Parameter matching method, device and equipment of hybrid power system and vehicle

Abstract

The application discloses a parameter matching method, device and equipment of a hybrid power system and a vehicle. The hybrid power system at least comprises an engine, a first motor, a second motor, a power battery and a power coupling mechanism. The method comprises the following steps: determining the rated power of the second motor based on a braking energy recovery working condition; determining the maximum demand driving power of the vehicle based on a limit climbing working condition; determining the minimum driving power of the engine in a driving mode according to the rated power of the second motor and the maximum demand driving power of the vehicle; obtaining the average demand power required by the vehicle running based on a development process; and determining the rated power of the first motor and the rated power of the engine according to the average demand power. The optimal vehicle configuration is obtained by obtaining different parameters, so that the vehicle performance is ensured.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a parameter matching method, apparatus, device, and vehicle for a hybrid power system. Background Technology

[0002] With declining global oil production and increased environmental protection efforts by governments, the automotive industry, after previously launching pure electric vehicles, is now addressing the range anxiety of pure electric vehicles by introducing hybrid electric vehicles. Hybrid electric vehicle technology is developing rapidly. When automakers develop hybrid models, parameter matching is a crucial issue. The efficiency of parameter matching calculations directly affects vehicle performance. Therefore, designing an overall structure and parameter matching method for hybrid electric vehicles is essential. Summary of the Invention

[0003] This invention provides a parameter matching method, apparatus, device, and vehicle for a hybrid power system to obtain the optimal vehicle configuration and ensure vehicle performance.

[0004] In a first aspect, the present invention provides a parameter matching method for a hybrid power system, the hybrid power system including at least an engine, a first motor, a second motor, a power battery, and a power coupling mechanism, the method comprising:

[0005] The rated power of the second motor is determined based on the braking energy recovery operating condition;

[0006] Determine the maximum required drive power for the entire vehicle based on extreme climbing conditions;

[0007] The minimum drive power of the engine in drive mode is determined based on the rated power of the second motor and the maximum required drive power of the vehicle.

[0008] The average power required for vehicle operation is obtained based on the development process.

[0009] The rated power of the first motor and the rated power of the engine are determined based on the average power demand.

[0010] Optionally, determining the rated power of the second motor includes:

[0011] Obtain the maximum regenerative braking energy under a preset road spectrum;

[0012] The first vehicle fuel saving rate is determined based on the maximum regenerative braking energy.

[0013] The first total cost is determined based on the first vehicle fuel saving rate, the operating cost within the first preset usage period, the vehicle purchase cost, and the estimated vehicle residual value.

[0014] The rated power of the second motor is determined based on the first total cost.

[0015] Optionally, after determining the rated power of the second motor, the method further includes:

[0016] The battery capacity of the power battery is determined based on the maximum regenerative braking energy.

[0017] Optionally, the minimum drive power of the engine in drive mode is determined based on the rated power of the second motor and the maximum required drive power of the vehicle, including:

[0018] The minimum driving power of the engine in driving mode is determined by calculating the difference between the maximum required driving power of the vehicle and the rated power of the second motor.

[0019] Optionally, determining the rated power of the first motor and the rated power of the engine based on the average power demand includes:

[0020] Based on the average power demand, the second vehicle fuel saving rate is determined by adjusting the engine at a preset power generation operating point during the speed regulation process of the first motor.

[0021] The second total cost is determined based on the second vehicle fuel saving rate, the operating cost within the second preset service life, the vehicle purchase cost, and the estimated vehicle residual value.

[0022] The rated power of the first motor and the rated power of the engine are determined based on the second total cost.

[0023] Optionally, the power coupling mechanism includes a planetary gear mechanism, which includes a sun gear, a planet carrier, and a ring gear; the engine is connected to the planet carrier, the first motor is connected to the sun gear, and the second motor is connected to the ring gear.

[0024] After determining the rated power of the first motor and the rated power of the engine based on the average power demand, the method further includes:

[0025] The engine speed at a preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor are obtained.

[0026] The characteristic coefficients of the planetary gear mechanism are determined based on the engine speed at the preset operating point, the maximum operating speed of the first motor, and the maximum operating speed of the second motor.

[0027] Optionally, the characteristic coefficients of the planetary gear mechanism are determined to satisfy a first formula based on the engine speed at a preset operating point, the maximum operating speed of the first motor, and the maximum operating speed of the second motor. The first formula is:

[0028] n1 + K × n2 = (K + 1) × n3;

[0029] Wherein, n1 is the maximum operating speed of the first motor, n2 is the maximum operating speed of the second motor, and n3 is the speed of the engine at the preset operating point.

[0030] In a second aspect, the present invention provides a parameter matching device for a hybrid power system, wherein the parameter matching device for the hybrid power system performs the parameter matching method for the hybrid power system as described in any one of the first aspects, the parameter matching device for the hybrid power system comprising:

[0031] The rated power determination module for the second motor is used to determine the rated power of the second motor based on the braking energy recovery operating condition.

[0032] The maximum required drive power determination module for the whole vehicle is used to determine the maximum required drive power for the whole vehicle based on extreme climbing conditions.

[0033] The minimum drive power determination module for the engine in drive mode is used to determine the minimum drive power of the engine in drive mode based on the rated power of the second motor and the maximum required drive power of the vehicle.

[0034] The average power demand acquisition module is used to obtain the average power demand required for vehicle operation based on the development process.

[0035] The module for determining the rated power of the first motor and the rated power of the engine is used to determine the rated power of the first motor and the rated power of the engine based on the average power demand.

[0036] Thirdly, the present invention provides an electronic device, the electronic device comprising:

[0037] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the parameter matching method for the hybrid power system described in any one of the first aspects.

[0038] Thirdly, the present invention provides a hybrid vehicle, wherein the parameters of the hybrid vehicle are determined using the parameter matching method of the hybrid system described in any one of the first aspects.

[0039] The technical solution of this invention provides a parameter matching method for a hybrid power system. The hybrid power system includes at least an engine, a first motor, a second motor, a power battery, and a power coupling mechanism. The method includes: determining the rated power of the second motor based on regenerative braking conditions; determining the maximum required drive power of the vehicle based on extreme hill-climbing conditions; determining the minimum drive power of the engine in drive mode based on the rated power of the second motor and the maximum required drive power of the vehicle; obtaining the average required power of the vehicle under a target cycle condition; and determining the rated power of the first motor and the rated power of the engine based on the average required power. By obtaining different parameters, the optimal vehicle configuration is obtained to ensure vehicle performance.

[0040] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A flowchart of a parameter matching method for a hybrid power system provided in an embodiment of the present invention;

[0043] Figure 2 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention;

[0044] Figure 3 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention;

[0045] Figure 4 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention;

[0046] Figure 5 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention;

[0047] Figure 6 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of a parameter matching device for a hybrid power system provided in an embodiment of the present invention;

[0049] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] Figure 1 This is a flowchart illustrating a parameter matching method for a hybrid power system according to an embodiment of the present invention. This embodiment is applicable to parameter matching in hybrid power systems. The method can be executed by a parameter matching device for the hybrid power system, which can be implemented in hardware and / or software. The hybrid power system includes at least an engine, a first motor, a second motor, a power battery, and a power coupling mechanism. The power coupling mechanism can be a planetary gear set. The first motor is located at the planetary gear carrier of the planetary gear set and is mainly used for starting the engine, generating electricity, and balancing the output torque of the engine and the second motor. The second motor is connected to the ring gear of the planetary gear set and is mainly used for power output. The power battery is connected to both the first motor and the second motor. The hybrid power system integrates the engine, the first motor, the second motor, and the transmission mechanism, and can switch freely according to operating conditions, combining a series mode (engine generating electricity to drive the motor) and a parallel mode (engine and motor driving together). Figure 1 As shown, the method includes:

[0053] S101, based on the braking energy recovery condition, determine the rated power of the second motor.

[0054] In the regenerative braking mode, the second motor converts braking energy into electrical energy, ensuring that the peak capacity of the second motor in generator mode matches the upper limit of the vehicle's actual regenerative braking power. This allows for the determination of the optimal rated power of the second motor at the lowest possible total cost.

[0055] S102, based on extreme climbing conditions, determines the maximum required drive power of the entire vehicle.

[0056] The extreme climbing condition refers to the maximum gradient that a vehicle can stably climb on a hard, well-adhesive road surface when fully loaded and using the lowest gear. The resistance work during extreme climbing includes the sum of rolling resistance, wind resistance, and the component of gravity in the direction of travel. Since driving work equals resistance work, during normal, constant-speed climbing, the resistance work is calculated based on the designed climbing speed to obtain the maximum required driving power for the entire vehicle.

[0057] S103, based on the rated power of the second motor and the maximum required drive power of the vehicle, determine the minimum drive power of the engine in drive mode.

[0058] In the operation of the hybrid system, the engine and the second motor need to work together to meet the maximum driving power required by the vehicle. Since the rated power of the second motor is determined, the minimum driving power required by the engine to meet the driving power can be determined by combining the maximum driving power required by the vehicle. That is, the minimum driving power of the engine in driving mode.

[0059] S104, based on the development process, obtains the average power required for vehicle operation.

[0060] Among them, the average power required for vehicle operation is calculated by extracting real road test data or simulated road spectrum stored during the vehicle development process.

[0061] S105, determine the rated power of the first motor and the rated power of the engine based on the average power demand.

[0062] The average power demand determines the engine's efficient operating point, specifying the maximum time the engine can operate at its most efficient state during vehicle operation, thus minimizing fuel consumption. When actual demand exceeds the average power demand, the first motor absorbs excess power generated by the engine, storing it or supplying it to the second motor, preventing the engine from increasing its power output and entering an inefficient range. Conversely, when actual demand exceeds the average power demand, the first motor consumes battery power to drive the engine in the opposite direction, preventing its speed from dropping into an inefficient range. The rated power of the first motor and the engine are determined synchronously using the average power demand, achieving capacity matching, ensuring smooth vehicle operation, minimizing fuel consumption, avoiding waste, and guaranteeing vehicle performance.

[0063] This invention determines the rated power of the second motor based on regenerative braking conditions; determines the maximum required drive power of the vehicle based on extreme hill-climbing conditions; determines the minimum drive power of the engine in drive mode based on the rated power of the second motor and the maximum required drive power of the vehicle; obtains the average required power for vehicle operation based on the development process; and determines the rated power of the first motor and the engine based on the average required power. By obtaining different parameters, the optimal configuration for the entire life cycle cost is selected to ensure vehicle performance.

[0064] Optional, Figure 2 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0065] S201, based on the braking energy recovery working condition, obtains the maximum braking recovery energy under the preset road spectrum.

[0066] The preset road profile is the steepest and longest downhill section. Under the preset road profile, the maximum regenerative braking energy can be obtained during vehicle operation.

[0067] S202, the first vehicle fuel saving rate is determined based on the maximum regenerative braking energy.

[0068] The maximum energy recovery requires the maximum total motor power. The first vehicle fuel saving rate is basically proportional to the recovered energy, so the first vehicle fuel saving rate can be determined based on the maximum braking regenerative energy. Moreover, the overall vehicle cost is basically proportional to the total motor power, meaning that the higher the first vehicle fuel saving rate, the higher the cost of the second motor.

[0069] S203, based on the first vehicle fuel saving rate, determine the operating cost, vehicle purchase cost and estimated vehicle residual value within the first preset service life to determine the first total cost.

