Originally Posted by chamilun
well, Ill ask the big question first: what kind of money are you talking about? 15K?
The price for my battery will be close to $16000 including BMS and charger. They don't seem to have a problem with an order that small, so your order could be any number you want on top of that. It doesn't have to be 45 cells like mine.
Originally Posted by RKM
I'm very interested! I think I would be wanting 45 cells 3.2V with 160Ah (if available) for a pack with 23 KWh.
Could you remind us of the discharge C ratings (continuous and max burst) as well as weight per Wh?
Do they provide a suitable charger and BMS for an EV application? Quality and cost?
I'll be very interested to know a cost estimate per Wh. The timing works well for me as I won't need batteries before spring.
Your higher amperage testing of these batteries will let us know how suitable they will be (though the risk remains for long term reliability!
). Thanks again for taking the lead on these batteries.
I can ask if they offer a 160AH cell (they should), my tests are for 200AH cells though. But The quality SHOULD be the same across the product range.
Constant C is 1C, and max C is 5C (for 15 seconds or less). For your battery, you would have 23.04 kw of power for cruising and 115.1 kw for acceleration (assuming 100% efficiency).
WH/Kg calculates to 88.9 for my 200AH cells (before calculating for charger and BMS). Most of the LiFePo4 like this seem to be between 85 and 100wh/Kg. The older LiPo 3.7V soft cells can be up to 160 wh/kg from what I was able to find. Its been said that the older LiPo technology was good for up to 300 wh/kg in some more general info sources, but I never found a supplier that had anything like that in their product listings. Electrovaya (canadian) claims to have 400wh/kg, but they never returned my Emails.
They do provide a charger matched to the battery if requested. I can only comment on the charger they sent with my 12.8V sample battery which did seem to be of good quality, I had no problems with it. The price for the charger for the 144V battery came to $1503.60. The price for the 12.8V was $128.80.
The cost per WH for just the battery is ~$0.466/wh. BMS and charger are added on top of that. The price quote for my battery works out to $0.55/wh with everything included. Based on this you could now get an idea for what your battery would cost. I do not yet have a price for the freight though.
Yes, there is a risk for the long term, all I can say is that the older LiPo chemistry was good for up to 10 years and LiFePo4 is more stable so maybe it would last longer. But theres no way to be sure so take that into account if you decide to buy.
Higher C tests are comming next......
All prices are in US$
If we could get the price of oil to come back up, that would give the canadian dollar some more strength. Maybe we should all yell "supply shortage!!!!" really really loud at the same time. Thats usually all it took in the past to inflate the price, LOL