A method and device for monitoring and controlling supercharging based on battery SOC

Abstract

The application discloses a supercharging monitoring control method and device based on battery SOC, wherein when the engine is in supercharging control, the battery SOC of the current vehicle, the engine speed, the required supercharging pressure of the engine and the actual supercharging pressure of the engine are acquired; if the battery SOC is less than a first target value, the target pressure limit value is determined based on the preset pressure limit table according to the battery SOC and the engine speed; and whether to perform the vehicle speed limitation and the power limitation of the engine is determined according to the target pressure limit value, the required supercharging pressure, the actual supercharging pressure and the battery SOC. In this way, the supercharging monitoring and control can be realized under the expected battery SOC, so that the situation of insufficient supercharging can be accurately identified when the battery SOC is low, the engine and the vehicle are protected through the limitation measures, and the driving safety is ensured.

Description

Technical Field

[0001] This invention relates to the field of engine control technology, and in particular to a boost monitoring and control method and device based on battery SOC. Background Technology

[0002] In traditional automobiles, most vehicles are equipped with turbochargers to meet power requirements. When operating the engine using closed-loop turbocharger boost control, the boost control and monitoring are basically achieved by simply comparing the difference between the required boost pressure and the actual boost pressure, or by comparing the threshold deviation between the boost pressure change and the actual boost pressure change, and adjusting the opening of the wastegate valve and throttle valve accordingly.

[0003] In recent years, with the emergence of a new round of technological revolution and industrial transformation, the new energy vehicle industry has entered a stage of accelerated development. After years of continuous efforts, my country's new energy vehicle industry has seen significant improvements in technology, a more complete industrial system, and greatly enhanced corporate competitiveness, presenting a positive situation of "dual improvement" in market size and development quality. New energy vehicles are becoming increasingly popular among mainstream consumers, which in turn brings higher requirements for their development.

[0004] For hybrid vehicles, when the battery charge is low, the engine needs to provide power output. Therefore, the impact of the vehicle's battery charge on boost control and monitoring cannot be ignored. However, most existing boost control and monitoring systems do not take the battery charge level into account. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a boost monitoring and control method and device based on battery SOC, which can more accurately and effectively control and identify the problem and risk of insufficient boost in the boost system.

[0006] According to a first aspect of the present invention, a boost monitoring and control method based on battery SOC is provided, comprising:

[0007] When the engine is under boost control, obtain the current vehicle battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure;

[0008] If the battery SOC is less than the first target value, then the target pressure limit is determined based on the battery SOC, engine speed, and a preset pressure limit table. The pressure limit table is a table showing the relationship between the battery SOC, engine speed, and the target pressure limit.

[0009] Based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC, determine whether to impose vehicle speed limits and engine power limits.

[0010] Optionally, based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC, determine whether to impose vehicle speed limits and engine power limits, including:

[0011] Compare the difference between the demand pressure and the actual pressure with the target pressure limit;

[0012] If the difference is greater than the target pressure limit, the battery SOC is compared with the second target value. Based on the comparison result, it is determined whether to impose vehicle speed limits and engine power limits.

[0013] Optionally, based on the comparison results, determine whether to impose vehicle speed limits and engine power limits, including:

[0014] If the battery SOC is less than the second target value, then vehicle speed and engine power will be limited, where the second target value is less than the first target value.

[0015] Optionally, based on the comparison results, determine whether to impose vehicle speed limits and engine power limits, including:

[0016] If the battery SOC is greater than or equal to the second target value, the current vehicle battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure are reacquired to determine whether to impose vehicle speed limits and engine power limits.

[0017] Optionally, if the difference exceeds the target pressure limit, a fault alarm will be issued.

[0018] Optionally, the method also includes:

[0019] After a fault alarm is issued, the engine will implement open-loop boost control.

[0020] Optionally, before the engine is under boost control, it also includes:

[0021] Obtain the current vehicle's battery SOC, engine load, engine speed, throttle opening, and wheel speed;

[0022] Based on the current battery SOC, engine load, engine speed, throttle opening, and wheel speed of the vehicle, calculate whether the engine is under boost control.

[0023] According to a second aspect of the present invention, a boost monitoring and control device based on battery SOC is provided, comprising:

[0024] The acquisition module is used to acquire the current battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure of the vehicle when the engine is under boost control.

[0025] The calculation module is used to determine the target pressure limit based on the battery SOC and engine speed, and a preset pressure limit table, when the battery SOC is less than the first target value. The pressure limit table is a table showing the relationship between the battery SOC, engine speed and the target pressure limit.

[0026] The limiting module is used to determine whether to limit vehicle speed and engine power based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC.

[0027] According to a third aspect of the present invention, a controller is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the aforementioned boost monitoring and control method based on battery SOC.

[0028] According to a fourth aspect of the present invention, a hybrid vehicle is provided, the hybrid vehicle including a vehicle body, a turbocharger installed in the vehicle body, an engine, a generator and a controller, wherein the controller executes the aforementioned boost monitoring and control method based on battery SOC.

[0029] The above-described one or more technical solutions in the embodiments of this specification have at least the following technical effects:

[0030] This specification provides a boost monitoring and control method and device based on battery SOC. When the engine is under boost control, it acquires the current vehicle battery SOC, engine speed, required boost pressure, and actual boost pressure. If the battery SOC is less than a first target value, a target pressure limit is determined based on the battery SOC, engine speed, and a preset pressure limit table. Based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC, it determines whether to implement vehicle speed limiting and engine power limiting. In this way, boost monitoring and control can be achieved at the expected battery SOC level, ensuring accurate identification of insufficient boost when the battery SOC is low, and protecting the engine and vehicle through limiting measures.

[0031] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference figures denote the same parts throughout the drawings.

[0033] In the attached diagram:

[0034] Figure 1 A flowchart of a boost monitoring and control method based on battery SOC is shown in an embodiment of the present invention.

[0035] Figure 2 A block diagram of a boost monitoring and control device based on battery SOC is shown in an embodiment of the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In traditional vehicle driving, the user presses the accelerator pedal, and the vehicle's power source drives the vehicle to the user's desired speed to fulfill the driving intention. For hybrid vehicles, a map (two-dimensional table) exists, which uses vehicle speed and throttle opening to determine the corresponding output torque of the power source at the current speed and throttle opening. Traditional vehicles have only one power source: the engine. Engine boost control primarily determines the engine's target pressure based on basic information such as current engine speed and load. The actual target pressure is adjusted via an exhaust gas bypass valve, and a boost pressure sensor feeds back the actual boost pressure to the control input. This feedback calculates the current pressure deviation, and the exhaust gas bypass valve is adjusted in real time to reduce the boost pressure deviation and bring the boost control within the target range.

[0041] However, hybrid vehicles include a second power source—the battery. During driving, when the battery discharges, the electric motor outputs torque and drives the vehicle along with the engine; when the battery charges, the electric motor recovers energy from braking and converts it into electrical energy. Therefore, the torque required to drive the vehicle is related to the overall energy distribution of the vehicle, specifically how the torque is allocated between the electric motor and the engine. Even under the same operating conditions, different battery SOCs result in different torque distributions between the electric motor and the engine, leading to different target pressure requirements for the engine. Therefore, battery SOC has a direct impact on engine boost control.

[0042] Based on the above, embodiments of the present invention provide a boost monitoring and control method based on battery SOC, combined with... Figure 1 The flowchart shown illustrates that the boost monitoring and control method includes steps 101 to 103:

[0043] Step 101: When the engine is under boost control, obtain the current vehicle battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure;

[0044] In this embodiment, the boost monitoring and control method based on battery SOC is applicable to hybrid vehicles. Hybrid vehicles can be range-extended vehicles or plug-in hybrid vehicles; this embodiment does not limit the specific type.

[0045] The hybrid vehicle includes a vehicle body, an engine installed in the vehicle body, a turbocharger connected to the engine, a generator, and a controller. The controller is connected to the generator, the engine, and the turbocharger, and executes a turbocharger monitoring and control method based on battery SOC according to this embodiment.

[0046] It should be noted that the engine in this embodiment can be a device that provides power to the vehicle, such as the engine in a plug-in hybrid vehicle. The engine in this embodiment can also be a device that charges the battery, such as the engine in a range-extended vehicle. However, regardless of the type of engine, boost control will be implemented when certain operating conditions are met. Furthermore, this embodiment includes the following steps before the engine enters boost control:

[0047] Obtain the current vehicle's battery SOC, engine load, engine speed, throttle opening, and wheel speed;

[0048] Based on the current battery SOC, engine load, engine speed, throttle opening, and wheel speed of the vehicle, calculate whether the engine is under boost control.

[0049] Here, battery SOC refers to the current battery charge of the vehicle. Engine load is the ratio of the engine's output torque to the maximum torque it can output at that speed. Throttle opening refers to the detected opening of the vehicle's accelerator pedal. Wheel speed refers to the vehicle's speed. Based on the above data, power distribution calculations are performed on the engine and generator to determine the engine's required pressure. The engine determines whether to implement boost control based on the control of its intake and exhaust systems. When the engine is under boost control, it is generally considered to be under closed-loop boost control, meaning that boost control is adjusted by comparing the actual boost pressure detected in real time with the required boost pressure.

[0050] When the engine is under boost control, the system acquires the vehicle's current battery SOC, engine speed, required boost pressure, and actual boost pressure. The required boost pressure is calculated, while the actual boost pressure is measured.

[0051] Step 102: If the battery SOC is less than the first target value, then determine the target pressure limit based on the battery SOC, engine speed and a preset pressure limit table. The pressure limit table is a table showing the relationship between battery SOC, engine speed and target pressure limit.

[0052] In this embodiment, after acquiring the aforementioned data, the battery SOC is compared with a first target value, which represents the battery charge level at the start of boost control monitoring. There are two possible comparison results: the battery SOC is greater than or equal to the first target value, or the battery SOC is less than the first target value. When the battery SOC is greater than or equal to the first target value, boost control monitoring is unnecessary. When the battery SOC is less than the first target value, boost control monitoring begins. The purpose of this monitoring is to promptly and accurately identify overpressure and underboost conditions when the battery charge is low. Underboost, in particular, can damage the engine if no action is taken, and the battery SOC will also drop rapidly, potentially causing the vehicle to break down.

[0053] When the battery SOC is less than the first target value, a preset pressure limit table needs to be consulted to determine the target pressure limit corresponding to the current battery SOC and engine speed. In this embodiment, the target pressure limit mainly refers to the pressure limit corresponding to insufficient boost.

[0054] It should be noted that different battery SOCs and different engine speeds correspond to different target pressure limits. These must be determined by consulting a table based on specific operating conditions. The pressure limit table is obtained through extensive calibration tests and is preset in the controller. It can be retrieved when needed during method execution.

[0055] Step 103: Based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC, determine whether to impose vehicle speed limits and engine power limits.

[0056] In this embodiment, after determining the target pressure limit, the difference between the required boost pressure and the actual boost pressure is calculated, and this difference is compared with the target pressure limit to determine whether there is insufficient engine boost.

[0057] If the engine experiences insufficient boost pressure when all components are functioning correctly, it indicates that the actual boost pressure is significantly lower than the required boost pressure. The actual boost pressure is provided by the turbocharger. The exhaust gases from the engine drive the turbine blades, compressing the air and forcing it into the engine. Increasing the opening of the exhaust bypass valve allows more exhaust gas to enter the turbocharger, thus increasing the actual boost pressure provided by the turbocharger. It's important to note that the actual boost pressure a turbocharger can provide is limited. When the actual boost pressure provided by the turbocharger cannot meet the required boost pressure, and the difference between the two is significant, it results in insufficient engine boost. Conversely, if the actual boost pressure exceeds the required boost pressure by a large margin, it indicates engine overpressure.

[0058] For engines, insufficient boost during turbocharging closed-loop control can damage the engine. For vehicles, insufficient engine boost means the engine cannot provide the allocated power, requiring the electric motor to output more power, which causes a rapid drop in battery charge. In this situation, if the battery charge is high, such as 60% or 85% of the vehicle's current state of charge (SOC), it won't significantly impact driving. However, if the battery charge is low, such as 30%, 15%, or even lower, the SOC will drop rapidly, potentially causing the vehicle to break down and severely affecting driving.

[0059] Based on the above, this embodiment determines whether to implement restrictive measures on the vehicle according to the target pressure limit, required boost pressure, actual boost pressure, and battery SOC. Restrictive measures include vehicle speed limits and engine power limits. Battery SOC is an important energy indicator for current hybrid vehicles, a key quantity reflecting the vehicle's current electric range. By combining battery charge monitoring with boost control, different levels and degrees of engine boost underpressure can be accurately identified. This effectively detects underpressure under extreme conditions, allowing for targeted monitoring and control of boost, reducing long-term low charging efficiency, rapid SOC drop, and even vehicle breakdowns caused by underpressure, thus improving system reliability.

[0060] In one alternative implementation, determining whether to impose vehicle speed limits and engine power limits based on target pressure limits, required boost pressure, actual boost pressure, and battery SOC may include:

[0061] Compare the difference between the demand pressure and the actual pressure with the target pressure limit;

[0062] If the difference is greater than the target pressure limit, the battery SOC is compared with the second target value. Based on the comparison result, it is determined whether to impose vehicle speed limits and engine power limits.

[0063] In this embodiment, the difference between the required boost pressure and the actual boost pressure is first calculated. If the actual boost pressure is less than the required boost pressure, and the difference is greater than the target pressure limit, the engine is considered to have insufficient boost. Optionally, a fault alarm can be issued at this time to inform the user of the insufficient engine boost, allowing the user to reduce speed by decreasing the accelerator pedal opening. After the fault alarm is issued, the engine boost control switches from closed-loop to open-loop boost control.

[0064] In another optional implementation, this embodiment compares the battery SOC with a second target value, and there are two comparison results: one is that the battery SOC is less than the second target value, and the other is that the battery SOC is greater than or equal to the second target value. The second target value is a standard characterizing whether the battery charge has reached an extremely low level. In this embodiment, the second target value can be within the range of 15%-30%, and this embodiment does not limit it.

[0065] In one scenario, if the battery SOC is less than a second target value, then vehicle speed and engine power will be limited, where the second target value is less than the first target value.

[0066] In other words, when the battery SOC is detected to be lower than the second target value, it indicates that the battery charge is relatively low, and it is not advisable to increase the motor's output power to maintain the user's desired vehicle speed. Otherwise, it would lead to rapid battery depletion or even vehicle breakdown. To avoid the aforementioned dangerous situation, this embodiment will limit the vehicle speed and / or engine power when the battery SOC is lower than the second target value. Simply put, it reduces the vehicle speed and reduces the engine power.

[0067] It should be noted that the second target value is lower than the first target value. The first target value represents the battery charge level at which underboost monitoring begins. Underboost monitoring starts when the battery SOC is lower than the first target value, but even if underboost is detected, limiting measures may not necessarily be taken; it is also necessary to check if the battery SOC is lower than the second target value. The second target value represents the battery charge level at which limiting measures are taken when underboost is detected.

[0068] In another scenario, if the battery SOC is greater than or equal to the second target value, it indicates that the battery charge is not very low. In this case, no limiting measures are needed. Even if the motor output power increases, the battery can maintain the vehicle's state for a certain period of time. The controller only needs to continue periodically monitoring the engine boost control, that is, re-acquiring the current vehicle battery SOC, engine speed, engine required boost pressure, and actual engine boost pressure to determine whether to implement vehicle speed limiting and engine power limiting.

[0069] In summary, the boost monitoring and control method based on battery SOC provided in this specification acquires the current vehicle battery SOC, engine speed, required boost pressure, and actual boost pressure when the engine is under boost control. If the battery SOC is less than a first target value, a target pressure limit is determined based on the battery SOC, engine speed, and a preset pressure limit table. Based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC, it is determined whether to implement vehicle speed limiting and engine power limiting. In this way, boost monitoring and control can be achieved under the expected battery SOC, ensuring accurate identification of insufficient boost when the battery SOC is low, and protecting the engine and vehicle through limiting measures to guarantee driving safety.

