Vehicle control method and device and storage medium

Abstract

The invention discloses a vehicle control method and device and a storage medium, and relates to the technical field of hybrid vehicles. According to the scheme, under the conditions that a target vehicle is in a high-load trailer state and the electric quantity of a power battery is in a low-electric-quantity interval, the target vehicle encounters high-load working conditions such as traction of a heavy-load trailer to climb and the like, and whether the target vehicle belongs to the high-load working conditions or not is judged according to working condition information; charging of the power battery is stopped under the high-load working condition; otherwise, the engine is controlled to drive the target vehicle, and the driving motor is driven to generate electricity so as to charge the power battery. Therefore, charging of the power battery is stopped in time, the total heat load of the engine is reduced, the overtemperature risk of the water temperature and the exhaust temperature of the engine is avoided, and therefore the heat damage problem caused by high temperature is avoided; on the other hand, insufficient vehicle driving force caused by forced limitation of engine torque output due to heat damage relief is avoided, and continuous and reliable traction power under the high-load working condition is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hybrid vehicles, in particular to a vehicle control method, device and storage medium. BACKGROUND

[0002] In the actual use of a hybrid vehicle, the scene of towing a trailer puts higher requirements on the power system of the vehicle. Compared with the conventional driving condition without a trailer, the overall load of the vehicle is significantly increased in the trailer state, and the vehicle is prone to enter a high-load operation mode.

[0003] In the high-load trailer scene, the engine needs to continuously output a large power to drive the vehicle and the trailer to travel, which causes the engine operating temperature to rise sharply, specifically, the engine water temperature rises rapidly, and then the overall environment temperature in the engine compartment rises. At the same time, the engine displacement and exhaust temperature increase significantly with the increase of the load, and when the high-temperature exhaust flows through the engine compartment and chassis area, the temperature of the parts around the exhaust system rises sharply. Finally, the problem of part heat damage is caused. SUMMARY

[0004] Therefore, the present application is committed to providing a vehicle control method, device and storage medium, which can help to avoid the heat damage problem of a hybrid vehicle.

[0005] According to a first aspect of the present application, a vehicle control method is provided, comprising: acquiring current power and working condition information of a target vehicle in a case that the target vehicle is in a heavy-load trailer state; the target vehicle comprises an engine, a drive motor and a power battery; the heavy-load trailer state is a state that the weight of a trailer towed by the target vehicle exceeds a preset weight threshold; if the current power belongs to a low power interval, determining whether the target vehicle belongs to a high-load working condition according to the working condition information; if the working condition information indicates that the target vehicle is in a high-load working condition, stopping charging the power battery; otherwise, controlling the engine to drive the target vehicle and drive the drive motor to generate electricity to charge the power battery. Thus, when the vehicle is in the extreme working condition of the trailer weight exceeding the threshold, the battery power being too low and the engine being in high-load driving, by stopping charging the power battery, the engine is prevented from simultaneously undertaking the tasks of driving and generating electricity, which can significantly reduce the load and thermal load of the engine, avoid the rapid rise of the engine water temperature and exhaust temperature due to the decrease of the thermal efficiency, and effectively reduce the risk of thermal damage of the engine compartment and the surrounding parts of the chassis under high temperature. At the same time, the engine torque output is not passively limited due to overheating, which ensures the continuous power supply of the vehicle in critical working conditions such as heavy-load climbing, and avoids the potential risk of power interruption.

[0006] Optionally, the working condition information comprises first slope information of a road where the target vehicle is located; and the determining whether the target vehicle belongs to a high-load working condition according to the working condition information comprises: determining whether the target vehicle belongs to a high-load working condition according to the first slope information. Thus, whether the target vehicle belongs to a high-load working condition is determined according to the first slope information of the road where the target vehicle is located, which is simple and intuitive, and can accurately identify the key working condition of climbing a slope that is prone to cause thermal damage, while avoiding misjudgment of short-time high-load working conditions such as starting and accelerating as high-load working conditions, thereby reducing unnecessary charging stop operations, effectively preventing and controlling thermal damage risks, ensuring the charging needs of the power battery under non-key working conditions, and helping to improve the operation rationality of the vehicle power system.

[0007] Optionally, the determining whether the target vehicle belongs to a high-load working condition according to the first slope information comprises: determining whether the target vehicle belongs to a high-load working condition according to whether a climbing time of the target vehicle reaches a first time threshold; the climbing time is a duration during which a slope indicated by the first slope information is not less than a preset slope threshold; if the climbing time of the target vehicle reaches the first time threshold, it is determined that the target vehicle belongs to a high-load working condition; otherwise, it is determined that the target vehicle is not in a high-load working condition. Thus, the high-load working condition is determined by the climbing time, which accurately distinguishes between short-time climbing and persistent high-load scenarios; it avoids unnecessary charging interruption caused by misjudgment in short-time climbing working conditions, and ensures the charging efficiency of the power battery; and it can stop charging in time in a real thermal damage risk working condition, effectively inhibiting the risk of thermal damage caused by engine overheating.

[0008] Optionally, the low power interval comprises a first power interval; an upper limit value of the first power interval is a power reserve threshold for determining whether the power of the drive battery is sufficient to provide assistance for a long time; a lower limit value of the first power interval is a recommended charging threshold for indicating a lower limit of safe discharge of the power battery; and the stopping charging the power battery comprises: if the climbing time of the target vehicle reaches the first time threshold, controlling the engine and the drive motor to output power simultaneously to drive the target vehicle. Thus, when the current power is in the first power interval, the power battery is stopped from being charged when the climbing time reaches the first time threshold, and the engine and the drive motor are controlled to output power simultaneously to drive the target vehicle. On the one hand, the power can be maintained stable by low-power charging in non-extreme working conditions, and on the other hand, the power can be supplemented by motor assistance when climbing continuously, thereby reducing the thermal load accumulation while ensuring sufficient power output, effectively balancing the needs of power maintenance and thermal damage prevention.

[0009] Optionally, the determining whether the target vehicle is in the high-load working condition according to the first slope information comprises: determining whether the target vehicle is in the high-load working condition according to whether the slope indicated by the first slope information reaches a preset slope threshold; if the slope indicated by the first slope information reaches the preset slope threshold, determining that the target vehicle is in the high-load working condition; otherwise, determining that the target vehicle is not in the high-load working condition. Compared with relying on indirect parameters such as vehicle speed or torque, the slope information can more essentially reflect the road conditions that cause sustained high load and heat dissipation deterioration. The determination method is simple and intuitive, significantly reduces the system operation complexity, and ensures the accuracy of high-load working condition identification. At the same time, unnecessary charging interruption is avoided in gentle slope or flat road working conditions, and the power battery charging efficiency is maintained.

