Control method and system for discharging in vehicle

Abstract

The invention discloses an in-vehicle discharge control method and system, and belongs to the technical field of battery discharge control. The method comprises the steps that a vehicle-mounted charger of the new energy vehicle sends a load connection signal to a vehicle-mounted infotainment host and sends the load connection signal and a charging request to a vehicle control unit of the new energy vehicle under the condition that insertion of load equipment is detected, and the load connection signal is used for indicating that the load equipment is inserted into the vehicle-mounted charger; the vehicle-mounted information entertainment host receives the load connection signal and controls the in-vehicle discharging function of the new energy vehicle to be started; the vehicle control unit receives the load connection signal and the charging request, and sends a first discharging instruction to the vehicle-mounted charger when determining that the new energy vehicle meets the discharging condition; and the vehicle-mounted charger receives the first discharging instruction and outputs direct current output by a power battery of the new energy vehicle to load equipment. According to the method, the safety and efficiency of in-vehicle discharging are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of battery discharge control, and in particular to a method and system for controlling in-vehicle discharge. Background Art

[0002] With the rapid development of new energy vehicles, on-board power battery technology has made continuous breakthroughs, and the energy density and capacity of on-board power batteries have continued to increase. This not only provides new energy vehicles with a longer driving range, but also makes the surplus electricity of on-board power batteries gradually become a usable mobile resource, giving rise to the widespread application demand for in-vehicle discharge functions.

[0003] The in-vehicle discharge function allows users to provide power to external devices (such as household appliances) when the new energy vehicle meets the discharge conditions, without affecting the normal power supply of key vehicle functions such as the instrument panel and the main display. This greatly expands the application scenarios of new energy vehicles. Therefore, how to control the in-vehicle discharge of new energy vehicles is an urgent problem to be solved. Summary of the Invention

[0004] The present application provides a method and system for controlling in-vehicle discharge. The technical solution is as follows:

[0005] In one aspect, an embodiment of the present application provides a method for controlling in-vehicle discharge, the method comprising:

[0006] When the on-board charger of the new energy vehicle detects that a load device is plugged in, it sends a load connection signal to the on-board infotainment host of the new energy vehicle and sends the load connection signal and a charging request to the vehicle control unit of the new energy vehicle. The load connection signal is used to indicate that the load device has been plugged in to the on-board charger, and the charging request is used to indicate a request to charge the load device.

[0007] The in-vehicle infotainment host receives the load connection signal and controls the in-vehicle discharge function of the new energy vehicle to be turned on;

[0008] The vehicle control unit receives the load connection signal and the charging request, and sends a first discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge condition;

[0009] The on-board charger receives the first discharge instruction and outputs the direct current output by the power battery of the new energy vehicle to the load device.

[0010] In a possible implementation, before sending the first discharge instruction to the onboard charger, the method further includes:

[0011] The vehicle control unit obtains the current gear position of the new energy vehicle and the current remaining power ratio of the power battery;

[0012] The vehicle control unit determines that the new energy vehicle meets the discharge condition when the current gear meets the gear requirement and the current remaining power ratio is greater than the ratio threshold;

[0013] The vehicle control unit determines that the new energy vehicle does not meet the discharge condition when at least one of the current gear meets the gear requirement and the current remaining power ratio is greater than the ratio threshold is not met.

[0014] In a possible implementation, the current gear meets the gear requirement, including any of the following:

[0015] The current gear is the accessory power gear;

[0016] The current gear is the full vehicle power gear, and the high-voltage system of the new energy vehicle is ready;

[0017] The current gear is the full vehicle power gear, and the power transmission system of the new energy vehicle is ready.

[0018] In a possible implementation, the method further includes:

[0019] The vehicle control unit determines a first discharge power and sends the first discharge power to the on-board charger;

[0020] The on-board charger receives the first discharge power and outputs the direct current output by the power battery of the new energy vehicle to the load device according to the first discharge power.

[0021] In a possible implementation, determining the first discharge power includes:

[0022] Obtaining the maximum allowable discharge power of the power battery;

[0023] Obtaining the maximum output power of the on-board charger;

[0024] Obtaining the current required power of the load device;

[0025] Determining the difference between the total available power of the power battery and the reserved power of the new energy vehicle;

[0026] The minimum value among the maximum allowable discharge power of the power battery, the maximum output power of the on-board charger, the current required power of the load device and the difference power is used as the first discharge power.

[0027] In one possible implementation, after the onboard charger receives the first discharge instruction and outputs the direct current output by the power battery of the new energy vehicle to the load device, the method further includes:

[0028] The in-vehicle infotainment host displays a control corresponding to the in-vehicle discharge function, and the control corresponding to the in-vehicle discharge function is in an on state;

[0029] In response to a triggering operation on a control corresponding to the in-vehicle discharge function, the in-vehicle infotainment host sends a first shutdown instruction to the vehicle control unit, where the first shutdown instruction is used to indicate that the in-vehicle discharge function has been turned off;

[0030] The vehicle control unit receives the first shutdown instruction and sends a stop discharge instruction to the on-board charger;

[0031] The on-board charger receives the stop-discharging instruction and stops outputting the direct current outputted from the power battery of the new energy vehicle to the load device.

[0032] In a possible implementation, after the onboard charger receives the stop-discharge instruction and stops outputting the DC power output by the power battery of the new energy vehicle to the load device, the method further includes:

[0033] The in-vehicle infotainment host displays a control corresponding to the in-vehicle discharge function, and the control corresponding to the in-vehicle discharge function is in an off state;

[0034] In response to a triggering operation of a control corresponding to the in-vehicle discharge function, the in-vehicle infotainment host sends a first activation instruction to the vehicle control unit, where the first activation instruction is used to indicate that the in-vehicle discharge function has been activated;

[0035] The vehicle control unit receives the first start instruction and sends a second discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge conditions;

[0036] The on-board charger receives the second discharge instruction and outputs the direct current output by the power battery of the new energy vehicle to the load device.

[0037] In a possible implementation, the method further includes:

[0038] The on-board charger sends the load connection signal to the vehicle instrument of the new energy vehicle;

[0039] The vehicle meter receives the load connection signal and displays a first icon, where the first icon is used to indicate that the on-board charger is connected to the load device.

[0040] In a possible implementation, the method further includes:

[0041] The on-board charger sends discharge information to the on-board infotainment host and the vehicle instrument, wherein the discharge information is used to indicate that the power battery is discharging to the load device;

[0042] The in-vehicle infotainment host receives the discharge information and displays a second icon, where the second icon is used to indicate that the power battery is discharging;

[0043] The vehicle meter receives the discharge information and displays a discharge gun indicator light in the vehicle meter as a target color. The discharge gun indicator light displays the target color to indicate that the power battery is discharging.

[0044] On the other hand, an embodiment of the present application provides a control system for in-vehicle discharge, the system comprising an on-board charger, an on-board infotainment host, and a vehicle control unit of a new energy vehicle;

[0045] The on-board charger is configured to, upon detecting that a load device is plugged in, send a load connection signal to the on-board infotainment host, and send the load connection signal and a charging request to the vehicle control unit, wherein the load connection signal is used to indicate that the load device has been plugged in to the on-board charger, and the charging request is used to indicate a request to charge the load device;

[0046] The in-vehicle infotainment host is configured to receive the load connection signal and control the in-vehicle discharge function of the new energy vehicle to be turned on;

[0047] The vehicle control unit is configured to receive the load connection signal and the charging request, and send a first discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge conditions;

[0048] The on-board charger is further configured to receive the first discharge instruction and output the direct current outputted by the power battery of the new energy vehicle to the load device.

[0049] The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

[0050] The technical solution provided in the embodiment of the present application realizes an automated discharge control process after the load device is connected to the on-board charger through the coordinated cooperation between the on-board charger, the on-board infotainment host and the vehicle control unit of the new energy vehicle. It not only ensures that the discharge function is accurately turned on when the load device is connected, but also confirms the discharge conditions through the vehicle control unit to ensure the safety of the discharge process. At the same time, with the help of signal interaction between various components, the reliability and response efficiency of the discharge function are improved, making the in-vehicle discharge operation of the new energy vehicle more intelligent, safe and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0052] Figure 1 Schematic diagram of an implementation environment of a method for controlling in-vehicle discharge provided by an embodiment of the present application;

[0053] Figure 2 This is a flow chart of a method for controlling in-vehicle discharge provided by an embodiment of the present application;

[0054] Figure 3 This is a schematic diagram of an in-vehicle discharge control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0056] It should be noted that the terms "first," "second," and the like in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0057] Figure 1 FIG. 1 is a schematic diagram of an implementation environment of a method for controlling in-vehicle discharge provided by an embodiment of the present application. Figure 1As shown, the implementation environment includes: a new energy vehicle 101, wherein the new energy vehicle 101 includes an on-board charger (On-Board Charger, OBC) 102, an in-vehicle infotainment head unit (In-Vehicle Infotainment Head Unit / Infotainment Head Unit, IHU) 103, a vehicle control unit (Hybrid Control Unit, HCU) 104 and a vehicle instrument (Instrument Cluster Module, ICM) 105.

[0058] The onboard charger 102 refers to the charging device installed on the new energy vehicle 101. The onboard infotainment host 103 is the core control terminal in the new energy vehicle 101, integrating multimedia, navigation, and communication functions. It provides in-vehicle entertainment and information services to users through touch screens and voice interaction. The vehicle control unit 104 coordinates the operating status of the power system, including the engine, motor, and power battery, optimizing energy distribution for efficient driving and energy recovery. The vehicle instrument panel 105 is the core control unit of the dashboard in the cockpit of the new energy vehicle 101, responsible for displaying vehicle status information such as speed, RPM, fuel level, and water temperature.

[0059] When the on-board charger 102 detects that a load device is plugged in, it sends a load connection signal to the on-board infotainment host 103 and the vehicle instrument 105, and sends a load connection signal and a charging request to the vehicle control unit 104. The load connection signal is used to indicate that the load device has been plugged in to the on-board charger 102, and the charging request is used to indicate a request to charge the load device.

[0060] The vehicle meter 105 receives the load connection signal and displays a first icon, where the first icon is used to indicate that the on-board charger 102 is connected to the load device.

[0061] The in-vehicle infotainment host 103 receives the load connection signal and controls the in-vehicle discharge function of the new energy vehicle 101 to start.

[0062] The vehicle control unit 104 receives the load connection signal and the charging request, and sends a first discharge instruction to the on-board charger 102 when determining that the new energy vehicle 101 meets the discharge conditions.

[0063] The onboard charger 102 receives the first discharge instruction and outputs the direct current output from the power battery of the new energy vehicle 101 to the load device.

[0064] The present application provides a method for controlling in-vehicle discharge, which can be applied to the above Figure 1 The implementation environment shown is Figure 2As an example, the flow chart of a method for controlling in-vehicle discharge provided by an embodiment of the present application is shown in FIG. Figure 1 The new energy vehicle 101 includes an onboard charger 102, an onboard infotainment host 103, a vehicle control unit 104 and a vehicle meter 105. Figure 2 As shown, the method includes the following steps 201 to 216.

[0065] In step 201 , upon detecting that a load device is plugged in, the on-board charger sends a load connection signal to the on-board infotainment host and the vehicle instrument, and sends a load connection signal and a charging request to the vehicle control unit.

[0066] The load connection signal is used to indicate that the load device has been plugged into the on-board charger, and the charging request is used to indicate a request to charge the load device.

[0067] In one possible implementation, when a user plugs a load device into the on-board charger, the on-board charger can detect the insertion of the load device. Upon detecting the insertion of the load device, the on-board charger does not restrict the order in which it sends the load connection signal to the on-board infotainment host and the vehicle instrument cluster, and then to the vehicle control unit. Alternatively, the on-board charger may first send the load connection signal to the on-board infotainment host, then to the vehicle control unit, and finally to the vehicle instrument cluster. Alternatively, the on-board charger may first send the load connection signal to the vehicle control unit, then to the vehicle instrument cluster, and finally to the on-board infotainment host.

[0068] In one possible implementation, the onboard charger also needs to send a charging request to the vehicle control unit. The charging request is a jump signal. The onboard charger can first send a load connection signal to the vehicle control unit, and then send the charging request to the vehicle control unit.

[0069] In one possible implementation, the on-board charger sends a load connection signal to the on-board infotainment host and vehicle instrument through the CAN (Controller Area Network, a serial communication protocol used in the field of vehicle and industrial control) line, and sends a load connection signal and charging request to the vehicle control unit.

[0070] In step 202 , the vehicle meter receives a load connection signal and displays a first icon.

[0071] In a possible implementation, after the vehicle meter receives the load connection signal sent by the on-board charger, the vehicle meter displays a first icon, where the first icon is used to indicate that the on-board charger is connected to the load device.

[0072] In step 203 , the in-vehicle infotainment host receives the load connection signal and controls the in-vehicle discharge function of the new energy vehicle to be turned on.

[0073] In a possible implementation, after the in-vehicle infotainment host receives the load connection signal sent by the on-board charger, it controls the in-vehicle discharge function of the new energy vehicle to be turned on.

[0074] In this implementation, after the in-vehicle infotainment host receives the load connection signal, it automatically turns on the in-vehicle discharge function without the need for the user to manually turn it on, making the in-vehicle discharge process simpler and the in-vehicle discharge efficiency higher.

[0075] In step 204 , the vehicle control unit receives the load connection signal and the charging request, and determines whether the new energy vehicle meets the discharge conditions.

[0076] In one possible implementation, the onboard charger first sends a load connection signal to the vehicle control unit and then sends a charge request to the vehicle control unit. Therefore, the vehicle control unit first receives the load connection signal and then the charge request. After receiving the load connection signal and the charge request, the vehicle control unit determines whether the new energy vehicle meets the discharge conditions. This embodiment of the application does not limit the process by which the vehicle control unit determines whether the new energy vehicle meets the discharge conditions.

[0077] Optionally, the process of the vehicle control unit determining whether the new energy vehicle meets the discharge condition includes: the vehicle control unit obtaining the current gear position of the new energy vehicle and the current remaining power ratio of the power battery; if the current gear position meets the gear position requirement and the current remaining power ratio is greater than a ratio threshold, determining that the new energy vehicle meets the discharge condition. If the current gear position does not meet the gear position requirement, or if the current remaining power ratio is not greater than the ratio threshold, determining that the new energy vehicle does not meet the discharge condition.

[0078] The percentage threshold is set based on experience or flexibly adjusted according to the implementation environment, which is not limited in the present embodiment.

[0079] In one possible implementation, a new energy vehicle includes a gear position sensor, and a vehicle control unit communicates with the gear position sensor via a wired or wireless network. The vehicle control unit sends a gear position acquisition request to the gear position sensor, which is used to obtain the current gear position of the new energy vehicle. After receiving the gear position acquisition request, the gear position sensor returns the current gear position of the new energy vehicle to the vehicle control unit, so that the vehicle control unit can obtain the current gear position of the new energy vehicle.

