Quixotix
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Under the Hood Picture

Mon Jul 12, 2010 2:07 pm

This photo is from Motortrend. It appears that they took it at the test drive of the "production model" which Nissan held recently for the press in Japan.

Image

http://www.motortrend.com/roadtests/alternative/1006_2011_nissan_leaf_japanese_spec_drive/index.html

There seem to be 2 radiator style caps. Why 2? Do the inverter and motor have separate cooling systems?

Second, it sure looks like a lead acid battery in there. I assume that is the "accessory" battery. But why use a lead acid one?

AndyH
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Re: Under the Hood Picture

Mon Jul 12, 2010 2:12 pm

http://www.mynissanleaf.com/viewtopic.php?p=6989#p6989

It's a lead-acid aux battery but it's thinner than usual.

The charger is likely in the box with (or part of) the inverter. It and the motor are water cooled. It's possible that they have separate cooling systems but we haven't figured that out yet.

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EVDRIVER
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Re: Under the Hood Picture

Mon Jul 12, 2010 2:29 pm

AndyH wrote:http://www.mynissanleaf.com/viewtopic.php?p=6989#p6989

It's a lead-acid aux battery but it's thinner than usual.

The charger is likely in the box with (or part of) the inverter. It and the motor are water cooled. It's possible that they have separate cooling systems but we haven't figured that out yet.



So no likely charger upgrade, that is a huge set up for an 80kw EV! And that 12V battery sure is large for an Ev as well. I hope they don't use a pump for the PS that would be bad but if the car is heavy EPS may not work well.

AndyH
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Re: Under the Hood Picture

Mon Jul 12, 2010 2:43 pm

That's large?! Have you seen the size of the Dolphin in the US Electricar vehicles? :D

Just because the charger guts might be in the inverter box doesn't mean it's on the same circuit board and doesn't mean it can't/won't be upgradeable. It would be pretty silly in the 21st century to force an upgrade by replacing the entire inverter, wouldn't it? ;)
Last edited by AndyH on Mon Jul 12, 2010 2:44 pm, edited 1 time in total.

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garygid
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Re: Under the Hood Picture

Mon Jul 12, 2010 2:44 pm

I count 6 fluids, I think:

Four across the back, L to R:
1. Air Conditioning refrigerant
2. Possibly gear-lubrication oil ??
3. Brake fluid
4. Battery water

And, two in front, L to R:
5. Window Washer fluid
6. Motor & Electronics Coolant

Any better guesses?
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AndyH
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Re: Under the Hood Picture

Mon Jul 12, 2010 2:47 pm

garygid wrote:I count 6 fluids, I think:

Four across the back, L to R:
1. Air Conditioning refrigerant
2. Possibly gear-lubrication oil ??
3. Brake fluid
4. Battery water

And, two in front, L to R:
5. Window Washer fluid
6. Motor & Electronics Coolant

Any better guesses?


Gear lubes have been capable of lifetime service since 1988. The Leaf will likely only have a reduction gear unit/differential and will likely only use a couple of quarts of gear lube. There won't be a service point with a cap under the hood.

This was my best guess when we first saw under the hood.

Image

deetime7767
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Re: Under the Hood Picture

Mon Jul 12, 2010 3:23 pm

Quixotix wrote:This photo is from Motortrend. It appears that they took it at the test drive of the "production model" which Nissan held recently for the press in Japan.

Image

http://www.motortrend.com/roadtests/alternative/1006_2011_nissan_leaf_japanese_spec_drive/index.html

There seem to be 2 radiator style caps. Why 2? Do the inverter and motor have separate cooling systems?

Second, it sure looks like a lead acid battery in there. I assume that is the "accessory" battery. But why use a lead acid one?

I was thinkingthe same thing. ???
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garygid
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Re: Under the Hood Picture

Mon Jul 12, 2010 3:25 pm

I thought that we heard that the LEAF's power-assist steering was all-electric, no hydraulics?
Am I mistaken ... AGAIN? :)
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2010 Prius, now for sale
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2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
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AndyH
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Re: Under the Hood Picture

Mon Jul 12, 2010 3:43 pm

We don't know yet, Gary. We hashed this out in an earlier thread. Some electric power steering is direct and some use an electric pump to pump traditional fluid. Dunno.

In my annotated picture, the bottom cap is very much a pressure cap, though. That and the overflow tube strongly suggest coolant bottle rather than any other fluid. That's the reason for the two guesses. ;)

AndyH
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Re: Under the Hood Picture

Mon Jul 12, 2010 3:51 pm

deetime7767 wrote:
Quixotix wrote:Second, it sure looks like a lead acid battery in there. I assume that is the "accessory" battery. But why use a lead acid one?

I was thinkingthe same thing. ???


Because lead-acid is dirt cheap and reliable. There is one Euro car (a specific Porsche?) that uses a small lithium battery as a starter/accessory battery, but these are really expensive.

Check out this commercial LiFePO4 lightweight starter battery - the VPH450:

http://www.voltphreaks.com/

560A hot, 380A cold cranking
9Ah capacity
Suitable for 4-6 cylinder engine
$999.00

Whee! I'll take six! NOT! :lol:

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