BMW
X1 / X2
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW X1 (F48) and X2 (F39) Forums General BMW X2 Forum (F39) X2 M35i Battery

Post Reply
 
Thread Tools Search this Thread
      09-23-2019, 06:51 PM   #1
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

X2 M35i Battery

Was curious, snapped a pic.
Attached Images
 
Appreciate 0
      09-23-2019, 08:20 PM   #2
strripedz
Enlisted Member
5
Rep
44
Posts

Drives: X2 F39
Join Date: Nov 2018
Location: Melbourne

iTrader: (0)

Nice, thanks for sharing!
I wish they didn't change the battery position for the newer series.
It makes audio upgrade harder now, have to route the power cable from engine bay to the trunk.
Appreciate 0
      09-23-2019, 09:05 PM   #3
billnchristy
Major
1579
Rep
1,479
Posts

Drives: 2022 M440xi GC
Join Date: Feb 2019
Location: Atlanta

iTrader: (0)

Garage List
Where the hell is it?
Appreciate 0
      09-24-2019, 07:26 AM   #4
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

In engine bay. Red Power cap directly above battery. Super hidden by plastics.
Appreciate 0
      09-24-2019, 07:34 AM   #5
billnchristy
Major
1579
Rep
1,479
Posts

Drives: 2022 M440xi GC
Join Date: Feb 2019
Location: Atlanta

iTrader: (0)

Garage List
Ok thought so but read some were in trunk so I wasn’t sure.
Appreciate 0
      09-24-2019, 10:53 PM   #6
//TMT
Lieutenant
//TMT's Avatar
United_States
129
Rep
419
Posts

Drives: 2020 X2 M35i, 2005 Volvo V50T5
Join Date: Sep 2019
Location: Eastern Massachusetts

iTrader: (0)

Oh, it's an AGM battery! That explains why the car can use regenerative charging and reduce the alternator load. These batteries tolerate deep-cycling.

I wonder if the car occasionally turns the "green" behavior off and charges more normally from time to time, to restore the charge soak. Maybe in colder weather, or whenever the charge drops below some threshold.

Also, the plastic is there to allow cool air to circulate around it instead of engine bay heat. Longer life and better performance. Common approach these days in many designs, actually. Many take in outside air from the cowl or grille.

Last edited by //TMT; 09-24-2019 at 11:03 PM..
Appreciate 0
      09-24-2019, 11:41 PM   #7
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

Regenerative from what source?
Appreciate 0
      09-25-2019, 02:12 AM   #8
danielj
Second Lieutenant
United_States
16
Rep
201
Posts

Drives: 2018 x2
Join Date: Feb 2013
Location: Seattle, WA USA

iTrader: (0)

Quote:
Originally Posted by xcelir8bmw View Post
Regenerative from what source?
Brake energy.
Appreciate 0
      09-25-2019, 07:36 AM   #9
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

Via what mechanism? The Brakes are not tied to electrical system. AGM doesn't have any correlation to that. It is just a better platform. I install Optima Yellow Top AGM batteries into all my cars for years. Not including this, my first, BMW.
Appreciate 0
      09-25-2019, 09:02 AM   #10
billnchristy
Major
1579
Rep
1,479
Posts

Drives: 2022 M440xi GC
Join Date: Feb 2019
Location: Atlanta

iTrader: (0)

Garage List
I believe it’s just a clutched alternator
Appreciate 0
      09-25-2019, 11:08 AM   #11
//TMT
Lieutenant
//TMT's Avatar
United_States
129
Rep
419
Posts

Drives: 2020 X2 M35i, 2005 Volvo V50T5
Join Date: Sep 2019
Location: Eastern Massachusetts

iTrader: (0)

I don't have a solid source but my belief is that the alternator is simply not commanded to generate charging current at all times. When decelerating, the fuel injectors are shut down however, and if the car holds the transmission in gear, the kinetic energy of the car drives the engine, and the alternator is kicked in. This provides the regeneration and slows the car just like extra downshifting would.
Appreciate 0
      09-25-2019, 06:58 PM   #12
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

