System And Method For Performing Diagnostics On A DC-DC Converter

    公开(公告)号:US20190043276A1

    公开(公告)日:2019-02-07

    申请号:US15668108

    申请日:2017-08-03

    Abstract: In an example, a vehicle diagnostic system is disclosed. The vehicle diagnostic system includes a first DC-DC converter having an input and an output and a second DC-DC converter having an input and an output. The output of the first DC-DC converter is connected to the input of the second DC-DC converter at a first node, and the output of the second DC-DC converter is connected to the input of the first DC-DC converter at a second node. The vehicle diagnostic system includes a battery connected to a vehicle load and the first node and a redundant power source connected to the second node. The vehicle diagnostic system includes a control module that is configured to initiate operation of the first DC-DC converter and the second DC-DC converter to cause current re-circulation between the first DC-DC converter and the second DC-DC converter.

    Electrical system for a vehicle with start/stop

    公开(公告)号:US10036360B2

    公开(公告)日:2018-07-31

    申请号:US15636851

    申请日:2017-06-29

    Abstract: An electrical system for a vehicle having an internal combustion engine with start/stop capability includes a primary battery connectible to an engine starter motor; a secondary battery, an alternator, and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery by a charge switch; in parallel with the secondary battery, a DC/DC converter in series with a third electrical energy source; and a bypass switch operable to selectively bypass the DC/DC converter. The bypass switch allows for selective bypassing the DC/DC converter and charging/discharging of the third electrical energy source during start/stop operation, to ensure a sufficient voltage level over the additional vehicle electrical loads when the internal combustion engine and consequently the alternator are not running.

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