Vehicle power control method and device, electronic equipment and vehicle

Abstract

The invention provides a vehicle power control method and device, electronic equipment and a vehicle. The available discharge power of the whole vehicle can be determined according to the current running state of the vehicle and the discharge power of a battery; determining the maximum limit power of the air conditioner according to the available discharge power of the whole vehicle and the air conditioner load, and performing request limitation on the air conditioner request power according to the maximum limit power of the air conditioner; and when a power limit update demand exists, limiting the requested power according to the determined actual maximum power. The request power of the air conditioner system is limited within the range smaller than or equal to the maximum limited power of the air conditioner, and under-voltage of the battery is avoided under the condition that the normal operation of the air conditioner load is met. And when the power limit updating requirement exists, the actual maximum power is determined according to the maximum limit power of the air conditioner, the request power is limited within the range smaller than or equal to the actual maximum power, power overshoot caused by the surge problem of the air conditioner system is avoided during power request limiting, reasonable power distribution is guaranteed, and meanwhile the safety of a battery is protected.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle power control method, device, electronic equipment and vehicle. Background Art

[0002] When the power of the air-conditioning system is limited, the power of the air-conditioning system is limited according to the requested power when the air-conditioning system is running. However, the electric heater (Positive Temperature Coeficient, PTC) and compressor of the air-conditioning system are different from DCDC in that DCDC will always be in working state after the high voltage is applied to the vehicle, while PTC and compressor will not work all the time. When they are turned on, surge phenomenon will occur, causing the distribution of battery power to be disturbed. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a vehicle power control method, device, electronic equipment and vehicle, which are used to reasonably distribute the discharge power of the vehicle.

[0004] Based on the above purpose, the present application provides a vehicle power control method, including:

[0005] Determine the available discharge power of the vehicle according to the current operating state of the vehicle and the battery discharge power;

[0006] Determining a maximum air conditioning power limit according to the available discharge power of the entire vehicle and the air conditioning load, and requesting a limit on the air conditioning requested power according to the maximum air conditioning power limit;

[0007] In response to the current operating state being the driving state, determining whether there is a power limit update requirement according to a heating operating parameter of the electric heater and a compression operating parameter of the compressor;

[0008] In response to the power limit update requirement, the maximum available power is determined based on the battery discharge power and the maximum limited power of the air conditioner; the actual maximum power is determined based on the maximum available power and the maximum allowed power of the motor corresponding to the current driving mode, and the power is requested based on the actual maximum power limit.

[0009] Based on the same inventive concept, the present disclosure also provides a vehicle power control device, comprising:

[0010] The available power determination module is configured to: determine the available discharge power of the whole vehicle according to the current operating state of the vehicle and the battery discharge power;

[0011] The air conditioning power limiting module is configured to: determine the maximum air conditioning power limit according to the available discharge power of the whole vehicle and the air conditioning load, and request limit the air conditioning requested power according to the maximum air conditioning power limit;

[0012] a restriction requirement determination module, configured to: in response to the current operating state being a driving state, determine whether there is a power restriction update requirement according to a heating operating parameter of the electric heater and a compression operating parameter of the compressor;

[0013] The power limit request module is configured to: in response to the existence of the power limit update demand, determine the maximum available power according to the battery discharge power and the maximum limited power of the air conditioner; determine the actual maximum power according to the maximum available power and the maximum allowed power of the motor corresponding to the current driving mode, and request power according to the actual maximum power limit.

[0014] Based on the same inventive concept, the present disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method as described above when executing the computer program.

[0015] Based on the same inventive concept, the present disclosure also provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the method as described above.

[0016] As can be seen from the above, the vehicle power control method, device, electronic device and vehicle provided by the present application can determine the available discharge power of the whole vehicle according to the current operating state of the vehicle and the battery discharge power; determine the maximum limit power of the air conditioner according to the available discharge power of the whole vehicle and the air conditioning load, and request the air conditioning request power according to the maximum limit power of the air conditioner; in response to the current operating state being the driving state, determine whether there is a power limit update demand according to the heating operating parameters of the electric heater and the compression operating parameters of the compressor; in response to the existence of the power limit update demand, determine the maximum available power according to the battery discharge power and the maximum limit power of the air conditioner; determine the actual maximum power according to the maximum available power and the maximum allowable power of the motor corresponding to the current driving mode, and limit the requested power according to the actual maximum power. The available discharge power of the whole vehicle represents the total power that can be used for distribution, the air conditioning load determines the power demand of the air conditioning system, the maximum limit power of the air conditioner is determined according to the available discharge power of the whole vehicle and the air conditioning load, and the requested power of the air conditioning system is limited to a range less than or equal to the maximum limit power of the air conditioning, so as to ensure that the battery will not be under-voltage while satisfying the normal operation of the air conditioning load, and reduce the energy consumption of the air conditioning system. When there is a need to update the power limit, consider the impact of the maximum power limit of the air conditioner on the power distribution of the entire vehicle, determine the actual maximum power based on the maximum power limit of the air conditioner, and limit the requested power to a range less than or equal to the actual maximum power. This ensures that power overshoot caused by surge problems in the air conditioning system is avoided when limiting power requests, ensuring reasonable power distribution while protecting battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A flow chart of a method for controlling vehicle power according to an embodiment of the present application;

[0019] Figure 2 This is a flow chart of an embodiment of the present application for determining the available discharge power of the entire vehicle according to the current operating state of the vehicle and the discharge power of the battery;

[0020] Figure 3 This is a flow chart of determining the maximum power limit of the air conditioner according to the available discharge power of the vehicle and the air conditioner load in an embodiment of the present application;

[0021] Figure 4 A flowchart for determining whether there is a need to update power limits according to an embodiment of the present application;

[0022] Figure 5 A flowchart for replacing the actual maximum power for an embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of the structure of a vehicle power control device according to an embodiment of the present application;

[0024] Figure 7 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] It should be understood herein that any number of elements in the drawings is for illustration rather than limitation, and any naming is only for distinction rather than having any limiting meaning.

