Parking brake release circuit, vehicle and rail vehicle

Abstract

The present disclosure relates to the technical field of vehicle brake control, and provides a parking brake release circuit, a vehicle and a railway vehicle. The parking brake release circuit comprises: at least one motor interface, a first end of the at least one motor interface being used for connecting at least one parking brake motor, the motor interface and the parking brake motor corresponding to each other; a power supply interface, a first end of the power supply interface being used for connecting a vehicle-mounted power supply; a switch, a first end of the switch being connected to a second end of the at least one motor interface, and a second end of the switch being connected to a second end of the power supply interface; the switch being used for turning on or turning off a power supply circuit of the vehicle-mounted power supply to the at least one parking brake motor, wherein the power supply circuit is used for driving the parking brake motor to perform brake release, and turning on or turning off of the switch is controlled by any controller in the vehicle except an electronic parking controller or is manually controlled. In the case of failure of the electronic parking controller, the parking brake is quickly released, and the brake release is quickly performed.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle braking control technology, specifically to a parking brake release circuit, a vehicle, and a rail vehicle. Background Technology

[0002] The Electronic Parking Brake (EPB) system uses electrical signals to control the brakes to achieve parking, replacing the traditional mechanical handbrake. It can automatically brake / release the brakes and supports functions such as hill start assist and automatic parking.

[0003] In existing technology, a DC power supply provides positive and negative voltages to the parking brake motor via an electronic parking controller, causing the parking brake motor to rotate forward or reverse to perform corresponding parking braking and brake release. If the electronic parking controller malfunctions while the parking brake is engaged, the DC power supply cannot be provided to the parking brake motor via the electronic parking controller to release the brake. Utility Model Content

[0004] The purpose of this disclosure is to provide a parking brake release circuit and a vehicle to solve problems in the related art.

[0005] To achieve the above objectives, this disclosure provides a parking brake release circuit, comprising:

[0006] At least one motor interface, the first end of which is used to connect at least one parking brake motor, and the motor interface and the parking brake motor correspond one-to-one;

[0007] A power interface, the first end of which is used to connect to the vehicle power supply.

[0008] A switch, wherein a first end of the switch is connected to a second end of the at least one motor interface, and a second end of the switch is connected to a second end of the power interface;

[0009] The switch is used to turn on or off the power supply circuit of the vehicle power supply to the at least one parking brake motor, wherein the power supply circuit is used to drive the parking brake motor to perform braking relief. The turning on or off of the switch is controlled by any controller in the vehicle other than the electronic parking controller, or by manual control.

[0010] Optionally, the parking brake release circuit further includes: a brake release controller;

[0011] The brake release controller is connected to the switch and is used to control the closing or opening of the switch to connect or disconnect the power supply circuit of the vehicle power supply to the at least one parking brake motor.

[0012] Optionally, the brake release controller is the vehicle's overall controller.

[0013] Optionally, the closing or opening of the switch is controlled by touch operation on the vehicle's display.

[0014] Optionally, the switch is a manual switch.

[0015] Optionally, the switch is a remote control switch.

[0016] This disclosure also provides a vehicle, including:

[0017] At least one parking brake motor;

[0018] Vehicle power supply;

[0019] An electronic parking controller, wherein the electronic parking controller is connected to the at least one parking control motor;

[0020] The aforementioned parking brake release circuit.

[0021] Optionally, the parking brake release circuit further includes a brake release controller;

[0022] The brake release controller is connected to the electronic parking brake controller. The brake release controller is used to detect the working status of the electronic parking brake controller and control the vehicle's display to show the working status of the electronic parking brake controller.

[0023] Optionally, the vehicle power source is a vehicle battery.

[0024] Optionally, the parking brake motor is a brushed clamp motor.

[0025] This disclosure also provides a rail vehicle, including:

[0026] At least one parking brake motor;

[0027] Vehicle power supply;

[0028] An electronic parking controller, wherein the electronic parking controller is connected to the at least one parking control motor;

[0029] The aforementioned parking brake release circuit.

[0030] Optionally, the rail vehicle further includes multiple carriages, and there are multiple parking brake release circuits, with each carriage and parking brake release circuit corresponding to the other.

