Vehicle charging method and device, charger and electric vehicle

Abstract

The invention 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, and the vehicle charging method comprises the steps that when a target vehicle needing power supply is connected, whether an intelligent vehicle-mounted terminal feeds back a discharging request or not is judged, and the discharging request is triggered by a user on the intelligent vehicle-mounted terminal; if yes, power information of the battery management system is obtained; and outputting a corresponding charging signal through the power information to charge a power battery of the target vehicle. The method is applied to the vehicle-mounted charger, the power battery of the target vehicle is charged through the discharging request fed back by the intelligent vehicle-mounted terminal and the function information of the battery management system, compared with the prior art, the method only relates to interaction among the vehicle-mounted charger, the intelligent vehicle-mounted terminal and the battery management system, the discharging process is simplified, and the charging efficiency is improved. The waiting time generated by interaction with the vehicle machine 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 in particular to a vehicle charging method, device, charger and electric vehicle. Background Art

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

[0003] At present, the V2V function is activated by the user pressing the corresponding switch button on the vehicle computer. After the V2V function is activated, the vehicle controller needs to perform a series of signal interactions with the vehicle computer system before discharging can begin, such as identifying the various charging and discharging parameters set by the user on the user interface of the vehicle computer system. This makes the discharge process complicated. After the V2V function is activated, it is necessary to wait for a certain period of time to complete the signal interaction before charging can begin, resulting in a poor user experience. Summary of the invention

[0004] The main purpose of this application is to provide a vehicle charging method, device, charger and electric vehicle, aiming to solve the technical problems of the prior art, such as the complicated discharge process, the need to wait for a certain period of time to complete the signal interaction after the V2V function is activated before charging can start, and the poor user experience.

[0005] To achieve the above object, the present application provides a vehicle charging method, which is applied to a vehicle charger, and comprises:

[0006] When the target vehicle to be powered is connected, determining whether the intelligent vehicle terminal feeds back a discharge request, wherein the discharge request is triggered by a user on the intelligent vehicle terminal;

[0007] If yes, then obtain the power information of the battery management system;

[0008] The power battery of the target vehicle is charged by outputting a charging signal corresponding to the power information.

[0009] In one embodiment, if yes, the step of obtaining power information of the battery management system includes:

[0010] If yes, a connection confirmation signal is obtained, wherein the connection confirmation signal is triggered when the target vehicle is connected via a discharge gun;

[0011] Determining whether the connection status between the target vehicle and the discharge gun is normal according to the connection confirmation signal;

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

[0013] If the match is successful, the power information of the battery management system is obtained.

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

[0015] Determine a connection confirmation resistance value corresponding to the connection confirmation signal;

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

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

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

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

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

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

[0022] Determining a maximum allowable current of the battery management system according to the power information;

[0023] taking the minimum value between the current allowed current and the maximum allowed current as the target allowed current;

[0024] Switch the current PWM signal to a target PWM signal of a preset amplitude;

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

[0026] A charging signal is outputted through the target PWM signal, the target allowed current and the power demand information to charge the power battery of the target vehicle.

[0027] In one embodiment, after the step of outputting a charging signal to charge the power battery of the target vehicle by using the target PWM signal, the target allowed current and the power demand information, the step further includes:

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

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

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

[0031] In one embodiment, after the step of determining whether the intelligent vehicle-mounted terminal feeds back function shutdown requirement information or discharge limit information during the charging process, the method further includes:

[0032] When the intelligent vehicle-mounted terminal feeds back the function shut-down requirement information or the discharge limit value information, stop outputting the charging signal to charge the power battery of the target vehicle;

[0033] When the charging signal stops being output, determining whether a central lock unlocking signal fed back by a vehicle information unit is received;

[0034] If a central lock unlocking signal fed back by the vehicle information unit is received, the electronic lock is controlled to unlock according to the central lock unlocking signal;

[0035] When the electronic lock is unlocked, the high voltage connection state is disconnected and the dormant state is entered.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle charging device, the device comprising:

[0037] The intelligent vehicle terminal communication module is used to determine whether the intelligent vehicle terminal feeds back a discharge request when the target vehicle to be powered is connected, and the discharge request is triggered by the user on the intelligent vehicle terminal;

[0038] A battery management system communication module is used to obtain power information of the battery management system if yes;

[0039] The vehicle charging module is used to charge the target vehicle by outputting a charging signal corresponding to the power information.

[0040] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle-mounted charger, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle charging method described above.

[0041] In addition, to achieve the above-mentioned purpose, the present application also proposes an electric vehicle, which includes a charger, and the charger is provided with a computer program, and when the computer program is executed by a processor, the steps of the vehicle charging method described above are implemented.

[0042] One or more technical solutions proposed in this application have at least the following technical effects:

[0043] This application determines whether the intelligent vehicle terminal feeds back a discharge request when the target vehicle that needs power supply is connected. The discharge request is triggered by the user on the intelligent vehicle terminal. If so, the power information of the battery management system is obtained. The power battery of the target vehicle is charged by outputting a corresponding charging signal through the power information. This application is applied to the on-board charger, and the power battery of the target vehicle is charged through the discharge request fed back by the intelligent vehicle terminal and the functional information of the battery management system. Compared with the prior art, the vehicle controller needs to perform a series of signal interactions with the vehicle system after the V2V function is activated. This application only involves the interaction between the on-board charger, the intelligent vehicle terminal and the battery management system to achieve discharge, so as to charge the target vehicle through the AC signal output by the discharge. It does not involve the interaction between the vehicle controller and the vehicle system, so that the discharge process after the V2V function is activated is simplified, avoiding the waiting time caused by the interaction with the vehicle system, and effectively improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 This is a flow chart of the first embodiment of the vehicle charging method of the present application;

[0047] Figure 2 This is a flow chart of the second embodiment of the vehicle charging method of the present application;

[0048] Figure 3This is a brief flowchart of the V2V function in the second embodiment of the vehicle charging method of this embodiment;

[0049] Figure 4 This is a schematic diagram of a brief process of the on-board charger starting to discharge in the second embodiment of the vehicle charging method of this embodiment;

[0050] Figure 5 This is a flow chart of a third embodiment of the vehicle charging method of the present application;

[0051] Figure 6 This is a schematic diagram of a brief flow chart of the discharge process of the on-board charger in the third embodiment of the vehicle charging method of this embodiment;

[0052] Figure 7 This is a schematic diagram of a brief process of stopping the discharge of the on-board charger in the third embodiment of the vehicle charging method of this embodiment;

[0053] Figure 8 This is a schematic diagram of the module structure of the vehicle charging device of this application;

[0054] Fig. 9 This is a schematic diagram of the hardware operating environment structure of the on-board charger involved in the vehicle charging method in the embodiment of the present application.

[0055] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] It should be noted that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0057] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0058] The main solution of the embodiment of the present application is: when the target vehicle to be powered is connected, the on-board charger determines whether the intelligent vehicle terminal has fed back a discharge request, and the discharge request is triggered by the user on the intelligent vehicle terminal; if so, the power information of the battery management system is obtained; and the power battery of the target vehicle is charged by outputting a corresponding charging signal through the power information.

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

[0060] At present, the V2V function is activated by the user pressing the corresponding switch button on the vehicle computer. After the V2V function is activated, the vehicle controller needs to perform a series of signal interactions with the vehicle computer system before discharging can begin, such as identifying the various charging and discharging parameters set by the user on the user interface of the vehicle computer system. This makes the discharge process complicated. After the V2V function is activated, it is necessary to wait for a certain period of time to complete the signal interaction before charging can begin, resulting in a poor user experience.

[0061] The embodiment of the present application provides a solution, in which the on-board charger charges the power battery of the target vehicle through the discharge request fed back by the intelligent on-board terminal and the functional information of the battery management system. Compared with the prior art, the vehicle controller needs to perform a series of signal interactions with the vehicle system after the V2V function is activated. The present application only involves the interaction between the on-board charger, the intelligent on-board terminal and the battery management system to achieve discharge, so as to charge the target vehicle through the AC signal output by the discharge, and does not involve the interaction between the vehicle controller and the vehicle system, 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.

[0062] It should be noted that, in addition to the on-board charger, the execution subject of this embodiment can also be a computing service device installed in the on-board charger and having vehicle charging, network communication and program running functions, or an electronic device that can realize the above functions.

[0063] Based on this, the embodiment of the present application provides a vehicle charging method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle charging method of the present application.

