CN113671398B - Storage battery internal resistance real-time monitoring device and monitoring method thereof - Google Patents
Storage battery internal resistance real-time monitoring device and monitoring method thereof Download PDFInfo
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- CN113671398B CN113671398B CN202110978592.4A CN202110978592A CN113671398B CN 113671398 B CN113671398 B CN 113671398B CN 202110978592 A CN202110978592 A CN 202110978592A CN 113671398 B CN113671398 B CN 113671398B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 82
- 238000012806 monitoring device Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000012423 maintenance Methods 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000012360 testing method Methods 0.000 claims description 20
- 230000036541 health Effects 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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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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- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a device and a method for monitoring internal resistance of a storage battery in real time, wherein the device comprises the following steps: the control terminal is used for carrying out real-time control on each element in the storage battery internal resistance real-time monitoring device according to real-time operation instructions of operators, receiving real-time data detected by each element in the storage battery internal resistance real-time monitoring device and sending corresponding maintenance instructions according to the detection data.
Description
Technical Field
The invention belongs to the field of storage battery monitoring, and particularly relates to a storage battery internal resistance real-time monitoring device and a monitoring method thereof.
Background
In the prior art, a transformer substation direct current operation power supply system is an important component device for guaranteeing safe and stable operation of transformer substation equipment, uninterrupted power supply is provided for loads when alternating current is in power failure, a storage battery pack is one of key equipment of the transformer substation direct current operation power supply system, capacity of a storage battery is presented in an increasing state along with improvement of a transformer substation grade, cost of the storage battery pack is presented in an increasing curve, cost proportion of the storage battery pack in the whole set of equipment is far greater than cost proportion occupied by a rectification power supply, and effective remote maintenance management is achieved for the direct current operation power supply system and the storage battery of the direct current operation power supply system along with popularization and construction of an unattended transformer substation.
However, when the conventional storage battery internal resistance real-time monitoring device is used, the internal resistance of the storage battery pack of the transformer substation can be evaluated and monitored only, so that the accuracy of a monitoring result is poor, and the state of health of the storage battery pack at the moment cannot be evaluated timely according to the monitoring result of the internal resistance, so that the storage battery pack cannot be maintained timely, and the practical application is not facilitated.
Disclosure of Invention
The invention aims to solve the problems, and provides a device and a method for monitoring the internal resistance of a storage battery in real time, which solve the problems in the background art.
In order to solve the problems, the invention provides a technical scheme that:
a device for monitoring internal resistance of a storage battery in real time, comprising:
The control terminal is used for carrying out real-time control on each element in the storage battery internal resistance real-time monitoring device according to the real-time operation instruction of an operator, receiving real-time data detected by each element in the storage battery internal resistance real-time monitoring device and sending out corresponding maintenance instructions according to the detection data;
The storage battery pack is used for providing a direct-current operation power supply for the transformer substation;
The battery collector is used for monitoring terminal voltage of each battery of the storage battery pack, temperature and humidity of a machine room and calculating an internal resistance value of the storage battery pack according to discharge conditions of the storage battery pack;
the battery monitoring and maintaining unit is used for maintaining a single battery of the storage battery pack according to the internal resistance value of the storage battery pack calculated by the battery collector;
an operation state monitoring unit for monitoring the operation state of the storage battery pack;
The internal resistance testing unit is used for controlling the storage battery pack to discharge and simultaneously calculating the internal resistance value of the storage battery pack in cooperation with the battery collector.
Preferably, the battery collector, the battery monitoring maintenance unit, the running state monitoring unit and the internal resistance testing unit are all in bidirectional electrical connection with the control terminal, the battery collector, the battery monitoring maintenance unit, the running state monitoring unit and the internal resistance testing unit are all in bidirectional electrical connection with the storage battery, and the output end of the battery collector is in electrical connection with the input end of the internal resistance testing unit.
Preferably, the operation state monitored by the operation state monitoring unit comprises a battery pack terminal voltage, a direct current bus positive electrode ground voltage and a direct current bus negative electrode ground voltage.
Preferably, a Central Processing Unit (CPU), a Random Access Memory (RAM), a bus light isolation interface, a power supply and an A/D interface are arranged in the battery collector;
The CPU is used for controlling the operation inside the battery collector according to the received control instruction;
The random access memory RAM is used for writing or storing the data acquired and calculated by the battery acquisition device;
The bus light isolation interface is used for providing a communication connection interface for the battery collector;
The power supply is used for providing power supply for the battery collector;
The A/D interface is used for converting the received analog signals into digital signals and transmitting the digital signals to the inside of the CPU.
Preferably, the RAM, the bus optical interface, the power supply and the A/D interface are all electrically connected with the CPU.
Preferably, the battery monitoring and maintaining unit comprises a first maintenance module, a second maintenance module, a detection module and a maintenance host;
The maintenance host is used for circularly collecting signals input by each signal interface, carrying out operation and storage on the signals, and also sending all collected and stored data in a serial mode to complete real-time data transmission;
the first maintenance module and the second maintenance module are used for carrying out charging maintenance on the single batteries corresponding to the storage battery pack;
the detection module is used for detecting the total current and the total voltage of the storage battery pack.
Preferably, the first maintenance module, the second maintenance module and the detection module are all electrically connected with a maintenance host, and the maintenance host and the control terminal keep real-time data intercommunication through the internet.
A monitoring method of a storage battery internal resistance real-time monitoring device comprises the following steps:
S1, monitoring the running state of a storage battery pack in real time through a running state monitoring unit, wherein the running state monitoring unit comprises a storage battery pack terminal voltage, a direct current bus positive electrode ground voltage and a direct current bus negative electrode ground voltage, and simultaneously the running state monitoring unit transmits monitored data to a control terminal in real time;
S2, when the resistance value inside the storage battery pack is required to be monitored, a control command is transmitted to the battery collector through the control terminal, then the battery collector sends out a remote control command, the internal resistance test unit starts to work, the storage battery pack is discharged, the internal resistance value of the storage battery pack is calculated by the battery collector according to discharge data, and meanwhile the battery collector transmits the calculated data to the control terminal;
S3, the control terminal receives the internal resistance value data calculated by the battery collector, calculates the state of health SOH of the storage battery according to a state of health calculation formula, and then sends a control instruction to the battery monitoring maintenance unit according to a calculation result;
And S4, the battery monitoring and maintaining unit controls the detecting module to monitor the total current and the total voltage of the storage battery pack according to the received control instruction, and then controls the first maintenance module and the second maintenance module to work according to the monitoring result, and controls the auxiliary power supply to charge the corresponding storage battery single section respectively.
Preferably, the health state calculation formula in the step S3 is:
soh= (R EOL-R)/(REOL-Rnew), where R EOL is the internal resistance at the end of the battery life, R new is the initial internal resistance of the battery just put into operation, and R is the internal resistance actually measured by the battery in the current state.
The beneficial effects of the invention are as follows: according to the invention, the battery collector and the internal resistance testing unit are mutually matched, so that the internal resistance value of the storage battery can be accurately calculated while the storage battery is discharged, the health state of the storage battery at the moment is calculated according to the ratio of internal resistance change, and meanwhile, the maintenance unit is matched, and the maintenance module is used for controlling the auxiliary power supply to charge the storage battery singly, so that the voltages of all the single batteries of the storage battery used on line tend to be consistent, the capacity of each single battery can be fully ensured, the service life of the storage battery is prolonged, and the practical application is facilitated.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic diagram of the whole structure of a device for monitoring the internal resistance of a storage battery in real time;
FIG. 2 is a schematic block diagram of a battery harvester according to the present invention;
fig. 3 is a schematic block diagram of a battery monitoring and maintenance unit of the present invention.
In the figure: 1. a control terminal; 2. a battery pack; 3. a battery collector; 4. a battery monitoring and maintaining unit; 5. an operation state monitoring unit; 6. an internal resistance test unit.
Detailed Description
As shown in fig. 1-3, the present embodiment adopts the following technical scheme:
Examples:
a device for monitoring internal resistance of a storage battery in real time, comprising:
The control terminal 1 is used for carrying out real-time control on each element in the storage battery internal resistance real-time monitoring device according to an operator real-time operation instruction, receiving real-time data detected by each element in the storage battery internal resistance real-time monitoring device, and sending out corresponding maintenance instructions according to the detection data;
the storage battery pack 2 is used for providing a direct-current operation power supply for the transformer substation;
The battery collector 3 is used for monitoring terminal voltage of each battery of the storage battery pack 2, temperature and humidity of a machine room, and calculating an internal resistance value of the storage battery pack according to discharge conditions of the storage battery pack 2;
A battery monitoring and maintaining unit 4, configured to maintain a single battery of the storage battery pack 2 according to the internal resistance value of the storage battery pack 2 calculated by the battery collector 3;
an operation state monitoring unit 5 for monitoring an operation state of the battery pack 2;
an internal resistance testing unit 6, configured to control the storage battery pack 2 to discharge, and simultaneously calculate an internal resistance value of the storage battery pack 2 in cooperation with the battery collector 3;
The control terminal 1, the storage battery pack 2, the battery collector 3, the battery monitoring maintenance unit 4, the running state monitoring unit 5 and the internal resistance testing unit 6 are arranged to jointly form a storage battery internal resistance real-time monitoring device, and meanwhile, the control terminal 1 is convenient for better controlling the whole equipment.
