A lithium primary battery health management method and system

Abstract

The present invention relates to the technical field of health management of lithium primary batteries, and proposes a health management method and system for lithium primary batteries, including: connecting the health management system with the managed lithium primary battery pack through a detection cable assembly, connecting the positive and negative terminals of the battery module, and setting working parameters; collecting open circuit voltage data, and generating an alarm signal when the open circuit voltage is lower than a preset threshold; collecting load voltage data, and activating the battery when the load voltage does not meet the preset requirements; collecting temperature and humidity data of the battery pack, and generating an alarm signal when the temperature or humidity exceeds a preset threshold; monitoring the gas concentration in the box of the battery pack, and generating an alarm signal when the gas concentration exceeds the preset threshold; collecting parameter data of the battery pack, storing and analyzing the parameter data, and outputting it; when an abnormality is detected during the monitoring process, generating abnormal data information, and sending it to a display device for display. The present invention improves the safety and use efficiency of lithium primary batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium primary battery health management, and in particular to a lithium primary battery health management method and system. Background Art

[0002] With the continuous development of power technology, lithium primary batteries have been widely used in various fields as important energy supply equipment. However, during long-term storage, lithium primary batteries often experience problems such as voltage drop and electrical performance degradation due to self-discharge and battery passivation, which affect the normal use of the battery. Therefore, real-time monitoring and management of the health status of lithium primary batteries is of great significance to improving the efficiency and safety of battery use.

[0003] Lithium primary batteries are widely used in military equipment, emergency power supply, special equipment, etc. due to their high energy density, long storage period and excellent low temperature performance. With the continuous expansion of the application scale, the safe and reliable operation of lithium primary batteries is directly related to the normal operation and safety of equipment.

[0004] In the prior art, there are few battery management systems developed for lithium primary batteries. The management methods for lithium primary batteries mainly adopt single parameter monitoring or simple multi-parameter detection methods. The methods usually only focus on the voltage parameters of the battery, or only perform simple temperature monitoring, and lack systematic health management solutions. At the same time, the existing monitoring systems often use fixed threshold judgments, which cannot achieve intelligent management and timely warnings, and lack effective battery performance recovery methods. Summary of the invention

[0005] In view of this, the present invention proposes a lithium primary battery health management method and system, which solves the problem that the prior art often uses fixed threshold judgment, cannot achieve intelligent management and timely warning, and lacks effective battery performance recovery means.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a lithium primary battery health management method, characterized in that it includes the following steps:

[0007] Connect the health management system to the managed lithium primary battery pack through the detection cable assembly, connect the positive and negative terminals of the battery module, and set the working parameters;

[0008] Collecting open circuit voltage data of the battery pack, battery module and battery module branch according to a preset period, storing the open circuit voltage data, and generating an open circuit voltage alarm signal when the open circuit voltage is lower than a preset threshold;

[0009] Collect load voltage data of battery packs, battery modules and battery module branches according to preset cycles, and activate the battery when the load voltage does not meet the preset requirements;

[0010] Collect temperature and humidity data of the battery pack and generate temperature and humidity alarm signals when the temperature or humidity exceeds the preset threshold;

[0011] Monitor the gas concentration of sulfur dioxide or hydrogen sulfide in the battery pack box, determine battery leakage when the gas concentration exceeds a preset threshold, and generate a gas leakage alarm signal;

[0012] The segmented activation method is adopted to activate the battery module by selecting the activation branch. During the activation process, voltage detection, activation operation and recovery operation are performed in sequence until the voltage of the battery module reaches the preset requirement;

[0013] Collect parameter data of the battery pack at preset time intervals, the parameter data including voltage, temperature, humidity and gas concentration data, store and analyze the parameter data, and output the analysis results to a display device and an alarm device;

[0014] When an abnormality is detected during the monitoring process, abnormal data information is generated, the abnormal data information is sent to a display device for display, and an alarm device is activated to send an abnormal alarm signal.

[0015] On the basis of the above technical solution, preferably, the health management system is connected to the managed lithium primary battery pack through the detection cable assembly, the positive and negative terminals of the battery module are connected, and the working parameters are set, which specifically includes:

[0016] Connecting the health management system to the managed lithium primary battery pack through a detection cable assembly, wherein the detection cable assembly includes an activation detection cable, an inner box connection cable, a detection preset cable, and an activation resistor connection cable;

[0017] The operating parameters include a battery open circuit voltage determination value, a battery operating voltage determination value, a battery temperature determination value, a leakage gas concentration threshold, a detection cycle, a humidity determination value, an open circuit voltage offset, and an operating voltage offset.

[0018] On the basis of the above technical solution, preferably, the open circuit voltage data of the battery pack, the battery module and the battery module branch are collected according to a preset period, the open circuit voltage data is stored, and an open circuit voltage alarm signal is generated when the open circuit voltage is lower than a preset threshold, specifically including:

[0019] Collect the open circuit voltage data of the battery pack, battery module and battery module branch, perform multiple sampling on each branch, and record the first open circuit voltage collection value of the ith branch of the nth module as The mth open circuit voltage acquisition value of the ith branch of the nth module is recorded as Calculate the open circuit voltage value of the i-th branch of the n-th module Open circuit voltage of the nth module The open circuit voltage of the battery pack is V = V 1 +V 2 +...+V n .

[0020] On the basis of the above technical solution, preferably, the load voltage data of the battery pack, battery module and battery module branch are collected according to a preset period, and the battery activation is performed when the load voltage does not meet the preset requirements, specifically including:

[0021] Collect the load voltage data of the battery pack, battery module and battery module branch, perform multiple sampling on each branch, and record the first load voltage collection value of the i-th branch of the n-th module as The mth load voltage acquisition value of the ith branch of the nth module is recorded as Calculate the load voltage value of the i-th branch of the n-th module Load voltage of the nth module Load voltage of battery pack The average load voltage of the battery pack, battery module and battery module branch is calculated and compared with the preset threshold value, and the battery is activated when the load voltage is unqualified.

