Railway communication dynamic environment monitoring system lead-acid battery internal resistance monitoring device

Abstract

The utility model relates to railway communication power supply safety technical field, specifically disclose railway communication dynamic environment monitoring system is with lead -acid battery internal resistance monitoring device, include: battery internal resistance monitoring main module, battery internal resistance monitoring submodule, hall sensor, temperature sensor and wiring, the main module is equipped with uplink RS485 interface, downlink interface, total voltage interface and total current interface, uplink RS485 interface connects dynamic environment monitoring system FSU, downlink interface connects at least one submodule through daisy chain topology, most can cascade ten submodules, total voltage interface connects the positive and negative pole of storage battery group total voltage, the utility model discloses through the uplink RS485 interface of main module and the daisy chain topology structure setting of submodule, realized the centralized collection and modularization extension of storage battery group data, make the system can flexible adaptation different scale's battery group monitoring demand, ensure the stability and real -time of data transmission simultaneously, thereby reached the effect that promoted monitoring system compatibility and expansibility.

Description

Technical Field

[0001] This utility model belongs to the field of railway communication power supply safety technology, specifically relating to a lead-acid battery internal resistance monitoring device for railway communication dynamic environment monitoring system. Background Technology

[0002] In the field of railway communication power supply safety technology, lead-acid batteries are an important component of backup power systems. Their stability and reliability are directly related to the normal operation of communication equipment and the safety of railway communication. With the continuous development of railway communication technology, higher requirements have been put forward for the monitoring and management of backup power systems. Traditional lead-acid battery monitoring methods mostly rely on manual inspection and regular maintenance. This method is not only inefficient, but also makes it difficult to grasp the operating status of battery banks in real time and accurately. Especially when facing large-scale battery banks, the complexity and cost of monitoring increase significantly.

[0003] The maintenance of railway communication power supplies currently faces many challenges. On the one hand, battery capacity is difficult to predict, and power supply safety is uncontrollable, posing serious safety hazards. Battery maintenance parameters cannot be precisely controlled, which can easily lead to battery thermal runaway, resulting in shortened battery life and premature capacity loss, seriously affecting the safety of communication power supply. On the other hand, the maintenance of batteries in railway communication is still mainly manual, covering three aspects: daily maintenance, centralized maintenance, and key repairs. Daily maintenance mainly measures the float charge voltage, float charge current, and battery temperature of the battery pack. Although these data can be extracted from the environmental monitoring system, they can only reflect part of the basic status. The core item of centralized maintenance is the verification discharge test. This test requires the battery to be discharged under actual load, discharging 30%-40% of the battery's rated capacity, and then the actual remaining capacity of the battery is estimated through mathematical formulas. It is stipulated that the actual remaining capacity of the battery should not be less than 80% of the rated capacity to be qualified. This means that the true capacity of the battery depends on the data from the annual verification discharge test or capacity test. However, the battery verification discharge test and capacity test are not only time-consuming but also accompanied by high safety risks, so staff need to improve them. Utility Model Content

[0004] The purpose of this invention is to provide a lead-acid battery internal resistance monitoring device for railway communication dynamic environment monitoring system, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A lead-acid battery internal resistance monitoring device for railway communication environmental monitoring system includes:

[0007] Battery internal resistance monitoring main module, battery internal resistance monitoring sub-module, Hall sensor, temperature sensor and wiring;

[0008] The main module is equipped with an upstream RS485 interface, a downstream interface, a total voltage interface, and a total current interface;

[0009] The uplink RS485 interface is connected to the environmental monitoring system (FSU).

[0010] The downlink interface connects at least one sub-module via a daisy-chain topology, and can cascade up to ten sub-modules.

[0011] The total voltage interface is connected to the positive and negative terminals of the total voltage of the battery pack, and the total current interface is connected to a Hall sensor to monitor the total current of the battery pack.

[0012] The sub-module is equipped with an uplink interface, a downlink interface, V1-V4 interfaces, an I+ interface, an I- interface, and a T1 interface;

[0013] The V1-V4 interfaces are respectively connected to the terminal voltage detection signals of batteries 1 to 4 in the group;

[0014] The I+ interface is connected to the positive terminal of battery #1, and the I- interface is connected to the negative terminal of battery #4 in series to monitor the current.

