A vehicle control method, a vehicle, and a computer readable storage medium

Abstract

The present disclosure provides a vehicle control method, a vehicle and a computer readable storage medium, the method comprising: acquiring a switch state of a charging port cover of the vehicle and a leakage state of the vehicle; and performing anti-electric shock protection of the charging port of the vehicle according to the switch state and the leakage state.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically, to a vehicle control method, a vehicle, and a computer-readable storage medium. Background Technology

[0002] With the rapid development of new energy vehicles, electric vehicles are incorporating more and more new technologies, and electric vehicle safety has always been a prerequisite for the development of new technologies.

[0003] The charging ports of existing electric vehicles still draw current even when not charging, which can easily lead to electric shock accidents and cause injury to pedestrians and drivers. Summary of the Invention

[0004] One objective of this disclosure is to provide a new technical solution for protecting vehicle charging ports from electric shock.

[0005] According to a first aspect of the present disclosure, a vehicle control method is provided, comprising:

[0006] Obtain the open / closed status of the vehicle's charging port cover and the vehicle's leakage status.

[0007] The vehicle is protected against electric shock at its charging port based on the switch status and the leakage status.

[0008] Optionally, the method further includes:

[0009] When the switch is in the ON state and no charging gun is connected to the charging port, the charging port cover is closed.

[0010] Optionally, the method further includes:

[0011] When the switch is in the ON state and the charging port is not connected to a charging gun, or when the control of closing the charging port cover fails, the vehicle is controlled to output a prompt message to remind the user to check the charging port cover.

[0012] Optionally, the method further includes:

[0013] When the switch is in the ON state, the vehicle's driving speed is obtained, and the vehicle's charging port is protected against electric shock based on the driving speed.

[0014] Optionally, the method further includes providing electric shock protection to the charging port of the vehicle based on the driving speed, including:

[0015] When the driving speed is less than a first speed threshold and the leakage condition is leakage, the vehicle is controlled to disconnect the high-voltage connection.

[0016] Optionally, the method further includes providing electric shock protection to the charging port of the vehicle based on the driving speed, including:

[0017] When the driving speed is less than the first speed threshold and the leakage state is no leakage, the positive terminal of the vehicle's charging port and the positive terminal of the first battery pack are prohibited from conducting.

[0018] Optionally, the method further includes providing electric shock protection to the charging port of the vehicle based on the driving speed, including:

[0019] If the vehicle speed is greater than or equal to a first speed threshold and the leakage condition is leakage, the vehicle speed is controlled to be less than or equal to a second speed threshold.

[0020] Wherein, the second speed threshold is greater than the first speed threshold.

[0021] Optionally, the step of providing electric shock protection to the vehicle's charging port based on the switch state and the leakage state includes:

[0022] When the switch is in the off state and the leakage state is leakage, the vehicle's driving speed is controlled to be less than or equal to the second speed threshold.

[0023] Optionally, detecting the leakage current status of the vehicle includes:

[0024] The first resistance value to ground of the positive busbar of the vehicle and the second resistance value to ground of the negative busbar of the vehicle are detected.

[0025] The leakage state is determined based on the first resistance value to ground and the second resistance value to ground.

[0026] Optionally, determining the leakage current state based on the first resistance to ground value and the second resistance to ground value includes:

[0027] If at least one of the first resistance value to ground and the second resistance value to ground is greater than a resistance threshold, the leakage state is determined to be leakage.

[0028] If both the first resistance value to ground and the second resistance value to ground are less than or equal to the resistance threshold, the leakage state is determined to be no leakage.

[0029] According to a second aspect of this disclosure, a vehicle is provided, including a processor and a memory, the memory being used to store a computer program, and the processor being used, under the control of the computer program, to execute the method as described in the first aspect of this disclosure.

[0030] According to a third aspect of this disclosure, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the method described in the first aspect of this disclosure.

[0031] Through the embodiments of this disclosure, the charging port is protected against electric shock based on the open / closed state of the charging port cover and the vehicle's leakage status. This can prevent electric shock from the charging port from causing harm to pedestrians and the driver, ensuring the personal safety of the driver and pedestrians, reducing the probability of vehicle breakdown, and lowering the vehicle's hardware costs.

