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battery cells - experience, lifetime, incidents

2732 Views 8 Replies 4 Participants Last post by  brainzel
I'd like to open a thread about experience, lifetime and events about LiFePo4 cells.
Please, this shouldn't be a thread of discussions, only for real life experiences.
It would be cool, if anyone would take this layout for reporting to better comparing the data:

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cell type: LiFePo4
cell manufacturer: Sky Energy (CALB)
cell Voltage (nominal): 3,2 V
cell ampere hours: 120 Ah
First drive date: 18.07.2010
driven miles / kilometers: 2 mi / 3 km
changed cells out of pack / at mi/km : no / -
charger: Zivan NG3
BMS: none
special incident: none
free text area: hope for 200.000 miles / 300.000 km lifetimerange :)
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lifepo4's are uneventful. 2 years using ts and close to 1 year for blackhawks nothing to report. 42 amp hours out of the pack 2 times a day 44 amp hours back into the pack 2 times a day in and day out. They just work. I think they are too new to have any failures not caused by accidents. None that I can see should have died of natual causes so far.

Batteries arent the problem its the other components that getcha. My scooter is down because of a motor issue.
 

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Discussion Starter · #5 ·
A couple of similar threads were started over the past year, with few responses from regular members, who's experience is already documented in their build threads and other subject specific threads, so IMHO, this feels like redundant repeat of same info. Sorry....
Is it realy so easy to find? I thought, no. I couldn't found these informations in an easy way. There are different threads with much different questions, but I didn't found such a overview. So why don't start such a thread?
If there is a assimilable thread please let me know, I would be really glad about it :)
 

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Is it realy so easy to find? I thought, no. I couldn't found these informations in an easy way. There are different threads with much different questions, but I didn't found such a overview. So why don't start such a thread?
If there is a assimilable thread please let me know, I would be really glad about it :)
I'm sorry if I put you off with my response, I meant no offense :) . I often see such threads getting lost because once they hit 2nd page no one will see them again. This format is not the best for collecting statistics, unless admin makes it a sticky thread , so its always on the first page.

Here is my info

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cell type: LiFePo4
cell manufacturer: mix of TS and CALB
cell Voltage (nominal): 3,2 V
cell ampere hours: 160-180 Ah
First drive date: June 2009
driven miles / kilometers: 9,500 / 15,000
changed cells out of pack / at mi/km : added 4 CALB cells to compensate for weak TS cells, which were paired in parallel
charger: Zivan NG3
BMS: miniBMS
special incident: few cells got weak after exposure to over 3C, still work after being paired in parallel
free text area: after a year of daily use, no signs of degradation when used properly
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cell type: LiFePo4
cell manufacturer: Blackhawks
cell Voltage (nominal): 3,3 V
cell ampere hours: 100 Ah
First drive date: Oct 2009
driven miles / kilometers: 4000 (now a daily driver 55 miles a day) / 6400
nothing out of the ordinary
charger: $250 chinese supplied at 168Vdc 6amps from ev
BMS: miniBMS
special incident: none
free text area: After the last 10 months amps in and out/voltage is still spot on from the first drive (I used to have a spread sheet but got tired of putting in the same data every day)
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Pretty much ditto for 60ah TS cells in my scooter aside from they are 2.5 years old now.
 

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#####
cell type: LiFePo4
cell manufacturer: Thunder Sky
cell Voltage (nominal): 3.2 V
cell ampere hours: 160 Ah
First drive date: 03.05.2010
driven miles / kilometers: 1400 mi / 2253 km
changed cells out of pack : no changes, I have one spare that I have not used
charger: Manzanita PFC 20
BMS: Voltblochers which I may remove soon, I don't think I need them.
special incident: 1 bad Voltlocher replaced, drilled a small hole in one battery case which was sealed up with a nylon screw and epoxy, cell has had no problems since.
free text area: Daily driver 52 miles/day Charge at work and home
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Discussion Starter · #9 ·
it would be great if an admin could clear this thread (no discussion, only facts) and make it (or an assimilable thread) sticky, so anyone could see it and be a part of a quick life experience thread
 
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