[0070] The first preset usage period can be the usable lifespan of the second motor, which can be estimated and set. The overall vehicle fuel efficiency rate can be used to calculate the first total cost within the first preset usage period of the second motor, the vehicle purchase cost, and the estimated residual value of the vehicle. This first total cost is the optimal total cost.

[0071] S204, determine the rated power of the second motor based on the first total cost.

[0072] Specifically, the optimal rated power of the second motor is selected based on the first total cost, and the rated power of the second motor is determined by combining the fuel saving rate and the first total cost, so as to meet the performance and cost-effectiveness of the hybrid system.

[0073] S205, based on extreme climbing conditions, determines the maximum required drive power for the entire vehicle.

[0074] S206, based on the rated power of the second motor and the maximum required drive power of the vehicle, determine the minimum drive power of the engine in drive mode.

[0075] S207, based on the development process, obtains the average power required for vehicle operation.

[0076] S208, determine the rated power of the first motor and the rated power of the engine based on the average power demand.

[0077] This invention, in its embodiments, obtains the maximum regenerative braking energy under a preset road spectrum based on regenerative braking conditions; determines a first vehicle fuel-saving rate based on the maximum regenerative braking energy; determines a first total cost based on the first vehicle fuel-saving rate, including operating costs, vehicle purchase costs, and estimated vehicle residual value within a first preset service life; and determines the rated power of the second motor based on the first total cost. Under regenerative braking conditions, the rated power of the second motor is determined by combining the fuel-saving rate and the first total cost, ensuring the performance of the second motor.

[0078] Optional, Figure 3 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention is shown below. Figure 3 As shown, the method includes:

[0079] S301, based on the braking energy recovery working condition, obtains the maximum braking recovery energy under the preset road spectrum.

[0080] S302 determines the first vehicle fuel saving rate based on the maximum regenerative braking energy.

[0081] S303, the first total cost is determined by the operating cost, vehicle purchase cost and estimated vehicle residual value within the first preset service life based on the first vehicle fuel saving rate.

[0082] S304, determine the rated power of the second motor based on the first total cost.

[0083] S305 determines the battery capacity of the power battery based on the maximum regenerative braking energy.

[0084] In the regenerative braking scenario, the rated power of the second motor is determined, as is the maximum power output of the second motor as a generator during braking. However, since the regenerative braking operation is conducted on the longest and steepest downhill section, the vehicle's gravitational potential energy is continuously converted into kinetic energy, which is then converted into electrical energy through braking by the second motor. Therefore, the battery capacity of the power battery needs to be determined based on the maximum regenerative braking energy to ensure sufficient storage space for the electrical energy. The battery capacity can be the usable capacity of the power battery, and the usable capacity must be greater than or equal to the maximum regenerative braking energy to ensure that all recovered electrical energy can be safely stored.

[0085] S306, based on extreme climbing conditions, determines the maximum required drive power for the entire vehicle.

[0086] S307 determines the minimum drive power of the engine in drive mode based on the rated power of the second motor and the maximum required drive power of the vehicle.

[0087] S308, based on the average power required for vehicle operation obtained during the development process.

[0088] S309, determine the rated power of the first motor and the rated power of the engine based on the average power demand.

[0089] In this embodiment of the invention, after determining the rated power of the second motor based on the first total cost, the battery capacity of the power battery is determined based on the maximum regenerative braking energy, ensuring that the electrical energy recovered under regenerative braking conditions can be safely stored by the power battery and avoiding overcharging of the power battery.

[0090] Optional, Figure 4 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention is shown below. Figure 4 As shown, the method includes:

[0091] S401, based on the braking energy recovery working condition, obtains the maximum braking recovery energy under the preset road spectrum.

[0092] S402 determines the first vehicle fuel saving rate based on the maximum regenerative braking energy.