[0031] Through the above technical solution, at least one motor interface is connected to at least one parking brake motor at its first end, and at least one motor interface is connected to the first end of a switch, so that the switch and the parking brake motor are connected through the motor interface. The first end of the power interface is connected to the vehicle power supply, and the second end of the power interface is connected to the second end of the switch, so that the switch and the vehicle power supply are connected through the power interface. The vehicle power supply is connected to at least one parking brake motor through the switch. The switch can conduct or disconnect the power supply circuit of the vehicle power supply to at least one parking brake motor. The vehicle power supply can provide an inverse voltage to at least one parking brake motor through the switch, so that at least one parking brake motor automatically reverses to achieve brake release. Thus, in the event of a failure of the electronic parking controller, the parking brake can be quickly released and the brake can be quickly relieved.

[0032] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of a parking brake release circuit according to an exemplary embodiment.

[0035] Figure 2 This is a schematic diagram illustrating another parking brake release circuit according to an exemplary embodiment.

[0036] Figure 3 This is a schematic diagram of the control logic for releasing parking brake according to an exemplary embodiment.

[0037] Explanation of reference numerals in the attached figures

[0038] 10-Motor interface, 20-Power interface, 30-Switch, 40-Brake release controller, 11-Parking brake motor, 21-On-board power supply, 41-Vehicle controller, 51-Vehicle display, 61-Electronic parking controller. Detailed Implementation

[0039] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0040] In the following description, the words "first" and "second" are used only to distinguish the purpose of the description and should not be interpreted as indicating or implying relative importance or order.

[0041] The electronic parking brake system uses electrical signals to control the brakes to achieve parking, replacing the traditional mechanical handbrake. It can automatically brake / release the brakes and supports functions such as hill start assist and automatic parking.

[0042] In existing technology, a DC power supply provides positive and negative voltages to the parking brake motor via an electronic parking controller, causing the parking brake motor to rotate forward or reverse to perform corresponding parking braking and brake release. If the electronic parking controller malfunctions while the parking brake is engaged, the DC power supply cannot be provided to the parking brake motor via the electronic parking controller to release the brake.

[0043] In rail vehicle applications, prolonged stops on the line can disrupt the normal operation of the entire line, consequently affecting the normal operation of other rail vehicles and requiring a considerable amount of time to restore normal operation.

[0044] Chinese patent application CN113859191A, entitled "A Control Method and Device for Parking Brake," relates to the field of railway vehicles. The disclosed control method for parking brake includes: firstly, detecting whether a parking brake operation command has been received; if so, determining whether the freight train is in motion; if the freight train is not in motion, sending a parking brake application command to the onboard computing device of at least one vehicle, so that the onboard computing device controls the vehicle to perform parking brake operation upon receiving the parking brake application command; then detecting whether braking status information is received from the onboard computing device; if braking status information is received, displaying the braking status information, which can realize automatic parking brake operation, thereby greatly saving manpower and improving safety after parking.

[0045] The above solution has the following shortcomings:

[0046] First, the aforementioned patent only provides normal brake application and release control. When the on-board computing equipment malfunctions, the brake application and release control cannot be realized, and the vehicle braking function cannot be realized.

[0047] Second, there are no other independent mitigation solutions to deal with braking failure conditions;

[0048] Third, it is not associated with the automatic driving system of the signal system, and therefore cannot achieve remote braking control.

[0049] Chinese patent application CN108454649B, entitled "Remote Relief System for Parking Brakes of Locomotives and EMUs," discloses a remote relief system for parking brakes of locomotives and EMUs. This system includes a parking brake cylinder, a cylinder body, and a pneumatic relief control system. One end of the cylinder body is connected to the parking brake cylinder. A relief rod is fitted inside the parking brake cylinder, sliding through an end cap through-hole and a cylinder body through-hole to expose itself within the cylinder body. A pawl is connected to the relief rod located within the parking brake cylinder. A return spring is fitted onto the relief rod between the end caps. A piston is connected to the relief rod located within the cylinder body. The cylinder body has a vent hole connected to a vent pipe. When pressurized air is introduced into the vent pipe, the piston moves within the cylinder body. The pneumatic relief control system controls the flow of pressurized air to the cylinder body. This system has the advantage of remotely releasing the parking brake regardless of whether there is air pressure in the locomotive or EMU's air duct.

[0050] The above solution has the following shortcomings:

[0051] First, it cannot achieve the release of the electric parking brake;

[0052] Second, the mitigation methods are complex and costly.

[0053] To solve the aforementioned technical problems, the above technical solution involves connecting at least one parking brake motor to the first end of at least one motor interface, and connecting the first end of at least one motor interface to the first end of a switch, thereby connecting the switch and the parking brake motor through the motor interface. The first end of a power interface is connected to the vehicle power supply, and the second end of the power interface is connected to the second end of the switch, thereby connecting the switch and the vehicle power supply through the power interface. The vehicle power supply is connected to at least one parking brake motor via the switch. The switch can connect or disconnect the power supply circuit from the vehicle power supply to at least one parking brake motor. The vehicle power supply can provide a reverse voltage to at least one parking brake motor via the switch, causing the at least one parking brake motor to automatically reverse, thus releasing the brakes. This allows for rapid release of the parking brake and quick brake relief in the event of a malfunction in the electronic parking controller.

[0054] Figure 1 This is a schematic diagram illustrating a parking brake release circuit according to an exemplary embodiment. Please refer to... Figure 1 The parking brake release circuit may include at least one motor interface 10, a power interface 20, and a switch 30.

[0055] At least one motor interface 10 has a first end for connecting at least one parking brake motor 11. The motor interfaces 10 and the parking brake motors 11 are in one-to-one correspondence, and the number of motor interfaces 10 and the number of parking brake motors 11 are the same.

[0056] The first end of the power interface 20 is used to connect to the vehicle power supply 21, the first end of the switch 30 is connected to the second end of at least one motor interface 10, and the second end of the switch 30 is connected to the second end of the power interface 20.

[0057] At least one motor interface 10 has its first end connected to at least one parking brake motor 11, and its second end connected to the first end of switch 30, such that switch 30 and at least one parking brake motor 11 are connected through at least one motor interface 10. The first end of power interface 20 is connected to vehicle power supply 21, and its second end is connected to the second end of switch 30, such that switch 30 and vehicle power supply 21 are connected through power interface 20. Vehicle power supply 21 is connected to at least one parking brake motor 11 through switch 30.

[0058] Switch 30 is used to turn on or off the power supply circuit of the vehicle power supply 21 to at least one parking brake motor 11, wherein the power supply circuit is used to drive the parking brake motor 11 to perform brake release. The turning on or off of switch 30 is controlled by any controller in the vehicle other than the electronic parking controller, or by manual control.

[0059] The power supply circuit is a circuit that connects the vehicle power supply 21 and at least one parking brake motor 11.

[0060] When switch 30 is closed, switch 30 allows the vehicle power supply 21 to supply power to at least one parking brake motor 11, and the power supply circuit is connected; when switch 30 is open, switch 30 does not allow the vehicle power supply 21 to supply power to at least one parking brake motor 11, and the power supply circuit is disconnected.

[0061] The following explanation will use the working principle of a parking brake motor 11 as an example:

[0062] When the power supply circuit is turned on, the current supplied by the vehicle power supply 21 flows through the power supply circuit to the parking brake motor 11, and the parking brake motor 11 will start to work. The working principle of the parking brake motor 11 is usually to use electromagnetic principles or the rotational motion of an electric motor to drive the mechanical components of the parking brake device. For example, in some electric parking brake systems, the parking brake motor 11 can drive a screw or gear mechanism to release the brake caliper from the brake disc, thereby releasing the brake.

[0063] The parking brake motor 11 is connected to the first end of the motor interface 10, and the second end of the switch 30 is connected to the first end of the motor interface 10, so that the switch 30 and the parking brake motor 11 are connected through the motor interface 10. The first end of the power interface 20 is connected to the vehicle power supply 21, and the second end of the switch 30 is connected to the second end of the power interface 20, so that the switch 30 and the vehicle power supply 21 are connected through the power interface 20. The vehicle power supply 21 is connected to the parking brake motor 11 through the switch 30. The power supply circuit of the vehicle power supply 21 to the parking brake motor 11 can be turned on or off by the switch 30. The vehicle power supply 21 can provide a reverse voltage to at least one parking brake motor 11 through the switch 30, so that at least one parking brake motor 11 automatically reverses, realizing brake release. In this way, in the event of a failure of the electronic parking controller, the parking brake can be quickly released and the brake can be quickly released.

[0064] In one possible implementation, the parking brake release circuit may further include: brake release controller 40.

[0065] The brake release controller 40 is connected to the switch 30. The brake release controller 40 is used to control the closing or opening of the switch 30 to conduct or disconnect the power supply circuit of the vehicle power supply 21 to at least one parking brake motor 11.

[0066] When the brake release controller 40 closes the control switch 30, it connects the vehicle power supply 21 to the power supply circuit of at least one parking brake motor 11. When the brake release controller 40 closes the control switch 30, it disconnects the power supply circuit of the vehicle power supply 21 to at least one parking brake motor 11.

[0067] In one possible implementation, the brake relief controller 40 can be an integrated circuit chip with signal processing capabilities. The brake relief controller 40 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a microcontroller unit (MCU), etc.; it can also be a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, a programmable logic controller or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0068] In another possible implementation, the brake relief controller 40 can be the vehicle controller 41.

[0069] By reusing the vehicle's whole vehicle controller 41 as the brake relief controller 40, the cost of purchasing components and the space required for component installation are saved.

[0070] In one possible implementation, please refer to Figure 2The opening or closing of switch 30 is controlled by touch operation on the vehicle's display 51.

[0071] Touch operation refers to a user issuing commands by touching a specific area or button on the display screen. For example, a user can control the opening or closing of switch 30 by touching a virtual button on the screen.

[0072] In one embodiment, the vehicle's display 51 is connected to the brake relief controller 40, which receives touch operations from the user through the vehicle's display 51 and controls the closing or opening of the switch 30 according to the user's touch operations.

[0073] In another embodiment, the vehicle's display 51 is connected to the vehicle's overall controller 41, which receives touch operations from the user through the vehicle's display 51 and controls the closing or opening of the switch 30 according to the user's touch operations.

[0074] In one possible implementation, switch 30 is a manual switch 30.

[0075] A manual switch 30 refers to a switch 30 that requires direct manual operation. The manual switch 30 is closed or opened via a physical button, toggle switch, or other mechanical device. The manual switch 30 does not rely on electronic signals or automatic control; instead, it changes the circuit state through mechanical action.

[0076] By setting up a manual switch 30, which does not rely on electronic signals and has high reliability and anti-interference capability, the parking brake release circuit also has high reliability and anti-interference capability.

[0077] In one possible implementation, switch 30 is a remote control switch 30.

[0078] For example, control signals can be sent via a wireless remote control, a mobile application, or a signal system to control the on / off state.

[0079] In one embodiment, the parking brake release circuit may include a communication module, which can receive remote control signals.

[0080] In another embodiment, the remote control switch can interact with the control center via the vehicle's signaling system.

[0081] By setting up the remote control switch 30, users can operate the device from a location far from the vehicle, improving ease of use.

[0082] This disclosure also provides a vehicle, which includes: at least one parking brake motor 11, an on-board power supply 21, an electronic parking controller 61, and the parking brake release circuit described above.

[0083] The electronic parking controller 61 is connected to at least one parking control motor 11 and is used to control the operation of at least one parking control motor 11, thereby realizing the application and release of the parking brake.

[0084] In another embodiment, please refer to Figure 2 To increase braking force, more electronic parking controllers 61 and their corresponding at least one parking brake motor 11 can be added. Each added electronic parking controller 61 and its corresponding parking brake motor 11 is connected to a switch 30 in the parking brake release circuit. Correspondingly, the number of switches 30 should also be equal to the number of electronic parking controllers 61. Each switch 30 corresponds one-to-one with an electronic parking controller 61. In the event of a failure of one electronic parking controller 61, the switch 30 corresponding to that controller can connect or disconnect the power supply circuit of the vehicle power supply 21 to at least one parking brake motor 11.

[0085] In one possible implementation, the parking brake release circuit may further include a brake release controller 40.

[0086] The brake release controller 40 is connected to the electronic parking controller 61. The brake release controller 40 is used to detect the working status of the electronic parking controller 61 and control the vehicle's display 51 to display the working status of the electronic parking controller 61.

[0087] The brake release controller 40 is connected to the electronic parking brake controller 61 and is mainly responsible for monitoring the working status of the electronic parking brake controller 61 and forwarding the working status to the vehicle's display 51 for display, so that the user can know in real time whether the electronic parking brake controller 61 is malfunctioning. If the user knows that the electronic parking brake controller 61 is malfunctioning and needs to release the brake, he can control the switch 30 to close, thereby conducting the power supply circuit from the vehicle power supply 21 to the parking brake motor 11, and quickly release the brake.

[0088] When there are multiple electronic parking controllers 61, the brake release controller 40 is connected to each electronic parking controller 61, monitors the operating status of each electronic parking controller 61, and forwards the operating status to the vehicle's display 51 for display, so that the user can know in real time whether each electronic parking controller 61 is faulty. If the user learns that a certain electronic parking controller 61 is faulty and needs brake release, he can control the corresponding switch 30 to close, thereby conducting the power supply circuit of the vehicle power supply 21 to the corresponding parking brake motor 11, and quickly release the brake.

[0089] In one possible implementation, the vehicle power supply 21 is a vehicle battery.

[0090] In one possible implementation, the parking brake motor 11 is a brushed clamp motor.

[0091] The brushed caliper motor releases the brakes by changing the supply voltage. Initially, the brushed caliper motor is stationary, and the brake is engaged. When braking needs to be released, the on-board power supply 21 applies a specific voltage to the brushed caliper motor. The brushed caliper motor rotates according to the voltage magnitude and direction, driving the brake from the engaged state to the released state via a mechanical device. After braking is released, the voltage is cut off, the brushed caliper motor stops, and the brake remains in the released state.

[0092] In one embodiment, see Figure 2 The parking brake motor 11 is used to apply and release the electronic parking brake. Electronic parking controllers 1 and 2 control the forward and reverse rotation of the parking brake motor 11 to achieve braking and release. The vehicle controller 41 controls the opening and closing of switch 30 and can interact with all other controllers and signal systems in the vehicle via network signals. The vehicle display 51 displays vehicle status and faults and can interact with the vehicle controller 41 via network signals through touchscreen control. The vehicle display 51 can send relevant instructions selected by the touchscreen to the vehicle controller 41. The onboard power supply 21 provides low-voltage power to the parking brake motors 1, 2, 3, and 4 and the aforementioned controllers. The signal system controls the vehicle's automatic driving and interacts with the vehicle controller 41 and the ground control center via network signals. The ground control center interacts with the signal system, monitors vehicle status, and issues control commands to the vehicle.

[0093] Please see Figure 3 This solution can achieve three mitigation methods:

[0094] Relief Method 1:

[0095] The vehicle controller 41 receives real-time status updates from electronic parking controllers 1 and 2. Upon receiving a fault report for either electronic parking controller 1 or 2, the vehicle controller 41 sends the fault information to the vehicle's display 51, which then displays the fault information on a pop-up screen. When the vehicle's display 51 shows a fault in electronic parking controller 1, the corresponding switch 30 can be manually closed (the release switch 30 is closed after *a* seconds; the duration of *a* seconds depends on the product's characteristics; the parking brake should release after *a* seconds). The vehicle power supply 21 will then directly supply power to parking brake motors 1 and 2. Upon power-up, the parking brake motors will automatically reverse, releasing the electronic parking brake of the corresponding caliper. Similarly, when the vehicle display shows a fault in electronic parking controller 2, the corresponding switch 30 can be manually closed. The vehicle power supply 21 will then directly supply power to parking brake motors 3 and 4. Upon power-up, the parking brake motors will automatically reverse, releasing the electronic parking brake of the corresponding caliper.

[0096] Relief Method Two:

[0097] The vehicle controller 41 receives the status of the electronic parking controllers 1 and 2 in real time. When a fault is detected in either electronic parking controller 1 or 2, the vehicle controller 41 sends the fault information to the vehicle's display 51. The vehicle's display 51 displays the fault information on a pop-up screen. The parking brake release button on the display is manually touched, and the vehicle's display 51 sends the corresponding release information to the vehicle controller 41. Based on the received information, the vehicle controller 41 controls the corresponding switch 30 to close for a seconds and then open. When the switch 30 is engaged, the vehicle power supply 21 directly supplies power to the parking brake motor 11. After the parking brake motor 11 is powered on, it automatically reverses to release the electronic parking brake of the corresponding caliper.

[0098] Relief Method 3:

[0099] The vehicle controller 41 receives the status of electronic parking controllers 1 and 2 in real time. When a fault is detected in either electronic parking controller 1 or 2, the vehicle controller 41 forwards the fault information to the signal system. After receiving the fault information, the signal system forwards it to the ground control center. The control center personnel can remotely issue a release command to the signal system. When the signal system receives the corresponding release command, it forwards the corresponding parking active release command to the vehicle controller 41. The vehicle controller 41 controls the corresponding switch 30 to close for a seconds and then open it according to the received release command. When the switch 30 is closed, the vehicle power supply 21 will directly supply power to the parking brake motor 11. After the parking brake motor 11 is powered on, it will automatically reverse and release the electronic parking brake of the corresponding caliper.

