A battery method and system for extending the range of an electric skateboard

Abstract

The present invention relates to the technical field of electric skateboard batteries, and discloses an electric skateboard range-extending battery method and system, the system comprising: a battery module, including a main battery and a range-extending battery, for powering the electric skateboard; a data monitoring module, for collecting travel information, and state parameters of the main battery and the range-extending battery; a data storage module, for storing the travel information and constructing a travel data set; a strategy module, for formulating a power supply strategy based on the travel data set, and adjusting the power supply strategy based on the real-time state parameters of the main battery; a power supply control module, for executing the power supply strategy and controlling the working states of the main battery and the range-extending battery. The present invention effectively improves the endurance, driving experience and battery life of the electric skateboard through intelligent battery management and flexible power supply strategies, bringing high-quality and reliable travel experience to users of electric skateboards.

Description

Technical Field

[0001] The present invention relates to the technical field of electric skateboard batteries, and in particular to a range-extending battery method and system for an electric skateboard. Background Art

[0002] As an emerging means of transportation for short-distance travel, electric skateboards have gained wide attention and application due to their convenience, economy and environmental protection. The limitation of driving range has always been a bottleneck restricting the development of the electric skateboard market. In recent years, the electric skateboard industry has undergone rapid technological innovation, especially in battery technology. Lithium batteries have become the mainstream choice of electric skateboard batteries due to their high energy density, long cycle life and low maintenance cost. At the same time, the development of intelligent battery management systems has also significantly improved the safety performance and efficiency of batteries. These technological advances have significantly improved the driving range of electric skateboards, but there are still some unresolved issues.

[0003] Traditional electric skateboards are usually equipped with only one main battery. When the battery is exhausted, it needs to be charged externally before it can continue to be used, which limits the practicality of the electric skateboard. In addition, the health status of the battery and environmental factors such as temperature and humidity will affect the battery performance and the overall performance of the electric skateboard. In terms of battery power supply strategy, existing electric skateboards lack intelligent management methods and cannot dynamically adjust the battery usage mode according to actual road conditions and driving habits. At the same time, the battery will age after long-term use, resulting in problems such as decreased capacity and increased internal resistance. If it is not effectively monitored and managed, it will affect the performance of the electric skateboard and bring safety hazards. Therefore, developing a solution that can optimize battery configuration and management strategies and enhance the endurance performance of electric skateboards is not only a market demand, but also a trend of technological development.

[0004] For example, a Chinese patent application with publication number CN109244304A discloses an electric vehicle battery pack, including an upper shell, a lower shell, a charging and discharging port, an insulating plate, a fixing plate, a battery module, a bracket, a total positive electrode of the battery, a total negative electrode of the battery and a handle, wherein the upper shell is connected to the lower shell. The fixing plate is connected to the corresponding surface of the connecting surface of the insulating plate and the upper shell, the battery module is connected between the two sets of fixing plates, the total positive electrode of the battery is connected to one side of the fixing plate, and the total negative electrode of the battery is connected to the other side of the fixing plate. A battery management system BMS is arranged on the insulating plate, a buffer pad is arranged under the fixing plate located under the battery pack, and a waterproof sealing ring is arranged at the connection between the lower shell and the upper shell. Adding a battery management system BMS improves the safety of the battery pack. The battery pack is separated by a fixing plate to facilitate heat dissipation and avoid accidents caused by overheating of the battery pack during driving or charging. The battery modules are all in a unified form, which is convenient for assembly and on-site construction.

[0005] For example, a Chinese patent with the authorization announcement number CN204375806U discloses a battery pack that can increase the driving range of an electric vehicle, including a battery fixing box, the battery fixing box has an upward opening, the space in the battery fixing box is divided into multiple battery placement cavities by a partition, each battery placement cavity is fixedly connected to a battery module monomer, the front side of each battery module monomer has a discharge port, a charging port and a discharge switch, an electric vehicle controller is fixedly installed on the front side of the battery fixing box, and the discharge port of each battery module monomer is connected to the electric vehicle controller through a discharge line. The front and rear sides of the battery module monomer are fixedly connected to a battery fixing bar, the battery fixing bar is horizontally arranged, and a battery fixing hole is opened on the battery fixing bar. The bottom wall of the battery fixing box where each battery placement cavity is located has a fixing box fixing hole, and the fixing box fixing hole corresponds to the battery fixing hole. The battery module monomer is connected to the battery fixing box through the fixing box fixing hole and the battery fixing hole.

