CN117154266A - Online repairing method and system for lead-acid storage battery of transformer substation - Google Patents
Online repairing method and system for lead-acid storage battery of transformer substation Download PDFInfo
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Classifications
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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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
-
- 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
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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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- Manufacturing & Machinery (AREA)
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- Secondary Cells (AREA)
Abstract
The embodiment of the invention provides a method and a system for on-line repair of a lead-acid storage battery of a transformer substation, wherein the method comprises the following steps: identifying a degraded battery in the lead-acid battery pack by using a battery on-line monitoring device; adding a pre-prepared organic high polymer additive into the degradation storage battery to repair the degradation storage battery; and testing the capacity change condition before and after the repairing of the deteriorated storage battery by using the storage battery online capacity checking device, and verifying the online repairing effect of the lead-acid storage battery. According to the invention, the lead-acid storage battery of the transformer substation is monitored on line to identify the degraded storage battery, and the degraded lead-acid storage battery is repaired by the organic high polymer additive, so that the damage of the aged storage battery to the environment is reduced, and the utilization rate of the existing battery resources is improved. The online repairing effect of the lead-acid storage battery is verified by testing the capacity change condition before and after the repairing of the deteriorated storage battery, the reliability and stability of the lead-acid storage battery of the transformer substation are further improved, and the safe operation of a power grid is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of storage batteries, in particular to an online repairing method and system for a lead-acid storage battery of a transformer substation.
Background
At present, with the rapid development of basic industries such as automobile industry, 5G communication, electric power, traffic, railway, computer and the like, the demand of the market for storage batteries is growing day by day, and the rapid development of the storage battery industry is greatly promoted. The lead-acid storage battery occupies a higher market share in the field of batteries due to the advantages of safety, stability, high cost performance and the like, and is widely applied to the fields of automobile starting, communication, power batteries, energy storage batteries and the like. According to the Zhongzhenpu Hua analysis, the lead-acid storage battery still keeps a certain increase range under the double drive of continuous upgrading of industry and expansion of downstream demand, and the lead-acid storage battery still is the main stream of the battery market in the future 20 years. Although the lead in the lead-acid storage battery can be recycled, so that the industry chain of the lead-acid storage battery realizes a certain degree of resource circulation, the technical short plates in the field of repairing the lead-acid storage battery are still obvious. According to statistics, the lead-acid storage batteries which are eliminated each year are widely distributed in the fields of electric power, communication, finance, aviation, automobiles, railway transportation and the like; at least 5000 tens of thousands of lead-acid storage batteries can be repaired and regenerated, and about 70% of the eliminated lead-acid storage batteries can be repaired and reused in the power industry due to more strict requirements on safety guarantee. However, most of the eliminated batteries are not effectively utilized due to the limitation of the lead-acid storage battery repairing technology, so that the resource waste is caused, and the secondary pollution of the environment is also caused.
In practical application, the cycle life of the lead-acid storage battery has a great relation with the use environment of the lead-acid storage battery, and particularly the discharge depth in the storage battery cycle process has great influence on the cycle life of the storage battery. In general, the service life of a secondary battery used in a deep cycle is 2 to 3 years, and the service life of a secondary battery used in a floating state can reach 5 to 8 years. However, in practical application, due to improper use and maintenance of the battery, the service life of the battery is relatively short, for example, the practical service life of the valve-regulated lead-acid battery for a transformer substation is 3-6 years, and the occurrence of the situation is a huge waste of resources.
Meanwhile, the management strategy of the power grid on the storage battery also enables maintenance staff of the storage battery to face huge pressure: when the discharge capacity of the storage battery is lower than 80% of the rated capacity, the operation and maintenance personnel identify that the storage battery has failed; secondly, the storage battery does not reach the design life, and a new storage battery cannot be replaced easily; thirdly, even if a new storage battery is allowed to be replaced, the whole approval process is quite long, and the storage battery is enabled to work with diseases during approval, so that the safety of a direct current system is seriously influenced, and the reliable operation of a power grid is also influenced.
