Search found 1149 matches

by T1 Terry
Mon, 24 Feb 2020, 09:48
Forum: Members Machines
Topic: Smokinjoe's Beetle conversion
Replies: 30
Views: 1599

Re: Smokinjoe's Beetle conversion

Did you ever consider doing away with the VW gearbox and transaxle as well? I'm planning on converting my '74 Kombi after the body is restored to its former glory or maybe better than when it left the factory. I'm tossing up doing the conventional 3 phase motor adapted to the existing gearbox, or re...
by T1 Terry
Fri, 21 Feb 2020, 12:16
Forum: General EV Discussion
Topic: Tesla using LFP in China
Replies: 16
Views: 1540

Re: Tesla using LFP in China

Give me 20kWh usable capacity EV with 100-ish kW fast charging capability and infrastructure That is the only real hold up I can see for small cars, smashing 100kW+ into a 20kWh battery. Its easy enough on a 100kWh pack, that's only 1C but into a 20kWh pack all of a sudden it's 5C :shock: Exactly, ...
by T1 Terry
Thu, 20 Feb 2020, 12:26
Forum: Batteries, charging, management and monitoring
Topic: Bendable Graphene Supercapacitors
Replies: 2
Views: 552

Re: Bendable Graphene Supercapacitors

The humble LiFeP04 cell is 325Wh/L so nothing "super" about the energy density.

T1 Terry
by T1 Terry
Tue, 18 Feb 2020, 12:33
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 621
Views: 69958

Re: Prelude conversion project - some questions

I have no idea how far I'd have to dig back to find out which contactor you are using, so I'll just ask :lol: Is it a GX14CAB Gigavac or one of the smaller contactors? I'm not sure if I posted this before, but we gave up on using anything smaller than the GX14 series because of contactor sticking an...
by T1 Terry
Fri, 14 Feb 2020, 08:42
Forum: Members Machines
Topic: Damon’s Fiat 500e project
Replies: 76
Views: 16782

Re: Damon’s Fiat 500e project

Great to hear Damon. It was an epic conversion, not sure I'd have the confidence to tackle it, but after seeing your step by step conversion .... maybe I'd consider it or a similar transplant from a salvage vehicle for a retro build up. If everything moves from one vehicle to the other, theoreticall...
by T1 Terry
Mon, 10 Feb 2020, 14:35
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 416
Views: 49196

Re: Aftermarket iMiEV battery upgrade project

I was planning on using 0.8 mm thick FR4. I used to buy big sheets of it from Regal-Beloit in Welshpool, but I think they stopped selling it. Now you have to go through a wholesaler to buy it. I like FR4 because it's tough, strong and is like kryptonite to electricity. As for the buslinks, I don't ...
by T1 Terry
Mon, 10 Feb 2020, 12:25
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 416
Views: 49196

Re: Aftermarket iMiEV battery upgrade project

Good question... I was planning on getting some 2 mm copper busbars made up with enough cross-section for about 40 mm2. Unfortunately, one crappy little M4 screw hole is pretty ordinary contact, so I plan on putting a kink in the buslink just to the side of the screw hole to ensure some decent surf...
by T1 Terry
Mon, 10 Feb 2020, 12:19
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 416
Views: 49196

Re: Aftermarket iMiEV battery upgrade project

Yeah I fully expect any metal cased battery to be live to the case now. Rather disturbing the spec sheets mention nothing about this. I think the FR4 will work OK. Not ideal, but what can you do. What thickness FR4 are you using? After a few email discussions with Weber he mentioned another drop in...
by T1 Terry
Mon, 10 Feb 2020, 10:43
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 416
Views: 49196

Re: Aftermarket iMiEV battery upgrade project

I'm not sure if these are the same cells, But Jan from the Adelaide branch of the AEVA had his Prius burn to the ground after a short between a cell case and the chassis. I think it was actually the aluminium box he made to hold the cells in the wheel well of the Prius, but that was attached to the ...
by T1 Terry
Sat, 08 Feb 2020, 13:15
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter setting
Replies: 5
Views: 838

Re: PIP inverter setting

Thanks for posting that, I often wondered what all the other settings were for after 29 because I couldn't seem to find any mention of them in the manual. Luckily they aren't part of the charging regime for lithium batteries so it didn't matter, but at least I know that 30 should be set at Eds so th...
by T1 Terry
Fri, 07 Feb 2020, 12:11
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57086

Re: 4Springs' Brumby

I'd go with the PET sheet because it gives you electrical isolation as well. The aim is the keep the cells above 0*C when charging and I believe the PET sheet will not conduct the cold from outside the way the aluminium would and therefore provide a more even heat.

