CN114944514A - Lead-acid storage battery management method and device - Google Patents
Lead-acid storage battery management method and device Download PDFInfo
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- CN114944514A CN114944514A CN202210470402.2A CN202210470402A CN114944514A CN 114944514 A CN114944514 A CN 114944514A CN 202210470402 A CN202210470402 A CN 202210470402A CN 114944514 A CN114944514 A CN 114944514A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention belongs to the technical field of battery management, and relates to a lead-acid storage battery management system which is used for detecting and managing a lead-acid storage battery. The lead-acid storage battery management system comprises a single battery collector, a battery pack collector and an intelligent gateway module; the single battery collector is used for collecting the voltage, the temperature and the internal resistance of the single battery and realizing balance control; the battery pack collector is used for collecting pack voltage, charging and discharging current, ambient temperature, ripple voltage and insulation resistance of the battery pack; the intelligent gateway module is used for analyzing, processing, displaying and managing the acquired data, and uploading the acquired data to the cloud server for data display and storage. The storage battery management system designed by the invention can monitor the working state of the storage battery in real time, effectively manage and maintain the storage battery, prolong the service life, and give corresponding alarms to abnormal conditions according to the set threshold, and has the advantages of low cost, simple structure and stable operation.
Description
Technical Field
The invention relates to a battery management technology, in particular to a lead-acid storage battery management system and a method.
Background
Uninterruptible power supplies UPS are a new type of power electronics equipment that has evolved slowly in the 60's of the 20 th century. Because the UPS can ensure that the power supply is not interrupted and better power supply quality (voltage, waveform and frequency) is ensured, the UPS has wide application field and rapid development speed. The UPS plays an extremely important role in communication hubs, national defense command centers, satellite ground stations, financial departments, high-rise buildings, hospital operating rooms and other scenes. The storage battery is used as an important component of the UPS, plays an extremely important role in the modern economic development and has higher research value. The lead-acid storage battery is a widely used high-capacity battery variety at present, and is widely applied to the fields of communication, energy storage, traffic, national defense and the like. The accumulator industry of China is in a new transformation stage, and the independent innovation capability and innovation achievement of enterprises are obviously improved. The technology of the lead-acid storage battery is mature day by day, and the lead-acid storage battery is low in cost, high in safety and good in stability.
With the use and aging of the storage battery, various index performances of the storage battery are degraded to different degrees, including the capacity attenuation and the voltage imbalance of the storage battery, and the service life of the storage battery is greatly reduced. Therefore, a battery management system is needed to monitor the working state of the battery in real time so as to protect the storage battery from being overcharged or overdischarged, and effectively prolong the service life of the storage battery; in addition, the change of the internal resistance of the battery reflects the health condition of the battery, the internal resistance is increased to indicate the deterioration of the battery, the deterioration degree of the battery in the battery pack can be judged by detecting the internal resistance of the battery, early warning is carried out on the abnormal condition of the internal resistance, and the safe and reliable operation of the battery pack is ensured.
In the existing products, the defects such as unclear running condition and performance state of the storage battery still exist; the effective system data management is lacked, and the management and maintenance concept is laggard; the field maintenance work needs professional personnel to operate one by one, the efficiency is lower, and potential safety hazards exist.
The lead-acid storage battery management system realizes the functions of collecting the voltage, the temperature and the internal resistance of the single battery, collecting the voltage, the charge and discharge current, the ripple voltage, the insulation resistance and the like of the battery pack, alarming abnormal information, carrying out equalization processing on the single battery and the like, and is an essential part in the application of a plurality of lead-acid storage batteries.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the lead-acid storage battery management system which can monitor the working state of the storage battery in real time, give an alarm in time for abnormal phenomena in operation and effectively ensure the service life of the storage battery.
A lead-acid storage battery management system is used for monitoring and managing a lead-acid storage battery in real time and comprises a single battery collector, a battery pack collector and an intelligent gateway module; the single battery collector is connected with the storage battery equipment in a four-wire system mode, is powered by the storage battery and is used for collecting single battery data; the battery pack collector is connected with two ends of the battery pack and used for collecting battery pack data; the intelligent gateway module is connected with the single battery acquisition module and the battery pack acquisition module through a serial bus and is used for collecting real-time data of the single battery and the battery pack for analysis, processing and management; the intelligent gateway module is communicated with upper computer software through an RS485 bus and used for data viewing and system configuration; the intelligent gateway module is communicated with the cloud server through the Ethernet interface and used for data storage and management.
