CN115723593A

CN115723593A - Vehicle, control guidance circuit, and charge control method

Info

Publication number: CN115723593A
Application number: CN202110998153.XA
Authority: CN
Inventors: 廉玉波; 凌和平; 翟震; 李超; 史建勇
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-03-03

Abstract

The invention discloses a vehicle, a control guidance circuit and a charging control method, wherein the vehicle comprises: the vehicle comprises a vehicle end charging connection resistor, a vehicle end charging switch, a vehicle end charging resistor and a vehicle end first connection confirmation terminal, wherein the vehicle end charging connection resistor, the vehicle end charging switch and the vehicle end charging resistor are connected between the vehicle end first connection confirmation terminal and a vehicle body ground of the vehicle, the vehicle end charging switch is connected with the vehicle end charging resistor in parallel, the vehicle end charging switch and the vehicle end charging resistor after being connected in parallel are connected with the vehicle end charging connection resistor in series, 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 for controlling 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. The method can realize the initiative initiation of the sudden stop of the vehicle end, and avoid the risk that the vehicle end can not cut off the high-voltage charging loop.

Description

Vehicle, control guidance circuit, and charge control method

Technical Field

The invention relates to the technical field of vehicle charging, in particular to a vehicle, a control guidance circuit and a charging control method.

Background

At present, the conduction charging mode adopted by the vehicle generally comprises an alternating current charging pile charging mode, a direct current charging pile charging mode and a vehicle conduction charging and discharging mode through the vehicle. Under normal conditions, charging stopping CAN be initiated by the charging pile or a vehicle, but the initiation and the charging stopping are initiated through CAN message interaction. When charging is abnormal and emergency stop is needed, the emergency stop switch can be pressed down by the pile end, and the high-voltage relay is disconnected by the pile end. According to the scheme, two pins are additionally led out from the pile end high-voltage relay to receive signals of the emergency stop switch, the vehicle end cannot initiatively initiate emergency stop, and the risk that the pile end emergency stop fails and the vehicle end cannot cut off a high-voltage charging loop exists under extreme conditions.

Disclosure of Invention

The present invention is directed to solving, at least in part, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a vehicle, a control guidance circuit, and a charging control method, so as to implement an active sudden stop initiated by a vehicle end and avoid the risk that the vehicle end cannot cut off a high-voltage charging loop.

In a first aspect, the present invention provides a vehicle comprising: the vehicle-end charging connection resistor, the vehicle-end charging switch, the vehicle-end charging resistor and the vehicle-end first connection confirmation terminal are connected between the vehicle-end first connection confirmation terminal and a vehicle body ground of the vehicle, the vehicle-end charging switch is connected with the vehicle-end charging resistor in parallel, and the vehicle-end charging switch and the vehicle-end charging resistor which are connected in parallel are connected with the vehicle-end charging connection resistor in series; 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 for controlling 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.

In a second aspect, the present invention provides a control pilot circuit, comprising: the control steering circuit includes: the first control guidance module is arranged on a vehicle, and the second control guidance module is arranged on power supply equipment, wherein the first control guidance module comprises a vehicle end charging connection resistor, a vehicle end parking switch, a vehicle end parking resistor and a vehicle end first connection confirmation terminal, the vehicle end charging connection resistor, the vehicle end parking switch and the vehicle end parking resistor are connected between the vehicle end first connection confirmation terminal and a vehicle body ground of the vehicle, the vehicle end parking switch is connected with the vehicle end parking resistor in parallel, the vehicle end parking switch and the vehicle end parking resistor which are connected in parallel are connected in series with the vehicle end charging connection resistor, the first control guidance module further 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 for controlling 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; the second control guidance module comprises a power supply end charging connection resistor, a power supply end charging stop switch, a power supply end charging stop resistor and a power supply end first connection confirmation terminal, wherein the power supply end charging stop switch is connected with the power supply end charging stop resistor in parallel, the power supply end charging stop switch and the power supply end charging stop resistor which are connected in parallel are connected with the power supply end charging connection resistor in series and are connected between the power supply end first connection confirmation terminal and a power supply end preset power supply after being connected in series, the second control guidance module further comprises a power supply equipment controller and a third detection point, and the power supply equipment controller detects the voltage of the power supply end first connection confirmation terminal through the third detection point; and the power supply equipment controller is also used for controlling the power supply equipment to stop supplying power according to the voltage of the third detection point when the power supply end charging stop switch is in a disconnected state.

In a third aspect, the present invention provides a charge control method applied to the vehicle of the above embodiment, the method including: acquiring the voltage of a first detection point; and when the vehicle-end charging stop switch is in an off state, controlling the vehicle to stop charging according to the voltage of the first detection point.

