Relay anti-adhesion method, device, charging pile, electric vehicle and medium

Abstract

The present application relates to the field of new energy vehicle technology, and more particularly to a relay anti-sticking method, device, charging pile, electric vehicle, and medium. The method comprises: obtaining the current battery voltage value transmitted when the electric vehicle completes charging; adjusting the charging voltage of the charging pile to the current battery voltage value, and generating a first preset message after the charging voltage adjustment of the charging pile is completed; and sending the first preset message to the electric vehicle, wherein the electric vehicle disconnects the relay in the charging circuit of the electric vehicle after receiving the first preset message. This method solves the problem of relay sticking, which may pose a safety hazard and lead to safety accidents.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and in particular to a relay anti-adhesion method, device, charging pile, electric vehicle, and medium. Background Art

[0002] The new energy vehicle industry is booming. Battery systems are the power source for these vehicles, making charging technology crucial. Relays are typically used as switches in electric vehicle charging circuits. When charging is complete, the relays must disconnect promptly to ensure user safety. However, due to the voltage and current applied to the contacts, load type, and other factors, relays can become stuck, potentially causing safety incidents.

[0003] Currently, automotive battery charging follows a fixed charging logic. Under this logic, if the battery charge is still low during the charging process, charging is terminated. During this period, the charging current and voltage are still high, and the voltage across the relay and the current flowing through the relay are also high, making it more likely that the relay contacts will stick when disconnected. Currently, preventing relay sticking relies primarily on the relay's inherent performance, coupled with a detection circuit to determine if the relay is sticking. Summary of the Invention

[0004] The present application provides a relay anti-adhesion method, device, charging pile, electric vehicle and medium to solve the problems of relay adhesion causing potential safety hazards and leading to safety accidents.

[0005] The first aspect of the present application provides an anti-adhesion method for a relay, which is applied to a charging pile and includes the following steps: obtaining the current voltage value of the battery sent when the electric vehicle is finished charging; adjusting the charging voltage of the charging pile to the current voltage value of the battery, and generating a first preset message after the charging voltage adjustment of the charging pile is completed; sending the first preset message to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

[0006] According to the above technical means, the embodiment of the present application can obtain the current battery voltage value after the electric vehicle is charged, and adjust the charging voltage of the charging pile to be consistent with it. After the electric vehicle receives the message after the adjustment of the charging pile is completed, the relay of the charging circuit on the electric vehicle is disconnected, thereby preventing the relay from sticking by adjusting the charging voltage when charging is stopped, thereby reducing safety hazards.

[0007] Optionally, after sending the first preset message to the electric vehicle, the method further includes: obtaining a second preset message for the electric vehicle to disconnect the charging circuit; and disconnecting the relay of the charging circuit on the charging pile after receiving the second preset message.

[0008] According to the above technical means, the embodiment of the present application can obtain the message sent to the charging pile after the electric vehicle is disconnected from charging, and at the same time disconnect the relay of the charging circuit on the charging pile to prevent the relay from sticking.

[0009] Optionally, obtaining the current voltage value of the battery sent when the electric vehicle finishes charging includes: after receiving the charging completion message sent by the electric vehicle, sending a voltage acquisition request to the electric vehicle, wherein the electric vehicle obtains the current voltage value of the battery based on the voltage acquisition request; and obtaining the current voltage value of the battery sent by the electric vehicle.

[0010] According to the above technical means, the embodiment of the present application can send voltage acquisition to the electric vehicle after the charging pile receives the message that the charging of the electric vehicle is completed, and obtain the current voltage value of the electric vehicle battery, so as to subsequently adjust the voltage value of the charging pile, so that the voltage difference between the two ends of the relay and the current flowing through are close to 0, thereby greatly reducing the relay adhesion failure.

[0011] A second aspect of the present application provides an anti-adhesion method for a relay, which is applied to an electric vehicle and includes the following steps: sending a charging end message to a charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; obtaining the current voltage value of the battery according to the voltage acquisition request of the charging pile, and sending the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then sending a first preset message to the electric vehicle; after receiving the first preset message, disconnecting the relay of the charging circuit on the electric vehicle.

[0012] Optionally, after disconnecting the relay of the charging circuit on the electric vehicle, the method further includes: sending a second preset message to a charging pile, wherein the charging pile disconnects the relay of the charging circuit on the charging pile after receiving the second preset message.

[0013] In a third aspect, an embodiment of the present application provides an anti-adhesion device for a relay, which is applied to a charging pile and includes: an acquisition module for acquiring the current voltage value of the battery sent when the electric vehicle finishes charging; an adjustment module for adjusting the charging voltage of the charging pile to the current voltage value of the battery, and generating a first preset message after the charging voltage of the charging pile is adjusted; a first sending module for sending the first preset message to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

[0014] The fourth aspect of the present application provides an anti-adhesion device for a relay, which is applied to an electric vehicle and includes: a second sending module for sending a charging end message to a charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; a third sending module for obtaining the current voltage value of the battery according to the voltage acquisition request of the charging pile, and sending the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then sends a first preset message to the electric vehicle; a receiving module for disconnecting the relay of the charging circuit on the electric vehicle after receiving the first preset message.

[0015] The fifth aspect of the present application provides a charging pile, comprising: a first charging circuit, wherein the first charging circuit includes a relay, and the relay is used to control the conduction and cutoff of the first charging circuit; a control module, used to obtain the current voltage value of the battery sent when the electric vehicle is finished charging; adjust the charging voltage of the charging pile to the current voltage value of the battery, and generate a first preset message after the charging voltage adjustment of the charging pile is completed; send the first preset message to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

[0016] The sixth aspect of the present application provides an electric vehicle, comprising: a second charging circuit, wherein the second charging circuit comprises a relay, and the relay is used to control the conduction and cutoff of the second charging circuit; a vehicle controller, sending a charging end message to a charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; acquiring the current voltage value of the battery according to the voltage acquisition request of the charging pile, and sending the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then sending a first preset message to the electric vehicle; after receiving the first preset message, disconnecting the relay of the second charging circuit.

[0017] The seventh aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the anti-adhesion method of the relay as described in the above embodiment.

[0018] Therefore, this application has at least the following beneficial effects:

[0019] The embodiment of the present application can obtain the current battery voltage value after the electric vehicle is charged, adjust the charging voltage of the charging pile to be consistent with it, and after the electric vehicle receives the message after the charging pile adjustment is completed, the relay of the charging circuit on the electric vehicle is disconnected, thereby preventing the relay from sticking by adjusting the charging voltage when charging is stopped, thereby reducing safety hazards; the message sent to the charging pile by the electric vehicle after the charging is disconnected can be obtained, and the relay of the charging circuit on the charging pile is also disconnected, thereby preventing the relay from sticking; after the charging pile receives the message that the electric vehicle is charged, it can send the voltage acquisition to the electric vehicle to obtain the current voltage value of the electric vehicle battery, so as to subsequently adjust the voltage value of the charging pile, so that the voltage difference between the two ends of the relay and the current flowing through are close to 0, thereby greatly reducing the possibility of relay sticking.

[0020] This solves the technical problems that relays may become stuck, causing safety hazards and leading to safety accidents.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of a DC charging control circuit according to an embodiment of the present application;

[0024] Figure 2 Flowchart of a relay anti-adhesion method according to an embodiment of the present application;

[0025] Figure 3 This is a flow chart of a relay anti-adhesion method provided according to another embodiment of the present application;

[0026] Figure 4 A schematic diagram of a charging process according to an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the charging end process according to an embodiment of the present application;

[0028] Figure 6This is an example diagram of an anti-adhesion device for a relay provided according to an embodiment of the present application;

[0029] Figure 7 This is an exemplary diagram of an anti-adhesion device for a relay provided according to another embodiment of the present application;

[0030] Figure 8 A schematic diagram of the structure of a charging pile provided according to an embodiment of the present application;

[0031] Figure 9 The figure is a schematic diagram of the structure of an electric vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0033] The following describes the anti-adhesion method, device, charging pile, electric vehicle and medium of the relay of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the relay mentioned in the above background technology may be stuck due to the voltage and current applied to the contacts, the load type and other issues, thereby causing safety accidents, the present application provides an anti-adhesion method for the relay, in which, after charging is completed, the charging pile communicates with the electric vehicle control system, sends charging information, and adjusts the charging voltage according to the real-time voltage of the battery sent by the BMS (Battery Management System) system. After the adjustment is completed, the relay on the charging circuit is disconnected, so that the voltage difference between the two ends of the relay and the current flowing through are nearly 0, thereby reducing the possibility of relay adhesion. Thus, the problem that the relay may be stuck and bring safety hazards, leading to safety accidents, etc. is solved.