The battery collector 3, the battery monitoring and maintaining unit 4, the running state monitoring unit 5 and the internal resistance testing unit 6 are electrically connected with the control terminal 1 in a bidirectional manner, so that the integral operation of the equipment is ensured better; the battery collector 3, the battery monitoring and maintaining unit 4, the running state monitoring unit 5 and the internal resistance testing unit 6 are all in bidirectional electrical connection with the storage battery pack 2, so that the storage battery pack 2 is convenient for supplying power to the whole equipment; the output end of the battery collector 3 is electrically connected with the input end of the internal resistance test unit 6, so that the data intercommunication between the battery collector 3 and the internal resistance test unit 6 can be ensured better.
The operation state monitored by the operation state monitoring unit 5 comprises end voltage of the storage battery pack 2, voltage of a direct current bus, voltage of a positive electrode of the direct current bus to the ground, voltage of a negative electrode of the direct current bus to the ground, and a monitoring range of the operation state monitoring unit 5 is guaranteed conveniently.
The battery collector 3 is internally provided with a central processing unit CPU, a random access memory RAM, a bus light isolation interface, a power supply and an A/D interface, so that the normal operation and data transmission of the battery collector 3 are better ensured;
The CPU is used for controlling the operation inside the battery collector 3 according to the received control instruction;
the random access memory RAM is used for writing or storing the data acquired and calculated by the battery acquisition device 3;
the bus light isolation interface is used for providing a communication connection interface for the battery collector 3;
The power supply is used for providing power supply for the battery collector 3;
The A/D interface is used for converting the received analog signals into digital signals and transmitting the digital signals to the inside of the CPU.
The RAM, the bus optical isolation interface, the power supply and the A/D interface are electrically connected with the CPU, so that the RAM, the bus optical isolation interface, the power supply and the A/D interface can be controlled better through the CPU.
The battery monitoring and maintaining unit 4 comprises a first maintenance module, a second maintenance module, a detection module and a maintenance host, so that the battery monitoring and maintaining unit 4 can be formed better;
The maintenance host is used for circularly collecting signals input by each signal interface, carrying out operation and storage on the signals, and also sending all collected and stored data in a serial mode to complete real-time data transmission;
The first maintenance module and the second maintenance module are used for carrying out charging maintenance on the single batteries corresponding to the storage battery pack 2;
The detection module is used for detecting the total current and the total voltage of the storage battery pack 2, and the detection module and the first maintenance module are matched with each other, so that double detection and maintenance work can be completed better.
The first maintenance module, the second maintenance module and the detection module are electrically connected with the maintenance host, and the maintenance host and the control terminal 1 keep real-time data intercommunication through the Internet, so that the whole equipment can be observed and controlled better through the maintenance host.
A monitoring method of a storage battery internal resistance real-time monitoring device comprises the following steps:
s1, monitoring the running state of the storage battery pack 2 in real time through a running state monitoring unit 5, wherein the running state monitoring unit comprises voltage at the end of the storage battery pack 2, voltage of a direct current bus, voltage of a positive electrode of the direct current bus and voltage of a negative electrode of the direct current bus to the ground, and meanwhile the running state monitoring unit 5 transmits monitored data to the control terminal 1 in real time;
S2, when the resistance value inside the storage battery pack 2 needs to be monitored, a control command is transmitted to the battery collector 3 through the control terminal 1, then the battery collector 3 sends a remote control command, the internal resistance test unit 6 starts to work, the storage battery pack 2 is discharged, the battery collector 3 calculates the internal resistance value of the storage battery pack 2 according to discharge data, and meanwhile the battery collector 3 transmits the calculated data to the control terminal 1;
S3, the control terminal 1 receives the internal resistance value data calculated by the battery collector 3, calculates the state of health SOH of the storage battery pack 2 according to a state of health calculation formula, and then sends a control instruction to the battery monitoring maintenance unit 4 according to a calculation result;
And S4, the battery monitoring and maintaining unit 4 controls the detection module to monitor the total current and the total voltage of the storage battery pack 2 according to the received control instruction, and then controls the first maintenance module and the second maintenance module to work according to the monitoring result, and controls the auxiliary power supply to charge the corresponding storage battery single section respectively.