[0032] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0034] Figure 1 This is a block diagram of a charging system according to an embodiment of the present disclosure;

[0035] Figure 2 This is a flowchart of a vehicle control method according to an embodiment of the present disclosure;

[0036] Figure 3 This is a block diagram of a charging system according to an embodiment of the present disclosure;

[0037] Figure 4 This is a flowchart of a vehicle control method according to an embodiment of the present disclosure;

[0038] Figure 5 This is a block diagram of a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0039] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0040] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0041] Techniques, methods, and apparatus known to those skilled in the art in the relevant field may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0042] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0044] <Charging System>

[0045] In some charging systems, the positive terminal of the first battery pack is directly connected to the positive terminal of the charging port, or, when the battery pack is self-heating, the positive terminal of the first battery pack is connected to the positive terminal of the charging port. This will cause the charging port to become energized, resulting in a risk of electric shock if the charging port cover is open.

[0046] This embodiment provides a charging system, such as Figure 1 As shown, the charging system 1000 includes a battery pack 1100, a boost circuit 1200, a DC charging port 1300, a first contactor K1, a second contactor K2, a third contactor K3, and a fourth contactor K4; the battery pack 1100 includes a first battery group 1110 and a second battery group 1120 connected in series between the positive bus and the negative bus.

[0047] The positive terminal of the first battery pack 1110 is connected to the negative terminal of the second battery pack 1120. The positive terminal of the second battery pack 1120 and the first output terminal of the boost circuit 1200 are both connected to the positive bus. The negative terminal of the first battery pack 1110 and the second output terminal of the boost circuit 1200 are both connected to the negative bus. The first input terminal of the boost circuit 1200 is connected to the positive terminal of the DC charging port 1300, and the second input terminal of the boost circuit 1200 is connected to the negative terminal of the DC charging port 1300. The first contactor K1 is connected between the second output terminal of the boost circuit 1200 and the negative terminal of the DC charging port 1300. The second contactor K2 is connected between the negative terminal of the first battery pack 1110 and the second output terminal of the boost circuit 1200. The third contactor K3 is connected between the positive terminal of the second battery pack 1120 and the first output terminal of the boost circuit 1200. The fourth contactor K4 is connected between the positive terminal of the first battery pack 1110 and the positive terminal of the DC charging port 1300.

[0048] Furthermore, such as Figure 1As shown, the boost circuit 1200 includes switching transistors VT1 to VT6, capacitor C1, and inductors L1 to L3. Capacitor C1 is connected between the first and second output terminals of the boost circuit 1200. Switches VT1 and VT2 are connected in series between the first and second output terminals of the boost circuit 1200. Switches VT3 and VT4 are connected in series between the first and second output terminals of the boost circuit 1200. Switches VT5 and VT6 are connected in series between the first and second output terminals of the boost circuit 1200. The second output terminal and the second input terminal of the boost circuit 1200 are connected. Inductor L1 is connected between the first potential point and the positive terminal of the DC charging port 1300. Inductor L2 is connected between the second potential point and the positive terminal of the DC charging port 1300. Inductor L3 is connected between the third potential point and the positive terminal of the DC charging port 1300. The first potential point is the potential point between switches VT1 and VT2, the second potential point is the potential point between switches VT3 and VT4, and the third potential point is the potential point between switches VT5 and VT6.

[0049] In one example, C1 is the bus capacitor of the motor controller. Switches VT1, VT2, VT3, VT4, VT5, and VT6 are the three-phase bridge arm power devices of the motor controller, which can be IGBTs or SiC devices. The center point of the motor coil is connected to the positive terminal of the fourth contactor K4 and the DC charging port 1300.

[0050] Specifically, with the second contactor K2, the third contactor K3, and the fourth contactor K4 turned on, the following steps 1 and 2 can be executed:

[0051] Step 1: First, with switches VT1, VT3, and VT5 turned on and switches VT2, VT4, and VT6 turned off, the first battery pack 1110 discharges to provide current. The current flows through the third contactor K3 and switches VT1, VT3, and VT5 to charge inductors L1, L2, and L3, allowing inductors L1, L2, and L3 to store energy. The stored energy current in inductors L1, L2, and L3 then flows back to the negative terminal of the first battery pack 1110 through the fourth contactor K4. Next, with switches VT1, VT3, and VT5 turned off and switches VT2, VT4, and VT6 turned on, the current direction of inductors L1, L2, and L3 remains unchanged, flowing through K4, the second battery pack 1120, the second contactor K2, and switches VT2, VT4, and VT6 to charge the second battery pack 1120.

[0052] Step 2: First, with switches VT2, VT4, and VT6 turned on and switches VT1, VT3, and VT5 turned off, the second battery pack 1120 discharges to provide current. The current passes through the fourth contactor K4 to charge inductors L1, L2, and L3, allowing them to store energy. The stored energy current in inductors L1, L2, and L3 then flows back to the negative terminal of the second battery pack 1120 through switches VT2, VT4, and VT6 and the second contactor K2. Next, with switches VT1, VT3, and VT5 turned on and switches VT2, VT4, and VT6 turned off, the current direction of inductors L1, L2, and L3 remains unchanged, flowing through switches VT1, VT3, and VT5, the third contactor K3, the first battery pack 1110, and the fourth contactor K4 to charge the first battery pack 1110.

[0053] In this embodiment, steps 1 and 2 are controlled cyclically at a certain frequency, which can achieve self-heating of the battery pack.

[0054] If the fourth contactor K4 is turned on, the positive terminal of the first battery pack 1110 and the positive terminal of the DC charging port 1300 will be connected. If a person comes into contact with the positive terminal of the DC charging port, there will be a risk of electric shock.

[0055] <Method>

[0056] This disclosure provides a vehicle control method that can be implemented by a vehicle.

[0057] Figure 2 This is a flowchart of a vehicle control method according to an embodiment of the present disclosure.

[0058] like Figure 2 As shown, the method includes the following steps S2100 to S2200:

[0059] Step S2100: Obtain the open / closed status of the vehicle's charging port cover and the vehicle's leakage status.

[0060] In one embodiment, the vehicle may be equipped with a contactor that matches the open / closed state of the charging port cover. When the charging port cover is closed, the contactor is in a conducting state; when the charging port cover is open, the contactor is in a disengaged state. Therefore, the open / closed state of the charging port cover can be detected by checking the state of the contactor.

[0061] In one embodiment of this disclosure, detecting the leakage current status of a vehicle includes: detecting the first resistance value to ground of the vehicle's positive bus and the second resistance value to ground of the negative bus; and determining the leakage current status based on the first resistance value to ground and the second resistance value to ground.

[0062] The first pair of ground resistance values ​​is the resistance value of R+ between the positive busbar and the vehicle body ground, and the second pair of ground resistance values ​​is the resistance value of R- between the negative busbar and the vehicle body ground.

[0063] In one embodiment, such as Figure 3 As shown, resistors R1 to R4 are connected in series between the positive and negative busbars of the vehicle. Resistors R1 and R2 are connected in series between the positive busbar and the vehicle body ground. Resistors R3 and R4 are connected in series between the vehicle body ground and the negative busbar. A switch S1 is connected between the potential point between resistors R1 and R2 and the negative busbar. By detecting the first voltage across resistor R4 when switch S1 is closed, the second voltage across resistor R4 when switch S1 is open, and the resistance values ​​of resistors R1 to R4, the first and second resistance values ​​to ground can be obtained.

[0064] In another embodiment, the first resistance to ground value and the second resistance to ground value can also be determined based on the output voltage and output current of the battery pack.

[0065] In this embodiment, determining the leakage state based on the first resistance value to ground and the second resistance value to ground can include: determining the leakage state as leakage when at least one of the first resistance value to ground and the second resistance value to ground is greater than a resistance threshold; and determining the leakage state as no leakage when both the first resistance value to ground and the second resistance value to ground are less than or equal to the resistance threshold. The resistance threshold can be predetermined according to a leakage standard.

[0066] In one embodiment of this disclosure, the method may further include: controlling the charging port cover to close when the charging port cover of the vehicle is in an open state and the charging port is not connected to a charging gun.

[0067] Furthermore, even when the charging port cover is closed, the open / closed state of the charging port cover can be retrieved again.

[0068] In this embodiment, the vehicle can control the charging port cover to close by sending a closing command to it. After sending the closing command, the vehicle can re-detect the open / closed state of the charging port cover.

[0069] If the charging port cover is found to be closed upon re-acquisition, it can be determined that the charging port cover was closed successfully. If the charging port cover is found to be open upon re-acquisition, it can be determined that the charging port cover failed to close.

[0070] In this embodiment, when the charging port cover is open and the charging port is not connected to a charging gun, controlling the charging port cover to close can protect the charging port from electric shock and ensure the personal safety of the driver and pedestrians.

[0071] Step S2200: Protect the vehicle's charging port from electric shock based on the switch status and leakage status.

[0072] Through the embodiments of this disclosure, the charging port is protected against electric shock based on the open / closed state of the charging port cover and the vehicle's leakage status. This can prevent electric shock from the charging port from causing harm to pedestrians and the driver, ensuring the personal safety of the driver and pedestrians, reducing the probability of vehicle breakdown, and lowering the vehicle's hardware costs.

[0073] In one embodiment of this disclosure, the method further includes: when the switch is in the open state and the charging port is not connected to a charging gun, or when the control of the charging port cover to close fails, controlling the vehicle to output a prompt message to remind the user to check the charging port cover.

[0074] In this embodiment, the vehicle outputs a prompt message to remind the user to check the charging port cover. This may include displaying the prompt message on the vehicle's dashboard or central control screen, or playing the prompt message through a speaker.

[0075] In this embodiment, when the charging port cover is in the open state and the charging port is not connected to the charging gun, or when the charging port cover fails to close, the vehicle outputs a prompt message to remind the user to check the charging port cover. This can remind the driver to close the charging port cover in time to prevent the charging port from leaking electricity and causing harm to pedestrians and the driver, thus ensuring the personal safety of the driver and pedestrians.

[0076] In one embodiment of this disclosure, when the charging port cover is in the open state, the vehicle is protected against electric shock at the charging port based on the switch state and the leakage state. This may include: obtaining the vehicle's driving speed and protecting the vehicle against electric shock at the charging port based on the driving speed, the switch state, and the leakage state.

[0077] Furthermore, the charging port cover being in an "open" state can be either the state obtained in step S2100 or the state obtained again when the charging port cover is closed, indicating that the charging port cover failed to close.

[0078] In this embodiment, the vehicle's speed can be obtained from sensor data collected by at least one of the speed sensor, inertial sensor, and acceleration sensor installed in the vehicle.

[0079] In one embodiment of this disclosure, electric shock protection of the vehicle charging port is performed based on driving speed, switch status, and leakage status, including: when the driving speed is less than a first speed threshold and the leakage status is leakage, controlling the vehicle to disconnect the high-voltage connection.

[0080] The first speed threshold can be preset according to the application scenario or specific needs. When the vehicle's speed is lower than the first speed threshold, the likelihood of a pedestrian touching the charging port is higher, while when the vehicle's speed is greater than or equal to the first speed threshold, the likelihood of a pedestrian touching the charging port is lower. For example, the first speed threshold could be 5 km / h.

[0081] Specifically, when the charging port cover is open and the vehicle speed is below a first speed threshold, the likelihood of a pedestrian touching the charging port is relatively high; when the vehicle is in a leakage state, the risk of electric shock from the charging port is very high. Therefore, when the charging port cover is open, the vehicle speed is below the first speed threshold, and the vehicle is in a leakage state, to prevent electric shock from the charging port to pedestrians and the driver, the vehicle can be controlled to disconnect the high-voltage connection, causing the vehicle's high-voltage power supply system to stop outputting high-voltage electricity.

