Charging and discharging communication conversion device and charging and discharging method

Abstract

The present application provides a charging and discharging communication conversion device and a charging and discharging method. The charging and discharging communication conversion device comprises a first port, a second port, a third port, and a fourth port. The first port is configured to be electrically connected to a control bootstrap port of a charging and discharging socket to form a first communication loop. The second port is configured to be electrically connected to a control bootstrap port of an alternating current charging and discharging control device. The charging and discharging communication conversion device further comprises a first circuit connecting the second port and the first port. The third port is configured to communicate with a vehicle communication network. The fourth port is configured to be electrically connected to a communication port of a direct current charging and discharging control device to form a second communication loop. The charging and discharging communication conversion device performs signal conversion between the first communication loop and the second communication loop. Embodiments of the present application can be applied to new energy vehicles or intelligent driving vehicles, and can satisfy the requirements of charging and discharging standards in different regions with little or no modification to GB / T charging and discharging controllers.

Description

Charge / discharge communication conversion device and charge / discharge method

[0001] This application claims priority to Chinese Patent Application No. 202410819007.X, filed on June 21, 2024, entitled "Charge-Discharge Communication Conversion Device and Charging-Discharge Method", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy vehicles, and more specifically, to a charge-discharge communication conversion device and a charge-discharge method. Background Technology

[0003] For electric vehicles and other new energy vehicles, charging standards and requirements may differ across countries and regions. For example, in DC charging scenarios, European charging standards require the use of power line carrier (PLC) communication, while Chinese charging standards require the use of controller area network (CAN) communication. Therefore, when exporting Chinese electric vehicles and other new energy vehicles to other countries and regions, the vehicles need to be modified to match local standards. In particular, the architecture of the vehicle's charging system needs to be adjusted. Summary of the Invention

[0004] This application provides a charge-discharge communication conversion device and a charge-discharge method, which can meet the requirements of charge-discharge standards in different regions with little or no modification to the national standard charge-discharge controller.

[0005] In a first aspect, a charge-discharge communication conversion device is provided. This device includes a first port, a second port, a third port, and a fourth port. The first port is electrically connected to the control guide port of a charge-discharge socket to form a first communication loop; the second port is electrically connected to the control guide port of an AC charge-discharge control device, and the device further includes a first circuit connecting the second port and the first port; the third port is used for communication with a vehicle communication network; and the fourth port is electrically connected to the communication port of a DC charge-discharge control device to form a second communication loop.

[0006] The charge / discharge communication conversion device further includes a processing unit, which is configured to: determine whether the charge / discharge type is DC charge / discharge or AC charge / discharge based on first status information, wherein the first status information includes status information of the charge / discharge device connected to the charge / discharge socket, and the first status information is obtained through a first port and / or a third port; the processing unit is further configured to: convert a first signal into a second signal, wherein the first signal includes a signal input from one of the first port and a fourth port, and the second signal includes a signal output from the other of the first port and the fourth port.

[0007] In this application, a first circuit connects the control guide port of the AC charging / discharging control device to the control guide port of the charging / discharging socket, enabling the AC charging / discharging process to be controlled by the AC charging / discharging control device. Furthermore, the charging / discharging communication conversion device can communicate with an external charging / discharging device via a first communication loop and with a DC charging / discharging control device via a second communication loop. When the charging / discharging device and the DC charging / discharging control device meet different regional charging / discharging standards, the charging / discharging communication conversion device can match the interaction content in different communication loops by converting signals between the first and second communication loops, allowing the DC charging / discharging control device to control the DC charging / discharging process between the charging / discharging system and the external charging / discharging device. Therefore, the requirements of different regional charging / discharging standards can be met with minimal or no modification to the AC and / or DC charging / discharging controllers.

[0008] In some implementations, the first circuit may be equipped with a first switch.

[0009] In this application, by setting a first switch, the connection between the second port and the first port can be controlled, thereby achieving the effect of controlling the connection between the control guide port of the AC charging and discharging control device and the control guide port of the charging and discharging socket.

[0010] In some implementations, the first switch can be in a closed state during AC charging and discharging, and in a closed state during DC charging and discharging.

[0011] In this application, by controlling the opening and closing of the first switch, the connection between the AC charging / discharging control device and the control guide port of the charging / discharging socket can be disconnected. When the DC charging / discharging process is controlled by the DC charging / discharging control device, interference with the DC charging / discharging process caused by the AC charging / discharging control device detecting the signal of the first communication circuit can be avoided.

[0012] In some implementations, the charge / discharge communication conversion device may also include a ground protection port. The first port can be connected to the ground protection port via a second circuit. The second circuit may include: a first branch circuit equipped with a second switch and a first resistor, and a second branch circuit connected in parallel with the second switch and the first resistor; the second branch circuit may be equipped with a second resistor.

[0013] In this application, when the second switch is turned on and off, the potential difference across the second circuit changes. The external charging and discharging device can detect the change in voltage value at the corresponding detection point, thereby determining the change in the state of the charging and discharging communication conversion device.

[0014] In some implementations, the second switch can be in a closed state during DC charging and discharging, and in a closed state during AC charging and discharging.

[0015] In this application, the external charging and discharging device can determine the state of the second switch based on the voltage value detected at the corresponding detection point, so that the external charging and discharging device can know whether the charging and discharging communication conversion device is ready.

[0016] In some implementations, the second branch circuit can be equipped with a third switch.

[0017] Without the third switch, even if the second switch is open, the first port can still be electrically connected to the grounding protection port via the second branch circuit, which may interfere with the control of the AC charging and discharging process. In this application, by setting the third switch, the connection between the first port and the grounding protection port can be completely disconnected in conjunction with the second switch.

[0018] In some implementations, the third switch can be in a closed state during DC charging and discharging, and in a closed state during AC charging and discharging.

[0019] In this application, during AC charging, since both the second and third switches are in the off state, the charging and discharging communication conversion device can avoid detecting the signal of the first communication circuit and thus preventing interference with the control of the AC charging and discharging process.

[0020] In some implementations, the processing unit can also be used to: when the charging / discharging type is determined to be DC charging / discharging, control the third switch to close first, and then control the second switch to close.

[0021] In an AC charging / discharging scenario, the external charging / discharging standard can determine whether the charging / discharging communication conversion device is ready based on the change in the potential difference of the first communication circuit. In this application, by controlling the second and third switches to close sequentially in a corresponding order, the potential difference in the first communication circuit can undergo a preset change, thereby allowing the external charging / discharging device to know that the charging / discharging communication conversion device is ready.

[0022] In some implementations, the first switch can be a normally closed switch.

[0023] In some implementations, the third switch can be a normally open switch.

[0024] In this application, by setting the first switch as a normally closed switch and / or setting the third switch as a normally open switch, the control of the third switch and the first switch can be simplified.

[0025] In some implementations, the charge / discharge communication conversion device may also include a fifth port, which can be used to connect to the connection confirmation port of the DC charge / discharge control device.

[0026] In this application, by setting the fifth port, the requirements of the DC charge and discharge control device for detecting and confirming the connection status can be met.

[0027] In some implementations, the processing unit can also be used to: control the third resistor to be connected to the connection confirmation circuit where the fifth port is located during DC charging and discharging.

[0028] In this application, by controlling the connection of the third resistor to the connection confirmation circuit where the fifth port is located, the DC charge and discharge control device can know that the external charge and discharge device has been fully connected to the charge and discharge socket.