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

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a vehicle according to another embodiment of the invention;

FIG. 3 is a schematic diagram of a control pilot circuit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a control steering circuit according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a control pilot circuit according to another embodiment of the present invention;

FIG. 6 is a flow chart of a charge control method of one embodiment of the present invention;

FIG. 7 is a flow chart of a charge control method according to an embodiment of the invention;

fig. 8 is a flowchart of a charging control method according to another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The power supply equipment vehicle, the control guidance circuit, and the charge control method of the embodiment of the invention are described below with reference to the drawings.

Fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present invention.

As shown in fig. 1, the vehicle 100 includes: the vehicle-end charging connection resistor R4, the vehicle-end charging switch S2, the vehicle-end charging resistor R7 and the vehicle-end first connection confirmation terminal CC1 are connected, the vehicle-end charging connection resistor R4, the vehicle-end charging switch S2 and the vehicle-end charging resistor R7 are connected between the vehicle-end first connection confirmation terminal CC1 and a vehicle body ground of a vehicle, the vehicle-end charging switch S2 is connected with the vehicle-end charging resistor R7 in parallel, and the vehicle-end charging switch S2 and the vehicle-end charging resistor R7 which are connected in parallel are connected with the vehicle-end charging connection resistor R4 in series. The relative positions of the vehicle-side charging connection resistor R4 and the parallel vehicle-side parking switch S2 and the vehicle-side parking charging resistor R7 in fig. 1 are exemplary, and the two may be interchanged. For convenience of description, the vehicle-end parking switch S2 and the vehicle-end parking resistor R7 connected in parallel are regarded as a vehicle-end parking unit, except for the example shown in fig. 1, one end of the vehicle-end charging connecting resistor R4 may be connected to a vehicle body ground, the other end of the vehicle-end charging connecting resistor R4 is connected to one end of the vehicle-end parking unit, and the other end of the vehicle-end parking unit is connected to the vehicle-end first connection confirmation terminal CC1.

In this embodiment, referring to fig. 1, the vehicle 100 further includes a vehicle controller 110 and a first detecting point 3, the first detecting point 3 may be disposed between the vehicle-end first connection confirmation terminal CC1 and the vehicle-end charging connection resistor R4 and the vehicle-end charging unit after being connected in series, and the vehicle controller 110 detects the voltage of the vehicle-end first connection confirmation terminal CC1 through the first detecting point 3. The vehicle controller 110 is further configured to control the vehicle 100 to stop charging according to the voltage at the first detection point 3 when the end-of-vehicle stop-charging switch S2 is in an off state.

In the example shown in fig. 1, the vehicle 100 may further include a power battery 120, and charge circuit control switches K5 and K6, where the charge circuit control switch K5 is connected between a first end of the power battery 120 and a positive terminal DC + of the direct voltage of the vehicle 100, the charge circuit control switch K6 is connected between a second end of the power battery 120 and a negative terminal DC-of the direct voltage of the vehicle 100, and the vehicle controller 110 may control the charge circuit control switches K5 and K6 to be in an open state when the vehicle 100 is controlled to stop charging according to the voltage at the first detection point 3 (during charging, the vehicle controller 110 controls the charge circuit control switches K5 and K6 to be in a closed state to supply power to the vehicle 100).

Specifically, the vehicle-end parking and charging switch S2 may be a normally closed switch, after the vehicle 100 enters the charging process, if the vehicle-end initiates an emergency stop, the vehicle-end parking and charging switch S2 is switched from closed to open, the vehicle-end parking and charging resistor R7 is switched from a short-circuit state to be connected in series with the vehicle-end charging connection resistor R4, and the voltage at the first detection point changes. From this, through the setting of vehicle end parking and charging switch S2, vehicle end parking and charging resistance R7, can realize that vehicle 100 initiatively initiates scram, and improves the voltage detection degree of accuracy of first check point 3, is convenient for accurately discern vehicle end scram information, and then helps avoiding the risk that the vehicle end can't cut off the high-voltage charging circuit.

In one embodiment of the present invention, as shown in fig. 2, the vehicle 100 further includes: the vehicle end detection resistor R5, the vehicle end detection switch S3 and the vehicle end second connection confirmation terminal CC2 are connected in series, the vehicle end detection resistor R5 is connected with the vehicle end detection switch S3 in series, and the vehicle end detection resistor R5 and the vehicle end detection switch S3 which are connected in series are connected between the vehicle end second connection confirmation terminal CC2 and the vehicle end preset power supply U2. The positions of the vehicle-end detection resistor R5 and the vehicle-end detection switch S3 in fig. 2 are exemplary, and it is also possible that one end of the vehicle-end detection switch S3 is connected to the vehicle-end preset power supply U2, the other end of the vehicle-end detection switch S3 is connected to one end of the vehicle-end detection resistor R5, and the other end of the vehicle-end detection resistor R5 is connected to the vehicle-end second connection confirmation terminal CC2.

