A high voltage accessory system and control method for a p2 architecture vehicle

Abstract

This invention provides a high-voltage accessory system and control method for P2 architecture vehicles, relating to the field of P2 architecture hybrid vehicle technology. The system includes: an engine, a high-voltage power battery, a generator, a DC-DC module, a high-voltage power steering pump, a 24V low-voltage battery, and a vehicle controller. The engine is connected to the generator via a pulley. The high-voltage power battery is connected to the DC-DC module, a high-voltage air pump, and the high-voltage power steering pump. When the vehicle controller detects that the 24V low-voltage battery charge is below a preset value, it controls the engine to drive the generator to charge the 24V low-voltage battery. While maintaining the balance of the low-voltage battery charge and the power consumption of the onboard low-voltage accessories, this system can significantly improve the overall vehicle's power efficiency. Furthermore, through reasonable control by the vehicle controller, energy consumption can be minimized while meeting normal operating requirements.

Description

Technical Field

[0001] This invention relates to the field of P2 architecture hybrid vehicle technology, and in particular to a high-voltage accessory system and control method for a P2 architecture vehicle. Background Technology

[0002] P2 architecture hybrid vehicles are based on the powertrain of traditional fuel vehicles, with the addition of an electric motor between the clutch and the transmission. The powertrain of traditional fuel vehicles consists of an engine, clutch, transmission, etc.

[0003] Traditional gasoline vehicles' steering pump, air compressor, and generator are driven by the engine, using a P2 parallel architecture. They primarily operate in three modes: pure electric mode, engine mode, and hybrid mode. In pure electric mode, the engine may idle or stop, leaving the traditional steering pump, air compressor, and generator without a driving source. Existing technical solutions, such as CN109080560A—a control system and method for a DC-DC module in a pure electric vehicle—include: a power battery and its management system, an electric motor and its controller, a vehicle controller, a DC-DC module converter, a 12V low-voltage battery, a low-voltage power management unit, a low-voltage load, and a CAN bus. The control method comprises six steps: 1. Vehicle power-on, VCU wake-up; 2. Determining if the vehicle's DC-DC module is enabled; 3. Entering the DC-DC module output voltage control state machine; 4. DC-DC module output voltage control; 5. DC-DC module control voltage gradient processing; 6. The DC-DC module receives control commands from the VCU. This technical solution enables low-voltage battery charging / discharging or charge maintenance.

[0004] However, this technical solution cannot achieve intelligent control by integrating high-pressure components such as the high-pressure oil pump, high-pressure air pressure, and DC-DC module with the P2 architecture. In other words, how to rationally control the high-pressure and low-pressure accessories of P2 architecture vehicles at the system level, so that the system can ensure the normal functioning of the entire vehicle while minimizing overall energy consumption, is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] This invention provides a high-voltage accessory system for P2 architecture vehicles, which can ensure the normal functioning of the vehicle while minimizing the vehicle's energy consumption.

[0006] The system includes: engine, high-voltage power battery, generator, DC-DC module, high-voltage power steering pump, 24V low-voltage battery and vehicle controller;

[0007] The engine is connected to the generator via a pulley;

[0008] The high-voltage power battery is connected to the DC-DC module, the high-voltage air pump, and the high-voltage power steering pump, respectively.

[0009] When the vehicle controller detects that the 24V low-voltage battery charge is lower than the preset value, the vehicle controller controls the engine to drive the generator to charge the 24V low-voltage battery.

[0010] It should be further noted that when the vehicle controller detects that the voltage of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the DC-DC module to convert the high-voltage power output from the high-voltage power battery into low-voltage power to charge the 24V low-voltage battery.

[0011] It should be further noted that this also includes: air compressor, multi-function controller and high-pressure air pump;

[0012] The engine is connected to the air compressor via a belt. When the engine is running, the air compressor is driven by the belt to provide compressed gas to the vehicle's air system.

[0013] When the preset air supply start-up conditions are met, the vehicle controller sends a control command to the multi-function controller to control the high-pressure air pump to provide compressed gas to the vehicle's air circuit.

[0014] It should also be noted that this includes: a low-pressure power steering pump;

[0015] The engine is connected to the gear on the low-pressure power steering pump through gear meshing, thereby driving the low-pressure power steering pump to operate;

[0016] When the preset hydraulic pressure start-up conditions are met, the vehicle controller sends a control command to the multi-function controller, which then controls the high-pressure oil pump to maintain steering pressure in the steering oil circuit.

