Vehicle, charging and discharging control method, charging and discharging machine and control guide circuit

Abstract

The embodiment of the invention provides a vehicle, a charging and discharging control method, a charging and discharging motor and a control guide circuit. Relates to the technical field of electric vehicles, and aims to enable a vehicle to quickly identify whether a charging pile supports an AC V2G technology. The vehicle includes a vehicle ground terminal, a vehicle controller, and a first switch. The first end of the first switch is connected with a vehicle grounding terminal, and the second end of the first switch is connected with a vehicle controller. And the vehicle controller is used for controlling the vehicle to discharge when the first switch is in a closed state.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a vehicle, a charge and discharge control method, a charger and discharger, and a control guidance circuit. Background Art

[0002] Compared to traditional fuel vehicles, electric vehicles are highly sought after for their significant energy efficiency, highly intelligent connectivity, and affordable operating costs. However, with the widespread access to the power grid for charging stations and energy storage cabinets, the grid is experiencing significant load during peak hours when a high number of electric vehicles are charging simultaneously.

[0003] To address this issue, V2G (Vehicle-to-Grid) technology emerged. However, currently, it's difficult for vehicles on the market to identify whether a charging station supports AC V2G technology, or the vehicle and the charging station must communicate for a period of time before determining whether the charging station supports AC V2G technology, which is time-consuming and inefficient. Summary of the Invention

[0004] The present invention aims to provide a vehicle, a charge and discharge control method, a charger and discharger, and a control and guidance circuit, which are intended to enable a vehicle to quickly identify whether a charging pile supports AC V2G technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a vehicle, comprising a vehicle ground terminal, a vehicle controller, and a first switch. A first end of the first switch is connected to the vehicle ground terminal, and a second end of the first switch is connected to the vehicle controller. The vehicle controller is configured to control vehicle discharge when the first switch is closed.

[0007] As a possible implementation, the vehicle controller includes a first detection point, the second end of the first switch is connected to the first detection point, and the vehicle controller controls the vehicle to discharge according to the voltage of the first detection point.

[0008] As a possible implementation, the vehicle further includes a first control guide terminal; the second end of the first switch is also connected to the first control guide terminal, and the vehicle controller detects the voltage of the first control guide terminal through the first detection point.

[0009] The first control guide terminal in the vehicle provided in the embodiment of the present application belongs to one of the vehicle interfaces, and the vehicle can be connected to the charging pile (charger and discharger) through the vehicle interface. When the user has a need to discharge the vehicle, the vehicle controller controls the first switch to be in a closed state. The first switch being in a closed state will cause the impedance of the vehicle-end loop to change, thereby causing a change in the voltage at the first control guide terminal. The charging pile can receive the change in voltage. If the charging pile supports AC V2G technology, the charging pile will respond and the voltage will change again. If the charging pile cannot support AC V2G technology, the voltage will not change. Therefore, the vehicle controller can detect the voltage of the first control guide terminal through the first detection point, and quickly and accurately determine whether the charging pile supports AC V2G technology.

[0010] As a possible implementation, the vehicle further includes a first resistor. A first end of the first resistor is connected to a second end of the first switch, a second end of the first resistor is connected to the first control guide terminal and the first detection point, and the first resistor and the first switch are connected in series to form a first branch.

[0011] As a possible implementation, the vehicle further includes a second switch and a second resistor. A first end of the second switch is connected to the vehicle ground terminal, a second end of the second switch is connected to a first end of a second resistor, a second end of the second resistor is connected to the first control guide terminal and the first detection point, and the second switch and the second resistor are connected in series to form a second branch. The first resistor and the second resistor have different resistance values.

[0012] As a possible implementation, the vehicle further includes a third switch and a third resistor. A first end of the third switch is connected to the second end of the first resistor, a second end of the third switch is connected to the first control guide terminal and the first detection point, a first end of the third resistor is connected to the second end of the first resistor, a second end of the third resistor is connected to the first control guide terminal and the first detection point, and the third switch and the third resistor are connected in parallel to form a third branch.

[0013] As a possible implementation manner, the vehicle controller is configured to control the vehicle to discharge according to the voltage at the first detection point when the second switch is in an open state and the first switch is in a closed state.

[0014] As a possible implementation manner, the vehicle controller is further configured to control vehicle charging according to the voltage at the first detection point when the first switch is in an open state and the second switch is in a closed state.

[0015] As one possible implementation, the vehicle controller is configured to control the vehicle to discharge based on the voltage at the first detection point when the first switch is closed and the third switch is closed. Alternatively, the vehicle to discharge based on the voltage at the first detection point when the first switch is closed and the third switch is open.

[0016] As one possible implementation, the vehicle controller is configured to control vehicle charging based on the voltage at the first detection point when the first switch and the third switch are both closed. Alternatively, the vehicle controller is configured to control vehicle charging based on the voltage at the first detection point when the first switch is closed and the third switch is open.

[0017] As a possible implementation, the vehicle further includes a resistance unit, a first end of the resistance unit is connected to the vehicle ground terminal, and a second end of the resistance unit is connected to a first detection point of the vehicle controller.

[0018] As a possible implementation, the vehicle further includes a diode, wherein a cathode of the diode is connected to the first detection point, and an anode of the diode is connected to the first control guide terminal.

[0019] As a possible implementation, the vehicle further includes a first AC charging and discharging interface and / or a charger, the charger is connected to the charger via the first AC charging and discharging interface, and the charger is connected to the vehicle controller via the first branch.

[0020] As a possible implementation manner, the charger is further connected to the vehicle controller via a second branch.

[0021] In a second aspect, an embodiment of the present application further provides a charge and discharge control method, which is applied to the vehicle mentioned in the first aspect. The charge and discharge control method includes: controlling the first switch to be in a closed state to control the vehicle to discharge.

[0022] As a possible implementation, when the vehicle controller includes a first detection point, controlling the first switch to be in a closed state, and controlling vehicle discharge includes: controlling the first switch to be in a closed state, and discharging the vehicle according to the voltage of the first detection point.

[0023] As a possible implementation, when the switch circuit includes a first branch and a second branch, the charge and discharge control method includes: when the vehicle is discharging, controlling the first switch to be in a closed state and controlling the second switch to be in an open state.

[0024] As a possible implementation, when the switch circuit includes a first branch and a second branch, the charge and discharge control method includes: when the vehicle is charging, controlling the first switch to be in an open state and controlling the second switch to be in a closed state.

[0025] As a possible implementation, the charge and discharge control method further includes: when the vehicle is discharging, controlling the second branch to be in an off state, and controlling the first branch to switch between an on state and an off state, so as to send the first communication information through the vehicle.

[0026] As a possible implementation, the first communication information includes first confirmation information, first fault information, and / or first firmware information. The first confirmation information indicates the charge and discharge status of the vehicle. The first fault information indicates whether the vehicle is faulty. The first firmware information includes a vehicle identification number.

[0027] As a possible implementation method, when the vehicle is discharging, before controlling the first switch to be in a closed state, the charge and discharge control method also includes: receiving a pulse signal through a first detection point, and when the pulse signal received by the vehicle is a preset pulse signal, controlling the first switch to be in a closed state, and the vehicle discharges.

[0028] As a possible implementation manner, the amplitude of the preset pulse signal satisfies a preset amplitude.

[0029] As a possible implementation, when the vehicle is discharging, controlling the first switch to be in a closed state further includes: after controlling the first switch to be in a closed state, obtaining first discharge matching confirmation information within a preset time, and then starting the vehicle to discharge.

[0030] As a possible implementation, the charge-discharge control method further includes: receiving a pulse signal at a first detection point, the pulse signal including periodic high and low levels, wherein the high level is greater than a first preset voltage value and the low level is less than or equal to the first preset voltage value. When the vehicle is discharging, controlling the first branch to switch between an on state and an off state specifically includes: controlling the first branch to switch between an on state and / or an off state while the high level persists.

[0031] As a possible implementation, when the first branch includes a first switch and the second branch includes a second switch, controlling the first branch to switch between an on state and an off state includes: controlling the first switch to switch between a closed state and / or an open state. Controlling the second branch to be in an off state includes: controlling the second switch to be in an off state.

[0032] As a possible implementation manner, the charge and discharge control method further includes: during the vehicle discharging process, obtaining second communication information sent by the charger and discharger.

[0033] As a possible implementation, when the vehicle is discharging, the first switch is controlled to be in an open state or a closed state, and the second switch is controlled to be in an open state, and the second communication information sent by the charger is obtained.

[0034] As a possible implementation, the second communication information includes third confirmation information, second fault information, and / or second firmware information. The third confirmation information indicates the charge / discharge status of the charger / discharger. The second fault information indicates whether the charger / discharger is faulty. The second firmware information includes an identification number of the charger / discharger.

[0035] In a third aspect, embodiments of the present application provide a charger / discharger, comprising a charger / discharger ground terminal, a device controller, and a fourth switch. A first end of the fourth switch is connected to the charger / discharger ground terminal, and a second end of the fourth switch is connected to the device controller. The device controller is configured to control the closing of the fourth switch to transmit a first discharge matching confirmation message to a vehicle.

[0036] As a possible implementation manner, the device controller includes a third detection point, and the second end of the fourth switch is connected to the third detection point.

[0037] As a possible implementation manner, the charger and discharger further includes a second control guide terminal, and the second end of the fourth switch is connected to the second control guide terminal.

[0038] As a possible implementation, the device controller detects the voltage of the second control guiding terminal via a third detection point. And / or the device controller is configured to determine whether the vehicle supports vehicle-to-grid discharge based on the voltage of the second control guiding terminal, and, if the vehicle supports vehicle-to-grid discharge, control the closing of the fourth switch to send first discharge matching confirmation information to the vehicle.

[0039] As a possible implementation manner, the device controller controls the fourth switch to switch between a closed state and an open state to send a preset pulse signal to the vehicle.

[0040] As a possible implementation, the charger and discharger also includes a fourth resistor, a first end of the fourth resistor is connected to the second end of the fourth switch, a second end of the fourth resistor is connected to the second control guide terminal and the third detection point, and the fourth switch and the fourth resistor are connected in series to form a fourth branch.

[0041] As a possible implementation, the charger / discharger further includes a fifth switch and a fifth resistor. The device controller includes a pulse power supply terminal and a constant voltage power supply terminal. The first selection terminal of the fifth switch can be connected to the pulse power supply terminal of the device controller, the second selection terminal of the fifth switch can be connected to the constant voltage power supply terminal of the device controller, the common terminal of the fifth switch is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is connected to the third detection point. The pulse power supply terminal periodically emits high and low levels.

[0042] As a possible implementation, the charger and discharger further includes a second AC charging and discharging interface.

[0043] In a fourth aspect, an embodiment of the present application provides a charge and discharge control method, which is applied to the charger and discharge machine mentioned in the third aspect. The charge and discharge control method includes: controlling the closing of the fourth switch to send a first discharge matching confirmation message to the vehicle.

[0044] As a possible implementation, the charge and discharge control method further includes: when the charger and discharger are charging, controlling the fourth branch to switch between an on state and an off state, so as to send the second communication information through the charger and discharger.

[0045] As a possible implementation, the second communication information includes third confirmation information, second fault information, and / or second firmware information. The third confirmation information indicates the charge / discharge status of the charger / discharger. The second fault information indicates whether the charger / discharger is faulty. The second firmware information includes an identification number of the charger / discharger.

[0046] As a possible implementation, the charge and discharge control method further includes: when the third detection point receives the second discharge matching confirmation information, controlling the fourth branch to be in a conductive state to send the first discharge matching confirmation information to the vehicle through the third detection point.

[0047] As one possible implementation, while the charger / discharger is charging, a pulse signal is sent to the vehicle via the third detection point. The pulse signal includes periodic high and low levels. The high level is greater than a second preset voltage value, and the low level is less than or equal to the second preset voltage value. While the high level persists, the fourth branch is controlled to switch between an on state and / or an off state to transmit the second communication information.

[0048] As a possible implementation, when the fourth branch includes a fourth switch, controlling the fourth branch to switch between an on state and / or an off state includes controlling the fourth switch to switch between closed and / or open to transmit the second communication information.

[0049] As a possible implementation, when the fourth branch includes a fourth switch, the charger and discharger is charging and does not send the second communication information, the fourth switch is in a first state or a second state, the first state is one of normally closed or normally open, and the second state is the other of normally closed or normally open.

[0050] As a possible implementation, when the charger / discharger is charging and sending the second communication information, the fourth switch is in a third state, which is switched between closed and open.

[0051] As a possible implementation, when the fourth switch switches from the first state to the second state or from the second state to the first state and lasts for at least a preset time, the charger and discharger sends second communication information, which is second fault information.

[0052] As a possible implementation, when the fourth branch includes a fourth switch, controlling the fourth branch to be in a conducting state includes: controlling the fourth switch to be in a closed state, and sending first discharge matching confirmation information to the vehicle through the third detection point.

[0053] As a possible implementation manner, the charge and discharge control method further includes: acquiring first communication information sent by the vehicle.

[0054] As a possible implementation, while the charger / discharger is charging, a pulse signal is sent to the vehicle via the third detection point. The pulse signal includes periodic high and low levels. During the high level period, the fourth branch is controlled to be in an open or closed state to obtain the first communication information sent by the vehicle.

[0055] As a possible implementation method, the charge and discharge control method also includes: controlling the fourth branch in the charger and discharger to switch between an on state and / or an off state to send a preset pulse signal to the vehicle, wherein the amplitude of the preset pulse signal meets a preset amplitude.

[0056] In a fifth aspect, embodiments of the present application provide a control and guidance circuit, comprising a vehicle-side guidance circuit and a pile-side guidance circuit. The vehicle-side guidance circuit includes a vehicle ground terminal, a vehicle controller, and a first switch. The first end of the first switch is connected to the vehicle ground terminal, and the second end of the first switch is connected to the vehicle controller. The pile-side guidance circuit includes a charger-discharger ground terminal, a device controller, and a fourth switch. The first end of the fourth switch is connected to the charger-discharger ground terminal, and the second end of the fourth switch is connected to the device controller.

[0057] As a possible implementation, the vehicle controller includes a first detection point, and the second end of the first switch is connected to the first detection point; the device controller includes a third detection point, and the second end of the fourth switch is connected to the third detection point.

[0058] As a possible implementation, the vehicle-end steering circuit further includes a first control steering terminal, and the pile-end steering circuit further includes a second control steering terminal; the second end of the first switch is connected to the first control steering terminal, and the second end of the fourth switch is connected to the second control steering terminal.

[0059] As one possible implementation, the vehicle controller detects the voltage of the first control guide terminal via a first detection point. The vehicle controller is configured to control vehicle discharge based on the voltage at the first detection point when the first switch is closed. The device controller is configured to control the closing of a fourth switch to transmit a first discharge matching confirmation message to the vehicle.

[0060] As a possible implementation, the vehicle-side steering circuit further includes a first resistor. A first end of the first resistor is connected to a second end of the first switch, and a second end of the first resistor is connected to the first control steering terminal and the first detection point. The first resistor and the first switch are connected in series to form a first branch.

[0061] As a possible implementation, the vehicle-side guidance circuit further includes a second switch and a second resistor. A first end of the second switch is connected to the vehicle ground terminal, a second end of the first switch is connected to a first end of a second resistor, a second end of the second resistor is connected to the first control guidance terminal and the first detection point, and the second switch and the second resistor are connected in series to form a second branch. The first and second resistors have different resistance values.

[0062] As a possible implementation, the pile end steering circuit also includes a fourth resistor, the first end of the fourth resistor is connected to the second end of the fourth switch, the second end of the fourth resistor is connected to the second control steering terminal and the third detection point, and the fourth switch and the fourth resistor are connected in series to form a fourth branch.

[0063] As a possible implementation, the vehicle-end steering circuit further includes a diode, wherein the cathode of the diode is connected to the first detection point, and the anode of the diode is connected to the first control steering terminal.

[0064] As a possible implementation, the pile-end steering circuit further includes a fifth switch and a fifth resistor. The device controller includes a pulse power supply terminal and a constant voltage power supply terminal. The first selectable terminal of the fifth switch can be connected to the pulse power supply terminal of the device controller, and the second selectable terminal of the fifth switch can be connected to the constant voltage power supply terminal of the device controller. The common terminal of the fourth switch is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is connected to the third detection point. The pulse power supply terminal periodically emits high and low levels.

[0065] In a sixth aspect, embodiments of the present application provide a charge and discharge control method for executing the control steering circuit described in the fifth aspect and its possible implementations. The charge and discharge control method includes controlling a first switch to be in a closed state and controlling the vehicle to discharge to charge the charger and discharger.

[0066] As a possible implementation method, when the vehicle controller includes a first detection point, the first switch is in a closed state, and the vehicle is controlled to discharge, including the vehicle controller detecting the voltage of the first control guide terminal through the first detection point, and controlling the first switch to be in a closed state, and controlling the vehicle to discharge to the charger and discharger according to the voltage of the first detection point to charge the charger and discharger.

[0067] As a possible implementation, before charging the charger / discharger, the charge / discharge control method further includes: the vehicle controller controlling the first switch to be in a closed state to transmit a second discharge match confirmation message to the charger / discharger. Upon receiving the second discharge match confirmation message at the third detection point, the device controller controlling the fourth branch to be in a conductive state to transmit the first discharge match confirmation message to the vehicle via the third detection point. After the first switch is closed, if the vehicle controller receives the first discharge match confirmation message within a preset time, the vehicle begins discharging.

[0068] As a possible implementation, the charge-discharge control method further includes: when the vehicle is discharging, controlling the second branch to be in an off state, controlling the first branch to switch between an on state and an off state, so as to transmit first communication information via the vehicle; and controlling the fourth branch to switch between an on state and an off state, so as to transmit second communication information via the charger / discharger.

[0069] As one possible implementation, when the vehicle is discharging, a pulse signal is sent to the vehicle via the third detection point. The pulse signal includes periodic high and low levels. During the high-level period, the fourth branch is controlled to be in an open or closed state to obtain the first communication information sent by the vehicle. The first switch is controlled to be in an open or closed state to obtain the second communication information sent by the charger / discharger.

[0070] As a possible implementation, the first communication information includes first confirmation information, first fault information, and / or first firmware information. The first confirmation information indicates the vehicle's charge and discharge status. The first fault information indicates whether the vehicle is faulty. The first firmware information includes a vehicle identification number. The second communication information includes third confirmation information, second fault information, and / or second firmware information. The third confirmation information indicates the charge and discharge status of the charger / discharger. The second fault information indicates whether the charger / discharger is faulty. The second firmware information includes the charger / discharger's identification number.

[0071] As a possible implementation, controlling the first branch to switch between an on state and an off state specifically includes: controlling the first branch to switch between an on state and / or an off state while the high level persists. Controlling the fourth branch to switch between an on state and an off state specifically includes: controlling the fourth branch to switch between an on state and / or an off state while the high level persists.

[0072] As a possible implementation method, before charging the charger and discharger, the charge and discharge control method also includes: controlling the four branches to switch between the on state and / or the off state to send a preset pulse signal to the vehicle, and when the pulse signal received by the vehicle is the preset pulse signal, controlling the first switch to be in a closed state and the vehicle discharges, wherein the amplitude of the preset pulse signal meets the preset amplitude.

[0073] As a possible implementation, when the first branch includes a first switch, the second branch includes a second switch, and the fourth branch includes a fourth switch, controlling the first branch to switch between an on state and an off state includes: controlling the first switch to switch between closed and / or open. Controlling the second branch to be in an open state includes: controlling the second switch to be in an open state. Controlling the fourth branch to switch between an on state and / or an off state includes: controlling the fourth switch to switch between closed and / or open. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0075] Figure 1 A schematic diagram of an internal circuit of a vehicle provided by an embodiment of the present invention;

[0076] Figure 2 Another schematic diagram of a vehicle internal circuit provided by an embodiment of the present invention;

[0077] Figure 3 Another schematic diagram of a vehicle internal circuit provided by an embodiment of the present invention;

[0078] Figure 4 Another schematic diagram of a vehicle internal circuit provided by an embodiment of the present invention;

[0079] Figure 5 Another schematic diagram of a vehicle internal circuit provided by an embodiment of the present invention;

[0080] Figure 6 Another schematic diagram of a vehicle internal circuit provided by an embodiment of the present invention;

[0081] Figure 7 A schematic diagram of a circuit for connecting a charger and a vehicle provided by an embodiment of the present invention;

[0082] Figure 8 A schematic diagram of a circuit for connecting another charger and discharger to a vehicle according to an embodiment of the present invention;

[0083] Figure 9A schematic diagram of an equivalent circuit provided by an embodiment of the present invention;

[0084] Figure 10 A waveform diagram provided by an embodiment of the present invention;

[0085] Figure 11 Another waveform diagram provided by an embodiment of the present invention;

[0086] Figure 12 A schematic diagram of a circuit for connecting another charger and discharger to a vehicle according to an embodiment of the present invention;

[0087] Figure 13 A schematic diagram of a circuit for connecting another charger and discharger to a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0089] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0090] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connect" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "connected" in the present invention have the meaning of conducting electricity. Their specific meanings should be understood in the context.

[0091] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0092] As mentioned in the background, it's difficult for vehicles on the market to identify whether a charging pile supports AC V2G technology, or the vehicle and the charging pile must communicate to determine whether the charging pile supports AC V2G technology. However, as more and more new energy vehicles support V2G technology, users who want to earn a certain amount of economic benefit by discharging their idle vehicles need to spend a lot of time and money to identify the charging pile. Charging piles also have difficulty identifying whether a vehicle supports V2G technology.

[0093] In view of this, an embodiment of the present invention provides a vehicle, illustratively, such as Figure 1 As shown, the vehicle 100 includes a vehicle ground terminal, a vehicle controller 30, and a first switch 211. A first end of the first switch 211 is connected to the vehicle ground terminal, and a second end of the first switch 211 is connected to the vehicle controller 30. The vehicle controller 30 is used to control the discharge of the vehicle 100 when the first switch 211 is closed.

[0094] In some embodiments, the vehicle controller 30 includes a first detection point 30-1, to which the second end of the first switch 211 is connected. The vehicle controller 30 controls the discharge of the vehicle 100 based on the voltage at the first detection point 30-1. The vehicle 100 also includes a first control pilot terminal; the second end of the first switch 211 is also connected to the first control pilot terminal. The vehicle controller 30 detects the voltage of the first control pilot terminal via the first detection point 30-1.

[0095] The vehicle 100 includes a vehicle ground terminal, a first control guide terminal (vehicle-side CP), a vehicle controller 30, and a first switch 211. The vehicle controller 30 includes a first detection point 30-1, exemplarily a detection point 2 of the vehicle controller. A first end of the first switch 211 is connected to the vehicle ground terminal, and a second end of the first switch 211 is connected to the first control guide terminal and the first detection point 30-1. The vehicle controller 30 detects the voltage of the first control guide terminal via the first detection point 30-1. When the first switch 211 is closed, the vehicle controller 30 controls the discharge of the vehicle 100 based on the voltage at the first detection point.

[0096] The first control guide terminal in the vehicle 100 provided in the embodiment of the present application belongs to one of the vehicle interfaces 101, and the vehicle 100 can be connected to the charging pile (charger and discharger) through the vehicle interface 101. When the user has a need to discharge the vehicle 100, the vehicle controller 30 controls the first switch 211 to be in a closed state. The first switch 211 being in a closed state will cause the impedance of the vehicle-end loop to change, thereby causing a change in the voltage at the first control guide terminal. The charging pile can receive the change in voltage. If the charging pile supports AC V2G technology, the charging pile will respond, and the voltage will change again. If the charging pile cannot support AC V2G technology, the voltage will not change. Therefore, the vehicle controller 30 can detect the voltage of the first control guide terminal through the first detection point 30-1, and quickly and accurately determine whether the charging pile supports AC V2G technology. As a possible implementation method, refer to Figure 1 The vehicle 100 further includes a first resistor 212. A first end of the first resistor 212 is connected to a second end of the first switch 211. A second end of the first resistor 212 is connected to the first control guide terminal and the first detection point 30-1. The first resistor 212 and the first switch 211 are connected in series to form a first branch 21.

[0097] The closing and opening of the first switch 211 controls the conduction and disconnection of the first branch 21. When the first switch 211 is open, the first branch 21 is in the disconnected state, and the first resistor 212 is not connected to the vehicle-end circuit. When the first switch 211 is closed, the first branch 21 is connected, and the first resistor 212 is connected to the vehicle-end circuit. The connection or disconnection of the first resistor 212 causes the impedance of the vehicle-end circuit to change, causing the voltage of the first control guide terminal to change. Therefore, when the vehicle 100 has a discharge demand, the first branch 21 is switched from the disconnected state to the conductive state, and communication is performed with the charger to determine whether the charger supports AC V2G technology. The charger learns the discharge demand of the vehicle 100 based on the detected voltage.

[0098] In some embodiments, for example, Figure 2 As shown, vehicle 100 further includes a second switch 221 and a second resistor 222. A first end of second switch 221 is connected to the vehicle ground terminal, a second end of second switch 221 is connected to a first end of second resistor 222, a second end of second resistor 222 is connected to the first control guide terminal and first detection point 30-1, and second switch 221 and second resistor 222 are connected in series to form a second branch 22. First resistor 212 and second resistor 222 have different resistance values.

[0099] The first end 21-1 of the first branch 21 is connected to the vehicle ground terminal, and the second end 21-2 of the first branch 21 is connected to the first control guide terminal and the first detection point 30-1 of the vehicle controller 30. The first end 22-1 of the second branch 22 is connected to the vehicle ground terminal, and the second end 22-2 of the second branch 22 is connected to the first control guide terminal and the first detection point 30-1 of the vehicle controller 30. The first ends of the first branch 21 and the second branch 22 are connected to the vehicle ground terminal, and the second ends of the first branch 21 and the second branch 22 are both connected to the first detection point 30-1, meaning that the first branch 21 and the second branch 22 are connected in parallel. When the first branch 21 is conductive, a closed loop is formed between the vehicle ground terminal, the first branch 21, and the first detection point 30-1. When the second branch 22 is conductive, a closed loop is formed between the vehicle ground terminal, the second branch 22, and the first detection point 30-1.

[0100] Existing charging piles have difficulty identifying the charging and discharging status of a car, which may cause communication errors between the charging pile and the electric car, which may cause inaccurate charging records, and may also cause unstable power grid load, affecting the normal operation of the power grid. Misidentification may even cause safety accidents such as overheating, fire or explosion. The first resistor 212 and the second resistor 211 in the vehicle provided by this application have different resistance values, so the first branch 21 and the second branch 22 have different impedances in the conductive state. Therefore, the conduction of different branches is controlled separately in the case of charging and discharging. For example, when the vehicle 100 is charging, the first switch 211 is controlled to be disconnected and the second switch 221 is controlled to be closed; when the vehicle 100 is discharging, the first switch 211 is controlled to be closed and the second switch 221 is controlled to be disconnected. The charging pile can accurately determine the charging and discharging status of the vehicle 100 based on the voltage difference.

[0101] As a possible implementation, the vehicle controller 30 is configured to control the vehicle 100 to discharge according to the voltage of the first detection point 30 - 1 when the second switch 222 is in an open state and the first switch 212 is in a closed state.

[0102] As a possible implementation, the vehicle controller 30 is further configured to control the charging of the vehicle 100 according to the voltage of the first detection point 30 - 1 when the first switch 212 is in an open state and the second switch 222 is in a closed state.

[0103] It should be understood that the first resistor 212 may also be a resistor set formed by connecting multiple resistors in series, multiple resistors in parallel, or multiple resistors in series, and the second resistor 222 may also be a resistor set formed by connecting multiple resistors in series, multiple resistors in parallel, or multiple resistors in series. Figure 2 What is reflected is the equivalent first resistor 212 and second resistor 222 .

[0104] It should be understood that the magnitude relationship between the first resistor 212 and the second resistor 222 is not specifically limited. As long as the resistance values of the first resistor 212 and the second resistor 222 are different, it is sufficient that the voltages measured at the first detection point 30-1 are different after different switches are closed. Similarly, the magnitude relationship between the two voltages is not specifically limited.

[0105] It should be understood that in actual applications, the vehicle controller 30 actually detects a portion of the voltage in the vehicle-side circuit, for example, the voltage across the first resistor 212. The magnitude of this voltage may not be exactly the same as the voltage at the first control guide terminal, for example, due to the influence of a diode voltage drop. In the embodiment of the present application, the first end of the first resistor 212 is connected to the vehicle ground terminal, and the second end is connected to the first detection point 30-1 of the vehicle controller 30. In this case, the first detection point 30-1 is one of the vehicle controller I / O ports, and the equivalent voltage across the first resistor 212 is measured. In actual applications, as long as the equivalent voltage across the first resistor 212 can be measured, that is, the first detection point 30-1, the embodiment of the present application does not limit the location of the first detection point 30-1, and it can also be located outside the vehicle controller 30, such as one of the other I / O ports. The second and third detection points described below are similar and will not be described in detail.

[0106] In some embodiments, for example, Figure 3 As shown. Vehicle 100 also includes a third switch 231 and a third resistor 232. A first end of third switch 231 is connected to the second end of first resistor 212, a second end of third switch 231 is connected to the first control guide terminal and the first detection point, a first end of third resistor 232 is connected to the second end of first resistor 212, a second end of third resistor 232 is connected to the first control guide terminal and the first detection point, and third switch 231 and third resistor 232 are connected in parallel to form a third branch 23.

[0107] The third branch 23 and the first branch 21 are connected in series between the vehicle ground terminal and the vehicle controller 30. When the first switch 211 is open, neither the first resistor 212 nor the third resistor 232 is connected to the circuit. When both the first switch 211 and the third switch 231 are closed, the third resistor 232 is short-circuited, leaving only the first resistor 212 connected to the circuit. When the first switch 211 is closed and the third switch 231 is open, the first resistor 212 and the third resistor 232 are connected to the circuit in series. Because the impedance of the connected circuit varies depending on whether the first and third switches 211 and 231 are closed or open, different voltages can be measured at the first detection point 30-1 depending on the states of the first and third switches 211 and 231.

[0108] Therefore, depending on needs and actual application scenarios, the first switch 211 and the third switch 231 can be controlled to communicate with the charger and discharger to determine whether the charger and discharger supports AC V2G technology. For example, the vehicle controller 30 is configured to control the discharge of the vehicle 100 based on the voltage at the first detection point 30-1 when the first switch 211 is closed and the third switch 231 is closed. Alternatively, the vehicle 100 is configured to control the discharge of the vehicle 100 based on the voltage at the first detection point 30-1 when the first switch 211 is closed and the third switch 231 is open.

[0109] For another example, the vehicle controller 30 is configured to control the charging of the vehicle 100 based on the voltage at the first detection point 30-1 when the first switch 211 and the third switch 231 are closed. Alternatively, the vehicle controller 30 is configured to control the charging of the vehicle 100 based on the voltage at the first detection point 30-1 when the first switch 211 is closed and the third switch 231 is open.

[0110] In some embodiments, for example, Figure 4 The vehicle 100 further includes a resistor unit 3 , a first end of the resistor unit 3 being connected to the vehicle ground terminal, and a second end of the resistor unit 3 being connected to a first detection point 30 - 1 of the vehicle controller 30 .

[0111] As a possible implementation, the resistance unit 3 includes at least one fixed value resistor 31. Figure 4 3 shows a case where resistance unit 3 includes a single fixed-value resistor 31. One end of fixed-value resistor 31 is connected to the vehicle ground terminal, and the other end of fixed-value resistor 31 is connected to a first detection point 30-1 of vehicle controller 30. If resistance unit 3 includes multiple fixed-value resistors 31, the multiple fixed-value resistors 31 are connected in series and / or in parallel.

[0112] For example, Figure 5 As shown, vehicle 100 also includes a diode 32. The cathode of diode 32 is connected to first detection point 30-1, and the anode of diode 32 is connected to the first control guide terminal. By placing diode 32 between first detection point 30-2 and the first control guide terminal, the charger / discharger can verify that the vehicle 100, rather than a load device, is connected to the charger / discharger before energy transfer occurs, based on the presence of diode 32.

[0113] As a possible implementation, refer to Figure 5The vehicle 100 also includes a first AC charging and discharging interface (i.e., a vehicle interface) 101 and / or a charger 20. The charger 20 is connected to the charger through the first AC charging and discharging interface 101. The charger 20 is connected to the vehicle controller 30 through a first branch. The charger 20 is also connected to the vehicle controller 30 through a second branch.

[0114] For example, the charger is a bidirectional charger, that is, it can both charge and support discharge. The resistance of the first resistor 212 is smaller than that of the second resistor 222. When the vehicle is in the charging process, the first switch 211 is disconnected and the second switch 221 is closed. When the vehicle is in the discharging process, the first switch 211 is closed and the second switch 221 is disconnected. Taking the voltage of the first detection point as 6V when the second switch 221 is closed and the first switch 211 is disconnected as an example, since the first branch 21 is connected to the second branch 22 in parallel, when the first resistor 212 is connected to the circuit, that is, when the first branch is turned on, the voltage will be lower. Therefore, when the voltage detected by the charging pile is 6V, it means that the vehicle 100 is in the charging process. When the voltage detected by the charging pile is less than 6V, it means that the vehicle 100 is in the discharging process.

[0115] As a possible implementation, for example, Figure 6 As shown, the first AC charging and discharging interface 101 (hereinafter also referred to as the vehicle interface) includes a first AC power phase terminal (vehicle end L1), a second AC power phase terminal (vehicle end L2), a third AC power phase terminal (vehicle end L3), and a first AC power neutral terminal (vehicle end N). The first AC power phase terminal, the second AC power phase terminal, the third AC power phase terminal, and the first AC power neutral terminal are respectively connected to the first live wire connection terminal 20-1a, the second live wire connection terminal 20-1b, the third live wire connection terminal 20-1c, and the neutral wire connection terminal 20-2 of the charger 20.

[0116] Reference Figure 6 As a possible implementation, the vehicle interface 101 further includes a first protective grounding terminal (vehicle end PE), which is connected to the vehicle grounding terminal.

[0117] Reference Figure 6 As a possible implementation, the vehicle interface 101 further includes a first connection confirmation terminal (vehicle-side CC), and the vehicle controller 30 further includes a second detection point 30-2, for example, second detection point 30-2 is detection point three. The first connection confirmation terminal is connected to the second detection point 30-2, and the vehicle controller 30 measures the resistance between the first connection confirmation terminal and the first protective grounding terminal via the second detection point 30-2. The vehicle controller 30 is also used to confirm the connection status between the charger and the vehicle 100.

[0118] The present application also provides a charging and discharging machine, which is exemplary, referring to Figure 7 The charger / discharger 200 includes a charger / discharger ground terminal, a device controller 40 , and a fourth switch 41 . A first end of the fourth switch 41 is connected to the charger / discharger ground terminal, and a second end of the fourth switch 41 is connected to the device controller 40 .

[0119] In some embodiments, the device controller 40 includes a third detection point 40-1, and the second end of the fourth switch 41 is connected to the third detection point 40-1. The charger 200 also includes a second control guide terminal, and the second end of the fourth switch 41 is connected to the second control guide terminal. When the charger 200 includes a charger ground terminal, a second control guide terminal (pile terminal CP), the device controller 40, and the fourth switch 41, the device controller 40 includes the third detection point 40-1, for example, when the third detection point 40-1 is detection point 1. The first end of the fourth switch 41 is connected to the charger ground terminal, and the second end of the fourth switch 41 is connected to the second control guide terminal and the third detection point 40-1. The device controller 40 is configured to control the closing of the fourth switch 41 to send a first discharge matching confirmation message to the vehicle 100.

[0120] As a possible implementation, refer to Figure 7 The charger / discharger 200 further includes a fourth resistor 42 , a first end of the fourth resistor 42 being connected to a second end of the fourth switch 41 , a second end of the fourth resistor 42 being connected to the second control guide terminal and the third detection point 40 - 1 , and the fourth switch 41 and the fourth resistor 42 being connected in series to form a fourth branch 4 .

[0121] When the fourth branch 4 is in the on state, the fourth switch 41 is closed and the fourth resistor 42 is connected to the circuit. When the fourth branch 4 is in the off state, the fourth switch 41 is disconnected and the fourth resistor 42 is not connected to the circuit. In this case, the resistance value of the fourth resistor 42 determines the size of the predetermined impedance.

[0122] In an embodiment of the present application, the charger / discharger 200 can proactively send a signal requesting charging to the vehicle 100, and the charger / discharger 200 can also respond to a signal requesting discharge from the vehicle 100. The signal proactively sent by the charger / discharger 200 to the vehicle 100 to request charging is a preset pulse signal. Exemplarily, the preset pulse signal is a voltage signal that meets a preset amplitude. The charger / discharger 200 can respond to the signal requesting discharge from the vehicle 100 with a first discharge matching confirmation message, and the signal requesting discharge from the vehicle 100 to the charger / discharger 200 is a second discharge matching confirmation message. Exemplarily, the first and second discharge matching confirmation messages are voltage signals whose voltages meet certain amplitude requirements.

[0123] As a possible implementation, the charge and discharge control method further includes: controlling the fourth branch 4 in the charger and discharge machine 200 to switch between an on state and / or an off state to send a preset pulse signal to the vehicle 100,

[0124] As a possible implementation, the device controller 40 detects the voltage of the second control guiding terminal via the third detection point 40-1. Alternatively, the device controller 40 is configured to determine whether the vehicle 100 supports discharging from the vehicle 100 to the grid based on the voltage of the second control guiding terminal. If the vehicle 100 supports discharging from the vehicle 100 to the grid, the device controller 40 controls the closing of the fourth switch 41 to transmit first discharge matching confirmation information to the vehicle 100.

[0125] As a possible implementation manner, the device controller 40 controls the fourth switch 41 to switch between a closed state and an open state to send a preset pulse signal to the vehicle 100 .

[0126] As mentioned above, when vehicle 100 requires discharge, first branch 21 is switched from an off state to an on state, communicating with the charger to determine whether the charger supports AC V2G technology. The charger detects the voltage at the second control pilot terminal to determine the discharge requirement of vehicle 100. (Ignoring the effect of diode voltage drop, third detection point 40-1 and first detection point 30-1 are equipotential points.) When the charger is a charging station supporting AC V2G technology as provided in this application, the fourth branch is turned on, and a first discharge match confirmation message is sent to vehicle 100. In this case, the first discharge match confirmation message is voltage information.

[0127] Since the fourth branch 4 is connected to the third detection point 40-1 with a predetermined impedance in the on state, the loop impedance between the ground terminal of the charger and discharger, the fourth branch 4 and the device controller 40 changes, and the voltage of the third detection point 40-1 also changes. Since the first detection point 30-1 and the third detection point 40-1 on the vehicle side are equipotential points (ignoring the influence of the voltage drop of the diode 32), the vehicle controller 30 can also obtain the voltage change, that is, receive the first discharge matching confirmation information, and confirm that the charger and discharger 200 supports AC V2G technology.

[0128] As a possible implementation, refer to Figure 7The charger / discharger 200 further includes a fifth switch 43 and a fifth resistor 44. The device controller 40 includes a pulse power supply terminal and a constant voltage power supply terminal. The first selectable terminal of the fifth switch 43 can be connected to the pulse power supply terminal of the device controller 40, and the second selectable terminal of the fifth switch 43 can be connected to the constant voltage power supply terminal of the device controller 40. The common terminal of the fifth switch 43 is connected to the first terminal of the fifth resistor 44, and the second terminal of the fifth resistor 44 is connected to the third detection point 40-1. The pulse power supply terminal periodically emits high and low levels.

[0129] The pulse power supply can generate rectangular pulses, that is, it can generate periodic high and low voltage levels with large differences in amplitude. The constant voltage power supply can output a stable and continuous voltage. For example, in a practical application scenario, the pulse power supply is a pulse width modulation (PWM) output terminal. The voltage at the pulse power supply output is +12V to -12V, while the constant voltage power supply outputs a stable 12V voltage.

[0130] The fifth switch 43 can switch between the first and second selectable terminals, meaning that the fifth switch 43 can be connected to the pulse power supply terminal or the constant voltage power supply terminal. Specifically, when the vehicle 100 is connected to the charger / discharger 200, the fifth switch 43 switches from being connected to the constant voltage power supply terminal to being connected to the pulse power supply terminal.

[0131] As a possible implementation, refer to Figure 8 The charger / discharger 200 also includes a second AC charging / discharging interface 201 (hereinafter referred to as the power supply interface) and a protection circuit 5. The protection circuit 5 is connected to the power supply interface 201 and is also used to connect to the power grid 300. The power supply interface 201 is used to connect to the vehicle 100. The protection circuit 5 can detect the current difference between the neutral and live wires. Once it detects that the leakage current exceeds a set threshold, it will quickly cut off the power supply, thereby preventing electric shock accidents and the dangers of equipment damage and fire caused by leakage.

[0132] As a possible implementation, the protection circuit 5 includes a protector 51, which can be a leakage protector. A first AC contactor 52 and a second AC contactor 53 are also included between the protector 51 and the power supply interface. The first end of the protector 51 is used to connect to the power grid 300, the second end of the protector 51 is connected to the first end of the first AC contactor 52, and the second end of the first AC contactor 52 is connected to the power supply interface 201. The third end of the protector 51 is connected to the first end of the second AC contactor 53, and the second end of the second AC contactor 53 is connected to the power supply interface 201.

[0133] The protection circuit 5 is turned on, which means that the electricity of the grid 300 can be transmitted to the vehicle 100 through the charger and discharger 200, which corresponds to the charging of the vehicle in actual applications. The vehicle 100 can also supply power to the grid 300 through the charger and discharger 200, which corresponds to the discharging of the vehicle 100 in actual applications.

[0134] In some embodiments, for example, Figure 8 As shown, the charger / discharger 200 further includes a connection confirmation circuit 6. The connection confirmation circuit 6 is connected to the charger / discharger ground terminal and is also connected to the power supply interface 201. The connection confirmation circuit 200 is configured to have different impedances when the vehicle interface 101 and the power supply interface 201 are connected or disconnected.

[0135] As a possible implementation, the connection confirmation circuit 6 includes: a sixth resistor 61, a seventh resistor 62, and a sixth switch 63. A first end of the sixth resistor 61 is connected to the ground terminal of the charger / discharger, a first end of the sixth switch 63 is connected to the ground terminal of the charger / discharger, a second end of the sixth resistor 61 is connected to the second end of the sixth switch 63, a first end of the seventh resistor 62 is connected to the second end of the sixth switch 63, and a second end of the seventh resistor 62 is connected to the power supply interface 201.

[0136] When the sixth switch 63 is closed, the sixth resistor 61 is short-circuited, and the impedance in the connection confirmation circuit 6 is the resistance of the seventh resistor 62. When the sixth switch 63 is open, the impedance in the connection confirmation circuit 6 is the sum of the resistances of the sixth resistor 61 and the seventh resistor 62.

[0137] As a possible implementation, refer to Figure 8 The power supply interface further includes: a second connection confirmation terminal (pile end CC) and a second protective grounding terminal (pile end PE). The second connection confirmation terminal is connected to the second end of the seventh resistor 62. The second protective grounding terminal is connected to the grounding terminal of the charger / discharger.

[0138] As a possible implementation, refer to Figure 8 The power supply interface 201 further includes: a fourth AC power phase terminal (pile end L1), a fifth AC power phase terminal (pile end L2), a sixth AC power phase terminal (pile end L3), and a second AC power neutral terminal (pile end N). The fourth AC power phase terminal is connected to the second end of the first AC contactor 52, the fifth AC power phase terminal is connected to the first live wire connection terminal 51-4 of the protector 51, the sixth AC power phase terminal is connected to the second live wire connection terminal 51-5 of the protector 51, and the second AC power neutral terminal is connected to the second end of the second AC contactor 53.

[0139] It should be understood that the vehicle 100 and the charger / discharger 200 are connected via the vehicle interface 101 and the power supply interface 201, respectively. For example, the vehicle interface 101 is a socket on the vehicle, and the power supply interface 201 is a plug on the charging station. When the vehicle interface 101 and the power supply interface 201 are connected, it represents that the plug on the charging station is connected to the socket on the vehicle.

[0140] The present application also provides a charge and discharge control method, which is applied to the aforementioned vehicle, referring to Figure 1 The charge and discharge control method includes: controlling the first switch 211 to be in a closed state, and controlling the vehicle 100 to discharge according to the voltage of the first detection point 30 - 1 .

[0141] When the user has a need to discharge the vehicle 100, the vehicle controller 30 controls the first switch 211 to be in a closed state, that is, controls the first branch 21 to be turned on. The conduction of the first branch 21 will change the impedance of the vehicle-end loop, which is the loop formed between the vehicle controller 30, the first branch 21 and the vehicle ground terminal. This causes the voltage at the first control guide terminal to change. The charging pile can receive the voltage change. If the charging pile supports AC V2G technology, the charging pile will respond and the voltage will change again. If the charging pile cannot support AC V2G technology, the voltage will not change. Therefore, when the vehicle controller 30 confirms that the charging pile supports discharge based on the voltage of the first detection point, it controls the vehicle 100 to discharge. When the vehicle controller 30 confirms that the charging pile cannot support discharge based on the voltage of the first detection point 30-1, it controls the vehicle 100 to charge.

[0142] After the vehicle controller 30 confirms that the vehicle interface 101 of the vehicle 100 is tightly connected to the power supply interface 201 of the charger / discharger 200, the fifth switch 43 switches from the second selection end to the first selection end, that is, connects to the pulse power supply end. The vehicle controller 30 controls the first switch 211 to be opened and the second switch 221 to be closed. For example, the circuit equivalent diagram is as follows Figure 9 shown.

