Maxwell Technologies Inc. is supplying ultracapacitors to Caterpillar for a high-efficiency energy management system that supports Caterpillar's hydra-electric technology in the Cat 6120B H FS— the industry's largest hydraulic mining shovel. The 1,400-ton shovel's energy management system incorporates 98 of Maxwell's 125-volt ultracapacitor modules to absorb energy during brief shovel movements and deliver stored electrical energy on demand to supplement the main power system.
"Caterpillar's use of ultracapacitors to support this energy-saving technology in the mining industry is a further demonstration of the versatility of our products across an increasingly diverse spectrum of industrial and transportation applications," said David Schramm, Maxwell's president and CEO.
Unlike batteries, which produce and store energy by means of a chemical reaction, Maxwell's ultracapacitor products store energy in an electric field. This electrostatic energy storage mechanism enables ultracapacitors to charge and discharge in as little as fractions of a second, perform normally over a broad temperature range (-40 to +65C), operate reliably up to one million or more charge/discharge cycles and resist shock and vibration. Maxwell offers ultracapacitor cells ranging in capacitance from one to 3,000 farads and multi-cell modules ranging from 16 to 125 volts.