Renault Zoe/Leaf PTC heater

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Clanarn
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Renault Zoe/Leaf PTC heater

Post by Clanarn »

So for my e46 build my plan was to use a gasoline Webasto heater. However I managed to squeeze in allot bigger battery than what was first planned which meant that the reduced range by electric heating would have a smaller impact on usability.
l288884a.jpg
Purchased a PTC heater from a 2015 renault zoe which is almost identical to the leaf/E-NV200 one.
Haven't measured the resistance yet but I'm seeing numbers like 1.8kw on the web. Looks like it operates together with a heat pump and only turns on when temperature gets below -5 and the pump doesn't produce heat . Also for defrosting.

Hardware: HV connector, APEX HV280.
LV pinout: nc-nc-LIN-(neg)-nc-(+12v)

Im trying to control it via LIN and thanks to the link and code below been able to communicate.
https://ev-olution.yolasite.com/nissan- ... roller.php
LEAF_DRY_PTC_LIN_controller_V1.1.ino
(2.92 KiB) Downloaded 137 times
So on ID 0x24 I get a response just as ev-olution. Without HV I got 0xCA, 0x00, 0xFE, 0xEE
With HV(280v) and trying to turn it on by sending byte[2] = 10 on ID 0x3B the response on ID 0x24 is 0xCA, 0x80, 0xFE, 0xEE. After that byte[1] on 0x24 seems to be stuck on 0x80.
No response on voltage or temperature change.

I have shorted the HVIL for testing. Could it require a certain resistance instead of a short? Anyone that has done LIN sniffing on their ZOE?
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Re: Renault Zoe/Leaf PTC heater

Post by EV_Builder »

HVIL often is a low (mA) current chain. If the chain is broken HVIL protection activates. Dig in the HVIL implementation of the Zoe. It might be a case of a 4mA current loop. (So connect GND and a resistor and 5volt so you get 5mA.
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Re: Renault Zoe/Leaf PTC heater

Post by Clanarn »

Interesting. Worth a try. Measured between HV neg and one of the HVIL cables and got 12kohm. Doesn't make a low current chain improbable if its isolated I guess.
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Re: Renault Zoe/Leaf PTC heater

Post by johu »

On my Webasto unit interlock was just two shorted pins. Likewise on the Leaf service disconnect, the HV outputs and the A/C compressor. I guess some "interlock master" does indeed put a signal on this daisy chain (in case of the BMS it is actually a square wave) and if the signal doesn't return it knows that one of the HV connectors is unplugged and can react appropriately, e.g. by opening the main battery realays.
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Re: Renault Zoe/Leaf PTC heater

Post by Clanarn »

Ran 4mA across the HVIL. Required 2.5V which seems resonable. Made no difference. Maybe it needs a combo of that and a signal generated from a master as you describe Johu. I doubt it however.
Here is the code I have been testing with.
ZOEptc.ino
(749 Bytes) Downloaded 115 times
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Re: Renault Zoe/Leaf PTC heater

Post by raine »

Hi, has anyone been able to figure out the polarity of the HV connector of the Leaf ptc heater 27143-3NF1A?
FA2C606B-3388-4C1E-B464-A7D13154A1D8.jpeg
Even it is resistive load, I guess, the polarity matters.

Many thanks!
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Re: Renault Zoe/Leaf PTC heater

Post by EV_Builder »

How is the heat intensity controlled and where is it done?
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Re: Renault Zoe/Leaf PTC heater

Post by raine »

EV_Builder wrote: Sun Jun 12, 2022 4:21 pm How is the heat intensity controlled and where is it done?
Trying to mimic the work shown at link (https://ev-olution.yolasite.com/nissan- ... roller.php). I only have 170V dc available at home now and feels the heater is not working with that. I keep trying…

Polarity sorted out here:
CC7F3242-C444-4080-9DAB-ECBFE4DD9FA7.jpeg
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