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Old 10-08-2020, 06:15 PM   #31
WalterM6
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Default Re: Need a new lithium pack

I received my Lifepo4 batteries today that I mentioned earlier in this thread. Everything looks as advertised. Took 6 weeks for delivery. Unpacked and started bottom balancing.
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Old 10-08-2020, 06:19 PM   #32
DaveTM
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Default Re: Need a new lithium pack

Connect all of your center post together .
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Old 10-08-2020, 07:10 PM   #33
WalterM6
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Default Re: Need a new lithium pack

No center posts on these. What I don't like about these batteries is that the pos+ post is black. Going to have to be careful connecting it together.
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Old 10-24-2020, 09:19 AM   #34
flyons78
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Default Re: Need a new lithium pack

@WalterM6

How is your build coming along? I just got my BMS, still waiting on the battery pack. I'd love to see pictures of your setup and review on performance.
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Old 10-25-2020, 06:07 PM   #35
WalterM6
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Default Re: Need a new lithium pack

flyons78 I just spent all weekend installing and troubleshooting my pack. One of my batteries was bad. When the voltage got to 3.2 v battery 15 just shot up and the overvoltage protection cut in. So now I am dead in the water waiting for another battery from China. Tomorrow I will be taking the new pack out and reinstalling my Leaf pack. Here is a picture of my progress
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Old 10-26-2020, 08:25 AM   #36
flyons78
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Default Re: Need a new lithium pack

Oh man, that's a bummer! Hopefully they can expedite that battery shipment and since it's a solo battery maybe it will go through customs faster. The build is looking good. I like the battery box design.
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Old 10-26-2020, 01:29 PM   #37
NoleFan4Ever
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Default Re: Need a new lithium pack

Looking good!
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Old 11-13-2020, 07:59 PM   #38
WalterM6
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Default Re: Need a new lithium pack

I guess I should have posted this here to start with:

Good news. I got my batteries installed today. The problem with the runaway battery was solved by top balancing the cells. They are all now within 10mv. Set my max voltage to 53.6V, 3.35 v/c. That is supposed to be 99% charge. The idea about the binding posts worked out good. I got all the big terminals connections secure with them. Btw I went with 4 ga for the B8-B9 connection, it was more flexible. I took it out to test drive and the performance was similar to the leaf pack. I took it up the biggest and longest hills and the neither the battery or the terminals showed any great heat increase. That was one of the things I was worried about because of the small bus bars and hardware. The only thing I have left is to calibrate the SOC reading. I am now a happy driver and at peace with the Chinese again.lol
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Old 11-15-2020, 11:29 AM   #39
davidgolfer
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Default Re: Need a new lithium pack

Quote:
Originally Posted by WalterM6 View Post
I guess I should have posted this here to start with:

Good news. I got my batteries installed today. The problem with the runaway battery was solved by top balancing the cells. They are all now within 10mv. Set my max voltage to 53.6V, 3.35 v/c. That is supposed to be 99% charge. The idea about the binding posts worked out good. I got all the big terminals connections secure with them. Btw I went with 4 ga for the B8-B9 connection, it was more flexible. I took it out to test drive and the performance was similar to the leaf pack. I took it up the biggest and longest hills and the neither the battery or the terminals showed any great heat increase. That was one of the things I was worried about because of the small bus bars and hardware. The only thing I have left is to calibrate the SOC reading. I am now a happy driver and at peace with the Chinese again.lol
Glad to hear it is working out
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Old 11-15-2020, 03:20 PM   #40
Wakko47
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Default Re: Need a new lithium pack

Do you mind sharing what your investment was overall? How difficult was the build for those of us that still try to put 9v batteries into a AA slot?
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