HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 16 posts ] 
Go to page 1, 2  Next
Author Message
PostPosted: Sat Dec 24, 2011 4:10 pm 
Offline

Joined: Thu Nov 04, 2010 3:29 am
Posts: 72
Location: Boulder, CO
I saw this on Facebook from Calfee:

https://www.facebook.com/pages/Calfee-D ... 5283915144

Basically they have a new simple idea, that instead of taking the seat post/battery out, their new charger requires you to just disconnect the rear der cable, it plugs into that cable and charges the system that way. They did not say how much it costs. I am sure a lot of the smart/motivated people on here could duplicate the idea.

Calfee has also show a system that makes their Di2 seat post battery work for the Ultegra wire harness.


Top
 Profile  
 
Posted: Sat Dec 24, 2011 4:10 pm 


Top
  
 
PostPosted: Tue Dec 27, 2011 6:57 am 
Offline

Joined: Sat Apr 03, 2010 11:05 pm
Posts: 326
bigcalves wrote:
I saw this on Facebook from Calfee:

https://www.facebook.com/pages/Calfee-D ... 5283915144" onclick="window.open(this.href);return false;


Calfee has also show a system that makes their Di2 seat post battery work for the Ultegra wire harness.


It uses an Ultegra Di2 "module" that they have engineered. Most likely a chip that tells the brain its the battery via CANbus protocol.


Top
 Profile  
 
PostPosted: Tue Dec 27, 2011 8:19 am 
Offline

Joined: Mon May 24, 2010 4:18 am
Posts: 370
Location: Australia
I just don't know why they don't have an induction charging system and be done with it. Stick the batteries up the guts of the seatpost (carbon) and have a wrap around module that you can wrap around the carbon seatpost when you want to charge the unit. Different seatpost sizes = different width adaptors. Hold unit in with a star nut kind of design with cables exiting somewhere down near the BB (or even out of a water bottle mount via a hollow water bottle mounting screw).


Top
 Profile  
 
PostPosted: Tue Dec 27, 2011 1:16 pm 
Offline

Joined: Sun Oct 12, 2008 5:39 am
Posts: 48
That's not a pain in the ass at all! I'll buy Di2 when they piss off the cables altogether.


Top
 Profile  
 
PostPosted: Tue Dec 27, 2011 8:09 pm 
Offline

Joined: Sat Apr 03, 2010 11:05 pm
Posts: 326
sideshow_bob wrote:
That's not a pain in the ass at all! I'll buy Di2 when they piss off the cables altogether.


That's not for a few years as they will need to "update" it so we can all buy a new group b/c its not compatible!


Top
 Profile  
 
PostPosted: Wed Dec 28, 2011 12:18 am 
Offline

Joined: Sun Oct 16, 2005 11:50 am
Posts: 518
Location: Maui
I don't think you can use induction charging through carbon. It will attenuate the signal at the very least. Different weaves and thicknesses might also interfere with different frequencies. You really need very little space filled only with inert materials to do inductive charging. Plastics or a little bit of skin in the case of medical devices.


Top
 Profile  
 
PostPosted: Wed Dec 28, 2011 12:28 am 
Offline

Joined: Sun May 16, 2010 7:28 pm
Posts: 630
I think the harder problem with induction charging is that you typically need parallel surfaces that are very close in proximity. So a charging mat on the ground 4-6 inches away from the battery is not going to cut it. If you could engineer a sort of dock that would interlock with the downtube, you could probably do it.


Top
 Profile  
 
PostPosted: Wed Dec 28, 2011 1:45 am 
Offline

Joined: Sat Dec 13, 2003 2:25 am
Posts: 4480
Location: Canada
How often do you charge your Di2? I think that about the time I was recharging it, I would be thinking of taking the seatpost to clean it...


Top
 Profile  
 
PostPosted: Wed Jan 04, 2012 7:55 am 
Offline

Joined: Mon Dec 05, 2011 9:02 am
Posts: 18
jeffr wrote:
I don't think you can use induction charging through carbon. It will attenuate the signal at the very least. Different weaves and thicknesses might also interfere with different frequencies. You really need very little space filled only with inert materials to do inductive charging. Plastics or a little bit of skin in the case of medical devices.

Calfee has an in line charger, Calfee's Inline Charger for DA Di2, unplug either your front or rear DA Di2 derailleur and plug our charger into the wiring harness. The only issue I have with this charger is its only a charger, and will not balance the cells, and can actually damage the battery, or possibly cause the battery to catch on fire, as is not uncommon with LIPO cells, but it is a clever idea.


Attachments:
File comment: LIPO charger, not a balance charger
inline charger.jpg
inline charger.jpg [ 12.68 KiB | Viewed 1547 times ]
Top
 Profile  
 
PostPosted: Wed Jan 04, 2012 2:06 pm 
Offline

Joined: Wed Mar 28, 2007 12:49 pm
Posts: 1581
Location: Near Horgen, Switzerland
Not such a great idea. Connectors are designed to provide a reliable lifespan in terms of number of connections / disconnections. And Shimano's connections weren't designed to be taken apart every 5 minutes; for one thing you need a tool to do so. Better IMHO to use a 4mm allen key to undo the seat post...


Top
 Profile  
 
PostPosted: Thu Jan 05, 2012 9:44 am 
Offline

Joined: Tue Nov 01, 2005 9:36 am
Posts: 340
But you don't have to charge the battery every 5 minutes. Unplugging the cable a couple of times in a year should not be a problem. When you're worried with wear of the connectors you can also use the front derailleur.


