Toyota jidosha kabushiki kaisha (20250149595). LITHIUM SECONDARY BATTERY

LITHIUM SECONDARY BATTERY

Organization Name

toyota jidosha kabushiki kaisha

Inventor(s)

Junko Amano of Toyota-shi JP

LITHIUM SECONDARY BATTERY

This abstract first appeared for US patent application 20250149595 titled 'LITHIUM SECONDARY BATTERY

Original Abstract Submitted

the lithium secondary battery includes a positive electrode, a separator, a negative electrode, and an electrolytic solution. the negative electrode includes a current collector sheet. the thickness of the current collector sheet is 10 �m to 20 �m. the current collector sheet has a plurality of recessed portions. in each of the recesses, assuming that a diameter on a surface is a, a center-to-center distance with another recess closest to the recess is b, and a depth is d, and assuming that an average value of the diameter a is a, an average value of the center-to-center distance b is b, an average value of the depth d is d, and a thickness of the current collection sheet is c, the following expressions (1), (2), and (3): 0.05≤a≤0.18 (1), b≤0.18 (2), and d/c≥3/5 (3) are satisfied.