[0028] Based on the description of the above background technology, the related technology also has the following situations:

[0029] When distributing power, the generated power cannot be distributed directly. It is necessary to distribute the available power excluding the loss power. Among them, the power consumption of the air-conditioning system is part of the loss power. Generally, the power consumption of the air-conditioning system mainly includes the PTC power consumption and the compressor power consumption. It can be seen that the power consumption of the air-conditioning system will affect the power limit control of the whole vehicle, so it is also necessary to impose certain restrictions on the power consumption of the air-conditioning system. Among them, the PTC power consumption is generally the heating operating power when the PTC is working, and the compressor power consumption is the cooling operating power when the compressor is working. However, after the high pressure is applied to the vehicle, the PTC and the compressor will not work all the time, but will start for a period of time and then shut down for a period of time in an intermittent working mode. When the PTC and the compressor are turned on, a surge phenomenon will occur.

[0030] Electrical surge is a peak value that exceeds the stable value instantly, which includes surge voltage and surge current. Surge mainly refers to the strong pulse generated at the moment when the power is just turned on. The linearity of the circuit itself may be higher than the pulse of the power supply itself; or the power supply or other parts of the circuit are interfered by their own or external sharp pulses.

[0031] Therefore, at the moment when the PTC and the compressor are turned on, the actual working voltage will be very high due to the surge phenomenon, which means that the actual power consumption in the startup process will be larger than that in the working process. However, since the surge phenomenon lasts for a very short time and the sampling period of the power consumption values ​​sent by the PTC and the compressor to the CAN bus is very long, the PTC and the compressor generate a lot of power consumption due to the surge phenomenon and cannot be sent to the CAN bus, which results in the power consumption of the PTC and the compressor received by the VCU not reflecting the actual power consumption situation, which may lead to deviations in the value of the power loss, resulting in inaccurate calculation of the reserved power when the power is limited, and causing the battery to be over-discharged and under-voltage.

[0032] The vehicle power control method, device, electronic device and vehicle provided by the embodiment of the present application can determine the available discharge power of the whole vehicle according to the current running state of the vehicle and the battery discharge power; determine the maximum limit power of the air conditioner according to the available discharge power of the whole vehicle and the air conditioner load, and request the air conditioner request power to be limited according to the maximum limit power of the air conditioner; in response to the current running state being the driving state, determine whether there is a power limit update demand according to the heating operation parameters of the electric heater and the compression operation parameters of the compressor; in response to the existence of the power limit update demand, determine the maximum available power according to the battery discharge power and the maximum limit power of the air conditioner; determine the actual maximum power according to the maximum available power and the maximum allowable power of the motor corresponding to the current driving mode, and limit the request power according to the actual maximum power. The available discharge power of the whole vehicle represents the total power that can be used for distribution, the air conditioner load determines the power demand of the air conditioner system, the maximum limit power of the air conditioner is determined according to the available discharge power of the whole vehicle and the air conditioner load, and the request power of the air conditioner system is limited to a range less than or equal to the maximum limit power of the air conditioner, so as to ensure that the battery will not be under-voltage while satisfying the normal operation of the air conditioner load, and reduce the energy consumption of the air conditioner system. When there is a need to update the power limit, consider the impact of the maximum power limit of the air conditioner on the power distribution of the entire vehicle, determine the actual maximum power based on the maximum power limit of the air conditioner, and limit the requested power to a range less than or equal to the actual maximum power. This ensures that power overshoot caused by surge problems in the air conditioning system is avoided when limiting power requests, ensuring reasonable power distribution while protecting battery safety.

[0033] The vehicle power control method provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0034] In some embodiments, Figure 1 As shown, a vehicle power control method includes:

[0035] Step 101: Determine the available discharge power of the entire vehicle according to the current operating state of the vehicle and the battery discharge power.

[0036] In specific implementation, the current operating state of the vehicle determines the source of power. If the current operating state is the driving state, it means that the power battery is the entire source of discharge power, and the power for power distribution is the battery discharge power of the power battery. If the current operating state is the recovery state, the generator will generate electricity through energy recovery. At this time, there are two sources of power, one is the generator and the other is the battery. When the total consumption is less than or equal to the motor power generation of the generator, the motor power generation is consumed first, and the remaining part is used to charge the battery. When the total consumption is greater than the motor power generation of the generator, the motor power generation is consumed first, and the insufficient part is supplemented by battery discharge. In general, the motor power generation is sufficient for consumption.

[0037] According to the current running state of the vehicle and the battery discharge power, the available discharge power of the vehicle can be expressed as:

[0038] The available discharge power of the whole vehicle = battery discharge power - actual power consumption of DCDC - high-voltage bus loss power + motor power generation power.

[0039] Among them, in the driving state, the generator does not run and does not generate motor power. At this time, the motor power in the calculation formula for the available discharge power of the whole vehicle = 0kw. In the recovery state, the generator starts to run and generates a certain amount of motor power. At this time, the motor power = the absolute value of the recovery power generated by the generator. The same calculation formula can be used to calculate the available discharge power of the whole vehicle under different operating states to ensure the efficiency and simplicity of the calculation process of the whole vehicle. The difference in calculation under different operating states is the motor power. By taking different values ​​of the motor power under different operating states, the same calculation formula can be used for power calculation to improve calculation efficiency.

