AEVA Forums

I hope to have a Leaf to play with soon. Only after a while though, Katherine would need to give her blessing
If nothing else, pulling air conditioned cabin air through the battery would make a world of difference.

Something I've always wondered, if heat rises and cold falls, wouldn't blowing cold air above the battery pack and exhausting it below the battery pack a better method for cooling? I see all these cooling plates the cells sit on, but wouldn't that be the coolest part of the cell? Tesla run pipes up...

I was doing research on the sandalwood plantations up there during my PhD and post-doc. The latest I was ever there was October, and that was pretty rough! I agree it will be difficult to keep the battery cool. Matt's probably right - a conversion with LiFePO4 batteries will handle the heat much bet...

I don't think these chargers are easily serviced, but it could be that an internal overcurrent device has tripped. Or a fuse on the AC side has blown internally? No LEDs all together, whether plugged into a batter on the DC side or a socket on the AC side would suggest it's not getting power from th...

Boom as in small explosion or boom as in that was a sudden and unexpected event?

Is it possible that the DC/DC converter suffered an inrush current issue now that I'd removed the master precharge relay on the battery pack? ... I just noticed on my drive on Saturday that the auxiliary voltage was very low - 11.5 V or so. As if the DC/DC converter wasn't working properly :/ Lack ...

Pondering what's going on with the popped fuse. Is it possible that the DC/DC converter suffered an inrush current issue now that I'd removed the master precharge relay on the battery pack? I would have thought that the 20 A HVDC fuse would have popped before the 200 A HVDC main fuse popped :? I hav...

That should only matter for the ones sitting right-way-up in the middle of the battery pack. All others are normally on their sides, but these can be made to work standing upright.

Today I started to assemble the new battery floor from 6 mm plate aluminium and square hollow section. A total of 8 countersunk M8 high tensile bolts hold the central beam in place, while the front gets a single length of 19 mm SHS which serves as a bit of stiffening, but mainly a solid stop for the...

What size fuse are you using? Semiconductor fuses do weaken over time if they're undersized (current goes above the continuous rating on the regular but doesn't exceed the I2t rating) 200 A Bussman. I have passed 230 A through it while testing but not for long. And its been driven another 50 km sin...

I don't know either - all I know is that the ZEVA wasn't giving an isolation error before it blew, and now it does. I never saw the current exceed 180 amps, but it's possible that it had been 'singed' at some point driving up the hill and the big bump might have weakened it? But I still had power as...

Now that the charger can charge the car, I decided to bypass the master precharge delay and charge the car fully. The Enable feature stopped the charge as soon as the first cell exceeded 4.2 V, which is good. Since the car was driving so I figured, before I go and immobilise the thing for a few week...

No, this is still with the original Enable-only charger. I have put a failsafe relay on the Enable line so it will disconnect the charger once a cell goes high, but this is only a stopgap until the new charger arrives. However my goal this weekend is to install the new battery floor with provision f...

I actually gave him a little hard time about it being such a production ☺. Something something fanbois...

The charger works now! I wanted to move the car, so I got in, powered up, pressed the throttle and it dropped out. Repeat, same thing... Aha! The master contactor isn't closing! The master precharge relay was closing, but it was trying to pass big voltages across a 200 R resistor inside the pack. No...

antiscab wrote: ↑

Thu, 19 Sep 2019, 13:51

I should have just lent you my powerlab6

Pfft. I used a bucket of water and a length of galv wire.

Interesting thread I only just discovered - I have contemplated cutting the floor out of my CRX and stacking a ladder frame worth of batteries in there. I have my doubts as to whether I can fit much in there since it's already so low to the ground...

No, but a neighbour of a senior / elder

Deliveries are happening in Perth. I gave a talk to the Mosman Park Men's Shed about Li-ion batteries (same one I gave at the expo in Brisbane) and this showed up

Guy called Jim brought it along.

Good news coulomb the CAN controlled charger should be here by next Friday. I'm torn now - do I get the car going on 6 modules so we can get it over the pits sooner? And risk the charger not working again, and DoT taking issue with the battery pack floor's occasional oscillations? Or do I hack the c...

Hmmm, might need to swap the AVC2 then?

I'm often surprised when folks will install an air-cooled TC charger directly underneath the hood of the car, or buried deep inside the boot. These things get seriously hot! The fan should work well, just be aware of any dust accumulation. It might not be that difficult to cut a couple of sections o...

I can't do that because there will be a large, structural beam through the centre, along with all the buslinks

I think this will be the least worst way of running coolant through the pack. The return line need not go back through the main battery pack, but it will be a bit neater. The gap between them is about 900 mm, and the axle and 4-wheel steering unit are right in between.