Power generation system and method based on automobile power source

Abstract

The invention belongs to the technical field of power generation monitoring and adjusting of automobile power sources, and particularly discloses a power generation system and method based on an automobile power source. The rotating speed regulation error parameter of the rotating speed box is verified by detecting the rotating speed regulation sensitivity parameter and the accuracy parameter of the gearbox; generating a rotating speed deviation relation parameter corresponding to the overflowing electric quantity of the energy storage battery by verifying the battery overflowing electric quantity of the energy storage battery in the gearbox conversion process and the occurrence probability of each electric quantity limiting type; and finally, generating a generator safety protection mechanism based on the rotating speed adjustment error parameter of the rotating speed box and the rotating speed deviation relation parameter corresponding to the overflowing electric quantity of the energy storage battery. According to the method, the transmission ratio of the generator is regulated, controlled and corrected by fusing multiple battery limitation types, the regulation and control precision is improved, and the overall efficiency is improved by performing collaborative analysis on multiple modules.

Description

Technical Field

[0001] The invention 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 Art

[0002] With the rapid development of the automobile industry, hybrid vehicles and electric vehicles have gradually become important directions for future transportation. In these vehicles, the efficiency and safety of the energy management system directly determine the performance of the vehicle and the user experience. Traditional automotive power source systems usually rely on internal combustion engines or electric motors to work alone, with low energy conversion efficiency and prone to energy waste or safety hazards under dynamic 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 status in real time.

[0003] In the prior art, there are also some solutions related to the monitoring and regulation of power generation of automobile power sources. For example, the Chinese patent publication number CN105691382A discloses a control method, device and system for automobile energy recovery, and the method flow includes: judging whether the gearbox has completed the upshift and downshift operation; if so, 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 so, stopping power generation and controlling the gearbox to perform the gear shift operation; otherwise, synchronously regulating the speed of the main power source so that the synchronous speed difference reaches the preset range, so that the battery can recover the electrical energy generated by the motor, wherein the main power source is the motor. The energy generated by the gearbox during the upshift process can be stored for the electrical energy required for torque increase after the gear shift is completed, which can increase efficiency and save energy consumption.

[0004] The existing power generation monitoring and regulation schemes for automotive power sources have the following limitations: 1. When regulating the generator transmission ratio, multiple restriction types of battery power are not combined for integrated analysis, such as focusing only on battery overcharge restrictions. Different battery restriction types may affect each other, and this single-dimensional regulation method cannot fully reflect the complex situation of the battery in actual operation, making the regulation results lack accuracy.

[0005] 2. The monitoring methods for multiple modules are relatively scattered, and there is a lack of collaborative working mechanism between 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 adjustment module and the power generation module. Due to the lack of closed-loop control, the system cannot be dynamically optimized according to the actual operating conditions. Summary of the invention

[0006] In view of this, in order to solve the problems raised in the above background technology, a power generation system and method based on an automobile power source is now proposed.

[0007] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a power generation system based on an automobile power source, including: obtaining the driving speed of the automobile power source through a power speed monitoring module, converting the driving speed through a gearbox, and generating a generator output speed.

[0008] 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:

[0009] 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.

[0010] 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 various power limit types, 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 based on the gearbox speed adjustment error parameter, the energy storage battery overflow power ratio 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.

[0012] A second aspect of the present invention provides a method for generating electricity based on an automobile power source, comprising: (1) obtaining a driving speed of the automobile power source, converting the driving speed through a gearbox, and generating an output speed of a generator.

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

[0014] (3) Monitor the power status of the energy storage battery to determine the overflow ratio of the energy storage battery and obtain the types of power restrictions. Analyze the probability of occurrence of each type of power restriction by building a multi-source data fusion monitoring layer.

[0015] (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.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention adjusts and corrects the generator transmission ratio by integrating multiple battery limitation types, thereby increasing the control accuracy and enriching the types of battery power abnormalities, avoiding the phenomenon of insensitive feedback due to abnormal battery power, and reducing the vehicle failure rate caused by abnormal battery power.