[0143] As a possible implementation, combining Figure 4 and Figure 8 The charge and discharge control method further includes: when the vehicle 100 is discharging, controlling the first switch 211 to be in a closed state and controlling the second switch 221 to be in an open state. When the vehicle 100 is charging, controlling the first switch 211 to be in an open state and controlling the second switch 221 to be in a closed state.

[0144] Reference Figure 8 and Figure 9, the voltage measured at the first detection point is the voltage divided by the fixed resistor 31 connected in parallel with the second resistor 222 and the fifth resistor 44. For example, when the first switch 11 and the second switch 12 are both in the off state, the voltage detected by the mobile terminal controller 30 at the first detection end is 9V, and the calculation formula is as follows:

[0145]

[0146] Where V1 and V2 represent the amplitude of the high level of the PWM wave measured at the first detection point and the third detection point, respectively. When the second switch 221 is closed, the voltage detected by the vehicle controller 30 at the first detection point 30-1 is 6V, and the calculation formula is as follows:

[0147]

[0148] When the third detection point of the device controller 40 detects a voltage of 6V, it means that the vehicle 100 issues a charge request.

[0149] When the vehicle 100 wants to discharge, the vehicle controller 30 controls the first switch 211 to be in a closed state. When the first switch 211 is in a closed state, the voltage detected by the mobile terminal controller 30 at the first detection end is not equal to 6V. The calculation formula is as follows:

[0150]

[0151] When the third detection point of the device controller 40 detects a voltage that is not equal to 6V, for example, 3V, it means that the vehicle 100 issues a discharge request.

[0152] As a possible implementation, combining Figure 4 and Figure 8 The charge and discharge control method further includes: when the vehicle 100 is discharging, controlling the second branch 22 to be in an off state, and controlling the first branch 21 to switch between an on state and an off state, so as to send the first communication information through the vehicle 100.

[0153] Before the car 100 is charged or discharged, the connection relationship between the car 100 and the charger / discharger 200 is first confirmed, that is, it is determined whether the connection between the car 100 and the charger / discharger 200 is tight.

[0154] In some embodiments, when the vehicle interface 101 of the vehicle 100 is tightly connected to the power supply interface 201 of the charger and discharger 200, the sixth switch 63 is switched from an open state to a closed state, the sixth resistor 61 is short-circuited, and the resistance received by the vehicle controller 30 at the second detection end 30-2 will decrease. At this time, the vehicle controller 30 confirms that the vehicle interface 101 of the vehicle 100 is tightly connected to the power supply interface 201 of the charger and discharger 200.

[0155] Because the third detection terminal is connected to the first detection point 30-1 of the vehicle controller 30 via the second control pilot signal terminal, the first control pilot signal terminal, and the diode 32, the voltage measured at the third detection point 30-1 is the same as the voltage measured by the vehicle controller 30 at the first detection point 30-1, ignoring the voltage drop across the diode. After confirming that the vehicle interface 101 of the vehicle 100 is tightly connected to the power supply interface 201 of the charger / discharger 200, the fifth switch 43 switches from the constant voltage power supply terminal to the pulse power supply terminal. When it is confirmed that both the vehicle 100 and the charger / discharger 200 are functioning properly, the first branch and the second branch assume different states depending on the charging and discharging requirements. For example, when the vehicle 100 requires charging, the first branch is turned on and the first switch 211 is closed. After the first switch 211 is closed, the first AC contactor 52 and the second AC contactor 53 switch from an open state to a closed state, completing preparations for charging. For another example, when the vehicle 100 has a discharge requirement, the second branch is turned on and the second switch 221 is closed. After the second switch 221 is closed, the first AC contactor 52 and the second AC contactor 53 are switched from the open state to the closed state, completing the preparation before discharge.

[0156] The charge-discharge control method provided in the embodiment of the present application controls the second branch 22 to be in an off state and controls the first branch 21 to switch between an on state and an off state when the charger 20 is discharging, so as to transmit first communication information through the vehicle 100. The principle is that the first branch 21 has different impedances in the on and off states. When the first branch 21 is in the on state, the first resistor 212 is connected between the vehicle ground terminal and the circuit containing the vehicle controller 30. When the first branch 21 is in the off state, the first resistor 212 is not connected between the vehicle ground terminal and the circuit containing the vehicle controller 30. Therefore, the device controller 40 of the charger 200 can, at the third detection point, measure different voltage values when the first branch 21 is in different states and associate the different voltage values with the binary digits 0 and 1, respectively, thereby enabling the vehicle 100 to communicate with the charging pile 200 during the discharge process. The so-called first communication information is the information transmitted from the vehicle 100 to the charger 200 based on the binary digit corresponding to the voltage amplitude.

[0157] In some embodiments, the first communication information includes a first confirmation message, a first fault message, and / or a first firmware message. The first confirmation message indicates the charge and discharge status of the vehicle. The first fault message indicates whether the vehicle is faulty. The first firmware message includes a vehicle identification number.

[0158] It should be understood that when the vehicle 100 sends the first communication information to the charger / discharger 200 , the charger / discharger 200 receives the first communication information through the device controller 40 .

[0159] As mentioned above, when the vehicle needs to charge, the second switch 221 is closed and the first switch 211 is open. When the vehicle needs to discharge, the first switch 211 is closed and the second switch 221 is open. Due to the different resistance values of the first resistor 212 and the second resistor 222, the voltages obtained by the device controller 40 at the third detection point 40-1 are also different. When the vehicle needs to discharge, the response from the charger / discharger 200 is also used to determine whether discharge is supported.

[0160] The charger / discharger 200 can actively send a preset pulse signal to the vehicle 100 to request charging, and can also respond to the first discharge matching confirmation information sent by the vehicle 100. For the vehicle side, there are also two corresponding situations. In some embodiments, when the vehicle 100 is discharging, before controlling the first switch 211 to be in a closed state, the charge and discharge control method further includes: receiving a pulse signal through the first detection point 30-1, and when the pulse signal received by the vehicle 100 is a preset pulse signal, controlling the first switch 211 to be in a closed state, and the vehicle 100 is discharged, wherein the amplitude of the preset pulse signal meets the preset amplitude.

[0161] In other embodiments, when the vehicle 100 is discharging, controlling the first switch 211 to be in a closed state further includes: after controlling the first switch 211 to be in a closed state, obtaining first discharge matching confirmation information within a preset time, and then the vehicle 100 starts discharging.

[0162] As a possible implementation, the charge-discharge control method further includes: receiving a pulse signal through the first detection point 30-1, the pulse signal including periodic high and low levels, wherein the high level is greater than a first preset voltage value, and the low level is less than or equal to the first preset voltage value. Exemplarily, the first preset voltage value is 0. When the vehicle 100 is discharging, controlling the first branch 21 to switch between an on state and an off state specifically includes: controlling the first branch 21 to switch between an on state and / or an off state while the high level persists.

[0163] When charging, the charger / discharger 200 transmits a pulse signal to the vehicle 100 via the third detection point. The pulse signal includes periodic high and low levels. The high level is greater than a second preset voltage value, and the low level is less than or equal to the second preset voltage value. Exemplarily, the second preset voltage value is 0. While the high level persists, the fourth branch 4 is controlled to switch between an on state and / or an off state to transmit the second communication information.

[0164] During the process of charging and discharging of the vehicle 100 with the power grid 300 via the charger / discharger 200, an information exchange process occurs. The vehicle 100 sends first communication information to the charger / discharger 200. The device controller 40 of the charger / discharger 200 receives the first communication information via the third detection point 40-1 and demodulates the information to obtain vehicle information, such as the charging and discharging status. The charger / discharger 200 also sends second communication information to the vehicle 100. The vehicle controller 30 of the vehicle 100 receives the second communication information via the first detection point 30-1 and demodulates the information to obtain information about the charger / discharger 200, such as the operating status of the charger / discharger 200.

[0165] However, in the embodiment provided herein, when the vehicle 100 is discharging, the first switch 211 is controlled to be in an open or closed state, and the second switch 221 is controlled to be in an open state, while the second communication information sent by the charger / discharger 200 is obtained. When the charger / discharger 200 is charging, a pulse signal is sent to the vehicle 100 via the third detection point 40-1. The pulse signal includes periodic high and low levels. During the high-level period, the fourth branch 4 is controlled to be in an open or closed state, and the first communication information sent by the vehicle 100 is obtained.

[0166] The above has mentioned how the vehicle 100 sends the first communication information, and the charger 200 sends the second communication information in a similar manner. Figure 8 The charge and discharge control method provided in the embodiment of the present application further includes: when the charger and discharger 200 is charging, controlling the fourth branch 4 to switch between the on state and the off state to send the second communication information through the charger and discharger 200.

[0167] By adjusting the conduction state of the third and fourth branches 4 in the embodiment of the present application, the impedance on the side connected to the vehicle can be changed. Specifically, by controlling the opening and closing of the third and fifth switches 41, the connection of the fourth resistor 42 to the circuit can be controlled, thereby affecting the voltages at the first detection endpoint 30-1 and the third detection point 40-1. When the fourth resistor 42 is connected to the circuit, the voltages measured at the first and third detection points 30-1 and 40-1 decrease. When the fourth resistor 42 is not connected to the circuit, the voltages measured at the first and third detection points 30-1 and 40-1 increase. Because the connection or non-connection of the fourth resistor 42 causes a voltage difference, different voltages are associated with the binary digits 0 and 1, for example, a higher voltage corresponds to the binary digit 1, and a lower voltage corresponds to the binary digit 0. After encoding, a binary code is obtained at the first detection point 30-1 by controlling the conduction state of the third and fourth branches 4. Since the first detection point 30-1 is connected to the vehicle 100, communication between the vehicle and the charging pile is achieved.

[0168] In some embodiments, the second communication information includes third confirmation information, second fault information, and / or second firmware information. The third confirmation information indicates the charge / discharge status of the charger / discharger. The second fault information indicates whether the charger / discharger is faulty. The second firmware information includes an identification number of the charger / discharger.

[0169] The following takes the example of the charger / discharger 200 sending the second communication information to the vehicle 100 as an example for detailed description:

[0170] After confirming that the charger and discharger 200 is tightly connected to the vehicle, the pulse power supply end (PWM end) is used as the power input. The duty cycle output by the PWM end represents the limit of the charging current in the existing charging protocol. For example, an 80% duty cycle means that the high level lasts for 80% of the time in a cycle, which corresponds to the maximum limit of the charging current. After the vehicle 100 receives the signal through the first detection point 30-1, the charger 20 adjusts the charging current.

[0171] On the basis of realizing the above-mentioned communication between the vehicle and the pile, by controlling the conduction state of the fourth branch 4 when the pulse power supply outputs a high level, the communication between the vehicle and the pile can be realized without affecting the duty cycle, and is compatible with the existing protocol. Figure 10 As shown. The original waveform output by the pulse power supply is as follows Figure 10 As shown, Figure 10 Four cycles T1, T2, T3, and T4 are shown in FIG. Figure 10 It can be seen that the pulse power supply outputs periodic high and low levels. Due to the influence of the diode, the reverse voltage output by the pulse power supply cannot be transmitted to the vehicle side. Therefore, the minimum amplitude of the voltage that the vehicle controller 30 can receive is 0V. The high level and the low level are relative. Figure 10 There are only two voltage amplitudes in the circuit, namely 9V and 0V. 9V is a high level and 0V is a low level. The proportion of the high level in a cycle is the duty cycle.