[0064] In this embodiment, the vehicle charging method is applied to a vehicle charger, and the vehicle charging method includes steps S10 to S30:

[0065] Step S10, when the target vehicle to be powered is connected, it is determined whether the intelligent vehicle terminal feeds back a discharge request, wherein the discharge request is triggered by a user on the intelligent vehicle terminal.

[0066] It should be noted that the above-mentioned target vehicle is different from the current vehicle where the on-board charger is located.

[0067] It is understandable that the above-mentioned intelligent vehicle-mounted terminal can be in a vehicle networking system, and can be a terminal device that provides the vehicle with wireless communication capabilities with the outside world by integrating multiple communication technologies.

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

[0069] In the specific implementation, when it is necessary to charge the power battery of the target vehicle electric vehicle through 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 awakened, it can perform a self-test, that is, perform a series of internal diagnostic and inspection procedures to ensure that all its components and functions are working properly. After the test passes, it is determined that it is currently ready to support charging or discharging operations. Based on this, the on-board charger can perform subsequent V2V function activation operations after the test passes. After the current vehicle is connected to the target vehicle, the user can trigger a discharge request on the smart vehicle terminal. For example, a QR code can be set on the smart vehicle terminal, and the user can trigger a discharge request on the smart vehicle terminal by scanning the code. Based on this, the on-board charger can communicate and interact with the smart vehicle terminal without interacting with the vehicle system. Whether to interact with the V2V function can be determined by whether the discharge request fed back by the smart vehicle terminal is received.

[0070] Step S20: If yes, then obtain the power information of the battery management system.

[0071] It should be noted that the above power information may 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 vehicle charger can communicate with the smart vehicle terminal and activate the V2V function when receiving the discharge request fed back by the smart vehicle terminal. After activating the V2V function, it can communicate with the battery management system to obtain the current power information of the battery management system.

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

[0074] Step S30, charging the power battery of the target vehicle by outputting a charging signal corresponding to the power information.

[0075] In a specific implementation, the on-board charger can adjust the duty cycle of the corresponding PWM signal through the power information to convert the DC output of the power battery into an AC charging signal, 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. Among them, the on-board charger can limit the power of the charging signal according to the power information to prevent the power of the charging signal from exceeding the range that the power battery can bear, thereby improving the safety of discharge.

[0076] This embodiment provides a vehicle charging method, by judging whether the intelligent vehicle terminal feedbacks a discharge request when the target vehicle to be powered is connected, and the discharge request is triggered by the user on the intelligent vehicle terminal; if so, the power information of the battery management system is obtained; and the power battery of the target vehicle is charged by outputting a corresponding charging signal through the power information. This embodiment is applied to the vehicle charger, and the power battery of the target vehicle is charged through the discharge request feedback from the intelligent vehicle terminal and the functional information of the battery management system. Compared with the prior art, the vehicle controller needs to perform a series of signal interactions with the vehicle system after the V2V function is activated. This embodiment only involves the interaction between the vehicle charger, the intelligent vehicle terminal and the battery management system to achieve discharge, so as to charge the target vehicle through the AC signal output by the discharge, and does not involve the interaction between the vehicle controller and the vehicle system, so that the discharge process after the V2V function is activated is simplified, and the waiting time generated by the interaction with the vehicle system is avoided, which effectively improves the user experience.

[0077] Based on the first embodiment of the present application, the second embodiment of the present application is proposed. In the second embodiment of the present application, the same or similar contents as those of the first embodiment can be referred to the above introduction, and will not be repeated later. Figure 2 , Figure 2 This is a flow chart of the second embodiment of the vehicle charging method of the present application.

[0078] In this embodiment, step S20 includes steps S201 to S204:

[0079] Step S201: If yes, a connection confirmation signal is obtained, wherein the connection confirmation signal is triggered when the target vehicle is connected via a discharge gun.

[0080] It should be noted that the connection confirmation signal can be used to determine whether the discharge gun has completed physical connection.

[0081] In a specific implementation, after the user connects the current vehicle and the target vehicle through the discharge gun, the discharge gun will feed back a connection confirmation signal to the on-board charger, and the on-board charger will wake up after receiving the connection confirmation signal and perform a self-check operation. When the on-board charger receives a discharge request fed back by the smart on-board terminal and is not in other charging and discharging processes, it can call the received connection confirmation signal to perform subsequent operations.

[0082] Step S202: determining whether the connection state between the target vehicle and the discharge gun is normal according to the connection confirmation signal.

[0083] In a specific implementation, the above-mentioned on-board charger can detect whether the connection confirmation signal is normal. When the connection confirmation signal is normal, it is determined that the connection status between the target vehicle and the discharge gun is normal, that is, the discharge gun is normally connected to the current vehicle and the target vehicle, and then it is determined that charging for the target vehicle is currently supported.

[0084] For ease of understanding, please refer to Figure 3 , Figure 3 This is a brief flow chart of the V2V function in the second embodiment of the vehicle charging method of this embodiment. Figure 3 As shown, CC is used as the connection confirmation signal, and the vehicle-mounted TBox is used as an intelligent vehicle-mounted terminal for explanation. At the beginning of the process, it is detected whether the discharge gun is plugged in. If not, it continues to wait for the discharge gun to be plugged in. If the discharge gun is plugged in, the discharge gun feedbacks CC to wake up the vehicle-mounted charger, and the vehicle-mounted charger is awakened from the dormant state. After the vehicle-mounted charger is awakened, it performs a self-test. After the self-test passes, it detects whether it has received the shared V2V function discharge request from the TBox and is not in other charging and discharging processes. If all are met, the V2V function is activated.

[0085] In a feasible implementation, step S202 may include steps S2021 to S2023:

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

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

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

[0089] Step S2023: If it 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 preset resistance value can be a pre-set standardized resistance value used to indicate that the discharge gun is normally connected to the current vehicle. The preset resistance value can ensure compatibility between charging devices and vehicles of different manufacturers.

[0091] In a specific implementation, the preset deviation range may be a pre-set range for determining whether the resistance deviation between the connection confirmation resistance and the preset resistance is large. When the vehicle-mounted charger detects that the resistance deviation between the connection confirmation resistance and the preset resistance is within the preset deviation range, it may 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 resistance deviation between the connection confirmation resistance and the preset resistance is detected to be beyond the preset deviation range, it may 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 is disconnected. When it is determined that the connection state between the target vehicle and the discharge gun is abnormal, a 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, determining whether the control guide interface of the discharge gun is successfully matched with the vehicle socket.

[0093] It should be noted that the above control guidance interface may be an interface for establishing a communication connection between the discharge gun and the on-board charger.

[0094] In a specific implementation, when the connection state corresponding to the discharge gun is normal, the above-mentioned on-board charger can determine whether it has received a control guidance signal fed back by the discharge gun through the control guidance interface. When receiving the control guidance signal, it is determined that the control guidance interface of the discharge gun is successfully matched with the vehicle socket and the control guidance interface of the discharge gun is fully connected, that is, the discharge gun has been successfully identified and can be discharged through the discharge gun. Otherwise, it is determined that the control guidance interface of the discharge gun is not successfully matched with the vehicle socket, the discharge gun is not identified, and the discharge cannot be discharged through the discharge gun. Wherein, when it is determined that the control guidance interface is not fully connected, the discharge stop operation is executed, the V2V function is exited, and the target vehicle is not charged.

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

[0096] In a feasible implementation, step S203 may include steps S2031 to S2032:

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

[0098] It should be noted that the above-mentioned vehicle information unit may be a controller that collects and processes various information of the vehicle.

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

[0100] Step S2032: if the central locking signal is received, it is determined whether the control guide interface of the discharge gun is successfully matched with the vehicle socket.

[0101] In a specific implementation, when the on-board charger detects that the connection status is normal, it can first determine whether the vehicle information unit feeds back a central lock locking signal. When receiving the central lock locking signal fed back by the vehicle information unit, it determines that the electronic lock is locked. When the electronic lock is locked, the above-mentioned operation of determining whether the control guidance interface of the discharge gun is successfully matched with the vehicle socket can be performed, thereby maintaining the subsequent charging of the target vehicle in the state of electronic lock locking to ensure the safety of the charging process. For example, charging when the electronic lock is locked can avoid the door being accidentally opened during the charging process, thereby reducing the risk of damage to the power battery of the target vehicle.

[0102] Step S204: If the match is successful, the power information of the battery management system is obtained.

