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by Joff
Wed Mar 18, 2020 1:40 pm
Forum: Technical BMW i3 Discussions
Topic: Parallel HV Battery for added range.
Replies: 17
Views: 2277

Re: Parallel HV Battery for added range.

I decided to make a quick battery out of cells i already have, just to see what happens, if it throws code, triggers turtle mode or somthing. I used 96 8ah packet cells in series, in two banks of 48 cells with a high amp switch in th middle. They are good for 200 amps but I'm using a 50 amp fuse.
by Joff
Mon Mar 16, 2020 4:34 pm
Forum: Technical BMW i3 Discussions
Topic: Parallel HV Battery for added range.
Replies: 17
Views: 2277

Re: Parallel HV Battery for added range.

Is the state of charge determined by amp flow? and if so, where is it measuring that? Is it measuring voltage to determine state of charge? I don't know the answer. However, the voltage jumps up and down with the propulsive and regenerative loads. The damped voltage wouldn't vary much with charge l...
by Joff
Mon Mar 16, 2020 3:58 pm
Forum: Technical BMW i3 Discussions
Topic: Parallel HV Battery for added range.
Replies: 17
Views: 2277

Re: Parallel HV Battery for added range.

"Fooling the electronics seems daunting. How would regen and battery pack charging work when the main battery pack has 4 times the capacity of the auxiliary battery pack?" Regardless of the auxiliary battery's capacity, it will follow the voltage of cables attached to the main battery. Although that...
by Joff
Mon Mar 16, 2020 8:51 am
Forum: Technical BMW i3 Discussions
Topic: Parallel HV Battery for added range.
Replies: 17
Views: 2277

Parallel HV Battery for added range.

I've looked into the 60ah to 94 ah battery swap. At this time it seems to be more trouble, cost, and down time than I would like. There are frugal leaf owners that have added a second leaf pack to regain a reasonable range. They wire the second pack in to the cables between the main battery and the ...
by Joff
Mon Mar 16, 2020 6:36 am
Forum: Technical BMW i3 Discussions
Topic: Parachute effect, underside of vehicle, undesirable
Replies: 13
Views: 2444

Re: Parachute effect, underside of vehicle, undesirable

I suspect the opening does not create a lot of drag, but I hope one of us will get around to testing a block off panel. BEV owners can appreciate a bit of extra highway range!
by Joff
Fri Feb 14, 2020 8:52 am
Forum: Problems / Troubleshooting
Topic: Seat belt buckle won't latch
Replies: 2
Views: 1141

Re: Seat belt buckle won't latch

I still have this intermittent problem. There is not any fabric or anything else in the way, pressing harder does not make a difference. It is going all the way in. I plan some time to work on it at a later date, and it just works with no issue next time I go to use it.
by Joff
Tue Feb 04, 2020 8:21 pm
Forum: Problems / Troubleshooting
Topic: Heated seat switches off
Replies: 10
Views: 1828

Re: Heated seat switches off

"Aansluiting van de 12V kabel bleek te zwak/te kort en breekt na x keer gebruik" Ist das 12V Kabel im Sitz? Etwas, das ich selbst reparieren kann?
by Joff
Fri Jan 03, 2020 10:48 am
Forum: Suggestions for BMW
Topic: Show charging stations on map
Replies: 4
Views: 861

Re: Show charging stations on map

Thanks! That is just what I thought it should have! I looked before and couldn't find it, needed to do the extra bit of searching that ya only do when you are sure you are missing something.
by Joff
Wed Jan 01, 2020 1:13 pm
Forum: Suggestions for BMW
Topic: Show charging stations on map
Replies: 4
Views: 861

Show charging stations on map

I think it would be nice if you could set the Navigation to always show where the charging stations are. It knows where they are, why not have them show up on the nav screen when you drive by them?
by Joff
Thu Dec 26, 2019 4:45 pm
Forum: Problems / Troubleshooting
Topic: Heated seat switches off
Replies: 10
Views: 1828

Re: Heated seat switches off

When on high, it would get hot and later I would notice it has gone cold and I would look and see the light is out. Pushing the button didn't do any good at this point. More recently I put it at the lowest setting and it continued to work as long as I wanted it to. It got plenty warm. I can live wit...

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