[0022] On the basis of the above technical solution, preferably, the collecting of temperature and humidity data of the battery pack and generating a temperature and humidity alarm signal when the temperature or humidity exceeds a preset threshold value specifically includes:

[0023] Collect the temperature data of each module of the battery pack. The temperature sensor is installed at the center of the battery module to analyze and determine the collected temperature data;

[0024] The collected temperature value is recorded as According to the working environment characteristics of the battery pack, the natural environment temperature is set to T0, and the upper limit of the battery pack temperature is set to C1; or When the battery pack temperature is abnormal, a temperature alarm signal is generated, and an alarm message is displayed on a display device;

[0025] Collecting humidity data in the battery pack box, wherein the humidity sensor is installed in the battery pack box, and analyzing and determining the collected humidity data;

[0026] The collected humidity value is recorded as According to the working environment characteristics of the battery pack, the upper limit of the battery pack humidity is set to D1; when When the humidity in the battery pack is abnormal, a humidity alarm signal is generated and an alarm message is displayed on the display device.

[0027] On the basis of the above technical solution, preferably, the gas concentration of sulfur dioxide or hydrogen sulfide in the box of the monitoring battery pack is determined to be battery leakage when the gas concentration exceeds a preset threshold, and a gas leakage alarm signal is generated, which specifically includes:

[0028] Collect sulfur dioxide or hydrogen sulfide gas concentration data in the battery pack box, sample the gas concentration multiple times, the sulfur dioxide or hydrogen sulfide gas sensor is installed in the battery pack box, the first gas concentration collection value is recorded as PM1, the second gas concentration collection value is recorded as PM2, and the mth gas concentration collection value is recorded as PM m , the gas concentration collection value is detected by a chemical sensor or an infrared sensor, and the collected data is sent back to a data storage device for storage;

[0029] Calculate the average gas concentration in the battery pack box and compare it with the preset threshold to generate a gas leakage alarm signal;

[0030] Calculate the average gas concentration in the battery pack, and set the qualified judgment value of sulfur dioxide or hydrogen sulfide gas concentration in the battery pack to E1 according to the chemical properties of the battery pack. When the average gas concentration is not less than E1, the battery pack is judged to have leakage, and the alarm device is activated to send out a gas leakage alarm signal.

[0031] On the basis of the above technical solution, preferably, the segmented activation method is adopted to activate the battery module by selecting the activation branch, and the voltage detection, activation operation and recovery operation are performed in sequence during the activation process until the voltage of the battery module reaches the preset requirement, which specifically includes:

[0032] The battery module branch is tested for an initial state. In the initial state, switches S1 to S n and switch S jh All are in disconnected state, and the open circuit voltage of each branch is detected in turn;

[0033] In the initial state, first close switch S1 to detect the open circuit voltage of branch 1 and then open the switch, and then switch S2 to S n Perform the same operation to detect the open circuit voltages of branches 2 to n, and complete the initial state detection of all branches; the open circuit voltage detection data is used to determine whether an activation operation is required;

[0034] Execute battery activation operation by controlling switches S1 to S n and switch S jh The on-off state of each branch is activated, the voltage is detected and the recovery operation is performed in sequence, and the activation operation is repeated multiple times;

[0035] Close switches S1 and S jh , activate branch 1, detect the activation voltage and activation current of branch 1, and disconnect S after activation is completed jh Restore and close S after recovery is completed. jh Detect the recovery voltage of branch 1 and then disconnect S jh and S1; then S2~S n and S jh Perform the same operation to activate branch 2 to branch n, and detect the branch activation voltage, activation current and recovery voltage; repeat the activation process until the voltage of the battery module reaches the preset requirement.

[0036] On the basis of the above technical solution, preferably, the parameter data of the battery pack is collected at a preset time interval, the parameter data includes voltage, temperature, humidity and gas concentration data, the parameter data is stored and analyzed, and the analysis results are output to a display device and an alarm device, specifically including:

[0037] With the initial preset time as the time base point 0, monitoring is started at the preset time interval to collect the voltage, temperature, humidity and gas concentration data of the battery pack;

[0038] The parameter data include battery pack open circuit voltage, battery module open circuit voltage, battery module branch open circuit voltage, battery pack load voltage, battery module load voltage, battery module branch load voltage, battery pack temperature, battery pack humidity, and sulfur dioxide or hydrogen sulfide gas concentration in the battery pack box;

[0039] The collected parameter data is stored and analyzed, the system operating frequency is adjusted, and the analysis results are sent to the display module and the alarm module.

[0040] On the basis of the above technical solution, preferably, when an abnormality is detected during the monitoring process, abnormal data information is generated, the abnormal data information is sent to a display device for display, and an alarm device is started to send an abnormal alarm signal, specifically including:

[0041] Monitor the working status of the battery pack in real time, determine whether there are abnormal voltage, temperature, humidity or gas concentration, and generate abnormal data information;

[0042] The abnormal data information is sent to the display device and the alarm device, the abnormal information is displayed through the LCD display module, and the sound and light alarm device is activated to send an alarm signal;

[0043] The abnormal information displayed by the LCD display module includes the corresponding number of the battery module, the abnormal type, the abnormal parameter value, and the battery health status; the alarm device includes an acoustic alarm component and a light alarm component, the acoustic alarm component includes a source buzzer, and the light alarm component includes an LED indicator light.

[0044] On the other hand, the present invention also provides a lithium primary battery health management system, the system comprising:

[0045] A mechanical assembly, wherein the mechanical assembly comprises an outer box, an inner box and a connecting cable, wherein the outer box is composed of an outer box body, a display screen, a page up button, a page down button, a liquid crystal power supply, a drive board, an activation indicator light, an undervoltage indicator light, a buzzer, a preset interface and a rear cover plate, and the inner box is composed of an inner box body, an inner box cover plate assembly, a detection resistor and a connecting socket;

[0046] An integrated control module, which includes a main control module, a detection preset module, a storage module, a clock module and an AD acquisition module, and is used to control the system's periodic power-on and power-off, clock cycle control, data storage and parameter preset;

[0047] An alarm module, the alarm module comprising an acoustic alarm component and a light alarm component, the acoustic alarm component adopts an active buzzer, and the light alarm component adopts an LED indicator light;

[0048] LCD display module, used to display system data and information;

[0049] A switch assembly, wherein the switch assembly comprises a power switch assembly and an LCD switch assembly;

[0050] Detection cable assembly, used to connect the battery management system and the managed battery pack;

[0051] Leakage gas sensor assembly, used to monitor the concentration of sulfur dioxide or hydrogen sulfide gas in the battery pack box;

[0052] Temperature and humidity sensor assembly, used to monitor the temperature and humidity of the battery pack.

