Search found 1950 matches

by e-beach
Feb 17, 2018 12:33 am
Forum: Battery Technology
Topic: Help me build 6s4p 18650 pack.
Replies: 2
Views: 122

Re: Help me build 6s4p 18650 pack.

A balance charger for 6s is fine. It is not complicated. First connect all your 4 parallel cells together to make a larger battery from your 4 small batteries and then wire them like it is shown here. http://blog.lincomatic.com/?p=1725 But instead of 1p, you will have 4p. Just take precautions not t...
by e-beach
Feb 16, 2018 11:30 pm
Forum: E-Bike Technical
Topic: Is this controller salvagable?
Replies: 7
Views: 105

Re: Is this controller salvagable?

If you re-solder on the back side the wires may not fit through the holes provided to them to exit the controller board. You probably need to re-solder them from the top as they were before.

:D
by e-beach
Feb 16, 2018 9:23 pm
Forum: E-Bike Technical
Topic: Is this controller salvagable?
Replies: 7
Views: 105

Re: Is this controller salvagable?

If the controller doesn't work try re-soldering the wires and see if the controller works. If it does not work then you blew something else like a fets or caps or resistors. If it doesn't work after rewiring then just purchase another one and consider learning how to repair your old one. The cost re...
by e-beach
Feb 16, 2018 7:17 pm
Forum: Battery Technology
Topic: Series wired battery gone wrong?
Replies: 5
Views: 90

Re: Series wired battery gone wrong?

I am seeing the same thing as Major. If you are exiting one half of your pack with a negative cable, you need to go to a positive terminal or you have an improper series.

:D
by e-beach
Feb 16, 2018 6:25 pm
Forum: E-Bike Technical
Topic: Is this controller salvagable?
Replies: 7
Views: 105

Re: Is this controller salvagable?

Yes it is possible to rewire a controller if you have a very hot soldering iron. But lets start from the beginning. Does the controller work like normal now?

:D
by e-beach
Feb 16, 2018 5:15 pm
Forum: Battery Technology
Topic: BMS inside a sealed case
Replies: 4
Views: 87

Re: BMS inside a sealed case

I really depends on how you ride and charger your pack combined with the ambient temperature you are riding in. If the heat generated by your riding style and slow charging doesn't warm up your pack much, then you will be ok. If you ride hard and fast charge and live in a hot place, then you might g...
by e-beach
Feb 15, 2018 11:43 pm
Forum: Items Wanted
Topic: Anyone want to send me free dead 18650 cells?
Replies: 24
Views: 254

Re: Anyone want to send me free dead 18650 cells?

Well, I was a bit surprised to see all those 18650's stacked in a pile in your box, but so long as they didn't short and are safely stored now. As far as I understand mailing used 18650's is not dangerous or a crime. Properly packaged and labeled is all that is needed. As far as draining 18650's bef...
by e-beach
Feb 15, 2018 11:37 pm
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 621

Re: Melting wires

Or, Anderson's are just overrated, which is my opinion. Anybody who has worked with them knows that they are a pain in the ars to work with. And they are not any better then inexpensive bullet connectors soldered to the wire and then shrink tubed for insulation.

:D
by e-beach
Feb 14, 2018 6:30 pm
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 621

Re: Melting wires

Dang LPF now you are going to get everybody to rewire all their bikes! :lol: However I am still going to solder because I have never had a crimp and soldered connector break off. However, I useally remove the cheap plastic insulator at the end of the connector, solder, then crimp and cover with a go...
by e-beach
Feb 14, 2018 6:05 pm
Forum: Items Wanted
Topic: Anyone want to send me free dead 18650 cells?
Replies: 24
Views: 254

Re: Anyone want to send me free dead 18650 cells?

Nice job. Some of them might still be good.

:D
by e-beach
Feb 14, 2018 11:50 am
Forum: E-Vehicles General Discussion
Topic: Help me build my new E-kart to go 60+mph
Replies: 3
Views: 69

Re: Help me build my new E-kart to go 60+mph

Ok, but before you start ordering parts, let me ask you a few questions. How do you know your cart can go 60mph and not break apart? Can your suspension and tires take the speed? Also, if it were me, before I bought any parts I would reverse engineer from the wheels up. Kind of like this. I would fi...
by e-beach
Feb 14, 2018 11:34 am
Forum: E-Bike General Discussion
Topic: Trek Retrofit
Replies: 23
Views: 633

Re: Trek Retrofit

Very familiar looking bike you got there. This is mine with a rear Yescom kit and a EM3EV triangle bag that houses (2) 6S 16AH lipos and the controller. It's been solid so far with just over 100 miles on it.trek4500_ebike.jpg These frames definitely have a lot of triangle space for batteries etc, a...
by e-beach
Feb 14, 2018 11:21 am
Forum: E-Bike General Discussion
Topic: Trek Retrofit
Replies: 23
Views: 633

Re: Trek Retrofit

@ Dogman, Thanks! ....Ummm, which picture?

