Check whether the indicator light of the charger is displayed normally, test whether the output voltage of the charger is greater than 48V, and troubleshoot the charger first.
If there is no problem with the charger, it is likely that the fuse of the battery charging port is damaged. You can try to go to a local repair shop to replace the fuse.
If you still can't solve it after replacement, please provide a video showing that the battery cannot be charged, provide the frame number and battery serial number, and contact after-sales.