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CN-122026365-A - Power supply method and device

CN122026365ACN 122026365 ACN122026365 ACN 122026365ACN-122026365-A

Abstract

The application provides a power supply method and device, and relates to the technical field of power supplies. In this method, in the case where the battery of the vehicle supplies power to the first load through the ac power supply circuit, the control device in the vehicle may sample the current signal of the ac output circuit in the ac power supply circuit through the current sampling device. The ac output circuit is part of a power supply circuit, and the current (power) output by the output circuit can be input into a first load to supply power to the first load. The control means may determine whether the ac output circuit has an arc based on the current signal, disconnect the ac power supply circuit in the event that the ac output circuit has an arc, and/or control another ac power supply circuit to supply power to the first load. Therefore, the hidden fire trouble caused by arc generation in the vehicle due to the fault of the alternating current power supply circuit can be reduced, and the safety of the alternating current power supply circuit in the vehicle is improved.

Inventors

  • KONG LINGHAO

Assignees

  • 引望智能技术有限公司

Dates

Publication Date
20260512
Application Date
20251231

Claims (20)

  1. 1. A method of supplying power to a vehicle, the method comprising: determining that an alternating current output circuit in a first alternating current power supply circuit generates an arc under the condition that the first alternating current power supply circuit supplies power for a first load; and disconnecting the first alternating current power supply circuit and/or controlling a second alternating current power supply circuit to supply power to the first load.
  2. 2. The method of claim 1, further comprising obtaining a current signal of an AC output circuit in the first AC power circuit; The determining that an ac output circuit in the first ac power supply circuit generates an arc includes: Based on the current signal, it is determined that the ac output circuit is arcing.
  3. 3. The method of claim 2, wherein determining that the ac output circuit is arcing comprises: And determining that the characteristic frequency of the current signal is matched with a reference characteristic frequency, wherein the reference characteristic frequency is related to a power supply scene.
  4. 4. A method according to claim 3, characterized in that the supply scenario is related to the signal characteristics of the current signal and/or the type of the first load.
  5. 5. The method of any of claims 2-4, wherein the AC output circuit generates an arc comprising a number of characteristic frequencies greater than a first number in a first frequency range in the spectral information of the current signal.
  6. 6. The method of claim 5, wherein the AC output circuit generates an arc comprising a weighted sum of magnitudes of the characteristic frequencies in a first frequency range greater than a first threshold, wherein the magnitudes of the characteristic frequencies are greater than a second threshold.
  7. 7. The method of any of claims 2-6, wherein the arc generated by the ac output circuit is determined based on a first model; The input information of the first model comprises frequency spectrum information of the current signal and frequency spectrum information of a current signal under a non-arc working condition, wherein the frequency spectrum information of the current signal under the non-arc working condition comprises switching frequency information; The output information of the first model includes that the alternating current output circuit generates an arc or that the alternating current output circuit does not generate an arc.
  8. 8. The method of any of claims 1-7, wherein after the disconnecting the first ac power circuit, the method further comprises outputting a first prompt prompting a user that the first ac power circuit is powered down.
  9. 9. The method of any of claims 1-8, wherein after the controlling the second ac power circuit to power the first load, the method further comprises outputting a second prompt prompting a user that the first ac power circuit is powered down, the second ac power circuit powering the first load.
  10. 10. The method according to any one of claims 1-9, wherein the method further comprises: under the condition that a first direct current power supply circuit supplies power for a second load, determining that a direct current output circuit in the first direct current power supply circuit generates an arc; and disconnecting the first direct current power supply circuit and/or controlling a second direct current power supply circuit to supply power to the second load.
  11. 11. The method according to any one of claims 1-10, wherein the current signal of the ac output circuit in the first ac supply circuit is obtained by means of a current sampling device.
  12. 12. The method of any one of claims 1-11, wherein the first load comprises one or more of an electric rice cooker, a refrigerator, or a hot water kettle.
  13. 13. A method of supplying power to a charging pile, the method comprising: determining that an alternating current output circuit in a first alternating current power supply circuit generates an arc under the condition that the first alternating current power supply circuit supplies power for a first load; And based on the alternating current output circuit, generating an arc, disconnecting the first alternating current power supply circuit and/or controlling a second alternating current power supply circuit to supply power to the first load.
  14. 14. A method of supplying power to a photovoltaic charging panel apparatus, the method comprising: under the condition that a first direct current power supply circuit supplies power for a second load, determining that a direct current output circuit in the first direct current power supply circuit generates an arc; and based on the direct current output circuit, generating an arc, disconnecting the first direct current power supply circuit and/or controlling a second direct current power supply circuit to supply power to the second load.
  15. 15. The method of claim 14, wherein the method further comprises: Determining that a maximum power point tracking circuit between the photovoltaic charging panel device and a vehicle generates an arc; the maximum power point tracking circuit is turned off based on the maximum power point tracking circuit generating an arc.
  16. 16. The power supply device is characterized by comprising a current sampling device, a first alternating current power supply circuit, a second alternating current power supply circuit, a processing module and a control module, wherein the current sampling device is connected with an alternating current output circuit in the first alternating current power supply circuit; the current sampling device is used for collecting current signals of the alternating current output circuit; The processing module is used for acquiring a current signal of the alternating current output circuit and determining that an alternating current output circuit in the first alternating current power supply circuit generates an arc based on the current signal of the alternating current output circuit; the control module is used for generating an arc based on the alternating current output circuit, disconnecting the first alternating current power supply circuit and/or controlling a second alternating current power supply circuit to supply power for the first load.
  17. 17. A power supply device comprising at least one processor and a memory for storing computer readable instructions which, when read from the memory by the at least one processor, cause the device to perform the method of any one of claims 1 to 12, or to perform the method of claim 13, or to perform the method of claim 14 and/or 15.
  18. 18. An intelligent driving apparatus comprising the device of claim 16 or 17.
  19. 19. A computer readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the method of any one of claims 1 to 12, or to perform the method of claim 13, or to perform the method of claim 14 and/or 15.
  20. 20. A computer program product comprising computer programs or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 11 to 12, or to perform the method of claim 13, or to perform the method of claim 14 and/or 15.

