Multi-mode intelligent electronic fuse and control method thereof

Abstract

The invention relates to a multi-mode intelligent electronic fuse and a control method thereof, which are used for controlling the on-off between a power supply and a load module; the fuse comprises a control unit and a control switch, one end of the control switch is connected with the power supply through a first acquisition module, and the other end of the control switch is connected with the load module through a second acquisition module; the first acquisition module acquires a first voltage value between the power supply and the control switch, the second acquisition module acquires a second voltage value and a current value between the control switch and the load module, and the control unit controls the on-off of the control switch according to the first voltage value, the second voltage value and the current value. According to the invention, the fault modes of the multi-mode load module under various working conditions can be covered, accurate and targeted fault response logic is provided, and the circuit failure is effectively reduced.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a multi-mode intelligent electronic fuse and a control method thereof. Background technique [0002] In the field of electric vehicles, as the complexity of electronic controller circuits increases, the requirements for functional safety continue to increase. When dealing with faults such as short circuit and overload, traditional fuses have problems such as inflexible fault judgment, inconvenient fault repair, slow fault action response, and low functional safety level. In some harsh environment application scenarios (such as high temperature environments), fuses There will also be aging, reduced current carrying capacity, and uncontrollable fusing time, which will lead to performance degradation. Therefore, the fuse cannot be configured as the only fault protection measure gradually. [0003] With the improvement of the integration level of the electronic controller circuit, t...

AI Technical Summary

Problems solved by technology

Traditional fuses are no longer competent in these applications, and generally rely on increasing the design margin of the circuit to achieve safety protection, which will not only result in over-design and additional costs, but also fail to identify load faults in different operating modes and complete them efficiently and accurately. The corresponding fault handling mechanism does not have a control strategy for shutdown path detection, which cannot meet the needs of high reliability and high functional safety level design in the field of electric vehicles

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