A low-voltage power-off method for a hydrogen energy vehicle

Abstract

The present invention discloses a low-voltage power-off method for a hydrogen energy vehicle, which includes: a passive entry passive start (PEPS) system, an electronic steering column lock (ESCL), a start-stop button (SSB), an accessory (ACC) gear relay, a vehicle speed detection component, a brake pedal component, and an ignition (IGN) gear relay. The ESCL, SSB, ACC gear relay, vehicle speed detection component, brake pedal component, and IGN gear relay are all communicatively connected to the PEPS system. The low-voltage power-off method includes a normal power-off control step in the ON gear and an emergency power-off control step in the ON gear. The low-voltage power-off method for the hydrogen energy vehicle of the present invention has the advantages of safety and reliability.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen fuel cells, and more specifically, to a low-voltage power-off method for a hydrogen energy vehicle. Background Art

[0002] As the name implies, a hydrogen energy vehicle is a vehicle that uses hydrogen as its energy source, converting the chemical energy generated by the reaction of hydrogen into mechanical energy to drive the vehicle. With the popularization and promotion of hydrogen energy vehicles, there is an urgent need for low-voltage power-on and power-off control strategies and logics during the development of hydrogen energy vehicles. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a low-voltage power-off method for a hydrogen energy vehicle in view of the technical problem that there is an urgent need for low-voltage power-on and power-off control strategies and logics during the development of hydrogen energy vehicles in the prior art.

[0004] In a low-voltage power-off method for a hydrogen energy vehicle provided by the present invention to solve its technical problems, the hydrogen energy vehicle includes: a passive entry passive start system (PEPS), an electronic steering column lock (ESCL), a start-stop button (SSB), an accessory relay, a vehicle speed detection component, a brake pedal component, and an ignition relay. The electronic steering column lock (ESCL), the start-stop button (SSB), the accessory relay, the vehicle speed detection component, the brake pedal component, and the ignition relay are all communicatively connected to the passive entry passive start system (PEPS). The low-voltage power-off method includes an ON gear normal power-off control step and an ON gear emergency power-off control step; wherein, the ON gear normal power-off control step specifically includes the following steps:

[0005] S11. The passive entry passive start system (PEPS) determines whether the power mode of the hydrogen energy vehicle is in the ON gear. If so, it proceeds to step S12; otherwise, it proceeds to step S14.

[0006] S12. Whether the passive entry passive start system (PEPS) receives a button trigger signal for starting the start-stop button (SSB). If so, it proceeds to step S13; otherwise, it does not respond, and the power mode of the hydrogen energy vehicle continues to remain in the ON gear.

[0007] S13. The passive entry passive start system (PEPS) determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to a preset speed threshold. If so, it controls the ignition relay and the accessory relay to disconnect; otherwise, it does not respond, and the power mode of the hydrogen energy vehicle continues to remain in the ON gear. After the ignition relay and the accessory relay are disconnected, the ignition relay and the accessory relay output a low-level valid signal to control the power mode to exit to the OFF gear, and at the same time, send a power status signal to the passive entry passive start system (PEPS) through the CAN bus to inform that the power mode has exited to the OFF gear.

[0008] S14. The keyless system PEPS determines whether the power mode of the hydrogen energy vehicle is in the ACC gear. If so, it proceeds to step S15; otherwise, it does not respond.

[0009] S15. Whether the keyless system PEPS receives a button trigger signal for starting the one - key start switch SSB. If not, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the ACC gear. If so, it further determines whether the time for the hydrogen energy vehicle's power mode to be in the ACC gear exceeds a preset duration. If it does not exceed the preset duration, it proceeds to step S16; if it exceeds the preset duration, the ACC gear relay is disconnected.

[0010] S16. Whether the keyless system PEPS receives a signal that the brake pedal has been depressed from the brake pedal assembly. If so, it proceeds to step S17; if not, it proceeds to step S18.

[0011] S17. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to the speed threshold. If so, the ACC gear relay is disconnected; otherwise, it does not respond.

[0012] S18. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to the speed threshold. If so, the IGN gear relay is closed.

[0013] The ON - gear emergency power - off control steps specifically include the following steps:

[0014] S21. The keyless system PEPS determines whether the power mode of the hydrogen energy vehicle is in the ON gear. If so, it proceeds to step S22; otherwise, it does not respond.

[0015] S22. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is invalid or the vehicle speed is greater than the speed threshold. If so, it proceeds to step S23; otherwise, it proceeds to step S24.

[0016] S23. The keyless system PEPS determines that within a certain time, the number of times the keyless system PEPS receives a button trigger signal for starting the one - key start switch SSB reaches a preset number, and the preset number is greater than 1 time. If so, the ACC gear relay is disconnected, and a power status signal is sent to the keyless system PEPS via the CAN bus to inform that the power mode has exited to the ACC gear; otherwise, it does not respond.

