An intelligent control module for electric vehicle power system

Abstract

This utility model discloses an intelligent control module for an electric vehicle power system, including a vehicle control unit, an engine control unit, a methanol fuel supply control module, a PO motor control module, and a battery management system. Each unit is electrically connected via a CAN bus. The vehicle control unit generates coordinated commands based on the vehicle's status. The engine control unit incorporates a fuel adaptation algorithm to solve cold start problems. The methanol fuel supply control module includes sub-modules for injection control, pipeline monitoring, injection adjustment, intake control, and fuel formulation adaptation, adapting to different specifications of methanol fuel. The PO motor control module can switch operating modes and implement heat dissipation protection. The battery management system monitors battery status and ensures safety. This system achieves efficient coordination between methanol fuel and the hybrid system, improving cold start performance, operating efficiency and reliability, reducing fuel consumption and carbon emissions, and combining environmental friendliness and economy.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle control system technology, and in particular relates to an intelligent control module for an electric vehicle power system. Background Technology

[0002] With the development of the new energy vehicle industry, hybrid vehicles have become an important development direction due to their combination of power and energy-saving advantages. Traditional fuel hybrid vehicles rely on gasoline / diesel fuels, resulting in high fuel consumption and large carbon emissions; while methanol fuel has the characteristics of good environmental protection, low cost, and moderate energy density, making it an ideal choice for hybrid vehicle fuel.

[0003] However, methanol fuel faces several technical bottlenecks in hybrid vehicle applications: First, methanol has a high ignition point and a large latent heat of vaporization, which can lead to poor fuel atomization and ignition difficulties during cold starts. Second, in existing hybrid systems, the supply of methanol fuel, engine operation, and electric motor power output lack coordinated control, which can easily lead to power distribution imbalances and reduce overall vehicle operating efficiency. Third, the battery state of charge is poorly matched with the motor operating mode and fuel supply, and there is a lack of dynamic parameter adjustment mechanisms for methanol fuel characteristics, resulting in insufficient system stability. Fourth, differences in methanol fuel purity and additive content can affect fuel supply accuracy, and existing systems lack adaptive adjustment functions.

[0004] Therefore, there is an urgent need for a vehicle control system that can solve the above problems and achieve efficient coordination between methanol fuel and hybrid systems, so as to improve the starting performance, operating efficiency and stability of methanol hybrid vehicles. Summary of the Invention

[0005] This utility model provides an intelligent control module for the power system of an electric vehicle, which aims to solve the technical problems of existing methanol fuel hybrid vehicles, such as difficulty in cold starting, poor coordination between fuel supply and power system, unstable matching between battery and power, and insufficient fuel adaptability, so as to achieve efficient and coordinated control of the system and improve the performance and reliability of the whole vehicle.

[0006] This utility model achieves the above objectives through the following technical solutions: including an engine control unit, a methanol fuel supply control module, a PO motor control module, a battery management system, and a vehicle control unit;

[0007] The engine control unit is electrically connected to the methanol fuel supply control module and the PO motor control module; the battery management system is electrically connected to the PO motor control module and the vehicle control unit; the vehicle control unit is also electrically connected to the engine control unit and the methanol fuel supply control module.

[0008] The vehicle control unit is used to generate coordinated control commands based on the vehicle's driving status, driver operation, and battery state of charge.

[0009] The engine control unit adjusts the engine operating parameters according to the instructions;

[0010] The methanol fuel supply control module controls the supply of methanol fuel according to the instructions and engine operating conditions.

[0011] The P0 motor control module switches the working mode of the P0 motor according to the instruction;

[0012] The battery management system is used to monitor the battery status and feed it back to the vehicle control unit, and control the charging and discharging of the battery according to instructions.

[0013] Furthermore, the methanol fuel supply control module includes an injector control submodule, a pipeline monitoring submodule, and an injection adjustment submodule, which are used to control the opening and closing of the injectors, monitor the status of the fuel pipeline, and adjust the fuel injection quantity and timing, respectively.

