CN108110338B - Constant power circulation mode of lead-acid storage battery for energy storage - Google Patents
Constant power circulation mode of lead-acid storage battery for energy storage Download PDFInfo
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- CN108110338B CN108110338B CN201711365786.7A CN201711365786A CN108110338B CN 108110338 B CN108110338 B CN 108110338B CN 201711365786 A CN201711365786 A CN 201711365786A CN 108110338 B CN108110338 B CN 108110338B
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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
- H01M10/44—Methods for charging or discharging
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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
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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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- 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 discloses a constant power circulation mode of a lead-acid storage battery for energy storage, which comprises a large circulation consisting of one hundred times of small circulation, one time of energy supplement and charging and one time of energy detection, and comprises the following specific steps: firstly, selecting a lead-acid storage battery for energy storage with full charge and qualified rated energy of 4hr under the condition of an ambient temperature of 25 ℃, continuously performing one hundred times of small cycles according to the condition that one-time charge and discharge is one small cycle, then performing one-time energy compensation charge, and finally performing one-time energy detection. And repeating the steps, when the energy of the lead-acid storage battery for energy storage is 4hr lower than 80% of rated energy, finishing the test when the energy is still lower than 80% after the test is confirmed again, recording the cycle number, and not counting the large cycle number in the last cycle. The watt-hour efficiency of the invention reaches 92%, and if the cycle life is calculated by 60% DOD depth, the cycle frequency is increased from 1800 times to 3000 times. The technical effect is that the watt-hour efficiency is improved, the cycle life is prolonged, and the electricity consumption cost is reduced for users.
Description
Technical Field
The invention relates to a constant power circulation mode of a lead-acid storage battery, in particular to a constant power circulation mode of a lead-acid storage battery for energy storage, and belongs to the technical field of lead-acid storage batteries.
Background
In order to reasonably adjust a production power utilization plan for the industrial and mining enterprises to reduce the peak load of a national power grid, stepped electricity price is implemented in China, and the purpose is to adjust the power utilization behavior of power consumers through economic levers. A densely distributed mobile communication base station belongs to a long-term power consumer, and a matched direct-current power supply system is composed of a switching power supply and a backup storage battery system. Under normal conditions, a switching power supply is introduced into a power supply of a national public power grid, and if the public power grid is occasionally powered off, a backup storage battery system is started to supply power. Because the public power grid in China has good and stable power supply quality, the alternating current supply of the communication base station is guaranteed. Nevertheless, there are occasional power outages. This situation illustrates that the backup battery system of the mobile communication base station is in an idle state for a long time in the base station, and only power is used during daily float charging. According to the relevant regulations of the national power grid, the alternating current used by the mobile communication base station belongs to industrial power utilization, and peak-valley flat pricing is carried out on the electricity price. Therefore, the power consumption time period of the mobile communication base station has the necessity of adjustment, and the floating charging in the national power grid peak period is avoided as much as possible so as to reduce the power consumption cost. Therefore, related enterprises in the industry carry out a great deal of research aiming at the situation, and the obtained result can be used for charging not according to a storage battery floating charge period circulation mode but according to a circulation mode of a national power grid peak-valley period, although the result has great technical progress and improves the watt-hour efficiency of a mobile communication base station, the watt-hour efficiency of the prior art is only about 84%, and the difference with the user requirement is large.
Disclosure of Invention
The invention mainly aims at the problem of low watt-hour efficiency in the prior art, and provides a constant power circulation mode of a lead-acid storage battery for energy storage, which is simple and convenient in method, reasonable in process, high in watt-hour efficiency and capable of greatly prolonging the circulation life of the storage battery.
The invention achieves the technical aim through the following technical scheme.
The improvement of the constant power circulation mode of the lead-acid storage battery for energy storage is that the constant power circulation mode comprises one hundred times of small circulation, one time of energy compensation charging and one time of energy detection to form a large circulation, and the specific steps are as follows:
A. firstly, selecting a lead-acid storage battery for energy storage, which is fully charged and qualified in 4hr rated energy, under the condition of an ambient temperature of 25 ℃;
B. one-time charging and discharging is a small cycle, and one hundred times of small cycles are continuously carried out;
C. then, primary energy compensation charging is carried out;
D. finally, performing primary energy detection;
E. and (6) repeating B, C, D, when the energy of the lead-acid storage battery for energy storage is 4hr lower than 80% of rated energy, ending the test when the test confirms that the energy is still lower than 80%, recording the cycle number, and not counting the large cycle number in the last cycle.