[0040] From the calculation formula of the available discharge power of the whole vehicle, we can see that the meaning of the available discharge power of the whole vehicle power system is: no matter what state the power system of the whole vehicle is in (driving state or recovery state), only the remaining discharge power of the power system after deducting the loss is calculated. Because for PTC and compressor, no matter what state the power system is in, the whole vehicle is in a state of power consumption and energy consumption. Therefore, there is no need to distinguish the state of the power system of the whole vehicle for PTC and compressor. They are all part of the loss power and will consume the available discharge power of the whole vehicle. Therefore, it is necessary to use the available discharge power of the whole vehicle to limit the PTC and compressor in the air-conditioning system.

[0041] Step 102: Determine the maximum air conditioning power limit according to the available discharge power of the entire vehicle and the air conditioning load, and request limit the air conditioning power request according to the maximum air conditioning power limit.

[0042] In specific implementation, the available discharge power of the whole vehicle is the discharge power that can be used after deducting the current power loss, and the air conditioning load determines the size of the power consumption.

[0043] Exemplarily, the available discharge power of the whole vehicle can be divided into three levels, and the levels can be divided according to the current power level. If the current power level is less than or equal to the lower boundary power level, it means that the power level is low, there is a need for energy saving, and a more stringent air-conditioning power limit is required. In this case, the low power level is determined as the target power level. If the current power level is greater than the upper boundary power level, it means that the power level is high, the battery has sufficient discharge capacity, and a more relaxed air-conditioning power limit can be made. In this case, the high power level is determined as the target power level. If the current power level is less than or equal to the upper boundary power level and greater than the lower boundary power level, it means that the battery power is neither high nor low. In this case, the middle power level is determined as the target power level.

[0044] Exemplarily, the air-conditioning load can be divided into five load types. The first load type is a single refrigeration load in which only the compressor performs cooling work alone; the second load type is a single heating load in which only the PTC performs heating work alone; the third type is a combined refrigeration load when the defrost and defog functions are turned on and the compressor is activated for cooling work; the fourth type is a combined heating load when the defrost and defog functions are turned on and the PTC is activated for heating work; the fifth type is a comprehensive temperature control load when the defrost and defog functions are turned on, and the compressor is activated for cooling work while the PTC is activated for heating work.

[0045] Among them, the working power of a single cooling load is less than the working power of a single heating load, less than the working power of a combined cooling load, less than the working power of a combined heating load, and less than the working power of a comprehensive temperature control load. Assume that the hierarchical power set corresponding to a single cooling load is (U1, U2, U3); the hierarchical power set corresponding to a single heating load is (V1, V2, V3); the hierarchical power set corresponding to a combined cooling load is (W1, W2, W3); the hierarchical power set corresponding to a combined heating load is (X1, X2, X3); and the hierarchical power set corresponding to a comprehensive temperature control load is (Y1, Y2, Y3). Then there exists U1<V1<W1<X1<Y1; U2<V2<W2<X2<Y2; U3<V3<W3<X3<Y3.

[0046] Among them, the hierarchical power set can also include more hierarchical powers. The more hierarchical powers included, the more levels the available discharge power of the whole vehicle can be divided into, and the more accurate the maximum limit power of the output air conditioner. However, the amount of calculation will be greater and the response speed will be lower. Therefore, it is necessary to comprehensively consider the amount of calculation and accuracy to determine the number of hierarchical divisions. The number of hierarchical divisions is not limited here, and only the division into three levels is used as an example for explanation.

[0047] Then, according to the target power level of the available discharge power of the whole vehicle, the output maximum limit power of the air conditioner is determined in the level power set corresponding to the air-conditioning load, where *1 in different level power sets represents the output value of the maximum limit power of the air conditioner corresponding to the low power level; *2 in different level power sets represents the output value of the maximum limit power of the air conditioner corresponding to the middle power level; *3 in different level power sets represents the output value of the maximum limit power of the air conditioner corresponding to the high power level.

[0048] By dividing the available discharge power of the whole vehicle into levels, the available discharge power of the whole vehicle power system is linked to the maximum limit power P of the air conditioner. That is to say, if the value of the available discharge power of the whole vehicle power system is large, then the corresponding value of the maximum limit power P of the air conditioner is also large. Limiting the air conditioning system according to the air conditioning request power can ensure that there is sufficient power when the vehicle is driven and realize the reasonable distribution of power. By limiting the air conditioning request power through hierarchical restrictions, different limit powers are ensured under different power levels, ensuring that the vehicle drive has sufficient power while ensuring the effect of vehicle temperature control, and improving the comfort inside the vehicle.

[0049] Step 103 : In response to the current operating state being the driving state, determining whether there is a power limit update requirement according to the heating operating parameters of the electric heater and the compression operating parameters of the compressor.

[0050] In specific implementation, it can be seen from the calculation formula of the available discharge power of the whole vehicle that the meaning of the available discharge power of the whole vehicle power system is: no matter what state the power system of the whole vehicle is in, only the remaining discharge power of the power system after deducting the loss is calculated, because for PTC and compressor, no matter what state the power system is in, the air conditioning request power is in a state of power consumption and energy consumption for the whole vehicle, so the surge phenomenon when PTC and compressor are started will only lead to an increase in power loss. In the recovery state, the purpose of power limitation is to avoid overcharging the battery. Increasing the power loss will only reduce the charging power of the battery and will not lead to a more serious risk of overcharging. Therefore, when limiting the requested power in the recovery state, there is no need to consider the impact of the surge phenomenon of the air conditioning system.

[0051] When the current operating state is the driving state, the purpose of power limitation is to prevent the battery from over-discharging and causing undervoltage. Increasing the power loss will only increase the burden on the battery and lead to a more serious risk of undervoltage. Therefore, when limiting the requested power in the driving state, the impact of the air-conditioning system surge phenomenon needs to be considered. At this time, it is necessary to determine whether there is a need to update the power limit. The limit on the requested power during normal time is based on the PTC power consumption when the PTC is working and the compressor power consumption when the compressor is working. The PTC power consumption and the compressor power consumption during work are both less than the surge power during surge. Therefore, when a surge occurs, the power loss increases, but the request power is still limited based on the PTC power consumption and the compressor power consumption during work, resulting in the battery needing to output an additional part of the power generated by the surge, thereby increasing the risk of battery undervoltage.

[0052] Therefore, it is necessary to determine whether there is a need to update the power limit based on the heating operating parameters of the electric heater and the compression operating parameters of the compressor, and determine whether there is a greater risk of battery undervoltage. If it can be determined based on the heating operating parameters of the electric heater that the electric heater is in the period of time when it is turned on, it means that there is a surge phenomenon, there is a greater risk of battery undervoltage, and it is determined that there is a need to update the power limit. If it can be determined based on the compression operating parameters of the compressor that the compressor is in the period of time when it is turned on, it means that there is a surge phenomenon, there is a greater risk of battery undervoltage, and it is determined that there is a need to update the power limit.

[0053] Step 104: In response to a power limit update request, determine the maximum available power based on the battery discharge power and the maximum air conditioner power limit; determine the actual maximum power based on the maximum available power and the maximum allowable power of the motor corresponding to the current driving mode, and request power based on the actual maximum power limit.

[0054] In specific implementation, determining the actual maximum power is divided into two steps:

[0055] Step 1: Determine the available driving power of the motor according to the battery discharge power and the maximum limited power of the air conditioner, and distribute the available driving power of the motor according to the current driving mode of the vehicle to obtain the available distributed power.

[0056] Step 2: Determine the target reserved power based on the available allocated power and the current motor speed, and determine the difference between the available allocated power and the target reserved power as the maximum available power, and determine the actual maximum power based on the maximum available power and the maximum allowed power of the motor corresponding to the current driving mode to limit the requested power according to the actual maximum power.

[0057] For the first step, in the driving state, the battery needs to generate electricity to drive the vehicle, and the battery is discharged. The power value generated by the discharge process that can be used by the whole vehicle is the battery discharge power. However, there is a certain loss in the battery discharge power during the transmission process. The actual available driving power of the whole vehicle that can be used to drive the vehicle in the battery discharge power is the difference between the battery discharge power and the transmission loss, that is, the available driving power of the whole vehicle = battery discharge power - loss power.

[0058] Among them, without considering the impact of air-conditioning system surge, when there is no need to update the power limit, the power loss includes the actual power loss of DCDC, the power loss of the high-voltage bus, the power loss of PTC, and the power loss of the compressor. Therefore, without considering the impact of air-conditioning system surge, the power loss = actual power loss of DCDC + power loss of high-voltage bus + power loss of PTC + power loss of compressor, then the available driving power of the whole vehicle = battery discharge power - actual power consumption of DCDC - power consumption of high-voltage bus - power consumption of PTC - power consumption of compressor.

[0059] Consider the impact of surge on the air-conditioning system, and when there is a surge, the power loss needs to be updated. When a surge occurs, the PTC power consumption and the compressor power consumption can be equal to 0. Therefore, when there is a need to update the power limit, the power loss calculation formula is updated to: Power loss = DCDC actual power loss + high-voltage bus power loss + PTC power loss + compressor power loss + air conditioning maximum power limit.

[0060] From the perspective of the motor, the available driving power of the whole vehicle is the power at the high-voltage end. There is a conversion relationship between the mechanical end and the high-voltage end power and the motor efficiency, so the available driving power of the whole vehicle at the high-voltage end needs to be converted to the mechanical end. Since the motor high-voltage end power × motor driving efficiency = mechanical end power, the available driving power of the motor = available driving power of the whole vehicle × motor driving efficiency.

[0061] After determining the available driving power of the motor, it is necessary to continue to distribute the available driving power of the motor according to the current driving mode of the vehicle to obtain the available distributed power. The electric four-wheel drive vehicle is provided with two front and rear electric drive axles, wherein the electric drive axle with a disengagement mechanism is used as an auxiliary drive axle, and the electric drive axle without a disengagement mechanism is used as the main drive axle. When the disengagement mechanism is in the disengaged state, the driving mode is the dual-drive mode. In the dual-drive mode, the auxiliary drive axle does not participate in the driving of the whole vehicle, and there is no need to distribute power to the auxiliary drive axle. All the available driving power of the motor can be distributed to the main drive axle.

[0062] When the disengagement mechanism is in the engaged state, the driving mode is the four-wheel drive mode. In the four-wheel drive mode, the auxiliary drive axle participates in the vehicle driving, and power needs to be distributed to the main drive axle and the auxiliary drive axle at the same time. The distribution method is to determine the product of the distribution ratio and the available drive power of the motor as the available power of the main drive axle; and determine the difference between the available drive power of the motor and the available power of the main drive axle as the available power of the auxiliary drive axle.

[0063] If the operating state is the driving state, the distribution method of the motor's available driving power is: motor's available driving power × distribution ratio = main drive axle's available driving power, motor's available driving power × (1-distribution ratio) = motor's available driving power - main drive axle's available driving power = auxiliary drive axle's available driving power.

[0064] Therefore, the available driving power of the main drive axle = the available driving power of the whole vehicle × the distribution ratio × the driving efficiency of the main drive motor;

[0065] The available driving power of the auxiliary drive axle = the available driving power of the whole vehicle × (1-distribution ratio) × the driving efficiency of the auxiliary drive motor.

[0066] For the second step, the reserved power, motor speed and available allocated power constitute three-dimensional relationship data. After determining the three-dimensional relationship data, the corresponding target reserved power is obtained by searching in the three-dimensional relationship data according to the current motor speed and the available allocated power. The target reserved power represents the additional power range reserved when making a power request, which is used to reduce the upper limit request value of the requested power. The reserved power can avoid the risk of overvoltage or undervoltage caused by short-term overshoot.

[0067] Maximum available power = available allocated power - target reserved power. The maximum available power is the upper limit of the requested power under the battery performance limit. The requested power cannot exceed the maximum available power to avoid the risk of undervoltage caused by short-term overshoot. However, when making a power request, the motor performance limit must also be considered. The maximum allowable power of the motor corresponding to the current drive mode is used to implement the motor performance limit. The maximum allowable power is the maximum output power allowed by the motor when it is not overloaded, so the maximum allowable power is the upper limit of the requested power under the motor performance limit.

[0068] Finally, the minimum value of the maximum available power and the maximum allowable power is determined as the actual maximum power, that is, the actual maximum power = min (maximum available power, maximum allowable power). The minimum value of the two types of limitations is used as the final actual limitation of the requested torque. Then, limiting the requested power according to the actual maximum power can ensure that the requested power converted from the requested torque will not cause the battery to be in an undervoltage state, reducing damage to the battery, and will not cause the motor to overload, reducing damage to the motor.

[0069] For vehicles with four-wheel drive function, the maximum allowable power in the driving state includes the maximum driving power of the main drive axle and the maximum driving power of the auxiliary drive axle. Correspondingly, the actual maximum power includes the maximum main drive power and the maximum auxiliary drive power.

[0070] Wherein, maximum main drive power = min (main drive axle available drive power, main drive axle maximum drive power);

[0071] Maximum auxiliary drive power = min (available drive power of auxiliary drive axle, maximum drive power of auxiliary drive axle).

[0072] In the driving state, the battery performance limitation is determined by the battery discharge power to obtain the available driving power of the motor. The available driving power of the motor is allocated in different driving modes to determine the available allocated power of each motor. The available allocated power is reserved through the corresponding target reserved power to avoid the risk of battery undervoltage. The motor performance limitation is determined by the maximum allowable power of the motor, and then the actual maximum power is determined according to the maximum available power and the maximum allowable power. The actual maximum power is the maximum requested power allowed under the motor performance limitation and the battery performance limitation. Requesting power according to the actual maximum power limit can reduce damage to the battery and motor, and realizes the protection of the battery and motor at the power end. Further protection of the torque end needs to be continued.

[0073] When calculating the power loss, the maximum power limit of the air conditioner is the maximum power value allowed to be requested by the air conditioning system. Calculating the air conditioning system's loss using the maximum power limit of the air conditioner + PTC loss power + compressor loss power can eliminate the air conditioning system's request for additional power to the greatest extent possible, ensuring that sufficient energy is reserved for vehicle driving. Since the maximum power limit of the air conditioner has already limited the air conditioning system, it is ensured that the requested power during a surge will not exceed the maximum power limit of the air conditioner, ensuring that there will be no impact on the final calculated value of the actual maximum power. Limiting the requested power to the actual maximum power can ensure that the battery will not be under-voltage during a surge, thereby ensuring the safety of the battery, while limiting the air conditioning system's requests and reducing energy consumption.

[0074] In summary, the maximum power limit of the air conditioner is determined based on the available discharge power of the vehicle and the air conditioner load, and the requested power of the air conditioner system is limited to a range less than or equal to the maximum power limit of the air conditioner. This ensures that the battery will not be under-voltage while meeting the normal operation of the air conditioner load, and reduces the energy consumption of the air conditioner system. When there is a need to update the power limit, the impact of the maximum power limit of the air conditioner on the power distribution of the vehicle is considered, and the actual maximum power is determined based on the maximum power limit of the air conditioner. The requested power is limited to a range less than or equal to the actual maximum power, ensuring that the power overshoot caused by the surge problem of the air conditioner system is avoided when limiting the power request, ensuring reasonable power distribution while protecting the safety of the battery.

[0075] In some embodiments, Figure 2 As shown, the available discharge power of the vehicle is determined according to the current operating state of the vehicle and the battery discharge power, including:

[0076] Step 201: In response to the current operating state being the driving state, the difference between the battery discharge power and the current power loss is determined as the available discharge power of the entire vehicle.

[0077] In specific implementation, if the current operating state is the driving state, the generator is not running, and the motor power generation will not be generated. The battery is the only discharge source, and the vehicle discharge power is the battery discharge power. In the process of transmitting the battery discharge power to the air-conditioning system, a part of the current loss power will be generated, among which the current loss power = DCDC actual power consumption + high-voltage bus loss power. Since the battery discharge power minus the current loss power is the current available discharge power of the whole vehicle, so, in the driving state, the difference between the battery discharge power and the current loss power is the available discharge power of the whole vehicle. Then the available discharge power of the whole vehicle = battery discharge power current loss power - = battery discharge power - DCDC actual power consumption - high-voltage bus loss power. Since the motor power generation in the driving state = 0kw. Then the calculation process can be updated to the available discharge power of the whole vehicle = battery discharge power - DCDC actual power consumption - high-voltage bus loss power + motor power generation (0kw).

[0078] Step 202: In response to the current operating state being a recovery state, the sum of the motor power generation of the motor and the battery discharge power is determined as the total available discharge power, and the difference between the total available discharge power and the current loss power is determined as the vehicle available discharge power.

[0079] In specific implementation, if the current operating state is the recovery state, in the recovery state, the generator starts to run and generates a certain amount of motor power, that is, the motor power = the absolute value of the recovery power generated by the generator. At this time, both the generator and the battery can discharge and output, so the total available discharge power that can be used is the sum of the motor power and the battery discharge power of the motor, that is, the total available discharge power = motor power + battery discharge power. The current power loss during power transmission = actual power consumption of DCDC + high-voltage bus power loss, then the available discharge power of the whole vehicle after deducting the loss = total available discharge power - current power loss = battery discharge power - actual power consumption of DCDC - high-voltage bus power loss + motor power (absolute value of the recovery power generated by the generator).

[0080] The same calculation formula can be used to calculate the available discharge power of the whole vehicle under different operating conditions, ensuring the efficiency and simplicity of the calculation process of the whole vehicle. The difference in calculation under different operating conditions is the motor power generation. By taking different values ​​of the motor power generation under different operating conditions, the same calculation formula can be used for power calculation, thereby improving calculation efficiency.

[0081] In some embodiments, Figure 3 As shown in the figure, the maximum air conditioning power limit is determined based on the available discharge power of the vehicle and the air conditioning load, including:

[0082] Step 301: Determine the target power level of the available discharge power of the entire vehicle according to the current power level.

[0083] In some embodiments, step 301 includes:

[0084] Step 3011: Determine the upper boundary power and the lower boundary power of the power level.

[0085] In specific implementation, illustratively, the upper boundary power is the power value for judging whether the battery is in a low power state, and the upper boundary power is the power value for judging whether the battery is fully charged. illustratively, the upper boundary power is 80%, and the lower boundary power is 20%. For a battery with better performance, the upper boundary power can be 70%, and the lower boundary power is 15%, because for a battery with better performance, although the power is lower, the discharge capacity may be higher, because 1% of the power of a battery with better performance may be equivalent to 1.2% of the power of a battery with poor performance.

[0086] Step 3012: In response to the current power level being less than or equal to the lower boundary power level, determine the low power level as the target power level.

[0087] In specific implementation, if the current power level is ≤20%, it means that the battery is already in a low-power state. The battery power is insufficient, and the power usage of the entire vehicle needs to be prioritized. At this time, it is necessary to more strictly limit the power consumption of the air-conditioning system, that is, a smaller maximum air-conditioning limit power is required. Therefore, the low power level is determined as the target power level to reduce the maximum consumption capacity of the air-conditioning system. While reducing energy consumption, it is ensured that it will not affect the normal driving of the vehicle.

[0088] Step 3013: In response to the current power level being greater than the upper boundary power level, a high power level is determined as the target power level.

[0089] During specific implementation, if the current power level is greater than 80%, it means that the battery is already in a high power state and has sufficient power. While ensuring the driving of the entire vehicle, it is necessary to further consider the comfort of the interior of the vehicle. At this time, the limit on the power consumption of the air-conditioning system can be relaxed, that is, a larger maximum air-conditioning power limit can be used to ensure rapid adjustment of the temperature inside the vehicle. Therefore, the high power level is determined as the target power level to achieve an in-vehicle ambient temperature that satisfies the user, while ensuring the driving of the vehicle and the comfort of the in-vehicle environment.

[0090] Step 3014: In response to the current power level being less than or equal to the upper boundary power level and greater than the lower boundary power level, the middle power level is determined as the target power level.

[0091] In specific implementation, if 20%>current power ≤80%, it means that the battery power is neither high nor low, and is at a normal level. At this time, the distance to the low battery power is close, and only a part of the air-conditioning system needs to be restricted to avoid rapid consumption of battery power and reduce energy consumption. Therefore, it is necessary to determine the middle power level as the target power level to ensure that the battery power will not be consumed quickly while avoiding affecting the normal driving of the vehicle.

[0092] Step 302: Determine the maximum power limit of the air conditioner according to the target power level and the target load type of the air conditioner load.

[0093] In some embodiments, step 302 includes:

[0094] Step 3021: Determine a hierarchical power set corresponding to the target load type; wherein the power set includes a low-level limit power, a middle-level limit power and a high-level limit power in increasing order.

[0095] In a specific implementation, exemplarily, the load types of the air-conditioning load include a single cooling load, a single heating load, a combined cooling load, a combined heating load and a comprehensive temperature control load.

[0096] Among them, the working power of a single cooling load is less than the working power of a single heating load and less than the working power of a combined cooling load and less than the working power of a combined heating load and less than the working power of a comprehensive temperature control load. If the target load type is a single cooling load, the corresponding hierarchical power set is (U1, U2, U3); if the target load type is a single heating load, the corresponding hierarchical power set is (V1, V2, V3); if the target load type is a combined cooling load, the corresponding hierarchical power set is (W1, W2, W3); if the target load type is a combined heating load, the corresponding hierarchical power set is (X1, X2, X3); if the target load type is a comprehensive temperature control load, the corresponding hierarchical power set is (Y1, Y2, Y3). Then there exists U1<V1<W1<X1<Y1; U2<V2<W2<X2<Y2; U3<V3<W3<X3<Y3.

[0097] Among them, (U1<U2<U3); (V1<V2<V3); (W1<W2<W3); (X1<X2<X3); (Y1<Y2<Y3). In the above, *1 indicates low-level power restriction, *2 indicates middle-level power restriction, and *3 indicates high-level power restriction. Among them, *∈(U,V,WX,Y).

[0098] Step 3022: In response to the target power level being a low power level, determining the low level limit power as the maximum limit power of the air conditioner.

[0099] In specific implementation, if the target power level is a low power level, the *1 in the level power set corresponding to the target load type is determined as the maximum limit power of the air conditioner, minimizing the maximum limit power of the air conditioner, reducing the maximum power consumption value of the air conditioning system, ensuring that more battery power can be used for vehicle driving, and realizing reasonable power distribution.

[0100] Step 3023: In response to the target power level being the middle power level, determining the middle level limit power as the maximum limit power of the air conditioner.

