Vehicle charging method and device, charger and electric vehicle

Abstract

The application discloses a vehicle charging method and device, a charger and an electric vehicle, and relates to the technical field of electric vehicle charging and discharging. The disclosed vehicle charging method comprises the following steps: when a target vehicle requiring power supply is connected, it is judged whether a discharging request is fed back by an intelligent vehicle terminal, the discharging request being triggered by a user on the intelligent vehicle terminal; if yes, power information of a battery management system is acquired; and the corresponding charging signal is outputted through the power information to charge the power battery of the target vehicle. The application is applied to a vehicle charger, the discharging request fed back by the intelligent vehicle terminal and the function information of the battery management system are used to charge the power battery of the target vehicle, compared with the prior art, the application only involves the interaction among the vehicle charger, the intelligent vehicle terminal and the battery management system, the discharging process is simplified, the waiting time caused by the interaction with the vehicle system is avoided, and the user experience is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle charging and discharging, and particularly relates to a vehicle charging method and device, a charging machine and an electric vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles, in order to meet the use requirements of people, some electric vehicles have a virtual-to-virtual (V2V) function. When the V2V function is activated, the electric vehicle is allowed to charge the power battery of another electric vehicle through a discharging gun.

[0003] At present, the V2V function is activated by a user pressing a corresponding switch button on a vehicle machine. After the V2V function is activated, a series of signal interactions need to be performed between a vehicle controller and the vehicle machine system before discharging can be started, such as identifying various charging and discharging parameters set by the user on the user interface of the vehicle machine system, which leads to a complex discharging process. After the V2V function is activated, the user needs to wait for a certain period of time to complete the signal interaction before charging can be started, and the user experience is poor. SUMMARY

[0004] The main purpose of the present application is to provide a vehicle charging method and device, a charging machine and an electric vehicle, which aims to solve the technical problems of the prior art that the discharging process is complex, the V2V function needs to wait for a certain period of time to complete the signal interaction before charging can be started after the V2V function is activated, and the user experience is poor.

[0005] To achieve the above purpose, the present application provides a vehicle charging method, which is applied to a vehicle-mounted charging machine, and the method comprises the following steps:

[0006] When a target vehicle requiring power supply is connected, it is judged whether a discharging request is fed back by an intelligent vehicle terminal, the discharging request being triggered by a user on the intelligent vehicle terminal;

[0007] If yes, power information of a battery management system is acquired;

[0008] A corresponding charging signal is outputted through the power information to charge a power battery of the target vehicle.

[0009] In an embodiment, the step of acquiring the power information of the battery management system if yes comprises:

[0010] If yes, a connection confirmation signal is acquired, the connection confirmation signal being triggered by the target vehicle when the discharging gun is connected;

[0011] According to the connection confirmation signal, it is judged whether the connection state between the target vehicle and the discharging gun is normal;

[0012] When the connection state is normal, it is judged whether the control guide interface of the discharge gun is successfully matched with the vehicle socket;

[0013] If successfully matched, the power information of the battery management system is acquired.

[0014] In an embodiment, the step of judging whether the connection state between the target vehicle and the discharge gun is normal according to the connection confirmation signal comprises:

[0015] The connection confirmation resistance value corresponding to the connection confirmation signal is determined;

[0016] It is judged whether the resistance value deviation between the connection confirmation resistance value and the preset resistance value is within a preset deviation range;

[0017] If within the preset deviation range, it is determined that the connection state between the target vehicle and the discharge gun is normal.

[0018] In an embodiment, the step of judging whether the control guide interface of the discharge gun is successfully matched with the vehicle socket when the connection state is normal comprises:

[0019] When the connection state is normal, it is judged whether the vehicle information unit feeds back a central lock locking signal;

[0020] If the central lock locking signal is received, it is judged whether the control guide interface of the discharge gun is successfully matched with the vehicle socket.

[0021] In an embodiment, the step of charging the power battery of the target vehicle by outputting a charging signal corresponding to the power information comprises:

[0022] The maximum allowable current of the battery management system is determined according to the power information;

[0023] The minimum value between the current allowable current and the maximum allowable current is taken as a target allowable current;

[0024] The current PWM signal is switched to a target PWM signal with a preset amplitude;

[0025] When currently in a high-voltage connection state, the power demand information of the target vehicle fed back by the intelligent vehicle terminal is received;

[0026] The power battery of the target vehicle is charged by outputting a charging signal through the target PWM signal, the target allowable current, and the power demand information.

[0027] In an embodiment, after the step of charging the power battery of the target vehicle by outputting the charging signal according to the target PWM signal, the target allowable current and the power requirement information, the method further comprises:

[0028] judging whether the intelligent vehicle terminal feeds back the function shutdown requirement information or the discharge limit information during the charging process;

[0029] when the intelligent vehicle terminal does not feed back the function shutdown requirement information and the discharge limit information, if a central locking locking signal fed back by a vehicle information unit is received, controlling the electronic lock to be locked;

[0030] when the electronic lock is locked, returning to the step of switching the current PWM signal to the target PWM signal with a preset amplitude.