As a further improvement, the 4hr rated energy detection step in step A of the above technical scheme is as follows:
1. firstly, discharging to 1.9v/cell at rated power;
2. then charging to 2.4v/cell at rated power, and the whole process lasts for 4 h.
As a further improvement, the small-cycle implementation steps in step B of the technical scheme are as follows:
a. discharging for 4h at rated power;
b. then the charging is stopped immediately when the charging is carried out to 2.4v/cell at the rated power.
As a further improvement, the energy compensation charge in the technical scheme is that the energy compensation charge is charged to 2.4V/monomer for 4h at rated power.
Compared with the prior art, the invention has the following positive effects:
1. the peak clipping and valley filling constant power circulation mode can obviously save the electricity charge expenditure of the user, and is beneficial to the user and the country;
2. the floating charge period of the storage battery in the energy storage system is staggered with the peak period of a national power grid, and the strategy is scientific, advanced, reasonable and practical;
3. the energy-saving storage battery operates in a peak-clipping valley-filling constant-power circulation mode, the watt-hour efficiency of the energy-saving storage battery reaches 92 percent, is improved by about 8 percent compared with the prior art, and the circulation frequency of the storage battery reaches 3000 times, which is about 1200 times more than that of the prior art.
Drawings
FIG. 1 is a graph comparing the present invention and prior art cyclic patterns.
Detailed Description
The invention will be further elucidated on the basis of an embodiment shown in the drawing. The inventive examples and comparative examples were tested under the same test conditions using test equipment models of 12V500Ah, 6, 12V1000Ah, 6; the number of the lead-acid storage batteries for energy storage to be tested is 12, and the model is LLC-500Ah, wherein 6 batteries are used in the embodiment, and the other 6 batteries are used in the comparative example.
The invention relates to a constant power circulation mode of a lead-acid storage battery for energy storage, which comprises a large circulation consisting of one hundred times of small circulation, one time of energy supplement charging and one time of energy detection, and comprises the following specific steps:
A. firstly, selecting a lead-acid storage battery for energy storage, which is fully charged and qualified in 4hr rated energy, under the condition of an ambient temperature of 25 ℃;
B. one-time charging and discharging is a small cycle, and one hundred times of small cycles are continuously carried out;
C. then, primary energy compensation charging is carried out;
D. finally, performing primary energy detection;
E. b, C, D is repeated, when the energy of the accumulator is lower than 80% of the rated energy for 4hr, the test is finished when the energy is still lower than 80%, the cycle number is recorded, and the last cycle does not count the large cycle number.
Example (b):
1. in this embodiment, energy detection is performed on a lead-acid storage battery for energy storage for 4hr, and a rated power of 125W is firstly performed, a discharge time is 4h, and a cut-off voltage is 1.9v/cell, if the energy detection is qualified when the discharge time is longer than 4h, the lead-acid storage battery is immediately charged to 2.4v/cell by the rated power of 125W after the discharge is finished, and the lead-acid storage battery is stopped after the discharge is continued for 4h, and then the lead-acid storage battery enters a peak clipping and valley filling.
2. In the embodiment, 6 lead-acid storage batteries for energy storage are subjected to small circulation, and the lead-acid storage batteries are discharged for 4 hours at a rated power of 750W, wherein the rated power of each lead-acid storage battery for energy storage is 125W; and charging to 2.4v/cell at the rated power of 125W, wherein the charging time is less than or equal to 4.5 h.
3. Repeating the discharging and charging steps for one hundred times, and after the circulation for one hundred times is finished, charging to 2.4v at constant power of 750W, wherein the whole process is kept for 4 h.
4. The energy of the energy storage lead-acid battery of the embodiment is detected for 4 hr.
5. And (3) repeating the steps 1-4, recording the cycle times when the energy of the lead-acid storage battery for energy storage is lower than 80% of the rated energy of 4hr, finishing the test when the test confirms that the energy is still lower than 80%, and counting the large cycle times in the last cycle.
Comparative example
The discharge depth of a lead-acid storage battery used for energy storage in the prior art is circulated between 40% and 100%, and the method comprises the following specific steps:
1. firstly, performing 4hr energy detection on a lead-acid storage battery for energy storage, and entering a circulation mode after the detection is qualified;
2. the rated power of each lead-acid storage battery for energy storage is 250W, and the total number of the lead-acid storage batteries is 6, and the lead-acid storage batteries are discharged for 4 hours at the constant power of 1500W;
3. standing for 5 h;
4. after the battery is charged to the cut-off voltage of 2.4v/cell at the rated power of 250W, keeping for 4 h;
5. repeating the steps 2 and 4 for one hundred times, charging to 2.35V at constant power, and keeping the whole process for 6 h;
6. and repeating the steps 1-5, recording the cycle times when the energy of the lead-acid storage battery for energy storage is lower than 80% of rated energy of 4hr, finishing the test when the test confirms that the energy is still lower than 80%, and counting the large cycle times in the last cycle.
The test results of the examples and the comparative examples are shown in FIG. 1, and the curve in the figure shows that the watt-hour efficiency of the examples reaches 92% and is improved by 8% compared with the comparative example. The cycle life, if calculated at 60% DOD depth, increases from 1800 to 3000 cycles. The technical effect is that the watt-hour efficiency of the embodiment is improved, the cycle life is prolonged, and the electricity consumption cost is reduced for users.
Claims (1)
1. The constant power circulation mode of the lead-acid storage battery for energy storage is characterized in that: the constant power circulation mode comprises a large circulation consisting of one hundred times of small circulation, one time of energy compensation and one time of energy detection, and comprises the following specific steps:
A. firstly, selecting a lead-acid storage battery for energy storage, which is fully charged and qualified in 4hr rated energy, under the condition of an ambient temperature of 25 ℃; discharging at rated power, stopping until the voltage is 1.9v/cell, if the energy detection is qualified when the discharge time is more than 4h, immediately charging to 2.4v/cell at rated power after the discharge is finished, and stopping after the discharge lasts for 4 h;
B. one-time charging and discharging according to rated power is a small cycle, and one hundred times of small cycles are continuously carried out;
C. then, performing primary energy compensation charging, wherein the energy compensation charging is performed to 2.4V/cell at rated power, and the whole process lasts for 4 hours;
D. finally, performing primary energy detection;
E. repeating B, C, D, when the energy of the lead-acid storage battery for energy storage is lower than 80% of the rated energy for 4hr, testing again to confirm that the energy is still lower than 80%, ending the test, recording the cycle number, and not counting the large cycle number in the last cycle;
the small cycle implementation steps in the step B are as follows:
a. discharging for 4h at rated power;
b. then the charging is stopped immediately when the charging is carried out to 2.4v/cell at the rated power.
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| CN110797598B (en) * | 2019-09-26 | 2022-07-26 | 双登集团股份有限公司 | Charge-discharge control method for lead-carbon energy storage battery for power frequency modulation |
| CN111190114B (en) * | 2019-12-17 | 2022-03-04 | 上海电气国轩新能源科技有限公司 | Accelerated testing method for long-cycle lithium iron phosphate battery for energy storage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1783572A (en) * | 2004-11-29 | 2006-06-07 | 江苏双登电源有限公司 | Charging mode of lead-acid accumulator for electric bicycle |
| CN102122826A (en) * | 2011-01-17 | 2011-07-13 | 中国南方电网有限责任公司电网技术研究中心 | Energy storage bidirectional current converter for high-capacity storage battery |
| CN106410304A (en) * | 2016-11-16 | 2017-02-15 | 双登集团股份有限公司 | Insufficient charging cycle system suitable for matching with lead-carbon battery in energy accumulation scene |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1783572A (en) * | 2004-11-29 | 2006-06-07 | 江苏双登电源有限公司 | Charging mode of lead-acid accumulator for electric bicycle |
| CN102122826A (en) * | 2011-01-17 | 2011-07-13 | 中国南方电网有限责任公司电网技术研究中心 | Energy storage bidirectional current converter for high-capacity storage battery |
| CN106410304A (en) * | 2016-11-16 | 2017-02-15 | 双登集团股份有限公司 | Insufficient charging cycle system suitable for matching with lead-carbon battery in energy accumulation scene |
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