[0100] This disclosure also provides a rail vehicle, including: at least one parking brake motor 11, an on-board power supply 21, an electronic parking controller 61, and the parking brake release circuit described above.

[0101] The electronic parking controller 61 is connected to at least one parking control motor 11 and is used to control the operation of at least one parking control motor 11, thereby realizing the application and release of the parking brake.

[0102] At least one parking brake motor 11, on-board power supply 21, electronic parking controller 61, and the aforementioned parking brake release circuit together constitute a parking brake unit.

[0103] In one possible implementation, the rail vehicle also includes multiple carriages, and multiple parking brake release circuits, with each carriage and each parking brake release circuit corresponding to the other.

[0104] One car body corresponds to one parking brake unit, which is used to apply parking brake and release brake to the corresponding car body.

[0105] The independent parking brake release circuit provided in this disclosure enables control of the parking brake motor in the event of a failure of the electronic parking controller. Furthermore, this solution is associated with the vehicle controller and signal system, and can realize three methods for quickly releasing the electronic parking brake, thereby rapidly restoring line operation and ensuring operational reliability.

[0106] The parking brake release circuit disclosed herein has the following advantages:

[0107] First, there is an independent parking brake motor control circuit. When the electronic parking controller fails, the parking brake motor can be directly controlled to alleviate the parking brake effect.

[0108] Second, the parking brake release circuit is connected to the vehicle controller, which communicates with the touch screen display. The parking brake motor corresponding to the faulty electronic parking controller can be released through the user's touch screen display.

[0109] Third, the parking brake release circuit is connected to the vehicle controller, and the vehicle controller communicates with the signal system. The remote control center can send commands to release the parking brake motor corresponding to the faulty electronic parking controller.

[0110] Fourth, the parking brake release circuit has a manually controlled switch, allowing for direct and quick manual control of the parking brake motor corresponding to the faulty electronic parking controller.

[0111] Fifth, the parking brake release circuit is reliable, low-cost, and easy and quick to operate.

[0112] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0113] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0114] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A parking brake release circuit, characterized in that, include: At least one motor interface, the first end of which is used to connect at least one parking brake motor, and the motor interface and the parking brake motor correspond one-to-one; A power interface, the first end of which is used to connect to the vehicle power supply. A switch, wherein a first end of the switch is connected to a second end of the at least one motor interface, and a second end of the switch is connected to a second end of the power interface; The switch is used to turn on or off the power supply circuit of the vehicle power supply to the at least one parking brake motor, wherein the power supply circuit is used to drive the parking brake motor to perform braking relief. The turning on or off of the switch is controlled by any controller in the vehicle other than the electronic parking controller, or by manual control.

2. The parking brake release circuit according to claim 1, characterized in that, The parking brake release circuit also includes: a brake release controller; The brake release controller is connected to the switch and is used to control the closing or opening of the switch to connect or disconnect the power supply circuit of the vehicle power supply to the at least one parking brake motor.

3. The parking brake release circuit according to claim 2, characterized in that, The brake release controller is the vehicle's overall control system.

4. The parking brake release circuit according to claim 1, characterized in that, The opening or closing of the switch is controlled by touch operation on the vehicle's display.

5. The parking brake release circuit according to claim 1, characterized in that, The switch is a manual switch.

6. The parking brake release circuit according to claim 1, characterized in that, The switch is a remote control switch.

7. A vehicle, characterized in that, include: At least one parking brake motor; Vehicle power supply; An electronic parking controller, wherein the electronic parking controller is connected to the at least one parking control motor; The parking brake release circuit according to any one of claims 1-6.

8. The vehicle according to claim 7, characterized in that, The parking brake release circuit also includes a brake release controller; The brake release controller is connected to the electronic parking brake controller. The brake release controller is used to detect the working status of the electronic parking brake controller and control the vehicle's display to show the working status of the electronic parking brake controller.

9. The vehicle according to claim 7, characterized in that, The vehicle power source is a vehicle battery.

10. The vehicle according to claim 7, characterized in that, The parking brake motor is a brushed clamp motor.

11. A rail vehicle, characterized in that, include: At least one parking brake motor; Vehicle power supply; An electronic parking controller, wherein the electronic parking controller is connected to the at least one parking control motor; The parking brake release circuit according to any one of claims 1-6.

12. The rail vehicle according to claim 11, characterized in that, The rail vehicle also includes multiple carriages, and there are multiple parking brake release circuits, with each carriage and each parking brake release circuit corresponding to the other.

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