Range-extended vehicle energy management system and range-extended vehicle

Abstract

The present application relates to an extended-range vehicle energy management system and an extended-range vehicle. The system includes an efficacy calculation component and a power limiting component. The power limiting component is connected to the efficacy calculation component, including a battery charging and discharging power limiting unit, a vehicle system charging power limiting unit and a vehicle system discharging power limiting unit; the battery charging and discharging power limiting unit is used to determine the battery charging power limit and the battery discharging power limit; the vehicle system charging power limiting unit is used to determine the vehicle system charging power limit, so as to control the power generation of the extended-range motor according to the vehicle system charging power limit; the vehicle system discharging power limiting unit is used to determine the vehicle system discharging power limit, so as to control the drive motor according to the vehicle system discharging power limit. The system provided by the present application can improve the problem of high coupling degree of energy management systems in the prior art.

Description

Technical Field

[0001] The present application relates to the field of automobile control technology, and in particular to an extended-range automobile energy management system and an extended-range automobile. Background Art

[0002] The energy management system refers to a system that controls and manages the energy flow of the vehicle to improve energy efficiency and mileage. Its goal is to maximize the use of energy resources and reduce energy waste while ensuring the normal operation of the vehicle.

[0003] Traditionally, vehicle energy management functions are implemented by the vehicle controller VCU, which is mostly based on library models (models are built using MATLAB library modules) and then combined into a large model. A large model implements all energy management related functions. Different functions use the same input signal for processing. The entire software function implementation link is unclear and has a high degree of coupling. During the software development process, it is easy to make errors when optimizing and modifying the large model, which increases software development time and is not conducive to problem troubleshooting and function maintenance, nor is it conducive to function expansion. Summary of the invention

[0004] Based on this, an extended-range vehicle energy management system and an extended-range vehicle are provided to improve the problem of high coupling degree of energy management systems in the prior art.

[0005] In one aspect, an extended range vehicle energy management system is provided, the system comprising:

[0006] A power calculation component, comprising a power calculation unit, wherein the power calculation unit is used to obtain power parameters of various high-voltage components, wherein the high-voltage components include a battery, a range extender motor, a drive motor, and a high-voltage accessory, and the power parameters of the high-voltage components include a first charge and discharge power limit of the battery, wherein the first charge and discharge power limit of the battery is determined according to the battery voltage and the battery charge and discharge current limit;

[0007] A power limiting component, connected to the efficacy calculation component, including a battery charging and discharging power limiting unit, a vehicle system charging power limiting unit, and a vehicle system discharging power limiting unit;

[0008] The battery charge and discharge power limiting unit is used to determine the battery charge power limit and the battery discharge power limit according to the first charge and discharge power limit of the battery and the battery operating condition charge and discharge power limit, and the battery operating condition charge and discharge power limit is determined by the battery management system;

[0009] The whole vehicle system charging power limiting unit is used to determine the whole vehicle system charging power limit according to the battery charging power limit and the power of the high-voltage accessories, so as to control the range-extending motor to generate electricity according to the whole vehicle system charging power limit;

[0010] The vehicle system discharge power limiting unit is used to determine the vehicle system discharge power limit according to the battery discharge power limit and the power generation power of the range extender motor, so as to control the drive motor according to the vehicle system discharge power limit.

[0011] In one embodiment, the power limiting component further comprises a drive motor drive power limiting unit;

[0012] The drive motor driving power limiting unit is used to determine the drive motor driving power limit according to the vehicle system discharge power limit and the power of the high-voltage accessories, so as to control the drive motor according to the drive motor driving power limit.

[0013] In one embodiment, the power calculation component also includes an efficiency calculation unit, which is used to determine the driving efficiency of the drive motor based on the electric power and mechanical power of the drive motor, and the drive motor driving power limitation unit is used to determine the drive motor driving power limit based on the vehicle system discharge power limit, the power of the high-voltage accessories and the driving efficiency.

