2012 09 16

Written by chivey on September 16, 2012 Tags: Uncategorized

Retro’d the warning circuit from the battery management to the “Generator” light on the dash. Note “Oil” is already connected to the motor overheat circuit.

Retro'd the warning circuit from the battery management to the "Generator" light on the dash. Note "Oil" is already connected to the motor overheat circuit.

2012 08 29

Written by pc-import on August 29, 2012 Tags: Uncategorized

StealthBus Cinema

What we’re dealing with here is a complete lack of respect for the law

Video projector on tripod - wired into aux of the pre-amp

Note the high quality rear projection "shower curtain" - frosted (of course). With Donnie and Dugi.

Smokey and the Bandit - classic!

2012 08 24

Written by chivey on August 24, 2012 Tags: Uncategorized

Is going to BugBlast – McCalla, AL…

2012 08 17

Written by chivey on August 17, 2012 Tags: Uncategorized

It's lowering time!

2012 08 14

Written by chivey on August 14, 2012 Tags: Uncategorized

Started a new binder and notebook… First page is only remaining page of the previous one… 🙁

2012 08 02

Written by chivey on August 2, 2012 Tags: Uncategorized

DOH! – This morning while driving Gwen to induction day at Taylor Elementary, I forgot to shut the engine access hatch. On top of it was my notebook and ring binder with all my engineering notes from the last 3 years!

It wasn't until I got to the office I noticed, by then the notebook and ring binder had dropped through the hatch and on to the road…

I did find 1 page from binder and 1/2 page from the notebook at the entrance to the school… if you picked either please let me know.

2012 07 29

Written by chivey on July 29, 2012 Tags: Uncategorized

Connected up the SOC output to the fuel sender. With a bit of calibration (and a 470ohm resistor)…. Voila! Full = Fully charged.

Connected up the SOC output to the fuel sender. With a bit of calibration (and a 470ohm resistor).... Voila!  Full = Fully charged.

2012 07 25

Written by chivey on July 25, 2012 Tags: Uncategorized

Cleaned all terminals and bus bars… now all cells above 3.09v during 160A test run. Well except cell 26… pesky thing… cleaned again just for good measure, too late tonight for another test run. Will try full scale test in the morning, when I drive to work!

2012 07 22

Written by chivey on July 22, 2012 Tags: Uncategorized

Fixed a minor BMS issue cell 26, was causing bank C to report only 2 cells. Replaced the cell board. All 12 reporting in correctly. Still finding "rtv" under the bus bars. Only another 20 to check…

2012 07 11

Written by pc-import on July 11, 2012 Tags: Uncategorized

Mystery Missing Volts – Solved

Plot after cleaning the terminals with alcohol and re-assembling.

Plot of Amps (blue) vs cell terminal voltage for Cell 11. The reading sags under heavy load.

Disassembling the terminals (note these were pre-assembled in the factory) I discovered what appears to be RTV or something like it... whatever ever it was it didn't conduct electricity very well...

Shot of terminal. The only contact was the actual screw threads, this explains the voltage drop.

From the datasheet. Note even at 3C (300A), should never go below 3.0v until you are beyond 80% of capacity.