[0031] In an embodiment, after the step of judging whether the intelligent vehicle terminal feeds back the function shutdown requirement information or the discharge limit information during the charging process, the method further comprises:

[0032] when the intelligent vehicle terminal feeds back the function shutdown requirement information or the discharge limit information, stopping outputting the charging signal to charge the power battery of the target vehicle;

[0033] when the output of the charging signal is stopped, judging whether a central locking unlocking signal fed back by a vehicle information unit is received;

[0034] if the central locking unlocking signal fed back by the vehicle information unit is received, controlling the electronic lock to be unlocked according to the central locking unlocking signal;

[0035] when the electronic lock is unlocked, disconnecting the high-voltage connection state and entering a sleep state.

[0036] In addition, to achieve the above-mentioned purpose, the application further provides a vehicle charging device, which comprises:

[0037] a communication module of an intelligent vehicle terminal, configured to judge whether the intelligent vehicle terminal feeds back a discharge request when a target vehicle requiring power supply is connected, the discharge request being triggered by a user on the intelligent vehicle terminal;

[0038] a communication module of a battery management system, configured to acquire power information of the battery management system if the discharge request is fed back;

[0039] a vehicle charging module, configured to output a corresponding charging signal to charge the target vehicle according to the power information.

[0040] In addition, to achieve the above object, the application further provides a vehicle-mounted charger, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle charging method.

[0041] In addition, to achieve the above object, the application further provides an electric vehicle, which comprises a charger, and the charger is provided with a computer program, and the computer program is executed by a processor to implement the steps of the vehicle charging method.

[0042] The one or more technical solutions provided by the application have at least the following technical effects:

[0043] The application judges whether the intelligent vehicle terminal feeds back a discharge request when the target vehicle to be powered is accessed, the discharge request being triggered by a user on the intelligent vehicle terminal; if yes, the power information of the battery management system is acquired; and the corresponding charging signal is outputted through the power information to charge the power battery of the target vehicle. The application is applied to a vehicle-mounted charger, and the discharge request fed back by the intelligent vehicle terminal and the function information of the battery management system are used to charge the power battery of the target vehicle. Compared with the prior art, after the V2V function is activated, the vehicle controller needs to interact with the vehicle system in a series of signals, and the application only involves the interaction among the vehicle-mounted charger, the intelligent vehicle terminal and the battery management system to realize the discharge, so as to charge the target vehicle through the alternating current signal outputted by the discharge, and the interaction between the vehicle controller and the vehicle system is not involved, so that the discharge process after the V2V function is activated is simplified, the waiting time caused by the interaction with the vehicle system is avoided, and the user experience is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0046] Figure 1 Flowchart of the first embodiment of the vehicle charging method of the application;

[0047] Figure 2 Flowchart of the second embodiment of the vehicle charging method of the application;

[0048] Figure 3Brief flow chart of V2V function in the second embodiment of the vehicle charging method of the embodiment;

[0049] Figure 4 Brief flow chart of the vehicle on-board charger starting discharging in the second embodiment of the vehicle charging method of the embodiment;

[0050] Figure 5 Brief flow chart of the third embodiment of the vehicle charging method of the embodiment;

[0051] Figure 6 Brief flow chart of the vehicle on-board charger discharging process in the third embodiment of the vehicle charging method of the embodiment;

[0052] Figure 7 Brief flow chart of the vehicle on-board charger stopping discharging in the third embodiment of the vehicle charging method of the embodiment;

[0053] Figure 8 Module structure of the vehicle charging device of the embodiment;

[0054] Figure 9 Hardware running environment structure of the vehicle on-board charger involved in the vehicle charging method of the embodiment.

[0055] The object, function features and advantages of the embodiment will be further explained with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] The specific embodiments described herein are merely intended to explain the technical solutions of the present application, and not to limit the present application.

[0057] In order to better understand the technical solutions of the present application, the specific embodiments will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] The main solution of the embodiment is that when the vehicle on-board charger is connected to the target vehicle to be powered, it is determined whether the intelligent vehicle terminal feedbacks a discharging request, the discharging request is triggered by the user on the intelligent vehicle terminal; if yes, the power information of the battery management system is obtained; and the corresponding charging signal is outputted through the power information to charge the power battery of the target vehicle.

[0059] In each embodiment, the vehicle on-board charger is taken as the execution subject for the convenience of description.

[0060] At present, the V2V function is activated by the user pressing the corresponding switch button on the vehicle machine, and a series of signal interactions between the vehicle controller and the vehicle machine system are required after the V2V function is activated, so that the discharging can be started, such as identifying various charging and discharging parameters set by the user on the user interface of the vehicle machine system, resulting in a complex discharging process. After the V2V function is activated, the user needs to wait for a certain period of time to complete the signal interaction before starting charging, which is not good for user experience.

[0061] The embodiment of the present application provides a solution, the vehicle charger realizes charging of the power battery of the target vehicle through the discharging request fed back by the intelligent vehicle terminal and the function information of the battery management system. Compared with the prior art, after the V2V function is activated, the vehicle controller needs to interact with the vehicle machine system, and the present application only involves the interaction between the vehicle charger, the intelligent vehicle terminal and the battery management system, so that the discharging can be realized, the alternating current signal output by the discharging is used to charge the target vehicle, and the interaction between the vehicle controller and the vehicle machine system is not involved, so that the discharging process after the V2V function is activated is simplified, the waiting time caused by the interaction with the vehicle machine system is avoided, and the user experience is effectively improved.

