That's probably a stretch; although it's the opposite side of that argument.
Case in point, my 1G Honda Insight - reasonable comparison, since they were talking about a hybrid vs a pure EV. Similar things could be said of the Prius.
The Insight's electric motor takes virtually no space. Think of it as a thicker than normal flywheel.
The motor in my MGR is also very small - about 10" in diameter and 5" thick. For the power they're talking about, refer to my statement about its power and spinning it faster. The entire MGR takes a tiny bit more space as a standard differential.
You're probably right about the battery. The battery pack of my Insight is very small - yes it doesn't store much energy, but it is made of air-cooled NiMh cells. High power Lithium cells would significantly boost the storage capacity with no weight or volume gain.
Something about 1/3 the size of the Nissan Leaf's pack would give 6kWh at 100kg.
Cooling system? The Prius and the Insight, as well as many other examples, use the existing cooling system. The 50kW MGR doesn't have an external cooling system.
If we're talking about a pure EV, you're right - partially, because a much larger battery pack is needed.
But to be fair, consider how much stuff you remove first. Engine, transmission, gas tank, replace large cooling system with small one, etc etc. In my EV, the net space AND weight is equal, so there's no net loss.
- E*clipse
Quote:
Originally Posted by samwichse
I like how they quote the weight of the drive axle/motor... but wait, what about the weight of the batteries to power the thing? That's going to be another 100kg and a chunk of your trunk space if you want a plugin hybrid from this thing.
Also, 65kw from a 20.9kg motor means it's going to need to be water cooled. So radiator, piping, water fill, pump to add to that weight.
All in I'm going to say you're going to add 200-220kg to your car and take up half the trunk if you want to use it.
Sam
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