[0103] In a specific implementation, when the above-mentioned on-board charger finally detects that the control guidance interface of the discharge gun and the vehicle socket are successfully matched through the above-mentioned method, it can obtain the power information of the battery management system, and charge the power battery of the target vehicle through the corresponding charging signal output by the power information, thereby ensuring that the target vehicle is charged when the connection confirmation signal is normal, the electronic lock is locked, and the control guidance interface is fully connected, thereby ensuring the safety of the charging process.

[0104] For ease of understanding, please refer to Figure 4 , Figure 4 This is a schematic diagram of a brief process of the vehicle charger starting to discharge in the second embodiment of the vehicle charging method of this embodiment. Figure 4As shown, CC is used as the connection confirmation signal, CP interface is used as the control guide interface, 9V PWM output is used as the current PWM signal, and 6V PWM output is used as the target PWM signal for explanation. After activating the V2V function, if CC is abnormal, the discharge stop operation is performed. If CC is normal, when the VIU central lock is locked, confirm whether the CP interface is fully connected. If the CP interface is not fully connected, the discharge stop operation is performed. If the CP interface is fully connected, the switch is switched to 9V PWM output, and the target allowed current is obtained by canceling the current allowed current and the maximum allowed current of the BMS (i.e., the battery management system), and then the current PWM duty cycle is output, and PWM is changed to 6V (i.e., the 9V PWM output is switched to 6V PWM output). If PWM is not changed to 6V, the discharge stop operation is performed. After PWM becomes 6V, it is confirmed whether it is connected at high voltage. If it is not connected at high voltage, the discharge stop operation is performed. If it is connected at high voltage, after receiving the power demand information of TBox, the target allowed current is output according to the smaller 6V PWM signal and power demand information, that is, 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 those of the first and second embodiments can be referred to the above description, and will not be repeated in the following. Figure 5 , Figure 5 This is a flow chart of the third embodiment of the vehicle charging method of the present application.

[0106] In this embodiment, step S30 includes steps S301 to S305:

[0107] Step S301, determining the maximum allowable current of the battery management system according to the power information.

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

[0109] Step S302: taking the minimum value between the current allowed current and the maximum allowed current as the target allowed current.

[0110] It should be noted that the above-mentioned current allowable current may be the current value that the power battery can currently output.

[0111] In a specific implementation, the on-board charger can compare the current allowable current with the maximum allowable current, and take the minimum value between the current allowable current and the maximum allowable current as the target allowable current. That is, when the current allowable current is lower than the maximum allowable current, the current allowable current is taken as the target allowable current, and when the current allowable current is higher than or equal to the maximum allowable current, the maximum allowable current is taken as the target allowable current, so as to avoid the discharge output current exceeding the maximum allowable current and affecting the power battery.

[0112] Step S303: switch the current PWM signal to a target PWM signal with a preset amplitude.

[0113] It should be noted that the above current PWM signal may be a PWM signal corresponding to when the control guide interface is fully connected, and the amplitude may be 9V.

[0114] It is understandable that the above-mentioned preset amplitude may be an amplitude of a PWM signal suitable for the V2V function and supporting charging of the target vehicle, such as 6V.

[0115] In a specific implementation, the on-board charger may be provided with multiple switches, such as relays, which can output PWM signals of different amplitudes when different relays are closed. When the control guidance interface of the on-board charger is fully connected, the on-board charger can switch to the current PWM signal output (such as 9V PWM output) through the switch, and then after determining the target allowable current, switch the current PWM signal to the target PWM signal of the preset amplitude, so as to facilitate the subsequent use of the target PWM signal to charge the target vehicle.

[0116] Step S304, when currently in the high voltage connection state, receiving the power demand information of the target vehicle fed back by the intelligent vehicle terminal.

[0117] It should be noted that the high-voltage connection state may be the state in which the high-voltage battery system of the current vehicle is connected to the target vehicle. The high-voltage connection state can continuously and stably charge the target vehicle, thereby improving the charging efficiency and charging speed.

[0118] It is understandable that the above power demand information may be the current information and voltage information required for the target vehicle's current battery to be fully charged.

[0119] In a specific implementation, after switching the target PWM signal, the above-mentioned on-board charger can communicate with the intelligent on-board terminal and receive the power demand information of the target vehicle fed back by the intelligent on-board terminal, so as to charge the target vehicle based on the power demand information, thereby avoiding 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 high voltage connection state is not currently in place, the discharge stop operation is performed, the V2V function is exited, and the target vehicle is not charged.

[0121] Step S305 , outputting a charging signal to charge the power battery of the target vehicle through the target PWM signal, the target allowed current and the power demand information.

[0122] In a specific implementation, the above-mentioned on-board charger can control the internal charging circuit through the target PWM signal, convert the DC power of the power battery into an AC charging signal and output it to the power battery of the target vehicle. At the same time, the power of the output charging signal is controlled not to exceed the target allowable current, and charging is stopped after 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 in itself, or the temperature of the charging port reaches a preset temperature (such as 110°C), or the communication with the battery management system is lost for a preset period of time (such as 10s), the charging signal output will be turned off and the discharge stop operation will be executed to avoid the impact of its own fault, excessive charging temperature, or loss of communication with the battery management system on the current vehicle or target vehicle.

[0124] Furthermore, when the on-board charger itself is not faulty, the charging port temperature has not reached the preset temperature, and the communication with the battery management system has not been lost, if the control guidance interface is detected to be half-connected (such as the connection of the discharge gun on the vehicle socket is loose), the discharge stop operation is executed to reduce safety hazards. When the control guidance interface is detected to be fully connected, if the target PWM signal is detected to be switched to the original current PWM signal, the discharge stop operation is executed to avoid outputting erroneous AC signals and affecting the target vehicle. If it is detected that the target PWM signal has not been switched to the original PWM signal, the charging process is continued.

[0125] In a feasible implementation manner, step S305 further includes steps S306 to S308:

[0126] Step S306, during the charging process, determining whether the intelligent vehicle-mounted terminal feeds back function shutdown requirement information or discharge limit information.

[0127] It should be noted that the above function shut down requirement information may be information for stopping the charging process.

[0128] It is understandable that the above discharge limit value information may be information on reaching the upper limit of the target vehicle current. The discharge limit value information may be manually set by the user, and when not set, the charging process may be controlled based on the above power demand information.

[0129] Step S3061, when the intelligent vehicle terminal does not feedback the function shutdown requirement information and the discharge limit information, if a central lock locking signal fed back by the 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 a target PWM signal with a preset amplitude.

[0131] In a specific implementation, the user can actively input function shutdown requirement information or discharge limit information on the smart vehicle terminal to actively control the charging process. When the above-mentioned on-board charger detects the function shutdown requirement information or discharge limit information fed back by the smart vehicle terminal, it can stop the AC signal output. On the contrary, if the function shutdown requirement information and discharge limit information are not received, the charging process will continue. During the charging process, if the central control lock locking signal is received, it is determined that the electronic lock has been unlocked. In order to ensure the safety of the charging process, the electronic lock can be controlled to lock and continue charging. If the central control lock locking signal is not received, it is determined that the electronic lock is still in a locked state and the charging process will continue.

[0132] For ease of understanding, please refer to Figure 6 , Figure 6 FIG. 1 is a schematic diagram of a brief flow chart of the discharge process of the on-board charger in the third embodiment of the vehicle charging method of this embodiment. Figure 6 As shown, 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 duration for explanation. After the on-board charger outputs the smaller target allowable current, during the discharge process, if an OBC (on-board charger) fault is detected that requires charging to be stopped, or the charging port temperature reaches 110℃, or the communication with the BMS (battery management system) is lost for 10s, the discharge stop operation is performed after the AC output is turned off. Otherwise, continue to detect whether CC is half-connected; if CC is half-connected, determine that the control guidance interface is half-connected, and perform the discharge stop operation after turning off the AC output. If CC is fully connected, continue to confirm whether PWM becomes 9V again; if PWM becomes 9V again, the discharge stop operation is performed after the AC output is turned off. If it does not change to 9V, that is, it is still at 6V, then when CC is not connected (that is, whether the discharge gun is disconnected from the vehicle socket), or when a function shutdown request information is received, or a discharge limit information is received, the discharge stop operation is performed after the AC output is turned off; when CC is connected and no function shutdown request information and discharge limit information are received, it is determined whether the VIU central lock is equal to locked (that is, whether the central lock locking signal fed back by the vehicle information unit is received). If not, the target allowed current output is executed after the reduction, and the discharge continues. If so, the electronic lock is controlled to be locked and the target allowed current output is executed after the reduction, and the discharge continues.