[0062] It should be noted that the execution subject of the embodiment can be a computing service device provided in the vehicle charger and having the functions of vehicle charging, network communication and program running, or an electronic device capable of realizing the above functions.

[0063] Based on this, the embodiment of the present application provides a vehicle charging method, which is described below with reference to Figure 1 , Figure 1 The flowchart of the first embodiment of the vehicle charging method of the present application is shown in the figure.

[0064] In the embodiment, the vehicle charging method is applied to the vehicle charger, and the vehicle charging method comprises steps S10-S30:

[0065] Step S10, when the target vehicle to be powered is accessed, it is judged whether the intelligent vehicle terminal feeds back a discharging request, and the discharging request is triggered by the user on the intelligent vehicle terminal.

[0066] It should be noted that the target vehicle and the vehicle charger are in the current vehicle.

[0067] It can be understood that the above-mentioned intelligent vehicle terminal can be in the Internet of Vehicles system, and the terminal device provides wireless communication ability for the vehicle in the system by integrating multiple communication technologies.

[0068] It should be noted that the above-mentioned discharging request can be a signal for activating the V2V function of the current vehicle.

[0069] In a specific implementation, when it is needed to charge the power battery of the target vehicle by the current vehicle, the user can connect the current vehicle and the target vehicle through the discharge gun to wake up the on-board charger. After the on-board charger is woken up, it can perform self-checking, i.e., execute a series of internal diagnosis and inspection procedures to ensure that all components and functions thereof are working properly, and after the detection is passed, it is determined that the current is ready to support charging or discharging operation. Based on this, the on-board charger can execute the operation of subsequent V2V function activation after the detection is passed, and after the current vehicle is connected with the target vehicle, the user can trigger the discharge request on the intelligent on-board terminal, for example, a two-dimensional code can be provided on the intelligent on-board terminal, and the user can trigger the discharge request on the intelligent on-board terminal by scanning the code. Based on this, the on-board charger can communicate and interact with the intelligent on-board terminal without interacting with the vehicle infotainment system, and whether the V2V function is activated can be determined by whether the discharge request feedback by the intelligent on-board terminal is received.

[0070] In step S20, if yes, the power information of the battery management system is acquired.

[0071] It should be noted that the above power information can be current and voltage information related to the power battery of the current vehicle, such as the maximum allowable current, which is used to limit the output of the power battery.

[0072] In a specific implementation, the on-board charger can communicate with the intelligent on-board terminal, and when the discharge request feedback by the intelligent on-board terminal is received, the V2V function is activated. After the V2V function is activated, the on-board charger can communicate with the battery management system to acquire the current power information of the battery management system.

[0073] In addition, the on-board charger can also detect whether the current is discharging or charging the power battery of the current vehicle or other vehicles. When it is detected that the current is not in the charging and discharging process, the V2V function can be activated according to the discharge request to avoid the failure to normally charge the target vehicle.

[0074] In step S30, the power battery of the target vehicle is charged by outputting a corresponding charging signal according to the power information.

[0075] In a specific implementation, the on-board charger can convert the direct current output of the power battery into an alternating current charging signal by adjusting the duty cycle of the corresponding PWM signal according to the power information, and output the charging signal to the target vehicle in the form of discharge, so that the target vehicle can charge its power battery based on the charging signal. The on-board charger can limit the power of the charging signal according to the power information to avoid the power of the charging signal exceeding the range that can be borne by the power battery, thereby improving the safety of discharging.

[0076] The embodiment provides a vehicle charging method. When a target vehicle requiring power supply is connected, whether a discharge request is fed back by an intelligent vehicle terminal is judged, the discharge request being triggered by a user on the intelligent vehicle terminal. If yes, power information of a battery management system is acquired. A corresponding charging signal is outputted according to the power information to charge a power battery of the target vehicle. The embodiment is applied to a vehicle charger. The discharge request fed back by the intelligent vehicle terminal and the function information of the battery management system are used to charge the power battery of the target vehicle. Compared with the prior art, after the V2V function is activated, the vehicle controller needs to interact with the vehicle system in a series of signals. The embodiment only involves the interaction among the vehicle charger, the intelligent vehicle terminal and the battery management system to realize the discharge, so that the target vehicle is charged through the alternating current signal outputted by the discharge. The interaction between the vehicle controller and the vehicle system is not involved, so that the discharge process after the V2V function is activated is simplified, the waiting time caused by the interaction with the vehicle system is avoided, and the user experience is effectively improved.

[0077] Based on the first embodiment of the application, the second embodiment of the application is provided. In the second embodiment of the application, the same or similar contents as the first embodiment can be referred to the above description, and will not be described hereinafter. On this basis, please refer to Figure 2 , Figure 2 FIG. 1 is a flowchart of the second embodiment of the vehicle charging method of the application.

[0078] In the embodiment, the step S20 includes steps S201-S204.

[0079] In the step S201, if yes, a connection confirmation signal is acquired, the connection confirmation signal being triggered by the target vehicle when the discharge gun is connected.

[0080] It should be noted that the connection confirmation signal can be used to judge whether the discharge gun is physically connected.

