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Unread 01-03-2012, 06:29 PM   #11
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Default Re: Low voltage on 2 batteries

I think I may have measured the voltage on the wrong pins.

I did double check my batteries I think I have them in correctly. Starting with the negative on the drivers side coming from or through the OBC then positive to negative on around. See if these voltages make more sense.

Calling the pin at about 1 o'clock #3 then the pin at about 5 o'clock #2 and finally the pin at about 8 o'clock or so #1.

2 - 3 = 49.4 VDC
1 - 2 = 37.3 VDC
1 - 3 = 12.1 VDC

I will run the cart with the meter hooked up tomorrow and give you those numbers.
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Unread 01-03-2012, 07:39 PM   #12
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Default Re: Low voltage on 2 batteries

Quote:
Originally Posted by rds-uptherivah View Post
I think I may have measured the voltage on the wrong pins.

I did double check my batteries I think I have them in correctly. Starting with the negative on the drivers side coming from or through the OBC then positive to negative on around. See if these voltages make more sense.

Calling the pin at about 1 o'clock #3 then the pin at about 5 o'clock #2 and finally the pin at about 8 o'clock or so #1.

2 - 3 = 49.4 VDC
1 - 2 = 37.3 VDC
1 - 3 = 12.1 VDC

I will run the cart with the meter hooked up tomorrow and give you those numbers.
I'm not sure what voltage you are posting.

Charge the batteries up and let them sit for about 12 hours and then post voltage for each battery and also the whole pack. Then take it for a run with your meter attached to the whole pack and post the voltage drop (load).
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Unread 01-03-2012, 08:13 PM   #13
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Default Re: Low voltage on 2 batteries

Check each battery at the pos and neg post. Post those 6-voltages. Check the pack voltage at the pos and neg going to the controller and post that voltage.

That's what the guys are asking......
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Unread 01-03-2012, 09:38 PM   #14
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Default Re: Low voltage on 2 batteries

I have voltages of 7.85 volts on two of the batteries. The other 4 are 8.73 volts. Each battery was checked individually, then the battery pack as a whole I have 50.3 volts. This after a charge and sitting around 12 hours.

Scottyb had asked what voltage I had at the charge receptacle. The pins I got those voltages off of are what I was referring to here:

Calling the pin at about 1 o'clock #3 then the pin at about 5 o'clock #2 and finally the pin at about 8 o'clock or so #1.

2 - 3 = 49.4 VDC
1 - 2 = 37.3 VDC
1 - 3 = 12.1 VDC

I'm probably not referring to them correctly.

I still need to run it with the volt meter and post those voltages. Is it okay to just hook it to the first negative post and the last positive post and go for a run? Or should I hook in somewhere else?

Thank you for all your suggestions.
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Unread 01-04-2012, 07:26 AM   #15
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Default Re: Low voltage on 2 batteries

Quote:
Originally Posted by rds-uptherivah View Post
I have voltages of 7.85 volts on two of the batteries. The other 4 are 8.73 volts. Each battery was checked individually, then the battery pack as a whole I have 50.3 volts. This after a charge and sitting around 12 hours.

Scottyb had asked what voltage I had at the charge receptacle. The pins I got those voltages off of are what I was referring to here:

Calling the pin at about 1 o'clock #3 then the pin at about 5 o'clock #2 and finally the pin at about 8 o'clock or so #1.

2 - 3 = 49.4 VDC
1 - 2 = 37.3 VDC
1 - 3 = 12.1 VDC

I'm probably not referring to them correctly.

I still need to run it with the volt meter and post those voltages. Is it okay to just hook it to the first negative post and the last positive post and go for a run? Or should I hook in somewhere else?

Thank you for all your suggestions.

I would have to say that you have two defective batteries. They are only 35% charged and causing your pack to only charge to 80%. I would exchange them.
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Unread 01-04-2012, 08:23 AM   #16
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Default Re: Low voltage on 2 batteries

New batteries will not reach 100% capacity until cycled several times. I am still suspect of how they are wired. So do this for me...
Check and note all individual battery voltages.
Plug the charger in and verify that all individual battery voltages are rising.
It is possible that you have the charge leads on the wrong connection.
Very possible.
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Unread 01-08-2012, 04:42 AM   #17
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Default Re: Low voltage on 2 batteries

I pulled the 2 batteries out that had low voltage and took them in to be checked. They determined that each had a bad cell. So I'm back to as near normal as I can be.

Thank you all for your help. I'm sure I'll have many more questions in the future.
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