[0133] Furthermore, after step S306, steps A3061 to A3064 may be included:

[0134] Step A3061, when the intelligent vehicle terminal feeds back the function shutdown requirement 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, upon receiving function shutdown requirement information or discharge limit information fed back by the intelligent vehicle terminal, the on-board charger performs a discharge stop operation and stops outputting a charging signal to charge the power battery of the target vehicle.

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

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

[0138] Step A3063: If a central lock unlocking signal fed back by the vehicle information unit is received, the electronic lock is controlled to unlock according to the central lock unlocking signal.

[0139] Step A3064, when the electronic lock is unlocked, disconnect the high voltage connection state and enter the sleep state.

[0140] In a specific implementation, when the charging signal stops outputting, the on-board charger can detect the electronic lock finger, 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 by the central lock unlocking signal, and when the central lock unlocking signal is not received, it is in a waiting state. After the electronic lock is unlocked, the high-voltage connection can be disconnected, the high-voltage connection state can be exited, and the dormant state can be entered when there is no other wake-up source, thereby exiting the V2V function and completing the entire charging process.

[0141] For ease of understanding, please refer to Figure 7 , Figure 7 This is a schematic diagram of a simplified process of stopping the discharge of the on-board charger in the third embodiment of the vehicle charging method of this embodiment. Figure 7As shown, VIU is used as a vehicle information unit for explanation. When the discharge stop operation is executed, it is detected whether the electronic lock is locked. If the electronic lock is locked, it is determined whether the VIU central lock is unlocked (i.e., the central lock unlocking signal is received). If not, it returns to the step of detecting whether the electronic lock is locked, and continues to obtain. If so, the electronic lock is controlled to unlock; after the electronic lock is unlocked, it is determined whether the high voltage is disconnected and there is no other wake-up source. If so, it goes into sleep mode. If not, the judgment process is repeated until the judgment conditions are met and the vehicle charger goes into sleep mode, so as to ensure that the vehicle charger goes into sleep mode when there is no high voltage disconnection and other wake-up sources, thereby improving safety performance.

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

[0143] This application also provides a vehicle charging device, please refer to Figure 8 , Figure 8 This is a schematic diagram of the module structure of the vehicle charging device of this application.

[0144] like Figure 8 As shown, the vehicle charging device proposed in the embodiment of the present application includes:

[0145] The intelligent vehicle terminal communication module 10 is used to determine whether the intelligent vehicle terminal feeds back a discharge request when a target vehicle requiring power supply is connected, and the discharge request is triggered by a 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 charge the target vehicle by outputting a charging signal corresponding to 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 complicated, the V2V function needs to wait for a certain period of time to complete the signal interaction before charging can start, and the user experience is not good. Compared with the prior art, the beneficial effects of the vehicle charging device provided by the present application are the same as the beneficial effects of the vehicle charging method provided by the above embodiment, and the other technical features of the vehicle charging device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0149] The present application provides a vehicle-mounted 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, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle charging method in the above-mentioned embodiment 1.

[0150] Reference below Fig. 9 , Fig. 9 This is a schematic diagram of the hardware operating environment structure of the on-board charger involved in the vehicle charging method in the embodiment of the present application. Fig. 9 The vehicle-mounted charger shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0151] like Fig. 9 As shown, the on-board charger may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the on-board charger are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other 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: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the on-board charger to communicate with other devices (such as an intelligent on-board terminal or a battery management system) wirelessly or wired to exchange data. Although the figure shows an on-board charger with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided 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, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0153] The on-board charger provided by this application adopts the vehicle charging method in the above embodiment, which can solve the technical problems of the complicated discharge process of the prior art, the need to wait for a certain period of time to complete the signal interaction before starting charging after the V2V function is activated, and the poor user experience. Compared with the prior art, the beneficial effects of the on-board charger provided by this application are the same as the beneficial effects of the vehicle charging method provided by the above embodiment, and the other technical features of the on-board charger are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

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

[0155] The electric vehicle provided by the present application can solve the technical problems of the prior art, such as the complicated discharge process, the need to wait for a certain period of time to complete the signal interaction before charging can start after the V2V function is activated, and the poor user experience. Compared with the prior art, the beneficial effects of the electric vehicle provided by the present application are the same as the beneficial effects of the vehicle charging method provided by the above embodiment, which will not be elaborated here.