[0029] In some implementations, the first status information may include the connection confirmation status of the charging / discharging device. The connection confirmation port of the AC charging / discharging control device can be connected to the connection confirmation port of the charging / discharging socket, and the AC charging / discharging control device can be used to report the connection confirmation status.

[0030] In a second aspect, a charging and discharging method is provided, which may include: acquiring first state information, the first state information including state information of a charging and discharging device connected to a charging and discharging socket, the first state information being acquired through a first port and / or a third port; determining, based on the first state information, whether the charging and discharging type is DC charging and discharging or AC charging and discharging; and, in the DC charging and discharging state, converting a first signal into a second signal, the first signal including a signal input from one of the first port and a fourth port, the second signal including a signal output from the other of the first port and the fourth port.

[0031] The first port is used to electrically connect with the control guide port of the charging and discharging socket to form a first communication loop; the second port is used to electrically connect with the control guide port of the AC charging and discharging control device, and the second port is connected to the first port through the first circuit; the third port is used to communicate with the vehicle communication network; and the fourth port is used to electrically connect with the communication port of the DC charging and discharging control device to form a second communication loop.

[0032] In some implementations, the first circuit may be equipped with a first switch, and the method may further include: controlling the first switch to be in a closed state during AC charging and discharging; or, controlling the first switch to be in an open state during DC charging and discharging.

[0033] In some implementations, the first port can be connected to the grounding protection port via a second circuit. The second circuit may include: a first branch circuit equipped with a second switch and a first resistor, and a second branch circuit connected in parallel with the second switch and the first resistor; the second branch circuit may be equipped with a second resistor. The method may also include: controlling the second switch to be in a closed state during DC charging and discharging; or, controlling the second switch to be in an open state during AC charging and discharging.

[0034] In some implementations, the second branch circuit may be equipped with a third switch. The method further includes: controlling the third switch to be closed during DC charging / discharging; or, controlling the third switch to be open during AC charging / discharging.

[0035] In some implementations, the method may further include: when the charging / discharging type is determined to be DC charging / discharging, first controlling the third switch to close, and then controlling the second switch to close.

[0036] In some implementations, the third switch can be a normally open switch.

[0037] In some implementations, the first switch can be a normally closed switch.

[0038] In some implementations, the method may further include: in the DC charging and discharging state, controlling the third resistor to be connected to the connection confirmation circuit where the fifth port is located, the fifth port being used to connect to the connection confirmation port of the DC charging and discharging control device.

[0039] In some implementations, the first status information may include connection confirmation status information of the charging / discharging device. The connection confirmation port of the AC charging / discharging control device can be connected to the connection confirmation port of the charging / discharging socket, and the AC charging / discharging control device can be used to report the connection confirmation status.

[0040] Thirdly, a charging and discharging system is provided, which may include a charging and discharging socket, an AC charging and discharging control device and a DC charging and discharging control device, as well as the devices described in the first aspect and any possible implementation thereof.

[0041] Fourthly, a vehicle is provided that may include the means described in the first aspect and any possible implementation thereof, or may include the charging and discharging system of the third aspect.

[0042] Fifthly, this application provides a computer program product comprising: computer program code, which, when executed on a computer, causes the computer to perform the method in any possible implementation of the second aspect.

[0043] In a sixth aspect, this application provides a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to perform the method in any possible implementation of the second aspect.

[0044] In a seventh aspect, this application provides a chip including circuitry for performing the method in any possible implementation of the second aspect described above. Attached Figure Description

[0045] Figure 1 is a schematic diagram of a charging / discharging interface 10 provided in an embodiment of this application;

[0046] Figure 2 is a schematic diagram of another charging / discharging interface 20 provided in an embodiment of this application;

[0047] Figure 3 is a schematic diagram of the connection method of a charging and discharging interface, an on-board charger, and a charging and discharging controller 23 provided in an embodiment of this application;

[0048] Figure 4 is a schematic diagram of another charging / discharging interface 30 provided in an embodiment of this application;

[0049] Figure 5 is a schematic diagram of a system architecture provided in an embodiment of this application;

[0050] Figure 6 is a schematic diagram of another system architecture of the charging and discharging system provided in the embodiments of this application;

[0051] Figure 7 is a schematic flowchart of the charging and discharging method provided in an embodiment of this application;

[0052] Figure 8 is another schematic flowchart of the charging and discharging method provided in the embodiments of this application;

[0053] Figure 9 is a schematic block diagram of a device 3000 provided in an embodiment of this application. Detailed Implementation

[0054] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0055] For example, Figure 1 is a schematic diagram of a charging and discharging interface provided in an embodiment of this application. The charging and discharging interface 10 shown in Figure 1 can be used in DC charging and discharging scenarios that conform to Chinese standards (hereinafter referred to as national standards); it can also be called a national standard DC charging and discharging interface 10. For example, Chinese DC charging and discharging standards can refer to standards such as GB / T 18487 and GB20234, or to relevant charging and discharging standards that have been subsequently revised or added.

[0056] As shown in Figure 1(a), the charging / discharging interface 10 may include the following ports: DC power positive (denoted as DC+), DC power negative (denoted as DC-), low-voltage auxiliary power positive (denoted as A+), low-voltage auxiliary power positive (denoted as A+), charging communication CAN high voltage (denoted as S+), charging communication CAN low voltage (denoted as S-), connection confirm (CC) 1, connection confirm 2 (denoted as CC2), and protective earth (PE). Plug 11 and socket 12 may correspond to the charging / discharging interface 10.

[0057] As shown in Figure 1(b), external devices can be connected to the battery via the DC+ and DC- ports. The device ground of the external device can be connected to the vehicle's ground via the PE port. For example, the external device can be a charging device, such as a charging station; it can also be a discharging device, such as an external load.

[0058] The vehicle may include a standard DC charge / discharge controller 13 (hereinafter referred to as DC controller 13 or controller 13), which can be used to control the DC charging and discharging process. The DC controller 13 can interact with external devices through the charging and discharging interface 10. The external device can detect whether the vehicle is reliably connected through the CC1 port; the DC controller 13 can detect whether the external device is reliably connected through the CC2 port. Through the S+ and S- ports, the external device can communicate with the DC controller 13 via CAN to control the DC charging and discharging process.

[0059] For example, Figure 2 is a schematic diagram of another charging and discharging interface provided in an embodiment of this application. The charging and discharging interface 20 shown in Figure 2 can be used for AC charging and discharging scenarios that conform to Chinese standards; it can also be called a national standard AC charging and discharging interface 20. The plug 21 and the socket 22 can correspond to the charging and discharging interface 20. For example, the Chinese AC charging and discharging standards can refer to standards such as GB / T 18487 and GB20234, or to relevant charging and discharging standards that have been subsequently revised or added.

[0060] As shown in Figure 2(a), unlike the charging / discharging interface 10, the charging / discharging interface 20 may include the following ports: AC power phase lines 1 to 3 (denoted as L1 to L3 respectively), neutral line (denoted as N), CC, control pilot (CP) and PE.

[0061] As shown in Figure 2(b), the vehicle may include a national standard AC charge / discharge controller 23 (hereinafter referred to as AC controller 23 or controller 23), which can be used to control the AC charging and discharging process; the AC controller 23 can interact with external devices through the charging and discharging interface 20. The CC port can be used for connection confirmation with external devices. The CP port can be used for control and guidance of the charging and discharging process.

[0062] When the aforementioned charging and discharging interface, charging and discharging controller (e.g., controller 13 and / or controller 23), charging and discharging system can only be used in charging scenarios, they can also be referred to as charging interface, charging controller, charging system, etc.

[0063] Furthermore, Figures 1 and 2 above only show the ports of the charging and discharging interface conforming to Chinese standards, and do not show electrical components such as resistors and switches involved in the charging and discharging system; the corresponding charging and discharging system can be referred to relevant Chinese standards. For example, according to Chinese standards, a resistor (denoted here as resistor A, but may be used under other names in relevant standards) can be provided between the CC2 port and the PE port of plug 11. When plug 11 and socket 12 are fully connected, resistor A will be connected to the connection confirmation circuit of the CC2 port, and controller 13 can determine whether the external device is fully connected by detecting the voltage / resistance at a certain detection point in the circuit.

[0064] For example, the following uses an AC charging system as an example to illustrate the connection method between the charging and discharging socket 22 and the on-board charger and the national standard charging and discharging controller, with reference to Figure 3.

[0065] For example, Figure 3 illustrates one connection method between the charging / discharging interface 20, the on-board charger, and the national standard AC charging / discharging controller 23. For instance, in a charging scenario, when the vehicle completes its self-test and is in a charging-enabled state, switch S2 should be closed; charging devices such as charging piles can determine whether the national standard AC charging / discharging controller 23 is ready by detecting the effective value of the voltage at the corresponding detection point. As another example, the CC port can form a connection confirmation loop; the controller 23 can determine whether the plug 21 and socket 22 are fully connected by detecting the CC status at detection point 3 (e.g., the resistance value between detection point 3 and the PE port). Furthermore, in some implementations, switch S2 may not be configured.

[0066] For example, Figure 4 is a schematic diagram of several other charging and discharging interfaces provided in the embodiments of this application. Charging and discharging interfaces 30 and 40 can be used for charging and discharging scenarios conforming to European standards (hereinafter referred to as European standards) and American standards (hereinafter referred to as American standards), respectively. These two charging and discharging interfaces can be integrated charging and discharging interfaces; that is, they are coupled with AC charging and discharging interfaces and DC charging and discharging interfaces. European and American charging and discharging standards can refer to relevant standards of the International Electrotechnical Commission (IEC), the European Norm (EN), etc. (e.g., IEC 61851, IEC 61296, etc.), or to subsequent revisions or additions of relevant charging and discharging standards.

[0067] As shown in Figure 4(a), the charging / discharging interface 30 may include the following ports: L1 to L3, N, CP, proximity pilot (PP), DC+, DC-, and PE. The functions of the DC+ and DC- ports are similar to those of the corresponding ports in the charging / discharging interface 10; the functions of the L1 to L3, N, and PE ports are similar to those of the corresponding ports in the charging / discharging interface 20. Unlike the charging / discharging interface 20, the CP and PP ports can function as both AC and DC charging / discharging ports. The CP port can be used for duty cycle and PLC interaction. The PP port can be used for external device connection confirmation, and its function is similar to that of the CC port of the charging / discharging interface 20. The PP port can be understood as the connection confirmation port of the charging / discharging interface 30.

[0068] Compared to the Chinese standard charging and discharging interfaces shown in Figures 1 and 2, the European standard charging and discharging interface 30 does not include ports such as A+, A-, S+, and S-. Furthermore, the communication methods and protocols used in the European charging and discharging standard differ from those in the Chinese charging standard.

[0069] As shown in Figure 4(b), the ports included in the charging and discharging interface 40 are also different from those of the national standard charging and discharging interface.

[0070] Due to differences in charging and discharging standards across different countries / regions, the charging and discharging systems of electric vehicles and other new energy vehicles exported from China need to be adjusted when exporting to other countries / regions. Developing and designing a separate charging and discharging controller and corresponding charging and discharging system for each target region (such as Europe, North America, and Southeast Asia) would result in high development and parts costs, and would also be detrimental to vehicle manufacturers' parts inventory management.

[0071] In some embodiments, a charge-discharge communication conversion device, such as an electric vehicle communication controller (EVCC), can be incorporated into the charge-discharge system. This allows for control of the charge-discharge process based on a national standard charge-discharge controller, provided the target standard is met. However, since this approach involves multiple controllers, if the charge-discharge system is poorly designed, significant modifications to the hardware and / or software of the national standard charge-discharge controller may be required, resulting in a substantial increase in development and component costs.

[0072] In view of this, the embodiments of this application provide a charge-discharge communication conversion device and a charge-discharge method, which can take into account the requirements of charge-discharge standards in different regions with little or no modification to the national standard charge-discharge controller.

[0073] For example, Figure 5 is a schematic diagram of a system architecture provided in an embodiment of this application. The charging and discharging system 100 may include: a DC charging and discharging control device 110, an AC charging and discharging control device 120, a charging and discharging socket 130, and a charging and discharging communication conversion device 140. The system may also include an on-board charger (OBC), a battery, and a communication network.

[0074] The DC charge / discharge control device 110 and the AC charge / discharge control device 120 can comply with Chinese charge / discharge standards. For example, the DC charge / discharge control device 110 can be a controller 13; the AC charge / discharge control device 120 can be a controller 23.

[0075] The charging / discharging socket 130 can meet the charging / discharging standards of a first region; this first region refers to other regions outside of China, such as Europe, the United States, Canada, and certain countries in Southeast Asia. For example, the charging / discharging socket 130 can correspond to the charging / discharging interfaces 30 and 40 shown in Figure 4.

[0076] The communication network 150 can be used for information exchange between different control devices. For example, the communication network 150 can be a vehicle communication network; control devices such as the DC charge / discharge control device 110, AC charge / discharge control device 120, charge / discharge communication conversion device 140, battery management system, and vehicle control unit (VCU) can exchange information through the vehicle communication network. As another example, the communication network 150 may include a CAN bus.

[0077] The charge / discharge communication conversion device 140 may include a first port, a second port, a third port, and a fourth port. The first port can be connected to the CP port of the charge / discharge socket 140 to form a first communication loop with an external charge / discharge device. The second port can be connected to the CP port of the AC charge / discharge control device 120, and the second port can be connected to the first port through a first circuit; the third port can be connected to the communication network 150; and the fourth port can be connected to the communication port of the DC charge / discharge control device 110 to form a second communication loop.

[0078] For example, taking controller 23 as an example, the port on controller 23 used to connect to the CP port of socket 22 can be the CP port of controller 23; the port on controller 23 used to connect to the CC port of socket 22 can be the CC port of controller 23. As another example, taking controller 13 as an example, the port on controller 13 used to connect to the S+ and S- ports of socket 12 can be the communication port of controller 13. As another example, the interface on controller 13 used to connect to the CC2+ port of socket 12 can be the connection confirmation port of controller 13. As another example, the charge / discharge communication conversion device 140 can communicate bidirectionally with an external charge / discharge device through a first communication loop; the charge / discharge communication conversion device 140 can communicate bidirectionally with the DC charge / discharge control device 110 through a second communication loop.

[0079] For example, regarding AC charging and discharging scenarios, the relevant requirements in standards from different regions differ only slightly. For instance, for charging and discharging interfaces 20 and 30, both can be controlled and guided by the PWM signal transmitted through the CP port during AC charging; the corresponding charging and discharging controllers can determine parameters such as charging current limits based on the duty cycle of the PWM signal. Therefore, no adjustments to the software / hardware of the national standard AC charging and discharging controller 20 are needed to meet the relevant requirements of the European standard.

