Ballard Power Systems Inc. is a developer and manufacturer of (PEM) products for markets such as heavy-duty motive (consisting of bus and tram applications), portable power, material handling as well as engineering services. Ballard has designed and shipped over 400 MW of fuel cell products to date. .
（Ballard Power Systems），，。，250MW。 [pdf]
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A supercapacitor (SC), also called an ultracapacitor, is a high-capacity , with a value much higher than solid-state capacitors but with lower limits. It bridges the gap between and . It typically stores 10 to 100 times more or than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more than rechargeable batteries. [pdf]
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