[0006] The above patents all have the problem raised by this background technology: there is a lack of intelligent management means in the battery power supply strategy.

[0007] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an electric skateboard range-extending battery method and system to improve the endurance, driving experience and battery life of the electric skateboard.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] In one aspect, the present invention provides an electric skateboard range-extending battery system, including a battery module, a data monitoring module, a data storage module, a strategy module, and a power supply control module;

[0011] Wherein, the battery module includes a main battery and a range-extending battery, which are used to power the electric skateboard;

[0012] The data monitoring module is used to collect travel information and status parameters of the main battery and the range-extending battery;

[0013] The data storage module is used to store the travel information and construct a travel data set;

[0014] The strategy module is used to formulate a power supply strategy based on the travel data set and adjust the power supply strategy based on the real-time status parameters of the main battery;

[0015] The power supply control module is used to execute the power supply strategy and control the working status of the main battery and the range-extending battery.

[0016] As a preferred solution of the electric skateboard range-extending battery system of the present invention, the travel information includes road information and skateboard working information; the data monitoring module includes a road information unit, a skateboard information unit, and a battery status unit; wherein:

[0017] The road information unit is used to collect road information in real time, including the coordinates and slope information of each waypoint during the journey;

[0018] The skateboard information unit is used to collect the skateboard working information in real time, including the braking record during the trip and the skateboard speed at each passing point;

[0019] The battery status unit is used to collect status parameters of the main battery and the range-extending battery, and the status parameters include operating temperature, open-circuit voltage, internal resistance, and capacity index.

[0020] As a preferred solution of the electric skateboard range-extending battery system of the present invention, the data storage module includes a data cleaning unit, a travel parameter unit, and a data set unit; wherein:

[0021] The data cleaning unit is used to clean the travel information;

[0022] The travel parameter unit calculates travel parameters based on the travel information after data cleaning, including climbing index, braking frequency, and acceleration coefficient;

[0023] The data set unit constructs a travel data set based on the travel parameters; the method is as follows:

[0024] The trip information, trip parameters, trip date, and trip start time of a trip are combined into one trip data; the trip data of each trip together constitute the trip data set.

[0025] As a preferred solution of the electric skateboard range-extending battery system of the present invention, the method for the travel parameter unit to calculate the climbing index is as follows: reading the road information of any section of the journey, counting the uphill path length and the total path length of the journey and calculating the climbing index; the climbing index is the ratio of the uphill path length to the total path length;

[0026] The method for calculating the braking frequency by the stroke parameter unit is as follows: reading the working information of the slide plate in any stroke, counting the number of braking times based on the braking records and calculating the braking frequency; the braking frequency is the ratio of the number of braking times to the total length of the stroke path;

[0027] The method for the travel parameter unit to calculate the acceleration coefficient is as follows: read the skateboard working information of any section of the journey, identify the acceleration section based on the skateboard speed of each waypoint and calculate the acceleration coefficient; the acceleration coefficient is the ratio of the sum of the path lengths of all acceleration sections to the total path length of the journey.

[0028] As a preferred solution of the electric skateboard range-extending battery system of the present invention, the strategy module includes a strategy generation unit for formulating a power supply strategy, and the method is as follows:

[0029] The strategy generation unit calculates the discharge threshold of the main battery based on the travel data set, and formulates a power supply strategy based on the discharge threshold of the main battery; the method is as follows:

[0030] S100: Calculating predicted values ​​of the trip parameters of this trip based on the neural network model;

[0031] The input of the neural network model is the date and start time of any trip; the output is the predicted value of each trip parameter of the trip;

[0032] S200: Calculate the discharge threshold of the main battery of this trip based on the predicted value of the trip parameter of this trip; the formula is as follows:

[0033] ;

[0034] Where S represents the discharge threshold of the main battery in this trip; A reference value for the discharge threshold of the main battery; Indicates the predicted value of braking frequency; represents the predicted value of the climbing index; represents the predicted value of the acceleration factor; represents the weight coefficient;

[0035] S300: formulating a power supply strategy for this trip based on a discharge threshold of the main battery of this trip;

[0036] The power supply strategy is as follows:

[0037] When the remaining capacity of the main battery is greater than the discharge threshold of the main battery, the main battery independently supplies power to the electric skateboard;

[0038] When the remaining capacity of the main battery is not greater than the discharge threshold, and the voltage difference between the main battery and the range-extending battery is not less than the safety threshold, the power supply mode is switched to the range-extending battery independently supplying power to the electric skateboard;

[0039] When the remaining capacity of the main battery is not greater than the discharge threshold, and the voltage difference between the main battery and the range-extending battery is less than the safety threshold, the power supply mode is switched to the main battery and the range-extending battery simultaneously supplying power to the electric skateboard.