[0015] The T1 interface is connected to a temperature sensor, which is fixed to the positive terminal of battery #1 via a metal heat-conducting sheet.

[0016] Preferably, the temperature sensor is an acid-resistant encapsulated PT100 platinum resistance thermometer, and its signal line uses a fluoroplastic shielded cable.

[0017] Preferably, the sub-module has an independent housing, on which a pluggable uplink interface and a downlink interface are provided for connection to one of the main module and the adjacent sub-module.

[0018] Preferably, the downlink interface of the sub-module is connected to the uplink interface of the next sub-module via a shielded cable with a length of ≤1.5 meters.

[0019] Preferably, the temperature sensor is in close contact with the positive electrode post via a stainless steel clamp and thermal grease.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] (1) By setting up the uplink RS485 interface of the main module and the daisy-chain topology of the sub-module, the centralized acquisition and modular expansion of battery pack data are realized, enabling the system to flexibly adapt to the monitoring needs of battery packs of different sizes, while ensuring the stability and real-time performance of data transmission, thereby improving the compatibility and scalability of the monitoring system.

[0022] (2) By setting up Hall sensors, temperature sensors and V1-V4 voltage detection interfaces, the total current, temperature data and single cell voltage of the battery pack are collected in a comprehensive manner. Combined with the internal resistance calculation algorithm, the battery health status is analyzed in real time, thereby achieving the effect of accurately monitoring battery performance and timely detection of potential faults.

[0023] (3) By using acid-resistant encapsulated PT100 platinum resistance thermometer and stainless steel clamps, the temperature sensor can still work stably in harsh environments. The temperature measurement accuracy is enhanced by using thermal grease, thereby improving the reliability of temperature monitoring and avoiding data distortion caused by environmental corrosion or poor contact.

[0024] (4) By setting up the data upload and remote alarm function of the environmental monitoring system FSU, the monitoring data is transmitted to the operation and maintenance platform in real time, and the alarm is automatically triggered in conjunction with the early warning mechanism, so that the operation and maintenance personnel can respond quickly to abnormal situations, thereby improving the operation and maintenance efficiency and reducing the cost of manual inspection.

[0025] (5) By tightly connecting the temperature sensor to the positive terminal of the battery, the temperature measurement point is directly fixed in the positive terminal area, which is most sensitive to temperature changes inside the battery. Compared with the traditional surface mount method, it can more accurately reflect the core temperature change of the battery. At the same time, combined with acid-resistant encapsulation and thermal grease to strengthen the contact, it can achieve the effect of early and accurate warning of thermal runaway risk and improve the reliability of battery safety monitoring. Attached Figure Description

[0026] Figure 1 This is a connection diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the main module functional interface of this utility model;

[0028] Figure 3 This is a schematic diagram of the modular functional interfaces of this utility model;

[0029] Figure 4 This is a flowchart of the battery thermal runaway early warning system of this utility model. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1:

[0032] Please see Figures 1 to 4 As shown, the internal resistance monitoring device for lead-acid batteries used in the railway communication dynamic environment monitoring system includes: a main module for monitoring battery internal resistance, a sub-module for monitoring battery internal resistance, a Hall sensor, a temperature sensor, and wiring.

[0033] Main module configuration: The main module is equipped with an upstream RS485 interface, a downstream interface, a total voltage interface, and a total current interface.

[0034] The uplink RS485 interface connects to the environmental monitoring system FSU to upload data to the monitoring center.

[0035] The downlink interface connects sub-modules via a daisy chain topology, allowing up to ten sub-modules to be cascaded, providing strong scalability.

[0036] The total voltage interface connects to the positive and negative terminals of the battery pack's total voltage to monitor the total voltage in real time.

[0037] The total current interface connects to a Hall sensor to monitor the total current of the battery pack.

[0038] Modular configuration: Each module has an uplink interface, a downlink interface, V1-V4 interfaces, an I+ interface, an I- interface, and a T1 interface.

[0039] The V1-V4 interfaces are connected to the terminal voltage detection signals of batteries #1 to #4 in the group, respectively, to realize single battery voltage monitoring.