[0082] In this embodiment, when the charging port cover is open, the driving speed is less than the first speed threshold, and the leakage condition is leakage, controlling the vehicle to disconnect the high-voltage connection can prevent the charging port leakage from causing harm to pedestrians and the driver, thus ensuring the personal safety of the driver and pedestrians.

[0083] In one embodiment of this disclosure, electric shock protection for the vehicle's charging port is provided based on driving speed, switch status, and leakage status, including: when the driving speed is less than a first speed threshold and the leakage status is no leakage, the positive terminal of the vehicle's charging port and the positive terminal of the first battery pack are prohibited from conducting.

[0084] In some possible embodiments, when the vehicle's battery pack self-heats, it is necessary to make the positive terminal of the vehicle's charging port and the positive terminal of the first battery pack conductive. Therefore, the self-heating of the vehicle's battery pack can be prevented by making the positive terminal of the charging port and the positive terminal of the first battery pack conductive.

[0085] In such Figure 1 In the charging system shown, by controlling the contactor K4 to conduct, the first output terminal of the boost circuit 1200 is connected to the positive terminal of the first battery pack. By controlling the periodic conduction of each switch VT1 to VT6 in the boost circuit 1200, the boost circuit 1200 is periodically stored and discharged, so that an alternating current is generated in the circuit where the battery pack is located, to heat the battery pack.

[0086] Specifically, when the charging port cover is open and the vehicle speed is below a first speed threshold, the likelihood of a pedestrian touching the charging port is relatively high; when the vehicle is not experiencing any leakage, the risk of electric shock from the charging port is low. Therefore, when the charging port cover is open, the vehicle speed is below the first speed threshold, and there is no leakage, it is possible to prevent conduction between the positive terminal of the charging port and the positive terminal of the first battery pack, i.e., to prohibit... Figure 1 Contactor K4 in the middle is turned on, thereby preventing the battery pack from self-heating.

[0087] Furthermore, since the positive terminal of the first battery pack 1110 can be connected to the positive terminal of the DC charging port 1300 when the contactor K4 is turned on, the DC charging port 1300 will be energized, thereby increasing the risk of electric shock to the charging port. Therefore, this embodiment can prevent the risk of electric shock to the charging port from increasing by prohibiting the connection between the positive terminal of the charging port and the positive terminal of the first battery pack.

[0088] In one embodiment of this disclosure, the vehicle is protected against electric shock at the charging port based on driving speed, switch status, and leakage status, including: when the driving speed is greater than or equal to a first speed threshold and the leakage status is no leakage, controlling the vehicle to output a prompt message to remind the user to check the charging port cover.

[0089] Specifically, if the charging port cover is open and the vehicle speed is greater than or equal to a first speed threshold, the likelihood of a pedestrian touching the charging port is low; if the vehicle is not leaking electricity, the risk of electric shock from the charging port is low. Therefore, if the charging port cover is open, the vehicle speed is greater than or equal to the first speed threshold, and there is no leakage, the vehicle can output a prompt message to remind the user to check the charging port cover.

[0090] In this embodiment, the vehicle outputs a prompt message to remind the user to check the charging port cover. This may include displaying the prompt message on the vehicle's dashboard or central control screen, or playing the prompt message through a speaker.

[0091] In this embodiment, when the charging port cover is in the open state, the driving speed is greater than or equal to the first speed threshold, and the leakage state is no leakage, the vehicle is controlled to output a prompt message to remind the user to check the charging port cover. This can remind the driver to close the charging port cover in time to prevent the charging port leakage from causing harm to pedestrians and the driver, thus ensuring the personal safety of the driver and pedestrians.

[0092] In one embodiment of this disclosure, electric shock protection of the vehicle's charging port is implemented based on driving speed, switch status, and leakage status, including: when the driving speed is greater than or equal to a first speed threshold and the leakage status is leakage, controlling the vehicle's driving speed to be less than or equal to a second speed threshold, and / or controlling the vehicle to output a prompt message to remind the user to check the charging port cover. The second speed threshold is greater than the first speed threshold.