[0101] In specific implementation, if the target power level is the medium power level, the *2 in the level power set corresponding to the target load type will be determined as the maximum limited power of the air conditioner. While reducing the power consumption rate of the air-conditioning system, it can ensure that the vehicle temperature can be adjusted faster, realize reasonable power distribution, and take into account both comfort and drivability.

[0102] Step 3024: In response to the target power level being a high power level, determining the high-level limit power as the maximum limit power of the air conditioner.

[0103] In specific implementation, if the target power level is a high power level, *3 in the level power set corresponding to the target load type will be determined as the maximum limit power of the air conditioner, maximizing the maximum limit power of the air conditioner, allocating greater power to the air conditioning system, ensuring that the vehicle temperature can be adjusted quickly, bringing a better driving experience to the user, and maximizing the temperature control efficiency of the vehicle without affecting the vehicle drive, thereby improving the user's comfort.

[0104] The air conditioning power request is limited through hierarchical restrictions to ensure different power limits under different power levels, ensuring that the vehicle drive has sufficient power while ensuring the vehicle temperature control effect and improving the comfort inside the vehicle.

[0105] In some embodiments, Figure 4 As shown, determining whether there is a power limit update requirement according to the heating operation parameters of the electric heater and the compression operation parameters of the compressor includes:

[0106] Step 401: In response to the electric heater state in the heating operation parameter being in the set state, and the heating operation parameter containing a rising edge signal for starting the electric heater, determining that there is a heating power limitation requirement.

[0107] During specific implementation, if the electric heater status in the heating operation parameters is in the set state, it is determined that the electric heater can be started. If there is a rising edge signal for starting the electric heater in the heating operation parameters, it means that the electric heater is in the startup process and there is a surge phenomenon. The impact of the surge on the power loss needs to be considered, and the power loss needs to be updated to determine whether there is a heating power limit requirement.

[0108] Step 402: In response to the compressor state in the compression operation parameter being in the set state and the presence of a rising edge signal for starting the compressor in the compression operation parameter, it is determined that there is a refrigeration power limitation requirement.

[0109] During specific implementation, if the compressor status in the compression operation parameters is in the set state, it is determined that the compressor can be started. If there is a rising edge signal for starting the compressor in the compression operation parameters, it means that the compressor is in the process of starting and there is a surge phenomenon. The impact of the surge on the power loss needs to be considered, and the power loss needs to be updated to determine whether there is a heating power limit requirement.

[0110] Step 403: In response to the presence of a heating power limitation requirement and / or the presence of a cooling power limitation requirement, determining that there is a power limitation update requirement.

[0111] In specific implementation, no matter the electric heater or the compressor is performing the startup process, there will be a surge phenomenon, so as long as there is one of the heating power limitation demand and the cooling power limitation demand, it can be determined that there is a power limitation update demand.

[0112] Step 404: In response to the absence of a heating power limit requirement and the absence of a cooling power limit requirement, determining that there is no power limit update requirement.

[0113] During specific implementation, when there is no demand for heating power limitation and no demand for cooling power limitation, it means that neither the compressor nor the electric heater is in the startup stage, there is no high power demand caused by surge phenomenon, and there will be no impact on the power loss, and it is determined that there is no need to update the power limit.

[0114] In some embodiments, Figure 5 As shown, after determining the actual maximum power, the vehicle power control method further includes:

[0115] Step 501: Determine the duration of limiting the actual maximum power.

[0116] In specific implementation, since the surge phenomenon only exists in a short period of time when the compressor or electric heater is started, it is not necessary to update the power loss when the compressor or electric heater is turned off or operating normally. Therefore, it is necessary to determine the duration of the limit on the requested power limit based on the actual maximum power after the updated power loss, in order to determine whether the surge phenomenon has ended and switch to calculate the actual maximum power based on the unupdated power loss.

[0117] Step 502: In response to the restriction duration being greater than or equal to a preset restriction duration threshold, the actual maximum power is replaced with the initial actual maximum power, and the requested power is restricted according to the initial actual maximum power.

[0118] In specific implementation, if the duration of the restriction is greater than or equal to the preset restriction duration threshold, it means that the duration of the surge has ended. When limiting the requested power, there is no need to consider the additional power consumption caused by the surge phenomenon. The actual maximum power is replaced by the initial actual maximum power, and the requested power is limited according to the initial actual maximum power. Among them, the initial actual maximum power is the power value calculated when the loss power = DCDC actual loss power + high-voltage bus loss power + PTC loss power + compressor loss power. Replacing the actual maximum power with the initial actual maximum power increases the upper limit of the power driving the vehicle, ensures the reasonable allocation of power restrictions, and avoids excessive power restrictions. By increasing the maximum limit power of the air conditioner, the vehicle power system can be saved, while avoiding the risk of power overshoot caused by surge phenomena when the PTC and compressor are turned on, thereby avoiding excessive discharge and undervoltage of the battery and reducing the risk of battery damage.

[0119] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0120] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0121] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a vehicle power control device.

[0122] refer to Figure 6 , the vehicle power control device comprises:

[0123] The available power determination module 10 is configured to: determine the available discharge power of the whole vehicle according to the current operating state of the vehicle and the battery discharge power;

[0124] The air conditioning power limiting module 20 is configured to: determine the maximum air conditioning power limit according to the available discharge power of the vehicle and the air conditioning load, and request limit the air conditioning request power according to the maximum air conditioning power limit;

[0125] The restriction requirement determination module 30 is configured to: in response to the current operating state being the driving state, determine whether there is a power restriction update requirement according to the heating operating parameters of the electric heater and the compression operating parameters of the compressor;

[0126] The requested power limit module 40 is configured to: in response to the existence of a power limit update demand, determine the maximum available power based on the battery discharge power and the maximum limited power of the air conditioner; determine the actual maximum power based on the maximum available power and the maximum allowed power of the motor corresponding to the current driving mode, and request power based on the actual maximum power limit.