[0040] As a preferred solution of the electric skateboard range-extending battery system of the present invention, the strategy module further includes a state parameter unit and a strategy adjustment unit; wherein the state parameter unit is used to calculate the temperature index and health index of the main battery and the range-extending battery; the strategy adjustment unit adjusts the discharge threshold of the main battery based on the temperature index and the health index, and generates a discharge strategy instruction;

[0041] The temperature index is the average value of the working temperature of any battery; the calculation method is as follows: from the beginning of the trip, the working temperature of the battery is continuously collected within a time period of N and the average value is calculated as the temperature index of the battery;

[0042] The calculation formula of the health index is as follows:

[0043] ;

[0044] Where H represents the health index of any battery; represents capacity index; U represents open circuit voltage; R represents internal resistance; Indicates the rated open circuit voltage; Indicates rated internal resistance;

[0045] The formula for adjusting the discharge threshold of the main battery is as follows:

[0046] ;

[0047] in, Indicates the adjusted value of the discharge threshold of the main battery; Indicates the health index of the main battery; Indicates the temperature index of the main battery; Represents the adjustment factor.

[0048] As a preferred solution of the electric skateboard range-extending battery system of the present invention, the power supply control module includes a strategy instruction unit, a battery monitoring unit, and a switch control unit; wherein:

[0049] The strategy instruction unit is used to store discharge strategy instructions;

[0050] The battery monitoring unit is used to monitor the state of charge of the main battery and the voltage difference between the main battery and the range-extending battery in real time;

[0051] The switch control unit controls the connection between the main battery and the range-extending battery and the power supply circuit based on the discharge strategy instruction, specifically as follows: when the main battery independently supplies power to the electric skateboard, the range-extending battery is disconnected from the power supply circuit; when the power supply mode is switched to the range-extending battery independently supplying power to the electric skateboard, the range-extending battery is connected to the power supply circuit and the main battery is disconnected from the power supply circuit; when the power supply mode is switched to the main battery and the range-extending battery simultaneously supplying power to the electric skateboard, the main battery is connected to the power supply circuit.

[0052] As a preferred solution of the range-extending battery system of the electric skateboard of the present invention, the strategy instruction unit is configured with a charging strategy instruction, which is as follows: when charging, when the voltage difference between the main battery and the range-extending battery is greater than a safety threshold, the one with a lower state of charge of the main battery and the range-extending battery is charged alone; when the voltage difference between the main battery and the range-extending battery is not greater than the safety threshold, the charging mode is switched to charging the main battery and the range-extending battery at the same time;

[0053] The switch control unit controls the connection between the main battery and the extended-range battery and the charging circuit based on the charging strategy instruction; when the one with a lower state of charge among the main battery and the extended-range battery is charged alone, the one with a higher state of charge is disconnected from the charging circuit; when the charging mode is switched to charging the main battery and the extended-range battery at the same time, the main battery and the extended-range battery are connected to the charging circuit at the same time.

[0054] In a second aspect, the present invention provides a method for extending the range of an electric skateboard battery, comprising the following steps:

[0055] S1: Collecting trip information and status parameters of the main battery and the extended-range battery;

[0056] S2: performing data cleaning on the trip information, calculating trip parameters and constructing a trip data set;

[0057] S3: training a neural network model for predicting travel parameters based on the travel data set;

[0058] S4: Calculate the predicted value of the trip parameter of the current trip based on the neural network model, and calculate the discharge threshold of the main battery of the current trip;

[0059] S5: formulating a power supply strategy for this trip based on the discharge threshold of the main battery of this trip;

[0060] S6: Calculate the temperature index and health index of the main battery, adjust the discharge threshold of the main battery, and generate a discharge strategy instruction based on the power supply strategy;

[0061] S7: Execute the discharge strategy instruction to supply power to the electric skateboard during this trip.

[0062] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0063] The existence of the extended-range battery provides an additional source of power, and the intelligent switching of power supply modes according to actual needs and battery status increases the flexibility of the system. Through intelligent battery management strategies, the dependence on a single battery is reduced, and the workload of the main battery and the extended-range battery is balanced, thereby protecting the health of the battery. The main battery and the extended-range battery are connected in parallel to provide higher peak power to meet the needs of high-power driving behavior.

[0064] By collecting road information, skateboard working status and battery status parameters in real time, it provides a basis for intelligent decision-making. By monitoring the battery health status to dynamically adjust the discharge threshold, it ensures the reasonable distribution of power output of the main battery and the extended-range battery under different driving conditions, and improves energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0066] Figure 1 A schematic diagram of the structure of the range-extending battery system for an electric skateboard provided by the present invention;

[0067] Figure 2 A functional schematic diagram of the range-extending battery system for an electric skateboard provided by the present invention;

[0068] Figure 3 A flow chart of a method for formulating a power supply strategy based on a discharge threshold of a main battery provided by the present invention;

[0069] Figure 4 This is a flow chart of the battery method for extending the range of an electric skateboard provided by the present invention. DETAILED DESCRIPTION

[0070] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0071] Example 1

[0072] This embodiment introduces an electric skateboard range-extending battery system. Figure 1,The system includes a battery module, a data monitoring module, a data storage module, a strategy module, and a power supply control module;

[0073] Wherein, the battery module includes a main battery and a range-extending battery, which are used to power the electric skateboard;

[0074] The data monitoring module is used to collect travel information and status parameters of the main battery and the extended-range battery; it includes a road information unit, a skateboard information unit, and a battery status unit; the travel information includes road information and skateboard working information;

[0075] The road information unit is used to collect road information in real time, including the coordinates and slope information of each waypoint in the journey; the sampling accuracy of the waypoints in each journey is set by technicians in this field according to actual needs;

[0076] The electric skateboard has built-in sensors that can measure slopes, such as tilt sensors or slope sensors, which are usually accelerometers based on micro-electromechanical systems, and sometimes combined with gyroscopes to provide more accurate tilt angle measurements. At the same time, the electric skateboard can obtain the coordinates of any passing point through GPS, inertial navigation systems, etc.; the road information unit reads road information through communication with the electric skateboard.

[0077] The skateboard information unit is used to collect the skateboard working information in real time, including the braking record during the trip and the skateboard speed at each passing point;

[0078] The electric skateboard calculates the skateboard speed based on built-in speed sensors such as Hall effect sensors, magnetic encoders, accelerometers, etc. At the same time, the built-in data logger of the electric skateboard can mark the skateboard working data corresponding to the braking event. The skateboard information unit reads the skateboard working information through communication with the electric skateboard.

[0079] The battery status unit is used to collect status parameters of the main battery and the range-extending battery, wherein the status parameters include operating temperature, open circuit voltage, internal resistance, and capacity index;

[0080] The operating temperature of the battery is affected by the ambient temperature; in an overly cold ambient temperature, the operating temperature of the battery is too low, the battery performance is affected, and the discharge efficiency is reduced. In order to ensure the stability of the power supply, when the operating temperature of the main battery is too low, it is necessary to appropriately increase the power output ratio of the extended-range battery. The open circuit voltage of the battery can reflect the working status and health level of the battery; a drop in the open circuit voltage may mean that the battery is aging or there is an internal fault. As the battery ages, the internal resistance will gradually increase. Higher internal resistance will cause the load voltage to drop rapidly when the battery is discharged at a larger current, affecting the power supply performance. In this embodiment, the capacity index is expressed in terms of the capacity definition of SOH, that is, the capacity index is equal to the ratio of the maximum available capacity of the battery to the rated capacity.

[0081] The data storage module is used to store the travel information and construct a travel data set; it includes a data cleaning unit, a travel parameter unit, and a data set unit;

[0082] The data cleaning unit is used to perform data cleaning on the trip information, including abnormal value detection and replacement, missing value filling, and duplicate value deletion;

[0083] The travel parameter unit calculates the travel parameters based on the travel information after data cleaning, including the climbing index, the braking frequency, and the acceleration coefficient; wherein the method for calculating the climbing index is as follows: reading the road information of any section of the journey, and counting the uphill path length and the total path length of the journey; the climbing index is the ratio of the uphill path length to the total path length; the path section with a positive slope is an uphill section, and the uphill path length and the total path length of the journey are calculated by the coordinates of each waypoint in the journey.

