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Now, before you rush at the poor battery with your combination wrench or socket and ratchet, a few words of advice. If you are installing a new battery, all you have to do with the old one is to take it to an authorized center for recycling. After all of this is done, it's now time to put the new battery or the old, albeit recharged, battery back into place. A nice finishing touch would be to smear special grease over the terminals to prevent future corrosion. Tesla Motors has had a spot of bad news – another Model S has caught on fire, this time not from road debris but while plugged into a Supercharger station. According to online discussions summarized below, this looks like a failure in the on-board charging equipment. According to comments on the TeslaMotorsClub forum, the Supercharger shown in the picture is a “temporary” unit. The difficulty with confirming the pack caught fire is a design detail we learned from previous Model S fires. The charging cables appear to be intact (though charred) which rules out an electrical fire in the charging station equipment. So far this is all Internet Forensics, and it’s difficult from looking at pictures what really happened. According to the Wikipedia page on the Type 2 connector, the Mennekes Type 2 plug is designed to support single phase AC, three phase AC, and DC charging at power levels up to 70 kiloWatts. When the European’s adopted the Combo Charging System they added two DC power pins – just as they’d done when the North American Combo Type 1 plug which was a normal J1772 plug with two DC power pins.
Before someone jumps on me for that statement — I’ve written up several electric car fires in the past, and consistently pointed out that we see hundreds of thousands of gas car fires per year in the US (in the millions world-wide) without major news coverage.
Another post on NRK quotes representatives from the Norwegian EV Association repeating this factoid, and suggesting that Tesla’s charging equipment is safe. Basically, it’s too early to diagnose the real problem, especially based on Internet Forensics. About the Author Latest PostsAbout David HerronDavid Herron is a writer and software engineer living in Silicon Valley. The scene is probably pretty familiar if you’ve watched a lot of spy dramas or thrillers: our hero has been captured by the Big Bad, restrained, and is helpless to resist as his captor hooks up a pair of jumper cables to a car battery.
Why Can't Your Car Battery Electrocute You?The math can get a little complicated, but the main reason that you can safely touch the positive and negative terminals of a typical car battery, and walk away unscathed, has to do with the voltage of the battery.
Most of today’s drivers have never tinkered with such a thing and they usually go to an auto service center for such problems.

Regardless of your car-related knowledge, you should have no trouble recognizing the acid-based device. If, however, you are planning a thorough recharge process, you can take the opportunity and clean the terminals with a wire brush. I have heard it is risky connecting a charger to battery while connected to car and to remove battery the BSI computer must be let go into sleep mode before disconnecting the battery, must not touch anything on car and leave car with drivers window open before letting it go to sleep, replace battery then wait a few minutes, there is then a sequence to go through before opening door, sequence includes testing of lights and such by reaching switches through open window on drivers door, failure to do this it is claimed can damage cars computers. As dutiful consumers of media, we’ve been conditioned to know that means our hero is about to be tortured, possibly to within an inch of his life, so it’s only natural to take that knowledge back into our daily lives. Traditional car batteries are capable of delivering a lot of amperage in short bursts, which is the main reason that ancient lead acid technology is still in use.
You might do that as well, but in some desperate cases, let’s say your battery goes dead in some remote location and you somehow manage to get a car battery recharger, a do-it-yourself approach could be necessary. It’s a fairly big box with two metallic connectors, one of which is most likely covered by a plastic cap.
So, after placing the battery in its place and securing it, first attach the positive cable and then the negative one.
It’s difficult to tell with one two-dimensional photo, but to me it looks like the heaviest damage is immediately over the rear wheels. Car batteries can be used as torture devices, or to kill, so car batteries are dangerous, and only a fool would mess around with them. Starter motors require a lot of amperage to run, and lead acid batteries are good at providing short, intense bursts of amperage.
If your experience with cars only implies driving and refilling the windshield liquid container, the very idea of touching the battery might send shivers down your spine. The only thing we could do was to cordon off the area and cool with foam” (original: Bilen var helt overtent da brannmannskapene kom fram. A second possibility is the forward lower part of the cabin, where the dash would have been, but with the lesser damage forward of that (including the front bumper being almost undamaged in places), I’m leaning towards the rear of the vehicle.”  A followup comment notes that area, near the rear wheels, is where the charging contactor and other charging equipment is located.
But are they really dangerous, and can a car battery actually electrocute you?Despite what would appear to be the received knowledge, this is just another one of the many fibs Hollywood tells in the service of offering a more engaging story and a bigger spectacle. However, there’s a world of difference between the coils of a starter motor and the high contact resistance of the human body.Simply put, voltage can be thought of as “pressure,” and the 12 volts of a car battery simply don’t provide enough pressure to push any significant amount of amperage through the contact resistance of your skin. While there are certain aspects of automotive electrical systems that are dangerous, and batteries themselves can also be dangerous, your car battery probably can’t actually electrocute you. That’s why you can touch both terminals of a car battery without receiving a shock, although you may feel a tingle if your hands are wet. Also, if you notice any severe leakage and corrosion signs, it would be wise to turn to a professional to get the job done.

