Battery Japan: View of A123, Ener1 and SB Limotive
10 March 2011
Battery Japan: View from Nissan, Honda and Toyota
09 March 2011
Organized by Reed Exhibitions Japan, Battery Japan 2013 was part of the World Smart Energy Week 2013 that attracted 1,585 exhibitors from 26 countries. The Battery Japan trade show brought together major companies and experts within the rechargeable battery world to present and discuss the latest developments in rechargeable batteries, capacitors and battery technologies of all kinds. cars21.com summarises keynote presentations from two major Japanese companies.
Toyota keynote presentation: approach to next generation green vehicles and expectations for secondary battery development
Managing officer at Toyota, Shigeki Suzuki, reviewed Toyota’s strategy which will see hybrid technology become a core technology and basis for PHV, EV and FCHEV platforms. For the first time in history the annual sales of hybrid vehicles soared to over 1 million units in 2012.
While still pushing for hybrids and PHEV, Toyota sees the potential of EVs in the compact size and short driving distance market. Toyota’s new “eQ” model, introduced in Decemeber 2012, achieved the world’s best electric consumption rate, 104Wh/km (JC08). The passenger car category is the main target for Toyota’s advanced HEV and PHEV technology. The future of heavy-duty and long distance delivery trucks, or route busses, in other words large vehicles with long driving distance is seen to be hydrogen (FCHEV).
Secondary battery for green vehicles
The energy density of Li-ion batteries is 1/50 of gasoline. The next generation of vehicles requires substantial improvements in energy or power density. Toyota’s activities in this area are focused mainly on solid state battery (SSB) and Li-Air battery development. SSB can realize compact packaging and high voltage in a cell with series connection of layered electrodes. The future issues to resolve remain cycle performance and scaling-up and cost of solid electrolyte and production. According to Toyota, it is possible to save the cell space by using an oxygen cathode and a lithium metal anode. The current state of development of Li-Air batteries shows high energy density but very limited power density. Toyota managed to clarify the reaction mechanism and reduce the side reaction with the radical intermediate. Challenges with Li-Air batteries to be addressed are mainly reduction of the irreversible capacity, improving the output-power performance and anode reaction control.
Panasonic group keynote presentation: current status and future prospects for rechargeable battery technologies
Panasonic’s vice president and CTO, Munehisa Ikoma, presented the line up of rechargeable batteries for eco-cars including the Ni-MH battery systems for HEV and Li-ion battery modules/systems.
According to Panasonic the market for Lithium-ion batteries in FY 2011 reached 1 trillion JPY (8.2 billion EUR). The automotive sector is forecast to grow from 2GWh in FY 2011 more than seven times to 15GWh. Although the Li-ion batteries’ share of the automotive industry was relatively small in 2011, it is expected to become nearly half of the 1.5 trillion JPY market by 2015. Interestingly, the electric energy storage is forecast to grow 25 times in the same period, although it will reach a much lower total capacity of 1.1GWh in 2015.
Panasonic’s business strategy is to propose and supply combinations of battery, module and systems, to many eco-friendly cars. The differentiation is made on the battery technology level and on the module/system level. The final product best reflects needs for idling stop vehicles, whether HEV, PHEV or EV.
The success of this strategy and Panasonic’s expertise in development of rechargeable batteries for EV, HEV and PHEV is clearly demonstrated by the list of customers and vehicle models: Tesla (Model S, Roadster), Mazda (Demio EV), Toyota (eQ EV, Prius PHEV), Audi (Q5 HEV), Ford (Fusion, C-Max PHEV), Porsche (Cayenne, Panamera HEVs), VW (Touareg HEV), etc.