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Toyota Camry Hybrid Battery Pack Questions

96 messages,  Last post on Dec 15, 2008 at 3:44 PM

You are in the Toyota Camry Hybrid Maintenance & Repair Forum. Your Host is pf_flyer

What is this discussion about? Toyota Camry Hybrid, Hybrid Cars, Sedan


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#55 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [droid13] by midnightcowboy
Sep 07, 2006 (12:59 pm)
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Replying to: droid13 (Sep 07, 2006 12:49 pm)

Hey droid13 look at Ocean99999's original post #44. Apparently there is more too it than you think.
 
Cheers,
 
MidCow
#56 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [ocean99999] by gillesmtl
Sep 07, 2006 (8:25 pm)
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Replying to: ocean99999 (Sep 02, 2006 4:03 am)

Hopefully we can all learn from what happened sadly to you :
 
After painfully skimming through the user's manual I found this.
1- On page 10 : "If the hybrid battery becomes fully discharged and the vehicle will not start even with a jump start to the 12 volt battery, contact your Toyota dealership." This is what you did.
 
2- On page 306 (Jump starting procedure) : "During jump starting, run the engine [of the helping car] at about 2000 rpm ..." DON'T DO THAT FOR THE FIRST 2 MINUTES - This creates a risk to burn the rectifiers of the helping car ! It will also exceed the 5-ampere charging recommendation by a large margin. LEAVE THE HELPING CAR'S ENGINE STOPPED for the first 2 minutes and then you can ramp up slowly to 2000 rpm.
 
3- Page 307 : "If the first start attempt is not successful...
...Recharge the discharged battery with the jumper cables connected for several minutes and restart the hybrid system in the normal way...." This is what you ended up doing.
 
I always like to know how and why things work (yes, I am an engineer ). We already knew that the 12 volt battery normally gets its power from the the 244 volt battery. Your mishap confirms that the 12volt-to-244volt converter is bi-directional, and that, when in need, the 244 volt battery can be recharged by the 12 volt battery.
#58 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [gillesmtl] by droid13
Sep 08, 2006 (12:45 pm)
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Replying to: gillesmtl (Sep 07, 2006 8:25 pm)

The only thing that charges the traction battery is the motor/generators powered by ICE or regen braking. Letting the 12V battery charge for a few minutes allows the traction battery to determine its safe to reconnect itself to the system without concern that the 12V system will draw it down past it's safe level. It's all about protecting the traction battery and why these batteries are suppose to last 15 yrs in the car when the identical type of battery used in a laptop is ruined after 2 yrs of use.
 
If the traction battery charge falls below it's safe range, it will not reconnect to the system and it's time for a tow to the dealer for diagnostics (something is wrong!) and a direct recharge.
#59 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [droid13] by stevedebi
Sep 08, 2006 (12:48 pm)
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Replying to: droid13 (Sep 08, 2006 12:45 pm)

"It's all about protecting the traction battery and why these batteries are suppose to last 15 yrs in the car when the identical type of battery used in a laptop is ruined after 2 yrs of use."
 
Just to clarify, Toyota has never made a claim that the traction battery will last 15 years. Perhaps you mean 150K or 10 years, which is the CARB state warranty on emissions parts?
#60 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [stevedebi] by droid13
Sep 08, 2006 (1:19 pm)
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Replying to: stevedebi (Sep 08, 2006 12:48 pm)

I'm talking probable usable life, not warranties or guarantees. I guess I should have said "why these batteries should be able to last 15 yrs". From what I've heard, older Prius batteries nearing the decade mark and still going strong with little signs of giving up soon...
#61 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [droid13] by gillesmtl
Sep 08, 2006 (7:59 pm)
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Replying to: droid13 (Sep 08, 2006 12:45 pm)

The only thing that charges the traction battery is the motor/generators powered by ICE or regen braking.
 
Droid13, your statement does make sense.
 
May I ask where you got the information to assert this ? Or do you just put forward a hypothesis ?
 
I would like to be sure before I change my mind.
#62 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [gillesmtl] by droid13
Sep 08, 2006 (8:57 pm)
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Replying to: gillesmtl (Sep 08, 2006 7:59 pm)

The hybridsynergydrive web site describes the DC/DC converter among lots of different resources. The ToyotaIguide site makes mention that once the traction battery is outside it's safe range, HSD won't start and see your dealer (again, among lots of different resources). There is a dedicated port on the traction battery for charging it should something go wrong, of course that's where the manual warns you that you'll electrocute yourself if you play with it.
#63 of 96
Re: Dead battery woes in my 2007 Camry Hybrid & Toyota Service [stevedebi] by r_nash
Sep 13, 2006 (7:15 am)
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Replying to: stevedebi (Sep 08, 2006 12:48 pm)

I've read in a few articles that Toyotas goal is for the traction battery to last the life of the car - typically 15 years or 200K miles.
#64 of 96
Toyota does make changes... (I hope) by magelan
Sep 17, 2006 (10:29 am)
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My car is one week old. Going back to the subject of drained batteries if car is not put to "P". I cannot get the key out unless I press the Power button. When I press the power button the gears switch goes into "P" position. Overall it must mean that the "P" gear problem is effectively solved unless you leave your keys in the car...

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