Electric vehicle fuse state detection circuit

Abstract

The invention relates to an electric vehicle fuse state detection circuit. Two ends of a motor fuse are connected in parallel to a branch formed by a motor loop state lamp and a motor loop resistor which are mutually connected in series. The motor loop state lamp is quenched when the motor fuse is conducted and is lightened when the motor fuse is fused. In the invention, when the fuse in one loop is conducted, a resistor resistance of a branch where the state lamp is located is greater than a branch where the fuse is located so that a current of the branch where the state lamp is located approaches zero and the state lamp is in a quenching state. After the fuse in the loop is fused, the current is increased so as to lighten the state lamp and then the state lamp is in a lightening state. The state lamp can be uniformly installed on an instrument panel at a handlebar position or be installed on other conspicuous places. When one loop generates a fusing fault, the state lamp in the loop is lightened. A cyclist sees the light and knows that the fuse in the loop has a fault so that the cyclist can determine a fault point.

Description

technical field [0001] The invention belongs to the technical field of fuse state detection for electric vehicle circuits, in particular to a state detection circuit for each fuse of an electric vehicle. Background technique [0002] Many electrical equipment are used in electric vehicles, such as: motors, lamps, instruments, etc., each equipment is powered by batteries, and cables are used to connect each equipment to the battery. In order to improve the safety of electricity consumption, in the power supply circuit of the motor A fuse is connected in series, and a fuse is connected in series in the power supply circuit of the instrument and lamps. Some manufacturers also connect a fuse in series in a series battery pack composed of multiple batteries. When an abnormal current occurs in the motor circuit, the fuse blows to cut off the motor. To protect the safety of the motor, similarly, the circuit of the instrument lamp and the circuit of the battery pack are protected by...

AI Technical Summary

Problems solved by technology

In actual use, it is found that when the fuse in the motor circuit, instrument lamp circuit or battery pack circuit has a fuse failure, the rider can only know that there is a fault, but he cannot clearly know which circuit has the problem, and the electric vehicle must be transported Go to the maintenance station and have the maintenance personnel check each circuit in turn, which is not only very time-consuming and laborious, but also because of the long cable, it is not easy to judge which fuse has a problem

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