Re: [EVDL] Zilla 1141 error - 15mV drop across contactor at 100A

[Matt via EV]

Hi All,

I thought I would post a bit of an update

I tried a brand new hairball that I borrowed from a friend – the new hairball 
also reported errors 1141 and 1124 when I tried to accelerate in any gear.

I had fused both contactor sense connections to the hairball, resulting in 
longer wires running between the contactor terminals and the hairball
Connecting the hairball directly to the contactor with as short a wire as 
possible resolved the issue, which suggests it may have been a matter of 
induced noise in the measurement, of too short a duration for my DMM to have 
picked up.
The noise issue likely hasn’t been sorted out, just that it is no low enough 
that the hairball doesn’t fault

Matt

Sent from Mail for Windows 10

From: Jukka Järvinen
Sent: Thursday, 3 September 2020 7:04 PM
To: Electric Vehicle Discussion List
Cc: Matt
Subject: Re: [EVDL] Zilla 1141 error - 15mV drop across contactor at 100A

High power demand under acceleration could indicate current leaking to the 
motor hull and messing up the car chassis ground (?)  Brush dust issues have 
kept me troubled too many times with weird problems.
-Jukka

to 3. syysk. 2020 klo 13.01 Matt via EV (ev@lists.evdl.org) kirjoitti:
Hi Brains Trust,

I have a Z1k LV.
My hairball gives me errors 1141 and 1124 when I try to accelerate in any gear 
(worst in 5th, and least bad in 1st)

The manual tells me 1141 is contactor high resistance. my DMM measuring the 
voltage across the battery and controller inputs to the hairball puts the 
voltage drop at 15mV for 100A (battery amps that is). Which looks about right 
for a  good contactor

The contactor always drops out when I turn the ignition off, and my DMM 
measures 92v across the contactor (measured at the hairball terminals). My 
conversion is 96v nominal (actual battery voltage is 102v, though the little 
white light on the hairball must act as a voltage divider, dropping 10v)

I opened the hairball, and it looks clean inside - nothing looks damaged 
visually.

Any ideas on what to check next?
Is it possible to see what the hairball is measuring as the voltage drop across 
the contactor?

thanks in advance,
Matt

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[EVDL] Zilla 1141 error - 15mV drop across contactor at 100A

[Matt via EV]

Hi Brains Trust,

I have a Z1k LV.
My hairball gives me errors 1141 and 1124 when I try to accelerate in any gear 
(worst in 5th, and least bad in 1st)

The manual tells me 1141 is contactor high resistance. my DMM measuring the 
voltage across the battery and controller inputs to the hairball puts the 
voltage drop at 15mV for 100A (battery amps that is). Which looks about right 
for a  good contactor

The contactor always drops out when I turn the ignition off, and my DMM 
measures 92v across the contactor (measured at the hairball terminals). My 
conversion is 96v nominal (actual battery voltage is 102v, though the little 
white light on the hairball must act as a voltage divider, dropping 10v)

I opened the hairball, and it looks clean inside - nothing looks damaged 
visually.

Any ideas on what to check next?
Is it possible to see what the hairball is measuring as the voltage drop across 
the contactor?

thanks in advance,
Matt

Sent from Mail for Windows 10

From: paul dove via EV
Sent: Wednesday, 2 September 2020 3:29 PM
To: Mark Abramowitz via EV
Cc: paul dove
Subject: Re: [EVDL] Chinese electric/plasma jet engine.

 Isn't that how a plasma cutter works?

On Tuesday, September 1, 2020, 3:36:03 AM CDT, Mark Abramowitz via EV 
 wrote:  
 
 This is highly simplistic, and really not  very accurate . The formation of 
ozone in the atmosphere is much more complex than that, and results not from 
“other pollutants” but hydrocarbons or volatile organic gases. The amount 
produced, if any is highly dependent on many factors.

And ozone itself is not particularly stable.

There may be a lot of NOx produced, and NOx is a pollutant itself. But it is 
possible that any emissions can be controlled.

If you are talking about plasma (which we are), ozone can be directly produced 
from that, though I am not familiar with the chemistry.

- Mark

Sent from my Fuel Cell powered iPhone

> On Aug 31, 2020, at 7:51 PM, Bill Dube via EV  wrote:
> 
> The NOx pollution would be horrendous.
> 
> Oxides of nitrogen (NO, NO2, etc.) form when air is heated, like in an engine 
> (or in lightning, for example.) NOx is not particularly stable, so it later 
> breaks down in sunlight in the presence of other pollutants to create ozone 
> (O3). More NOX = more O3. The hotter the air gets, the more NOx is produced. 
> A plasma is _way_ hotter than any existing engine. Thus, this plasma 
> propulsion system would produce _way_ more NOx than any existing engine 
> technology. I'm certain it would also produce a lot of O3 as well, since the 
> a plasma is so hot.
> 
> Not a good idea at all. Extremely bad news from an air pollution perspective.
> 
> Bill D.
> 
>> On 9/1/2020 2:28 PM, Lawrence Rhodes via EV wrote:
>> Claims no fossil fuel is needed. Just air and electricity to burn the 
>> plasma.  
>> https://asiatimes.com/2020/05/chinese-researchers-create-prototype-plasma-jet-engine/
>>      Lawrence Rhodes
>> 
>> 
>> 
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Re: [EVDL] Battery Pack drained completely

