Re: [EVDL] suspicious of a bad calb cell?

2018-02-07 Thread Lee Hart via EV
Bill Dube via EV wrote: Probably the best plating to use would be Alodine (AKA Bonderite). Not terribly difficult to do. A bit pricey, but you would only have to coat a tiny area. Alodine is the conductive, gold/brown plating used on aluminum aircraft parts. Great for corrosion prevention.

Re: [EVDL] suspicious of a bad calb cell?

2018-02-07 Thread Bill Dube via EV
Probably the best plating to use would be Alodine (AKA Bonderite). Not terribly difficult to do. A bit pricey, but you would only have to coat a tiny area. Alodine is the conductive, gold/brown plating used on aluminum aircraft parts. Great for corrosion prevention. Conducts very well (unlike

Re: [EVDL] suspicious of a bad calb cell?

2018-02-07 Thread Lee Hart via EV
Bill Dube via EV wrote: Did you lightly sand (or Scotchbite) each terminal and apply a thin coating of NoAlOx before connecting? No? Then you have to redo all the connections. They will give you no end of grief. (Ask me how I know. :-) ) If you don't do this connection treatment, the dissimilar

Re: [EVDL] suspicious of a bad calb cell?

2018-02-06 Thread Alan Arrison via EV
You are aware that 3.00V resting is considered dead right? Also, the 3C current rating is very optimistic. Drawing 216A for more than a few seconds is not good for life. Even drawing 1C (72A) on a continuous basis will lead to a short life. Since you are running a low voltage pack, I'm

Re: [EVDL] suspicious of a bad calb cell?

2018-02-06 Thread rash via EV
Thanks for the suggestions - I've definitely got some things to try - I'm running a cycle on the suspect cell on the PowerLab8 tonight; will do a "good" cell after that. I also need to redo the connections, as Bill suggested. I'll report back in a while after I know more; thanks again! -- Sent

Re: [EVDL] suspicious of a bad calb cell?

2018-02-05 Thread Bill Dube via EV
the cell is in a different spot according the BMS. Success! Cor. -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of rash via EV Sent: Monday, February 05, 2018 7:21 PM To: ev@lists.evdl.org Cc: rash Subject: [EVDL] suspicious of a bad calb cell? Hello, I recently

Re: [EVDL] suspicious of a bad calb cell?

2018-02-05 Thread EVDL Administrator via EV
I would individually test the suspect cell's actual amp-hour capacity, and compare it with factory specs, AND also compare it witth with the actual capacity of one or more other cells in your battery. If it's substantially lower than either, I'd say a warranty claim is justified. Good luck!

Re: [EVDL] suspicious of a bad calb cell?

2018-02-05 Thread Cor van de Water via EV
, 2018 7:21 PM To: ev@lists.evdl.org Cc: rash Subject: [EVDL] suspicious of a bad calb cell? Hello, I recently upgraded my lead-acid EV conversion to lithium, specifically 46 CALB 72Ah cells. I've been conservative in my bms settings, not allowing any cell to go above 3.55V or below 2.6V (hopefully

[EVDL] suspicious of a bad calb cell?

2018-02-05 Thread rash via EV
Hello, I recently upgraded my lead-acid EV conversion to lithium, specifically 46 CALB 72Ah cells. I've been conservative in my bms settings, not allowing any cell to go above 3.55V or below 2.6V (hopefully "conservative" limits with calb-published limits of 3.65 and 2.5 respectively). I took care