Volvo selects Ener1 LiIon battery for C30 electric car John …

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Chang'an CX30 EV Electric Cars

Volvo selects Ener1 Li-Ion battery for C30 electric car

Ener1, Inc. said the Volvo C30 Electric car is powered by Ener1 s EnerDel battery. Volvo President and CEO Stefan Jacoby said a test fleet of C30 vehicles will go on the road in the U.S. later this year. Volvo and Ener1 have been working on the C30 in Europe and the U.S. for the past two years.

A crash-tested C30 was displayed at the Detroit Auto Show. The car was tested at Volvo Cars crash test laboratory in Sweden in December 2010 with a fully charged EnerDel lithium-ion battery and was subjected to a 40-mph offset frontal collision with a barrier.  The test produced the results expected by the companies engineers – the front deformed and distributed the crash and both the batteries and the cables, which are part of the electric system, remained intact after the collision.

Our tests show it is vital to separate the batteries from the electric car s crumple zones to make it as safe as a conventional car, said Jacoby.  We are the first car maker to show the world what a truly safe electric car looks like after a collision with high-speed impact.

To ensure the battery is safely located outside of the crumple zones, Ener1 developed a split battery specifically for Volvo with half the battery located in the central tunnel between the seats and the other half under the rear seats where the gas tank would normally be located.  The battery features Ener1 s battery management system, which is integrated with the C30’s electronics and vehicle control systems.  In the event of a collision, the crash sensor in the car cuts power in 50 milliseconds by the same signal that deploys the airbag.

The system has several fuses that cut directly if a ground fault is detected, such as a damaged cable coming into contact with the body frame.  The battery management system also optimizes capacity and actively prolongs cell life, monitors and reports the state of health and charge, controls safe and efficient pack re-charging and the cooling system for safe operating temperatures.  It has multiple levels of redundancy built into its control protocols for extra safe operation.

Chang'an CX30 EV Electric Cars

Our relationship with Ener1 is founded on the quality and safety of the company s technology and chemistry, said Lennart Stegland, president of Volvo Cars Special Vehicles. We have worked closely together as we have developed the C30 and both sides have learned a great deal from each other in this collaboration.

Stegland said Volvo looked closely at suppliers of lithium ion cells before selecting Ener1. He said non-reactive chemistry was a top priority, and Ener1’s EnerDel was selected for its combination of stability and energy storage capacity. He said other suppliers were very efficient in their energy storage, but their cells were much more reactive.

He also praised the performance of EnerDel’s batteries at extreme temperatures, and the batteries’ longevity.

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