[Matt via EV]

Both the miniBMS and the cell logs draw current from every cell continuously
It’s only a few mA, but, given enough time it will take the whole battery to 
0v, if not charged



Sent from Mail for Windows 10

From: Alan Arrison via EV
Sent: Monday, 17 August 2020 7:57 AM
To: ev@lists.evdl.org
Cc: Alan Arrison
Subject: Re: [EVDL] Battery Pack drained completely

Ouch! Your whole ex$pensive pack destroyed? What did you do about the 
alarm that was sounding. I'm hoping that the pack isn't really dead and 
there is another problem like the 12V house battery went dead.

Al

On 8/16/2020 1:27 PM, Denis Boutet via EV wrote:
> Hello everyone,
>
> RE: Ranger EV 2000, LiFePO4 pack 104x3.65V China HiPower, 104 Mini BMS 
> + head board, CellLog8 x 13
>
> I need help figuring out what is wrong and how to proceed with this 
> problem.  Any help, suggestion will be greatly appreciated.
>
> The pack seams to have been drained completely by the mini BMS system, 
> or another cause.  In the fall, the head board alarm went off 
> permanently as I was winterizing my truck.  This spring I found the 
> pack was dead.  Find listed here the codes from the NGS:
>
> BAT_PV     0.00V
>
> BCM_OP      2
>
> PREV_OS      7
>
> CCNT   4
>
> ENG_PO    DISABL
>
> LOWVOLT    0
>
> MAINSEN 2,5v
>
> SOC    49.99%
>
> WKDFBMF    NO
>
> BTM_1FT - BTM_39FT YES  (ALL)
>
> LEAK  NO  (9 Ohm)
>
> Next step I beleive is to drop the pack and try and find the faulty 
> mini BMS.  I guess I won't see any green lights, since the pack is dead.
>
> Many thanks for your interest
>
> Denis B
>
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[EVDL] Iota DLS-55 on a 96v battery

[Matt via EV]

Hi All,

I have a conversion that used to run a 144v battery (45 x TS 160AH cells).

I have replaced the battery with a 96v nominal battery (32 x CALB CA 130Ah 
cells) and the DC-DC (IOTA DLS-55) seems to be low on output voltage, due to 
the input voltage being below 130vdc.

I can boost the output voltage by putting the dual voltage plug in, and the 
dc-dc is always on, so I can get away with the new output voltage (currently 
11v when the 96v battery is flat to 13v when the 96v battery is on charge, or 
+0.6v with the dual voltage plug in place).

Has anyone run an IOTA at 96v long term? Did it last? Or am I better off just 
swapping it out with a 96v dc-dc?

Also, does anyone have one of the dual voltage plugs spare (described here: 
https://www.iotaengineering.com/pplib/dlsmanl.pdf illustration 3)

Thanks in advance,
Matt

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Re: [EVDL] Question about charging small LiIon batteries

[Matt via EV]

A silicone diode instead of a schotkey would probably do it, though voltage may 
be a little on the high side if you’re expecting the panel to be very cold when 
the battery is full

Sent from Mail for Windows 10

From: Peter VanDerWal via EV
Sent: Wednesday, 3 June 2020 1:21 AM
To: Electric Vehicle Discussion List
Cc: e...@vanderwal.us
Subject: Re: [EVDL] Question about charging small LiIon batteries

Now why didn't I think of that?  
The chargers I've been looking at have MPTT(or at least they claim to), however 
I could just use two panels.

I have a couple dozen panels left over from an abandoned project: 5V @ 240ma, 
they have conformal coating so reducing them to 5 cells instead of 6 would be 
difficult.
However, I could run a couple diodes in series...

June 2, 2020 10:02 AM, "Matt via EV"  wrote:

> What about no charge control, a solar panel whose Voc is 4.5v (so only 5 
> series cells) and a
> schotkey diode to prevent back flow
> 
> That would have the effect of limiting max voltage to ~4.2v, but at 4v only 
> around 20% of Imp would
> flow (ie charge rate slows right down past 3.6v)
> 
> How much power are you thinking?
> 
> Sent from Mail for Windows 10
> 
> From: Peter VanDerWal via EV
> Sent: Wednesday, 3 June 2020 12:55 AM
> To: Electric Vehicle Discussion List
> Cc: e...@vanderwal.us
> Subject: [EVDL] Question about charging small LiIon batteries
> 
> Somewhat off topic, but I'm hoping someone can help.
> 
> I'm building a solar powered weather station and plan to use 1 or 2 18650 
> cells. There are tons of
> small solar chargers available for these, however they all charge the cells 
> to ~4.2V.
> To maximize life from the LiIon batteries I'd like to keep them between 
> 40-80% charged.
> 
> So what I'm looking for is either a solar module that I can set to only 
> charge the cells to ~3.9V
> or a way to make a 4.2V charger work.
> Since I'm not having any luck finding 3.9V chargers what I've been thinking 
> about is perhaps using
> a schottky diode to drop the 4.2V to around 3.9V. however that would prevent 
> the charger from
> seeing voltage from the battery and it might not start charging. 
> So I'm thinking maybe putting a 100 ohm resistor in parrel with the diode, 
> that would allow the
> charger to see the battery voltage.
> I still have to figure out how much current the microcontrollers, etc. will 
> draw, but it's going to
> be at least 10 mA when idle, with bursts up to several hundred ma when 
> transmitting.
> 
> Does this sound like a reasonable plan? Any better suggestions?
> 
> Thanks, Pete.
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Re: [EVDL] Question about charging small LiIon batteries

