Current overload: If the current borne by the internal circuit of the electric vehicle exceeds the normal range, the fuse will automatically blow to protect the system safety. This is usually caused by improper use of the electric vehicle or a fault in the circuit.
Charger problem:
Charger output short circuit: If a short circuit occurs inside the charger, the current will increase abnormally, thus blowing the fuse.
Charger damage: A damaged charger may not be able to control the current correctly, causing the fuse to blow.
Battery connection error:
Battery reverse connection: If the positive and negative poles of the battery are connected incorrectly, the current will flow abnormally, thus blowing the fuse.
Battery polarity and voltage mismatch: Mixing batteries of different models or specifications may also cause the fuse to blow.
Load increase: During the use of the electric vehicle, if the load suddenly increases, such as excessive load or driving on a steep mountain road, the current may rise sharply, thus blowing the fuse.
Poor contact: If the contacts at the connection between the fuse and the circuit are in poor contact, the current will be unstable, which may burn the fuse.
Motor winding short circuit: If the winding inside the motor is short-circuited, the current will increase abnormally, thus blowing the fuse.
Other circuit faults: If the Hall element is displaced or damaged, the controller output is short-circuited, etc., it may also cause the fuse to blow.
When the electric vehicle fuse is found to be blown, it is recommended to take the following measures:
Check the charger and battery: confirm whether the charger is working properly, whether the battery is connected correctly and the voltage matches.
Check the load: confirm whether the electric vehicle is overloaded or driving under bad road conditions.
Check the circuit: carefully check whether the contacts at the connection between the fuse and the circuit are in good contact, and whether there is a short circuit fault in the motor winding, controller, etc.
Replace the fuse: If it is confirmed that the fuse is damaged, it should be replaced with a new one in time, and make sure that the new fuse matches the circuit and there is no short circuit.
