ℹ️ General

The BMS test plan, should verify that the Arduino code correctly measures pack/cell voltage and pack temperature, computes battery state of charge, and drives the green and red LEDs according to the specified behavior.

The tester should understand:

• The analog inputs used for cell voltage, pack voltage, and thermistor sensing.
• The conditions to trigger a change in response from the green LED and red LED.
• Working threshold for temperature sensing (25 to 85 deg C).

Expected outcomes of testing:

• Confirm the measured voltages and temperatures are within specified accuracy for
• Confirm the LED behavior matches the defined logic for battery percentage and over-temperature.

🔡 Inputs and Outputs

1. Inputs and Outputs

1 Power Inputs

• Arduino 5 V / Vin (8.6 V ) - Main supply for MCU and sensing circuits.

2 Signal Inputs

• A0 - pack_volt_pin
  • Measures pack voltage via resistor divider R1_pack_voltage, R2_pack_voltage.
• A2 - cell_volt_pin
  • Measures cell voltage via resistor divider R1_cell_voltage, R2_cell_voltage.
• A1 - temp_volt_pin
  • Measures thermistor divider voltage to compute pack_temp.

3 Signal Outputs