[0093] S403, the first total cost is determined by the operating cost, vehicle purchase cost and estimated vehicle residual value within the first preset service life based on the first vehicle fuel saving rate.

[0094] S404, determine the rated power of the second motor based on the first total cost.

[0095] S405 determines the battery capacity of the power battery based on the maximum regenerative braking energy.

[0096] S406, based on extreme climbing conditions, determines the maximum required drive power for the entire vehicle.

[0097] S407 calculates the difference between the maximum required drive power of the vehicle and the rated power of the second motor to determine the minimum drive power of the engine in drive mode.

[0098] When the engine and the second motor drive simultaneously, they can meet the maximum driving power required by the vehicle. Given a fixed rated power for the second motor, the minimum driving power of the engine in driving mode can be determined by calculating the difference between the maximum driving power required by the vehicle and the rated power of the second motor. Alternatively, the minimum driving power of the engine in driving mode can be determined by combining the difference between the maximum driving power required by the vehicle and the rated power of the second motor with correction coefficients for transmission efficiency and dynamic response requirements, thus ensuring engine performance and reasonable cost.

[0099] S408 is based on the average power required for vehicle operation obtained during the development process.

[0100] S409, determine the rated power of the first motor and the rated power of the engine based on the average power demand.

[0101] This invention determines the maximum required drive power of the vehicle based on extreme climbing conditions; it then calculates the difference between the maximum required drive power and the rated power of the second motor to determine the minimum drive power of the engine in drive mode. This ensures a balance between engine cost and efficiency, guarantees that the engine operates in a high-efficiency range around the minimum drive power, and ensures that the vehicle can operate normally and safely even under extreme conditions.

[0102] Optional, Figure 5 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention is shown below. Figure 5 As shown, the method includes:

[0103] S501, based on the braking energy recovery working condition, obtains the maximum braking recovery energy under a preset road spectrum.

[0104] S502 determines the first vehicle fuel saving rate based on the maximum regenerative braking energy.

[0105] S503, based on the first vehicle fuel saving rate, the operating cost within the first preset service life, the vehicle purchase cost, and the estimated vehicle residual value are used to determine the first total cost.

[0106] S504, determine the rated power of the second motor based on the first total cost.

[0107] S505 determines the battery capacity of the power battery based on the maximum regenerative braking energy.

[0108] S506, based on extreme climbing conditions, determines the maximum required drive power for the entire vehicle.

[0109] S507 calculates the difference between the maximum required drive power of the vehicle and the rated power of the second motor to determine the minimum drive power of the engine in drive mode.

[0110] S508 is based on the average power required for vehicle operation obtained during the development process.

[0111] S509 determines the second vehicle fuel-saving rate by adjusting the engine at a preset power generation point during the speed regulation process of the first motor based on the average demand power.

[0112] The preset power generation condition is the engine's optimal power generation condition. Based on the average power demand, the second vehicle fuel-saving rate can be evaluated by adjusting the engine to the preset power generation condition point during speed regulation using the first motor. A higher power first motor results in stronger speed regulation capability, making it easier to adjust the engine to the optimal fuel consumption range, but it also consumes more electricity, and the cost of the first motor is higher. Conversely, a higher engine power allows for a wider range of operation within the high-efficiency range, reducing the need for speed regulation by the first motor and increasing its speed regulation benefits. However, for the same high-power engine, the cost will also increase.

[0113] S510, based on the second vehicle fuel saving rate, determines the operating cost, vehicle purchase cost, and estimated vehicle residual value within the second preset service life to determine the second total cost.

[0114] The second preset usage period can be the usable lifespan of the first motor, and can be estimated and set. The combined second vehicle fuel-saving rate can be used to calculate the second total cost by taking into account the operating cost of the first motor within the second preset usage period, the vehicle purchase cost, and the estimated residual value of the vehicle. This second total cost is the optimal total cost.

