Vehicle discharge control methods, devices and vehicles

Abstract

This invention discloses a vehicle discharge control method, device, and vehicle. The method includes: responding to receiving a discharge command from the vehicle, controlling the motor controller of the vehicle's motor to enter a preset enabled state; based on the preset enabled state, controlling the motor to perform a power-down operation to obtain a power-down result, wherein the power-down result indicates whether the motor was successfully powered down; responding to the power-down result being that the motor was successfully powered down, based on the current state of the high-voltage interlock circuit in the vehicle, controlling the battery relay of the vehicle's power battery to disconnect to obtain a disconnection result, wherein the disconnection result indicates whether the battery relay was successfully disconnected; responding to the successful disconnection of the battery relay, controlling the vehicle to perform a discharge operation to obtain a discharge result, wherein the discharge result indicates whether the vehicle has completed discharging. This invention solves the technical problem of low control efficiency in vehicle discharge in related technologies.

Description

Technical Field

[0001] This invention relates to the field of vehicle control, and more specifically, to a method, apparatus, and vehicle for controlling vehicle discharge. Background Technology

[0002] When a new energy vehicle is involved in a traffic accident, the presence of high-voltage components may cause electric shock to the driver and passengers. Current related technologies mainly involve connecting a capacitor module and an active discharge module in parallel. The capacitor module is used to connect to external electrical equipment. The capacitor module and the active discharge module together form the vehicle's active discharge circuit to meet the vehicle's active and passive discharge requirements. However, this technology still poses a risk of electric shock to personnel and has low control efficiency for vehicle discharge.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a method, apparatus, and vehicle for controlling vehicle discharge, in order to at least solve the technical problem of low control efficiency of vehicle discharge in related technologies.

[0005] According to one aspect of the present invention, a vehicle discharge control method is provided, comprising: responding to receiving a discharge command from the vehicle, controlling a motor controller of a motor in the vehicle to enter a preset enabled state; based on the preset enabled state, controlling the motor to perform a power-down operation to obtain a power-down result, wherein the power-down result indicates whether the motor has been successfully powered down; responding to the power-down result being that the motor has been successfully powered down, controlling a battery relay of a power battery in the vehicle to disconnect based on the current state of the high-voltage interlock circuit in the vehicle to obtain a disconnection result, wherein the disconnection result indicates whether the battery relay has been successfully disconnected; and responding to the successful disconnection of the battery relay, controlling the vehicle to perform a discharge operation to obtain a discharge result, wherein the discharge result indicates whether the vehicle has completed discharging.

[0006] Optionally, in response to the successful disconnection of the battery relay, the vehicle is controlled to perform a discharge operation to obtain a discharge result, including: in response to the successful disconnection of the battery relay, the motor is controlled to perform a discharge operation based on a preset speed to obtain a motor discharge result, wherein the motor discharge result is used to indicate whether the motor has completed discharging; in response to the motor discharge result being that the motor has completed discharging, the preset controller of the vehicle is controlled to enter a sleep state at a preset time point.

[0007] Optionally, in response to the power-down result being that the motor is successfully powered down, based on the current state of the high-voltage interlock circuit in the vehicle, the battery relay of the power battery in the vehicle is controlled to disconnect, resulting in a disconnection result. This includes: in response to the power-down result being that the motor is successfully powered down and the current state of the high-voltage interlock circuit is a preset state, the vehicle is controlled to execute the control operation corresponding to the current state parameters according to the current state parameters of the vehicle, resulting in an execution result, wherein the execution result is used to indicate whether the vehicle has completed the control operation; in response to the execution result being that the vehicle has completed the control operation, the battery relay is controlled to disconnect, resulting in a disconnection result.

[0008] Optionally, the vehicle is controlled to perform control operations corresponding to the current state parameters based on the current state parameters, and the execution results are obtained, including: determining the current gear, engine hood state, and vehicle speed based on the current state parameters; responding to the current gear being a first preset gear, and / or the engine hood being in a closed state, and / or the vehicle speed being greater than a preset vehicle speed, controlling the vehicle to perform a control operation to enter the vehicle limp mode; responding to the current gear being a second preset gear, and / or the engine hood being in an open state, and / or the vehicle speed being less than a preset vehicle speed, controlling the vehicle to perform a control operation to power down the engine, preset air conditioner, drive motor, and DC converter.

[0009] Optionally, in response to the execution result that the vehicle has completed the control operation, the battery relay is disconnected to obtain a disconnection result, including: in response to the execution result that the vehicle has completed the control operation, the pre-charge relay in the battery relay is disconnected to obtain a first disconnection result, wherein the first disconnection result is used to indicate whether the pre-charge relay has successfully disconnected; in response to the first disconnection result that the pre-charge relay has successfully disconnected, the main positive relay in the battery relay is disconnected to obtain a second disconnection result, wherein the second disconnection result is used to indicate whether the main positive relay has successfully disconnected; in response to the second disconnection result that the main positive relay has successfully disconnected, the main negative relay in the battery relay is disconnected to obtain a third disconnection result, wherein the third disconnection result is used to indicate whether the main negative relay has successfully disconnected; in response to the third disconnection result that the main negative relay has successfully disconnected, it is determined that the battery relay has successfully disconnected.

[0010] Optionally, in response to the successful disconnection of the battery relay, the motor is controlled to perform a discharge operation based on a preset speed to obtain a discharge result. The discharge result is used to indicate whether the motor has completed discharging, including: in response to the successful disconnection of the battery relay, the motor is controlled to perform a discharge operation based on a preset speed, and the capacitor voltage of the motor is monitored in real time; in response to the capacitor voltage being less than a preset voltage, the discharge result is determined to be that the motor has completed discharging.

[0011] Optionally, the above method further includes: generating a vehicle discharge command in response to receiving a status update command that updates the key status of the vehicle from a power-on state to a power-off state.

[0012] According to another aspect of the present invention, a vehicle discharge control device is also provided, comprising: a first control module, configured to control the motor controller of the motor in the vehicle to enter a preset enabled state in response to receiving a discharge command from the vehicle; a second control module, configured to control the motor to perform a power-down operation based on the preset enabled state, and obtain a power-down result, wherein the power-down result indicates whether the motor has been successfully powered down; a third control module, configured to control the battery relay of the power battery in the vehicle to disconnect based on the current state of the high-voltage interlock circuit in the vehicle in response to the power-down result indicating that the motor has been successfully powered down, and obtain a disconnection result, wherein the disconnection result indicates whether the battery relay has been successfully disconnected; and a fourth control module, configured to control the vehicle to perform a discharge operation in response to the successful disconnection of the battery relay, and obtain a discharge result, wherein the discharge result indicates whether the vehicle has completed discharging.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the execution of the vehicle discharge control method described above in the processor of the device.

[0014] According to another aspect of the present invention, a vehicle is also provided, characterized in that it includes: one or more processors; a storage device for storing one or more programs; and a vehicle discharge control method that, when the one or more programs are executed by the one or more processors, causes the one or more processors to perform any of the above-described methods.

[0015] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the above-described vehicle swapping station matching method during runtime.

[0016] In this embodiment of the invention, in response to receiving a discharge command from the vehicle, the motor controller of the motor in the vehicle is controlled to enter a preset enabled state; based on the preset enabled state, the motor is controlled to perform a power-down operation, resulting in a power-down result; in response to the power-down result being a successful motor power-down, based on the current state of the high-voltage interlock circuit in the vehicle, the battery relay of the power battery in the vehicle is controlled to disconnect, resulting in a disconnection result; in response to the successful disconnection of the battery relay, the vehicle is controlled to perform a discharge operation, resulting in a discharge result. Through the above method, while ensuring successful motor power-down, the battery relay of the power battery in the vehicle is disconnected; and while ensuring the battery relay is successfully disconnected, the vehicle is controlled to perform a discharge operation. This achieves the goal of ensuring the vehicle can safely complete high-voltage power-down, thereby improving the control efficiency of vehicle discharge and solving the technical problem of low control efficiency in vehicle discharge in related technologies. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart of a vehicle discharge control method according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of a motor rapid discharge control according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a high-voltage interlock circuit design according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of a battery relay disconnection control according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of a fast discharge function interface design according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of a fast discharge function network communication design according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of a hybrid electric vehicle powertrain configuration according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of a vehicle discharge control device according to an embodiment of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] Example 1

[0029] According to an embodiment of the present invention, a method for controlling vehicle discharge is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0030] Figure 1 This is a flowchart of a vehicle discharge control method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0031] In step S102, in response to receiving the vehicle's discharge command, the motor controller of the motor in the vehicle enters a preset enable state.

[0032] Here, the discharge command can be understood as the command issued by the vehicle to reduce the voltage of the capacitor in the motor system to within a safe voltage range by discharging. The motor controller can be understood as a device used to control the motor. The preset enable state can be understood as the preset state of the motor controller used for vehicle discharge, i.e., the disabled state.

[0033] Understandably, when a vehicle needs to discharge, a discharge command can be sent. Upon receiving the discharge command, the motor controller that controls the motor in the vehicle enters a preset enabled state to control the vehicle to discharge.

[0034] In one optional embodiment, when a traffic accident occurs, the driver may press the discharge button in the vehicle to issue a discharge command, or the vehicle may automatically trigger the discharge command when it detects a collision. That is, the vehicle controller (HCU) may send a discharge command to the motor control unit (MCU), or the MCU may activate the motor controller to discharge itself.

[0035] Step S104: Based on a preset enable state, control the motor to perform a power-down operation and obtain a power-down result. The power-down result indicates whether the motor was successfully powered down.

[0036] The power-down operation can be understood as turning off all power to the vehicle, including the engine, lights, and all other equipment. The power-down result indicates whether the motor was successfully powered down.

[0037] Understandably, when the vehicle is in a preset enabled state, the motor can be controlled to perform a power-off operation, and it can be confirmed whether the motor has been successfully powered off.

[0038] In one alternative embodiment, power can be cut off by controlling devices such as the engine, high-voltage air conditioner, drive motor, and DC-DC converter.

[0039] In step S106, in response to the power-down result being that the motor was successfully powered down, based on the current state of the high-voltage interlock circuit in the vehicle, the battery relay of the power battery in the vehicle is controlled to disconnect, and the disconnection result is obtained.

[0040] The current state of the high-voltage interlock circuit can include a disconnected state or a connected state. The battery relay can be understood as a device that controls the connection or disconnection of the battery with the equipment in the vehicle. The disconnection result is used to indicate whether the battery relay has been successfully disconnected.

[0041] Understandably, disconnecting the battery relay of the vehicle's power battery after ensuring successful motor power-off can guarantee the safe disconnection of the battery relay.

[0042] In one alternative embodiment, the battery relay of the vehicle's power battery can be disconnected by controlling the battery management system (BMS) to achieve the disconnection result.

[0043] In step S108, in response to the successful disconnection of the battery relay, the vehicle is controlled to perform a discharge operation to obtain the discharge result.

[0044] The discharge operation can be understood as the discharge result indicating whether the vehicle has completed the discharge process.

[0045] Understandably, controlling the vehicle to perform a discharge operation while ensuring the battery relay is successfully disconnected can guarantee the safe completion of the discharge process.

[0046] In one alternative embodiment, the vehicle can be controlled by an MCU to perform a discharge operation and obtain the discharge result.

[0047] Through the above steps, in response to receiving a discharge command from the vehicle, the motor controller of the vehicle's motor enters a preset enabled state; based on the preset enabled state, the motor is controlled to perform a power-down operation, resulting in a power-down result; in response to the successful power-down result, based on the current state of the high-voltage interlock circuit in the vehicle, the battery relay of the vehicle's power battery is controlled to disconnect, resulting in a disconnection result; in response to the successful disconnection of the battery relay, the vehicle is controlled to perform a discharge operation, resulting in a discharge result. By using this method, while ensuring successful motor power-down, the battery relay of the vehicle's power battery is disconnected; and while ensuring the battery relay is successfully disconnected, the vehicle is controlled to perform a discharge operation. This achieves the goal of ensuring the vehicle can safely complete high-voltage power-down, thereby improving the control efficiency of vehicle discharge and solving the technical problem of low control efficiency in vehicle discharge in related technologies.

[0048] Optionally, in response to the successful disconnection of the battery relay, the vehicle is controlled to perform a discharge operation to obtain a discharge result, including: in response to the successful disconnection of the battery relay, the motor is controlled to perform a discharge operation based on a preset speed to obtain a motor discharge result; in response to the motor discharge result being that the motor discharge is complete, the preset controller of the vehicle is controlled to enter a sleep state at a preset time point.

[0049] Among them, the preset speed can be understood as a low speed preset in advance, such as 50 rpm, but not limited to this. The motor discharge result is used to indicate whether the motor has completed discharging. The preset controller can be understood as a controller that needs to go into sleep mode after the motor has completed discharging. The preset time point can be understood as a time point that is preset in advance after the motor has completed discharging, such as 5 minutes after the motor has completed discharging.

[0050] Specifically, the above steps can be understood as follows: After all the high-voltage relays of the battery have been disconnected, including the pre-charge relay, the main positive relay, and the main negative relay, the HCU should send a motor fast discharge request signal to the MCU. After receiving the signal, the MCU determines whether the motor system allows fast discharge. If it does, the MCU needs to send a motor fast discharge permission signal to the HCU and control the motor to enter the fast discharge process, discharging the voltage in the capacitor through a pre-designed circuit, and sending the motor capacitor voltage signal to the HCU in real time. When the motor capacitor voltage is less than 60V, the motor fast discharge is completed. After the HCU detects that the motor fast discharge is complete, it informs each controller. After a specified time, each controller enters sleep mode, and finally the vehicle is safely powered off.

