Canbus and PID for the IPace

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kermit68
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Re: Canbus and PID for the IPace

Post by kermit68 » Mon Apr 05, 2021 8:26 pm

dernotte wrote:
Mon Apr 05, 2021 2:55 pm
I don't, for the moment, but I am not sure it is available, or maybe in the Instrument Panel Cluster Module (720).
When I look at the OVMS code for other car, they usually try to "correct" the raw value with a formula.
When you have time could you please check 0xd031 on 720 ? I got a value of 76 while my displayed Soc was 77% . Also it is interesting 0xdd06 as in my case it has a value of 231 (231/3=77). Just guessing of course ...
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

dernotte
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Re: Canbus and PID for the IPace

Post by dernotte » Tue Apr 06, 2021 12:20 am

On my side, with a displayed SOC=78%, PID D031= 65 (decimal), and DD06=100 (decimal).
I did a quick search, and was not able to find anything close to 78, 780, or 7800.

Maxwell_400
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Re: Canbus and PID for the IPace

Post by Maxwell_400 » Tue Apr 06, 2021 7:30 am

iomagico wrote:
Sat Apr 03, 2021 7:02 am
BECM PID 4912 is Max discharge power, same Max Charge power formula.
Thanks, now I can get some peace in my mind. :D
I-Pace SE++, MY20, 18" summer & winter, no panoroof, towbar, spare wheel, 20C, TCU 19.2, BECS: BP-AAE-BC-AC-BE

kermit68
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Re: Canbus and PID for the IPace

Post by kermit68 » Tue Apr 06, 2021 7:51 am

dernotte wrote:
Tue Apr 06, 2021 12:20 am
On my side, with a displayed SOC=78%, PID D031= 65 (decimal), and DD06=100 (decimal).
I did a quick search, and was not able to find anything close to 78, 780, or 7800.
Thanks anyway, I'll keep using a conversion formula from real soc until we'll identify the displayed soc
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

Maxwell_400
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Location: Norway

Re: Canbus and PID for the IPace

Post by Maxwell_400 » Tue Apr 06, 2021 10:15 am

iomagico wrote:
Sat Apr 03, 2021 7:02 am
BECM PID 4912 is Max discharge power, same Max Charge power formula.
Available power to the wheels drop rapidly when SOC falls below 20%. Make sure you are charged when you want to show off.

Figure_power.png

I-Pace SE++, MY20, 18" summer & winter, no panoroof, towbar, spare wheel, 20C, TCU 19.2, BECS: BP-AAE-BC-AC-BE

kermit68
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Re: Canbus and PID for the IPace

Post by kermit68 » Tue Apr 06, 2021 2:17 pm

ANBO wrote:
Sun Mar 21, 2021 7:30 pm
BTW also found that SOC (%) val{*7E4(BECM) Battery State of Charge Minimum}/(86.2/90.2) aligns perfectly with the SOC of the car and Wattcat, where the latter two our rounding down to a full integer.
I tested your formula and for middle to high values of Soc actually it works. But I think the lower the Soc the bigger it will be the error. Basically you're multiplying Soc min by 1,04 (90.2/86.2) so for example the formula will never go to zero as Soc min will always be greater than zero.
I tried to use a linear formula for the conversion (96.6 = 100% and 2.5 = 0%) but I can't align the numbers. I'm pretty sure about
96.6% being the max for real Soc min while 2.5% it's just a guess but even playing a little bit with that I can't match the displayed Soc of my car.
Any suggestion?
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

kermit68
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Re: Canbus and PID for the IPace

Post by kermit68 » Wed Apr 07, 2021 9:31 am

Yesterday I grabed some data and I'm now testing the following formula:

Displayed_Soc = (Real_Soc_Average * 1.08) - 3.2

It goes to zero when Real Soc avg is equal to 2.6 and is equal to 100 with real soc avg is 96 (more or less). It maybe not perfect but it should be a good aproximation I think.
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

kermit68
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Re: Canbus and PID for the IPace

Post by kermit68 » Wed Apr 07, 2021 10:24 am

Maxwell_400 wrote:
Tue Apr 06, 2021 10:15 am

Available power to the wheels drop rapidly when SOC falls below 20%. Make sure you are charged when you want to show off.

Figure_power.png
But maximum power shouldn't be 295 kw ? I see in the graph that it goes well above ...
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

Maxwell_400
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Re: Canbus and PID for the IPace

Post by Maxwell_400 » Wed Apr 07, 2021 11:19 am

kermit68 wrote:
Wed Apr 07, 2021 10:24 am
Maxwell_400 wrote:
Tue Apr 06, 2021 10:15 am

Available power to the wheels drop rapidly when SOC falls below 20%. Make sure you are charged when you want to show off.

Figure_power.png
But maximum power shouldn't be 295 kw ? I see in the graph that it goes well above ...
This is what the battery can deliver, the motors are restricted to 147kW each. We can only hope for an SVR version which can unlock more power, the motors are rated for 195kW (355Volts x 550 Amps) each in 10 sec bursts.
I-Pace SE++, MY20, 18" summer & winter, no panoroof, towbar, spare wheel, 20C, TCU 19.2, BECS: BP-AAE-BC-AC-BE

kermit68
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Re: Canbus and PID for the IPace

Post by kermit68 » Wed Apr 07, 2021 1:39 pm

Clear, thanks for the explaination.
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

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