[0080] In one possible implementation, the power battery sends the remaining power percentage of the power battery to the vehicle control unit in real time. After the vehicle control unit receives the charging request, the vehicle control unit uses the remaining power percentage received when the charging request is received as the current remaining power percentage of the power battery.

[0081] In another possible implementation, the vehicle control unit may also send a request to obtain the remaining power percentage to the power battery, and the remaining power percentage acquisition request is used to obtain the current remaining power percentage of the power battery; after the power battery receives the remaining power percentage acquisition request, it returns the current remaining power percentage of the power battery to the vehicle control unit, so that the vehicle control unit obtains the current remaining power percentage of the power battery.

[0082] In one possible implementation, after the vehicle control unit obtains the current gear of the new energy vehicle and the current remaining power ratio of the power battery, there are three ways to determine whether the current gear meets the gear requirements: when the current gear is the accessory power gear (Accessory Power Mode, ACC gear), it is determined that the current gear meets the gear requirements; when the current gear is the full vehicle power gear (ON gear) and the high-voltage system of the new energy vehicle is ready (High-Voltage System Ready, HVReady), it is determined that the current gear meets the gear requirements; when the current gear is the full vehicle power gear and the powertrain system of the new energy vehicle is ready (Powertrain System Ready, PTReady), it is determined that the current gear meets the gear requirements.

[0083] In step 205 , the vehicle control unit determines a first discharge power when determining that the new energy vehicle meets the discharge condition.

[0084] In one possible implementation, when the vehicle control unit determines that the new energy vehicle meets the discharge conditions, the process of determining the first discharge power includes: obtaining the maximum allowable discharge power of the power battery; obtaining the maximum output power of the on-board charger; obtaining the current required power of the load device; determining the difference power between the total available power of the power battery and the reserved power of the new energy vehicle; and using the minimum value of the maximum allowable discharge power of the power battery, the maximum output power of the on-board charger, the current required power of the load device, and the difference power as the first discharge power.

[0085] In one possible implementation, a process for a vehicle control unit to obtain the maximum allowable discharge power of a power battery includes: the vehicle control unit sending a first acquisition request to the power battery, where the first acquisition request is used to obtain the maximum allowable discharge power of the power battery. After receiving the first acquisition request, the power battery returns the maximum allowable discharge power of the power battery to the vehicle control unit, so that the vehicle control unit obtains the maximum allowable discharge power of the power battery.

[0086] The process of the vehicle control unit obtaining the maximum output power of the on-board charger includes: the vehicle control unit sending a second acquisition request to the on-board charger, the second acquisition request being used to obtain the maximum output power of the on-board charger. After receiving the second acquisition request, the on-board charger returns the maximum output power of the on-board charger to the vehicle control unit, so that the vehicle control unit obtains the maximum output power of the on-board charger.

[0087] The process of the vehicle control unit obtaining the current required power of the load device includes: the vehicle control unit sends a third acquisition request to the on-board charger, the third acquisition request is used to obtain the current required power of the load device, after the on-board charger receives the third acquisition request, it interacts with the load device to obtain the current required power of the load device, and the on-board charger sends the current required power of the load device to the vehicle control unit, so that the vehicle control unit obtains the current required power of the load device.

[0088] The process of the vehicle control unit obtaining the total available power of the power battery includes: the vehicle control unit sending a fourth acquisition request to the power battery, where the fourth acquisition request is used to obtain the total available power of the power battery. After receiving the fourth acquisition request, the power battery returns the total available power of the power battery to the vehicle control unit, so that the vehicle control unit obtains the total available power of the power battery.

[0089] The vehicle control unit stores the reserved power of new energy vehicles. The reserved power of new energy vehicles refers to the power to ensure the normal operation of new energy vehicles.

[0090] In another possible implementation, if the vehicle control unit determines that the new energy vehicle does not meet the discharge conditions, the vehicle control unit determines the reason why the new energy vehicle does not meet the discharge conditions, sends the reason to the in-vehicle infotainment host and the vehicle instrument panel, and the in-vehicle infotainment host and the vehicle instrument panel display the reason. This allows the vehicle's occupants to know that the new energy vehicle does not meet the discharge conditions and the reason why the new energy vehicle does not meet the discharge conditions by viewing the in-vehicle infotainment host and the vehicle instrument panel.

[0091] In one possible implementation, when the reason why the new energy vehicle does not meet the discharge conditions is that the remaining power ratio of the power battery is not greater than the ratio threshold, the on-board infotainment host and the vehicle instrument can also display an adjustment control, and the adjustment control is used to adjust the ratio threshold to lower the ratio threshold so that the remaining power ratio of the power battery is greater than the adjusted ratio threshold, so that the load equipment can be charged by the power battery.

[0092] In step 206 , the vehicle control unit sends a first discharge instruction and a first discharge power to the on-board charger.

