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High-power Battery for Ecall Systems and UAVs

Introducing the TLM battery Tadiran Batteries – battery manufacturer from Buedingen / Germany – presents the lightest and smallest high-power battery available and hereby offers a reserve power plant that seems to be custom-made for Ecall systems in cars and UAV recovery systems.

Büdingen, September 19th, 2008 – Emergency batteries seem to be heading for a period of prosperity. The European Community is discussing to make Ecall systems mandatory for new cars. As in approximately 25 % of those cases where the Ecall system is needed after a car accident the car battery is broken or disconnected, there will probably be no way to bypass an emergency battery that feeds the system. The requirements for a suitable emergency battery are tough: It has to be small (AA-size or smaller), reliable (8 years battery life minimum), powerful (at least 5 Watts for 11 minutes) and capable of delivering this performance in a wide temperature range from approximately –20 °C to +85 °C.

The demand for applicable emergency batteries is increased by another branch: UAVs (= Unmanned Aerial Vehicles), too, need reliable back-up power in the event of catastrophic main engine failures. They require battery packs to power the UAV's recovery system that enables navigation and control systems to continue operating so the damaged craft can glide to a safe landing away from enemy territory. The power management solution must deliver high energy density and capacity while also offering the ability to withstand extreme environments.

Such a battery is provided – as only supplier at the moment – by Tadiran Batteries GmbH from Buedingen / Germany with its TLM-1550HP high-power lithium AA-size battery being on the market for about two years. It is characterized by five qualities predestining battery packs assembled from the Tadiran TLM Series of high-power lithium batteries for that extreme fields of applications.

First of all, it delivers 2W-hours of energy with an open circuit voltage of 4.0 V and is capable of handling pulses of up to 15 A, and 5 A maximum continuous current at 3.2 V what is sufficient energy. A barrier too high for most available batteries in the market.

Secondly, the cells have instantaneous voltage response after prolonged storage: they provide up to 20 years of service life.

Thirdly, these cells are safe, rugged, and capable of withstanding extreme temperatures from –40 °C to +85 °C. The cell design features a glass-to-metal hermetical seal instead of a less reliable crimped elastomer gasket.

Fourthly, the battery can be periodically tested, enabling system readiness to be confirmed without fully discharging the battery.

And fifthly, it is notably flexible: It can be easily combined in series or parallel to create custom battery packs in virtually any shape or size. Smaller cells, including sub-1/2 AA and 2/3 AA sizes (with 15 mm diameter), are now available. As the battery is lighter and smaller than other batteries, it leaves e. g. more room for the payload of sensors, cameras, communications equipment and so on in UAVs.

With an annual turnover of 20 to 25 mill. € Tadiran Batteries GmbH is one of the leading manufacturers of primary (non rechargeable) lithium batteries in Europe. It employs approx. 100 people and has its production facilities in Buedingen, close to Frankfurt, Germany.

Together with its parent company Tadiran Batteries Ltd., the company is continuously aiming to improve its performance with regard to products, highest quality and customer service. The company is committed to the world class philosophy, the management system is certified to ISO 9001 and – since 1999 – to ISO 14001.

The company is a leader in the development of lithium batteries for industrial use. It is fully owned by Saft groupe S.A. (Euronext: SAFT).

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