AEVA Forums

I'd rather see the $$ invested in establishing a lithium processing plant and cell manufacture here in Australia first. Then a flow on subsidy for Australian EV manufacturers that use the Australian produced cells. They say they want to get people back to work and create jobs, wouldn't this move Aus...

Thanks for the offer Paul, but the BMS control boxes we make are designed around the functions of the Junsi cell log and its alarm feature. Looks like I'll be redesigning the whole set up to use a different cell monitor and I'll upgrade it to communicate via Bluetooth to a smart phone. The copy one ...

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Where did you find the two Junsi loggers? I've been searching for a supplier for over 12mths with zero luck. The factory stopped making them over 2yrs ago and all my usual supply contacts have run out of stock.

T1 Terry

I would suspect the "bypass" failing as the most likely cause. A short or cell failure would have pulled the cell voltage down much lower than 3v and any attempt to recharge would not help. It looks as though it is a small discharge rate and that is more likely to be "bypass resistor" slowly drainin...

Hi, The voltage drop under load says either the cells or the BMS or both are not up to a high current draw. If it really did share the load across both batteries it would only be 85 amps per battery, 85 amps from a 120Ah battery is roughly a 0.7CA draw per battery, the cells should be able to maint...

Hi, I've only had my 2 Solarking 100Ah LiFePO4 batteries, in parallel in our caravan, for just under a year, but that hasn't been my experience. So far. Only problems I've found are: Needed a good battery meter/monitor, & also a DC-DC/MPPT charger. I did have a VIctron MPPT, but removed it to keep ...

I think you will find the weight of the required battery pack would push the lift motor to it maximum output, so then a bigger battery pack to get the 2 hrs would require a higher output motor and/or fan, the loop is a bit like Einstein's E = mc2. The propulsion motor wouldn't be such a big issue. H...

they will come up with some claws that will make it not applicable and not valid

Love it, if was intentional or not, can I use it in future or are you going to copy write it

T1 Terry

Well, for better or worse, (depends on how much you enjoy my company :lol:) I've finally found a way to log into the forum. Seems I.E. is no longer accepted here so I had to install Chrome, then no problems. My IT teco wife tried for an hr or so to clear out any possible issues in my computer and fi...

Lithium batteries inherently have a very low internal resistance. if you attempt to parallel multiple 12v batteries, one battery will do all the work until it fails and that will kill the other batteries in parallel. This also goes for the maximum current load and continuous current load, they will ...

Rather expensive for a parts only purchase that would require an alternate motor controller etc.

T1 Terry

HuffnPuff wrote: ↑

Thu, 07 May 2020, 10:07

Can it be re-registered? There could be a problem there.

Was it sold as a repairable right off or a Statutory Write off and has Tesla black listed the vehicle?

T1 Terry

The last 48v system we installed has a Kubota diesel generator and it plays up big time. The input voltage will steadily climb up to 270vac and then the inverter rejects it, the generator drops back to 220vac and the whole cycle starts again. This fix in this set up is to turn the coffee machine on,...

:lol: Why not go for the big power plant and add a 454 or what ever the big block strokers are up to these days. Add an ultra fast charger and you can add "Supercharged" into the description as well :lol: T1 Terry EDIT: Just did a Google search and it appears to be a 572 big block stroker is the lim...

If the DC to DC works well, I'd look to getting an MPPT controller for the solar. While the DC to DC will also act as a solar controller, they aren't terribly efficient at it because that part is more of an added extra rather than a specially designed double duty unit. The other advantage is you can...

What brand DC to DC is it? All the ones I use either switch internally dependent on which can supply the required current the best, others use a DPDT relay driven by the starter battery so the device becomes a DC to DC charger when the voltage sensing relay closes the circuit from the start battery ...

I have one of the PIP 60 amp MPPT stand alone controllers. Maybe I should pull the boards out and photograph them so it is possible to see what differences there are between the board incorporated into the inverter against the stand alone boards.

T1 Terry

I'm guessing all these figures are for the NWH10, The XW20 only has a max traction voltage of around the 240vdc mark, but that's a bit all over the place with regen over shoot, I've seen 280vdc on the scan gauge when the old traction battery was on its last legs yet officially it is rated at 201vdc....

The age old blade fuse voltage drop. Just for those less experienced but read all these threads to improve their knowledge and understanding I'll add the following rant. Better to not use blade fuses at all if you can avoid it, they are a constant source of voltage drop problems and forget about any...

halfbridge wrote: ↑

Sat, 18 Apr 2020, 13:46

Hi Steve,

Did you end up selling those batteries?

Gumtree link says they are sold. I wonder what hassles and price to import a salvage Chev Bolt, the newer version with the better motor/gearbox design.

T1 Terry

A question if I may, is this fix for the MPPT section or the inverter section of a PIP 2424MS? I have two dead ones here with the main positive cable to the inverter board fried so it would be an interesting project for me to attempt repairing these if things quieten down here at work.

T1 Terry

Another angle, the caps to replace the traction battery and an aux battery built using the smaller capacity LFP or LTO cells that trickle charge from the cap pack at the safe charging rate for the LFP/LTO cells so they retain their cycle life. This combination would greatly enhance the electric assi...

How would the Railway loco super caps be for replacing the traction battery or adding as an aux battery that lives in the spare wheel well the way Jason set my 2006 Prius up?

T1 Terry

Thankyou Matt, that gives me a figure to work from with 48v being the upper cut off point. Now to work out the battery pack size working backwards using an upper limit for the cells well in the safety zone for both capacitors and cells.

T1 Terry

Sorry for the dumb questions, but the 48v mentioned as the base block voltage, is that peak or nominal? Do capacitors even have a nominal voltage? I thought capacitors were not intended to be run near their rated voltage so if the rated voltage is 48v per pack, what would a sensible running voltage ...