Vehicle, control pilot circuit and charging control method

Abstract

The present invention discloses a vehicle, a control guidance circuit and a charging control method, wherein the vehicle comprises: a vehicle-end charging connection resistor, a vehicle-end charging stop switch, a vehicle-end charging stop resistor and a vehicle-end first connection confirmation terminal, wherein the vehicle-end charging connection resistor, the vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected between the vehicle-end first connection confirmation terminal and the vehicle body ground, and the vehicle-end charging stop switch is connected in parallel with the vehicle-end charging stop resistor, and the parallel vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected in series with the vehicle-end charging connection resistor, and the vehicle further comprises a vehicle controller and a first detection point, wherein the vehicle controller detects the voltage of the vehicle-end first connection confirmation terminal through the first detection point; the vehicle controller is also used to control the vehicle to stop charging according to the voltage of the first detection point when the vehicle-end charging stop switch is in the disconnected state. The method can realize that the vehicle-end actively initiates an emergency stop, avoiding the risk that the vehicle-end cannot cut off the high-voltage charging circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to a vehicle, a control guidance circuit and a charging control method. Background Art

[0002] At present, the conductive charging methods adopted by vehicles generally include AC charging pile charging and DC charging pile charging. In addition, there is also a vehicle-to-vehicle conductive charging and discharging method. Under normal circumstances, the charging stop can be initiated by the charging pile or by the vehicle, but the initiation of the charging stop is through CAN message interaction. When a charging abnormality occurs and charging needs to be stopped urgently, the emergency stop switch can be pressed at the pile end, and the high-voltage relay can be disconnected by the pile end. This solution requires the high-voltage relay at the pile end to lead out two additional pins to receive the signal of the emergency stop switch, and the vehicle end cannot actively initiate an emergency stop. In extreme cases, there may be a risk that the emergency stop at the pile end fails and the vehicle end cannot cut off the high-voltage charging circuit. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one object of the present invention is to provide a vehicle, a control guidance circuit and a charging control method to enable the vehicle end to actively initiate an emergency stop and avoid the risk that the vehicle end cannot cut off the high-voltage charging circuit.

[0004] In a first aspect, the present invention proposes a vehicle, comprising: a vehicle-end charging connection resistor, a vehicle-end charging stop switch, a vehicle-end charging stop resistor and a vehicle-end first connection confirmation terminal, wherein the vehicle-end charging connection resistor, the vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected between the vehicle-end first connection confirmation terminal and the vehicle body ground, and the vehicle-end charging stop switch is connected in parallel with the vehicle-end charging stop resistor, and the parallel-connected vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected in series with the vehicle-end charging connection resistor; the vehicle also comprises a vehicle controller and a first detection point, and the vehicle controller detects the voltage of the vehicle-end first connection confirmation terminal through the first detection point; the vehicle controller is also used to control the vehicle to stop charging according to the voltage of the first detection point when the vehicle-end charging stop switch is in an off state.

[0005] In a second aspect, the present invention proposes a control guidance circuit, which includes: the control guidance circuit includes: a first control guidance module and a second control guidance module, the first control guidance module is arranged on the vehicle, and the second control guidance module is arranged on the power supply equipment, wherein the first control guidance module includes a vehicle-end charging connection resistor, a vehicle-end charging stop switch, a vehicle-end charging stop resistor and a vehicle-end first connection confirmation terminal, the vehicle-end charging connection resistor, the vehicle-end charging stop switch, and the vehicle-end charging stop resistor are connected between the vehicle-end first connection confirmation terminal and the vehicle body ground, and the vehicle-end charging stop switch is connected in parallel with the vehicle-end charging stop resistor, and the parallel vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected in series with the vehicle-end charging connection resistor, and the first control guidance module also includes a vehicle controller and a first detection point, and the vehicle controller detects the voltage of the vehicle-end first connection confirmation terminal through the first detection point. ; The vehicle controller is also used to control the vehicle to stop charging according to the voltage of the first detection point when the vehicle-end stop charging switch is in the disconnected state; the second control guidance module includes a power supply end charging connection resistor, a power supply end stop charging switch, a power supply end stop charging resistor and a first connection confirmation terminal of the power supply end, the power supply end stop charging switch is connected in parallel with the power supply end stop charging resistor, the parallel power supply end stop charging switch and the power supply end stop charging resistor are connected in series with the power supply end charging connection resistor, and are connected in series between the first connection confirmation terminal of the power supply end and the preset power supply of the power supply end, the second control guidance module also includes a power supply device controller and a third detection point, the power supply device controller detects the voltage of the first connection confirmation terminal of the power supply end through the third detection point; the power supply device controller is also used to control the power supply device to stop supplying power according to the voltage of the third detection point when the power supply end stop charging switch is in the disconnected state.

[0006] In a third aspect, the present invention proposes a charging control method, which is applied to the vehicle in the above embodiment, and the method includes: obtaining the voltage of a first detection point; when the vehicle-end stop charging switch is in an off state, controlling the vehicle to stop charging according to the voltage of the first detection point.

[0007] In a fourth aspect, the present invention proposes another charging control method, which is applied to the control guidance circuit of the above-mentioned embodiment, and the method includes: the vehicle controller obtains the voltage of the first detection point, and when at least one of the vehicle-end stop charging switch and the power supply-end stop charging switch is in the disconnected state, controls the vehicle to stop charging according to the voltage of the first detection point; and / or, the power supply equipment controller obtains the voltage of the third detection point, and when at least one of the vehicle-end stop charging switch and the power supply-end stop charging switch is in the disconnected state, controls the power supply equipment to stop supplying power according to the voltage of the third detection point.

