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70 Posts
Discussion Starter #1
Re: Ni-MH cells and Chevron (Re: EV digest 7078)

Ah ha!
http://www.batterypower.com.au/nimh.htm
This was one of the sites I found, but lost when my bookmarks were
deleted in a web browser update.
All I could remember was the website and prices of the local electronics
franchise, not the best solution, and not the most economical.

Unfortunately, "Our website will be closed till June 18th 2007 while we
carry out maintenance work."
And is still closed, cannot contact.

About those Tenergy cells, if the D cell is apparently crap, I wonder if
it is a chemistry thing, or will other sizes be fine.
Something I might find out for myself.
And yes, I will post the results when I finish the project.

Cheers all,
James Drysdale.



Dmitri wrote:
> Unfortunately, I have tried that Tenergy D cell, and it is crap.
>
> http://www.batterypower.com.au/nimh.htm Here, btw, is a site I have
> found some time ago that might be of use for you.
>
>
> ----- Original Message ----- From: "Joseph Lado" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, July 29, 2007 11:30 AM
> Subject: Re: EV digest 7078
>
>
>> James,
>>
>> The Ni-MH issue is only with the large formate batteries. You might
>> look harder on the Internet for less expensive Ni-MH batteries. It
>> seems Toyota has gotten around the restriction by increasing the
>> number of power cells that they are using currently in the Prius to
>> power their next generation of plug in Priuses. The prices of the
>> market cells have come down a lot. You might look into powering your
>> bike with AA Ni-MH cells or D cells. You could probably pick them up
>> in AU saving your self the shipping costs.
>>
>> Try Tenergy sold at All-Battery on the Internet.
>>
>> https://www.all-battery.com/index.asp?PageAction=VIEWCATS&Category=355
>>
>> Tenergy has a tabbed D cell battery that costs 7.95 and is rated at
>> 1.2 volt at 10 Ah. To get the 36v 40Ah you want should only cost you
>> around 950 dollars. They may give you a break on price if you tell
>> them you are buying 120 batteries. I believe you can get them even
>> cheaper if they don't have tabs to weld them together into one pack.
>> Also try looking up a company called CTX. They have a D cell that is
>> rated at 13.5 Ah. It costs more but in may reduce the size of your pack.
>>
>> Keep us posted on your project I want to see the end results.
>>
>> Joseph Lado
>>
>>
>
 

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Registered
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70 Posts
Discussion Starter #2
Re: Ni-MH cells and Chevron (Re: EV digest 7078)

It's a "chemistry thing." Different brands, different quality. There are
plenty of ready NiMH packs for e-bikes that you can buy. Example:
http://www.poweridestore.com/NiMH-Battery-Packs/36V-13Ah-NiMH-Battery-Pack 3
of these would cost you $1000. This would work.

----- Original Message -----
From: "James Drysdale" <[email protected]>
To: <[email protected]>
Sent: Sunday, July 29, 2007 1:26 PM
Subject: Re: Ni-MH cells and Chevron (Re: EV digest 7078)


> Ah ha!
> http://www.batterypower.com.au/nimh.htm
> This was one of the sites I found, but lost when my bookmarks were
> deleted in a web browser update.
> All I could remember was the website and prices of the local electronics
> franchise, not the best solution, and not the most economical.
>
> Unfortunately, "Our website will be closed till June 18th 2007 while we
> carry out maintenance work."
> And is still closed, cannot contact.
>
> About those Tenergy cells, if the D cell is apparently crap, I wonder if
> it is a chemistry thing, or will other sizes be fine.
> Something I might find out for myself.
> And yes, I will post the results when I finish the project.
>
> Cheers all,
> James Drysdale.
>
>
>
> Dmitri wrote:
>> Unfortunately, I have tried that Tenergy D cell, and it is crap.
>>
>> http://www.batterypower.com.au/nimh.htm Here, btw, is a site I have
>> found some time ago that might be of use for you.
>>
>>
>> ----- Original Message ----- From: "Joseph Lado" <[email protected]>
>> To: <[email protected]>
>> Sent: Sunday, July 29, 2007 11:30 AM
>> Subject: Re: EV digest 7078
>>
>>
>>> James,
>>>
>>> The Ni-MH issue is only with the large formate batteries. You might
>>> look harder on the Internet for less expensive Ni-MH batteries. It
>>> seems Toyota has gotten around the restriction by increasing the
>>> number of power cells that they are using currently in the Prius to
>>> power their next generation of plug in Priuses. The prices of the
>>> market cells have come down a lot. You might look into powering your
>>> bike with AA Ni-MH cells or D cells. You could probably pick them up
>>> in AU saving your self the shipping costs.
>>>
>>> Try Tenergy sold at All-Battery on the Internet.
>>>
>>> https://www.all-battery.com/index.asp?PageAction=VIEWCATS&Category=355
>>>
>>> Tenergy has a tabbed D cell battery that costs 7.95 and is rated at
>>> 1.2 volt at 10 Ah. To get the 36v 40Ah you want should only cost you
>>> around 950 dollars. They may give you a break on price if you tell
>>> them you are buying 120 batteries. I believe you can get them even
>>> cheaper if they don't have tabs to weld them together into one pack.
>>> Also try looking up a company called CTX. They have a D cell that is
>>> rated at 13.5 Ah. It costs more but in may reduce the size of your pack.
>>>
>>> Keep us posted on your project I want to see the end results.
>>>
>>> Joseph Lado
>>>
>>>
>>
>
 

