Adapter, charging and discharging connection device and charging and discharging system

Abstract

The invention discloses an adapter, a charging and discharging connection device and a charging and discharging system, and belongs to the technical field of vehicles. The first end of the adapter is used for being connected with the first end of a mode 3 connection mode B alternating current charging line, the second end of the mode 3 connection mode B alternating current charging line is used for being connected with a charging interface of a charging vehicle, the second end of the adapter is used for being connected with a discharging interface of a discharging vehicle, and the adapter comprises a control module. The control module is used for being connected with the charging interface through a mode 3 connection mode B alternating current charging line and is configured to send a current adjusting signal to the charging interface in the process that the charging vehicle is charged by the discharging vehicle, so that the charging vehicle responds to the current adjusting signal to gradually adjust the charging current of the charging vehicle. Therefore, the discharging current of the discharging vehicle is matched with the charging current of the charging vehicle, a common electric vehicle can realize a mutual charging function without hardware modification, and the universality of the charging function is remarkably improved.

Description

Technical Field

[0001] This application belongs to the technical field of vehicles, and particularly relates to an adapter, a charging and discharging connection device, and a charging and discharging system. Background Art

[0002] Currently, electric vehicle charging mainly adopts Mode 3 connection method B, and the charging process is completed by connecting to an AC charging pile. At the same time, most electric vehicles on the market only support the vehicle-to-load (V2L) power supply function and do not yet have the direct vehicle-to-vehicle (V2V) charging ability.

[0003] In the related art, if vehicle-to-vehicle charging is to be achieved, it is necessary to meet the conditions that the two vehicles have the same configuration and both have the V2V function, and it is completed with the charging equipment equipped with each vehicle, and the universality is poor. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides an adapter, a charging and discharging connection device, and a charging and discharging system, enabling ordinary electric vehicles to achieve the mutual charging function without hardware modification, and significantly improving the universality of the charging function.

[0005] In a first aspect, this application provides an adapter. The first end of the adapter is used to connect the first end of the Mode 3 connection method B AC charging cable. The second end of the Mode 3 connection method B AC charging cable is used to connect the charging interface of the charging vehicle. The second end of the adapter is used to connect the discharging interface of the discharging vehicle. The adapter includes:

[0006] A control module, configured to connect to the charging interface through the Mode 3 connection method B AC charging cable, and configured to send a current adjustment signal to the charging interface during the process of the discharging vehicle charging the charging vehicle, so that the charging vehicle responds to the current adjustment signal and gradually adjusts the charging current of the charging vehicle, so that the discharging current of the discharging vehicle matches the charging current of the charging vehicle.

[0007] According to an embodiment of this application, the control module includes:

[0008] A control pilot circuit, which is used to connect to the control pilot terminal of the charging vehicle through the Mode 3 connection method B AC charging cable;

[0009] A main control circuit, connected to the control pilot circuit, and configured to drive the control pilot circuit to send a control pilot signal with an initial duty cycle to the control pilot terminal of the charging vehicle when the discharging vehicle starts to charge the charging vehicle, and gradually increase the duty cycle until the discharging current matches the charging current.

[0010] According to an embodiment of the present application, the adapter has a power supply wire. The first end of the power supply wire is used to connect to a charging interface through a Mode 3 connection Type B AC charging cable, and the second end of the power supply wire is used to connect to a discharge interface. The control module further includes:

[0011] A power conversion circuit, the input end of the power conversion circuit is connected to the power supply wire, and the output end of the power conversion circuit is electrically connected to the power supply end of the main control circuit. The power conversion circuit is configured to convert the electrical energy of the power supply wire into the rated operating voltage of the main control circuit.

[0012] According to an embodiment of the present application, the control module further includes:

[0013] A voltage detection circuit, the voltage detection circuit is connected to the control pilot circuit and is configured to detect the voltage at the output end of the control pilot circuit;

[0014] The main control circuit is connected to the voltage detection circuit and is configured to determine the connection status of the charging vehicle according to the voltage at the output end of the control pilot circuit.

[0015] According to an embodiment of the present application, the adapter includes:

[0016] A first adapter member for connecting the first end of a Mode 3 connection Type B AC charging cable, wherein the second end of the Mode 3 connection Type B AC charging cable is used to connect to the charging interface of the charging vehicle;

[0017] A second adapter member, connected to the first adapter member, and the second adapter member is used to connect to the discharge interface.

[0018] According to an embodiment of the present application, the adapter has a connection confirmation signal line. The first end of the connection confirmation signal line is used to connect to the first connection confirmation terminal of the Mode 3 connection Type B AC charging cable, and the second end of the connection confirmation signal line is used to connect to the connection confirmation terminal of the discharge vehicle. The first adapter member includes:

[0019] A first resistor, the first end of the first resistor is used to connect to the body ground of the discharge vehicle and is used to connect to the body ground of the charging vehicle through the Mode 3 connection Type B AC charging cable;

[0020] A first switch, the first end of the first switch is connected to the second end of the second resistor, and the second end of the first switch is connected to the connection confirmation signal line.

[0021] According to an embodiment of the present application, the first switch is a normally closed trigger switch, and the first switch is configured to switch from a closed state to an open state when the first adapter member is completely connected to the Mode 3 connection Type B AC charging cable.

[0022] In a second aspect, the present application provides a charging and discharging connection device, comprising: a Mode 3 connection method B AC charging cable and the aforementioned adapter; wherein, the first end of the adapter is connected to the first end of the Mode 3 connection method B AC charging cable, the second end of the Mode 3 connection method B AC charging cable is used to connect to the charging interface of the charging vehicle, and the second adapter in the adapter is used to connect to the discharging interface of the discharging vehicle.

