylindrical battery cell is mounted, and a connection unit formed at a front surface, a rear surface, a left surface, and a right surface of the battery cell. The connection unit being configured to electrically and physically connect the battery cell connector to another battery cell connector, wherein the lower mounting unit, the upper mounting unit, and the connection unit are electrically connected to each other in the battery cell connector.

Battery cell connector and battery cell structure including battery cells connected to each other using the same

An internal pressure measuring jig for a cylindrical battery cell, of the present invention, comprises: a lower jig which has a form corresponding to a cylindrical battery cell, and has a temperature measuring part and a receiving groove in which the cylindrical battery cell is separably inserted; and an upper jig which discharges gas inside the cylindrical battery cell, has a pressure measuring part for measuring the pressure of the discharged gas, and is separably coupled to the lower jig so as to close off an opening part of the receiving groove.

Internal pressure measuring jig for cylindrical battery cell

A cylindrical battery comprising a lithium secondary battery and having a pressure sensor for measuring an internal pressure of the secondary battery, the cylindrical battery as a whole includes: an electrode assembly including a cathode plate, an anode plate, and a separator electrically insulating the cathode plate and the anode plate from each other; the pressure sensor positioned on one side of the electrode assembly and embedded in the cylindrical battery; and a top cap positioned on the other side of the electrode assembly, wherein the pressure sensor has an insulating property.

Cylindrical battery having pressure sensor, and method for measuring internal pressure thereof

Growing community of inventors

Daejeon, South Korea

Joo Hwan Sung