[0051] Figure 2 This is a schematic diagram of a rapid discharge control for a motor according to an embodiment of the present invention, as shown below. Figure 2 As shown, when the key status signal is "key on", the motor controller enable signal is "enabled", the motor power-off status signal is "no power-off trigger", all battery relays remain unchanged, the motor fast discharge request signal is "no fast discharge request", and the motor capacitor voltage signal is greater than 300V. When the key status signal is "key off", the motor controller enable signal is "disabled", the motor power-off status signal is "power-off trigger" (power-off enabled), all battery relays are off, the motor fast discharge request signal is "fast discharge request present", and the motor capacitor voltage signal actively discharges until it is less than 60V.

[0052] Optionally, in response to the power-down result being that the motor is successfully powered down, based on the current state of the high-voltage interlock circuit in the vehicle, the battery relay of the power battery in the vehicle is controlled to disconnect, resulting in a disconnection. This includes: in response to the power-down result being that the motor is successfully powered down and the current state of the high-voltage interlock circuit is a preset state, the vehicle is controlled to execute the control operation corresponding to the current state parameters according to the current state parameters of the vehicle, resulting in an execution result; in response to the execution result being that the vehicle has completed the control operation, the battery relay is controlled to disconnect, resulting in a disconnection.

[0053] Among them, the preset state can be understood as a pre-set state where the high-voltage interlock circuit is disconnected, the current state parameter can be understood as the specific parameters of the current state of the vehicle, such as the current vehicle speed and the current vehicle gear, the control operation can be an operation based on the current state parameter, such as controlling the vehicle speed and controlling the vehicle gear, and the execution result is used to indicate whether the vehicle has completed the control operation.

[0054] Understandably, if the high-voltage interlock circuit is found to disconnect before the relay disconnects, the HCU needs to control the vehicle to perform the control operation corresponding to the current state parameters based on the vehicle's current state parameters. After the vehicle completes the control operation, it controls the battery relay to disconnect, thus obtaining the disconnection result.

[0055] Figure 3 This is a schematic diagram of a high-voltage interlock circuit design according to an embodiment of the present invention, as shown below. Figure 3 As shown, the high-voltage interlock circuit includes the vehicle controller, battery management system (BMS), motor controller, and high-voltage air conditioning controller. The vehicle controller and BMS interact via a Controller Area Network (CAN). The BMS outputs signals to the motor controller, which in turn outputs signals to the high-voltage air conditioning controller. The high-voltage air conditioning controller then sends signals back to the BMS. Only when the interlock circuit forms a complete closed loop does the BMS consider the high-voltage components of the vehicle to be in normal condition and allow the high-voltage power supply to be connected. When the high-voltage interlock circuit is broken, a high-voltage interlock disconnection signal will be triggered. The high-voltage interlock circuit is designed to verify the integrity of the vehicle's high-voltage electrical system. When the BMS detects a circuit break or a breach in integrity, necessary safety measures need to be initiated.

[0056] In this embodiment of the invention, when the BMS detects an abnormal disconnection of the high-voltage interlock circuit, it needs to trigger the vehicle's power-off protection function. Furthermore, after the high-voltage interlock is disconnected, the BMS sends a high-voltage interlock disconnection message to the vehicle controller HCU, and then the BMS needs to disconnect the relay of the power battery pack to ensure vehicle safety.

[0057] Optionally, the vehicle is controlled to perform control operations corresponding to the current state parameters based on the current state parameters, and the execution results are obtained, including: determining the current gear, engine hood state, and vehicle speed based on the current state parameters; responding to the current gear being a first preset gear, and / or the engine hood being in a closed state, and / or the vehicle speed being greater than a preset vehicle speed, controlling the vehicle to perform a control operation to enter the vehicle limp mode; responding to the current gear being a second preset gear, and / or the engine hood being in an open state, and / or the vehicle speed being less than a preset vehicle speed, controlling the vehicle to perform a control operation to power down the engine, preset air conditioner, drive motor, and DC converter.

[0058] Among them, the current gear can be understood as the gear that the vehicle is currently in; the engine hood status can include open or closed; the first preset gear can be understood as a pre-set gear that is considered to be the gear for normal vehicle driving, such as Drive (D) or Reverse (R); the preset speed can be understood as a pre-set speed that is considered to be the normal speed for vehicle driving, such as 5 km / h, but not limited to this; the vehicle limp mode can be understood as the vehicle reducing speed and power output in order to protect the engine and drive system in the event of engine failure or other emergency; the second preset gear can be understood as a pre-set gear that is considered to be the gear when the vehicle is about to stop or has already stopped, such as Park (P) or Neutral (N); and the preset air conditioning can be understood as a pre-set air conditioning that needs to be controlled to shut down, such as a high-pressure air conditioning unit.

