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car roof battery

26.10.2013

Volvo engineers have developed doors and a condenser roof that will replace the car's conventional electrical systems. The new technology will reduce the car's weight by 15% and add 130 kilometers to it.

Today, every major automaker offers hybrid cars to customers, and some offer all-electric cars. All these cars are built around lithium-ion batteries, usually in the form of a massive block placed at the bottom of the car. The extra weight of the battery reduces the fuel efficiency of hybrids and electric vehicles, and sometimes worsens their handling.

Volvo offers a completely new concept: the placement of batteries in the hood, doors and roof of the car. A prototype S80 equipped with a battery roof is currently being tested.

With conventional lithium-ion batteries, it is impossible to achieve the safety of a car of this design - a strong blow to the doors, hood and roof is very likely in the event of an accident and can lead to a fire in the car, chemical burns to passengers. However, there is no mention of lithium-ion batteries in the Volvo concept, instead it is planned to use innovative supercapacitors based on a combination of carbon fibers and polymer resin. Layers of these materials form an energy store that can be shaped to match the contours of the car body. Moreover, supercapacitors are not only safer than Li-ion, but also have an increased strength characteristic of carbon composites. Thus, the supercapacitor not only stores energy, but also serves as a power frame of the body, increasing the safety of passengers.

The battery body concept is very flexible: it can be used in both all-electric vehicles and hybrids. In the first, the batteries will be charged from the network, providing a range of up to 130 km. Such a car should be cheaper than current lithium-ion electric vehicles. In a hybrid car, the supercapacitors will be charged from the grid or during braking, and will replace the usual components of the car's 12-volt electrical system. The hybrid will be able to use "free" braking energy for subsequent acceleration of the car, which will save fuel.

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