[0093] In this embodiment, the second speed threshold can be preset according to the application scenario or specific requirements. For example, the second speed threshold can be 60 km / h.

[0094] Specifically, when the charging port cover is open and the vehicle speed is greater than or equal to a first speed threshold, the likelihood of a pedestrian touching the charging port is low; when the vehicle is in a leakage state, the risk of electric shock from the charging port is high. Therefore, when the charging port cover is open, the vehicle speed is greater than or equal to the first speed threshold, and the vehicle is in a leakage state, to prevent electric shock from the charging port from harming pedestrians and the driver, the vehicle speed can be controlled to be less than or equal to a second speed threshold, and / or the vehicle can be controlled to output a prompt message to remind the user to check the charging port cover, thus reminding the driver to repair the vehicle in a timely manner.

[0095] In this embodiment, the vehicle outputs a prompt message to remind the user to check the charging port cover. This may include displaying the prompt message on the vehicle's dashboard or central control screen, or playing the prompt message through a speaker.

[0096] In this embodiment, when the charging port cover is open, the driving speed is greater than or equal to a first speed threshold, and the vehicle is in a leakage state, controlling the vehicle's driving speed to be less than or equal to a second speed threshold, and / or controlling the vehicle to output a prompt message to remind the user to check the charging port cover, can prompt the driver to repair the vehicle in a timely manner to reduce the risk of electric shock.

[0097] In one embodiment of this disclosure, when the charging port cover is successfully closed or the switch state of the charging port cover is closed, the vehicle is protected against electric shock at the charging port based on the switch state and the leakage state. This may include: when the switch state is closed and the leakage state is leakage, controlling the vehicle's driving speed to be less than or equal to a second speed threshold, and / or controlling the vehicle to output a prompt message to remind the user to check the charging port cover.

[0098] In this embodiment, the second speed threshold can be preset according to the application scenario or specific requirements. For example, the second speed threshold can be 60 km / h.

[0099] Specifically, if the charging port cover is successfully closed, or if the charging port cover is in the "closed" state, it indicates that the likelihood of a pedestrian touching the charging port is low; if the vehicle is in a "leakage" state, it indicates that the risk of electric shock from the charging port is high. Therefore, in order to prevent electric shock from the charging port from harming pedestrians and the driver, when the charging port cover is successfully closed and the "leakage" state is true, or when the charging port cover is in the "closed" state and the "leakage" state is true, to prevent electric shock from the charging port from harming pedestrians and the driver, the vehicle's speed can be controlled to be less than or equal to a second speed threshold, and / or the vehicle can be controlled to output a prompt message to remind the user to check the charging port cover, thus reminding the driver to repair the vehicle in a timely manner.

[0100] In this embodiment, the vehicle outputs a prompt message to remind the user to check the charging port cover. This may include displaying the prompt message on the vehicle's dashboard or central control screen, or playing the prompt message through a speaker.

[0101] In this embodiment, when the charging port cover is successfully closed and the leakage state is leakage, or when the charging port cover is closed and the leakage state is leakage, controlling the vehicle's driving speed to be less than or equal to the second speed threshold, and / or controlling the vehicle to output a prompt message to remind the user to check the charging port cover, can prompt the driver to repair the vehicle in a timely manner to reduce the risk of electric shock to the vehicle.

[0102] In one embodiment of this disclosure, when the charging port cover is in the open state and the charging port is connected to the charging gun, in order to ensure that the vehicle can be charged normally, no electric shock protection is provided for the charging port.

[0103] If the charging port cover is closed and there is no leakage, it means that the possibility of a pedestrian or driver touching the charging port is small and the risk of electric shock from the charging port is low. Therefore, it is not necessary to install electric shock protection for the charging port on the vehicle.

[0104] If the charging port cover is successfully closed and there is no leakage, it means that the possibility of pedestrians or drivers touching the charging port is small and the risk of electric shock from the charging port is low. Therefore, it is not necessary to install electric shock protection for the charging port on the vehicle.