[0017] It should be further noted that the output interface of the 24V low-voltage battery is connected to the vehicle's low-voltage electrical equipment through the main power supply circuit to supply power to the vehicle's low-voltage electrical equipment.

[0018] A first current sensor is installed on the main power supply circuit. The vehicle controller detects the current information on the main power supply circuit by connecting to the first current sensor. The vehicle controller obtains the power consumption of the vehicle's low-voltage electrical equipment based on the detected current information.

[0019] It should be further noted that it also includes: a second current sensor;

[0020] The second current sensor is installed in the circuit between the generator and the 24V low-voltage battery. The vehicle controller detects the amount of charge given to the 24V low-voltage battery by connecting to the second current sensor.

[0021] This invention discloses a control method for a P2 architecture vehicle, the method comprising:

[0022] The vehicle controller monitors the charge status of the 24V low-voltage battery in real time. When the charge of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the engine to drive the generator to charge the 24V low-voltage battery.

[0023] or / and,

[0024] When the vehicle controller detects that the voltage of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the DC-DC module to convert the high-voltage electricity output from the high-voltage power battery into low-voltage electricity to charge the 24V low-voltage battery.

[0025] It should be further noted that if any of the high-pressure oil pump, high-pressure air pump, or DC-DC module malfunctions, or if the high-pressure power battery falls below a preset threshold, the vehicle controller will keep the engine running without shutting it off.

[0026] Control the engine to drive the generator, low-pressure air pump, and low-pressure oil pump.

[0027] It should be further explained that when the vehicle is started in pure electric mode, the engine is turned off, the high-pressure power steering pump is running, and the pump is adjusted according to the vehicle speed and steering wheel angle. The final power steering control frequency is obtained by multiplying the pump frequency by the pump temperature correction coefficient.

[0028] The high-pressure air pump is controlled to start pumping air when the air pressure is less than the preset threshold a. The pumping frequency is combined with the vehicle's operating conditions to keep the vehicle motor operating in a high-efficiency range. When the air pressure is greater than the preset threshold b (b>a), the pumping frequency is controlled to 0.

[0029] It should be further noted that when the vehicle is running in pure electric mode, the vehicle controller calculates the charge Q of the 24V low-voltage battery:

[0030] The system obtains the amount of charge c from the generator to the 24V low-voltage battery, the amount of charge d from the DC-DC module to the 24V low-voltage battery, and the power consumption y of the low-voltage electrical equipment calculated by the first current sensor.

[0031] (c+d)-y=Q

[0032] If Q is greater than or equal to 0, it means that the charging amount is greater than the power consumption, so the DC-DC module is controlled to stop charging the 24V low-voltage battery.

[0033] If Q is less than 0, then the generator and DC-DC module are controlled to charge the 24V low-voltage battery simultaneously.

[0034] As can be seen from the above technical solutions, the present invention has the following advantages:

[0035] This invention provides an accessory system for P2 architecture vehicles that integrates high and low pressure steering pumps, high and low pressure air pumps, and low pressure battery charging. This invention solves the problem of coordinated control of steering, vehicle system air pumping, and low pressure charging components in P2 parallel hybrid vehicles under different modes and operating conditions. While ensuring that the high pressure oil pump steering drive, low pressure battery multi-point charging mode power supply, and high pressure air compressor air supply meet the normal operation needs of the vehicle, the invention can reduce the vehicle's energy consumption through system-level overall management.

[0036] This invention also continuously monitors the engine, high-voltage power battery, low-voltage power steering pump, air compressor, generator, DC-DC module, high-voltage air pump, high-voltage power steering pump, 24V low-voltage battery, and low-voltage electrical equipment, acquiring operational data and dynamically controlling them based on the status of the 24V low-voltage battery and the operating status of high-voltage accessories. This ensures normal vehicle function while minimizing overall energy consumption. Furthermore, it efficiently collects, stores, and processes status information from the engine, high-voltage power battery, low-voltage power steering pump, air compressor, generator, DC-DC module, high-voltage air pump, high-voltage power steering pump, 24V low-voltage battery, and low-voltage electrical equipment, enabling process monitoring and intelligent vehicle control based on this status information. The system can also promptly detect abnormal states of various components and issue alarms to improve driving safety and reduce driving risks. Attached Figure Description

[0037] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description 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.

