I think my Nexcell battery is going on it's way out after 2 years

what's the warranty?

 

I guess the aren't as good as has been stated. What was the warranty on it?

 

Well that's sad. Only 2 years? "IF" it IS as good as some are saying, why only 2 years?
It should be 5 years.
If you plan on keeping the car for several years, I would suggest getting NEW original type cells.
They certainly last longer than 2 years. And they cost less. And have a longer warranty.

I would usually suggest using the Prolong system, but I don't believe it was designed for those
type of cells. So not sure if it would work or not. You could call them and ask...

 

Contact jack, he’s pretty good about goodwill warranty

 

While I've never seen these symptoms in Gen3 before, they do happen in Gen2.

Basically, your voltage sensor harness and battery ECU likely have corrosion issues and are giving bad readings, which as you've explained is a sudden drop in pack charge and then quickly back to normal. The concern with this problem is that it could potentially overcharge the pack and damage it.

The solution is cleaning your ECU and voltage sensor harness and main cables of all signs of corrosion. Thankfully, Jack is always innovating and has also built a version 2 circuit for your modules, which will aggressively protect your pack from this type of damage if you have corrosion causing overcharging. It also optimizes voltage balance and operating temperature, which will significantly improve your MPG.

If you live in the Seattle area I can install the V2 circuit in your modules in just a few hours as soon as tomorrow... If not, Jack can ship you a set V2 circuits for you to install yourself, or have your mechanic do it. Or you can ship it back to Jack and he'll likely do it for free if you cover cost of shipping.

 

So you'll have supposedly new cells with older cells? Can you say "wack a mole"????

2 years ago I was seeing new cells for $2-2500.

And if you still don't tell the car what type of batteries it's charging, you'll still have issues....
At least you were able to get something.....

 

I don't know Jack or anything other than what I've read here about Nexcell but what you are describing about Jack stepping up to the plate says a lot about him and his company. This is really great PR and smart business. Please post how this works out for you. Good luck.

 

There's no wack a mole going on here. All the cells in the pack will be tested and if the car was driven for too long with this malfunction and a cell or two are damaged due to overcharging they will be replaced with a well matched cell and if a greater number than that were damaged then the whole pack will be replaced, often at the Project Lithium's expense, which is manageable thus far because it's a relatively rare issue related to the car battery ECU malfunctioning, not the pack.

The warranty clearly states that if you're gonna install the pack with corroded wiring, corroded ECU or busbars you run the risk of voiding the warranty. Fortunately, Jack knows customer service matters and he'll do all he can short of going broke to help people with this.

Also, when it comes to repairability, this project was crowdsourced from Dr. Prius app funds and as such the DIY value in terms of repairability is a high priorirty. Unlike Toyota, these modules aren't sealed and you can take the screws out and remove the top and replace any component within each module, which makes a huge difference in terms of maximizing the lifespan.

Of course if you haven't driven one of these packs and aren't aware of how much better these packs perform compared to OEM by every measure you probably won't realize how much better a pack is that stays perfectly balanced, as well as maintains optimum performance temperature of the cells thanks to the V2 circuit upgrade that also protects the pack from these type of battery ECU malfunctions.

 

Without the original customers there won't be the new V2 and our success story, that's why we are grateful and really never enforce the 2 years warranty.

Beside, it is a rare opportunity to study the old beaten up batteries and see how we can improve upon, like the recent 200K miles pack that letting us peak into the future and brainstorm ideas for future release. priceless!