Nissan leaf battery

[thinfourth2]

Okay we all know the Nissan leaf is really really st and it has a top speed of 3mph and needs to be recharged for 27 hours and only has a range of 1 mile BUT



But why the hell does it have an 12v lead acid battery under the bonnet?

[GarryA]

Perhaps to start the engine thats to the left of it.

[thinfourth2]

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

[bertelli_1]

Because the radio won't work off a 200 volt supply?

[HellDiver]

thinfourth2 said:

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

It's you that's clueless. Of course it's to start the engine.

[JonnyVTEC]

Central locking and alarm amongst many reasons. When parked up the HV battery contactor will be open so it wouldn't be able to use the DC DC converter to power the 12v systems. Switchgear for example will be 12v to use existing parts and for safety!

[odyssey2200]

HellDiver said:

thinfourth2 said:

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

It's you that's clueless. Of course it's to start the engine.

I thought that Leaf was pure EV, therefore no engine?

[Mr Gear]

JonnyVTEC said:

Central locking and alarm amongst many reasons. When parked up the HV battery contactor will be open so it wouldn't be able to use the DC DC converter to power the 12v systems. Switchgear for example will be 12v to use existing parts and for safety!

Quite right.

HellDiver said:

It's you that's clueless. Of course it's to start the engine.

Quite wrong. Amazingly wrong, in fact.

[thinfourth2]

HellDiver said:

thinfourth2 said:

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

It's you that's clueless. Of course it's to start the engine.

And people wander why the public sector gets a bad rap


Its an electric car you mong

[vz-r_dave]

thinfourth2 said:

HellDiver said:

thinfourth2 said:

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

It's you that's clueless. Of course it's to start the engine.

And people wander why the public sector gets a bad rap


Its an electric car you mong

Only a mong would ask this kind of question, stop wasting webspace.

[GarryA]

How do you switch the motor on then? Surely the 12v battery is for that task?

[eldar]

thinfourth2 said:

HellDiver said:

thinfourth2 said:

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

It's you that's clueless. Of course it's to start the engine.

And people wander why the public sector gets a bad rap


Its an electric car you mong

Why has it a radiator cap?

[GarryA]

eldar said:

thinfourth2 said:

HellDiver said:

thinfourth2 said:

GarryA said:

Perhaps to start the engine thats to the left of it.

You really aren't following the evolution of modern cars are you

It's you that's clueless. Of course it's to start the engine.

And people wander why the public sector gets a bad rap


Its an electric car you mong

Why has it a radiator cap?[/quote

Electric cars need cooling too, think heat exchanger also for cabin temp

[HellDiver]

If it's all electric, why has it got what clearly looks like an engine? And a battery to start the engine? Makes no sense.

[Superhoop]

£28,350

I know new technology is expensive, but bloody hell, £28,350 for something the size of a fiesta, that can be had for about 10k

[Perra]

HellDiver said:

If it's all electric, why has it got what clearly looks like an engine? And a battery to start the engine? Makes no sense.

That's probably the motor controller.

The 12V battery is just for normal stuff on the car that need to be powered on a 12V or stepped down to a 5V source. Having a DC-DC converter that steps down from 200V to 12V will be expensive, you'll need much higher powered silicon, so that drives up cost. So it's all about whacking in a cheap lead acid battery.

To be fair the low power side of the motor controller will most likely be powered by that too.

[CinqAbarth]

HellDiver said:

If it's all electric, why has it got what clearly looks like an engine? And a battery to start the engine? Makes no sense.

Electric motor which is encased to look like a petrol engine is for familiarity, people feel comfortable with what they expect to see.

The standard car battery is to power the legacy systems.

My Prius also has a standard 12v battery, which powers up the computers, audio, central locking, lights etc.

Bloody annoying if you flatten it, as you can't start the car, even if the hybrid battery is fully charged.

[thinfourth2]

Superhoop said:

£28,350

I know new technology is expensive, but bloody hell, £28,350 for something the size of a fiesta, that can be had for about 10k

Which is the only reason i won't be getting one

Make it under 10K and the smaller then a fiesta and i would buy one tomorrow

[JonnyVTEC]

But then it be a larger car that's much cheaper to run... The EV phase needs alternative cars. The first mass produced one cannot be expected to supersede a typical car on all attributes!

They can't sell for 10k that's probably the material cost for the battery alone!