Search found 677 matches

by 4Springs
Sat, 14 Nov 2020, 14:29
Forum: General EV Discussion
Topic: getting small business to share their powerpoints
Replies: 17
Views: 361

Re: getting small business to share their powerpoints

AEVA developed a series of brochures some years ago to help you approach businesses. This one is a nice introduction, and includes a bit on Plugshare: https://aeva.asn.au/files/146/.
by 4Springs
Mon, 26 Oct 2020, 06:32
Forum: Batteries, charging, management and monitoring
Topic: Chargers being turned off
Replies: 19
Views: 619

Re: Chargers being turned off

I have had to turn chargers off when they are charging at full pace and have had nothing go wrong. That may have been just good luck! Me too. Lately, I've been turning power outlets on and off with a timer to charge during off peak times. I've done this with an Outlander EVSE, a Gelco EVSE (both ty...
by 4Springs
Tue, 20 Oct 2020, 17:51
Forum: Hyundai
Topic: Urgent advice for Kona EV owners
Replies: 21
Views: 724

Re: Urgent advice for Kona EV owners

You'd think they'd be passionate and informed about the cars they sell. Certainly not in my experience! A recall is not a particularly unusual thing, it's not like they'd all be running around panicking. For instance this one, also Hyundai, also potential for a fire, also recommended 'don't park in...
by 4Springs
Sun, 11 Oct 2020, 08:29
Forum: Hyundai
Topic: How many Kona or Ioniq EVs in Australia?
Replies: 13
Views: 537

Re: How many Kona or Ioniq EVs in Australia?

Label your axes Chris!
by 4Springs
Fri, 02 Oct 2020, 05:37
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 652
Views: 72148

Re: Prelude conversion project - some questions

jonescg wrote: Thu, 01 Oct 2020, 08:17 Which is good, as this gives me a decent location to start filling the whole thing with encapsulating resin.
Will you encapsulate the connecting plates as well? Or leave those un-potted and open to a cooling breeze?
Are you talking plain old resin, or some kind of thermally conductive goo?
by 4Springs
Sat, 26 Sep 2020, 15:28
Forum: Charging Infrastructure
Topic: Destination chargers for Motels, etc: Suggested install?
Replies: 8
Views: 1082

Re: Destination chargers for Motels, etc: Suggested install?

Nagaman wrote: Sat, 26 Sep 2020, 15:16 Yeah I’m hoping the mods fix it.
I'm a bit slow. Didn't realise what a mod was! Finally realised that I am one....
by 4Springs
Sat, 26 Sep 2020, 13:28
Forum: General EV Discussion
Topic: EV Charging Space Etiquette
Replies: 22
Views: 927

Re: EV Charging Space Etiquette

Chuq wrote: Sat, 26 Sep 2020, 09:38 This is another option that I've seen around recently: https://www.needtocharge.com/
Ah, it even works if you're not signed up!
I just sent you a message without having an account myself. Sorry, but you knew it would happen...
by 4Springs
Sat, 26 Sep 2020, 06:00
Forum: General EV Discussion
Topic: EV Charging Space Etiquette
Replies: 22
Views: 927

Re: EV Charging Space Etiquette

Regarding Charge space etiquette, I wish people would leave a card on their dash with name & phone #. It would be nice knowing how long you may have to wait (particularly in the single car NRMA stations in outer/rural areas). Checking in on Plugshare.com is a ready-made way of doing this. You can n...
by 4Springs
Mon, 21 Sep 2020, 06:14
Forum: Hyundai
Topic: Has Anyone Swapped Out The Nexen Tyres on Kona?
Replies: 33
Views: 2331

Re: Has Anyone Swapped Out The Nexen Tyres on Kona?

Trying to work out whether to change out the tyres on delivery or not (at least I might get something back for the Nexen tyres). Another vote for doing it on delivery. Without actually testing this, I reckon our Kona has a greater stopping distance than our 1992 Brumby. Wide, soft tyres on the Brum...
by 4Springs
Sun, 20 Sep 2020, 08:18
Forum: Hyundai
Topic: Frunk/Froot for Kona
Replies: 32
Views: 4302

Re: Frunk/Froot for Kona

I don't know about where you are but the local libraries near me have 3d printers and you can go there with a usb and they will print stuff for you. Its dirt cheap as well, basically just the cost of the filament. Thanks for the tip! It turns out that there is a 3D printer in the public library in ...
by 4Springs
Sat, 19 Sep 2020, 15:36
Forum: Hyundai
Topic: Frunk/Froot for Kona
Replies: 32
Views: 4302

Re: Frunk/Froot for Kona

I bought a 30 litre container from Bunnings, 3D printed some posts that use the rubbers from the engine cover to mount to the car. The 3D printed posts have slots for aluminium bars 2mm X 25mm , unfortunately Bunnings sell 1mm and 3mm bars so I had to double up the 1mm bars. I will modify and print...
by 4Springs
Thu, 03 Sep 2020, 06:13
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

What is the cell voltage when fully charged? 4.02 - 4.03 V So not full (4.166 V). This voltage should equate to about 90% if you believe the published specs, or about 50% if you believe Francisco's table. I'm putting in about 35 kWh out of the rated 40 kWh, or 87%. There are two ways I can see to i...
by 4Springs
Wed, 02 Sep 2020, 19:24
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

With the balancers operating all the time, how do you determine the difference between cell voltage and cell capacity? Is the cell voltage and charge capacity linear like a lead acid cell, assuming ther is no surface charge involved? I'm not sure that the difference is of any consequence, and yes, ...
by 4Springs
Thu, 27 Aug 2020, 07:45
Forum: General EV Discussion
Topic: Vehicle servicing by dealer, or find another option?
Replies: 14
Views: 553

Re: Vehicle servicing by dealer, or find another option?

