Intelligent fuse

Abstract

The invention provides an intelligent fuse, which comprises a shell, a conductive plate, an arc extinguishing structure, a cutting device and a driving device, and is characterized in that the shell is internally provided with a cavity channel and an arc extinguishing chamber, and the cavity channel is communicated with the arc extinguishing chamber; the current-conducting plate transversely penetrates into the shell, the current-conducting plate partially penetrates between the cavity channel and the arc extinguishing cavity, and the two ends of the current-conducting plate can be connected with an external circuit; the arc extinguishing structure is installed in the arc extinguishing chamber, an arc extinguishing groove is formed in the arc extinguishing structure, and the end portion of the side wall of the arc extinguishing groove abuts against the conductive plate; the cut-off device is movably arranged in the cavity channel and is used for moving from the cavity channel to the arc extinguishing cavity to cut off the conductive plate, and the part, cut off by the cut-off device, of the conductive plate enters the arc extinguishing groove; the driving device is used for receiving an external signal and driving the cut-off device to move from the cavity channel to the arc extinguishing cavity according to the external signal. Therefore, the intelligent fuse can disconnect the circuit according to the external signal so as to improve the adaptability of the intelligent fuse, and the arc extinguishing structure is used for carrying out rapid arc extinguishing on the conductive plate.

Description

technical field [0001] The invention relates to the fields of electric power control and electric vehicles, in particular to an electric intelligent fuse. Background technique [0002] Traditional fuses are based on the heat generated by overcurrent to blow the fuse, thereby disconnecting the circuit that needs to be protected. In various application fields, there are various triggering requirements and extreme application conditions for fuses, which bring great challenges to traditional fuses. Especially in the field of electric vehicles, the normal use of battery packs has a large current and high temperature, which increases the current capacity of traditional fuses. Other problems in battery packs or car driving, such as short circuits and collisions, often occur in a very short period of time. , requires the fuse to respond quickly, and the fault current provided in the circuit at this time is not enough to trigger the traditional fuse in a short time, so it is easy to...

AI Technical Summary

Problems solved by technology

The design of arc extinguishing material at the bottom of the chamber cannot guarantee the state of the arc extinguishing material and sufficient arc extinguishing ability; the design of external parallel fuses cannot guarantee the safe transfer of arc, and it is difficult to control the secondary arc strike

Therefore, these designs cannot fully meet the application requirements in the automotive field with extremely high safety requirements

Furthermore, the application fields of fuses are becoming wider and wider, and corresponding to various voltage and current requirements also makes it difficult for these designs to adapt

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