[0081] In the specific implementation, after the user connects the current vehicle and the target vehicle through the discharge gun, the discharge gun feeds back the connection confirmation signal to the vehicle charger. After the vehicle charger receives the connection confirmation signal, the vehicle charger is woken up and performs a self-checking operation. When the vehicle charger receives the discharge request fed back by the intelligent vehicle terminal and is not in other charging and discharging processes, the vehicle charger can call the received connection confirmation signal to perform subsequent operations.

[0082] In the step S202, whether the connection state between the target vehicle and the discharge gun is normal is judged according to the connection confirmation signal.

[0083] In a specific implementation, the on-board charger can detect whether the connection confirmation signal is normal, and when the connection confirmation signal is normal, it is determined that the connection state between the target vehicle and the discharge gun is normal, i.e., the discharge gun is normally connected to the current vehicle and the target vehicle, and it is further determined that the current vehicle has supported charging for the target vehicle.

[0084] For ease of understanding, refer to Figure 3 , Figure 3 The second embodiment of the vehicle charging method is a brief flowchart of the V2V function. As shown in Figure 3 , CC is used as the connection confirmation signal, and the on-board TBox is used as the intelligent on-board terminal. When the flow starts, it is detected whether the discharge gun is inserted. If not, it continues to wait for the discharge gun to be inserted. If the discharge gun has been inserted, the discharge gun feeds back the CC, and the on-board charger is awakened, i.e., the on-board charger is awakened from the sleep state. After the on-board charger is awakened, it is self-checked. After the self-checking is passed, it is detected whether the shared V2V function discharge request of the TBox is received, and it is not in other charging and discharging processes. If all conditions are met, the V2V function is activated.

[0085] In a feasible implementation, step S202 can include steps S2021-S2023:

[0086] Step S2021, determining the connection confirmation resistance value corresponding to the connection confirmation signal.

[0087] It should be noted that the discharge gun or the vehicle socket is built-in with a connection confirmation resistor. When the discharge gun is connected to the vehicle (i.e., the discharge gun is inserted into the vehicle socket), the connection confirmation resistor forms a loop with the on-board charger, and a connection confirmation signal is generated. The resistance value of the connection confirmation resistor can be the connection confirmation resistance value.

[0088] Step S2022, judging whether the resistance value deviation between the connection confirmation resistance value and the preset resistance value is within a preset deviation range.

[0089] Step S2023, if the preset deviation range is within the preset deviation range, it is determined that the connection state between the target vehicle and the discharge gun is normal.

[0090] It should be noted that the above-mentioned preset resistance value can be pre-set, which is a standardized resistance value indicating that the discharge gun is normally connected to the current vehicle. The preset resistance value can ensure the compatibility between charging equipment and vehicles of different manufacturers.

[0091] In a specific implementation, the preset deviation range can be a range preset for judging whether the resistance deviation between the connection confirmation resistance value and the preset resistance value is large. When the vehicle-mounted charger detects that the resistance deviation between the connection confirmation resistance value and the preset resistance value is within the preset deviation range, it can be determined that the resistance deviation is small, and the connection state between the target vehicle and the discharge gun is normal. On the contrary, when the vehicle-mounted charger detects that the resistance deviation between the connection confirmation resistance value and the preset resistance value is out of the preset deviation range, it can be determined that the resistance deviation is large, and the connection state between the target vehicle and the discharge gun is abnormal, such as the connection between the discharge gun and the target vehicle or the current vehicle being disconnected. When it is determined that the connection state between the target vehicle and the discharge gun is abnormal, the discharge stop operation is performed, the V2V function is exited, and the target vehicle is not charged.

[0092] Step S203, when the connection state is normal, judging whether the control guide interface of the discharge gun and the vehicle socket are successfully matched.

[0093] It should be noted that the control guide interface can be an interface for establishing communication connection between the discharge gun and the vehicle-mounted charger.

[0094] In a specific implementation, when the connection state of the discharge gun is normal, the vehicle-mounted charger can determine whether the control guide signal fed back by the discharge gun through the control guide interface is received. When the control guide signal is received, it is determined that the control guide interface of the discharge gun and the vehicle socket are successfully matched, the control guide interface of the discharge gun is completely connected, that is, the discharge gun has been successfully identified, and the discharge gun can be discharged. Otherwise, it is determined that the control guide interface of the discharge gun and the vehicle socket are not successfully matched, the discharge gun is not identified, and the discharge gun cannot be discharged. When it is determined that the control guide interface is not completely connected, the discharge stop operation is performed, the V2V function is exited, and the target vehicle is not charged.

[0095] It should be understood that the control guide signal can be a signal fed back after the discharge gun and the vehicle socket are matched, that is, the communication connection between the discharge gun and the vehicle-mounted charger is successfully established. The control guide signal can transmit safety-related information such as overcurrent protection, short circuit protection, and overheat protection to ensure the safety of the charging process.

[0096] In a feasible implementation, step S203 can include steps S2031-S2032:

[0097] Step S2031, when the connection state is normal, judging whether the vehicle information unit feeds back a central lock locking signal.

[0098] It should be noted that the vehicle information unit can be a controller for collecting and processing various information of the vehicle.

[0099] It can be understood that the above-mentioned central locking locking signal can be a signal for controlling the locking of an electronic lock. The electronic lock can be a central locking for controlling the locking or unlocking of a vehicle (such as the locking and unlocking of a vehicle door).

