2010 Toyota Prius-6063 Hybrid BOT Battery Test Results

Test results for the beginning-of-testing battery testing are provided herein. Battery test results include those from the Static Capacity Test and the Hybrid Pulse Power Characterization (HPPC) Test1.
Static Capacity Test Results
Static capacity test results are summarized in the fact sheet. The test was perfomed on July 15, 2009 with a vehicle odometer reading of 93 miles. The measured average C/1-rate capacity was 6.09 Ah compared with the manufacturer’s rated capacity of 6.5 Ah. The measured average energy capacity was 1310 Wh. Figure 1 is a graph of battery voltage versus energy discharged. This graph illustrates the voltage values during the constant current discharge versus the cumulative energy discharged from the battery at a C/1 discharge rate.
HPPC Test Results
HPPC test results are summarized in the fact sheet. The peak pulse discharge power at 10 seconds and 1 second into the pulse are 19.6 kW and 27.9 kW at 50% SOC respectively. The peak pulse charge power at 10 seconds and 1 second into the pulse are 18.1 kW and 26.8 kW at 50% SOC respectively. The maximum and minimum cell voltages used for this analysis were 1.5 V and 1.0 V respectively.
Figures 2 and 4 illustrate the battery’s charge and discharge pulse resistance graphs which show internal resistance at various depths of discharge. Each curve represents the resistance at the end of the specified pulse interval.
Figures 3 and 5 illustrate the battery’s charge and discharge pulse power graphs which show the useable power at various depths of discharge. Each curve represents the pulse power at the end of the specified pulse interval at the cell voltage limits.
Figure 6 is a plot of the battery’s HPPC 10 second pulse power as a function of state of charge. The graph shows the power values over the range of state of charge as well as the DOE target performance goals of 25 kW discharge power and 20 kW regenerative power for a hybrid minimum power assist battery. The battery did not meet the DOE power perfomance goals for any battery state of charge range at the time of testing.

Source