[0023] According to an embodiment of the present application, the Mode 3 connection method B AC charging cable comprises:

[0024] A first connector, connected to the first end of the adapter;

[0025] A second connector, connected to the first connector through a connection cable, and the second connector comprises:

[0026] A second resistor, the first end of the second resistor is used to connect to the body ground of the charging vehicle, and the second end of the second resistor is used to connect to the connection confirmation terminal of the charging vehicle;

[0027] A third resistor, the first end of the third resistor is used to connect to the body ground of the discharging vehicle through the adapter, and the second end of the third resistor is connected to the connection confirmation signal line in the adapter.

[0028] According to an embodiment of the present application, the second connector further comprises:

[0029] A second switch, the first end of the second switch is connected to the first end of the third resistor;

[0030] A fourth resistor, the first end of the fourth resistor is connected to the second end of the second switch, and the second end of the fourth resistor is connected to the second end of the fourth resistor.

[0031] According to an embodiment of the present application, the second switch is a normally open trigger switch, and the second switch is configured to switch from an open state to a closed state when the second connector is connected to the charging interface of the charging vehicle.

[0032] In a third aspect, the present application provides a charging and discharging system, comprising: a charging vehicle, a discharging vehicle, and the aforementioned charging and discharging connection device, the charging vehicle is connected to the Mode 3 connection method B AC charging cable in the charging and discharging connection device, and the discharging vehicle is connected to the adapter in the charging and discharging connection device.

[0033] For the adapter, the charging and discharging connection device and the charging and discharging system according to multiple embodiments of the present application, by reusing the Mode 3 connection method B AC charging cable and the charging (discharging) interface of the vehicle itself, energy transfer can be carried out between the charging vehicle and the discharging vehicle, and through the control module, the charging and discharging currents can be matched between vehicles with different battery parameters, so that ordinary electric vehicles can realize the mutual charging function without hardware modification, significantly improving the universality of the charging function.

[0034] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 is one of the schematic structural diagrams of the adapter provided by an embodiment of the present application;

[0037] Figure 2 is another schematic structural diagram of the adapter provided by an embodiment of the present application;

[0038] Figure 3 is still another schematic structural diagram of the adapter provided by an embodiment of the present application;

[0039] Figure 4 is the schematic structural diagram of the charge and discharge connection device provided by an embodiment of the present application.

[0040] REFERENCE SIGNS:

[0041] Adapter 100, first adapter member 110, second adapter member 120, control module 130, control and guidance circuit 131, main control circuit 132, power conversion circuit 133, energy storage unit 134, voltage detection circuit 135, power supply wire 140, Mode 3 connection Type B AC charging cable 200, first connection member 210, second connection member 220, connection cable 230, charging vehicle 300, charging interface 310, discharging vehicle 400, discharging interface 410, connection confirmation signal line CC, first to fifth resistors RC1 to RC5, first to second switches S1 to S2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0043] In the following description, "circuit" refers to a conductive loop formed by at least one component or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "coupled to" or "connected to" another element, or when an element / circuit is said to be "coupled between" or "connected between" two nodes, it can be directly coupled or connected to the other element, or there may be intermediate elements. The connection between elements can be physical, logical, or a combination thereof. In contrast, when an element is said to be "directly coupled to" or "directly connected to" another element, it means there are no intermediate elements between the two.

[0044] In the description, terms such as "first", "second", etc. are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such numerical descriptors can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0045] In addition, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] At present, the charging of electric vehicles generally adopts Mode 3 connection method B to achieve power supply by connecting to an AC charging pile. From the perspective of vehicle power supply function, most electric vehicles on the market only support the vehicle-to-load (V2L) power supply function and do not have the direct vehicle-to-vehicle (V2V) charging ability.

[0047] In the related art, if vehicle-to-vehicle charging is to be achieved, it is necessary to meet the conditions that the two vehicles have the same configuration and both have the V2V function, and complete it with the charging equipment equipped with each vehicle, and the universality is poor.

[0048] Figure 1 is the structure of the adapter 100 provided by the embodiment of the present application. Refer to Figure 1, an embodiment of the present application provides an adapter 100. The first end of the adapter 100 is used to connect to the first end of the Mode 3 Connection Method B AC charging cable 200. The second end of the Mode 3 Connection Method B AC charging cable 200 is used to connect to the charging interface of the charging vehicle 300. The second end of the adapter 100 is used to connect to the discharging interface of the discharging vehicle 400. The adapter 100 includes a control module 130. The control module 130 is configured to connect to the charging interface through the Mode 3 Connection Method B AC charging cable, and is configured to send a current adjustment signal to the charging interface during the process of the discharging vehicle 400 charging the charging vehicle 300, so that the charging vehicle 300 gradually adjusts the charging current of the charging vehicle 300 in response to the current adjustment signal, so that the discharging current of the discharging vehicle 400 matches the charging current of the charging vehicle 300.

[0049] It should be noted that the on-vehicle charger and vehicle control device in the charging vehicle 300, and the bi-directional on-vehicle charger in the discharging vehicle 400 are standard configurations of electric vehicles in the current market. In the field of electric vehicle charging, charging modes are classified according to different charging scenarios and technical standards. Mode 3 is the charging mode 3 in the national standard, which refers to the charging method of transmitting alternating current from the power grid to the electric vehicle using a dedicated power supply device (such as an AC charging pile). And Connection Method B is a specific connection method in Mode 3, which means that the charging cable is permanently connected to the power supply device (charging pile), and a separable plug / socket is used at the vehicle end. Therefore, the Mode 3 Connection Method B AC charging cable 200 refers to a flexible cable assembly that meets the aforementioned national standard requirements.

[0050] The first end of the adapter 100 is connected to the charging port of the charging vehicle 300 through the Mode 3 Connection Method B AC charging cable 200, and the second end of the adapter 100 is connected to the discharging port of the discharging vehicle 400. That is, the adapter 100 uses the Mode 3 Connection Method B AC charging cable 200 to achieve energy transfer between the charging vehicle 300 and the discharging vehicle 400. The traditional Mode 3 Connection Method B AC charging cable 200 is usually only used to achieve charging of the vehicle by the charging pile. The adapter 100 of the present application realizes the reuse of the Mode 3 Connection Method B AC charging cable 200, so that it can also be utilized in the scenario of vehicle-to-vehicle charging, improving the utilization rate of the Mode 3 Connection Method B AC charging cable 200.

[0051] Since the battery states, charging requirements, and electrical characteristics of different vehicles vary, the discharge current of the discharging vehicle 400 and the charging current of the charging vehicle 300 may be different. Therefore, matching is required to ensure the safety, efficiency, and stability of the charging process. The control module 130 can monitor the current conditions of the discharging vehicle 400 and the charging vehicle 300 in real time, and gradually adjust the charging current of the charging vehicle 300 according to the current conditions of the discharging vehicle 400 and the charging vehicle 300, so that the discharge current of the discharging vehicle 400 matches the charging current of the charging vehicle 300, usually meaning that the charging current is equal to the discharge current.

[0052] When the rechargeable current of the charging vehicle 300 is relatively high while the discharging capacity of the discharging vehicle 400 is relatively low, the control module 130 can gradually reduce the charging current of the charging vehicle 300 until the charging current of the charging vehicle 300 is basically equal to the discharge current of the discharging vehicle 400, avoiding overcurrent discharge of the discharging vehicle 400. Conversely, if the initial charging current of the charging vehicle 300 is relatively low while the discharging capacity of the discharging vehicle 400 is relatively strong, the control module 130 can gradually increase the charging current of the charging vehicle 300 until the charging current of the charging vehicle 300 is basically equal to the discharge current of the discharging vehicle 400, so as to make full use of the electric energy of the discharging vehicle 400.

[0053] It should be noted that the control module 130 can control the charging vehicle 300 to operate with a relatively large charging current at the initial stage of charging, and then gradually reduce the charging current until it is basically equal to the discharge current of the discharging vehicle 400; or it can control the charging vehicle 300 to operate with a relatively small charging current at the initial stage of charging, and then gradually increase the charging current until it is basically equal to the discharge current of the discharging vehicle 400.

[0054] As an example, the rechargeable current of the charging vehicle 300 is 32A, and the actual maximum discharging capacity of the discharging vehicle 400 is 16A. The control module 130 can control the charging vehicle 300 to charge at 32A at the initial stage of charging. When overcurrent is detected at the discharging vehicle 400 end, the charging current of the charging vehicle 300 is gradually reduced until the charging current of the charging vehicle 300 is reduced to 16A, avoiding the inability to charge due to overcurrent protection of the discharging vehicle 400.

[0055] As another example, the rechargeable current of the charging vehicle 300 is 32A, and the actual maximum discharging capacity of the discharging vehicle 400 is 16A. The control module 130 can control the charging vehicle 300 to charge at 10A at the initial stage of charging, and gradually increase the charging current of the charging vehicle 300 until the charging current of the charging vehicle 300 rises to 16A, making full use of the electric energy of the discharging vehicle 400.

[0056] According to the adapter 100 of the present application, by multiplexing the mode 3 connection method B AC charging cable 200 and the charging (discharging) interface of the vehicle itself, energy transfer can be carried out between the charging vehicle 300 and the discharging vehicle 400, and the control module 130 can achieve the matching of the charging and discharging currents between vehicles with different battery parameters, enabling ordinary electric vehicles to achieve the mutual charging function without hardware modification, and significantly improving the universality of the charging function.

[0057] Figure 2 is the structure of the adapter 100 provided by the embodiment of the present application. Refer to Figure 2 , in some embodiments, the control module 130 includes a control pilot circuit 131 and a main control circuit 132. The control pilot circuit 131 is used to connect the control pilot terminal of the charging vehicle 300 through the mode 3 connection method B AC charging cable 200. The main control circuit 132 is connected to the control pilot circuit 131 and is configured to drive the control pilot circuit 131 to send a control pilot signal with an initial duty cycle to the control pilot terminal of the charging vehicle 300 when the discharging vehicle 400 starts to charge the charging vehicle 300, and gradually increase the duty cycle until the discharging current matches the charging current.

[0058] The control pilot circuit 131 is mainly used to guide the charging and discharging connection between the discharging vehicle 400 and the charging vehicle 300, and monitor the interaction function between the discharging vehicle 400 and the charging vehicle 300. The control pilot signal can be used as a "handshake signal" between the discharging vehicle 400 and the charging vehicle 300 to ensure normal communication between the two parties.

[0059] Specifically, the control pilot signal is a communication signal using PWM (Pulse Width Modulation) and amplitude alternation. The main control circuit 132 drives the control pilot circuit 131 to precisely control the charging current by adjusting the duty cycle of the control pilot signal.

[0060] When the discharging vehicle 400 is ready to start charging the charging vehicle 300, the main control circuit 132 drives the control pilot circuit 131 to send a PWM signal with an initial duty cycle to the control pilot terminal of the charging vehicle 300. The specific value of the initial duty cycle can be selected according to the actual application scenario and is not limited here.

[0061] As an example, the charging current of electric vehicles on the market is basically greater than 10A. Therefore, the initial charging current value of the charging vehicle 300 can be determined as 10A. According to the national standard, within the range of 10% - 85% of the duty cycle, the charging current is linearly positively correlated with the duty cycle, and the calculation formula is: I = duty cycle × 100 × 0.6 (unit: A). According to the above formula, when the initial charging current value is 10A, the initial duty cycle is approximately 0.17.

[0062] When the initial charging current value of the charging vehicle 300 is determined to be 10 A, an ordinary vehicle can charge the charging vehicle 300. For example, the maximum discharging capacity of the discharging vehicle 400 is 16 A. To increase the charging current of the charging vehicle 300 from 10 A to 16 A, the duty ratio of the control guiding signal can be gradually increased to 0.27.

[0063] When the discharging vehicle 400 charges the charging vehicle 300, a control guiding signal with a smaller duty ratio is provided first to make the charging current smaller, and then the charging current is gradually increased, which can ensure that the discharging vehicle 400 can always charge the charging vehicle 300 and will not trigger the overcurrent protection of the discharging vehicle 400, improving the safety and reliability of the charging process.

[0064] As another example, the maximum allowable charging current of the charging vehicle 300 is 32 A, and the maximum discharging capacity of the discharging vehicle 400 is 16 A. The control guiding circuit 131 can send a control guiding signal with an initial duty ratio of 53% to the control guiding terminal of the charging vehicle 300, and the charging vehicle 300 charges with a charging current of 32 A. In this case, the discharging vehicle 400 discharges overcurrent, and the switches K1' and K2' will be disconnected in a short time. The control guiding circuit 131 gradually reduces the duty ratio of the control guiding signal until the charging current of the charging vehicle 300 is adjusted to 16 A.

[0065] In some embodiments, the adapter 100 has a power supply wire 140. The first end of the power supply wire 140 is used to connect to the charging interface 310 through the mode 3 connection method B AC charging line 200, and the second end of the power supply wire 140 is used to connect to the discharging interface 410. The control module 130 further includes a power conversion circuit 133. The input end of the power conversion circuit 133 is connected to the power supply wire 140, and the output end of the power conversion circuit 133 is electrically connected to the power supply end of the main control circuit 132. The power conversion circuit 133 is configured to convert the electrical energy of the power supply wire 140 into the rated operating voltage of the main control circuit 132.

[0066] The power supply wire 140 refers to the live wire and the neutral wire. The first end of the power supply wire 140 in the adapter 100 is used to connect to the live wire and the neutral wire in the charging vehicle 300 through the mode 3 connection method B AC charging line 200, and the first end of the power supply wire 140 is used to connect to the live wire and the neutral wire in the discharging vehicle 400 to realize the electrical energy transmission between the charging vehicle 300 and the discharging vehicle 400.

[0067] The input end of the power conversion circuit 133 is connected to the power supply wire 140, and is mainly used to convert the electrical energy on the power supply wire 140 into the rated working voltage of the main control circuit 132 during the charging process of the discharging vehicle 400 to the charging vehicle 300, so as to provide a stable working power supply for the main control circuit 132.

[0068] The specific structure of the power conversion circuit 133 can be determined according to the actual application scenario. For example, the power conversion circuit 133 may include a rectification circuit and a buck circuit.

[0069] During the charging process of the discharging vehicle 400 to the charging vehicle 300, electrical energy always exists on the power supply wire 140. The power conversion circuit 133 directly converts the electrical energy on the power supply wire 140 and provides it to the power supply end of the main control circuit 132, which can meet the electrical energy required for the operation of the control and guidance circuit 131, without designing a complex power supply circuit for the main control circuit 132, reducing the cost.

[0070] In some embodiments, the control module 130 further includes an energy storage unit 134. The output end of the energy storage unit 134 is connected to the power supply end of the main control circuit 132.

[0071] When the discharging vehicle 400 discharges overcurrent, the switches K1' and K2' will be disconnected in a short time. In this case, the main control unit cannot draw power from the power supply wire 140. The electrical energy stored in the energy storage unit 134 can supply power to the main control circuit 132, enabling it to drive the control and guidance circuit 131 to gradually reduce the duty cycle of the control and guidance signal until the charging current of the charging vehicle 300 matches the discharging current of the discharging vehicle 400.

[0072] In some embodiments, the control module 130 further includes a voltage detection circuit 135. The voltage detection circuit 135 is connected to the control and guidance circuit 131 and is configured to detect the voltage at the output end of the control and guidance circuit 131; the main control circuit 132 is connected to the voltage detection circuit 135 and is configured to judge the connection state of the charging vehicle 300 according to the voltage at the output end of the control and guidance circuit 131.

[0073] The control and guidance circuit 131 is used to connect the control and guidance terminal of the charging vehicle 300 with the mode 3 connection type B AC charging cable 200 through the mode 3 connection. When the adapter 100 is successfully connected to the mode 3 connection type B AC charging cable 200, before the charging interface 310 of the charging vehicle 300 is connected to the mode 3 connection type B AC charging cable 200, the control and guidance signal output by the control and guidance circuit 131 is a 12V high level; after the charging interface 310 of the charging vehicle 300 is connected to the mode 3 connection type B AC charging cable 200, due to the existence of the voltage dividing resistor in the on-board charger of the charging vehicle 300, the control and guidance signal jumps to 9V.

[0074] Based on the voltage of the control guiding signal output by the main control circuit 132, it can be determined whether the charging vehicle 300 is connected to the mode 3 connection method B AC charging cable 200. Accordingly, the start, stop, and parameter adjustment of the charging process are controlled, enabling intelligent management of the charging process.

[0075] The charging vehicle 300 is sequentially connected to the discharging vehicle 400 through the mode 3 connection method B AC charging cable 200 and the adapter 100. After confirming the charging signal, the voltage dividing resistor in the on-vehicle charger is switched, and the control guiding signal jumps to 6V. After the main control circuit 132 detects that the control guiding signal jumps to 6V, the switch K1' and switch K2' in the discharging vehicle 400 and the switch K1 and switch K2 in the charging vehicle 300 are closed, and the discharging vehicle 400 starts to charge the charging vehicle 300.

[0076] In some embodiments, the adapter includes: a first adapter member 110 and a second adapter member 120. The first adapter member 110 is used to connect the first end of the mode 3 connection method B AC charging cable 200. The second adapter member 120 is connected to the first adapter member 110, and the second adapter member 120 is used to connect the discharging interface 410.

[0077] The first adapter member 110 is a component for connecting the adapter to the external charging cable. The first adapter member 110 is used to connect to the first end of the mode 3 connection method B AC charging cable 200. The mode 3 connection method B is usually a plug structure, so the first adapter member 110 can be a socket structure, enabling reliable electrical connection performance and good mechanical stability. When connecting to the first end of the mode 3 connection method B AC charging cable 200, the first adapter member 110 can ensure a stable electrical path is formed between the mode 3 connection method B AC charging cable 200 and the adapter 100, ensuring that current can smoothly transfer from the charging cable to the inside of the adapter.

[0078] The second adapter member 120 is connected to the first adapter member 110, enabling unobstructed transmission of signals and current between the two adapter members. The main function of the second adapter member 120 is to connect to the discharging interface. The discharging interface is usually a socket structure, so the second adapter member 120 can be a plug structure. When connecting to the discharging interface, it can quickly and accurately complete the docking, ensuring the efficiency and safety of power transmission.

[0079] Figure 3 This is the structure of the adapter 100 provided by the embodiments of the present application. Refer to Figure 3, in some embodiments, the adapter 100 has a connection confirmation signal line CC. The first end of the connection confirmation signal line CC is used to connect to the first connection confirmation terminal of the mode 3 connection method B AC charging cable 200, and the second end of the connection confirmation signal line CC is used to connect to the connection confirmation terminal of the discharging vehicle 400. The first adapter 110 includes a first resistor RC1 and a first switch S1. The first end of the first resistor RC1 is used to connect to the body ground of the discharging vehicle 400 and is used to connect to the body ground of the charging vehicle 300 through the mode 3 connection method B AC charging cable 200; the first end of the first switch S1 is connected to the second end of the second resistor RC2, and the second end of the first switch S1 is connected to the connection confirmation signal line CC.

[0080] It should be noted that the connection order of the charging vehicle 300, the discharging vehicle 400, the adapter 100, and the mode 3 connection method B AC charging cable 200 can be selected according to the actual application scenario and is not limited here. For example, the adapter 100 can be first connected to the mode 3 connection method B AC charging cable 200, then the mode 3 connection method B AC charging cable 200 is connected to the charging vehicle 300, and the adapter 100 is connected to the discharging vehicle 400; or the charging vehicle 300 is first connected to the mode 3 connection method B AC charging cable 200, the discharging vehicle 400 is connected to the adapter 100, and then the adapter 100 is connected to the mode 3 connection method B AC charging cable 200.

[0081] The connection confirmation signal line CC is mainly used to confirm whether the physical connection between the charging vehicle 300 and the discharging vehicle 400 has been established. When the adapter 100 is first connected to the discharging vehicle 400, the connection confirmation signal line CC in the adapter 100 is connected to the connection confirmation signal line CC in the discharging vehicle 400 through the connection confirmation terminal of the discharging vehicle 400.

[0082] The first resistor RC1 and the first switch S1 are connected in series and are connected between the body ground of the discharging vehicle 400 and the connection confirmation signal line CC. When the adapter 100 is not connected to the mode 3 connection method B AC charging cable 200, the first switch S1 can be in a closed state. When the adapter 100 is first connected to the discharging vehicle 400, the control device in the discharging vehicle 400 can determine the connection state between the discharging vehicle 400 and the adapter 100 by detecting the resistance value of the first resistor RC1. If the resistance value of the first resistor RC1 detected by the control device in the discharging vehicle 400 is the same as the first preset resistance value, it indicates that the connection between the discharging vehicle 400 and the adapter 100 and the discharging vehicle 400 is completed. The first preset resistance value refers to the theoretical resistance value of the first resistor RC1.

[0083] In some embodiments, the first switch S1 is a normally closed trigger switch, and the first switch S1 is configured to switch from a closed state to an open state when the first adapter 110 is connected to the mode 3 connection method B AC charging cable 200.

[0084] It should be noted that the charging interface 310 of the charging vehicle 300 and the discharging interface 410 of the discharging vehicle 400 are usually both socket structures, and the first end and the second end of the mode 3 connection method B AC charging cable 200 are usually both plug structures. To adapt to the mode 3 connection method B AC charging cable 200 and the discharging vehicle 400, the first adapter 110 of the adapter 100 can adopt a socket structure, and the first adapter 110 of the adapter 100 can adopt a plug structure.

[0085] The first switch S1 can be disposed on the end face of the first adapter 110. When the first adapter 110 is connected to the mode 3 connection method B AC charging cable 200, when the socket structure of the discharging interface 410 of the discharging vehicle 400 is coupled with the plug structure of the first adapter 110, the first switch S1 is mechanically triggered and switches from a closed state to an open state.

[0086] In other embodiments, the first switch S1 can be disposed at any position on the first adapter 110 that can be touched by a user. When the user actively presses the first switch S1, the first switch S1 switches from a closed state to an open state.

[0087] In some embodiments, the second adapter 120 includes a fifth resistor RC5. The fifth resistor RC5 is disposed on the connection confirmation signal line CC.

[0088] When the adapter 100 is first connected to the discharging vehicle 400, the adapter 100 is not connected to the mode 3 connection method B AC charging cable 200, and the first switch S1 is in a closed state. The first resistor RC1 and the fifth resistor RC5 are connected in series on the loop between the connection confirmation signal line CC and the body ground of the discharging vehicle 400. The control device in the discharging vehicle 400 can determine the connection state between the discharging vehicle 400 and the adapter 100 by detecting the sum of the resistance values of the first resistor RC1 and the fifth resistor RC5. If the sum of the resistance values of the first resistor RC1 and the fifth resistor RC5 detected by the control device in the discharging vehicle 400 is the same as the second preset resistance value, it indicates that the discharging vehicle 400 and the adapter 100 are connected to the discharging vehicle 400. The second preset resistance value refers to the theoretical value of the sum of the resistance values of the first resistor RC1 and the fifth resistor RC5.

[0089] Figure 4 is the structure of the charging and discharging connection device provided by the embodiments of the present application. Refer to Figure 4, an embodiment of the present application provides a charge-discharge connection device, including: a Mode 3 connection method B AC charging cable 200 and the aforementioned adapter 100; wherein, the first end of the adapter 100 is connected to the first end of the Mode 3 connection method B AC charging cable 200, the second end of the Mode 3 connection method B AC charging cable 200 is used to connect to the charging interface 310 of the charging vehicle 300, and the second adapter 120 in the adapter 100 is used to connect to the discharge interface 410 of the discharging vehicle 400.

[0090] The Mode 3 connection method B AC charging cable 200 in the charge-discharge connection device is mainly used to connect to the charging interface 310 of the charging vehicle 300, and the adapter 100 is used to connect to the discharge interface 410 of the discharging vehicle 400, forming an electric energy transmission path between the charging vehicle 300 and the discharging vehicle 400.

[0091] For the specific structure and working principle of the adapter 100, reference can be made to the foregoing embodiments, which will not be elaborated here.

[0092] According to the charge-discharge connection device of the present application, by reusing the Mode 3 connection method B AC charging cable 200 and the charging (discharging) interface of the vehicle itself, energy can be transmitted between the charging vehicle 300 and the discharging vehicle 400, and the charge-discharge current can be matched between vehicles with different battery parameters through the control module 130, enabling ordinary electric vehicles to achieve the mutual charging function without hardware modification, and significantly improving the universality of the charging function.

[0093] In some embodiments, the Mode 3 connection method B AC charging cable 200 includes a first connector 210 and a second connector 220. The first connector 210 is connected to the first end of the adapter; the second connector 220 is connected to the first connector 210 through a connection cable 230. The second connector 220 includes a second resistor RC2 and a third resistor RC3. The first end of the second resistor RC2 is used to connect to the body ground of the charging vehicle 300, and the second end of the second resistor RC2 is used to connect to the connection confirmation terminal of the charging vehicle 300; the first end of the third resistor RC3 is used to connect to the body ground of the discharging vehicle 400 through the adapter 100, and the second end of the third resistor RC3 is connected to the connection confirmation signal line CC in the adapter 100.

[0094] The connection cable 230 includes a live wire, a neutral wire, a ground wire, a connection confirmation signal line CC, and a control pilot wire. The first connector 210 and the second connector 220 of the Mode 3 connection method B AC charging cable 200 are connected through the connection cable 230.

[0095] The vehicle control device of the charging vehicle 300 can determine the connection status of the charging vehicle 300 and the mode 3 connection method B AC charging cable 200 by identifying the resistance value of the second resistor RC2. When the charging vehicle 300 is connected to the mode 3 connection method B AC charging cable 200, the first end of the second resistor RC2 is connected to the vehicle body ground of the charging vehicle 300, and the second end of the second resistor RC2 is connected to the connection confirmation signal line CC in the charging vehicle 300 through the connection confirmation terminal of the charging vehicle 300. After the vehicle control device of the charging vehicle 300 identifies the second resistor RC2, it compares the resistance value of the second resistor RC2 with a third preset resistance value. When the resistance value of the second resistor RC2 is the same as the third preset resistance value, it can be determined that the charging vehicle 300 is successfully connected to the mode 3 connection method B AC charging cable 200. The third preset resistance value refers to the theoretical resistance value of the second resistor RC2.

[0096] After the connection between the adapter 100 and the discharging vehicle 400 is completed, the vehicle control device of the discharging vehicle 400 can determine the connection status of the mode 3 connection method B AC charging cable 200 and the adapter 100 by identifying the sum of the resistance values of the third resistor RC3 and the fifth resistor RC5. From the foregoing embodiments, it can be seen that when the adapter 100 is connected to the discharging vehicle 400, the vehicle control device of the discharging vehicle 400 can determine the connection status of the adapter 100 and the discharging vehicle 400 by identifying the sum of the resistance values of the first resistor RC1 and the fifth resistor RC5. When the mode 3 connection method B AC charging cable 200 is connected to the adapter 100, the first switch S1 is switched from the closed state to the open state, the first resistor RC1 is open-circuited, the first end of the third resistor RC3 is connected to the vehicle body ground of the discharging vehicle 400 through the adapter 100, and the second end of the third resistor RC3 is connected to the connection confirmation signal line CC of the discharging vehicle 400 through the connection confirmation signal line CC in the adapter 100, which is equivalent to the third resistor RC3 and the fifth resistor RC5 being connected in series on the loop between the vehicle body ground of the discharging vehicle 400 and the connection confirmation signal line CC. The vehicle control device of the discharging vehicle 400 identifies the sum of the resistance values of the third resistor RC3 and the fifth resistor RC5, compares the identified resistance value with a fourth preset resistance value, and when the identified resistance value is the same as the fourth preset resistance value, it can be determined that the mode 3 connection method B AC charging cable 200 is successfully connected to the adapter 100.