[0100] In step S2032, if the central locking locking signal is received, it is determined whether the control guide interface of the discharge gun and the vehicle socket are successfully matched.

[0101] In a specific implementation, when the on-board charger detects that the connection state is normal, it can first determine whether the vehicle information unit feeds back a central locking locking signal. When the central locking locking signal fed back by the vehicle information unit is received, it is determined that the electronic lock is locked. When the electronic lock is locked, the above-mentioned operation of determining whether the control guide interface of the discharge gun and the vehicle socket are successfully matched can be performed, so as to keep the target vehicle to be charged in the state of the electronic lock being locked, and ensure the safety of the charging process. For example, when the electronic lock is locked, charging can be avoided during the charging process, and the risk of damage to the power battery of the target vehicle is reduced.

[0102] In step S204, if the matching is successful, the power information of the battery management system is obtained.

[0103] In a specific implementation, when the on-board charger finally detects that the control guide interface of the discharge gun and the vehicle socket are successfully matched through the above-mentioned manner, the power information of the battery management system can be obtained. The corresponding charging signal is outputted through the power information to charge the power battery of the target vehicle, so as to ensure that the target vehicle is charged when the connection confirmation signal is normal, the electronic lock is locked, and the control guide interface is completely connected, and the safety of the charging process is ensured.

[0104] For the convenience of understanding, please refer to Figure 4 , Figure 4 This is a brief flowchart of the on-board charger starting to discharge in the second embodiment of the vehicle charging method of the present embodiment. As shown in Figure 4As shown, CC is used as the connection confirmation signal, CP interface is used as the control pilot interface, 9V PWM output is used as the current PWM signal, and 6V PWM output is used as the target PWM signal. After the V2V function is activated, if the CC is abnormal, the discharge stop operation is performed; if the CC is normal, when the VIU is controlled to be locked, it is determined whether the CP interface is completely connected; if the CP interface is not completely connected, the discharge stop operation is performed; if the CP interface is completely connected, the switch is switched to the 9V PWM output, the current allowed current and the maximum allowed current of the BMS (i.e., the battery management system) are cancelled, the target allowed current is obtained, the current PWM duty cycle is output, the PWM is changed to 6V (i.e., the 9V PWM output is switched to the 6V PWM output), and if the PWM is not changed to 6V, the discharge stop operation is performed. After the PWM is changed to 6V, it is determined whether high-voltage connection is performed; if the high-voltage connection is not performed, the discharge stop operation is performed; if the high-voltage connection is performed, when the power demand information of the TBox is received, the target allowed current is output according to the 6V PWM signal and the power demand information, i.e., the AC signal is output to charge the target vehicle.

[0105] Based on the first embodiment of the present application, the third embodiment of the present application is proposed. In the third embodiment of the present application, the same or similar contents as the above first embodiment and second embodiment can be referred to the above description, and will not be described hereinafter. On this basis, please refer to Figure 5 , Figure 5 The flowchart of the third embodiment of the vehicle charging method of the present application is shown.

[0106] In the present embodiment, step S30 includes steps S301-S305:

[0107] In step S301, the maximum allowed current of the battery management system is determined according to the power information.

[0108] It should be noted that the above maximum allowed current can be the maximum current value that the power battery can withstand in a safe and healthy state.

[0109] In step S302, the minimum value between the current allowed current and the maximum allowed current is taken as the target allowed current.

[0110] It should be noted that the above current allowed current can be the current value that the power battery can output at present.

[0111] In a specific implementation, the vehicle charger can compare the current allowed current and the maximum allowed current, and take the minimum value between the current allowed current and the maximum allowed current as the target allowed current. That is, when the current allowed current is lower than the maximum allowed current, the current allowed current is taken as the target allowed current, and when the current allowed current is higher than or equal to the maximum allowed current, the maximum allowed current is taken as the target allowed current, so as to avoid the current of the discharging output exceeding the maximum allowed current and affecting the power battery.

[0112] In step S303, the current PWM signal is switched to a target PWM signal with a preset amplitude.

[0113] It should be noted that the current PWM signal can be a PWM signal corresponding to the case where the control guide interface is completely connected, and the amplitude can be 9V.

[0114] It can be understood that the preset amplitude can be an amplitude of a PWM signal suitable for V2V function and supporting charging of the target vehicle, such as 6V.

[0115] In a specific implementation, a plurality of switches, such as relays, can be provided in the vehicle charger, and different relays can output PWM signals with different amplitudes when closed. When the control guide interface is completely connected, the vehicle charger can be switched to the current PWM signal output (such as 9V PWM output) through the switch, and then the current PWM signal is switched to a target PWM signal with a preset amplitude after the target allowed current is determined, so as to facilitate subsequent charging of the target vehicle using the target PWM signal.

[0116] In step S304, when the current is in a high-voltage connection state, the intelligent vehicle terminal feeds back the power demand information of the target vehicle.

[0117] It should be noted that the high-voltage connection state can be a state in which the high-voltage battery system of the current vehicle is connected to the target vehicle. Through the high-voltage connection state, the target vehicle can be continuously and stably charged, and the charging efficiency and charging speed are improved.

[0118] It can be understood that the power demand information can be current information and voltage information required by the current full point of the current of the target vehicle.