[0038] Figure 1 A schematic diagram of the high-voltage accessory system for a P2 architecture vehicle;

[0039] Figure 2 This is a schematic diagram of an embodiment of the high-voltage accessory system for a P2 architecture vehicle. Detailed Implementation

[0040] like Figure 1 The illustrations provided in the high-voltage accessory system of the P2 architecture vehicle provided by this invention are only schematic representations of the basic concept of this invention. Therefore, the drawings only show the modules related to this invention and not the actual number and function of the modules in the actual implementation. In the actual implementation, the function, quantity and role of each module can be arbitrarily changed, and the function and purpose of the modules may also be more complex.

[0041] The high-voltage accessory system in P2 architecture vehicles involves both hardware and software technologies. The hardware aspects of the high-voltage accessory system include components such as the engine, high-voltage power battery, generator, DC-DC module, high-voltage power steering pump, 24V low-voltage battery, vehicle controller, distributed storage, big data processing technology, operating / interaction system, and mechatronics. The software technologies of the high-voltage accessory system mainly include computer vision technology, speech processing technology, natural language processing technology, and machine learning / deep learning.

[0042] The high-voltage accessory system for P2 architecture vehicles involved in this invention utilizes intelligent control technology to coordinate and control the actions of each accessory according to the overall vehicle operating conditions. By using sensor monitoring, data transmission and other technologies, it realizes real-time interactive mapping of data of P2 architecture vehicles, thereby reflecting the operating status of the 24V low-voltage battery and the overall operating status. This can effectively ensure the normal function of the vehicle and minimize the energy consumption of the vehicle.

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0044] Please see Figure 1 and 2 The diagram shown is a schematic of a high-voltage accessory system for a P2 architecture vehicle in a specific embodiment. The system includes: an engine, a high-voltage power battery, a low-voltage power steering pump, an air compressor, a generator, a DC-DC module, a high-voltage air pump, a high-voltage power steering pump, a 24V low-voltage battery, low-voltage electrical equipment, a vehicle controller, and an all-in-one controller.

[0045] The engine is connected to the generator via a pulley; the high-voltage power battery is connected to the DC-DC module, the high-voltage air pump, and the high-voltage power steering pump; when the vehicle controller detects that the 24V low-voltage battery charge is lower than a preset value, the vehicle controller controls the engine to drive the generator to charge the 24V low-voltage battery. In other words, the generator and the high-voltage power battery can charge the 24V low-voltage battery separately, meeting the power supply needs of the 24V low-voltage battery for electrical equipment.

[0046] In this invention, the engine is connected to the air compressor via a belt. When the engine is running, the air compressor is driven by the belt to provide compressed gas to the vehicle's air circuit. When the preset air supply start-up conditions are met, the vehicle controller sends a control command to the multi-function controller to control the high-pressure air pump to work and provide compressed gas to the vehicle's air circuit.

[0047] In this invention, the engine is connected to the gear on the low-pressure power steering pump through gear meshing, thereby driving the low-pressure power steering pump to operate. When the preset oil pressure start-up conditions are met, the vehicle controller sends a control command to the multi-function controller, which controls the high-pressure oil pump to operate, so that the power steering circuit maintains the steering pressure.

[0048] To monitor the power supply circuit and the 24V low-voltage battery's power status, the 24V low-voltage battery's output interface is connected to the vehicle's low-voltage electrical equipment via the main power supply circuit, supplying power to these devices. A first current sensor is installed on the main power supply circuit. The vehicle controller detects the current information on the main power supply circuit by connecting to the first current sensor, and obtains the power consumption of the vehicle's low-voltage electrical equipment based on the detected current information. A second current sensor is installed on the circuit between the alternator and the 24V low-voltage battery. The vehicle controller detects the charging amount to the 24V low-voltage battery by connecting to the second current sensor. This enables monitoring of the power supply status and allows for timely alarm notifications in case of abnormalities.

[0049] This invention continuously monitors and acquires operational data from the engine, high-voltage power battery, low-voltage power steering pump, air compressor, generator, DC-DC module, high-voltage air pump, high-voltage power steering pump, 24V low-voltage battery, and low-voltage electrical equipment. Based on the status of the 24V low-voltage battery and the operating status of high-voltage accessories, it performs dynamic control, ensuring normal vehicle function while minimizing overall energy consumption. It also efficiently collects, stores, and processes status information from the engine, high-voltage power battery, low-voltage power steering pump, air compressor, generator, DC-DC module, high-voltage air pump, high-voltage power steering pump, 24V low-voltage battery, and low-voltage electrical equipment. This status information enables process monitoring and intelligent vehicle control. Furthermore, the system can promptly detect abnormal states of various components and issue alarms to improve driving safety and reduce driving risks.

