Hybrid vehicles testing

Test cells using the above graphite materials were evaluated in PC-based electrolytes. For this work, the hybrid pulse power characterization (HPPC) test was performed on cells with the different graphite anodes and PC-based electrolytes to evaluate their high power capabilities. These electrochemical experiments indicate that cells containing the surface-modified natural graphite can meet the power requirement set by the FreedomCar partnership for the hybrid vehicle applications. 

Nickel-metal-hydride batteries of both prismatic and cylindrical cell designs are now available for automotive use. In 2003, the fleet of hybrid vehicles with Ni-MH batteries is more than 100,000 world-wide, most of these are in Japan. This can be considered as a significant and reliable fleet test that demonstrates the maturity of this battery system for automotive use [70]. 

Figure 21.7 shows rate capability, temperature characteristics, cycle Ufe, and overcharge test of the above battery. The battery performances are exceUent The most important point is that this battery is highly safe. Figure 21.7d shows the result of the overcharge test. The temperature of the battery increased with increasing charge capacity, but it showed maximum temperature at 57°C and no further temperature increase was observed. Those batteries will be used for the electric tools, electric bike, hybrid vehicle, and pure electric vehicles (EV). 

Figure 21.7 Fuel-cell test drive cycle based on a fuel-cell hybrid vehicle operating on the US06 drive cycle [21].

As of July 2004, DOE has completed 1 million miles of hybrid electric vehicle testing. The number of each type of hybrid electric vehicle tested, the total miles accumulated, and average fuel economy to date include ... 

Test Requirements for Rechargeable Batteries Needed for Electric and Hybrid Vehicles... 

Using the example of a power module (integrated in electric and hybrid vehicles) and an electrolytic capacitor, it will be examined whether this approach is universally valid. A Weibull analysis of test results for this component showed a significantly increasing failure rate due to mechanical stresses caused by thermal cyclical of the component during operation. The test analysis for aluminium electrolytic capacitors showed a similar result. 

Table 3. PNGV battery system goals for Hybrid Electric Vehicles. Test procedures are available...

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