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Anko:
Hi,

I'm lost in what type of battery the 3612s is, it says
li-iron ? and I see Li-ion and all kind of names, but
what type is the LFP-3612s and how many kg will this
battery be ?

hope you can help out.

Bikemad:

--- Quote from: Anko on October 08, 2009, 09:09:32 PM ---I'm lost in what type of battery the 3612s is, it says
li-iron ? and I see Li-ion and all kind of names, but
what type is the LFP-3612s and how many kg will this
battery be ?

--- End quote ---

Anko,

The "iron" must be a typing error as it's actually a lithium manganese battery, made up of 30*3.8V 4AH 26650 size cells.

As the 40 cell LFP3616s weighs 5.5Kg, I'm guessing the 30 cell LFP-3612s will weigh around 4.5kg.

Perhaps Yao will confirm this. (Or correct me if I've got it wrong.)

Alan
 

e-lmer:

Actually the Fe in LiFePO4 is Iron.
The whole name is "Lithium Ferro Permanganate"

My guess is that he saw Lithium ION.  LiFePO4 is
a Lithium Ion battery.  Golden Motor Lithium Ion
battery packs are LiFePO4.

Other Lithium Ion batteries include Lithum Polimer,
Lithium Cobalt Oxide, or even Lithium Titanium disulfide.

I am guessing, but I think the 3612S means (36)Volt and (12)Amp Hour.

Bikemad:

--- Quote from: e-lmer on October 14, 2009, 08:47:48 AM ---Golden Motor Lithium Ion battery packs are LiFePO4.

--- End quote ---

These Golden Motor Lithium Ion battery packs are not LiFePO4:                                          



It uses these LiMn cells:  




--- Quote from: Golden Motor ---Lithium ion rechargeable battery, 26650 size, LiPF6 electrolyte, Manganese Spinel structure cathode.
High energy density lithium ion battery cell.
Cell capacity: 3.8V 4AH
Cell diameter: 26.24 ± 0.16 mm (top end), 26.16 ± 0.10 mm (bottom end)
Cell height: 65.05 + 0.10/-0.15 mm
Cell weight: 92g

Cell specifications
1a Rated charge(4A) Limiting 4.0 A, 120 min and constant 4.2V charge at 23±2°C.
1b Recommended charge Reference 1a
 
2 Rated discharge Constant 0.8 A discharge until 2.5V at 23±2°C.
 
3 Rated capacity 4.0Ah Minimum of rated discharge capacity after recommended
charge.
 
4 Nominal voltage 3.8V Mean voltage during rated discharge after rated charge.
 
5 Shipping voltage 4.03±0.01V Nominal. Approximate state of charge = 80%.
 
6 Internal resistance at shipping 23±1 m? By AC 1 kHz.
 
7 End of charge voltage 4.20 ± 0.05V
 
8 End of discharge voltage 2.5V Discharge voltage used for determination of rated
capacity.
 
9 Charging time 120min Rated charge.
 
10 Maximum continuous charging current 6.5A
Maximum continuous discharging current 10A
Maximum pulse discharging current 40A
 
11 Operating temperature
Charging 0 ~ 45°C
Discharging -20 ~ 60°C
12 Storage temperature
-20 ~ 60°C
Recommended temperature for long term storage is
23±2°C
 
13 Shelf life 6 months Typical value at 23±2°C, from ship state.
 
14 Self-discharge rate /month ?0.5%
--- End quote ---

GM state the number of Charging Cycles for these packs is >800 times, whereas the LiFePO4 packs are >1000 times.

Alan
P.S. LiFePO4 = Lithium Iron Phosphate.

GoldenMotor:
Yes they are Lithium Manganese

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