Further, initializing a hardware circuit and loading configuration parameters after the software program of the single battery collector starts; then judging whether an operation instruction exists or not, if the operation instruction exists, returning a corresponding instruction under the condition of no internal resistance measurement requirement if the operation instruction exists in a Modbus instruction for inquiring temperature, voltage and internal resistance or in an AT instruction for address setting, measurement calibration and data inquiry, operating a corresponding switch to independently start an internal resistance measurement channel if the operation instruction exists in the Modbus instruction, voltage and internal resistance inquiry, and calculating an internal resistance value after ADC (analog to digital converter) timing sampling; and if no operation instruction exists, the ADC performs timing sampling and calculates a temperature value and a voltage value.
Further, after the software program of the battery pack collector starts, a hardware circuit is initialized and configuration parameters are loaded; then judging whether an operation instruction exists or not, and if an AT instruction for inquiring group voltage, inquiring charging and discharging current, inquiring temperature, inquiring ripple voltage, inquiring insulation resistance or measuring calibration and data inquiry exists, returning a corresponding instruction; if no relevant operation instruction exists, the ADC performs sampling at regular time, and measures and calculates a group voltage value, a group charging and discharging current value, a temperature value, a ripple voltage value and an insulation resistance value.
Further, after the intelligent gateway module program starts, firstly, the effective single batteries in the current effective battery pack are obtained; then, marking the current battery pack query instruction by 1, and simultaneously sending the battery pack query instructions in sequence every 50 ms; then the battery pack collector module returns a command after receiving the query command, and meanwhile, the zone bit is clear 0; the intelligent gateway module receives the return instruction through serial port interruption and judges and sends the flag bit, if the flag bit is 1, the corresponding query instruction is sent again, if the flag bit is 0, the query process of the effective single batteries in the group is carried out, each effective single battery needs to be searched in a traversing manner, the specific query process is similar to the query process of the battery pack, and the detailed description is omitted; and finally, repeatedly checking the abnormal condition of the instruction return within a certain time to ensure the accuracy and stability of the whole acquisition process. Thus, the transmit query logic for an active battery pack is complete.
In the above case, if a plurality of valid battery packs are connected, the intelligent gateway module does not sequentially query one by one, but adopts an approximately parallel query mode, and the instruction sending interval of the same type is 5 ms. For example, if the system has 3 valid battery packs, the difference between the first battery pack inquiry command of the valid battery pack No. 1 and the first battery pack inquiry command of the valid battery pack No. 2 is 5ms, and the difference between the first battery pack inquiry command of the valid battery pack No. 2 and the first battery pack inquiry command of the valid battery pack No. 3 is 5 ms; after 50ms, the second battery pack query command is also sequentially sent to 3 effective battery packs at an interval of 5 ms; after 50ms, the third battery pack query instruction is also sequentially sent to 3 effective battery packs at an interval of 5 ms; similarly, the valid cells in the 3 valid battery packs are also queried with the logic described above. Here, 50ms is used as the sending interval of the serial commands, so that the communication of normal equipment is ensured to be successful, and the serial commands are not conflicted; 500ms is used as the repeated check time of the abnormal return instruction to ensure that the correct return instruction is received as far as possible; and 5ms is used as a sending gap of the parallel instruction, so that the time length required by query is shortened, and the running load of the singlechip is relieved.
Further, the single battery collector collects voltage, temperature and internal resistance data of the single battery.
Further, the battery pack collector collects data of the battery pack, such as pack voltage, charge and discharge current, ambient temperature, ripple voltage, insulation resistance and the like.
Furthermore, the intelligent gateway module realizes analysis, processing and management of the acquired data, can perform real-time data viewing and simple system configuration through an LCD display screen and upper computer software, and can report the system data to the cloud server through the Ethernet interface so as to realize storage and management of the data.
Furthermore, the lead-acid storage battery management system collects temperature through the NTC temperature sensor and processes data by adopting a piecewise linear fitting method, so that the precision is effectively improved.
Further, the lead-acid storage battery management system collects charging and discharging currents through a current transformer.
Further, the lead-acid storage battery management system measures the internal resistance of the single battery through a method of alternating low-current discharge detection.
