Resistance-Testing Plan

GOAL: Measure Resistance of current-pack with more-precision for pack characterization. Module to Module, Cell to Terminal Busbar

Test set-up:

• Range: up to 1 micro-meter

• Test Set-Up:

  • Pass high (known) current and measure voltage drop - have known shunt resistors (in the bay) so we can use that to ensure current measurement is accurate

    • Elec - test takes 10 minutes to do

  • For measuring resistance in-between pack: measure resistance of pack, and subtract the resistance of the cells - source a measure unit from school labs

  • To-dos: create a set-up for measuring very-accurate low-voltage readings

    • As high current as possible

    • Multimeter

    • Can be made by firmware though not required

• Battery Impedance Meter - more detailed behavior, AC (not needed)

• DC determines real-life behaviors whereas AC is a standardize-way of comparing between-cells

Resources:

• https://www.linkedin.com/pulse/what-dcir-acir-eis-meaning-all-three-whats-difference-connection/

• https://www.batterydesign.net/battery-cell/dcir-of-a-cell/

• https://www.electronicdesign.com/technologies/test-measurement/article/21246713/keysight-technologies-measuring-acir-of-lithium-ion-cells