I have to agree with Cruisin. I took a chance on Lithium with CALB cells,
and man have I got burned. My pack is just shy of 2 years old. It has been
very lightly used for only 10,000 miles and perhaps 200 cycles. The cells
are supposed to be 100Ah. Even when new I bench tested a few at .3C and only
got 95Ah. Now the pack is below 80AH according to my BMS. At this point I
have no idea what my range will be each time I drive as I have had several
cells lose 25% capacity out of nowhere. So much for the cheaper than lead
mantra.
1000+ cycles - Not a chance
100,000 miles - You're kidding right?
10 years - In your dreams.
Al
CALB cells (and many others) are typical Chinese junk.
----- Original Message -----
From: "Cruisin" <[email protected]>
To: <[email protected]>
Sent: Sunday, April 20, 2014 7:05 PM
Subject: Re: [EVDL] self-discharge of CALB 180Ah LiFePO4 cells
After selling CALB cells for over 5 years and using them in my own
conversion, I can tell you from experience the following. At least 15% of
the cells will change so much in the first year the BMS will react to your
disadvantage of early charging termination and early over discharging. A
one
year warranty that is promised is hocus. the second year will experience a
10% failure with no warning of a cell. This makes your car unusable.
Further
experience with other Chinese cells is no better, or worse. I now sell and
use the Nissan Leaf module that is half the price and so far no failures
like the CALB. I would not ever recommend a CALB cell to any customer.
Those
that are pushing the cells like EVTV have inventory they want to unload
before their is no more demand for Chinese cells. My customers who have
converted to the Volt and Leaf cells, made by the same S Korean
manufacturer, are really happier with the results. No more stagnant at
rest
loses that you have experienced. Look at what cells are used in the
popular
plugin cars that are required to provide a 8 year warranty in California,
no
Phosphate. CALB would be out of business if required to provide a 8 year
warranty. They don't even recognize their one year warranty. You wonder
why
you are having problems, wake up and smell the coffee.
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