[0115] S511, the rated power of the first motor and the rated power of the engine are determined based on the second total cost.

[0116] Specifically, the optimal rated power of the first motor and the rated power of the engine are selected based on the second total cost, and the rated power of the first motor and the rated power of the engine are determined in combination with the second vehicle fuel saving rate and the second total cost, so as to meet the performance and cost-effectiveness of the hybrid system.

[0117] This invention provides a second vehicle fuel-saving rate by determining the first motor's speed adjustment of the engine at a preset power generation operating point during the speed regulation process, based on the average demand power. The second vehicle fuel-saving rate is used to determine the operating cost, vehicle purchase cost, and estimated vehicle residual value within a second preset service life, thus determining the second total cost. The second total cost is used to determine the rated power of the first motor and the engine. By combining the second vehicle fuel-saving rate and the second total cost, the rated power of the first motor and the engine are determined accordingly, ensuring the performance of the first motor and engine in terms of total system cost, control complexity, and actual fuel consumption.

[0118] Optionally, the power coupling mechanism includes a planetary gear mechanism, which includes a sun gear, a planet carrier, and a ring gear; the engine is connected to the planet carrier, the first motor is connected to the sun gear, and the second motor is connected to the ring gear. Figure 6 A flowchart of another parameter matching method for a hybrid power system provided in an embodiment of the present invention is shown below. Figure 6 As shown, the method includes:

[0119] S601, based on the braking energy recovery working condition, obtains the maximum braking recovery energy under a preset road spectrum.

[0120] S602 determines the first vehicle fuel saving rate based on the maximum regenerative braking energy.

[0121] S603, the first total cost is determined by the first vehicle fuel saving rate, the operating cost within the first preset service life, the vehicle purchase cost, and the estimated vehicle residual value.

[0122] S604, determine the rated power of the second motor based on the first total cost.

[0123] S605 determines the battery capacity of the power battery based on the maximum regenerative braking energy.

[0124] For the S606, the maximum required drive power of the entire vehicle is determined based on extreme climbing conditions.

[0125] S607 calculates the difference between the maximum required drive power of the vehicle and the rated power of the second motor to determine the minimum drive power of the engine in drive mode.

[0126] S608, based on the average power required for vehicle operation obtained during the development process.

[0127] S609 determines the second vehicle fuel-saving rate by adjusting the engine at a preset power generation point during the speed regulation process of the first motor based on the average demand power.

[0128] S610, based on the second vehicle fuel saving rate, determines the second total cost by including the operating cost, vehicle purchase cost, and estimated vehicle residual value within the second preset service life.

[0129] S611, the rated power of the first motor and the rated power of the engine are determined based on the second total cost.

[0130] S612, obtain the engine speed at the preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor.

[0131] The preset operating point is the preset high-efficiency operating point. After determining the rated power of the engine, the rated power of the first motor, and the rated power of the second motor, the engine speed at the preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor can be determined accordingly.

[0132] S613 determines the characteristic coefficients of the planetary gear mechanism based on the engine speed at the preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor.

[0133] In this equation, n1 + K × n2 = (K + 1) × n3, where n1 is the maximum operating speed of the first motor, n2 is the maximum operating speed of the second motor, and n3 is the engine speed at the preset operating point. The characteristic coefficient K of the planetary gear mechanism can then be determined. K is the ratio of the number of teeth on the ring gear to the number of teeth on the sun gear. The characteristic coefficient K of the planetary gear mechanism directly determines the speed relationship between the engine, the first motor, and the second motor. By determining the characteristic coefficient K of the planetary gear mechanism and combining it with the engine parameters, the first motor parameters, and the second motor parameters, the optimal configuration of the hybrid power system within its entire lifecycle cost can be guaranteed, ensuring optimal performance.

[0134] The embodiments of the present invention obtain the engine speed at a preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor; and determine the characteristic coefficients of the planetary gear mechanism based on the engine speed at the preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor to ensure the overall transmission efficiency of the system.

