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公开(公告)号：US20240319125A1
公开(公告)日：2024-09-26
申请号：US18269516
申请日：2022-07-01
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Jung Hoon LEE , Su Taek JUNG
IPC: G01N27/20 , B23K31/12 , G01N27/02 , H01M10/04 , H01M50/536 , H01M50/609
CPC classification number: G01N27/20 , B23K31/125 , G01N27/021 , G01N27/028 , H01M10/04 , H01M50/536 , H01M50/609
Abstract: A battery may include: a tap or a current collector plate welded to a current collector of an electrode assembly in which the current collector and a separator are wound or stacked; and a can housing or electrode lead welded to the tap or current collector plate. A method for inspecting a welding state of a battery may include: measuring a first impedance by applying, prior to injecting an electrolyte into the battery, an alternating current or an alternating voltage at a frequency band; preparing a first Cole-Cole plot based on the first impedance; and determining the welding state of the battery based on an x-intercept value on the first Cole-Cole plot. A method for manufacturing a battery is also disclosed.
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公开(公告)号：US20230134729A1
公开(公告)日：2023-05-04
申请号：US17908719
申请日：2021-06-16
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Sang Ho BAE , Hun Bum JUNG , Ji Hun HWANG , Cha Hun KU , Su Taek JUNG , Chang Min HAN , Joo Young CHUNG , Yong Jun LEE , Jae Hwa CHOI , Young Seok BAEK , Jin Yong LEE
IPC: G01N3/02 , G01N33/2045 , G01N33/207 , H01M10/48 , H01M50/536
Abstract: The present technology relates to a method of inspecting a welding defect. The method includes: manufacturing an electrode assembly sample by welding an electrode lead on an electrode tab formed on an electrode assembly; measuring a tensile strength, a torsional strength and a peeling strength of a welded portion between the electrode tab and the electrode lead for the electrode assembly sample; deriving correlation between whether there is a welding defect and each of the tensile strength, the torsional strength, and the peeling strength; and deriving a reference value for determining whether there is a welding defect for the tensile strength, the torsional strength, and the peeling strength, respectively.
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公开(公告)号：US20240120616A1
公开(公告)日：2024-04-11
申请号：US18276538
申请日：2022-04-19
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Soon Kwan KWON , Su Taek JUNG , Seok Hoon JANG , Hyeok JEONG , Sang Ho BAE , Byeong Kyu LEE , Seong Won CHOI , Min Wook KIM , Yong Jun LEE
IPC: H01M50/46 , H01M10/04 , H01M10/658 , H01M50/107 , H01M50/403 , H01M50/531
CPC classification number: H01M50/46 , H01M10/0422 , H01M10/049 , H01M10/658 , H01M50/107 , H01M50/403 , H01M50/531
Abstract: A secondary battery includes an electrode assembly having a positive electrode provided with a positive electrode tab, a separator, and a negative electrode provided with a negative electrode tab, the positive electrode, the separator, and the negative electrode being wound, the electrode assembly having a core part at a center thereof; a can configured to receive the electrode assembly therein, the negative electrode tab being connected to the can; a cap assembly coupled to an opening of the can, the positive electrode tab being connected to the cap assembly; and a reinforcing member provided on an end of the separator exposed beyond the positive electrode or the negative electrode to prevent heat of the positive electrode tab or the negative electrode tab from being transferred to the separator.
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公开(公告)号：US20240039027A1
公开(公告)日：2024-02-01
申请号：US17769278
申请日：2020-07-10
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Byeong Kyu LEE , Su Taek JUNG , Soon Kwan KWON , Hyun Kyung SHIN , Won Nyeon KIM , Seong Won CHOI
IPC: H01M10/04 , H01M50/46 , H01M10/0585 , B05C3/12 , B05C11/10
CPC classification number: H01M10/0404 , H01M50/46 , H01M10/0585 , B05C3/125 , B05C11/1039 , B05C11/1042
Abstract: A method of manufacturing a unit cell having a negative electrode, a separator, and a positive electrode are stacked and placed between guide rollers. One of the positive electrode and the negative electrode. The separator is coated with a binder, and the separator is dipped in a solvent to soften a cured binder before the separator is put between the guide rollers. An apparatus for manufacturing a unit cell includes a reservoir in which at least two or more transfer rollers that rotate while the separator passes therethrough are mounted, and a solvent is stored at a predetermined level; and a chamber into which the separator passing through a reservoir is put together with the positive electrode and the negative electrode. Guide rollers are disposed so that the negative electrode and the positive electrode move to both surfaces of the separator, respectively.
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5.发明公开
公开(公告)号：US20230378611A1
公开(公告)日：2023-11-23
申请号：US18030297
申请日：2022-03-03
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Seok Hoon JANG , Byeong Kyu LEE , Hyeok JEONG , Soon Kwan KWON , Su Taek JUNG
IPC: H01M50/463 , H01M50/417 , H01M50/449 , H01M50/46 , H01M50/406 , H01M50/531
CPC classification number: H01M50/463 , H01M50/417 , H01M50/449 , H01M50/46 , H01M50/406 , H01M50/531
Abstract: A separator includes a polyolefin-based separator substrate and a coating portion formed on at least a part of an outer surface of the separator substrate. An uneven portion is formed along an outer periphery of at least one side of the separator, whereby it is possible to prevent deviation of a separator sheet from a movement direction during transfer of the separator sheet and stacking of an electrode assembly.
