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Question about using a switch on the over v and under v input to disable regen/assist.

Normally these are pulled to ground to give full functionality.

If I use a simple on/off push button switch to break connection to ground, will that be enough to stop regen and assist when needed, and when I press the button again to make the connection pull to ground it would re-enable it?

The reason I ask is Peter mentioned using a momentary switch and I'm not sure if I should use a momentary switch or an on/off switch.
Here is the post he mentioned using a momentary switch and tapping it quickly.
http://www.insightcentral.net/forums/modifications-technical-issues/22888-mini-bcm-interceptor-2.html#post242032

My thinking is that if you used a momentary switch, when you hold it pressed, it would enable assist or regen, and as soon as you stopped pressing the switch it would break the connection to ground and disable regen or assist.
 

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Discussion Starter #62
The post you quoted was for a specific idea/function that someone wanted.

You should use micro locking switches for the standard BCM interceptor software. (Not momentary) But you can program it how you want.

There is a short soft delay (spool up/down) when you activate/deactivate the switches.
So if you disable regen (flip the switch) then IIRC regen fades away over a few seconds.

And vice versa/ditto for enabling it or assist.
 

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If anyone is building this here are the links to most of the parts I recently ordered. I just built my interceptor and it works. Even though there was a parts list, it wasn't 100% accurate and some of the parts were obsolete and out of stock.

Took me quite a long time to figure out the parts I needed, especially the RS-422 chips, you can order a cheaper in stock alternative.

https://www.mouser.com/Search/ProductDetail.aspx?R=ISL81487EIPZvirtualkey57760000virtualkey968-ISL81487EIPZ

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https://www.mouser.com/Search/ProductDetail.aspx?R=15-29-1025virtualkey53810000virtualkey538-15-29-1025

https://www.mouser.com/Search/ProductDetail.aspx?R=RXEF010virtualkey65000000virtualkey650-RXEF010

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https://www.mouser.com/Search/ProductDetail.aspx?R=ECA-1AM101Bvirtualkey66720000virtualkey667-ECA-1AM101B

https://www.mouser.com/Search/ProductDetail.aspx?R=A104K15X7RF5UAAvirtualkey59420000virtualkey594-A104K15X7RF5UAA

https://www.mouser.com/Search/ProductDetail.aspx?R=MF1/4DC1001Fvirtualkey66000000virtualkey660-MF1/4DC1001F

https://www.mouser.com/Search/ProductDetail.aspx?R=1-2199298-2virtualkey58890000virtualkey571-1-2199298-2

https://www.mouser.com/Search/ProductDetail.aspx?R=M20-9730246virtualkey57420000virtualkey855-M20-9730246

https://www.mouser.com/Search/ProductDetail.aspx?R=22-28-4160virtualkey53810000virtualkey538-22-28-4160
 

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....The Mini BCM Interceptor can be used by people who don't want the full combined pcb and who have there own BMS/FOOLER/CHARGER CONTROLLER ETC [emphasis added]....
Anyone know what the "full combined pcb" is? Is/was there another BCM interceptor, perhaps something with more functionality?
 

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Discussion Starter #68
Last two BCM Interceptors & BCM Foolers

I have two built BCM Interceptors and two BCM foolers left.
First come first served if anyone wants one. e-mail me.

That's it all gone, finished. No blank pcb's left, no nothing.

I won't be buying more for some time, if ever, as the MOQ is likely to be at least 50 pcbs of each for me to make it worthwhile.

It's onto the BCM Replacer after that where possible..
 

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Has anyone found the typical current draw from the +5v line? Trying to determine an appropriate fuse for this.
 

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Discussion Starter #70
It has a 100ma polyfuse on the BCM Interceptor board so an external one is not needed.
The current draw is miniscule anyway..
 

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Discussion Starter #71 (Edited)
'Mini BCM Interceptor' Source Code.....

The 'Mini BCM Interceptor' has been a useful device to help with Lithium integration over the years, and still has a place for minimal installations. :)

I have published the source code before on this thread, but I have just tidied it up and added a few more comments.
This should help those who have gone down this route tune it for their particular setup.

The source is thoroughly commented and mainly self explanatory if you are used to programming, especially with BASIC.
I choose the PIC12F683 chip deliberately years ago, as that chip is supported by the 'Pic-Basic Pro compiler' free edition.
Owners can download the compiler software from the link and tinker with it for their own use. (Please post details of what you do and your results experiences!)

ME Labs Online Store: PBP 3.1 Student Edition (Free Download)

The attached source code and hex has one change from earlier versions in that..

It sends a fake 25C battery temperature for maximum IMA performance only when the battery temperature is below 25C. Above that is sends the actual temperature.
This means the MCM and OBDIIC&C etc can see the actual temperature once it gets above your faked level.

This link to my original post in this thread explains the functionality/purpose of the device with schematics etc.

https://www.insightcentral.net/forums/234713-post1.html

For those now wanting to go down the 'BCM Replacer' route I still have a few (Mini BCM Interceptor & BCM Fooler PCBs) available.
Note the source code formatting is designed for the 'Picbasic-Pro' compiler 'Micro Code Studio' viewer/editor, it will look weird/broken spacing in Notepad..
 

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19 or 20 bars only

Since I dont see any reference to this on the thread, I will just ask.
Installed separate switches for pin 1 and 2. Pin 4 is the common on both switches.
Pin 1 and 2 enabled via pin 4... 19 bars assist and regen.
Pin 1 disabled .....20 bars no regen.
Pin 2 disabled .....20 bars no assist.
Pin 1 and 2 disabled .... 20 bars no assist or regen.

Original post mentioned
P1 20 bars regen disabled
P2 0 bars assist disabled forced charge
p1 and p2 4 bars assist and regen disabled

Anyone know if there was a change since original post?
I am sure of the simple wiring.
 

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Discussion Starter #73
The soc bars do not respond instantly..

It can take some time for the bars to drop down from 20 to 0, like a minute or so at least..
and vice versa.

Drive it around and see if they respond.
 

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Discussion Starter #75
Anyone else notice the SOC bars do not respond, but that assist/regen is disabled as expected, when you activate the BCM Interceptor control inputs?
 

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Discussion Starter #76 (Edited)
Slight changes..

I've just updated the source code post a few below this with new code in a zip file.

This has the voltage limit routines included, so you can set program constants for your maximum and minimum pack voltages.
If the pack goes above/below your values then regen/assist is disabled as appropriate. This might help lithium converters.

I also changed the fake temperature constant so you can use 25C as 25C instead of having to use a value offset by 32, i.e. 57 = 25C. ;)

Comments and ideas welcome as usual.
Note these changes are untested as I don't have a BCM Interceptor in my car..
 

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I ran the car about min in each condition. Results same as before.
Pin 1 and 2 enabled via pin 4... 19 bars assist and regen.
Pin 1 disabled .....20 bars no regen.
Pin 2 disabled .....20 bars no assist.
Pin 1 and 2 disabled .... 20 bars no assist or regen.

Other than the bars incorrect, seems to function ok. Except Pin 2 charges only when braking or decelerating. First post mentions "Forced Charge" Is that what is meant, or forced like during a recal?
I guess I could buy a PIC programmer and check. I plan to do the Brake switch mod and not the Clutch since I can disable via the Pin 1 and 2 switches anyway.
 

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Discussion Starter #78

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I ran the car about min in each condition.
Perhaps with a longer duration in the state the dash SoC display lag will eventually catch up.

It's been my experience there is sometimes a considerable lag between .. a SoC change (from BCM PoV) .. and when that SoC change is reflected in the dash displayed SoC.
 
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