The invention also has the function of ripple voltage detection, and the ripple signal is processed into a direct current signal representing the amplitude of the ripple signal after the signal is processed by a blocking, amplifying and peak detecting circuit, and then the ripple voltage is obtained after analog-to-digital conversion and data processing.
The invention also has the function of detecting the insulation resistance, and the insulation performance is judged by a reference resistance measurement method.
The invention also has a balancing function, and the single battery which is higher than the preset voltage threshold is subjected to additional discharge treatment in a passive balancing mode.
The invention has the following advantages and effects:
1. the invention can monitor the working state of the storage battery system in real time by acquiring the real-time data of the single batteries and the battery pack and analyzing and processing the data by the intelligent gateway module, and can alarm abnormal phenomena in the operation process, thereby effectively maintaining the storage battery, delaying the service life of the storage battery and ensuring the safe, reliable and stable operation of the lead-acid storage battery system.
2. The invention has friendly man-machine interaction approach: real-time data viewing and simple system configuration can be carried out through an LCD display screen on the intelligent gateway module; data viewing and system configuration can be carried out through upper computer software; data display and storage management can be performed through the cloud server.
3. The system integrates the acquisition and control functions into a whole, has lower cost, simple structure, stability and reliability, and can be widely applied to the related fields of subways, energy storage and the like.
Drawings
FIG. 1 is a block diagram of the system architecture of the present invention; FIG. 2 is a block diagram of a single battery collector; FIG. 3 is a block diagram of a battery pack collector; FIG. 4 is a block diagram of a smart gateway module; FIG. 5 is a flow chart of the cell collector software; FIG. 6 is a battery pack collector software flow chart; fig. 7 is a flow chart of the logic of sending queries by the intelligent gateway module.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the lead-acid storage battery management system of the invention comprises a single battery collector, a battery pack collector and an intelligent gateway module; the single battery collector is connected with the storage battery equipment in a four-wire system mode, is powered by the storage battery and is used for collecting single battery data; the battery pack collector is connected with two ends of the battery pack and used for collecting battery pack data; the intelligent gateway module is connected with the single battery acquisition module and the battery pack acquisition module through a serial bus and is used for collecting real-time data of the single battery and the battery pack for analysis, processing and management; the intelligent gateway module is communicated with upper computer software through an RS485 bus and used for data viewing and system configuration; the intelligent gateway module is communicated with the cloud server through the Ethernet interface and used for data storage and management. As shown in fig. 2, the single battery collector of the system of the present invention includes a microcontroller, an internal resistance collecting circuit, a voltage collecting circuit, a temperature collecting circuit, a power interface, and a communication cascade interface. The voltage acquisition circuit, the temperature acquisition circuit and the internal resistance acquisition circuit realize the function of acquiring the voltage, the temperature and the internal resistance data of the single battery in real time, and the communication cascade interface is communicated with the intelligent gateway module through a serial bus. As shown in fig. 3, the battery pack collector of the system of the present invention includes a microcontroller, a voltage collecting circuit, a current collecting circuit, a temperature collecting circuit, an insulation detecting circuit, a ripple collecting circuit, a power interface, and a communication cascade interface. The voltage acquisition circuit, the current acquisition circuit, the temperature acquisition circuit, the insulation detection circuit and the ripple acquisition circuit realize the function of acquiring the group voltage, the charging and discharging current, the environment temperature, the insulation resistance and the ripple voltage data of the battery pack in real time, and the communication cascade interface communicates with the intelligent gateway module through a serial bus. As shown in fig. 4, the intelligent gateway module of the system of the present invention includes a microcontroller, a COM1 port, a COM2 port, a COM3 port, a COM4 port, a LAN port, an RS485 port, an LCD display circuit, a key circuit, an LED circuit, and a power interface. The COM1 port, the COM2 port, the COM3 port and the COM4 port realize the functions of collecting and inquiring real-time data collected by a single battery collector and a battery pack collector; the Ethernet interface is communicated with the cloud server and used for data storage and management; the RS485 port is communicated with upper computer software and used for data viewing and system configuration; the LCD display screen circuit is used for displaying and checking real-time data and alarm information and supporting a simple system configuration function; the key circuit is used as an input unit of the LCD display screen circuit, and can realize the menu key functions of returning, previous step, next step and confirmation; the LED circuit mainly indicates the communication state, the network connection state, the power supply state and the alarm state of the system. Fig. 5 is a software flowchart of the cell collector. Initializing a hardware circuit and loading configuration parameters after starting; then judging whether an operation instruction exists, if the Modbus instruction for inquiring temperature, voltage and internal resistance or the AT instruction for address setting, measurement calibration and data inquiry exist, returning a corresponding instruction under the condition of no internal resistance measurement requirement, if the internal resistance measurement requirement exists, operating a corresponding switch to independently start an internal resistance measurement channel, and calculating an internal resistance value after ADC (analog to digital converter) timing sampling; and if no operation instruction exists, the ADC performs timing sampling and calculates a temperature value and a voltage value. Fig. 6 shows a software flowchart of the battery pack collector. Initializing a hardware circuit and loading configuration parameters after starting; then judging whether an operation instruction exists or not, and if an AT instruction for inquiring group voltage, inquiring charging and discharging current, inquiring temperature, inquiring ripple voltage, inquiring insulation resistance or measuring calibration and data inquiry exists, returning a corresponding instruction; if no relevant operation instruction exists, the ADC performs sampling at regular time, and measures and calculates a group voltage value, a group charging and discharging current value, a temperature value, a ripple voltage value and an insulation resistance value.