[0014] Furthermore, the methanol fuel supply control module also includes an intake system control module connected to the engine control unit, used to collect intake parameters and control the premixing device to adjust the mixture ratio.

[0015] Furthermore, the engine control unit incorporates a fuel adaptation algorithm to increase the fuel injection quantity and delay ignition during cold starts, and to increase injection pressure under high loads.

[0016] Furthermore, the P0 motor control module switches the motor operating mode according to the battery SOC and vehicle commands, prioritizing driving the vehicle during startup, providing auxiliary power during acceleration, and recovering energy during braking.

[0017] Furthermore, the battery management system includes state monitoring, charge / discharge control, and safety protection submodules, which are used to collect battery parameters, control the charge / discharge process, and disconnect the circuit in case of abnormalities.

[0018] Furthermore, the vehicle control unit has a built-in optimization module for dynamically adjusting the engine fuel injection strategy, electric motor power distribution, and fuel injection parameters based on performance test data.

[0019] Furthermore, the methanol fuel supply control module also includes a formulation adaptation submodule, used to adjust the injection control parameters according to the methanol mixing ratio and additive content.

[0020] Furthermore, the P0 motor control module also includes a heat dissipation control submodule, which is used to monitor the motor temperature and control the operation of the heat dissipation device.

[0021] Beneficial effects: This utility model is reasonably designed and has the following beneficial effects:

[0022] 1. In this utility model solution, the fuel matching algorithm of the engine control unit effectively improves the problem of poor atomization of methanol fuel during cold start by increasing the amount of fuel injected and delaying ignition, thereby increasing the success rate of cold start;

[0023] 2. In this utility model solution, the vehicle control unit realizes global coordination of fuel supply, engine, motor and battery, improves coordination efficiency, shortens acceleration response time and reduces overall fuel consumption;

[0024] 3. In this utility model solution, the formula adaptation submodule of the methanol fuel supply control module can adapt to methanol fuels of different purities and different additive contents, without the need for manual parameter adjustment, and has a wide range of applications.

[0025] 4. In this utility model solution, the heat dissipation control submodule of the P0 motor and the safety protection submodule of the battery management system have high reliability, effectively avoiding motor overheating and abnormal battery damage, and reducing the system failure rate.

[0026] 5. In this utility model, methanol fuel is used, which reduces carbon emissions and fuel costs compared to traditional fuel hybrid vehicles, and has both environmental and economic advantages. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the system of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0029] Combination Figure 1 The diagram shows an intelligent control module for an electric vehicle powertrain. This system includes an engine control unit, a methanol fuel supply control module, a P0 motor control module, a battery management system, and a vehicle control unit. All units are electrically connected via a CAN bus to ensure real-time data transmission and synchronized command execution.

[0030] Vehicle control unit: As the core of the system, it collects real-time vehicle driving status, such as vehicle speed, driving conditions, throttle / brake signals and battery SOC status, generates collaborative control commands, and sends them to the engine control unit, methanol fuel supply control module, P0 motor control module and battery management system to achieve global collaborative control; it also has a built-in optimization module that dynamically adjusts the engine fuel injection strategy, motor power distribution ratio and fuel injection parameters based on vehicle performance test data, such as fuel consumption and power response speed.

[0031] Engine Control Unit: Receives commands from the vehicle control unit and adjusts operating parameters such as engine speed and ignition advance angle; it has a built-in fuel adaptation algorithm that, based on the characteristics of methanol fuel, increases the fuel injection quantity by 15%-25% and delays ignition by 5-10ms during cold starts to solve the problem of poor atomization during cold starts; and increases the injection pressure to 12-15MPa under high load, i.e., engine load >70%, to ensure complete fuel combustion.