Top
 Profile  
 
PostPosted: Thu Jan 05, 2012 4:18 pm 
Offline

Joined: Thu Nov 04, 2010 3:29 am
Posts: 72
Location: Boulder, CO
di2diy: aren't you the guy selling a competing system to Calfee's internal battery on Ebay? Nothing wrong with that, but it makes me question your objective criticism. I have talked to Craig Calfee about their system, they are a company with a long history in the business, they have talked directly to Shimano about what they are doing and some key Shimano US people have it on their own bikes.

mrfish, as was pointed out you need to charge the system 3 times a times a year, so the wear and tear is not a major issue. Personally I had my Di2 bike on an airplane 3 times last year and needed to disconnect some cables more for travel than charging. If you use Shimano tool to do it, it is pretty straight forward.


Top
 Profile  
 
PostPosted: Fri Jan 06, 2012 8:35 am 
Offline

Joined: Mon Dec 05, 2011 9:02 am
Posts: 18
bigcalves wrote:
di2diy: aren't you the guy selling a competing system to Calfee's internal battery on Ebay? Nothing wrong with that, but it makes me question your objective criticism. I have talked to Craig Calfee about their system, they are a company with a long history in the business, they have talked directly to Shimano about what they are doing and some key Shimano US people have it on their own bikes.

mrfish, as was pointed out you need to charge the system 3 times a times a year, so the wear and tear is not a major issue. Personally I had my Di2 bike on an airplane 3 times last year and needed to disconnect some cables more for travel than charging. If you use Shimano tool to do it, it is pretty straight forward.


Yes I'm that guy selling on eBay, and no my criticism is not aimed at putting down what Calfee's selling, it's just a fact LIPO and LION batteries can explode if charged with an inexpensive charger like they are using. They should be charged with a balance charger, which requires 3 wires, not just two going to the cell's like they are doing, this can be dangerous, in fact any time you charge these type of batteries, it can be dangerous, including the one I sell with my system with a balance charger. (http://www.rcgroups.com/forums/showthread.php?t=209187) I wouldn't say I'm really competing with Calfee, yes its true I'm selling a similar product, and yes, I also do conversions on non Di2 bikes to place the harness all internal. I do about 4-5 bikes a month for friends, and a few LBS, at a little more than half the cost, I'm doing it because it helps people, not to make money. However I do not have the skill that they have when it comes to painting and touch up, or carbon fiber repair, but thats because I do not cut large holes in the frames like they do, so I don't need the touch up, or repair. I have also talked to Shimano, and to Calfee for that matter. I have also talked to "some key Shimano US people have it on their own bikes" and know that they have had to have frames (SL3) replaced after being done by Calfee, because of the large hole cut in the BB area ruined the frame.... Stuff happens. As I have posted on other forums I think Calfee does a great job, and I think the idea they came up with is clever, but it is less than ideal, in my opinion. What I think is a better way to go if you want to charge the battery without removing it is the way Icarus does it (http://icaruslights.com/batteries/) in fact I like that battery setup more than mine, or Calfee's. Calfee is as you said "a company with a long history in the business" and I seriously doubt that anything that I'm doing, or criticizing will change that. Thanks for your comment.


Last edited by di2diy on Fri Jan 06, 2012 8:50 am, edited 1 time in total.

Top
 Profile  
 
PostPosted: Fri Jan 06, 2012 8:46 am 
Offline

Joined: Sun Oct 16, 2005 11:50 am
Posts: 518
Location: Maui
The charging circuit could be in the battery pack. That picture looks like a standard power supply. I doubt calfee has the technological acumen to reverse engineer the ultegra signaling while not understanding basic properties of lithium batteries. Stranger things have happened but it's odd to assume they're not doing it correctly from what little information is available.


Top
 Profile  
 
Posted: Fri Jan 06, 2012 8:46 am 


Top
  
 
PostPosted: Fri Jan 06, 2012 9:17 am 
Offline

Joined: Mon Dec 05, 2011 9:02 am
Posts: 18
jeffr wrote:
The charging circuit could be in the battery pack. That picture looks like a standard power supply. I doubt calfee has the technological acumen to reverse engineer the ultegra signaling while not understanding basic properties of lithium batteries. Stranger things have happened but it's odd to assume they're not doing it correctly from what little information is available.


Agreed, but it looks just like lithium battery charger I have bought and tested, with Mini Tamiya Plug, only with a Di2 plug... and its true there could be some circuit in the battery pack. As I said all lithium batteries pose a danger when charged, as I also said its just my opinion.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ] 
Go to page 1, 2  Next


Who is online

Users browsing this forum: Baidu [Spider], Bing [Bot], Bogan, Google [Bot], Krull and 32 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Scott Foil Internal Di2 Routing, Internal Battery Questions

in Road

Zigmeister

5

1461

Sat Nov 23, 2013 9:35 pm

Zigmeister View the latest post

There are no new unread posts for this topic. Out of stock - Internal Di2 Batteries

in Road

RexWrecks

8

705

Mon Mar 17, 2014 8:04 pm

carbonLORD View the latest post

There are no new unread posts for this topic. Cervelo S5 internal battery

in Road

cajer

8

568

Sat Aug 09, 2014 12:38 pm

rmerka View the latest post

There are no new unread posts for this topic. Di2 internal wiring, stopping the rattling

in Road

Calnago

9

942

Sun Feb 16, 2014 10:03 am

11.4 View the latest post

There are no new unread posts for this topic. Internal cam skewers with titanium shafts?

in Road

crimsonbadger

9

1332

Sun Jun 29, 2014 2:10 am

landdnl View the latest post


It is currently Sat Oct 25, 2014 10:54 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB