Recent content by DrKraut

Did anyone have a Problem with the new Elephant App V3? Since i installed it, which asked me for a pin, the charge and discharge fets are disabled and cant be enabled. I can hear some sort of ticking or cklicking from the bms. The BMS effectively doesnt work anymore. Does anybody know why?

Awesome project, I think lots of people are looking for BL power meters! Great work you're doing here :bolt:

Thanks for the input, I still have some headways laying around! But there to heavy for me :mrgreen:

Thanks for the info! Can you specify your charge and discharge method, like Voltage, waiting time and so on. What cell would you recommend to me, it doesn't need to be super high energy. I'm only concerned about longevity under relatively mild conditions. I think about the Sanyo GA or Sam. 35E...

A rough measure always was that I could ride to work, which are 52km total and another 15km until it was empty. As time passed I could barely go to work, so I had to reduce the speed on my way home. And it's getting worse and worse. First measurements took place with a resistive load and a...

What do you mean with termination profile? I think you should be able to trust a manufacturers datasheet, right?

I just found something interesting while digging around: Its about the Sammy 35E cell but anyway really suspicious or strange: From this datasheethttp://downloads.cdn.re-in.de/1400000-1499999/001499572-da-01-de-SAMSUNG_LI_ION_AKKU_18650__3500MAH_10A.pdf Thats the cycle life stats: So you can...

I tought that too at my first design phase for the battery. But I'm limited to the triangle size of my bike. Which just fits about 91 cells plus the controller. So i have to stay high energy density cells, since I can't charge at work.

Hey guys, at the moment i have a 7P13S battery consisting of 91 LG MG1 and after only about 170 cycles it lost already about 40%. I tested it multiple times and its quite disappointing. My setup looks like following: Charge overnight with about 3A or 0,3C. Commuting to work and back, each...

I also ordered 140x Sanyo GAs for a project, everything went flawless. Including very good packaging. Big thumps up for your good service and good prices!

I need to say some good words on tumich. I ordered multiple times from him, everyting went so easy, it couldn't be better. This time i got the cells within 72h !!! Really great service.

I've read the whole thread but i'm not sure about the motor windings. Does the 36V 201 and the 48V 201 have the same torque output? If yes i would run the 36V at 48V battery for more speed and torque

Very fine build ! 8) I also live in Germany and asked myself if you are not scared to ride in cities with such a bike. You know its not legal without a license :lol: ? What's your plan if the cops stop you?

I'm also going to build a vector, and saw the chainline problem. So you use a multi speed freewheel and a chain tensioner, how do you secure the chain so it doesn't change gear itself? BTW very nice build 8)

Thank you all, helped very much :)