[0070] Based on the same inventive concept, combined with Figure 2 As shown, this embodiment of the invention also provides a boost monitoring and control device based on battery SOC, including: an acquisition module, a calculation module, and a limiting module.

[0071] The acquisition module is used to acquire the current battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure of the vehicle when the engine is under boost control.

[0072] The calculation module is used to determine the target pressure limit based on the battery SOC and engine speed, and a preset pressure limit table, when the battery SOC is less than the first target value. The pressure limit table is a table showing the relationship between the battery SOC, engine speed and the target pressure limit.

[0073] The limiting module is used to determine whether to limit vehicle speed and engine power based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC.

[0074] In one alternative implementation, the limiting module is further configured to:

[0075] Compare the difference between the demand pressure and the actual pressure with the target pressure limit;

[0076] If the difference is greater than the target pressure limit, the battery SOC is compared with the second target value, and based on the comparison result, it is determined whether to limit the engine power.

[0077] In one alternative implementation, the limiting module is further configured to:

[0078] If the battery SOC is less than the second target value, the engine power is limited, where the second target value is less than the first target value.

[0079] In one alternative implementation, the limiting module is further configured to:

[0080] If the battery SOC is greater than or equal to the second target value, the current vehicle battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure are reacquired to determine whether to impose vehicle speed limits and engine power limits.

[0081] In one alternative implementation, the limiting module is further configured to:

[0082] If the difference exceeds the target pressure limit, a fault alarm will be issued.

[0083] In one alternative implementation, the limiting module is further configured to:

[0084] After a fault alarm is issued, the engine will implement open-loop boost control.

[0085] In one alternative implementation, the acquisition module is further configured to:

[0086] Obtain the current vehicle's battery SOC, engine load, engine speed, throttle opening, and wheel speed;

[0087] Based on the current battery SOC, engine load, engine speed, throttle opening, and wheel speed of the vehicle, calculate whether the engine is under boost control.

[0088] In summary, the boost monitoring and control device based on battery SOC provided in this specification acquires the current vehicle battery SOC, engine speed, required boost pressure, and actual boost pressure when the engine is under boost control. If the battery SOC is less than a first target value, a target pressure limit is determined based on the battery SOC, engine speed, and a preset pressure limit table. Based on the target pressure limit, required boost pressure, actual boost pressure, and battery SOC, it is determined whether to implement vehicle speed limiting and engine power limiting. In this way, boost monitoring and control can be achieved under the expected battery SOC, ensuring accurate identification of insufficient boost when the battery SOC is low, and protecting the engine and vehicle through limiting measures to guarantee driving safety.

[0089] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the boost monitoring and control device based on battery SOC described above can be referred to the corresponding process in the aforementioned method, and will not be elaborated further here.

[0090] According to a third aspect of the present invention, a controller is provided, the controller including a boost monitoring and control device based on battery SOC, a memory, a processor and a communication unit, the memory storing machine-readable instructions executable by the processor, and when the controller is running, the processor and the memory communicate via a bus, the processor executes the machine-readable instructions and executes the boost monitoring and control method based on battery SOC.

[0091] The memory, processor, and communication unit are electrically connected directly or indirectly to achieve signal transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The boost monitoring and control device based on battery SOC includes at least one software function module that can be stored in the memory in the form of software or firmware. The processor is used to execute the executable module stored in the memory (e.g., the software function module or computer program included in the boost monitoring and control device based on battery SOC).

[0092] The memory can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc.

[0093] In some embodiments, the processor is used to perform one or more functions described in this embodiment. In some embodiments, the processor may include one or more processing cores (e.g., a single-core processor (S) or a multi-core processor (S)).

[0094] In this embodiment, the memory is used to store the program, and the processor is used to execute the program after receiving the execution instruction. The process definition method disclosed in any implementation of this embodiment can be applied to the processor, or implemented by the processor.

[0095] The communication unit is used to establish communication connections between the controller and other devices via the network, and to send and receive data via the network.

