09-14-2020, 04:33 AM | #1 |
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G05 X5 45e Regen Braking Coding
Greetings,
I have an X5 45e on order. Does anyone know if regenerative braking intensity can be customized? I asked the dealer but they are clueless. I know the regen can be alternated between on and off by switching between eco and other modes. I was hoping I could program the shift paddles to act as regen paddles, similarly to how mercedes does it. Unfortunately in the X5, hitting a paddle turns on the engine. On another note, can the car be programmed so that the engine recharges the battery to more than 54% Any input is appreciated. cheers |
09-14-2020, 04:48 AM | #2 |
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When I test drove the 45e, I just used the gas and brake pedals to adjust the "regen level". I liked it better than driving a Hyundai Kona Electric where regen is never correct.
You can set the car to charge the battery to 100% while driving. You'll be surprised by the fuel consumption, though ;-) |
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09-14-2020, 04:54 AM | #3 | |
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I live in a very hilly area and the regen is often too weak to hold the car back. I don't like riding the brakes for regen either. You never really know at what point the mechanical brakes start helping (my dealer has no clue). I'm under the impression that the mech brakes jump in before regen is maxed out. |
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09-14-2020, 05:24 AM | #4 |
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The regen braking on the 45e will bring you to a stop. I often just use it to slow me down going down big hills and I end up having to accelerate as the car slows down too much.
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09-14-2020, 05:26 AM | #5 | |
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09-14-2020, 02:08 PM | #6 | |
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I have noticed from motorway driving using the ICE only at around 70mph that I see ~32mpg. When I let the ICE recharge the battery in those same driving conditions, I see ~25mpg In city driving conditions with no charge I can get ~30mpg and The car maintains a charge of around 5% I don't have the data, but if the car in those motorway conditions can recharge 1 mile of electric range for each mile travelled, then it is definetly worth letting the ICE recharge the battery and use that range for the city segment of your trip. Obviously you want to hit it just right so that you run out of charge just as you arrive at your destination where you can charge from a socket. |
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09-14-2020, 02:54 PM | #7 | ||
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For me charging with the ICE only makes sense if you need the charge for pre heating or cooling or you want to drive electric in the city centre. It is not economic it takes more energy than you gain in charge. For your other question: highest regen braking for me was going downhill was in sport mode. It would be a good idea to be able to regulate regenerative braking with the paddles. I only use the paddles when driving in the mountains but I could do it with the stick too. |
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09-14-2020, 03:15 PM | #8 |
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By the way, can you charge the battery when the gasoline engine is idling? Or only when you're driving?
If the efficiency of the gasoline engine is 30% (probably not that high) and the efficiency of charging the battery is 90%, every 9 kWh of chemical energy (roughly one liter of gas) produces 9 * 0.3 * 0.9 = 2.43 kWh into the battery. Charging 20 kWh would then consume about 8.2 liters of gas. |
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09-14-2020, 03:45 PM | #9 | |
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8,2 l 95 E10 wil cost around 11 euro. Fully charging the battery at home takes 24 kWh x 22 cents = 5,3 euro. So it is twice as expensive? |
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09-14-2020, 06:09 PM | #10 | ||
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09-15-2020, 01:56 AM | #11 | |
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It's even "worse" here, 11,6 eur vs. 2,12 eur (for 20 kWh, in the night time). |
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09-15-2020, 02:05 AM | #12 | ||
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I have added a screenshot charging from 2 to 100% took 23 kWh. The 2% is usable battery capacity for driving I don't think it includes the buffer you mentioned. |
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09-15-2020, 02:36 AM | #13 | |
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So a public charging station will be the best option for me. Or charging it up with the ICE |
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09-15-2020, 04:48 AM | #14 | ||
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I would only charge the battery while driving if you need it for pre heating or cooling. Or if you want to drive into city centres on electric. For me it can't be economic to charge the battery with the ICE. Otherwise we have found a way to make free energy. It will always use more energy than can be stored. One thing that could make a difference that is it regenerates more when is sport so you would be doing more one foot driving. If you can use a public charger I would try to use it as much as possible. If for some reason you want a full battery you can charge it while driving but your mpg wil go down seriously. It would be interesting if you could show us how may Km you can drive on a single tank if you do this. So charging to 100%, driving electric and then charging again to 100% while driving. I think that your total driven km will be less than if you drive on gas only. Interesting trial and ideal for you because you can't charge anyway. |
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09-15-2020, 06:25 AM | #15 | |
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Was also planning on using a public charger as much as possbile. There is one around the corner but it costs 0.433 per kwh. And because you said in one of your posts it cost roughly 11 euro to charge on the ICE (at least that is how I read it) it didn't look like much of a difference. When I get the car (hopefully a few weeks from now) I will sure try this. And you mean with using the battery control to charge it back up to 100? I am pretty sure it will drain more than it gains. |
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09-15-2020, 06:45 AM | #16 | ||
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The calculations that are made are quite hypothetical based on the idea of the earlier post. I don't know if the numbers are correct. Anyway from an ecological point of view it would be better to use the public charger. But you would have te leave the car on the street in stead of the safety of your garage. If your car is inside you don't need cooling and heating. It will keep some charge for accelerating anyway. Can't you charge at the office? Ps are you planning on installing a charger in your garage? Often the meters are in the basement. Maybe the electricians can connect it there? Would be the best option. |
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09-15-2020, 08:00 AM | #17 | |
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Based on your numbers which seems doable I got the following: 0.34 per kwh 30kw per 100km average 10L/100km fuel price 1.25 Fuel cost: 12.50 Charge cost: 10.20 So it is fairly cheaper to use public charger. 2 Euro will add up after a time. Yeah the idea is to only charge when needed outside (hopefully 1 or 2 time) and the rest in the garage where it is safe And no charger at the office unfortunately we are already lucky we sometimes get paved parking. You really need an SUV for some parts of the parking Not planning on adding a charger the next few years. Both the apartment and garage are rentals so not really handy to make that cost. |
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