[0053] The lithium primary battery health management method and system of the present invention have the following beneficial effects compared with the prior art:

[0054] (1) Through real-time collection and analysis of voltage, temperature, humidity, and gas concentration, battery anomalies are detected in time and alarm signals are generated. The battery module is activated in a segmented activation mode to effectively restore battery performance. The integrated control module is used to store and analyze data, optimize system power consumption and extend battery life. In combination with display devices and alarm devices, intuitive abnormal information and sound and light alarms are provided, which improves the safety, reliability, and efficiency of lithium primary batteries.

[0055] (2) Multiple sampling and multi-level threshold determination of the open-circuit voltage of the battery pack, battery module and branch circuits improves the accuracy and reliability of the data. Multi-level determination thresholds, including branch open-circuit voltage, module open-circuit voltage and battery pack open-circuit voltage, are used to ensure the comprehensiveness of monitoring. When the open-circuit voltage is found to be unqualified, an alarm signal is generated in time, effectively preventing the safety hazards caused by abnormal battery performance and realizing accurate monitoring and abnormal judgment of open-circuit voltage.

[0056] (3) By collecting the temperature data of each module of the battery pack and the humidity data in the box, and using the temperature sensor installed at the center of the battery module and the humidity sensor in the box, the collected data is analyzed and judged, and abnormal temperature or humidity of the battery pack is discovered in time, and a temperature and humidity alarm signal is generated and the abnormal information is visually displayed through the display device. At the same time, the alarm device is activated to sound an alarm, thereby effectively preventing the battery performance degradation or safety hazards caused by abnormal temperature and humidity, improving the safety of battery pack operation, and realizing accurate monitoring of the temperature and humidity status of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] 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.

[0058] Figure 1 This is a flow chart of a lithium primary battery health management method of the present invention;

[0059] Figure 2 This is a block diagram of a lithium primary battery health management system of the present invention;

[0060] Figure 3 This is a schematic diagram of the control of a main control module of a lithium primary battery health management system of the present invention;

[0061] Figure 4 This is a schematic structural diagram of a lithium primary battery health management system of the present invention. DETAILED DESCRIPTION

[0062] The following will be combined with 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.

[0063] See also Figure 1 The present invention provides a lithium primary battery health management method, comprising the following steps:

[0064] Connect the health management system to the managed lithium primary battery pack through the detection cable assembly, connect the positive and negative terminals of the battery module, and set the working parameters, which include voltage judgment value, temperature judgment value, humidity judgment value, gas concentration threshold and detection cycle;

[0065] Collecting open circuit voltage data of the battery pack, battery module and battery module branch according to a preset period, storing the open circuit voltage data, and generating an open circuit voltage alarm signal when the open circuit voltage is lower than a preset threshold;

[0066] Collect load voltage data of battery packs, battery modules and battery module branches according to preset cycles, and activate batteries to restore battery performance when the load voltage does not meet preset requirements;

[0067] Collect temperature and humidity data of the battery pack and generate temperature and humidity alarm signals when the temperature or humidity exceeds the preset threshold;

[0068] Monitor the gas concentration of sulfur dioxide or hydrogen sulfide in the battery pack box, calculate the average value of the gas concentration, determine the battery leakage when the gas concentration exceeds the preset threshold, and generate a gas leakage alarm signal;

[0069] The segmented activation method is adopted to activate the battery module by selecting the activation branch. During the activation process, voltage detection, activation operation and recovery operation are performed in sequence until the voltage of the battery module reaches the preset requirement;

[0070] Collect parameter data of the battery pack at preset time intervals, the parameter data including voltage, temperature, humidity and gas concentration data, store and analyze the parameter data, and output the analysis results to a display device and an alarm device;

[0071] When an abnormality is detected during the monitoring process, abnormal data information is generated, the abnormal data information is sent to a display device for display, and an alarm device is activated to send an abnormal alarm signal.

[0072] Specifically, this embodiment timely detects battery abnormalities and generates alarm signals through real-time collection and analysis of voltage, temperature, humidity, and gas concentration, activates the battery module by a segmented activation method, effectively restores battery performance, and uses an integrated control module to store and analyze data, optimize system power consumption and extend battery life. It combines display devices and alarm devices to provide intuitive abnormal information and sound and light alarms, thereby improving the safety, reliability, and utilization efficiency of lithium primary batteries.

[0073] The health management system is connected to the managed lithium primary battery pack through the detection cable assembly, the positive and negative terminals of the battery module are connected, and the working parameters are set, specifically including:

[0074] Connecting the health management system to the managed lithium primary battery pack through a detection cable assembly, wherein the detection cable assembly includes an activation detection cable, an inner box connection cable, a detection preset cable, and an activation resistor connection cable;

[0075] The activation detection cable is composed of n connectors, n = {1, 2, ..., n}, which are divided into battery positive electrode connection cables (n) and battery negative electrode connection cables (n). The managed lithium primary battery pack is composed of n battery modules, and the battery positive electrode connection cable and the battery negative electrode connection cable are used to connect the n positive terminals and n negative terminals of the battery pack module respectively; the battery module is composed of m series branches, m = {1, 2, ..., m}, and each series branch is composed of j single cells connected in series, j = {1, 2, ..., j};

[0076] Setting working parameters, wherein the working parameters include a battery open circuit voltage determination value, a battery operating voltage determination value, a battery temperature determination value, a leakage gas concentration threshold, a detection cycle, a humidity determination value, an open circuit voltage offset, and an operating voltage offset;

[0077] One end of the detection preset cable is connected to the signal interface of the outer box, and the other end is connected to the host computer system, which is used for setting the working parameters of the lithium primary battery health management system; the activation resistor connection cable is composed of k branches, which are respectively connected to the resistors of 1 to k activation circuits, and the power of the selected activation resistor is greater than the power of the battery branch when it works continuously.

[0078] Specifically, this embodiment connects the health management system to the lithium primary battery pack through a detection cable assembly, and adopts a variety of connection methods including an activation detection cable, an inner box connection cable, a detection preset cable and an activation resistor connection cable, thereby achieving efficient connection and multi-parameter monitoring of the battery pack, being able to accurately collect the operating data of the battery pack, supporting the activation operation of the battery module, ensuring the stability and reliability of the battery health management system, and improving the compatibility and applicability.

[0079] The collecting of open circuit voltage data of the battery pack, the battery module and the battery module branch according to a preset period, storing the open circuit voltage data, and generating an open circuit voltage alarm signal when the open circuit voltage is lower than a preset threshold value specifically includes:

[0080] Collect open circuit voltage data of battery packs, battery modules and battery module branches, and perform multiple sampling on each branch, at least 10 times;

[0081] The first open circuit voltage acquisition value of the i-th branch of the n-th module is recorded as , the mth open circuit voltage acquisition value of the ith branch of the nth module is recorded as Calculate the open circuit voltage value of the i-th branch of the n-th module Open circuit voltage of the nth module The open circuit voltage of the battery pack is V = V 1 +V 2 +...+V n ;

[0082] Calculate the average open circuit voltage of the battery pack, battery module and battery module branch, and compare it with the preset threshold value to generate an open circuit voltage alarm signal;

[0083] Set the qualified judgment value of the battery branch open circuit voltage to A1, the qualified judgment value of the battery module open circuit voltage to A2, and the qualified judgment value of the battery pack open circuit voltage to A3; when the branch open circuit voltage V i n Less than A1 or module open circuit voltage V n When the open circuit voltage V of the battery pack is less than A2 or the open circuit voltage V of the battery pack is less than A3, the open circuit voltage of the battery pack is determined to be unqualified and an open circuit voltage alarm signal is generated.

[0084] Specifically, this embodiment achieves accurate monitoring of the battery open circuit voltage and data stability analysis by sampling the open circuit voltage data of the battery pack, battery module and its branches multiple times (at least 10 times). Multiple sampling reduces the error that may be caused by single sampling, improves the accuracy and reliability of voltage data, and provides more accurate data support for battery health status judgment and abnormality detection, thereby improving the safety of battery management.

[0085] The collecting of load voltage data of the battery pack, the battery module and the battery module branch according to a preset period, and performing battery activation when the load voltage does not meet the preset requirements, specifically includes:

[0086] Collect the load voltage data of the battery pack, battery module and battery module branch, and perform multiple sampling on each branch, at least 10 times;

[0087] The first load voltage acquisition value of the i-th branch of the n-th module is recorded as The mth load voltage acquisition value of the ith branch of the nth module is recorded as Calculate the load voltage value of the i-th branch of the n-th module Load voltage of the nth module Load voltage of battery pack

[0088] Calculate the average load voltage of the battery pack, battery module and battery module branch, and compare it with the preset threshold value, and activate the battery when the load voltage is unqualified;

[0089] Set the battery branch load voltage qualified judgment value to B1, the battery module load voltage qualified judgment value to B2, and the battery pack load voltage qualified judgment value to B3; when the branch load voltage Less than B1 or module load voltage Less than B2 or battery load voltage When it is less than B3, the load voltage of the battery pack is determined to be unqualified, and data information is generated and displayed with "Load voltage unqualified, please try activation" to activate the battery.

[0090] Specifically, this embodiment samples the load voltage data of the battery pack, battery module and its branches multiple times (at least 10 times), calculates the average value of the load voltage at each level, and combines the multi-level judgment threshold (branch, module, battery pack) to conduct a comprehensive analysis of the load voltage, thereby achieving accurate monitoring and abnormal judgment of the battery pack operation status. Multiple sampling improves the accuracy and reliability of the data, and the multi-level judgment mechanism ensures the comprehensiveness and meticulousness of the monitoring, which can timely detect load voltage abnormalities and generate alarm information, while prompting the user to perform battery activation operations, thereby effectively ensuring the safety, stability and service life of the battery pack.

[0091] The collecting of temperature and humidity data of the battery pack and generating a temperature and humidity alarm signal when the temperature or humidity exceeds a preset threshold specifically includes:

[0092] Collect the temperature data of each module of the battery pack. The temperature sensor is installed at the center of the battery module to analyze and determine the collected temperature data;

[0093] The collected temperature value is recorded as According to the working environment characteristics of the battery pack, the natural environment temperature is set to T0, and the upper limit of the battery pack temperature is set to C1; or When the battery pack temperature is abnormal, it is determined that the battery pack temperature is abnormal, a temperature alarm signal is generated, and "battery pack temperature is abnormal" is displayed on the display device;

[0094] Collecting humidity data in the battery pack box, wherein the humidity sensor is installed in the battery pack box, and analyzing and determining the collected humidity data;

[0095] The collected humidity value is recorded as According to the working environment characteristics of the battery pack, the upper limit of the battery pack humidity is set to D1; when When the humidity in the battery pack is abnormal, it is determined that the humidity in the battery pack is abnormal, a humidity alarm signal is generated, and an alarm message of "battery pack humidity abnormality" is displayed on the display device.

[0096] Specifically, this embodiment collects the temperature data of each module of the battery pack and the humidity data in the box, and uses the temperature sensor installed at the center of the battery module and the humidity sensor in the box to analyze and determine the collected data, thereby realizing accurate monitoring of the temperature and humidity status of the battery pack, being able to promptly detect abnormal temperature or humidity of the battery pack, generate temperature and humidity alarm signals, and intuitively display abnormal information through a display device, while activating the alarm device to sound an alarm, thereby effectively preventing battery performance degradation or safety hazards caused by abnormal temperature and humidity, and improving the safety and reliability of battery pack operation.

