Battery Vehicle Society

My thoughts about charger control are these, should I pull the charger voltage up or pull it down :? By connecting the leads to the top two connections on the pot instead of the bottom two then the charger can be pulled up to the correct (max) voltage when the opto is active instead of being pulled...

That should be fine, only problem I can see is that it might not keep up in the winter when you have to use your headlights. I use a 6 amp charger that was laying around, originally bought from Argos.

Greg

The master board plan sounds pretty comprehensive. 8) In my case I am splitting my pack into 2 packs, so it would be good to be able to read pack temp on both. I suspect that this may be the case for a number of people. Maybe room in the design for extra optional temp sensors, even if they are not i...

Hi guys, i have a couple of questions... 1. Can I charge from 40% DOD with no problems? Should be fine and lengthen battery life due to shallow discharges. I plug mine in whenever possible even if it was only a couple of miles drive. 2. Is it 'easy' to convert my charger for AGM batteies? Many than...

I have ordered Hi-power 100ah cells, I think they will fit your boards. For the master board I would suggest, among other features, a input for temp switches. A single input could handle any number of temp switches connected in parallel. Switches that tripped at 60 degrees C. would provide a safety ...

I like were you are going with this design Peter, simpler is a good direction. 8) Can't help you out on the PCB layout, wouldn't know were to start but if you get ready to have some made please put me down for 24 blank PCBs as well. I would like to try it out on my little Fiat 126, more testing can ...

I would like to suggest a couple more variables in Peter's code, I will list my changes in bold . I haven't done any programming in years and never done it professionally so there may be mistakes, but hopefully you will see were I am going with this. `Battery Management System Slave Module `Based on...

I got the impression that they were deep cycle gel-type batteries from the literatures? Those are "sealed maintance free" batteries. It is easy to think that a sealed battery is a gel cell or AGM type but it can also be a flooded battery that has been "sealed". Normally they req...

wywywywy wrote:The good thing is I can get Vauxhall GO batteries really cheap through trade-club discounts

Thanks.

Don't use those in an EV

They are starting batteries, not designed for deep cycling. You will kill those in a very short time by deep cycling them.

Greg

The pic has a wide operating voltage from 2-5.5v so covers virtually all the various types of Li-Ion chemistry. Last night I was starting to read through the Picaxe manual and it stated a operating voltage of 3-5.5v and min 4.5 volts for programming the chip. If this is the case that could be a pro...