Leyden Energy Li-Ion superior energy density,longer run time

[Lock]

http://www.leydenenergy.com/

LEYDEN ENERGY IS REVOLUTIONIZING LI-ION BATTERIES WITH PATENTED TECHNOLOGY

Leyden's unique cell technology demonstrates the longest run time and superior cycle life for more than 1000 cycles while maintaining excellent performance in high heat environments continuously up to 60°C.

The end result is highly efficient energy storage products with improved safety due to excellent thermal stability.

Leyden Technology provides all the safety and performance of Lithium Iron Phosphate batteries yet features higher energy density 225 Wh/Kg and >400 Wh/l.

Leyden 42V 1.7kWh Li-Ion Battery Pack

Leyden Energy's high power battery pack is built using their cutting edge patented High Temperature cells utilizing a highly stable Lithium Imide chemical design. The 42V Li-Ion pack has 1.7kW capacity with a cycle life up to 700 charge/discharge cycles and a 3 year calendar life. It can be recharged in 3 hours at 40A and operated in environments with temperatures ranging from -20°C to 60°C and relative humidity levels up to 95%. The pack has overheat protection including 12 temperature sensors strategically located in the pack monitor and built-in PTC for over current protection, in addition to overload and short circuit protection. The battery pack is ideal for electric vehicles and renewable energy management systems and is currently in production.

Leyden's 1.7kWh has an innovative 48V Battery Management System (BMS) that is capable off: Communication: SMBUS, CANBUS, RS485
Protection: Over voltage
Under voltage
Short circuit
Over current
Temp-over/under
Cell Balancing: Active to 10mv per cell
500 MA capable (upgradeable)

http://www.cnbc.com/id/42590191

Lithium-Ion Battery Maker Leyden Energy Unveils Its First High-Performance Cylindrical Battery for Electric Vehicles High-Performance, Long-Life Batteries to Power SSI Racing's Dream Car at the 2011 Toyota Grand Prix
Published: Thursday, 14 Apr 2011 11:00 AM ET
LONG BEACH, Calif., Apr 14, 2011 (BUSINESS WIRE) -- Leyden Energy, Inc., a leading manufacturer of advanced lithium-ion batteries for the consumer electronics, energy storage and electric vehicle (EV) markets, announced today that it will provide its industry-leading high energy density, high-performance cylindrical battery cells for SSI Racing's marquee Dream Car at the annual Toyota Grand Prix of Long Beach. The Dream Car, which holds three world records and accelerates from 0-60 MPH in three seconds, will be on display at the Long Beach Convention Center from April 15 to 17.

SSI Racing's use of Leyden Energy's cylindrical battery cells in SSI Racing's Dream Car--a converted 1965 coupe--will be the first time that Leyden Energy's cylindrical form factor will be deployed in an electric vehicle. Backed by a market-leading warranty, Leyden Energy's batteries are designed to last longer than other leading batteries and have the ability to operate at higher temperatures, making them suited to commercial and car-kit electric vehicles.

Leyden Energy's proprietary Imide technology delivers high power and high energy density enabling its automotive batteries to outperform other leading lithium-ion batteries and deliver twice the drive time than iron-phosphate batteries.

"All of SSI Racing's cars are crafted with blood, sweat and tears, so we are very careful about the batteries we use to deliver the power and superior performance our cars require," said Michael Kadie, owner of SSI Racing. "As we look forward to breaking more records with our converted cars and introduce our conversion kits to the public, we are confident in Leyden Energy's ability to deliver a market-leading product we can rely on." Also on display at the Grand Prix will be the E2/SSI Electric Conversion Kit featuring the E2 drive train and the new Interchangeable Leyden Battery Module, which is designed to be utilized in a number of different configurations for cars and small trucks. Once systems have been tested and perfected, the E2/SSI Electric Conversion Kit and the Interchangeable Leyden Battery Module will be the first complete EV conversion kit available for the public to purchase.

"With the Obama administration setting the goal of one million electric vehicles on the road by 2015, Leyden Energy is proud to be at the forefront of commercializing a battery that can help make this goal possible by affordably meeting the high demands of electric vehicle manufacturers," said Aakar Patel, president and CEO of Leyden Energy. "Through our partnership with SSI Racing we can demonstrate the exceptional performance and reliability of our high density batteries, proving that you do not have to sacrifice power to be environmentally friendly." About Leyden Energy, Inc.

Leyden Energy is a manufacturer of advanced lithium-ion batteries for the consumer electronics, energy storage and electric vehicle (EV) markets. The company's patented and proprietary cell technology addresses the shortcomings of previous generations of lithium-ion products by offering improved energy density, superior product life and optimal safety, even in high temperature environments.

