Battery charging

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Blaktop1

Battery charging

Postby Blaktop1 » Tue Nov 18, 2014 8:42 am

I have an Optimate charger, and read somewhere that they can be used through the 12v socket on the bike with the appropriate lead, I have not got this as yet, or can it be used as I had it connected with the Triumph direct to the battery with the fused lead supplied. Or have I got to get the BMW charger.

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Galactic Greyhound
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Re: Battery charging

Postby Galactic Greyhound » Tue Nov 18, 2014 11:07 am

Hi Blaktop1,

I think that your 2007 R1200RT is fitted with the CANBUS electrical system.

You can only charge through the 12v socket on the bike without using a CANBUS enabled or BMW charger as long as the bike does NOT have a CANBUS electrical system.

If the bike has a CANBUS system and you don't have the CANBUS/BMW charger you need to connect your charger directly to the battery. Most charger manufacturers supply a lead to do this which is fitted with a connector which your charger plugs into for quick, convenient and safe connection.

A fuse should be fitted in the charging lead for electrical safety and this is usually incorporated in the lead supplied by the charger manufacturer.
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" onclick="window.open(this.href);return false; - It works!

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P-K
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Re: Battery charging

Postby P-K » Tue Nov 18, 2014 4:08 pm

There is actually a way Ced.

I have an 08 plate R1200GS and with a cheap microprocessor controlled charger (Aldi - not CAN bus) - this works.
  • Ignition off
  • Plug the charger into the aux socket
  • turn on the ignition - let it go through all its initialisation checks.
  • turn on the charger
  • turn off the ignition
The CAN bus will spot current flow and will keep the socket alive until the battery is charged.

What the system, or a Non CAN bus charger Won't let you do is to use this method for a permanent trickle charger - which most CAN bus chargers will allow.

Try it. It works.
Phil,
''93 R100GSPD : '17 R9T Urban G/S : '12 R1200R
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goldenoldy
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Re: Battery charging

Postby goldenoldy » Tue Nov 18, 2014 4:39 pm

My 05 Rt has two flying leads straight from the battery and connects to the Oxford Optimate I use.I think the leads actually came with the charger.
Brian

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Galactic Greyhound
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Re: Battery charging

Postby Galactic Greyhound » Tue Nov 18, 2014 6:11 pm

There is actually a way Ced.

I have an 08 plate R1200GS and with a cheap microprocessor controlled charger (Aldi - not CAN bus) - this works.
  • Ignition off
  • Plug the charger into the aux socket
  • turn on the ignition - let it go through all its initialisation checks.
  • turn on the charger
  • turn off the ignition
The CAN bus will spot current flow and will keep the socket alive until the battery is charged.

What the system, or a Non CAN bus charger Won't let you do is to use this method for a permanent trickle charger - which most CAN bus chargers will allow.

Try it. It works.
Thanks Phil - that is interesting!
I also have the cheap microprocessor Aldi charger (Auto XS which is actually the global CPL2054 charger).
It's a great little charger and terrific value for money.
My R1100RT is not CANbus so I just use it on the dash power socket.

This charger also does discharge cycles when the battery is fully charged or when it is trying to recover a battery.
Using it the CANbus system; will the CANbus then only allow the charger to fully charge the battery and then, when the charger goes into a discharge cycle, the CANbus will shut off the socket or will the CANbus keep it connected? :-k
Not having CANbus I can't experiment with this!
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" onclick="window.open(this.href);return false; - It works!

Blaktop1

Re: Battery charging

Postby Blaktop1 » Tue Nov 18, 2014 6:55 pm

So as I said in my post, I have the relevant lead with inline fuse for the Optimate charger.

Am I correct in presuming that having the optimate lead fitted directly to the battery with the ignition of to charge the battery will have no adverse effect on the electrical system and alarm.

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Re: Battery charging

Postby Mike D » Tue Nov 18, 2014 7:00 pm

Am I correct in presuming that having the optimate lead fitted directly to the battery with the ignition of to charge the battery will have no adverse effect on the electrical system and alarm.
Correct.

Mike

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P-K
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Re: Battery charging

Postby P-K » Tue Nov 18, 2014 7:53 pm

[ snip ] ... will the CANbus then only allow the charger to fully charge the battery and then, when the charger goes into a discharge cycle, the CANbus will shut off the socket ... ...
Yes Ced it does.
When the battery is up to charge the Charger turns off.
The time between that and the discharge cycle is enough for the CAN bus to turn off the socket - and off it then stays.
Phil,
''93 R100GSPD : '17 R9T Urban G/S : '12 R1200R
Site Administrator, Assistant Webmaster and Official Club Tweeter @BMRidersClub

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P-K
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Re: Battery charging

Postby P-K » Tue Nov 18, 2014 8:13 pm

Oh and Ced -

I've also found that this really only works if the bike battery is well down on charge.

I suspect the CAN bus monitoring of reverse current (ie into the socket instead of out of the socket - which would be the norm for powering a device)
is poor on low current.
It can spot this when the bike battery is well down, but not when its a trickle.

Lastly - this feature isn't documented in any of the manuals.
Perhaps its a bit flakey and BMW don't want to put in the extra to finalise the feature.
Phil,
''93 R100GSPD : '17 R9T Urban G/S : '12 R1200R
Site Administrator, Assistant Webmaster and Official Club Tweeter @BMRidersClub

goldenoldy
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Re: Battery charging

Postby goldenoldy » Tue Nov 18, 2014 8:22 pm

Am I correct in presuming that having the optimate lead fitted directly to the battery with the ignition of to charge the battery will have no adverse effect on the electrical system and alarm.
Correct.

Mike
+1, I've used it on this bike for two years now with no issues.
Brian

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Galactic Greyhound
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Re: Battery charging

Postby Galactic Greyhound » Tue Nov 18, 2014 8:47 pm

Thanks for that extra info Phil! =D> :grin:
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" onclick="window.open(this.href);return false; - It works!


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