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Exide Technologies and Maxwell Technologies form strategic alliance to develop and market integrated battery-ultracapacitor solutions

Exide Technologies and Maxwell Technologies have formed a strategic alliance. The two companies will work together in the development and marketing of advanced, integrated, battery-ultracapacitor energy storage solutions to be used in a wide array of transportation and industrial applications.

Principal elements of the strategic alliance include:

  • Joint identification and evaluation of market opportunities for integrated products;

  • Collaborative product development and testing; and

  • Joint calls on prospective customers to establish demonstration projects.

The integrated products developed through our alliance with Maxwell Technologies will provide a wide range of benefits for users who require the most that today’s battery technology has to offer. These benefits will include high energy density, rapid charging and discharging, extended operational life and superior performance in extreme temperatures.

—Paul Cheeseman, Exide’s Vice President, Global Engineering and Research

Exide Technologies, with operations in more than 80 countries, is one of the world's largest producers and recyclers of lead-acid batteries. With its lead-acid AGM (Absorbent Glass Mat) technology that allows for deep cycling combined with high charge acceptance, Exide supports Start-Stop vehicles, energy recuperation, intelligent charging and other advanced power train features to reduce CO2 emissions and fuel consumption.

We have always believed in the synergistic nature of ultracapacitors and batteries, and this relationship will enable us to significantly accelerate development of products embodying the benefits of both technologies.

—David Schramm, Maxwell’s president and CEO

Maxwell’s ultracapacitor products store energy in an electric field, which is unlike batteries that produce and store energy by means of a chemical reaction, 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), and operate reliably for one million or more charge/discharge cycles. Maxwell offers ultracapacitor cells ranging in capacitance from one to 3,000 farads and multi-cell modules ranging from 16 to 125 volts.



Maxwell capacitors are doing a great job in the Valeo/Peugeot stop/start system.


Interesting JV and interesting product. Combo supercaps-batteries may be an acceptable way to extended batteries life and allow the use of batteries with higher energy density.

Such combo would recovery more braking energy and extend EV range.


Direct response to the east penn product developed in australia. Ultrabattery.


To HarveyD:"Such combo would recovery more braking energy and extend EV range." Small addition: an intermediate power electronics unit (bidirectional buck-boost regulator) is required to make this "mixture" work. Considering the power level it could be pretty expensive. For car applications it is still not a very good compbo due to energy density but for marine applications (hybrid tug boats) - much better.

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