[0080] The CC port of the AC charging / discharging control device 120 can be connected to the PP port of the charging / discharging socket 130 to form a connection confirmation loop. The CP port of the AC charging / discharging device 120 can be connected to the CP port of the charging / discharging socket 130 through the first circuit of the charging / discharging communication conversion device 140. The AC charging / discharging control device 120 obtains connection confirmation status information and control guidance status information of the external charging / discharging device by detecting the CC status and CP status at corresponding detection points. Furthermore, the status information of the charging / discharging device can be reported to the communication network 150.

[0081] The charge / discharge communication conversion device 140 may include a processing unit 141. The processing unit 141 may be used to determine whether the charge / discharge type is DC charge / discharge or AC charge / discharge based on first status information. This first status information may include status information of an external charge / discharge device. For example, the processing unit 141 may be connected to a third port; the processing unit 141 may obtain the CC status and / or CP status from the third port.

[0082] In some embodiments, a detection point is provided between the processing unit 141 and the first port, which can be used to detect the CP status of the charging and discharging device. For example, the processing unit 141 can obtain the CP status from the first port. As another example, based on the CP status obtained from the first port, the processing unit 141 can verify the CP status obtained from the third port; through matching verification, faults in the charging and discharging system can be detected in a timely manner.

[0083] In this embodiment, the CC port and CP port of the AC charge / discharge control device 120 can be connected to an external charge / discharge device, so that the AC charge / discharge process can be controlled by the AC charge / discharge control device 120.

[0084] For example, the relevant requirements for DC charging and discharging scenarios vary considerably in standards across different regions. For instance, in a DC charging and discharging scenario, controller 13 can communicate with an external charging and discharging device via CAN bus through ports S+ and S- of charging and discharging interface 10; while charging and discharging interface 30 can communicate with an external charging and discharging device via PLC through CP.

[0085] The processing unit 141 can be connected to both the first port and the fourth port. The processing unit 141 can perform signal conversion between the first communication loop and the second communication loop. For example, the processing unit 141 can convert signal A input from the first port into signal A' and output signal A' from the fourth port. As another example, the processing unit 141 can convert signal B input from the fourth port into signal B' and output signal B' from the first port. In this way, during DC charging and discharging, the external charging and discharging device can communicate bidirectionally with the DC charging and discharging control device 110.

[0086] In this embodiment, the charge / discharge communication conversion device 140 can communicate with an external charge / discharge device conforming to the standards of a first region via a first communication loop, and can also communicate with a DC charge / discharge control device 110 conforming to Chinese standards via a second communication loop. By performing signal conversion between the first and second communication loops, the interaction content in different communication loops can be matched, enabling the DC charge / discharge control device 110 to control the DC charge / discharge process between the charge / discharge system 100 and the external charge / discharge device.

[0087] In some embodiments, a first switch may be provided in the first circuit. By controlling the on / off state of the first switch, the connection between the second port and the first port can be controlled, as can the connection between the CP port of the AC charging / discharging control device 120 and the CP port of the charging / discharging socket 130.

[0088] For example, in AC charging and discharging mode, the first switch can be in a closed state; at this time, the second port can be electrically connected to the first port. In DC charging and discharging mode, the first switch can be in an open state; at this time, the second port will be disconnected from the first port.

[0089] In this embodiment, by controlling the opening and closing of the first switch, the connection between the AC charging / discharging control device 120 and the CP port of the charging / discharging socket 130 can be disconnected. When the DC charging / discharging process is controlled by the DC charging / discharging control device 110, interference with the DC charging / discharging process caused by the AC charging / discharging control device 120 detecting the signal of the first communication circuit can be avoided.

[0090] The charge / discharge communication conversion device 140 may also include a PE port.

[0091] For example, the charge / discharge communication conversion device 140 may also include a second circuit connecting the first port and the PE port.

[0092] In some embodiments, the second circuit may include a first branch with a second switch and a first resistor, and a second branch connected in parallel with the second switch and the first resistor, wherein the second branch may include a second resistor.

[0093] In this embodiment, when the second switch is turned on and off, the potential difference across the second circuit changes. The voltage value detected by the external charging / discharging device at the corresponding detection point changes, thereby indicating the change in the state of the charging / discharging communication conversion device 140.

[0094] For example, the second switch can be in a closed state during DC charging and discharging, and in a closed state during AC charging and discharging.

[0095] In this embodiment, the external charging and discharging device can determine the state of the second switch based on the voltage value detected at the corresponding detection point, so that the external charging and discharging device can know whether the charging and discharging communication conversion device 140 is ready.

[0096] In some embodiments, a third switch may be provided on the second branch line.

[0097] Without the third switch, even if the second switch is in the off state, the first port can still be electrically connected to the PE port via the second branch circuit. In this embodiment, by providing the third switch, the electrical connection between the first port and the PE port can be completely disconnected in conjunction with the second switch.

[0098] In some embodiments, the third switch may be in a closed state during DC charging and discharging; and in a closed state during AC charging and discharging.

[0099] In this embodiment of the application, during AC charging, since both the second and third switches are in the off state, the charging and discharging communication conversion device 140 can avoid detecting the signal of the first communication circuit and thus preventing interference with the control of the AC charging and discharging process.

[0100] In some embodiments, when the charging / discharging type is determined to be DC charging / discharging, the processing unit 141 may first control the third switch to close, and then control the second switch to close.

[0101] In an AC charging / discharging scenario, an external charging / discharging device conforming to the standards of the first region can determine whether the charging / discharging communication conversion device 140 is ready based on the change in the potential difference of the first communication circuit. In this embodiment, by controlling the second and third switches to close sequentially in a corresponding order, the potential difference in the first communication circuit can change, thereby allowing the external charging / discharging device to determine whether the charging / discharging communication conversion device 140 is ready.

[0102] In some embodiments, the second circuit may not include electrical components such as a second switch, a first resistor, and a second resistor.

[0103] In some embodiments, the first switch can be a normally closed switch; the second switch can be a normally open switch; and the third switch can be a normally open switch. This simplifies the control of the first, second, and third switches.

[0104] For example, the charge / discharge communication conversion device may further include a fifth port, through which the charge / discharge communication conversion device 140 can be connected to the connection confirmation port of the DC charge / discharge control device 110. The fifth port and the connection confirmation port of the DC charge / discharge control device 110 can form a connection confirmation loop.

[0105] The charge / discharge communication conversion device may also include a third resistor; in DC charge / discharge mode, the third resistor can be connected to the connection confirmation circuit where the fifth port is located. This connection confirmation circuit can be used by the DC charge / discharge control device to confirm the connection to external devices.

[0106] In one embodiment, it is assumed that the DC charging / discharging control device 110 is a controller 13. As mentioned earlier, according to the requirements of Chinese standards, a resistor A (for example, the resistance value of resistor A can be 1000 ohms) can be provided between the CC2 port and the PE port of plug 11. When plug 11 and plug 12 are fully connected, resistor A is connected to the connection confirmation circuit where the CC2 port is located. The controller 13 can determine whether the external device is fully connected by detecting the voltage value of a certain detection point in the connection confirmation circuit. In system 100, in the DC charging / discharging state, a third resistor is connected to the connection confirmation circuit where the fifth port is located, which can simulate the function of resistor A in plug 11, so that the controller 13 can know that the charging / discharging socket 130 and the external charging / discharging device are fully connected. For example, the resistance value of the third resistor can refer to the requirements of the above-mentioned resistor A in Chinese standards. For another example, the resistance value of the third resistor can be set according to the connection relationship of the internal circuit of the charging / discharging communication conversion device.

[0107] The on-board charger may include two ports. One port can be connected to the AC power port of the charging / discharging socket 130, and the other port can be connected to the battery. For example, in a charging scenario, a charging pile can be connected to the vehicle through the charging / discharging socket 130; the port where the on-board charger is connected to the charging / discharging socket 130 can be used as a power input port, and the port where the on-board charger is connected to the battery can be used as a power output port. As another example, in a discharging scenario, an external load can be connected to the vehicle through the charging / discharging socket 130; in this case, the port where the on-board charger is connected to the charging / discharging socket 130 can be used as a power output port. Furthermore, taking the charging / discharging interface shown in Figure 4 as an example, ports L1, L2, L3, N, and L2 / N can correspond to AC power ports; DC+ and DC- can correspond to DC power ports.

[0108] In some embodiments, the first switch may not be provided in the first circuit; correspondingly, the second circuit may not be provided. The following description uses a charging scenario as an example.

[0109] Assume the AC charging / discharging control device 120 is controller 23. Based on China's charging standards, when the duty cycle of the PWM signal indicates that the charging type is AC charging, controller 23 can control switch S2 to close, so that the external charging device is aware that the vehicle is ready to charge. When the duty cycle of the PWM signal indicates that charging is not allowed or that the charging type is not AC charging, switch S2 can be in the open state.

[0110] When the first switch is not provided in the first circuit, the operating mode of the controller 23 can be adjusted. For example, when the duty cycle of the PWM signal indicates that the charging type is DC charging, the controller 23 can also control the switch S2 to close so that the external charging device knows that the vehicle is ready to charge.

[0111] In this embodiment, the internal circuitry of the charge-discharge communication conversion device 140 can be simplified by not setting a first switch, thereby reducing the cost of the charge-discharge communication conversion device 140.

[0112] The following example, taking some or all of Europe as the first region, is used to illustrate the system architecture of the charging and discharging system 100 in conjunction with Figure 6.

[0113] For example, Figure 6 is a schematic diagram of another system architecture of the charging and discharging system provided in the embodiments of this application.

[0114] As shown in Figure 6, the system 200 may include a DC controller 13, an AC controller 23, an EVCC, and a charging / discharging socket 32. The system 200 may also include an OBC and a battery. The charging / discharging socket 32 ​​may correspond to the charging / discharging interface 30; the EVCC may correspond to the charging / discharging communication conversion device 140. The system 200 can be understood as an extension or variation of the system 100.

[0115] The DC+ and DC- ports of the charging / discharging socket 32 ​​can be connected to a battery. The L1 to L3 ports and the N port of the charging / discharging socket 32 ​​can be connected to an OBC.

[0116] The OBC may include a power module for converting between AC and DC power. The power module connects to the battery for energy transfer; it can also connect to the charging / discharging socket 32 ​​for energy transfer. In a charging scenario, the OBC can supply electrical energy to the battery.

[0117] The EVCC may include control pilot ports CP1 and CP2, and circuit 1 for connecting ports CP1 and CP2. CP1 can be used for interaction between the EVCC and an external charging / discharging device; through circuit 1 and CP2, the EVCC can transfer the PWM signal from the charging / discharging socket 32 ​​to the AC controller 23. Circuit 1 may be equipped with a normally closed switch K1, which the MCU can control to open and close via circuit 5. For example, in DC charging / discharging mode, switch K1 can be controlled to open. CP1 may correspond to a first port, CP2 may correspond to a second port, circuit 1 may correspond to a first circuit, and normally closed switch K1 may correspond to a first switch.

[0118] The EVCC may also include CAN1+ and CAN1- ports, as well as CAN2+ and CAN2- ports. The EVCC can communicate with the DC controller 13 via CAN1+ and CAN1- ports; and can communicate with the CAN bus via CAN2+ and CAN2- ports. CAN2+ and CAN2- ports can correspond to the third port; CAN1+ and CAN1- ports can correspond to the fourth port.

[0119] The EVCC may include a microcontroller unit (MCU) and a PLC-CAN conversion module. For example, the MCU can connect to the CAN2+ and CAN2- ports and obtain the CC and CP states from the CAN bus. The MCU can determine whether the external charging / discharging device is fully connected based on the CC state and determine the charging type based on the CP state. As another example, the MCU can control the opening and closing of various switches in the EVCC. Furthermore, the PLC-CAN conversion module can convert between PLC signals and CAN signals. The MCU and PLC-CAN conversion module may correspond to processing unit 141.

[0120] The EVCC can be equipped with a detection point 2-E; detection point 2-E can be connected to the CP1 port via circuit 2; circuit 2 can be equipped with diode D1-E. The MCU can detect the CP status through detection point 2-E. In Figure 6, electrical components and structures in the EVCC that have similar functions to those in Figure 3 are distinguished by the suffix "-E". For example, detection point 2-E has a similar effect to detection point 2 in Figure 3; the difference lies in the controllers used for detection, which are the EVCC and controller 23, respectively. The MCU can measure the duty cycle of the PWM signal at detection point 2-E. As another example, the function of diode D1-E is similar to that of diode D1 in Figure 3.

[0121] The EVCC may include circuit 3. The CP1 port can be connected to the PLC-CAN conversion module through circuit 3, and circuit 3 can form the first communication loop.

[0122] In some embodiments, an isolation transformer may be provided in circuit 3. For example, as shown in Figure 5, the isolation transformer may be placed between the CP1 port and the PLC-CAN conversion module to provide isolation protection and filtering.

[0123] The EVCC may also include circuit 4, which can connect the detection point 2-E and the PE port of the EVCC.

[0124] In some embodiments, circuit 4 may include branch circuit 4-1 and branch circuit 4-2; branch circuit 4-1 and branch circuit 4-2 are connected in parallel. Similar to the circuit shown in Figure 3, branch circuit 4-1 may be provided with a control guide switch S2-E and a control guide resistor R2-E; branch circuit 4-2 may be provided with a resistor R3-E connected in parallel with switch S2-E and resistor R2-E. For example, in an AC charging scenario, S2-E can be controlled to be open; in a DC charging scenario, switch S2-E can be controlled to be closed. When the charging pile is connected to the vehicle, the charging pile can determine whether switch S2-E is closed based on the potential of the CP port of socket 32.

[0125] In some embodiments, branch 4-2 may be equipped with a control guide switch S2'-E. For example, when it is determined that the current charging state is DC charging, switch S2'-E can be controlled to close; when it is determined that the current charging state is AC charging, switch S2' can be controlled to open.

[0126] In this embodiment of the application, by setting the switch S2'-E, the detection of control guidance signals by the EVCC and the national standard AC controller can be made so that they do not interfere with each other.

[0127] The switches S2-E and S2'-E mentioned above can correspond to the second switch and the third switch in Figure 5, respectively; the resistors R2-E and R3-E can correspond to the first resistor and the second resistor in Figure 5, respectively.

[0128] The EVCC may also include a CC2 port. The CC2 port of the EVCC can be connected to the CC2 port of the DC controller 13. This CC2 port may correspond to the fifth port.

[0129] The EVCC may also include a resistor R4. Resistor R4 can be connected to the CC2 port of the EVCC and can function as resistor A in the analog socket 11. Resistor R4 can correspond to the third resistor.

[0130] In one embodiment, the two ends of resistor R4 can be connected to CC2 and PE of EVCC respectively via a circuit. For example, a switch can be included in this circuit. Alternatively, the MCU can control the switch to be turned on in a DC charging / discharging scenario, or it can control the switch to be turned off in an AC charging / discharging scenario.

[0131] The EVCC may also include A+ and A- ports. The A+ and A- ports of the EVCC can be connected to the A+ and A- ports of the controller 13. The A+ port of the EVCC can simulate the operation of the A+ port of the socket 11 under DC charging and discharging conditions. For example, under DC charging and discharging conditions, the A+ port of the EVCC can output a voltage of 12V.

[0132] The controller 13 can be a standalone control device or integrated into the OBC or other vehicle control units. The controller 13 may include a CC port and a CP port. The CC port of the controller 13 can be connected to the PP port of the charging / discharging socket 32, as shown in Figure 6. The CP port of the controller 13 can be connected to the CP2 port of the EVCC.

[0133] The charging / discharging socket 32 ​​may also be equipped with an electronic lock. Before charging / discharging begins, the electronic lock can lock the charging / discharging plug and remain locked throughout the energy transfer process to ensure the safety of energy transfer. Accordingly, the system 200 may include devices such as an electronic lock temperature probe to monitor the operating status of the electronic lock.

[0134] In one embodiment, when the CP1 port of the EVCC receives signal A from the CP port of socket 32 ​​(assuming signal A is a PLC signal), signal A can be transmitted to the controller 13 via the CP2 port of the EVCC through circuit 1. The controller 13 can determine whether the current charging / discharging process is an AC scenario based on signal A and can report the CC status and / or CP status. Through circuit 2, signal A can be transmitted from the CP1 port of the EVCC to the detection point 2-E of the EVCC. The EVCC can determine whether the current charging / discharging process is a DC charging mode based on signal A and / or the CC status and / or CP status reported by the controller 13. Through circuit 3, signal A can be transmitted to the isolation transformer; after conversion by the PLC-CAN conversion module, signal B in CAN communication mode can be obtained. The EVCC can send signal B to the national standard DC charging controller through the S+ and S- ports; the national standard DC charging controller can control the DC charging process based on signal B.

[0135] For example, when it is necessary to modify a Chinese standard charging and discharging system containing controllers 13 and 23 to a European standard charging and discharging system, the ports of the EVCC can be connected to controllers 13, 23, the CAN bus, and the European standard charging and discharging socket 32 ​​respectively, based on the connection method shown in Figure 6. This allows the modified charging and discharging system to meet European charging and discharging requirements without modifying controllers 13 and 23. Therefore, when exporting Chinese electric vehicles and other new energy vehicles to Europe, the modification process for the charging and discharging system can be greatly simplified, reducing development costs and the complexity of parts management.

[0136] In some possible implementations, one or more of the electrical components such as switch K1, switch S2-E, resistor R2-E, resistor R3-E, and switch S2'-E may not be included in the EVCC. Please refer to the relevant records of system 100, which will not be repeated here.

[0137] The architecture of the charging and discharging system has been illustrated above with reference to Figures 5 and 6. The charging and discharging method will now be illustrated below with reference to system 200 and Figure 7.

[0138] For example, Figure 7 is a schematic flowchart of a charging and discharging method provided in an embodiment of this application. The method 700 may include the following steps:

[0139] S701, a national standard AC charge and discharge controller, detects CC and CP status.

[0140] Since the CP port of the controller 23 can be connected to the CP port of the charging and discharging socket 32 ​​through EVCC, and the CC port of the controller 23 is connected to the PP port of the charging and discharging socket 32, when an external charging and discharging device is connected to the charging and discharging socket 32, the controller 23 can detect the CC state (such as the resistance value between the detection point 3 and PE) and the CP state (such as the duty cycle of the PWM signal) at the corresponding detection points (such as detection point 2 and detection point 3 as shown in Figure 3).

[0141] Controller 23 can report the CC status via the CAN bus. Correspondingly, BMS, VCU, and EVCC can obtain this CC status.

[0142] In some embodiments, controller 23 may also report CP status.

[0143] S702, the national standard AC charge and discharge controller 23 determines whether it is in AC charge and discharge state.

[0144] The controller 23 can determine whether the charging / discharging type is AC charging / discharging based on the detected resistance value and the duty cycle of the PWM signal. For example, when the duty cycle is 5%, the charging / discharging type can be DC charging / discharging. As another example, when the duty cycle is 8% to 97%, the charging / discharging type can be AC ​​charging / discharging. Furthermore, the correspondence between CC state and CP state and charging / discharging type can be determined by referring to Chinese standards.

[0145] If the charging / discharging type can be AC ​​charging / discharging, the process can proceed to step S703; if the charging / discharging type is not AC charging / discharging, the process can proceed to step S701.

[0146] In one embodiment, the controller 23 can monitor the CC and CP states in real time and report them via the CAN bus. When the charging / discharging type is AC charging / discharging, the controller controls the subsequent AC charging / discharging process (e.g., jumps to S703); when the charging / discharging type is not AC charging / discharging, the controller does not control the subsequent charging / discharging process.

[0147] S703, the national standard AC charge and discharge controller 23 controls the S2 switch and others to close.

[0148] In one embodiment, in an AC charging scenario, switch S2 as shown in Figure 3 can be controlled to close so that the external charging and discharging device is aware that the vehicle is ready to charge.

[0149] In another embodiment, in an AC discharge scenario, a corresponding control guide switch can be controlled to close, so that the external charging / discharging device is aware that the vehicle has discharged and is ready. For information on the control guide switch that needs to be closed in an AC discharge scenario, relevant standards can be consulted.

[0150] S704, enters the AC charging and discharging process.

[0151] For example, in a charging scenario, once the vehicle and power supply equipment are ready, the OBC can be controlled to charge the battery, and the connection status of the power supply interface and changes in the power supply capacity of the power supply equipment can be detected.

[0152] S711, EVCC receives CC status and CP status.

[0153] EVCC can obtain the CC status from the CAN bus.

[0154] For acquiring the CP status, the EVCC can acquire the CP status solely from the CAN bus, or it can acquire the CP status solely from detection point 2-E, or it can acquire the CP status from both detection point 2-E and the CAN bus (denoted as CP status 1 and CP status 2, respectively). For example, when the EVCC acquires the CP status from both the CAN bus and detection point 2-E, the CP status 1 acquired from detection point 2-E can be used to verify the CP status 2 acquired from the CAN bus, thereby improving the robustness of the system.

[0155] S712, EVCC determines whether it is in DC charging / discharging state.

[0156] For example, similar to controller 23, EVCC can determine whether the charge / discharge type is AC charge / discharge based on the CC state and CP state. For instance, the correspondence between charge / discharge type and CC and CP states can be determined based on the standard requirements of the destination.

[0157] If the charging / discharging type is not a DC charging / discharging state, the process can proceed to step S711; if the charging / discharging type is not a DC charging / discharging state, the process can proceed to step S713.

[0158] In one embodiment, the EVCC can monitor the CC and CP states in real time. When the charge / discharge type is DC charge / discharge, the subsequent DC charge / discharge process is controlled (e.g., jump to S713); when the charge / discharge type is not DC charge / discharge, the subsequent charge / discharge process is not controlled.

