09-30-2020, 12:16 PM | #45 |
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The locked capacity is not garbage, it is necessary for the longevity of the lithium ion battery pack and every manufacturer leaves a portion of battery locked for the same purpose (including Tesla). The lower limit in US models on the usable capacity probably means 6-7 miles of electric range loss compared to European spec cars but you are still getting all the PHEV benefits including the federal tax credit, which effectively makes the 45e cheaper than a 40i for those who qualify for the rebate.
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09-30-2020, 12:36 PM | #46 | |
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If the degradation starts first on the locked portion then its fine but if its on the usable you'll notice it first and without technique to start adding kWh from locked its just poor engineering imho.
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09-30-2020, 01:30 PM | #47 | |
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09-30-2020, 02:30 PM | #48 | |
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09-30-2020, 02:50 PM | #49 |
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Tesla limits the usable capacity as well, they just let you choose what percentage of the usable capacity you want to charge to. So when you charge your Tesla to 100% that only charges the usable capacity to 100%, not the entire battery pack. BMW gives you the same option (choose your charge level) too. Every manufacturer limits the usable capacity of the battery pack for the longevity of the lithium ion cells. Tesla no longer officially lists battery sizes but for example Audi e-Tron comes with a 95 kWh battery that has a usable capacity of 83.6 kWh. In theory the larger locked capacity means less degradation over time and faster charging time as you get closer 100% SoC. So that 7 kWh that you pay for but don't get any range for, serves you in other ways.
Last edited by moodyhank82; 09-30-2020 at 02:59 PM.. |
09-30-2020, 06:17 PM | #50 | |
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Overall I don't plan on the keep the car longer than 5 years so that's my time horizon consideration ... |
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09-30-2020, 07:39 PM | #51 | |
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I personally like what Tesla is doing better i.e give the max possible usable capacity and tell the users to only use the 100% charge when driving long distance and charge at 90% or less on a daily basis. This way one has the range if needed but the 45e is a PHEV so it is not solely dependent on EV range to cover long distances on a single charge thus it makes sense that BMW is playing it safe with the conservative usable capacity in my opinion... |
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09-30-2020, 11:07 PM | #52 |
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BMW protects both ends of the battery capacity...neither letting you charge to full nor discharge to empty. So 100% is not fully charged, nor is zero fully discharged. The percentage shown is the useable amount, not the whole amount.
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10-01-2020, 12:21 AM | #53 |
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10-01-2020, 11:03 AM | #54 |
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What about i series? They could be so far ahead if they wouldn't drop this project. Its funny to see Germans trying to catch up with Tesla but unfortunately its over.
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10-01-2020, 03:04 PM | #55 | |
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Would be nice to have that capability with 45e...
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10-01-2020, 03:29 PM | #56 | |
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Elon Musk explains the reason for the recommended daily charge level being less than 100% as being able to use regen and be more efficient: |
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10-01-2020, 03:37 PM | #57 |
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That I agree..
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10-01-2020, 09:18 PM | #58 |
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FWIW, on the i3, if the battery is full, instead of regen, the computer will blend in the hydraulic brakes in a seamless manner, giving you the simulation of regen deceleration. I'm sure they could do the same on the X5, but I don't know if they do. It's fairly easy once the vehicle has some miles on it...on the i3, since you can generally drive it with one pedal, if it does need to activate the brakes automatically, you can generally hear it because there is often a little rust on the rotors from limited use. My driveway is fairly steep, so it will need to use the brakes instead of regen when I leave if the battery is 'full'. Those with more miles on their X5 might be able to tell, but since it does not really support single pedal driving like the BEV i3, some actual braking will probably keep the rotors clean, and thus, likely quiet.
FWIW, the regeneration on the i3 is strong enough so that the computer will turn the brake lights above a certain point. |
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02-19-2021, 04:39 PM | #59 | |
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02-19-2021, 11:11 PM | #60 | |
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are you misunderstanding what BATTERY CONTROL is? BATTERY CONTROL does not determine usable capacity. It determines the battery charge level while the car is moving, not when plugged in (moodyhank82 missed this important distinction). with BATTERY CONTROL default at 80%, for example, you are telling the running car to charge the battery to 80% of 17kWh (13.6kWh). the reason why they gave us control of this particular setting is because the ICE uses more fuel during "mobile charging", and we can determine when it's best to utilize its efficiency (or let the car smarts do it while navigating in HYBRID ECO PRO or ADAPTIVE modes). when using the plug-in charger, it always charges the battery to 100% (17kWh); there is no option to choose a different charge level**. what you may not completely understand is that you've been charging to 100% usable capacity this whole time when using your plug-in charger, and since it's only 71% of total capacity, it's completely safe. **you may be able to choose your charge level while plugged in if your charger has that feature. |
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02-20-2021, 10:22 AM | #61 | |
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02-20-2021, 02:07 PM | #62 |
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Hey guys, is that the same for EU-models? Are we also using 17kwh? I think not. I am charging my car through BMW wall unit and I have placed a meter before that unit. From empty to full it uses 24kwh
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02-20-2021, 02:16 PM | #63 |
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It's 21.something here.. the rest is wasted in the charger (and battery). My BMW reports up to 26 kWh per charge.
Last edited by biterror; 02-20-2021 at 02:17 PM.. Reason: added info |
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02-20-2021, 02:48 PM | #65 |
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How does “your BMW” report “up to 26 kWh”? Where do you see this number? As far as I know the only way to see how many kWh it takes to charge the hybrid battery from zero to full is to use a kWh meter.
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02-20-2021, 10:46 PM | #66 | |
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It shows the electrice driven miles and kWh for each charge. Yesterday (gisteren). I have driven almost 100 km electric. Leaving home 100% and charged 43% on a public charger on location. More than 60% highway 125 km/h on ACC. BMW advices against the use of volt meters but you but some home charging systems will also show. Last edited by X5 45e; 02-20-2021 at 10:51 PM.. |
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