I have 48 CALB CA100's in my truck, also 5 years old. I've never even
had to top off any. I checked them in the Spring and they were all
within 2 thousandths of a volt of each other. In July I had one of those
*doh* events and drained the *entire* pack to 9 volts. I recharged the
pack and they were all within 2 thousandths of a volt of each
other...except for 1 which read 0 volts. I had a spare which I charged
externally to the same voltage as those in the pack. Two charge cycles
and I checked again this weekend. All the same still. So I'm with Tom.
CALBs are magic.
--Rick
On 8/7/2018 6:48 PM, Tom Jones via EV wrote:
I really have to beg to differ about CALBs.
My Focus has 45 CA180 cells that have been on the road for about five
years without BMS. Once a year, sometimes twice, I pump a few amp
hours into the lowest cells with with a radio control type charger.
That usually involves about five cells.
I do have a homemade battery monitor with a display, expanded voltage
scale, that I use to keep a eye on the pack while driving. And, I do
datalog each cell all the time while driving and charging. In the
charging sweet spot, about 3.4 volts, all 45 cells are in a tight
range of about 25 mV. I consider that basically magic!
My battery monitor also will stop the J1772 if any single cell voltage
gets too high.
So, that my experience with CALB cells,
Tom
On 8/6/2018 7:51 PM, Alan Arrison via EV wrote:
I guarantee that the inferior Chinese cells will change capacity as
they are cycled and not by just a few percent.
Running them without a BMS is a recipe for disaster. Damaged cells at
best, a fire at worst.
All the Chinese cells are junk, especially the CALBS.
Al
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