CALB CA series cell performances

Chat about all things battery in here.
Need to know what type to use or size or capacity then again place your thoughts here
Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: CALB CA series cell performances

Postby Beemer » Thu Aug 02, 2012 4:14 pm

GregsGarage wrote:
Beemer wrote:The best monitor for safety and life is not voltage but temperature!

:?: Sorry, can't agree with you on this point. Temperature is important, but in most cases cell voltage readings will highlight a problem long before temperature does. For example, I couldn't find any mention of abnormal temperature readings during John's testing when the headway cell failed. Voltage readings are instant, waiting for a component to get too hot takes time depending on it's thermal mass.


Like trying to charge ones car while freezing cold? It will surely over volt, only locally heat. Then burn down.
An overcharged cell is a warmer cell. An non-bottom balanced cell that hit reverse voltage is a hot cell.

A simple circuit to say, an Elcon charger who's "off" & current limiter line is used to current limit on temperature.. Nothing else is needed to stop the charge when cold. Or something gets inordinately warm, (Could be only the weather). Nothing else because the correct charger does not allow over volting and bottom balancing does not allow any cell to hit reverse voltage. Racks of open circuits that get damaged from so much as throwing in a damp towel are not sensible.

Thermal mass also equates to AH. The only difference is the small stuff hits the fan much more quickly.
Still off topic :shock:

mattcarr
Posts: 389
Joined: Sat May 12, 2007 2:27 pm
Location: Hampshire

Re: CALB CA series cell performances

Postby mattcarr » Thu Aug 02, 2012 6:46 pm

Let me add to this - excessive heat is only generated by a cell when it is used outside of it's paramters. If you suck too high a current out of a cell then it will heat up. But if that cell is cold then the voltage will sag dramatically when cold - so you should only draw the ampage out that keeps the cell above it's minimum working voltage. If you charge a cell and let it go over it's maximum voltage then it will start to generate heat. So in my believe the voltage is the most important factor to consider when managing a cell. Keep the cells within the manufactures specified limits and it should last.

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: CALB CA series cell performances

Postby Beemer » Thu Aug 02, 2012 7:01 pm

mattcarr wrote:Let me add to this - excessive heat is only generated by a cell when it is used outside of it's paramters. If you suck too high a current out of a cell then it will heat up. But if that cell is cold then the voltage will sag dramatically when cold - so you should only draw the ampage out that keeps the cell above it's minimum working voltage. If you charge a cell and let it go over it's maximum voltage then it will start to generate heat. So in my believe the voltage is the most important factor to consider when managing a cell. Keep the cells within the manufactures specified limits and it should last.


Absolutely!
But off topic

User avatar
Kevin Sharpe
Posts: 489
Joined: Thu Jul 29, 2010 5:39 pm
Location: Bradford on Avon
Contact:

Re: CALB CA series cell performances

Postby Kevin Sharpe » Sun Mar 10, 2013 1:11 pm

Any recent updates on CALB CA cells?
Kevin Sharpe - Founder and Patron for UK registered charity Zero Carbon World. Founder and Chairman Mainpine Group. http://about.me/kevinsharpe

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: CALB CA series cell performances

Postby Beemer » Sun Mar 10, 2013 2:57 pm

Not heard any news myself yet but...

I hear Sinopoly have gone back to selling cells outside of China, via dealers.

User avatar
Kevin Sharpe
Posts: 489
Joined: Thu Jul 29, 2010 5:39 pm
Location: Bradford on Avon
Contact:

Re: CALB CA series cell performances

Postby Kevin Sharpe » Fri Mar 29, 2013 5:23 pm

Kevin Sharpe - Founder and Patron for UK registered charity Zero Carbon World. Founder and Chairman Mainpine Group. http://about.me/kevinsharpe

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: CALB CA series cell performances

Postby Beemer » Tue May 28, 2013 11:38 am



Absolutely!
The easiest and quickest for the UK. Good reports from Anne (we must pronounce his name as "Onne"). He personally specialises on electric boats. Being in the Amsterdam area with power sockets aplenty at mooring points, we can't blame him!

He has a slot on Jack Rickards EVTV these days. Here's a bit of what he does:-
http://www.youtube.com/watch?v=we2eh2Zh ... _X-Y8l_QmQ

And here's a bit where Anne's going, sexy hardware and is up to:-
http://www.youtube.com/watch?v=4AMuXitZ ... _X-Y8l_QmQ

Of course I suggest watching all the video. Some amazing stuff coming down!

For the self builder. a note about these new CALB CA cells; the 130AH appears only to exist on paper!!

User avatar
Kevin Sharpe
Posts: 489
Joined: Thu Jul 29, 2010 5:39 pm
Location: Bradford on Avon
Contact:

Re: CALB CA series cell performances

Postby Kevin Sharpe » Tue May 28, 2013 2:18 pm

Beemer wrote:The easiest and quickest for the UK. Good reports from Anne (we must pronounce his name as "Onne"). He personally specialises on electric boats. Being in the Amsterdam area with power sockets aplenty at mooring points, we can't blame him!
I hope to visit Anne on route to/from the WAVE... if anyone has any questions for new electric then let me know :)
Kevin Sharpe - Founder and Patron for UK registered charity Zero Carbon World. Founder and Chairman Mainpine Group. http://about.me/kevinsharpe

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: CALB CA series cell performances

Postby Beemer » Thu Jun 20, 2013 12:17 pm

Young, brave and wacky Anne's certainly inboard with EVTV now. He's donated a couple of interesting film slots.
http://newelectric.nl/
http://wh.newelectric.nl/

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: CALB CA series cell performances

Postby Beemer » Thu Mar 27, 2014 10:59 pm

CALB have a new player on the block. It's a small cell in size but somewhat bigger on price. The energy/volume density has set new ground.

The start is here.
http://youtu.be/gZsW-uxWje4?t=39m30s

The outcome is 60% of the volume and 80% of the weight saving of the standard CALB CA series cell. Totally super duper for say an electric motorcycle, or a drag vehicle (20C discharge rate).

Not the energy density weight of Teslas 18650 cells but will last a sight longer than any production cars cells if your system does not overcharge or over discharge them. :D


Return to “All things battery related”

Who is online

Users browsing this forum: No registered users and 8 guests