[0017] 2. The present invention integrates driving speed monitoring, gearbox adjustment, power generation and safety analysis through closed-loop control, and multiple modules work together to improve overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

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

[0020] Figure 2 The present invention is a schematic flow chart of the steps for implementing the method.

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

[0022] Figure 4 It is a schematic diagram of the process of establishing the generator safety protection mechanism of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 As shown, the present invention provides a power generation system based on an automobile power source, the system comprising: 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 respectively connected to the gearbox operation monitoring module, the energy storage battery status monitoring module, and the safety decision module; the gearbox operation monitoring module is connected to the energy storage battery status monitoring module; and the energy storage battery status monitoring module is connected to the safety decision module.

[0026] The driving speed of the vehicle power source is acquired through the power speed monitoring module, and the driving speed is converted through the gearbox to generate the generator output speed.

[0027] In an implementation manner, the power speed monitoring module includes: extracting the driving speed of the vehicle power source in real time through a speed sensor.

[0028] The cruise control setting speed of the vehicle is obtained, and the theoretical operating transmission ratio of the gearbox is determined according to the driving speed of the vehicle power source and the cruise control setting speed of the vehicle.

[0029] The driving speed of the vehicle power source is converted and regulated through the theoretical operating transmission ratio of the gearbox to generate the output speed of the generator.

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

[0031] It should be noted that the cruise control setting speed determines the expected driving speed of the car. The gearbox shifts gears and changes the transmission ratio according to the cruise control setting and the actual driving conditions. For example, when cruising on a flat road, if the set speed is low, the gearbox will be in a lower gear, 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 shift to a higher gear to make the ratio of engine speed to wheel speed more suitable.

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

[0033] The driving speed energy conversion unit includes: during the driving process of the vehicle, the rotation of the wheels is used to drive the transmission device connected to the wheels to rotate, so that the rotor of the generator rotates; according to the principle of electromagnetic induction, the coil inside the generator cuts the magnetic flux lines in the magnetic field, thereby generating an induced electromotive force, and then generating electrical energy, thereby realizing the conversion from the mechanical energy of the driving speed to electrical energy; 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 cruise control set speed of the vehicle, thereby efficiently converting mechanical energy into electrical energy.

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

[0035] The power electronic controller plays a role in regulating and controlling the transmission of electric energy. It can accurately control the charging process according to the state of charge, voltage, current and other parameters of the energy storage battery to ensure that the energy storage battery can be charged safely and efficiently. For example, when the energy storage battery is low in power, the power electronic controller will allow a larger charging current to speed up the charging speed; when the energy storage battery is close to full charge, the power electronic controller will reduce the charging current to prevent the battery from overcharging.

[0036] The present invention uses a gearbox to dynamically adjust the driving speed and convert it into a generator speed to generate electricity, which can fully recover the kinetic energy of the car during driving, convert energy that might otherwise be wasted into electrical energy for storage, thereby improving the overall energy utilization rate of the car, and by detecting the battery power status, ensure the safety of the energy storage battery.

[0037] During the driving process of the car, the driving speed is converted into the generator speed through the gearbox, thereby generating electricity, and the excess electricity is stored in the battery. In order to achieve energy storage limit and conversion safety monitoring, the following can be adopted: In the process of generating the generator output speed, a gearbox operation monitoring module, a storage battery status monitoring module and a safety decision module are included: 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.

[0038] In an implementation manner, the detection of the continuous operation state of the generator output speed includes: real-time positioning of the actual output speed of the generator through a speed sensor, and establishing an actual output speed curve of the generator during continuous operation of the vehicle, specifically with 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, specifically 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 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.

[0041] The stable state indicates that the speed regulation operation of the transmission meets the cruise control operation expectation of the vehicle power source, and the rough state indicates that the speed regulation operation of the transmission does not meet the cruise control operation expectation of the vehicle power source.