T1 Terry
by T1 Terry
Fri, 07 Feb 2020, 11:56
Forum: Renewable Energy and Storage (Non-EV)
Topic: Un-matching PV panels
Replies: 6
Views: 721

Re: Un-matching PV panels

Linked in series the open circuit voltage would be 248vdc, depends on the inverter but if it is a PiP MS inverter the open circuit limit is 145vdc. You could connect 2 of the 38v Voc panels in series plus one of the 48v Voc panels ( 124vdc Voc) and the other 3 panels the same, then connect both str...
by T1 Terry
Thu, 06 Feb 2020, 15:36
Forum: Renewable Energy and Storage (Non-EV)
Topic: Un-matching PV panels
Replies: 6
Views: 721

Re: Un-matching PV panels

The real drama we are having down this way this yrs is the Vmp drop due to the panel temps. 30vdc Vmp (STC) panels are dropping to 26vdc Vmp or lower around 11am until 4pm resulting in the batteries not reaching fully charged each day. Not so bad with lithium batteries, but the lead acid batteries o...
by T1 Terry
Thu, 06 Feb 2020, 12:44
Forum: Renewable Energy and Storage (Non-EV)
Topic: Un-matching PV panels
Replies: 6
Views: 721

Re: Un-matching PV panels

Linked in series the open circuit voltage would be 248vdc, depends on the inverter but if it is a PiP MS inverter the open circuit limit is 145vdc. You could connect 2 of the 38v Voc panels in series plus one of the 48v Voc panels ( 124vdc Voc) and the other 3 panels the same, then connect both stri...
by T1 Terry
Wed, 05 Feb 2020, 12:00
Forum: Nissan
Topic: Importing Leaf ZE1 (current) model..
Replies: 32
Views: 3365

Re: Importing Leaf ZE1 (current) model..

Hi I have just bought through J spec a 2104 leaf azeo x with a battery that appears to test well with Leaf Spy, the interesting thing is that apart from the charging history being a bit odd for the kms it is a sub 20k kms car and I believe if Bens (who really is just as helpful as others say) numbe...
by T1 Terry
Wed, 05 Feb 2020, 11:54
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 191
Views: 25183

Re: Francisco's Electric Pajero

Clever move, maybe you can find someone who wants the rolling chassis EV powered to run around their property or as a number plate swap unit for one they had written off.

T1 Terry
by T1 Terry
Wed, 05 Feb 2020, 11:51
Forum: Hyundai
Topic: Hyundai Kona road Noise
Replies: 14
Views: 1952

Re: Hyundai Kona road Noise

Is the Jaycar stuff cheaper? I'm guessing from reading a few of the posts that they were the supplier

T1 Terry
by T1 Terry
Wed, 05 Feb 2020, 10:12
Forum: Hyundai
Topic: Hyundai Kona road Noise
Replies: 14
Views: 1952

Re: Hyundai Kona road Noise

Is that as good or better than this stuff and what about price? http://www.dynamat.com/automotive-and-transportation/automotive-restoration/dynamat-xtreme/ This is the stuff they swear by for sound deadening a VW Kombi, you know all about road noise when you own an early model one of these :lol: T1 ...
by T1 Terry
Tue, 04 Feb 2020, 12:53
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 191
Views: 25183

Re: Francisco's Electric Pajero

It that a smashed windscreen? Part of the engine & Transmission removal or prior to the job?

T1 Terry
by T1 Terry
Tue, 04 Feb 2020, 12:48
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 443
Views: 73144

Re: Low cost BMS

As a matter of interest, what voltage is required for the current to increase to an amount that would be regarded a charging current, say above 1 amp or more? Once this threshold has been reached, if the voltage is again dialled back to 3.8v, is the current still only 1.5mA?

T1 Terry
by T1 Terry
Tue, 04 Feb 2020, 09:59
Forum: Batteries, charging, management and monitoring
Topic: Repurposing hybrid batteries for a full BEV
Replies: 6
Views: 884

Re: Repurposing hybrid batteries for a full BEV

If you can find a Prius traction battery at a wreckers, it isn't difficult to swap the cells around to increase the capacity while dropping the voltage. But you might be better off getting the cells from Matt because he will know what cells are worth the effort and which cells are just paper weights...
by T1 Terry
Tue, 04 Feb 2020, 09:47
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 443
Views: 73144

Re: Low cost BMS

 "When the charging is disconnected and a few amp load connected across the cell, how long does it remain above 3.6v? Only a few [edit: tens of] seconds. But, as expected, after I disconnect the load (a headlight bulb) the voltage slowly rises above 3.6 V again." Sounds like a high internal resista...
by T1 Terry
Mon, 03 Feb 2020, 15:34
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 443
Views: 73144

Re: Low cost BMS

@T1 Terry, It's possible that some old models of the EV Power CMUs started bypassing at a higher voltage, but the present-day specification clearly states that it starts bypassing at 3.5 V. But I agree that the present-day EV Power spec of not turning on the alarm until 4.0 V leaves much to be desi...
by T1 Terry
Mon, 03 Feb 2020, 15:19
Forum: Technical and conversion discussion
Topic: VW T3 syncro conversion
Replies: 7
Views: 1065

Re: VW T3 syncro conversion

I guess the other upside is the reduced losses through the various transmissions when only requiring 2WD. Can the front axle be fitted with free wheeling hubs? Can you add a planetary gearset between the motors and diff? That would allow a very low ratio to be selected when 4WD crawling was required...
by T1 Terry
Mon, 03 Feb 2020, 08:51
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 443
Views: 73144

Re: Low cost BMS

The units I linked to are the same as units I purchased some yrs back from one of the WA suppliers, not sure which at the moment. They most definitely don't start bypassing till the cell reaches 3.8v and stop bypassing at 3.6v. These units shift 5 amps with a cell voltage of 3.8v or higher and the h...