Re: [EVDL] Question about charging BB600 NiCads

[EVDL Administrator via EV]

The listserver stripped off Rod Hower's PDF attachment - the Marathon 
Aircraft Nickel Cadmium Battery Maintenance Manual - but you can find it in 
the EVDL Library:

http://evdl.org/docs/marathon_nicad_manual.pdf

David Roden, EVDL moderator & general lackey

To reach me, don't reply to this message; I won't get it.  Use my 
offlist address here : http://evdl.org/help/index.html#supt

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
 Those who make peaceful revolution impossible will make violent 
 revolution inevitable.  

   -- John F Kennedy 
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 

___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)

Re: [EVDL] Question about charging BB600 NiCads

[Rod Hower via EV]

 

On Wednesday, November 25, 2020, 12:54:29 PM EST, Peter VanDerWal via EV 
 wrote:  
 
 I have some BB600 batteries that I bought years ago and never used so I'm 
thinking of using them for an off-grid EV charging station (more in a future 
post)
I used to have a copy of the maintenance manual for them, but I can't find it. 
Anyway, I have some notes that Saft recommended to use a constant current at 
their C/5 rate until they reach 1.6VPC (about 5 hours if fully discharged) and 
then reduce charge current to C/50, with no voltage limit, and continue for a 
time period equal to the bulk charging phase.
Since these batteries are rated at 34AH, that would be approx 6.8A during bulk 
charging and 0.68 for the finishing charge.

I've seen some old posts on here that say, to reduce water consuption, limit 
the voltage in the first stage to 1.4-1.45VPC and just measure current out/in 
and return 100% of the amp hours during bulk bulk/taper charging stage and then 
an additional 10% during the finishing charge.

Either way you return 110% of the amp hours discharged.

Since this is going to be a solar charger I can't guarantee constant 
voltage/current, so I'm thinking I'll just go with best effort, measure AH 
removed and return 100% AH during the bulk charging phase and then an 
additional 10% during the finish stage. I'll keep track of estimated SoC so if 
I can't return 110% on a given day I can make up for it later, perhaps do an 
addition 10% "equalization" charge periodically.

For those that have used Saft NiCads, does this sound like a good plan or do 
you have any suggestions for a better algorithm? 

Thanks, Pete.
-- next part --
An HTML attachment was scrubbed...
URL: 

___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)

  
-- next part --
An HTML attachment was scrubbed...
URL: 

-- next part --
A non-text attachment was scrubbed...
Name: MarathonManual.pdf
Type: application/pdf
Size: 773779 bytes
Desc: not available
URL: 

___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)

Re: [EVDL] Question about charging BB600 NiCads

[Peter VanDerWal via EV]

Yup, that's it.
Thanks!

November 25, 2020 12:32 PM, "John Lussmyer via EV"  wrote:

> On Wed Nov 25 09:54:23 PST 2020 ev@lists.evdl.org said:
> 
>> I have some BB600 batteries that I bought years ago and never used so I'm 
>> thinking of using them
>> for an off-grid EV charging station (more in a future post)
>> I used to have a copy of the maintenance manual for them, but I can't find 
>> it.
> 
> This is probably the one you had: https://casadelgato.com/work/NicadManual.pdf
> 
> Remember to NOT add water until they are charged! They may look empty, but 
> the water level rises
> during charge.
> 
> --
> 
> Tigers prowl and Dragons soar in my dreams...
> ___
> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> ARCHIVE: http://www.evdl.org/archive/index.html
> INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
> Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)

[EVDL] Question about charging BB600 NiCads

[John Lussmyer via EV]

On Wed Nov 25 09:54:23 PST 2020 ev@lists.evdl.org said:
>I have some BB600 batteries that I bought years ago and never used so I'm 
>thinking of using them for an off-grid EV charging station (more in a future 
>post)
>I used to have a copy of the maintenance manual for them, but I can't find it.

This is probably the one you had:  https://casadelgato.com/work/NicadManual.pdf

Remember to NOT add water until they are charged!  They may look empty, but the 
water level rises during charge.

--

Tigers prowl and Dragons soar in my dreams...
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)

[EVDL] Question about charging BB600 NiCads

[Peter VanDerWal via EV]

I have some BB600 batteries that I bought years ago and never used so I'm 
thinking of using them for an off-grid EV charging station (more in a future 
post)
I used to have a copy of the maintenance manual for them, but I can't find it. 
Anyway, I have some notes that Saft recommended to use a constant current at 
their C/5 rate until they reach 1.6VPC (about 5 hours if fully discharged) and 
then reduce charge current to C/50, with no voltage limit, and continue for a 
time period equal to the bulk charging phase.
Since these batteries are rated at 34AH, that would be approx 6.8A during bulk 
charging and 0.68 for the finishing charge.

I've seen some old posts on here that say, to reduce water consuption, limit 
the voltage in the first stage to 1.4-1.45VPC and just measure current out/in 
and return 100% of the amp hours during bulk bulk/taper charging stage and then 
an additional 10% during the finishing charge.

Either way you return 110% of the amp hours discharged.

Since this is going to be a solar charger I can't guarantee constant 
voltage/current, so I'm thinking I'll just go with best effort, measure AH 
removed and return 100% AH during the bulk charging phase and then an 
additional 10% during the finish stage. I'll keep track of estimated SoC so if 
I can't return 110% on a given day I can make up for it later, perhaps do an 
addition 10% "equalization" charge periodically.

For those that have used Saft NiCads, does this sound like a good plan or do 
you have any suggestions for a better algorithm? 

Thanks, Pete.
-- next part --
An HTML attachment was scrubbed...
URL: 

___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)