In this embodiment, the vehicle 100 further includes a second detecting point 2, the second detecting point 2 is disposed between the end detecting resistor R5 and the end detecting switch S3 connected in series and the end second connection confirming terminal CC2, the vehicle controller 110 detects the voltage of the end second connection confirming terminal CC2 through the second detecting point 2, and the vehicle controller 110 is further configured to detect the charging connection state of the vehicle 100 according to the voltage of the first detecting point 3 and the voltage of the second detecting point 2.

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

When the vehicle 100 is in a charging unconnected state, the line where the vehicle-end first connection confirmation terminal CC1 is located and the line where the vehicle-end second connection confirmation terminal CC2 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 5V, which is the power supply voltage of the vehicle-end preset power supply U2, the voltage of the first detection point 3 is 0V, and the vehicle controller 110 can recognize that the vehicle 100 is in the charging unconnected state through the voltages of the first detection point 3 and the second detection point 2.

When the vehicle 100 is in a charging semi-connection state, a line where the vehicle-end first connection confirmation terminal CC1 is located is disconnected (which may be caused by disconnection of a power supply device such as a charging/discharging connection switch S of a charging pile) and a line where the vehicle-end second connection confirmation terminal CC2 is located are connected, the voltage of the second detection point 2 is 2.5V which is smaller than the power supply voltage of the vehicle-end preset power supply U2, the voltage of the first detection point 3 is 0V, and the vehicle controller 110 can determine that the vehicle interface of the vehicle 100 is connected by the voltage of the first detection point 3 and the voltage of the second detection point 2, and at this time, can send a prompt message to prompt that the vehicle interface is connected, so as to prevent a driver from towing a gun risk caused by engaging in a gear to drive the vehicle. It should be noted that the second detecting point 2 must be disposed on the left side of the vehicle-end detecting switch S3 because: when the second detection point 2 is arranged 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, and the vehicle-end detection switch S3 is disabled (normally closed to normally open), the vehicle controller 110 detects that the voltage of the second detection point 2 is 5V as the supply voltage of the vehicle-end preset power supply U2, so that it is determined by mistake that the vehicle interface is not connected, and at this time, there is a risk that the gun dragging is caused by allowing the vehicle to be in gear.

When the vehicle 100 is in a fully-charged connection state, the line where the vehicle-end first connection confirmation terminal CC1 is located and the line where the vehicle-end second connection confirmation terminal CC2 is located are both connected, the voltage at the second detection point 2 is a voltage smaller than the power supply voltage of the vehicle-end preset power supply U2, for example, 2.5V, the voltage at the first detection point 3 is a normal charging connection voltage (marked as a first voltage), for example, 4V, the power supply device 200 can close the electronic lock, so that reliable locking of a vehicle interface is ensured, and both the vehicle 100 and the power supply device can enter a charging process. After entering the charging process, the vehicle controller 100 may control the vehicle-end detection switch S3 to be turned from on to off, and the voltage at the second detection point 2 to be 0V.

Therefore, the charging connection state of the vehicle can be accurately determined by the vehicle end according to the voltages of the first detection point 3 and the second detection point 2, and the gun dragging can be avoided.

As an example, the resistance of the vehicle-end charging connection resistor R4 is 1K Ω, and the resistance of the vehicle-end charging stop resistor R7 is 9K Ω.

In the example, the invention keeps the vehicle end charging connecting resistor R4 with the resistance value of 1K omega in the existing vehicle, does not need to change the original configuration of the vehicle, can be compatible with the existing standards and parameters, and improves the compatibility. Wherein, set for 9K omega with the resistance, can make the voltage of first check point 3 when car end scram be exactly the integer, do benefit to the accuracy that improves the detection.

The vehicle 100 of the embodiment of the invention can realize the initiative sudden stop of the vehicle end, and is beneficial to avoiding the risk that the vehicle end can not cut off the high-voltage charging loop; moreover, the charging connection state of the vehicle can be accurately identified, and the gun dragging is avoided.

Fig. 3 is a schematic structural diagram of a control pilot circuit according to an embodiment of the present invention.

As shown in fig. 3, the control steering circuit 300 includes: a first control guidance module 310 and a second control guidance module 320, wherein the first control guidance module 310 is disposed on the vehicle 100, and the second control guidance module 320 is disposed on the power supply device 200 (such as a charging pile).

Referring to fig. 3, the first control guide module 310 includes a vehicle-end charging connection resistor R4, a vehicle-end charging switch S2, a vehicle-end charging resistor R7, and a vehicle-end first connection confirmation terminal CC1, the vehicle-end charging connection resistor R4, the vehicle-end charging switch S2, and the vehicle-end charging resistor R7 are connected between the vehicle-end first connection confirmation terminal CC1 and a vehicle body ground of the vehicle 100, the vehicle-end charging switch S2 is connected in parallel with the vehicle-end charging resistor R7, and the vehicle-end charging switch S2 and the vehicle-end charging resistor R7 which are connected in parallel are connected in series with the vehicle-end charging connection resistor R4. The first control guidance module 310 further includes a vehicle controller 110 and a first detection point 3, 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 further configured to control the vehicle 100 to stop charging according to the voltage at the first detection point 3 when the end-of-vehicle stop-charging switch S2 is in an off state.

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

It should be noted that, in the example shown in fig. 3, the vehicle 100 may further include a power battery 120, and charge-loop control switches K5 and K6, where the charge-loop control switch K5 is connected between a first end of the power battery 120 and a positive DC voltage terminal DC + of the vehicle 100, and the charge-loop control switch K6 is connected between a second end of the power battery 120 and a negative DC voltage terminal DC-of the vehicle 100. The vehicle controller 110 may control the charging loop control switches K5 and K6 to be in the open state when the vehicle 100 stops charging according to the voltage at the first detection point 3 (during charging, the vehicle controller 110 controls the charging loop control switches K5 and K6 to be in the closed state to supply power to the vehicle 100).

The power supply apparatus 200 may further include a power supply apparatus power module 220 and power supply loop control switches K1 and K2, wherein the power supply loop control switch K1 is connected between a first end of the power supply apparatus power module 220 and a positive DC voltage terminal DC + 'of the power supply apparatus 200, and the power supply loop control switch K2 is connected between a second end of the power supply apparatus power module 220 and a negative DC voltage terminal DC-' of the power supply apparatus 200. When charging is required, the first control guidance module 210 and the second control guidance module 220 are connected, the body ground of the vehicle 100 is connected with the device ground of the power supply device 200, the vehicle-end first connection confirmation terminal CC1 is connected with the power-end first connection confirmation terminal CC1', the power supply device controller 210 acquires the voltage of the third detection point 1 after receiving a charging start signal, and when it is determined that the power supply device 200 is successfully connected to the vehicle 100 according to the voltage (e.g. 4V), the power supply device controller 210 controls the power supply loop control switches K1 and K2 to be in a closed state, and at the same time, the vehicle controller 210 acquires 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 (e.g. 4V), the vehicle controller 110 controls the charging loop control switches K5 and K6 to be in a closed state, and then a charging process is started, and the power supply device power module 220 starts to supply power to the power battery 120. The power supply apparatus controller 210 may control the power supply loop control switches K1 and K2 to be in an off state when the power supply apparatus 200 stops the power supply in accordance with the voltage at the third detection point 1.

In this embodiment, referring to fig. 3, the vehicle-end charging stop switch S2 and the power supply-end charging stop switch S1 may be normally closed switches. After the vehicle 100 enters the charging process, if the vehicle end initiates an emergency stop, the vehicle end charging switch S2 is turned off from on, the vehicle end charging resistor R7 is turned into series connection with the vehicle end charging connection resistor R4 from a short-circuit state, and the voltage at the first detection point 3 is changed. After the power supply device 200 enters the charging process, if the power supply device 200 starts an emergency stop, the power supply terminal charging stop switch S1 is switched from on to off, the power supply terminal charging stop resistor R6 is switched from a short-circuit state to be connected in series with the power supply terminal charging connection resistor R1, and the voltage at the third detection point 1 is changed. From this, through setting up of vehicle end parking switch S2, vehicle end parking resistance R7, can realize that vehicle 100 initiatively initiates scram, and improve the voltage detection accuracy of first check point 3, be convenient for accurate discernment vehicle end scram information, and then help avoiding the risk that the vehicle end can't cut off the high-pressure charging circuit. Meanwhile, through the setting of the power supply end charging stop switch S1 and the power supply end charging stop resistor R6, the power supply equipment 200 can actively initiate an emergency stop, and the risk that the power supply end cannot cut off a high-voltage charging loop is avoided

As a possible implementation manner, the ratio of the sum of the resistance value of the power supply terminal charging connection resistor R1 and the resistance value of the power supply terminal charging stopping resistor R6 to the sum of the resistance value of the vehicle terminal charging connection resistor R4 and the resistance value of the vehicle terminal charging stopping resistor R7 is 1. For example, the resistance of the power supply terminal charging connection resistor R1 is 2K Ω, the resistance of the power supply terminal charging stop resistor R6 is 3K Ω, the resistance of the vehicle terminal charging connection resistor R4 is 1K Ω, and the resistance of the vehicle terminal charging stop resistor R7 is 9K Ω.

Specifically, the power supply end stop-charge switch S1 and the vehicle end stop-charge switch S2 may be both normally closed switches. Take the example that the power supply voltage of the power supply terminal preset power supply U1 is 12V and the resistance value of the resistor mentioned above. As shown in table 1 below, after the vehicle 100 enters the charging process, the voltage at the first detection point 3 and the voltage at the third detection point 1 are both the first voltage 4V. If the power supply device 200 starts an emergency stop, the power supply terminal charging stop switch S1 is switched from on to off, the voltage of the third detection point 1 and the voltage of the first detection point 3 are both changed from the first voltage 4V to the second voltage 2V, and the voltage of the detection point 3 is 2V. When the vehicle 100 starts to suddenly stop, the vehicle-end stop-charge switch S2 is turned from on to off, and the voltage at the third detection point 1 and the voltage at the first detection point 3 both become the third voltage 10V. If the vehicle 100 and the power supply apparatus 200 initiate an emergency stop at the same time, the switch S1 and the switch S2 are turned off at the same time, and the voltage at the third detection point 1 and the voltage at the first detection point 3 both become 8V.

TABLE 1

Thus, the vehicle controller 110 may determine the sudden stop initiator according to the voltage of the first detection point 3, and the power supply apparatus 210 may determine the sudden stop initiator according to the voltage of the third detection point 1.

In an embodiment of the present invention, as shown in fig. 4, the first control guidance module 310 further 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, and the vehicle-end detection resistor R5 and the power supply-end charging stop switch S3 which are connected in series 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 further includes a power supply terminal detection resistor R3 and a power supply terminal second connection confirmation terminal CC2', and the power supply terminal detection resistor R3 is connected between the power supply terminal second connection confirmation terminal CC2' and the device ground of the power supply device 200.

In this embodiment, referring to fig. 4, the first control guidance module 310 further includes a second detection point 2, and the vehicle controller 110 detects the voltage of the vehicle-end second connection confirmation terminal CC2 through the second detection point 2. Wherein, the vehicle controller 110 is further configured to detect the charging connection status of the vehicle 100 according to the voltage at the first detecting point 3 and the voltage at the second detecting point 2.

As an example, as shown in fig. 5, the second control guidance module 320 may further include: the power supply terminal comprises a power supply terminal interface, wherein a power supply terminal first connection confirmation terminal CC1 'is arranged on the power supply terminal interface, a power supply terminal charge-discharge connection switch S is further arranged on the power supply terminal interface, and the power supply terminal charge-discharge connection switch S is connected with the power supply terminal first connection confirmation terminal CC1' in series.

In this example, referring to fig. 5 and table 1 above, when the vehicle 100 is in the charging unconnected state, the line on which the vehicle-end first connection confirmation terminal CC1 is located and the line on which the vehicle-end second connection confirmation terminal CC2 is located are both open, and the vehicle-end detection switch S3 is in the closed state. The voltage of the second detection point 2 is 5V, which is the power supply voltage of the vehicle-end preset power supply U2, the voltage of the first detection point 3 is 0V, and the vehicle controller 110 can recognize that the vehicle 100 is in the charging unconnected state through the voltages of the first detection point 3 and the second detection point 2.

When the vehicle 100 is in a charging half-connection state, the line where the vehicle-end first connection confirmation terminal CC1 is located is disconnected (which may be caused by disconnection of the power supply-end charging and discharging connection switch S) and the line where the vehicle-end second connection confirmation terminal CC2 is located are connected, the voltage of the second detection point 2 is 2.5V which is smaller than the power supply voltage of the vehicle-end preset power supply U2, the voltage of the first detection point 3 is 0V, the vehicle controller 110 can determine that the vehicle interface of the vehicle 100 is connected through the voltages of the first detection point 3 and the second detection point 2, and at this time, prompt information can be sent to prompt that the vehicle interface is connected, so as to prevent a driver from dragging a gun risk due to the fact that the vehicle is in gear. It should be noted that the second detection point 2 must be disposed on the left side of the vehicle-end detection switch S3 because: when the second detection point 2 is arranged 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, and the vehicle-end detection switch S3 is disabled (normally closed to normally open), the vehicle controller 110 detects that the voltage of the second detection point 2 is 5V as the supply voltage of the vehicle-end preset power supply U2, so that the vehicle interface is determined incorrectly, and at this moment, the risk of dragging the gun due to the fact that the vehicle is allowed to be in gear is existed.

It should be noted that, in the example shown in fig. 5, the power supply apparatus 200 may include a power supply apparatus body and a charging plug connected to the power supply apparatus body, the charging plug is the above power supply terminal interface, and may be in the form of a charging gun. Accordingly, the vehicle 200 may include a vehicle body and a charging socket connected to the vehicle body, and the connection of the power supply apparatus 200 to the vehicle 100 is achieved by the connection of the charging plug to the charging socket. The power supply end charging and discharging connection switch S and the power supply end detection resistor R3 can be arranged 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 arranged in the power supply device body.

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

In an embodiment of the present invention, before charging, whether the switches S1, S2, S3, S are disabled may also be detected 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.