[0050] The following are embodiments of the control method for P2 architecture vehicles provided in this disclosure. This method belongs to the same inventive concept as the high-voltage accessory system for P2 architecture vehicles in the above embodiments. For details not described in detail in the embodiments of the control method for P2 architecture vehicles, please refer to the embodiments of the high-voltage accessory system for P2 architecture vehicles described above.

[0051] The method includes: the vehicle controller monitors the charge status of the 24V low-voltage battery in real time, and when the charge of the 24V low-voltage battery is lower than a preset value, the vehicle controller controls the engine to drive the generator to charge the 24V low-voltage battery.

[0052] Or / and, when the vehicle controller detects that the voltage of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the DC-DC module to convert the high-voltage power output from the high-voltage power battery into low-voltage power to charge the 24V low-voltage battery.

[0053] In one exemplary embodiment, if any of the high-pressure oil pump, high-pressure air pump, or DC-DC module malfunctions, or if the high-pressure power battery falls below a preset threshold, the vehicle controller keeps the engine running continuously without shutting it off; it also controls the engine to drive the generator, low-pressure air pump, and low-pressure oil pump. This ensures normal vehicle operation even if any of the high-pressure oil pump, high-pressure air pump, or DC-DC module malfunctions.

[0054] In one embodiment of the present invention, when the vehicle is in pure electric mode, the engine is off and the high-pressure oil pump is running. The oil pump operating frequency is adjusted according to the vehicle speed and steering wheel angle. The lower the vehicle speed and the larger the steering wheel angle, the higher the oil pump control frequency output by the vehicle controller to the multi-in-one controller, and vice versa. The oil pump frequency is multiplied by the oil pump temperature correction coefficient to obtain the final oil pump control frequency.

[0055] In pure electric mode, the engine is off, and the high-pressure air pump operates. The operating frequency of the air pump is determined based on the system air pressure from the AIR1 message. When the air pressure is less than a certain threshold 'a', air pumping begins. The air pumping frequency is combined with the overall vehicle operating conditions to ensure that the drive motor operates in the high-efficiency zone. When the air pressure is greater than a certain threshold 'b', the air pumping frequency is 0. Where b>a, the specific values ​​of thresholds b and a can be set according to actual conditions, and the specific values ​​are not limited.

[0056] When the vehicle is in pure electric mode, the vehicle controller calculates the charging amount Q of the 24V low-voltage battery, obtains the charging amount c of the generator to the 24V low-voltage battery, the charging amount d of the DC-DC module to the 24V low-voltage battery, and the power consumption y of the low-voltage electrical equipment calculated by the first current sensor.

[0057] (c+d)-y=Q

[0058] If Q is greater than or equal to 0, it means that the charging amount is greater than the power consumption, so the DC-DC module is controlled to stop charging the 24V low-voltage battery; if Q is less than 0, the generator and DC-DC module are controlled to charge the 24V low-voltage battery simultaneously.

[0059] If the engine is running and not idling, if the load is above the economic zone, and if the 24V low-voltage battery voltage is below the threshold of 27V, the vehicle controller enables the DC-DC module to charge the low-voltage battery, making its voltage greater than 27V, so that the generator stops energizing to charge the low-voltage battery, reducing the engine load and bringing it as close to the economic zone as possible.

[0060] If the high-pressure oil pump or the high-pressure air pump is not present and the system air pressure is below a certain value, or if the DC-DC module is not present and the current of the low-voltage electrical equipment is greater than a certain value or the difference between the power consumption and the charging amount is greater than a certain value, the vehicle controller will control the engine to not shut down via a message.

[0061] Based on the above method, the present invention provides high-voltage components that can be flexibly configured and controlled according to actual needs, and different accessories can be selected to form the components according to different application scenarios; through reasonable control by the vehicle controller, energy consumption can be reduced as much as possible while meeting normal operation requirements.

[0062] The units and algorithm steps of the various examples described in the embodiments of the high-voltage accessory system and control method for P2 architecture vehicles disclosed in this invention can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of function in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0063] The high-voltage accessory system for P2 architecture vehicles illustrates the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the figures. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0064] In the high-voltage accessory system and control method for P2 architecture vehicles disclosed in this invention, computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof. These programming languages ​​include, but are not limited to, object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or power server. In cases involving a remote computer, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (exemplarily using an Internet service provider for Internet connection).

