DrainBrain will read over 4000W :)
- Thread starter Lowell
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safe
1 GW
- Joined
- Dec 22, 2006
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Ypedal said:Personal Preference.
Just as there are "truck people" and "minivan people" etc we will see the same product selections most likely in the future in electric vehicles. We really ought to focus on "inter species" discussions and not so much the "cross species" issues. Within a certain "species" of electric vehicle there are design goals for that "species". Outside the "species" some arguments don't make much sense...
safe said:Ypedal said:Personal Preference.
Just as there are "truck people" and "minivan people" etc we will see the same product selections most likely in the future in electric vehicles. We really ought to focus on "inter species" discussions and not so much the "cross species" issues. Within a certain "species" of electric vehicle there are design goals for that "species". Outside the "species" some arguments don't make much sense...
Huh? I thought we were talking about e-bike technical. Care to elaborate?
safe said:
That's a good point!
I recall there being great debates over how important it was to be more memory efficient by writing in machine code rather than 'waste' memory with a high level language. We all know how that question got answered.
I think you better work quick to get your product to market. The window of opportunity for geared ebikes will be closing with not only the price of batteries dropping. As the energy density continues to improve, (if it will be allowed to happen is another matter) then the need for efficiency becomes less of a priority.
Taken to an extreme for the purpose of illustration. If you had a power supply the size of a thimble with about a million times the energy density of the best batteries today, (this implies a nuclear source, like maybe cold fusion) how important is it then to have gears to squeeze out extra efficiency. It's rendered irrelevant.
Nimh has double the specific energy of lead. Lithium is double that of nimh. There's a kind of moore's law at work here. If there's one more doubling (which A123 has already achieved for the military), then that would be the tipping point. The benefits of gearing within the narrow confines of the ebike regulation would begin to fade.
As you point out, a lot can happen (& is gonna happen) that may prevent it.
xyster
10 MW
I agree. And it's not like this planet isn't bathed in a bajillion unharnessed watts of energy everyday. We are not even remotely close to not having enough energy to meet our needs. The problem is harnessing and expending the energy in environmentally responsible ways. If and when this situation is rectified, concern over wasted energy and inefficient use of energy will be gone like the 64kb ram chip.
I remember how expensive it was for a 512k RAM upgrade for an Amiga . Hard to afford on a shoestring student budget.
Remember how pitiful the first AA nicad cells were? My first cell phone was the Motorola brick phone, and you had to carry an extra battery in your bag because one battery wouldn't last the entire day... granted that was a long time ago, but it's pretty clear batteries will keep improving, and the prices will keep going down.
Even the current commercially available lithium cells would be quite acceptable with a lower price tag.
Remember how pitiful the first AA nicad cells were? My first cell phone was the Motorola brick phone, and you had to carry an extra battery in your bag because one battery wouldn't last the entire day... granted that was a long time ago, but it's pretty clear batteries will keep improving, and the prices will keep going down.
Even the current commercially available lithium cells would be quite acceptable with a lower price tag.
Ypedal
100 TW
I'm currently looking around and either going LifePo4 or ThunderPower Lipo with ballancing ports.....