Toyota’s January 22, 2010 with the “Japan International Automotive Electronics Technology Exhibition” and the “EV and HEV Drive System Technology Show (EV JAPAN)” (1 20 ~ 22, Tokyo Big Sight International Exhibition Center, the organizer: Reed Exhibitions Japan) at the same time holding the technical seminar, on the company’s lithium-ion rechargeable battery delivered a speech on the development trend.
Toyota’s HV Materials Technology Department Minohara Hung-Min to “Toyota’s HV with rechargeable batteries and Development Trends” in the title, first of all a brief introduction of the Toyota’s environmental program and the nickel-metal hydride (Ni-MH) battery replacement situation, and then focuses on The company’s lithium-ion rechargeable battery development program.
Toyota’s lithium-ion rechargeable battery was first applied to the “Yaris (Vitz)” no-idling vehicles, from February 2003 to December 2008, a total of 4900 group produced. The current monthly production of 60 ~ 100 groups. Each cell group consists of four unit structure, cell voltage of 3.6V, current capacity of 12Ah, power density 2250W/kg, the energy density of 74Wh/kg.
The company started from the end of 2009, “Prius plug-in hybrids,” is equipped with a hybrid car is currently being developed lithium-ion rechargeable battery. This although not open the battery of specific targets, but said before the adoption of real vehicle is equipped with five locations around the world conducted a three-year evaluation of the durability testing, has confirmed that no problem.
According to reports, the test is to use the 150 test vehicle in Japan, the United States, Canada, Germany and Spain, and the total travel distance of about 10.5 million km. Vehicles traveling from the furthest traveling in the United States had 57 million 4000km. In addition, some vehicles is also envisaged that most of the time in parking situation, only moving a few hundred km. Toyota Minohara indicated that through -30 ~ 40 ℃ ambient conditions of the test, “was finally developed to meet all the requirements of lithium-ion rechargeable battery.” Battery deterioration Minohara also said, “We had a period of three years, more than 500,000 km driving distance of the inner resistance of evaluation, to determine the final outcome of the battery as compared with the initial value changed little.”
With regard to future plans for the automotive, Toyota is currently working with to reduce costs and to elaborate on the cars, while also considering a new generation of electric cars and personal mobility vehicle, used. Among them, electric vehicle batteries goal is to mass production around 2012. The corporation to consider a two-stage development of batteries, “First of all understand the limits of existing technology, and then to achieve the final form of the battery, in-depth field of scientific research beyond the limits of existing technology.”
