Recent content by stepus

Hi, I put the datasheet in the attachment. Suprisingly these teway cells bought on alibaba looks like grade A cells. I have measured capacity at 100A continous discharge and it was 190Ah - cells are 200Ah rated. Also internal resistance of cell is about 0.5mOhm. Pretty good for a price. Ok, so...

Hi, I bought some Lifepo4 200Ah batteries for my FVE project. They will be 16s1p combination. My question is: I have seen some information about compressing pouch cells for higher cycle life and not allow to swelling cell. I also seen this in datasheet for my cell: 循环寿命 25℃0.5C/0.5C 80%...

Hi, so luna do the mod by offseting/ lowering amp sensitivity ? so when you have 180 battery amps then you have 860+ phase amps ? If ratio of batt/phase amps is same (defined by FW) - i have 125 battery and about 600phase and its impossible to give it a full throttle - its going whelee or take...

you shunted XX controler ? or classic X controller as me but to 180A ? I think luna have a modified firmware for controller, so its X controller only with different FW - they increased only battery amps and phase amps is same as X controller ? Battery must be shunted - i see some posts about...

Hi, i have sniffed some communication in bike, and also comunication battery with pc software - there are same commands that are send to battery, and battery will send data. I have about 90% protocol recognised what is what. So now its easy for me send commands via arduino and get response from...

surron controller is programed to speed throttle, you cannot change it. It also bothered me a bit at first, but I got used to it. When I want to start slower and not at full power, I just turn the throttle gradually.

Hi, my friend has the 485 surron converter and can modify config on some FW versions of the batteries, not me. I just plan to connect to 485 and read the data from the BMS and display it on the screen on handlebar. It will show voltage,current, temp, power, calculated consuption and range etc...

having two joysticks/potentiometers is also possible but, it will be hard to control it, when you want to go forward you will need to control both same, a little difference of speed for one wheel will starts to turn :D if your joysticks are in a middle state , you can use some -5V power supply...

Hi, i thing there is none joystick that have this function. I thing you need to do some electronic board for it. You need control two controllers - Speed with signal 0-5V, and direction that is digital pin. So that PCB - can be done with opamps,logic IOs etc. Or with arduino if you can write...

Nice find DOC ! My friend has a SW and RS485 converter from sur-ron as a service man, so he did some digging into config files they give to him with some FW for repairing some BMSs, and findout it can be fully customisable. Reading BMS is possible with every RS485 converter, but writting config...

Hi, yes alternator can be used as a dyno, but its braking power depends on RPMs and current at rotor coil. I thing having a watercooled alternator, and short its phases togeter will work good, and then control braking force only by small current to rotor. Adding some resistive load on output -...

Hi, its not magnets, its iron core to "catch" magnetic field aroud terminal, and direct it through hall sensor. And yes, it will be easier to find similiar material ring, and cut in it larger gap - then i thing it dont need calibration like i do. But we still dont know if stock controller is...

Hi,I did not sniff the communication, but my friend do. I planning to connect to it via arduino, and print on LCD :current,cell voltages, temperatures, etc. BMS can be also reconfigured, my friend has config files where he can do changes and then send it to BMS. He increased current limit in my...

Yes, i offseted flux rings, to lower sensitivity of halls. Bending halls is also possible, but you need to set accurate sensitivity on both halls, and when you bend halls 4th time you can easily broke legs :D or you can put some ferrite rings on halls - it will also lower flux flowing through...

But this is classic sqare wave surron old controller, and its been already depotted earlier in this thread... in this controller there are shunt resistors on photos - also easy to shunt. But more interesting is X controller. I know of one person around which probably shorted fets on X...