[Oeva-list] Upgrade to NiMH & Last Call Lee Hart Battery balancer mail thread

Theoldcars at aol.com Theoldcars at aol.com
Sun Apr 29 12:51:05 PDT 2007

Do you know what you want? You need to contact Lee quickly.
About NiMH batteries. 
This applies to EVs with one enclosed battery box or with duct work  maybe 
two separate boxes.
In my shop I have a Ranger with pack out. I starting looking at  options to 
upgrade to NiMH batteries. This Balancer would be a part of the  system. I 
figured out how it could be done. I have estimated cost for a 24  battery 316 volt 
system would be around 10,000 give or take  a 1000 dollars. Maybe less if we 
get some of the  knowledgeable people involved in our EV community. The major  
components would consist of an AC unit, Ovonics batteries, A NiMH  charger 
and Lee's balancer.
Don Blazer
In a message dated 4/29/2007 12:48:12 AM Pacific Daylight Time,  
mbayazit at onebox.com writes:

Hi Don,
Is it too late to get in on this?  I had  some delays, but would like to 
get in if it's  possible.



-----Original  Message-----
From: _theoldcars at aol.the_ (mailto:theoldcars at aol.com) 
Sent: Sat,  21 Apr 2007 01:31:59 EDT
To: _ranger-ev at yahoogrouranger_ (mailto:ranger-ev at yahoogroups.com) 
Subject:  Re: [ranger-ev] Last Call Lee Hart Battery balancer mail thread

Hello  Mark

Most of the Rangers are on in use now. This balancer system would  work way 
better than the Ranger BMS. What did you do to get yours  going?

Below is an email from Lee that covers some of your questions.  This balancer 
order has taken a long time to happen. I would not count on  another anytime 


First, I want to thank you for  your interest in my Battery Balancer. 
And, to thank you for your patience  in getting this order together. It's 
taken a long time!

I have  enough orders at this point to order the Relay boards. The price 
will be  $49 for a bare board, $145 for a kit (the board and all parts), 
or $195  for an assembled and tested board. All boards will of course 
come with  full documentation.

I don't know the quantities yet for the Control  board, so the prices are 
still approximate. My guess is that it will range  from $75 for a bare 
board, to $500 maximum for a fully populated board  with BASIC Stamp and 
on-board Vicor DC/DC.

Please email me with  your order for Relay boards; how many, and what 
option (bare board, kit,  or assembled). I plan to order boards based on 
the quantities confirmed by  next Friday, April 27.

As always, please email me with any  questions!

In a message dated 4/20/2007 5:56:24 PM Pacific Daylight  Time, 
_mbayazit at onebox.mba_ (mailto:mbayazit at onebox.com)   writes:

Hi Don,
I live in California and have 3  1998 Pb-A Ranger EVs.  I spoken 
you a few times, more  than a year ago, when your  
trucks amp;n<lt;>were 
still waiting  to see which direction people were   Now you're  
Are you using one of these balancer setups in any of  your many Ranger 
EVs?&amp;nbsp;&amp;nbsp; Are any of your  five Ranger EVs going 
now?&amp;nbsp; Other interesting  
I am interested in the balancer, but was  wondering what you think the price 
of the boards/kits/of the boards/kits/<WBR>I am inte&amp;nbsp; Have you had 
commitments from people so  you can project the volume you expect, and thus 
an estimate of  cost?&amp;nbsp; I realize that would be somewhat  unlikely.
Let me know how things are going,