[0093] In one possible implementation, the vehicle control unit may send a first discharge instruction to the onboard charger if it is determined in step 204 that the new energy vehicle meets the discharge conditions, and after determining the first discharge power in step 205, send the first discharge power to the onboard charger. Alternatively, after determining the first discharge power in step 205, the first discharge instruction and the first discharge power may be sent to the onboard charger. This embodiment of the present application does not limit the timing of sending the first discharge instruction and the first discharge power.

[0094] In step 207 , the on-board charger receives the first discharge instruction and the first discharge power, and outputs the direct current output by the power battery of the new energy vehicle to the load device according to the first discharge power.

[0095] In one possible implementation, after receiving the first discharge instruction and the first discharge power, the on-board charger outputs the direct current output by the power battery of the new energy vehicle to the load device according to the first discharge power, so as to charge the load device through the power battery of the new energy vehicle.

[0096] In step 208 , the onboard charger sends discharge information to the onboard infotainment host and the vehicle instrument panel.

[0097] In one possible implementation, after the on-board charger outputs the DC power output from the power battery of the new energy vehicle to the load device, it also sends discharge information to the on-board infotainment host and the vehicle instrument. The discharge information is used to indicate that the power battery is discharging to the load device. The embodiment of the present application does not limit the order in which the on-board charger sends the discharge information to the on-board infotainment host and the vehicle instrument. The on-board charger can first send the discharge information to the on-board infotainment host and then send the discharge information to the vehicle instrument; it can also first send the discharge information to the vehicle instrument and then send the discharge information to the on-board infotainment host; it can also send the discharge information to the on-board infotainment host and the vehicle instrument at the same time.

[0098] In step 209 , the in-vehicle infotainment host receives the discharge information and displays a second icon.

[0099] In one possible implementation, after receiving the discharge information, the in-vehicle infotainment host displays a second icon indicating that the power battery is discharging. In this way, the driver and passengers in the vehicle can know that the power battery is discharging by checking the in-vehicle infotainment host.

[0100] In step 210 , the vehicle meter receives the discharge information and displays the discharge gun indicator light in the vehicle meter as the target color.

[0101] In one possible implementation, after receiving the discharge information, the vehicle instrument panel may also display the discharge gun indicator light in the vehicle instrument panel in a target color. The discharge gun indicator light in the target color indicates that the power battery is discharging. In this way, the driver and passengers in the vehicle can know that the power battery is discharging by checking the vehicle instrument panel.

[0102] The target color can be any color, which is not limited in the present embodiment. For example, the target color is blue.

[0103] In step 211, the in-vehicle infotainment host displays the control corresponding to the in-vehicle discharge function, which is in an on state, and sends a first off instruction to the vehicle control unit in response to a triggering operation on the control corresponding to the in-vehicle discharge function.

[0104] In one possible implementation, a setting control is displayed in the in-vehicle infotainment host, and the setting control is used to display a setting page. In response to a triggering operation on the setting control, the setting page is displayed, and the setting page displays a control corresponding to the in-vehicle discharge function. Since the in-vehicle discharge function is controlled to be turned on in the above step 203, the control corresponding to the in-vehicle discharge function is in an on state; in response to a triggering operation on the control corresponding to the in-vehicle discharge function, the in-vehicle discharge function is controlled to be turned off, and a first closing instruction is sent to the vehicle control unit, and the first closing instruction is used to indicate that the in-vehicle discharge function has been turned off.

[0105] Among them, the triggering operation for the setting control includes but is not limited to the clicking operation for the setting control. The triggering operation for other contents is similar to the triggering operation for the setting control, and the embodiment of the present application will not be repeated here.

[0106] In this implementation, during the process of the power battery charging the load device, the user can stop the power battery from charging the load device by manually turning off the in-vehicle discharge function.

[0107] In another possible implementation, the user can also stop the power battery from charging the load device by disconnecting the load device from the onboard charger. The vehicle control unit stops the power battery from charging the load device if it determines that the new energy vehicle does not meet the discharge requirements.

[0108] Optionally, when the user disconnects the load device from the onboard charger, the onboard charger stops supplying DC power from the new energy vehicle's power battery. When the vehicle control unit determines that the new energy vehicle does not meet discharge requirements, the vehicle control unit sends a stop-discharge instruction to the onboard charger. Upon receiving the stop-discharge instruction, the onboard charger stops supplying DC power from the new energy vehicle's power battery to the load device.

[0109] In step 212 , the vehicle control unit receives the first shutdown instruction and sends a stop-discharging instruction to the on-board charger.

[0110] In a possible implementation, after receiving the first shutdown instruction, the vehicle control unit sends a stop-discharging instruction to the on-board charger.

[0111] Optionally, the vehicle control unit may send a stop-discharge instruction to the on-board charger immediately after receiving the first shutdown instruction, or may send a stop-discharge instruction to the on-board charger after staying for a target time, which is not limited in this embodiment of the present application. The target time is set based on experience or flexibly adjusted according to the implementation environment, which is not limited in this embodiment of the present application. For example, the target time is 0.3 seconds.

[0112] In step 213 , the on-board charger receives the stop-discharge instruction and stops outputting the DC power output from the power battery of the new energy vehicle to the load device.

[0113] In a possible implementation, after receiving the stop-discharge instruction, the on-board charger stops outputting the direct current output from the power battery of the new energy vehicle to the load device.

[0114] After receiving the stop discharge instruction, the on-board charger can also send a stop discharge message to the on-board infotainment host and the vehicle instrument. The stop discharge information is used to instruct the power battery to stop discharging to the load device, so that the on-board infotainment host cancels the display of the second icon, and the vehicle instrument displays the discharge gun indicator light in the vehicle instrument in the first color. The discharge gun indicator light displayed in the first color is used to indicate that the power battery is not discharged.

[0115] The first color is set based on experience or is flexibly adjusted according to the implementation environment, which is not limited in the embodiments of the present application. The first color is different from the target color. For example, the first color is gray.

[0116] In step 214, the in-vehicle infotainment host displays the control corresponding to the in-vehicle discharge function, which is in an off state. In response to a triggering operation on the control corresponding to the in-vehicle discharge function, a first turn-on instruction is sent to the vehicle control unit. The first turn-on instruction is used to indicate that the in-vehicle discharge function has been turned on.

[0117] In a possible implementation, when the user stops the power battery from charging the load device by turning off the in-vehicle discharge function, the user can also enable the power battery to continue charging the load device by turning on the in-vehicle discharge function.

[0118] Optionally, a setting control is displayed in the in-vehicle infotainment host, and the setting control is used to display a setting page. In response to a triggering operation on the setting control, the setting page is displayed, and the control corresponding to the in-vehicle discharge function is displayed on the setting page. Since the user turns off the in-vehicle discharge function in the above step 211, the control corresponding to the in-vehicle discharge function is in an off state; in response to a triggering operation on the control corresponding to the in-vehicle discharge function, the in-vehicle discharge function is controlled to be turned on, and a first turn-on instruction is sent to the vehicle control unit, and the first turn-on instruction is used to indicate that the in-vehicle discharge function has been turned on.

[0119] In step 215 , the vehicle control unit receives the first start instruction, and sends a second discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge conditions.

[0120] In one possible implementation, after receiving the first start-up instruction, the onboard control unit further determines whether the new energy vehicle meets the discharge conditions. The process by which the vehicle control unit receives the first start-up instruction and determines whether the new energy vehicle meets the discharge conditions is similar to the process by which the vehicle control unit receives the load connection signal and the charging request and determines whether the new energy vehicle meets the discharge conditions, and is not further described in detail in this embodiment of the present application.

[0121] When determining that the new energy vehicle meets the discharge conditions, the vehicle control unit sends a second discharge instruction to the on-board charger.

[0122] In a possible implementation, after the vehicle control unit determines that the new energy vehicle meets the discharge conditions, it may also determine the second discharge power, and then send the second discharge instruction and the second discharge power to the on-board charger.

[0123] The process of determining the second discharge power is similar to the process of determining the first discharge power, and will not be further described in detail in the embodiment of the present application.

[0124] In step 216 , the on-board charger receives the second discharge instruction and outputs the direct current output from the power battery of the new energy vehicle to the load device.

[0125] In a possible implementation, after receiving the second discharge instruction, the on-board charger outputs the direct current output by the power battery of the new energy vehicle to the load device, so as to charge the load device through the power battery.

[0126] In another possible implementation, after receiving the second discharge instruction and the second discharge power, the on-board charger outputs the direct current output by the power battery of the new energy vehicle to the load device according to the second discharge power.

[0127] The above method realizes the automated discharge control process after the load device is connected to the on-board charger through the coordinated cooperation between the on-board charger, on-board infotainment host and vehicle control unit of the new energy vehicle. It not only ensures that the discharge function is accurately turned on when the load device is connected, but also confirms the discharge conditions through the vehicle control unit to ensure the safety of the discharge process. At the same time, with the help of signal interaction between various components, the reliability and response efficiency of the discharge function are improved, making the in-vehicle discharge operation of new energy vehicles more intelligent, safe and convenient.

[0128] Figure 3 FIG. 1 is a schematic diagram of a control system for in-vehicle discharge according to an embodiment of the present application. Figure 3 As shown, the system includes an on-board charger 301 of a new energy vehicle, an on-board infotainment host 302 and a vehicle control unit 303.

[0129] The on-board charger 301 is configured to, upon detecting that a load device is plugged in, send a load connection signal to the on-board infotainment host 302 and a load connection signal and a charging request to the vehicle control unit 303. The load connection signal indicates that the load device has been plugged in to the on-board charger 301, and the charging request indicates a request to charge the load device.

[0130] The in-vehicle infotainment host 302 is used to receive a load connection signal and control the activation of the in-vehicle discharge function of the new energy vehicle;

[0131] The vehicle control unit 303 is configured to receive a load connection signal and a charging request, and send a first discharge instruction to the onboard charger 301 when determining that the new energy vehicle meets the discharge conditions;

[0132] The on-board charger 301 is further configured to receive a first discharge instruction and output the direct current outputted by the power battery of the new energy vehicle to a load device.

