Search found 3396 matches

by Richo
Today, 13:25
Forum: EV Racing
Topic: Some pictures of the Energica Ego race bike, fairings off.
Replies: 8
Views: 78

Re: Some pictures of the Energica Ego race bike, fairings off.

ADR19 6.9 re the indicators used as hazard warning. Seems there is NO requirement for the bike to be OFF and flashing. ie the bike can be ON to flash unlike a car. So there is NO requirement to have a 12V battery. Other than isolating the HV traction pack. But hey if they want 300+ volts running aro...
by Richo
Yesterday, 12:26
Forum: EV Racing
Topic: Some pictures of the Energica Ego race bike, fairings off.
Replies: 8
Views: 78

Re: Some pictures of the Energica Ego race bike, fairings off.

Energica wrote: Unlike many other brands, Energica doesn’t use a dedicated 12V system for the bike’s electronic systems
Well there goes safety and aus compliance out the window.
I'm guessing this is a track bike only?!?
by Richo
Mon, 18 Mar 2019, 13:01
Forum: Batteries, charging, management and monitoring
Topic: EOI - New Yinlong LTO cells Australia
Replies: 5
Views: 174

Re: EOI - New Yinlong LTO cells Australia

1. faster charging: 6mins fully charged 22kVA 3-phase at home charged in 6 min is 2.2kWh. So an electric scooter with 3 phase charging?!? Bigger than that you either need DC charging, your own sub station or will be slow charging just like every other chemistry. 2. high discharge rate: as much as 1...
by Richo
Thu, 28 Feb 2019, 12:23
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

3.45V will get the pack 80-90% full but won't ever over charge them.
Eventually the current will drop back to the total leakage current (mA).
4 days to go...
by Richo
Tue, 26 Feb 2019, 12:37
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 8
Views: 400

Re: E63 LG 63Ah NCM battery group buy

Sorry do you have dimensions and general specs on the cells?

The USD$45 is that the cost price at the supplier over seas?
Even if it were that is still on par with the cost of the 2nd hand leaf cells when they were more available.
by Richo
Tue, 26 Feb 2019, 12:35
Forum: Batteries, charging, management and monitoring
Topic: Toyota Prius Copper Bus Bars - Tin or Nickel Plate
Replies: 3
Views: 454

Re: Toyota Prius Copper Bus Bars - Tin or Nickel Plate

So they were already premade for the prius? That's lucky

That link looks quit good.
I see they do custom ones.
I'll have to give it a go on my leaf cells.
by Richo
Mon, 25 Feb 2019, 12:39
Forum: Scooters, mopeds and electric toys
Topic: Importing Electric kick scooters
Replies: 6
Views: 264

Re: Importing Electric kick scooters

"Initially, Transport and Main Roads wrote to the scooter-sharing company to warn users they would be breaking several laws if they took one of the "illegal" scooters for a spin during a planned trial, with fines of up to $10,444." Ah see there's the problem. There are so many ways to help the worl...
by Richo
Tue, 19 Feb 2019, 12:23
Forum: Parts & Suppliers
Topic: ZEVA
Replies: 7
Views: 251

Re: ZEVA

From my understanding he designs electronics and the eV stuff then get sold through evworks.
No workshop etc to visit as such of his - other than evworks.
I did have his number on my phone before it died.

Is there something you need designing?
I'm in welshpool.
by Richo
Mon, 18 Feb 2019, 12:54
Forum: Scooters, mopeds and electric toys
Topic: Importing Electric kick scooters
Replies: 6
Views: 264

Re: Importing Electric kick scooters

Segway get through as they are classified as off-road use only and now for approved specialised tour groups. The other issue is even if you get them in once you pay for EMC plus safety certs to be able to sell them you'd need to sell a lot to even break even. Its an endless on going problem https://...
by Richo
Fri, 15 Feb 2019, 12:55
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

The flyback diode goes on the 12V side of the contactor. The controller should have motor protection on the HV side. Even less requirements to add something for 3-phase design. Normally it's not a TVS diode anyway. Just a rectifier diode pointing from -HV to +HV. Something like an APT60S20BG would p...
by Richo
Thu, 14 Feb 2019, 13:01
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

