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Old 10-10-2019, 12:08 PM   #21 (permalink)
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Ah, good point, I did not see that.

A 12v battery of 8 cells would be able to be regenned up to 160amps - if one could rig up an alternator or DC-DC converter capable of 160A@15V, that would be 2.4kW (3.2hp) of regenerative braking. That's about 30% of the regenerative capability of a stock Insight.

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Old 10-10-2019, 12:23 PM   #22 (permalink)
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I need a 4 cell LiFePO4 bms.
When I built my batteries there were none available.
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Old 10-10-2019, 12:35 PM   #23 (permalink)
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Quote:
Originally Posted by oil pan 4 View Post
I need a 4 cell LiFePO4 bms.
When I built my batteries there were none available.
There are quite a few options available now from $15-$140 depending on current needs. A 45a charge, 80a discharge, 220a peak discharge 4S LiFePO4 BMS is around $45.
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Old 10-11-2019, 03:45 AM   #24 (permalink)
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I will keep these guys in mind if I ever get around to building an e-bike battery... 32 cells would make a really nice 52V/16Ah pack that can provide 400A of current. 20kW burnouts on a road bike, anyone?
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Old 10-11-2019, 11:28 AM   #25 (permalink)
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I am wondering if we could use one of those 27 cell packs as a 14.4V jumper battery pack. It comes in a nice case with a handle. So you could charge it indoors for people who don't have access to outdoor charging. You would just carry it to your car and plug it in the cigarette lighter and it would maintain the voltage so the alternator wouldn't kick in... They are only $15.

I think I'll start a thread on that.
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Old 10-11-2019, 11:31 AM   #26 (permalink)
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Ha, my LiFePO4 60ah starting battery hits 450 amps cranking my diesel while heating the glow plugs.
Maybe I could figure out a way to bypass it for starting.
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Old 10-14-2019, 11:40 PM   #27 (permalink)
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For those looking for something a bit bigger, they're selling Coda 2.5 kWh 22.4V battery packs...

2.5KWH CODA 24V LIFEPO4 BATTERY MODULE 22.4V 112AH 7S 4C




Well, at least they were until they sold out. But, they said...

Quote:
We will have 24v 8s 5.9kWh modules for sale by Friday that will be priced around the same as these. They will also be 8s lifepo4 which will be a perfect 24v powerwall.
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Old 10-15-2019, 12:07 AM   #28 (permalink)
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Enginer Packs

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What did you do with the cells from you Enginer Battery Packs?
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Old 10-25-2019, 04:21 PM   #29 (permalink)
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Battery Hookup has their 8Ah pouch cells on sale for $4.50. They are normally $6 each. Crazy good deal. I am thinking about picking some up and I don't even have a project ready for them haha.

Quote:
Originally Posted by TexasCotton View Post
Daox
What did you do with the cells from you Enginer Battery Packs?
I ended up selling the whole kit to another EcoModder.
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Old 11-08-2019, 03:47 PM   #30 (permalink)
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Here is another bigger batter option. It is 24V and ~4.5 kwh. The price seems high at $450, but that is $100/kwh. Lead acid is $80/kwh.

BYD battery


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