[0010] Optionally, the low power interval is a second power interval; an upper limit value of the second power interval is a recommended charging threshold for indicating a lower limit of safe discharge of the power battery; a lower limit value of the second power interval is a forced protection threshold for indicating that the power battery is prohibited from discharging; and the stopping charging the power battery comprises: controlling the engine to drive the target vehicle, controlling the drive motor to be in a shutdown state, and controlling the power battery to supply power to a low-voltage system of the target vehicle. Thus, in the case that the current power is in the second power interval, if the slope indicated by the first slope information reaches the preset slope threshold, it is determined that the target vehicle is in the high-load working condition; the engine is controlled to drive the target vehicle, the drive motor is controlled to be in a shutdown state, and the power battery is controlled to supply power to the low-voltage system of the target vehicle. Thus, the additional load caused by the engine driving the drive motor to generate electricity is avoided, the engine thermal load is significantly reduced, and the risk of sudden rise of water temperature and exhaust temperature is directly alleviated; at the same time, the power battery is prevented from being deeply discharged in the low power interval, and the risk of accelerated degradation of battery life is avoided. Thus, while ensuring the power output of the high-load trailer climbing, the needs of thermal management and battery protection are also considered.

[0011] Optionally, the working condition information includes speed information and torque information of the engine, and gear information of a transmission in driving connection with the engine; the determining whether the target vehicle belongs to the high-load working condition according to the working condition information includes: in a case where the gear information indicates that the gear is not greater than a preset gear, determining whether the target vehicle belongs to the high-load working condition according to whether a torque exceeding time exceeds a second time threshold; the torque exceeding time is a duration that the torque information indicates that the torque exceeds a first torque threshold corresponding to the speed information. Thus, in a case where the gear information indicates that the gear is not greater than a preset gear, whether the target vehicle belongs to the high-load working condition is determined according to whether the duration that the engine torque exceeds the first torque threshold corresponding to the speed information exceeds the second time threshold; thus, in combination with the transmission gear and the engine torque exceeding time, the long-time over-load running condition of the engine under the low gear is accurately identified, and the short-time torque fluctuation can be effectively avoided from being misjudged as the high load, so that the timely starting of the heat hazard prevention measure is ensured, unnecessary intervention to the normal driving state is reduced, the heat load generated by the sustained high load of the engine is reduced, and the power output stability of the vehicle under the high-load trailer is ensured, and the heat management efficiency and the power performance demand are considered.

[0012] Optionally, the low power interval is a third power interval; an upper limit value of the third power interval is a forced protection threshold value used to indicate that the power battery is prohibited from discharging; and the stopping charging the power battery includes: controlling the driving motor to stop, controlling the engine to drive the target vehicle, performing a torque limiting and speed reducing process on the engine, and outputting prompt information for prompting the vehicle to stop and generate power. Thus, in a case where the current power is in the third power interval and the torque exceeds the limit under the low gear, it is determined that the target vehicle is in the high-load working condition; the driving motor is controlled to stop, the engine is controlled to drive the target vehicle, a torque limiting and speed reducing process is performed on the engine, and the user is guided to stop and generate power. First, the additional power load caused by the driving motor generating power is eliminated, and the engine power is concentrated on maintaining the driving force of the vehicle; second, the heat load is actively reduced by the torque limiting and speed reducing process, so as to avoid the heat hazard risk caused by the deterioration of the heat dissipation condition; and the user is guided to stop and generate power, so as to timely escape from the high-load working condition to the safe charging mode, and to block the sustained high-load running state of the engine, thereby effectively reducing the heat hazard risk and preventing the damage of the power battery.

[0013] According to a second aspect of the present application, a vehicle control device is provided, including: The acquisition module is configured to acquire current power and working condition information of the target vehicle in a case where the target vehicle is in a heavy-load trailer state; the target vehicle includes an engine, a driving motor and a power battery; and the heavy-load trailer state is a state in which the weight of a trailer towed by the target vehicle exceeds a preset weight threshold. a judging module, configured to determine whether the target vehicle belongs to a high-load working condition according to the working condition information if the current power belongs to the low power interval; a control module, configured to stop charging the power battery if the working condition information indicates that the target vehicle is in the high-load working condition, or control the engine to drive the target vehicle and drive the drive motor to generate electricity to charge the power battery.

[0014] According to a third aspect of the present application, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; and the processor is configured to execute the method according to any one of the above embodiments.

[0015] According to a fourth aspect of the present application, a vehicle is provided, comprising the electronic device described above.

[0016] According to a fifth aspect of the present application, a computer-readable storage medium is provided, the storage medium storing a computer program for executing the method according to any one of the above embodiments.

[0017] The present application provides a vehicle control method and device and a storage medium. The method comprises: determining whether the target vehicle belongs to a high-load working condition according to working condition information if the target vehicle is in a high-load trailer state and the power battery power is in a low power interval, and the target vehicle simultaneously encounters a high-load working condition such as towing a heavy trailer uphill; stopping charging the power battery in the high-load working condition; otherwise, controlling the engine to drive the target vehicle and driving the drive motor to generate electricity to charge the power battery. Thus, by stopping charging the power battery in time, the overall thermal load of the engine is significantly reduced to avoid the risk of overheating of the engine water temperature and exhaust gas temperature, thereby preventing the heat damage problem of the engine compartment and chassis key components caused by high temperature. On the other hand, it avoids the insufficient driving force of the vehicle caused by forcedly limiting the engine torque output to relieve the heat damage, thereby ensuring the continuous and reliable traction power under high-load working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 shows a flowchart of a vehicle control method according to an embodiment of the present application.

[0019] Figure 2 Fig. 2 shows a structural diagram of a hybrid vehicle according to an embodiment of the present application.

[0020] Figure 3 Fig. 3 shows a block diagram of a vehicle control device according to an embodiment of the present application.

[0021] Figure 4 Fig. 4 shows a structural block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] Summary Hybrid vehicles are increasingly frequently undertaking towing tasks, such as towing a house car, a faulty vehicle or various transport trailers. The weight of the towed trailer shows a trend of continuous increase, which directly leads to a substantial increase in the overall load level of the hybrid vehicle, posing unprecedented challenges to the entire vehicle power system. This high load demand becomes particularly severe when the vehicle encounters a continuous climbing working condition, especially when the state of charge (SOC) of the power battery is at a low level.

[0024] Under such extreme working conditions, the engine undertakes an extremely demanding power output task. On the one hand, the engine must output extremely high torque to overcome the gravitational component of the vehicle itself and the towed trailer, ensuring that the vehicle has sufficient driving force to complete the climbing. On the other hand, due to insufficient battery power, the engine also needs to output additional power to drive the generator to quickly charge the power battery in a high-power mode. This demand for simultaneously meeting high traction force and high charging power forces the engine to run in a high-load state for a long time, even close to its design limit boundary.