Description

Power supply method and device Technical Field The embodiment of the application relates to the technical field of power supplies, in particular to a power supply method and device. Background As vehicle electrification progresses, the load in the vehicle increases. In some scenarios, 220V ac power is also provided in the vehicle to power the devices in the vehicle. For example, the vehicle may power a hot water kettle in the vehicle by 220V ac voltage. However, the circuit for supplying power to the thermos in the vehicle may generate problems of broken wire harness, unstable connection and the like, and potential safety hazards are caused by arc, such as local overheating, electrical fire and the like, which may cause the influence on the safety and reliability of the vehicle. Disclosure of Invention The application provides a power supply method and a power supply device, which can reduce the risk of fire hazards caused by arc generation due to the failure of an alternating current power supply circuit in a vehicle and improve the safety of the power supply circuit in the vehicle. In a first aspect, the application provides a power supply method applied to a vehicle, and the method comprises the steps of determining that an alternating current output circuit in a first alternating current power supply circuit generates an arc under the condition that the first alternating current power supply circuit supplies power to a first load, disconnecting the first alternating current power supply circuit, and/or controlling a second alternating current power supply circuit to supply power to the first load. The alternating current output circuit is a part of the first power supply circuit, and the current (power) output by the alternating current output circuit can be input into the first load to supply power to the first load. The control device in the vehicle may determine whether an arc is generated in an ac output circuit in the first ac power supply circuit, and in the case where the arc is generated in the ac output circuit, open the first ac power supply circuit, Therefore, the risk of fire hazards caused by arc generation due to the fault of the alternating current power supply circuit in the vehicle can be reduced, and the safety of the power supply circuit in the vehicle is improved. In one possible implementation, the method further includes obtaining a current signal of an ac output circuit in the first ac power supply circuit, and determining that the ac output circuit in the first ac power supply circuit is arcing includes determining that the ac output circuit is arcing based on the current signal. Therefore, whether the arc characteristics exist or not can be rapidly and accurately identified from the current signal, whether the arc is generated by the alternating current output circuit or not is determined, and the arc detection efficiency is high. In one possible implementation, determining that the AC output circuit is arcing includes determining that a characteristic frequency of the current signal matches a reference characteristic frequency, the reference characteristic frequency being associated with a power supply scenario. In this way, it is determined that the AC output circuit is arcing when the characteristic frequency of the current signal matches the reference characteristic frequency, and it is determined that the AC output circuit is not arcing when the characteristic frequency of the current signal matches the reference characteristic frequency. The method does not need to calculate the characteristic frequency of the current signal, and the efficiency of arc judgment is obtained. In one possible implementation, the power supply scenario is related to the signal characteristics of the current signal and/or the type of the first load. Alternatively, the signal characteristics of the current signal may include the magnitude of the current amplitude and the ac-dc type of the current. The type of the first load may include a kind of the first load, for example, the type of the first load may be an electric rice cooker, a refrigerator, a hot water kettle, or the like. The control device in the vehicle can determine the power supply scene based on the signal characteristics of the current signals and/or the type of the first load, so that the corresponding reference characteristic frequency is determined, whether the alternating current output circuit generates an arc is judged based on whether the reference characteristic frequency is matched with the characteristic frequency of the acquired current signals, the calculated amount is small, and the arc judgment efficiency is improved. In one possible implementation, the ac output circuit generates an arc including a number of characteristic frequencies greater than a first number in a first frequency range in the spectral information of the current signal. That is, in the case where the number of characteristic frequencies is large, it