[0105] Figure 4 This is a flowchart illustrating an example of a vehicle control method according to an embodiment of the present disclosure. Figure 4As shown, the method includes: detecting whether the charging port cover is open; if the charging port cover is closed, determining whether the vehicle is experiencing a leakage current; if there is no leakage current, controlling the vehicle to be in normal mode, i.e., not providing charging port electric shock protection; if there is a leakage current, controlling the vehicle to limp, i.e., controlling the vehicle's speed to be less than or equal to a second speed threshold, and also allowing the vehicle control contactor K4 to close so that the positive terminal of the charging port and the positive terminal of the first battery pack are connected, and also outputting a prompt message to remind the user to check the charging port cover.

[0106] If the charging port cover is detected to be open, check if a DC charging gun is connected to the charging port. If a DC charging gun is connected to the charging port, control the vehicle to enter normal mode, i.e., do not implement electric shock protection for the charging port. If no DC charging gun is connected to the charging port, control the charging port cover to close automatically.

[0107] The system detects whether the charging port cover has been successfully closed. If the charging port cover has been successfully closed, it detects whether the vehicle is experiencing a leakage current. If there is no leakage current, the system controls the vehicle to be in normal mode, i.e., the charging port is not protected against electric shock. If there is a leakage current, the system can control the vehicle to limp, i.e., control the vehicle's speed to be less than or equal to a second speed threshold. It can also allow the vehicle control contactor K4 to close, so that the positive terminal of the charging port and the positive terminal of the first battery pack are connected. It can also output a prompt message to remind the user to check the charging port cover.

[0108] If the charging port cover fails to close automatically, the system detects whether the vehicle's speed is greater than or equal to a first speed threshold of 5 km / h and whether the vehicle is in a leakage state. If the speed is greater than or equal to the first speed threshold of 5 km / h and the leakage state is present, the system can control the vehicle to limp, i.e., control the vehicle's speed to be less than or equal to a second speed threshold. It can also allow the vehicle control contactor K4 to close, thus establishing conductivity between the positive terminal of the charging port and the positive terminal of the first battery pack. Furthermore, it can output a prompt message to the user to check the charging port cover. If the speed is greater than or equal to the first speed threshold of 5 km / h and the leakage state is not present, the system outputs a prompt message to the user to check the charging port cover. If the speed is less than the first speed threshold of 5 km / h and the leakage state is present, the system controls the vehicle to de-energize, i.e., disconnects the high-voltage connection. When the driving speed is less than 5 km / h of the first speed threshold and the leakage status is not leakage, the vehicle control contactor K4 can be prevented from closing, that is, the positive terminal of the charging port and the positive terminal of the first battery pack are prevented from conducting, thereby disabling the self-heating function of the battery pack. It can also output a prompt message to remind the user to check the charging port cover.

[0109] <Vehicle Example>

[0110] Figure 5 A schematic diagram of the structure of a vehicle that can be used to implement the vehicle control method of the embodiments of this disclosure is shown.

[0111] Figure 5 The vehicle 5000 shown may include a processor 5100 and a memory 5200. The memory 5200 is used to store computer programs, and the processor 5100 is used to control the vehicle to perform the methods of any embodiment of this disclosure under the control of the computer programs.

[0112] The processor 5100, as the main component of the vehicle's Electronic Control Unit (ECU), is used to execute computer programs, which can be written using instruction sets based on architectures such as x37, Arm, RISC, MIPS, and SSE.

[0113] The memory 5200 includes, for example, ROM (Read-Only Memory), RAM (Random Access Memory), and non-volatile memory such as a hard disk, for storing the above computer programs, etc.

[0114] The vehicle in this embodiment can be a vehicle equipped with a power battery, specifically a pure electric vehicle or a hybrid vehicle.

[0115] In one example, the vehicle may also have at least one of other hardware structures such as an engine, a motor controller, a sensing device, an input device, an interface device, an output device, a motor, and a power battery, which are not limited here.

[0116] The rear end of the engine (the end connected to the flywheel) can be connected to the input end of the reducer via a clutch, and the output end of the reducer is connected to the tire axle, so that the engine can drive the tire to rotate.

