Power-off protection system of rechargeable battery

Abstract

The invention discloses a power-off protection system of a rechargeable battery, relates to the technical field of intelligent sports backpack rechargeable batteries, and adopts multiple modules to comprehensively analyze multiple factors such as battery material parameters, interface parameters and motion state influence factors, and the power-off protection of the rechargeable battery is realized by monitoring and evaluating the running state of the battery in real time. The power-off condition of the battery can be judged in time, so that the battery is effectively protected from being damaged. The intelligent sports backpack has the advantages that intelligent protection decision can be made according to the actual operation condition of the battery, the safety of the battery is improved, the service life of the battery is prolonged, more reliable power supply support is provided for a user, and therefore the overall performance and reliability of the intelligent sports backpack are improved, the operation state of the battery can be intelligently judged, therefore, power-off protection is performed in a targeted manner, the intelligent level of the system is improved, and different protection measures are taken by the system according to different battery operation states.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent sports backpack rechargeable batteries, and in particular to a power-off protection system for rechargeable batteries. Background Art

[0002] With the popularity of mobile devices and the increasing demand for mobile office and outdoor sports, smart sports backpacks have gradually become a popular accessory. They are usually equipped with built-in batteries to drive smart functions such as tablets, mobile phones, speakers, etc. During use, the battery power supply may be interrupted due to the external environment, improper operation or other reasons, which in turn affects the normal use of the smart sports backpack. Therefore, a power-off protection system based on the rechargeable battery of the smart sports backpack is needed.

[0003] Most of the smart sports backpacks in the prior art do not have an automatic power-off protection mechanism and cannot automatically cut off the power supply according to the charging status of the charging device, resulting in overcharging of the rechargeable battery. Obviously, this power-off protection system has at least the following problems: 1. The prior art lacks the ability to dynamically adjust the power-off protection threshold of the rechargeable battery according to the use and damage of the rechargeable battery of the smart running backpack. It cannot be dynamically adjusted according to actual usage and the health status of the battery, which may lead to overprotection or failure to protect the battery in time, affecting the battery life and performance, resulting in continued use when the battery is already damaged, increasing the risk of battery damage.

[0004] 2. The existing technology lacks real-time monitoring of the battery's operating parameters and the impact of people exercising with smart sports backpacks on the battery. It is unable to accurately assess the actual status of the battery, which may lead to inaccurate power-off protection measures. It lacks analysis of the battery's real-time operating parameters and cannot flexibly adjust the power-off protection measures according to actual conditions, which may lead to ineffective protection measures or over-protection.

[0005] 3. The existing technology is difficult to flexibly adjust the power-off protection measures of rechargeable batteries according to actual conditions. It is impossible to personalize the power-off protection settings according to different batteries, different usage environments and different usage habits, which may result in the protection measures not being suitable for the actual situation. Since the power-off protection measures are difficult to flexibly adjust, manual intervention or professional technicians may be required to make adjustments, which increases the cost and complexity of management and maintenance. Summary of the invention

[0006] In view of the above-mentioned technical deficiencies, an object of the present invention is to provide a power-off protection system for a rechargeable battery.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a power-off protection system for a rechargeable battery, including: a material parameter and interface parameter acquisition module, which is used to obtain the material parameters and interface parameters corresponding to the battery in the smart sports backpack of the target person in the current cycle, the material parameters include the surface roughness corresponding to each electrode material, the particle distribution density and the corresponding porosity between each particle, the interface parameters include the interface reaction rate, the electrolyte loss rate and the charge transfer impedance value, and the electrode material evaluation coefficient and interface stability evaluation coefficient corresponding to the battery in the smart sports backpack are obtained by analysis.

[0008] The standard battery operation evaluation coefficient interval analysis module is used to analyze the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack based on the electrode material evaluation coefficient and interface stability evaluation coefficient corresponding to the battery in the smart sports backpack, and then analyze the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack.

[0009] The motion state influencing factor acquisition module is used to set several collection time points when the battery in the smart sports backpack of the target person in the current cycle charges the electronic devices in the smart sports backpack, and then collect the motion state parameters corresponding to the battery in the smart sports backpack at each collection time point, the motion state parameters vibration frequency, impact frequency and light intensity, and analyze to obtain the motion state influencing factor corresponding to the battery in the smart sports backpack at each collection time point.

[0010] The battery charging operation parameter acquisition module is used to obtain the battery charging operation parameters corresponding to the battery in the smart sports backpack at each collection time point. The battery charging operation parameters include electrolyte concentration, oxygen content and vibration frequency. The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point is obtained by analysis.

[0011] The battery power-off protection status judgment module is used to judge the battery power-off protection status corresponding to the battery in the smart sports backpack at each collection time point according to the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point.

[0012] Preferably, the analysis obtains the evaluation coefficient of the electrode material corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: the surface roughness, particle distribution density and the void ratio between each particle corresponding to each electrode material corresponding to the battery in the smart sports backpack are recorded as qy, wy and Where y represents the number corresponding to each electrode material, y = 1, 2...n, k represents the number corresponding to each particle, k = 1, 2...u, n is any integer greater than 2, u is any integer greater than 2, substitute into the calculation formula

[0013] The electrode material evaluation coefficient α corresponding to the battery in the smart sports backpack is obtained, where q′, w′, and t′ are the standard surface roughness, standard particle distribution density, and standard porosity between particles corresponding to the set electrode material, respectively. are the weight factors corresponding to the set surface roughness of the electrode material, the weight factors corresponding to the particle distribution density, and the weight factors corresponding to the void ratio between particles, respectively. Δq, Δw, and Δt are the set allowable surface roughness difference of the electrode material, the allowable particle distribution density difference, and the allowable void ratio difference between particles, respectively.

[0014] Preferably, the analysis obtains the interface stability evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: the interface reaction rate, electrolyte loss rate and charge transfer impedance value corresponding to the battery in the smart sports backpack are recorded as r, p and d respectively, and substituted into the calculation formula

[0015]

[0016] The interface stability evaluation coefficient β corresponding to the battery in the smart sports backpack is obtained, wherein r′, p′, and d′ are the standard interface reaction rate, standard electrolyte loss rate, and standard charge transfer impedance value corresponding to the set battery, respectively; ν1, ν2, and ν3 are the weight factors corresponding to the set battery interface reaction rate, the weight factors corresponding to the electrolyte loss rate, and the weight factors corresponding to the charge transfer impedance value, respectively; Δr, Δp, and Δd are the set allowable battery interface reaction rate difference, the allowable electrolyte loss rate difference, and the allowable charge transfer impedance value difference, respectively.

[0017] Preferably, the analysis obtains the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: Substitute the electrode material evaluation coefficient and the interface stability evaluation coefficient corresponding to the battery in the smart sports backpack into the calculation formula The comprehensive loss evaluation coefficient γ corresponding to the battery in the smart sports backpack is obtained, where π1 and π2 are the weight factors corresponding to the set battery electrode material evaluation coefficient and the interface stability evaluation coefficient, respectively, and e represents a natural constant.

[0018] Preferably, the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack is analyzed, and the specific analysis process is as follows: the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack is compared with the comprehensive loss evaluation coefficient corresponding to each standard battery operation evaluation coefficient interval in the database; if the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack is the same as the comprehensive loss evaluation coefficient corresponding to a standard battery operation evaluation coefficient interval in the database, then the standard battery operation evaluation coefficient interval in the database is used as the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack.

[0019] Preferably, the analysis obtains the motion state influencing factors corresponding to the batteries in the smart sports backpack at each acquisition time point. The specific analysis process is as follows: the vibration frequency, impact frequency and light intensity corresponding to the batteries in the smart sports backpack at each acquisition time point are recorded as fg, hg and mg respectively, where g represents the number corresponding to each acquisition time point, g=1,2...z, z is any integer greater than 2, and is substituted into the calculation formula The motion state influence factor λ corresponding to the battery in the smart sports backpack at the gth acquisition time point is obtained g , where f′, h′, and m′ are the standard vibration frequency, standard impact frequency, and standard light intensity corresponding to the set battery, respectively; θ1, θ2, and θ3 are the weight factors corresponding to the set battery vibration frequency, impact frequency, and light intensity, respectively.

[0020] Preferably, the analysis obtains the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each acquisition time point. The specific analysis process is as follows: the electrolyte concentration, oxygen content and charging rate corresponding to the battery in the smart sports backpack at each acquisition time point are recorded as cg, bg and sg respectively, and substituted into the calculation formula The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at the gth acquisition time point is obtained Among them, c′, b′, and s′ are the standard electrolyte concentration, standard oxygen content, and standard charging rate corresponding to the set battery, respectively; ψ1, ψ2, and ψ3 are the weight factors corresponding to the set battery electrolyte concentration, the weight factor corresponding to the oxygen content, and the weight factor corresponding to the charging rate, respectively.

[0021] Preferably, the battery protection status of the battery in the smart sports backpack at each collection time point is determined, and the specific judgment process is as follows: A1, the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point is compared with the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is less than the minimum value of the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is operating normally and no power-off protection is required.

[0022] A2. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is within the standard battery operation evaluation coefficient range corresponding to the battery in the corresponding smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is overloaded and needs to be overloaded and powered off, and the target personnel are reminded to perform maintenance.

[0023] A3. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is greater than the maximum value of the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is operating abnormally and needs to be completely powered off for protection, and the target personnel are reminded to perform maintenance.

[0024] Preferably, the overload power-off protection is required, and the specific power-off protection process is as follows: if it is determined that the battery in the smart sports backpack is overloaded at the collection time point and overload power-off protection is required, the current value corresponding to each connected electronic device corresponding to the battery in the smart sports backpack at the collection time point is obtained, and the current values ​​corresponding to each connected electronic device corresponding to the battery in the smart sports backpack at the collection time point are sequentially powered off in descending order; when a connected electronic device corresponding to the battery in the smart sports backpack at the collection time point is powered off, the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack is re-analyzed until it is determined that the battery in the smart sports backpack is operating normally and does not need power-off protection.

[0025] The beneficial effects of the present invention are as follows: 1. The present invention provides a power-off protection system for a rechargeable battery, which adopts a multi-module comprehensive analysis of multiple factors such as battery material parameters, interface parameters, and motion state influencing factors. By real-time monitoring and evaluating the operating state of the battery, the power-off situation of the battery can be judged in time, thereby effectively protecting the battery from damage. Its advantage is that it can make intelligent protection decisions based on the actual operating conditions of the battery, improve the safety and service life of the battery, provide users with more reliable power support, and thus improve the overall performance and reliability of the smart sports backpack.

[0026] 2. The embodiment of the present invention obtains material parameters and interface parameters, and analyzes the comprehensive loss assessment coefficient of the battery, so as to have a more comprehensive understanding of the battery status and provide a more accurate basis for power-off protection. The system can perform personalized power-off protection settings according to the actual situation of the battery in the smart sports backpack, thereby improving the accuracy and adaptability of the protection measures.

[0027] 3. In the embodiment of the present invention, by analyzing the real-time operating parameters of the battery in the smart sports backpack, the system can monitor the operating status of the battery in real time, detect abnormalities in time and take corresponding measures to ensure the safe operation of the battery. According to the comparison between the battery operation evaluation coefficient and the standard range, the system can intelligently judge the operating status of the battery, including normal, overload or abnormal, so as to carry out power-off protection in a targeted manner, thereby improving the intelligence level of the system. According to different battery operating states, the system takes different protection measures, including overload power-off protection and complete power-off protection, which effectively prevents safety risks caused by battery problems and ensures the safety of users and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0029] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] Embodiments of the present invention Figure 1 As shown, a power-off protection system for a rechargeable battery includes: a material parameter and interface parameter acquisition module, a standard battery operation evaluation coefficient interval analysis module, a motion state influencing factor acquisition module, a battery charging operation parameter acquisition module, a battery power-off protection situation judgment module and a database.

[0032] The standard battery operation evaluation coefficient interval analysis module is respectively connected to the material parameter and interface parameter acquisition module and the motion state influencing factor acquisition module, the battery charging operation parameter acquisition module is respectively connected to the motion state influencing factor acquisition module and the battery power-off protection situation judgment module, and the database is connected to the standard battery operation evaluation coefficient interval analysis module and the battery power-off protection situation judgment module.

[0033] The material parameter and interface parameter acquisition module is used to obtain the material parameters and interface parameters corresponding to the battery in the smart sports backpack of the target person in the current cycle. The material parameters include the surface roughness corresponding to each electrode material, the particle distribution density and the corresponding porosity between each particle. The interface parameters include the interface reaction rate, the electrolyte loss rate and the charge transfer impedance value. The electrode material evaluation coefficient and interface stability evaluation coefficient corresponding to the battery in the smart sports backpack are obtained by analysis.