Ribfeast wrote:
Thu, 14 Feb 2019, 11:06
the Samsung SDI 20 profile is designed for a 16 cell LiFePO4 pack, so this is the likely path I will take.
Richo wrote:
Thu, 14 Feb 2019, 12:59
So LiFePO4 would be 15 cells. 48V nom. 54.7V charge.
So charging to 53V would loose almost nothing as a useable capacity.
Hmmm 15..16..
by Richo
Thu, 14 Feb 2019, 12:59
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

Looks like the Delta-Q 48V charger can put out up to 72V, question is how much voltage the lithium profile is set to (hoping around 53V). Not sure if the charger will let me run it without a battery attached to find out, and I'm not getting any response from their support which is frustrating... In...
by Richo
Wed, 13 Feb 2019, 12:41
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

I wasn't planning to mess with the Sevcon, plan was to pop in 15 or 16 LiFePO4 cells, Zeva BMS, Zeva screen, load new charge profile in Delta-Q and call it a day. Sounds like a fairly reasonable plan given all the options. Glad you pointed out the 57V controller limit, Don't forget these are user a...
by Richo
Tue, 12 Feb 2019, 13:03
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

So are you ditching the 12V LiFePO4 idea? Given we know now that your charger is adjustable. and the controller is adjustable (with programmer). and a BMS is likely... There is no need even to stay with LiFePO4. The only reason I suggested it was because this would have been a drop in replacement wi...
by Richo
Tue, 12 Feb 2019, 12:38
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

The CA100 has an internal resistance of <0.6mR.
So at 200A the loss/sag will be 0.12V.
or less than 2V for the whole pack.
by Richo
Mon, 11 Feb 2019, 14:45
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

$8,500 for one with new batteries.
https://www.truckworld.com.au/search/a~ ... =v~1-z~15-

The specs say it had a 500A controller.
Do you know what model of controller it has now?
by Richo
Mon, 11 Feb 2019, 12:44
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

Generally 12v lithium batteries with internal bms can't be put in series, unless rated to do so. The issue is they tend to use semiconductor based switching devices, which don't have much voltage headroom. True. But they would be referenced to the pack it's on. The issue will be when the BMS detect...
by Richo
Mon, 11 Feb 2019, 12:36
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

Actually the ev works 12V90Ah doesn't have internal BMS. They are matched cells. I don't see why these can't be serialised... How about a simple Zener+resistor overvoltage shunt? The controller should do the low voltage shutdown. A simple voltage gauge on each cell just to proove they are not out of...
by Richo
Fri, 08 Feb 2019, 13:17
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

I believe it has a Sevcon controller, and the motor would probably top out at around 200-300A if I was going flat out up a hill. The Trojans don't have a CCA rating and the max output claimed is <250A. So I'd suspect that they really were never up to the job anyway. The 48V sevcon controllers typic...
by Richo
Fri, 08 Feb 2019, 12:55
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

Sorry if it is borderline why bother with BMS or CAN? I'd keep everything the same/simple and go with a 12V block with the internal BMS. How many 3.2V cells should I get? 15 to make exactly 48V, or 16 cells to make 51.2V which is closer to what the lead acid pack would be? 15cells x 3.2V = 48V nom 1...
by Richo
Thu, 07 Feb 2019, 12:54
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 55
Views: 1362

Re: Lead acid to lithium conversion

For compatibility LiFePO4 is the better option Do you actually flatten it in one day/trip? The 12V packs have no BMS. https://www.evworks.com.au/winston-battery-lp12v90ah-lifepo4-cell-12v-90ah But the full pack would need to be about 48V 200Ah to be eqv. So $4-5k does sound about right. Obviously if...
by Richo
Thu, 31 Jan 2019, 12:50
Forum: Batteries, charging, management and monitoring
Topic: Battery Modules Questions.
Replies: 15
Views: 515

Re: Battery Modules Questions.

I am considering the possibility of making standard battery modules that I could sell to people doing EV conversions. Nice in theory but the market is nowhere big enough to make this profitable. Also I doubt one size fits all as there are too many different cars with different mounts and different ...
by Richo
Wed, 30 Jan 2019, 12:47
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 212
Views: 13501

Re: Prelude conversion project - some questions

Alternatively I could find some closed cell foam and stick that down... EVA would work but would really need to be a continuous piece. So you would have to buy a big sheet just to cut a wired skinny shape o-ring. ~$20 for 2200x1100. I think Clark rubber used to have it on rolls you could buy the me...