Wherein, the health state calculation formula in the step S3 is as follows:
SOH= (R EOL-R)/(REOL-Rnew), wherein R EOL is the internal resistance when the service life of the battery is ended, R new is the initial internal resistance when the battery is just put into operation, and R is the internal resistance actually measured by the battery in the current state, so that the internal resistance of the storage battery can be calculated and monitored in real time better, and corresponding maintenance operation can be performed on the storage battery better according to the monitoring result.
Specific: in practical application, firstly, the running state of the storage battery pack 2 is monitored in real time through the running state monitoring unit 5, wherein the running state comprises the voltage of the end of the storage battery pack 2, the voltage of a direct current bus, the voltage of the positive electrode of the direct current bus and the voltage of the negative electrode of the direct current bus to the ground, meanwhile, the running state monitoring unit 5 transmits monitored data to the control terminal 1 in real time, the control terminal 1 controls all elements in the storage battery internal resistance real-time monitoring device in real time according to an operator real-time operation instruction, and meanwhile, receives real-time data detected by all elements in the storage battery internal resistance real-time monitoring device and sends corresponding maintenance instructions according to the detected data; when the resistance value inside the storage battery pack 2 needs to be monitored, a control command is transmitted to the battery collector 3 through the control terminal 1, then the battery collector 3 sends a remote control command, the internal resistance test unit 6 starts to work, the storage battery pack 2 is discharged, the internal resistance value of the storage battery pack 2 is calculated by the battery collector 3 according to discharge data, the terminal voltage of each battery of the storage battery pack 2, the temperature and the humidity of a machine room are monitored, and meanwhile the battery collector 3 transmits the calculated data to the control terminal 1; the control terminal 1 receives the internal resistance value data calculated by the battery collector 3, calculates the state of health SOH of the storage battery 2 according to a state of health calculation formula, wherein the state of health calculation formula is soh=r EOL-R/REOL-Rnew, wherein R EOL is the internal resistance when the service life of the battery is ended, R new is the initial internal resistance when the battery is just put into operation, R is the internal resistance actually measured by the battery in the current state, then sends a control instruction to the battery monitoring and maintaining unit 4 according to the calculation result, and maintains the single battery of the storage battery 2 through the battery monitoring and maintaining unit 4; the battery monitoring and maintaining unit 4 controls the detecting module to monitor the total current and the total voltage of the storage battery pack 2 according to the received control instruction, then controls the first maintenance module and the second maintenance module to work according to the monitoring result, and controls the auxiliary power supply to charge the corresponding storage battery single section respectively.