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-voltage accessory system for a P2 architecture vehicle, characterized in that, include: Engine, high-voltage power battery, generator, DC-DC module, high-voltage power steering pump, 24V low-voltage battery and vehicle controller; The system also includes: an air compressor, an all-in-one controller, and a high-pressure air pump; The engine is connected to the generator via a pulley; The high-voltage power battery is connected to the DC-DC module, the high-voltage air pump, and the high-voltage power steering pump, respectively. When the vehicle controller detects that the 24V low-voltage battery charge is lower than the preset value, the vehicle controller controls the engine to drive the generator to charge the 24V low-voltage battery. When the vehicle controller detects that the voltage of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the DC-DC module to convert the high-voltage power output from the high-voltage power battery into low-voltage power to charge the 24V low-voltage battery. The engine is connected to the air compressor via a belt. When the engine is running, the air compressor is driven by the belt to provide compressed gas to the vehicle's air system. When the preset air supply start-up conditions are met, the vehicle controller sends a control command to the multi-in-one controller to control the high-pressure air pump to work and provide compressed gas to the vehicle's air circuit. The system also includes: a low-pressure power steering pump; The engine is connected to the gear on the low-pressure power steering pump through gear meshing, thereby driving the low-pressure power steering pump to operate; When the preset hydraulic pressure start-up conditions are met, the vehicle controller sends a control command to the multi-function controller, which then controls the high-pressure oil pump to maintain steering pressure in the steering oil circuit.

2. The high-voltage accessory system for a P2 architecture vehicle according to claim 1, characterized in that, The output interface of the 24V low-voltage battery is connected to the vehicle's low-voltage electrical equipment through the main power supply circuit to supply power to the vehicle's low-voltage electrical equipment; A first current sensor is installed on the main power supply circuit. The vehicle controller detects the current information on the main power supply circuit by connecting to the first current sensor. The vehicle controller obtains the power consumption of the vehicle's low-voltage electrical equipment based on the detected current information.

3. The high-voltage accessory system for a P2 architecture vehicle according to claim 1, characterized in that, It also includes: a second current sensor; The second current sensor is installed in the circuit between the generator and the 24V low-voltage battery. The vehicle controller detects the amount of charge given to the 24V low-voltage battery by connecting to the second current sensor.

4. A control method for a P2 architecture vehicle, characterized in that, The method employs the high-voltage accessory system of a P2 architecture vehicle as described in any one of claims 1 to 3; The methods include: The vehicle controller monitors the charge status of the 24V low-voltage battery in real time. When the charge of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the engine to drive the generator to charge the 24V low-voltage battery. or / and, When the vehicle controller detects that the voltage of the 24V low-voltage battery is lower than the preset value, the vehicle controller controls the DC-DC module to convert the high-voltage electricity output from the high-voltage power battery into low-voltage electricity to charge the 24V low-voltage battery.

5. The control method for a P2 architecture vehicle according to claim 4, characterized in that, If any of the high-pressure oil pump, high-pressure air pump, or DC-DC module malfunctions, or if the high-pressure power battery falls below a preset threshold, the vehicle controller will keep the engine running without shutting it off. Control the engine to drive the generator, low-pressure air pump, and low-pressure oil pump.

6. The control method for a P2 architecture vehicle according to claim 4, characterized in that, When the vehicle starts in pure electric mode, the engine is turned off, the high-pressure power steering pump operates, and it is adjusted according to the vehicle speed and steering wheel angle; the pump frequency is multiplied by the pump temperature correction coefficient to obtain the final pump control frequency. The high-pressure air pump is controlled to start pumping air when the air pressure is less than the preset threshold a. The pumping frequency is combined with the vehicle's operating conditions to keep the vehicle motor operating in a high-efficiency range. When the air pressure is greater than the preset threshold b (b>a), the pumping frequency is controlled to 0.

7. The control method for a P2 architecture vehicle according to claim 4, characterized in that, When the vehicle starts and operates in pure electric mode, the vehicle controller calculates the charge Q of the 24V low-voltage battery: The system obtains the amount of charge c from the generator to the 24V low-voltage battery, the amount of charge d from the DC-DC module to the 24V low-voltage battery, and the power consumption y of the low-voltage electrical equipment calculated by the first current sensor. (c+d)-y=Q If Q is greater than or equal to 0, it means that the charging amount is greater than the power consumption, so the DC-DC module is controlled to stop charging the 24V low-voltage battery. If Q is less than 0, then the generator and DC-DC module are controlled to charge the 24V low-voltage battery simultaneously.

Images