Cylindrical lithium ion secondary battery
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United States of America Patent
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May 22, 2018
Issued Date -
N/A
app pub date -
Dec 4, 2015
filing date -
Jan 8, 2015
priority date (Note) -
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Abstract
A cylindrical lithium ion secondary battery, including a cylindrical can; an electrode assembly in the cylindrical can with an electrolyte solution; and a cap assembly sealing the cylindrical can, the cap assembly including a positive temperature coefficient (PTC) device connected to the electrode assembly, a cap-up connected to the PTC device, solder between the PTC device and the cap-up, and an exterior space without the solder on external circumferences of the PTC device and the cap-up.
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