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01-25-2012, 07:47 PM
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Member
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Join Date: Dec 2008
Location: Rathdrum, ID
Posts: 48
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Re: NG3 chargers can't current limit on lithium batteries?
If you're not careful and pay close attention to what you're doing there is the real possibility of damaging your controller or worse, your entire pack. I'm trying to help people here, not destroy their vehicle or burn down their garage. A careful review of the possible hazards is well worth a little bit of time.
There aren't currently any timers in the prototype code. This will need to be added if you want to use them.
The nice thing though about the MPLAB design environment and the PicKit3 for programming/debugging is that you can set break points and monitor variables within the PIC device. This makes troubleshooting your initial setup a snap. I recommend anyone who wants to use one of these modules become familiar with the debugger and watch variables.
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01-25-2012, 11:14 PM
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Senior Member
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Join Date: Nov 2009
Location: Kelso, WA
Posts: 840
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Re: NG3 chargers can't current limit on lithium batteries?
Quote:
Originally Posted by bgeery
Have you taken a look under the stickers to confirm both your units are using ST62T25B6 microcontrollers? [...]
BTW, I was reading an old thread from 2005 mention the reprogramming fee was only $40 back then. ZivanUSA is double that now.
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No, I'll have to do that next time I get a chance. As for reprogramming cost, that is progress right?  Maybe the extra cost is so they don't have to answer our questions.
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03-04-2012, 08:31 PM
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Member
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Join Date: Oct 2011
Location: Yucca Valley, CA
Posts: 72
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Re: NG3 chargers can't current limit on lithium batteries?
Quote:
Originally Posted by customcircuits
I think at this point the best to get a few boards out and just let you guys help run some tests. I'll work on getting some boards ordered and assembled as soon as I can.
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Hi Dave. Any news on the boards yet? Just checking in.
__________________
Brent Geery
Yucca Valley, CA
2002 GEM e825 Converted to
25 160Ah LiFeYPO4 Cells
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03-06-2012, 05:33 AM
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Member
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Join Date: Dec 2008
Location: Rathdrum, ID
Posts: 48
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Re: NG3 chargers can't current limit on lithium batteries?
Sorry for the delay, I've been sidetracked. Boards are in, parts are in. I just need time to get them assembled and tested. I'll try to get them done soon.
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03-06-2012, 10:41 AM
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Member
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Join Date: Oct 2011
Location: Yucca Valley, CA
Posts: 72
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Re: NG3 chargers can't current limit on lithium batteries?
Quote:
Originally Posted by customcircuits
Sorry for the delay, I've been sidetracked. Boards are in, parts are in. I just need time to get them assembled and tested. I'll try to get them done soon.
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That's great! Take your time, I was just curious as to how things were going.
__________________
Brent Geery
Yucca Valley, CA
2002 GEM e825 Converted to
25 160Ah LiFeYPO4 Cells
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03-12-2012, 07:55 PM
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Junior Member
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Join Date: Jul 2011
Posts: 20
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Re: NG3 chargers can't current limit on lithium batteries?
Thanks for providing the schematic of the NG3 control board. Now I have a chance to replace the board with one which I'll design using discrete parts. I have been retired for 20 years and never did learn programming so I have to stick with the old fashioned way. I was stonewalled by the NG3 rep when i told him I had changed to lithium. I was always hopeful to get the Zivan reprogrammed, but in the meantime I designed a charger from scratch. It provides 10 amps at 135 volts. It starts with a button and stops when the current reduces to 1 amp. The hot parts are built on a heat sink and there is a fan. So far, so good. I have been thinking of making a 220v version so I could increase the current to 15 amps. BTW, my car is the 914 that I bought from Steve, who has a blog with lots of details of the car. My charger is modular and i will include schematics of each of the 5 modules after I learn how to convert them to pdf files. They are now *.eps.
Bob
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03-12-2012, 08:39 PM
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Member
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Join Date: Oct 2011
Location: Yucca Valley, CA
Posts: 72
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Re: NG3 chargers can't current limit on lithium batteries?
Quote:
Originally Posted by RWAEX
My charger is modular and i will include schematics of each of the 5 modules after I learn how to convert them to pdf files. They are now *.eps.
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zamzar.com will do an online converion of EPS to PDF. There are plenty of other free sites as well as software out there.
__________________
Brent Geery
Yucca Valley, CA
2002 GEM e825 Converted to
25 160Ah LiFeYPO4 Cells
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03-13-2012, 11:01 AM
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Junior Member
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Join Date: Jul 2011
Posts: 20
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Re: NG3 chargers can't current limit on lithium batteries?
I was able to convert my files to pdf. Now they are too big to insert. I'll work on that.
Bob
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03-13-2012, 11:04 AM
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Member
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Join Date: Oct 2011
Location: Yucca Valley, CA
Posts: 72
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Re: NG3 chargers can't current limit on lithium batteries?
Quote:
Originally Posted by RWAEX
I was able to convert my files to pdf. Now they are too big to insert. I'll work on that.
Bob
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If you ZIP comprees the PDF file, the message board allows up to 2.38MB attachments, instead of the measly 97.7KB it allows for most others.
__________________
Brent Geery
Yucca Valley, CA
2002 GEM e825 Converted to
25 160Ah LiFeYPO4 Cells
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03-13-2012, 11:17 AM
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Junior Member
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Join Date: Jul 2011
Posts: 20
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Re: NG3 chargers can't current limit on lithium batteries?
I shrunk the files.
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