25-06-2012, 05:35 PM
Hybrid Electric Vehicle
Hybrid Electric Vehicle.pptx (Size: 2.52 MB / Downloads: 75)
Advantages of HEV’s
HEV contains parts of both gasoline and electric vehicles in an attempt to get the best of both worlds.
HEV is able to operate nearly twice as efficiently as traditional internal combustion vehicles.
Equivalent power, range, cost and safety of a conventional vehicle while reducing fuel costs and harmful emissions.
The battery is continuously recharged by a motor/generator driven by the ICE or by regenerative braking.
Components of HEV Battery system
Battery:- Two or more electrochemical energy cells connected together to provide electrical energy.
Generator:- The generator is similar to an electric motor, but it acts only to produce electrical power.
Electric motor:- Advanced electronics allow it to act as a motor as well as a generator. For example, when it needs to, it can draw energy from the batteries to accelerate the car. But acting as a generator, it can slow the car down and return energy to the batteries.
SOC:- The State of Charge of a battery is its available capacity expressed as a percentage of its rated capacity.
HEV battery system design parameters
Factors affecting battery performance
Temperature:- Battery performance is highly dependent on temperature.
each type of battery works best within a limited range of temperatures.
Battery age/Shelf life:- Corrosion is the main component behind decreased
performance in lead acid type batteries by age.
Depth of discharge:- Batteries are able to maintain their performance longer
when they are not deeply discharged regularly.
Design parameters:
How much space is available for the batteries?
How much can they weigh?
What is the desired range?
What is the weight of the vehicle?
What is the targeted vehicle cost?
How will the batteries be recharged and
What kind of drive system requirements is needed?
These are necessary questions because of the variety of battery types
available and the differences between them. The chart below lists the
characteristics of the most common types of batteries.
Hybrid Electric Vehicle.pptx (Size: 2.52 MB / Downloads: 75)
Advantages of HEV’s
HEV contains parts of both gasoline and electric vehicles in an attempt to get the best of both worlds.
HEV is able to operate nearly twice as efficiently as traditional internal combustion vehicles.
Equivalent power, range, cost and safety of a conventional vehicle while reducing fuel costs and harmful emissions.
The battery is continuously recharged by a motor/generator driven by the ICE or by regenerative braking.
Components of HEV Battery system
Battery:- Two or more electrochemical energy cells connected together to provide electrical energy.
Generator:- The generator is similar to an electric motor, but it acts only to produce electrical power.
Electric motor:- Advanced electronics allow it to act as a motor as well as a generator. For example, when it needs to, it can draw energy from the batteries to accelerate the car. But acting as a generator, it can slow the car down and return energy to the batteries.
SOC:- The State of Charge of a battery is its available capacity expressed as a percentage of its rated capacity.
HEV battery system design parameters
Factors affecting battery performance
Temperature:- Battery performance is highly dependent on temperature.
each type of battery works best within a limited range of temperatures.
Battery age/Shelf life:- Corrosion is the main component behind decreased
performance in lead acid type batteries by age.
Depth of discharge:- Batteries are able to maintain their performance longer
when they are not deeply discharged regularly.
Design parameters:
How much space is available for the batteries?
How much can they weigh?
What is the desired range?
What is the weight of the vehicle?
What is the targeted vehicle cost?
How will the batteries be recharged and
What kind of drive system requirements is needed?
These are necessary questions because of the variety of battery types
available and the differences between them. The chart below lists the
characteristics of the most common types of batteries.