As early as 1985, Sony was committed to the research and development of lithium-ion batteries.
1988 Sony applied for the first patent of lithium battery and named the new product as lithium-ion battery.
199 1 After six years of research and development, Sony's first lithium-ion battery product was launched.
1995, a fire broke out in the Sony Koriyama project, and1100,000 lithium-ion batteries were burned, so the safety of lithium-ion batteries was put on the agenda.
In 20 16, Sony sold its battery division. Due to Panasonic's control of the high-end passenger car battery market and the cost war between LG, Samsung and China manufacturers, Sony's battery division, which suffered losses continuously, had no hope of turning losses and sold it to Murata's battery division.