On Friday, January 5, 2018 at 5:56:02 PM UTC-5, [email protected] wrote: > > The board will not boot from the LiPo Battery. When I plug in the battery > no LEDs turn on. > > > I’m using a 1.6Ah / 7.4volt 2Cell Lipo battery. The battery shows 8.4 > volts with a voltmeter. > > > Pressing the Power Button or the Reset Button does nothing. If I plugin a > 12-volt power source into the barrel jack it will boot. > > > Once booted the Battery Charging LED will blink. The four battery status > LEDs will turn on and off in sequence for several seconds. > > Then they turn on solid for several seconds. It will continue this cycle > as long as no power is applied to the motor drivers. > > The 25% LED is always red and the other three are always green. > > > If I run rc_battery_check I see: > > Pack: 8.48V Cell: 4.24V DC Jack: 12.29V >
This is higher than the recommended 2S battery charge. I suspect the over-voltage protection might be kicking-in. We are setup for protection at 4.3V, so you seem to be floating pretty close. If the CHG_EN line goes low to disable the charger, the charger Overvoltage protection via http://www.ti.com/lit/ds/symlink/bq29209-q1.pdf --- provides CHG_EN Charging via https://www.monolithicpower.com/DesktopModules/DocumentManage/API/Document/GetDocument?id=3323 --- provides charge supply for the battery as well as the V_BATT that feeds the 5V regulator > > If I run rc_test_motors -d 1.0. I can run a motor from any of the motor > drivers. The Battery Charging LED will turn on solid while a motor > > is running and will go back to blinking when the motor is disconnected. > The four battery status LEDs will turn off if a motor is running. > > > I have not found any documentation on the battery status LEDs, so I do > not know what the LED's are telling me. > There is a software process that goes and reads the battery status via the ADC and outputs to the LEDs. https://github.com/StrawsonDesign/Robotics_Cape_Installer/blob/master/battery_monitor_service/rc_battery_monitor/rc_battery_monitor.c > > I left the 12-volt power source and LiPo battery plugged in over night to > ensure the battery was fully charged. But it did not help. > > > Am I missing something? Any ideas what is going on? > Can you try draining it in something else for a bit? > > Thanks, > > Keith > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/02c4a4ef-535e-4aa5-b248-806281a8503c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
