Production of High Capacity Li-ion Battery by Panasonic has gone into Mass-Production
As demand for lithium-ion batteries as a power source for mobile devices such as note PC and mobile phones is going into high gear due to its high energy density and light weight, the requirement for its robustness and safety in preventing abnormal heating will play a major role in its successful mass market acceptance in fulfilling the requirements for ever sophisticated and powerful mobile devices that will incorporate them. Based on this need, Panasonic Corporation has developed a 18650-type high capacity 3.1 Ah Li-ion battery and started its mass production this December. Panasonic achieved the high capacity and safety through use of its unique Heat Resistance Layer (HRL) technology by placing an insulating metal oxide layer between the positive and negative electrodes, whereby preventing the battery from overheating even if a short circuit occurs. The new NCR18650A 3.1 Ah battery has a nickel positive electrode and an energy density of 675 Wh/L. Panasonic has commercialized its high capacity 2.9 Ah Li-ion battery back in 2006 with a nickel positive electrode with energy density of 620 Wh/L. The new battery will contribute in further reduction in size and weight of portable devices.