I have to say, I am wary of The Battery Universit regarding Li ion
batteries. I have seen some incorrect information there. Maybe they are
fine WRT Prius and NiMH - but I am just sayin'...
To me their rep is not pure and unsoiled..
On Mon, Nov 17, 2014 at 11:37 AM, paul dove via EV <ev@lists.evdl.org>
wrote:
> You all need to read the link I posted.
>
> It explains how to recondition Nickle based batteries.
>
> It also explains the failure mechanism and why this works.
>
>
>
> ________________________________
> From: EVDL Administrator via EV <ev@lists.evdl.org>
> To: Electric Vehicle Discussion List <ev@lists.evdl.org>
> Sent: Monday, November 17, 2014 9:15 AM
> Subject: Re: [EVDL] Hybrid battery reconditioning
>
>
> From the webpage description, it sounds like they know what they're doing,
> though I have no way to judge whether they're using appropriate criteria
> for
> deciding which modules are defective.
>
> Alas, any time you fix a declining EV battery by replacing the worst cells
> or blocks, rather than all of them, you have no way to know what other
> cells
> or blocks might turn toes up next week, next month, or next year.
>
> I've done what they describe with lead EV batteries, replacing blocks as
> they fail. With that situation it's mostly a losing game, because once a
> couple blocks die, the rest usually aren't far behind.
>
> Coincidentally, this is a NiMH question I'm facing too. I have a 36v 10ah
> NiMH e-bike battery here that's on its last legs. I've been debating
> whether
> to (a) replace just the bum cells and see how it goes, (b) replace all the
> cells, or (c) gut the battery and try lithium cells instead. ("Tenergy"
> brand tabbed D-size cells are around $9 each plus shipping; other brands
> are
> much more expensive, if you can even find them with tabs.)
>
> I'll be interested to hear from anyone who has experience doing this with
> NiMH in EVs.
>
> David Roden - Akron, Ohio, USA
> EVDL Administrator
>
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