Intelligent charging method for new energy vehicle and vehicle

Abstract

The invention provides an intelligent charging method for a new energy automobile and the automobile, and belongs to the field of whole automobile system control of the new energy automobile. When a storage battery sensor judges that the electric quantity of a storage battery is lower than a first threshold value, namely the storage battery is lack of electricity, a vehicle body domain controller and a whole automobile network are awakened, and when the automobile meets the intelligent charging condition, the intelligent charging is started; when the storage battery is charged, the high-voltage relay of the power battery is closed, and the DC-DC converter is used for converting high voltage output by the power battery into 12V low voltage and charging the storage battery, so that the power battery is used for charging the storage battery in time when the storage battery is lack of electricity, and normal unlocking and starting of the vehicle are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of whole vehicle system control of new energy vehicles, and in particular to an intelligent charging method and vehicle for new energy vehicles. Background Art

[0002] With the gradual improvement of supporting facilities such as charging piles and the increasing manifestation of the economic advantages of new energy vehicles, new energy vehicles have already had a high penetration rate.

[0003] The power modes of new energy vehicles mainly include plug-in hybrid, extended-range and pure electric. New energy vehicles with these three power modes are all equipped with power batteries for driving the vehicle, as well as batteries for starting the vehicle and providing electricity for electrical appliances in the vehicle.

[0004] The battery's electrical energy mainly comes from the vehicle's inertia when it is running, and the inertia is used to reverse charge the battery. However, if the vehicle is not driven for a long time, the battery's power may slowly drain. When the battery's power is below a certain level, the vehicle may not be unlocked or started normally. Summary of the invention

[0005] In view of this, the present application provides a new energy vehicle intelligent charging method, which can timely charge the battery to ensure normal unlocking and starting of the vehicle, and the method includes:

[0006] On the one hand, the present application provides a new energy vehicle intelligent power replenishment method, the method comprising:

[0007] The battery sensor determines whether the battery power is lower than a first threshold.

[0008] When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor wakes up the body domain controller, and the body domain controller wakes up the entire vehicle network.

[0009] The body domain controller determines whether the current vehicle meets the conditions for intelligent charging.

[0010] When the body domain controller determines that the current vehicle meets the intelligent charging conditions, the body domain controller sends a charging request to the vehicle controller.

[0011] After receiving the request for charging, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0012] After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0013] Optionally, the method further comprises:

[0014] Determine whether the current vehicle meets the shutdown conditions.

[0015] When it is determined that the current vehicle meets the shutdown condition, the battery sensor determines whether the battery power is lower than a first threshold.

[0016] When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor sends a determination request to the vehicle body domain controller.

[0017] When the body domain controller receives the judgment request, the body domain controller determines whether the current vehicle meets the intelligent charging conditions.

[0018] When the body domain controller determines that the current vehicle meets the intelligent charging conditions, the body domain controller sends a charging request to the vehicle controller.

[0019] After receiving the request for charging, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0020] After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0021] Optionally, after the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0022] The battery sensor determines whether the battery power is greater than a second threshold.

[0023] When the battery sensor determines that the battery power is greater than the second threshold, the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0024] Optionally, after the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0025] The battery sensor determines whether the battery charging time is greater than a time threshold.

[0026] When the battery sensor determines that the battery charging time is greater than the time threshold, the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0027] Optionally, when all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent charging conditions: the power of the power battery is greater than a third threshold, the front hood is closed, and the battery sensor has no faults.

[0028] On the other hand, the present application also provides a vehicle, the vehicle being configured as:

[0029] A battery sensor is used to determine whether the battery power level is lower than a first threshold.

[0030] When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor wakes up the vehicle body domain controller, and the vehicle body domain controller is used to wake up the vehicle network.

[0031] The body domain controller determines whether the current vehicle meets the conditions for intelligent charging.

[0032] When the body domain controller determines that the current vehicle meets the intelligent charging conditions, the body domain controller sends a charging request to the vehicle controller.

[0033] After receiving the request for charging, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0034] After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0035] Optionally, the vehicle is further configured to:

[0036] Determine whether the current vehicle meets the shutdown conditions.

[0037] When it is determined that the current vehicle meets the shutdown condition, the battery sensor determines whether the battery power is lower than a first threshold.

[0038] When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor sends a determination request to the vehicle body domain controller.

[0039] When the body domain controller receives the judgment request, the body domain controller determines whether the current vehicle meets the intelligent charging conditions.

[0040] When the body domain controller determines that the current vehicle meets the intelligent charging conditions, the body domain controller sends a charging request to the vehicle controller.

[0041] After receiving the request for charging, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0042] After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0043] Optionally, the vehicle is further configured to:

[0044] After the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the battery sensor determines whether the battery power is greater than the second threshold.

