Speak EV - Electric Car Forums banner

1 - 20 of 162 Posts

·
Registered
Joined
·
2,805 Posts
Discussion Starter #1 (Edited)

·
Registered
Joined
·
2,805 Posts
Discussion Starter #2
To save you watching the whole video... Basically, he says the car uses 100 x 12V 100Ah lead acid sealed batteries (PL100-12 POWERLINE ) costing £100 each, creating a 120kWh capacity for £10000.
 

·
Registered
Joined
·
2,203 Posts
Basically, he says the car uses 100 x 12V 100Ah lead acid sealed batteries (PL100-12 POWERLINE ) costing £100 each, creating a 120kWh capacity for £10000.
What is the total weight of the batteries?
 

·
Super Moderator
Joined
·
12,001 Posts
Deep cycle lead acid batteries are good for 200-300 cycles.


Every year or two, the car will need a new pack.

Even Ford and GM moved away from Lead batteries in the 1990s.
 

·
Registered
Joined
·
4,530 Posts
The kinetic energy of this vehicle on the road at high speed would worry me. I don't know how many tons the batteries weigh in total, but the weight won't be insignificant. I don't think I'd want one following me.

The good news is that at its top speed of 170mph it won't be following me for long :)

With no rapid charging, a 120kWh battery will take 17 hours for a full charge at 7kW. That's assuming a lead-acid battery can take 7kW - I don't know much about the chemistry, but I'm sure @donald will be along in a mo. :)
 

·
Registered
Joined
·
2,805 Posts
Discussion Starter #11
Weight and technology issues aside, he seems to be saying that lithium batteries cost £400 per kWh and the lead acid units cost £83 per kWh, based on the PL100-12 costing £100 each. Although I couldn't find similar for less than £125 each, and others were much more.

But wasn't the cost per kWh for EV batteries about £120 per kWh in 2019, and falling rapidly?
 

·
Super Moderator
Joined
·
12,001 Posts
With no rapid charging, a 120kWh battery will take 17 hours for a full charge at 7kW. That's assuming a lead-acid battery can take 7kW - I don't know much about the chemistry, but I'm sure @donald will be along in a mo.
A pack that big should be able to take up to 12kW easily. 22kW probably.


EDIT:

Powerline recommend C/10 which would be 12kW.
 

·
Registered
Joined
·
2,501 Posts
Weight and technology issues aside, he seems to be saying that lithium batteries cost £400 per kWh and the lead acid units cost £83 per kWh, based on the PL100-12 costing £100 each. Although I couldn't find similar for less than £125 each, and others were much more.

But wasn't the cost per kWh for EV batteries about £120 per kWh in 2019, and falling rapidly?
The guy is a complete tool and has totally missed the important part with regard to the costs per kWh.

The cost per kWh of capacity is only part of the equation. You also need to calculate the lifetime cost per kWh.

A simple example to show the point:

1kWh lead battery costing £200 with 300 cycles gives 300kWh costing £0.66 per kWh.

A lithium 1kWh battery costing £1,000 with 3,000 cycles gives 3,000kWh costing £0.33 per kWh.


Also with lead batteries you need to consider Peukerts law, equalisation charges, the time needed for that slow topping charge and the inefficiencies.

Hopefully its only his own money and time being wasted.
 
1 - 20 of 162 Posts
Top