Lasted edited by Andrew Munsey, updated on June 15, 2016 at 12:51 am.
Lead Acid Battery Breakthrough
Patented lead acid Battery breakthrough of Power Technology, Inc. claims smaller battery size, less weight, more ampere hour capacity, increased energy density, less lead, more environment friendly, superior recharge capabilities and longer life.
The battery is comprised of electrical current collectors constructed of reticulated vitreous carbon covered with a thin layer of a lead tin alloy. The current collectors create up to four times higher surface area for electrochemical reactions to take place compared to those in a typical lead acid battery, which results in a battery with higher efficiency and higher capacity meaning more electricity is generated. http://www.pwtcbattery.com/press/06-03-08_patentofficeallowability.php
The technology has the potential to replace standard lead-acid batteries and other chemistry based batteries.
Detailed technical discussion of technology (pdf) - published in the Journal of Power Sources, a peer reviewed, scientific article: "Electroplated reticulated vitreous carbon current collectors for lead-acid batteries: opportunities and challenges"
Pilot Plant - in the process of constructing a pilot plant in the city of Richmond, a suburb of Vancouver, British Columbia, Canada capable of manufacturing current collectors in commercial quantities for use in lead acid batteries.
US 7,060,391 B2 "Current collector structure and methods to improve the performance of a lead-acid battery" June 13, 2006
Abstract : A battery, a battery electrode structure, and methods to make the same. The product and method comprise applying a layer of lead-tin containing alloy to substrates for anodes or cathodes for lead-acid batteries, in which the substrates are porous or reticulated.
Power Technology, Inc. receives notice from United States Patent and Trademark Office of Allowability of Patent to its core battery technology - patent claims will be allowed (March 8, 2006)
Quoting from http://www.pwtcbattery.com/about/ Expanded at http://www.pwtcbattery.com/technology/
4 times greater surface area for electroplates
60-68% efficiency (compared to 30-40% for conventional batteries)
30-50% smaller and lighter
Environment friendly - Uses significantly less lead then typical lead-acid batteries
Recharge quickly at any standard household outlet
Utilizes same external case as conventional batteries
Can instantly increase energy output and replace conventional battery with no retrofitting of vehicle
Quoting from http://www.pwtcbattery.com/technology/
: "'The capability of a battery is directly related to the surface area of its current collectors that is in contact with battery paste. Our technology increases the surface areas of the current collectors without compromising their strength or resistance to vibration, erosion and loss of material.'
: "Conventional lead-acid batteries typically use lead molded into a grid pattern as a current collector. The surface area of a conventional lead current collector is approximately 4.6 cm(2) per cm(3). Our battery employs a high specific surface area, 18 cm(2) per cm(3), open-cell, reticulated vitreous carbon electrode structure coated with a lead-tin alloy to advance the reliable lead-acid chemistries to new performance levels by significantly increasing the utilization efficiency of PAM.
: "Reticulated Vitreous Carbon (RVC) - is an electrically conductive, highly porous, rigid, open cell, pure carbon, foam structure with a high melting point, high chemical inertness, and low bulk thermal conductivity. RVC has an exceptionally high void volume (97%), a high surface area combined with self supporting rigidity, low resistance to fluid flow, an ability to hold infused materials, and superior resistance to very high temperatures in non-oxidizing environments.
: "Our RVC grid offers up to four times higher effective surface area per unit volume as compared to a typical book-mould grid. A lead tin alloy is deposited by electrolysis on our pure carbon foam. In our current collector, the higher surface area and the shortened distance between the current collector wires and the active material particles, generate a higher utilization efficiency of the active material, which is a key parameter for the improvement of the lead-acid battery."
This photo compares PowerTech's RVC current collector, with its significantly increased surface area, to a conventional battery's solid lead current collector grid.
Quoting from http://www.pwtcbattery.com/applications/
Electric Cars and Trucks, Hybrid Engines and Other Alternate Energy Automobile Applications
Electric Powered Motorized Wheelchair Applications
Solar Energy Storage and Distribution Applications
Hydro Electric Generated Energy Storage Distribution
Fuel Cell and Other Green Energy Storage and Distribution
Wind Turbine Energy Storage and Distribution
PowerTech preliminary prototype batteries were independently tested by
B C Research, Inc of Vancouver Canada -
The Long-Yuan Shuang-Deng battery company of China - The test report states that the positive active material utilization efficiency of our battery was 63% as compared to the conventional lead acid battery's 35%.
The Catella Generics Centre of Battery Technology ("Catella') in Sweden - concluded that the PowerTech battery gives improved properties to lead-acid batteries. "The electrochemical utilization of the paste mass is considerably improved with the reticulated structure plates in lead-acid batteries. We have recorded an increase in the area specific capacity withdrawn by about 90 % in the current range 3 to 100 mA/cm(2). The plate weight is lower, by 20-25% for the positive and 45-50% for the negative, and the area larger, by about 30% for the positive as well as the negative, for the conventional plates used for comparison."
About Power Technology: Power Technology, Inc. is a Research and Development Company engaged in activities regarding alternative battery technology using materials with up to 50% less weight and significantly less lead content than conventional batteries. The Company is in the early stages of commercializing its technology, and has designed equipment and systems to manufacture its patent pending batteries. http://www.pwtcbattery.com/press/06-03-08_patentofficeallowability.php
The Company's battery technology will serve the $14 billion annual industrial battery market. Numerous applications exist for this advanced battery technology. The Company has multiple avenues to pursue to develop, commercialize and profit from this technology. These include: In house development, licensing rights to develop specific applications, joint venture partnerships to accelerate commercialization, selling patents and applications of the technology. http://www.pwtcbattery.com/about/
Publicly traded company Stock Symbol PWTC
Quoting from http://www.pwtcbattery.com/plant/
: "We do not intend to manufacture and sell our batteries. We plan to license our technology to other entities. We intend to discuss and explore various possible business combinations or transactions with established battery manufacturers. These may include joint venture agreements, licensing agreements, technology transfer agreements or other agreements by which established manufacturers acquire the right to employ our technology to manufacture batteries. We plan to provide prototype batteries and demonstrate our pilot plant equipment to established battery manufacturers. We intend to negotiate licensing agreements with manufacturers by which we would permit established battery manufacturers to make batteries using our proprietary technology. The business model for these agreements would involve the payment to Power Technology of a substantial up-front licensing fee and a royalty payment for each reticulated vitreous carbon current collector manufactured pursuant to the licensing agreement."
Power Technology Begins Manufacturing in New Pilot Plant - The plant has successfully manufactured reticulated vitreous carbon onto which a custom designed plating system applies a lead tin alloy to create patented current collectors for use in the company's advanced batteries. (BusinessWire Aug. 16, 2006)
109 N. Post Oak Lane
Houston, TX 77024
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