RC-Monster Forums - View Single Post - E-bike project

zeropointbug · 07.09.2009, 12:47 PM

I am thinking you need a big bulk order to lower the price, like 500 to 1000 or more?

Also, are you dead set on a specific voltage to use? If not, you could use some Prius NiMH cell modules, they are supposed to be fairly equal in performance to A123 cells (surprisingly)... you can get 2 7.2v/6.5Ah modules for $30 (at least it shows 2 in the pic, might be for one). There is a large selection of them on eBay.

These would be a very good option IMO, as NiMH are very durable and have very high cycle life, they have a nice 'packaged' appearance. It would make for easy pack making, nice and clean, and very robust, electrically wise. I was reading on the endless-sphere board and a couple guys used them in their ebikes and some say they would prefer them over LiFe pack.

	(#33)
zeropointbug Z-Pinch racer Offline Posts: 3,141 Join Date: Nov 2006 Location: SK, Canada	07.09.2009, 12:47 PM I am thinking you need a big bulk order to lower the price, like 500 to 1000 or more? Also, are you dead set on a specific voltage to use? If not, you could use some Prius NiMH cell modules, they are supposed to be fairly equal in performance to A123 cells (surprisingly)... you can get 2 7.2v/6.5Ah modules for $30 (at least it shows 2 in the pic, might be for one). There is a large selection of them on eBay. These would be a very good option IMO, as NiMH are very durable and have very high cycle life, they have a nice 'packaged' appearance. It would make for easy pack making, nice and clean, and very robust, electrically wise. I was reading on the endless-sphere board and a couple guys used them in their ebikes and some say they would prefer them over LiFe pack. “The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens