A power generation system and method based on a vehicle power source

Abstract

The application belongs to the technical field of power generation monitoring and adjustment of automobile power sources, and specifically discloses a power generation system and method based on an automobile power source, which comprises the following steps: converting and dynamically adjusting a driving speed into a generator speed to generate power by a generator, so as to verify a speed box speed regulation error parameter by detecting a speed regulation sensitivity parameter and an accuracy parameter of the speed box; generating a corresponding speed deviation relationship parameter of an energy storage battery overflow electric quantity by verifying the battery overflow electric quantity and the occurrence probability of each electric quantity limitation type of the energy storage battery in the speed box conversion process; and finally, generating a generator safety protection mechanism based on the speed box speed regulation error parameter and the corresponding speed deviation relationship parameter of the energy storage battery overflow electric quantity. The application adjusts and corrects the generator transmission ratio by fusing various battery limitation types, increases the adjustment and control precision, and improves the overall efficiency through multi-module collaborative analysis.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power generation monitoring and regulation of automobile power sources, and relates to a power generation system and method based on automobile power sources. BACKGROUND

[0002] With the rapid development of the automobile industry, hybrid electric vehicles and electric vehicles are gradually becoming an important direction for future transportation. In these vehicles, the efficiency and safety of the energy management system directly determine the performance and user experience of the vehicle. Traditional automobile power source systems usually rely on internal combustion engines or electric motors to work alone, which has low energy conversion efficiency and is prone to energy waste or safety hazards under dynamic working conditions. In order to improve energy utilization efficiency and ensure system safety, there is an urgent need for a power generation system and method that can dynamically adjust the energy conversion process and monitor the system state in real time.

[0003] In the prior art, there are also some related solutions related to power generation monitoring and regulation of automobile power sources. For example, the patent with the patent number CN105691382A discloses a control method, device and system for automobile energy recovery. The method flow includes: judging whether the gearbox has completed the upshift and declutching operation; if yes, controlling the motor to enter the power generation state to convert the kinetic energy of the motor and the gearbox into electrical energy and store it in the battery for standby; monitoring whether the synchronous speed difference of the gearbox is within the preset range; if yes, stopping power generation and controlling the gearbox to perform the gear engagement operation; otherwise, synchronously adjusting the speed of the main power source to make the synchronous speed difference reach the preset range, so that the battery recovers the electrical energy generated by the motor, wherein the main power source is the motor. The energy generated during the upshift process of the gearbox can be stored for the electrical energy required for torque increase after gear shifting is completed, which can increase efficiency and save energy consumption.

[0004] The existing power generation monitoring and regulation scheme of automobile power sources has the following limitations: 1. When regulating the transmission ratio of the generator, the multiple limit types of the battery power are not combined and analyzed, such as only focusing on the overcharge limit of the battery. Different battery limit types may interact with each other, and this single-dimensional regulation method cannot fully reflect the complex situation of the battery in actual operation, making the regulation result lack of accuracy.

[0005] 2. The monitoring method of multiple modules is relatively dispersed, and lacks a cooperative working mechanism among them. For example, the driving speed monitoring module is only responsible for monitoring the driving speed of the vehicle, and does not share data with the gearbox regulation module and the power generation module. Due to the lack of closed-loop control, the system cannot dynamically optimize according to the actual operating conditions. SUMMARY

[0006] In view of this, in order to solve the problems raised in the background art, a power generation system and method based on a vehicle power source are proposed.

[0007] The purpose of the present application can be achieved by the following technical solutions: The present application provides a power generation system based on a vehicle power source, comprising: obtaining the driving speed of the vehicle power source through a power speed monitoring module, converting the driving speed through a gearbox to generate a generator output speed.

[0008] The generation process of the generator output speed includes a gearbox operation monitoring module, an energy storage battery state monitoring module, and a safety decision module:

[0009] The gearbox operation monitoring module is used to detect the continuous running state of the generator output speed to determine the gearbox speed adjustment error parameter.

[0010] The energy storage battery state monitoring module is used to monitor the power state of the energy storage battery to determine the energy storage battery overflow power ratio and obtain each power limit type, and analyze the occurrence probability of each power limit type by constructing a multi-source data fusion monitoring layer.

[0011] The safety decision module is used to establish a generator safety protection mechanism according to the gearbox speed adjustment error parameter, the energy storage battery overflow power ratio, and the occurrence probability of each power limit type, wherein the generator safety protection mechanism includes a gearbox transmission ratio adjustment mechanism and an abnormal feedback mechanism.

[0012] The second aspect of the present application provides a power generation method based on a vehicle power source, comprising: (1) obtaining the driving speed of the vehicle power source, converting the driving speed through a gearbox to generate a generator output speed.

[0013] (2) Detect the continuous running state of the generator output speed to determine the gearbox speed adjustment error parameter.

[0014] (3) Monitor the power state of the energy storage battery to determine the energy storage battery overflow power ratio and obtain each power limit type, and analyze the occurrence probability of each power limit type by constructing a multi-source data fusion monitoring layer.

[0015] (4) According to the gearbox speed adjustment error parameter, the energy storage battery overflow power ratio, and the occurrence probability of each power limit type, establish a generator safety protection mechanism, wherein the generator safety protection mechanism includes a gearbox transmission ratio adjustment mechanism and an abnormal feedback mechanism.

[0016] Compared with the prior art, the present application has the following advantages: 1. The present application adjusts and corrects the generator transmission ratio by fusing multiple battery limiting types, increases the adjustment accuracy, and enriches the battery power abnormality types, avoiding the phenomenon of feedback insensitivity due to battery power abnormality, and reducing the automobile failure rate caused by battery power abnormality.

[0017] 2. The present application integrates driving speed monitoring, gearbox adjustment, power generation and safety analysis through closed-loop control, and improves the overall efficiency through multi-module cooperation. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a schematic diagram of the system module connection of the present application.

[0020] Figure 2 It is a schematic diagram of the method implementation step flow of the present application.

[0021] Figure 3 It is a structure schematic diagram of the multi-source data fusion monitoring layer of the present application.

[0022] Figure 4 It is a schematic diagram of the establishment flow of the generator safety protection mechanism of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Please refer to Figure 1 The present application provides a power generation system based on automobile power source, which comprises: a power speed monitoring module, a gearbox operation monitoring module, an energy storage battery state monitoring module, and a safety decision module.

[0025] The power speed monitoring module is connected with the gearbox operation monitoring module, the energy storage battery state monitoring module and the safety decision module, the gearbox operation monitoring module is connected with the energy storage battery state monitoring module, and the energy storage battery state monitoring module is connected with the safety decision module.

[0026] The driving speed of the automobile power source is obtained by the power speed monitoring module, and the driving speed is converted by the gearbox to generate the generator output speed.

[0027] In an embodiment, the power speed monitoring module further comprises: extracting the driving speed of the automobile power source in real time by a speed sensor.

[0028] The automobile constant speed cruise set speed is obtained, and the theoretical operation transmission ratio of the gearbox is determined according to the driving speed of the automobile power source and the automobile constant speed cruise set speed.

[0029] The driving speed of the automobile power source is converted and controlled by the theoretical operation transmission ratio of the gearbox to generate the generator output speed.

[0030] The transmission ratio refers to the conversion ratio of the input shaft speed generated by the gearbox from the driving speed and the generator output speed. For example, when the automobile travels at a speed of 80 km / h, the speed of the input shaft of the gearbox reaches 2000 r / min (revolutions per minute) through the relationship of the automobile transmission system (such as the combined action of factors such as wheel radius, main reducer transmission ratio, etc.), which means that the input shaft of the gearbox will rotate 2000 times per minute. At this time, the generator output speed connected with the gearbox is 1000 r / min. That is, the output shaft of the generator rotates 1000 times per minute.

[0031] It should be noted that the automobile constant speed cruise set speed determines the expected driving speed of the automobile, and the gearbox shifts gears according to the constant speed cruise set and the actual driving condition to change the transmission ratio. For example, when cruising at a constant speed on a flat road, if the set speed is low, the gearbox will be in a low gear position, and the engine speed may be relatively high at this time to provide sufficient torque to maintain the vehicle speed; if the set speed is high, the gearbox will be shifted to a higher gear position to make the ratio of engine speed to wheel speed more suitable.

[0032] In the above embodiment, the power speed monitoring module further comprises a driving speed energy conversion unit and an energy distribution and utilization unit, and the driving speed energy conversion unit is connected with the energy distribution and utilization unit.

[0033] The driving speed energy conversion unit comprises: in the process of automobile driving, the rotation of the wheels drives the transmission device connected with the wheels to rotate, and the rotor of the generator rotates; according to the principle of electromagnetic induction, the coil inside the generator moves in the magnetic field to cut the magnetic induction lines, thereby generating induced electromotive force and further generating electric energy, realizing the conversion from mechanical energy to electric energy of the driving speed; in this process, the gearbox adjusts the transmission ratio through different gears according to the driving speed of the vehicle to ensure that the generator can operate at the automobile constant speed cruise set speed, thereby efficiently converting mechanical energy into electric energy.

[0034] The energy distribution utilization unit is divided into two parts of driving motor and energy storage battery charging, wherein the driving motor part is to directly use part of the converted electric energy to drive the motor, the motor converts the electric energy into mechanical energy to provide power for the vehicle and drive the vehicle to run, and the energy storage battery charging part is to charge the excess electric energy to the energy storage battery through the power electronic controller when the electric energy generated by the generator exceeds the electric energy required by the motor to drive the vehicle.

[0035] The power electronic controller plays a role of adjusting and controlling the electric energy transmission, can accurately control the charging process according to the parameters such as the electric quantity state, voltage and current of the energy storage battery, and ensure that the energy storage battery can be safely and efficiently charged. For example, when the electric quantity of the energy storage battery is low, the power electronic controller allows a larger charging current to speed up the charging speed, and when the electric quantity of the energy storage battery is close to full charging, the power electronic controller reduces the charging current to prevent the battery from overcharging.

[0036] The application can fully recover the kinetic energy of the vehicle in the running process by converting the running speed into the generator speed through the gearbox, convert the energy that may be wasted into electric energy and store it, improve the overall energy utilization rate of the vehicle, and ensure the safety of the energy storage battery by detecting the battery electric quantity state.

[0037] In the process of running of the automobile, the running speed is converted into the generator speed through the gearbox, and then the electric quantity is generated, and the excess electric quantity is stored in the battery, in order to realize the energy storage limitation and transformation safety monitoring, the following contents can be taken: the generation process of the generator output speed includes a gearbox operation monitoring module, an energy storage battery state monitoring module and a safety decision module: the gearbox operation monitoring module is used for detecting the continuous running state of the generator output speed, so as to determine the gearbox speed adjustment error parameter.

[0038] In the embodiment, the detection of the continuous running state of the generator output speed includes: positioning the actual output speed of the generator in real time through the speed sensor, establishing the actual output speed curve of the generator in the continuous running process of the automobile, and specifically taking the time point as the horizontal coordinate and the actual output speed as the vertical coordinate.

[0039] A reference line is constructed with the generator output speed as a reference value, which is a straight line with the time point as the horizontal coordinate and the generator output speed as the vertical coordinate.

[0040] By comparing the actual output speed curve and the reference line, the continuous running state of the generator output speed is mapped, and the continuous running state includes a smooth state and a rugged state.

[0041] The smooth state indicates that the speed regulation operation of the gearbox meets the expectation of the constant-speed cruise operation of the automobile power source, and the rough state indicates that the speed regulation operation of the gearbox does not meet the expectation of the constant-speed cruise operation of the automobile power source.

[0042] In the above embodiment, the variation trend of the actual output speed curve is determined by comparing the corresponding variation amount of the output speed at different time points in the reference line, and the continuous operation state of the generator output speed is mapped. Specifically, if the actual output speed curve and the reference line always coincide, the continuous operation state of the generator output speed is a smooth state, otherwise, it is a rough state. For example, if the actual output speed curve of the generator in a certain time interval does not coincide with the reference line at two time points, the power operation fluctuation of the generator exists in the time interval, and the continuous operation state of the generator output speed is marked as a rough state.

[0043] In a further embodiment, the determination of the gearbox speed regulation error parameter includes: determining the speed regulation sensitivity parameter of the gearbox by comparing the variation amount of the automobile constant-speed cruise set speed and the actual output speed of the generator at all same times.

[0044] The embodiment of the determination of the speed regulation sensitivity parameter of the gearbox is: setting a suitable time period, for example, 100 ms, obtaining the input shaft speed generated by the driving speed in the time period through the torque monitoring device, calculating the variation amount of the input shaft speed in each time interval and the variation amount of the actual output speed of the generator in each time interval, and defining the sensitivity parameter as the average of the corresponding ratio of the variation amount of the input shaft speed in each time interval to the variation amount of the actual output speed of the generator in the corresponding time interval.

[0045] The variation amount in the time interval is obtained by subtracting the data of adjacent time points in the time period.

[0046] The sensitivity parameter can reflect the response speed of the generator output speed to the change of the constant-speed cruise set speed. The higher the sensitivity is, the faster the response of the generator output speed to the change of the constant-speed cruise set speed is, which means that the small change of the gearbox speed will cause a large change of the generator output speed, and vice versa.

[0047] The speed regulation accuracy parameter of the gearbox is determined by comparing the variation amount of the driving speed of the automobile power source and the actual output speed of the generator at all same times.

[0048] The embodiment of the determination of the speed regulation accuracy parameter of the gearbox is: based on the automobile dynamics principle and the working characteristics of the gearbox and the generator, a theoretical model is established to predict the theoretical value of the generator output speed under the given gearbox output speed and other conditions (such as considering the transmission ratio, mechanical efficiency, etc.) .

[0049] During the time period, the actual output speed of the generator and theoretical value Compare and calculate relative error ,Will Defined as the accuracy parameter, the smaller the error, the closer the generator output speed is to the theoretical value and the higher the accuracy.

[0050] The accuracy parameter can reflect the consistency between the generator output speed and the driving speed. The higher the accuracy, the more consistent the changes in the generator output speed and the driving speed.

[0051] Set the sensitivity parameters and accuracy parameters to correspond to the standard parameters, compare the speed adjustment sensitivity parameters and speed adjustment accuracy parameters of the transmission with the corresponding standard parameters respectively, determine the absolute differences between the sensitivity parameters and accuracy parameters and the corresponding standard parameters, and integrate them into the transmission speed adjustment error parameters.

[0052] The transmission speed regulation error parameter is compared with the preset error threshold. When it exceeds the preset error threshold, abnormal feedback is given; otherwise, the speed regulation error parameter is derived.

[0053] The integration processing can be set to take descriptive statistical values ​​such as average value, maximum value, etc. from the absolute difference between the sensitivity parameter and the accuracy parameter and the corresponding standard parameter, which can be set by the enterprise. For example, the sensitivity parameter corresponds to the standard parameter of 1, the accuracy parameter corresponds to the standard parameter of 0, and the preset error threshold is 0.15. When the sensitivity parameter and the accuracy parameter are 0.8 and 0.15 respectively, the absolute differences between the sensitivity parameter and the accuracy parameter and the corresponding standard parameters are 0.2 and 0.15 respectively. At this time, the gearbox speed adjustment error parameter is 0.2 obtained by integration processing by taking the maximum value, which exceeds the preset error threshold of 0.15, and abnormal feedback is given to the gearbox speed adjustment state.

[0054] In some industrial equipment or construction machinery, abnormal gearbox speed regulation can cause equipment loss of control, component damage, and other issues, posing a threat to the safety of operators and surrounding personnel. Therefore, abnormality feedback is necessary to enable operators to stop equipment operation promptly to prevent accidents.

[0055] The energy storage battery status monitoring module is used to monitor the state of charge (SOC) of the energy storage battery to determine the overflow rate of the energy storage battery and obtain the types of power limits. By building a multi-source data fusion monitoring layer, the occurrence probability of each power limit type is analyzed.

[0056] In an embodiment, the power state of the energy storage battery is monitored to determine the energy storage battery overflow proportion, which includes: collecting the storage proportion of the energy storage battery in real time to determine the power state, when the storage proportion exceeds the preset storage proportion threshold, the battery overflow proportion of the energy storage proportion relative to the preset storage proportion threshold is extracted, that is, the energy storage battery overflow proportion, and the battery energy storage is limited.

[0057] The storage proportion refers to the proportion of the charged capacity of the battery relative to the full capacity of the battery.

[0058] For example, when the storage proportion is 85% and the preset storage proportion threshold is 80%, the exceeding value of the storage proportion relative to the preset storage proportion threshold is defined as the battery overflow proportion, which is 5%.

[0059] Specifically, by monitoring the energy storage battery overflow proportion, the generator output power is limited to achieve the purpose of limiting the battery energy storage, such as: when the energy storage battery overflow proportion is close to the upper limit, the generator output power is gradually reduced, and the excess power is preferentially used to drive the vehicle; when the energy storage battery overflow proportion reaches the upper limit, the charging is completely stopped. By monitoring the power state of the energy storage battery, it is helpful to prevent overcharging of the battery and prolong the service life of the battery.

[0060] In further embodiments, the various power limitation types include a physical limitation type caused by input overload, an indirect limitation type caused by alternating conversion loss, a capacity attenuation limitation type caused by battery aging, and a coordination limitation type in dynamic working conditions.

[0061] In further embodiments, the multi-source data fusion monitoring layer includes: constructing a multi-source data fusion monitoring layer by integrating a sensor network and an algorithm model to realize real-time monitoring and feature extraction of various power limitation types.

[0062] Referring to Figure 3 As shown, the multi-source data fusion monitoring layer includes various sub-layers composed of a physical limitation layer corresponding to input overload, an indirect limitation layer corresponding to alternating conversion loss, a capacity attenuation limitation layer corresponding to battery aging, and a coordination limitation layer corresponding to dynamic working conditions.

[0063] Each sub-layer includes various extracted features mapped to the power limitation type of the corresponding sub-layer.

[0064] Specifically, the integrated sensor network and algorithm model is: through the deployment of multiple sensors to collect real-time multi-source data fusion monitoring layer related data of each sub-layer, such as collecting input current in the physical limit layer or indirect limit layer through the deployment of temperature sensors, collecting battery power state in the capacity attenuation limit layer through the deployment of SOC sensors, and at the same time establishing a related data algorithm system of each sub-layer to calculate the monitoring results, such as establishing a difference algorithm system between the extracted features and the threshold features.

[0065] The physical limit layer includes features such as current instantaneous peak value and voltage instantaneous peak value mapped with physical limit type. When the input current or power exceeds the maximum allowed value of the energy storage battery, the battery cannot fully absorb the input energy, resulting in overflow of battery energy storage and being subject to energy storage limit.

[0066] The indirect limit layer includes features such as rectifier input / output end harmonic distortion rate and AC / DC conversion efficiency mapped with indirect limit type. In the process of converting current from alternating current (AC) to direct current (DC), energy loss due to insufficient rectifier efficiency is an influencing factor of battery energy storage capacity limitation.

[0067] The capacity attenuation limit layer includes features such as battery cycle number and internal resistance growth rate mapped with capacity attenuation limit type. With the increase of battery use time, its capacity gradually attenuates, resulting in the battery being unable to store rated power, thus limiting the battery energy storage capacity.

[0068] The coordination limit layer includes features such as transmission ratio adjustment frequency and deviation rate of battery SOC and driving torque matching degree mapped with coordination limit type. In dynamic working conditions such as vehicle acceleration, deceleration and climbing, the coordination between system components is insufficient, leading to uneven energy distribution, which in turn causes power overflow and limits the battery energy storage capacity.

[0069] The real-time feature extraction of each power limit type is a well-known common sense parameter.

[0070] In further embodiments, the occurrence probability of each power limit type is analyzed by constructing a multi-source data fusion monitoring layer, which includes: obtaining each extracted feature corresponding to each power limit type.

[0071] Setting feature threshold values of each extracted feature in each sub-layer of the multi-source data fusion monitoring layer, identifying the difference between the feature threshold value of each extracted feature in each sub-layer and the corresponding extracted feature of the corresponding monitoring layer , generating mapping parameters of multiple extracted features in each sub-layer through Sigmoid function, which are , wherein represents a preset reference difference, reflects the difference deviation degree of the extraction feature to which the monitoring layer belongs, denotes the number of each sub-layer, , , denotes the number of each extraction feature, , e represents a natural constant, and the Sigmoid function is used to limit the mapping parameter in the range of 0-1 to satisfy the probability of occurrence after the mapping relationship in the range of 0-1. The greater the difference deviation degree, the greater the influence and correlation of the extraction feature in the sub-layer on the mapping parameter, and the greater the probability of occurrence of the power limit type.

[0072] The feature threshold of each extraction feature in each sub-layer and the difference value of the corresponding extraction feature of the corresponding monitoring layer have different positive and negative relationships. For example, for the AC-DC conversion efficiency, the difference value has a positive and negative relationship, that is, when the actual value is higher than the threshold, the final difference value is negative, and when the actual value is lower than the threshold, the final difference value is positive. The specific result relationship is self-set according to a public constant. The mapping parameters of multiple extraction features in each sub-layer are generated by the Sigmoid function as follows:

[0073] Table 1: Sigmoid function calculation data example

[0074]

[0075] The feature threshold of each extraction feature in each sub-layer of the multi-source data fusion monitoring layer is determined by empirical fitting. The empirical fitting threshold is generally determined by a reasonable feature threshold based on a large amount of practical experience, historical data, and the judgment of professional personnel.

[0076] Specifically, the mapping relationship between the feature threshold of each extraction feature in each sub-layer and the corresponding extraction feature of the corresponding monitoring layer refers to the difference value between the feature threshold of each extraction feature in each sub-layer and the corresponding extraction feature of the corresponding monitoring layer, including the current difference value, the AC-DC conversion efficiency difference value, the internal resistance growth rate, the matching deviation rate of the battery SOC and the driving torque, etc. For example, for the current instantaneous peak value in the physical limit layer, the difference value of the current instantaneous peak value excess value relative to the maximum allowed current threshold is detected. For the AC-DC conversion efficiency in the indirect limit layer, the difference value of the AC-DC conversion efficiency relative to the threshold of 80% is detected. For the internal resistance growth rate in the capacity attenuation limit layer, the difference value of the internal resistance growth rate relative to the threshold of 10% is detected. For the matching deviation rate of the battery SOC and the driving torque in the coordination limit layer, the difference value of the matching deviation rate relative to the threshold of 10% is detected.

[0077] According to the one-to-one correspondence between each sub-layer and each power limit type, the mapping parameters of multiple extraction features in each sub-layer are mapped into the occurrence probability of each power limit type.

[0078] The one-to-one correspondence between each sub-layer and each power limit type is specifically: the physical limit layer corresponds to the physical limit type, the indirect limit layer corresponds to the indirect limit type, the capacity attenuation limit layer corresponds to the capacity attenuation limit type, and the coordination limit layer corresponds to the coordination limit layer type. For example, the mapping parameter of the physical limit layer of the multi-extraction feature is equivalent to the occurrence probability of the physical limit type.

[0079] The safety decision module is configured to establish a generator safety protection mechanism according to the gearbox speed regulation error parameter, the energy storage battery overflow power proportion, and the occurrence probability of each power limit type. The generator safety protection mechanism includes a gearbox transmission ratio adjustment mechanism and an abnormal feedback mechanism.

[0080] Please refer to Figure 4 In an embodiment, the establishment of the generator safety protection mechanism according to the gearbox speed regulation error parameter, the energy storage battery overflow power proportion, and the occurrence probability of each power limit type includes: calculating the energy storage battery overflow power proportion corresponding speed deviation relationship parameter according to the energy storage battery overflow power proportion and the occurrence probability of each power limit type. wherein represents the number of each power limit type, , reflects the influence of the corresponding overflow degree of the energy storage battery overflow power when the gearbox speed regulation deviates, and reflects the mechanical error influence of each power limit type when the gearbox speed regulation deviates.

[0081] Specifically, overcharging, high temperature, overcurrent, and battery aging have different occurrence probabilities of power limit. From whether overcharging, temperature influence, current situation, and battery performance degradation, the energy storage battery overflow power proportion data presents different performances in size, fluctuation, and change trend.

[0082] The safety of the energy storage battery is determined, and the safety of the energy storage battery includes safe conditions and unsafe conditions. The energy storage battery overflow power proportion corresponding speed deviation relationship parameter is compared with a preset deviation relationship threshold. If the energy storage battery overflow power proportion corresponding speed deviation relationship parameter exceeds the preset deviation relationship threshold, the safety of the energy storage battery is determined as an unsafe condition.

[0083] Under the unsafe condition of the energy storage battery, the power limit type is taken as the battery abnormal type, and an abnormal feedback mechanism is generated, i.e., the feedback battery abnormal type.

[0084] Under the safe condition of the energy storage battery, the energy storage battery overflow power proportion corresponding speed deviation relationship parameter is obtained, and the gearbox speed regulation error parameter is obtained simultaneously.​​​ determining the transmission ratio adjustment of the gearbox for measuring the transmission ratio adjustment demand of the gearbox under the condition of the overflow battery power ratio and the speed regulation error, wherein represents the preset unit error parameter corresponding to the transmission ratio adjustment demand, which is set by empirical fitting, represents the speed deviation relationship parameter and the preset influence weight of the gearbox speed regulation error parameter, reflecting the different influence degrees of the two parameters in the transmission ratio adjustment, such as generating the gearbox transmission ratio adjustment mechanism, i.e. optimizing the gearbox transmission ratio.

[0085] The gearbox speed regulation error parameter directly reflects the deviation degree of the actual speed of the gearbox from the expected speed. Through the analysis of this parameter, the effect of the gearbox transmission adjustment can be understood in real time, and then the transmission ratio can be accurately adjusted according to the actual demand, so that the speed output by the gearbox is more in line with the requirements of the vehicle driving condition, and the precision and stability of the transmission adjustment are improved.

[0086] The gearbox speed regulation error parameter accurately measures the actual demand of the gearbox, which can keep the system stable under different conditions. For example, during vehicle acceleration, deceleration or climbing, etc., the system can effectively avoid problems such as shaking and impact caused by mismatched transmission, prolong the service life of the gearbox and related parts, and enhance the reliability of the entire power system. These parameters provide a key basis for fault diagnosis of the gearbox. When the overflow battery power ratio is abnormal, and the speed deviation and regulation error exceed the normal range, it is likely that there is a fault in the gearbox or related system. Through continuous monitoring and analysis of these parameters, potential problems can be found in advance, predictive maintenance can be performed, and the probability of equipment failure can be reduced, thereby reducing maintenance costs and downtime.

[0087] The transmission ratio adjustment mechanism is used to ensure the braking effect of the engine during operation to improve braking safety, and the abnormal feedback mechanism of the gearbox is used to prevent excessive energy storage from damaging the battery.

[0088] On the one hand, the present application adjusts and corrects the generator transmission ratio by fusing multiple battery limit types, increases the control precision, and enriches the battery power abnormal type, avoids the phenomenon of insensitive feedback due to battery power abnormality, and reduces the automobile failure rate caused by battery power abnormality.

[0089] On the other hand, the present application integrates driving speed monitoring, gearbox adjustment, power generation and safety analysis through closed-loop control, and multiple modules cooperate to improve the overall efficiency.

[0090] Please refer to Figure 2As shown, the second aspect of the present application provides a power generation method based on a vehicle power source, comprising: (1) obtaining the driving speed of the vehicle power source, converting the driving speed through a gearbox to generate a generator output speed.

[0091] (2) detecting the continuous operation state of the generator output speed to determine the gearbox speed adjustment error parameter.

[0092] (3) monitoring the state of charge of the energy storage battery to determine the overflow proportion of the energy storage battery and obtain each type of charge limit, and analyzing the occurrence probability of each type of charge limit by constructing a multi-source data fusion monitoring layer.

[0093] (4) establishing a generator safety protection mechanism according to the gearbox speed adjustment error parameter, the overflow proportion of the energy storage battery, and the occurrence probability of each type of charge limit, wherein the generator safety protection mechanism comprises a gearbox transmission ratio adjustment mechanism and an abnormal feedback mechanism.

[0094] The above is only an example and description of the concept of the present application. Those skilled in the art can make various modifications, supplements or substitutions to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the concept of the present application or exceed the scope defined by the present application.

Claims

1. A power generation system based on an automobile power source, characterized in that: The system obtains the driving speed of the vehicle power source through the power speed monitoring module, converts the driving speed through the gearbox, and generates the generator output speed; The process of generating the generator output speed includes a gearbox operation monitoring module, an energy storage battery status monitoring module, and a safety decision module: The gearbox operation monitoring module is used to detect the continuous operation state of the generator output speed to determine the gearbox speed adjustment error parameter; The method of determining the transmission speed regulation error parameter includes: determining a transmission speed regulation sensitivity parameter by comparing the amount of change between the vehicle's cruise control set speed and the actual output speed of the generator at all the same times; determining a transmission speed regulation accuracy parameter by comparing the amount of change between the vehicle's power source's driving speed and the actual output speed of the generator at all the same times; setting the sensitivity parameter and the accuracy parameter to correspond to standard parameters, comparing the transmission speed regulation sensitivity parameter and the speed regulation accuracy parameter with the corresponding standard parameters, determining the absolute differences between the sensitivity parameter and the accuracy parameter and the corresponding standard parameters, and integrating them to form a transmission speed regulation error parameter; comparing the transmission speed regulation error parameter with a preset error threshold, and providing abnormal feedback when the error exceeds the preset error threshold, otherwise deriving the speed regulation error parameter; The energy storage battery status monitoring module is used to monitor the power status of the energy storage battery to determine the overflow power ratio of the energy storage battery and obtain the various power limit types. By building a multi-source data fusion monitoring layer, the probability of occurrence of each power limit type is analyzed; The various power limitation types include physical limitation type caused by input overload, indirect limitation type due to alternating conversion loss, capacity attenuation limitation type due to battery aging, and coordination limitation type under dynamic working conditions; The safety decision module is used to establish a generator safety protection mechanism based on the transmission speed adjustment error parameter, the energy storage battery overflow ratio and the probability of occurrence of each power limit type. The generator safety protection mechanism includes a transmission ratio adjustment mechanism and an abnormality feedback mechanism.

2. The power generation system based on an automobile power source according to claim 1, characterized in that: The power speed monitoring module includes: The speed sensor is used to extract the driving speed of the vehicle power source in real time; Obtaining a cruise control speed setting for the vehicle, and determining a theoretical operating transmission ratio of the gearbox according to the driving speed of the vehicle power source and the cruise control speed setting for the vehicle; The driving speed of the vehicle's power source is converted and regulated through the theoretical operating transmission ratio of the gearbox to generate the generator output speed.

3. The power generation system based on an automobile power source according to claim 1, characterized in that: The detection of the continuous operation state of the generator output speed includes: The actual output speed of the generator is located in real time through the speed sensor, and the actual output speed curve of the generator during the continuous operation of the vehicle is established; A reference line is constructed using the generator output speed as a reference value; By comparing the actual output speed curve with the reference line, the continuous operation state of the generator output speed is mapped out, and the continuous operation state includes a stable state and a rough state; The smooth state indicates that the speed regulation operation of the transmission meets the expectation of the cruise control operation of the vehicle power source, and the rough state indicates that the speed regulation operation of the transmission does not meet the expectation of the cruise control operation of the vehicle power source.

4. The power generation system based on an automobile power source according to claim 1, characterized in that: The monitoring of the power status of the energy storage battery to determine the overflow power ratio of the energy storage battery includes the following steps: real-time collection of the storage power ratio of the energy storage battery to perform power judgment; when the storage power ratio exceeds a preset storage power ratio threshold, the battery overflow power ratio of the energy storage power ratio relative to the preset storage power ratio threshold is extracted, which is the energy storage battery overflow power ratio, and the battery storage power limit is triggered.

5. The power generation system based on an automobile power source according to claim 1, characterized in that: The multi-source data fusion monitoring layer includes: By integrating sensor networks and algorithm models to build a multi-source data fusion monitoring layer, real-time monitoring and feature extraction of various power limit types are achieved; The multi-source data fusion monitoring layer includes sublayers consisting of a physical limitation layer corresponding to input overload, an indirect limitation layer corresponding to alternating conversion loss, a capacity attenuation limitation layer corresponding to battery aging, and a coordination limitation layer corresponding to dynamic working conditions; Each of the sub-layers includes extracted features mapped to the power limitation type of the corresponding sub-layer.

6. The power generation system based on an automobile power source according to claim 5, characterized in that: The above mentioned analysis of the probability of occurrence of each type of power restriction by building a multi-source data fusion monitoring layer includes: Obtain the corresponding extracted features for each power limit type; Set the feature threshold of each extracted feature in each sub-layer of the multi-source data fusion monitoring layer, identify the difference between the feature threshold of each extracted feature in each sub-layer and the corresponding extracted feature of the corresponding monitoring layer, and generate the mapping parameters of the multiple extracted features in each sub-layer through the Sigmoid function; According to the one-to-one correspondence between each sub-layer and each power limitation type, the mapping parameters of the multiple extracted features in each sub-layer are mapped to the occurrence probability of each power limitation type.

7. The power generation system based on an automobile power source according to claim 1, characterized in that: The generator safety protection mechanism is established based on the transmission speed adjustment error parameter, the energy storage battery overflow ratio, and the probability of occurrence of each power limit type, including: calculating the energy storage battery overflow ratio corresponding speed deviation relationship parameter based on the energy storage battery overflow ratio and the probability of occurrence of each power limit type; Determine the safety of energy storage batteries, which includes safe conditions and unsafe conditions; Under unsafe conditions of the energy storage battery, the power limit type is used as the battery abnormality type, and an abnormal feedback mechanism is generated, that is, the battery abnormality type is fed back; Under the safety conditions of the energy storage battery, the speed deviation relationship parameters corresponding to the energy storage battery overflow ratio are obtained, and the transmission speed adjustment error parameters are simultaneously obtained to determine the transmission adjustment ratio of the transmission and generate a transmission ratio adjustment mechanism, that is, to optimize the transmission ratio of the transmission.

8. A method for generating electricity based on an automobile power source, comprising: performing the following steps by using the power generation system based on an automobile power source according to any one of claims 1 to 7, characterized in that: include: (1) Obtaining the driving speed of the vehicle power source, converting the driving speed through the gearbox to generate the generator output speed; (2) Detect the continuous operation state of the generator output speed to determine the gearbox speed adjustment error parameter; (3) Monitor the power status of the energy storage battery to determine the overflow rate of the energy storage battery and obtain the types of power limits. Analyze the probability of occurrence of each power limit type by building a multi-source data fusion monitoring layer. (4) A generator safety protection mechanism is established based on the transmission speed adjustment error parameter, the energy storage battery overflow ratio and the occurrence probability of each power limit type. The generator safety protection mechanism includes a transmission ratio adjustment mechanism and an abnormal feedback mechanism.

Images