[0034] It should be noted that the target personnel's smart sports backpacks will be regularly sent to stores for testing. Store employees use scanning electron microscopes and other equipment to observe and measure the surface of the electrode material to obtain surface roughness data, observe the distribution of particles in the electrode material through a microscope, and use image processing technology to obtain the particle distribution density and the corresponding porosity between each particle.

[0035] It should also be noted that store employees use electrochemical testing methods such as cyclic voltammetry to study the interfacial reaction rate between electrode materials and electrolytes, and use electrochemical testing methods to monitor the loss of electrolyte during the charging and discharging process to obtain the electrolyte loss rate. They use testing methods such as AC impedance spectroscopy to measure the charge transfer impedance of the battery system and obtain the charge transfer impedance value.

[0036] In a specific embodiment, the analysis obtains the evaluation coefficient of the electrode material corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: the surface roughness, particle distribution density and the void ratio between each particle corresponding to each electrode material corresponding to the battery in the smart sports backpack are recorded as qy, wy and Where y represents the number corresponding to each electrode material, y = 1, 2...n, k represents the number corresponding to each particle, k = 1, 2...u, n is any integer greater than 2, u is any integer greater than 2, substitute into the calculation formula

[0037]

[0038] The electrode material evaluation coefficient α corresponding to the battery in the smart sports backpack is obtained, where q′, w′, and t′ are the standard surface roughness, standard particle distribution density, and standard porosity between particles corresponding to the set electrode material, respectively. are the weight factors corresponding to the set surface roughness of the electrode material, the weight factors corresponding to the particle distribution density, and the weight factors corresponding to the void ratio between particles, respectively. Δq, Δw, and Δt are the set allowable surface roughness difference of the electrode material, the allowable particle distribution density difference, and the allowable void ratio difference between particles, respectively.

[0039] It should be noted that Both are greater than 0 and less than 1.

[0040] It should also be noted that historical data of the battery in the smart sports backpack during use is collected, including parameter data such as the surface roughness of the electrode material, the particle distribution density, and the void ratio between the particles. The collected historical data is analyzed, and statistical indicators such as the mean and standard deviation are calculated through statistical methods, data mining techniques or machine learning algorithms. The standard surface roughness, particle distribution density and void ratio of the electrode material are set according to the distribution of historical data and statistical results. At the same time, according to the degree of influence of different parameters on battery performance in the historical data, weight factors of different parameters are set to reflect the importance of each parameter in the evaluation. The allowable difference is set by analyzing the variation range of electrode material parameters in the historical data and their influence on battery performance.

[0041] In another specific embodiment, the analysis obtains the interface stability evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: the interface reaction rate, electrolyte loss rate and charge transfer impedance value corresponding to the battery in the smart sports backpack are recorded as r, p and d respectively, and substituted into the calculation formula The interface stability evaluation coefficient β corresponding to the battery in the smart sports backpack is obtained, where r′, p′, and d′ are the standard interface reaction rate, standard electrolyte loss rate, and standard charge transfer impedance value corresponding to the set battery, respectively; ν1, ν2, and ν3 are the weight factors corresponding to the set battery interface reaction rate, the weight factors corresponding to the electrolyte loss rate, and the weight factors corresponding to the charge transfer impedance value, respectively; Δr, Δp, and Δd are the set allowable battery interface reaction rate difference, the allowable electrolyte loss rate difference, and the allowable charge transfer impedance value difference, respectively.

[0042] It should be noted that ν1, ν2, and ν3 are all greater than 0 and less than 1.

[0043] It should also be noted that historical data of the battery in the smart sports backpack during use is collected, including parameter data of interface reaction rate, electrolyte loss rate and charge transfer impedance value, and the collected historical data is analyzed. Statistical indicators such as mean value and standard deviation are calculated through statistical methods, data mining technology or machine learning algorithms. According to the distribution of historical data and statistical results, standard interface reaction rate, standard electrolyte loss rate and standard charge transfer impedance value are set. At the same time, according to the influence of different parameters on battery performance in historical data, weight factors of different parameters are set to reflect the importance of each parameter in the evaluation. The allowable difference is set by analyzing the variation range of interface reaction rate, electrolyte loss rate and charge transfer impedance value corresponding to the battery in historical data and the influence on battery stability.