Fig. 7 is a flow chart of logic for sending queries by the intelligent gateway module, and the case of one active battery pack will be discussed first. After the starting, firstly, obtaining effective single batteries in the current effective battery pack; then, marking the current battery pack query instruction by 1, and simultaneously sending the battery pack query instructions in sequence every 50 ms; then the battery pack collector module returns a command after receiving the query command, and meanwhile, the zone bit is clear 0; the intelligent gateway module receives the return instruction through serial port interruption and judges and sends the flag bit, if the flag bit is 1, the corresponding query instruction is sent again, if the flag bit is 0, the query process of the effective single batteries in the group is carried out, each effective single battery needs to be searched in a traversing manner, the specific query process is similar to the query process of the battery pack, and the detailed description is omitted; and finally, repeatedly checking the abnormal condition of the instruction return within a certain time to ensure the accuracy and stability of the whole acquisition process. In this way, the transmit query logic for an active battery pack is completed. Aiming at the condition of a plurality of effective battery packs, the intelligent gateway module does not sequentially inquire one by one, but adopts an approximate parallel inquiry mode, and the instruction sending interval of the same type is 5 ms. For example, if the system has 3 valid battery packs, the difference between the first battery pack inquiry command of the valid battery pack No. 1 and the first battery pack inquiry command of the valid battery pack No. 2 is 5ms, and the difference between the first battery pack inquiry command of the valid battery pack No. 2 and the first battery pack inquiry command of the valid battery pack No. 3 is 5 ms; after 50ms, the second battery pack query command is also sequentially sent to 3 effective battery packs at an interval of 5 ms; after 50ms, the third battery pack query instruction is also sequentially sent to 3 effective battery packs at an interval of 5 ms; similarly, the valid cells in the 3 valid battery packs are also queried with the logic described above. Here, 50ms is used as the sending interval of the serial commands, so that the communication of normal equipment is ensured to be successful, and the serial commands are not conflicted; 500ms is used as the repeated check time of the abnormal return instruction to ensure that the correct return instruction is received as far as possible; and 5ms is used as a sending gap of the parallel instruction, so that the time length required by query is shortened, and the running load of the singlechip is relieved.
Furthermore, the single battery collector collects parameters such as voltage and internal resistance by adopting a differential amplification and four-wire system mode, and reduces the influence caused by signal common mode interference and connecting wire resistance.
Voltage acquisition: the invention collects the voltage values of the single batteries and the battery pack. The voltage value is input to an analog-to-digital converter (ADC) of the single chip microcomputer after passing through the signal conditioning circuit, and the voltage value is calculated by the single chip microcomputer; due to the line resistance and the contact resistance of the connecting lines between the single batteries, the total voltage of the battery pack cannot simply calculate the accumulated value of the voltage of each single battery, but the voltages at two ends of the battery pack are measured, otherwise, a large accumulated error is caused.
Current collection: the current collection can effectively judge the current charge and discharge state of the storage battery and the magnitude of the charge and discharge current. And timely adjusting the threshold value according to the real-time charging and discharging state of the storage battery to protect the storage battery. The current transformer and related hardware circuits convert the current signals into voltage signals, the voltage signals are input into the single chip microcomputer ADC module, and the single chip microcomputer calculates to obtain current values.