[0059] Specifically, the above process can be understood as follows: if the vehicle is in D or R gear and the engine hood is closed, or the vehicle speed is greater than 5 km / h, the HCU controls the power system to enter the vehicle limp mode. In this mode, the vehicle speed and output torque will be limited. If the gear is in P or N gear, or the engine hood is open, or the vehicle speed is less than 5 km / h, the HCU controls the engine, high-pressure air conditioning, drive motor, and DC converter to shut down, and at the same time controls the BMS to disconnect the relay.

[0060] Optionally, in response to the execution result that the vehicle has completed the control operation, the battery relay is disconnected to obtain a disconnection result, including: in response to the execution result that the vehicle has completed the control operation, the precharge relay in the battery relay is disconnected to obtain a first disconnection result; in response to the first disconnection result that the precharge relay is successfully disconnected, the main positive relay in the battery relay is disconnected to obtain a second disconnection result; in response to the second disconnection result that the main positive relay is successfully disconnected, the main negative relay in the battery relay is disconnected to obtain a third disconnection result; in response to the third disconnection result that the main negative relay is successfully disconnected, it is determined that the battery relay is successfully disconnected.

[0061] The precharge relay can be understood as an electrical component used to reduce the initial current peak by momentarily connecting a lower load before starting a high-power load. The main positive relay and the main negative relay refer to the positive and negative switches in the control circuit, respectively, used to control the on / off state of high-power equipment or mechanical devices. The first disconnection result indicates whether the precharge relay has successfully disconnected, the second disconnection result indicates whether the main positive relay has successfully disconnected, and the third disconnection result indicates whether the main negative relay has successfully disconnected.

[0062] Specifically, the above process can be understood as follows: When the BMS receives the relay disconnect command sent by the HCU, the BMS controls the three relays to disconnect in the following order: When the vehicle key is in the off state and the motor is enabled and powered off, the HCU sends a pre-charge relay disconnect command, and the BMS responds and completes the disconnection of the power battery pre-charge relay; after the pre-charge relay is disconnected, the HCU sends a main positive relay disconnect command, and the BMS responds and completes the disconnection of the power battery main positive relay; after the main positive relay is disconnected, the HCU sends a main negative relay disconnect command, and the BMS responds and completes the disconnection of the power battery main negative relay.

[0063] Figure 4 This is a schematic diagram of a battery relay disconnection control according to an embodiment of the present invention, as shown below. Figure 4 As shown, when the key status signal is "key powered on", the precharge relay control signal sends a closing command, and the precharge relay status signal is closed. The main positive relay control signal sends a closing command, and the main positive relay status signal is closed. The main negative relay control signal sends a closing command, and the main negative relay status signal is closed. When the key status signal is "key powered off", the precharge relay control signal sends a disconnect command, and the precharge relay status signal is open. The main positive relay control signal sends a disconnect command, and the main positive relay status signal is open. The main negative relay control signal sends a disconnect command, and the main negative relay status signal is open.

[0064] Optionally, in response to the successful disconnection of the battery relay, the motor is controlled to perform a discharge operation based on a preset speed to obtain a discharge result. The discharge result is used to indicate whether the motor has completed discharging, including: in response to the successful disconnection of the battery relay, the motor is controlled to perform a discharge operation based on a preset speed, and the capacitor voltage of the motor is monitored in real time; in response to the capacitor voltage being less than a preset voltage, the discharge result is determined to be that the motor has completed discharging.

[0065] The preset voltage can be understood as a pre-set voltage, which can be considered as the voltage at which the motor has finished discharging. For example, it can be 60V, but it is not limited to this.

[0066] Understandably, after the battery relay is successfully disconnected, it is necessary to monitor the motor's capacitor voltage in real time. When the motor's capacitor voltage is less than or equal to 60V, it can be considered that the motor has finished discharging, and at this time the MCU can be controlled to exit the rapid discharge process.

[0067] Optionally, the above method further includes: generating a vehicle discharge command in response to receiving a status update command that updates the key status of the vehicle from a power-on state to a power-off state.

[0068] The status update command can be understood as the command that controls the key status of the vehicle to change from the power-on state to the power-off state.

[0069] It is understandable that when the vehicle's key status needs to be updated from the power-on state to the power-off state, it can be assumed that a vehicle discharge command can be generated at this time.