[0097] In some embodiments, the second connector 220 further includes a second switch S2 and a fourth resistor RC4. The first end of the second switch S2 is connected to the first end of the third resistor RC3; the first end of the fourth resistor RC4 is connected to the second end of the second switch S2, and the second end of the fourth resistor RC4 is connected to the second end of the third resistor RC3.

[0098] The type of the second switch S2 can be selected according to the actual application scenario and is not limited herein. The second switch S2 can be a normally open switch or a normally closed switch. The following takes the second switch S2 as a normally open switch as an example for illustration.

[0099] After the connection between the AC charging cable 200 of Mode 3 connection method B, the adapter 100, and the discharging vehicle 400 is completed, the vehicle control device of the discharging vehicle 400 can judge the connection state between the charging vehicle 300 and the AC charging cable 200 of Mode 3 connection method B by identifying the resistance value change between the connection confirmation signal line CC and the body ground. It can be known from the foregoing embodiments that after the connection between the AC charging cable 200 of Mode 3 connection method B, the adapter 100, and the discharging vehicle 400 is completed, the vehicle control device of the discharging vehicle 400 identifies the sum of the resistance values of the third resistor RC3 and the fifth resistor RC5. When the charging vehicle 300 is connected to the AC charging cable 200 of Mode 3 connection method B, the second switch S2 switches from the open state to the closed state, and the third resistor RC3 is short-circuited. At this time, the resistance value identified by the vehicle control device of the discharging vehicle 400 changes from the sum of the resistance values of the third resistor RC3 and the fifth resistor RC5 to the sum of the resistance values of the fifth resistor RC5 and the fourth resistor RC4.

[0100] When the second switch S2 is a normally closed switch, the vehicle control device of the discharging vehicle 400 can also judge the connection state between the charging vehicle 300 and the AC charging cable 200 of Mode 3 connection method B by identifying the resistance value change between the connection confirmation signal line CC and the body ground. When the charging vehicle 300 is not connected to the AC charging cable 200 of Mode 3 connection method B, the third resistor RC3 is short-circuited. At this time, the resistance value identified by the vehicle control device of the discharging vehicle 400 is the sum of the resistance values of the fifth resistor RC5 and the fourth resistor RC4. When the charging vehicle 300 is connected to the AC charging cable 200 of Mode 3 connection method B, the second switch S2 switches from the closed state to the open state, and the fourth resistor RC4 is open-circuited. At this time, the resistance value identified by the vehicle control device of the discharging vehicle 400 changes to the sum of the resistance values of the third resistor RC3 and the fifth resistor RC5.

[0101] It should be noted that the resistance values of the first resistor RC1, the second resistor RC2, the third resistor RC3, the fourth resistor RC4, and the fifth resistor RC5 can be determined according to the actual application scenario and are not limited herein.

[0102] In some embodiments, the second switch S2 is a normally open trigger switch, and the second switch S2 is configured to switch from the open state to the closed state when the second connector 220 is connected to the charging interface 310 of the charging vehicle 300.

[0103] Referring to the foregoing embodiments, the second connector 220 is generally a plug structure. The second switch S2 can be disposed on the end face of the second connector 220. When the socket structure of the charging interface 310 of the charging vehicle 300 is coupled with the plug structure of the second connector 220, the second switch S2 is mechanically triggered and switched from an open state to a closed state.

[0104] In some other embodiments, the second switch S2 can be disposed at any position on the second connector 220 that can be touched by a user. When the user actively presses the second switch S2, the second switch S2 is switched from an open state to a closed state.

[0105] An embodiment of the present application provides a charging and discharging system, including: a charging vehicle 300, a discharging vehicle 400, and the foregoing charging and discharging connection device. The charging vehicle 300 is connected to the mode 3 connection method B AC charging line 200 in the charging and discharging connection device, and the discharging vehicle 400 is connected to the adapter 100 in the charging and discharging connection device.

[0106] After charging is completed, it is necessary to disconnect the connection between the charging vehicle 300 and the discharging vehicle 400. The disconnection sequence can also be selected according to the actual application scenario and is not limited herein.

[0107] If the mode 3 connection method B AC charging line 200 and the adapter 100 are disconnected first, the first switch S1 is switched from an open state to a closed state. When the resistance between the connection confirmation signal line CC recognized by the vehicle control device in the discharging vehicle 400 and the body ground of the discharging vehicle 400 changes from the sum of the resistance values of the fifth resistor RC5 and the fourth resistor RC4 to the sum of the resistance values of the fifth resistor RC5 and the first resistor RC1, the discharging vehicle 400 stops discharging to prevent unplugging while charged.

[0108] If the charging vehicle 300 and the mode 3 connection method B AC charging line 200 are disconnected first, the second switch S1 is switched from a closed state to an open state. When the resistance between the connection confirmation signal line CC recognized by the vehicle control device in the discharging vehicle 400 and the body ground of the discharging vehicle 400 changes from the sum of the resistance values of the fifth resistor RC5 and the fourth resistor RC4 to the sum of the resistance values of the fifth resistor RC5 and the third resistor RC3, the discharging vehicle 400 stops discharging to prevent unplugging while charged.

[0109] In some other embodiments, the charging interface 310 of the charging vehicle 300 can be provided with an electronic lock. When the electronic lock is unlocked, the charging vehicle 300 stops charging to prevent unplugging while charged; the discharging interface 410 of the discharging vehicle 400 can also be provided with an electronic lock. When the electronic lock is unlocked, the discharging vehicle 400 stops discharging to prevent unplugging while charged.