[0014] In one embodiment, the power limiting component further includes a range extender power generation limiting unit, which is used to determine the range extender power generation limit according to the vehicle system charging power limit and the power of the drive motor when the vehicle is in a driving state.

[0015] In one embodiment, the power calculation component also includes a driver demand power calculation unit, which is used to determine the energy recovery power required by the driver according to the energy recovery torque when the vehicle recovers energy. The range extender power generation power limitation unit is also used to determine the range extender power generation power limit according to the charging power limit of the whole vehicle system and the power and energy recovery power of the drive motor when the vehicle recovers energy.

[0016] In one embodiment, the extended-range vehicle energy management system also includes a torque limiting component, which is connected to the power limiting component and includes a drive motor drive torque limiting unit. The drive motor drive torque limiting unit is used to determine the drive motor drive torque limit according to the drive motor drive power limit, so as to control the drive motor according to the drive motor drive torque limit.

[0017] In one embodiment, the range-extended vehicle energy management system further includes a torque limiting component, which is connected to the power limiting component. The torque limiting component further includes a range-extended motor power generation torque limiting unit, which is used to determine the range-extended motor power generation torque limit value according to the range-extender power generation power limit value, so as to control the range-extender power generation according to the range-extended motor power generation torque limit value.

[0018] In one embodiment, the power limiting component also includes an energy recovery power limiting unit, which is used to determine the energy recovery power limit value. The torque limiting component also includes a drive motor recovery torque limiting unit, which is used to determine the drive motor recovery torque limit value based on the energy recovery power limit value, so as to control the drive motor energy recovery according to the drive motor recovery torque limit value during energy recovery.

[0019] In one embodiment, the power limiting component further includes an electric power limiting unit of the range extender motor, which is used to determine the electric power limit value of the range extender motor when the range extender motor is dragging the engine to start, and the torque limiting unit further includes an electric torque limiting unit of the range extender motor, which is used to determine the electric torque limit value of the range extender motor according to the electric power limit value of the range extender motor, so as to control the electric start of the range extender according to the electric torque limit value of the range extender motor.

[0020] On the other hand, an extended-range vehicle is provided, the extended-range vehicle comprising the above-mentioned extended-range vehicle energy management system.

[0021] The above-mentioned extended-range vehicle energy management system includes an efficacy calculation component and a power limitation component. The efficacy calculation component includes a power calculation unit to obtain the power parameters of each high-voltage component, mainly including the first charging and discharging power limit of the battery. The power limitation component includes a battery charging and discharging power limitation unit, a vehicle system charging power limitation unit and a vehicle system discharging power limitation unit, which are respectively used to calculate the battery charging and discharging power limit, the vehicle system charging power limit and the vehicle system discharging power limit. The extended-range vehicle energy management system generates electricity or drives the motor of the vehicle according to these limits; each component or unit completes a type of function, realizes the decoupling of their respective functions, makes the system more flexible and scalable, and the signal transmission link is clear, reducing the workload of software development. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of an energy management system for an extended-range vehicle in one embodiment;

[0023] Figure 2 A schematic diagram of signal transmission between a power limiting component and a torque limiting component in one embodiment;

[0024] Figure 3 A schematic diagram of signal transmission for calculating a driving power limit of a driving motor in one embodiment;

[0025] Figure 4 A schematic diagram of signal transmission for calculating a power limit of a range extender in one embodiment.

[0026] Reference numerals:

[0027] Efficacy calculation component 10, power calculation unit 101, efficiency calculation unit 102, driver demand power calculation unit 103;

[0028] Power limiting component 20, battery charging and discharging power limiting unit 201, vehicle system charging power limiting unit 202, vehicle system discharging power limiting unit 203, drive motor driving power limiting unit 204, energy recovery power limiting unit 205, range extender power generation power limiting unit 206, range extender motor electric power limiting unit 207;

[0029] The torque limiting assembly 30 , the driving motor driving torque limiting unit 301 , the driving motor recovery torque limiting unit 302 , the range-extending motor generating torque limiting unit 303 , and the range-extending motor electric torque limiting unit 304 . DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] Extended-range vehicles are equipped with a variety of different energy sources, and their corresponding energy management systems are more complex than those of traditional vehicles or pure electric vehicles. Currently, the energy management function of extended-range vehicles is implemented by the vehicle controller, which is mostly based on library models and combined into a large model. A large model implements all energy management related functions. When modifying or adding a certain function, the entire model needs to be modified, which has high coupling and poor flexibility.

[0032] The present application provides an extended-range vehicle energy management system, in which various functions are decoupled and implemented by corresponding components or units, and has high flexibility. In the present application, in view of the problems existing in the existing energy management software architecture, the functions related to the energy management of the extended-range vehicle are sorted out and integrated, and the energy management software architecture of the whole vehicle controller is designed based on the SOA architecture (Service-Oriented Architecture, service-oriented). Each component or unit can be a reusable software component (Software Component, SWC) that can be independently deployed, operated and maintained. SWC organizes business functions in a modular way, and each component is responsible for a specific function or business process. This modular design makes the software system more maintainable, scalable and reusable. The SWC component encapsulates the business function as a service, and describes the input and output of the service by defining interfaces and protocols. This encapsulation allows the SWC component to be independently developed, deployed and maintained, and can be integrated with other components in a standardized manner to obtain various state signals of the bus input.

[0033] In one embodiment, Figure 1 As shown, the range-extended vehicle energy management system includes a power efficiency calculation component 10 and a power limitation component 20 .

[0034] Among them, efficacy includes power and efficiency. The efficacy calculation component 10 includes a power calculation unit 101. The power calculation unit 101 can calculate the electric power based on the voltage and current of the high-voltage component. Specifically, the high-voltage component includes a battery. In the actual implementation process, based on the technical parameters of the battery itself, a battery charge and discharge current limit is set, such as the maximum driving current limit of the battery and the maximum charging current limit of the battery. When the current limit is reached, the corresponding protection measures will be forcibly activated. In this embodiment, the power calculation unit 101 determines the first charge and discharge power limit of the battery (including the first discharge power limit and the first charging power limit) according to the monitored battery pack voltage and the battery charge and discharge current limit.

[0035] The high-voltage components include a range extender motor, which is part of the range extender. When the vehicle needs the range extender to work to supplement the electric energy, the range extender motor first acts as a motor, relying on the electric energy provided by the battery to start and reach a certain speed, and then drives the engine to work and start. After the engine starts, it drives the range extender motor to rotate, and then the range extender motor operates as a generator. The power calculation unit 101 can calculate the electric power consumption according to the input voltage and input current of the range extender motor when the range extender motor acts as a motor, and calculate the power generation power according to the output voltage and output current when the range extender motor acts as a generator.

[0036] The high-voltage components include a drive motor, which is the power source of the extended-range vehicle. The drive motor is connected to the reducer, the reducer is connected to the drive shaft, and the drive shaft is connected to the wheels. When the driver is driving the vehicle, the drive motor usually acts as an electric motor, using the electric energy provided by the battery to drive the vehicle forward. When the driver releases the accelerator pedal, the energy recovery function is started and the drive motor is used as a generator. The power calculation unit 101 can calculate the power consumption according to the input voltage and input current of the drive motor when the drive motor acts as a motor, and calculate the power generation according to the output voltage and output current when the drive motor acts as a generator.

[0037] The high voltage components include high voltage accessories, such as a DC / DC converter, a compressor of an air conditioning system, and a heater. These high voltage accessories are electrical appliances, and the power calculation unit 101 calculates their electrical power according to their input voltage and input current.

[0038] The power limiting component 20 is connected to the efficacy calculation component 10 and is used to calculate and output various restrictive parameters, illustratively including a battery charging and discharging power limiting unit 201 , a vehicle system charging power limiting unit 202 and a vehicle system discharging power limiting unit 203 .

[0039] The battery charge and discharge power limiting unit 201 is used to determine the battery charge power limit and the battery discharge power limit according to the first charge and discharge power limit of the battery and the battery working condition charge and discharge power limit. The battery working condition charge and discharge power limit is a restrictive value output by the battery management system after integrating the working condition information such as the temperature of the battery, requiring that the actual charge and discharge power of the battery shall not be greater than the battery working condition charge and discharge power limit. The battery charge and discharge power limiting unit 201 may include two subunits, namely a battery discharge power limiting subunit and a battery charge power limiting subunit.

[0040] In this embodiment, the two subunits take the smaller value of the first charge and discharge power limit and the battery operating condition charge and discharge power limit as the actual limit. For example, the smaller value of the first discharge power limit and the operating condition discharge power limit is taken as the battery discharge power limit for output, and the smaller value of the first charging power limit and the operating condition charging power limit is taken as the battery charging power limit.

[0041] The vehicle system charging power limiting unit 202 is used to determine the vehicle system charging power limit according to the battery charging power limit and the power of the high-voltage accessories. Specifically, the vehicle system charging power limit = battery charging power limit + high-voltage accessory power (heater power + DCDC power + compressor power). The vehicle system charging power is used to guide the power generation of the range extender.

[0042] The vehicle system discharge power limiting unit 203 is used to determine the vehicle system discharge power limit according to the battery discharge power limit and the power generation power of the range extender motor. The vehicle system discharge power limit is used to guide the power consumption of the vehicle's drive motor and high-voltage accessories. Specifically:

[0043] When the vehicle is in a normal state (battery power is higher than 10%), the energy source of the vehicle is the range extender power generation + battery, and the vehicle system discharge power limit = battery discharge power limit + generator power generation;

[0044] When the battery power is lower than 10%, if the range extender is not in the start-up state, the battery discharge power is limited to a certain extent, P1 = P*A, P1 is the modified battery discharge power limit, P is the original battery discharge power limit, A is the limit coefficient, as the power decreases, the limit coefficient decreases, the minimum is 0.5 (calibrable), at this time the output vehicle system discharge power limit = P1 = P*A;

[0045] When the battery power is lower than 10%, if the range extender is in the start-up state, the power is maintained within the maximum capacity of the range extender, P1 = P*B, B is the limit coefficient, as the power decreases, the limit coefficient decreases, the minimum is 0.3 (calibrable), at the same power level B < A, at this time the vehicle system discharge power limit = P1 + generator power;

[0046] If the battery power is lower than 5%, there is a risk of power shortage, and the battery discharge power P1 is limited to no more than 30kw (calibrable);

[0047] If the battery power is 0% or less than 3% and the available power is less than 10kw, the battery will be completely restricted from external discharge under pure electric conditions, and the above restrictions will still apply when the range extender is started;

[0048] When the vehicle is in DC charging preheating, the energy source of the vehicle is the DC charging pile, and the vehicle system discharge power is limited to a fixed value (depending on the charging capacity);

[0049] When the vehicle is in DC charging state, the energy source of the vehicle is DC charging pile + battery pack, and the vehicle system discharge power limit = P1 + a fixed value (depending on the charging capacity);

[0050] When the vehicle is in the AC charging preheating state, the energy source of the vehicle is OBC (on board charger), and the vehicle system discharge power limit = OBC maximum allowable charging power;

[0051] When the vehicle is in AC charging state, the energy source of the vehicle is OBC and battery, and the vehicle system discharge power limit = OBC maximum allowable charging power + P1.

[0052] The battery charging power limit, battery discharging power limit, vehicle system charging power limit, and vehicle system discharging power limit obtained in the above manner can all be output to other nodes in the communication network for other controllers to call. In the above-mentioned extended-range vehicle energy management system, the basic power parameter acquisition is realized by the power calculation component 10, and the calculation of each limit is realized by the power limit component 20. The functions are decoupled, the links are clear, the functions are expanded, the software model connections are reduced, and the software development workload is reduced.