[0045] When the battery sensor determines that the battery power is greater than the second threshold, the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0046] Optionally, the vehicle is further configured to:

[0047] After the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the battery sensor determines whether the battery charging time is greater than the time threshold.

[0048] When the battery sensor determines that the battery charging time is greater than the time threshold, the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0049] Optionally, when all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent charging conditions: the power of the power battery is greater than a third threshold, the front hood is closed, and the battery sensor has no faults.

[0050] By adopting the intelligent charging method and vehicle for new energy vehicles provided by the present application, when the battery sensor determines that the battery power is lower than the first threshold, that is, when the battery is low on power, the body domain controller and the whole vehicle network are awakened, and when the vehicle meets the intelligent charging conditions and is suitable for charging the battery, the high-voltage relay of the power battery is closed, and the high-voltage power output by the power battery is converted into 12V low-voltage power by a DC-DC converter and the battery is charged, so that the power battery can be used to charge the battery in time when the battery is low on power to ensure normal unlocking and starting of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0052] Figure 1 A flow chart of a new energy vehicle intelligent charging method provided in an embodiment of the present application;

[0053] Figure 2Another flow chart of the new energy vehicle intelligent charging method provided in the embodiment of the present application;

[0054] Figure 3 Another flow chart of the new energy vehicle intelligent charging method provided in the embodiment of the present application;

[0055] Figure 4 A timing diagram of the intelligent charging method for new energy vehicles provided in an embodiment of the present application;

[0056] Figure 5 An architectural diagram of a vehicle provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] The present application embodiment provides a new energy vehicle intelligent power replenishment method, such as Figure 1 As shown, the method includes steps S101, S102, S103, S104, S105 and S106, wherein:

[0059] In step S101 , the battery sensor determines whether the battery power level is lower than a first threshold.

[0060] When the battery sensor determines that the battery power is lower than the first threshold, step S102 is executed, the battery sensor wakes up the vehicle body domain controller, and the vehicle body domain controller wakes up the vehicle network.

[0061] In step S103, the body domain controller determines whether the current vehicle meets the intelligent charging conditions.

[0062] When the body domain controller determines that the current vehicle meets the intelligent charging conditions, step S104 is executed, and the body domain controller sends a charging request to the vehicle controller.

[0063] In step S105, after receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0064] In step S106, after the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0065] In some optional embodiments, the method further comprises:

[0066] Determine whether the current vehicle meets the shutdown conditions.

[0067] When it is determined that the current vehicle meets the shutdown condition, the battery sensor determines whether the battery power is lower than a first threshold.

[0068] When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor sends a determination request to the vehicle body domain controller.

[0069] When the body domain controller receives the judgment request, the body domain controller determines whether the current vehicle meets the intelligent charging conditions.

[0070] When the body domain controller determines that the current vehicle meets the intelligent charging conditions, the body domain controller sends a charging request to the vehicle controller.

[0071] After receiving the request for charging, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0072] After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0073] In some optional embodiments, after the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0074] The battery sensor determines whether the battery power is greater than a second threshold.

[0075] When the battery sensor determines that the battery power is greater than the second threshold, the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0076] In some optional embodiments, after the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0077] The battery sensor determines whether the battery charging time is greater than a time threshold.

[0078] When the battery sensor determines that the battery charging time is greater than the time threshold, the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0079] In some optional embodiments, when all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent charging conditions: the power of the power battery is greater than a third threshold, the front hood is closed, and the battery sensor has no faults.

[0080] By adopting the intelligent charging method for new energy vehicles provided by the present application, when the battery sensor determines that the battery power is lower than the first threshold, that is, when the battery is low on power, the body domain controller and the whole vehicle network are awakened, and when the vehicle meets the intelligent charging conditions and is suitable for charging the battery, the high-voltage relay of the power battery is closed, and the high-voltage power output by the power battery is converted into 12V low-voltage power by a DC-DC converter and the battery is charged, so that the power battery can be used to charge the battery in time when the battery is low on power to ensure normal unlocking and starting of the vehicle.

[0081] The present application also provides a method for intelligently charging a new energy vehicle. Figure 2 As shown, the method includes steps S201, S202, S203, S204, S205, S206, S207 and S208, wherein:

[0082] In step S201 , the battery sensor determines whether the battery power level is lower than a first threshold.

[0083] In some optional embodiments, the first threshold value may be calibrated according to actual conditions. Specifically, the first threshold value may be 60% of the total power of the battery.

[0084] It is understandable that for batteries of the same health, batteries in low temperature environments are more likely to lose power and enter a low-power state at a faster rate. Therefore, when the vehicle is in a low-temperature environment, the battery needs to be intelligently recharged as soon as possible.

[0085] Therefore, before executing step S201, the outside temperature of the vehicle may be obtained, and the first threshold may be determined according to the corresponding relationship between the outside temperature of the vehicle and the first threshold.

[0086] Specifically, a correspondence table between the outside temperature and the first threshold value may be stored in advance. The outside temperature and the first threshold value are negatively correlated. The lower the outside temperature, the higher the corresponding first threshold value.

[0087] For example, when the outside temperature is 10 degrees Celsius, the corresponding first threshold is 60%, and when the outside temperature is -10 degrees Celsius, the corresponding first threshold can be 70%, so as to avoid the low temperature causing the battery to lose power too quickly, which further leads to the failure to unlock and start the vehicle normally next time.

[0088] When the judgment result of step S201 is "yes", that is, when the battery sensor determines that the battery power is lower than the first threshold, step S202 is executed:

[0089] In step S202, the battery sensor wakes up the body domain controller, and the body domain controller wakes up the entire vehicle network.

[0090] In some optional embodiments, waking up the entire vehicle network refers to waking up the entire vehicle CAN bus, so that various controllers of the vehicle can transmit information to each other and perform corresponding control.

[0091] It can be understood that this embodiment corresponds to the situation where the vehicle is parked for a long time. When the vehicle is parked for a long time, the body domain controller and the whole vehicle network are in a dormant state. At this time, the body domain controller and the whole vehicle network need to be awakened in order to execute the subsequent intelligent power replenishment steps.

[0092] In step S203, the body domain controller determines whether the current vehicle meets the intelligent charging conditions.

[0093] In some optional embodiments, when all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent charging conditions: the power of the power battery is greater than a third threshold, the front hood is closed, and the battery sensor has no faults.

[0094] It is understandable that the intelligent charging condition stipulates that the power battery power is greater than the third threshold value in order to avoid using the power battery to charge the storage battery when the power battery power is too low, thereby further consuming the power battery power and making the vehicle unable to drive normally even after normal unlocking and starting.

[0095] The intelligent charging conditions stipulate that the front hatch must be closed because if the front hatch is open and someone is debugging the equipment in the front cabin, connecting the high voltage and charging the battery at this time may easily cause the risk of high-voltage electric shock. Therefore, it is stipulated that the front hatch must be in the closed state to ensure the safety of personnel.

[0096] The intelligent charging condition stipulates that the battery sensor is not faulty in order to avoid the problem of inaccurate battery charge judgment due to a battery sensor failure. If the battery charge judgment is inaccurate, for example, the charge is higher than the first threshold, intelligent charging at this time may cause the battery to be overcharged.

[0097] In some optional embodiments, the intelligent charging condition may also include that the vehicle power is in the "OFF" state. If the vehicle power is in the "ON" state, it means that the vehicle may be driving at this time, or the power battery is charging the storage battery, and there is no need to further perform the subsequent intelligent charging steps.

[0098] If any of the intelligent charging conditions is not met, the body domain controller sends corresponding instruction information to the Internet of Vehicles system, and the Internet of Vehicles system sends the instruction information to the mobile phone APP. The instruction information is used to feedback the specific reason why the charging was not performed.

[0099] When the judgment result of step S203 is "yes", that is, when the body domain controller determines that the current vehicle meets the intelligent charging conditions, step S204 is executed:

[0100] In step S204, the body domain controller sends a power replenishment request to the vehicle controller.

[0101] In some optional embodiments, since some car owners may have their own garages, a car maintenance device may be installed in the garage. When the car owner needs to use the vehicle, the car maintenance device can be used in advance to manually charge the vehicle battery. Therefore, even if the battery is low, there is no need to use the power battery for intelligent charging. Therefore, when the body domain controller determines that the current vehicle meets the intelligent charging conditions, it can also send a charging instruction to the vehicle network system. The vehicle network system sends the charging instruction to the mobile phone APP. When the user confirms on the mobile phone APP, the mobile phone sends a confirmation instruction to the vehicle network system. The vehicle network system generates a charging request based on the charging instruction and the confirmation instruction, and sends it to the body domain controller. The body domain controller further executes step S305, sends a charging request to the vehicle controller, and then executes the subsequent intelligent charging process.

[0102] In step S205, after receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0103] In step S206, after the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0104] At this time, the body domain controller will feed back the battery charging status to the car networking system, and the car networking system will feed back the battery charging status to the mobile phone APP so that the user can know the current charging information.

[0105] In some optional embodiments, to avoid overcharging of the battery, after the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0106] In step S207, the battery sensor determines whether the battery power level is greater than a second threshold, or whether the battery charging time is greater than a time threshold.

[0107] When the judgment result of step S207 is "yes", that is, when the battery sensor determines that the battery power is greater than the second threshold or the battery charging time is greater than the time threshold, step S208 is executed:

[0108] In step S208, the battery management system disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0109] It is understandable that if the battery power is greater than the second threshold, it means that the battery has sufficient power and there is no risk of power shortage. The second threshold can be calibrated according to actual conditions and can be 95% of the total battery power.

[0110] Similarly, if the battery charging time is greater than the time threshold, it also means that the battery has sufficient power and there is no risk of power shortage. The time threshold can be calibrated according to actual conditions, and the time threshold can be 40 minutes.

[0111] After the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity, the body domain controller BDM sends the charging completion information to the vehicle networking system, and feeds back the battery charging completion status to the mobile phone APP so that the user can receive the charging completion information.

[0112] As the charging progresses, the power battery's charge will gradually decrease. When the power battery's charge drops below 15%, the body domain controller sends a request to control the vehicle to stop charging. The body domain controller sends a reminder to suspend charging to the vehicle networking system. The vehicle networking system sends the reminder to suspend charging to the mobile phone APP. At this time, the user's mobile phone APP will receive a message prompting that the charging has been suspended due to the low power battery charge.

[0113] By adopting the intelligent charging method for new energy vehicles provided by the present application, when the battery sensor determines that the battery power is lower than the first threshold, that is, when the battery is low on power, the body domain controller and the whole vehicle network are awakened, and when the vehicle meets the intelligent charging conditions and is suitable for charging the battery, the high-voltage relay of the power battery is closed, and the high-voltage power output by the power battery is converted into 12V low-voltage power by a DC-DC converter and the battery is charged, so that the power battery can be used to charge the battery in time when the battery is low on power to ensure normal unlocking and starting of the vehicle.

[0114] The present application also provides a method for intelligently charging a new energy vehicle. Figure 2 As shown, the method includes steps S301, S302, S303, S304, S305, S306, S307, S308 and S309, wherein:

[0115] In step S301, it is determined whether the current vehicle meets the shutdown condition.

[0116] When the judgment result of step S301 is "yes", that is, when it is judged that the current vehicle meets the shutdown condition, step S302 is executed: the battery sensor determines whether the battery power is lower than the first threshold.

[0117] In some optional embodiments, the first threshold value may be calibrated according to actual conditions. Specifically, the first threshold value may be 60% of the total power of the battery.

[0118] It is understandable that for batteries of the same health, batteries in low temperature environments are more likely to lose power and enter a low-power state at a faster rate. Therefore, when the vehicle is in a low-temperature environment, the battery needs to be intelligently recharged as soon as possible.

[0119] Therefore, when it is determined that the current vehicle meets the shutdown condition, the outside temperature of the vehicle may also be obtained, and the first threshold may be determined based on the corresponding relationship between the outside temperature of the vehicle and the first threshold.

[0120] Specifically, a correspondence table between the outside temperature and the first threshold value may be stored in advance. The outside temperature and the first threshold value are negatively correlated. The lower the outside temperature, the higher the corresponding first threshold value.

[0121] For example, when the outside temperature is 10 degrees Celsius, the corresponding first threshold is 60%, and when the outside temperature is -10 degrees Celsius, the corresponding first threshold can be 70%, so as to avoid the low temperature causing the battery to lose power too quickly, which further leads to the failure to unlock and start the vehicle normally next time.

[0122] If the judgment result of step S302 is "yes", that is, when the battery sensor judges that the battery power is lower than the first threshold, step S303 is executed: the battery sensor sends a judgment request to the vehicle body domain controller.

[0123] It can be understood that this embodiment corresponds to the situation where the vehicle has just finished driving and is turned off. At this time, the body domain controller and the whole vehicle network are in working state. At this time, there is no need to wake up the body domain controller and the whole vehicle network. A judgment request can be directly sent to the body domain controller to execute the subsequent intelligent power replenishment steps.

[0124] In step S304, the body domain controller determines whether the current vehicle meets the intelligent charging conditions.

[0125] In some optional embodiments, when all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent charging conditions: the power of the power battery is greater than a third threshold, the front hood is closed, and the battery sensor has no faults.

[0126] It is understandable that the intelligent charging condition stipulates that the power battery power is greater than the third threshold value in order to avoid using the power battery to charge the storage battery when the power battery power is too low, thereby further consuming the power battery power and making the vehicle unable to drive normally even after normal unlocking and starting.

[0127] The intelligent charging conditions stipulate that the front hatch must be closed because if the front hatch is open and someone is debugging the equipment in the front cabin, connecting the high voltage and charging the battery at this time may easily cause the risk of high-voltage electric shock. Therefore, it is stipulated that the front hatch must be in the closed state to ensure the safety of personnel.

[0128] The intelligent charging condition stipulates that the battery sensor is not faulty in order to avoid the problem of inaccurate battery charge judgment due to a battery sensor failure. If the battery charge judgment is inaccurate, for example, the charge is higher than the first threshold, intelligent charging at this time may cause the battery to be overcharged.

