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Re: (ET) Fully charged pack voltage



       If you have Third after using the CC / Power Pulse button, the contactors  the armature resistors and the 2AH relay are OK.There is an issue with the connections between the 2AH relay's coil and where it's shunted across the traction motor's armature.

         If there is too much perceived voltage drop, 2AH prevents the 2A contactor from picking up.Pushing the CC button bypasses the shunt long enough for the relay to pick up, allowing the contactor to close.

RJ

Stewart Wells wrote:

Hi all, Is it possible to buy coils for an I5?  The switches on my foot pedal check out OK, but I only have the first two speeds, with 3rd and 4th unresponsive—although 3rd seems to kick in if I use the cruise control option.

 

All for now, Stewart Wells

 


From: elec-trak-bounces cosmos phy tufts edu [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of John J Casey
Sent: Wednesday, April 29, 2009 11:04
To: Elec-trak
Subject: Re: (ET) Fully charged pack voltage

 

There was much back and forth about batteries lately, almost too much for me to follow.  T. Humphrey posted useful voltage numbers and the fllwg may also be useful.  My T105's have 39 charge cycles (18 hrs per cycle) using the oem charger:

45.2     full chg

42.2     1 min

41.5     5 min

40.5     30 min

40.2     1 hr

39.6     3 hr

39.2     6 hr

38.8     24 hr

38.3     48 hr

38.2     72 hr

 

On Apr 23, 2009, at 9:28 AM, John J Casey wrote:



In my experience, the onboard ge charger takes my newish T-105's up to 44-45v over an 18 hour cycle, the last 3-5 hrs between 44.4 and 45v for cell equalization.  End the charge cycle and in a short time the voltage settles back to 39v.

Jack

On Apr 23, 2009, at 8:13 AM, Michael S Briggs wrote:




I just got a nice new pack of Trojan T-605s (slightly lower capacity than T-105s, with a proportionately lower price). I'm trying to figure out what the voltage of a fully charged new pack *should* be, and I have seen very different things as skimming through the archives.
            My understanding is that the chemical reactions taking place in a lead-acid cell produce a potential difference of 2.13 Volts, so a fully charged lead-acid battery measured with a very high impedance voltmeter should measure that 2.13 Volts per cell, or 6.39V for a 6V battery, and 38.34 V for a 36V pack.
            But, I have seen statements in the archives saying that a fully charged pack should have a voltage of 42V or so (various posts saying anywhere from about 40V up to 44V).

Thanks,
Mike

--

--------------------------------------------------------------
Michael S. Briggs, PhD
UNH Physics Department
(603) 862-2828
---------------------------------------------------------------


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