[0053] In one embodiment, the power limiting component 20 further includes a driving motor driving power limiting unit 204 for determining the driving motor driving power limit value according to the vehicle system discharge power limit value and the power of the high-voltage accessories.

[0054] Exemplarily, when considering the driving power limit of the driving motor, the starting power required for the range extender in the non-starting state can also be added as a reference. In addition, the necessary efficiency loss of the driving motor can also be considered. Therefore, the driving power limit of the driving motor = (the discharge power limit of the whole vehicle system - the actual power of DCDC - the starting power of the range extender reserved when the range extender is not started - the actual power of the compressor - the actual power of the heater) * the motor efficiency. The driving power limit of the driving motor calculated in this way can be used to guide the power consumption of the driving motor when driving the vehicle.

[0055] In one embodiment, the aforementioned motor efficiency can be obtained by deploying the efficiency calculation unit 102 in the power calculation component 10 .

[0056] Exemplarily, the efficiency calculation unit 102 can determine the driving efficiency of the driving motor based on the electric power and mechanical power of the driving motor. The electric power is calculated according to the input current and input voltage of the motor, and the mechanical power can be calculated according to P2=T*N / 9550, where T and N are the torque and speed of the driving motor, respectively.

[0057] In another embodiment, the efficiency calculation unit 102 obtains the motor efficiency by checking the motor external characteristics based on the torque and speed of the driving motor and the generator.

[0058] In one embodiment, the power limiting component 20 further includes a range extender power generation limiting unit 206 , which outputs corresponding range extender power generation limit values ​​when the vehicle is in a driving state and an energy recovery state.

[0059] Exemplarily, when the vehicle is in the driving state, that is, when the drive motor is used as an electric motor, the power generation power of the range extender should not exceed the sum of the charging power limit of the vehicle system and the power of the drive motor. Therefore, at this time, the power generation power limit of the range extender = the charging power limit of the vehicle system + the actual power consumption of the drive motor.

[0060] When the vehicle is in the energy recovery state, that is, when the drive motor is used as a generator, the total power generation of the drive motor and the range extender motor should not exceed the total power consumption. Therefore, the range extender power generation limit = vehicle system charging power limit - |actual power generation of the drive motor| (the power value is negative when generating electricity); on the other hand, the power generation of the drive motor is affected by the driver, for example, the energy recovery torque is affected by the energy recovery level set by the driver, the vehicle speed when the accelerator pedal is released, etc. Different energy recovery levels and vehicle speeds correspond to different decelerations and different energy recovery torques. The energy recovery power required by the driver is calculated according to P = TN / 9550. T is the braking energy recovery torque during energy recovery, and then calculated according to the range extender power generation limit = vehicle system charging power limit - |min (energy recovery power, actual power generation of the drive motor)|.

[0061] The energy recovery power required by the driver can be calculated by the driver required power calculation unit 103 disposed in the power calculation component 10 .

[0062] In one embodiment, Figure 2 As shown, the range-extended vehicle energy management system deploys a torque limiting component 30 to calculate the torque limit of the drive motor or the range-extended motor through the aforementioned various power limits, so that the motor controller can control the corresponding motor operation based on the torque limit.

[0063] Exemplarily, the torque limiting component 30 is connected to the power limiting component 20, and includes a drive motor drive torque limiting unit 301, which is used to determine the drive motor drive torque limit according to the drive motor drive power limit and the formula T=P*9550 / N.

[0064] The torque limiting component 30 also includes a drive motor recovery torque limiting unit 302, which is used to determine the drive motor recovery torque limit value based on the energy recovery power limit value in combination with the formula T=P*9550 / N. The energy recovery power limit value can be obtained by the energy recovery power limiting unit 205 deployed in the power limiting component 20. The energy recovery power limiting unit 205 can determine the energy recovery power limit value according to the corresponding relationship in combination with the driver's setting of the energy recovery level.

