DDL Posted January 13 Share Posted January 13 Hello everyone My Ninebot One Z10 has not been charging for a while now. When the charger is plugged in, a charging animation appears on the display, but the batteries do not accept electricity. The wheel itself works properly, starts, connects via bluetooth and drives properly. I decided to disassemble it to look for the reason. What turned out to be a problem was a loose charging socket, which led to the cables shorting out. The charging socket is located in the wheel lifting handle. The socket itself is soldered on to PCB Which is not protected from the bottom in any way. A piece of steel profile is placed under the socket, which is a reinforcement of the handle for lifting the wheel. A loose socket touched the steel profile and led to a short circuit. The way this has been designed is simply unacceptable. Because of this short circuit, the high voltage from the charger damaged my battery and since then it won't charge. The fuses located on the bottom of the BMS of the battery were definitely damaged. I was able to replace the fuse in the "B" battery and after this treatment this battery started to charge properly. As for the "A" battery, apart from the fuse, most likely one of the mosfets was damaged, because when taking measurements on the "A" battery, the mosfets show me 53V and on the "B" battery they show 0V If I manage to determine something more, I will keep you updated. 1 Quote Link to comment Share on other sites More sharing options...
litewave Posted January 16 Share Posted January 16 On 1/13/2024 at 7:06 AM, DDL said: Hello everyone My Ninebot One Z10 has not been charging for a while now. When the charger is plugged in, a charging animation appears on the display, but the batteries do not accept electricity. The wheel itself works properly, starts, connects via bluetooth and drives properly. I decided to disassemble it to look for the reason. What turned out to be a problem was a loose charging socket, which led to the cables shorting out. The charging socket is located in the wheel lifting handle. The socket itself is soldered on to PCB Which is not protected from the bottom in any way. A piece of steel profile is placed under the socket, which is a reinforcement of the handle for lifting the wheel. A loose socket touched the steel profile and led to a short circuit. The way this has been designed is simply unacceptable. Because of this short circuit, the high voltage from the charger damaged my battery and since then it won't charge. The fuses located on the bottom of the BMS of the battery were definitely damaged. I was able to replace the fuse in the "B" battery and after this treatment this battery started to charge properly. As for the "A" battery, apart from the fuse, most likely one of the mosfets was damaged, because when taking measurements on the "A" battery, the mosfets show me 53V and on the "B" battery they show 0V If I manage to determine something more, I will keep you updated. Thank you so much for sharing this. I will be insulating the socket from the bottom side thanks to your insights. Quote Link to comment Share on other sites More sharing options...
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