·
Registered
Joined
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70 Posts
Discussion Starter #3
Re: Ni-MH cells and Chevron (Re: EV digest 7078)

For NiMH bike batteries, check your local Toyota dealer. They sometimes
have batteries taken out of Priuses due to a seal leakage problem, but no
real problem with capacity or battery performance failure. You can take
these apart to get the individual cell packs. I am not sure how to handle
the BMS issues. I am supposed to get two of these batteries soon, so I
don't have the hands on experience yet. George


On Sun, 29 Jul 2007 16:28:56 -0400, Dmitri wrote
> It's a "chemistry thing." Different brands, different quality. There
> are plenty of ready NiMH packs for e-bikes that you can buy.
> Example: http://www.poweridestore.com/NiMH-Battery-Packs/36V-13Ah-
> NiMH-Battery-Pack 3 of these would cost you $1000. This would work.
>
> ----- Original Message -----
> From: "James Drysdale" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, July 29, 2007 1:26 PM
> Subject: Re: Ni-MH cells and Chevron (Re: EV digest 7078)
>
> > Ah ha!
> > http://www.batterypower.com.au/nimh.htm
> > This was one of the sites I found, but lost when my bookmarks were
> > deleted in a web browser update.
> > All I could remember was the website and prices of the local electronics
> > franchise, not the best solution, and not the most economical.
> >
> > Unfortunately, "Our website will be closed till June 18th 2007 while we
> > carry out maintenance work."
> > And is still closed, cannot contact.
> >
> > About those Tenergy cells, if the D cell is apparently crap, I wonder if
> > it is a chemistry thing, or will other sizes be fine.
> > Something I might find out for myself.
> > And yes, I will post the results when I finish the project.
> >
> > Cheers all,
> > James Drysdale.
> >
> >
> >
> > Dmitri wrote:
> >> Unfortunately, I have tried that Tenergy D cell, and it is crap.
> >>
> >> http://www.batterypower.com.au/nimh.htm Here, btw, is a site I have
> >> found some time ago that might be of use for you.
> >>
> >>
> >> ----- Original Message ----- From: "Joseph Lado" <[email protected]>
> >> To: <[email protected]>
> >> Sent: Sunday, July 29, 2007 11:30 AM
> >> Subject: Re: EV digest 7078
> >>
> >>
> >>> James,
> >>>
> >>> The Ni-MH issue is only with the large formate batteries. You might
> >>> look harder on the Internet for less expensive Ni-MH batteries. It
> >>> seems Toyota has gotten around the restriction by increasing the
> >>> number of power cells that they are using currently in the Prius to
> >>> power their next generation of plug in Priuses. The prices of the
> >>> market cells have come down a lot. You might look into powering your
> >>> bike with AA Ni-MH cells or D cells. You could probably pick them up
> >>> in AU saving your self the shipping costs.
> >>>
> >>> Try Tenergy sold at All-Battery on the Internet.
> >>>
> >>> https://www.all-battery.com/index.asp?PageAction=VIEWCATS&Category=355
> >>>
> >>> Tenergy has a tabbed D cell battery that costs 7.95 and is rated at
> >>> 1.2 volt at 10 Ah. To get the 36v 40Ah you want should only cost you
> >>> around 950 dollars. They may give you a break on price if you tell
> >>> them you are buying 120 batteries. I believe you can get them even
> >>> cheaper if they don't have tabs to weld them together into one pack.
> >>> Also try looking up a company called CTX. They have a D cell that is
> >>> rated at 13.5 Ah. It costs more but in may reduce the size of your
pack.
> >>>
> >>> Keep us posted on your project I want to see the end results.
> >>>
> >>> Joseph Lado
> >>>
> >>>
> >>
> >
 

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Registered
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70 Posts
Discussion Starter #4
Re: Ni-MH cells and Chevron (Re: EV digest 7078)

> Unfortunately, I have tried that Tenergy D cell, and it is crap.

I bought a bunch of Tenergy AA cells to make a NiMh battery for a friend's mobility scooter. The 2600mAh cells tested at about 1900. It will be interesting to see how they hold up.

I emailed the factory and their online store and got no response.

Bill
 
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