You have 3 of 45kwh packs in one EV? That's 135kwh ! I think you stole
"insane" from tesla :)
Peri
------ Original Message ------
From: "Roland via EV" <[email protected]>
To: "damon henry" <[email protected]>; "Electric Vehicle Discussion
List" <[email protected]>
Cc:
Sent: 24-Dec-16 7:39:06 AM
Subject: Re: [EVDL] Sequence of Events contactors
Hello Damon,
Just came up from the dungeon, I mean from the EV lab. I normally do a
pre-drive inspection about 30 minutes I leave. Make sure the cab
heaters and battery heaters come on which are power by commercial power
through the main EV power input plug.
I will have to leave in a short time, so here is a short list of
equipment in my EV. Will come back with more detail later.
Battery pack is three Nissan 225 volt 200 ah Li-Poly battery pack in
parallel.
Battery charger is a PFC-50 Manzanita 12 to 400 vdc at 50 amp rating.
Has eight mode settings.
Motor controller is a Café Electric 1000 amp rating. Also has a motor
ampere indication circuit which I think is very important.
Orion BMS system which is enclosed in a cast aluminum box which has
overload limits for each cell circuit.
Net Gain Warp 11 motor that has a pilot shaft to drive a rotating
inverter alternator. This unit provides 7 kw of 110 vdc which is then
inverted to 120 vac 60 hz at 5 kw.
The rotating inverter provides power and REGEN to the all the 12 vdc
accessories and four 120 vac 60 cycle heaters. One for the battery
box, two for the passenger compartment and one 1000 watt water heater
for the existing heater core.
Going down a long icy hill, this inverter load will hold the EV from
increase speed.
This EV has back up circuits which are control by a back up rocker
switches that are in a matrix of 42 switches in the console. Also acts
like a cycle lock system.
Roland
Four IOTA DC-DC converters only use as a back up. Control by a switch
on the dash that provides 225 volts from the battery pack by two 100
amp contactors.
________________________________
From: EV <[email protected]> on behalf of damon henry via EV
<[email protected]>
Sent: Thursday, December 22, 2016 8:23 AM
To: Robert Bruninga; Electric Vehicle Discussion List
Subject: Re: [EVDL] Sequence of Events contactors
There is no standard way of handling startup, so to say "most" is a bit
misleading. What you describe certainly does not fit the sequence of
either of my two OEM hybrids, nor does it match my two DIY EVs. There
is no definitive answer to the question posted.
Perhaps a better question needs to be asked. Something a bit more
specific. For instance, I am planning on converting an ICE to an EV.
What is a safe startup sequence to power on my 12 volt and traction
circuits and what components are required? Even then, more details are
better, for instance do you have a DC-DC converter, and what kind of
motor controller are you using.
Damon
________________________________
From: EV <[email protected]> on behalf of Robert Bruninga via
EV <[email protected]>
Sent: Thursday, December 22, 2016 7:10:20 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Sequence of Events contactors
Most EVs and Hybrids have at least three contactors. The sequence is:
* Close One battery lead and check for leakage
* Drop that relay and close the other lead with a series resistor and
check for leaks
* Bring the first one back in to power up still via the series resistor
for a few milliseconds to allow the car system to charge all capacitors
* If still no smoke, pull in a main contactor to bypass the resistor.
You can hear the relay dance in any Prius or most other EV's.
There should be NO heavy loads until all of the above are complete. A
software glitch in the THINK CITY made the mistake of leaving the 4 kW
heater possibly on, so that on the third step above, the 4kW is trying
to
go through a 5W 47 ohm resistor and it blows up. This kills the car,
and
all replacement b0oards are gone, most cannot be repaired, and so the
company is out of business and there are lots of THINK CITY's just
gathering dust.
Bob, WB4aPR
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