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

A technology of DC converter and signal detection, which is applied in the field of automobile safety, can solve problems such as waste of resources, achieve the effects of simple structure, wide application range, and improved diagnostic coverage
CN113295919APending Publication Date: 2021-08-24UNITED AUTOMOTIVE ELECTRONICS SYST
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNITED AUTOMOTIVE ELECTRONICS SYST
Publication Date
2021-08-24

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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.
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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...

Claims

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