Uploaded January 2023 | Updated September 2026, 3 weeks ago
Welp, I screwed up, badly.
This video set out to test how different balance trigger voltage would affect parasitic loads over time. The results were inconclusive, and what's more, I had a major failure in a buck converter. Like, explosion and flames level failure. This video did not go how I expected it to go, but such is the life of a half-baked "scientist". :)
I put a note that I had recorded the values of the batteries before starting to charge them, but forgot to include it in the actual video. The values were not really indicative of anything, which is why I forgot to include them. In any case, they were:
====
Mac Deviation, average, pack, SoC%
BMS A: 0.004v, 3.333v, 53.33v, 73%
BMS B: 0.004v, 3.332v, 53.31v, 73%
BMS C: 0.002v, 3.333v, 53.33v, 73%
BMS D: 0.003v, 3.333v, 53.32v, 77%
BMS E: 0.001v, 3.332v, 53.31v, 97%
BMS F: 0.006v, 3.375v, 53.99v, 97% *
* Recorded after charging started
====
People have asked what the parts were on the buck converter;
* Diode: mouser.ca/ProductDetail/637-1N4007
* Capacitor: mouser.ca/ProductDetail/80-A759EA106M1JAAE60
* Buck Converter: mouser.ca/ProductDetail/490-P7812-500R
Special Thanks to:
* @ProjectBrupeg - youtube.com/@ProjectBrupeg
* Oz in Moz
* @LadyKSailing - youtube.com/@LadyKSailing
0:00 - What is the test, and why do it?
2:17 - Test Parameters
4:28 - Configuring the BMSes
7:30 - 3 Weeks Later, Recharge Plan
9:05 - Charging Pack F
13:07 - Charging Pack E
13:45 - Sparks! Fire! A very bad day...
15:07 - Taking in What Happened.
16:38 - On Self-Doubt
20:36 - Getting Back Up
21:10 - Jumping Cables, Flying Parts
22:42 - Did Anything Else Break?
24:05 - Restarting Charge of Pack E
25:30 - Charging up Pack D
27:04 - Charging up Pack C
29:31 - Improvised Circuit Breaker
30:36 - A Kitty Interlude
31:08 - Finishing up Pack C; Questions...
33:19 - Charging up Pack B
34:37 - Charging up Pack A
35:45 - Results and Topping-off the Bank
38:13 - Making Sense of a Null Result
40:01 - On Assumptions and Comments
42:02 - Future Post-Event Analysis
43:52 - What's Next?
Welp, I screwed up, badly.
This video set out to test how different balance trigger voltage would affect parasitic loads over time. The results were inconclusive, and what's more, I had a major failure in a buck converter. Like, explosion and flames level failure. This video did not go how I expected it to go, but such is the life of a half-baked "scientist". :)
I put a note that I had recorded the values of the batteries before starting to charge them, but forgot to include it in the actual video. The values were not really indicative of anything, which is why I forgot to include them. In any case, they were:
====
Mac Deviation, average, pack, SoC%
BMS A: 0.004v, 3.333v, 53.33v, 73%
BMS B: 0.004v, 3.332v, 53.31v, 73%
BMS C: 0.002v, 3.333v, 53.33v, 73%
BMS D: 0.003v, 3.333v, 53.32v, 77%
BMS E: 0.001v, 3.332v, 53.31v, 97%
BMS F: 0.006v, 3.375v, 53.99v, 97% *
* Recorded after charging started
====
People have asked what the parts were on the buck converter;
* Diode: mouser.ca/ProductDetail/637-1N4007
* Capacitor: mouser.ca/ProductDetail/80-A759EA106M1JAAE60
* Buck Converter: mouser.ca/ProductDetail/490-P7812-500R
Special Thanks to:
* @ProjectBrupeg - youtube.com/@ProjectBrupeg
* Oz in Moz
* @LadyKSailing - youtube.com/@LadyKSailing
0:00 - What is the test, and why do it?
2:17 - Test Parameters
4:28 - Configuring the BMSes
7:30 - 3 Weeks Later, Recharge Plan
9:05 - Charging Pack F
13:07 - Charging Pack E
13:45 - Sparks! Fire! A very bad day...
15:07 - Taking in What Happened.
16:38 - On Self-Doubt
20:36 - Getting Back Up
21:10 - Jumping Cables, Flying Parts
22:42 - Did Anything Else Break?
24:05 - Restarting Charge of Pack E
25:30 - Charging up Pack D
27:04 - Charging up Pack C
29:31 - Improvised Circuit Breaker
30:36 - A Kitty Interlude
31:08 - Finishing up Pack C; Questions...
33:19 - Charging up Pack B
34:37 - Charging up Pack A
35:45 - Results and Topping-off the Bank
38:13 - Making Sense of a Null Result
40:01 - On Assumptions and Comments
42:02 - Future Post-Event Analysis
43:52 - What's Next?
