22/12/2011

BATTERIES FOR EV: The CEA is a global challenge

"In one year, the CEA left the laboratory pre-industrial revolution, so that its platform and its employees," said Mattera Florence, responsible for the transport of the CEA.Dedicated to Grenoble, over € 20 million investment, including the extension of a research platform for the production of a new generation of lithium-ion batteries for electric vehicles - has done since September 2009.


Hundreds of scientists for the Department of Transportation hired 200 engineers working today. ECA and began a partnership with Renault for Flins battery technology (Yvelines) to improve.


Research Focus


Research on electric SONY VGP-BPS13 batteries is one of the "priority sectors" of the CEA, which fell to the emergence of a market in all major global manufacturers meet, said the director of the CEA in Grenoble, Jean Therme. But three years ago, CEA, on drums for a decade about to leave this area of ​​research by the lack of opportunities in the industry, he said.


"Manufacturers may not have the importance of this activity are seen. And then there was the Grenelle Environment "in 2007, which provided" the development of this important industrial sector, after the bath.


The committee hopes to one day compete with the Asians, with its experience in mobile phone batteries, "are difficult in the market for batteries for electric vehicles," admits Ms. Mattera.


"Europeans have a deck of cards. The battle for the first generation of batteries, "a range of 150 kilometers," not lost, "he said.


Iron-Phosphate batteries


The position of CEA as the manufacture of wholesale batteries based on iron phosphate, a material that is presented is based as the face of competitive and secure Asia-oriented manganese.


Use a great job on the possibilities of technology to reduce costs and increase reliability has been done, the outlook for the year 2015 to produce the batteries for a range of 300 km for a pure electric car, says Mattera.


Also Chambery, engineers from CEA, the National Institute of solar energy, batteries subjected to all kinds according to the extreme conditions (cold, heat) and practice "post-mortem evidence of" life expectancy and understanding of recycling.


Electric Car: The Challenges of batteries


What VET studies Energies new batteries?


V-MS: We are working on two batteries, a lot of energy, such as nickel-metal hydride or lithium-ion battery, the power of money supercapacitors. These studies are hybrids of the demonstrator project and prototype electric vehicles conducted to test and validate technologies.


Our goal is twofold: models and electrochemical phenomena in thermal batteries that can be integrated into simulation platforms, the size of the vehicle architecture, and improving the diagnosis of the current state of the battery to describe development.


Why should properly assess the health and state of charge of batteries?


V-MS: in hybrid vehicles, battery storage provides a reversible, intermittent and energy. To optimize the management, it is important to know, accurately, and at any time, depending on battery condition, "the state of charge", and the advantages of creating a way for maximum " health "of the actual Pavilion DV4 battery is his life. But today it is difficult in real time a reliable estimate of the two parameters. This leads to large safety margins for producers, reducing the range of batteries do. If the integrated monitoring of these parameters (BMS) was correct, it would be possible to run longer, reducing the size of the battery - which is now too big - to change less often, which increases costs.


You have the results in this area?


V-SM: In-house, in the context of the ALIDISSI (National Research Agency) NRA we conducted in 2008-2009 with the CEA, CNRS and the living company, we have a method for diagnosing board developed the electrical impedance. It involves applying a current to the battery and the resulting voltage to increase the amount is a cost accuracy, reliability, and health. Already validated in the laboratory, this work would soon lead to a prototype sensor.


Another problem is the aging of batteries ...


J-B: Yes. Let us examine this phenomenon in the context of the ANR research. This is on a dynamometer to simulate the aging of HP 484170-001 batteries for hybrid vehicles, the reproduction of an accelerated phase of activity, especially the acceleration and braking of the vehicle. Thus, these data and models for predicting lifetime to incorporate these elements in real operating conditions. We also have phases where immobilization of the battery is broken.


Give examples of projects, demonstration ...


V-MS: The bottom of the demonstration project ELLISUP ADEME (Agency for Environment and Energy Management Agency), followed by Irisbus Iveco, for example, in 2012, is a prototype of 12 meters to reach all electric buses. We offer a variety of ways: characterization of cells of the battery thermal modeling of the package and the sizing of the cooling system and finally the development of control algorithms.


JB: We work from the project HYDOLE PSA Peugeot Citroën. This vehicle is designed to operate in electric during the week, when the drivers to work, but uses heat stroke or other hybrid, especially on weekends. With the CEA and EDF, we compare different battery technologies currently are being tested on the test beds for different operating systems and aging.


Clould Tags:HP DV4 battery,wholesale batteries


 

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