[0135] Based on the same inventive concept, embodiments of the present invention also provide a parameter matching device for a hybrid power system. This parameter matching device is used to execute the parameter matching method for a hybrid power system provided in any embodiment of the present invention. The parameter matching device for the hybrid power system can be implemented by software and / or hardware. Figure 7 This is a schematic diagram of the structure of a parameter matching device for a hybrid power system provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the parameter matching device for the hybrid power system includes:

[0136] The rated power determination module 201 for the second motor is used to determine the rated power of the second motor based on the braking energy recovery working condition.

[0137] The maximum required drive power determination module 202 for the whole vehicle is used to determine the maximum required drive power of the whole vehicle based on extreme climbing conditions.

[0138] The minimum drive power determination module 203 for the engine in drive mode is used to determine the minimum drive power of the engine in drive mode based on the rated power of the second motor and the maximum required drive power of the vehicle.

[0139] The average power demand acquisition module 204 is used to acquire the average power demand required for vehicle operation based on the development process.

[0140] The rated power determination module 205 for the first motor and the rated power determination module for the engine is used to determine the rated power of the first motor and the rated power of the engine based on the average power demand.

[0141] Therefore, the parameter matching device for the hybrid power system provided in this embodiment of the invention includes the technical features of the parameter matching method for the hybrid power system provided in any embodiment of the invention, and can achieve the beneficial effects of the parameter matching method for the hybrid power system provided in any embodiment of the invention. The similarities can be referred to the above description of the parameter matching method for the hybrid power system provided in this embodiment of the invention, and will not be repeated here.

[0142] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Figure 8 A schematic diagram of an electronic device 10, which can be used to implement embodiments of the present invention, is shown. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0143] like Figure 8As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0144] Multiple components in electronic device 10 are connected to input / output (I / O) interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of monitors, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0145] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as parameter matching methods for hybrid power systems.

[0146] In some embodiments, the parameter matching method for the hybrid power system may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via read-only memory (ROM) 12 and / or communication unit 19. When the computer program is loaded into random access memory (RAM) 13 and executed by processor 11, one or more steps of the parameter matching method for the hybrid power system described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the parameter matching method for the hybrid power system by any other suitable means (e.g., by means of firmware).

[0147] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0148] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0149] Based on the same inventive concept, this invention also provides a hybrid vehicle, wherein the parameters of the hybrid vehicle are determined using the parameter matching method of the hybrid system described in any of the above embodiments.

[0150] It should be noted that since the hybrid vehicle provided in this embodiment has the same or corresponding beneficial effects as the parameter matching method of the hybrid system, it will not be elaborated here.

[0151] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A parameter matching method for a hybrid power system, characterized in that, The hybrid power system includes at least an engine, a first electric motor, a second electric motor, a power battery, and a power coupling mechanism; the method includes: The rated power of the second motor is determined based on the braking energy recovery operating condition; Determine the maximum required drive power for the entire vehicle based on extreme climbing conditions; The minimum drive power of the engine in drive mode is determined based on the rated power of the second motor and the maximum required drive power of the vehicle. The average power required for vehicle operation is obtained based on the development process. The rated power of the first motor and the rated power of the engine are determined based on the average power demand. Determining the rated power of the second motor includes: Obtain the maximum regenerative braking energy under a preset road spectrum; The first vehicle fuel saving rate is determined based on the maximum regenerative braking energy. The first total cost is determined based on the first vehicle fuel saving rate, the operating cost within the first preset usage period, the vehicle purchase cost, and the estimated vehicle residual value. The rated power of the second motor is determined based on the first total cost; Determining the rated power of the first motor and the rated power of the engine based on the average power demand includes: Based on the average power demand, the second vehicle fuel saving rate is determined by adjusting the engine at a preset power generation operating point during the speed regulation process of the first motor. The second total cost is determined based on the second vehicle fuel saving rate, the operating cost within the second preset service life, the vehicle purchase cost, and the estimated vehicle residual value. The rated power of the first motor and the rated power of the engine are determined based on the second total cost.

