Strengthening and miniaturizing the reserve lithium battery

Answering to the evolution towards smaller and safer fuzes, Thales has started developments to ruggedize the current batteries and to miniaturize the internal concept to make a small Lithium Thionylchloride battery. In more detail this means :

Strengthening

Design improvements to meet even stronger requirements

Reserve batteries are activated by G-forces during acceleration of the application. Some of the requested lowest activation G-forces can be similar to the maximum forces occurring during an accidental drop or automatic loading (flick ramming) To meet the increasing requirements, one of the long-term developments in lithium reserve batteries at Thales Cryogenics is the ruggedizing of the current design.

To establish a safe operation of the batteries, Thales Cryogenics is improving the drop resistance of the batteries to withstand drops up to 5 meters, and still achieve 100% activation at forces as low as 800 G.

With this and other developments Thales Cryogenics continues to improve the quality of their batteries to meet even the most challenging requirements!

Miniaturising

Fuze evolution; Smaller, smarter and safer

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Thales Cryogenics also answers to the clear evolution on the battery market towards smaller, more efficient electronics requiring less energy, by developing smaller, compact batteries using the high energy density of the Li – SOCl₂ (lithium thionyl chloride) system.
The design goals are minimized dimensions :10 x 13 mm (smallest current dimensions 23 x 32 mm) delivering 9V under high spin (up to 100.000 rpm) and high acceleration forces (up to 50.000 G)

The challenges that arise from miniaturisation of the battery while at least maintaining its flexibility for various applications include:

• Maintaining a strong structure for optimum safety during handling.
• Withstand long storage periods (± 20 years) without losing any of its required performance.
• Ready to operate at specified voltage levels within a split second, absolutely failure-free under severe and versatile environmental conditions, any time.

Thales Cryogenics intends to present its latest findings and developments at major technology fairs and symposia. ( See news) These developments will provide the industry with new technological, cost-effective solutions to the ever-increasing demand of higher energy within minimized battery envelopes.