[0017] S24. Whether the keyless system PEPS receives the button trigger signal for starting the one - key start switch SSB. If not, it does not respond. If so, it controls the IGN relay and the ACC - gear relay to disconnect. After the IGN relay and the ACC - gear relay are disconnected, the IGN relay and the ACC - gear relay output a low - level effective signal to control the power mode to exit to the OFF gear. At the same time, it sends a power - status signal to the keyless system PEPS via the CAN bus to inform that the power mode has exited to the OFF gear.

[0018] Further, in the low - voltage power - off method of the hydrogen - energy vehicle of the present invention, the speed threshold = 5 km / h.

[0019] Further, in the low - voltage power - off method of the hydrogen - energy vehicle of the present invention, the "certain time" refers to within 3 seconds, and the "preset number of times" refers to 3 times.

[0020] Further, in the low - voltage power - off method of the hydrogen - energy vehicle of the present invention, the preset duration = 0.5 hour.

[0021] Further, in the low - voltage power - off method of the hydrogen - energy vehicle of the present invention, the hydrogen - energy vehicle also has an instrument IC for sending the alarm signal generated by the keyless system PEPS to the dashboard for display.

[0022] Implementing the low - voltage power - off method of the hydrogen - energy vehicle of the present invention has the following technical effects: The present invention provides a low - voltage power - off method for a hydrogen - energy vehicle, which has the advantages of safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following will further illustrate the present invention in conjunction with the drawings. In the drawings:

[0024] Figure 1 is the flowchart of the normal power - off control steps in the ON gear of the present invention;

[0025] Figure 2 is the flowchart of the emergency power - off control steps in the ON gear of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the drawings.

[0027] In the low-voltage power-off method of the hydrogen energy vehicle in this embodiment, the hydrogen energy vehicle includes: a passive entry passive start system (PEPS), an electronic steering column lock (ESCL), a start-stop button (SSB), an accessory relay, a vehicle speed detection component, a brake pedal component, and an ignition relay. The electronic steering column lock (ESCL), the start-stop button (SSB), the accessory relay, the vehicle speed detection component, the brake pedal component, and the ignition relay are all communicatively connected to the passive entry passive start system (PEPS). The low-voltage power-off method includes an ON-gear normal power-off control step and an ON-gear emergency power-off control step.

[0028] Reference Figure 1 , the ON-gear normal power-off control step specifically includes the following steps:

[0029] S11. The passive entry passive start system (PEPS) determines whether the power mode of the hydrogen energy vehicle is in the ON gear. If so, it proceeds to step S12; otherwise, it proceeds to step S14.

[0030] S12. Whether the passive entry passive start system (PEPS) receives a button trigger signal for starting the start-stop button (SSB). If so, it proceeds to step S13; otherwise, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the ON gear.

[0031] S13. The passive entry passive start system (PEPS) determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to the preset 5 km / h. If so, it controls the ignition relay and the accessory relay to disconnect; otherwise, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the ON gear. After the ignition relay and the accessory relay are disconnected, the ignition relay and the accessory relay output a low-level valid signal to control the power mode to exit to the OFF gear, and at the same time, send a power status signal to the passive entry passive start system (PEPS) through the CAN bus to inform that the power mode has exited to the OFF gear.

[0032] S14. The passive entry passive start system (PEPS) determines whether the power mode of the hydrogen energy vehicle is in the accessory (ACC) gear. If so, it proceeds to step S15; otherwise, it does not respond.

[0033] S15. Whether the passive entry passive start system (PEPS) receives a button trigger signal for starting the start-stop button (SSB). If not, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the accessory (ACC) gear. If so, it further determines whether the time for the power mode of the hydrogen energy vehicle to be in the accessory (ACC) gear exceeds 0.5 hours. If it does not exceed the preset duration, it proceeds to step S16; if it exceeds the preset duration, it disconnects the accessory relay.

[0034] S16. Whether the passive entry passive start system (PEPS) receives a signal that the brake pedal is depressed generated by the brake pedal component. If so, it proceeds to step S17; if not, it proceeds to step S18.

[0035] S17. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to 5 km / h. If so, it disconnects the ACC gear relay; otherwise, it does not respond.

[0036] S18. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to 5 km / h. If so, it closes the IGN gear relay.

[0037] Reference Figure 2 , the ON gear emergency power-off control steps specifically include the following steps:

[0038] S21. The keyless system PEPS determines whether the power mode of the hydrogen energy vehicle is in the ON gear. If so, it proceeds to step S22; otherwise, it does not respond.

[0039] S22. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is invalid or the vehicle speed is greater than 5 km / h. If so, it proceeds to step S23; otherwise, it proceeds to step S24.

[0040] S23. The keyless system PEPS determines that within 3 s, the keyless system PEPS receives the button trigger signal for starting the one-key start switch SSB up to 3 times. If so, it disconnects the ACC gear relay and sends a power status signal to the keyless system PEPS via the CAN bus to inform that the power mode has exited to the ACC gear; if not, it does not respond.