Hmmm. Interesting theory.
Appreciate 0
      09-26-2019, 03:52 PM   #13
rice_rocket88
Major
No_Country
295
Rep
1,076
Posts

Drives: E60 F48 F39
Join Date: Mar 2019
Location: Boston

iTrader: (0)

What he said... the dumbest thing is that when you just sit and idle the car it won't be charging the battery! (which is now why I only have the tenders/maintainers to top off the cars that have been sitting too long).
Appreciate 0
      09-29-2019, 05:47 PM   #14
strripedz
Enlisted Member
5
Rep
44
Posts

Drives: X2 F39
Join Date: Nov 2018
Location: Melbourne

iTrader: (0)

It must be the E84 chassis.
F39 and F48 are both in the engine bay now.

Quote:
Originally Posted by billnchristy View Post
Ok thought so but read some were in trunk so I wasn’t sure.
Appreciate 0
      08-31-2020, 11:56 AM   #15
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

Now that I have owned the BMW over a year, I've been able to get more comfortable with it.

With that being said, I redid my battery tender wiring. I don't know why I didn't remove the panels in the first place, but it was so much easier this time.

Updated pictures below:
Attached Images
  
Appreciate 1
      08-31-2020, 05:00 PM   #16
//TMT
Lieutenant
//TMT's Avatar
United_States
129
Rep
419
Posts

Drives: 2020 X2 M35i, 2005 Volvo V50T5
Join Date: Sep 2019
Location: Eastern Massachusetts

iTrader: (0)

Very nice! Have you considered sticking the connector through the cowl, up toward the windshield so you don't have to even open the hood to connect?
Appreciate 0
      08-31-2020, 06:00 PM   #17
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

Rain and snow here in Midwest so no. If it were a truck then yes.
Appreciate 0
      09-01-2020, 12:52 PM   #18
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

You did make me think long and hard about this. Researching a waterproof solution that is tucked and installed on vent area. Let me see if I can find an easy solution and then I will share.
Appreciate 0
      09-01-2020, 01:23 PM   #19
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

Thinking about going with something like this:

https://www.amazon.com/Tecmate-Optim...984296&sr=8-62
Appreciate 0
      09-01-2020, 02:03 PM   #20
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

I figured it out. Not too happy though for LHD drivers.

The Wiper is in the way or it would of been perfect!

And I don't want to have a long ass cable going across the front of my windshield.

My routine weekly is to pop the hood, grab the cable from the tender on a shelf, plug it in, close the lid slightly and done.

If I were to use the area listed in green (see pic), I'd just have to pull the cable across the front of the car walking around it to plug it in.

Maybe it's good enough, and if I practiced routine it would be OK, but for me, kinda want to just get out of car, grab cable, plug in and be done with it - and that's not going to happen 'cleanly installed'.

Here is the pic:
Attached Images
 
Appreciate 0
      09-01-2020, 02:18 PM   #21
xcelir8bmw
Major
xcelir8bmw's Avatar
United_States
401
Rep
1,104
Posts

Drives: 2022 BMW M240ix
Join Date: May 2019
Location: AZ

iTrader: (0)

F-It.

I'm doing it.

Ordered: https://www.amazon.com/dp/B01N57XLNS...v_ov_lig_dp_it

We'll see if I like it when I get it.

Also thinking about fender-well hidden way of doing it.

Stay tuned.
Appreciate 0
      09-01-2020, 02:25 PM   #22
//TMT
Lieutenant
//TMT's Avatar
United_States
129
Rep
419
Posts

Drives: 2020 X2 M35i, 2005 Volvo V50T5
Join Date: Sep 2019
Location: Eastern Massachusetts

iTrader: (0)

Yeah, the cowl does look perfect, until you look at it with the hood closed.

I was thinking just thread the pigtail with the connector right through some gap, and leave the wire hanging out in the well, below the wipers. Then fish it out and make the connection when needed. If it needs to be restrained, maybe a little magnet taped to it, that holds it to something like a screw or another magnet, whatever.

Another idea was to go way up to the right - in the corner of the windshield by the driver's side. The cowl wraps up and around that spot, and there's a kind of rubber lip so it's not quite as simple to poke a clean hole.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 05:02 AM.




xbimmers
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST