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by Kristian
Mon Jan 14, 2019 11:20 am
Forum: Technical BMW i3 Discussions
Topic: Precondition batteries without charging
Replies: 11
Views: 6185

Re: Precondition batteries without charging

https://www.youtube.com/watch?v=KNC2LgMB1no Watch this video @ 19:50 The video clearly states that "the i3 is equipped with intelligent heating and cooling system that is engineered to keep the battery in the ideal temp range, thus ensuring the range is not negatively impacted". So, one would have ...
by Kristian
Sat Dec 22, 2018 3:30 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6034

Re: Battery degradation driven by aging, charge cycles and charge current

Hmm... I wonder how my car was able to pull 5.5 kW while preconditioning and at 100% SOC if the heaters were only 3 kW together. That's based on the graph provided by OpenEVSE charger. Anyway, you could always verify if it does attempt to pre-heat the battery by checking the before and after temper...
by Kristian
Sat Dec 22, 2018 2:32 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6034

Re: Battery degradation driven by aging, charge cycles and charge current

Oleksiy wrote:I believe it may depend on the available kW capacity of your charger.
That as well - 2kw cabin heater and 1kw battery heater from a 2.4kw charger!
If only there was a button to just warm the battery or prioritise one requirement over another.
by Kristian
Sat Dec 22, 2018 2:22 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6034

Re: Battery degradation driven by aging, charge cycles and charge current

Battery preconditioning only works with a set departure time and the car is plugged into a charger. Cabin heating will still trigger even if the car is not plugged into a charger. Supposedly for battery preconditioning to work the the departure time needs to be at least 3 hours in the future. By usi...
by Kristian
Thu Dec 20, 2018 5:50 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6034

Re: Battery degradation driven by aging, charge cycles and charge current

How are you measuring the battery temperature?
Using the hidden menu (press and hold the mileage trip reset for 10 seconds, scroll down to unlock, type in sum of 1st 6 or 8 digit of vin, scroll to temperature menu)
There are better instructions possibly on this forum for unlocking the menus
by Kristian
Thu Dec 20, 2018 5:36 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6034

Re: Battery degradation driven by aging, charge cycles and charge current

I've tried to only partially charge the battery before (I use a timer on the socket to control when it starts) with my trickle charger set to 2.4kw and after 3 hours the battery will be nearly fully charged 80% to 100% and the battery will only have increased in temperature by a couple of degrees - ...
by Kristian
Wed Dec 19, 2018 2:05 pm
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6034

Re: Battery degradation driven by aging, charge cycles and charge current

If a lower state of charge is recommended unless extra range required, how can you warm the battery without increasing the SOC?
Is driving with a lower SOC and a cold battery better than a higher SOC with a warm battery?
by Kristian
Wed Dec 05, 2018 1:53 pm
Forum: Technical BMW i3 Discussions
Topic: How do you run the heating or radio without starting the car?
Replies: 3
Views: 2665

Re: How do you run the heating or radio without starting the car?

So it does - I'm sure the radio never used to work.
The heating option Is a bit of a faff but good to know. Used to be a single button on my old 3 series.

Thanks
by Kristian
Tue Dec 04, 2018 11:38 am
Forum: Technical BMW i3 Discussions
Topic: How do you run the heating or radio without starting the car?
Replies: 3
Views: 2665

How do you run the heating or radio without starting the car?

Is there any way to use the radio or heating without pressing stop/start?
by Kristian
Thu Nov 22, 2018 11:33 pm
Forum: Technical BMW i3 Discussions
Topic: Precondition batteries without charging
Replies: 11
Views: 6185

Re: Precondition batteries without charging

The battery heating is only necessary for longer ranges and faster DC charging. The liftime won‘t decrease if you drive with a cold battery. By having a warm battery then in the long term the battery will have gone through less charge/discharge cycles. If you only do low annual mileage then maybe n...

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