Specifically, referring to fig. 5 and table 1 above, taking the resistance of the resistor R1 as 2K Ω, the resistance of the resistor R6 as 3K Ω, the resistance of the resistor R3 as 1K Ω, the resistance of the resistor R7 as 9K Ω, the resistance of the resistor R4 as 1K Ω, the resistance of the resistor R5 as 1K Ω, the voltage provided by the power supply U1 as 12V, the voltage provided by the power supply U2 as 5V, and the switches S1, S2, S3, and S are all normally closed switches as an example.

When the switch S1 fails, after the vehicle interface is completely connected, the voltages of the third detection point 1 and the first detection point 3 are 2V, and the vehicle controller 110 and the power supply device controller 210 can determine that the power supply device 200 has an emergency stop fault, and at this time, the vehicle controller 110 and the power supply device controller 210 can send prompt information to prompt a user to investigate an emergency stop module of the power supply device 200.

When the switch S2 is disabled, after the vehicle interface is completely connected, the voltages of the third detection point 1 and the first detection point 3 are 10V, and the vehicle controller 110 and the power supply equipment controller 210 can determine that the vehicle 100 has an emergency stop fault, and at this time, the vehicle controller 110 and the power supply equipment controller 210 can send out prompt information to prompt a user to investigate an emergency stop module of the vehicle 100.

When the switch S3 fails, the voltage of the detection point 2 is 0V, the vehicle controller 110 cannot detect gun connection, the voltage of the third detection point 1 is 4V after the vehicle interface is completely connected, the power supply equipment controller 210 judges that the vehicle interface is completely connected to initiate a charging request, but the vehicle 100 does not respond to charging, and at the moment, the vehicle controller 110 and the power supply equipment controller 210 can send prompt information so that a user can conveniently perform troubleshooting through the prompt of the vehicle end and the pile end.

When the switch S fails, 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 after the vehicle interface is completely connected, so that the power supply device 200 cannot enter the charging process, and at this time, the vehicle controller 110 and the power supply device controller 210 can send prompt information to facilitate troubleshooting by a user.

The prompt information may be a prompt tone, a prompt character, a prompt text, etc., and may correspondingly include voltages of the third detection point 1, the second detection point 2, and the first detection point 3.

It should be noted that the setting of the resistance values of the resistors is merely exemplary, and is not limiting, and resistors with other resistance values may be set as needed.

In conclusion, the control guidance circuit provided by the embodiment of the invention can realize that the vehicle end actively initiates an emergency stop, and is beneficial to avoiding the risk that the vehicle end cannot cut off the high-voltage charging loop; moreover, the charging connection state of the vehicle can be accurately identified, and the gun dragging is avoided; and whether each switch fails or not can be detected before charging, and corresponding prompt is sent so that a user can conveniently perform targeted troubleshooting, and smooth charging is ensured.

Fig. 6 is a flowchart of a charge control method according to an embodiment of the present invention.

In the embodiment of the invention, the charging control method is applied to the vehicle 100 described above, and may be executed by the vehicle controller 110. As shown in fig. 6, the charge control method includes:

s61, acquiring the voltage of the first detection point.

And S62, controlling 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.

In an embodiment of the present invention, as shown in fig. 7, the charging control method may further include:

s63, acquiring the voltage of a second detection point;

and S64, detecting the charging connection state of the vehicle according to the voltage of the first detection point and the voltage of the second detection point.

It should be noted that, for other specific embodiments of the charge control method according to the embodiment of the present invention, reference may be made to the vehicle 100 according to the above-described embodiment of the present invention.

According to the charging control method provided by the embodiment of the invention, the vehicle end can actively initiate the emergency stop, and the risk that the vehicle end cannot cut off the high-voltage charging loop is avoided; moreover, the charging connection state of the vehicle can be accurately identified, and the gun dragging is avoided.

In the embodiment of the present invention, the charge control method is applied to the control pilot circuit 300 described above, and may be executed by the vehicle controller 110 and the power supply apparatus controller 210. As shown in fig. 8, the charge control method includes:

and S81, the vehicle controller acquires 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 charging stop switch and the power supply-end charging stop switch is in a disconnected state. And/or the power supply equipment controller acquires the voltage of the third detection point, and controls the power supply equipment to stop supplying power according to the voltage of the third detection point when at least one of the vehicle-end charging stop switch and the power supply-end charging stop switch is in a disconnected state.

Referring to fig. 3-5, when the vehicle-end first connection confirmation terminal CC1 is connected to the power-supply-end first connection confirmation terminal CC1', the voltages of the first detection point 3 and the third detection point 1 are the same.

As one possible embodiment, 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 power supply terminal charging stop switch S1 is in the off state; and/or when the voltage of the third detection point 1 is changed from the first voltage to the second voltage, the power supply equipment controller determines that the power supply terminal charging stop switch S1 is in an off state.

As another possible embodiment, during the charging process, when the voltage at the first detection point 3 changes from the first voltage 4V to a third voltage 10V, the vehicle controller determines that the vehicle-end stop switch S2 is in an off state, wherein the third voltage is different from the second voltage; and/or when the voltage of the third detection point 1 is changed from the first voltage to the third voltage, the power supply equipment controller determines that the vehicle-end stop-charging switch S2 is in an off state.