[0070] Figure 5 This is a schematic diagram of a fast discharge function interface design according to an embodiment of the present invention, such as... Figure 5 As shown, the motor controller reports the motor's control status and bus capacitor voltage in real time and prepares to implement the rapid discharge function. Simultaneously, it monitors the motor speed in real time via a speed sensor. The battery management system receives relay control commands from the vehicle controller to control the corresponding relays, including the pre-charge relay, main negative relay, and main positive relay, and reports the relay status. The vehicle key reports its status signal to the vehicle controller via the gateway controller. The gateway controller forwards the vehicle key's status signal. The vehicle controller primarily determines whether to send a rapid discharge command based on the key signal, motor control status, and the status of the high-voltage relays of the power battery. When all conditions are met, the vehicle controller sends a discharge command to the motor controller, which then controls the motor system to perform rapid discharge.

[0071] Figure 6 This is a schematic diagram of a fast discharge function network communication design according to an embodiment of the present invention, as shown below. Figure 6 As shown, after the driver operates the vehicle key, the gateway controller detects the current key status and sends a key status signal (signal 1) to the vehicle controller. The vehicle controller identifies the vehicle's power-on / off status based on the key status signal. The battery management system sends three relay status signals (main positive, main negative, and pre-charge relays) (signals 2, 3, and 4) to the vehicle controller and motor controller to inform the vehicle controller of the status of the high-voltage relays of the power battery. The vehicle controller sends three relay control command signals (such as the opening or closing commands of the main positive, main negative, and pre-charge relays) to the battery management system (signals 5, 6, and 7) to inform the battery management system to control the status of the high-voltage relays of the power battery. The motor controller sends motor capacitor voltage signals, motor power-off permission signals, and motor fast discharge permission signals (signals 8, 9, and 10) to the vehicle controller to inform the vehicle controller of the motor system status, whether it is powered off, and whether fast discharge can be performed. The vehicle controller sends motor controller enable request signals and motor fast discharge request signals (signals 11 and 12) to the motor controller to inform the motor controller when to enter the motor fast discharge phase.

[0072] Specifically, the senders and receivers of the signals for each fast discharge function network can be seen in Table 1 below:

[0073] Table 1 Network Signals for Fast Discharge Function

[0074] Serial Number Signal name sender Recipient 1 Key status signal Gateway Controller HCU 2 Main positive relay status signal BMS HCU, MCU 3 Main negative relay status signal BMS HCU, MCU 4 Precharge relay status signal BMS HCU, MCU 5 Main positive relay control signal HCU BMS 6 Main negative relay control signal HCU BMS 7 Precharge relay control signal HCU BMS 8 Motor capacitor voltage signal MCU HCU 9 Motor power-off status signal MCU HCU 10 Motor rapid discharge enable signal MCU HCU 11 Motor controller enable signal HCU MCU 12 Motor fast discharge request signal HCU MCU

[0075] Figure 7 This is a schematic diagram of a hybrid electric vehicle powertrain configuration according to an embodiment of the present invention, as shown below. Figure 7 As shown, its powertrain configuration mainly consists of an engine, drive motor, power battery, DC-DC converter, gearbox, clutch, drive shaft, and 12V battery. One side of the drive motor is connected to the engine via a clutch, and the other side is connected to the gearbox. Each component is controlled by its own controller. Specifically, these include an engine control system, a vehicle controller, a motor controller, a battery management system, a gearbox controller, and a gateway system (not shown in the diagram).

[0076] Example 2

[0077] According to another aspect of the present invention, a vehicle discharge control device is also provided. This device can execute the vehicle discharge control method in Embodiment 1 above. The specific implementation scheme and application scenario in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0078] Figure 8 This is a schematic diagram of a vehicle discharge control device according to an embodiment of the present invention, such as... Figure 8 As shown, the device includes: a first control module 802, used to control the motor controller of the motor in the vehicle to enter a preset enabled state in response to receiving a discharge command from the vehicle; a second control module 804, used to control the motor to perform a power-down operation based on the preset enabled state, and obtain a power-down result, wherein the power-down result is used to indicate whether the motor was successfully powered down; a third control module 806, used to control the battery relay of the power battery in the vehicle to disconnect based on the current state of the high-voltage interlock circuit in the vehicle in response to the power-down result being that the motor was successfully powered down, and obtain a disconnection result, wherein the disconnection result is used to indicate whether the battery relay was successfully disconnected; and a fourth control module 808, used to control the vehicle to perform a discharge operation in response to the successful disconnection of the battery relay, and obtain a discharge result, wherein the discharge result is used to indicate whether the vehicle has completed discharging.

[0079] The fourth control module 808 includes: a discharge control unit, used to control the motor to perform a discharge operation based on a preset speed in response to the successful disconnection of the battery relay, and obtain the motor discharge result, wherein the motor discharge result is used to indicate whether the motor has completed discharging; and a sleep control unit, used to control the vehicle's preset controller to enter a sleep state at a preset time point in response to the motor discharge result indicating that the motor has completed discharging.