[0097] The monitoring of the gas concentration of sulfur dioxide or hydrogen sulfide in the box of the battery pack, calculating the average value of the gas concentration, determining that the battery is leaking when the gas concentration exceeds a preset threshold, and generating a gas leakage alarm signal specifically includes:

[0098] Collect the sulfur dioxide or hydrogen sulfide gas concentration data in the battery pack box, and sample the gas concentration multiple times, at least 10 times;

[0099] The sulfur dioxide or hydrogen sulfide gas sensor is installed in the battery pack box. The first gas concentration collection value is recorded as PM1, the second gas concentration collection value is recorded as PM2, and the mth gas concentration collection value is recorded as PM m , the gas concentration collection value is detected by a chemical sensor or an infrared sensor, and the collected data is sent back to a data storage device for storage;

[0100] Calculate the average gas concentration in the battery pack box and compare it with the preset threshold to generate a gas leakage alarm signal;

[0101] Calculate the average gas concentration in the battery pack According to the chemical properties of the battery pack, the qualified judgment value of the sulfur dioxide or hydrogen sulfide gas concentration of the battery pack is set to E1. When the PM is not less than E1, the battery pack is judged to have leakage, and data information is generated and displayed on the display device. "Battery Pack Leakage" is also displayed. At the same time, the alarm device is activated to send out a gas leakage alarm signal.

[0102] Specifically, this embodiment activates the battery module by adopting a segmented activation method, and performs voltage detection, activation operation and recovery operation in sequence during the activation process until the voltage of the battery module reaches the preset requirement. Through the segmented activation method, the battery module can be accurately activated according to the specific state, avoiding the over-activation or under-activation problems that may be caused by the traditional activation method; at the same time, through the voltage detection and recovery operation before and after activation, the safety and effectiveness of the activation process are ensured, thereby effectively improving the performance of the battery module and extending the service life of the battery pack.

[0103] The segmented activation method is adopted to activate the battery module by selecting an activation branch. During the activation process, voltage detection, activation operation and recovery operation are performed in sequence until the voltage of the battery module reaches the preset requirement, which specifically includes:

[0104] The battery module branch is tested for an initial state. In the initial state, switches S1 to S n and switch S jh All are in disconnected state, and the open circuit voltage of each branch is detected in turn;

[0105] In the initial state, first close switch S1 to detect the open circuit voltage of branch 1 and then open the switch, and then switch S2 to S n Perform the same operation to detect the open circuit voltages of branches 2 to n, and complete the initial state detection of all branches; the open circuit voltage detection data is used to determine whether an activation operation is required;

[0106] Execute battery activation operation by controlling switches S1 to S n and switch S jh The on-off state of each branch is activated, the voltage is detected and the recovery operation is performed in sequence, and the activation operation is repeated y times, where y≥2;

[0107] Close switches S1 and S jh , activate branch 1, detect the activation voltage and activation current of branch 1, and disconnect S after activation is completed jh Restore and close S after recovery is completed. jh Detect the recovery voltage of branch 1 and then disconnect S jh and S1; then S2~S n and S jh Perform the same operation to activate branch 2 to branch n, and detect the branch activation voltage, activation current and recovery voltage; repeat the above activation process until the voltage of the battery module reaches the preset requirement.

[0108] Specifically, this embodiment collects parameter data such as voltage, temperature, humidity and gas concentration of the battery pack at preset time intervals, and stores, analyzes and displays the data, thereby achieving real-time monitoring and comprehensive evaluation of the operating status of the battery pack. By adjusting the system operating frequency to optimize power consumption, the system operating efficiency is improved; through abnormal detection and sound and light alarm functions, users are promptly notified of potential problems, ensuring the safety and reliability of the battery pack; at the same time, the analysis results are intuitively presented through the LCD display module, which makes it easier for users to understand the battery health status and abnormal information, improving practicality and management efficiency.

[0109] The parameter data of the battery pack is collected at a preset time interval, the parameter data includes voltage, temperature, humidity and gas concentration data, the parameter data is stored and analyzed, and the analysis results are output to a display device and an alarm device, specifically including:

[0110] With the initial preset time as the time base point 0, the monitoring is started at the preset time interval tn to collect the voltage, temperature, humidity and gas concentration data of the battery pack;

[0111] The parameter data include battery pack open circuit voltage, battery module open circuit voltage, battery module branch open circuit voltage, battery pack load voltage, battery module load voltage, battery module branch load voltage, battery pack temperature, battery pack humidity, and sulfur dioxide or hydrogen sulfide gas concentration in the battery pack box; the main control module collects monitoring data and transmits it back to the data storage device for storage;

[0112] Store and analyze the collected parameter data, adjust the system operating frequency, optimize the system power consumption level, and send the analysis results to the display module and alarm module;

[0113] The integrated control module analyzes the stored parameter data, generates analysis results including the corresponding number of the battery module, historical activation time, battery module open circuit voltage, battery module operating voltage, battery module temperature, gas concentration in the battery module, humidity, remaining battery power, and battery health status (qualified / unqualified), and displays the analysis results through the LCD display module; when an abnormality is detected, the buzzer and alarm indicator light in the alarm module are activated to sound an alarm.

[0114] Specifically, this embodiment monitors the voltage, temperature, humidity, gas concentration and other parameters of the battery pack in real time, accurately determines abnormal situations, generates abnormal data information, intuitively displays abnormal information through the LCD display module, and simultaneously activates the sound and light alarm device to promptly remind the user, thereby achieving comprehensive monitoring of the operating status of the battery pack, being able to quickly and accurately detect abnormal situations, and ensuring the safety and reliability of the battery pack; and improving the user's management efficiency through intuitive abnormal information display and efficient sound and light alarms.

[0115] When an abnormality is detected during the monitoring process, abnormal data information is generated, the abnormal data information is sent to a display device for display, and an alarm device is activated to send an abnormal alarm signal, specifically including:

[0116] Monitor the working status of the battery pack in real time, determine whether there are abnormal conditions such as abnormal voltage, abnormal temperature, abnormal humidity or abnormal gas concentration, and generate abnormal data information;

[0117] The abnormal conditions include: the battery pack open circuit voltage < A3 or the battery module open circuit voltage < A2 or the battery branch open circuit voltage < A1; the battery pack load voltage < B3 or the battery module load voltage < B2 or the battery branch load voltage < B1; the battery pack temperature or When; battery pack humidity ≥ D1; sulfur dioxide or hydrogen sulfide gas concentration in the battery pack box ≥ E1;

[0118] The abnormal data information is sent to the display device and the alarm device, the abnormal information is displayed through the LCD display module, and the sound and light alarm device is activated to send an alarm signal;

[0119] The abnormal information displayed on the LCD display module includes the corresponding number of the battery module, the abnormal type, the abnormal parameter value, the battery health status and the like; the alarm device includes an acoustic alarm component and a light alarm component, wherein the acoustic alarm component adopts an active buzzer with a sound level of up to 85dB, and the light alarm component adopts an LED indicator light, which can be clearly identified at a distance of up to 20m.