[0032] Methanol fuel supply control module:

[0033] Includes an injector control submodule: controls the injector opening and closing via PWM signal with an accuracy of ±0.5ms to ensure accurate fuel injection;

[0034] The pipeline monitoring submodule monitors the pressure and temperature of the fuel pipeline through a pressure sensor with a range of 0-20MPa and a temperature sensor with a range of -40℃-120℃. When an abnormality occurs, it sends an alarm signal to the vehicle control unit.

[0035] Injection regulation submodule: Adjusts the fuel injection quantity according to engine operating conditions, keeping it within the range of 5-50 mg / cycle, and adjusts the injection timing;

[0036] Intake system control module: collects intake air volume and intake air temperature, controls the premixing device to adjust the ratio of methanol to air, with a standard air-fuel ratio of 14-16:1;

[0037] Formula adaptation submodule: Based on the methanol mixing ratio, such as 90% or 95% purity, and the additive content, such as 0.5%-2% corrosion inhibitor, it automatically adjusts the injection pressure, injection volume and other control parameters to adapt to different specifications of methanol fuel.

[0038] P0 motor control module: Receives commands from the vehicle control unit and switches the motor operating mode according to the battery SOC: When SOC > 30%, it prioritizes driving the vehicle during startup, outputting torque of 10-30 N·m; during acceleration, it provides auxiliary power, supplementing torque of 20-50 N·m; during braking, it switches to generator mode to recover energy, recovering power of 5-15 kW; at the same time, it has a built-in heat dissipation control submodule, which monitors the motor temperature through a temperature sensor. When the temperature > 80℃, the air cooling device is activated, and when the temperature > 100℃, the load reduction protection is triggered to avoid overheating and damage to the motor.

[0039] The battery management system includes a status monitoring submodule, which collects battery voltage, current, and temperature data with accuracies of ±0.05V, ±0.1A, and ±1℃, respectively; a charge / discharge control submodule, which controls the battery charge / discharge current between 5-20A and maintains the SOC between 20%-80% to prevent overcharging and over-discharging; and a safety protection submodule, which cuts off the battery circuit within 100ms when abnormalities such as overvoltage, overcurrent, or high temperature are detected to ensure battery safety. Simultaneously, it feeds back battery status data to the vehicle control unit in real time, providing a basis for coordinated control. Example

[0040] 1. Cold start condition (ambient temperature < 5℃):

[0041] When the driver starts the vehicle, the vehicle control unit collects the battery SOC (if SOC > 20%) and ambient temperature, and generates a cold start coordination command.

[0042] The engine control unit receives the command and activates the fuel adaptation algorithm: the fuel injection quantity is increased by 20%, and the ignition delay is 8ms.

[0043] Methanol fuel supply control module: The injector control submodule controls the high-frequency opening and closing of the injectors (frequency 100Hz), the injection adjustment submodule sets the injection pressure to 8MPa, and the intake system control module adjusts the premixing device to make the air-fuel ratio of the mixture 15:1.

[0044] P0 motor control module: Drives the motor to output 20 N·m of torque to assist in engine starting; after successful starting, the motor switches to idle speed power generation mode to charge the battery.

[0045] 2. Acceleration condition (throttle opening > 50%):

[0046] The vehicle control unit collects vehicle speed (<80km / h), engine load (>60%), and battery SOC (>30%), and generates acceleration coordination commands;

[0047] Engine control unit: Increase engine speed to 3000 rpm and adjust ignition advance angle to 15°CA;

[0048] Methanol fuel supply control module: injection pressure increased to 14MPa, injection quantity increased to 40mg / cycle, intake system control module adjusts air-fuel ratio to 14:1;

[0049] P0 motor control module: outputs 40 N·m of auxiliary torque to work with the engine to improve power;

[0050] Battery Management System: Controls the battery discharge current of 15A to provide power to the motor, and simultaneously feeds back the State of Charge (SOC) to the vehicle control unit in real time.

[0051] 3. Braking conditions (brake pedal opening > 30%):

[0052] The vehicle control unit collects braking signals and vehicle speed (>20km / h) and generates energy recovery commands.

