Signal detection circuit, DC/DC converter, detection method, and storage medium

Abstract

The invention provides a signal detection circuit, a DC / DC converter, a detection method and a storage medium. The signal detection circuit comprises a current detection resistor, a first signal acquisition processing sub-circuit, a second signal acquisition processing sub-circuit and a diagnosis verification unit. The first signal acquisition processing sub-circuit is used for acquiring a first current signal of the current detection resistor; the second signal acquisition processing sub-circuit is used for acquiring a second current signal of the current detection resistor; the diagnosis and verification unit is used for diagnosing failure modes of the current detection resistor, the first signal acquisition and processing sub-circuit and the second signal acquisition and processing sub-circuit according to the first current signal and the second current signal; and the failure mode comprises a signal fault type which needs to be covered by the ASIL D. The signal detection circuit provided by the invention is simple in structure and easy to implement; and according to the signal detection circuit, the DC / DC converter, the detection method and the storage medium provided by the invention, the diagnosis coverage rate of a safety mechanism can be improved at relatively low cost.

Description

technical field [0001] The invention relates to the technical field of automobile safety, in particular to a signal detection circuit, a DC / DC converter, a detection method and a storage medium. Background technique [0002] As the core component of hybrid electric vehicles, the on-board DC / DC converter is used to convert high-voltage direct current into 12V direct current and supply power to 12V loads. see figure 1 , figure 1 Schematic diagram of the structure of the power supply network for electric vehicles. From figure 1 It can be seen from the figure that the electric vehicle power supply network includes a HV voltage network 110, a 12V voltage network 130, and a DC / DC converter 120 for connecting the HV voltage network 110 and the 12V voltage network 130; wherein, the HV voltage network 110 includes a motor 111 and HV battery 112; the load terminal 12V voltage network 130 includes a 12V load 131, a 12V battery 132 and a starter 133 (optional). In new energy vehicl...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the problem of waste of resources in the existing full redundancy scheme in the prior art, and provide a signal detection circuit, DC / DC converter, detection method and storage medium with high diagnostic coverage and lower cost , able to increase the diagnostic coverage of safety mechanisms at a lower cost

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