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Slideshow: High-Voltage Hybrids & EVs
8/1/2013

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In 2010, the Toyota Prius was bumped up from a max operating voltage of 500V to 650V.   (Source: Toyota)
In 2010, the Toyota Prius was bumped up from a max operating voltage of 500V to 650V.
(Source: Toyota)

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loadster
User Rank
Gold
RE: HIGH VOLTAGE EVs TO ACCOMMODATE MORE ELECTRICSL FEATURES
loadster   8/19/2013 12:28:48 PM
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So much for IEEE laureates weighing in on this one. I remember the evolution of standard architectures in cars from the 60's thru the 90's. Whether to use small electric motors, vacuum controls from the intake manifold and hydraulics for select controls. This advancement of battery technology seems to have made the masters in the automotive industry abandon longevity and accept that this generation of conveyance have programmed obsolescence with no requirement for cross platform commonaility or standardization of modules. Guess we didn't learn from the landfills and part farms how wasteful that is. As consumers, we can all wiggle our collective noses as guinea pigs until the designers gravitate to a common architecture?

loadster
User Rank
Gold
RE: HIGH VOLTAGE EVs TO ACCOMMODATE MORE ELECTRICSL FEATURES
loadster   8/19/2013 12:28:48 PM
NO RATINGS
So much for IEEE laureates weighing in on this one. I remember the evolution of standard architectures in cars from the 60's thru the 90's. Whether to use small electric motors, vacuum controls from the intake manifold and hydraulics for select controls. This advancement of battery technology seems to have made the masters in the automotive industry abandon longevity and accept that this generation of conveyance have programmed obsolescence with no requirement for cross platform commonaility or standardization of modules. Guess we didn't learn from the landfills and part farms how wasteful that is. As consumers, we can all wiggle our collective noses as guinea pigs until the designers gravitate to a common architecture?

Charles Murray
User Rank
Blogger
RE: HIGH VOLTAGE EVs TO ACCOMMODATE MORE ELECTRICSL FEATURES
Charles Murray   8/12/2013 7:17:38 PM
NO RATINGS
Excellent point about households making use of the higher voltage architectures, AandY. A few years ago, we wrote about the use of these architures for campers and household users. See link below:

http://www.designnews.com/document.asp?doc_id=224902

AnandY
User Rank
Gold
Re- Lets evolve
AnandY   8/11/2013 4:13:20 AM
NO RATINGS
The make is quite fascinating; the electrical capability not only guarantees reliability but also longer range since the load is weighed off the engine. The high voltages and the ability to earnest energy while decelerating gives it a higher edge from the fuel powered ones. It is an interesting development.

AnandY
User Rank
Gold
RE: HIGH VOLTAGE EVs TO ACCOMMODATE MORE ELECTRICSL FEATURES
AnandY   8/11/2013 3:57:07 AM
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There is no doubt that with the introduction of high-voltage electrical systems, the EVs will have the ability to have more electrical feature that will make it enjoyable by many of its users. This will go a long way in making it not only an alternative to conventional vehicle but the ideal near-must have for many households 

AnandY
User Rank
Gold
RE: 42 V
AnandY   8/8/2013 3:25:15 AM
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I agree with Charles in that the new 48 V model offers open avenues for increased compatibility of devices to the system of the electrical vehicle. The manufacturers do not have to develop new devices to align to the system requirements, a fact that is common with most 42 V electrical vehicles.

Charles Murray
User Rank
Blogger
Re: 42V
Charles Murray   8/2/2013 7:06:37 PM
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Good point, MVRS. One of the advantages of the proposed 48V systems is that they would keep a 12V network, so that suppliers wouldn't have to develop new compatible products (as they would have during the days of the proposed 42V systems). Let's hope we soon see that on our micro-hybrids.   

AREV
User Rank
Platinum
Re: DC Bus Voltage
AREV   8/2/2013 2:53:50 PM
NO RATINGS
By isolate I mean that in cases of accidents the battery is totaly disconnected from everything so the power cannot escape to start a fire or electrocute someone. Same way an air bag inflatestoday the batteries should be totally separated from the vehicle on a detedted impact. Or they flare up like palnes are experiancing.

MVRS
User Rank
Iron
42V
MVRS   8/2/2013 2:34:39 PM
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Remember the 42V push back about 15 years ago?  Replace the 12V battery with 42V and the wiring would be smaller (and thus lighter), there would be less voltage drop due to lower currents, and electric motors could be used for some things that were now belt driven on a n engine (power steering, AC, etc).  Some electronics started to be developed to support the higher bus voltage.  They ran into some issues with switches not lasting due to longer arcing when opening, too close of a margin to the 60V shock safety limit, off-state leakage current (increased), and incandescent bulb filiments durability.

Some of those problems are less of an issue now with switch mode converters and LED lighting.

MVRS
User Rank
Iron
Re: DC Bus Voltage
MVRS   8/2/2013 2:22:40 PM
NO RATINGS
Why do you say that the high voltage is not isolated from the rest of the vehicle?  I would imagine that it is.  These cars do not use 300+ volts to power the radio, headlights, etc.

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