Just last week EEStor, the secretive battery company, was granted a US patent for their electric-energy storage unit, of which no one outside the company has seen so much as a working prototype. The patent (link here to the PDF) has some incredible information about the technology that has been promised by EEStor, but not clearly spelled out before.  The capacitors have some crazy individual unit specs! They are rated for 3500 V, weigh about 5 grams each and have 1 milli Farad. This is absolutely unbelievable in a world where you normally have to make a choice between high capacitance, high voltage, or small size, they claim to have all three.

The core ingredient is an aluminum coated barium titanate powder immersed in a polyethylene terephthalate plastic matrix. The EESU is composed of 31,353 of these components arranged in parallel. It is said to have a total capacitance of 30.693 F and can hold 52.220 kWh of energy. The device is said to have a weight of 281.56 pound including the box and all hardware. Unlike lithium-ion cells, the technology is said not to degrade with cycling and thus has a functionally unlimited lifespan. If true this is an incredible breakthrough in technology. Of course being granted a patent and bringing a product to market are two very different things.

EEStor notes “the present invention provides a unique lightweight electric-energy storage unit that has the capability to store ultrahigh amounts of energy.”

The core ingredient is an aluminum coated barium titanate powder immersed in a polyethylene terephthalate plastic matrix. The EESU is composed of 31,353 of these components arranged in parallel. It is said to have a total capacitance of 30.693 F and can hold 52.220 kWh of energy. The device is said to have a weight of 281.56 pound including the box and all hardware. Unlike lithium-ion cells, the technology is said not to degrade with cycling and thus has a functionally unlimited lifetime. It is mentioned the device cannot explode when being charge or impacted and is thus safe for vehicles.”

via DailyHybrid



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