1. Measuring the Temperature and Voltage of a Lithium Ion Battery
Ian Buck

2. Outline
Purpose
The Battery
Procedure
Materials
Results

3. Purpose
The Purpose of the project is to test for battery life through charging and discharging. While charging and discharging, temperature must be monitored for safety.

4. The Battery: Specifications
Li-ion Battery
55 cells
175 Volts

5. Materials: NTC Thermistor
NTC Thermistor’s were used to read voltage and from the voltage, and temperature was calculated.
As the Temperature changed, so did the resistance.

6. Materials: Board Sensors attached to each battery cell
Thermistor’s attached to two cells in each row
Board then connects to Laptop

7. Materials: Software LTC6804/LTC6811 Multicell Monitor
Logs Data from board into an excel

8. Results: General input/output Temperature

9. Results: General input/output Voltage

10. Labview Program
The purpose of the Matlab program is to graph the data after the test, whereas the Labview Program is to show the temperature and voltage during the Test

11. Voltage
The program reads the voltage data from the data-log. The program displays the average voltage of each row. The graph is the voltage of the whole battery.

12. Temperature
For Temperature, the program displays the general temperature for each thermistor. The graph displays average temperature of all thermistors