[0034] Before describing the anti-sticking method of the relay of the present application in detail, the principle of the DC charging control circuit used in the present application is first introduced. Figure 1 As shown, the DC charging pile includes a power module, a diode D1, relays K1 and K2, an auxiliary power module, relays K3 and K4, a control module, a resistor R1, and a power supply U1; the vehicle interface includes a switch S, resistors R2, R3, and R4; and the electric vehicle includes a battery, relays K5 and K6, a vehicle controller, a resistor R5, and a power supply U2.

[0035] Among them, the power module can convert AC power into DC power to charge the electric vehicle battery, and can adjust the charging voltage and charging current according to the charging strategy to charge the battery more efficiently and safely; diode D1 is an anti-reverse diode to prevent reverse current flow; the auxiliary power module can provide 12V voltage to power the main control unit, display module, information acquisition module and other control systems on the charging pile, and also power the BMS system on the electric vehicle; relays K3 and K4 are auxiliary power supply circuit switches for the BMS (Battery Management System) system on the electric vehicle; the control module is the control module of the charging pile, including the information acquisition module, the electric vehicle communication module, the relay drive module and other control systems; the power supply U1 is the auxiliary voltage of the charging pile, which provides a pull-up power supply for the charging pile to detect connectivity; resistors R1, R2, R4, and switch S are charging connection devices for the charging pile to detect charging, R1 is a pull-up resistor, S is a mechanical lock, and R2 and R4 are voltage divider resistors. When the charging gun is on the charging pile, the mechanical lock is in the locked state, that is, S is closed, R1 and R2 form a voltage divider circuit, and the control system of the charging pile detects a voltage value; when the mechanical lock of the charging gun is pressed, S is disconnected, and the control system of the charging pile detects a voltage U1; when the charging gun is inserted into the charging base, S is still disconnected, R1 and R4 form a voltage divider circuit, and the control system of the charging pile detects a voltage value; release the mechanical lock button, and R1, R4 and R2 form a voltage divider circuit, and the control system of the charging pile detects another voltage value. At this time, the charging pile determines that the connection is normal; the charging pile determines whether the charging gun is connected to the electric vehicle based on the detected voltage value; the battery is the battery of the electric vehicle, which provides energy for the electric vehicle; relays K5 and K6 are the charging circuit switches on the electric vehicle; the vehicle controller is the charging control circuit on the electric vehicle, including insulation detection, total voltage acquisition, AFE (Analog Front End, battery sampling chip) and other control circuits; the power supply U2 is the low-voltage power supply of the electric vehicle, which provides a pull-up power supply for the electric vehicle to detect connectivity; resistors R3 and R5 are devices for the electric vehicle to detect charging connections, R5 is a pull-up resistor, and R3 is a voltage divider resistor; when the charging gun is not connected, the voltage detected by the electric vehicle controller is U2. After the charging gun is connected, the voltage value detected by the electric vehicle is the voltage value after the voltage is divided by R3 and R5. The electric vehicle determines whether the charging gun is connected based on the detected voltage value; the DC+ and DC- ports are charging ports; the S+ and S- ports are CAN (Controller Area Network) communication ports; the GND port is the grounding protection port; the CC1 port is the charging pile charging connection confirmation port; the A+ and A- ports are auxiliary power ports; after the charging pile has confirmed the connection, the charging handshake and the charging parameters are configured, it will officially start charging the electric vehicle battery.

[0036] When the battery power is low, the constant current charging mode is generally used, with a large charging current, which can charge quickly. When the battery power reaches a certain level, the constant voltage charging mode is generally used, and the charging process is closer to the optimal charging curve, avoiding overcharging. When the battery power is still relatively low, the user stops charging. At this time, the charging pile is still in the constant current charging mode, and the current flowing through the relay is still relatively large. If the relay is disconnected at this time, the possibility of the relay contacts sticking will be greater. Therefore, this application proposes a method for preventing relay sticking, that is, to prevent relay sticking by adjusting the charging voltage when charging is stopped.

[0037] Specifically, Figure 2 A flow chart of the relay anti-adhesion method provided in an embodiment of the present application.

