[BasiliskSt]

So is this a function of battery chemistry or of the energy management system being integrated with the battery?

[CTS-Vluvr]

BasiliskSt;182914 Wrote:So is this a function of battery chemistry or of the energy management system being integrated with the battery?

I would imagine this must be a function of the battery chemistry since an energy management system should be easily and more cheaply replaced than a $40k battery. I thought the batteries in these were comparable to laptop Li-Ion batteries, which if I'm not mistaken, aren't bricked if you drain them. Weird. I hope Tesla sorts this out because I want them to succeed and lead the way in this pioneering attempt at future propulsion.

[Luas]

[ReaganLogan]

Interesting

[RougeRiver]

CTS-Vluvr;182899 Wrote:

RougeRiver;182861 Wrote:Wow, those Silicon Valley dudes were all so smug about their ability to engineer in comparison to the mainline automakers. Looks like they engineered epic fail. One must expect the customer to do things wrong and have failsafes in place.

Right now, the most similar product is the Leaf. It would be interesting to see how they handle total discharge.

The Volt would have a simple solution. The on-board control could start the ICE to return the system to 30% SOC. It may, indeed, already have that solution.

I would not be surprised if all full electrics have this problem. The Volt is showing once again how much more advanced its engineering is!

It seems to be forgotten that GM has a lot of consumer feedback from real EV users that they got from the EV1. The Volt is an attempt to address the issues raised.

[CTS-Vluvr]

RougeRiver;182930 Wrote:

CTS-Vluvr;182899 Wrote:

RougeRiver;182861 Wrote:Wow, those Silicon Valley dudes were all so smug about their ability to engineer in comparison to the mainline automakers. Looks like they engineered epic fail. One must expect the customer to do things wrong and have failsafes in place.

Right now, the most similar product is the Leaf. It would be interesting to see how they handle total discharge.

The Volt would have a simple solution. The on-board control could start the ICE to return the system to 30% SOC. It may, indeed, already have that solution.

I would not be surprised if all full electrics have this problem. The Volt is showing once again how much more advanced its engineering is!

It seems to be forgotten that GM has a lot of consumer feedback from real EV users that they got from the EV1. The Volt is an attempt to address the issues raised.

Prior failure and the lessons learned from them are GM's ace in the hole.

[bluestinger66]

I thought the Volts system wouldnt even let the battery discharge to zero. For some reason the number 30% is stuck in the back of my mind.

[CTS-Vluvr]

bluestinger66;182934 Wrote:I thought the Volts system wouldnt even let the battery discharge to zero. For some reason the number 30% is stuck in the back of my mind.

That is correct, although I wonder what happens if you let it sit for a year.

[RougeRiver]

GM took a very conservative approach in order to insure battery life. I guess lithium ion batteries last longer if kept between 100% and 0%. So they partitioned the battery as follows:

30% to 80% = charge dedicated to EV mode

80% to 100% = equals an extra reserve never used in order to extend life

30% = equals the level that the battery is kept at during hybrid mode.

In hybrid mode, the charge will be drawn down to below 30% during high power demands and later restored by the ICE utilizing a generator.

It would take a long time for parasitic loads to draw the Volt down to 0% SOC.

The ICE is already capable of turning on to keep itself in shape, so those turn on events would activate the charge restoration function, if needed.

[All-Or-Nothing]

This is simply ridiculous.


Even my RC cars which use batteries of similar chemistry have LiPo cut off switches which don't allow you to drain them too low. Even with this I have chargers that can bring completely drained batteries back to life. The Zolt and Leaf should not have this problem as they both will only allow the batteries to drain to a certain point. The Zolt will automatically kick in the generator and the Leaf will simply just stop going. Sounds like these guys need to play with RC cars more.

[Dequindre]

Disposible cars defeat the purpose of buying a "green" EV.

[All-Or-Nothing]

Dequindre;182962 Wrote:Disposible cars defeat the purpose of buying a "green" EV.

Especially at Tesla prices