:D
by e-beach
Feb 14, 2018 10:31 am
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 621

Re: Melting wires

@ WarisOver, How many amps do you think you were pulling through your connector?

Oh, and what gauge are/were your burnt wires?

:D
by e-beach
Feb 13, 2018 11:18 pm
Forum: E-Bike General Discussion
Topic: Trek Retrofit
Replies: 23
Views: 633

Re: Trek Retrofit

I think, if you can find a good suspension fork for your trek 800 you should go for it. I found the stock fork on my my old Trek 800 had a rake that made the bike unstable. It went straight well, but didn't corner well. I wiped out on it multiple times before I went to my Liahona. That included a fr...
by e-beach
Feb 13, 2018 10:09 pm
Forum: E-Bike General Discussion
Topic: Trek Retrofit
Replies: 23
Views: 633

Re: Trek Retrofit

Ok, I got sidetracked. My bike is up and running so I took a break and started working on the classical guitar that has been sitting in my closet for 10 years. It didn't have any frets or nut or bridge, but it still had the fret material that I bought for it 10 years ago. I will have to get a nut an...
by e-beach
Feb 13, 2018 9:39 pm
Forum: E-Vehicles General Discussion
Topic: Help me build my new E-kart to go 60+mph
Replies: 3
Views: 69

Re: Help me build my new E-kart to go 60+mph

The basics are: Volts = Speed Amps = Torque Watts (watt hours) = range You didn't give us all the specifics. How heavy is your cart with you in it? What is your set-up like? DD? Gearing? The track you run at. Pictures would be very helpful. My guess is that you need to go to 72v or higher. RC batter...
by e-beach
Feb 13, 2018 9:31 pm
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 621

Re: Melting wires

Solder melts at about 370°F (188°C) If your connectors are that hot, you have a problem. And yes, solder can harden a bit of the wire, but lo less then the crimp. Wires often fray at the end of a crimp thereby lessening the conductive capability of wire. I have seen that more often then with soldere...
by e-beach
Feb 13, 2018 8:53 pm
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 621

Re: Melting wires

I don't know why people relay on crimps anyway. It is such a spotty connection style. Solder it! Even if it is crimped I solder it to make sure.

:D
by e-beach
Feb 13, 2018 4:51 pm
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 621

Re: Melting wires

Like AW, my first thought is a poor connection. I would also check the connectors and crimping. My second guess is that the yellow wire was made of better copper. Just a better wire. My third thought is if your phase is off somewhere, or maybe you have a week fet or something that is putting more st...
by e-beach
Feb 12, 2018 10:14 pm
Forum: Items Wanted
Topic: Anyone want to send me free dead 18650 cells?
Replies: 24
Views: 254

Re: Anyone want to send me free dead 18650 cells?

Last fall I gave over 100 dead 18650's to the local e-waist drop-off....Sorry. Do you have any laptop repair places around town? They are the ones that I would call and see if they want to get rid of their waist laptop batteries. And BTW. Make sure that wooden box is heavily glued-up because that pa...
by e-beach
Feb 10, 2018 9:23 pm
Forum: Alternative Energy
Topic: 4S LiFePO4 as a 12V system
Replies: 12
Views: 237

Re: 4S LiFePO4 as a 12V system

This company claims to adjust the bms to suit certain needs.

http://bestechpower.com/128v4spcmbmspcb ... 138V1.html

:D
by e-beach
Feb 10, 2018 12:43 pm
Forum: Alternative Energy
Topic: 4S LiFePO4 as a 12V system
Replies: 12
Views: 237

Re: 4S LiFePO4 as a 12V system

Sounded like you pounded your Headways! :lol: I will be moving into the 12000 mile range on my 12s 1p 15a Headway pack sometime in late March or early April. They do however sagggggggg on the hills now. But that gives me an excuse to actually peddle. I was thinking about a "hybrid" Li-ion/Li-Polymer...
by e-beach
Feb 10, 2018 12:10 pm
Forum: E-Bike General Discussion
Topic: Recommendations on first e-bike upgrade
Replies: 46
Views: 853

Re: Recommendations on first e-bike upgrade

..... HWBS sensors because the $6 brake levers look stupid :) .....And now I have to wait two weeks for em3ev to come back from chinese new year holidays! :lol: The real problem with the cheep Chinese e-break levers are that the threads on the cable barrel adjustment knob always seem to strip in ju...
by e-beach
Feb 09, 2018 12:18 am
Forum: E-Bike General Discussion
Topic: individual cell vs. putting smaller battery packs together
Replies: 4
Views: 172

Re: individual cell vs. putting smaller battery packs together

Ok. If all your 18650 batteries are new. And they are all have the same "C" rating. And they all have the charge value (3.4v or something close) then you should be able to combine them with out much problem.

If the cells have different "C" ratings, you might end up with problems.

:D