Power supply device and in-vehicle power supply system

Abstract

This technology provides a way for the power supply device to perform processing corresponding to the maximum power consumption of the power receiving device, even if the maximum power consumption of the power receiving device is changed. [Solution] The power supply device 10 is an in-vehicle power supply device that transmits data signals and power superimposed via cable 80 to the power receiving device 50. The power receiving device 50 stores corresponding information indicating the maximum power consumption. The power supply device 10 receives the corresponding information from the power receiving device 50 via cable 80 and performs corresponding processing corresponding to the corresponding information.

Claims

1. An in-vehicle power supply device that transmits data signals and power superimposed on each other to a power receiving device via a cable, The device receives corresponding information indicating the maximum power consumption stored in the power receiving device via the cable, and performs corresponding processing corresponding to the corresponding information. Power supply device.

2. Power is supplied from the power supply device to the power receiving device using either PoDL (Power over Data Line) or PoE (Power over Ethernet). The aforementioned correspondence information is class information indicating the power class of the power receiving device, As part of the aforementioned process, the power class is updated based on the class information received from the power receiving device. The power supply device according to claim 1.

3. It comprises a power input unit into which power is input from an external source, a power path provided between the power input unit and the cable, a switch unit provided in the power path, a parallel power path provided in parallel with the power path between the power input unit and the cable, a parallel switch unit provided in the parallel power path, and a control unit that controls the switch unit and the parallel switch unit. The control unit performs, as the corresponding process, a first control that controls only one of the switch unit and the parallel switch unit to the ON state based on the corresponding information, and a second control that controls both the switch unit and the parallel switch unit to the ON state. The power supply device according to claim 2.

4. It has a first power input section that receives power from an external source, and a second power input section that is separate from the first power input section. The power supply device according to claim 2.

5. The system determines that an abnormality exists if the current consumption or power consumption of the power receiving device exceeds a threshold, and the corresponding process involves setting the threshold based on the corresponding information. A power supply device according to any one of claims 1 to 4.

6. The power supply device according to claim 1, Multiple of the aforementioned cables, A direct power receiving device, which is connected to the power supply device via the cable, An in-vehicle power supply system comprising: an indirect power receiving device as the power receiving device, which is connected to the direct power receiving device via another cable; The direct power receiving device has in advance stored a table that associates multiple maximum power consumptions with corresponding information indicating each maximum power consumption, and when the indirect power receiving device is connected to it, it acquires the corresponding information stored by the indirect power receiving device and updates the corresponding information stored by itself based on the acquired corresponding information and the table. The power supply device performs the corresponding processing corresponding to the corresponding information obtained from the direct power receiving device connected to it. In-vehicle power supply system.

7. The power supply device requests the corresponding information from the direct power receiving device. When the indirect power receiving device is not connected and the corresponding information is requested, the direct power receiving device sends a signal to the power supply device indicating the corresponding information it stores. When the indirect power receiving device is connected and the corresponding information is requested, the direct power receiving device retrieves the corresponding information stored by the indirect power receiving device, updates the corresponding information it stores, and sends a signal to the power supply device indicating the updated corresponding information. The in-vehicle power supply system according to claim 6.

8. The power supply device according to claim 2, The aforementioned cable, An in-vehicle power supply system comprising the aforementioned power receiving device, The power receiving device has a power receiving side input section. In-vehicle power supply system.

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