[0038] like Figure 2 As shown, the anti-adhesion method of the relay is applied to the charging pile, including the following steps:

[0039] In step S101 , the current voltage value of the battery sent when the electric vehicle is finished charging is acquired.

[0040] Among them, the battery is the battery of the electric vehicle, which provides energy for the electric vehicle.

[0041] It should be noted that the existing way to end charging is to swipe a card, use an APP, or press a button on the charging gun.

[0042] In an embodiment of the present application, obtaining the current voltage value of the battery sent when the electric vehicle finishes charging includes: after receiving the charging end message sent by the electric vehicle, sending a voltage acquisition request to the electric vehicle, wherein the electric vehicle obtains the current voltage value of the battery based on the voltage acquisition request.

[0043] It can be understood that after receiving the charging end message sent by the electric vehicle, the charging pile in the embodiment of the present application communicates with the electric vehicle control system and sends a voltage acquisition request to the electric vehicle. The electric vehicle obtains the current voltage value of the battery based on the acquisition request.

[0044] In step S102, the charging voltage of the charging pile is adjusted to the current voltage value of the battery, and a first preset message is generated after the charging voltage of the charging pile is adjusted.

[0045] The first preset message may be a message sent after the voltage is adjusted to a suitable voltage, and the message may be transmitted via a CAN bus.

[0046] It is understandable that the embodiment of the present application can adjust the charging voltage of the charging pile to the current voltage value of the battery after charging is completed, and generate a first preset message after the charging voltage of the charging pile is adjusted.

[0047] In step S103, a first preset message is sent to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

[0048] It can be understood that the embodiment of the present application generates a first preset message after adjusting the charging voltage of the charging pile in step S102 to the current voltage value of the battery, and sends the first preset message to the electric vehicle, and the electric vehicle disconnects the relay on the charging circuit of the charging pile.

[0049] In an embodiment of the present application, after sending the first preset message to the electric vehicle, it also includes: obtaining a second preset message for the electric vehicle to disconnect the charging circuit; after receiving the second preset message, disconnecting the relays K1 and K2 of the charging circuit on the charging pile.

[0050] The second preset message is a message received by the relay that disconnects the charging circuit of the electric vehicle, and may be a charging voltage value sent by the charging pile.

[0051] It can be understood that in the embodiment of the present application, after sending the first preset message to the electric vehicle, after the electric vehicle receives the charging voltage value (second preset message) sent by the charging pile, the electric vehicle controller drive module turns off the charging circuit relays K5 and K6. Therefore, when the relay is cut off, the pressure difference across the relay and the current flowing through are almost 0, which can greatly reduce the relay adhesion failure.

[0052] According to the anti-sticking method of the relay proposed in the embodiment of the present application, the current battery voltage value can be obtained after the charging of the electric vehicle is completed, and the charging voltage of the charging pile can be adjusted to be consistent with it. After the electric vehicle receives the message after the adjustment of the charging pile is completed, the relay of the charging circuit on the electric vehicle is disconnected, thereby preventing the relay from sticking by adjusting the charging voltage when charging is stopped, thereby reducing safety hazards; the message sent to the charging pile by the electric vehicle after the charging is disconnected can be obtained, and the relay of the charging circuit on the charging pile is also disconnected, thereby preventing the relay from sticking; after the charging pile receives the message that the charging of the electric vehicle is completed, the voltage can be sent to the electric vehicle to obtain the current voltage value of the battery of the electric vehicle, so as to subsequently adjust the voltage value of the charging pile so that the voltage difference between the two ends of the relay and the current flowing through are close to 0, thereby greatly reducing the possibility of relay sticking.

[0053] Figure 3 A schematic flow chart of a relay anti-adhesion method provided in an embodiment of the present application.

[0054] like Figure 3 As shown, the anti-adhesion method of the relay is applied to electric vehicles and includes the following steps:

[0055] In step S201, a charging completion message is sent to the charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging completion message.

[0056] It is understandable that, in the embodiment of the present application, after the electric vehicle is charged, a charging completion message can be sent to the charging pile, and the charging pile can send a voltage acquisition request to the electric vehicle to obtain the current voltage value of the battery.

[0057] In step S202, the current voltage value of the battery is obtained according to the voltage acquisition request of the charging pile, and the current voltage value is sent to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then a first preset message is sent to the electric vehicle.

[0058] The first preset message has been described in the above embodiment and will not be repeated here.

[0059] It can be understood that the embodiment of the present application can obtain the current voltage value of the battery according to the voltage request of the charging pile, send the voltage value to the charging pile, adjust the charging pile to the corresponding voltage value, and send a first preset message to the electric vehicle after the adjustment is completed.

[0060] In step S203, after receiving the first preset message, the relay of the charging circuit on the electric vehicle is disconnected.

[0061] It can be understood that after the battery management system BMS system of the electric vehicle in the embodiment of the present application receives the first preset message sent by the charging pile, the electric vehicle controller drives the module to disconnect the relay of the charging circuit on the electric vehicle.

[0062] Specifically, the charging process in the anti-adhesion method of the relay described in this application is as follows: Figure 4 As shown, the details are as follows:

[0063] 1. Physical connection completed: When the car starts charging, the physical connection is completed first. That is, the vehicle BMS side confirms the CC2 connection, and the charging pile side confirms the CC1 connection;

[0064] 2. Low-voltage auxiliary power-on: After the user inserts the gun and swipes the card, the charging pile provides a 12V voltage signal to the car, thereby waking up the car's BMS controller;

[0065] 3. Charging handshake phase: The charging pile sends a handshake message CHM and the charging protocol version to the car's BMS system. The BMS also sends a handshake message and the maximum total voltage allowed by the vehicle to the charging pile. After the two parties have shaken hands, the charging pile performs a self-check and sends CRM00 to the BMS. After receiving the message, the BMS will send a BRM identification message to the charging pile. After receiving the information, the charging pile will analyze and decide whether to charge the car. If the information is correct, charging can be done and the BMS system will reply CRM AA. If the information does not match, charging cannot be done and an error message will be sent to the BMS system. The charging handshake is completed;

[0066] 4. Parameter matching stage: After the charging pile sends the identification matching message, the BMS closes the K1 and K2 relays to connect the charging circuit. At the same time, the vehicle performs insulation testing, which is continuously performed during the charging process. After the insulation test is successful, it sends a charging ready message. The charging pile closes the relay on the charging pile line to connect the DC charging circuit.

[0067] 5. Charging stage: After charging begins, the BMS system sends charging requirements to the charging pile in real time. The charging pile adjusts the charging voltage and charging current in real time based on the received charging requirements. In addition, the charging pile and the BMS system also send each other their status information;

[0068] 6. Charging end stage: In the existing charging mode, when charging is ended by swiping a card, APP, or pressing a button on the charging gun, the BMS and the charging pile send the charging process to each other and cut off the relay to disconnect the charging circuit.

[0069] According to the anti-adhesion device of the relay proposed in the embodiment of the present application, the charging end process in the present application is as follows Figure 5 As shown, the charging pile first receives the charging end signal and then communicates with the electric vehicle control system to transmit charging progress information. Simultaneously, regardless of the charging mode the charging pile is currently in, it adjusts the charging voltage to the current battery voltage based on the real-time battery voltage transmitted by the BMS system. The current charging voltage is then transmitted to the electric vehicle control system. Relays K1 and K2 on the charging pile's charging circuit are then disconnected. After the electric vehicle receives the charging voltage signal from the charging pile, the electric vehicle controller driver module turns off relays K5 and K6 on the charging circuit.

[0070] According to the anti-sticking method of the relay proposed in the embodiment of the present application, the electric vehicle sends a charging end message to the charging pile after charging is completed, so that the charging pile obtains the current voltage value of the battery, and adjusts the voltage of the charging pile to make it consistent. After the adjustment is completed, the relay is cut off, and the voltage difference across the relay and the current flowing through are almost 0, thereby reducing the probability of relay sticking.

[0071] Next, the anti-adhesion device for a relay proposed in accordance with an embodiment of the present application will be described with reference to the accompanying drawings.

[0072] Figure 6 and Figure 7 Schematic diagram of the anti-adhesion device of the relay according to the embodiment of the present application.

[0073] like Figure 6 As shown, the relay anti-adhesion device 10 is applied to a charging pile, and includes: an acquisition module 101, an adjustment module 102 and a first sending module 103.

[0074] Among them, the acquisition module 101 is used to obtain the current voltage value of the battery sent when the electric vehicle finishes charging; the adjustment module 102 is used to adjust the charging voltage of the charging pile to the current voltage value of the battery, and generate a first preset message after the charging voltage adjustment of the charging pile is completed; the first sending module 103 is used to send the first preset message to the electric vehicle, wherein, after receiving the first preset message, the electric vehicle disconnects the relay of the charging circuit on the electric vehicle.

