US 12,444,792 B2
Nonaqueous electrolyte rechargeable battery and method for manufacturing nonaqueous electrolyte rechargeable battery
Yusuke Takashi, Toyohashi (JP); and Takaaki Izumoto, Toyohashi (JP)
Assigned to TOYOTA BATTERY CO., LTD., Kosai (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed by PRIMEARTH EV ENERGY CO., LTD., Kosai (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed on Sep. 9, 2022, as Appl. No. 17/942,049.
Claims priority of application No. 2021-148901 (JP), filed on Sep. 13, 2021.
Prior Publication US 2023/0079617 A1, Mar. 16, 2023
Int. Cl. H01M 50/131 (2021.01); H01M 10/04 (2006.01); H01M 10/0525 (2010.01); H01M 10/0587 (2010.01); H01M 10/44 (2006.01); H01M 50/103 (2021.01); H01M 50/414 (2021.01); H01M 50/46 (2021.01); H01M 50/466 (2021.01); H01M 50/491 (2021.01)
CPC H01M 50/131 (2021.01) [H01M 10/0468 (2013.01); H01M 10/049 (2013.01); H01M 10/0587 (2013.01); H01M 10/446 (2013.01); H01M 50/103 (2021.01); H01M 50/414 (2021.01); H01M 50/46 (2021.01); H01M 50/466 (2021.01); H01M 50/491 (2021.01); H01M 10/0525 (2013.01); H01M 2220/20 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A nonaqueous electrolyte rechargeable battery, comprising:
an electrode body;
a nonaqueous electrolyte; and
a rectangular box-shaped battery case accommodating the electrode body and the nonaqueous electrolyte, wherein
the electrode body includes a positive electrode including a positive base and a positive composite material layer, a negative electrode including a negative base and a negative composite material layer, and a porous resin separator disposed between the positive electrode and the negative electrode, the electrode body having a low profile when the positive electrode, the negative electrode, and the separator are laminated and rolled,
when a spring constant of the nonaqueous electrolyte rechargeable battery with a load of 316 to 210 N/cm2 is referred to as a spring constant H and a spring constant of the nonaqueous electrolyte rechargeable battery with a load of 95 to 74 N/cm2 is referred to as a spring constant L, a ratio L/H of the spring constant L to the spring constant H is greater than or equal to 0.34 and less than or equal to 0.41.