[0044] The standard battery operation evaluation coefficient interval analysis module is used to analyze the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack based on the electrode material evaluation coefficient and interface stability evaluation coefficient corresponding to the battery in the smart sports backpack, and then analyze the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack.

[0045] In a specific embodiment, the analysis obtains the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: Substitute the electrode material evaluation coefficient and the interface stability evaluation coefficient corresponding to the battery in the smart sports backpack into the calculation formula The comprehensive loss evaluation coefficient γ corresponding to the battery in the smart sports backpack is obtained, where π1 and π2 are the weight factors corresponding to the set battery electrode material evaluation coefficient and the interface stability evaluation coefficient, respectively, and e represents a natural constant.

[0046] It should be noted that π1 and π2 are both greater than 0 and less than 1.

[0047] It should also be noted that historical data on the use of batteries in smart sports backpacks are collected, including data on electrode material evaluation coefficients, interface stability evaluation coefficients, and other relevant parameters. The historical data are analyzed to understand the relationship between different parameters and the degree of influence on battery performance. According to the analysis results of historical data and actual conditions, weight factors for the electrode material evaluation coefficient and the interface stability evaluation coefficient are set.

[0048] In another specific embodiment, the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack is analyzed, and the specific analysis process is as follows: the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack is compared with the comprehensive loss evaluation coefficient corresponding to each standard battery operation evaluation coefficient interval in the database; if the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack is the same as the comprehensive loss evaluation coefficient corresponding to a standard battery operation evaluation coefficient interval in the database, then the standard battery operation evaluation coefficient interval in the database is used as the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack.

[0049] The embodiments of the present invention obtain material parameters and interface parameters, and analyze the comprehensive loss assessment coefficient of the battery, so as to more comprehensively understand the state of the battery and provide a more accurate basis for power-off protection. The system can perform personalized power-off protection settings according to the actual situation of the battery in the smart sports backpack, thereby improving the accuracy and adaptability of the protection measures.

[0050] The motion state influencing factor acquisition module is used to set several collection time points when the battery in the smart sports backpack of the target person in the current cycle charges the electronic devices in the smart sports backpack, and then collect the motion state parameters corresponding to the battery in the smart sports backpack at each collection time point, the motion state parameters vibration frequency, impact frequency and light intensity, and analyze to obtain the motion state influencing factor corresponding to the battery in the smart sports backpack at each collection time point.

[0051] In a specific embodiment, the analysis obtains the motion state influencing factor corresponding to the battery in the smart sports backpack at each acquisition time point. The specific analysis process is as follows: the vibration frequency, impact frequency and light intensity corresponding to the battery in the smart sports backpack at each acquisition time point are recorded as fg, hg and mg respectively, where g represents the number corresponding to each acquisition time point, g = 1, 2...z, z is any integer greater than 2, and is substituted into the calculation formula The motion state influence factor λ corresponding to the battery in the smart sports backpack at the gth acquisition time point is obtained g, where f′, h′, and m′ are the standard vibration frequency, standard impact frequency, and standard light intensity corresponding to the set battery, respectively; θ1, θ2, and θ3 are the weight factors corresponding to the set battery vibration frequency, impact frequency, and light intensity, respectively.

[0052] It should be noted that θ1, θ2, and θ3 are all greater than 0 and less than 1.

[0053] It should also be noted that historical data of the battery in the smart sports backpack during use is collected, including the vibration frequency, impact frequency and light intensity parameter data corresponding to the battery, and the collected historical data is analyzed. Statistical indicators such as the mean and standard deviation are calculated through statistical methods, data mining techniques or machine learning algorithms. According to the distribution of historical data and statistical results, the standard vibration frequency, standard impact frequency and standard light intensity are set. At the same time, according to the degree of influence of different parameters on the battery in the historical data, weight factors of different parameters are set to reflect the importance of each parameter in the evaluation. The allowable difference is set by analyzing the variation range of the vibration frequency, impact frequency and light intensity corresponding to the battery in the historical data and the influence on the battery stability.

[0054] The battery charging operation parameter acquisition module is used to obtain the battery charging operation parameters corresponding to the battery in the smart sports backpack at each collection time point. The battery charging operation parameters include electrolyte concentration, oxygen content and vibration frequency. The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point is obtained by analysis.

