Patent ID: 9306214
Filing Date: 2016-04-05
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A lithium ion battery having an electrode wound group in which a positive electrode, a negative electrode, and a separator are wound and an electrolytic solution provided in a battery container, a discharge capacity X of the battery being 30 Ah or more and 125 Ah or less, wherein the positive electrode has a current collector and a positive electrode composite applied to both surfaces of the current collector, the positive electrode composite contains a mixed active material of layered lithium nickel manganese cobalt composite oxide (NMC) and olivine lithium iron phosphate (LFP), a density of the positive electrode composite is 2.0 g/cm the discharge capacity X and a weight ratio Y (NMC/LFP) between the layered lithium nickel manganese cobalt composite oxide (NMC) and the olivine lithium iron phosphate (LFP) satisfy: