[Vo]:batteries
Hi, If the thickness of the electrolyte in a battery is reduced to the bare minimum that still allows it to function, then you reduce size, weight, cost and internal resistance thus improving efficiency. Regards, Robin van Spaandonk Drive your electric car every second day and recharge it from solar panels on your roof on the alternate days. The other days, drive your spouses car, and do the same with it. "Charge when the Sun shines".
Fwd: [Vo]:Batteries Never will ?????!!!
Not to mention that there are 6 possible ways to connect the hull effect transducers to the new drive and 3 possible ways the that 3 phase motor can be connected in the fwd direction. I had to go through all 18 of these many times. I leaned that if the drive runs good but in reverse, do not reverse the phasing to the motor, advance the fwd phasing one step ahead. Go from 1-2-3 to 2-3-1. Why, I do not know. I mounted the battery on a rack over the rear wheel. There was too much weight over the rear wheel and none over the front. The bike was unstable at higher speeds and tended to do wheelies on start up. I moved the battery fwd to balance the bike. I had to get a mounting bracket made at a local weld shop. It was a simple device made with C clamps and only cost $20. More $$$ and more time again. The bike now rides much smoother. It feels more like a motor cycle. -Original Message- From: fznidarsic To: vortex-l Sent: Thu, Oct 10, 2013 10:34 am Subject: Re: [Vo]:Batteries Never will ?!!! I purchased an electric drive kit for my bicycle. I paid about $400 for the lithium ion battery and about $800 for the whole kit. It will do 20 miles on the level with some peddling. I can peddle on the level but I wanted the drive to go fast at points where I have to merge with local traffic and to climb hills. This use depletes the battery in about 10 miles or less. My friend has a cheep ($200) gas powered conversion. It has a longer 70 mile range and can maintain high speed throughout the entire range. The 2 cycle 49 cc gas engines does not provide power at low speeds. It just stalls when engaged below 5 mph. My electric provides power from creep speed to pull out speed. I wanted to learn about the technology and I did through the school of hard knocks. The shaft twisted in the bike frame, pulled the wires out the drive. The resulting short circuit blew out the hull effect position sensors, the electronic drive, and the the throttle. I replaced them. $$$ down the drain. The internal electronic drive that came with the motor smoked 3 times and cost money to replace each time. I installed an external 2KW controller and welded a open end box wrench to the motor's shaft. The other end of the box wrench was C clamped onto to the bike frame. I also put on torque arms to to keep the shaft from slipping again. Torque arms with not hold the shaft down on there own. The shaft tends to wiggle on loosen up the wheel lugs. The torque arm then strip out. The wrench stopped this and the bolts now remain tight. Blue lock tight also helps. The power of the 2 KW drive was nice but the battery depleted faster. The 2KW external drive had trouble starting without the hull sensors. It went into reverse upon start up many times and finally broke 5 spokes. I replaced the spokes and cut a hole in the drive casing and replaced the hull effect transducers. I used ones with a mos output. They did not work. I had to use a hull effect transducerxs with latch and a by-polar output. These things are cheep and neat. Installing them in the drive was a 5 hr pain. When the shaft twisted in the frame it overloaded the $400 battery it made a bang. The battery is equipped with low voltage protection to prevent a cell from becoming polarized with a reverse charge. The short blew out the protection transistor. I took apart the battery bypassed the now ruined output transistor. This saved the battery and I now watch it manually. I did not like the protection circuit cutting out the battery when I was pulling out in local traffic. It reminded me of my old carburetor car that would stall out in traffic when I was trying to pull out in a tight situation. At least I could still peddle the bike. I also had to replace the battery key switch, it also smoked. I used a cheep battery isolation switch. What will go wrong today. I really want to ride and not to fix. I have a sore heal planters facites. I want the bike to get some exercise with. It let me down. I hear that electric cars brick. A term to use when they let you down in the middle of an intersection. If there is any good news in the this I have learned about lithium ion drives and permanent magnet motors. Frank Znidarsic -Original Message- From: Chris Zell To: vortex-l Sent: Thu, Oct 10, 2013 9:35 am Subject: [Vo]:Batteries Never will ?!!! http://www.controldesign.com/articles/2013/what-killed-the-electric-car/ Wow! Hoist the white flag folks. The Laws Of Physics say really good batteries will never happen. Really?
Re: [Vo]:Batteries Never will ?????!!!
I purchased an electric drive kit for my bicycle. I paid about $400 for the lithium ion battery and about $800 for the whole kit. It will do 20 miles on the level with some peddling. I can peddle on the level but I wanted the drive to go fast at points where I have to merge with local traffic and to climb hills. This use depletes the battery in about 10 miles or less. My friend has a cheep ($200) gas powered conversion. It has a longer 70 mile range and can maintain high speed throughout the entire range. The 2 cycle 49 cc gas engines does not provide power at low speeds. It just stalls when engaged below 5 mph. My electric provides power from creep speed to pull out speed. I wanted to learn about the technology and I did through the school of hard knocks. The shaft twisted in the bike frame, pulled the wires out the drive. The resulting short circuit blew out the hull effect position sensors, the electronic drive, and the the throttle. I replaced them. $$$ down the drain. The internal electronic drive that came with the motor smoked 3 times and cost money to replace each time. I installed an external 2KW controller and welded a open end box wrench to the motor's shaft. The other end of the box wrench was C clamped onto to the bike frame. I also put on torque arms to to keep the shaft from slipping again. Torque arms with not hold the shaft down on there own. The shaft tends to wiggle on loosen up the wheel lugs. The torque arm then strip out. The wrench stopped this and the bolts now remain tight. Blue lock tight also helps. The power of the 2 KW drive was nice but the battery depleted faster. The 2KW external drive had trouble starting without the hull sensors. It went into reverse upon start up many times and finally broke 5 spokes. I replaced the spokes and cut a hole in the drive casing and replaced the hull effect transducers. I used ones with a mos output. They did not work. I had to use a hull effect transducerxs with latch and a by-polar output. These things are cheep and neat. Installing them in the drive was a 5 hr pain. When the shaft twisted in the frame it overloaded the $400 battery it made a bang. The battery is equipped with low voltage protection to prevent a cell from becoming polarized with a reverse charge. The short blew out the protection transistor. I took apart the battery bypassed the now ruined output transistor. This saved the battery and I now watch it manually. I did not like the protection circuit cutting out the battery when I was pulling out in local traffic. It reminded me of my old carburetor car that would stall out in traffic when I was trying to pull out in a tight situation. At least I could still peddle the bike. I also had to replace the battery key switch, it also smoked. I used a cheep battery isolation switch. What will go wrong today. I really want to ride and not to fix. I have a sore heal planters facites. I want the bike to get some exercise with. It let me down. I hear that electric cars brick. A term to use when they let you down in the middle of an intersection. If there is any good news in the this I have learned about lithium ion drives and permanent magnet motors. Frank Znidarsic -Original Message- From: Chris Zell To: vortex-l Sent: Thu, Oct 10, 2013 9:35 am Subject: [Vo]:Batteries Never will ?!!! http://www.controldesign.com/articles/2013/what-killed-the-electric-car/ Wow! Hoist the white flag folks. The Laws Of Physics say really good batteries will never happen. Really?
Re: [Vo]:Batteries Never will ?????!!!
I do not know enough about batteries to comment, but the author is wrong about wind and solar: They are not approaching the limits of their contribution. That would be ~20% with today's distribution network. They do not require "near 100% backup for renewables in the form of mostly conventional generating sources." This is wrong for several reasons. First, I think it is more like 30% which is about the same amount of backup as conventional sources need. Coal and gas plants also need backup because they go off by accident or for scheduled maintenance. Nowadays in places like Texas, maintenance is scheduled on days when the weather forecast indicates there will be a lot of wind. In other words, it works both ways: renewables are the backup for coal. Second, in a wind farm, they seldom lose more than one turbine at a time to accident, and they never take more than one at a time off line for maintenance, so they never lose more than a megawatt or two. Third, in many places, solar generation peaks right when demand is highest, because air conditioning is one of the biggest demands. Even in Germany, where temperatures are moderate, peak demand is usually in the afternoon when solar output is highest. No source is more difficult to back up than nuclear power because the plants are huge and they tend to SCRAM and go off line completely at random times. I have not seen that factor accounted for in the cost of nuclear power. If this author says the cost of backup should be added to wind power, we should also add it to cost of nuclear power. At present nearly every Japanese nuke is down, and they are having a heck of a time backing them up with conventional sources. It is costing a fortune, and adding lots of CO2 to the world total. - Jed
[Vo]:Batteries Never will ?????!!!
http://www.controldesign.com/articles/2013/what-killed-the-electric-car/ Wow! Hoist the white flag folks. The Laws Of Physics say really good batteries will never happen. Really?
Re: [Vo]:Batteries for energy storage on the grid
Hi, On 31-8-2011 16:51, jwin...@cyllene.uwa.edu.au wrote: The only problem is knowing just when and where lightning is going to strike. However in the case I recall the lightning struck a town hall clock, such that the clock stopped the instant it was struck. Then the inventor of the flux capacitor just had to go back in time to the appropriate date, rig up a lightning conductor from the top of the clock to his flux capacitor, and wait for the time to tick around! Hmmm, wasn't that also a scene from the movie "back to the future"? Ref. http://www.imdb.com/title/tt0088763/ Kind regards, MoB
Re: [Vo]:Batteries for energy storage on the grid
On 8/31/2011 10:08 PM, Jed Rothwell wrote: I don't think it takes long to charge up a flux capacitor I think they only take milliseconds to charge up. In fact if I remember rightly an ideal source of power was found to be a large lightning strike! The only problem is knowing just when and where lightning is going to strike. However in the case I recall the lightning struck a town hall clock, such that the clock stopped the instant it was struck. Then the inventor of the flux capacitor just had to go back in time to the appropriate date, rig up a lightning conductor from the top of the clock to his flux capacitor, and wait for the time to tick around!
Re: [Vo]:Batteries for energy storage on the grid
On 8/31/2011 9:46 AM, Robert Leguillon wrote: That 1.21 Gigawatt drop in production could correspond to some kind of a "flux capacitor" being attached to the grid. Wouldn't that be an increase in demand? Not a drop in production. I don't think it takes long to charge up a flux capacitor. It is like charging up the capacitors of an inertial confinement fusion reactor. I have heard they produce a momentary burst of power larger than the entire electric generating capacity of the US, but it does not last long. - Jed
Re: [Vo]:Batteries for energy storage on the grid
That 1.21 Gigawatt drop in production could correspond to some kind of a "flux capacitor" being attached to the grid. Jed Rothwell wrote: >See: > >http://www.renewableenergyworld.com/rea/news/article/2011/08/batteries-for-energy-storage-new-developments-promise-grid-flexibility-and-stability > >QUOTE: > >"The Electric Reliability Council of Texas Inc. (ERCOT) faced the renewable >power industry's most critical issue in February 2008. With a huge wind >portfolio in the state the wind died down, and ERCOT declared emergency >conditions after a 1200-MW drop in production. The three-hour shortfall, >accompanied by increasing overall electricity loads, very nearly caused >rolling blackouts. . . ." > >- Jed
[Vo]:Batteries for energy storage on the grid
See: http://www.renewableenergyworld.com/rea/news/article/2011/08/batteries-for-energy-storage-new-developments-promise-grid-flexibility-and-stability QUOTE: "The Electric Reliability Council of Texas Inc. (ERCOT) faced the renewable power industry's most critical issue in February 2008. With a huge wind portfolio in the state the wind died down, and ERCOT declared emergency conditions after a 1200-MW drop in production. The three-hour shortfall, accompanied by increasing overall electricity loads, very nearly caused rolling blackouts. . . ." - Jed
[Vo]:Batteries Charge Quickly and Retain Capacity, Thanks to New Structure
another interesting developmenta self assembled skeletal catalyst http://www.sciencedaily.com/releases/2011/03/110320164225.htm [snip] They key to the group's novel 3-D structure is self-assembly. They begin by coating a surface with tiny spheres, packing them tightly together to form a lattice. Trying to create such a uniform lattice by other means is time-consuming and impractical, but the inexpensive spheres settle into place automatically. Then the researchers fill the space between and around the spheres with metal. The spheres are melted or dissolved, leaving a porous 3-D metal scaffolding, like a sponge. Next, a process called electropolishing uniformly etches away the surface of the scaffold to enlarge the pores and make an open framework. Finally, the researchers coat the frame with a thin film of the active material. The result is a bicontinuous electrode structure with small interconnects, so the lithium ions can move rapidly; a thin-film active material, so the diffusion kinetics are rapid; and a metal framework with good electrical conductivity. The group demonstrated both NiMH and Li-ion batteries, but the structure is general, so any battery material that can be deposited on the metal frame could be used. "We like that it's very universal, so if someone comes up with a better battery chemistry, this concept applies," said Braun, who is also affiliated with the Materials Research Laboratory and the Beckman Institute for Advanced Science and Technology at Illinois. "This is not linked to one very specific kind of battery, but rather it's a new paradigm in thinking about a battery in three dimensions for enhancing properties." [/snip]