[0055] In a specific embodiment, the analysis obtains the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each acquisition time point. The specific analysis process is as follows: the electrolyte concentration, oxygen content and charging rate corresponding to the battery in the smart sports backpack at each acquisition time point are recorded as cg, bg and sg respectively, and substituted into the calculation formula The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at the gth acquisition time point is obtained Among them, c′, b′, and s′ are the standard electrolyte concentration, standard oxygen content, and standard charging rate corresponding to the set battery, respectively; ψ1, ψ2, and ψ3 are the weight factors corresponding to the set battery electrolyte concentration, the weight factor corresponding to the oxygen content, and the weight factor corresponding to the charging rate, respectively.

[0056] It should be noted that ψ1, ψ2, and ψ3 are all greater than 0 and less than 1.

[0057] It should also be noted that historical data of the battery in the smart sports backpack during use is collected, including the electrolyte concentration, oxygen content and charging rate parameter data corresponding to the battery, and the collected historical data is analyzed. Statistical indicators such as the mean and standard deviation are calculated through statistical methods, data mining techniques or machine learning algorithms. According to the distribution of historical data and statistical results, the standard electrolyte concentration, standard oxygen content and standard charging rate are set. At the same time, according to the degree of influence of different parameters on the battery in the historical data, weight factors of different parameters are set to reflect the importance of each parameter in the evaluation. The allowable difference is set by analyzing the variation range of the electrolyte concentration, oxygen content and charging rate corresponding to the battery in the historical data and the influence on battery stability.

[0058] The battery power-off protection status judgment module is used to judge the battery power-off protection status corresponding to the battery in the smart sports backpack at each collection time point according to the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point.

[0059] In a specific embodiment, the battery protection status of the battery in the smart sports backpack at each collection time point is determined, and the specific judgment process is as follows: A1. The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point is compared with the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is less than the minimum value of the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is operating normally and does not need power-off protection.

[0060] A2. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is within the standard battery operation evaluation coefficient range corresponding to the battery in the corresponding smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is overloaded and needs to be overloaded and powered off, and the target personnel are reminded to perform maintenance.

[0061] A3. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is greater than the maximum value of the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is operating abnormally and needs to be completely powered off for protection, and the target personnel are reminded to perform maintenance.

[0062] It should be noted that the overload power-off protection is to prevent the battery from continuing to work in an overloaded state, which may cause battery overheating, damage or even safety problems. It will trigger the overload power-off protection mechanism, that is, disconnect the battery from a load device to stop the battery from supplying power to its load device, thereby avoiding the continued occurrence of overload.

[0063] Complete power-off protection is designed to deal with abnormal battery operation. In order to prevent the battery from continuing to operate and possibly causing more serious failures or safety problems, the complete power-off protection will cut off the battery's power supply, that is, completely stop the battery from working.

[0064] In another specific embodiment, the overload power-off protection is required, and the specific power-off protection process is as follows: if it is determined that the battery in the smart sports backpack is overloaded at the collection time point and overload power-off protection is required, the current value corresponding to each connected electronic device corresponding to the battery in the smart sports backpack at the collection time point is obtained, and the current values ​​corresponding to each connected electronic device corresponding to the battery in the smart sports backpack at the collection time point are sequentially powered off in descending order; when a connected electronic device corresponding to the battery in the smart sports backpack at the collection time point is powered off, the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack is re-analyzed until it is determined that the battery in the smart sports backpack is operating normally and does not need power-off protection.

[0065] In the embodiment of the present invention, by analyzing the real-time operating parameters of the battery in the smart sports backpack, the system can monitor the operating status of the battery in real time, discover abnormalities in time and perform corresponding processing to ensure the safe operation of the battery. According to the comparison between the battery operation evaluation coefficient and the standard range, the system can intelligently judge the operating status of the battery, including normal, overload or abnormal, so as to carry out power-off protection in a targeted manner, thereby improving the intelligence level of the system. According to different battery operating states, the system takes different protection measures, including overload power-off protection and complete power-off protection, which effectively prevents safety risks caused by battery problems and ensures the safety of users and equipment.