[0065] The torque limiting assembly 30 further includes a range extender motor torque limiting unit 303, which is used to determine the range extender motor torque limit value according to the aforementioned range extender power limit value in combination with the formula T=P*9550 / N.

[0066] The torque limiting unit also includes an extended-range motor electric torque limiting unit 304, which outputs an extended-range motor electric torque limit value, which is used to guide the operation of the extended-range motor during the process of starting the extended-range motor dragging the engine. Specifically, the extended-range motor electric power limiting unit 207 is deployed in the power limiting component 20 to determine the extended-range motor electric power limit value when the extended-range motor drags the engine to start. For example, the extended-range motor electric power limit value can be a fixed value, or the electric power limit value is determined according to the current power supply margin. The extended-range motor electric torque limit value can also be calculated in combination with the formula T = P*9550 / N.

[0067] The following is an illustrative description of the driving torque limiting process of the driving motor in combination with the aforementioned process.

[0068] like Figure 3 As shown, the power calculation unit 101 in the power calculation component 10 calculates the DCDC, compressor, heater power, drive motor power, and battery power. According to the aforementioned method, the battery power is determined according to the battery voltage and the battery charge and discharge current limit.

[0069] The efficiency calculation unit 102 in the power calculation component 10 calculates the efficiency of the driving motor and the efficiency of the range-extending motor respectively. The input parameters of the efficiency calculation unit 102 may come from the power calculation unit 101 .

[0070] The power limiting component 20 includes a battery discharge power limiting subunit, a vehicle system discharge power limiting unit 203, and a drive motor drive power limiting unit 204, wherein the battery power is input to the battery discharge power limiting unit to obtain a battery discharge power limit value.

[0071] The battery discharge power limit and the power generation power of the range extender motor are input to the vehicle system discharge power limit unit 203, and the vehicle system discharge power limit is obtained according to the mathematical expression ①.

[0072] The vehicle system discharge power limit is input to the drive motor drive power limit unit 204, and the DCDC, compressor, heater power, and drive motor efficiency are also input. The drive motor drive power limit is calculated according to mathematical expression ②.

[0073] The driving power limit value of the driving motor is input into the driving motor torque limit unit, thereby obtaining the driving motor torque limit value.

[0074] The mathematical expressions ① and ② above are respectively:

[0075] Mathematical expression ①: Vehicle system discharge power limit = battery discharge power limit + range-extended motor power generation;

[0076] Mathematical expression ②: Drive motor drive power limit = (vehicle system discharge power limit - DCDC actual power - range extender start-up power reserved when the range extender is not started - compressor actual power - heater actual power) * motor efficiency.

[0077] like Figure 4 As shown, the following is combined with the above process to exemplify the process of limiting the power generation torque of the range-extended motor.

[0078] The power calculation component 10 further includes a driver demand power calculation unit 103 for calculating the driver demand power according to P=TN / 9550. During energy recovery, T is calculated according to the energy recovery torque.

[0079] First, the battery power is input into the battery charging power limiting subunit to obtain the battery charging power limit value, and then input into the vehicle system charging power limiting unit 202 .

[0080] The vehicle system charging power limiting unit 202 obtains the DCDC, compressor, PTC power and battery charging power limit, calculates the vehicle system charging power limit according to mathematical expression ③, and inputs it to the range extender power generation power limiting unit 206.

[0081] The range extender power generation limit unit 206 also receives the driver's required power and the driving motor power. When the vehicle is in the driving state, it calculates the range extender power generation limit according to the mathematical expression ④. When the vehicle is in the energy recovery state, it calculates the range extender power generation limit according to the mathematical expression ⑤, and inputs the range extender power generation limit into the range extender motor power generation torque limit unit 303.

[0082] The range extender motor generating torque limiting unit 303 calculates the range extender motor generating torque limit value according to the range extender generating power limit value.

