Video by Lightning Ryan Fulcher via YouTube
Source
20230217 Update: The testing traction battery pack is composed of three 50Ah LiFePO4 (4s) 12v modules that are rated for 3C continuous. I’ve labeled these module (C,D,E) for reference. It turns out that I must have used module E for some other task and neglected to recharge it when done. Because it was very out of balance from the other two modules, though not to the point of causing any damage or degraded performance. The recharger using an iCharger x12 hobby charger was at 10Amp but quite a pit of the 20:17:10 (20hours) was spent at a much lower 2~3amps while the balancing leads blead off the excess charge current from modules D and C. Normally this process would be much faster and less wasteful of both time and energy:
* Start Module E: 3.262, 3.253, 3.257, 3.257v –
* Start Module D: 3.325, 3.325, 3.325, 3.323v –
* Start Module C: 3.330, 3.328, 3.334, 3.332v –
* Spent 20:17:10, 42.019v, 38.936Ah, mostly for balance bleeding off the two high modules
* Finish Module E: 3.378, 3.371, 3.378, 3.376v – 1.9 1.8 1.5 3.1mOhm –
* Finish Module D: 3.547, 3.548, 3.554, 3.538v – 1.3 0.7 0.8 1.9mOhm –
* Finish Module C: 3.569. 3.561. 3.585. 3.565v – 1.1 0.9 1.0 1.0mOhm –
* Finish Module E: 38.88, 38.93, 38.91, 38.91Ah
* Finish Module D: 10.76, 11.03, 10.84, 11.28Ah
* Finish Module C: 9.858, 10.00, 12.97, 9.724Ah
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20230211 Elec-Trak E15 Work Session One
: Who: Jay Donnaway (SeattleEVA.org President) and Lightning Ryan Fulcher (In plaid jacket)
* This machine was originally restored in 2011 by Gary per: https://www.builditsolar.com/Projects/Vehicles/E15ElecTrak/Main.htm
* 04:15 https://youtu.be/NpdyS0HJIXE ElecTrak E15 20230211 132246 003 E20 Needs TLC
** Do Not Panic!! This E20 IS NOT the one we are fixing up for you!
* 04:31 https://youtu.be/nzEbUiYVvEE ElecTrak E15 20230211 143250 004 Pulling Dead Lithium
** These are a pair of full 36v Lithium packs, both very dead, being removed
* 25:01 https://youtu.be/uXzt2flu5WQ ElecTrak E15 20230211 153121 006 Start New Control Solder
** This is the SepEx Field Weakening speed control board being replaced.
** The throttle seems to have three speeds which engage these resisters to weaken
**: The separately excited field windings, which increases the power/speed.
*** https://freerangeelectric.com/index.php?main_page=product_info&cPath=1_8_17&products_id=145
*** https://freerangeelectric.com/index.php?main_page=product_info&cPath=1_8_17&products_id=63 The part we speculated about that was missing from old burnt out board a "Replacement varistor. ROHS Compliant"
** The highest speed also engages the "toaster" nichrome at front of hood, I think
* 29:01 https://youtu.be/2wL0MAaGl_w ElecTrak E15 20230211 161950 007 Test Bat First Run
** Installing a temporary LiFePO4 Jag35 50Am 12v*3series pack and initial drive
*** https://jag35.com/products/slm12-lifepo4-12v-50a-4s-battery $99 need three(3)
* 27:35 https://youtu.be/vNMFjt7yM0Y ElecTrak E15 20230211 164906 008 First Drive Resistor checking
** Tooling around the yard and hand testing on the new board resistors heating up.
** We sure could have used a "Shift Pattern Decal" https://freerangeelectric.com/index.php?main_page=product_info&cPath=1_8_17&products_id=137
* 13:03 https://youtu.be/JmyDpRUx7SA ElecTrak E15 20230211 171822 009 Accessories
** Checking out the Accessories: Mower Deck, Rear Lift, Snow Blade, Tiller(Yet to acquire)
* 05:09 https://youtu.be/YM6QkD5s9zQ ElecTrak E15 20230211 173423 010 Mower Deck testing
** Spinning up the mower deck
* 02:32 https://youtu.be/zasatftyNXk ElecTrak E15 20230211 173940 011 Parked until next time
** Parking in shed until next work session
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20230226 Elec-Trak E15 Work Session Two
: Who: Jay Donnaway (SeattleEVA.org President) and Lightning Ryan Fulcher (In plaid jacket)
* This machine was originally restored in 2011 by Gary per: https://www.builditsolar.com/Projects/Vehicles/E15ElecTrak/Main.htm
* 38:37 https://youtu.be/YWcgz8Cot5U ElecTrak E15 20230226 164052 016 RestoreRearAccessoryMountCompatibility
* 52:31 https://youtu.be/oVnkVPuvTEE ElecTrak E15 20230226 155910 018 HalfHourDriving TestingAccessoryMotor