[0172] For example, Figure 11 shown. Figure 11 Four possible waveforms are shown in FIG. 1 , which all control the fourth branch 4 to switch between the on state and the off state when the pulse power supply outputs a high level. Similarly, due to the influence of the diode, the reverse voltage output by the pulse power supply cannot be transmitted to the vehicle side, so the minimum amplitude of the voltage that the vehicle controller 30 can receive is 0V. Figure 11 There are three voltage amplitudes, namely 9V, 3V and 0V.

[0173] Since the opening and closing of the fourth switch 41 causes the fourth resistor 42 to be connected to the circuit, thus causing a change in impedance, changes in the 9V and 3V voltages are generated. For example, the 9V voltage represents the opening of the fourth switch 41, and the 3V voltage represents the closing of the fourth switch 41. However, in terms of high and low levels, high and low levels are relative. 9V and 3V are both high levels relative to 0V.

[0174] By controlling the conduction state of the fourth branch 4 when a high level is output at the pulse power supply end, the proportion of the high level in the entire cycle does not change, that is, the duty cycle will not change with the change of the conduction state of the fourth branch 4, and it is always determined by the device controller 40, realizing communication between vehicles and piles on the basis of compatibility with existing protocols.

[0175] The switching between on and off of the fourth branch 4 is always performed during the period when the pulse power supply outputs a high level, but the present application does not limit the period required to transmit an eight-bit binary data. For example, Figure 11 As shown, transmitting an eight-bit binary data may correspond to 2 cycles, 4 cycles, or even 8 cycles.

[0176] Figure 11 The four figures from top to bottom are labeled a, b, c, and d. The data bits in these four figures represent information sent from the charger / discharger 200 to the vehicle 100. As a possible implementation, this is eight bits of data. In a, the data is 01100011; in b, it is 01011011; in c, it is 01111000; and in d, it is 01101100.

[0177] The eight bits of data in Figure a are transmitted in one cycle, namely, cycle T2. The eight bits of data in Figure b are transmitted in two cycles, namely, cycles T2 and T3. The eight bits of data in Figure c are transmitted in four cycles, namely, cycles T2, T3, T4, and T5. The eight bits of data in Figure d are transmitted in eight cycles, namely, cycles T2, T3, T4, T5, T6, T7, T8, and T9. The length of the data transmission cycle is related to the switching frequency of the fourth switch 41 during the high-level period. For example, the eight bits of data in Figure a are transmitted in one cycle, which means that the eight bits of data information is transmitted by the fourth switch 41 switching eight times during the high-level period of one cycle. For another example, the eight bits of data in Figure b are transmitted in two cycles, which means that the eight bits of data information is transmitted by the fourth switch 41 switching eight times during the high-level period of two cycles, which means that the fourth switch 41 switches four times during the high-level period of one cycle.

[0178] It should be understood that in order to ensure the accuracy of the information received by the car 100, at least one of the start bit, data bit, check bit and stop bit can be set for each data transmission. This application does not limit the setting method of the start bit, data bit, check bit and stop bit, which can be Figure 11 The size of one cycle shown in can also be sent as one data bit in one cycle.

[0179] Similarly, the device controller 40 can obtain the corresponding binary digit based on the voltage amplitude detected at the third detection point 40-1, thereby obtaining relatively complete data from the eight binary digits. For example, this data can reflect the discharge data of the vehicle 100, the status of the charger in the vehicle 100, and the ID number of the vehicle 100.

[0180] Since the fifth switch 43 will switch from the second selection end to the first selection end after the automobile 100 is tightly connected to the charger and discharger 200, that is, it will be connected to the pulse power supply end. Therefore, the vehicle controller 30 can receive the periodic high and low levels sent by the charger and discharger 200. As mentioned above, in the charging process, there is a mapping relationship between the duty cycle of the pulse power supply end and the limit of the charging current. In the discharging process, the duty cycle of the pulse power supply end also needs to have a mapping relationship with the limit of the discharge current. The charger and discharger 200 and the vehicle 100 provided by the embodiment of the present application can define the mapping relationship between the duty cycle and the limit of the discharge current on the basis of being compatible with the existing mapping relationship between the duty cycle and the limit of the charging current.

[0181] Reference Figure 8 It should be understood that when the first branch 21 includes the first switch 211 and the second branch 22 includes the second switch 221, controlling the first branch 21 to switch between an on state and an off state includes controlling the first switch 211 to switch between closed and / or open states. Controlling the second branch 22 to be in an off state includes controlling the second switch 221 to be in an open state. When the fourth branch 4 includes the fourth switch 41, controlling the fourth branch 4 to switch between an on state and / or an off state includes controlling the fourth switch 41 to switch between closed and / or open states to transmit the second communication information.

[0182] For example, when the first switch 212 is operated only once during the high level period of each cycle, that is, when the high level of each cycle defines only one binary number, 8-bit binary data requires eight cycles of pulse signals, and the first branch 21 corresponding to the high level of each cycle may be in the on state or the off state, corresponding to only one option, corresponding to "controlling the first branch 21 to switch between the on state and the off state, including: controlling the first switch 211 to switch between closed and open." When the first switch 211 is operated eight times during the high level period of each cycle, that is, when the high level of each cycle defines 8 binary numbers, an 8-bit binary data only requires one cycle of pulse signals, and the first branch 21 corresponding to the high level of this cycle may have both an on state and an off state, with two options, corresponding to "controlling the first branch 21 to switch between the on state and the off state, including: controlling the first switch 211 to switch between closed and open."

[0183] Because the CP line supports single-line bidirectional serial communication, this means that when the vehicle 100 sends information to the charger / discharger 200, the charger / discharger 200 can only receive information and cannot simultaneously send information from the charger / discharger side to the vehicle 100, thereby avoiding confusion. Therefore, the charge / discharge control method provided in this application also includes: when the charger is discharging, controlling the first branch 21 to be in an open state or a conducting state, that is, controlling the first switch 211 to be in an open state or a closed state, and controlling the second branch 22 to be in an open state, that is, controlling the second switch 222 to be in an open state, to obtain the second communication information sent by the charger / discharger.

[0184] Similarly, when the charger / discharger is charging, a pulse signal is sent to the vehicle 100 via the third detection point 40-1. The pulse signal includes periodic high and low levels. During the high level period, the fourth branch 4 is controlled to be in the disconnected state or the conductive state to obtain the first communication information sent by the vehicle 100.

[0185] When the fourth branch 4 is only operated once during the high level period of each cycle, that is, when the high level of each cycle defines only one binary number, 8-bit binary data requires eight cycles of pulse signals, and the fourth branch 4 corresponding to the high level of each cycle may be in the on state or the off state, corresponding to only one option, corresponding to "controlling the fourth branch 4 to switch between the on state and the off state." When the fourth branch 4 is operated eight times during the high level period of each cycle, that is, when the high level of each cycle defines 8 binary numbers, an 8-bit binary data only requires one cycle of pulse signals, and the fourth branch 4 corresponding to the high level of this cycle may be in both the on state and the off state, with two options, corresponding to "controlling the fourth branch 4 to switch between the on state and the off state."

[0186] As a possible implementation, refer to Figure 8 When the fourth branch includes the fourth switch 41 and the charger / discharger 200 is charging and not sending the second communication information, the fourth switch 41 is in a first state or a second state. The first state is one of normally closed and normally open, and the second state is the other of the two. For example, the first state is normally open, and the second state is normally closed.

[0187] As a possible implementation, when the charger / discharger 200 is charging and sending the second communication information, the fourth switch 41 is in the third state, which is switched between closed and open.

[0188] In some embodiments, when the fourth switch 41 switches from the first state to the second state, or vice versa, for at least a predetermined time, the charger / discharger transmits a second communication message, which is a second fault message. In this case, the speed at which the vehicle 100 receives the second fault message is greatly improved, thereby ensuring the safety of the vehicle 100.

[0189] When the charger and discharger 200 provided by the present application is connected to a conventional car 400, Figure 12 When the car 100 provided by this application is connected to the traditional stock pile 500, as shown in FIG. Figure 13 shown.

[0190] exist Figure 12 In the embodiment, the device controller 40 controls the on / off state of the fourth branch by opening and closing the fourth switch 41. The operation during the period when the pulse power supply outputs a high level can realize the communication from the charger 200 to the traditional car 400 without changing the duty cycle. Since the size of the duty cycle does not change, in this case, the size of the duty cycle can be mapped to the limit of the charge and discharge current, which is compatible with the existing protocol.

[0191] exist Figure 13 In the process, the vehicle controller 30 controls the on / off state of the first branch and the second branch by opening and closing the first switch 211 and the second switch 221, so that the traditional stock pile 500 can easily and accurately judge the charging and discharging process of the car 100 based on the voltage detected at the third detection point 40-1.

[0192] The present application also provides a control and guidance circuit, comprising a vehicle-side guidance circuit and a charging station-side guidance circuit. The vehicle-side guidance circuit includes a vehicle ground terminal, a vehicle controller, and a first switch. The first end of the first switch is connected to the vehicle ground terminal, and the second end of the first switch is connected to the vehicle controller. The charging station-side guidance circuit includes a charger-discharger ground terminal, a device controller, and a fourth switch. The first end of the fourth switch is connected to the charger-discharger ground terminal, and the second end of the fourth switch is connected to the device controller.

[0193] It should be noted that the control pilot circuit is the circuit after the aforementioned car is connected to the charger and discharger, the vehicle-end pilot circuit is the circuit possessed by the aforementioned car, and the pile-end pilot circuit is the circuit possessed by the charger and discharger.

[0194] As a possible implementation, the vehicle controller includes a first detection point, and the second end of the first switch is connected to the first detection point; the device controller includes a third detection point, and the second end of the fourth switch is connected to the third detection point.

[0195] As a possible implementation, the vehicle-end steering circuit further includes a first control steering terminal, and the pile-end steering circuit further includes a second control steering terminal; the second end of the first switch is connected to the first control steering terminal, and the second end of the fourth switch is connected to the second control steering terminal.

[0196] As one possible implementation, the vehicle controller detects the voltage of the first control guide terminal via a first detection point. The vehicle controller is configured to control vehicle discharge based on the voltage at the first detection point when the first switch is closed. The device controller is configured to control the closing of a fourth switch to transmit a first discharge matching confirmation message to the vehicle.

[0197] As a possible implementation, the vehicle-side steering circuit further includes a first resistor. A first end of the first resistor is connected to a second end of the first switch, and a second end of the first resistor is connected to the first control steering terminal and the first detection point. The first resistor and the first switch are connected in series to form a first branch.

[0198] As a possible implementation, the vehicle-side guidance circuit further includes a second switch and a second resistor. A first end of the second switch is connected to the vehicle ground terminal, a second end of the first switch is connected to a first end of a second resistor, a second end of the second resistor is connected to the first control guidance terminal and the first detection point, and the second switch and the second resistor are connected in series to form a second branch. The first and second resistors have different resistance values.

[0199] As a possible implementation, the vehicle-end steering circuit further includes a resistance unit, a first end of the resistance unit is connected to the vehicle ground terminal, and a second end of the resistance unit is connected to the first detection point of the vehicle controller.

[0200] As a possible implementation, the pile end steering circuit also includes a fourth resistor, the first end of the fourth resistor is connected to the second end of the fourth switch, the second end of the fourth resistor is connected to the second control steering terminal and the third detection point, and the fourth switch and the fourth resistor are connected in series to form a fourth branch.

[0201] As a possible implementation, the vehicle-end steering circuit further includes a diode, wherein the cathode of the diode is connected to the first detection point, and the anode of the diode is connected to the first control steering terminal.