[0084] The method for calculating the braking frequency is as follows: reading the working information of the skateboard in any section of the journey, and counting the number of braking times based on the braking records; the braking frequency is the ratio of the number of braking times to the total length of the path of the journey, indicating the number of braking times of the electric skateboard per unit distance traveled;

[0085] The method for calculating the acceleration coefficient is as follows: reading the working information of the skateboard of any section of the journey, identifying the acceleration section based on the skateboard speed of each waypoint; the acceleration coefficient is the ratio of the sum of the path lengths of all the acceleration sections to the total path length of the journey;

[0086] The data set unit constructs a travel data set based on the travel parameters; the method is as follows:

[0087] The trip information, trip parameters, trip date, and trip start time of a trip are combined into one trip data; the trip data of each trip together constitute the trip data set.

[0088] The strategy module formulates a power supply strategy based on the travel data set and adjusts the power supply strategy based on the real-time state parameters of the main battery; it includes a strategy generation unit, a state parameter unit, and a strategy adjustment unit;

[0089] The strategy generation unit calculates the discharge threshold of the main battery based on the travel data set, and formulates a power supply strategy based on the discharge threshold of the main battery; the method refers to Figure 3 , the steps are as follows:

[0090] S100: Calculating predicted values ​​of the trip parameters of this trip based on the neural network model;

[0091] The input of the neural network model is the date and start time of any trip; the output is the predicted value of each trip parameter of the trip; the neural network model includes: an input layer, a hidden layer, and an output layer; the input layer is used to receive the date and start time of any trip; the date and start time have been encoded into a feature vector before being input into the neural network model, wherein the feature vector of the date adds the labels of working day / non-working day and the labels of holiday / non-holiday; the hidden layer is used to extract the features of the date and start time; the output layer calculates and outputs the predicted values ​​of the trip parameters including the climbing index, the braking frequency, and the acceleration coefficient through a linear activation function;

[0092] S200: Calculate the discharge threshold of the main battery of this trip based on the predicted value of the trip parameter of this trip; the formula is as follows:

[0093] ;

[0094] Where S represents the discharge threshold of the main battery in this trip; A reference value of the discharge threshold of the main battery, expressed as the state of charge SOC, which is set by those skilled in the art based on experience; Indicates the predicted value of braking frequency; represents the predicted value of the climbing index; represents the predicted value of the acceleration factor; Represents a weight coefficient, which is set by technicians in this field based on actual needs.

[0095] Different road conditions will affect the energy consumption of electric skateboards. In sections with a large climbing index, there are more uphill climbs, and the discharge threshold of the main battery needs to be increased to enable the extended-range battery in advance to provide stable power supply for continuous climbing; the braking frequency and acceleration coefficient reflect the user's driving habits. The larger the braking coefficient and the larger the acceleration coefficient, the more aggressive the user's driving habits, that is, the more frequent the acceleration and braking, and the discharge threshold of the main battery needs to be increased to meet the instantaneous energy consumption requirements of frequent acceleration and braking. If the braking frequency and acceleration coefficient are small, the user is more inclined to drive smoothly, and the discharge threshold of the main battery can be lowered to let the main battery take on more power supply tasks, reduce the use of the extended-range battery, and extend the service life of the battery pack.

[0096] S300: formulating a power supply strategy for this trip based on a discharge threshold of the main battery of this trip;

[0097] The power supply strategy is as follows:

[0098] When the remaining capacity of the main battery is greater than the discharge threshold of the main battery, the main battery independently supplies power to the electric skateboard;

[0099] When the remaining capacity of the main battery is not greater than the discharge threshold, and the voltage difference between the main battery and the range-extending battery is not less than the safety threshold, the power supply mode is switched to the range-extending battery independently supplying power to the electric skateboard; the safety threshold is set by technicians in this field based on actual needs;

[0100] When the remaining capacity of the main battery is not greater than the discharge threshold, and the voltage difference between the main battery and the range-extending battery is less than the safety threshold, the power supply mode is switched to the main battery and the range-extending battery supplying power to the electric skateboard at the same time; when supplying power at the same time, the main battery and the range-extending battery are connected in parallel;

[0101] In the prior art, the main battery or the range-extending battery is mostly used to independently supply power to the electric skateboard. The solution adopted in this embodiment in which the main battery and the range-extending battery are connected in parallel to supply power to the electric skateboard at the same time can provide a more stable power supply and a higher peak power to meet the power supply requirements of driving behaviors with high power consumption such as climbing and accelerating.

[0102] The state parameter unit calculates a temperature index and a health index of the main battery and the range-extending battery based on the state parameter;

[0103] The temperature index is the average value of the working temperature of any battery; from the beginning of the trip, the working temperature of the battery is continuously collected within a time period of N and the average value is calculated as the temperature index of the battery;

[0104] The calculation formula of the health index is as follows:

[0105] ;

[0106] Where H represents the health index of any battery; represents capacity index; U represents open circuit voltage; R represents internal resistance; Indicates the rated open circuit voltage; Indicates rated internal resistance;

[0107] As the battery ages, the open circuit voltage and capacity index will gradually decrease, while the internal resistance will gradually increase. The above health index can reflect the degree of battery aging.

[0108] The strategy adjustment unit adjusts the discharge threshold of the main battery based on the temperature index and the health index, and generates a discharge strategy instruction; the formula is as follows:

[0109] ;

[0110] in, Indicates the adjusted value of the discharge threshold of the main battery; Indicates the health index of the main battery; Indicates the temperature index of the main battery; It represents the adjustment coefficient, which is set by technicians in this field based on actual needs.

[0111] Based on the above formula, when the health index of the main battery is large, that is, the main battery is in good health, a lower discharge threshold is set to allow the main battery to start working with the range extender battery at a lower SOC level. This makes full use of the good condition of the main battery, reduces the use of the range extender battery, and helps to extend the overall service life of the battery pack. On the contrary, if the main battery is in poor health, a larger discharge threshold will be set to allow the main battery to start working with the range extender battery at a higher SOC level to reduce the discharge pressure of the main battery and avoid excessive discharge.

[0112] After adjusting the discharge threshold of the main battery, the discharge threshold of the main battery involved in the power supply strategy is updated to the adjusted discharge threshold of the main battery, the other contents of the power supply strategy remain unchanged, and the power supply strategy is written into an executable program instruction, namely, a discharge strategy instruction.

[0113] The power supply control module is used to execute the power supply strategy and control the working status of the main battery and the range-extending battery.

[0114] The power supply control module includes a strategy instruction unit, a battery monitoring unit, and a switch control unit;

[0115] The strategy instruction unit is used to store discharge strategy instructions;

[0116] The battery monitoring unit is used to monitor the state of charge of the main battery and the voltage difference between the main battery and the range-extending battery in real time;

[0117] The switch control unit controls the connection between the main battery and the range-extending battery and the power supply circuit based on the discharge strategy instruction. When the main battery independently supplies power to the electric skateboard, the range-extending battery is disconnected from the power supply circuit; when the power supply mode is switched to the range-extending battery independently supplying power to the electric skateboard, the range-extending battery is connected to the power supply circuit and the main battery is disconnected from the power supply circuit; when the power supply mode is switched to the main battery and the range-extending battery simultaneously supplying power to the electric skateboard, the main battery is connected to the power supply circuit.

[0118] The strategy instruction unit is also configured with a charging strategy instruction, which is as follows: when charging, when the voltage difference between the main battery and the extended-range battery is greater than a safety threshold, the one with a lower state of charge of the main battery and the extended-range battery is charged alone; when the voltage difference between the main battery and the extended-range battery is not greater than the safety threshold, the charging mode is switched to charging the main battery and the extended-range battery at the same time; the switch control unit controls the connection between the main battery and the extended-range battery and the charging circuit based on the charging strategy instruction; when charging the one with a lower state of charge of the main battery and the extended-range battery alone, the one with a higher state of charge is disconnected from the charging circuit; when the charging mode is switched to charging the main battery and the extended-range battery at the same time, the main battery and the extended-range battery are connected to the charging circuit at the same time.

[0119] The state parameter unit is configured with a safety threshold range for each state parameter and each item in the temperature index and health index; the strategy instruction unit is configured with a battery protection strategy, which is as follows: when any state parameter or any item in the temperature index and health index of any battery in the main battery and the extended-range battery exceeds the corresponding safety threshold range, the connection between the battery and the other battery and the external circuit is cut off, and an alarm is issued to the management personnel. The functions of the above-mentioned electric skateboard extended-range battery system are as follows: Figure 2 shown.

[0120] Example 2

[0121] This embodiment is the second embodiment of the present invention; it is based on the same inventive concept as embodiment 1, Figure 4 This embodiment introduces a method for extending the range of an electric skateboard battery, comprising the following steps:

[0122] S1: Collecting trip information and status parameters of the main battery and the extended-range battery;

[0123] Among them, the trip information includes road information and skateboard working information; the state parameters include working temperature, open circuit voltage, internal resistance, and capacity index;

[0124] S2: performing data cleaning on the trip information, calculating trip parameters and constructing a trip data set;

[0125] The travel parameters include climbing index, braking frequency, and acceleration coefficient; any travel data in the travel data set includes travel information, travel parameters, travel date, and start time of a trip.