[0120] Specifically, this embodiment realizes accurate identification and timely alarm of abnormal state of battery pack by real-time monitoring of multiple parameters such as open circuit voltage, load voltage, temperature, humidity and gas concentration of battery pack, and setting clear multi-level abnormal judgment threshold. The accuracy of abnormal detection is improved through comprehensive parameter monitoring and accurate threshold judgment; the sound and light alarm device (85dB buzzer and 20m visible LED indicator) ensures that abnormal situation can be discovered in time; at the same time, the LCD display module displays the abnormal information in detail (including module number, abnormal type, parameter value, etc.), which is convenient for users to quickly locate and deal with problems, thereby comprehensively improving the safety of battery pack.

[0121] See also Figure 2-4 The present invention also provides a lithium primary battery health management system, the system comprising:

[0122] A mechanical assembly, wherein the mechanical assembly comprises an outer box 1, an inner box 2 and an inner box connecting cable 4, wherein the outer box 1 is composed of an outer box body, a display screen, a page up button, a page down button, a liquid crystal power supply, a driving board, an activation indicator light, an undervoltage indicator light, a buzzer, a preset interface and a rear cover plate, and the inner box 2 is composed of an inner box body, an inner box cover plate group, a detection resistor and a connection socket;

[0123] The integrated control module 6 includes a main control module, a detection preset module, a storage module, a clock module and an AD acquisition module, and is used to control the system's periodic power-on and power-off, clock cycle control, data storage and parameter preset;

[0124] An alarm module 9, wherein the alarm module 9 comprises an acoustic alarm component and a light alarm component, wherein the acoustic alarm component adopts an active buzzer, and the light alarm component adopts an LED indicator light;

[0125] LCD display module 10, used to display system data and information;

[0126] A switch assembly 11, wherein the switch assembly includes a power switch assembly and an LCD switch assembly;

[0127] A detection cable assembly 5, used to connect the battery management system and the managed battery pack;

[0128] The leakage gas sensor assembly 7 is used to monitor the concentration of sulfur dioxide or hydrogen sulfide gas in the battery pack box;

[0129] The temperature and humidity sensor assembly 8 is used to monitor the temperature and humidity of the battery pack.

[0130] The outer box 1 of the lithium primary battery health management system is installed outside the battery pack packaging box, and the inner box 2 is installed at the end of the battery pack in the packaging box. The outer box 1 and the inner box 2 are connected by the outer box connecting cable and the inner box connecting cable, and the two sets of cables are connected by the sealing component 3.

[0131] The outer box 1 is an integral structure, mainly composed of an outer box body, a battery pack, a display screen, a page up button, a page down button, an LCD power supply, a monitoring power supply, a driver board, an activation indicator light, an undervoltage indicator light, a buzzer, a preset interface, a rear cover, etc.

[0132] The outer box 1 is fixed to the packaging box with screws, which can be easily disassembled and replaced; the safety cover is made of transparent glass material, which is convenient for viewing the indicator light and display screen, and the outside is flush with the packaging box panel. The LCD display screen can be activated by the page turning button to display the battery activation content of the previous page and the next page.

[0133] The outer box driver board mainly connects the driving signals of panel indicator lights, switches, buzzers, LCDs, battery packs, etc., and transfers the signals to the inner box control board.

[0134] The rear panel of the outer box is made of non-metallic material with a hole in the middle to facilitate the connection of the outer box connection cable.

[0135] The main installation process of the outer box 1 is as follows: fix the panel indicator light, switch, buzzer, and LCD behind the panel and connect them to the driver board respectively. After fixing the driver board on the bracket, cover the outer box rear cover and tighten it with screws. Connect the outer box connection cable to the driver board through the opening of the outer box rear cover, pass the inner box connection cable through the hole of the packaging box, fix the sealing component 3 on the hole of the packaging box, and fix the outer box as a whole on the packaging box.

[0136] The inner box 2 is installed at the end of the battery pack support frame, and is mainly composed of an inner box body, an inner box cover plate group, an activation resistor, etc. Figure 4 The inner box cover assembly is composed of a cover, a battery connection socket, an inner box connection socket, an integrated control panel, a control panel support column, etc.

[0137] The inner box body is made of aluminum alloy, the panel is arranged with battery connection connectors, and each is marked with a film. There is also an inner box connection socket for connecting the outer box information connection cable to perform data transmission and power control on the outer box 1.

[0138] Discharge resistors are installed around the inner box 2, and thermal conductive paste is applied between the resistors and the box body to increase the heat dissipation area and heat dissipation effect of the discharge resistors and reduce heat accumulation.

[0139] The integrated control board is distributed with P groups (P=1, 2, 3, ... n+1) of battery connectors, of which n groups of connectors are connected to the activation cable and the battery pack, and 1 group of connectors is connected to the external box drive board, which is mainly used to connect the external box power supply, indicator light, switch, and battery pack activation positive and negative poles to the integrated control board. On the other side of the integrated control board, the activation resistor is connected to the activation resistor connection socket, and the bottom cover of the inner box is covered.

[0140] The sealing component 3 mainly connects the outer box and the inner box for signal and power connection, and ensures the airtightness of the packaging box. It adopts a flange surface sealing structure with a threaded structure in the hole for vulcanization to increase friction. Several signal wiring holes are processed to isolate and insulate each other. The process method of fixing glue and vulcanized glue is adopted to solve the airtightness performance.

[0141] Implementation method of multi-module branch activation detection: Activation detection realizes the load resistance required for discharging of the activation battery. According to the heat dissipation of the device, n groups of load resistances are used to complete x in time division. n The battery is activated.

[0142] In order to ensure that the battery management system occupies as little space as possible, is suitable for installation in different application environments, and optimizes the number of load resistors, it is necessary to use switches to select different battery packs in time and complete activation in sequence. n Used to select the series branch to be activated, S jh Used to control the activation state and recovery (open circuit) state of the branch. All switches are controlled by the control module. The voltage sampling point is used to collect the open circuit voltage, activation voltage and recovery voltage of the activated branch; the current sampling point is used to collect the activation current.

[0143] In the initial state, switches S1 to S n and switch S jh All are in the disconnected state. The control module can detect the open circuit voltage of each branch. Close switch S1, detect the open circuit voltage of branch 1, and then disconnect the switch, and then turn on S2~Sn Perform the same operation to detect the open circuit voltage of branch 2 to branch n.

[0144] When the battery is activated, close switches S1 and S jh , activate branch 1, detect the activation voltage and activation current of branch 1, and disconnect S after activation is completed jh After the recovery is completed, close S jh , detect the recovery voltage of branch 1, and then disconnect S jh and S1. Then, S2~S n and S jh The same operation is performed to activate branches 2 to n, and the branch activation voltage, activation current and recovery voltage are detected.

[0145] During the storage of the battery pack, first turn on the power button switch of the battery management system, set the parameters by the PC or use the default parameters, and the system will work periodically after the parameters are set.

[0146] The battery activation work is carried out according to the set cycle, and the battery activation status, battery voltage, cabin temperature, and cabin gas are detected at the same time. If abnormal conditions such as activation failure, battery voltage not meeting requirements, temperature abnormality, and gas monitoring abnormality occur, sound and light alarms are output, and the RS422 port outputs alarm information data; it is in a low power consumption state during non-working periods; during the activation detection cycle, the main control module controls the simultaneous detection of voltage information of multiple parallel battery packs in 1 to n battery packs in a certain order, and controls the battery discharge in turn, activates the battery, and stores the data information at the same time. After completing the activation of the entire battery group, the information is sent to the LCD display module for display, and the power system main control module marks the time information for storage.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium primary battery health management method, characterized in that: The following steps are involved: Connect the health management system to the managed lithium primary battery pack through the detection cable assembly, connect the positive and negative terminals of the battery module, and set the working parameters; Collecting open circuit voltage data of the battery pack, battery module and battery module branch according to a preset period, storing the open circuit voltage data, and generating an open circuit voltage alarm signal when the open circuit voltage is lower than a preset threshold; Collect load voltage data of battery packs, battery modules and battery module branches according to preset cycles, and activate the battery when the load voltage does not meet the preset requirements; Collect temperature and humidity data of the battery pack and generate temperature and humidity alarm signals when the temperature or humidity exceeds the preset threshold; Monitor the gas concentration of sulfur dioxide or hydrogen sulfide in the battery pack box, determine battery leakage when the gas concentration exceeds a preset threshold, and generate a gas leakage alarm signal; The segmented activation method is adopted to activate the battery module by selecting the activation branch. During the activation process, voltage detection, activation operation and recovery operation are performed in sequence until the voltage of the battery module reaches the preset requirement; Collect parameter data of the battery pack at preset time intervals, the parameter data including voltage, temperature, humidity and gas concentration data, store and analyze the parameter data, and output the analysis results to a display device and an alarm device; When an abnormality is detected during the monitoring process, abnormal data information is generated, the abnormal data information is sent to a display device for display, and an alarm device is activated to send an abnormal alarm signal.

2. A lithium primary battery health management method as claimed in claim 1, characterized in that: The health management system is connected to the managed lithium primary battery pack through the detection cable assembly, the positive and negative terminals of the battery module are connected, and the working parameters are set, specifically including: Connecting the health management system to the managed lithium primary battery pack through a detection cable assembly, wherein the detection cable assembly includes an activation detection cable, an inner box connection cable, a detection preset cable, and an activation resistor connection cable; The operating parameters include a battery open circuit voltage determination value, a battery operating voltage determination value, a battery temperature determination value, a leakage gas concentration threshold, a detection cycle, a humidity determination value, an open circuit voltage offset, and an operating voltage offset.

3. A lithium primary battery health management method as claimed in claim 2, characterized in that: The collecting of open circuit voltage data of the battery pack, the battery module and the battery module branch according to a preset period, storing the open circuit voltage data, and generating an open circuit voltage alarm signal when the open circuit voltage is lower than a preset threshold value specifically includes: Collect the open circuit voltage data of the battery pack, battery module and battery module branch, perform multiple sampling on each branch, and record the first open circuit voltage collection value of the ith branch of the nth module as The mth open circuit voltage acquisition value of the ith branch of the nth module is recorded as Calculate the open circuit voltage value of the i-th branch of the n-th module Open circuit voltage of the nth module The open circuit voltage of the battery pack is V = V 1 +V 2 +...+V n .

4. A lithium primary battery health management method as claimed in claim 3, characterized in that: The collecting of load voltage data of the battery pack, the battery module and the battery module branch according to a preset period, and performing battery activation when the load voltage does not meet the preset requirements, specifically includes: Collect the load voltage data of the battery pack, battery module and battery module branch, perform multiple sampling on each branch, and record the first load voltage collection value of the i-th branch of the n-th module as The mth load voltage acquisition value of the ith branch of the nth module is recorded as Calculate the load voltage value of the i-th branch of the n-th module Load voltage of the nth module Load voltage of battery pack The average load voltage of the battery pack, battery module and battery module branch is calculated and compared with the preset threshold value, and the battery is activated when the load voltage is unqualified.