[0202] As a possible implementation, the pile-end steering circuit further includes a fifth switch and a fifth resistor. The device controller includes a pulse power supply terminal and a constant voltage power supply terminal. The first selectable terminal of the fifth switch can be connected to the pulse power supply terminal of the device controller, and the second selectable terminal of the fifth switch can be connected to the constant voltage power supply terminal of the device controller. The common terminal of the fourth switch is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is connected to the third detection point. The pulse power supply terminal periodically emits high and low levels.

[0203] Similarly, an embodiment of the present application also provides a charge and discharge control method, which is applied to the control pilot circuit as described above. The charge and discharge control method corresponds to the vehicle-end pilot circuit and the pile-end pilot circuit, that is, to the aforementioned vehicle side and the charger side.

[0204] The charge and discharge control method includes: a vehicle controller detects the voltage of a first control guide terminal through a first detection point, controls a first switch to be in a closed state, and controls the vehicle to discharge to a charger and discharger according to the voltage of the first detection point to charge the charger and discharger.

[0205] As a possible implementation, before charging the charger / discharger, the charge / discharge control method further includes: the vehicle controller controlling the first switch to be in a closed state to transmit a second discharge match confirmation message to the charger / discharger. Upon receiving the second discharge match confirmation message at the third detection point, the device controller controlling the fourth branch to be in a conductive state to transmit the first discharge match confirmation message to the vehicle via the third detection point. After the first switch is closed, if the vehicle controller receives the first discharge match confirmation message within a preset time, the vehicle begins discharging.

[0206] As a possible implementation, the charge-discharge control method further includes: when the vehicle is discharging, controlling the second branch to be in an off state, controlling the first branch to switch between an on state and an off state, so as to transmit first communication information via the vehicle; and controlling the fourth branch to switch between an on state and an off state, so as to transmit second communication information via the charger / discharger.

[0207] As one possible implementation, when the vehicle is discharging, a pulse signal is sent to the vehicle via the third detection point. The pulse signal includes periodic high and low levels. During the high-level period, the fourth branch is controlled to be in an open or closed state to obtain the first communication information sent by the vehicle. The first switch is controlled to be in an open or closed state to obtain the second communication information sent by the charger / discharger.

[0208] As a possible implementation, the first communication information includes first confirmation information, first fault information, and / or first firmware information. The first confirmation information indicates the vehicle's charge and discharge status. The first fault information indicates whether the vehicle is faulty. The first firmware information includes a vehicle identification number. The second communication information includes third confirmation information, second fault information, and / or second firmware information. The third confirmation information indicates the charge and discharge status of the charger / discharger. The second fault information indicates whether the charger / discharger is faulty. The second firmware information includes the charger / discharger's identification number.

[0209] As a possible implementation, controlling the first branch to switch between an on state and an off state specifically includes: controlling the first branch to switch between an on state and / or an off state while the high level persists. Controlling the fourth branch to switch between an on state and an off state specifically includes: controlling the fourth branch to switch between an on state and / or an off state while the high level persists.

[0210] As a possible implementation method, before charging the charger and discharger, the charge and discharge control method also includes: controlling the four branches to switch between the on state and / or the off state to send a preset pulse signal to the vehicle, and when the pulse signal received by the vehicle is the preset pulse signal, controlling the first switch to be in a closed state and the vehicle discharges, wherein the amplitude of the preset pulse signal meets the preset amplitude.

[0211] As a possible implementation, when the first branch includes a first switch, the second branch includes a second switch, and the fourth branch includes a fourth switch, controlling the first branch to switch between an on state and an off state includes: controlling the first switch to switch between closed and / or open. Controlling the second branch to be in an open state includes: controlling the second switch to be in an open state. Controlling the fourth branch to switch between an on state and / or an off state includes: controlling the fourth switch to switch between closed and / or open.

[0212] Since the above circuit and method have been described in detail above, they will not be repeated here.

[0213] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A vehicle, characterized in that: The vehicle includes a vehicle ground terminal, a vehicle controller, and a first switch; A first end of the first switch is connected to the vehicle ground terminal, and a second end of the first switch is connected to the vehicle controller; The vehicle controller is used to control the vehicle to discharge when the first switch is in a closed state.

2. The vehicle according to claim 1, characterized in that The vehicle controller includes a first detection point, the second end of the first switch is connected to the first detection point, and the vehicle controller controls the vehicle to discharge according to the voltage of the first detection point.

3. The vehicle according to claim 2, characterized in that The vehicle further includes a first control guide terminal; The second end of the first switch is also connected to the first control guide terminal, and the vehicle controller detects the voltage of the first control guide terminal through the first detection point.

4. The vehicle according to claim 3, characterized in that The vehicle further includes a first resistor; The first end of the first resistor is connected to the second end of the first switch, the second end of the first resistor is connected to the first control guide terminal and the first detection point, and the first resistor and the first switch are connected in series to form a first branch.

5. The vehicle according to claim 4, characterized in that The vehicle further includes a second switch and a second resistor; A first end of the second switch is connected to the vehicle ground terminal, a second end of the second switch is connected to a first end of the second resistor, a second end of the second resistor is connected to the first control guide terminal and the first detection point, and the second switch and the second resistor are connected in series to form a second branch; The first resistor and the second resistor have different resistance values.

6. The vehicle according to claim 4, characterized in that The vehicle further includes a third switch and a third resistor; A first end of the third switch is connected to the second end of the first resistor, a second end of the third switch is connected to the first control guide terminal and the first detection point, a first end of the third resistor is connected to the second end of the first resistor, a second end of the third resistor is connected to the first control guide terminal and the first detection point, and the third switch and the third resistor are connected in parallel to form a third branch.

7. The vehicle according to claim 5, characterized in that The vehicle controller is used to control the vehicle to discharge according to the voltage of the first detection point when the second switch is in an open state and the first switch is in a closed state.

8. The vehicle according to claim 5, characterized in that The vehicle controller is further configured to control charging of the vehicle according to the voltage at the first detection point when the first switch is in an open state and the second switch is in a closed state.

9. The vehicle according to claim 6, characterized in that The vehicle controller is configured to control the vehicle to discharge according to the voltage at the first detection point when the first switch is in a closed state and the third switch is in a closed state; Alternatively, when the first switch is in a closed state and the third switch is in an open state, the vehicle is controlled to discharge according to the voltage at the first detection point.

10. The vehicle according to claim 6, characterized in that The vehicle controller is used to control the charging of the vehicle according to the voltage of the first detection point when the first switch is in a closed state and the third switch is in a closed state; or to control the charging of the vehicle according to the voltage of the first detection point when the first switch is in a closed state and the third switch is in an open state.

11. The vehicle according to any one of claims 1 to 10, characterized in that: The vehicle further includes a resistance unit, a first end of the resistance unit is connected to the vehicle ground terminal, and a second end of the resistance unit is connected to the vehicle controller.

12. The vehicle according to any one of claims 3 to 10, characterized in that: The vehicle further includes a diode; The cathode of the diode is connected to the first detection point, and the anode of the diode is connected to the first control guiding terminal.

13. The vehicle according to any one of claims 5 to 10, characterized in that: The vehicle further includes a first AC charging and discharging interface and / or a charger, wherein the charger is connected to the charger via the first AC charging and discharging interface, and the charger is connected to the vehicle controller via the first branch.

14. The vehicle according to claim 13, characterized in that The charger is also connected to the vehicle controller via the second branch.

15. A charge and discharge control method, applied to a vehicle, characterized in that: The charge and discharge control method includes: controlling a first switch to be in a closed state to control the vehicle to discharge.

16. The charge and discharge control method according to claim 15, characterized in that: In the case where the vehicle controller includes a first detection point, controlling the first switch to be in a closed state and controlling the vehicle to discharge includes: controlling the first switch to be in a closed state, and discharging the vehicle according to the voltage of the first detection point.

17. The charge and discharge control method according to claim 15, characterized in that: In the case where the switch circuit includes a first branch and a second branch, the charge and discharge control method includes: when the vehicle is discharging, controlling the first switch to be in a closed state and controlling the second switch to be in an open state.

18. The charge and discharge control method according to claim 15, wherein: In the case where the switch circuit includes a first branch and a second branch, the charge and discharge control method includes: when the vehicle is charging, controlling the first switch to be in an open state and controlling the second switch to be in a closed state.

19. The charge and discharge control method according to claim 16, wherein: The charge and discharge control method further includes: When the vehicle is discharged, the second branch is controlled to be in an off state, and the first branch is controlled to switch between an on state and an off state, so as to send first communication information through the vehicle.

20. The charge and discharge control method according to claim 19, wherein: The first communication information includes first confirmation information, first fault information and / or first firmware information; Among them, the first confirmation information indicates the charging and discharging status of the vehicle; the first fault information indicates whether the vehicle is faulty; and the first firmware information includes a vehicle identification number.

21. The charge and discharge control method according to claim 16, wherein: In the case of discharging the vehicle, before controlling the first switch to be in a closed state, the charge and discharge control method further includes: A pulse signal is received through the first detection point. When the pulse signal received by the vehicle is a preset pulse signal, the first switch is controlled to be in a closed state, and the vehicle discharges.

22. The charge and discharge control method according to claim 21, wherein: The amplitude of the preset pulse signal meets the preset amplitude.

23. The charge and discharge control method according to claim 16, wherein: When the vehicle is discharging, controlling the first switch to be in a closed state further includes: After the first switch is controlled to be in a closed state, the vehicle starts discharging if first discharge matching confirmation information is obtained within a preset time.

24. The charge and discharge control method according to claim 19, wherein: The charge and discharge control method further includes: receiving a pulse signal through the first detection point, the pulse signal including a periodic high level and a low level, wherein the high level is greater than a first preset voltage value, and the low level is less than or equal to the first preset voltage value; When the vehicle is discharging, controlling the first branch to switch between an on state and an off state specifically includes: controlling the first branch to switch between the on state and / or the off state during a period when the high level persists.

25. The charge and discharge control method according to claim 24, wherein: When the first branch includes a first switch and the second branch includes a second switch; The controlling the first branch to switch between an on state and an off state includes: controlling the first switch to switch between closed and / or open; The controlling the second branch to be in an open state includes: controlling the second switch to be in an open state.

26. The charge and discharge control method according to any one of claims 17 to 25, characterized in that: The charge and discharge control method further includes: During the discharging process of the vehicle, second communication information sent by the charger and discharger is obtained, wherein the vehicle is the vehicle according to any one of claims 1 to 14.

27. The charge and discharge control method according to claim 26, wherein: When the vehicle is discharging, the first switch is controlled to be in an open state or a closed state, and during the period when the second switch is controlled to be in an open state, second communication information sent by the charger and discharger is obtained.

28. The charge and discharge control method according to claim 26, wherein: The second communication information includes third confirmation information, second fault information and / or second firmware information; The third confirmation information indicates the charging and discharging status of the charger and discharger; the second fault information indicates whether the charger and discharger is faulty; and the second firmware information includes an identification number of the charger and discharger.

29. A charging and discharging machine, characterized in that: The charger / discharger includes a charger / discharger grounding terminal, a device controller, and a fourth switch; A first end of the fourth switch is connected to the ground terminal of the charger / discharger, and a second end of the fourth switch is connected to the device controller; The device controller is configured to control the closing of the fourth switch to send first discharge matching confirmation information to the vehicle.

30. The charging and discharging machine according to claim 29, characterized in that: The device controller includes a third detection point, and the second end of the fourth switch is connected to the third detection point.

31. The charging and discharging machine according to claim 30, characterized in that: The charger and discharger further includes a second control guide terminal, and the second end of the fourth switch is connected to the second control guide terminal.