[0041] S24. Whether the keyless system PEPS receives the button trigger signal for starting the one-key start switch SSB. If not, it does not respond; if so, it controls the IGN relay and the ACC gear relay to disconnect. After the IGN relay and the ACC gear relay disconnect, the IGN relay and the ACC gear relay output a low-level valid signal to control the power mode to exit to the OFF gear, and at the same time send a power status signal to the keyless system PEPS via the CAN bus to inform that the power mode has exited to the OFF gear.

[0042] Furthermore, in the low-voltage power-off method of the hydrogen energy vehicle of the present invention, the hydrogen energy vehicle also has an instrument IC for sending the alarm signal generated by the keyless system PEPS to the instrument panel for display.

[0043] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. These all fall within the protection scope of the present invention.

Claims

1. A low-voltage power-off method for a hydrogen energy vehicle, the hydrogen energy vehicle comprising: a passive entry passive start (PEPS) system, an electronic steering column lock (ESCL), a start-stop button (SSB), an accessory (ACC) gear relay, a vehicle speed detection component, a brake pedal component, and an ignition (IGN) gear relay, wherein the electronic steering column lock (ESCL), the start-stop button (SSB), the accessory (ACC) gear relay, the vehicle speed detection component, the brake pedal component, and the ignition (IGN) gear relay are all communicatively connected to the passive entry passive start (PEPS) system, characterized in that, The low-voltage power-off method includes a normal power-off control step and an emergency power-off control step in the ON gear; among them, The normal power-off control step in the ON gear specifically includes the following steps: S11. The keyless system PEPS determines whether the power mode of the hydrogen energy vehicle is in the ON gear. If so, it enters step S12; otherwise, it enters step S14. S12. Whether the keyless system PEPS receives a button trigger signal for starting the one-key start switch SSB. If so, it enters step S13; otherwise, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the ON gear. S13. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to the preset speed threshold. If so, it controls the IGN relay and the ACC gear relay to disconnect; otherwise, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the ON gear. After the IGN relay and the ACC gear relay are disconnected, the IGN relay and the ACC gear relay output a low-level valid signal to control the power mode to exit to the OFF gear, and at the same time send a power status signal to the keyless system PEPS through the CAN bus to inform that the power mode has exited to the OFF gear. S14. The keyless system PEPS determines whether the power mode of the hydrogen energy vehicle is in the ACC gear. If so, it enters step S15; otherwise, it does not respond. S15. Whether the keyless system PEPS receives a button trigger signal for starting the one-key start switch SSB. If not, it does not respond, and the power mode of the hydrogen energy vehicle continues to be in the ACC gear. If so, it further determines whether the time for the power mode of the hydrogen energy vehicle to be in the ACC gear exceeds the preset duration. If it does not exceed the preset duration, it enters step S16; if it exceeds the preset duration, it disconnects the ACC gear relay. S16. Whether the keyless system PEPS receives a signal that the brake pedal is depressed generated by the brake pedal component. If so, it enters step S17; if not, it enters step S18. S17. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to the speed threshold. If so, it disconnects the ACC gear relay; otherwise, it does not respond. S18. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is valid and the vehicle speed is less than or equal to the speed threshold. If so, it closes the IGN gear relay. The emergency power-off control step in the ON gear specifically includes the following steps: S21. The keyless system PEPS determines whether the power mode of the hydrogen energy vehicle is in the ON gear. If so, it enters step S22; otherwise, it does not respond. S22. The keyless system PEPS determines that the vehicle speed detected by the vehicle speed detection component is invalid or the vehicle speed is greater than the speed threshold. If so, it enters step S23; otherwise, it enters step S24. S23. The keyless system PEPS determines that within a certain period of time, the keyless system PEPS receives button trigger signals for starting the start-stop button SSB reaching a preset number of times, and the preset number of times is greater than 1. If so, disconnect the ACC relay, and send a power status signal through the CAN bus to the keyless system PEPS to inform that the power mode has exited to the ACC gear. If not, do not respond. S24. Whether the keyless system PEPS receives button trigger signals for starting the start-stop button SSB. If not, do not respond. If so, control the IGN relay and the ACC relay to disconnect. After the IGN relay and the ACC relay are disconnected, the IGN relay and the ACC relay output low-level valid signals to control the power mode to exit to the OFF gear, and at the same time send a power status signal through the CAN bus to the keyless system PEPS to inform that the power mode has exited to the OFF gear.

2. The low-voltage power-off method of the hydrogen energy vehicle according to claim 1, characterized in that, The speed threshold = 5 km / h.

3. The low-voltage power-off method of the hydrogen energy vehicle according to claim 1, wherein, The "within a certain period of time" refers to within 3 seconds, and the "preset number of times" refers to 3 times.

4. The low-voltage power-off method for a hydrogen energy vehicle according to claim 1, characterized in that The preset duration = 0.5 hours.

5. The low-voltage power-off method of the hydrogen energy vehicle according to claim 1, characterized in that The hydrogen energy vehicle also has an instrument IC for sending the alarm signal generated by the keyless system PEPS to the instrument panel for display.

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