[0008] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of a vehicle according to an embodiment of the present invention;

[0010] Figure 2 is a schematic structural diagram of a vehicle according to another embodiment of the present invention;

[0011] Figure 3 is a schematic structural diagram of a control and guidance circuit according to an embodiment of the present invention;

[0012] Figure 4 is a schematic structural diagram of a control and guidance circuit according to another embodiment of the present invention;

[0013] Figure 5 is a structural schematic diagram of a control and guidance circuit according to another embodiment of the present invention;

[0014] Figure 6 is a flow chart of a charging control method according to an embodiment of the present invention;

[0015] Figure 7 is a flow chart of a charging control method according to a specific embodiment of the present invention;

[0016] Figure 8 is a flow chart of a charging control method according to another embodiment of the present invention. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] The following describes a power supply vehicle, a control pilot circuit, and a charging control method according to an embodiment of the present invention with reference to the accompanying drawings.

[0019] Figure 1 1 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.

[0020] like Figure 1As shown, the vehicle 100 includes: a vehicle-end charging connection resistor R4, a vehicle-end charging stop switch S2, a vehicle-end charging stop resistor R7 and a vehicle-end first connection confirmation terminal CC1. The vehicle-end charging connection resistor R4, the vehicle-end charging stop switch S2 and the vehicle-end charging stop resistor R7 are connected between the vehicle-end first connection confirmation terminal CC1 and the body ground of the vehicle, and the vehicle-end charging stop switch S2 is connected in parallel with the vehicle-end charging stop resistor R7. The parallel-connected vehicle-end charging stop switch S2 and the vehicle-end charging stop resistor R7 are connected in series with the vehicle-end charging connection resistor R4. Figure 1 The relative positions of the vehicle-side charging connection resistor R4 and the vehicle-side charging stop switch S2 and vehicle-side charging stop resistor R7 after parallel connection are exemplary, and the two can be interchanged. For the convenience of description, the vehicle-side charging stop switch S2 and vehicle-side charging stop resistor R7 after parallel connection are referred to as the vehicle-side charging stop unit. Figure 1 In the example shown, one end of the vehicle-end charging connection resistor R4 can be connected to the vehicle body ground, the other end of the vehicle-end charging connection resistor R4 is connected to one end of the vehicle-end stop charging unit, and the other end of the vehicle-end stop charging unit is connected to the vehicle-end first connection confirmation terminal CC1.

[0021] In this embodiment, see Figure 1 The vehicle 100 further includes a vehicle controller 110 and a first detection point 3, which can be arranged between the vehicle-end first connection confirmation terminal CC1 and the vehicle-end charging connection resistor R4 and the vehicle-end charging stop unit connected in series, and the vehicle controller 110 detects the voltage of the vehicle-end first connection confirmation terminal CC1 through the first detection point 3. The vehicle controller 110 is also used to control the vehicle 100 to stop charging according to the voltage of the first detection point 3 when the vehicle-end charging stop switch S2 is in the disconnected state.

[0022] exist Figure 1 In the example shown, the vehicle 100 may also include a power battery 120, charging circuit control switches K5 and K6, wherein the charging circuit control switch K5 is connected between a first end of the power battery 120 and a DC voltage positive terminal DC+ of the vehicle 100, and the charging circuit control switch K6 is connected between a second end of the power battery 120 and a DC voltage negative terminal DC- of the vehicle 100. When the vehicle controller 110 controls the vehicle 100 to stop charging according to the voltage at the first detection point 3, the charging circuit control switches K5 and K6 may be controlled to be in an open state (during the charging process, the vehicle controller 110 controls the charging circuit control switches K5 and K6 to be in a closed state to power the vehicle 100).

[0023] Specifically, the vehicle-side stop charging switch S2 can be a normally closed switch. After the vehicle 100 enters the charging process, if the vehicle initiates an emergency stop, the vehicle-side stop charging switch S2 changes from closed to open, and the vehicle-side stop charging resistor R7 changes from a short-circuit state to a series connection with the vehicle-side charging connection resistor R4, and the voltage at the first detection point changes. Therefore, by setting the vehicle-side stop charging switch S2 and the vehicle-side stop charging resistor R7, the vehicle 100 can actively initiate an emergency stop, and the voltage detection accuracy of the first detection point 3 is improved, which is convenient for accurately identifying the vehicle-side emergency stop information, thereby helping to avoid the risk of the vehicle-side being unable to cut off the high-voltage charging circuit.

[0024] In one embodiment of the present invention, Figure 2 As shown, the vehicle 100 also includes: a vehicle-end detection resistor R5, a vehicle-end detection switch S3 and a vehicle-end second connection confirmation terminal CC2. The vehicle-end detection resistor R5 is connected in series with the vehicle-end detection switch S3. The series-connected vehicle-end detection resistor R5 and the vehicle-end detection switch S3 are connected between the vehicle-end second connection confirmation terminal CC2 and the vehicle-end preset power supply U2. Figure 2 The positions of the vehicle-end detection resistor R5 and the vehicle-end detection switch S3 are exemplary. One end of the vehicle-end detection switch S3 can also be connected to the vehicle-end preset power supply U2, and the other end of the vehicle-end detection switch S3 can be connected to one end of the vehicle-end detection resistor R5, and the other end of the vehicle-end detection resistor R5 can be connected to the vehicle-end second connection confirmation terminal CC2.

[0025] In this embodiment, the vehicle 100 also includes a second detection point 2, which is arranged between the vehicle-end detection resistor R5 and the vehicle-end detection switch S3 connected in series and the vehicle-end second connection confirmation terminal CC2. The vehicle controller 110 detects the voltage of the vehicle-end second connection confirmation terminal CC2 through the second detection point 2. The vehicle controller 110 is also used to detect the charging connection status of the vehicle 100 based on the voltage of the first detection point 3 and the voltage of the second detection point 2.

[0026] Specifically, the charging connection state of the vehicle 100 includes a charging unconnected state, a charging semi-connected state, and a charging fully connected state, and the vehicle-end detection switch S3 may be a normally closed switch.