[0080] The third control module 806 includes: a parameter control unit, used to control the vehicle to execute the control operation corresponding to the current state parameter according to the current state parameter of the vehicle in response to the power-down result being that the motor is successfully powered down and the current state of the high-voltage interlock circuit is a preset state, and to obtain the execution result, wherein the execution result is used to indicate whether the vehicle has completed the control operation; and a relay control unit, used to control the battery relay to disconnect in response to the execution result being that the vehicle has completed the control operation, and to obtain the disconnection result.

[0081] The parameter control unit includes: a state determination subunit, used to determine the vehicle's current gear, engine hood status, and vehicle speed based on current state parameters; a first control subunit, used to control the vehicle to enter limp mode in response to the current gear being a first preset gear, and / or the engine hood being closed, and / or the vehicle speed being greater than a preset speed; and a second control subunit, used to control the vehicle to power down the engine, preset air conditioning, drive motor, and DC-DC converter in response to the current gear being a second preset gear, and / or the engine hood being open, and / or the vehicle speed being less than a preset speed.

[0082] The relay control unit includes: a third control subunit, used to control the pre-charge relay in the battery relay to disconnect in response to the execution result indicating that the vehicle has completed the control operation, to obtain a first disconnection result, wherein the first disconnection result indicates whether the pre-charge relay has successfully disconnected; a fourth control subunit, used to control the main positive relay in the battery relay to disconnect in response to the first disconnection result indicating that the pre-charge relay has successfully disconnected, to obtain a second disconnection result, wherein the second disconnection result indicates whether the main positive relay has successfully disconnected; a fifth control subunit, used to control the main negative relay in the battery relay to disconnect in response to the second disconnection result indicating that the main positive relay has successfully disconnected, to obtain a third disconnection result, wherein the third disconnection result indicates whether the main negative relay has successfully disconnected; and a sixth control subunit, used to determine that the battery relay has successfully disconnected in response to the third disconnection result indicating that the main negative relay has successfully disconnected.

[0083] The fourth control module 808 includes: a monitoring unit, used to control the motor to perform a discharge operation based on a preset speed in response to the successful disconnection of the battery relay, and to monitor the capacitor voltage of the motor in real time; and a result determination unit, used to determine the discharge result as the motor discharge being completed in response to the capacitor voltage being less than a preset voltage.

[0084] The aforementioned device further includes: an instruction generation module, used to generate a vehicle discharge instruction in response to receiving a status update instruction that changes the key status of the vehicle from a power-on state to a power-off state.

[0085] Example 3

[0086] According to another aspect of the present invention, a computer-readable storage medium is also provided, characterized in that the computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the execution of the vehicle discharge control method described above in the processor of the device.

[0087] Example 4

[0088] According to another aspect of the present invention, a vehicle is also provided, characterized in that it includes: one or more processors; a storage device for storing one or more programs; and a vehicle discharge control method that, when the one or more programs are executed by the one or more processors, causes the one or more processors to perform any of the above-described methods.

[0089] Example 5

[0090] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program executes the above-described vehicle discharge control method during runtime. The sequence numbers of the above embodiments of the present invention are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0091] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0096] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method of vehicle discharge, characterized by, The method comprises: in response to receiving a discharge instruction of a vehicle, controlling a motor controller of a motor in the vehicle to enter a preset enabled state; based on the preset enabled state, controlling the motor to perform a power-down operation to obtain a power-down result, wherein the power-down result is used to indicate whether the motor is powered down successfully; in response to the power-down result being that the motor is powered down successfully, based on a current state of a high-voltage interlock loop in the vehicle, controlling a battery relay of a power battery in the vehicle to be disconnected to obtain a disconnection result, wherein the disconnection result is used to indicate whether the battery relay is disconnected successfully; in response to the battery relay being disconnected successfully, controlling the vehicle to perform a discharge operation to obtain a discharge result, wherein the discharge result is used to indicate whether the vehicle is discharged completely; wherein in response to the battery relay being disconnected successfully, controlling the vehicle to perform a discharge operation to obtain a discharge result comprises: in response to the battery relay being disconnected successfully, controlling the motor to perform a discharge operation based on a preset speed to obtain a motor discharge result, wherein the motor discharge result is used to indicate whether the motor is discharged completely; and in response to the motor discharge result being that the motor is discharged completely, controlling a preset controller of the vehicle to enter a hibernation state at a preset time point.