[0040] Connect the I+ interface to the positive terminal of battery #1 and the I- interface to the negative terminal of battery #4, and monitor the current in series.

[0041] The T1 interface connects to a temperature sensor, which is fixed to the positive terminal of battery #1 via a metal heat-conducting plate to monitor the battery temperature in real time.

[0042] Temperature sensor details: The temperature sensor uses an acid-resistant encapsulated PT100 platinum resistance thermometer to ensure long-term stable operation in acidic environments.

[0043] The signal cable uses fluoroplastic shielded cable, which has strong anti-interference ability.

[0044] The temperature sensor is in close contact with the positive terminal of the battery through a stainless steel clamp and thermal grease, which improves the accuracy of temperature measurement.

[0045] Modular connection method: Each module has an independent housing with pluggable uplink and downlink interfaces, which facilitates quick installation and maintenance.

[0046] The modules are connected by shielded cables with a length of ≤1.5 meters to reduce signal attenuation and interference.

[0047] System functions:

[0048] Real-time monitoring of the battery pack's total voltage, total current, individual cell voltage, individual cell internal resistance, and temperature provides a comprehensive understanding of the battery's status.

[0049] Modular expansion is achieved through a daisy-chain topology, adapting to the monitoring needs of battery packs of different sizes.

[0050] Internal resistance calculation model:

[0051]

[0052] Where K temp This is the temperature compensation coefficient (based on real-time correction of the positive electrode temperature);

[0053] Dynamic and environmental system linkage: The main module uploads data to the FSU via the Modbus-RTU protocol; the FSU interface adds "internal resistance trend" and "thermal runaway warning" status icons.

[0054] Data is uploaded to the environmental monitoring system (FSU) via an RS485 interface, supporting remote monitoring and early warning functions.

[0055] Example 2:

[0056] In railway communication systems, lead-acid battery packs serve as backup power sources, providing uninterrupted power to communication equipment. However, over long-term use, batteries may experience problems such as increased internal resistance, capacity decay, and abnormal temperature. If these issues are not detected in time, they can lead to power outages, affecting railway communication safety.

[0057] A railway bureau's communication section deployed lead-acid battery banks at multiple base stations along the line. However, due to the lack of real-time monitoring methods, communication was interrupted multiple times due to battery failures. To solve this problem, the communication section introduced a lead-acid battery internal resistance monitoring device for the railway communication dynamic environment monitoring system to achieve real-time monitoring, fault early warning, and remote management of the battery banks.

[0058] Equipment installation: The main module is installed in the base station environmental monitoring cabinet and is connected to the environmental monitoring system FSU (Front-end Acquisition Unit) via an uplink RS485 interface to achieve data upload.

[0059] The Hall sensor is installed in the main current loop of the battery pack to monitor the charging and discharging current.

[0060] The sub-modules are cascaded in a daisy-chain topology, with each sub-module monitoring 4 batteries (1# to 4#), and a total of 6 sub-modules are deployed, covering 24 batteries.

[0061] The temperature sensor (PT100 platinum resistance thermometer) is fixed to the positive terminal of battery #1 using a stainless steel clamp and thermal grease to ensure accurate temperature measurement.

[0062] Wiring method: The main voltage interface is connected to the main positive and main negative terminals of the battery pack to monitor the overall voltage.

[0063] The V1-V4 interfaces of the sub-module are respectively connected to the terminal voltage detection points of batteries #1 to #4.

[0064] The I+ interface is connected to the positive terminal of battery #1, and the I- interface is connected to the negative terminal of battery #4, forming a current monitoring loop.

[0065] The modules are connected by shielded cables of ≤1.5 meters to reduce signal interference.

[0066] Data collection and monitoring:

[0067] Real-time data acquisition:

[0068] The main module collects total voltage and total current data every 5 seconds.

[0069] Each module collects single-cell voltage and temperature data every 10 seconds.

[0070] All data is uploaded to the FSU via the RS485 interface and then transmitted to the monitoring center server.

[0071] Internal resistance calculation and health assessment: The system calculates the internal resistance value of each battery based on voltage and current fluctuations, and assesses the battery health status in conjunction with temperature data.

[0072] If the internal resistance of a battery cell exceeds a threshold (e.g., increases by 25% from the initial value), the system automatically marks it as "aging risk".

