The Xiaomi m365 electric scooter is driving, but it has no power.

jarroQ wrote:

keseszel wrote:

Should I also have to be interested in him? This F2 .. Mine also has similar symptoms, I was also tired of them here. I ended up driving with an extra lamp.

Replace the fuse F2 and after the problem. After inserting the jumper at the smallest overload of the 5V converter, it becomes dead.

As for the engine speed, it is unstable if the engine is not loaded (only at higher engine revolutions).
The PID controller is often unable to maintain the set speed and in the application you may see the wrong or unstable speed.

If you have damaged F2, it also affects the voltage of the hall sensors in the engine. If it is unstable or much lower than recommended, the max speed will be lower.

In new versions, they give a jumper, i.e. a 0 ohm resistor. Go ahead and you can bridge the fuse.

Yes they give the jumper. In version 3.1, there is no jumper, but a straight path from the converter coil is flown. Is that a good solution? Certainly not for the customer.

jarroQ wrote:

Yes they give the jumper. In version 3.1, there is no jumper, but a straight path from the converter coil is flown. Is that a good solution? Certainly not for the customer.

If so, they must have come to the point that it is more cost effective and less breakdown than a polymer fuse that conducts less current over time. The 0 ohm resistor itself can withstand a very high load on the 5v line, so in my opinion it is unnecessary.

There was a fuse, no fuse ... Suddenly such a change .. Interesting fact .. I feel a conspiracy

Sorry for the long lack of response, I did not have time to test. After the F2 fuse is repaired, there is no more jerking, but no power. Here are the observations:
- battery voltage in idle state, full charge: 41V
- when accelerating it drops to approx. 38V (probably normal), power consumption approx. 275W
- accelerates poorly 18 km / h, finally 20 km / h (normally it was calmly 24 km / h and faster). It can barely go up a slight hill.
- after acceleration, power consumption approx. 190-200W (I weigh 78 kg)
- no additional mechanical resistance
The meter reading on this controller - 1000 km. Interestingly, I had the same problem earlier with +/- the same meter reading on the original controller, I bought a stimulant (about 500 km) and took it off with my hand. Oh, the power consumption is rather normal - I did 4 km and "half a dot" disappeared.
Mosfets are not short-circuited, but it is difficult to say if they are all functional. But the engine runs smoothly - just like a fully discharged battery.
I have an eye on such a driver at a good price, but ideally if it could be fixed more easily ... I will be grateful for your help.

kangyooni wrote:

- accelerates poorly 18 km / h, finally 20 km / h (normally it was calmly 24 km / h and faster). It can barely go up a slight hill.

We still haven't found out what version of DRV software you have. One of my colleagues has already written about the speed limit to 20 km / h on new soft cars.
If you connected the scooter to the Xiaomi application, the scooter has certainly been updated and hence your problem.

I did not use the Xiaomi app, only some unofficial m365tools, so the soft should stay, with the rest of the speed limitation, it should continue to accelerate relatively quickly. What is showing to me:
ESC Firmware: 0138 -> from what I can see, the best soft
BLE Firmware: 0072
BMS Firmware: 0115

kangyooni wrote:

ESC Firmware: 0138 -> from what I can see, the best soft

I rode it until I changed the dashboard to the one from PRO. This is not the fault of the firmware.
Measure the 5V power supply with the engine stopped and running. Measure what voltage value is supplied by the lever to the controller as it is set to 100%.