[0083] The mathematical expressions ③, ④, and ⑤ above are respectively:

[0084] Mathematical expression ③: Vehicle system charging power limit = battery charging power limit + high-voltage accessory power;

[0085] Mathematical expression ④: Range extender power limit = vehicle system charging power limit + actual electric power of the drive motor;

[0086] Mathematical expression ⑤: Range extender power limit = vehicle system charging power limit - |min(power required by the driver, actual power generated by the drive motor)|.

[0087] In more embodiments, the torque limiting unit may also include an engine torque limiting unit, which obtains the maximum engine torque by looking up the engine external characteristics in a two-dimensional table of atmospheric pressure and engine speed, and obtains the engine torque limit by taking the smaller of the maximum torque at the flywheel end generated by the engine itself.

[0088] In addition, regarding the torque limit of the drive motor, based on the above, the minimum torque limit of the drive motor can also be obtained by looking up the motor external characteristic diagram through the speed.

[0089] In one embodiment, the efficacy calculation component 10 can also use the calculated efficiencies to derive the energy transfer process of the entire vehicle. Specifically, an energy flow calculation unit is deployed in the efficacy calculation component 10, and an energy flow judgment model is built based on the current signals and vehicle speed signals of each high-voltage component input by the bus, and the vehicle mode status signals (charging status, discharging status, range extender start status, normal status, etc.) input by other modules. The current state of the entire vehicle energy flow is judged based on the current state and vehicle speed state of the drive motor, battery, range extender motor, engine, and charger. When the conditions are met, the output of each energy flow enable request is maintained to the bus, and the instrument energy flow animation is controlled to light up. The calculation logic for judging the energy flow state during the start-up and power generation process of the range extender of the range extender is described as follows:

[0090] When the input current of the range extender motor is detected to be greater than 3A and lasts for 0.5s, the energy flow between the range extender motor current and the engine is sent = the range extender motor to the engine; when the current of the battery and the range extender motor is detected to be greater than 3A and lasts for 0.5s, the energy flow between the battery pack and the generator is sent = the battery to the range extender motor. At this time, the energy flow animation of the instrument is displayed as battery → range extender motor → engine.

[0091] When the range extender motor current is detected to be less than -3A and lasts for 0.5s, the energy flow between the range extender motor and the engine is sent = engine to generator; when the range extender motor and battery current are detected to be less than -3A and last for 0.5s, the energy flow between the battery and the range extender motor is sent = range extender motor to battery pack, and then the request is maintained. Only when the battery current is detected to be greater than 0A and lasts for 0.5s or the range extender motor current is greater than 0A, the request is stopped. At this time, the instrument energy flow animation is displayed as engine → range extender motor → battery pack.

[0092] The judgment of other energy flows, such as the energy flow when the battery discharges and the driving motor is driving, the energy flow when the driving motor recovers and generates energy and transmits it to the battery, the energy flow when the gun is plugged in for charging, and the energy flow when the external discharge gun is discharged, is similar.

[0093] Each module / component / unit in the above-mentioned extended-range vehicle energy management system can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0094] In one embodiment, a range-extended vehicle is provided, which includes a battery, a range-extended motor, a drive motor and high-voltage accessories. The range-extended vehicle also includes the range-extended vehicle energy management system of the aforementioned embodiments or implementations. The use of this system improves the problems of unclear links and high coupling degree of the original energy management software.