[0119] In a specific implementation, after switching the target PWM signal, the vehicle charger can communicate with the intelligent vehicle terminal and receive the power demand information of the target vehicle fed back by the intelligent vehicle terminal, so as to charge the target vehicle based on the power demand information and avoid potential safety hazards caused by charging the target vehicle after it is fully charged.

[0120] It should be understood that when it is detected that the current is not in a high-voltage connection state, a discharging stop operation is performed, the V2V function is exited, and the target vehicle is not charged.

[0121] In step S305, the power battery of the target vehicle is charged by a charging signal outputted according to the target PWM signal, the target allowable current and the power demand information.

[0122] In a specific implementation, the on-board charger can control an internal charging circuit by the target PWM signal, convert the direct current of the power battery into an alternating current charging signal and output the charging signal to the power battery of the target vehicle. Meanwhile, the power of the output charging signal is controlled to be no more than the target allowable current, and the charging is stopped when the current or voltage corresponding to the power demand information is reached.

[0123] It should be noted that, during the charging process, if the on-board charger detects a fault, the temperature of the charging port reaches a preset temperature (e.g., 110°C), or the communication with the battery management system is lost for a preset time (e.g., 10s), the charging signal output is turned off, and the discharging stop operation is performed to avoid the influence of the fault, the high charging temperature or the communication loss with the battery management system on the current vehicle or the target vehicle.

[0124] Further, when the on-board charger does not have a fault, the temperature of the charging port does not reach the preset temperature, and the communication with the battery management system is not lost, if the control guide interface is detected to be semi-connected (e.g., the discharging gun connected to the vehicle socket is loose), the discharging stop operation is performed to reduce the security risk. When the control guide interface is detected to be completely connected, if the target PWM signal is detected to be switched to the original current PWM signal, the discharging stop operation is performed to avoid outputting an incorrect alternating current signal and affecting the target vehicle. If the target PWM signal is detected to be not switched to the original PWM signal, the charging process is continued.

[0125] In a feasible implementation, after step S305, steps S306-S308 are further included.

[0126] In step S306, it is determined whether the intelligent on-board terminal feeds back function shutdown demand information or discharging limit information during the charging process.

[0127] It should be noted that the function shutdown demand information can be information for stopping the charging process.

[0128] It can be understood that the discharging limit information can be information for reaching the upper limit of the current of the target vehicle. The discharging limit information can be manually set by a user, and when not set, the charging process can be controlled based on the power demand information.

[0129] In step S3061, when the intelligent on-board terminal does not feed back the function shutdown demand information and the discharging limit information, if a central lock locking signal fed back by a vehicle information unit is received, the electronic lock is controlled to be locked.

[0130] Step S3062, when the electronic lock is locked, return to the step of switching the current PWM signal to the target PWM signal with preset amplitude.

[0131] In the specific implementation, the user can actively input the function shutdown demand information or the discharge limit information on the intelligent vehicle terminal to actively control the charging process. When the vehicle charger detects the function shutdown demand information or the discharge limit information fed back by the intelligent vehicle terminal, the vehicle charger can stop the AC signal output, and conversely, if the function shutdown demand information and the discharge limit information are not received, the charging process is continued. In the charging process, if the central locking lock signal is received, it is determined that the electronic lock is unlocked. In order to ensure the safety of the charging process, the electronic lock can be controlled to be locked and the charging process is continued. If the central locking lock signal is not received, it is determined that the electronic lock is still in the locked state, and the charging process is continued.

[0132] For ease of understanding, please refer to Figure 6 , Figure 6 is a schematic diagram of the discharge process of the vehicle charger in the third embodiment of the vehicle charging method. As shown in Figure 6 , CC is used as the connection confirmation signal, 9V PWM output is used as the current PWM signal, 6V PWM output is used as the target PWM signal, VIU is used as the vehicle information unit, 110℃ is used as the preset temperature, and 10s is used as the preset time length. After the vehicle charger outputs the target allowable current obtained by taking the minimum value, in the discharge process, if it is detected that there is an OBC (vehicle charger) fault that needs to stop charging, or the temperature of the charging port reaches 110℃, or the communication with the BMS (battery management system) is lost for more than 10s, the AC output is turned off and the discharge stop operation is performed. Otherwise, the CC connection is continuously detected. If the CC is semi-connected, it is determined that the control guide interface is semi-connected, the AC output is turned off, and the discharge stop operation is performed. If the CC is fully connected, it is continuously confirmed whether the PWM has changed to 9V again. If the PWM has changed to 9V again, the AC output is turned off and the discharge stop operation is performed. If the PWM has not changed to 9V, i.e., it is still at 6V, when the CC is not connected (i.e., whether the discharge gun is disconnected from the vehicle socket) or the function shutdown demand information is received or the discharge limit information is received, the AC output is turned off and the discharge stop operation is performed. When the CC is connected and the function shutdown demand information and the discharge limit information are not received, it is determined whether the VIU central locking is equal to the lock (i.e., whether the central locking lock signal fed back by the vehicle information unit is received). If not, the output of the target allowable current obtained by taking the minimum value is performed and the discharge is continued. If yes, the electronic lock is controlled to be locked and the output of the target allowable current obtained by taking the minimum value is performed and the discharge is continued.