[0073] Fault warning and handling:

[0074] Temperature Anomaly Warning: During a routine inspection, the system detected that the temperature of battery #1 suddenly rose to 45℃ (normal range 20℃~35℃), immediately triggering a high temperature alarm.

[0075] Maintenance personnel remotely reviewed the data and confirmed that the battery was at risk of overcharging or internal short circuit, and then arranged for on-site inspection.

[0076] Testing revealed that the battery terminals were loose, causing increased contact resistance. After tightening, the temperature returned to normal.

[0077] Voltage imbalance alarm: When the voltage difference between batteries in the same group under float charging state continuously exceeds 90mV (2V series), the system will trigger a voltage imbalance alarm.

[0078] For example, if a group of 2V batteries is in float charging mode, and the voltage of battery #3 remains stable at 2.15V for a long time, while the voltage of other batteries is 2.23V (the difference is 80mV, which is close to the threshold but not exceeding the standard), the system will record the deviation and continuously track it. If the difference further expands to 95mV, it will be judged as abnormal and an early warning will be issued, prompting maintenance personnel to check whether there is a risk of loose connection or deterioration of individual batteries.

[0079] After the maintenance personnel replaced the battery, the system automatically recalibrated, and the battery pack returned to a balanced state.

[0080] Internal resistance degradation trend analysis: The system has been recording the internal resistance data of each battery for a long time. It was found that the internal resistance of a certain group of batteries has been increasing year by year, and its remaining life is predicted to be less than 1 year.

[0081] Based on data analysis, the railway bureau develops battery replacement plans in advance to avoid unexpected malfunctions.

[0082] Remote management and maintenance: Operation and maintenance personnel can view the battery status of each base station in real time through the environmental monitoring platform and receive SMS / email alarms.

[0083] The system supports historical data queries, which facilitates the analysis of battery performance trends.

[0084] By combining AI algorithms, predictive maintenance strategies can be further optimized in the future, reducing operation and maintenance costs.

[0085] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lead-acid battery internal resistance monitoring device for a railway communication dynamic environment monitoring system, characterized in that, include: Battery internal resistance monitoring main module, battery internal resistance monitoring sub-module, Hall sensor, temperature sensor and wiring; The main module is equipped with an upstream RS485 interface, a downstream interface, a total voltage interface, and a total current interface; The uplink RS485 interface is connected to the environmental monitoring system (FSU). The downlink interface connects at least one sub-module via a daisy-chain topology, and can cascade up to ten sub-modules. The total voltage interface is connected to the positive and negative terminals of the total voltage of the battery pack, and the total current interface is connected to a Hall sensor to monitor the total current of the battery pack. The sub-module is equipped with an uplink interface, a downlink interface, V1-V4 interfaces, an I+ interface, an I- interface, and a T1 interface; The V1-V4 interfaces are respectively connected to the terminal voltage detection signals of batteries 1 to 4 in the group; The I+ interface is connected to the positive terminal of battery #1, and the I- interface is connected to the negative terminal of battery #4 in series to monitor the current. The T1 interface is connected to a temperature sensor, which is fixed to the positive terminal of battery #1 via a metal heat-conducting sheet.

2. The internal resistance monitoring device for lead-acid batteries in a railway communication dynamic environment monitoring system according to claim 1, characterized in that: The temperature sensor is an acid-resistant encapsulated PT100 platinum resistance thermometer, and its signal line uses a fluoroplastic shielded cable.

3. The internal resistance monitoring device for lead-acid batteries in a railway communication dynamic environment monitoring system according to claim 1, characterized in that: The sub-module has an independent housing, on which are provided pluggable uplink and downlink interfaces for connection to either the main module or an adjacent sub-module.

4. The internal resistance monitoring device for lead-acid batteries in a railway communication dynamic environment monitoring system according to claim 1, characterized in that: The downlink interface of the sub-module is connected to the uplink interface of the next sub-module via a shielded cable with a length of ≤1.5 meters.

5. The internal resistance monitoring device for lead-acid batteries in a railway communication dynamic environment monitoring system according to claim 1, characterized in that: The temperature sensor is in close contact with the positive electrode post through a stainless steel clamp and thermal grease.

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