BMS+ w/4 prius packs Vs. Enginer 4KWH?

[Atari]

BMS+ w/4 prius packs Vs. Enginer 4KWH.... which "pack" would have longer (in theory) range? How many KWH is an original prius pack?

BMS+ battery pack link:
Assemblies

Enginer PHEV kit on ebay: (if link is dead, search for PHEV on ebay.. usually comes up)
Prius Plugin PHEV Conversion Kit with Lithium-Ion - eBay (item 200344551230 end time Jul-19-09 23:25:01 PDT)

[Atari]

Originally Posted by Atari

BMS+ w/4 prius packs Vs. Enginer 4KWH.... which "pack" would have longer (in theory) range? How many KWH is an original prius pack?

BMS+ battery pack link:
Assemblies

Enginer PHEV kit on ebay: (if link is dead, search for PHEV on ebay.. usually comes up)
Prius Plugin PHEV Conversion Kit with Lithium-Ion - eBay (item 200344551230 end time Jul-19-09 23:25:01 PDT)

Digging around more... I've seen 1.3KWH to 1.5KWH listed for prius packs.. that would mean adding 3 new prius packs (3.9KWH?) would be about the same as adding the Enginer 4KWH pack? -- except LifePO4 would charge faster, so this would be the better way to go?

At $3000, it's about twice the cost of getting 3 used prius packs from auto dismantlers in the area at $500/each. (plus cost & time to reassemble them to fit in the cargo area).

Does anyone know if it would be possible to use the Enginer PHEV pack (the rack, thundersky batteries, charger, etc.) with BMS+ solution rather than the NiMH prius packs?

[Flying White Dutchman]

the Nimh oem battery packs only hold up to 1kwh at most that you use with the BMS+
so with 2 addpacks your have 3 kwh.

[vertex]

According to Ron's spread sheet from Calcars, the Prius NiMh pack at 75% DOD has 1.3 KWH capacity. The standard DOD is lower, hence your lower number. As usall, it is a trade off between capacity and battery life. I think all the conversions lean toward capacity.

[Flying White Dutchman]

i was talking about around -70% soc not 75%

but i tested 2 packs and did not get past ~1kwh depleting from ~235 down to 195 volts DC.

this was a 2005 and a almost new 2008 pack.

the prius batter pack is rated 201,6 volts and 6.5ah .. that counts to 1310,4 watth
and that is the total battery not just 75%

[vertex]

Interesting. Since you actually tested it, I would trust that # more then what's on the spread sheet. Thanks for the clarification.

[krousdb]

Originally Posted by Atari

BMS+ w/4 prius packs Vs. Enginer 4KWH.... which "pack" would have longer (in theory) range? How many KWH is an original prius pack?

BMS+ battery pack link:
Assemblies

Enginer PHEV kit on ebay: (if link is dead, search for PHEV on ebay.. usually comes up)
Prius Plugin PHEV Conversion Kit with Lithium-Ion - eBay (item 200344551230 end time Jul-19-09 23:25:01 PDT)

Anither thing to consider is weight. Each Prius pack is 150lb, so 4 would be 600 lb. The 4kw Enginer kit weighs 180 lb.

[Flying White Dutchman]

one pack is 45kilograms and thats 99lbs and with a custom housing you can get it down to 40 kilo and so 88lbs... so 2 packs = 176lbs thats 3.9kwh

[krousdb]

Originally Posted by Flying White Dutchman

one pack is 45kilograms and thats 99lbs and with a custom housing you can get it down to 40 kilo and so 88lbs... so 2 packs = 176lbs thats 3.9kwh

Thanks for the weight correction but how do you get 3.9 kwh out of 2 packs?

[mrbigh]

Originally Posted by krousdb

Thanks for the weight correction but how do you get 3.9 kwh out of 2 packs?

He is talking about the total KWH of the 2 add on packs + the OEM.
My NiMH assemblies weight about 82 Lb each with the steel railing supports. (x3).