That's a big voltage drop. Even when I charge at 70A DC my DVM on the pack
terminals agrees to within a tenth of a volt with the voltage readout on the
charger taken at it's output. I would suspect a loose connection inside the
charger or at the charger leads on the pack.
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>But thenyou say the charger reads 334 - 335V, which is way different than
the 231V
>you say the string is at, so I'm confused. What charger are you using? Does
>it read 334 - 335V at the same time you measure 231V across the charger
>leads at the pack?
Tomw,
Thanks for catching that. I misse
I have 132 60AH batteries in 2P66S. So I am going to call this 66 batteries
at 120AH. Specs call for 3.6 volts max, so 66 in serial is 237.7 volts. I
don't want to push them so I set the max voltage at 231volts charge which
brings me to approx 3.5 volts per battery. Now in real life once it is
: cor_van_de_water Tel: +1 408 383 7626
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of John Lindsay
via EV
Sent: Thursday, September 25, 2014 6:29 PM
To: Buddy Mills; Electric Vehicle Discussion List
Subject: Re: [EVDL] LiFePO4Charging
Read the voltage drop
Read the voltage drop across the cables connecting the batteries.
The missing volts equal the charge current multiplied by the total resistance
in the connections and cables. Otherwise known as Ohms Law.
You may have some bad connections.
John Lindsay
> On 26 Sep 2014, at 10:50 am, Buddy Mil
I thought I understood how to charge my 9 month old LiFeP04 but know I am
doubting my process. So I will lay it out and see what feedback the battery
gurus here can suggest.
I have 132 60AH batteries in 2P66S. So I am going to call this 66 batteries
at 120AH. Specs call for 3.6 volts max, so 6
