EV Conversion Basics - Calculating Components
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- Опубліковано 20 тра 2024
- electricbimmer.com
/ electricbimmer
In today's installment of the EV Bimmer series, we discuss how to get started with quantifying the basic components you may need in your electric car conversion.
To do this, we go over calculations regarding volts, amps, kilowatts, kilowatt hours, amp hours, watts per mile, kilowatts to HP, and a bit more. All of these are important in finding out what category of components you need to look for.
You can use these to work your way back from, say, horsepower, and figure out how many volts and amps your system should have to give you that amount of performance. - Наука та технологія
That is a lot of very good information. Thanks for letting us know. I appreciate it. Now let's try to charge the batteries while running. Thanks again
excellent presentation
Thank you very much
I think i could follow this complicated stuff via a doc i could reread many times
Thank you Sir
In the last minute of your video, you mention British horsepower (no such thing). I think you were referring to bHP which is brake HP. But what you calculated was actually the Thermal HP (tHP).
As you convert battery power units to HP units you are doing a thermal equivalency. The power actually measured at a turning shaft after losses etc, is the brake HP.
bro it's 69000/1000= 69kwh
21:59 - Actually, I think you'll find that is BRAKE HORSEPOWER...
Defined as the mechanical horsepower; the net available hp(l) at the shaft, at specified rpm and full load amperage.
But most IC engines, are equipped with datasheets indicating power output in kW. So very little need to use the horsepower convention.
It is now mostly used as an aid to memory/comparison with older engines/vehicles.
Thanks for this, really helpful formula for me to worth. Thanks afain
Hi, thanks for your great work. Can you please explain how we can calculate the max speed which can be reached?
That depends on multiple factors. The most notable, being if you are going to keep a transmission in the car or convert the drivetrain to eliminate a transmission. Other factors include weight and aerodynamics.
I can help...
Can we take 12volt supply from hybrid system?
good video, but how do you get 480Ah at 15:37, when you connect 12x12v car batteries in series not in parallel? Does that mean you could go on 480Amps one hour at 144Volts? like 480*144=69120W for one hour, and if you take one battery instead of 12, you get 40*12=480W for one hour, now 69120/480=144 times more energy stored, not the 12 times. 16:31 69000/1000=69
Very bad math explination. 69000wh is 69kwh not 6.9kwh, but as you said 12 lead acid car batt conecterd in paralel then the result 6.9kwh is correct but voltage is 14.4V for all bats together and for people who doesn’t know electronic basics your explination is very confusing. Still excellent concept explination.
Hey! What is the calculation you have taken for 3500lbs/10 in car range calculation?
We want to calculate our electric vehicles range per charge.
So that comes to 350 watts per mile if you had a 35 kilowatt battery pack you could drive a hundred miles. There is one fudge factor with this formula and that's how fast you're driving. This usually turns out to be somewhere between 40 to 55 miles an hour. I've noticed that the bigger something is the faster it seems to be able to go and still maintain this ratio. I have a 6000 pound Electric f500 1956 and a 19 68 Austin Morris that weighs about 2400 lb and that's what I've observed.
I'm still confused in what determines in the system how many amps it uses. Is it how many amps the controller pulls out of the batteries? And do the batteries have a amp rating or is it just AH and V? I'm still trying to understand how the amps relate to the battery system.
At 16:35 you divide /2 then multiply per 0.8 but it was already lithium so it was not to be just 0.8 as you did in the next calculation?
he used 12 Lead acid batteries.
350 watt electric motor with 20 amp controller can be connected to 30 or 40 amp battery?
Hi I am new in that kind of project but I really want to transform my Mini Cooper 2010 so I already have 2 motor ho come from a forklift and first 1 is the drive motor 36/48 volts 17 inch long and 13 inch wide and the other one is the hydraulic pump motor and on the motor it is a 12.8 kw so my question is witch one I should take to use in my car and what is the controller I need and how many batteries I need to make around 40 miles or if I want to make more mileage what should I buy P/S I know the motor is not the end of the world but not inoff money for now, I will appreciate if you can help me with this
Thank you
I forget I will keep the manual 6 speed transmission
Do you have the formula in kg / km instead of pounds / mile?
British horse power?
I did not realize that we Brits had a proprietary interest in the horse power business.
We do have very nice - very friendly - horses.
But we tend to think in terms of "brake horse power", and the exchange rate is 746 watts per horse power, plus the occasional sugar cube.
Yes it should be 69kW
Question: If you're batteries are fully charged and you’re traveling at the speed of light, when you turn on your headlights, will anyone see you coming? It's a fair question.
But to get 144 you need another 12 in series. Times 12 to get 40ah x12 @144v
you do not touch the C-rating of a given battery, which is the most important :-(
69000 Wh = 69kWh mistake
What about battery weight? Don't you have to ad that to vehicle weight
Right. Vehicle weight should be total weight... including yourself and your cargo.... he's just estimating here.
Gerrit van Rooyen don’t forget you should subtract the weight of the gas motor, alternator, and gas tank.
Yes, you do have to add the bateríes Weight to your calculations.
Anyone wanna convert my r32 gts t?????
car batteries are 12v 48amps wtf?
edit:
electronics.stackexchange.com/questions/246085/how-many-amps-can-a-car-battery-supply
I stand corrected
Oh come on! use a black marker!
Jacques LeBeau, everyone knows you only use black markers with internal combustion engine presentations!!!
Why are you dividing by 10, you never told us what the 10 stands for, is it miles? wtf man?
Hey I have explanation in my book...if u could send me mail id..or any messenger..I can send this explanation to u..
Seeing howt this is an old video, I'm hoping that you already learned your lesson about making videos and not being prepared. Anyhow, a battery has a DOD or depth of discharge and SOC or state of charge and together they add to 100 per cent. If the depth of discharge or DOD is 20 per cent then SOC is 80 percent and vice versa. Keep up the good work but remember, if you're confused so is your audience.
no.
69000 Wh are 69 KWh, not 6.9KWh. You have some fails in your calculation.
Maybe if you make a video on maths you should have a clue........
battery maths suck..