June 30 22 - Battery Chat with Micah

Owned by Rodrigo Tiscareno
Last updated: Jul 15, 2022 by Alicia Bremer
2 min read

Other Project Ideas

  • GPS wave points along the route - elevation profiles

  • SOC - calculate battery power to calculate energy and power

  • Aerodynamics Model

Solar car motors will have efficiency score and curves. These are gathered from motor supplier information specifications.

The Data We Receive from the Battery Packs

  • Ideal voltage force, internal resistance, current suffers losses over that voltage

  • Power losses across that resistors

  • Voltage and current information from the battery —> we might need to compute power numbers ourselves

Calculating Power from the Batteries - Columb Counting 

Full battery pack - subtract current capacity which is acquired from the current at each time interval

 

  1. Measure voltage, current, and time interval 

  2. Voltage x (current x time interval (h)) = current capacity   

  3. Full Battery Pack Capacity - Current Capacity = Amount Remaining

  4. For total expended capacity, it would be the summation of all time interval capacities

Some factors that affect power transmission:

  1. Power loss because of the current going through resistor and losing energy through heat transfer.

  2. State of Health - total capacity of the battery pack of current state versus brand new.

 

For strategy models - need to know ways energy is lost, in addition to the energy for the motor and resistance:

  1. Aerodynamic losses

  2. Elevation

  3. Weather

 

 

Solar Arrays

  • Solarsense board - hardware team is designing 

  • Similar to batteries -> use measurement from solar sense board WH —> how much energy we have from the solar sense

  • Current measurements on individual motors — how much energy each motor is using 

  • Analyzing motor performance 

  • Hardware team —> max power point trackers from car to measure energy

    • Based on solar power curve → there is a point along the curve where power is maximum