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    Pouch-type secondary battery having gas discharge means
    31.
    发明授权
    Pouch-type secondary battery having gas discharge means 有权

    公开(公告)号：US11177532B2

    公开(公告)日：2021-11-16

    申请号：US16753442

    申请日：2019-01-24

    Applicant: LG Chem, Ltd.

    Inventor： Sang Hun Kim ,  Myung Hwan Kim ,  Yong Su Choi ,  Na Yoon Kim ,  Hyung Kyun Yu

    IPC: H01M50/333 ,  H01M50/10 ,  H01M50/46 ,  H01M50/531 ,  H01M50/572

    Abstract: A pouch-type secondary battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator interposed therebetween, a pouch-type case configured to wrap around the electrode assembly, a first pair of insulative films disposed in a predetermined region of an edge of the pouch-type case, a positive electrode lead, one side of which is electrically connected to a positive electrode current collector of the electrode assembly and another side of which protrudes out of the case between the first films, a second pair of insulative films disposed in a predetermined region of the edge of the pouch-type case, a negative electrode lead, one side of which is electrically connected to a negative electrode current collector of the electrode assembly and another side of which protrudes out of the case between the second films, and a gas discharge member interposed between the first or second films.

    Pouch-shaped battery case for secondary batteries capable of discharging gas
    34.
    发明授权
    Pouch-shaped battery case for secondary batteries capable of discharging gas 有权

    公开(公告)号：US11094981B2

    公开(公告)日：2021-08-17

    申请号：US16495615

    申请日：2018-07-05

    Applicant: LG Chem, Ltd.

    Inventor： Soo Ji Hwang ,  Yong Su Choi ,  Sang Hun Kim ,  Hyung Kyun Yu ,  Na Yoon Kim ,  Min Hyeong Kang ,  Yong Kim

    IPC: H01M2/00 ,  H01M50/103 ,  H01M50/30 ,  H01M50/126 ,  H01M50/197 ,  H01M50/188

    Abstract: Disclosed herein is a pouch-shaped battery case, including an electrode assembly, an outer coating layer, a metal barrier layer, and an inner adhesive layer sequentially stacked with one another, a first adhesive layer interposed between the outer coating layer and the metal barrier layer, a second adhesive layer interposed between the metal barrier layer and the inner adhesive layer, an upper case and a lower case sealed to one another by thermal fusion at outer edges thereof, such that the electrode assembly is mounted between the upper case and the lower case, and a gas discharge member providing gas communication between an inside and an outside of the pouch-shaped battery case, the gas discharge member being disposed within a fused portion of the pouch-shaped battery case that is formed by the inner adhesive layer of the upper case and the lower case being thermally fused to one another.

    Venting device and method for manufacturing the same
    37.
    发明授权
    Venting device and method for manufacturing the same 有权

    公开(公告)号：US11539098B2

    公开(公告)日：2022-12-27

    申请号：US16637538

    申请日：2019-01-23

    Applicant: LG Chem, Ltd.

    Inventor： Na Yoon Kim ,  Yong Su Choi ,  Sang Hun Kim ,  Hyung Kyun Yu ,  Soo Ji Hwang

    IPC: H01M50/333 ,  H01M50/317 ,  F16K17/04

    Abstract: To solve the above problem, a venting device inserted into a sealing part of a pouch of a secondary battery according to the present invention includes: a housing inserted between confronting surfaces of the sealing part and sealed together with the sealing part; an element made of a metal and disposed in the housing and through which a passage is defined providing gas communication between an inside and an outside of the pouch; and a ball disposed at an outlet-side of the passage, the ball configured to open and close the passage, wherein, in the element, an edge of an inner circumference of a surface of the outlet-side of the passage is chamfered or filleted so as to face the ball, and the element includes: a surface treatment layer formed on the chamfered or filleted surface; and a layer made of a polymer and fused to the surface treatment layer.

    Venting device and method for manufacturing the same
    38.
    发明授权
    Venting device and method for manufacturing the same 有权

    公开(公告)号：US11355813B2

    公开(公告)日：2022-06-07

    申请号：US16647279

    申请日：2019-01-23

    Applicant: LG Chem, Ltd.

    Inventor： Yong Su Choi ,  Sang Hun Kim ,  Na Yoon Kim ,  Hyung Kyun Yu

    IPC: H01M50/317 ,  H01M50/103 ,  H01M50/333

    Abstract: A venting device inserted into a sealing part of a pouch of a secondary battery according to an embodiment of the present invention includes: a housing inserted between confronting surfaces of the sealing part so as to be sealed together with the sealing part, the housing being made from a metal plate; a gasket made of a polymer and disposed in the housing and through which a passage is defined providing gas communication between an inside and an outside of the pouch; and a plate spring made of a metal, the plate spring being disposed in the housing and assembled with the gasket, the plate spring being configured to open and close the passage in response to a change in an internal pressure of the pouch, wherein the housing includes a crimping part crimped together with the gasket on an upper end of the housing.

    Pouch-shaped secondary battery comprising electrode lead having asymmetrical notch formed therein
    39.
    发明授权
    Pouch-shaped secondary battery comprising electrode lead having asymmetrical notch formed therein 有权

    公开(公告)号：US11264682B2

    公开(公告)日：2022-03-01

    申请号：US16482531

    申请日：2018-07-02

    Applicant: LG Chem, Ltd.

    Inventor： Jong Pil Park ,  Kyoung Ho Kim ,  Min Woo Lee ,  Sang Hun Kim ,  Yong Kim

    IPC: H01M50/578 ,  H01M50/54

    Abstract: Disclosed herein is a pouch-shaped secondary battery including a battery case, an electrode assembly having a structure in which a positive electrode and a negative electrode are stacked in the state in which a separator is interposed therebetween, an electrode lead having an asymmetrical notch formed in a first surface of the electrode lead, the electrode lead being electrically connected to electrode tabs of the electrode assembly, the asymmetrical notch being configured to induce the rupture of the electrode lead, a lead film attached to the first surface and a second surface of the electrode lead, the lead film adhering the electrode lead to the battery case, the lead film including a first lead film located between the electrode assembly and the asymmetrical notch, and a second lead film located between the asymmetrical notch and a portion of the electrode lead that protrudes out of the battery case.

    Venting Device And Method For Manufacturing The Same
    40.
    发明申请
    Venting Device And Method For Manufacturing The Same 审中-公开

    公开(公告)号：US20200212399A1

    公开(公告)日：2020-07-02

    申请号：US16647279

    申请日：2019-01-23

    Applicant: LG Chem, Ltd.

    Inventor： Yong Su Choi ,  Sang Hun Kim ,  Na Yoon Kim ,  Hyung Kyun Yu

    IPC: H01M2/12 ,  H01M2/02

    Abstract: A venting device inserted into a sealing part of a pouch of a secondary battery according to an embodiment of the present invention includes: a housing inserted between confronting surfaces of the sealing part so as to be sealed together with the sealing part, the housing being made from a metal plate; a gasket made of a polymer and disposed in the housing and through which a passage is defined providing gas communication between an inside and an outside of the pouch; and a plate spring made of a metal, the plate spring being disposed in the housing and assembled with the gasket, the plate spring being configured to open and close the passage in response to a change in an internal pressure of the pouch, wherein the housing includes a crimping part crimped together with the gasket on an upper end of the housing.

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