[0075] According to the anti-sticking device of the relay proposed in the embodiment of the present application, the current battery voltage value can be obtained after the charging of the electric vehicle is completed, and the charging voltage of the charging pile can be adjusted to be consistent with it. After the electric vehicle receives the message after the adjustment of the charging pile is completed, the relay of the charging circuit on the electric vehicle is disconnected, thereby preventing the relay from sticking by adjusting the charging voltage when charging is stopped, thereby reducing safety hazards; the message sent to the charging pile by the electric vehicle after the charging is disconnected can be obtained, and the relay of the charging circuit on the charging pile is also disconnected, thereby preventing the relay from sticking; after the charging pile receives the message that the charging of the electric vehicle is completed, the voltage can be sent to the electric vehicle to obtain the current voltage value of the battery of the electric vehicle, so as to subsequently adjust the voltage value of the charging pile so that the voltage difference between the two ends of the relay and the current flowing through are close to 0, thereby greatly reducing the possibility of relay sticking.

[0076] like Figure 7 As shown, the anti-adhesion device 20 of the relay is applied to an electric vehicle, and includes: a second sending module 201 , a third sending module 202 and a receiving module 203 .

[0077] Among them, the second sending module 201 is used to send a charging end message to the charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; the third sending module 202 is used to obtain the current voltage value of the battery according to the voltage acquisition request of the charging pile, and send the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then sends the first preset message to the electric vehicle; the receiving module 203 is used to disconnect the relay of the charging circuit on the electric vehicle after receiving the first preset message.

[0078] It should be noted that the above explanation of the embodiment of the anti-adhesion method for a relay is also applicable to the anti-adhesion device for a relay in this embodiment, and will not be repeated here.

[0079] According to the anti-sticking device of the relay proposed in the embodiment of the present application, the electric vehicle sends a charging end message to the charging pile after charging is completed, so that the charging pile obtains the current voltage value of the battery, and adjusts the voltage of the charging pile to make it consistent. After the adjustment is completed, the relay is cut off, and the voltage difference across the relay and the current flowing through are almost 0, thereby reducing the probability of relay sticking.

[0080] Figure 8 This is a schematic diagram of the structure of a charging pile provided in an embodiment of the present application. The charging pile 30 includes: a first charging circuit 301 and a control module 302.

[0081] Among them, the first charging circuit 301 includes a relay, which is used to control the conduction and cutoff of the first charging circuit; the control module 302 is used to obtain the current voltage value of the battery sent when the electric vehicle finishes charging; adjust the charging voltage of the charging pile to the current voltage value of the battery, and generate a first preset message after the charging voltage adjustment of the charging pile is completed; send the first preset message to the electric vehicle, wherein, after receiving the first preset message, the electric vehicle disconnects the relay of the charging circuit on the electric vehicle.

[0082] Specifically, the first charging circuit 301 is the charging circuit on the charging pile, and the relay is the charging circuit switch on the charging pile, which can control the conduction and cutoff of the first charging circuit; the control module 302 is the control module of the charging pile, including an information acquisition module, an electric vehicle communication module, a relay drive module and other control systems.

[0083] It can be understood that the control module on the charging pile can obtain the current voltage value of the battery sent when the electric vehicle finishes charging, adjust the charging voltage of the charging pile to be consistent with it, and after the adjustment is completed, send the first preset message of adjustment completion to the electric vehicle, so that the electric vehicle disconnects the relay on the charging circuit.

[0084] Figure 9 This is a schematic diagram of the structure of an electric vehicle provided in an embodiment of the present application. The electric vehicle 40 includes: a second charging circuit 401 and a vehicle controller 402.

[0085] Among them, the second charging circuit 401 includes a relay, which is used to control the conduction and cutoff of the second charging circuit; the vehicle controller 402 sends a charging end message to the charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; the current voltage value of the battery is obtained according to the voltage acquisition request of the charging pile, and the current voltage value is sent to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then a first preset message is sent to the electric vehicle; after receiving the first preset message, the relay of the second charging circuit is disconnected.

