US 11,658,280 B2
Lithium secondary battery and card with built-in battery
Yukinobu Yura, Nagoya (JP); Masahiko Hibino, Nagoya (JP); and Yuki Fujita, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK INSULATORS, LTD., Nagoya (JP)
Filed on Jul. 2, 2020, as Appl. No. 16/919,552.
Application 16/919,552 is a continuation of application No. PCT/JP2019/007460, filed on Feb. 27, 2019.
Claims priority of application No. JP2018-063171 (JP), filed on Mar. 28, 2018.
Prior Publication US 2020/0335768 A1, Oct. 22, 2020
Int. Cl. H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/66 (2006.01); H01M 50/46 (2021.01); H01M 50/54 (2021.01); H01M 10/0525 (2010.01); H01M 50/55 (2021.01); H01M 50/553 (2021.01); H01M 50/429 (2021.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/119 (2021.01); H01M 50/124 (2021.01); H01M 50/121 (2021.01); H01M 4/02 (2006.01)
CPC H01M 4/131 (2013.01) [H01M 4/133 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/429 (2021.01); H01M 50/46 (2021.01); H01M 50/54 (2021.01); H01M 50/55 (2021.01); H01M 50/553 (2021.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lithium secondary battery comprising:
a positive electrode plate which is a lithium complex oxide sintered plate;
a negative electrode layer containing carbon;
a separator interposed between the positive electrode plate and the negative electrode layer; and
an electrolytic solution with which the positive electrode plate, the negative electrode layer, and the separator are impregnated,
wherein the positive electrode plate has a thickness of 70 to 120 μm, the negative electrode layer has a thickness of 90 to 170 μm, the lithium secondary battery has a rectangular flat plate shape with each side having a length of 20 to 55 mm, the lithium secondary battery has a thickness of 350 to 500 μm, and the lithium secondary battery has an energy density of 200 to 300 mWh/cm3.