[0133] In one possible implementation, the vehicle control unit 303 is also used to obtain the current gear position of the new energy vehicle and the current remaining power ratio of the power battery; when the current gear position meets the gear requirements and the current remaining power ratio is greater than the ratio threshold, it is determined that the new energy vehicle meets the discharge conditions; when at least one of the current gear position meets the gear requirements and the current remaining power ratio is greater than the ratio threshold is not met, it is determined that the new energy vehicle does not meet the discharge conditions.

[0134] In one possible implementation, the current gear meets the gear requirements, including any of the following: the current gear is the accessory power gear; the current gear is the full vehicle power gear, and the high-voltage system of the new energy vehicle is ready; the current gear is the full vehicle power gear, and the power transmission system of the new energy vehicle is ready.

[0135] In a possible implementation, the vehicle control unit 303 is further configured to determine a first discharge power and send the first discharge power to the onboard charger 301;

[0136] The on-board charger 301 is further configured to receive the first discharge power and output the direct current output by the power battery of the new energy vehicle to a load device according to the first discharge power.

[0137] In one possible implementation, the vehicle control unit 303 is used to obtain the maximum allowable discharge power of the power battery; obtain the maximum output power of the on-board charger 301; obtain the current required power of the load device; determine the difference power between the total available power of the power battery and the reserved power of the new energy vehicle; and use the minimum value of the maximum allowable discharge power of the power battery, the maximum output power of the on-board charger 301, the current required power of the load device, and the difference power as the first discharge power.

[0138] In one possible implementation, the in-vehicle infotainment host 302 is further configured to display a control corresponding to an in-vehicle discharge function, where the control corresponding to the in-vehicle discharge function is in an on state; in response to a triggering operation on the control corresponding to the in-vehicle discharge function, a first off instruction is sent to the vehicle control unit 303, where the first off instruction is configured to indicate that the in-vehicle discharge function has been turned off;

[0139] The vehicle control unit 303 is further configured to receive the first shutdown instruction and send a stop discharge instruction to the on-board charger 301;

[0140] The on-board charger 301 is further configured to receive a stop-discharge instruction and stop outputting the DC power outputted by the power battery of the new energy vehicle to the load device.

[0141] In one possible implementation, the in-vehicle infotainment host 302 is further configured to display a control corresponding to an in-vehicle discharge function, where the control corresponding to the in-vehicle discharge function is in an off state; and in response to a triggering operation on the control corresponding to the in-vehicle discharge function, send a first on instruction to the vehicle control unit 303, where the first on instruction is configured to indicate that the in-vehicle discharge function has been turned on.

[0142] The vehicle control unit 303 is further configured to receive the first start instruction and, if it is determined that the new energy vehicle meets the discharge conditions, send a second discharge instruction to the on-board charger 301;

[0143] The on-board charger 301 is further configured to receive a second discharge instruction and output the DC power output by the power battery of the new energy vehicle to a load device.

[0144] In one possible implementation, the system further includes a vehicle meter 304 of a new energy vehicle;

[0145] The onboard charger 301 is also used to send a load connection signal to the vehicle meter 304;

[0146] The vehicle meter 304 is used to receive the load connection signal and display a first icon, where the first icon is used to indicate that the on-board charger 301 is connected to the load device.

[0147] In a possible implementation, the on-board charger 301 is further configured to send discharge information to the on-board infotainment host 302 and the vehicle instrument 304 , where the discharge information is used to indicate that the power battery is discharging to the load device.

[0148] The in-vehicle infotainment host 302 is further configured to receive discharge information and display a second icon, where the second icon is configured to indicate that the power battery is discharging;

[0149] The vehicle instrument 304 is further configured to receive discharge information and display the discharge gun indicator light in the vehicle instrument 304 in a target color. The discharge gun indicator light displaying the target color is used to indicate that the power battery is discharging.

[0150] The above system realizes the automated discharge control process after the load device is connected to the on-board charger through the coordinated cooperation between the on-board charger, on-board infotainment host and vehicle control unit of the new energy vehicle. It not only ensures that the discharge function is accurately turned on when the load device is connected, but also confirms the discharge conditions through the vehicle control unit to ensure the safety of the discharge process. At the same time, with the help of signal interaction between various components, the reliability and response efficiency of the discharge function are improved, making the discharge operation in the new energy vehicle more intelligent, safe and convenient.

[0151] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions.

[0152] It should be understood that the term "plurality" used herein refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0153] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for controlling discharge in a vehicle, characterized in that: The method comprises: When the on-board charger of the new energy vehicle detects that a load device is plugged in, it sends a load connection signal to the on-board infotainment host of the new energy vehicle and sends the load connection signal and a charging request to the vehicle control unit of the new energy vehicle. The load connection signal is used to indicate that the load device has been plugged in to the on-board charger, and the charging request is used to indicate a request to charge the load device. The in-vehicle infotainment host receives the load connection signal and controls the in-vehicle discharge function of the new energy vehicle to be turned on; The vehicle control unit receives the load connection signal and the charging request, and sends a first discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge condition; The on-board charger receives the first discharge instruction and outputs the direct current output by the power battery of the new energy vehicle to the load device.

