Current Profile drive cycle

[Mrzhang-hub]

The battery type I used is different from yours, including nominal capacity and so on. If I want to use these four current profile drive cycles in my paper, should I change the current value or keep it unchangeable?

[davidhowey]

That depends on whether you want to scale the current to the new capacity of the battery that you are using; if you do, then you can normalise the current to a "C-rate" and then keep that fixed. C-rate is defined as current (Amps) divided by battey capacity in Amp-hours. For example 1 A for a 2 Ah battery is "0.5C"; if you then wanted to use a 5 Ah battery instead you would scale the current to 2.5 A.

[Mrzhang-hub]

That depends on whether you want to scale the current to the new capacity of the battery that you are using; if you do, then you can normalise the current to a "C-rate" and then keep that fixed. C-rate is defined as current (Amps) divided by battey capacity in Amp-hours. For example 1 A for a 2 Ah battery is "0.5C"; if you then wanted to use a 5 Ah battery instead you would scale the current to 2.5 A.

Thanks for your clear explanation. I got it. By the way, I wonder if these four current profile drive cycles in the data file are calculated with a battery capacity of 2.7Ah?

[manjunathnilugal]

Hi,
The drive cycle data for UDDS and US06, are for what capacity of the battery.
I have to simulate drive cycle for 1.65 Ah battery, is there any method to scale it down ?
https://github.com/Battery-Intelligence-Lab/SLIDE/tree/master/data/profiles/drive_cycles

Regards,

[ElektrikAkar]

Hi,

When we scaled these profiles we were using 2.7 Ah battery, so we made the maximum current 8.1 A to create a profile with maximum C-rate of 3C current. Depending on your needs, you may scale it to be 1C, 2C or any Crate. You just need to divide values by maximum value (8.1 in this case) and multiply them by your desired C-rate and capacity. If you want to get a 2 C current for your 1.65 Ah battery then:

(profile/8.1)21.65 should give you the necessary scaling.

Lastly our current convention is: positive = discharge, negative = charge and values are given with 1 seconds time step.

Yours sincerely,
Volkan

[sntpham]

I have a similar question, what method do you use to determine current's profile. I know the UDDS only give us velocity. Do you use simulation for this task?