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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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11-10-2016, 09:54 AM | #11 |
Not Yet Wild
Join Date: May 2008
Posts: 59
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Re: charger not cutting off
I am open to any suggestions. I was going to run new wires from the charger input to the batteries. anybody know what gauge they are. look like 8 or 10.
I am wondering if I could still have a problem with charger even though it worked on my fatherinlaws cart. |
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11-10-2016, 10:08 AM | #12 |
Not Yet Wild
Join Date: May 2008
Posts: 59
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Re: charger not cutting off
another question. what does the red wire actually do at the cart charger input.
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11-10-2016, 10:19 AM | #13 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: charger not cutting off
I did miss the post about it being at 47V.
The question now becomes, where was the 47V measured at? The charger uses the voltage felt between the Red and Black wires attached to the control board to determine when to shut off. (See attached schematic with battery sensing circuit highlighted) The Red wire (+) connects to the heat sink inside the charger. The Black wire (-) connects to the outside of the negative radsok in the charge receptacle via the auxiliary contact in the charger plug. The fact the charger works on a different cart indicates the problem in in your cart rather than in the charger, but does it still work on a different cart, or did it just used to work? |
11-10-2016, 10:23 AM | #14 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: charger not cutting off
If you are referring to the small red wire that comes out of the backside of the charge port, it disables the cart when the charger is plugged into the port, but doesn't have anything to do with the actual battery charging process.
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11-10-2016, 10:24 AM | #15 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: charger not cutting off
Typically 8Ga.
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11-10-2016, 10:25 AM | #16 |
Not Yet Wild
Join Date: May 2008
Posts: 59
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Re: charger not cutting off
measured the 47 right at the batteries with the charger plugged in. dropped to 43.5 when I pulled the charger cord out. worked on my fatherinlaws cart. it shut off on his
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11-10-2016, 10:27 AM | #17 |
Not Yet Wild
Join Date: May 2008
Posts: 59
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Re: charger not cutting off
okay. well I guess I'll try new wires first from cart charger port to batteries.
don't think I should have a 1 volt drop on such a short run and large gauge wire. |
11-10-2016, 10:28 AM | #18 |
Not Yet Wild
Join Date: May 2008
Posts: 59
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Re: charger not cutting off
wonder why I didn't have a 1 volt drop before I charged. had 38.3 at batteries and 38.2 at cart input.
thanks for the input |
11-10-2016, 10:56 AM | #19 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: charger not cutting off
Quote:
1A passing through 1Ω yields 1V. When the cart is sitting, the current flow through the white 8Ga cable (+) is only a few milliamps so the voltage drop is relatively low. While the batteries are being charged, there is several amps flowing though the same wire, so the voltage drop is proportionally higher. The white wire may be connected to a 60A fuse, so in addition to the intrinsic resistance of the wire's copper conductor, there are 3 sets of connections and there are two sets of connections on the black wire that might have excessive resistance. |
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11-10-2016, 10:59 AM | #20 |
Not Yet Wild
Join Date: May 2008
Posts: 59
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Re: charger not cutting off
I took both of those readings with the charger unplugged
38.3,38.2 before charging 43.5,42.5 after charging the 47 was while charging so you think that 1 volt drop is normal |
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