Mark  Bayazit

-----Original Message-----
From: __theoldcars at _theold_ (mailto:_theoldcars at aol.the) _ 
(mailto:_theoldcars at aol.the_ (mailto:theoldcars at aol.com) ) 
Sent: Thu,  19 Apr 2007 03:04:56 EDT
To: __ev at listproc._e_ (mailto:_ev at listproc.ev) @listp_ 
(mailto:_ev at listproc.ev@listp_ (mailto:ev at listproc.sjsu.edu) ) 
;__pwallace at ichips._pwallac_ (mailto:_pwallace at ichips.pwallace) @_  
(mailto:_pwallace at ichips.pwallace@_ (mailto:pwallace at ichips.intel.com) )  
;__jrab at e-m-w._jr_ (mailto:_jrab at e-m-w.com) _ 
(mailto:_jrab at e-m-w.com_ (mailto:jrab at e-m-w.com) )  
;__gary.graunke at _gary.gra_ (mailto:_gary.graunke at gary.grau) _  (mailto:_gary.graunke at gary.grau_ 
(mailto:gary.graunke at intel.com) )  
;_steveclunn@;_steveclunn@<WBR>bells_steveclunn at bellsoutsteve_ 
(mailto:steveclunn at bellsouth.net) )  ;_electrabishi@)  ;_
(mailto:_electrabishi at electr_ (mailto:electrabishi at ak.net) ) 
;__jburke1 at carolina._jburk_ (mailto:_jburke1 at carolina.jburke) _  
(mailto:_jburke1 at carolina.jburke_ (mailto:jburke1 at carolina.rr.com) )  
;_Southtownelanes@)  ;_Southtown_Southtownelanes at Southto_ 
(mailto:Southtownelanes at msn.com) )  
Cc: __leeahart at earthlink_lee_ (mailto:_leeahart at earthlink.lee) _  
(mailto:_leeahart at earthlink.lee_ (mailto:leeahart at earthlink.net) )  
;__oeva-list at oeva._oe_ (mailto:_oeva-list at oeva.oev) _ 
(mailto:_oeva-list at oeva.oev_ (mailto:oeva-list at oeva.org) )  ;_sparrow_ev@)  ;_sparrow_e
(mailto:_sparrow_ev at yahoogrosparrow_ (mailto:sparrow_ev at yahoogroups.com) )  
;_solectria_)  ;_solec)  ;
(mailto:_solectria_ev at solectria_evsol_ (mailto:solectria_ev at yahoogroups.com) 
)  ;_ranger-ev@)  ;_ranger-ev@<WBR>ya_ranger-ev at yahoogrouranger_ 
(mailto:ranger-ev at yahoogroups.com) )  
Subject: [ranger-ev] Last Call Lee Hart Battery balancer mail  thread

We have gone one month and it is time to now to place the order.  I have sent 
this on to any groups that I thought would be interested.  

Anyone wanting to review here is the link and past emails are  below.


(http://www.geocities.com/sorefeets/balancerland/) )  ) 

Lee has asked for an email describing what you want below in Green.  

I have sent this to everyone who has responded. In case I missed  anyone I 
included the EV list. I am also going to send this on to some  other list 
this balancer would really help with.

1.  Question below by Paul can we add temperature probes?

2. In a prior  email in red below Lee brought up saving manufacturing cost. 

The above  one and two going different directions. I would be for spending 
the extra  money for more options. I have little doubt in a short time we 
will be  
working with lithium batteries. Heat is a critical factor with them as  well 
as other battery technologies. The savings I am for is producing more  so 
cost is reduced. 

Please respond to all to keep everyone  informed.

Thank you

In a message dated 3/14/2007 1:11:15  PM Pacific Daylight Time, 
__paul.wallace at _paul.wal_ (mailto:_paul.wallace at paul.wall) _  
(mailto:_paul.wallace at paul.wall_ (mailto:paul.wallace at intel.com) )  writes:


The design as it stands doesn't have enough  temperature probe ports for 
NiMh. I think that we need one probe per  battery. It is probably 
possible to add a multiplexer for multiple  temperature probes and let 
the stamp select them at the same time it is  selecting the battery it is 
going to measure voltage  on.


&amp;gt; Specifically, the old control board used  an external digital 
&amp;gt; with isolated RS-232 output to  measure battery voltage and current. 
&amp;gt; cost $50-$100.  I'm experimenting with a cheaper on-board circuit to 
&amp;gt; this  (since everyone is obsessed with cost).

Yes, there's  an order in the works. I'm trying to work out the final 
details, and  figure out how many to order, and what features people 
want/need. Stay  tuned!

What would help is if interested parties send me an email  describing 
what they want;

1. Bare boards only (with schematics and  parts lists)

2. Parts kits (boards with parts, which you assemble  yourself)

3. Assembled boards (which you just need to be put into a  box)

On the software side, I don't have the time/resources to supply  more 
than a demo program (what I'm using for my own EV). You will need to  
change the program to suit your battery pack (number of batteries,  
voltage per battery), the balancing method you want to use (if different  
from mine), and other auxiliary functions (like temperature measurement,  
charger control, fan control, heater control, etc.) So, I would suggest  
that you buy your own BASIC Stamp with its development kit, so you can  
make these changes.

Time: This is a side project for me. I have a  backlog of other contracts 
ahead of this one that I need to finish first,  so delivery is probably 
going to be 2-3 months.

Note: Just saying  you want one won't make it so. Serious orders only! 
It's too expensive a  project for me to order all the parts on the CHANCE 
that you MIGHT buy it.  Once I know how many we need, then I can quote a 
price. When folks pay for  it, I place the orders.

Ring the bells that still can  ring
Forget the perfect offering
There is a crack in  everything
That's how the light gets in -- Leonard  Cohen



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