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 therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a battery internal resistance real-time supervision device which characterized in that includes:
The control terminal (1) is used for carrying out real-time control on each element in the storage battery internal resistance real-time monitoring device according to an operator real-time operation instruction, receiving real-time data detected by each element in the storage battery internal resistance real-time monitoring device, and sending out corresponding maintenance instructions according to the detection data;
The storage battery pack (2) is used for providing a direct-current operation power supply for the transformer substation;
The battery collector (3) is used for monitoring the terminal voltage of each battery of the storage battery pack (2), the temperature and the humidity of a machine room and calculating the internal resistance value of the storage battery pack according to the discharging condition of the storage battery pack (2);
A battery monitoring and maintaining unit (4) for maintaining a single battery of the storage battery pack (2) according to the internal resistance value of the storage battery pack (2) calculated by the battery collector (3);
An operating state monitoring unit (5) for monitoring an operating state of the battery pack (2);
the internal resistance testing unit (6) is used for controlling the storage battery pack (2) to discharge and simultaneously calculating the internal resistance value of the storage battery pack (2) by matching with the battery collector (3);
The battery collector (3), the battery monitoring maintenance unit (4), the running state monitoring unit (5) and the internal resistance testing unit (6) are all in bidirectional electrical connection with the control terminal (1), the battery collector (3), the battery monitoring maintenance unit (4), the running state monitoring unit (5) and the internal resistance testing unit (6) are all in bidirectional electrical connection with the storage battery pack (2), and the output end of the battery collector (3) is in electrical connection with the input end of the internal resistance testing unit (6);
The operation state monitored by the operation state monitoring unit (5) comprises end voltage of the storage battery (2), voltage of a direct current bus, voltage of a positive electrode of the direct current bus to ground and voltage of a negative electrode of the direct current bus to ground;
The battery collector (3) is internally provided with a Central Processing Unit (CPU), a Random Access Memory (RAM), a bus light isolation interface, a power supply and an A/D interface;
The CPU is used for controlling the operation inside the battery collector (3) according to the received control instruction;
The random access memory RAM is used for writing or storing the data acquired and calculated by the battery acquisition device (3);
the bus light isolation interface is used for providing a communication connection interface for the battery collector (3);
the power supply is used for providing power supply for the battery collector (3);
The A/D interface is used for converting the received analog signals into digital signals and transmitting the digital signals to the interior of the CPU;
the random access memory RAM, the bus optical isolation interface, the power supply and the A/D interface are electrically connected with the CPU;
The battery monitoring and maintaining unit (4) comprises a first maintenance module, a second maintenance module, a detection module and a maintenance host;
The maintenance host is used for circularly collecting signals input by each signal interface, carrying out operation and storage on the signals, and also sending all collected and stored data in a serial mode to complete real-time data transmission;
The first maintenance module and the second maintenance module are used for carrying out charging maintenance on the single batteries corresponding to the storage battery pack (2);
the detection module is used for detecting the total current and the total voltage of the storage battery pack (2).
2. The device for monitoring the internal resistance of the storage battery in real time according to claim 1, wherein the first maintenance module, the second maintenance module and the detection module are electrically connected with a maintenance host, and the maintenance host and the control terminal (1) keep real-time data intercommunication through the internet.
3. The monitoring method of the storage battery internal resistance real-time monitoring device according to any one of claims 1 to 2, comprising the steps of:
S1, monitoring the running state of a storage battery pack (2) in real time through a running state monitoring unit (5), wherein the running state monitoring unit comprises voltage at the end of the storage battery pack (2), voltage of a direct current bus, voltage of the positive electrode of the direct current bus and voltage of the negative electrode of the direct current bus to the ground, and meanwhile, the running state monitoring unit (5) transmits monitored data to a control terminal (1) in real time;
S2, when the resistance value inside the storage battery (2) needs to be monitored, a control command is transmitted to the battery collector (3) through the control terminal (1), then the battery collector (3) sends out a remote control command, the internal resistance test unit (6) starts to work, the storage battery (2) is discharged, the battery collector (3) calculates the internal resistance value of the storage battery (2) according to discharge data, and meanwhile the battery collector (3) transmits the calculated data to the control terminal (1);
S3, the control terminal (1) receives the internal resistance value data calculated by the battery collector (3), calculates the state of health SOH of the storage battery pack (2) according to a state of health calculation formula, and then sends a control instruction to the battery monitoring maintenance unit (4) according to a calculation result;
And S4, the battery monitoring and maintaining unit (4) controls the detecting module to monitor the total current and the total voltage of the storage battery pack (2) according to the received control instruction, and then controls the first maintenance module and the second maintenance module to work according to the monitoring result, and controls the auxiliary power supply to charge the corresponding storage battery single section respectively.
4. The method for monitoring the internal resistance real-time monitoring device of a storage battery according to claim 3, wherein the calculation formula of the health state in the step S3 is as follows:
soh= (R EOL-R)/(REOL-Rnew), where R EOL is the internal resistance at the end of the battery life, R new is the initial internal resistance of the battery just put into operation, and R is the internal resistance actually measured by the battery in the current state.
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| CN114236242A (en) * | 2021-11-23 | 2022-03-25 | 广西电网有限责任公司北海供电局 | Accumulator internal resistance tester and testing method based on composite frequency |
| CN114200330B (en) * | 2022-02-16 | 2022-05-03 | 广东电网有限责任公司中山供电局 | Method and device for detecting running condition of storage battery pack |
| CN116321240B (en) * | 2023-05-25 | 2023-12-01 | 武汉一龙技术有限公司 | Remote oil engine power generation monitoring system of communication base station |
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