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  1. Patriot

    Brake shut off - how important?

    Yeah, I asked an electrician at work, he said is looks like a basic internal spring compression switch. And yes, I bought the cheapy light for about $3-4 from DX at the time, just to get the switch. The cheap light still works without the switch, so I put it on my daughters bike. As far as...
  2. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    fechter, Something just dawned on me. What if I have a bad cell? I say this, because after hooking up the BMS with my new leads to the battery, I now see that my channel 7 and even channel 3 were extremely low. Both around 2.1v. Well, out of pure contempt, I hooked up the charger, and turned...
  3. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    OK, this is what I have done so far. I replace these parts in the following channels. Ch. 7- U102, Q101, and U101. Ch. 8- U102 and Q101. Channel 8 now appears to be normal now. I replaced all three parts in ch.7, and I am still not getting 2.5v at the U102 point. It only says 0.1v. So, I...
  4. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    Mouser parts showed up in the mail today. Well, I installed a new LM431 on channels 7 & 8. After reconnecting, the LED still came on for channel 8. Being stupid, I didn't check it when LM431 was removed, so I can only assume it's the Q101? What next?
  5. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    fechter, I finally got around to ordering some spare parts today. I ordered 6 of each, LM431, TC54, and KSA931. AndyH said he replaced the BD136 for part Q101, but mine came with KSA931YTA originally, so I ordered that instead. I'm assuming it's the same thing. I plasn n just changing out the...
  6. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    ^^^^ Ok, I got some interesting results. I used both my meters. The first was my cheap digital meter. Digital 3.0v - 2.95v actual. 2.5v - 2.22v actual. 1.0v - 1.05v actual. The second was my old tiny pocket analog meter. It can only give me a 0.1v accuracy using the 10v range setting. Analog...
  7. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    Ok, I'll do that first. I'd prefer it, without having to pullout the LM431.
  8. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    fechter, I will connect it again and check all the voltages the way you show. I already know that I'm getting about 3v across the resistor when connected, and the led is lit. All the other cells do not have this, because their LED's are off, as they should be. I'll also do as you recommend...
  9. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    ^^^ Yes, I am reading 3.35v at the contact points of the big blue power resistors. Also, when I connected the lead back up again, I actually measured 2.95v across the resistor itself. I even measured from the resistor to the LED and got about the same. So, current is flowing through the...
  10. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    OK, I checked the large resistor legs on the far end where they connect to the board, right next to the channel lead connections. Here's the voltages I got between them. 1-2 - 3.35v 2-3 - 0.00v 3-4 - 1.82v 5-6 - 3.35v 6-7 - 0.00v 7-8 - 1.83v So, the voltages appeared to have the same pattern...
  11. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    ^^^ I checked the voltages, cells 7,8 & 9 all are at 3.35v by my meter. I kept thinking it may be another flux short from installing the new leads, like I had when first building. but I cleaned with a Q-tip/acetone between the solder points, and there's nothing. Plus, to get the resistor warm...
  12. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    fechter, Thanks for all your help. Now I have another problem I can't figure out. Today I got my BMS setup with a whole new set of channel leads. I eliminated the 17-pin connector, and just decided to go with eyelet terminals for each channel, and hook directly to the cells. Well...
  13. Patriot

    Winterise your E-Bike

    I say build that snow bike up with a 5304/5 in the rear, and 84v of LiFePO.... then go mountain climbing. :mrgreen:
  14. Patriot

    Throttle throttles throttles. Sigh.

    ^^^ I tried a trigger throttle on my bike, but found it to be a real problem. I love the idea, and it felt great. However, no matter how I configured it, the throttle would not work, as it got in the way of my trigger shifter. I can't remount my shifter to a DT setup, because they are integrated...
  15. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    ^^^^UPDATE: As the battery got close to balancing, a couple things started to happen in the last 10-15mins. Most of the channels were close to each other in voltage. However, Channel-15 started lagging behind the rest (though still coming up slowly). Channel-7 started taking off ahead of the...
  16. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    fechter, Today I am trying to charge up my battery, and see where the higher voltages on channel-7 is coming from. Channel 15 seems to lag behind a bit, but not by much. It also flckered a bit while balancing, just like channel-7. I'm thinking it's not my connector now, and must be something...
  17. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    After trying to troubleshoot my bad connection problem today, I noticed the last channel that is flickering was slowly getting brighter, but never quite fully on. When total battery voltage was peaking around 60.2v, I disconnected the battery, and checked individual cell voltages. The...
  18. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    A BETTER CONNECTOR!!! I have discovered a continuous problem with my 17-pin connector between my BMS and battery. There are two channels that tend to go on the fritz, and I believe it is because of bad connection. I clean the pins in the connector, and it'll work for a charge, but then after a...
  19. Patriot

    Continuity/Conductive Grease?

    ^^^ That's what I've been worried about. I think a good cleaning with alcohol or lacquer thinner will have to do.
  20. Patriot

    Continuity/Conductive Grease?

    I have GGoodrums BMS hooked up tyo my 48v/20ah Headway battery. I have been having some problems with cells not balancing properly. I checked all cells, and there doesn't appear to be anything wrong with the cells, or the BMS. I finally nailed it down to bad contacts in the 17-pin connector...
  21. Patriot

    Even Newer 4 to 24-cell Battery Management System (BMS)

    You know, everything with my older BMS (I think the v2.5) seems to be working really well, but I have been having something happen as of late, that has me perplexed. Today I charged it for 7 hrs, and when 15 channels were lit, the last channel got about half way lit, and then about 6 channels...
  22. Patriot

    New MC-E LED light upgrade!!!

    For years I've wanted to build my own airplane. My RC collection just isn't enough to satisfy my desire for flight. Maybe a new Velocity Turbo? For now, I have to finish building my house.
  23. Patriot

    New MC-E LED light upgrade!!!

    I've decided to document my light upgrade for anyone interested. I initially started with two 20w halogen DIY lights, which are powered by my 48v/12v/3v/12v converter. The 3-channel converter is a really nice feature for this bike. My first upgrade was to make myself a CREE R2 light with a...
  24. Patriot

    Getting a 5304 to spin backwards

    That's an interesting idea. If two of the three main phase wires going to the motor are switched, then the motor will run backwards. With all of the hall sensors setup to operate the motor in a certain way, I'm not sure how smooth the motor with run through its range of acceleration. It may...
  25. Patriot

    Who uses CREE MC-E led's for your headlights?

    Your light housing looks kind of odd, and may be problematic in converting to LED. Usually, the LED's require a decent reflector, that is made of some kind of alloy, instead of plastic. Mainly because it requires something to conduct the heat away from the LED, or it will be damaged. Halogen...
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