[0095] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0096] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An extended-range vehicle energy management system, characterized in that: include: A power calculation component, comprising a power calculation unit, wherein the power calculation unit is used to obtain power parameters of various high-voltage components, wherein the high-voltage components include a battery, a range extender motor, a drive motor, and a high-voltage accessory, and the power parameters of the high-voltage components include a first charge and discharge power limit of the battery, wherein the first charge and discharge power limit of the battery is determined according to the battery voltage and the battery charge and discharge current limit; A power limiting component, connected to the efficacy calculation component, including a battery charging and discharging power limiting unit, a vehicle system charging power limiting unit, and a vehicle system discharging power limiting unit; The battery charge and discharge power limiting unit is used to determine the battery charge power limit and the battery discharge power limit according to the first charge and discharge power limit of the battery and the battery operating condition charge and discharge power limit, and the battery operating condition charge and discharge power limit is determined by the battery management system; The whole vehicle system charging power limiting unit is used to determine the whole vehicle system charging power limit according to the battery charging power limit and the power of the high-voltage accessories, so as to control the range-extending motor to generate electricity according to the whole vehicle system charging power limit; The vehicle system discharge power limiting unit is used to determine the vehicle system discharge power limit according to the battery discharge power limit and the power generation power of the range extender motor, so as to control the drive motor according to the vehicle system discharge power limit.

2. The range-extended vehicle energy management system according to claim 1, characterized in that: The power limiting component also includes a drive motor drive power limiting unit; The drive motor driving power limiting unit is used to determine the drive motor driving power limit according to the vehicle system discharge power limit and the power of the high-voltage accessories, so as to control the drive motor according to the drive motor driving power limit.

3. The range-extended vehicle energy management system according to claim 2, characterized in that: The power calculation component also includes an efficiency calculation unit, which is used to determine the driving efficiency of the drive motor based on the electric power and mechanical power of the drive motor. The drive motor driving power limitation unit is used to determine the drive motor driving power limit based on the vehicle system discharge power limit, the power of the high-voltage accessories and the driving efficiency.

4. The range-extended vehicle energy management system according to claim 1, characterized in that: The power limiting component also includes a range extender power generation limiting unit, which is used to determine the range extender power generation limit according to the vehicle system charging power limit and the power of the drive motor when the vehicle is in a driving state.

5. The range-extended vehicle energy management system according to claim 4, characterized in that: The efficiency calculation component also includes a driver demand power calculation unit, which is used to determine the energy recovery power required by the driver according to the energy recovery torque when the vehicle recovers energy. The range extender power generation power limitation unit is also used to determine the range extender power generation power limit according to the charging power limit of the whole vehicle system and the power and energy recovery power of the drive motor when the vehicle recovers energy.

6. The range-extended vehicle energy management system according to claim 2, characterized in that: The extended-range vehicle energy management system also includes a torque limiting component, which is connected to the power limiting component and includes a drive motor drive torque limiting unit. The drive motor drive torque limiting unit is used to determine the drive motor drive torque limit according to the drive motor drive power limit, so as to control the drive motor according to the drive motor drive torque limit.

7. The range-extended vehicle energy management system according to claim 4 or 5, characterized in that: The range-extended vehicle energy management system also includes a torque limiting component, which is connected to the power limiting component. The torque limiting component also includes a range-extended motor power generation torque limiting unit, which is used to determine the range-extended motor power generation torque limit according to the range-extender power generation power limit, so as to control the range-extender power generation according to the range-extended motor power generation torque limit.

8. The range-extended vehicle energy management system according to claim 6, characterized in that: The power limiting component also includes an energy recovery power limiting unit, which is used to determine the energy recovery power limit value. The torque limiting component also includes a drive motor recovery torque limiting unit, which is used to determine the drive motor recovery torque limit value based on the energy recovery power limit value, so as to control the drive motor energy recovery according to the drive motor recovery torque limit value during energy recovery.

9. The range-extended vehicle energy management system according to claim 6, characterized in that: The power limiting component also includes an electric power limiting unit for the range extender motor, which is used to determine the electric power limit value of the range extender motor when the range extender motor is started by dragging the engine. The torque limiting unit also includes an electric torque limiting unit for the range extender motor, which is used to determine the electric torque limit value of the range extender motor according to the electric power limit value of the range extender motor, so as to control the electric start of the range extender according to the electric torque limit value of the range extender motor.

10. A range-extended vehicle, characterized in that: The extended-range vehicle comprises the extended-range vehicle energy management system according to any one of claims 1-9.

Images