As a further possible implementation manner, 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 terminal charging stop switch S1 and the switch S2 are both in the off state; and when the voltage of the third detection point 1 is changed from the first voltage to a fourth voltage, the power supply equipment controller determines that the power supply terminal charging stop switch S1 and the vehicle terminal charging stop switch S2 are both in an off state, wherein the fourth voltage is different from the third voltage and the second voltage.

In some embodiments of the present invention, the charge 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 5V of the voltage of the vehicle end preset power supply, 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 a fifth voltage of 2.5V, the vehicle controller determines that the vehicle is in a charging semi-connection state, wherein the fifth voltage is smaller than the voltage of a vehicle end preset power supply; when the voltage of the first detection point 3 is the first voltage 4V and the voltage of the second detection point 2 is the fifth voltage 2.5V, the vehicle controller determines that the vehicle is in a fully-charged connection state.

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

It should be noted that, for other specific embodiments of the charge control method according to the embodiment of the present invention, reference may be made to the control pilot circuit 300 according to the above-mentioned embodiment of the present invention.

According to the charging control method provided by the embodiment of the invention, the vehicle end can actively initiate the emergency stop, and the risk that the vehicle end cannot cut off the high-voltage charging loop is avoided; moreover, the charging connection state of the vehicle can be accurately identified, and the gun dragging is avoided; and whether each switch fails or not can be detected before charging, and corresponding prompt is sent so that a user can conveniently perform targeted troubleshooting, and smooth charging is ensured.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A vehicle, characterized in that the vehicle comprises: the vehicle-end charging connection resistor, the vehicle-end charging switch, the vehicle-end charging resistor and the vehicle-end first connection confirmation terminal are connected between the vehicle-end first connection confirmation terminal and a vehicle body ground of the vehicle, the vehicle-end charging switch is connected with the vehicle-end charging resistor in parallel, and the vehicle-end charging switch and the vehicle-end charging resistor which are connected in parallel are connected with the vehicle-end charging connection resistor in series;

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 for controlling 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.

2. The vehicle of claim 1, further comprising: the vehicle end detection resistor and the vehicle end detection switch are connected in series, the vehicle end detection resistor and the vehicle end detection switch after series connection 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 a second connection confirmation terminal of the vehicle end through the second detection point;

the vehicle controller is further used for detecting the charging connection state of the vehicle according to the voltage of the first detection point and the voltage of the second detection point.

3. The vehicle of claim 1, characterized in that the vehicle-end charging connection resistor has a resistance of 1K Ω and the vehicle-end charging stop resistor has a resistance of 9K Ω.

4. A control steering circuit, comprising: a first control guidance module provided on the vehicle and a second control guidance module provided on the power supply apparatus, wherein,

the first control guidance module comprises a vehicle end charging connecting resistor, a vehicle end charging switch, a vehicle end charging resistor and a vehicle end first connection confirmation terminal, the vehicle end charging connecting resistor, the vehicle end charging switch and the vehicle end charging resistor are connected between the vehicle end first connection confirmation terminal and a vehicle body ground of the vehicle, the vehicle end charging switch is connected with the vehicle end charging resistor in parallel, the vehicle end charging switch and the vehicle end charging resistor after being connected in parallel are connected with the vehicle end charging connecting resistor in series,

the first control guidance module further 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 for controlling the vehicle to stop charging according to the voltage of the first detection point when the vehicle-end charging stop switch is in a disconnected state;

the second control guidance module comprises a power supply end charging connection resistor, a power supply end charging stop switch, a power supply end charging stop resistor and a power supply end first connection confirmation terminal, wherein the power supply end charging stop switch is connected with the power supply end charging stop resistor in parallel, the power supply end charging stop switch and the power supply end charging stop resistor which are connected in parallel are connected with the power supply end charging connection resistor in series and are connected between the power supply end first connection confirmation terminal and a power supply end preset power supply after being connected in series, the second control guidance module further comprises a power supply equipment controller and a third detection point, and the power supply equipment controller detects the voltage of the power supply end first connection confirmation terminal through the third detection point; and the power supply equipment controller is also used for controlling the power supply equipment to stop supplying power according to the voltage of the third detection point when the power supply end charging stop switch is in a disconnected state.

5. The control guidance circuit according to claim 4, wherein the first control guidance module further comprises a vehicle end detection resistor, a vehicle end detection switch and a vehicle end second connection confirmation terminal, the vehicle end detection resistor is connected in series with the vehicle end detection switch, the vehicle end detection resistor and the power supply end charging switch after being connected in series are connected between the vehicle end second connection confirmation terminal and a vehicle end preset power supply,

the first control guidance module further comprises a second detection point, and the vehicle controller detects the voltage of a second connection confirmation terminal of the vehicle end through the second detection point;

6. The control guidance circuit of claim 5 wherein the second control guidance module further comprises a supply detection resistor and a supply second connection confirmation terminal, the supply detection resistor connected between the supply second connection confirmation terminal and a device ground of the power supply device.