[0133] Further, step S306 can further include steps A3061-A3064 after step S306:

[0134] Step A3061, when the intelligent vehicle terminal feeds back the function closing demand information or the discharge limit information, stop outputting the charging signal to charge the power battery of the target vehicle.

[0135] In a specific implementation, when the intelligent vehicle terminal feeds back the function closing demand information or the discharge limit information, the vehicle charger stops outputting the charging signal to charge the power battery of the target vehicle.

[0136] Step A3062, when the charging signal stops outputting, determine whether the central lock unlocking signal fed back by the vehicle information unit is received.

[0137] It should be noted that the central lock unlocking signal can be a signal for controlling the unlocking of the electronic lock.

[0138] Step A3063, if the central lock unlocking signal fed back by the vehicle information unit is received, the electronic lock is unlocked according to the central lock unlocking signal.

[0139] Step A3064, when the electronic lock is unlocked, the high-voltage connection state is disconnected, and the sleep state is entered.

[0140] In a specific implementation, when the charging signal stops outputting, the vehicle charger can detect the electronic lock locking indication, and when the electronic lock is locked, determine whether the central lock unlocking signal fed back by the vehicle information unit is received to unlock the electronic lock. That is, when the central lock unlocking signal is received, the electronic lock is unlocked through the central lock unlocking signal, and when the central lock unlocking signal is not received, the vehicle charger is in a waiting state. After the electronic lock is unlocked, the high-voltage connection is disconnected, the high-voltage connection state is exited, and the sleep state is entered when there is no other wake-up source, so as to exit the V2V function and complete the entire charging process.

[0141] For ease of understanding, please refer to Figure 7 , Figure 7 is a schematic diagram of the vehicle charging method of the third embodiment of the vehicle charger of the present embodiment. As shown in Figure 7As shown, VIU is taken as a vehicle information unit for illustration, when performing the discharge stop operation, it is detected whether the electronic lock is locked, if the electronic lock is locked, it is judged whether the central lock in the VIU is equal to the unlocking (i.e. the central lock unlocking signal is received), if not, it is returned to the step of detecting whether the electronic lock is locked, and continues to be obtained, if yes, the electronic lock is unlocked; after the electronic lock is unlocked, it is judged whether the high voltage is disconnected and there is no other wake-up source, if yes, it is put into hibernation, if not, it is continued to repeat the judgment process until the judgment condition is met to enter the hibernation, so as to ensure that the vehicle-mounted charger is hibernated when there is no high voltage disconnection and other wake-up sources, and the safety performance is improved.

[0142] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the vehicle charging method of the present application. More forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0143] The present application also provides a vehicle charging device, please refer to Figure 8 , Figure 8 The present application provides a vehicle charging device, please refer to

[0144] As Figure 8 shown, the vehicle charging device provided by the present application comprises:

[0145] The intelligent vehicle terminal communication module 10 is used to judge whether the intelligent vehicle terminal feedbacks the discharge request when the target vehicle to be powered is accessed, and the discharge request is triggered by the user on the intelligent vehicle terminal.

[0146] The battery management system communication module 20 is used to obtain the power information of the battery management system if yes.

[0147] The vehicle charging module 30 is used to output the corresponding charging signal to the target vehicle for charging through the power information.

[0148] The vehicle charging device provided by the present application adopts the vehicle charging method in the above embodiment, which can solve the technical problems of the prior art that the discharge process is complex, the V2V function needs to wait for a certain time to complete the signal interaction before starting charging after being activated, and the user experience is poor. Compared with the prior art, the vehicle charging device provided by the present application has the same beneficial effects as the vehicle charging method provided by the above embodiment, and the other technical features in the vehicle charging device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0149] This application provides an on-board charger, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the vehicle charging method in Embodiment 1 above.

[0150] The following is for reference. Figure 9 , Figure 9 This is a schematic diagram of the hardware operating environment structure of the on-board charger involved in the vehicle charging method in this application embodiment. Figure 9 The on-board charger shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0151] like Figure 9 As shown, the on-board charger may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the on-board charger. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the on-board charger to communicate wirelessly or wiredly with other devices (such as a smart on-board terminal or a battery management system) to exchange data. While the figures show on-board chargers with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0152] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the method shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiments disclosed in the present application are executed.

[0153] The vehicle charger provided by the present application adopts the vehicle charging method in the above-mentioned embodiments, and can solve the technical problems of the prior art that the discharging process is complex, and after the V2V function is activated, the charging can only be started after a certain period of time after the signal interaction is completed, and the user experience is poor. Compared with the prior art, the vehicle charger provided by the present application has the same beneficial effects as the vehicle charging method provided by the above-mentioned embodiments, and other technical features in the vehicle charger are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0154] The electric vehicle provided by the present application includes the charger described above, and the charger is provided with a computer program, which realizes the steps of the vehicle charging method as described above when executed by a processor.

[0155] The electric vehicle provided by the present application can solve the technical problems of the prior art that the discharging process is complex, and after the V2V function is activated, the charging can only be started after a certain period of time after the signal interaction is completed, and the user experience is poor. Compared with the prior art, the electric vehicle provided by the present application has the same beneficial effects as the vehicle charging method provided by the above-mentioned embodiments, which will not be repeated here.

