Paul RakoTechnical Editor Paul Rako looks at analog technology in power supplies, interface, the signal path, and life in general.


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Wednesday, December 26, 2007

Electric car crash test

Dec 26 2007 3:06PM | Permalink | Email this | Comments (14) |
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And yes, it crumples like a tin can. There is a lot more to designing a usable car then having it go 90 miles before needing an 8 hour recharge. And yes, the same people that howl that we need electric cars NOW will be the first one to sue when that very same electric car allows their loved one (or favorite pet) to die. Don’t blame me. I am just the messenger.

Now as a former auto engineer that has witnessed crash tests first hand, there are a few things that need to be pointed out. First off, crumpling is the every best thing for a crash. It means the car is absorbing energy and reducing the deceleration felt by the passengers. In this test the hood did not slice into the windshield, which is very good, but the windshield got penetrated by the concrete block, which is very bad. Having the driver door fly open is probably a failure under the safety codes but the important factor is what happened to the footwells. If they got crushed then the passengers are severely hurt. If there was some integrity kept down there then this may be a dramatic crash, but it is safer than a tidy one where everything just stops in an instant.

It is interesting that the same crowd that cheered Ralph Nader for destroying the first innovative car GM came out with are the same ones willing to give a pass to electric car people, at least until one of the opinion elite gets killed in one, that is.


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Reader Comments


at 12/26/2007 5:57:28 PM, Chris Jackson said:
Paul, so what happened to the 'footwells'? What happened to the crash test dummy? What was the crash score? Did the air bags deploy? You give no details. It is obvious for whatever reason, you don't like this car.

at 12/27/2007 5:28:56 AM, Dave said:
Like Paul said, he's just the messenger, the test was done in the UK and apparently sponsored by Top Gear, a Brit car mag. This forum won't allow urls, just go to topgear.com and search for G-Whiz, it's the first link (after the ads).

at 12/27/2007 6:27:39 AM, David M. said:
Paul should not imply that all electric vehicles are unsafe because one failed a crash test and therefore we should stop wasting our r & d dollars on developing a replacement for our gas sucking autos. There are EV models soon to be available to the public which passed the US crash testing - such as the SUT by Phoenix Motor Cars of California. The article is on their website (phoenixmotorcars.com at /news/2007/pr_070412-2.html). There always seems to be a group of naysayers that will go out of their way to find negative things to say about a new technology in hopes of preventing the new technology from making it to market or becoming a significant market share as to threaten an existing market (such as the oil industy). Alexendar Graham Bell offered to sell the telephone patent to Western Union's president but Western Union told Alexander Graham Bell that the telephone was nothing more than just a toy, a curiousity, and wouldn't amount to anything. Hmmm... when's the last time you've sent or received a telegram by Western Union?

at 12/27/2007 8:27:17 AM, tony said:
This guy obviously wants to confuse the public with false information. Is he getting paid by oil companies to say all these lies? Not all electric cars do poorly in crash tests, and the G-wiz was tested for highways speeds not for road speeds. Have you ever driven in London? You are lucky if you are moving more that 25 m.p.h.

at 12/27/2007 10:36:44 AM, Chris Jackson said:
Well lets see, the EV1 passed the crash test, so did the Toyota ECRV, and these cars are old. I think the only thing to worry about in an electric car crash test is how the battery will respond during the crash or if the fire dept sprays water on it. These are the obvious things to talk about but Paul doesn't even bring them up. Electric Car 1, Paul the Electric car basher 0.

at 12/27/2007 2:58:09 PM, TJ said:
This is not an electric car. You can't legally call that thing a car in the USA, because it doesn't pass the federal requirements, not the least of which are the crash test requirements Check out the video of the Tesla electric car crash test. It's very inpressive how well it performs. And yes, that is an electric car, which is to say it can legally be called a car because if passes federal requirements, and it's powered by batteries. Don't lump all electric cars in with this piece of trash that's not even a proper car. If you want to see a gasoline car fail a crash test, whatch the video of the Chery. Then pretend that represents all gasoline powered cars.

at 12/27/2007 3:18:25 PM, Chris P said:
Oh dear - we have a Car and Driver person. Muscle cars are the only way. Apparently he cannot get his head around the fact that fossil fuels and materials are finite resources and in many cases running out. Doesn't like that reality so he throws stones at a non-mainstream vehicle without revealing that. Please stick to something that you might be an expert in - with real facts.

at 12/27/2007 3:42:29 PM, JB said:
Chris you are a dim-wit. We cant look for more or retrieve the resources because people like you think it's more enviromentally sound to mine nickle to make huge batteries that eventually need to be replaced and discarded... do some research and see how harmfull those things are in a crash or how bad they are to dispose of. I'm all for new technology and for alternatives, but for pete's sake, use your brain and dont be a parrot speaking only what youve heard said by al gore.

at 12/27/2007 5:29:18 PM, Chris Jackson said:
JB, did you know that batteries are recyclable? Ooops dim wit me, I should have realized you didn't know based on your post. Well they are. What does Al Gore have to do with this conversation?

at 12/27/2007 6:25:16 PM, PV said:
In the past I made sensors mounted on dummies for crash tests. Paul’s observations sound more mechanical design issues which have little to do with electric against gasoline. The windshield getting penetrated by the concrete block and the crumpling of the footwells are due to too much of a car front half plastic absorption and too little of an elastic transmission of the crash energy to the dummies and the rear half of the car: not an electric issue. The swinging open of the driver door is also far from electric caused. A release of acid or other detrimental battery chemicals as being, say, more deadly compared to a discharge of liquid gasoline would be a valid electric vs. gasoline issue. The reduction of mass of an electric/hybrid motor as compared to that of a combustion engine, the increase of a battery mass as compared to that of an average gas tank, and the redistribution of those mass bodies throughout the car frame, present different, universally neither more nor less, crash survivability design challenges to electric cars.

at 12/28/2007 7:21:26 AM, John said:
I am very surprised EDN would allow such a vague article to be published on such an important topic. Clearly Paul as an ax to grind.

at 12/28/2007 7:50:40 AM, Stiggle said:
A lot of EVs seem to be based on crash tested production cars. So the important tests are how well the passenger is protected from possible battery rupture, or fire. An interesting comment above mentions a crashed car with possible trapped passengers gets sprayed by the fire department with water or maybe foam. What kind of shock protection tests will be performed?

at 12/28/2007 8:34:02 AM, Dave said:
You are right, it''s all a hoax, Paul (who has built an electric Honda Civic) and me (who has more lithium batteries, brushles controllers and electric bicycle hub motors than Al Gore has copies of Mother Jones) have conspired with Big Oil and the Big Three (really big 2.1, since mopar is almost dead) to discredit the electric car. Using my 14 year old 200Mhz SGI Indigo2 Extreme workstation, Alias Power Animator V 8.5 and Photoshop, we crafted the fake video. The rendering alone took longer than "Toy Story" Never mind that it''s posted on Top Gear''s highly secure UK website, we hacked that as well! (slaps and greets to Clive, Cisco-rooter, and Jens Bjørnstjerne). I''m sure ILM will stop playing my demo reel in their "hall of shame" now and hire me.

at 12/28/2007 12:25:45 PM, rick said:
How about the crash test against a table? www.youtube.com/watch?v=quHzOK9chx8 I do like electric cars, but they should be a little bit safe in a crash. Most are.

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