[0027] When the vehicle 100 is in a charging unconnected state, the line where the first connection confirmation terminal CC1 of the vehicle end and the line where the second connection confirmation terminal CC2 of the vehicle end are located are both disconnected, and the vehicle end detection switch S3 is in a closed state. The voltage of the second detection point 2 is the supply voltage of the vehicle end preset power supply U2, such as 5V, and the voltage of the first detection point 3 is 0V. The vehicle controller 110 can identify that the vehicle 100 is in a charging unconnected state through the voltages of the first detection point 3 and the second detection point 2.

[0028] When the vehicle 100 is in a semi-connected state of charging, the line where the first connection confirmation terminal CC1 on the vehicle side is located is disconnected (which may be caused by the disconnection of the charge and discharge connection switch S on the power supply end of the power supply device such as the charging pile) and the line where the second connection confirmation terminal CC2 on the vehicle side is located is connected, and the voltage at the second detection point 2 is a voltage such as 2.5V which is less than the power supply voltage of the preset power supply U2 on the vehicle side, and the voltage at the first detection point 3 is 0V. The vehicle controller 110 can determine that the vehicle interface of the vehicle 100 is connected by the voltages at the first detection point 3 and the second detection point 2. At this time, a prompt message can be issued to remind the driver that the vehicle interface is connected to prevent the risk of dragging the gun when the driver shifts into gear while driving. It should be noted that the second detection point 2 must be set on the left side of the vehicle-end detection switch S3. The reason is: when the second detection point 2 is set on the right side of the vehicle-end detection switch S3, if the vehicle interface is connected but the line where the vehicle-end first connection confirmation terminal CC1 is located is disconnected, the vehicle-end detection switch S3 fails (changes from normally closed to normally open), and the vehicle controller 110 detects that the voltage of the second detection point 2 is the power supply voltage of the vehicle-end preset power supply U2, such as 5V, and thus mistakenly judges that the vehicle interface is not connected. At this time, there is a risk of dragging the gun by allowing the vehicle to be engaged.

[0029] When the vehicle 100 is in a fully connected state for charging, the line where the first connection confirmation terminal CC1 on the vehicle side is located and the line where the second connection confirmation terminal CC2 on the vehicle side is located are both connected, the voltage at the second detection point 2 is a voltage such as 2.5V that is less than the power supply voltage of the preset power supply U2 on the vehicle side, and the voltage at the first detection point 3 is a normal charging connection voltage (recorded as the first voltage) such as 4V, and the power supply device 200 can close the electronic lock to ensure that the vehicle interface is reliably locked, and both the vehicle 100 and the power supply device can enter the charging process. It should be noted that after entering the charging process, the vehicle controller 100 can control the vehicle-side detection switch S3 from closed to open, and the voltage at the second detection point 2 becomes 0V.

[0030] As a result, the vehicle end can accurately determine the charging connection status of the vehicle according to the voltages of the first detection point 3 and the second detection point 2, thereby avoiding the occurrence of towing guns.

[0031] As an example, the resistance value of the vehicle-end charging connection resistor R4 is 1KΩ, and the resistance value of the vehicle-end stop charging resistor R7 is 9KΩ.

[0032] In this example, the present invention retains the vehicle-side charging connection resistor R4 with a resistance of 1KΩ in the existing vehicle, without changing the original configuration of the vehicle, and can be compatible with existing standards and parameters to improve compatibility. Among them, setting the resistance value to 9KΩ can make the voltage of the first detection point 3 just an integer when the vehicle-side stops suddenly, which is conducive to improving the accuracy of detection.

[0033] The vehicle 100 of the embodiment of the present invention can realize active emergency stop at the vehicle end, which helps to avoid the risk of failure to cut off the high-voltage charging circuit at the vehicle end; and can accurately identify the charging connection status of the vehicle to avoid dragging the gun.

[0034] Figure 3 It is a schematic diagram of the structure of a control steering circuit according to an embodiment of the present invention.

[0035] like Figure 3 As shown, the control guidance circuit 300 includes: a first control guidance module 310 and a second control guidance module 320, the first control guidance module 310 is arranged on the vehicle 100, and the second control guidance module 320 is arranged on the power supply device 200 (such as a charging pile).

[0036] Among them, see Figure 3 The first control guidance module 310 includes a vehicle-end charging connection resistor R4, a vehicle-end stop charging switch S2, a vehicle-end stop charging resistor R7 and a vehicle-end first connection confirmation terminal CC1. The vehicle-end charging connection resistor R4, the vehicle-end stop charging switch S2 and the vehicle-end stop charging resistor R7 are connected between the vehicle-end first connection confirmation terminal CC1 and the vehicle body ground of the vehicle 100, and the vehicle-end stop charging switch S2 is connected in parallel with the vehicle-end stop charging resistor R7. The parallel vehicle-end stop charging switch S2 and the vehicle-end stop charging resistor R7 are connected in series with the vehicle-end charging connection resistor R4. The first control guidance module 310 also includes a vehicle controller 110 and a first detection point 3. The vehicle controller 110 detects the voltage of the vehicle-end first connection confirmation terminal CC1 through the first detection point 3. The vehicle controller 110 is also used to control the vehicle 100 to stop charging according to the voltage of the first detection point 3 when the vehicle-end stop charging switch S2 is in the disconnected state.