2. The method according to claim 1, characterized in that Before sending the first discharge instruction to the on-board charger, the method further includes: The vehicle control unit obtains the current gear position of the new energy vehicle and the current remaining power ratio of the power battery; The vehicle control unit determines that the new energy vehicle meets the discharge condition when the current gear meets the gear requirement and the current remaining power ratio is greater than the ratio threshold; The vehicle control unit determines that the new energy vehicle does not meet the discharge condition when at least one of the current gear meets the gear requirement and the current remaining power ratio is greater than the ratio threshold is not met.

3. The method according to claim 2, characterized in that The current gear meets the gear requirements, including any of the following: The current gear is the accessory power gear; The current gear is the full vehicle power gear, and the high-voltage system of the new energy vehicle is ready; The current gear is the full vehicle power gear, and the power transmission system of the new energy vehicle is ready.

4. The method according to claim 1, wherein The method further comprises: The vehicle control unit determines a first discharge power and sends the first discharge power to the on-board charger; The on-board charger receives the first discharge power and outputs the direct current output by the power battery of the new energy vehicle to the load device according to the first discharge power.

5. The method according to claim 4, characterized in that The determining of the first discharge power includes: Obtaining the maximum allowable discharge power of the power battery; Obtaining the maximum output power of the on-board charger; Obtaining the current required power of the load device; Determining the difference between the total available power of the power battery and the reserved power of the new energy vehicle; The minimum value among the maximum allowable discharge power of the power battery, the maximum output power of the on-board charger, the current required power of the load device and the difference power is used as the first discharge power.

6. The method according to any one of claims 1 to 5, characterized in that: After the on-board charger receives the first discharge instruction and outputs the direct current output by the power battery of the new energy vehicle to the load device, the method further includes: The in-vehicle infotainment host displays a control corresponding to the in-vehicle discharge function, and the control corresponding to the in-vehicle discharge function is in an on state; In response to a triggering operation on a control corresponding to the in-vehicle discharge function, the in-vehicle infotainment host sends a first shutdown instruction to the vehicle control unit, where the first shutdown instruction is used to indicate that the in-vehicle discharge function has been turned off; The vehicle control unit receives the first shutdown instruction and sends a stop discharge instruction to the on-board charger; The on-board charger receives the stop-discharging instruction and stops outputting the direct current outputted from the power battery of the new energy vehicle to the load device.

7. The method according to claim 6, characterized in that After the on-board charger receives the stop-discharge instruction and stops outputting the direct current outputted by the power battery of the new energy vehicle to the load device, the method further includes: The in-vehicle infotainment host displays a control corresponding to the in-vehicle discharge function, and the control corresponding to the in-vehicle discharge function is in an off state; In response to a triggering operation of a control corresponding to the in-vehicle discharge function, the in-vehicle infotainment host sends a first activation instruction to the vehicle control unit, where the first activation instruction is used to indicate that the in-vehicle discharge function has been activated; The vehicle control unit receives the first start instruction and sends a second discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge conditions; The on-board charger receives the second discharge instruction and outputs the direct current output by the power battery of the new energy vehicle to the load device.

8. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: The on-board charger sends the load connection signal to the vehicle instrument of the new energy vehicle; The vehicle meter receives the load connection signal and displays a first icon, where the first icon is used to indicate that the on-board charger is connected to the load device.

9. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: The on-board charger sends discharge information to the on-board infotainment host and the vehicle instrument, wherein the discharge information is used to indicate that the power battery is discharging to the load device; The in-vehicle infotainment host receives the discharge information and displays a second icon, where the second icon is used to indicate that the power battery is discharging; The vehicle meter receives the discharge information and displays a discharge gun indicator light in the vehicle meter as a target color. The discharge gun indicator light displays the target color to indicate that the power battery is discharging.

10. A control system for in-vehicle discharge, characterized in that: The system includes an on-board charger, an on-board infotainment host and a vehicle control unit for a new energy vehicle; The on-board charger is configured to, upon detecting that a load device is plugged in, send a load connection signal to the on-board infotainment host, and send the load connection signal and a charging request to the vehicle control unit, wherein the load connection signal is used to indicate that the load device has been plugged in to the on-board charger, and the charging request is used to indicate a request to charge the load device; The in-vehicle infotainment host is configured to receive the load connection signal and control the in-vehicle discharge function of the new energy vehicle to be turned on; The vehicle control unit is configured to receive the load connection signal and the charging request, and send a first discharge instruction to the on-board charger when determining that the new energy vehicle meets the discharge conditions; The on-board charger is further configured to receive the first discharge instruction and output the direct current outputted by the power battery of the new energy vehicle to the load device.

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