Temperature collection: the NTC temperature sensor is used for acquiring temperature data, and the current temperature value is calculated by a mathematical method of piecewise linear fitting after analog-to-digital conversion of an ADC (analog-to-digital converter) module in the singlechip.
Internal resistance collection: the internal resistance acquisition adopts a method of alternating small current discharge detection. The single chip microcomputer outputs a pulse alternating current signal with a certain frequency to control the on-off of the MOS tube to generate alternating current, weak alternating voltage can be generated when the alternating current flows through the storage battery, and alternating internal resistance, namely alternating voltage/alternating current, can be calculated by measuring the alternating current and the alternating voltage.
The invention also has a balancing function, and the single battery which is higher than the preset voltage threshold is subjected to additional discharge treatment in a passive balancing mode.
The invention also has the function of ripple voltage detection, and the ripple signal is processed into a direct current signal representing the amplitude of the ripple signal after the signal is processed by a blocking, amplifying and peak detecting circuit, and then the ripple voltage is obtained after analog-to-digital conversion and data processing.
The invention also has the function of detecting the insulation resistance, adopts a reference resistance measuring method, switches the reference resistance through a switch, further obtains the positive insulation resistance and the negative insulation resistance, wherein the smaller value is the insulation resistance, judges the insulation performance of the storage battery system according to the value, and checks whether the leakage occurs.
The invention can carry out alarm processing on abnormal phenomena in operation so as to ensure that the storage battery system operates safely, reliably and stably. The abnormal phenomena include: the cell voltage is high, the cell voltage is low, the cell internal resistance is high, the cell internal resistance is low, the cell temperature is high, the cell temperature is low, the cell internal resistance is uneven, the floating charge voltage is high, the floating charge voltage is low, the cell is open-circuited, the cell grounding alarm is given, the cell group voltage is high, the cell group voltage is low, the charging current is large, the discharging current is large, the floating charge group voltage is high, the floating charge group voltage is low, the ripple is overlarge, the insulation resistance is too low, the communication fault is caused, and the like.
The invention takes the key module as input, and carries out real-time data viewing and simple system configuration through the menu of the LCD display screen; data viewing and system configuration are carried out through upper computer software; data display and storage management can be performed through the cloud server.
According to the invention, by collecting the real-time data of the single batteries and the battery pack and analyzing and processing the data through the intelligent gateway module, the working state of the storage battery system can be monitored in real time, and the alarm processing is carried out on the abnormal phenomenon in the operation process, so that the storage battery can be effectively maintained, the service life of the storage battery is prolonged, and the safe, reliable and stable operation of the lead-acid storage battery system is ensured; has friendly man-machine interaction approach: real-time data viewing and simple system configuration can be carried out through an LCD display screen on the intelligent gateway module; data viewing and system configuration can be carried out through upper computer software; data display and storage management can be carried out through a cloud server; the system integrates the acquisition and control functions into a whole, has lower cost, simple structure, stability and reliability, and can be widely applied to the related fields of subways, energy storage and the like.
The above-described embodiments are intended to be illustrative of the present invention and many further modifications and substitutions may be made in the principles of the present invention and these are considered to be protective of the invention.
Claims (10)
1. A lead-acid storage battery management system is characterized by comprising a single battery collector, a battery pack collector and an intelligent gateway module, wherein the single battery collector is connected with a storage battery, the battery pack collector is connected to two ends of the battery pack, and the battery pack is formed by connecting n storage batteries in series; the intelligent gateway module analyzes, processes and manages the acquired data, displays the data on an LCD display screen in real time and makes simple configuration; the intelligent gateway module can upload data to a cloud server for data display and management.
2. The lead-acid storage battery management system according to claim 1, wherein the single battery collector modules are connected to two ends of the storage battery and are used for collecting voltage, temperature and internal resistance information of the single batteries in real time; the battery pack collector is connected with two ends of the battery pack and collects pack voltage, charging and discharging current, ambient temperature, ripple voltage and insulation resistance information of the battery pack in real time; the single battery collector module and the battery pack collector module are connected and communicated with the intelligent gateway module through a serial bus; the intelligent gateway queries real-time data information acquired by the acquisition module through a serial port in parallel, analyzes and processes the real-time data information through the single chip microcomputer, and performs alarm processing on abnormal signals; an LCD display screen on the intelligent gateway module and upper computer software form a human-computer interface, so that collected data can be checked in real time and system configuration can be carried out; the cloud platform server is communicated with the intelligent gateway module through the Ethernet, and a background management module formed by the cloud platform server stores and manages the acquired data.
