Methods related to X-ray sensitive battery separators
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United States of America Patent
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Mar 1, 2016
Grant Date -
Jan 14, 2016
app pub date -
Sep 21, 2015
filing date -
Jan 19, 2010
priority date (Note) -
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Abstract
A method for detecting the position of a separator relative to electrodes in a secondary lithium battery includes the steps of: providing a secondary lithium battery including a positive electrode, a negative electrode, a X-ray sensitive separator located between the electrodes, and a can or pouch housing the electrodes and separator, the X-ray sensitive separator comprising a microporous membrane having a X-ray detectable element dispersed therein or thereon, the X-ray detectable element comprising at least 2 and no greater than 20 weight % of the membrane; subjecting the secondary lithium battery to X-ray radiation; determining the position of the separator relative to the electrodes; and approving or rejecting the secondary lithium battery based upon the position of the separator relative to the electrodes.
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