[0037] The second control guidance module 320 includes a charging connection resistor R1 at the power supply end, a stop charging switch S1 at the power supply end, a stop charging resistor R6 at the power supply end, a preset power supply U1 at the power supply end, and a first connection confirmation terminal CC1' at the power supply end. The stop charging switch S1 at the power supply end is connected in parallel with the stop charging resistor R6 at the power supply end. The parallel stop charging switch S1 at the power supply end and the stop charging resistor R6 at the power supply end are connected in series with the charging connection resistor R1 at the power supply end, and are connected in series between the first connection confirmation terminal CC1' at the power supply end and the preset power supply U1 at the power supply end. The second control guidance module 320 also includes a power supply device controller 210 and a third detection point 1. The power supply device controller 210 detects the voltage of the first connection confirmation terminal CC1' at the power supply end through the third detection point 1. The power supply device controller 210 is also used to control the power supply device 200 to stop supplying power according to the voltage of the third detection point 1 when the stop charging switch S1 at the power supply end is in the disconnected state.

[0038] It should be noted that in Figure 3In the example shown, the vehicle 100 may further include a power battery 120, charging circuit control switches K5 and K6, wherein the charging circuit control switch K5 is connected between a first end of the power battery 120 and a DC voltage positive terminal DC+ of the vehicle 100, and the charging circuit control switch K6 is connected between a second end of the power battery 120 and a DC voltage negative terminal DC- of the vehicle 100. When the vehicle controller 110 controls the vehicle 100 to stop charging according to the voltage at the first detection point 3, the charging circuit control switches K5 and K6 may be controlled to be in an open state (during the charging process, the vehicle controller 110 controls the charging circuit control switches K5 and K6 to be in a closed state to supply power to the vehicle 100).

[0039] The power supply device 200 may also include a power supply device power module 220 and power supply loop control switches K1 and K2, wherein the power supply loop control switch K1 is connected between the first end of the power supply device power module 220 and the DC voltage positive terminal DC+' of the power supply device 200, and the power supply loop control switch K2 is connected between the second end of the power supply device power module 220 and the DC voltage negative terminal DC-' of the power supply device 200. When charging is required, the first control guidance module 210 and the second control guidance module 220 establish a connection, the body ground of the vehicle 100 is connected to the device ground of the power supply device 200, the first connection confirmation terminal CC1 of the vehicle end is connected to the first connection confirmation terminal CC1' of the power supply end, and the power supply device controller 210 obtains the voltage of the third detection point 1 after receiving the start charging signal, and when it is determined that the power supply device 200 is successfully connected to the vehicle 100 according to the voltage (such as 4V), the power supply device controller 210 controls the power supply circuit control switches K1 and K2 to be in a closed state, and at the same time, the vehicle controller 210 obtains the voltage of the first detection point 3, and when it is determined that the power supply device 200 is successfully connected to the vehicle 100 according to the voltage (such as 4V), the vehicle controller 110 controls the charging circuit control switches K5 and K6 to be in a closed state, and then enters the charging process, and the power supply device power module 220 starts to supply power to the power battery 120. The power supply device controller 210 controls the power supply device 200 to stop supplying power according to the voltage of the third detection point 1, and can control the power supply circuit control switches K1 and K2 to be in an open state.

[0040] In this embodiment, see Figure 3, the vehicle-side stop charging switch S2 and the power supply-side stop charging switch S1 can both be normally closed switches. After the vehicle 100 enters the charging process, if the vehicle initiates an emergency stop, the vehicle-side stop charging switch S2 changes from closed to open, the vehicle-side stop charging resistor R7 changes from a short-circuit state to a series connection with the vehicle-side charging connection resistor R4, and the voltage of the first detection point 3 changes. After the power supply device 200 enters the charging process, if the power supply device 200 initiates an emergency stop, the power supply-side stop charging switch S1 changes from closed to open, the power supply-side stop charging resistor R6 changes from a short-circuit state to a series connection with the power supply-side charging connection resistor R1, and the voltage of the third detection point 1 changes. Therefore, by setting the vehicle-side stop charging switch S2 and the vehicle-side stop charging resistor R7, the vehicle 100 can actively initiate an emergency stop, and the voltage detection accuracy of the first detection point 3 is improved, which is convenient for accurately identifying the vehicle-side emergency stop information, thereby helping to avoid the risk of the vehicle-side being unable to cut off the high-voltage charging circuit. At the same time, by setting the stop charging switch S1 and the stop charging resistor R6 at the power supply end, the power supply device 200 can actively initiate an emergency stop, which helps to avoid the risk that the power supply end cannot cut off the high-voltage charging circuit.

[0041] As a feasible implementation, the ratio of the sum of the resistance of the power supply end charging connection resistor R1 and the resistance of the power supply end stop charging resistor R6 to the sum of the resistance of the vehicle end charging connection resistor R4 and the resistance of the vehicle end stop charging resistor R7 is 1:2. For example, the resistance of the power supply end charging connection resistor R1 is 2KΩ, the resistance of the power supply end stop charging resistor R6 is 3KΩ, the resistance of the vehicle end charging connection resistor R4 is 1KΩ, and the resistance of the vehicle end stop charging resistor R7 is 9KΩ.

[0042] Specifically, the power supply end stop charging switch S1 and the vehicle end stop charging switch S2 can both be normally closed switches. Take the power supply voltage of the preset power supply U1 of the power supply end as 12V and the above-mentioned resistance value as an example. As shown in Table 1 below, after the vehicle 100 enters the charging process, the voltage of the first detection point 3 and the voltage of the third detection point 1 are both the first voltage 4V. If the power supply device 200 initiates an emergency stop, the power supply end stop charging switch S1 changes from closed to open, and the voltage of the third detection point 1 and the voltage of the first detection point 3 change from the first voltage 4V to the second voltage 2V, and the voltage of detection point 3 is 2V. If the vehicle 100 initiates an emergency stop, the vehicle end stop charging switch S2 changes from closed to open, and the voltage of the third detection point 1 and the voltage of the first detection point 3 both change to the third voltage 10V. If the vehicle 100 and the power supply device 200 initiate an emergency stop at the same time, the switch S1 and the switch S2 are disconnected at the same time, and the voltage of the third detection point 1 and the voltage of the first detection point 3 both become 8V.