[0025] The direct consequence of the continuous high-load operation of the engine is that its thermal efficiency decreases significantly, and the heat generated by the internal combustion process increases sharply, causing the engine coolant temperature and exhaust gas temperature to rise rapidly. At the same time, the vehicle speed is generally reduced under the climbing working condition, and the airflow in the engine compartment and the chassis is greatly reduced. The superposition of the two makes the vehicle's heat dissipation capacity severely insufficient, and the heat dissipation condition deteriorates sharply.

[0026] With the continuous rise of the engine water temperature and the exhaust gas temperature, the high-temperature gas accumulated in the engine compartment cannot be effectively discharged, forming a local high-temperature environment. At the same time, the heat radiated and conducted around the exhaust system also increases significantly. This directly leads to a sharp rise in the temperature of the engine compartment and the components near the exhaust path of the chassis, posing a serious risk of heat damage.

[0027] Although theoretically, heat insulation materials can be installed to block heat transfer, in actual engineering arrangement, many components around cannot be installed with heat insulation measures due to layout, cost and weight factors. Therefore, the high-load operation of the engine caused by towing heavy load climbing and the resulting heat damage risk have become an engineering problem that needs to be solved in the current hybrid vehicle technology field.

[0028] To solve the above problems, in the case that the target vehicle is in a high-load trailer state and the power battery is in a low power interval, the target vehicle is simultaneously subjected to high-load working conditions such as climbing a heavy load trailer, according to the working condition information, it is judged whether the target vehicle belongs to a high-load working condition; in the high-load working condition, the power battery is stopped from being charged; otherwise, the engine is controlled to drive the target vehicle and drive the motor generator to generate electricity to charge the power battery. Thus, by stopping charging the power battery in time, the overall thermal load of the engine is significantly reduced to avoid the risk of over-temperature of the engine water temperature and exhaust temperature, thereby preventing the heat damage problem of the engine compartment and the key parts of the chassis caused by high temperature; on the other hand, it avoids the insufficient driving force of the vehicle caused by forcedly limiting the torque output of the engine to ensure the continuous and reliable traction power under high-load working conditions.

[0029] After introducing the basic principles of the present application, various non-limiting embodiments of the present application will be specifically introduced with reference to the accompanying drawings.

[0030] Exemplary method Figure 1 is a flowchart of a vehicle control method provided by an embodiment of the present application. Figure 1 The method is executed by a computing device, for example, a vehicle-mounted computing device, a computing device connected with vehicle data, and the present application does not limit this. As Figure 1 The method includes the following contents: Step S110: In the case that the target vehicle is in a heavy load trailer state, the current power and working condition information of the target vehicle are obtained; the target vehicle includes an engine, a drive motor and a power battery; the heavy load trailer state is a state that the trailer weight of the target vehicle exceeds a preset weight threshold.

[0031] In the embodiment of the present application, the target vehicle can refer to a hybrid vehicle, and its power system can include an engine, a drive motor and a power battery. The engine is usually an internal combustion engine, which can output power by burning fuel; the drive motor can provide auxiliary driving force or pure electric driving force in the electric motor mode, and convert mechanical energy into electrical energy stored in the power battery or regenerate braking to recover energy in the generator mode; both can independently drive the wheels or cooperate with each other to drive the wheels to meet different driving needs. The power battery as an energy storage unit can provide electrical energy input for the drive motor and can also receive the energy generated by the drive motor.

[0032] In the embodiment of the present application, the driving motor is used to drive the vehicle and generate electricity; and specific forms can include common hybrid motor layout forms such as P2, P2.5, etc. Among them, the P2 architecture motor is located between the engine and the gearbox; and the P2.5 architecture motor is integrated in the gearbox.

[0033] In the embodiment of the present application, the current power can include the state of charge (SOC) of the power battery, and can also refer to the current voltage of the power battery.

[0034] In the embodiment of the present application, the working condition information is used to determine whether the target vehicle belongs to a high-load working condition, and can include current slope, altitude, environmental temperature and other environmental information, or engine speed, torque and other parameters reflecting engine load.

[0035] In the embodiment of the present application, the trailer can be a motor home, a faulty vehicle, a transport trailer and other devices that need to be towed.

[0036] In the embodiment of the present application, the preset weight threshold is a preset calibration value of the vehicle, which can be determined by experiment in the vehicle design stage.

[0037] In the embodiment of the present application, the heavy trailer state is the running state when the weight of the trailer towed by the target vehicle exceeds the above-mentioned preset weight threshold.

[0038] Step S120: If the current power belongs to the low power interval, determine whether the target vehicle belongs to a high-load working condition according to the working condition information.

[0039] In the embodiment of the present application, the low power interval, i.e. the interval in which the power battery has low power and needs to be charged, can be determined according to the vehicle design calibration.

[0040] In the embodiment of the present application, the high-load working condition is a working condition in which the vehicle has high running load, for example, a working condition in which the current slope is large when climbing a slope, or a working condition in which the engine speed and torque are at a high level. In the case of meeting the high-load working condition, if the engine is used to drive the target vehicle and drive the driving motor to generate electricity at the same time, the target vehicle has a risk of thermal damage.

[0041] In the embodiment of the present application, the thermal damage is the problem of thermal damage of parts, performance degradation and other problems caused by excessive temperature of the engine and surrounding parts.

[0042] Step S130: If the working condition information indicates that the target vehicle is in a high-load working condition, stop charging the power battery.

[0043] In the embodiment of the present application, stopping charging the power battery can include switching the motor to a shutdown state or a power-assisted state.

[0044] In the embodiment of the present application, after the stopping of charging the power battery, the power battery can be cut off from supplying power to the low-voltage system or the high-voltage system, or the necessary power supply of the power battery to the low-voltage system or the high-voltage system can be maintained.

[0045] Step S140: Otherwise, the engine is controlled to drive the target vehicle, and the driving motor is driven to generate electricity to charge the power battery.

[0046] In the embodiment of the present application, when the target vehicle is in a working condition other than the high-load working condition, the engine is controlled to drive the target vehicle, and the driving motor is driven to generate electricity.

[0047] In the embodiment of the present application, when the target vehicle is in the heavy-load trailer state, the current power and working condition information of the target vehicle are acquired; if the current power belongs to a low power interval, it is determined according to the working condition information whether the target vehicle belongs to a high-load working condition; if the working condition information indicates that the target vehicle is in a high-load working condition, the charging of the power battery is stopped; otherwise, the engine is controlled to drive the target vehicle, and the driving motor is driven to generate electricity to charge the power battery. When the vehicle is in the extreme working condition of the trailer weight exceeding the threshold, the battery power being too low, and the engine being in high-load driving, the charging of the power battery is stopped to avoid the engine simultaneously undertaking the driving and power generation tasks, which can significantly reduce the load and thermal load of the engine, avoid the rapid rise of the engine water temperature and exhaust temperature due to the decrease of thermal efficiency, and effectively reduce the risk of thermal damage of the engine compartment and the surrounding parts of the chassis due to high temperature. At the same time, the engine torque output is not limited due to overheating, which ensures the continuous power supply of the vehicle in the key working conditions such as heavy-load climbing, and avoids the potential risk of power interruption.

[0048] Based on the method in the embodiment of the present application, the present specification also provides some specific embodiments of the method, which are described below. Figure 1

[0049] Optionally, the working condition information includes first slope information of a road where the target vehicle is located. The determination of whether the target vehicle belongs to a high-load working condition according to the working condition information includes: The determination of whether the target vehicle belongs to a high-load working condition according to the first slope information.

[0050] In the embodiment of the present application, the first slope information is used to represent the slope information of the road where the target vehicle is currently located.

[0051] ​In actual application, the vehicle in the trailer mode has a high load but a short duration in the starting and accelerating conditions, and the probability of actually causing heat damage is low. In the climbing condition, especially in the long-time continuous climbing condition, the engine runs at a high load for a long time, and the climbing speed is reduced, which deteriorates the heat dissipation condition. Therefore, the trailer climbing is the main cause of the heat damage risk.

[0052] In the embodiment of the present application, whether the target vehicle belongs to a high-load condition is determined according to the first slope information of the road where the target vehicle is located. The determination method is simple and intuitive, and can accurately identify the key condition of climbing that is prone to cause heat damage, while avoiding misjudgment of short-time high-load conditions such as starting and accelerating as high-load conditions, thereby reducing unnecessary charging stop operations, effectively preventing and controlling heat damage risks, ensuring the charging demand of the power battery in non-key conditions, and helping to improve the rationality of the operation of the vehicle power system.

[0053] Optionally, the determination of whether the target vehicle belongs to a high-load condition according to the first slope information comprises: determining whether the target vehicle belongs to a high-load condition according to whether the climbing time of the target vehicle reaches a first time threshold; the climbing time is the duration when the slope indicated by the first slope information is not less than a preset slope threshold; if the climbing time of the target vehicle reaches the first time threshold, it is determined that the target vehicle belongs to a high-load condition; otherwise, it is determined that the target vehicle is not in a high-load condition.

[0054] In the embodiment of the present application, the preset slope threshold is a pre-set slope critical value, which can be used as a slope reference value for determining a high-load condition. The value is determined through vehicle calibration experiments, for example, 10°. The setting basis of the preset slope threshold is the critical slope condition under which the engine enters a high-torque output state when the trailer weight reaches a preset weight threshold.

[0055] In the embodiment of the present application, the climbing time is defined as the duration when the first slope information is not less than the preset slope threshold, which is used to represent the duration of the continuous high-load operation of the engine in the climbing condition. It can also be extended to the cumulative duration of the slope exceeding the preset slope threshold within a set time window.

[0056] The analysis shows that although the short-time climbing conditions such as climbing up a ramp and passing an overpass have instantaneous high loads, the heat load does not exceed the processing capacity of the heat dissipation system due to the insufficient duration, and is not enough to cause serious heat damage problems. On the contrary, in the continuous climbing condition, the engine runs at a high torque for a long time, the heat generation increases dramatically due to the decrease of thermal efficiency, and the air cooling efficiency is reduced due to the decrease of the climbing speed, which significantly increases the probability and severity of heat damage.

[0057] In the embodiments of the present application, the high-load working condition is determined by the climbing time, and the short-time climbing and the persistent high-load scene are accurately distinguished. The unnecessary charging interruption caused by misjudgment in the short-time climbing working condition is avoided, and the charging efficiency of the power battery is ensured. In addition, the charging can be stopped in time in the real heat damage risk working condition, and the risk of heat damage caused by the overheating of the engine is effectively inhibited.

[0058] Optionally, the low-power interval includes a first power interval; an upper limit value of the first power interval is a power reserve threshold value for determining whether the power of the drive battery is sufficient to provide assistance for a long time; and a lower limit value of the first power interval is a recommended charging threshold value for representing a lower limit of safe discharge of the power battery. The stopping of charging the power battery includes: If the climbing time of the target vehicle reaches the first time threshold value, the engine and the drive motor are controlled to output power to drive the target vehicle at the same time.

[0059] In the embodiments of the present application, the assistance support power threshold value is used to determine whether the current power of the power battery has the ability to continuously support the drive motor assistance. The threshold value is calibrated according to the chemical characteristics of the power battery and the system power demand, for example, set to 30%.

[0060] In the embodiments of the present application, the recommended charging threshold value represents the critical point of the state of charge of the safe discharge of the power battery, for example, set to 20%. Discharging below this threshold value will accelerate the aging of the battery and trigger the discharge power limiting mechanism. When the power decreases to the recommended charging threshold value, the user is generally prompted that the current power is low and the power battery needs to be charged.

[0061] In the embodiments of the present application, the first power interval is defined as the state of charge interval between the assistance support power threshold value and the recommended charging threshold value. The battery in this interval can maintain the basic assistance function under the premise of ensuring the service life and safety, for example, the power interval between 20% and 30%.

[0062] The analysis shows that when the power is in the first power interval, the charging power is generally low, and only the power balance needs to be maintained. Therefore, the engine reserve power is generally sufficient at this time, and the charging does not need to be stopped immediately, but can be stopped after the climbing time reaches the first time threshold value. At the same time, although the power in this interval is not high, the power battery still has the ability to provide basic assistance.

[0063] In the embodiment of the present application, when the current power is located in the first power interval, the charging to the power battery is stopped after the climbing time reaches the first time threshold, and the engine and the drive motor are controlled to jointly output power to drive the target vehicle. On the one hand, the power can be maintained stable by low-power charging in a non-extreme working condition, and on the other hand, the power can be supplemented by the motor assistance when continuously climbing to avoid the engine bearing too high load alone, so as to reduce the accumulation of thermal load while ensuring sufficient power output, effectively balancing the needs of power maintenance and thermal hazard prevention and control.

[0064] Optionally, the determining whether the target vehicle belongs to the high-load working condition according to the first slope information comprises: determining whether the target vehicle belongs to the high-load working condition according to whether the slope indicated by the first slope information reaches a preset slope threshold value; if the slope indicated by the first slope information reaches the preset slope threshold value, it is determined that the target vehicle is in the high-load working condition; otherwise, it is determined that the target vehicle is not in the high-load working condition.

