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My Hymotion battery is dead. RIP. Almost 3 years of service.

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Old 07-05-2011, 08:12 PM   #1
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Unhappy My Hymotion battery is dead. RIP. Almost 3 years of service.

After almost 3 years of service my Hymotion battery has died.

Last week after starting the car it gave me 3 flashes on the LED. After trying to restart the car the Hymotion battery would not turn on and give me any kind of light on the LED.

David Roper had the same issue and he said he was told it had something to do with the DC to DC converter locking up. The easy solution is to swap the battery.

The good news is that the battery is still under warranty. But just barley. My warranty expires in the middle of August 2011. So I guess I'm lucky that it failed now instead of later. I don't know how much this would be to fix if out of warranty but I'll try to ask when I get it replaced.

Here comes the bad news. I will have it serviced Friday the 22nd at Smart Motors Toyota in Madison Wisconsin. This means I will not compete in the MPG challenge. I guess it will be good news for everyone in the PHEV category as now I will not be able to kick your butts. Most likely I would have had my ass handed to me this year anyway.

If the replacement goes OK I will still be able to be in the showcase which I hope to make up for the MPG challenge and kick your butts there.


I will be keeping separate stats on the replacement battery so I will provide some of this packs final stats.

Best Tank
3536 Miles
314 MPG
115.43 MPGe

Total PHEV miles - 23569
Gas used - 160.34
Gas cost - $437.11
Total kWh Used - 3372.5
Total kWh cost @$0.08 - $269.8
Avg. Wh per mile - 143.09
Avg MPG - 147.0
Avg MPGe - 90.4
Avg CPM - $0.03

Estimated charge/discharge cycles - ~700

Last full charge in Wh - 4634.3
Still about 23-25 miles all electric

2010 full charge - 4683.4
About 24.4 miles all electric

2009 full charge - 4734.2
About 26.6 miles all electric

2008 Full charge - 5295.7
About 25-30 miles all electric


Some extra stats pulled from the battery.
Full cycle counter - 378
.5 cycle counter - 166
.2 cycle counter - 251

If you add all those up I was not too far off from my estimated cycles.

I kind of wish I could keep the batteries because I would like to see how long they would last. Lithium is still so new we need data on how long they will last. I just hope the replacement pack is as good as or better than what I my current pack was capable of.
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2006 Prius Barcelona Red Package #7. Picked up 2006/01/02
Converted to Plug-In on 2008/08/12 with Hymotion L5

***Hybridfest 2007 & 2008 Peoples Choice Award ***

***Hybridfest 2009 Peoples Choice Best of Show Award ***

For a list of my mods visit http://www.jaygroh.com




Last edited by TheForce; 07-26-2011 at 10:05 PM.
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Old 07-05-2011, 08:26 PM   #2
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

Very impressive stats. How fortunate you were to beat the warranty deadline. Keep us informed.
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Old 07-05-2011, 09:30 PM   #3
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

700 cycles are low for LiFe Lithium. Did they say a cell or pack was defective or is it normal wear and tear?
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Old 07-05-2011, 09:32 PM   #4
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

The 3 flashes according to David Roper is a DC to DC converter issue not a battery issue.
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Old 07-05-2011, 09:38 PM   #5
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

I thought they are replacing the battery pack. Perhaps the DC to DC converter is pack together with the battery pack and they are replacing both?
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Old 07-05-2011, 09:41 PM   #6
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

The Hymotion battery system has everything in one box. They are replacing the whole thing.
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Old 07-05-2011, 09:56 PM   #7
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

Gotcha!
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Old 07-05-2011, 10:38 PM   #8
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

Quote:
Originally Posted by TheForce View Post
The Hymotion battery system has everything in one box. They are replacing the whole thing.
Interesting... that is both good/bad, I guess. I'd think that it'd be much cheaper for them to replace only the bad parts than the whole thing.

I wonder if you'll get a new battery or a used one. If it's a new one, score! If it's a used one...hmm, I'd wonder about how much usage it got and how it was treated before it got to you...
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Old 07-05-2011, 11:27 PM   #9
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

Jay,

I am truly feel your pain, as my 2000 Honda Insight traction pack is shot - dead.

A useful tangent for your Insight - consider TheBetterBattery > Hybrid-Battery-Repair

It's about 25% more powerful than the OEM Honda traction pack AND it runs 5F cooler - a BIG DEAL down in Texas!

I'm kind of obsessed on what's good/bad for traction packs...with your Prius, a mix of NiMH and lithium packs complicates it.

Last edited by Chuck.; 07-06-2011 at 12:08 AM.
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Old 07-06-2011, 12:06 AM   #10
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Default Re: My Hymotion battery is dead. RIP. Almost 3 years of service.

Sorry to hear that but keep us posted on the replacement cost and the replacement battery.
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Posted By For Type Date
Prius PHEV Plug-In Modifications on PriusChat Forums | BoardReader This thread Refback 12-16-2011 08:14 PM
Hymotion - online discussion summary | BoardReader This thread Refback 07-20-2011 04:23 PM
Prius Replacement Battery Pack This thread Refback 07-12-2011 02:42 PM
My Hymotion battery is dead. RIP. Almost 3 years of service. - PriusChat Forums This thread Refback 07-05-2011 09:06 PM

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