In 2011, Leyden Energy was recognized by the United States Advanced Battery Consortium (USABC), in the form of a government grant award for lithium-ion advanced development with a specific focus on developing electromechanical energy storage technologies which supports the commercialization of hybrid and electric vehicles. Backed by Lightspeed Ventures, Sigma Partners and Walden Capital, Leyden Energy's pilot manufacturing, testing facility and executive offices are located in Fremont, Calif. For more information, visit http://www.leydenenergy.com.

SOURCE: Leyden Energy, Inc.

Leyden products use a conductive graphitic foil to increase reliability and also offer outstanding thermal conductivity that is well beyond its aluminum cathode current collector predecessor.

Leyden Polymer Pouch Battery

Leyden Energy utilizes advanced patented Lithium Imide electrolyte technology to develop their unique Pouch battery design. Leyden's Pouch battery has both a gravimetric and volumetric advantage compared to traditional Li-Poly cells resulting in 25% longer run time. At 36 months, the calendar life of Leyden's Pouch battery is three times longer than the product life of competitive Li-Poly batteries. The ultimate manifestation of this product's superb design and versatility is that there is no potential for swelling. Ballooning is a problematic condition in many Polymer products that results in mechanical failure, but Leyden's Pouch batteries will maintain their form factor under even the harshest conditions. The Polymer Pouch battery is best suited for small consumer electronics including Tablet PCs, smart phones and additional mobile devices. The Pouch battery is currently available and rapid prototypes can be developed at the Fremont, CA facility.

Contact Leyden Energy at sales@leydenenergy.com for more information on the Polymer Pouch Battery.

Nominal Voltage: 3.7V
Nominal Capacity: 160 mAh to 14 Ah
Operating Temperature: -30°C to 60°C
Charging Temperature: -20°C to 60°C
High Cycle Life: >500 Cycles (100% DOD))
High Calendar Life: > 10 Years (Calculated)

 

[Lock]

Captured this image from the slide show/header on the Leyden site:


...looks like the Brammo Enertia

Brammo Enertia specs say "Valence Brand - Lithium Iron Phosphate"

Brammo Enertia Plus specs say "Brammo Powerâ„¢ batteries"

Ahhh... here:
http://plugbike.com/2010/07/29/brammo-empulse-rr-packn-heat-at-e-power/

The Empulse RR battery pack appears to be one solid box that replaces the 8 cells in the Empulse 8.0. It may be two boxes mounted with one above and one below but it is hard to tell. Craig Bramscher told me the pack is over 10 kWh. A&R says 12.5 kWh.

The back voltage is also higher than the Empulse 8.0 but Craig did not disclose how much higher. Judging by the stickers on the front, the pack contains Leyden Energy cells. Their website claims their cylindrical and pouch cells can operate safely and stay stable at higher temperatures than other Lithium cells. They also do not produce any gas which prevents bloating and eventual failure.

tks
Lock

 

[olaf-lampe]

What is it now? 3 years or >10years calendar life?
Hard to believe the pouches have 3 years and the cylindrical cell has 10 years...

 

[Lock]

http://news.cnet.com/8301-11128_3-20064859-54.html

May 22, 2011 9:01 PM PDT
Leyden Energy readies long-lasting laptop batteries
by Martin LaMonica

Start-up Leyden Energy on Monday is expected to announce a distribution deal for laptop battery cells that improve the life of typical lithium ion batteries.

The Fremont, Calif.-based company will supply cells for replacement batteries to Canadian distributor Dr. Battery, said CEO Aakar Patel last week. The batteries will have a three-year warranty and maintain 80 percent of their capacity after three years, he said.

The 4-year old, venture capital-backed company has not come up with a new type of lithium ion chemistry, but has commercialized an electrolyte technology which Leyden Energy licensed from DuPont, Patel said.

"With our electrolyte we can take any lithium ion chemistry and enhance the cycle life and at the same time enhance energy density. It's chemistry independent," he said.

The electrolyte is made of a lithium ion salt that remains stable at high temperatures and causes less degradation over time to active components in the battery, he said.

The company. one of many trying to improve lithium ion battery performance, plans to supply replacement and new batteries for consumer electronics, such as laptops, phones, and tablets. It is also developing a line for autos. Patel said the production costs are the same as existing batteries.

http://www.drbattery.com/leydenenergy-advanced-pro-series.aspx

Dr. Battery Advanced Pro Series

The new laptop battery packs are powered by the newest battery cell technology developed by Leyden Energy Inc, a Silicon Valley research and development company.