[0096] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the controller described above can be referred to the corresponding process in the aforementioned method, and will not be elaborated further here.

[0097] According to a fourth aspect of the present invention, a hybrid vehicle is provided, which may be a range-extended vehicle or a plug-in hybrid vehicle, and this embodiment does not limit the type of hybrid vehicle.

[0098] The hybrid vehicle includes a vehicle body, an engine installed in the vehicle body, a turbocharger connected to the engine, a generator, and a controller. The controller is connected to the generator, the engine, and the turbocharger. The controller executes a turbocharger monitoring and control method based on battery SOC according to this embodiment. The specific content of the method is as described above and will not be repeated in this embodiment.

[0099] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the vehicle controller described above can be referred to the corresponding process in the aforementioned method, and will not be elaborated further here.

[0100] The above are merely various embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A boost monitoring and control method based on battery SOC, characterized in that, include: When the engine is under boost control, obtain the current vehicle battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure; If the battery SOC is less than the first target value, then based on the battery SOC and the engine speed, and on a preset pressure limit table, a target pressure limit is determined, wherein the pressure limit table is a table showing the relationship between battery SOC, engine speed and target pressure limit. Based on the target pressure limit, the required boost pressure, the actual boost pressure, and the battery SOC, determine whether to impose vehicle speed limits and engine power limits; The step of determining whether to impose vehicle speed limits and engine power limits based on the target pressure limit, the required boost pressure, the actual boost pressure, and the battery SOC includes: Compare the difference between the required boost pressure and the actual boost pressure with the target pressure limit; If the difference is greater than the target pressure limit, the battery SOC is compared with the second target value, and based on the comparison result, it is determined whether to impose a vehicle speed limit and an engine power limit. The second target value is less than the first target value.

2. The method according to claim 1, characterized in that, The step of determining whether to impose a vehicle speed limit and an engine power limit based on the comparison results includes: If the battery SOC is less than the second target value, then the vehicle speed and the engine power will be limited.

3. The method according to claim 1, characterized in that, The step of determining whether to impose a vehicle speed limit and an engine power limit based on the comparison results includes: If the battery SOC is greater than or equal to the second target value, the current vehicle battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure are reacquired to determine whether to impose vehicle speed limits and engine power limits.

4. The method according to claim 1, characterized in that, If the difference is greater than the target pressure limit, a fault alarm will be issued.

5. The method according to claim 4, characterized in that, The method further includes: After issuing a fault alarm, the engine is controlled to perform open-loop boost control.

6. The method according to claim 1, characterized in that, Before the engine is under boost control, it also includes: Obtain the current vehicle's battery SOC, engine load, engine speed, throttle opening, and wheel speed; Based on the obtained current vehicle battery SOC, engine load, engine speed, throttle opening, and wheel speed, calculate whether the engine is under boost control.

7. A boost monitoring and control device based on battery SOC, characterized in that, include: The acquisition module is used to acquire the current battery SOC, engine speed, engine required boost pressure, and engine actual boost pressure of the vehicle when the engine is under boost control. The calculation module is used to determine a target pressure limit based on the battery SOC and the engine speed, and a preset pressure limit table, when the battery SOC is less than a first target value. The pressure limit table is a table showing the relationship between battery SOC, engine speed and target pressure limit. The limiting module is used to determine whether to limit the vehicle speed and the engine power based on the target pressure limit, the required boost pressure, the actual boost pressure and the battery SOC. The limiting module is further configured to: compare the difference between the required boost pressure and the actual boost pressure with the target pressure limit; if the difference is greater than the target pressure limit, compare the battery SOC with a second target value, and determine whether to limit the vehicle speed and the engine power based on the comparison result; wherein the second target value is less than the first target value.

8. A controller, characterized in that, The controller includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the boost monitoring and control method based on battery SOC as described in any one of claims 1-6.

9. A hybrid vehicle, characterized in that, The hybrid vehicle includes a vehicle body, a turbocharger installed in the vehicle body, an engine, a generator, and a controller, wherein the controller executes the boost monitoring and control method based on battery SOC as described in any one of claims 1-6.

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