7. The control guidance circuit of claim 6, wherein the second control guidance module further comprises a power supply terminal interface on which the power supply terminal first connection confirmation terminal is provided,

the power supply end interface is further provided with a power supply end charging and discharging connecting switch, and the power supply end charging and discharging connecting switch is connected with the first connection confirmation terminal of the power supply end in series.

8. The control guidance circuit according to claim 4, wherein the ratio of the sum of the resistance of the power supply terminal charging connection resistor and the resistance of the power supply terminal charging stop resistor to the sum of the resistance of the vehicle terminal charging connection resistor and the resistance of the vehicle terminal charging stop resistor is 1.

9. The control guidance circuit according to claim 8, wherein the resistance of the power supply terminal charging connection resistor is 2K Ω, the resistance of the power supply terminal charging stop resistor is 3K Ω, the resistance of the vehicle terminal charging connection resistor is 1K Ω, and the resistance of the vehicle terminal charging stop resistor is 9K Ω.

10. The control pilot circuit of claim 5 wherein the vehicle end charging stop switch, the vehicle end detection switch, and the supply end charging stop switch are all normally closed switches,

the vehicle controller is further used for controlling the vehicle end detection switch to be switched off when the vehicle is detected to be in a fully charged connection state.

11. A charge control method, characterized by being applied to a vehicle according to any one of claims 1 to 3, the method comprising:

acquiring the voltage of a first detection point;

and when the vehicle-end charging stop switch is in an off state, controlling the vehicle to stop charging according to the voltage of the first detection point.

12. The charge control method according to claim 11, characterized by further comprising:

acquiring the voltage of a second detection point;

and detecting the charging connection state of the vehicle according to the voltage of the first detection point and the voltage of the second detection point.

13. A charge control method applied to the control pilot circuit according to any one of claims 4 to 10, the method comprising:

the vehicle controller acquires the voltage of a 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 charging stop switch and the power supply-end charging stop switch is in a disconnected state; and/or the presence of a gas in the gas,

and the power supply equipment controller acquires the voltage of a third detection point, and controls the power supply equipment to stop supplying power according to the voltage of the third detection point when at least one of the vehicle-end charging stop switch and the power supply-end charging stop switch is in a disconnected state.

14. The charge control method according to claim 13, wherein, during the charging,

when the voltage of the first detection point is changed from a first voltage to a second voltage, the vehicle controller determines that the power supply terminal charging stop switch is in an off state;

and/or when the voltage of the third detection point is changed from the first voltage to the second voltage, the power supply equipment controller determines that the power supply terminal charging stop switch is in an off state.

15. The charge control method according to claim 13, characterized in that, during charging,

when the voltage of the first detection point is changed 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;

and/or when the voltage of the third detection point is changed from the first voltage to the third voltage, the power supply equipment controller determines that the vehicle-end charging switch is in an off state.

16. The charge control method according to claim 13, wherein, during the charging,

when the voltage of the first detection point is changed from the first voltage to a fourth voltage, the vehicle controller determines that the power supply end charging stop switch and the vehicle end charging stop switch are both in an off state;

and when the voltage of the third detection point is changed from the first voltage to a fourth voltage, the power supply equipment controller determines that the power supply terminal charging stop switch and the vehicle terminal charging stop switch are both in an off state, wherein the fourth voltage is different from the third voltage and the second voltage.

17. The charge control method according to claim 13, characterized by further comprising:

when the voltage of the first detection point is 0 and the voltage of the second detection point is the voltage of a preset power supply at the vehicle end, the vehicle controller determines that the vehicle is in a charging unconnected state;

when the voltage of the first detection point is 0 and the voltage of the second detection point is a fifth voltage, the vehicle controller determines that the vehicle is in a charging semi-connection state, wherein the fifth voltage is smaller than the voltage of the vehicle-end preset power supply;

and when the voltage of the first detection point is the first voltage and the voltage of the second detection point is the fifth voltage, the vehicle controller determines that the vehicle is in a fully-charged connection state.

18. The charge control method according to claim 13, wherein before the start of charging, the method further comprises:

when the voltage of the first detection point is a second voltage and the voltage of the second detection point is a fifth voltage, the vehicle controller determines that the power supply end charging stop switch is invalid;

when the voltage of the first detection point is a third voltage and the voltage of the second detection point is a fifth voltage, the vehicle controller determines that the vehicle-end parking switch is failed;

and when the voltage of the first detection point is a first voltage and the voltage of the second detection point is 0, the vehicle controller determines that the vehicle-end detection switch is invalid.