[0066] The present invention provides a power-off protection system for a rechargeable battery, which uses a multi-module comprehensive analysis of multiple factors such as battery material parameters, interface parameters, and motion state influencing factors. By real-time monitoring and evaluating the operating state of the battery, the power-off situation of the battery can be judged in time, thereby effectively protecting the battery from damage. Its advantage is that it can make intelligent protection decisions based on the actual operating conditions of the battery, improve the safety and service life of the battery, provide users with more reliable power support, and thus improve the overall performance and reliability of the smart sports backpack.

[0067] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field 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 in this specification, they should all fall within the protection scope of the present invention.

Claims

1. A power-off protection system for a rechargeable battery, characterized in that: include: The material parameter and interface parameter acquisition module is used to obtain the material parameters and interface parameters corresponding to the battery in the smart sports backpack of the target person in the current cycle. The material parameters include the surface roughness corresponding to each electrode material, the particle distribution density and the corresponding void ratio between each particle. The interface parameters include the interface reaction rate, the electrolyte loss rate and the charge transfer impedance value. The electrode material evaluation coefficient and interface stability evaluation coefficient corresponding to the battery in the smart sports backpack are obtained by analysis. A standard battery operation evaluation coefficient interval analysis module is used to analyze and obtain the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack according to the electrode material evaluation coefficient and the interface stability evaluation coefficient corresponding to the battery in the smart sports backpack, and then analyze the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack; The motion state influencing factor acquisition module is used to set a number of collection time points when the battery in the smart sports backpack of the target person in the current cycle charges the electronic devices in the smart sports backpack, and then collect the motion state parameters corresponding to the battery in the smart sports backpack at each collection time point, the motion state parameters vibration frequency, impact frequency and light intensity, and analyze and obtain the motion state influencing factor corresponding to the battery in the smart sports backpack at each collection time point; The battery charging operation parameter acquisition module is used to acquire the battery charging operation parameters corresponding to the battery in the smart sports backpack at each acquisition time point. The battery charging operation parameters include electrolyte concentration, oxygen content and vibration frequency. The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each acquisition time point is obtained by analysis. The battery power-off protection status judgment module is used to judge the battery power-off protection status corresponding to the battery in the smart sports backpack at each collection time point according to the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point.

2. A power-off protection system for a rechargeable battery as claimed in claim 1, characterized in that: The analysis obtains the electrode material evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: The surface roughness, particle distribution density and the void ratio between particles of each electrode material corresponding to the battery in the smart sports backpack are recorded as qy, wy and Where y represents the number corresponding to each electrode material, y = 1, 2...n, k represents the number corresponding to each particle, k = 1, 2...u, n is any integer greater than 2, u is any integer greater than 2, substitute into the calculation formula The electrode material evaluation coefficient α corresponding to the battery in the smart sports backpack is obtained, where q′, w′, and t′ are the standard surface roughness, standard particle distribution density, and standard porosity between particles corresponding to the set electrode material, respectively. are the weight factors corresponding to the set surface roughness of the electrode material, the weight factors corresponding to the particle distribution density, and the weight factors corresponding to the void ratio between particles, respectively. Δq, Δw, and Δt are the set allowable surface roughness difference of the electrode material, the allowable particle distribution density difference, and the allowable void ratio difference between particles, respectively.

3. A power-off protection system for a rechargeable battery as claimed in claim 2, characterized in that: The analysis results in the interface stability evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: The interface reaction rate, electrolyte loss rate and charge transfer impedance value corresponding to the battery in the smart sports backpack are recorded as r, p and d respectively, and substituted into the calculation formula The interface stability evaluation coefficient β corresponding to the battery in the smart sports backpack is obtained, where r′, p′, and d′ are the standard interface reaction rate, standard electrolyte loss rate, and standard charge transfer impedance value corresponding to the set battery, respectively; ν1, ν2, and ν3 are the weight factors corresponding to the set battery interface reaction rate, the weight factors corresponding to the electrolyte loss rate, and the weight factors corresponding to the charge transfer impedance value, respectively; Δr, Δp, and Δd are the set allowable battery interface reaction rate difference, the allowable electrolyte loss rate difference, and the allowable charge transfer impedance value difference, respectively.

