Here’s what the power management board does.
Functionalities
Check the status of AUX Battery
Voltage
Temperature
Check the status of DCDC
I/Os
Functionality | I2C Chip | GPIO Pin |
|---|---|---|
Battery Voltage Sense | I2C - 0x48 | |
Battery Temperature Sense | I2C - 0x49 | |
Battery Current Sense | I2C - 0x48 | |
DCDC Sense | I2C - 0x48 (current and voltage sense) |
Questions
Question | Answer |
|---|---|
How do we access aux battery voltage and temperature? | Analog Inputs, voltage (voltage divider fed into buffer then controller) |
How do we find the status of DCDC? | Analog sensors (same as AUX) |
Do we have any protection for the AUX battery? | No built in protection on the board. Software fault can be made. Want to detect: over voltage (would like to discharge the AUX battery without having to remove battery) , under voltage (use time delay to check for under voltage dips), over current (current is analog input) Don’t necessarily need to cut power immediately with power spikes. |
Do we charge the Aux battery? | Would like to, but not a priority. (so no). |
What’s the valid range of the AUX battery voltage and temperature? | Using a 10s NiMH battery Voltage 9.4 V - 15 V Temperature Charge - 0 to 45 degrees C Discharge - -20 to 50 degrees C  |
Hardware Person
Josh & Micah Black
AUX Battery / DCDC Status
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