Hybrid 12v battery jumping - Page 6 - Toyota Nation Forum : Toyota Car and Truck Forums
Camry Hybrid Discussion area for the Toyota Camry Hybrid. Topics of discussion range from fuel economy, safety, modifications, performance all involving Americas favorite family car, the Toyota Camry.

 
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post #76 of 240 Old 12-01-2012, 10:01 AM
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I was on a trip and my 2001 Buick LeSabre sat for 41 days without running. Started on first turn of the key.

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post #77 of 240 Old 12-01-2012, 10:07 AM
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Originally Posted by camry hybrid driver View Post
I was on a trip and my 2001 Buick LeSabre sat for 41 days without running. Started on first turn of the key.
There is also a much larger capacity 12v battery in the Buick as compared to the 12v in the TCH.
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post #78 of 240 Old 12-01-2012, 12:26 PM
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Make sure when you power off your Camry, look at the clock on the dash and make sure it's black. (no visible numbers)

If you going to leave the car in a garage I would buy a microprocessor controlled, charger that includes the low 2 amp charge rate. The charger should maintain the battery at 12 volts with no problem. The Schumacher charger includes two higher amp selections plus auto trickle. I'm not sure if wally stocks this one below.

I like the SC600A a low priced ($31) microprocessor controlled charger.

Open www.amazon.com/ and put this in the search_Schumacher Battery Charger
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post #79 of 240 Old 12-01-2012, 02:42 PM
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Originally Posted by camry hybrid driver View Post
I was on a trip and my 2001 Buick LeSabre sat for 41 days without running. Started on first turn of the key.
Does it have a Smart Key like the Camry? The Smart Key system stays powered up all the time waiting for you to come back and touch the handle.

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post #80 of 240 Old 12-01-2012, 02:46 PM
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Originally Posted by firepa63 View Post
About the only thing would be to disconnect the 12v battery or put a good quality trickle charger on it. The 12v has a rather small capacity and would probably be depleted over the 4 month period.
Toyota used to use Panasonic NiMH batteries, and now I believe make their own under license from Panasonic. The self discharge of these batteries varies quite a bit by temperature. High temperature makes them discharge faster. See page 16 of this Technical Manual. The good news is that they seem to lose charge rapidly in the first few weeks and flatten out after that.

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post #81 of 240 Old 12-01-2012, 03:24 PM
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Does it have a Smart Key like the Camry? The Smart Key system stays powered up all the time waiting for you to come back and touch the handle.
No it didn't. I was just mentioning it because I was happy to see that it wasn't dead after that long.

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post #82 of 240 Old 12-01-2012, 03:26 PM
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Originally Posted by firepa63 View Post
There is also a much larger capacity 12v battery in the Buick as compared to the 12v in the TCH.
You are of course correct.

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post #83 of 240 Old 01-27-2013, 11:48 AM
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Can TCH be jump started via cigarette lighter?

Using one of those cheap 12V jump starters that plug into the Cigarette Ligter adapter?

Has anyone tried doing this?

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post #84 of 240 Old 01-27-2013, 12:18 PM
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Would be hard to tell without a wiring diagram. However if the cigarette lighter stays live even when the car is off then you probably can. If the starting system shuts it off then it wouldn't work. Current would be limited to the fuse that supplies the cigarette lighter, but it should be a reasonable size.

The basic issue would be whether or not the supply to the cigarette lighter is controlled by a relay. If you have to power the relay to supply the circuit and the battery is dead, then you are in a no go situation. Kind of like trying to pick yourself up with your bootstraps.

If I recall correctly I believe my GPS which is powered by the cig lighter goes off when I shut the car off. That suggests the supply is relay controlled and off when the car is off.

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Last edited by Ron AKA; 01-27-2013 at 12:20 PM.
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post #85 of 240 Old 01-27-2013, 02:11 PM
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The 12V auxiliary outlets on the 2012 TCH (cigarette lighter, what's a cigarette lighter?) are rated at "120 Watts" each. However, the one in the dash is fused at 15A, and the one in the center console (on the XLE model) is fused at 20A, so i suspect the "120 Watt" rating is a soft one. (I'm a ham radio op -- it's one of the first things I checked.)

However, I believe both outlets lose power when the car is turned off, so they most likely could not be used to start the car. (I say "most likely", since I'm not sure what else is on that side of the relay and what would happen if you tried back-feeding power to it. Indeed, it might possibly make some components quite confused.)

I use a lot of 12 V 7 amp-hr gel-cell batteries for my computer UPSes here, and I always have a few extras laying around. I think I'm going to throw one in the trunk with a bit of 14 ga stranded wire the next time I head off on a trip. I bet it would work nicely for jump-starting the TCH, and if nothing else, it would be cheap insurance.
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post #86 of 240 Old 01-27-2013, 07:07 PM
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I've not see any of these jump starters before. So, the connection is from the battery of the other car (or booster) to the lighter of the TCH?

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post #87 of 240 Old 01-27-2013, 07:16 PM
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it takes a lot of amps to start your car, usually over 100 amps and on a cold day maybe 150 - 200. unless the battery is just a little bit low, 15 or 20 amps through the cigarrette lighter isn't likely going to cut it.

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post #88 of 240 Old 01-27-2013, 07:22 PM
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Originally Posted by AQ-OC View Post
I've not see any of these jump starters before. So, the connection is from the battery of the other car (or booster) to the lighter of the TCH?
Either that or the battery plugs directly into the lighter socket. Both varieties are on the market.
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post #89 of 240 Old 01-27-2013, 07:32 PM
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I've never used one of these things, but on a conventional car, I think the idea is to plug a smaller battery into the cigarette lighter for about 20-30 minutes and allow it to trickle charge your car battery. The smaller battery is a portable one -- much smaller than what you would encounter in a car. I don't think you leave it connected when you finally get around to "turning the key"; it's purpose is only to partially recharge the dead battery in your car.

That said, on a hybrid, such an arrangement might even theoretically be able to start the car directly if the cigarette plug were always live, since the starting current is going to be relatively low. (Perhaps the most demanding thing on startup is the accumulator pump -- does anyone know if it is driven off the 12V battery or the traction battery?) However, the TCH plug is not always live, and I would advise against connecting a voltage source to it.

Last edited by restamp; 01-27-2013 at 07:42 PM.
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post #90 of 240 Old 01-27-2013, 07:55 PM
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Quote:
Originally Posted by nitronate33 View Post
it takes a lot of amps to start your car, usually over 100 amps and on a cold day maybe 150 - 200. unless the battery is just a little bit low, 15 or 20 amps through the cigarrette lighter isn't likely going to cut it.
Not on a hybrid. The 12 volt battery on a hybrid just powers up the computers and accessories. And it only has to do it for a few seconds until the car "starts". The power to turn the gas engine over comes from the 245 volt hybrid battery. If that high voltage battery is drained, you are dead in the water until you get a high voltage charge/boost from a Toyota dealer.

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