4. A power-off protection system for a rechargeable battery as claimed in claim 3, characterized in that: The analysis obtains the comprehensive loss evaluation coefficient corresponding to the battery in the smart sports backpack. The specific analysis process is as follows: Substitute the electrode material evaluation coefficient and interface stability evaluation coefficient corresponding to the battery in the smart sports backpack into the calculation formula The comprehensive loss evaluation coefficient γ corresponding to the battery in the smart sports backpack is obtained, where π1 and π2 are the weight factors corresponding to the set battery electrode material evaluation coefficient and the interface stability evaluation coefficient, respectively, and e represents a natural constant.

5. A power-off protection system for a rechargeable battery as claimed in claim 4, characterized in that: The standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack is analyzed, and the specific analysis process is as follows: The comprehensive loss assessment coefficient corresponding to the battery in the smart sports backpack is compared with the comprehensive loss assessment coefficient corresponding to each standard battery operation assessment coefficient interval in the database. If the comprehensive loss assessment coefficient corresponding to the battery in the smart sports backpack is the same as the comprehensive loss assessment coefficient corresponding to a standard battery operation assessment coefficient interval in the database, the standard battery operation assessment coefficient interval in the database will be used as the standard battery operation assessment coefficient interval corresponding to the battery in the smart sports backpack.

6. A power-off protection system for a rechargeable battery as claimed in claim 1, characterized in that: The analysis obtains the motion state influencing factors corresponding to the batteries in the smart sports backpack at each acquisition time point. The specific analysis process is as follows: The vibration frequency, impact frequency and light intensity corresponding to the battery in the smart sports backpack at each acquisition time point are recorded as fg, hg and mg respectively, where g represents the number corresponding to each acquisition time point, g = 1, 2...z, z is any integer greater than 2, and is substituted into the calculation formula The motion state influence factor λ corresponding to the battery in the smart sports backpack at the gth acquisition time point is obtained g , where f′, h′, and m′ are the standard vibration frequency, standard impact frequency, and standard light intensity corresponding to the set battery, respectively; θ1, θ2, and θ3 are the weight factors corresponding to the set battery vibration frequency, impact frequency, and light intensity, respectively.

7. A power-off protection system for a rechargeable battery as claimed in claim 6, characterized in that: The analysis obtains the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each acquisition time point. The specific analysis process is as follows: The electrolyte concentration, oxygen content and charging rate of the battery in the smart sports backpack at each acquisition time point are recorded as cg, bg and sg respectively, and substituted into the calculation formula The battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at the gth acquisition time point is obtained Among them, c′, b′, and s′ are the standard electrolyte concentration, standard oxygen content, and standard charging rate corresponding to the set battery, respectively; ψ1, ψ2, and ψ3 are the weight factors corresponding to the set battery electrolyte concentration, the weight factor corresponding to the oxygen content, and the weight factor corresponding to the charging rate, respectively.

8. A power-off protection system for a rechargeable battery as claimed in claim 7, characterized in that: The specific judgment process of judging the battery protection status of the battery in the smart sports backpack at each collection time point is as follows: A1. Compare the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at each collection time point with the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is less than the minimum value of the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is operating normally and does not need to be powered off for protection; A2. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is within the standard battery operation evaluation coefficient interval corresponding to the battery in the corresponding smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is overloaded and needs to be overloaded and powered off, and the target personnel are reminded to perform maintenance; A3. If the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack at a certain collection time point is greater than the maximum value of the standard battery operation evaluation coefficient interval corresponding to the battery in the smart sports backpack in the database, it is determined that the battery in the smart sports backpack at the collection time point is operating abnormally and needs to be completely powered off for protection, and the target personnel are reminded to perform maintenance.

9. A power-off protection system for a rechargeable battery as claimed in claim 8, characterized in that: The overload power-off protection is required, and the specific power-off protection process is as follows: If it is determined that the battery in the smart sports backpack is overloaded at the collection time point and needs to be overloaded and powered off for protection, the current values ​​of each connected electronic device corresponding to the battery in the smart sports backpack at the collection time point are obtained, and the current values ​​of each connected electronic device corresponding to the battery in the smart sports backpack at the collection time point are sequentially powered off in descending order; when one of the connected electronic devices corresponding to the battery in the smart sports backpack at the collection time point is powered off, the battery operation evaluation coefficient corresponding to the battery in the smart sports backpack is re-analyzed until it is determined that the battery in the smart sports backpack is operating normally and does not need to be powered off for protection.

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