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US 10,855,105 B2Granted
Autonomous vehicle critical load backup
AssigneeFord Global Technologies, LLC
InventorMathew A. Boesch
Life of this patent
Estimating the term…
Abstract
A vehicle power management system includes a backup battery and an isolation circuit. The isolation circuit has a switch in parallel with a diode. The isolation circuit is electrically connected to the backup battery. The isolation circuit electrically isolates the backup battery from a non-critical load when the switch is open.
Claims15
A vehicle power management system comprising:
- a first backup battery;
- a first isolation circuit having a first switch in parallel with a first diode, wherein the first isolation circuit is electrically connected to the first backup battery to electrically isolate the first backup battery from a first non-critical load when the first switch is open;
- a second backup battery;
- a second isolation circuit having a second switch in parallel with a second diode to electrically isolate the second backup battery from a second non-critical load, wherein the second isolation circuit is electrically connected to the second backup battery to electrically isolate the second backup battery from the second non-critical load when the second switch is open;
- a first voltage converter electrically connected to the first non-critical load, the first isolation circuit, and the first backup battery;
- and
- a second voltage converter electrically connected to the second non-critical load, the second isolation circuit, and the second backup battery,
- wherein a high output voltage of the first voltage converter to the first isolation circuit causes the first switch of the first isolation circuit to close,
- wherein an anode of the first diode is electrically connected to the first non-critical load and a cathode of the first diode is electrically connected to the first backup battery,
- wherein a high output voltage of the second voltage converter to the second isolation circuit causes the second switch of the second isolation circuit to close.
7 more elements
A vehicle power management system comprising:
- a first backup battery;
- a first isolation circuit having a first switch in parallel with a first diode, wherein the first isolation circuit is electrically connected to the first backup battery to electrically isolate the first backup battery from a first non-critical load when the first switch is open;
- a second backup battery;
- a second isolation circuit having a second switch in parallel with a second diode to electrically isolate the second backup battery from a second non-critical load, wherein the second isolation circuit is electrically connected to the second backup battery to electrically isolate the second backup battery from a second non-critical load when the second switch is open;
- a first voltage converter electrically connected to the first non-critical load, the first isolation circuit, the first backup battery, the second non-critical load, the second isolation circuit, and the second backup battery;
- a second voltage converter electrically connected to the first non-critical load, the first isolation circuit, the first backup battery, the second non-critical load, the second isolation circuit, and the second backup battery;
- a memory;
- and
- a processor programmed to execute instructions stored in the memory, wherein the instructions include detecting a short-circuit and outputting a control signal to open at least one of the first switch and the second switch as a result of detecting the short-circuit,
- wherein a reduction of voltage at a circuit junction between the first voltage converter and the first isolation circuit opens the first switch of the first isolation circuit and wherein a reduction of voltage at a circuit junction between the second voltage converter and the second isolation circuit opens the second switch of the second isolation circuit.
7 more elements
A vehicle power management system comprising:
- a first backup battery;
- a first isolation circuit having a first switch in parallel with a first diode, wherein the first isolation circuit is electrically connected to the first backup battery to electrically isolate the first backup battery from a first non-critical load when the first switch is open;
- a second backup battery;
- a second isolation circuit having a second switch in parallel with a second diode to electrically isolate the second backup battery from a second non-critical load, wherein the second isolation circuit is electrically connected to the second backup battery to electrically isolate the second backup battery from a second non-critical load when the second switch is open;
- a first voltage converter electrically connected to the first non-critical load, the first isolation circuit, the first backup battery, the second non-critical load, the second isolation circuit, and the second backup battery;
- a second voltage converter electrically connected to the first non-critical load, the first isolation circuit, the first backup battery, the second non-critical load, the second isolation circuit, and the second backup battery;
- a memory;
- and
- a processor programmed to execute instructions stored in the memory, wherein the instructions include detecting a short-circuit and outputting a control signal to open at least one of the first switch and the second switch as a result of detecting the short-circuit,
- wherein a reduction of voltage at a circuit junction between the second voltage converter and the first isolation circuit opens the first switch of the first isolation circuit and wherein a reduction of voltage at a circuit junction between the first voltage converter and the second isolation circuit opens the second switch of the second isolation circuit.
7 more elements
Dependencies are inferred from the claim text.