[0043] Table 1

[0044]

[0045] Therefore, the vehicle controller 110 can determine the emergency stop initiator according to the voltage of the first detection point 3, and the power supply equipment 210 can determine the emergency stop initiator according to the voltage of the third detection point 1.

[0046] In one embodiment of the present invention, Figure 4 As shown, the first control guidance module 310 also includes a vehicle-end detection resistor R5, a vehicle-end detection switch S3 and a vehicle-end second connection confirmation terminal CC2. The vehicle-end detection resistor R5 is connected in series with the vehicle-end detection switch S3. The series-connected vehicle-end detection resistor R5 and the power supply end stop charging switch S3 are connected between the vehicle-end second connection confirmation terminal CC2 and the vehicle-end preset power supply U2. The second control guidance module 320 also includes a power supply end detection resistor R3 and a power supply end second connection confirmation terminal CC2'. The power supply end detection resistor R3 is connected between the power supply end second connection confirmation terminal CC2' and the device ground of the power supply device 200.

[0047] In this embodiment, see Figure 4 The first control guidance module 310 also includes a second detection point 2, and the vehicle controller 110 detects the voltage of the second connection confirmation terminal CC2 of the vehicle end through the second detection point 2. The vehicle controller 110 is also used to detect the charging connection state of the vehicle 100 according to the voltage of the first detection point 3 and the voltage of the second detection point 2.

[0048] As an example, Figure 5 As shown, the second control guidance module 320 may also include: a power supply end interface, a first power supply end connection confirmation terminal CC1' is arranged on the power supply end interface, and a power supply end charge and discharge connection switch S is also arranged on the power supply end interface, and the power supply end charge and discharge connection switch S is connected in series with the first power supply end connection confirmation terminal CC1'.

[0049] In this example, see Figure 5 As shown in Table 1 above, when the vehicle 100 is in a charging unconnected state, the line where the first connection confirmation terminal CC1 of the vehicle end is located and the line where the second connection confirmation terminal CC2 of the vehicle end is located are both disconnected, and the vehicle end detection switch S3 is in a closed state. The voltage of the second detection point 2 is the supply voltage of the vehicle end preset power supply U2, such as 5V, and the voltage of the first detection point 3 is 0V. The vehicle controller 110 can identify that the vehicle 100 is in a charging unconnected state through the voltages of the first detection point 3 and the second detection point 2.

[0050] When the vehicle 100 is in a semi-connected state of charging, the line where the first connection confirmation terminal CC1 on the vehicle side is located is disconnected (which may be caused by the disconnection of the charge and discharge connection switch S on the power supply side) and the line where the second connection confirmation terminal CC2 on the vehicle side is located is connected. The voltage at the second detection point 2 is a voltage such as 2.5V that is less than the power supply voltage of the preset power supply U2 on the vehicle side, and the voltage at the first detection point 3 is 0V. The vehicle controller 110 can determine that the vehicle interface of the vehicle 100 is connected by the voltages at the first detection point 3 and the second detection point 2. At this time, a prompt message can be issued to remind the driver that the vehicle interface is connected to prevent the risk of dragging the gun when the driver shifts into gear while driving. It should be noted that the second detection point 2 must be set on the left side of the vehicle-end detection switch S3. The reason is: when the second detection point 2 is set on the right side of the vehicle-end detection switch S3, if the vehicle interface is connected but the line where the vehicle-end first connection confirmation terminal CC1 is located is disconnected, the vehicle-end detection switch S3 fails (changes from normally closed to normally open), and the vehicle controller 110 detects that the voltage of the second detection point 2 is the power supply voltage of the vehicle-end preset power supply U2, such as 5V, and thus mistakenly judges that the vehicle interface is not connected. At this time, there is a risk of dragging the gun by allowing the vehicle to be engaged.

[0051] When the vehicle 100 is in a fully connected state for charging, the line where the first connection confirmation terminal CC1 on the vehicle side is located and the line where the second connection confirmation terminal CC2 on the vehicle side is located are both connected, the voltage at the second detection point 2 is a voltage such as 2.5V that is less than the power supply voltage of the preset power supply U2 on the vehicle side, and the voltage at the first detection point 3 is a normal charging connection voltage (recorded as the first voltage) such as 4V, and the power supply device 200 can close the electronic lock to ensure that the vehicle interface is reliably locked, and both the vehicle 100 and the power supply device can enter the charging process. It should be noted that after entering the charging process, the vehicle controller 100 can control the vehicle-side detection switch S3 from closed to open, and the voltage at the second detection point 2 becomes 0V.

[0052] It should be noted that in Figure 5 In the example shown, the power supply device 200 may include a power supply device body and a charging plug connected to the power supply device body, and the charging plug is the above-mentioned power supply end interface, which may be in the form of a charging gun. Correspondingly, the vehicle 200 may include a vehicle body and a charging socket connected to the vehicle body, and the power supply device 200 is connected to the vehicle 100 through the connection between the charging plug and the charging socket. The power supply end charge and discharge connection switch S and the power supply end detection resistor R3 can be set in the power supply end interface of the power supply device 200, and the resistor R1, the resistor R6, and the switch S1 can be set in the power supply device body.

[0053] Optionally, the charging plug is detachably connected to the power supply device body.

[0054] In one embodiment of the present invention, before charging, it is also possible to detect whether the switches S1, S2, S3, S are invalid according to the voltage at the first detection point 3, the voltage at the second detection point 2, and the voltage at the third detection point 1.

[0055] Specifically, see Figure 5 As shown in Table 1 above, the resistance of resistor R1 is 2KΩ, the resistance of resistor R6 is 3KΩ, the resistance of resistor R3 is 1KΩ, the resistance of resistor R7 is 9KΩ, the resistance of resistor R4 is 1KΩ, the resistance of resistor R5 is 1KΩ, the voltage provided by power supply U1 is 12V, the voltage provided by power supply U2 is 5V, and switches S1, S2, S3, and S are all normally closed switches.