[0053] P0 motor control module: Switches to power generation mode, recovers 10kW of power, and transfers electrical energy to the battery;

[0054] Battery Management System: Controls battery charging current to 12A, maintaining SOC below 80%; if SOC reaches 80%, energy recovery stops and the motor switches to no-power mode.

[0055] 4. Cruise control (vehicle speed 60-100km / h, throttle opening 20%-30%):

[0056] The vehicle control unit collects driving status data, activates the optimization module, and dynamically adjusts parameters based on historical fuel consumption data (such as 6L / 100km) and power response data.

[0057] Engine control unit: Maintain engine speed at 2000 rpm, ignition advance angle at 12°CA;

[0058] Methanol fuel supply control module: injection pressure 10MPa, injection quantity 25mg / cycle, air-fuel ratio 16:1;

[0059] P0 motor control module: Dynamically switches according to battery SOC. When SOC < 50%, it starts the power generation mode (recovering 5kW of power), and when SOC > 60%, it stops power generation to reduce power loss.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent control module for an electric vehicle power system, characterized in that: This includes the engine control unit, methanol fuel supply control module, P0 motor control module, battery management system, and vehicle control unit; The engine control unit is electrically connected to the methanol fuel supply control module and the PO motor control module; the battery management system is electrically connected to the PO motor control module and the vehicle control unit; the vehicle control unit is also electrically connected to the engine control unit and the methanol fuel supply control module. The vehicle control unit is used to generate coordinated control commands based on the vehicle's driving status, driver operation, and battery state of charge. The engine control unit adjusts the engine operating parameters according to the instructions; The methanol fuel supply control module controls the supply of methanol fuel according to the instructions and engine operating conditions. The P0 motor control module switches the working mode of the P0 motor according to the instruction; The battery management system is used to monitor the battery status and feed it back to the vehicle control unit, and control the charging and discharging of the battery according to instructions.

2. The intelligent control module for an electric vehicle power system according to claim 1, characterized in that: The methanol fuel supply control module includes an injector control submodule, a pipeline monitoring submodule, and an injection adjustment submodule, which are used to control the opening and closing of the injectors, monitor the status of the fuel pipeline, and adjust the fuel injection quantity and timing, respectively.

3. The intelligent control module for an electric vehicle power system according to claim 2, characterized in that: The methanol fuel supply control module also includes an intake system control module connected to the engine control unit, used to collect intake parameters and control the premixing device to adjust the mixture ratio.

4. The intelligent control module for an electric vehicle power system according to claim 1, characterized in that: The engine control unit incorporates a fuel adaptation algorithm to increase fuel injection quantity and delay ignition during cold starts, and to increase injection pressure under high loads.

5. The intelligent control module for an electric vehicle power system according to claim 1, characterized in that: The P0 motor control module switches the motor operating mode according to the battery SOC and vehicle commands, prioritizing driving the vehicle during startup, providing auxiliary power during acceleration, and recovering energy during braking.

6. The intelligent control module for an electric vehicle power system according to claim 1, characterized in that: The battery management system includes state monitoring, charge / discharge control, and safety protection sub-modules, which are used to collect battery parameters, control the charge / discharge process, and cut off the circuit in case of abnormality.

7. The intelligent control module for an electric vehicle power system according to claim 1, characterized in that: The vehicle control unit has a built-in optimization module for dynamically adjusting the engine injection strategy, electric motor power distribution, and fuel injection parameters based on performance test data.

8. The intelligent control module for an electric vehicle power system according to claim 3, characterized in that: The methanol fuel supply control module also includes a formulation adaptation submodule, which is used to adjust the injection control parameters according to the methanol mixing ratio and additive content.

9. The intelligent control module for an electric vehicle power system according to claim 5, characterized in that: The P0 motor control module also includes a heat dissipation control submodule, which is used to monitor the motor temperature and control the operation of the heat dissipation device.

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