5. A lithium primary battery health management method as claimed in claim 1, characterized in that: The collecting of temperature and humidity data of the battery pack and generating a temperature and humidity alarm signal when the temperature or humidity exceeds a preset threshold specifically includes: Collect the temperature data of each module of the battery pack. The temperature sensor is installed at the center of the battery module to analyze and determine the collected temperature data; The collected temperature value is recorded as a={1,2,...,a}, according to the working environment characteristics of the battery pack, the natural environment temperature is set to T0, and the upper limit of the battery pack temperature is set to C1; when or When the battery pack temperature is abnormal, a temperature alarm signal is generated, and an alarm message is displayed on a display device; Collecting humidity data in the battery pack box, wherein the humidity sensor is installed in the battery pack box, and analyzing and determining the collected humidity data; The collected humidity value is recorded as According to the working environment characteristics of the battery pack, the upper limit of the battery pack humidity is set to D1; when When the humidity in the battery pack is abnormal, a humidity alarm signal is generated and an alarm message is displayed on the display device.

6. A lithium primary battery health management method as claimed in claim 1, characterized in that: The monitoring of the gas concentration of sulfur dioxide or hydrogen sulfide in the battery pack box, determining that the battery is leaking when the gas concentration exceeds a preset threshold, and generating a gas leakage alarm signal specifically includes: Collect sulfur dioxide or hydrogen sulfide gas concentration data in the battery pack box, sample the gas concentration multiple times, the sulfur dioxide or hydrogen sulfide gas sensor is installed in the battery pack box, the first gas concentration collection value is recorded as PM1, the second gas concentration collection value is recorded as PM2, and the mth gas concentration collection value is recorded as PM m , the gas concentration collection value is detected by a chemical sensor or an infrared sensor, and the collected data is sent back to a data storage device for storage; Calculate the average gas concentration in the battery pack box and compare it with the preset threshold to generate a gas leakage alarm signal; Calculate the average gas concentration in the battery pack, and set the qualified judgment value of sulfur dioxide or hydrogen sulfide gas concentration in the battery pack to E1 according to the chemical properties of the battery pack. When the average gas concentration is not less than E1, the battery pack is judged to have leakage, and the alarm device is activated to send out a gas leakage alarm signal.

7. A lithium primary battery health management method as claimed in claim 1, characterized in that: The segmented activation method is adopted to activate the battery module by selecting an activation branch. During the activation process, voltage detection, activation operation and recovery operation are performed in sequence until the voltage of the battery module reaches the preset requirement, which specifically includes: The battery module branch is tested for an initial state. In the initial state, switches S1 to S n and switch S jh All are in disconnected state, and the open circuit voltage of each branch is detected in turn; In the initial state, first close switch S1 to detect the open circuit voltage of branch 1 and then open the switch, and then switch S2 to S n Perform the same operation to detect the open circuit voltages of branches 2 to n, and complete the initial state detection of all branches; the open circuit voltage detection data is used to determine whether an activation operation is required; Execute battery activation operation by controlling switches S1 to S n and switch S jh The on-off state of each branch is activated, the voltage is detected and the recovery operation is performed in sequence, and the activation operation is repeated multiple times; Close switches S1 and S jh , activate branch 1, detect the activation voltage and activation current of branch 1, and disconnect S after activation is completed jh Restore and close S after recovery is completed. jh Detect the recovery voltage of branch 1 and then disconnect S jh and S1; then S2~S n and S jh Perform the same operation to activate branch 2 to branch n, and detect the branch activation voltage, activation current and recovery voltage; repeat the activation process until the voltage of the battery module reaches the preset requirement.

8. A lithium primary battery health management method as claimed in claim 1, characterized in that: The parameter data of the battery pack is collected at a preset time interval, the parameter data includes voltage, temperature, humidity and gas concentration data, the parameter data is stored and analyzed, and the analysis results are output to a display device and an alarm device, specifically including: With the initial preset time as the time base point 0, monitoring is started at the preset time interval to collect the voltage, temperature, humidity and gas concentration data of the battery pack; The parameter data include battery pack open circuit voltage, battery module open circuit voltage, battery module branch open circuit voltage, battery pack load voltage, battery module load voltage, battery module branch load voltage, battery pack temperature, battery pack humidity, and sulfur dioxide or hydrogen sulfide gas concentration in the battery pack box; The collected parameter data is stored and analyzed, the system operating frequency is adjusted, and the analysis results are sent to the display module and the alarm module.

9. A lithium primary battery health management method as claimed in claim 1, characterized in that: When an abnormality is detected during the monitoring process, abnormal data information is generated, the abnormal data information is sent to a display device for display, and an alarm device is activated to send an abnormal alarm signal, specifically including: Monitor the working status of the battery pack in real time, determine whether there are abnormal voltage, temperature, humidity or gas concentration, and generate abnormal data information; The abnormal data information is sent to the display device and the alarm device, the abnormal information is displayed through the LCD display module, and the sound and light alarm device is activated to send an alarm signal; The abnormal information displayed by the LCD display module includes the corresponding number of the battery module, the abnormal type, the abnormal parameter value, and the battery health status; the alarm device includes an acoustic alarm component and a light alarm component, the acoustic alarm component includes a source buzzer, and the light alarm component includes an LED indicator light.

10. A lithium primary battery health management system, used to implement a lithium primary battery health management method as claimed in any one of claims 1 to 9, characterized in that: The system comprises: A mechanical assembly, wherein the mechanical assembly comprises an outer box, an inner box and a connecting cable, wherein the outer box is composed of an outer box body, a display screen, a page up button, a page down button, a liquid crystal power supply, a drive board, an activation indicator light, an undervoltage indicator light, a buzzer, a preset interface and a rear cover plate, and the inner box is composed of an inner box body, an inner box cover plate assembly, a detection resistor and a connecting socket; An integrated control module, which includes a main control module, a detection preset module, a storage module, a clock module and an AD acquisition module, and is used to control the system's periodic power-on and power-off, clock cycle control, data storage and parameter preset; An alarm module, the alarm module comprising an acoustic alarm component and a light alarm component, the acoustic alarm component adopts an active buzzer, and the light alarm component adopts an LED indicator light; LCD display module, used to display system data and information; A switch assembly, wherein the switch assembly comprises a power switch assembly and an LCD switch assembly; Detection cable assembly, used to connect the battery management system and the managed battery pack; Leakage gas sensor assembly, used to monitor the concentration of sulfur dioxide or hydrogen sulfide gas in the battery pack box; Temperature and humidity sensor assembly, used to monitor the temperature and humidity of the battery pack.

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