[0110] In the charging and discharging system proposed in this application, the charging vehicle 300 and the discharging vehicle 400 can be any electric vehicle with V2L function on the market. The specific structure and working principle of the charging and discharging connection device can be referred to the foregoing embodiments, and will not be elaborated here.

[0111] According to the charging and discharging system of this application, by reusing the mode 3 connection method B AC charging cable 200 and the vehicle's own charging (discharging) interface, energy transfer can be carried out between the charging vehicle 300 and the discharging vehicle 400, and the charging and discharging currents can be matched between vehicles with different battery parameters through the control module 130, enabling ordinary electric vehicles to achieve the mutual charging function without hardware modification, and significantly improving the universality of the charging function.

[0112] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. An adapter, characterized in that, The first end of the adapter is used to connect to the first end of the Mode 3 Type B AC charging cable, the second end of the Mode 3 Type B AC charging cable is used to connect to the charging interface of the charging vehicle, the second end of the adapter is used to connect to the discharging interface of the discharging vehicle, and the adapter includes: A control module, configured to connect to the charging interface through the Mode 3 Type B AC charging cable, and configured to send a current regulation signal to the charging interface during the process of the discharging vehicle charging the charging vehicle, so that the charging vehicle responds to the current regulation signal to gradually adjust the charging current of the charging vehicle, so that the discharging current of the discharging vehicle matches the charging current of the charging vehicle.

2. The adapter according to claim 1, wherein The control module includes: A control pilot circuit, which is configured to connect to the control pilot terminal of the charging vehicle through the Mode 3 Type B AC charging cable; A main control circuit, connected to the control pilot circuit, and configured to drive the control pilot circuit to send a control pilot signal with an initial duty cycle to the control pilot terminal of the charging vehicle when the discharging vehicle starts to charge the charging vehicle, and gradually increase the duty cycle until the discharging current matches the charging current.

3. The adapter according to claim 2, characterized in that, The adapter has a power supply wire, the first end of the power supply wire is used to connect to the charging interface through the Mode 3 Type B AC charging cable, the second end of the power supply wire is used to connect to the discharging interface, and the control module further includes: A power conversion circuit, the input end of the power conversion circuit is connected to the power supply wire, the output end of the power conversion circuit is electrically connected to the power supply end of the main control circuit, and the power conversion circuit is configured to convert the electrical energy of the power supply wire into the rated working voltage of the main control circuit.

4. The adapter according to claim 2, characterized in that, The control module further includes: A voltage detection circuit, connected to the control pilot circuit, and configured to detect the voltage at the output end of the control pilot circuit; The main control circuit is connected to the voltage detection circuit, and configured to judge the connection state of the charging vehicle according to the voltage at the output end of the control pilot circuit.

5. The adapter according to any one of claims 1-4, characterized in that The adapter includes: A first adapter part, used to connect to the first end of the Mode 3 Type B AC charging cable, wherein the second end of the Mode 3 Type B AC charging cable is used to connect to the charging interface; A second adapter part, connected to the first adapter part, and the second adapter part is used to connect to the discharging interface.

6. The adapter according to claim 5, characterized in that, The adapter has a connection confirmation signal line, the first end of the connection confirmation signal line is used to connect to the first connection confirmation terminal of the Mode 3 Type B AC charging cable, the second end of the connection confirmation signal line is used to connect to the connection confirmation terminal of the discharging vehicle, and the first adapter part includes: A first resistor, the first end of the first resistor is used to connect to the body ground of the discharging vehicle, and is used to connect to the body ground of the charging vehicle through the Mode 3 Type B AC charging cable; A first switch, a first end of the first switch is connected to a second end of the first resistor, and a second end of the first switch is connected to the connection confirmation signal line.

7. The adapter according to claim 6, characterized in that The first switch is a normally closed trigger switch, and the first switch is configured to switch from a closed state to an open state when the first adapter is connected to the Mode 3 connection method B AC charging cable.

8. A charge and discharge connection device, characterized in that, Comprising: A Mode 3 connection method B AC charging cable and an adapter according to any one of claims 1-7; wherein, a first end of the adapter is connected to a first end of the Mode 3 connection method B AC charging cable, a second end of the Mode 3 connection method B AC charging cable is used to connect to a charging interface of a charging vehicle, and a second adapter in the adapter is used to connect to a discharge interface of a discharging vehicle.

9. The charge and discharge connection device according to claim 8, wherein The Mode 3 connection method B AC charging cable includes: A first connector, connected to a first end of the adapter; A second connector, connected to the first connector through a connection cable, and the second connector includes: A second resistor, a first end of the second resistor is used to connect to the body ground of the charging vehicle, and a second end of the second resistor is used to connect to the connection confirmation terminal of the charging vehicle; A third resistor, a first end of the third resistor is used to connect to the body ground of the discharging vehicle through the adapter, and a second end of the third resistor is connected to the connection confirmation signal line in the adapter.

10. The charge and discharge connection device according to claim 9, wherein The second connector further includes: A second switch, a first end of the second switch is connected to a first end of the third resistor; A fourth resistor, a first end of the fourth resistor is connected to a second end of the second switch, and a second end of the fourth resistor is connected to a second end of the third resistor.

11. The charge-discharge connection device according to claim 10, wherein The second switch is a normally open trigger switch, and the second switch is configured to switch from an open state to a closed state when the second connector is connected to a charging interface of a charging vehicle.

12. A charge-discharge system, characterized in that, Comprising: a charging vehicle, a discharging vehicle, and a charge-discharge connection device according to any one of claims 8-11, the charging vehicle is connected to the Mode 3 connection method B AC charging cable in the charge-discharge connection device, and the discharging vehicle is connected to the adapter in the charge-discharge connection device.

Images