Week 4 Challenge
Everything depends on the charging point used and the battery capacity of your electric car.
In practice, the charging time for an electric car battery may vary between 10 hours to half an hour. Sure, it's longer than filling up a conventional car. But in the future, with the development of new solutions, it may be just a few minutes!
Excluding sports and upmarket models, most electric cars are recharged in 8-to-10 hours on any 230 V power outlet through a cable with an adapter provided by the vehicle manufacturer.
The ideal is to charge electric cars at night unless they can benefit from electricity produced by your solar panels!
Sibelga has developed a simulator that can calculate the recharge time for your batteries according to their capacity and the features of your charging point.
But of course you can also do the calculation yourself:
Divide the load power by 1,000 for a value in kilowatts.
For example: 3,680 W = 3.7 kilowatts
Divide the power of your battery (also in kW) by the figure obtained to get the charging time.
For example: 24 kW/ 3.7 kW= 6.5 hours
First calculate your load power (P), by multiplying the voltage (U in volts) by the current (I, in amps). You get a value in watts.
P = U x I
For example: 16 A x 230 V = 3,680 W
Note that electric car manufacturers usually provide a charging device with a cable for standard sockets. This includes a security system that lowers the amperage to prevent overheating. Result: the charging time is increased but there is greater safety!
Journal of Energy Storage
Volume 15, February 2018, Pages 228-244
Battery cycle life test development for high-performance electric vehicle applications
Author links open overlay panelQuirinKellneraJamesMarcoa
https://doi.org/10.1016/j.est.2017.11.019
Get rights and content
Under a Creative Commons licenseopen access
Highlights
•
Existing battery cycle-life tests do not represent high-performance (HP) scenarios.
•
Two new methodologies for duty-cycle development are established.
•
New duty-cycles are developed and validated using a database of HP drive-scenarios.
•
HP duty-cycles cause substantial increase in cell temperature.
•
New duty cycles will facilitate tests to study impact of HP on battery degradation.
Abstract
High Performance (HP) battery electric vehicle (BEV) and racing applications represent significantly different use cases than those associated with conventional consumer vehicles and road driving. The differences between HP use cases and the duty-cycles embodied within established battery test standards will lead to unrepresentative estimates for battery life and performance within a HP application. A strategic requirement exists to define a methodology that may be used to create a representative HP duty-cycle. Within this paper two methods HP duty-cycle design are evaluated and validated. Extensive simulation results into the electrical performance and heat generation within the battery highlight that the new HP duty-cycles provide a more representative duty-cycle compared to traditional battery test standards. The ability to more accurately predict the performance requirements for the battery system within this emerging and strategically important BEV sector will support a range of engineering functions. In addition, the ability to more accurately define the use-case for a HP-BEV will underpin ongoing experimentation and mathematical modelling to quantify the associated cell ageing and degradation that may occur within HP vehicle applications.