[0042] In the above-mentioned embodiment, the variation trend of the actual output speed curve is determined by comparing the corresponding changes in the output speed at different time points in the reference line with the actual output speed curve, and then the continuous operation state of the generator output speed is mapped. Specifically, if the actual output speed curve always coincides with the reference line, it means that the continuous operation state of the generator output speed is a stable state, otherwise it is a rugged state. For example, if the actual output speed curve of the generator in the time interval belonging to two certain time points does not coincide with the reference line, then the generator has power operation fluctuations in the time interval, and then the continuous operation state of the generator output speed is marked as a rugged state.

[0043] In a further embodiment, the determining of the transmission speed regulation error parameter includes: determining the transmission speed regulation sensitivity parameter by comparing the change in the vehicle cruise control set speed and the actual output speed of the generator at all the same times.

[0044] The implementation method for determining the speed regulation sensitivity parameter of the gearbox is: setting a suitable time period, for example 100ms, obtaining the input shaft speed generated by the driving speed through the torque monitoring device within the time period, calculating the change of the input shaft speed in each time interval and the change of the actual output speed of the generator in each time interval, and the sensitivity parameter is defined as the average of the corresponding ratios of the change of the input shaft speed in each time interval and the change of the actual output speed of the generator in the corresponding time interval.

[0045] The variation within the time interval is obtained by subtracting data from adjacent time points within the time period.

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

[0047] By comparing the driving speed of the vehicle power source and the changes in the actual output speed of the generator at all the same times, the speed regulation accuracy parameters of the gearbox are determined.

[0048] The implementation method for determining the speed regulation accuracy parameter of the gearbox is as follows: based on the principles of vehicle dynamics 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 a given gearbox output speed and other conditions (such as considering factors such as transmission ratio and mechanical efficiency). .

[0049] During the time period, the actual output speed of the generator With 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 corresponding to the standard parameters, compare the speed regulation sensitivity parameters and speed regulation accuracy parameters of the gearbox with the corresponding standard parameters, determine the absolute differences between the sensitivity parameters and accuracy parameters and the corresponding standard parameters, and integrate them into the gearbox speed regulation 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 the absolute difference between the sensitivity parameter and the accuracy parameter and the corresponding standard parameter, such as the average value, the maximum value and other descriptive statistical values, which are 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 parameter are 0.2 and 0.15 respectively. At this time, the gearbox speed regulation error parameter is integrated and processed by taking the maximum value, which is 0.2. If it exceeds the preset error threshold of 0.15, abnormal feedback will be given to the gearbox speed regulation state.

[0054] In some industrial equipment or construction machinery, abnormal gearbox speed regulation may cause equipment out of control, component damage and other problems, posing a threat to the safety of operators and surrounding personnel. Therefore, it is necessary to use abnormal feedback to enable operators to stop equipment operation in time 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 power ratio of the energy storage battery and obtain various power limit types, and analyze the occurrence probability of each power limit type by constructing a multi-source data fusion monitoring layer.

[0056] In an implementation manner, the power status of the energy storage battery is monitored to determine the overflow power ratio of the energy storage battery, and the content is: real-time collection of the storage power ratio of the energy storage battery is performed to determine the power; 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, that is, the energy storage battery overflow power ratio, and the battery storage energy limit is triggered.

[0057] The storage capacity ratio refers to the ratio of the battery's charged capacity to the battery's full capacity.

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

[0059] Specifically, by monitoring the overflow rate of the energy storage battery, the generator output power is limited to achieve the purpose of limiting the battery storage capacity. For example, when the overflow rate of the energy storage battery is close to the upper limit, the generator output power is gradually reduced, and the excess power is used to drive the car first; when the overflow rate of the energy storage battery reaches the upper limit, charging is completely stopped. By monitoring the power status of the energy storage battery, it helps to prevent battery overcharging and extend battery life.

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

[0061] In a further implementation manner, 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 achieve real-time monitoring and feature extraction of each type of power limitation.

[0062] See also Figure 3 As shown, the multi-source data fusion monitoring layer includes sub-layers 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.

[0063] Each of the sub-layers includes each extracted feature mapped to the power limitation type of the corresponding sub-layer.

[0064] Specifically, the integrated sensor network and algorithm model is: by deploying a variety of sensors to collect real-time relevant data of each sublayer belonging to the multi-source data fusion monitoring layer, such as by deploying temperature sensors to collect input current in the physical restriction layer or the indirect restriction layer, and by deploying SOC sensors to collect the battery power status in the capacity attenuation restriction layer, and at the same time establishing a relevant data algorithm system for each sublayer to calculate the monitoring results, such as establishing a difference algorithm system between extracted features and set threshold features.

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

[0066] The indirect restriction layer includes characteristics such as harmonic distortion rate of the rectifier input / output end and AC / DC conversion efficiency mapped to the indirect restriction type. In the process of converting current from AC to DC, energy loss will occur due to insufficient rectifier efficiency, which is a factor affecting the battery energy storage capacity.

[0067] The capacity decay limiting layer includes characteristics such as the number of battery cycles and the internal resistance growth rate mapped to the capacity decay limiting type. As the battery is used for a longer time, its capacity gradually decays, causing the battery to be unable to store the rated amount of electricity, thus limiting the battery's energy storage capacity.

[0068] The coordination restriction layer includes features such as the transmission ratio adjustment frequency, the matching deviation rate of the battery SOC and the driving torque, etc., which are mapped to the coordination restriction type. Under dynamic conditions such as vehicle acceleration, deceleration, and climbing, the lack of coordination between the various components of the system leads to uneven energy distribution, which in turn leads to power overflow and limits the battery energy storage capacity.

[0069] The real-time feature extraction of each power limit type is common knowledge parameters.

[0070] In a further implementation manner, the analysis of the occurrence probability of each type of power limitation by constructing a multi-source data fusion monitoring layer includes: obtaining corresponding extraction features of each type of power limitation.

[0071] Set the feature threshold of each extracted feature in each sub-layer of the multi-source data fusion monitoring layer, and 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 , the mapping parameters of multiple extracted features in each sub-layer are generated by Sigmoid function, which is ,in Indicates the preset reference difference. It reflects the difference deviation degree of the extracted features belonging to the monitoring layer. Indicates the number of each sublayer, , , Indicates the number of each extracted feature, , e represents a natural constant, and the Sigmoid function is used to limit the mapping parameters within the range of 0-1 to satisfy the probability of occurrence after the mapping relationship is within the range of 0-1. The greater the difference deviation, the greater the impact of the extracted features in the sub-layer on the mapping parameters, which leads to a greater probability of the occurrence of the power limitation type.

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

[0073] Table 1 Sigmoid function calculation data example

[0074]

[0075] The feature threshold of each extracted 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 based on a large amount of past practical experience, historical data and the judgment of professionals to determine a reasonable feature threshold.

[0076] Specifically, the mapping relationship between the feature threshold of each extracted feature in each sublayer and the extracted feature of the corresponding monitoring layer refers to the difference between the feature threshold of each extracted feature in each sublayer and the corresponding extracted feature of the corresponding monitoring layer, including current difference, AC / DC conversion efficiency difference, internal resistance growth rate, battery SOC and driving torque matching deviation rate, etc. For example, for the instantaneous peak value of current in the physical restriction layer, the difference between the instantaneous peak value excess value of current and the value exceeding the maximum allowable current threshold is detected; for the AC / DC conversion efficiency in the indirect restriction layer, the difference between the AC / DC conversion efficiency and the value below the threshold of 80% is detected; for the internal resistance growth rate in the capacity attenuation restriction layer, the difference between the internal resistance growth rate and the value above the threshold of 10% is detected; for the matching deviation rate of the battery SOC and the driving torque in the coordination restriction layer, the difference between the value exceeding the matching deviation rate 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 the multiple extracted features in each sub-layer are mapped to the occurrence probability of each power limit type.

[0078] The one-to-one correspondence between each sublayer and each power limitation type is as follows: the physical limitation layer corresponds to the physical limitation type, the indirect limitation layer corresponds to the indirect limitation type, the capacity attenuation limitation layer corresponds to the capacity attenuation limitation type, and the coordination limitation layer corresponds to the coordination limitation layer type. Exemplarily, the mapping parameters of multiple extracted features in the physical limitation layer are equivalent to the occurrence probability of the physical limitation type.