32. The charging and discharging machine according to claim 30, characterized in that: The device controller detects the voltage of the second control guide terminal through the third detection point; and / or the device controller is used to determine whether the vehicle supports vehicle-to-grid discharge based on the voltage of the second control guide terminal, and if the vehicle supports vehicle-to-grid discharge, control the closing of the fourth switch to send first discharge matching confirmation information to the vehicle.

33. The charging and discharging machine according to claim 30, characterized in that: The device controller controls the fourth switch to switch between a closed state and an open state to send a preset pulse signal to the vehicle.

34. The charging and discharging machine according to claim 30, characterized in that: The charger and discharger also includes a fourth resistor, a first end of the fourth resistor is connected to the second end of the fourth switch, a second end of the fourth resistor is connected to the second control guide terminal and the third detection point, and the fourth switch and the fourth resistor are connected in series to form the fourth branch.

35. The charging and discharging machine according to claim 30, characterized in that: The charger and discharger further includes a fifth switch and a fifth resistor; The device controller includes a pulse power supply terminal and a constant voltage power supply terminal; The first selection end of the fifth switch can be connected to the pulse power supply end of the device controller, the second selection end of the fifth switch can be connected to the constant voltage power supply end of the device controller, the common end of the fifth switch is connected to the first end of the fifth resistor, and the second end of the fifth resistor is connected to the third detection point; The pulse power supply terminal sends out periodic high and low levels.

36. The charging and discharging machine according to any one of claims 29 to 35, characterized in that: The charger and discharger further includes a second AC charging and discharging interface.

37. A charge and discharge control method, characterized in that: Applied to a charging and discharging machine, the charging and discharging control method includes: controlling the closing of a fourth switch to send first discharge matching confirmation information to a vehicle.

38. The charge and discharge control method according to claim 37, wherein: The charge and discharge control method further includes: when the charger and discharger is charging, controlling the fourth branch to switch between an on state and an off state, so as to send second communication information through the charger and discharger.

39. The charge and discharge control method according to claim 38, wherein: The second communication information includes third confirmation information, second fault information and / or second firmware information; The third confirmation information indicates the charging and discharging status of the charger and discharger; the second fault information indicates whether the charger and discharger is faulty; and the second firmware information includes an identification number of the charger and discharger.

40. The charge and discharge control method according to claim 37, wherein: The charge and discharge control method further includes: when the third detection point receives second discharge matching confirmation information, controlling the fourth branch to be in a conductive state to send first discharge matching confirmation information to the vehicle through the third detection point.

41. The charge and discharge control method according to claim 37, wherein: When the charger and discharger is charging, a pulse signal is sent to the vehicle through the third detection point, wherein the pulse signal includes a periodic high level and a low level; the high level is greater than a second preset voltage value, and the low level is less than or equal to the second preset voltage value; During the duration of the high level, the fourth branch is controlled to switch between an on state and / or an off state to transmit the second communication information.

42. The charge and discharge control method according to claim 41, wherein: When the fourth branch includes a fourth switch; Controlling the fourth branch to switch between an on state and / or an off state includes: controlling the fourth switch to switch between closed and / or open to transmit the second communication information.

43. The charge and discharge control method according to claim 37, wherein: In the case where the fourth branch includes a fourth switch and the charger / discharger is charging and does not send the second communication information, The fourth switch is in a first state or a second state, the first state is one of normally closed and normally open, and the second state is the other of normally closed and normally open.

44. The charge and discharge control method according to claim 43, wherein: When the charger and discharger is charging and sending the second communication information, the fourth switch is in a third state, which is switched between closed and open.

45. The charge and discharge control method according to claim 43, wherein: When the fourth switch is switched from the first state to the second state or from the second state to the first state and lasts for at least a preset time, the charger and discharger sends second communication information, where the second communication information is second fault information.

46. The charge and discharge control method according to claim 40, wherein: When the fourth branch includes a fourth switch; Controlling the fourth branch to be in a conducting state includes: controlling the fourth switch to be in a closed state, and sending first discharge matching confirmation information to the vehicle through the third detection point.

47. The charge and discharge control method according to claim 37, wherein: The charge and discharge control method further includes: acquiring first communication information sent by the vehicle.

48. The charge and discharge control method according to claim 47, characterized in that: When the charger and discharger is charging, a pulse signal is sent to the vehicle through the third detection point, wherein the pulse signal includes a periodic high level and a low level; During the duration of the high level, the fourth branch is controlled to be in an open state or an open state to obtain the first communication information sent by the vehicle.

49. The charge and discharge control method according to any one of claims 37 to 48, characterized in that: The charge and discharge control method further includes: controlling the fourth branch in the charger and discharger to switch between an on state and / or an off state to send a preset pulse signal to the vehicle, wherein the amplitude of the preset pulse signal satisfies a preset amplitude; The charging and discharging machine is the charging and discharging machine according to any one of claims 29 to 36.

50. A control steering circuit, characterized in that: include: A vehicle-end pilot circuit, the vehicle-end pilot circuit comprising a vehicle ground terminal, a vehicle controller, and a first switch; a first end of the first switch is connected to the vehicle ground terminal, and a second end of the first switch is connected to the vehicle controller; The pile end steering circuit includes a charger and discharger grounding terminal, a device controller, and a fourth switch; a first end of the fourth switch is connected to the charger and discharger grounding terminal, and a second end of the fourth switch is connected to the device controller.

51. The control steering circuit according to claim 50, characterized in that: The vehicle controller includes a first detection point, and the second end of the first switch is connected to the first detection point; The device controller includes a third detection point, and the second end of the fourth switch is connected to the third detection point.

52. The control steering circuit according to claim 51, characterized in that: The vehicle-end guiding circuit further includes a first control guiding terminal, and the pile-end guiding circuit further includes a second control guiding terminal; The second end of the first switch is connected to the first control guiding terminal, and the second end of the fourth switch is connected to the second control guiding terminal.

53. The control steering circuit according to claim 52, characterized in that: The vehicle controller detects the voltage of the first control guide terminal through the first detection point; the vehicle controller is used to control the discharge of the vehicle according to the voltage of the first detection point when the first switch is in a closed state; the device controller is used to control the closing of the fourth switch to send a first discharge matching confirmation message to the vehicle.

54. The control steering circuit according to claim 52, characterized in that: The vehicle-end steering circuit further includes a first resistor; The first end of the first resistor is connected to the second end of the first switch, the second end of the first resistor is connected to the first control guide terminal and the first detection point, and the first resistor and the first switch are connected in series to form a first branch.

55. The control steering circuit according to claim 54, characterized in that: The vehicle-end steering circuit further includes a second switch and a second resistor; A first end of the second switch is connected to the vehicle ground terminal, a second end of the first switch is connected to a first end of the second resistor, a second end of the second resistor is connected to the first control guide terminal and the first detection point, and the second switch and the second resistor are connected in series to form a second branch; The first resistor and the second resistor have different resistance values.

56. The control steering circuit according to claim 55, characterized in that: The pile end steering circuit also includes a fourth resistor, a first end of the fourth resistor is connected to the second end of the fourth switch, a second end of the fourth resistor is connected to the second control steering terminal and the third detection point, and the fourth switch and the fourth resistor are connected in series to form the fourth branch.

57. The control steering circuit according to any one of claims 52 to 56, characterized in that: The vehicle-end steering circuit further includes a diode; The cathode of the diode is connected to the first detection point, and the anode of the diode is connected to the first control guiding terminal.

58. The control steering circuit according to any one of claims 52 to 56, characterized in that: The pile end steering circuit further includes a fifth switch and a fifth resistor; the device controller includes a pulse power supply terminal and a constant voltage power supply terminal; The first selection end of the fifth switch can be connected to the pulse power supply end of the device controller, the second selection end of the fifth switch can be connected to the constant voltage power supply end of the device controller, the common end of the fourth switch is connected to the first end of the fifth resistor, and the second end of the fifth resistor is connected to the third detection point; The pulse power supply terminal sends out periodic high and low levels.

59. A charge and discharge control method, applied to control a steering circuit, characterized in that: The charge and discharge control method includes: controlling the first switch to be in a closed state, and controlling the vehicle to discharge, so as to charge the charger and discharger.

60. The charge and discharge control method according to claim 59, wherein: In the case where the vehicle controller includes a first detection point, the first switch is in a closed state, and the vehicle is controlled to discharge, including the vehicle controller detecting the voltage of the first control guide terminal through the first detection point, and controlling the first switch to be in a closed state, and controlling the vehicle to discharge to the charger and discharger according to the voltage of the first detection point.

61. The charge and discharge control method according to claim 60, characterized in that: Before charging the charger and discharger, the charge and discharge control method further includes: The vehicle controller controls the first switch to be in a closed state, and sends a second discharge matching confirmation message to the charger / discharger; when the second discharge matching confirmation message is received at the third detection point, the device controller controls the fourth branch to be in a conducting state, so as to send the first discharge matching confirmation message to the vehicle through the third detection point; After the first switch is in a closed state, the vehicle controller obtains first discharge matching confirmation information within a preset time, and then the vehicle starts discharging.

62. The charge and discharge control method according to claim 60, characterized in that: The charge and discharge control method further includes: when the vehicle is discharging, controlling the second branch to be in an off state, controlling the first branch to switch between an on state and an off state, so as to send first communication information through the vehicle; and controlling the fourth branch to switch between an on state and an off state, so as to send second communication information through the charger and discharger.

63. The charge and discharge control method according to claim 62, characterized in that: When the vehicle is discharged, a pulse signal is sent to the vehicle through the third detection point, wherein the pulse signal includes a periodic high level and a low level; During the duration of the high level, controlling the fourth branch to be in an open state or an open state, and obtaining the first communication information sent by the vehicle; The first switch is controlled to be in an open state or a closed state, and second communication information sent by the charger and discharger is obtained.

64. The charge and discharge control method according to claim 62 or 63, characterized in that: The first communication information includes first confirmation information, first fault information and / or first firmware information; Wherein, the first confirmation information indicates the charging and discharging status of the vehicle; the first fault information indicates whether the vehicle has a fault; the first firmware information includes a vehicle identification number; The second communication information includes third confirmation information, second fault information and / or second firmware information; The third confirmation information indicates the charging and discharging status of the charger and discharger; the second fault information indicates whether the charger and discharger is faulty; and the second firmware information includes an identification number of the charger and discharger.

65. The charge and discharge control method according to claim 62, wherein: Controlling the first branch to switch between the on state and the off state specifically includes: controlling the first branch to switch between the on state and / or the off state during the period when the high level persists; Controlling the fourth branch to switch between the on state and the off state specifically includes: controlling the fourth branch to switch between the on state and / or the off state during the duration of the high level.

66. The charge and discharge control method according to claim 60, characterized in that: Before charging the charger and discharger, the charge and discharge control method further includes: The four branches are controlled to switch between an on state and / or an off state to send a preset pulse signal to the vehicle. When the pulse signal received by the vehicle is a preset pulse signal, the first switch is controlled to be in a closed state and the vehicle is discharged, wherein the amplitude of the preset pulse signal meets the preset amplitude.

67. The charge and discharge control method according to claim 65 or 66, characterized in that: When the first branch includes a first switch, the second branch includes a second switch, and the fourth branch includes a fourth switch; The controlling the first branch to switch between an on state and an off state includes: controlling the first switch to switch between closed and / or open; The controlling the second branch to be in an open state includes: controlling the second switch to be in an open state; The controlling the fourth branch to switch between an on state and / or an off state includes: controlling the fourth switch to switch between a closed state and / or an open state.

68. The charge and discharge control method according to claim 59, wherein: The charge and discharge control method is applied to a control steering circuit, and the control steering circuit is the control steering circuit according to any one of claims 50 to 58.

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