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LakeLeaf
Posts: 1424
Joined: Mon Jun 07, 2010 4:15 pm
Delivery Date: 04 Aug 2018
Location: South Lake Tahoe, California

Re: Japan website list PTC option (pack temp control) ? 5kw

Tue Dec 21, 2010 6:41 pm

EVDRIVER wrote:That's so it can heat the water quickly
This thing comes with a built in espresso maker too? :mrgreen:

smkettner
Posts: 7385
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Japan website list PTC option (pack temp control) ? 5kw

Tue Dec 21, 2010 6:42 pm

5 kw, 17,000 BTU? That still seems huge.
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
RAV4 traded in for I-Pace Dec 2018

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TRONZ
Posts: 2240
Joined: Tue Sep 21, 2010 11:01 pm
Delivery Date: 31 Jan 2011
Leaf Number: 202
Location: Denver, CO

Re: Japan website list PTC option (pack temp control) ? 5kw

Tue Dec 21, 2010 10:22 pm

Hummmmm?!?
Every start, is as good as any start can ever be. - Douglas Darden

Stats;
2011 LEAF SL VIN#202, Delivered 01.30.11. Now, by far, the oldest LEAF in Colorado.

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garygid
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Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Japan website list PTC option (pack temp control) ? 5kw

Tue Dec 21, 2010 10:59 pm

So, is it just a 13-amp load (approx.) switched on and off quickly to give a "low-heat" setting, or are there several (many) 500-watt "Resistors" (heating elements), with sometimes many and sometimes fewer "connected" to the traction battery to provide the variable-heating power needed?
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

GroundLoop
Posts: 1725
Joined: Mon Sep 13, 2010 9:31 pm

Re: Japan website list PTC option (pack temp control) ? 5kw

Wed Dec 22, 2010 12:29 am

Given the fluid buffer, it wouldn't have to switch that quickly to keep a stable temperature.

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garygid
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Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Japan website list PTC option (pack temp control) ? 5kw

Wed Dec 22, 2010 12:45 am

From the Service Manual, apparently the Heater Controll switches the heater current On/Off quickly (PWM), powering just "one" heating element.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

kmp647
Posts: 1136
Joined: Tue Jul 27, 2010 4:00 pm
Delivery Date: 11 Nov 2011
Location: Northern Virginia

Re: Japan website list PTC option (pack temp control) ? 5kw

Fri Jan 14, 2011 7:44 pm

Finally found out what PTC stands for. Positive temperature coefficient

It is a ceramic type electric heater element
Uses no water it element to air

Lexus uses them in 2 models to provide cabin heat before the ICE warms up

They put this secondary heater element on top of the water heater core unit and put 12v thru it to provide 500 watts of heat to the cabin/windshield def

Uses a honeycomb material

So seeing that the cold package on the japan website list: heated steering wheel (nice)
Heated seats, heated REAR seat cushion, and 5kw PTC

Maybe a totally different heater , no water based system

Be nice if we could get some real info from Nissan
2012 SL Leaf
order 07/28/2011
took delivery 11/11/11
47,000 miles 10 bars 211 gids
Turned back into Nissan 12/31/14 @ 50,000 miles
BMW i3 rex 24 month lease
2017 BMW X540e phev
Tesla model 3 reservation

AndyH
Posts: 6388
Joined: Fri Apr 23, 2010 3:43 pm
Location: San Antonio

Re: Japan website list PTC option (pack temp control) ? 5kw

Fri Jan 14, 2011 9:23 pm

kmp647 wrote:Finally found out what PTC stands for. Positive temperature coefficient

It is a ceramic type electric heater element
Uses no water it element to air
<snip>
Sorry kmp647 - Groundloop nailed it in post #2. It's not the battery heater, and not a ceramic air heater. :(

Service Manual, HA (heating and AC), page 66:
Image

An earlier schematic shows four computer-controlled heating elements inside the water heater box.

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