[0156] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above 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. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0158] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle charging method, characterized in that: The method is applied to a vehicle-mounted charger, and the method comprises: When the target vehicle to be powered is connected, determining whether the intelligent vehicle terminal feeds back a discharge request, wherein the discharge request is triggered by a user on the intelligent vehicle terminal; If yes, then obtain the power information of the battery management system; The power battery of the target vehicle is charged by outputting a charging signal corresponding to the power information.

2. The vehicle charging method according to claim 1, characterized in that: If so, the step of obtaining the power information of the battery management system includes: If yes, a connection confirmation signal is obtained, wherein the connection confirmation signal is triggered when the target vehicle is connected via a discharge gun; Determining whether the connection status between the target vehicle and the discharge gun is normal according to the connection confirmation signal; When the connection state is normal, determining whether the control guide interface of the discharge gun is successfully matched with the vehicle socket; If the match is successful, the power information of the battery management system is obtained.

3. The vehicle charging method according to claim 2, characterized in that: 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: Determine a connection confirmation resistance value corresponding to the connection confirmation signal; Determining whether a resistance deviation between the connection confirmation resistance and a preset resistance is within a preset deviation range; If it 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 in that: When the connection state is normal, the step of judging whether the control guide interface of the discharge gun is successfully matched with the vehicle socket comprises: When the connection state is normal, determining whether the vehicle information unit feeds back a central locking signal; If the central lock locking signal is received, it is determined whether the control guide interface of the discharge gun is successfully matched with the vehicle socket.

5. The vehicle charging method according to claim 1, characterized in that: The step of charging the power battery of the target vehicle by outputting a charging signal corresponding to the power information includes: Determining a maximum allowable current of the battery management system according to the power information; taking the minimum value between the current allowed current and the maximum allowed current as the target allowed current; Switch the current PWM signal to a target PWM signal of a preset amplitude; When currently in a high-voltage connection state, receiving power demand information of the target vehicle fed back by the intelligent vehicle terminal; A charging signal is outputted through the target PWM signal, the target allowed current and the power demand information to charge the power battery of the target vehicle.

6. The vehicle charging method according to claim 5, characterized in that: After the step of outputting a charging signal to charge the power battery of the target vehicle by using the target PWM signal, the target allowed current and the power demand information, the method further includes: During the charging process, determining whether the intelligent vehicle terminal feeds back function shutdown requirement information or discharge limit information; When the intelligent vehicle terminal does not feedback the function shutdown requirement information and the discharge limit value information, if a central lock locking signal fed back by the vehicle information unit is received, the electronic lock is controlled to be locked; When the electronic lock is locked, the process returns to the step of switching the current PWM signal to a target PWM signal with a preset amplitude.

7. The vehicle charging method according to claim 6, characterized in that: After the step of determining whether the intelligent vehicle-mounted terminal feeds back function shutdown requirement information or discharge limit value information during the charging process, the method further includes: When the intelligent vehicle-mounted terminal feeds back the function shut-down requirement information or the discharge limit value information, stop outputting the charging signal to charge the power battery of the target vehicle; When the charging signal stops being output, determining whether a central lock unlocking signal fed back by a vehicle information unit is received; If a central lock unlocking signal fed back by the vehicle information unit is received, the electronic lock is controlled to unlock according to the central lock unlocking signal; When the electronic lock is unlocked, the high voltage connection state is disconnected and the dormant state is entered.

8. A vehicle charging device, characterized in that: The device comprises: The intelligent vehicle terminal communication module is used to determine whether the intelligent vehicle terminal feeds back a discharge request when the target vehicle to be powered is connected, and the discharge request is triggered by the user on the intelligent vehicle terminal; A battery management system communication module is used to obtain power information of the battery management system if yes; The vehicle charging module is used to charge the target vehicle by outputting a charging signal corresponding to the power information.

9. A vehicle-mounted charger, characterized in that: The on-board charger comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle charging method according to any one of claims 1 to 7.

10. An electric vehicle, characterized in that: The electric vehicle comprises a charger, in which a computer program is arranged, and when the computer program is executed by a processor, the steps of the vehicle charging method according to any one of claims 1 to 7 are implemented.

Images