[0126] S3: training a neural network model for predicting travel parameters based on the travel data set;

[0127] The input of the neural network model is the date and start time of any trip; the output is the predicted value of each trip parameter of the trip;

[0128] S4: Calculate the predicted value of the trip parameter of the current trip based on the neural network model, and calculate the discharge threshold of the main battery of the current trip;

[0129] S5: formulating a power supply strategy for this trip based on the discharge threshold of the main battery of this trip;

[0130] S6: Calculate the temperature index and health index of the main battery, adjust the discharge threshold of the main battery, and generate a discharge strategy instruction based on the power supply strategy;

[0131] After the discharge threshold of the main battery is adjusted, the discharge threshold of the main battery involved in the power supply strategy is updated to the adjusted discharge threshold of the main battery, and other contents of the power supply strategy remain unchanged.

[0132] S7: Execute the discharge strategy instruction to supply power to the electric skateboard during this trip.

[0133] The specific functions of the above steps are implemented by referring to the relevant contents in the electric skateboard range-extending battery system described in Example 1, which will not be elaborated here.

[0134] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0135] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the purpose and scope of protection of the present invention, which are all within the protection of the present invention.

Claims

1. An electric skateboard range-extending battery system, characterized in that: Including battery module, data monitoring module, data storage module, strategy module, power supply control module; Wherein, the battery module includes a main battery and a range-extending battery, which are used to power the electric skateboard; The data monitoring module is used to collect travel information and status parameters of the main battery and the range-extending battery; The data storage module is used to store the travel information and construct a travel data set; The strategy module is used to formulate a power supply strategy based on the travel data set and adjust the power supply strategy based on the real-time status parameters of the main battery; The strategy module includes a strategy generation unit for formulating a power supply strategy in the following manner: The strategy generation unit calculates the discharge threshold of the main battery based on the travel data set, and formulates a power supply strategy based on the discharge threshold of the main battery; the method is as follows: S100: Calculating predicted values ​​of the trip parameters of this trip based on the neural network model; The input of the neural network model is the date and start time of any trip; the output is the predicted value of each trip parameter of the trip; S200: Calculate the discharge threshold of the main battery of this trip based on the predicted value of the trip parameter of this trip; the formula is as follows: ； Where S represents the discharge threshold of the main battery in this trip; A reference value for the discharge threshold of the main battery; Indicates the predicted value of braking frequency; represents the predicted value of the climbing index; represents the predicted value of the acceleration factor; represents the weight coefficient; S300: formulating a power supply strategy for this trip based on a discharge threshold of the main battery of this trip; The power supply strategy is as follows: When the remaining capacity of the main battery is greater than the discharge threshold of the main battery, the main battery independently supplies power to the electric skateboard; When the remaining capacity of the main battery is not greater than the discharge threshold, and the voltage difference between the main battery and the range-extending battery is not less than the safety threshold, the power supply mode is switched to the range-extending battery independently supplying power to the electric skateboard; When the remaining capacity of the main battery is not greater than the discharge threshold, and the voltage difference between the main battery and the range-extending battery is less than the safety threshold, the power supply mode is switched to the main battery and the range-extending battery simultaneously supplying power to the electric skateboard; The strategy module further includes a state parameter unit and a strategy adjustment unit; wherein the state parameter unit is used to calculate the temperature index and health index of the main battery and the extended-range battery; the strategy adjustment unit adjusts the discharge threshold of the main battery based on the temperature index and the health index, and generates a discharge strategy instruction; The temperature index is the average value of the working temperature of any battery; the calculation method is as follows: from the beginning of the trip, the working temperature of the battery is continuously collected within a time period of N and the average value is calculated as the temperature index of the battery; The calculation formula of the health index is as follows: ； Where H represents the health index of any battery; represents capacity index; U represents open circuit voltage; R represents internal resistance; Indicates the rated open circuit voltage; Indicates rated internal resistance; The formula for adjusting the discharge threshold of the main battery is as follows: ； in, Indicates the adjusted value of the discharge threshold of the main battery; Indicates the health index of the main battery; Indicates the temperature index of the main battery; represents the adjustment factor; The power supply control module is used to execute the power supply strategy and control the working status of the main battery and the range-extending battery.