3. The lead-acid battery management system according to claim 1, wherein a hardware circuit is initialized and configuration parameters are loaded after a software program of a single battery collector starts; then judging whether an operation instruction exists or not, if the operation instruction exists, returning a corresponding instruction under the condition of no internal resistance measurement requirement if the operation instruction exists in a Modbus instruction for inquiring temperature, voltage and internal resistance or in an AT instruction for address setting, measurement calibration and data inquiry, operating a corresponding switch to independently start an internal resistance measurement channel if the operation instruction exists in the Modbus instruction, voltage and internal resistance inquiry, and calculating an internal resistance value after ADC (analog to digital converter) timing sampling; and if no operation instruction exists, the ADC performs timing sampling and calculates a temperature value and a voltage value.
4. The lead-acid battery management system of claim 1, wherein the battery pack collector software program initializes a hardware circuit and loads configuration parameters after starting; then judging whether an operation instruction exists or not, and if an AT instruction for inquiring group voltage, inquiring charging and discharging current, inquiring temperature, inquiring ripple voltage, inquiring insulation resistance or measuring calibration and data inquiry exists, returning a corresponding instruction; if no relevant operation instruction exists, the ADC performs sampling at regular time, and measures and calculates a group voltage value, a group charging and discharging current value, a temperature value, a ripple voltage value and an insulation resistance value.
5. The lead-acid battery management system according to claim 1, wherein after the intelligent gateway module program starts, the effective single batteries in the currently effective battery pack are obtained first; then, marking the current battery pack query instruction by 1, and simultaneously sending the battery pack query instructions in sequence every 50 ms; then the battery pack collector module returns a command after receiving the query command, and the flag bit is clear 0; the intelligent gateway module receives the return instruction through serial port interruption and judges and sends the flag bit, if the flag bit is 1, the corresponding query instruction is sent again, if the flag bit is 0, the query process of the effective single batteries in the group is carried out, and each effective single battery needs to be queried in a traversing manner; finally, repeated check is carried out on the abnormal condition returned by the instruction within a certain time, and the accuracy and the stability of the whole acquisition process are ensured; thus, the transmit query logic for an active battery pack is complete.
6. The lead-acid battery management system of claim 1, wherein the intelligent gateway module performs data query in a parallel query manner, thereby greatly improving the system operation speed and efficiency.
7. The lead-acid battery management system of claim 1, wherein a piecewise linear fitting scheme is adopted for Temperature acquisition, the Temperature sensor is an NTC (negative Temperature coefficient) thermistor, and the Temperature sensor is connected to the acquisition device and connected to the battery device.
8. The lead-acid battery management system according to claim 1, wherein the single battery collector has an internal resistance collection function, and the internal resistance detection is performed by adopting an alternating low-current discharge scheme.
9. The lead-acid battery management system of claim 1, wherein the system has an equalization processing function, and the single batteries above a preset threshold are additionally discharged in a passive equalization mode until the system is consistent with a preset value.
10. The lead-acid battery management system of claim 1, wherein the lead-acid battery collects charge and discharge currents through a current transformer;
the battery pack collector has a ripple voltage detection function and an insulation resistance detection function;
the lead-acid storage battery management system can perform alarm processing on abnormal signals;
the intelligent gateway module realizes a human-computer interaction function through an LCD display screen;
the intelligent gateway module is in data communication with upper computer software through a 485 bus and is in data communication with a cloud server through an Ethernet interface;
the anomaly signal includes: an alarm signal and a fault alarm signal are measured.
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| CN202210470402.2A CN114944514A (en) | 2022-04-28 | 2022-04-28 | Lead-acid storage battery management method and device |
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| CN202210470402.2A CN114944514A (en) | 2022-04-28 | 2022-04-28 | Lead-acid storage battery management method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663312A (en) * | 2022-12-27 | 2023-01-31 | 深圳市今朝时代股份有限公司 | Battery operation monitoring system and method based on battery protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663312A (en) * | 2022-12-27 | 2023-01-31 | 深圳市今朝时代股份有限公司 | Battery operation monitoring system and method based on battery protection |
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