US 12,224,394 B2
Lithium secondary battery
Min Wook Lee, Daejeon (KR); Ju Young Yun, Daejeon (KR); Seok Jin Oh, Daejeon (KR); Joo Hwan Sung, Daejeon (KR); Hee Chang Youn, Daejeon (KR); Ji Min Park, Daejeon (KR); Hye In Ko, Daejeon (KR); Ran Eun Lee, Daejeon (KR); and Jin Young Park, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Jun. 7, 2024, as Appl. No. 18/737,132.
Claims priority of application No. 10-2023-0074462 (KR), filed on Jun. 9, 2023.
Prior Publication US 2024/0413380 A1, Dec. 12, 2024
Int. Cl. H01M 10/052 (2010.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0568 (2010.01); H01M 50/204 (2021.01); H01M 4/02 (2006.01)
CPC H01M 10/052 (2013.01) [H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/366 (2013.01); H01M 4/525 (2013.01); H01M 4/587 (2013.01); H01M 4/628 (2013.01); H01M 10/0568 (2013.01); H01M 50/204 (2021.01); H01M 2004/021 (2013.01)] 20 Claims
 
1. A lithium secondary battery comprising:
a positive electrode including a positive electrode active material;
a negative electrode including a negative electrode active material; and
an electrolyte,
wherein:
the lithium secondary battery has a nominal voltage of 3.68 V or greater; and
the lithium secondary battery is configured so that
VT represented by Equation (1) below measured after manufacturing a test module by stacking four lithium secondary batteries, each of which is fully charged by being charged to 4.35 V, is 4 Ah/sec or less:
VT=Ctotal/t  Equation (1)
wherein,
Ctotal is a total discharge capacity of a test module, and
t is time taken, after one lithium secondary battery disposed at the outermost periphery of the test module is heated so as to be ignited, from a point of time at which voltage of the lithium secondary battery disposed at the outermost periphery becomes 0 until the point of time at which the voltage of all four lithium secondary batteries in the test module becomes 0.