Four factors for electric car driving range

Electric cars can really on the road, the most critical factor is the improvement of driving range.Currently, major automobile manufacturers in the automotive power research, mostly concentrated in this part of the battery.Admittedly, the battery as a power source for electric vehicles, should be placed in the most important position.However, to greatly improve the driving range of electric vehicles, not just to assemble high-power battery pack, while there are many details that need to be overcome with current technology.
1 electric vehicle driving environment
The same electric vehicles in different driving conditions, will reach different maximum mileage.First, the temperature on the current widespread use of lithium batteries of electric cars a great influence on the energy of lithium battery applications are oxidation-reduction reaction, the release of ions through a chemical reaction to achieve the charge and discharge.Because the chemical properties of lithium is very lively, so at low temperature and high temperature conditions (winter / summer), the reaction of varying intensity, discharge density, battery life at different times, resulting in a different car mileage.
Secondly, with the traditional cars, wind direction and speed, road conditions and traffic situation is also affecting the city driving range of electric cars factors (urban traffic conditions, the current light-duty hybrid drive system to improve battery life and play an important role in environmental protection).
2 rolling resistance and air resistance
In theoretical mechanics, objects scroll impediment is called by the rolling resistance.Rolling resistance is usually caused by gravity, it is a torque effect.In other words, if the car heavier, movement is exposed the greater the rolling resistance.Therefore, to reduce the rolling coefficient can be improved to some extent driving range of electric vehicles.
Large-scale application of good aerodynamic tractor can reduce air resistance
Air resistance, by definition, is the car in motion and friction and air resistance generated.As the exterior design of electric vehicles and battery, the motor position, and therefore, compared to conventional vehicles, electric vehicles exterior design is quite flexible.Placed by a more reasonable composition of automotive interior parts, gives a more rational design, in order to reduce air drag coefficient, driving range may have increased accordingly.
3 cell parameters and performance
Electric vehicle battery is the most important part, need to explore many places.Here, just a simple analysis of how to improve battery technology to improve the driving range of electric vehicles, including battery weight, shape, energy density, discharge rate.
As the battery weight in the total weight of electric vehicles account for a high proportion of its size will determine the rolling resistance coefficient, thus affecting the driving range.
Cell shape is required to overcome the design challenges, one of the most current electric vehicles using lithium batteries for the column, hundreds of blocks arranged in combination can cause the battery size is too large, thus affecting the vehicle's structural design to reduce wind resistance, indirectly affect the continueddriving range.Currently, Nissan hear the wind and snow Folan Wo-blue plate-like lithium battery with the new design is the volume holds certain advantages for the future design of the structure of electric vehicles will play a catalytic role.
Energy density and battery discharge rate effects are an important factor driving range, high-energy batteries, discharge time is long driving range of electric vehicles to extend the key.Batteries have a long way to go, the same volume, the higher performance of nano-technology battery cells and solid-state technology is currently still in its infancy.
4 the energy consumption of auxiliary devices
Assist device not only means that we are familiar with lighting, sound, air conditioning and vehicle control systems, including brake system air compressor, power steering system hydraulic pumps and other auxiliary systems.These ancillary facilities except air conditioning, the integrated total energy consumption of 6% -12%.If they can reduce energy consumption, can provide more power output to the power system.To extend driving range.
In summary, to improve the driving range of electric vehicles requires the efforts of many scientists and research.Overall, mainly in batteries, if we can reduce the weight, reduced size, improved performance and enhanced environmental adaptability, will greatly increase the driving range.The electric cars to reduce drag, lightweight design and fixtures to reduce energy consumption can play a supporting role.