New Electric Car

5090 Views 23 Replies 6 Participants Last post by EVEngineeer, Aug 26, 2013

Skywalkerkenobi

Discussion Starter · Aug 24, 2013

How much hp do I need to get a top speed of 100 miles. The car will be a vw golf.

I will have a 14400 ah capacity battery.

Can someone please recommend a motor?

What range will I get at 55 to 60 miles an hour?

Also, can someone also give me a list of components I need for my conversion.

Thank you so much!

Save

1 - 4 of 24 Posts

Duncan

· #4 · Aug 24, 2013

Hi Skywalker

14400 ah
That is an odd number!
Are you sure it is not 14400 mAh?

You will also need to tell us about the voltage

Volts x Ah = Watthours - this is the energy - depending on the car it will take 200 - 300 watthours to go one mile

430Kg of lithium batteries will be about 40Kwatthours - 130 miles range
430 Kg of lead acid will get you around the block

Save

Duncan

· #6 · Aug 25, 2013

Skywalkerkenobi said:
I am sure it is 14400 ah.

The voltage for each battery is 3.2 V

very good
now how many batteries do you have?

Save

Duncan

· #17 · Aug 26, 2013

Skywalkerkenobi said:
But I only 144 volts for the motor.

72 batteries X 3.2 volts is 230.4 volts. That is too much!!

What do I do?

72 x 3.2 = 230v

You can have 230v and 200Ah
Single string all cells in series
Or
two strings of 36 x 3.2 = 115v
115v and 400Ah
Two strings of 36 cells in parallel (2 x 200 = 400Ah)

Or you can use a DC motor - (Warp 9/11 or ex forklift) and a Soliton Controller that will use 230v and drop it to a lower voltage for the motor

Save

Duncan

· #20 · Aug 26, 2013

Skywalkerkenobi said:
I really want to use a ac motor.

If I use a controller to lower the voltage, am I wasting charge from the batteries????

I think your two string solution might work for me.

I really want to use a ac motor.
AC is the way of the future BUT at present it is a lot more expensive for the same performance than DC

If I use a controller to lower the voltage, am I wasting charge from the batteries????
No
Controllers are power in = power out devices
At low speed your motor only needs a few volts
Motor - 23v - 1000amps
Battery - 230v - 100amps
23v x 1000amps = 230v x 100amps (the controller does the = step)

I think your two string solution might work for me.

You can use two separate strings but it is normally better to double the cells up and then couple then into a single string
they are the same thing but the second way copes better with cell variability

See less See more

Save

1 - 4 of 24 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month