Maplins are selling an 80w lithium battery for £50!
Here is the spec sheet:
Battery capacity: 4700mAh
Dimensions: 19 x 210 x 290mm approx A4 size
Energy: 80Wh
High power port: 19-21V (6A)
Medium power port: 12V
USB power port: 5V
Weight: 1kg approx
Here's how it fits into my plan to upgrade my pedelec's range / acceleration:
* Put it into "high power mode"
* Plumb it into the bike with a dash switch to turn it on and off, or maybe a button for power assist when accelerating and a blocking diode so it doesn't snarf power from the main battery
* Recharge nightly
Of course the problem is, that the system voltage is 36V. Will I blow up the bike if I don't use a DC-DC converter, or switch to plan B (which is:)
* Buy three of them
* Put them into 12v mode
* Plumb them in serially
* And so on
What do you think I should do? I am also thinking of maybe gettin banks of lower power 12 volt lithiums or SLAs and using them - is this a better idea? (certianly seems cheaper). How much tolerance do you think the Sakura's system will have for this kind of "overclocking"?
Answers on a postcard
Range extender / acceleration mod for electric moped
- badnewswade
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- Joined: Mon Sep 24, 2007 9:53 am
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errrr dont think this is really going to work I'm afraid, nice idea but the spec says the "high power out put is 6A " well I suspect the moped will pull 4 times that maybe more.
Nope that batts just not going to work I'm afraid
You need to be looking at either bigger li-ions but then you'll be paying much higher prices or going down the route of say F size 7ah Nicads or sealed LA's
I see you've asked about my Yuasa's and these would be your best and easist route , PM sent BTW , not that I'm trying to flog you them but I think you wold find it being the best way.
ChrisB
Nope that batts just not going to work I'm afraid
You need to be looking at either bigger li-ions but then you'll be paying much higher prices or going down the route of say F size 7ah Nicads or sealed LA's
I see you've asked about my Yuasa's and these would be your best and easist route , PM sent BTW , not that I'm trying to flog you them but I think you wold find it being the best way.
ChrisB
I reject reality and substitute my own !!!!!!
- badnewswade
- Posts: 223
- Joined: Mon Sep 24, 2007 9:53 am
- Contact:
Ahhhh..... I see... (comprehension dawns on untrained mind)
so what you're saying is that a 200w motor will try to yank those amps out of a battery whether they're there or not, at worst causing permanent damage or maybe even (gulp) thermal runaway!
What about using a second controller or a capacitor or diodes as a buffer?
so what you're saying is that a 200w motor will try to yank those amps out of a battery whether they're there or not, at worst causing permanent damage or maybe even (gulp) thermal runaway!
What about using a second controller or a capacitor or diodes as a buffer?
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