[0159] S713, EVCC control switch K1 is open, and control switch S2'-E is closed.

[0160] When switch K1 is in the open state, controller 23 will be unable to detect CP state, thereby avoiding interference from controller 23's detection of CP state with the DC charging and discharging process.

[0161] S714, EVCC control switch S2-E is closed.

[0162] When the vehicle has completed its self-test and is ready to charge, the EVCC can control the S2-E switch to close. An external charging / discharging device can detect the effective voltage value or a high-level voltage value at the corresponding detection point to determine if the vehicle is ready.

[0163] S715 enters the DC charging and discharging process.

[0164] For example, taking a charging scenario, in DC charging mode, after the vehicle and external power supply equipment are ready, the EVCC can inform the external power supply equipment of charging parameters such as the maximum allowable charging current and the maximum allowable charging voltage; the external power supply equipment can inform the EVCC of charging capability information such as the maximum / minimum charging voltage and the maximum / minimum charging current. The EVCC can simulate national standard interfaces and communications. For example, the aforementioned charging parameters and charging capability information can be exchanged between the EVCC and the national standard DC charge / discharge controller 13 via CAN communication. As another example, the EVCC can control the connection of resistor R4 to port CC2; the resistance value of R4 can be determined according to Chinese standard requirements.

[0165] Accordingly, controller 13 can execute step S721.

[0166] S716, EVCC determines whether the DC charging and discharging process has ended.

[0167] When the DC charging / discharging process ends, the process can jump to step S717; when the DC charging / discharging process has not ended, the process can jump to step S715.

[0168] In one embodiment, the EVCC can monitor in real time whether the charging and discharging process has ended. While the DC charging and discharging process is not yet finished, the simulation of the national standard interface and communication can continue, enabling the controller 13 to control the DC charging and discharging process; when the DC charging and discharging process ends, the process can jump to step S717.

[0169] S717, EVCC closes switch K1 and opens switch S2'-E.

[0170] The S721, a national standard DC charge and discharge controller 13, can control the DC charge and discharge process.

[0171] Figure 8 is another schematic flowchart of the charging and discharging method provided in an embodiment of this application. This method 800 can be executed by the charging and discharging communication conversion device shown in Figure 5, or by the processing unit, processor, or chip of the charging and discharging communication conversion device, or by the charging and discharging system shown in Figure 5. The method may include:

[0172] S810, obtain the first state information.

[0173] The first status information may include status information of the charging / discharging device connected to the charging / discharging socket, and this first status information may be obtained through a first port and / or a third port. For example, the first status information may include CC status and CP status.

[0174] S820 determines the charging / discharging type as DC charging / discharging or AC charging / discharging based on the first state information.

[0175] For details on how to obtain the CC and CP states and how to determine the charge / discharge type, please refer to the relevant documentation in Method 700. These details will not be repeated here.

[0176] S830 converts the first signal into the second signal during DC charging and discharging.

[0177] The first signal may include a signal input from one of the first port and the fourth port, and the second signal may include a signal output from the other of the first port and the fourth port.

[0178] For descriptions of the first port, second port, third port, fourth port, fifth port, and first circuit, please refer to the relevant records of System 100 and System 200, which will not be repeated here.

[0179] In some embodiments, the first circuit may include a first switch. The method may further include: controlling the first switch to be in a closed state during AC charging and discharging; and controlling the first switch to be in an open state during DC charging and discharging.

[0180] In some embodiments, the first branch of the second circuit is provided with a second switch, and the method may further include: controlling the second switch to be in a closed state during DC charging and discharging; and controlling the second switch to be in an open state during AC charging and discharging.

[0181] In some embodiments, a third switch is provided in the second branch of the second circuit, and the method may further include: controlling the third switch to be in a closed state in DC charging and discharging state; and controlling the third switch to be in an open state in AC charging and discharging state.

[0182] For descriptions of the second circuit, the first branch, the second branch, the second switch, and the third switch, please refer to the relevant records in System 100 and System 200.

[0183] In some embodiments, the method may further include: controlling the third resistor to be connected to the connection confirmation circuit where the fifth port is located during DC charging and discharging.

[0184] The charging and discharging method provided in this application can meet the requirements of charging and discharging standards in different regions with minimal or no modification to the national standard charging and discharging controller.

[0185] This application embodiment also provides a charge / discharge communication conversion device 140. The charge / discharge communication conversion device 140 may include: a first port, a second port, a third port, and a fourth port. The first port is used for electrical connection with the control guide port of a charge / discharge socket to form a first communication loop; the second port is used for electrical connection with the control guide port of an AC charge / discharge control device, and the charge / discharge communication conversion device further includes a first circuit connecting the second port and the first port; the third port is used for communication with a vehicle communication network; and the fourth port is used for electrical connection with the communication port of a DC charge / discharge control device to form a second communication loop.

[0186] The charge / discharge communication conversion device may further include a processing unit 141, which may be used to: determine whether the charge / discharge type is DC charge / discharge or AC charge / discharge based on first status information, wherein the first status information includes status information of the charge / discharge device connected to the charge / discharge socket, and the first status information is obtained through a first port and / or a third port; the processing unit 141 may also be used to: convert a first signal into a second signal, wherein the first signal includes a signal input from one of the first port and the fourth port, and the second signal includes a signal output from the other of the first port and the fourth port.

[0187] For a description of the charge / discharge communication conversion device 140, please refer to the relevant records of system 100, which will not be repeated here.

[0188] It should be understood that the division of units in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. All units of the above device can be implemented entirely through processor-invoked software, entirely through hardware circuits, or partially through processor-invoked software with the remaining parts implemented through hardware circuits.

[0189] In a specific implementation, the processing unit 141 can be implemented by at least one processor or processor-related circuitry. In one example, one or more processors determine the charging / discharging type as DC charging / discharging or AC charging / discharging based on the first state information. In another example, one or more processors convert the first signal into a second signal. For instance, the function of the processing unit 141 can be implemented by the MCU and PLC-CAN communication conversion module of the EVCC in Figure 6.

[0190] For example, FIG9 is a schematic block diagram of another device 3000 provided in an embodiment of this application. The device 3000 may include a processor 3010, an interface circuit 3020, and a memory 3030. The processor 3010, interface circuit 3020, and memory 3030 are connected via internal connection paths. The memory 3030 is used to store instructions, and the processor 3010 is used to execute the instructions stored in the memory 3030, so that the interface circuit 3020 can receive / send some parameters. Optionally, the memory 3030 may be coupled to the processor 3010 via an interface, or it may be integrated with the processor 3010.

[0191] It should be noted that the aforementioned interface circuit 3020 may include, but is not limited to, transceiver devices such as input / output interfaces, to enable communication between device 3000 and other devices. For example, the interface circuit 3020 can be used to obtain first status information, and / or receive a first signal and / or send a second signal.

[0192] This application also provides a computer program product, which includes computer program code that, when run on a computer, causes the computer to execute any of the method embodiments in Figures 7 to 8 above, and any possible implementation thereof.

[0193] This application also provides a computer-readable storage medium storing program code or instructions that, when executed by a computer's processor, cause the processor to implement any of the method embodiments in Figures 7 to 8 above, and any possible implementation thereof.

[0194] This application also provides a chip, including a circuit, for executing any of the method embodiments in Figures 7 to 8 above, and any possible implementation thereof.

