Grid Charger
Grid charger owners and location, as well as some service links for hybrid services
Grid charger code V3.0 manual
Understanding the charging and balancing process
Labview datalogger
More silver pack testing
How to test a battery to the stick level on the bench
Remote monitoring of the charge process
Datalogging Labview style
The Big picture
getting a better overview
Getting past the drop out to see what is happening.
Drop out test needs more work
The signature of a cell drop out
Insight pack end of discharge full charge #1
Waynetc pack
Pack discharger
SOC reset device
Insight Battery pack lifter
Grid charger test adapters
Reprogramming the charger
Installing the Genesis One Universal grid charger in an Insight
Installing the Genesis One Universal grid charger in a First Gen Civic
Harness options
The Universal Grid Charger
MIMA Pack Whack and rebalancing the battery
Mikes Insight
EV Insight with a Prius heart
Grid charger Operating Instructions V1.2
Designing a PHEV system for the Civics, Insight 1 and 2 ------------Micro V-Buck PHEV
Doug's V-Boost
Randall's Insight
Paul's Adventures in alternative evergy
Western Washington University X-Prize car
Finding The Best Hybrid Mix
E-wheel for any vehicle

The signature of a cell drop out

The signature of a cell drop out
whole drop out event

For testing the pack discharger, we need to get some data on what a typical cell dropout looks like, so we can tune the dropout detection system.
This test version of the charger software allows us to hear a beep when the detection system wants to stop the discharge and start the recharge, but allows us to let it proceed past that point to be sure the detection caught a real drop out.
Here we see the cell drop out in three views, 1 as a part of the larger graph, 2, zoomed in with only the cell drop out filling the screen, and 3, using excel to graph the recorded data.
We see just about 1 V of drop at a much faster rate than the trend. One bit / 5 second samp-le, or about 20-30 seconds for the full drop. The discharge slope after the drop out went back to the same slope as before the drop out.
The detection system picked upthe drop out a bit after the second sample. Worked nicely.
You can see from this graph, that this 20-30 second event could have easily been missed just by looking at the display, as there is no trend line.
The Labview screen shot is part of the revised program taking into account some of the lessons learned last Sundays Labview class