[0129] In some optional embodiments, the intelligent charging condition may also include that the vehicle power is in the "OFF" state. If the vehicle power is in the "ON" state, it means that the vehicle may be driving at this time, or the power battery is charging the storage battery, and there is no need to further perform the subsequent intelligent charging steps.

[0130] If any of the intelligent charging conditions is not met, the body domain controller sends corresponding instruction information to the Internet of Vehicles system, and the Internet of Vehicles system sends the instruction information to the mobile phone APP. The instruction information is used to feedback the specific reason why the charging was not performed.

[0131] When the judgment result of step S304 is "yes", that is, when the body domain controller determines that the current vehicle meets the intelligent charging conditions, step S305 is executed: the body domain controller sends a charging request to the vehicle controller.

[0132] In step S306, after receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery.

[0133] In step S307, after the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

[0134] At this time, the body domain controller will feed back the battery charging status to the car networking system, and the car networking system will feed back the battery charging status to the mobile phone APP so that the user can know the current charging information.

[0135] In some optional embodiments, since some car owners may have their own garages, a car maintenance device may be installed in the garage. When the car owner needs to use the vehicle, the car maintenance device can be used in advance to manually charge the vehicle battery. Therefore, even if the battery is low, there is no need to use the power battery for intelligent charging. Therefore, when the body domain controller determines that the current vehicle meets the intelligent charging conditions, it can also send a charging instruction to the vehicle network system. The vehicle network system sends the charging instruction to the mobile phone APP. When the user confirms on the mobile phone APP, the mobile phone sends a confirmation instruction to the vehicle network system. The vehicle network system generates a charging request based on the charging instruction and the confirmation instruction, and sends it to the body domain controller. The body domain controller further executes step S305, sends a charging request to the vehicle controller, and then executes the subsequent intelligent charging process.

[0136] On the contrary, if the user refuses on the mobile phone APP, the mobile phone sends a rejection instruction to the Internet of Vehicles system, and the Internet of Vehicles system will not generate further power replenishment requests after receiving the rejection instruction.

[0137] In some optional embodiments, to avoid overcharging of the battery, after the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0138] In step S308, the battery sensor determines whether the battery power level is greater than a second threshold, or whether the battery charging time is greater than a time threshold.

[0139] When the judgment result of step S308 is "yes", that is, when the battery sensor determines that the battery power is greater than the second threshold or the battery charging time is greater than the time threshold, step S309 is executed:

[0140] In step S309, the battery management system disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

[0141] It is understandable that if the battery power is greater than the second threshold, it means that the battery has sufficient power and there is no risk of power shortage. The second threshold can be calibrated according to actual conditions and can be 95% of the total battery power.

[0142] Similarly, if the battery charging time is greater than the time threshold, it also means that the battery has sufficient power and there is no risk of power shortage. The time threshold can be calibrated according to actual conditions, and the time threshold can be 40 minutes.

[0143] After the battery management system disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity, the body domain controller BDM sends the charging completion information to the vehicle networking system, and feeds back the battery charging completion status to the mobile phone APP so that the user can receive the charging completion information.

[0144] As the charging progresses, the power battery's charge will gradually decrease. When the power battery's charge drops below 15%, the body domain controller sends a request to control the vehicle to stop charging. The body domain controller sends a reminder to suspend charging to the vehicle networking system. The vehicle networking system sends the reminder to suspend charging to the mobile phone APP. At this time, the user's mobile phone APP will receive a message prompting that the charging has been suspended due to the low power battery charge.

[0145] By adopting the intelligent charging method for new energy vehicles provided by the present application, when the battery sensor determines that the battery power is lower than the first threshold, that is, when the battery is low on power, the body domain controller and the whole vehicle network are awakened, and when the vehicle meets the intelligent charging conditions and is suitable for charging the battery, the high-voltage relay of the power battery is closed, and the high-voltage power output by the power battery is converted into 12V low-voltage power by a DC-DC converter and the battery is charged, so that the power battery can be used to charge the battery in time when the battery is low on power to ensure normal unlocking and starting of the vehicle.

[0146] The present application also provides a new energy vehicle intelligent charging method corresponding to Figure 2 The process of the intelligent charging method for new energy vehicles shown in FIG. Figure 4 As shown, Figure 4 A timing diagram of the intelligent charging method for new energy vehicles provided in an embodiment of the present application, wherein:

[0147] First, the battery sensor IBS determines whether the battery power level is lower than a first threshold.

[0148] In some optional embodiments, the first threshold value may be calibrated according to actual conditions. Specifically, the first threshold value may be 60% of the total power of the battery.

[0149] When the battery sensor IBS determines that the battery power is lower than the first threshold (corresponding to the timing diagram 401), 402 is executed, the battery sensor IBS wakes up the body domain controller BDM, and then 403 is executed, that is, the body domain controller BDM wakes up the vehicle network, mainly including waking up the vehicle controller VCU, the battery management system BMS and the DC-DC converter.

[0150] In some optional embodiments, waking up the entire vehicle network refers to waking up the entire vehicle CAN bus, so that various controllers of the vehicle can transmit information to each other and perform corresponding control.

[0151] It can be understood that this embodiment corresponds to the situation where the vehicle is parked for a long time. When the vehicle is parked for a long time, the body domain controller BDM and the whole vehicle network are in a dormant state. At this time, the body domain controller BDM and the whole vehicle network need to be awakened in order to execute the subsequent intelligent power replenishment steps.

[0152] Furthermore, in 404 , the battery management system BMS sends the power of the power battery to the body domain controller BDM.

[0153] Furthermore, the body domain controller BDM determines whether the front hood is closed, whether the power of the power battery is greater than a third threshold, and whether the vehicle power state is OFF, that is, determines whether the current vehicle meets the intelligent charging conditions.

[0154] In some optional embodiments, when all of the following conditions are met at the same time, the body domain controller BDM determines that the current vehicle meets the intelligent charging conditions: the power of the power battery is greater than the third threshold, the vehicle power state is OFF, and the front hood is closed (corresponding to 405).

[0155] It is understandable that the intelligent charging condition stipulates that the power battery power is greater than the third threshold value in order to avoid using the power battery to charge the storage battery when the power battery power is too low, thereby further consuming the power battery power and making the vehicle unable to drive normally even after normal unlocking and starting.

[0156] The intelligent charging conditions stipulate that the front hatch must be closed because if the front hatch is open and someone is debugging the equipment in the front cabin, connecting the high voltage and charging the battery at this time may easily cause the risk of high-voltage electric shock. Therefore, it is stipulated that the front hatch must be in the closed state to ensure the safety of personnel.

[0157] In some optional embodiments, the intelligent charging condition may also include that the vehicle power is in the "OFF" state. If the vehicle power is in the "ON" state, it means that the vehicle may be driving at this time, or the power battery is charging the storage battery, and there is no need to further perform the subsequent intelligent charging steps.

[0158] In some optional embodiments, the intelligent charging condition may further specify that the battery sensor IBS is not faulty, thereby avoiding the problem of inaccurate battery charge judgment due to a fault in the battery sensor IBS. If the battery charge judgment is inaccurate, for example, the charge is higher than the first threshold, intelligent charging at this time may cause the battery to be overcharged.

[0159] If any of the intelligent charging conditions is not met, the body domain controller BDM sends corresponding indication information to the Internet of Vehicles system, and the Internet of Vehicles system sends the indication information to the mobile phone APP. The indication information is used to feedback the specific reason why the charging was not performed.

[0160] Furthermore, in 406 , the body domain controller BDM sends a power replenishment request to the vehicle controller VCU.

[0161] In 407 , after receiving the charging request, the vehicle controller VCU requests the battery management system BMS to close the high-voltage relay of the power battery, that is, the vehicle controller VCU requests high voltage.

[0162] After the battery management system BMS closes the high-voltage relay, that is, the high-voltage power-on is completed (corresponding to 408), the power replenishment is ready (corresponding to 409), and the DC-DC converter converts the high-voltage power output by the power battery into 12V low-voltage power and charges the battery, that is, the power replenishment is in progress (corresponding to 410).

[0163] At this time, the body domain controller BDM will feed back the battery charging status information to the Internet of Vehicles system, and the Internet of Vehicles system TBOX will forward the charging status information to the mobile phone APP (corresponding to 411). The Internet of Vehicles system will feed back the battery charging status to the mobile phone APP so that the user can know the current charging information.

[0164] In some optional embodiments, to avoid overcharging of the battery, after the battery management system BMS closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes:

[0165] The battery sensor IBS determines whether the battery power level is greater than a second threshold.

[0166] When the battery sensor IBS determines that the battery power is greater than the second threshold value (corresponding to 412), it determines that there is no need to continue to replenish the power, and the vehicle domain controller BDM can send an indication to the vehicle controller VCU that no replenishment is needed (corresponding to 413), and the vehicle controller VCU requests the battery management system BMS to reduce the high voltage (corresponding to 414), the battery management system BMS disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity, completing the high-voltage power reduction (corresponding to 415).

[0167] It is understandable that if the battery power is greater than the second threshold, it means that the battery has sufficient power and there is no risk of power shortage. The second threshold can be calibrated according to actual conditions and can be 95% of the total battery power.

[0168] After the battery management system BMS disconnects the high-voltage relay and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity, the charging is considered to be completed (corresponding to 416).

[0169] Furthermore, the body domain controller BDM can also send the charging completion information to the Internet of Vehicles system, and feedback the battery charging completion status to the mobile phone APP so that the user can receive the charging completion information.

[0170] As the charging progresses, the power battery's charge will gradually decrease. When the power battery's charge drops below 15%, the body domain controller BDM sends a request to control the vehicle to stop charging. The body domain controller BDM sends a reminder to suspend charging to the vehicle networking system. The vehicle networking system sends the reminder to suspend charging to the mobile phone APP. At this time, the user's mobile phone APP will receive a message prompting that the charging has been suspended due to the low power battery charge.

[0171] By adopting the intelligent charging method for new energy vehicles provided by the present application, when the battery sensor IBS determines that the battery power is lower than the first threshold, that is, when the battery is low on power, the body domain controller BDM and the whole vehicle network are awakened, and when the vehicle meets the intelligent charging conditions and is suitable for charging the battery, the high-voltage relay of the power battery is closed, and the DC-DC converter is used to convert the high-voltage power output by the power battery into 12V low-voltage power and charge the battery, so that the power battery can be used to charge the battery in time when the battery is low on power to ensure normal unlocking and starting of the vehicle.

[0172] The present application also provides a vehicle, such as Figure 5 As shown, the vehicle includes a battery sensor 501, a body domain controller 502, a vehicle controller 503, a battery management system 504, a DC-DC converter 505, a battery 506, and a power battery 507 electrically connected by a CAN bus, wherein the vehicle is configured as follows:

[0173] The battery sensor 501 is used to determine whether the power level of the battery 506 is lower than a first threshold.

[0174] When the battery sensor 501 determines that the power level of the battery 506 is lower than the first threshold, the battery sensor 501 wakes up the vehicle body domain controller 502 , and uses the vehicle body domain controller 502 to wake up the vehicle network.

[0175] The body domain controller 502 determines whether the current vehicle meets the intelligent charging conditions.

[0176] When the body domain controller 502 determines that the current vehicle meets the intelligent charging conditions, the body domain controller 502 sends a charging request to the vehicle controller 503.

[0177] After receiving the charging request, the vehicle controller 503 requests the battery management system 504 to close the high-voltage relay of the power battery 507 .

[0178] After the battery management system 504 closes the high-voltage relay, the DC-DC converter 505 converts the high-voltage electricity output by the power battery 507 into 12V low-voltage electricity and charges the storage battery 506 .

[0179] Optionally, the vehicle is further configured to:

[0180] Determine whether the current vehicle meets the shutdown conditions.

[0181] When it is determined that the current vehicle meets the shutdown condition, the battery sensor 501 determines whether the power level of the battery 506 is lower than a first threshold.

[0182] When the battery sensor 501 determines that the power level of the battery 506 is lower than the first threshold, the battery sensor 501 sends a determination request to the vehicle body domain controller 502 .

[0183] When the body domain controller 502 receives the determination request, the body domain controller 502 determines whether the current vehicle meets the intelligent charging conditions.

[0184] When the body domain controller 502 determines that the current vehicle meets the intelligent charging conditions, the body domain controller 502 sends a charging request to the vehicle controller 503.

[0185] After receiving the charging request, the vehicle controller 503 requests the battery management system 504 to close the high-voltage relay of the power battery 507 .

[0186] After the battery management system 504 closes the high-voltage relay, the DC-DC converter 505 converts the high-voltage electricity output by the power battery 507 into 12V low-voltage electricity and charges the storage battery 506 .

[0187] Optionally, the vehicle is further configured to:

[0188] After the battery management system 504 closes the high-voltage relay and the DC-DC converter 505 converts the high-voltage electricity output by the power battery 507 into 12V low-voltage electricity and charges the battery 506, the battery sensor 501 determines whether the power of the battery 506 is greater than the second threshold.

[0189] When the battery sensor 501 determines that the power of the battery 506 is greater than the second threshold, the battery management system 504 disconnects the high-voltage relay, and the DC-DC converter 505 stops converting the high-voltage electricity output by the power battery 507 into 12V low-voltage electricity.

[0190] Optionally, the vehicle is further configured to:

[0191] After the battery management system 504 closes the high-voltage relay and the DC-DC converter 505 converts the high-voltage electricity output by the power battery 507 into 12V low-voltage electricity and charges the battery 506, the battery sensor 501 determines whether the charging time of the battery 506 is greater than the time threshold.

[0192] When the battery sensor 501 determines that the charging time of the battery 506 is greater than the time threshold, the battery management system 504 disconnects the high-voltage relay, and the DC-DC converter 505 stops converting the high-voltage electricity output by the power battery 507 into 12V low-voltage electricity.

[0193] Optionally, when all of the following conditions are met at the same time, the body domain controller 502 determines that the current vehicle meets the intelligent charging conditions: the power of the power battery 507 is greater than the third threshold, the front hood is closed, and the battery sensor 501 is not faulty.

[0194] In the vehicle provided by the present application, when the battery sensor 501 determines that the power level of the battery 506 is lower than the first threshold, that is, when the battery 506 is low on power, the body domain controller 502 and the vehicle network are awakened, and when the vehicle meets the intelligent charging conditions and is suitable for charging the battery 506, the high-voltage relay of the power battery 507 is closed, and the DC-DC converter 505 is used to convert the high-voltage power output by the power battery 507 into 12V low-voltage power and charge the battery 506, so that when the battery 506 is low on power, the power battery 507 can be used to charge the battery 506 in time to ensure that the vehicle is unlocked and started normally.

[0195] In the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0196] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0197] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

[0198] The above description is only for the purpose of facilitating those skilled in the art to understand the technical solution of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A new energy vehicle intelligent power replenishment method, characterized in that: The method comprises: The battery sensor determines whether the battery power is lower than a first threshold; When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor wakes up the vehicle body domain controller, and the vehicle body domain controller wakes up the vehicle network; The body domain controller determines whether the current vehicle meets the intelligent charging conditions; When the body domain controller determines that the current vehicle meets the intelligent power replenishment condition, the body domain controller sends a power replenishment request to the vehicle controller; After receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery; After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

2. The intelligent power replenishment method for new energy vehicles according to claim 1 is characterized in that: The method further comprises: Determine whether the current vehicle meets the shutdown condition; When it is determined that the current vehicle meets the shutdown condition, the battery sensor determines whether the battery power is lower than the first threshold; When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor sends a determination request to the vehicle body domain controller; When the body domain controller receives the judgment request, the body domain controller judges whether the current vehicle meets the intelligent charging condition; When the body domain controller determines that the current vehicle meets the intelligent power replenishment condition, the body domain controller sends a power replenishment request to the vehicle controller; After receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery; After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

3. The intelligent power replenishment method for new energy vehicles according to claim 1 or 2, characterized in that: After the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes: The battery sensor determines whether the battery power is greater than a second threshold; When the battery sensor determines that the battery power is greater than a second threshold, the battery management system disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

4. The intelligent power replenishment method for new energy vehicles according to claim 1 or 2, characterized in that: After the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the method further includes: The battery sensor determines whether the battery charging time is greater than a time threshold; When the battery sensor determines that the battery charging time is greater than the time threshold, the battery management system disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

5. The intelligent power replenishment method for new energy vehicles according to claim 1 or 2, characterized in that: When all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent power replenishment condition: the power of the power battery is greater than the third threshold, the front hood is closed, and the battery sensor has no faults.

6. A vehicle, characterized in that: The vehicle is configured as follows: Using a battery sensor to determine whether the battery power is lower than a first threshold; When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor wakes up the vehicle body domain controller, and uses the vehicle body domain controller to wake up the vehicle network; The body domain controller determines whether the current vehicle meets the intelligent charging conditions; When the body domain controller determines that the current vehicle meets the intelligent power replenishment condition, the body domain controller sends a power replenishment request to the vehicle controller; After receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery; After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

7. The vehicle according to claim 6, characterized in that The vehicle is also configured to: Determine whether the current vehicle meets the shutdown condition; When it is determined that the current vehicle meets the shutdown condition, the battery sensor determines whether the battery power is lower than the first threshold; When the battery sensor determines that the battery power is lower than the first threshold, the battery sensor sends a determination request to the vehicle body domain controller; When the body domain controller receives the judgment request, the body domain controller judges whether the current vehicle meets the intelligent charging condition; When the body domain controller determines that the current vehicle meets the intelligent power replenishment condition, the body domain controller sends a power replenishment request to the vehicle controller; After receiving the charging request, the vehicle controller requests the battery management system to close the high-voltage relay of the power battery; After the battery management system closes the high-voltage relay, the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery.

8. The vehicle according to claim 6 or 7, characterized in that The vehicle is also configured to: After the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the battery sensor determines whether the battery power is greater than a second threshold; When the battery sensor determines that the battery power is greater than a second threshold, the battery management system disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

9. The vehicle according to claim 6 or 7, characterized in that: The vehicle is also configured to: After the battery management system closes the high-voltage relay and the DC-DC converter converts the high-voltage electricity output by the power battery into 12V low-voltage electricity and charges the battery, the battery sensor determines whether the battery charging time is greater than a time threshold; When the battery sensor determines that the battery charging time is greater than the time threshold, the battery management system disconnects the high-voltage relay, and the DC-DC converter stops converting the high-voltage electricity output by the power battery into 12V low-voltage electricity.

10. The vehicle according to claim 6 or 7, characterized in that When all of the following conditions are met at the same time, the body domain controller determines that the current vehicle meets the intelligent power replenishment condition: the power of the power battery is greater than the third threshold, the front hood is closed, and the battery sensor has no faults.

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