2. The electric skateboard range-extending battery system according to claim 1, characterized in that: The trip information includes road information and skateboard working information; the data monitoring module includes a road information unit, a skateboard information unit, and a battery status unit; wherein: The road information unit is used to collect road information in real time, including the coordinates and slope information of each waypoint during the journey; The skateboard information unit is used to collect the skateboard working information in real time, including the braking record during the trip and the skateboard speed at each passing point; The battery status unit is used to collect status parameters of the main battery and the range-extending battery, and the status parameters include operating temperature, open-circuit voltage, internal resistance, and capacity index.

3. The electric skateboard range-extending battery system according to claim 2, characterized in that: The data storage module includes a data cleaning unit, a travel parameter unit, and a data set unit; wherein: The data cleaning unit is used to clean the travel information; The travel parameter unit calculates travel parameters based on the travel information after data cleaning, including climbing index, braking frequency, and acceleration coefficient; The data set unit constructs a travel data set based on the travel parameters; the method is as follows: The trip information, trip parameters, trip date, and trip start time of a trip are combined into one trip data; the trip data of each trip together constitute the trip data set.

4. The electric skateboard range-extending battery system according to claim 3, characterized in that: The method for calculating the climbing index by the travel parameter unit is as follows: reading the road information of any section of the journey, counting the uphill path length and the total path length of the journey and calculating the climbing index; the climbing index is the ratio of the uphill path length to the total path length; The method for calculating the braking frequency by the stroke parameter unit is as follows: reading the working information of the slide plate in any stroke, counting the number of braking times based on the braking records and calculating the braking frequency; the braking frequency is the ratio of the number of braking times to the total length of the stroke path; The method for the travel parameter unit to calculate the acceleration coefficient is as follows: read the skateboard working information of any section of the journey, identify the acceleration section based on the skateboard speed of each waypoint and calculate the acceleration coefficient; the acceleration coefficient is the ratio of the sum of the path lengths of all acceleration sections to the total path length of the journey.

5. The electric skateboard range-extending battery system according to claim 4, characterized in that: The power supply control module includes a strategy instruction unit, a battery monitoring unit, and a switch control unit; wherein: The strategy instruction unit is used to store discharge strategy instructions; The battery monitoring unit is used to monitor the state of charge of the main battery and the voltage difference between the main battery and the range-extending battery in real time; The switch control unit controls the connection between the main battery and the range-extending battery and the power supply circuit based on the discharge strategy instruction, specifically as follows: when the main battery independently supplies power to the electric skateboard, the range-extending battery is disconnected from the power supply circuit; when the power supply mode is switched to the range-extending battery independently supplying power to the electric skateboard, the range-extending battery is connected to the power supply circuit and the main battery is disconnected from the power supply circuit; when the power supply mode is switched to the main battery and the range-extending battery simultaneously supplying power to the electric skateboard, the main battery is connected to the power supply circuit.

6. The electric skateboard range-extending battery system according to claim 5, characterized in that: The strategy instruction unit is configured with a charging strategy instruction, which is as follows: when charging, when the voltage difference between the main battery and the range-extending battery is greater than a safety threshold, the one with a lower state of charge of the main battery and the range-extending battery is charged alone; when the voltage difference between the main battery and the range-extending battery is not greater than the safety threshold, the charging mode is switched to charging the main battery and the range-extending battery at the same time; The switch control unit controls the connection between the main battery and the extended-range battery and the charging circuit based on the charging strategy instruction; when the one with a lower state of charge among the main battery and the extended-range battery is charged alone, the one with a higher state of charge is disconnected from the charging circuit; when the charging mode is switched to charging the main battery and the extended-range battery at the same time, the main battery and the extended-range battery are connected to the charging circuit at the same time.

7. An electric skateboard range-extending battery method, which is implemented based on an electric skateboard range-extending battery system according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Collecting trip information and status parameters of the main battery and the extended-range battery; S2: performing data cleaning on the trip information, calculating trip parameters and constructing a trip data set; S3: training a neural network model for predicting travel parameters based on the travel data set; S4: Calculate the predicted value of the trip parameter of the current trip based on the neural network model, and calculate the discharge threshold of the main battery of the current trip; S5: formulating a power supply strategy for this trip based on the discharge threshold of the main battery of this trip; S6: Calculate the temperature index and health index of the main battery, adjust the discharge threshold of the main battery, and generate a discharge strategy instruction based on the power supply strategy; S7: Execute the discharge strategy instruction to supply power to the electric skateboard during this trip.

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