Control unit for operating a safety system for a vehicle and method for operating such a safety system for a vehicle

摘要

In a control device and a method for operating a safety system for a vehicle, a step-up converter is fashioned as a switching converter which converts an input voltage derived from a vehicle battery voltage into a higher charge voltage at its output. In addition, at least one energy reserve storage device is provided that is charged by the charge voltage for the operation of the safety system in an autarkic mode. Between the step-up converter and the at least one energy reserve storage device there is connected a charge current source that is programmable during operation and that defines a charge current for the at least one energy reserve storage device as a function of its programming.

主权项

1. A control device for operating a safety system for a vehicle, comprising:
a step-up converter which is configured as a switching converter and converts an input voltage derived from a vehicle battery voltage into a higher charge voltage as an output; at least one energy reserve storage device which is charged by the charge voltage output by the converter for the operation of the safety system in an autarkic mode; a charge current source connected between the step-up converter and the at least one energy reserve storage device, wherein the charge current source is programmable during operation and defines a charge current for the at least one energy reserve storage device as a function of the programming; and a logic unit which performs, as a function of at least one electrical parameter at the energy reserve storage device, during the charging of the energy reserve storage device, an initial measurement of a capacitance of the energy reserve storage device, and subsequently performs a measurement of an equivalent internal resistance of the energy reserve storage device.