Lithium-ion battery
research begins

Start of lithium-ion
battery development

Cylindrical lithium-ion
battery mass production

Developed world’s first
safety-reinforced separator

Created world’s first
cylindrical NCM application

Supplied world’s
first EV battery

Opened US
EV battery plant

Developed the world’s
first free-form battery

Started mass production of the world’s
first NCMA high-capacity batteries