[0079] The safety decision module is used to establish a generator safety protection mechanism based on the gearbox speed adjustment error parameter, the energy storage battery overflow power ratio 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] See also Figure 4 As shown, in the implementation mode, according to the gearbox speed adjustment error parameter, the energy storage battery overflow power ratio and the occurrence probability of each power limit type, a generator safety protection mechanism is established, including: according to the energy storage battery overflow power ratio and the probability of occurrence of each power limit type , calculate the energy storage battery overflow ratio corresponding speed deviation relationship parameters ,in Indicates the number of each power limit type, , It reflects the impact of the overflow degree of the energy storage battery when the gearbox speed regulation is deflected. Reflects the impact of mechanical errors of various power limitation types on the gearbox speed regulation deflection.

[0081] Specifically, overcharging, high temperature, overcurrent and battery aging have different probabilities for power limitation. The overflow power ratio data of energy storage batteries show different performances in size, fluctuation and change trend from aspects such as overcharging, temperature influence, current conditions and battery performance degradation.

[0082] Determine the safety of the energy storage battery. The safety of the energy storage battery includes safe conditions and unsafe conditions. Compare the speed deviation relationship parameter corresponding to the energy storage battery overflow power ratio with the preset deviation relationship threshold. If the speed deviation relationship parameter corresponding to the energy storage battery overflow power ratio exceeds the preset deviation relationship threshold, the energy storage battery safety is determined to be an unsafe condition.

[0083] 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.

[0084] Under the safety condition of the energy storage battery, obtain the speed deviation relationship parameters of the energy storage battery overflow ratio and the gearbox speed adjustment error parameters simultaneously. , determine the gearbox adjustment ratio , which is used to measure the gearbox's gear ratio adjustment requirements under the conditions of energy storage battery overflow ratio and speed adjustment error, where Indicates that the preset unit error parameter corresponds to the transmission ratio adjustment requirement, which is set through empirical fitting. The speed deviation relationship parameter and the gearbox speed adjustment error parameter are preset with corresponding influence weights, reflecting the different influences of these two parameters in the transmission ratio adjustment, such as , generate the gearbox ratio adjustment mechanism, that is, optimize the gearbox ratio.

[0085] The gearbox speed adjustment error parameter directly reflects the degree of deviation between the actual gearbox speed and the expected speed. By analyzing this parameter, the effect of the gearbox transmission adjustment can be understood in real time, and the transmission ratio can be accurately adjusted according to actual needs, so that the output speed of the gearbox is more in line with the requirements of the vehicle driving conditions, and the accuracy and stability of the transmission adjustment can be improved.

[0086] The transmission speed adjustment error parameter accurately measures the actual needs of the transmission and allows the system to maintain stable operation under different working conditions. For example, during vehicle acceleration, deceleration or climbing, it can effectively avoid system jitter, impact and other problems caused by transmission mismatch, extend the service life of the transmission and related components, and enhance the reliability of the entire power system. And these parameters provide a key basis for transmission fault diagnosis. When the energy storage battery overflows abnormally, and the speed deviation and adjustment error exceed the normal range, it is likely to indicate that the transmission or related systems have hidden faults. Through continuous monitoring and analysis of these parameters, potential problems can be discovered in advance, predictive maintenance can be performed, and the probability of sudden 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; the abnormal feedback mechanism gearbox is used to prevent excessive energy storage power input from causing damage to the battery.

[0088] On the one hand, the present invention adjusts and corrects the generator transmission ratio by integrating multiple battery limitation types, thereby increasing the control accuracy and enriching the types of battery power abnormalities, avoiding the phenomenon of insensitive feedback due to battery power abnormalities, and reducing the vehicle failure rate caused by battery power abnormalities.

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

[0090] See also Figure 2As shown, the second aspect of the present invention provides a method for generating electricity based on an automobile power source, comprising: (1) obtaining a driving speed of the automobile power source, converting the driving speed through a gearbox, and generating a generator output speed.