2. The control method of vehicle discharge according to claim 1, characterized by, in response to the power-down result being that the motor is powered down successfully, based on a current state of a high-voltage interlock loop in the vehicle, controlling a battery relay of a power battery in the vehicle to be disconnected to obtain a disconnection result, comprises: in response to the power-down result being that the motor is powered down successfully and the current state of the high-voltage interlock loop being a preset state, controlling the vehicle to perform a control operation corresponding to a current state parameter of the vehicle according to the current state parameter to obtain an execution result, wherein the execution result is used to indicate whether the vehicle completes the control operation; in response to the execution result being that the vehicle completes the control operation, controlling the battery relay to be disconnected to obtain the disconnection result.

3. The control method of vehicle discharge according to claim 2, characterized by, controlling the vehicle to perform a control operation corresponding to a current state parameter of the vehicle according to the current state parameter to obtain an execution result, comprises: determining a current gear of the vehicle and an engine front hood state and a vehicle speed according to the current state parameter; in response to the current gear being a first preset gear, and / or the engine front hood state being a closed state, and / or the vehicle speed being greater than a preset vehicle speed, controlling the vehicle to perform a control operation of entering a limp-home mode of the vehicle; in response to the current gear being a second preset gear, and / or the engine front hood state being an open state, and / or the vehicle speed being less than the preset vehicle speed, controlling the vehicle to perform a control operation of powering down an engine, a preset air conditioner, a drive motor and a direct current converter.

4. The control method of vehicle discharge according to claim 2, characterized by, in response to the execution result being that the vehicle completes the control operation, controlling the battery relay to be disconnected to obtain the disconnection result, comprises: In response to the execution result being that the vehicle completes the control operation, a pre-charge relay in the battery relay is controlled to be disconnected, to obtain a first disconnection result, where the first disconnection result is used to indicate whether the pre-charge relay is successfully disconnected; In response to the first disconnection result being that the pre-charge relay is successfully disconnected, a main positive relay in the battery relay is controlled to be disconnected, to obtain a second disconnection result, where the second disconnection result is used to indicate whether the main positive relay is successfully disconnected; In response to the second disconnection result being that the main positive relay is successfully disconnected, a main negative relay in the battery relay is controlled to be disconnected, to obtain a third disconnection result, where the third disconnection result is used to indicate whether the main negative relay is successfully disconnected; In response to the third disconnection result being that the main negative relay is successfully disconnected, it is determined that the battery relay is successfully disconnected.

5. The control method of vehicle discharge according to claim 1, characterized by, In response to the battery relay being successfully disconnected, the motor is controlled to perform a discharging operation based on a preset speed, to obtain a discharging result, where the discharging result is used to indicate whether the motor is successfully discharged, including: In response to the battery relay being successfully disconnected, the motor is controlled to perform a discharging operation based on the preset speed, and a capacitor voltage of the motor is monitored in real time; In response to the capacitor voltage being less than a preset voltage, it is determined that the discharging result is that the motor is successfully discharged.

6. The control method of vehicle discharge according to claim 1, characterized by, The method further includes: In response to receiving a state update instruction that a key state of the vehicle is updated from a power-on state to a power-off state, the discharging instruction of the vehicle is generated.

7. A control device for discharging a vehicle, characterized by comprising: Including: A first control module is configured to, in response to receiving a discharging instruction of a vehicle, control a motor controller of a motor in the vehicle to enter a preset enabled state; A second control module is configured to, based on the preset enabled state, control the motor to perform a power-off operation, to obtain a power-off result, where the power-off result is used to indicate whether the motor is successfully powered off; A third control module is configured to, in response to the power-off result being that the motor is successfully powered off, based on a current state of a high-voltage interlock loop in the vehicle, control a battery relay of a power battery in the vehicle to be disconnected, to obtain a disconnection result, where the disconnection result is used to indicate whether the battery relay is successfully disconnected; A fourth control module is configured to, in response to the battery relay being successfully disconnected, control the vehicle to perform a discharging operation, to obtain a discharging result, where the discharging result is used to indicate whether the vehicle is successfully discharged; The fourth control module is further configured to, in response to the battery relay being successfully disconnected, control the motor to perform a discharging operation based on a preset speed, to obtain a motor discharging result, where the motor discharging result is used to indicate whether the motor is successfully discharged; and in response to the motor discharging result being that the motor is successfully discharged, control a preset controller of the vehicle to enter a hibernation state at a preset time point.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium includes a stored program, where the program, when executed, controls a processor of a device to perform the control method of the vehicle discharging of any one of claims 1 to 6.

9. A vehicle characterized by comprising: Including: One or more processors; A storage device configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors perform the control method of the vehicle discharge according to any one of claims 1 to 6.

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