The battery output is incorrectly connected. In the lithium battery of an electric vehicle, -B is the output terminal and -C is the input terminal. If the battery output line is connected incorrectly, it will not be able to supply power and the turn signal will not light up. A battery refers to a cup, tank or other container or part of a composite container containing an electrolyte solution and metal electrodes to generate electric current. It is a device capable of converting chemical energy into electrical energy.
Cannot be canceled. Reverse connection of lithium batteries (also called reverse connection batteries) refers to the reverse connection of the positive and negative poles of the lithium battery in the circuit, resulting in poor connection of the battery. This may cause circuit and battery failure. short circuits, heat and even conexplosion sequences, so reverse connection operation is strongly discouraged.