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公开(公告)号：US20240310313A1
公开(公告)日：2024-09-19
申请号：US18276611
申请日：2022-06-09
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Jung Hoon LEE , Su Taek JUNG , Seok Jin KIM , Ji Hoon LEE , Sang Hyun KOO , Min Wook KIM
IPC: G01N27/04 , B23K31/12 , H01M10/42 , H01M50/536
CPC classification number: G01N27/041 , B23K31/125 , H01M10/4285 , H01M50/536
Abstract: A device for inspecting a welded state of a plurality of welded portions coupling a non-coating portion of an electrode to an electrode tab includes a resistance measurer having a plurality of resistance measurement probes which respectively measure resistance values of the plurality of welded portions; and a resistance inspector which compares each of the resistance values of the plurality of welded portions, with a critical resistance value. When the resistance value of at least one welded portion among the plurality of welded portions exceeds the critical resistance value, the at least one welded portion is determined as having a weak welding. The plurality of resistance measurement probes respectively measure the resistance values of the plurality of welded portions while being respectively in contact with a non-welding surface disposed between the plurality of welded portions and non-welding surfaces outside outermost welded portions of the plurality of welded portions.
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7.发明公开
公开(公告)号：US20240088520A1
公开(公告)日：2024-03-14
申请号：US17768087
申请日：2020-10-14
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Soon Kwan KWON , Seong Won CHOI , Su Taek JUNG
IPC: H01M50/403 , H01M10/04 , H01M50/46 , H01M50/463 , H01M50/531
CPC classification number: H01M50/403 , H01M10/0468 , H01M50/46 , H01M50/463 , H01M50/531
Abstract: Discussed is a method for manufacturing an electrode assembly and an electrode assembly manufactured therethrough, and the method includes a corona treatment process of performing corona discharge treatment on opposite edges of a separator in a direction perpendicular to a progress direction for manufacturing the electrode assembly, a lamination process of alternately laminating an electrode and the corona-treated separator, and a bonding process of pressing the electrode and the corona-treated separator, which are laminated, to bond the electrode to the corona-treated separator, wherein, in the corona treatment process, corona is locally discharged to the opposite edges of the separator to form a corona-treated section and a corona-untreated section on the opposite edges of the separator.
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公开(公告)号：US20220412911A1
公开(公告)日：2022-12-29
申请号：US17771163
申请日：2020-12-29
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Jung Hoon LEE , Su Taek JUNG , Seok Jin KIM , Ji Hoon LEE , Sang Hyun KOO
IPC: G01N27/20 , B23K31/12 , B23K26/21 , H01M50/536 , H01M10/48
Abstract: A method for inspecting a welding defect of the present invention includes: a threshold resistance setting step (S100) of measuring a resistance of a welded portion of a sample group and deriving a threshold resistance value which becomes an evaluation standard of a weak welding; a resistance measuring step (S200) of measuring a resistance value of a welded portion to be inspected; and a step (S300) of determining as a weak welding if the resistance value measured in the resistance measuring step exceeds the threshold resistance value, wherein the threshold resistance setting step (S100) and the resistance measuring step (S200) include measuring a resistance using a microresistance measuring instrument having a resolution of nanoohm to microohm units.
The welding defect inspection method of the present invention shows excellent detection power for the welding defect by a weak welding.
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9.发明申请
公开(公告)号：US20220393143A1
公开(公告)日：2022-12-08
申请号：US17762927
申请日：2020-10-06
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Byeong Kyu LEE , Su Taek JUNG , Soon Kwan KWON , Hyun Kyung SHIN
Abstract: Discussed is an electrode assembly manufacturing method including an operation of stacking an electrode and separator to form an electrode stack and an operation of laminating the electrode stack while heating the electrode stack in order to manufacture an electrode assembly having increased force of coupling between the electrode and the separator while preventing damage to the electrode assembly.
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公开(公告)号：US20220069276A1
公开(公告)日：2022-03-03
申请号：US17610773
申请日：2020-05-12
Applicant: LG ENERGY SOLUTION, LTD.
Inventor： Byeong Kyu LEE , Su Taek JUNG , Soon Kwan KWON , Hyun Kyung SHIN , Won Nyeon KIM
Abstract: Discussed are an apparatus for manufacturing an electrode assembly, an electrode manufactured therethrough, and a secondary battery. The apparatus includes an upper and lower roll to press upper and lower portions of the stack, respectively; an upper support part to support the upper roll; a mover to allow the upper support part to move; a lower support to support both sides of the lower roll; a pressure detector provided on the lower support to measure a pressure applied to the lower roll, thereby detecting a pressure applied to the stack; and a controller to adjust the pressure applied to the stack by reflecting a pressure detection value detected in the pressure detector, the pressure detector comprising a first pressure detector to detect pressure applied to one side of the lower roll; and a second pressure detector to detect pressure applied to the other side of the lower roll.