[0127] For the convenience of description, the above device is described in terms of functions divided into various modules. Of course, when implementing the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0128] The device of the above embodiment is used to implement the corresponding vehicle power control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0129] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the vehicle power control method described in any of the above embodiments is implemented.

[0130] Figure 7 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0131] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0132] The memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0133] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0134] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0135] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0136] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0137] The electronic device of the above embodiment is used to implement the corresponding vehicle power control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0138] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle power control method described in any of the above embodiments.

[0139] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0140] The computer instructions stored in the storage medium of the above embodiments are used to enable the computer to execute the vehicle power control method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0141] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides a vehicle, including the electronic device or vehicle power control device of the above-mentioned embodiments, and the vehicle power control method described in any of the above-mentioned embodiments is executed through the electronic device or vehicle power control device of the above-mentioned embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0142] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0143] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0144] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0145] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0146] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0147] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0148] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0149] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A method for controlling vehicle power, characterized in that: include: Determine the available discharge power of the vehicle according to the current operating state of the vehicle and the battery discharge power; Determining a maximum air conditioning power limit according to the available discharge power of the entire vehicle and the air conditioning load, and requesting a limit on the air conditioning requested power according to the maximum air conditioning power limit; In response to the current operating state being the driving state, determining whether there is a power limit update requirement according to a heating operating parameter of the electric heater and a compression operating parameter of the compressor; In response to the power limit update requirement, determining a maximum available power according to the battery discharge power and a maximum limited power of the air conditioner; An actual maximum power is determined according to the maximum available power and a maximum allowable power of the motor corresponding to the current driving mode, and the requested power is limited according to the actual maximum power.

2. The vehicle power control method according to claim 1, characterized in that: The method of determining the available discharge power of the vehicle according to the current running state of the vehicle and the discharge power of the battery includes: In response to the current operating state being a driving state, determining a difference between the battery discharge power and the current power loss as the available discharge power of the entire vehicle; In response to the current operating state being a recovery state, the sum of the motor power generation of the motor and the battery discharge power is determined as the total available discharge power, and the difference between the total available discharge power and the current loss power is determined as the vehicle available discharge power.

3. The vehicle power control method according to claim 1, characterized in that: The determining of the maximum air conditioning power limit according to the available discharge power of the vehicle and the air conditioning load includes: Determining a target power level of the available discharge power of the whole vehicle according to the current power; The maximum limited power of the air conditioner is determined according to the target power level and the target load type of the air conditioner load.

4. The vehicle power control method according to claim 3, characterized in that: The step of determining the target power level of the available discharge power of the vehicle according to the current power includes: Determine the upper and lower boundary power of the power level; In response to the current power level being less than or equal to the lower boundary power level, determining a low power level as the target power level; In response to the current power level being greater than the upper boundary power level, determining a high power level as the target power level; In response to the current power level being less than or equal to the upper boundary power level and greater than the lower boundary power level, an intermediate power level is determined as the target power level.

5. The vehicle power control method according to claim 3, characterized in that: The determining the maximum limited power of the air conditioner according to the target power level and the target load type of the air conditioner load includes: Determine a hierarchical power set corresponding to the target load type; wherein the power set includes a low-level limit power, a middle-level limit power, and a high-level limit power in increasing order; In response to the target power level being a low power level, determining the low level limit power as the maximum limit power of the air conditioner; In response to the target power level being an intermediate power level, determining the intermediate level limit power as the maximum limit power of the air conditioner; In response to the target power level being a high power level, the high-level limit power is determined as the maximum limit power of the air conditioner.

6. The vehicle power control method according to claim 1, characterized in that: The determining whether there is a power limit update requirement according to the heating operation parameters of the electric heater and the compression operation parameters of the compressor includes: In response to the electric heater state in the heating operation parameter being in a set state, and the heating operation parameter containing a rising edge signal for starting the electric heater, determining that there is a heating power limitation requirement; In response to the compressor state in the compression operation parameter being in a set state and the compression operation parameter containing a rising edge signal for starting the compressor, determining that there is a refrigeration power limitation requirement; In response to the presence of the heating power limit requirement and / or the presence of the cooling power limit requirement, determining that there is a power limit update requirement; In response to the absence of the heating power limit demand and the absence of the cooling power limit demand, it is determined that there is no power limit update demand.

7. The vehicle power control method according to claim 1, characterized in that: After determining the actual maximum power, the method further includes: Determining a duration of limiting the actual maximum power; In response to the restriction duration being greater than or equal to a preset restriction duration threshold, the actual maximum power is replaced with an initial actual maximum power, and the requested power is limited according to the initial actual maximum power.

8. A vehicle power control device, characterized in that: include: The available power determination module is configured to: determine the available discharge power of the whole vehicle according to the current operating state of the vehicle and the battery discharge power; The air conditioning power limiting module is configured to: determine the maximum air conditioning power limit according to the available discharge power of the whole vehicle and the air conditioning load, and request limit the air conditioning requested power according to the maximum air conditioning power limit; a restriction requirement determination module, configured to: in response to the current operating state being a driving state, determine whether there is a power restriction update requirement according to a heating operating parameter of the electric heater and a compression operating parameter of the compressor; The power limit request module is configured to: in response to the existence of the power limit update demand, determine the maximum available power according to the battery discharge power and the maximum limited power of the air conditioner; determine the actual maximum power according to the maximum available power and the maximum allowed power of the motor corresponding to the current driving mode, and request power according to the actual maximum power limit.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 8 is implemented.

10. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 9.

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