2. The parameter matching method for a hybrid power system according to claim 1, characterized in that, After determining the rated power of the second motor, the process also includes: The battery capacity of the power battery is determined based on the maximum regenerative braking energy.

3. The parameter matching method for a hybrid power system according to claim 1, characterized in that, Based on the rated power of the second motor and the maximum required drive power of the vehicle, the minimum drive power of the engine in drive mode is determined, including: The minimum driving power of the engine in driving mode is determined by calculating the difference between the maximum required driving power of the vehicle and the rated power of the second motor.

4. The parameter matching method for a hybrid power system according to claim 1, characterized in that, The power coupling mechanism includes a planetary gear mechanism, which includes a sun gear, a planet carrier, and a ring gear; the engine is connected to the planet carrier, the first motor is connected to the sun gear, and the second motor is connected to the ring gear. After determining the rated power of the first motor and the rated power of the engine based on the average power demand, the method further includes: The engine speed at a preset operating point, the maximum operating speed of the first motor, and the maximum speed of the second motor are obtained. The characteristic coefficients of the planetary gear mechanism are determined based on the engine speed at the preset operating point, the maximum operating speed of the first motor, and the maximum operating speed of the second motor.

5. The parameter matching method for a hybrid power system according to claim 4, characterized in that, Based on the engine speed at a preset operating point, the maximum operating speed of the first motor, and the maximum operating speed of the second motor, the characteristic coefficients of the planetary gear mechanism are determined to satisfy a first formula, which is: n1 + K × n2 = (K + 1) × n3; Wherein, n1 is the maximum operating speed of the first motor, n2 is the maximum operating speed of the second motor, and n3 is the speed of the engine at the preset operating point.

6. A parameter matching device for a hybrid power system, characterized in that, The parameter matching device of the hybrid power system performs the parameter matching method of the hybrid power system according to any one of claims 1-5, wherein the parameter matching device of the hybrid power system comprises: The rated power determination module for the second motor is used to determine the rated power of the second motor based on the regenerative braking condition; the determination of the rated power of the second motor includes: Obtain the maximum regenerative braking energy under a preset road spectrum; The first vehicle fuel saving rate is determined based on the maximum regenerative braking energy. The first total cost is determined based on the first vehicle fuel saving rate, the operating cost within the first preset usage period, the vehicle purchase cost, and the estimated vehicle residual value. The rated power of the second motor is determined based on the first total cost; The maximum required drive power determination module for the whole vehicle is used to determine the maximum required drive power for the whole vehicle based on extreme climbing conditions. The minimum drive power determination module for the engine in drive mode is used to determine the minimum drive power of the engine in drive mode based on the rated power of the second motor and the maximum required drive power of the vehicle. The average power demand acquisition module is used to obtain the average power demand required for vehicle operation based on the development process. The module for determining the rated power of the first motor and the rated power of the engine is used to determine the rated power of the first motor and the rated power of the engine based on the average power demand. Determining the rated power of the first motor and the rated power of the engine based on the average power demand includes: Based on the average power demand, the second vehicle fuel saving rate is determined by adjusting the engine at a preset power generation operating point during the speed regulation process of the first motor. The second total cost is determined based on the second vehicle fuel saving rate, the operating cost within the second preset service life, the vehicle purchase cost, and the estimated vehicle residual value. The rated power of the first motor and the rated power of the engine are determined based on the second total cost.

7. An electronic device, characterized in that, The electronic device includes: At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the parameter matching method for the hybrid power system according to any one of claims 1-5.

8. A hybrid vehicle, characterized in that, The parameters of the hybrid vehicle are determined using the parameter matching method for the hybrid system as described in any one of claims 1-5.

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