Leyden Energy Inc.
Leyden Energy employs seasoned staffs that are familiar with the battery industry and has a passion for innovating, developing and bringing next generation products and technologies to the market. The company utilizes the cutting edge technology to fulfil a wide variety of mobile power needs ranging from electronic devices to electric vehicles.
Significant benefits over traditional batteries:
800+ recharge cycles
2+ years of sustained performance
Reduced total cost of ownership
Enhanced thermal management battery system

Leyden Advantages
Leyden’s technology developed at Dupont is procured and wholly-owned by the company. This seed technology served as the foundation for subsequent Leyden research which perfected the patent and, in turn, led to the current chemical platform. The joint partnership brings:
2 Year Warranty – 30 days Dr. Battery money back guarantee and two years for exchange or repair.
Battery Life – One battery provides the life span of two conventional batteries – decreases cost and help the planet.
Endurance – Enhanced thermal management battery system decreases the likelihood of battery life depletion due to heat.

...but no cells or specs or packs or prices listed on the Dr.Battery site yet that I can see...

tks
Lock

 

[dogman dan]

Yeah, dissapointing that they don't send many of us some right away for secret beta testing. Lab tests are great, but these guys need an army, that is us, doing real world testing on our light EV's.

 

[Lock]

http://www.technologyreview.com/energy/37607/

Tuesday, May 24, 2011

Lithium-Ion Battery Keeps Its Cool
A new chemistry could result in batteries that don't overheat—opening up new uses, including electric cars.

By Ucilia Wang

A new kind of lithium-ion battery holds much more energy than previous versions, while still working well at high temperatures. It could prove useful for hybrid and electric cars, where high-density batteries usually come with safety risks.

Leyden Energy uses a graphite current collector and sodium imide in the battery's electrolyte. These materials enable the battery to last longer and withstand higher temperatures; Leyden has declined to discuss how it achieved higher energy densities.

The company says the battery has an energy density of 225 watt-hours per kilogram. This falls at the high-end range of laptop batteries, and roughly 50 percent higher than lithium-ion batteries used in electric vehicles. The four-year-old startup expects to see its cells used by a tablet PC maker later this year, says Leyden CEO Aakar Patel.

Lithium-ion batteries are widely used in consumer electronics, but design changes are needed to make sure they work safely in electric or hybrid cars. Carmakers are typically forced to use lower-density batteries, and to use electronics and cooling systems to ensure the battery cells don't run too hot. Tesla Motors, for example, uses batteries that are similar to those found in laptops to power its Roadster sports car. The company uses liquid cooling and thermal management electronics and software to prevent overheating and other problems.

A cathode material such as lithium-iron phosphate is sometimes used for electric vehicle batteries because it can withstand high temperatures. The trade-off is that it has a relatively low energy density—around 140 watt-hours per kilogram.

Leyden focuses on the electrolyte and current collector, because the two affect the performance of the cathode and anode and help to determine the longevity and stability of a battery, says Patel. The results are batteries that work just as well in temperatures up to 60 °C, he adds.

Leyden's battery replaces lithium hexafluorophosphate, one of the components of a lithium-ion battery, with sodium imide. Unlike lithium hexafluorophosphate, it does not react with water inside the battery cell, a reaction that significantly degrades the cycle life of a battery. Lithium hexafluorophosphate also starts to decompose at room temperature and loses its effectiveness more significantly when the temperature hits 55 °C. Sodium imide doesn't start to decompose at higher temperatures.

But sodium imide can cause trouble by corroding the aluminum current collector that is typically found in a battery cell. Graphite makes a good substitute because it is immune to this assault. "The key advance for Leyden is not the electrolyte. Their magic is, they are not using aluminum as the current collector," says Venkat Srinivasan, a scientist at the Lawrence Berkeley National Laboratory who has seen the company's technology. "This change allowed them to change the electrolyte."

Patel says the batteries could use air cooling rather than liquid cooling, which would make them cheaper and lighter. The company is also developing battery management electronics and software to prevent overcharging or undercharging, problems that can compromise battery life, he says. Leyden recently received a $2.96 million grant from California on a project to produce 10 car battery packs per month.

"Leyden's cell technology presents a very real advantage for a vehicle battery pack in terms of thermal management, life-cycle performance, and energy density," says Brian Wismann, director of product development at Brammo, a company that is developing electric motorcycles and is interested in using Leyden's technology.

Leyden's new technology will first show up in laptop battery. The company says these batteries will achieve over 1,000 charge and discharge cycles, compared with 300 cycles from a typical laptop battery, and will have a three-year warranty instead of the usual one-year warranty.

Copyright Technology Review 2011.