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

[0092] (3) Monitor the power status of the energy storage battery to determine the overflow ratio of the energy storage battery and obtain the types of power restrictions. Analyze the probability of occurrence of each type of power restriction by building a multi-source data fusion monitoring layer.

[0093] (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.

[0094] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

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 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 each power limit type, and analyze the occurrence probability of each power limit type by building a multi-source data fusion monitoring layer; 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. The generator safety protection mechanism includes a gearbox transmission ratio adjustment mechanism and an abnormal feedback mechanism.

2. A 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 setting speed of 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 setting speed of the vehicle; The driving speed of the vehicle power source is converted and regulated through the theoretical operating transmission ratio of the gearbox to generate the output speed of the generator.

3. The power generation system based on an automobile power source according to claim 1, characterized in that: The continuous operation state of detecting the output speed of the generator 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 stable state indicates that the speed regulation operation of the transmission meets the cruise control operation expectation of the vehicle power source, and the rough state indicates that the speed regulation operation of the transmission does not meet the cruise control operation expectation of the vehicle power source.

4. A power generation system based on an automobile power source according to claim 3, characterized in that: The determination of the transmission speed adjustment error parameter includes: By comparing the changes in the vehicle cruise control set speed and the actual output speed of the generator at all the same times, the speed regulation sensitivity parameter of the gearbox is determined; By comparing the driving speed of the vehicle power source and the change in the actual output speed of the generator at all the same times, the speed regulation accuracy parameter of the gearbox is determined; Set the sensitivity parameter and the accuracy parameter to correspond to the standard parameter, compare the speed regulation sensitivity parameter and the speed regulation accuracy parameter of the gearbox with the corresponding standard parameter, determine the absolute difference between the sensitivity parameter and the accuracy parameter and the corresponding standard parameter, and integrate them into the gearbox speed regulation error parameter; 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.

5. 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: 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.

6. The power generation system based on an automobile power source according to claim 1, characterized in that: The various power limitation types include a physical limitation type caused by input overload, an indirect limitation type due to alternating conversion loss, a capacity attenuation limitation type due to battery aging, and a coordination limitation type under dynamic conditions.

7. 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 can be achieved; The multi-source data fusion monitoring layer includes sub-layers consisting of a physical restriction layer corresponding to input overload, an indirect restriction layer corresponding to alternating conversion loss, a capacity attenuation restriction layer corresponding to battery aging, and a coordination restriction layer corresponding to dynamic working conditions; Each of the sub-layers includes each extracted feature mapped to the power limitation type of the corresponding sub-layer.

8. The power generation system based on the automobile power source according to claim 7, characterized in that: The above mentioned analysis of the occurrence probability of each type of power restriction by constructing a multi-source data fusion monitoring layer includes: Obtain the corresponding extraction features of 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 limit type, the mapping parameters of the multiple extracted features in each sub-layer are mapped to the occurrence probability of each power limit type.

9. The power generation system based on an automobile power source according to claim 1, characterized in that: The generator safety protection mechanism is established according to the gearbox speed adjustment error parameter, the energy storage battery overflow power ratio and the occurrence probability of each power limit type, including: calculating the speed deviation relationship parameter corresponding to the energy storage battery overflow power ratio according to the energy storage battery overflow power ratio and the occurrence probability of each power limit type; Determine the safety of energy storage batteries, which include 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 condition of the energy storage battery, the speed deviation relationship parameters of the energy storage battery overflow ratio are obtained, and the gearbox speed adjustment error parameters are obtained simultaneously to determine the gearbox adjustment ratio and generate the gearbox ratio adjustment mechanism, that is, to optimize the gearbox ratio.

10. A method for generating electricity based on an automobile power source, characterized in that: include: (1) Obtaining the driving speed of the vehicle power source, converting the driving speed through a gearbox to generate a 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 ratio of the energy storage battery and obtain the types of power restrictions. Analyze the occurrence probability of each type of power restriction 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.

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