Hi to everyone, I'm in Perth and have a MG ZS EV on order arriving some time in the next few months. The question is do I get it serviced by the dealer or do I go looking for an alternative as I live in Joondalup about 35km. North of the dealer? I'm always a fan of the local mechanic. We don't quit...
by 4Springs
Tue, 25 Aug 2020, 19:36
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 443
Views: 73753

Re: Low cost BMS

One weakness in the calibration algorithm that I've implemented is that it is stored in volatile memory. So if the board is ever disconnected, or if the watchdog timer reboots it, it will lose the calibration. I've learned a bit more about the PIC microprocessors, and I'm now using non-volatile sto...
by 4Springs
Tue, 25 Aug 2020, 18:58
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

Does your BMS sense high cell voltage to stop the charging as well as the total battery voltage? Yes. The way it was set up with LFP cells was that it would turn the charging current down when the first cell reached the voltage at which it started bypassing. The lower charge current was about the s...
by 4Springs
Tue, 18 Aug 2020, 09:38
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

I drove it yesterday until the lowest cell reached 3.1 V under load. Then I drove the 1 km or so home after that. I managed 106 kM. Did you let the pack sit after that to see what the voltage settled to? This time I did, and found that the lowest cell had come back up to 3.17 v after about 30 mins....
by 4Springs
Tue, 18 Aug 2020, 09:32
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

I've made some adjustments to the BMS, and the charger is now charging to the limit, whereas previously the BMS was turning it off at a lower limit. This added a few extra kWhs to the pack, but it is still not fully charged. I took it for another test drive, and managed a more respectable total of 1...
by 4Springs
Mon, 17 Aug 2020, 19:25
Forum: Batteries, charging, management and monitoring
Topic: Caps over terminals?
Replies: 5
Views: 460

Re: Caps over terminals?

No, these are terrible. You should not use them at all. I can take them off your hands for you, please send them now!
by 4Springs
Wed, 12 Aug 2020, 05:35
Forum: Batteries, charging, management and monitoring
Topic: what is peoples thoughts on Active Equalizer Balancer Boards?
Replies: 16
Views: 1476

Re: what is peoples thoughts on Active Equalizer Balancer Boards?

Samsung SDI 63AH CELL Nominal Cell Voltage,3.7V Capacity 63AH Erergy WH 233 Cell weight, 1.8KG Cell dimensions, 175mm, 145mm, 25mm C rating 1.5C continuous 5C burst current Stud Size M8 Configuration was 8S 2P 63AH cells 2020-08-03 noon . . . . . . . . . . . . . . . . . . 2020-08-11 noon 4.02 . . ....
by 4Springs
Mon, 10 Aug 2020, 06:32
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 37
Views: 3124

Re: tractor conversion

It really picks up nicely when you put your foot down too. The next video from YouTube had the tractor with its engine noisily idling away, it'll be much nicer to work around it once the conversion is finished. It makes me wonder why we don't have more commercial electric farm equipment already (bu...
by 4Springs
Mon, 10 Aug 2020, 05:38
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 37
Views: 3124

Re: tractor conversion

pirpy wrote: Mon, 10 Aug 2020, 01:59 Zapi in pump mode, no regen, I need reversing and breaking contactors for regen.
Still 32 V
https://youtu.be/8LywRt-vLU8
Ah, that looks better. Nice demonstration of going quite slow.
I just noticed your signature and I'm impressed. I only have 2 cows!
by 4Springs
Sun, 09 Aug 2020, 19:01
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

But did the charger take the full 3.3 kW for all 11 hours, or nearly all? Usually the charge current and therefore power will taper off towards the end. Probably the full rate for the 11 hours, but with room for a little doubt. There are actually two chargers, and I can only monitor the consumption...
by 4Springs
Sun, 09 Aug 2020, 18:33
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

I did some measurements a while ago because the state of charge did not seem to match what was on the data sheet. ... So if you are stopping at 4v then you are probably only using about 50% of the capacity Now you tell me! If I use your table with my charging figures above, I only charged to about ...
by 4Springs
Sun, 09 Aug 2020, 18:16
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57560

Re: 4Springs' Brumby

Now I have some figures from charging this pack, to compare with the discharge figures. When I started driving (discharging), cell voltages were around 3.95 V. I need to fine tune the charging algorithm in the BMS to get them up a bit higher. I drove for 106 km, which I estimate to be about 20 kWh b...