[0117] The motor controller is used to control the motor's operation according to the control instructions sent by the processor 5100. For example, it controls the motor's output torque to drive the tire axle to rotate; or it controls the motor to feed electrical energy back to the power battery.

[0118] The sensing device may include various sensors, such as at least one of a speed sensor, attitude sensor, temperature sensor, humidity sensor, and pressure sensor.

[0119] Input devices may include button circuits, touch screens, microphones, knob circuits, throttle control devices with accelerator pedals, brake control devices with brake pedals, and so on.

[0120] Interface devices may include headphone jacks, diagnostic interfaces for on-board diagnostics (OBD) systems, charging interfaces, USB interfaces, etc.

[0121] Output devices may include displays, speakers, various indicator lights, etc.

[0122] When the motor is used as an electric motor, the power battery can be used to provide electrical energy to the motor.

[0123] <Example of a readable storage medium>

[0124] This embodiment provides a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the methods described in any of the method embodiments of this disclosure.

[0125] This invention can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of the invention.

[0126] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0127] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0128] The computer program instructions used to perform the operations of this invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing state information from the computer-readable program instructions. This electronic circuitry can execute the computer-readable program instructions to implement various aspects of the invention.

[0129] Various aspects of the present invention are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0130] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0131] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0132] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. It will be known to those skilled in the art that implementation in hardware, implementation in software, and implementation using a combination of software and hardware are equivalent.

[0133] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.

Claims

1. A vehicle control method, characterized in that, include: Obtain the open / closed status of the vehicle's charging port cover and the vehicle's leakage status. The vehicle is protected against electric shock at its charging port based on the switch status and the leakage status. The method further includes: When the switch is in the ON state, the vehicle's driving speed is obtained, and the vehicle's charging port is protected against electric shock based on the driving speed. The provision of electric shock protection for the charging port of the vehicle based on the driving speed includes: If the driving speed is less than a first speed threshold and the leakage state is leakage, control the vehicle to disconnect the high-voltage connection; When the driving speed is less than the first speed threshold and the leakage state is no leakage, the positive terminal of the vehicle's charging port and the positive terminal of the first battery pack are prohibited from conducting. When the driving speed is greater than or equal to a first speed threshold and the leakage state is leakage, the driving speed of the vehicle is controlled to be less than or equal to a second speed threshold, wherein the second speed threshold is greater than the first speed threshold; The method of providing electric shock protection for the vehicle's charging port based on the switch state and the leakage state includes: When the switch is in the off state and the leakage state is leakage, the vehicle's driving speed is controlled to be less than or equal to the second speed threshold.

2. The method according to claim 1, characterized in that, The method further includes: When the switch is in the ON state and no charging gun is connected to the charging port, the charging port cover is closed.

3. The method according to claim 2, characterized in that, The method further includes: When the switch is in the ON state and the charging port is not connected to a charging gun, or when the control of closing the charging port cover fails, the vehicle is controlled to output a prompt message to remind the user to check the charging port cover.

4. The method according to claim 1, characterized in that, Detecting the leakage current status of the vehicle includes: The first resistance value to ground of the positive busbar of the vehicle and the second resistance value to ground of the negative busbar of the vehicle are detected. The leakage state is determined based on the first resistance value to ground and the second resistance value to ground.

5. The method according to claim 4, characterized in that, Determining the leakage state based on the first resistance to ground value and the second resistance to ground value includes: If at least one of the first resistance value to ground and the second resistance value to ground is greater than a resistance threshold, the leakage state is determined to be leakage. If both the first resistance value to ground and the second resistance value to ground are less than or equal to the resistance threshold, the leakage state is determined to be no leakage.

6. A vehicle, characterized in that, It includes a processor and a memory, the memory being used to store a computer program, and the processor being used, under the control of the computer program, to execute the method as described in any one of claims 1 to 5.

7. A computer-readable storage medium having a computer program stored thereon, the computer program implementing the method as described in any one of claims 1 to 5 when executed by a processor.

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