[0056] When the switch S1 fails, the voltage at the third detection point 1 and the first detection point 3 is 2V after the vehicle interface is fully connected. The vehicle controller 110 and the power supply equipment controller 210 can determine that the power supply equipment 200 has an emergency stop failure. At this time, the vehicle controller 110 and the power supply equipment controller 210 can issue a prompt message to prompt the user to check the emergency stop module of the power supply equipment 200.

[0057] When switch S2 fails, the voltage at the third detection point 1 and the first detection point 3 is 10V after the vehicle interface is fully connected. The vehicle controller 110 and the power supply equipment controller 210 can determine that the vehicle 100 has an emergency stop failure. At this time, the vehicle controller 110 and the power supply equipment controller 210 can issue a prompt message to prompt the user to check the emergency stop module of the vehicle 100.

[0058] When switch S3 fails, the voltage at detection point 2 is 0V, and the vehicle controller 110 cannot detect the gun connection. After the vehicle interface is fully connected, the voltage at the third detection point 1 is 4V. The power supply device controller 210 determines that the vehicle interface is fully connected and initiates a charging request, but the vehicle 100 does not respond to charging. At this time, the vehicle controller 110 and the power supply device controller 210 can issue a prompt message so that the user can troubleshoot the problem through the prompts at the vehicle end and the charging end.

[0059] When the switch S fails, after the vehicle interface is fully connected, the voltage at the third detection point 1 is 12V, the voltage at the first detection point 3 is 0V, and the voltage at the second detection point 2 is 2.5V. The power supply device 200 cannot enter the charging process. At this time, the vehicle controller 110 and the power supply device controller 210 can issue a prompt message to facilitate the user to troubleshoot the problem.

[0060] The prompt information may be a prompt sound, a prompt character, a prompt text, etc., and may include the voltages of the third detection point 1, the second detection point 2, and the first detection point 3 accordingly.

[0061] It should be noted that the resistance values ​​of the above resistors are merely exemplary and not limiting, and resistors of other resistance values ​​may be set as required.

[0062] In summary, the control guidance circuit of the embodiment of the present invention can realize the vehicle-side actively initiating emergency stop, which helps to avoid the risk of the vehicle-side being unable to cut off the high-voltage charging circuit; and can accurately identify the charging connection status of the vehicle to avoid dragging the gun; it can also detect whether each switch fails before charging, and issue corresponding prompts so that the user can perform targeted troubleshooting to ensure smooth charging.

[0063] Figure 6 is a flow chart of a charging control method according to an embodiment of the present invention.

[0064] In an embodiment of the present invention, the charging control method is applied to the above-mentioned vehicle 100 and can be executed by the vehicle controller 110. Figure 6 As shown, the charging control method includes:

[0065] S61, obtaining the voltage of the first detection point.

[0066] S62, when the vehicle-end stop charging switch is in the off state, controlling the vehicle to stop charging according to the voltage at the first detection point.

[0067] In an embodiment of the present invention, Figure 7 As shown, the charging control method may further include:

[0068] S63, obtaining the voltage of the second detection point;

[0069] S64, detecting a charging connection state of the vehicle according to the voltage at the first detection point and the voltage at the second detection point.

[0070] It should be noted that other specific implementations of the charging control method of the embodiment of the present invention may refer to the vehicle 100 of the above-mentioned embodiment of the present invention.

[0071] The charging control method of the embodiment of the present invention can realize the vehicle end actively initiating an emergency stop, which helps to avoid the risk of the vehicle end being unable to cut off the high-voltage charging circuit; and can accurately identify the charging connection status of the vehicle to avoid dragging the gun.

[0072] Figure 8 is a flow chart of a charging control method according to another embodiment of the present invention.

[0073] In an embodiment of the present invention, the charging control method is applied to the control steering circuit 300 described above and can be executed by the vehicle controller 110 and the power supply device controller 210. Figure 8 As shown, the charging control method includes:

[0074] S81, the vehicle controller obtains the voltage of the first detection point, and controls the vehicle to stop charging according to the voltage of the first detection point when at least one of the vehicle-end stop charging switch and the power supply end stop charging switch is in the off state. And / or, the power supply device controller obtains the voltage of the third detection point, and controls the power supply device to stop supplying power according to the voltage of the third detection point when at least one of the vehicle-end stop charging switch and the power supply end stop charging switch is in the off state.

[0075] Among them, see Figure 3-5 When the first connection confirmation terminal CC1 at the vehicle end is connected to the first connection confirmation terminal CC1' at the power supply end, the voltages at the first detection point 3 and the third detection point 1 are the same.

[0076] As a possible implementation, during the charging process, when the voltage at the first detection point 3 changes from the first voltage 4V to the second voltage 2V, the vehicle controller determines that the stop charging switch S1 at the power supply end is in the disconnected state; and / or, when the voltage at the third detection point 1 changes from the first voltage to the second voltage, the power supply equipment controller determines that the stop charging switch S1 at the power supply end is in the disconnected state.

[0077] As another possible implementation, during the charging process, when the voltage at the first detection point 3 changes from the first voltage 4V to the third voltage 10V, the vehicle controller determines that the vehicle-end stop charging switch S2 is in the disconnected state, wherein the third voltage is different from the second voltage value; and / or when the voltage at the third detection point 1 changes from the first voltage to the third voltage, the power supply equipment controller determines that the vehicle-end stop charging switch S2 is in the disconnected state.

[0078] As another possible implementation, during the charging process, when the voltage at the first detection point 3 changes from the first voltage 4V to the fourth voltage 8V, the vehicle controller determines that the power supply end stop charging switch S1 and the switch S2 are both in the disconnected state; when the voltage at the third detection point 1 changes from the first voltage to the fourth voltage, the power supply equipment controller determines that the power supply end stop charging switch S1 and the vehicle end stop charging switch S2 are both in the disconnected state, wherein the fourth voltage is different from the third voltage and the second voltage value.