[0065] In the embodiment of the present application, the preset slope threshold value is a pre-set slope critical value, which can be used to determine the slope reference value of the high-load working condition. The value is determined through vehicle calibration experiment, for example, 10°. The setting basis of the preset slope threshold value is the critical slope condition of the engine entering the high-torque output state when the trailer weight reaches the preset weight threshold value.

[0066] In the embodiment of the present application, whether the target vehicle belongs to the high-load working condition is determined according to whether the slope indicated by the first slope information reaches the preset slope threshold value. Compared with relying on indirect parameters such as vehicle speed or torque, the slope information can more essentially reflect the road conditions that cause continuous high load and heat dissipation deterioration. The determination method is simple and intuitive, significantly reduces the system operation complexity on the premise of ensuring the accuracy of high-load working condition identification. At the same time, unnecessary charging interruption is avoided in the gentle slope or flat road working condition, and the charging efficiency of the power battery is maintained.

[0067] Optionally, the low power interval is a second power interval; the upper limit value of the second power interval is a recommended charging threshold value for indicating the lower limit of safe discharge of the power battery; and the lower limit value of the second power interval is a forced protection threshold value for indicating that the power battery is prohibited from discharging. The stopping of the charging to the power battery comprises: controlling the engine to drive the target vehicle, controlling the drive motor to be in a shutdown state, and controlling the power battery to supply power to a low-voltage system of the target vehicle.

[0068] In the embodiments of the present application, the recommended charging threshold represents a state of charge critical point at which the power battery is safe to discharge, for example, 20%. Discharging below this threshold continuously will accelerate battery aging and trigger a discharge power limiting mechanism. When the power drops to the recommended charging threshold, the user is generally prompted that the current power is low and the power battery needs to be charged.

[0069] In the embodiments of the present application, the forced protection threshold represents a state of charge critical point at which the power battery is prohibited to discharge, for example, 16%. If the discharge continues below this threshold, the power battery will be deeply discharged, and the battery cycle life will rapidly degrade, at which time a forced power-off protection mechanism needs to be triggered to avoid irreversible damage.

[0070] In the embodiments of the present application, the second power interval is defined as the state of charge interval between the recommended charging threshold and the forced protection threshold.

[0071] Analysis shows that when the power is in the second power interval, high-power charging is generally required to quickly increase the battery power to the high-efficiency working interval. Therefore, at this time, the engine reserve power is insufficient, and when the vehicle is simultaneously in a trailer weight threshold and in a climbing working condition, the charging needs to be stopped immediately. At the same time, although the power in this interval is not high, the power battery needs to limit the output power to reduce the depth of discharge as much as possible.

[0072] In the embodiments of the present application, if the first slope information indicates that the slope reaches the preset slope threshold, it is determined that the target vehicle is in a high-load working condition when the current power is in the second power interval; the engine is controlled to drive the target vehicle, the drive motor is controlled to be in a shutdown state, and the power battery is controlled to supply power to the low-voltage system of the target vehicle. In this way, the additional load caused by the engine driving the drive motor to generate electricity is avoided, the engine thermal load is significantly reduced, and the risk of sudden rise in water temperature and exhaust temperature is directly alleviated; at the same time, the power battery is prevented from being deeply discharged in the low-power interval, and the risk of accelerated degradation of battery life is avoided. In this way, the power output is guaranteed when the high-load trailer climbs, and the needs of thermal management and battery protection are taken into account.

[0073] Optionally, the working condition information includes speed information and torque information of the engine, and gear position information of a transmission in transmission connection with the engine. The determination of whether the target vehicle belongs to a high-load working condition according to the working condition information includes: In a case where the gear position indicated by the gear position information is not greater than a preset gear position, whether the target vehicle belongs to a high-load working condition is determined according to whether the torque exceeding time exceeds a second time threshold; the torque exceeding time is a duration that the torque indicated by the torque information exceeds a first torque threshold corresponding to the speed information.

[0074] In the embodiments of the present application, the speed information refers to the current operating speed of the engine, usually in units of revolutions per minute.

[0075] In the embodiments of the present application, the torque information refers to the torque size output by the engine, used to represent the power strength of the engine driving the vehicle.

[0076] In the embodiments of the present application, the gear information refers to the current gear of the transmission connected with the engine, which can also represent the size of the transmission ratio.

[0077] In the embodiments of the present application, the first torque threshold is defined as the upper limit boundary value that the real-time output torque of the engine can reach. A calibration table is pre-stored in the vehicle control system, which records the torque upper limit reference value corresponding to the typical speed point; the system queries the calibration table according to the real-time speed information, and generates the first torque threshold by interpolation calculation of adjacent speed points. Alternatively, a dynamic boundary range is determined based on the engine MAP graph: the lower limit of the range is the maximum sustainable torque allowed at each speed under the current operating condition, and the upper limit is the physical limit torque boundary of the engine, i.e. the envelope curve of the characteristic curve outside the MAP graph.

[0078] In the embodiments of the present application, the torque exceeding time can refer to the cumulative duration that the actual output torque of the engine continuously exceeds the first torque threshold, used to quantify the over-limit load running state of the engine.

[0079] It is found through analysis that hybrid vehicles are generally automatic gears, and when encountering high load conditions, they usually need to reduce the gear to increase the transmission ratio, thereby amplifying the torque; at the same time, the vehicle speed is low in low gear state, which will cause the heat dissipation conditions of the engine compartment and chassis to deteriorate.

[0080] In the embodiments of the present application, when the gear indicated by the gear information is not greater than the preset gear, it is judged whether the target vehicle belongs to a high load condition according to whether the duration that the engine torque exceeds the first torque threshold corresponding to the speed information exceeds a second time threshold; thereby, in combination with the transmission gear and the torque exceeding time of the engine, the long-time over-load running condition of the engine under low gear is accurately identified, which can effectively avoid misjudging short-time torque fluctuation as high load, so as to ensure timely starting of heat hazard prevention measures while reducing unnecessary intervention on normal driving state, which not only reduces the heat load generated by the engine due to continuous high load, but also guarantees the power output stability of the vehicle under high load trailer, and balances the heat management efficiency and power performance requirements.

[0081] Optionally, the low power interval is a third power interval; and an upper limit value of the third power interval is a forced protection threshold for indicating that discharging of the power battery is prohibited. The stopping charging the power battery comprises: controlling the driving motor to stop, controlling the engine to drive the target vehicle, performing a torque limiting and speed reducing process on the engine, and outputting prompt information for prompting parking power generation.

[0082] In the embodiment of the present application, the forced protection threshold represents a critical point of state of charge at which the power battery is prohibited from discharging, for example, 16%. If the discharge continues below this threshold, the power battery will be deeply discharged, and the battery cycle life will rapidly decrease. At this time, the forced power-off protection mechanism needs to be triggered to avoid irreversible damage.

[0083] In the embodiment of the present application, the third power interval is a state of charge interval below the forced protection threshold, that is, the battery is in a state of serious power loss.

[0084] In the embodiment of the present application, the prompt information is used to remind the user to supplement the power by parking power generation, and can be output in the form of vehicle instrument display or voice broadcast.

[0085] The analysis shows that when the power is in the third power interval, high-power charging is usually needed to quickly increase the battery power. Therefore, at this time, the engine output power is close to the peak value, and the reserve power is severely insufficient. When the vehicle is simultaneously in the state of towing a trailer, overloading, and low gear, the torque exceeds the standard, the charging must be stopped immediately. At the same time, the power battery needs to be prohibited from discharging to prevent the cycle life from decreasing.

[0086] In the embodiment of the present application, in the case that the current power is in the third power interval and the torque in the low gear exceeds the standard, it is determined that the target vehicle is in a high-load working condition; the driving motor is controlled to stop, the engine is controlled to drive the target vehicle, the torque limiting and speed reducing process is performed on the engine, and the user is guided to park and generate power. First, the additional power load caused by the driving motor power generation is eliminated, and the engine power is concentrated on maintaining the vehicle driving force. Second, the thermal load is actively reduced by torque limiting and speed reduction, to avoid the risk of thermal damage caused by deteriorated heat dissipation conditions. At the same time, the user is guided to park and generate power, to timely escape from the high-load working condition to the safe charging mode, to block the continuous high-load running state of the engine, thereby effectively reducing the risk of thermal damage and preventing the damage of the power battery.

[0087] Optionally, the method further comprises: In the case that the target vehicle is towing a trailer, the wheel-end torque and the second slope information of the target vehicle in a target stage are acquired; the target stage includes a starting stage or an accelerating stage; According to whether the wheel-end torque reaches a second torque threshold corresponding to the second slope information, it is determined whether the target vehicle is in a heavy trailer state.

[0088] In the embodiment of the present application, whether the target vehicle is towing a trailer is determined according to a preset trailer state identification signal of the target vehicle, which can be detected by a light circuit connected with the trailer.

[0089] In the embodiment of the present application, the wheel end torque refers to the real-time output torque value of the driving wheel of the vehicle, which is calculated by the output torque of the engine, the output torque of the generator or the generated torque.

[0090] In the embodiment of the present application, the second slope information represents the slope data of the road where the target vehicle is located in the target stage, which is detected by a slope sensor.

[0091] In the embodiment of the present application, the starting stage refers to the continuous process in which the target vehicle starts to move from a static state and the vehicle speed is lower than a preset vehicle speed threshold.

[0092] In the embodiment of the present application, the acceleration stage refers to the continuous process in which the vehicle speed of the target vehicle continuously increases.

[0093] The second torque threshold is the theoretical required torque value required to overcome the slope resistance corresponding to the second slope information when the trailer weight reaches a preset weight threshold, which can be used as a wheel end torque critical value for determining whether the target vehicle is in a heavy trailer state. Specifically, the second slope information is rounded up to a preset discrete point, and the slope-torque mapping table is queried to obtain; or it is generated based on the interpolation calculation of adjacent discrete points.

[0094] In the embodiment of the present application, in the case that the target vehicle is towing a trailer, the wheel end torque and the second slope information of the target vehicle in the target stage are obtained; the target stage includes a starting stage or an acceleration stage; whether the target vehicle is in a heavy trailer state is determined according to whether the wheel end torque reaches the second torque threshold corresponding to the second slope information; in the key stage of vehicle starting or acceleration, the actual wheel end torque is compared with the theoretical required torque required by the current slope, so that the trailer quality can be directly perceived. Compared with relying only on a preset weight threshold or a trailer signal, the trailer quality can be accurately detected, and whether the target vehicle is currently in a heavy trailer state can be accurately determined.

[0095] Figure 2 A structure schematic diagram of a hybrid vehicle provided by the embodiment of the present application is shown. The vehicle includes an engine, a driving motor in P2 form, a transmission, a transfer, a reducer and two power batteries. The engine and the driving motor can independently drive the wheels, or jointly drive the wheels. It should be particularly pointed out that the above vehicle structure is not a limitation of the present application, but is only an exemplary description.

[0096] The thresholds of the power battery from high to low can include: a pure electric driving threshold (for example, 40%), a power reserve threshold (for example, 30%), a recommended charging threshold (for example, 20%), and a forced protection threshold (for example, 16%).

[0097] In the case that the target vehicle is towing a trailer, wheel end torque of the target vehicle at a target stage and second slope information are acquired; the target stage includes a starting stage or an accelerating stage; whether the target vehicle is in a heavy trailer state is determined according to whether the wheel end torque reaches a second torque threshold corresponding to the second slope information.

[0098] In the case that the target vehicle is in a heavy trailer state, whether the target vehicle belongs to a high-load working condition is determined according to current power and working condition information.

[0099] If the current power is greater than the pure electric driving threshold, the target vehicle can be allowed to adopt a pure electric mode. Specifically, if the engine is already in a starting state, the vehicle will be switched to an intelligent hybrid mode and the power battery power will be maintained at a power preservation target value; that is, the engine is controlled in a high-efficiency zone, the drive motor is switched between the power generation mode and the power assistance mode, and the power balance of the power battery is maintained as much as possible. If the engine is not started, the pure electric mode can be continued.

[0100] If the current power is between the pure electric driving threshold and the power reserve threshold (for example, 30%-40%), the intelligent hybrid mode can be run, and the power battery power is maintained at a power preservation target value (for example, set to the power reserve threshold). In this power interval, the pure electric mode is generally not allowed. If the power decreases to this power interval, the intelligent hybrid mode is automatically switched to run.

[0101] If the current power is between the power reserve threshold and the recommended charging threshold (i.e., the first power interval, such as 20%-30%), the power battery will stop charging when the climbing time reaches the first time threshold, and the engine and the drive motor will be controlled to jointly output power to drive the target vehicle. If the vehicle is not in a climbing working condition, or the climbing duration does not exceed the preset first time threshold, the engine drives the target vehicle, and the drive motor generates electricity to charge the power battery.

[0102] If the current power is between the recommended charging threshold and the forced protection threshold (i.e. the second power interval, 16%-20%), and the first slope information indicates that the slope reaches the preset slope threshold, it is determined that the target vehicle is in a high-load working condition; the engine is controlled to drive the target vehicle, the drive motor is controlled to be in a shutdown state, and the power battery is controlled to supply power to the low-voltage system of the target vehicle. If the vehicle is not in a climbing working condition, the engine is controlled to drive the target vehicle, and the drive motor is controlled to generate electricity to charge the power battery.

[0103] If the current power is lower than the forced protection threshold (i.e. the third power interval, SOC<16%), and the torque in the low gear exceeds the standard, it is determined that the target vehicle is in a high-load working condition; the drive motor is controlled to be in a shutdown state, the engine is controlled to drive the target vehicle, the engine is subjected to a torque limiting and speed reducing process, and the user is guided to stop and generate electricity. Otherwise, the engine is controlled to drive the target vehicle, and the drive motor is controlled to generate electricity to charge the power battery.

[0104] Exemplary apparatus The device embodiment of the present application can be used to execute the method embodiment of the present application. For details not disclosed in the device embodiment of the present application, please refer to the method embodiment of the present application.

[0105] Figure 3 A block diagram of a vehicle control device provided by an embodiment of the present application is shown. As shown in the figure, Figure 3 The device 300 includes: The acquisition module 310 is configured to acquire current power and working condition information of a target vehicle in a heavy trailer state of the target vehicle; the target vehicle includes an engine, a drive motor and a power battery; the heavy trailer state is a state in which the weight of a trailer towed by the target vehicle exceeds a preset weight threshold; The judgment module 320 is configured to determine whether the target vehicle belongs to a high-load working condition according to the working condition information if the current power belongs to a low power interval; wherein, if the engine is used to drive the target vehicle and drive the drive motor to generate electricity at the same time, the target vehicle has a risk of heat damage under the condition of meeting the high-load working condition; The control module 330 is configured to stop charging the power battery if the working condition information indicates that the target vehicle is in a high-load working condition; otherwise, the engine is controlled to drive the target vehicle, and the drive motor is controlled to generate electricity to charge the power battery.

[0106] Optionally, the working condition information includes first slope information of a road where the target vehicle is located; The judging module 320 is configured to determine whether the target vehicle belongs to a high-load working condition according to the first slope information.

[0107] Optionally, the judging module 320 is configured to: determine whether the target vehicle belongs to a high-load working condition according to whether a climbing time of the target vehicle reaches a first time threshold, the climbing time being a duration during which a slope indicated by the first slope information is not less than a preset slope threshold; if the climbing time of the target vehicle reaches the first time threshold, determine that the target vehicle belongs to a high-load working condition; otherwise, determine that the target vehicle is not in a high-load working condition.

[0108] Optionally, the low-power interval includes a first power interval, an upper limit value of the first power interval being a power reserve threshold used for determining whether the power of the driving battery is sufficient to provide assistance for a long time, and a lower limit value of the first power interval being a recommended charging threshold used for indicating a lower limit of safe discharge of the power battery. The control module 330 is configured to control the engine and the driving motor to simultaneously output power to drive the target vehicle if the climbing time of the target vehicle reaches the first time threshold.

[0109] Optionally, the judging module 320 is configured to: determine whether the target vehicle belongs to a high-load working condition according to whether a slope indicated by the first slope information reaches a preset slope threshold; if the slope indicated by the first slope information reaches the preset slope threshold, determine that the target vehicle is in a high-load working condition; otherwise, determine that the target vehicle is not in a high-load working condition.

[0110] Optionally, the low-power interval is a second power interval, an upper limit value of the second power interval being a recommended charging threshold used for indicating a lower limit of safe discharge of the power battery, and a lower limit value of the second power interval being a forced protection threshold used for indicating that the power battery is prohibited from discharging. The control module 330 is configured to control the engine to drive the target vehicle, control the driving motor to be in a shutdown state, and control the power battery to supply power to a low-voltage system of the target vehicle.

[0111] Optionally, the working condition information includes speed information and torque information of the engine and gear position information of a transmission in transmission connection with the engine. The judging module 320 is configured to, when the gear indicated by the gear information is not greater than a preset gear, judge whether the target vehicle belongs to a high-load working condition according to whether a torque exceeding time exceeds a second time threshold, the torque exceeding time being a duration that the torque indicated by the torque information exceeds a first torque threshold corresponding to the rotation speed information.

[0112] Optionally, the low power interval is a third power interval, and an upper limit value of the third power interval is a forced protection threshold used to indicate that the power battery is prohibited from discharging. The control module 330 is configured to control the driving motor to stop, control the engine to drive the target vehicle, perform a torque limiting and speed reducing process on the engine, and output prompt information for prompting parking power generation.

[0113] Optionally, the judging module 320 is further configured to: In a case where the target vehicle is towing a trailer, obtain wheel end torque and second slope information of the target vehicle at a target stage, the target stage including a starting stage or an accelerating stage. According to whether the wheel end torque reaches a second torque threshold corresponding to the second slope information, judge whether the target vehicle is in a heavy trailer state.

[0114] Exemplary electronic device Hereinafter, an electronic device according to an embodiment of the present application will be described with reference to the accompanying drawings. Figure 4 FIG. 1 illustrates a block diagram of an electronic device according to an embodiment of the present application. Figure 4 FIG. 2 illustrates a block diagram of an electronic device according to an embodiment of the present application.

[0115] As shown in FIG. 4, the electronic device 400 includes one or more processors 410 and a memory 420. Figure 4 The processor 410 can be a processing unit having data processing capability and / or instruction execution capability, and can control other components in the electronic device 400 to perform desired functions.

[0116]

[0117] ​In particular, the processor 410 can be a general purpose processor, such as a general purpose central processing unit (CPU), a microprocessor, etc., or can be a specific application integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the present application. It can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component. The processor 410 can also include a main processor, and can also include a baseband chip, a modem, etc.

[0118] The memory 420 can include one or more computer program products, which can include various forms of computer readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may, for example, include read only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions can be stored on the computer readable storage medium, and the processor 410 can run the program instructions to implement the vehicle control method of the various embodiments of the present application described above and / or other desired functions. Various contents such as category correspondence relationship, etc. can also be stored in the computer readable storage medium.

[0119] In one example, the electronic device 400 can further include an input device 430 and an output device 440, which are interconnected by a bus system and / or other forms of connection mechanism (not shown).

[0120] In addition, the input device 430 can also receive data and information input by the user, such as keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, pedometer or gravity sensor, etc. The output device 440 can output various information to the outside. The output device 440 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, etc.

[0121] Of course, in order to simplify, Figure 4 Only some of the components in the electronic device 400 related to the present application are shown in the figure, and components such as buses, input / output interfaces, etc. are omitted. In addition, according to the specific application, the electronic device 400 can also include any other appropriate components.

[0122] Exemplary vehicle In addition to the above method and device, the embodiments of the present application can also be a vehicle including a vehicle body and the electronic device.

[0123] Exemplary computer program product and computer readable storage medium In addition to the methods and devices described above, embodiments of the present application can also be a computer program product including computer program instructions that, when run by a processor, cause the processor to perform steps of the vehicle control method according to various embodiments of the present application described in the above “Exemplary Method” section of the specification.