[0156] It should be understood that various parts of the present application can be realized by hardware, software, firmware or a combination thereof. In the description of the above-mentioned embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0157] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0158] The above merely describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made based on the technical concept of the present application and the content of the specification and drawings, is included in the patent protection scope of the present application.

Claims

1. A vehicle charging method characterized by, The method is applied to a vehicle charger, and the method comprises: When a target vehicle requiring power supply is connected, it is determined whether a discharge request is fed back by an intelligent vehicle terminal, the discharge request being triggered by a user on the intelligent vehicle terminal; If yes, power information of a battery management system is acquired; A corresponding charging signal is outputted according to the power information to charge a power battery of the target vehicle; The step of charging the power battery of the target vehicle by outputting the corresponding charging signal according to the power information comprises: The maximum allowable current of the battery management system is determined according to the power information; The minimum value between the current allowable current and the maximum allowable current is taken as a target allowable current; A current PWM signal is switched to a target PWM signal with a preset amplitude; When the current connection state is a high-voltage connection state, power demand information of the target vehicle fed back by the intelligent vehicle terminal is received; The power battery of the target vehicle is charged by outputting a charging signal according to the target PWM signal, the target allowable current and the power demand information; It is determined whether function shutdown demand information or discharge limit value information is fed back by the intelligent vehicle terminal during the charging process; When the function shutdown demand information and the discharge limit value information are not fed back by the intelligent vehicle terminal, if a central lock locking signal fed back by a vehicle information unit is received, the electronic lock is controlled to be locked; When the electronic lock is locked, the step of switching the current PWM signal to the target PWM signal with the preset amplitude is returned.

2. The vehicle charging method according to claim 1, characterized by, The step of acquiring the power information of the battery management system if yes comprises: If yes, a connection confirmation signal is acquired, the connection confirmation signal being triggered when the target vehicle is connected through a discharge gun; It is determined whether the connection state between the target vehicle and the discharge gun is normal according to the connection confirmation signal; When the connection state is normal, it is determined whether a control guide interface of the discharge gun and a vehicle socket are successfully matched; If successfully matched, the power information of the battery management system is acquired.

3. The vehicle charging method according to claim 2, characterized by, The step of determining whether the connection state between the target vehicle and the discharge gun is normal according to the connection confirmation signal comprises: A connection confirmation resistance corresponding to the connection confirmation signal is determined; It is determined whether a resistance deviation between the connection confirmation resistance and a preset resistance is within a preset deviation range; If the resistance deviation is within the preset deviation range, it is determined that the connection state between the target vehicle and the discharge gun is normal.

4. The vehicle charging method according to claim 2, characterized by, The step of determining whether the control guide interface of the discharge gun and the vehicle socket are successfully matched when the connection state is normal comprises: When the connection state is normal, it is determined whether a central lock locking signal is fed back by a vehicle information unit; If the central lock locking signal is received, it is determined whether the control guide interface of the discharge gun and the vehicle socket are successfully matched.

5. The vehicle charging method according to claim 1, wherein After the step of determining whether the function shutdown demand information or the discharge limit value information is fed back by the intelligent vehicle terminal during the charging process, the method further comprises: When the function shutdown demand information or the discharge limit value information is fed back by the intelligent vehicle terminal, the charging of the power battery of the target vehicle by outputting the charging signal is stopped. When the charging signal stops outputting, it is judged whether a central locking unlocking signal fed back by the vehicle information unit is received; If the central locking unlocking signal fed back by the vehicle information unit is received, the electronic lock is controlled to be unlocked according to the central locking unlocking signal; When the electronic lock is unlocked, the high-voltage connection state is disconnected, and a hibernation state is entered.

6. A vehicle charging device, characterized by, The device comprises: A smart vehicle terminal communication module is configured to judge whether a discharge request is fed back by the smart vehicle terminal when a target vehicle requiring power supply is accessed, the discharge request being triggered by a user on the smart vehicle terminal; A battery management system communication module is configured to acquire power information of the battery management system if the discharge request is fed back; A vehicle charging module is configured to output a corresponding charging signal to the target vehicle for charging through the power information; The vehicle charging module is further configured to: Determine a maximum allowable current of the battery management system according to the power information; Take a minimum value between a current allowable current and the maximum allowable current as a target allowable current; Switch a current PWM signal to a target PWM signal with a preset amplitude; When the current is in a high-voltage connection state, receive power demand information of the target vehicle fed back by the smart vehicle terminal; Output a charging signal to charge a power battery of the target vehicle through the target PWM signal, the target allowable current, and the power demand information; Judge whether function shutdown demand information or discharge limit information is fed back by the smart vehicle terminal during the charging process; If a central locking locking signal fed back by the vehicle information unit is received when the smart vehicle terminal does not feed back the function shutdown demand information and the discharge limit information, the electronic lock is controlled to be locked; When the electronic lock is locked, the operation of switching the current PWM signal to the target PWM signal with the preset amplitude is performed.

7. An on-board charger, characterized by, The vehicle charging machine comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle charging method according to any one of claims 1 to 6.

8. An electric vehicle, characterized by The electric vehicle comprises a charging machine, and the charging machine is provided with a computer program, the computer program being executed by a processor to implement the steps of the vehicle charging method according to any one of claims 1 to 6.

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