[0079] In some embodiments of the present invention, the charging control method may further include: when the voltage of the first detection point 3 is 0 and the voltage of the second detection point 2 is the voltage of the vehicle-side preset power supply of 5V, the vehicle controller determines that the vehicle is in a charging unconnected state; when the voltage of the first detection point 3 is 0 and the voltage of the second detection point 2 is the fifth voltage of 2.5V, the vehicle controller determines that the vehicle is in a charging semi-connected state, wherein the fifth voltage is less than the voltage of the vehicle-side preset power supply; when the voltage of the first detection point 3 is the first voltage of 4V and the voltage of the second detection point 2 is the fifth voltage of 2.5V, the vehicle controller determines that the vehicle is in a charging fully connected state.

[0080] In some embodiments of the present invention, before charging starts, the charging control method may also include: when the voltage at the first detection point 3 is the second voltage 2V and the voltage at the second detection point 2 is the fifth voltage 2.5V, the vehicle controller determines that the stop charging switch at the power supply end has failed; when the voltage at the first detection point 3 is the third voltage 10V and the voltage at the second detection point 2 is the fifth voltage 2.5V, the vehicle controller determines that the stop charging switch at the vehicle end has failed; when the voltage at the first detection point 3 is the first voltage 4V and the voltage at the second detection point 2 is 0, the vehicle controller determines that the vehicle-end detection switch has failed.

[0081] It should be noted that other specific implementations of the charging control method of the embodiment of the present invention may refer to the control steering circuit 300 of the above embodiment of the present invention.

[0082] The charging control method of the embodiment of the present invention can realize the vehicle-side actively initiating an emergency stop, which helps to avoid the risk of the vehicle-side being unable to cut off the high-voltage charging circuit; and can accurately identify the charging connection status of the vehicle to avoid dragging the gun; it can also detect whether each switch is invalid before charging, and issue corresponding prompts so that the user can perform targeted troubleshooting to ensure smooth charging.

[0083] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0087] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0090] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A vehicle, characterized in that: The vehicle comprises: a vehicle-end charging connection resistor, a vehicle-end charging stop switch, a vehicle-end charging stop resistor and a vehicle-end first connection confirmation terminal, wherein the vehicle-end charging connection resistor, the vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected between the vehicle-end first connection confirmation terminal and the vehicle body ground, and the vehicle-end charging stop switch is connected in parallel with the vehicle-end charging stop resistor, and the parallel-connected vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected in series with the vehicle-end charging connection resistor; The vehicle further comprises a vehicle controller and a first detection point, wherein the vehicle controller detects the voltage of the first connection confirmation terminal at the vehicle end through the first detection point; The vehicle controller is also used to control the vehicle to stop charging according to the voltage of the first detection point when the vehicle-end stop charging switch is in the off state; The vehicle further includes: a vehicle-end detection resistor, a vehicle-end detection switch and a vehicle-end second connection confirmation terminal, wherein the vehicle-end detection resistor is connected in series with the vehicle-end detection switch, and the series-connected vehicle-end detection resistor and the vehicle-end detection switch are connected between the vehicle-end second connection confirmation terminal and a vehicle-end preset power supply, The vehicle further comprises a second detection point, and the vehicle controller detects the voltage of the second connection confirmation terminal at the vehicle end through the second detection point; Wherein, the vehicle controller is further used to detect the charging connection state of the vehicle according to the voltage of the first detection point and the voltage of the second detection point; The vehicle-end charging stop switch and the vehicle-end detection switch are both normally closed switches, wherein the vehicle controller is also used to control the vehicle-end detection switch to disconnect when it is detected that the vehicle is in a fully charged connected state; the second detection point is set on the left side of the vehicle-end detection switch.

2. The vehicle according to claim 1, characterized in that The resistance value of the vehicle-end charging connection resistor is 1KΩ, and the resistance value of the vehicle-end stop charging resistor is 9KΩ.

3. A control steering circuit, characterized in that: The control guidance circuit includes: a first control guidance module and a second control guidance module, wherein the first control guidance module is arranged on the vehicle, and the second control guidance module is arranged on the power supply device, wherein: The first control guidance module includes a vehicle-end charging connection resistor, a vehicle-end charging stop switch, a vehicle-end charging stop resistor and a vehicle-end first connection confirmation terminal, wherein the vehicle-end charging connection resistor, the vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected between the vehicle-end first connection confirmation terminal and the vehicle body ground, and the vehicle-end charging stop switch is connected in parallel with the vehicle-end charging stop resistor, and the parallel-connected vehicle-end charging stop switch and the vehicle-end charging stop resistor are connected in series with the vehicle-end charging connection resistor. The first control guidance module further includes a vehicle controller and a first detection point, wherein the vehicle controller detects the voltage of the first connection confirmation terminal at the vehicle end through the first detection point; the vehicle controller is also used to control the vehicle to stop charging according to the voltage of the first detection point when the vehicle end stop charging switch is in the disconnected state; The second control and guidance module includes a charging connection resistor at the power supply end, a stop charging switch at the power supply end, a stop charging resistor at the power supply end, and a first connection confirmation terminal at the power supply end. The stop charging switch at the power supply end is connected in parallel with the stop charging resistor at the power supply end. The stop charging switch and the stop charging resistor at the power supply end after being connected in parallel are connected in series with the charging connection resistor at the power supply end, and are connected in series between the first connection confirmation terminal at the power supply end and a preset power supply at the power supply end. The second control and guidance module also includes a power supply device controller and a third detection point. The power supply device controller detects the voltage of the first connection confirmation terminal at the power supply end through the third detection point. The power supply device controller is also used to control the power supply device to stop supplying power according to the voltage of the third detection point when the stop charging switch at the power supply end is in the disconnected state; The first control guidance module further includes a vehicle-end detection resistor, a vehicle-end detection switch and a vehicle-end second connection confirmation terminal, wherein the vehicle-end detection resistor is connected in series with the vehicle-end detection switch, and the vehicle-end detection resistor and the power supply end stop charging switch connected in series are connected between the vehicle-end second connection confirmation terminal and the vehicle-end preset power supply. The first control guidance module further includes a second detection point, and the vehicle controller detects the voltage of the second connection confirmation terminal of the vehicle end through the second detection point; Wherein, the vehicle controller is further used to detect the charging connection state of the vehicle according to the voltage of the first detection point and the voltage of the second detection point; The vehicle-end charging stop switch, the vehicle-end detection switch, and the power supply-end charging stop switch are all normally closed switches. Wherein, the vehicle controller is also used to control the vehicle-end detection switch to disconnect when it is detected that the vehicle is in a fully charged connected state; the second detection point is set on the left side of the vehicle-end detection switch.