[0086] Specifically, the second charging circuit is the charging circuit on the electric vehicle, and the relay is the charging circuit switch on the electric vehicle, which can control the conduction and cutoff of the second charging circuit; the vehicle controller is the charging control electric oven on the electric vehicle, including insulation detection, total voltage acquisition, AFE and other control circuits.

[0087] It can be understood that the vehicle controller of the embodiment of the present application can send a charging end message to the charging pile, the charging pile obtains the current voltage value of the battery, and adjusts the voltage value of the charging pile to be consistent with the current voltage value of the battery. After the adjustment is completed, a first preset message is sent to the electric vehicle to disconnect the relay on the second charging circuit.

[0088] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned anti-adhesion method for relays.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations 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 any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0091] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0092] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0093] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for preventing adhesion of a relay, characterized in that: The method is applied to a charging pile, wherein the method comprises the following steps: Get the current voltage value of the battery sent when the electric vehicle is finished charging; Adjusting the charging voltage of the charging pile to the current voltage value of the battery, and generating a first preset message after the charging voltage of the charging pile is adjusted; The first preset message is sent to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

2. The method according to claim 1, characterized in that After sending the first preset message to the electric vehicle, the method further includes: Obtaining a second preset message for disconnecting the charging circuit of the electric vehicle; After receiving the second preset message, the relay of the charging circuit on the charging pile is disconnected.

3. The method according to claim 1, characterized in that The method of obtaining the current voltage value of the battery sent when the electric vehicle is finished charging includes: After receiving the charging completion message sent by the electric vehicle, sending a voltage acquisition request to the electric vehicle, wherein the electric vehicle acquires the current voltage value of the battery based on the voltage acquisition request; Obtain the current voltage value of the battery sent by the electric vehicle.

4. A method for preventing adhesion of a relay, characterized in that: The method is applied to an electric vehicle, wherein the method comprises the following steps: Sending a charging end message to a charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; Acquire the current voltage value of the battery according to the voltage acquisition request of the charging pile, and send the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then send a first preset message to the electric vehicle; After receiving the first preset message, the relay of the charging circuit on the electric vehicle is disconnected.

5. The method according to claim 4, characterized in that After disconnecting the relay of the charging circuit on the electric vehicle, the method further includes: A second preset message is sent to the charging pile, wherein the charging pile disconnects the relay of the charging circuit on the charging pile after receiving the second preset message.

6. A relay anti-adhesion device, characterized in that: The device is applied to a charging pile, wherein the device comprises: An acquisition module is used to obtain the current voltage value of the battery sent when the electric vehicle is finished charging; an adjustment module, configured to adjust the charging voltage of the charging pile to the current voltage value of the battery, and generate a first preset message after the charging voltage of the charging pile is adjusted; The first sending module is configured to send the first preset message to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

7. A relay anti-adhesion device, characterized in that: The device is applied to an electric vehicle, wherein the device comprises: A second sending module is configured to send a charging end message to a charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; a third sending module, configured to obtain a current voltage value of the battery according to the voltage acquisition request of the charging pile, and send the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then send a first preset message to the electric vehicle; The receiving module is used to disconnect the relay of the charging circuit on the electric vehicle after receiving the first preset message.

8. A charging pile, characterized in that: include: A first charging circuit, wherein the first charging circuit includes a relay, and the relay is used to control the conduction and cutoff of the first charging circuit; A control module is used to obtain the current voltage value of the battery sent when the electric vehicle is finished charging; adjust the charging voltage of the charging pile to the current voltage value of the battery, and generate a first preset message after the charging voltage of the charging pile is adjusted; and send the first preset message to the electric vehicle, wherein the electric vehicle disconnects the relay of the charging circuit on the electric vehicle after receiving the first preset message.

9. An electric vehicle, characterized in that: include: A second charging circuit, wherein the second charging circuit includes a relay, and the relay is used to control the conduction and cutoff of the second charging circuit; A vehicle controller sends a charging end message to a charging pile, wherein the charging pile sends a voltage acquisition request to the electric vehicle after receiving the charging end message; obtains the current voltage value of the battery according to the voltage acquisition request of the charging pile, and sends the current voltage value to the charging pile, wherein the charging voltage of the charging pile is adjusted to the current voltage value of the battery and then sends a first preset message to the electric vehicle; after receiving the first preset message, disconnects the relay of the second charging circuit.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the anti-adhesion method of a relay according to any one of claims 1 to 5.

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