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公开(公告)号：US10522880B2
公开(公告)日：2019-12-31
申请号：US15800608
申请日：2017-11-01
Applicant: GM Global Technology Operations LLC
Inventor： Daniel R. Thompson , John M. Moote , Michael P. Balogh , Mark A. Hughes, Jr.
Abstract: A method of detecting metallic lithium present on an electrode of a lithium ion secondary battery includes depositing a lithium-reactive solution including an oxidized fluorescent dye onto the electrode to form a coated electrode. Concurrent to depositing, the method includes reducing the oxidized fluorescent dye to form a reduced dye and a plurality of lithium ions. The method further includes, after reducing, drying the coated electrode to again form the oxidized fluorescent dye. After drying, the method includes exposing the oxidized fluorescent dye to ultraviolet radiation having a wavelength of from 100 nm to 500 nm to thereby illuminate and detect the metallic lithium. A lithium ion secondary battery system is also disclosed.
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公开(公告)号：US20190131669A1
公开(公告)日：2019-05-02
申请号：US15800608
申请日：2017-11-01
Applicant: GM Global Technology Operations LLC
Inventor： Daniel R. Thompson , John M. Moote , Michael P. Balogh , Mark A. Hughes, JR.
Abstract: A method of detecting metallic lithium present on an electrode of a lithium ion secondary battery includes depositing a lithium-reactive solution including an oxidized fluorescent dye onto the electrode to form a coated electrode. Concurrent to depositing, the method includes reducing the oxidized fluorescent dye to form a reduced dye and a plurality of lithium ions. The method further includes, after reducing, drying the coated electrode to again form the oxidized fluorescent dye. After drying, the method includes exposing the oxidized fluorescent dye to ultraviolet radiation having a wavelength of from 100 nm to 500 nm to thereby illuminate and detect the metallic lithium. A lithium ion secondary battery system is also disclosed.
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