Which energy storage technology is used in hybrid vehicles?

• A. Nickel Metal Hydride
• B. Lithium-ion
• C. Flow
• D. Nickel Cadmium

Answer: (A)

The main concept is how energy storage chemistry is chosen for hybrid vehicles. Nickel Metal Hydride batteries have been the standard for many hybrids because they offer a robust combination of safety, cost, and durability while delivering the high current needed for propulsion and rapid charging from regenerative braking. They handle a wide temperature range well and have a long cycle life, which fits the stop-and-go, frequent charging/discharging pattern of hybrid operation. Although lithium-ion is common in some newer hybrids and plug-in hybrids, NiMH was the typical choice in earlier and many current hybrids due to its favorable balance of performance and cost. Flow batteries are not used for vehicle propulsion and nickel cadmium is less favored today because of environmental concerns and lower energy density.