[0195] This application embodiment also provides an intelligent driving device, which may include the above-mentioned charge-discharge communication conversion device, or may include device 3000, or may include charge-discharge system 100.

[0196] For example, the intelligent driving device can be a vehicle. The vehicle involved in this application embodiment is a vehicle in a broad sense, which can be a means of transportation (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), amusement equipment, toy vehicles, etc. For example, the vehicle in this application can include pure electric vehicles (pure electric vehicle / battery electric vehicle, pure EV / battery EV), hybrid electric vehicles (HEV), range-extended electric vehicles (REEV), plug-in hybrid electric vehicles (PHEV), or new energy vehicles (NEV), etc.

[0197] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0198] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0199] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0200] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0201] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0202] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0203] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A charge / discharge communication conversion device, characterized in that, The charging and discharging communication conversion device comprises a first port, a second port, a third port and a fourth port, The first port is used for electrical connection with a control guide port of a charging and discharging socket to form a first communication loop; The second port is used for electrical connection with a control guide port of an alternating current charging and discharging control device, and the charging and discharging communication conversion device further comprises a first circuit connecting the second port and the first port; The third port is used for communication with a vehicle communication network; The fourth port is used for electrical connection with a communication port of a direct current charging and discharging control device to form a second communication loop; The charging and discharging communication conversion device further comprises a processing unit, The processing unit is used for determining the charging and discharging type as direct current charging and discharging or alternating current charging and discharging according to first state information, the first state information comprises state information of a charging and discharging device connected with the charging and discharging socket, and the first state information is acquired through the first port and / or the third port; The processing unit is further used for converting a first signal into a second signal, the first signal comprises a signal input by one of the first port and the fourth port, and the second signal comprises a signal output by the other one of the first port and the fourth port.

2. The charge-discharge communication conversion device according to claim 1, wherein The first circuit is provided with a first switch.

3. The charging and discharging communication conversion device according to claim 2, wherein, in the alternating current charging and discharging state, the first switch is in a closed state; in the direct current charging and discharging state, the first switch is in an open state.

4. The charge-discharge communication conversion device according to any one of claims 1 to 3, characterized by The charging and discharging communication conversion device further comprises a grounding protection port, and the first port is connected with the grounding protection port through a second circuit; The second circuit comprises a first branch provided with a second switch and a first resistor, and a second branch connected with the second switch and the first resistor in parallel, and the second branch is provided with a second resistor.

5. The charging and discharging communication conversion device according to claim 4, wherein, in the direct current charging and discharging state, the second switch is in a closed state; in the alternating current charging and discharging state, the second switch is in an open state.

6. The charge-discharge communication conversion device according to claim 4 or 5, wherein The second branch is provided with a third switch.

7. The charging and discharging communication conversion device according to claim 6, wherein, in the direct current charging and discharging state, the third switch is in a closed state; in the alternating current charging and discharging state, the third switch is in an open state.

8. The charging and discharging communication conversion device according to claim 6 or 7, wherein, the processing unit is further used for controlling the third switch to be closed and then controlling the second switch to be closed when determining the charging and discharging type as direct current charging and discharging.

9. The charge-discharge communication conversion device according to any one of claims 6 to 8, wherein The third switch is a normally open switch.

10. The charge-discharge communication conversion device according to any one of claims 2 to 9, wherein The first switch is a normally closed switch.

11. The charge-discharge communication conversion device according to any one of claims 1 to 10, wherein The charging and discharging communication conversion device further comprises a fifth port used for connection with a connection confirmation port of the direct current charging and discharging control device.

12. The charging and discharging communication conversion device according to claim 11, wherein, the processing unit is further used for controlling a third resistor to be connected to a connection confirmation loop in which the fifth port is located in the direct current charging and discharging state.

13. The charge-discharge communication conversion device according to any one of claims 1 to 12, characterized by The first state information includes a connection confirmation state of the charging and discharging device, The connection confirmation port of the AC charging and discharging control device is connected with the connection confirmation port of the charging and discharging socket, and the AC charging and discharging control device is configured to report the connection confirmation state.

14. A charge-discharge method characterized by comprising: Comprise: Obtaining first state information, the first state information includes state information of a charging and discharging device connected with a charging and discharging socket, and the first state information is obtained through a first port and / or a third port; According to the first state information, determine that the charging and discharging type is direct current charging and discharging or alternating current charging and discharging; In the direct current charging and discharging state, the first signal is converted into the second signal, the first signal includes the signal input by one of the first port and the fourth port, and the second signal includes the signal output by the other of the first port and the fourth port; The first port is used for electrical connection with a control guide port of the charging and discharging socket to form a first communication loop; the second port is used for electrical connection with a control guide port of the AC charging and discharging control device, and the second port is connected with the first port through a first circuit; the third port is used for communication with a vehicle communication network; and the fourth port is used for electrical connection with a communication port of the direct current charging and discharging control device to form a second communication loop.

15. The method of claim 14, wherein, The first circuit is provided with a first switch, and the method further comprises: In the alternating current charging and discharging state, the first switch is controlled to be in a closed state; or In the direct current charging and discharging state, the first switch is controlled to be in an open state.

16. The method according to claim 14 or 15, characterized in that The first port is connected with a ground protection port through a second circuit, and the second circuit comprises: a first branch provided with a second switch and a first resistor, and a second branch connected with the second switch and the first resistor in parallel, and the second branch is provided with a second resistor; The method further comprises: In the direct current charging and discharging state, the second switch is controlled to be in a closed state; or In the alternating current charging and discharging state, the second switch is controlled to be in an open state.

17. The method of claim 16, wherein, The second branch is provided with a third switch, and the method further comprises: In the direct current charging and discharging state, the third switch is controlled to be in a closed state; or In the alternating current charging and discharging state, the third switch is controlled to be in an open state.

18. The method of claim 17, wherein, The method further comprises: When it is determined that the charging and discharging type is direct current charging and discharging, the third switch is first controlled to be closed, and then the second switch is controlled to be closed.

19. The method of claim 17 or 18, wherein, The third switch is a normally open switch.

20. The method of any one of claims 15-19, wherein, The first switch is a normally closed switch.

21. The method according to any one of claims 14 to 20, characterized in that, The method further comprises: In the direct current charging and discharging state, a third resistor is connected to a connection confirmation loop in which a fifth port is located, and the fifth port is used for connection with a connection confirmation port of the direct current charging and discharging control device.

22. The method of any one of claims 14 to 21, wherein, The first state information includes a connection confirmation state of the charging and discharging device, 23. A charge-discharge system characterized by comprising: Comprise: a charging and discharging socket, an AC charging and discharging control device and a direct current charging and discharging control device, and the charging and discharging communication conversion device according to any one of claims 1 to 13.

24. A vehicle characterized by comprising: The charging and discharging communication conversion device as claimed in any one of claims 1 to 13, or the charging and discharging system as claimed in claim 24.

25. A computer program product, characterised in that, The computer program product comprises computer program code which, when the computer program code is run on a computer, causes the computer to implement the method as claimed in any one of claims 14 to 22.

26. A computer-readable storage medium, characterized in that, An instruction is stored on the computer, and the instruction is executed by the processor to cause the processor to implement the method as claimed in any one of claims 14 to 22.

27. A chip, characterized by The chip comprises a circuit, and the circuit is used to execute the method as claimed in any one of claims 14 to 22.

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