[0124] The computer program product can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++, etc., and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device or entirely on the remote computing device or server.

[0125] In addition, embodiments of the present application can also be a computer readable storage medium having stored thereon computer program instructions which, when run by a processor, cause the processor to perform steps of the vehicle control method according to various embodiments of the present application described in the above “Exemplary Method” section of the specification.

[0126] The computer readable storage medium can be any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, or apparatus or device, or any suitable combination of the above. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable disc, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0127] The above describes the basic principles of the present application in combination with specific embodiments, but it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and are not limiting, and these advantages, advantages, effects, etc. cannot be considered as the must-have of each embodiment of the present application. In addition, the above specific details are only for the purpose of example and understanding, and are not limiting, and the above details do not limit the present application to the must-use of the above specific details.

[0128] For simple description, each of the foregoing method embodiments is described as a combination of a series of actions, but those skilled in the art shall understand that the present application is not limited to the action sequence described, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art shall understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0129] It should be noted that each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be understood by referring to each other. For device embodiments, since they are basically similar to method embodiments, they are described more simply, and the relevant parts refer to the part of the method embodiment.

[0130] The steps in the method of each embodiment of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the technical features recorded in each embodiment can be replaced or combined.

[0131] The block diagrams of the devices, equipment and systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement and configuration shown in the block diagram must be used. As those skilled in the art will recognize, these devices, equipment and systems can be connected, arranged and configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "include but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0132] It should also be noted that in the devices, equipment and methods of the present application, each component or step can be decomposed and / or recombined. These decompositions and / or recombination shall be regarded as equivalent solutions of the present application.

[0133] The modules or sub-modules described as separate components can or can not be physically separated, and the components as modules or sub-modules can or can not be physical modules or sub-modules, i.e. they can be located in one place, or distributed to multiple network modules or sub-modules. Part or all of the modules or sub-modules can be selected according to actual needs to achieve the purpose of the present embodiment.

[0134] In addition, each functional module or sub-module in each embodiment of the present application can be integrated in one processing module, or each module or sub-module can exist physically alone, or two or more modules or sub-modules can be integrated in one module. The integrated module or sub-module can be realized in the form of hardware or in the form of a software functional module or sub-module.

[0135] Those skilled in the art will further appreciate that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or any combination thereof. To clearly illustrate the interchangeability of hardware and software, various examples have been described generally in terms of their functionality, without limitation to the corresponding description in any particular combination of hardware and software. Those skilled in the art will recognize many modifications and variations of this example that are apparent in light of the above teachings. It is therefore intended that such modifications and variations not depart from the scope of the application.

[0136] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0137] Finally, it needs to be pointed out that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0138] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle control method, characterized in that: include: When the target vehicle is in a heavy-load trailer state, obtaining current power and operating condition information of the target vehicle; The target vehicle includes an engine, a drive motor, and a power battery; the heavy-load trailer state is a state in which the weight of the trailer towed by the target vehicle exceeds a preset weight threshold; If the current battery level is in a low battery range, determining whether the target vehicle is in a high load condition based on the operating condition information; If the operating condition information indicates that the target vehicle is in a high-load operating condition, stopping charging the power battery; Otherwise, the engine is controlled to drive the target vehicle and drive the drive motor to generate electricity to charge the power battery.

2. The method according to claim 1, characterized in that The working condition information includes first slope information of the road where the target vehicle is located; The determining, based on the operating condition information, whether the target vehicle is in a high-load operating condition includes: It is determined whether the target vehicle is in a high-load condition according to the first slope information.

3. The method according to claim 2, characterized in that The determining, based on the first slope information, whether the target vehicle is in a high-load condition includes: Determining whether the target vehicle is in a high-load operating condition based on whether the climbing time of the target vehicle reaches a first time threshold; the climbing time is a duration during which the slope indicated by the first slope information is not less than a preset slope threshold; If the climbing time of the target vehicle reaches the first time threshold, it is determined that the target vehicle is in a high-load condition; Otherwise, it is determined that the target vehicle is not in a high-load condition.

4. The method according to claim 3, characterized in that The low power interval includes a first power interval; the upper limit of the first power interval is a power reserve threshold used to determine whether the power of the drive battery is sufficient to provide power assistance for a long time; The lower limit value of the first power range is a recommended charging threshold value for indicating the lower limit of safe discharge of the power battery; The stopping of charging the power battery includes: The engine and the drive motor are controlled to output power simultaneously to drive the target vehicle.

5. The method according to claim 2, characterized in that The determining, based on the first slope information, whether the target vehicle is in a high-load condition includes: determining whether the target vehicle is in a high-load operating condition based on whether the slope indicated by the first slope information reaches a preset slope threshold; If the slope indicated by the first slope information reaches the preset slope threshold, determining that the target vehicle is in a high-load condition; Otherwise, it is determined that the target vehicle is not in a high-load condition.

6. The method according to claim 5, characterized in that The low power interval is a second power interval; the upper limit of the second power interval is a recommended charging threshold value for indicating the lower limit of safe discharge of the power battery; the lower limit of the second power interval is a mandatory protection threshold value for indicating prohibition of discharge of the power battery; The stopping of charging the power battery includes: The engine is controlled to drive the target vehicle, the drive motor is controlled to be in a shutdown state, and the power battery is controlled to supply power to a low-voltage system of the target vehicle.

7. The method according to claim 1, characterized in that The operating condition information includes the speed information and torque information of the engine, and the gear position information of the transmission connected to the engine; The determining, based on the operating condition information, whether the target vehicle is in a high-load operating condition includes: When the gear indicated by the gear information is not greater than the preset gear, determining whether the target vehicle is in a high-load condition based on whether the torque exceeding time exceeds a second time threshold; The torque exceeding time is a duration during which the torque indicated by the torque information exceeds a first torque threshold corresponding to the speed information.

8. The method according to claim 7, characterized in that The low power interval is a third power interval; the upper limit of the third power interval is a mandatory protection threshold for prohibiting the power battery from discharging; The stopping of charging the power battery includes: The driving motor is controlled to stop, the engine is controlled to drive the target vehicle, the engine is subjected to torque limiting and speed reduction processing, and prompt information for prompting the vehicle to stop and generate electricity is output.

9. The method according to claim 1, characterized in that The method further comprises: In the case where the target vehicle is towing a trailer, obtaining wheel end torque and second slope information of the target vehicle in a target phase; the target phase includes a starting phase or an acceleration phase; Whether the target vehicle is in a heavy-load trailer state is determined based on whether the wheel end torque reaches a second torque threshold corresponding to the second slope information.

10. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the method according to any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 10.

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