4. The control steering circuit according to claim 3, characterized in that: The second control and guidance module further includes a power supply end detection resistor and a second power supply end connection confirmation terminal, wherein the power supply end detection resistor is connected between the second power supply end connection confirmation terminal and a device ground of the power supply device.

5. The control steering circuit according to claim 4, characterized in that: The second control guidance module also includes A power supply end interface, wherein the first connection confirmation terminal of the power supply end is arranged on the power supply end interface, The power supply end interface is also provided with a power supply end charge and discharge connection switch, and the power supply end charge and discharge connection switch is connected in series with the first connection confirmation terminal of the power supply end.

6. The control steering circuit according to claim 3, characterized in that: The ratio of the sum of the resistance of the charging connection resistor at the power supply end and the resistance of the stop charging resistor at the power supply end to the sum of the resistance of the charging connection resistor at the vehicle end and the resistance of the stop charging resistor at the vehicle end is 1:

2.

7. The control steering circuit according to claim 6, characterized in that: The resistance value of the charging connection resistor at the power supply end is 2KΩ, the resistance value of the stop charging resistor at the power supply end is 3KΩ, the resistance value of the charging connection resistor at the vehicle end is 1KΩ, and the resistance value of the stop charging resistor at the vehicle end is 9KΩ.

8. A charging control method, characterized in that: Applied to a vehicle according to any one of claims 1-2, the method comprises: Obtaining the voltage of the first detection point; When the vehicle-end charging stop switch is in an off state, the vehicle is controlled to stop charging according to the voltage at the first detection point.

9. The charging control method according to claim 8, characterized in that: The method further comprises: Acquire the voltage of the second detection point; The charging connection state of the vehicle is detected according to the voltage of the first detection point and the voltage of the second detection point.

10. A charging control method, characterized in that: Applied to the control steering circuit according to any one of claims 3 to 7, the method comprises: The vehicle controller obtains the voltage of the first detection point, and controls the vehicle to stop charging according to the voltage of the first detection point when at least one of the vehicle-end stop charging switch and the power supply-end stop charging switch is in an off state; and / or, The power supply device controller obtains the voltage of the third detection point, and controls the power supply device to stop supplying power according to the voltage of the third detection point when at least one of the vehicle-end stop charging switch and the power supply-end stop charging switch is in an off state.

11. The charging control method according to claim 10, characterized in that: During the charging process, When the voltage at the first detection point changes from the first voltage to the second voltage, the vehicle controller determines that the charging stop switch at the power supply end is in the disconnected state; And / or, when the voltage at the third detection point changes from the first voltage to the second voltage, the power supply device controller determines that the charging stop switch at the power supply end is in the disconnected state.

12. The charging control method according to claim 11, characterized in that: During the charging process, When the voltage at the first detection point changes from the first voltage to a third voltage, the vehicle controller determines that the vehicle-end charging stop switch is in an off state, wherein the third voltage is different from the second voltage value; And / or, when the voltage at the third detection point changes from the first voltage to the third voltage, the power supply equipment controller determines that the vehicle-end charging stop switch is in the disconnected state.

13. The charging control method according to claim 12, characterized in that: During the charging process, When the voltage at the first detection point changes from the first voltage to a fourth voltage, the vehicle controller determines that both the power supply end stop charging switch and the vehicle end stop charging switch are in an off state; When the voltage at the third detection point changes from the first voltage to the fourth voltage, the power supply equipment controller determines that the power supply end stop charging switch and the vehicle end stop charging switch are both in the disconnected state, wherein the fourth voltage is different from the third voltage and the second voltage value.

14. The charging control method according to claim 10, characterized in that: The method further comprises: When the voltage of the first detection point is 0 and the voltage of the second detection point is the voltage of the preset power supply at the vehicle end, the vehicle controller determines that the vehicle is in a charging unconnected state; When the voltage at the first detection point is 0 and the voltage at the second detection point is a fifth voltage, the vehicle controller determines that the vehicle is in a semi-connected charging state, wherein the fifth voltage is less than the voltage of the preset power supply at the vehicle end; When the voltage at the first detection point is the first voltage and the voltage at the second detection point is the fifth voltage, the vehicle controller determines that the vehicle is in a fully-charged connected state.

15. The charging control method according to claim 10, characterized in that: Before charging starts, the method further includes: When the voltage at the first detection point is the second voltage and the voltage at the second detection point is the fifth voltage, the vehicle controller determines that the charging stop switch at the power supply end is invalid; When the voltage at the first detection point is the third voltage and the voltage at the second detection point is the fifth voltage, the vehicle controller determines that the vehicle-end charging stop switch is invalid; When the voltage at the first detection point is a first voltage and the voltage at the second detection point is 0, the vehicle controller determines that the vehicle-end detection switch has failed.

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