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Re: All "Future" battery technology thread

Fri Mar 23, 2018 10:24 am

RegGuheert on Jun 21, 2014 wrote:
z0ner wrote:"The Dual Carbon Battery...
Here's a more recent article on this battery: Japanese Organic Cotton Battery to Revolutionize Electric Vehicles

This article contains a few interesting quotes:
Industry Leaders Magazine wrote:The Ryden battery has five advantages over lithium-ions as mentioned above. It can charge 20times faster than lithium-ion batteries. It has over 3,000 charge and discharge cycles, making it extremely dependable. It’s easy to manufacture and doesn’t use any rare metals in the making. The Ryden battery is extremely safe and runs at a steady temperature, reducing the risk of fire and explosion hazards. Finally, the battery is 100% recyclable.
They really do portray this as the Holy Grail of batteries.
Industry Leaders Magazine wrote:Not long from now, the Japanese Le Mans auto racing group, Team Taisan, reported its association with PowerJapan Plus to create Ryden batteries for an electric vehicle it hope to race with one day. The first step towards making it possible, they say, is a Ryden-fueled electric go-kart that is presently slated to begin test driving in August. In the PJP-Taisan announcement video, Taisan Team owner Yatsune Chiba says it had long ago attempted to race Tesla electric cars however experienced issues with its batteries overheating.

“We have faced a number of issues with electric vehicle batteries up until now,” says Chiba in the accompanying press announcement. “The Ryden battery from Power Japan Plus is the solution we have been searching for. We will first develop a battery capable of withstanding the rigorous demands of racing, before advancing the technology for use in commercial applications.”
I find it interesting that they use the Tesla battery as the reference that they are working against in the racing arena.

This technology will be interesting to watch to see if it can live up to its promises.
I have looked back at this company a few times over the past few years and there was nothing but hype on their website. Now they actually have data on their website. Here is the data found there (it's all one picture):


This looks like a great potential solution for stationary storage applications.
2011 Leaf SL Demo vehicle
10K miles: Apr 14, 2013, 20K miles (55.7Ah): Aug 7, 2014, 30K miles (52.0Ah): Dec 30, 2015, 40K miles (49.8Ah): Feb 8, 2017, 50K miles (47.2Ah): Dec 7, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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Re: All "Future" battery technology thread

Mon Mar 26, 2018 6:29 pm

Via GCC:
GM researchers posit simple model to assist in balancing high energy density vs fast charging in EV design

    . . . We are at a crossroads in terms of balancing two promising technologies: (1) higher energy density (Wh/L) and specific energy (Wh/kg) batteries, relative to today’s conventional graphite/metal-oxide lithium ion systems, and (2) fast-charge capability, defined here as greater than Level 2 charging, or greater than about 20 kW. Currently in the United States, conventional Level 2 charging of 6.6 kW is available in homes and various community locations. In the ideal case, high energy batteries would be able to accommodate fast charge, but two of the most promising high-energy cell technologies, i.e., cells employing Si-enhanced or Li-metal negative electrodes, are problematic insofar as they cannot at present accept fast charging without significant degradation in cell life.

    … The tradeoff between high-energy, as provided by cells with Li-Si and Li metal negative electrodes, and fast-charge capability, which can be obtained from conventional lithium ion cells employing lithiated graphite or titanate negative electrodes, for examples, poses a dilemma in the design of electric vehicles (EVs).

    —Verbrugge and Wampler. . . .
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

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