[Matt via EV]

What about no charge control, a solar panel whose Voc is 4.5v (so only 5 series 
cells) and a schotkey diode to prevent back flow

That would have the effect of limiting max voltage to ~4.2v, but at 4v only 
around 20% of Imp would flow (ie charge rate slows right down past 3.6v)

How much power are you thinking?

Sent from Mail for Windows 10

From: Peter VanDerWal via EV
Sent: Wednesday, 3 June 2020 12:55 AM
To: Electric Vehicle Discussion List
Cc: e...@vanderwal.us
Subject: [EVDL] Question about charging small LiIon batteries

Somewhat off topic, but I'm hoping someone can help.

I'm building a solar powered weather station and plan to use 1 or 2 18650 
cells. There are tons of small solar chargers available for these, however they 
all charge the cells to ~4.2V.
To maximize life from the LiIon batteries I'd like to keep them between 40-80% 
charged.

So what I'm looking for is either a solar module that I can set to only charge 
the cells to ~3.9V or a way to make a 4.2V charger work.
Since I'm not having any luck finding 3.9V chargers what I've been thinking 
about is perhaps using a schottky diode to drop the 4.2V to around 3.9V. 
however that would prevent the charger from seeing voltage from the battery and 
it might not start charging. 
So I'm thinking maybe putting a 100 ohm resistor in parrel with the diode, that 
would allow the charger to see the battery voltage.
I still have to figure out how much current the microcontrollers, etc. will 
draw, but it's going to be at least 10 mA when idle, with bursts up to several 
hundred ma when transmitting.

Does this sound like a reasonable plan? Any better suggestions?

Thanks, Pete.
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Re: [EVDL] : V2g for DIY EV's

[Matt via EV]

There’s plenty available with export limiting, just about every manufacturer 
offers it

They all involve installation of a meter (after the utility meter) to provide 
feedback to the GT

https://www.ginverter.com.au/Export-Limitation-Solution.html

There are heaps of installations here in Australia near edge of grid where the 
utility has placed an administrative 0 export limit.

Sent from Mail for Windows 10

From: Alan Arrison via EV
Sent: Wednesday, 27 May 2020 10:56 AM
To: ev@lists.evdl.org
Cc: Alan Arrison
Subject: Re: [EVDL] : V2g for DIY EV's

Sounds dangerous and possibly illegal. There is no inverter that can 
supply the actual power you are using and not back-feed the grid.

On 5/26/2020 7:48 PM, Steve Clunn via EV wrote:
> The inverter I'm using actually claims to not back feed to the grid but
> only to supply power that one is using personally. In the ad they describe
> the meter running backwards and people getting charged for giving
> electricity  so  they understand the situation . I'm not sure I believe
> this claim because detecting what the house is using and what's going to
> the grid does not seem easy without something monitoring the power going
> out of the house. I can turn everything off in the house and see. The grid
> tie inverter that I'm using can run on batteries and I'm using it in the 96
> volt mode which goes up to about a hundred and thirty volts. In maximum
> power point tracking mode it goes up to 180 volts. I have three cars wired
> up with 30 cells leaf and Tesla batteries. They all plug-in together in
> parallel , solar panels , tie inverter and three cars. The BMS of each car
> will shut off if the voltage gets too low or high and take that one car out
> of line. In general I use about 10% of a car's charge at night. It's been
> running about a year now but it constantly changes. At one time I talked to
> the utilities about getting a different meter but it was a little expensive
> and it's how I came up with this idea that I'm using now.
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Re: [EVDL] Lead alkaline battery

[Matt via EV]

I have come across a couple of ZEV scooters in my time
They’re really poorly made, and the performance numbers are fanciful at best

There’s a couple of long running owners threads over at visforvoltage.org 

Sent from Mail for Windows 10

From: Paul Compton via EV
Sent: Monday, 30 September 2019 4:32 AM
To: Electric Vehicle Discussion List
Cc: Paul Compton
Subject: [EVDL] Lead alkaline battery

Lots of hype, very few numbers...

https://www.zelectricvehicle.com/S-Series?fbclid=IwAR1mYREgkWhFwMbTgwYC3yR1K21tSNa_1mmz90Z-HjQCdhr_d8dI72wqtNc

-- 
Paul Compton
www.morini-mania.co.uk
www.paulcompton.co.uk (YouTube channel)
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