Because that cable is connected to the car body and if you go for the positive one first and accidentally touch any metal part with the metallic tool you will short circuit the battery (not to mention causing a shower of sparks). Certainly nothing like the confession-inducing, potentially-deadly, electrical torture you may have seen in the movies or on television, though.Car Batteries Are Still DangerousYour car battery, in and of itself, may not be capable of delivering a deadly—or even noticeable—electric shock, but that doesn’t mean it isn’t dangerous. The main danger associated with car batteries is explosion, which can occur due to a phenomenon known as “gassing,” where the battery releases flammable hydrogen gas. If the hydrogen gas is ignited by a spark, the entire battery can explode, showering you with sulfuric acid. While a car battery can’t pump a dangerous amount of amperage into your body, a metal wrench has far less resistance, and will tend to grow extremely hot, and may even become welded in place, if it bridges battery positive to ground. That’s pretty much bad news all around.Some Automotive Electrical Systems Are DangerousRemember when we said that the main reason car batteries can’t electrocute you is because they’re only 12V?
There was a huge push in the early 2000s to move from 12V systems to 42V systems, which would have been much more dangerous to work with, but the switch never really materialized for a variety of reasons.
However, hybrid and electric cars often come with two different batteries: a traditional lead acid battery for starter, lighting and ignition (SLI) functions, and a much higher voltage battery or battery pack to run the electric motor or motors. These batteries often use lithium-ion or nickel metal hydride technology instead of lead acid, and they are often rated at 200 or more volts.The good news is that hybrid and electric vehicles typically don’t keep their high voltage battery packs anywhere that you’re likely to run into them on accident, and they almost always use some type of color code to warn you about high voltage wires. In most cases, high voltage wires are color coded orange, although some use blue instead, so it’s a good idea to verify what color your vehicle uses before you try to work on it.When 12 Volt Electrical Systems Actually Can Shock YouAlthough you can’t be electrocuted by simply touching the terminals of a regular car battery, due to the low voltage, you can receive a nasty shock from other components of a traditional automotive electrical system.
For instance, in ignition systems that use a cap and rotor, an ignition coil is used to provide the tremendous amount of voltage that’s required to push a spark across the air gap of a spark plug.
If you run afoul of that voltage, typically by touching a spark plug wire or coil wire with frayed insulation, while also touching ground, you will definitely feel a bite.So What about the Persistent Car Battery Torture Trope?We’ve established that a 12V battery can’t shock you on its own, while an ignition coil hooked to that battery can deliver an extremely short, potentially unpleasant shock, so it’s probably unsurprising to hear that there’s actually a kernel of truth hidden in the scene we opened with. While a villain cackling maniacally as he strikes jumper cables together, sending off a shower of sparks and causing a river of flop sweat to run down our hero’s face, is total nonsense, electrical torture itself isn’t, and that’s something that Hollywood actually does get right in some situations. For instance, if a villain starts with a car battery, which he hooks to another device, and then uses that device to torture the hero, that’s a situation that’s grounded in reality.
There’s a device known as a picana that, powered by a common 12V car battery, is capable of delivering electric shocks of very low amperage at high voltages, which, like grabbing a hold of a bad coil wire, is extremely unpleasant.

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Comments Car battery sparks when disconnecting

  1. BaTyA
    Falls (is different for each company) trash, it's that simple (non-rechargeable.
  2. RIJIY
    With a built-in current limiter where all the odd rechargeable.