The direct current power supply provided by the lead-acid storage battery pack of the transformer substation provides a device power supply and an operation power supply for main equipment such as a comprehensive automation device. In a direct current system, a lead-acid battery pack of a transformer substation plays an extremely important and indispensable role. The direct current load is powered by the direct current charging device and carries out floating charging on the lead-acid storage battery pack of the transformer substation, and the lead-acid storage battery pack of the transformer substation is in a floating charging standby state. When ac is lost, the dc charging device fails or an accident situation, the substation lead-acid battery pack must provide power to all loads. The transformer substation lead-acid storage battery belongs to standby equipment in the power system, but in an accident state, the transformer substation lead-acid storage battery is the only power supplier of the load. Therefore, once the lead-acid storage battery pack of the transformer substation fails, the power system is paralyzed or even has serious accidents, and huge losses are caused. In general, the power department adopts a method of periodically replacing the storage battery to solve the problem of battery failure, but the replacement of the storage battery not only causes the increase of operation and maintenance cost of the power department, but also causes secondary pollution of environment easily caused by lead-containing substances and sulfuric acid solution in the lead-acid storage battery in the treatment process.
At present, a plurality of universities in China are added into research lines of lead-acid storage battery repair technology. For example, a university has devised a repair system that eliminates polarization and sulfidation of a lead acid battery based on the charge-discharge characteristics of the lead acid battery. And repairing the lead-acid storage battery by adopting a fixed pulse resonance mode at a certain university. The research of universities is to explore the relationship between the characteristics of a lead electrode and a lead-acid storage battery in electrochemical reaction by electrochemical characteristics in electrolyte, and to eliminate the vulcanization of the lead-acid storage battery in a chemical mode.
Advanced countries have earlier studied lead acid battery repair technology and have accumulated a great deal of experience. For example, university of Edwards in the United states solves the problem of delamination of sulfuric acid electrolyte from lead acid batteries and loss of active material from the plates. The university of Tianzhu in the united states utilizes a microcontroller to output PWM Xin Halai to control a switch circuit, and positive and negative pulses are generated to repair the lead-acid storage battery. The special high-power lead-acid storage battery repairing equipment is developed by Japanese company, is large in size, can detect and analyze the change condition of the voltage difference and the internal resistance of the lead-acid storage battery simultaneously by sending continuous scanning pulses with adjustable frequency, duty ratio and amplitude to the internal polar plate of the lead-acid storage battery, and can recover the capacity of the lead-acid storage battery to 80% -90% by adopting the repairing technology. In addition, some developing countries have conducted related art research and have achieved some results.
The lead-acid storage battery repairing technology is a practical technology developed in recent years, and the lead-acid storage battery repairing technology is subjected to repairing treatment, so that resources are recycled, the damage to the environment is reduced, and the lead-acid storage battery repairing technology is a new technology which is energy-saving and environment-friendly, and is an important embodiment for building an environment-friendly society, and therefore, the lead-acid storage battery repairing technology is more and more concerned.
At present, the main repairing methods of lead-acid batteries are divided into two major types of chemical repairing and physical repairing.
(1) Chemical repair is mainly hydrotherapy.
The water treatment is carried out by injecting electrolyte with low concentration (generally 1.1g/cm 2 The following) so as to improve the solubility of the lead sulfate, and then carrying out low-current constant-current charging on the storage battery, wherein the current is generally controlled below I20, thereby achieving the purpose of repairing the storage battery. However, the method is only suitable for the lead-acid storage battery which just generates the vulcanization phenomenon, and the operation steps are long and complicated, which is unfavorable for large-scale application, and the method is rarely applied at present.
(2) The physical repair method mainly comprises a strong current repair method, a pulse repair method and a high-frequency resonance repair method.
The strong-current repairing method is to inject a large current (the current density is more than 100mA/cm < 2 >) into the lead-acid storage battery to make the electrode and the electrolyte undergo a strong chemical reaction, change the potential of the electrode and make the vulcanized active substance on the surface of the electrode fall off, thereby achieving the purpose of repairing the storage battery. The method is also only suitable for lead-acid storage batteries with low vulcanization degree, and the lead-acid storage batteries can generate a large amount of heat in the repair process due to the large current, so that irreversible damage such as swelling of the storage batteries can occur, and the method is not used at present basically.
The pulse repairing method is to add negative pulse in the charging process, the negative pulse can effectively inhibit the temperature rise of the storage battery in the charging process and lighten polarization, but the method has little effect on vulcanization and is mostly used together with other repairing methods.
The high-frequency resonance repairing method utilizes the mechanism that all objects have a resonance frequency, and generates high-frequency resonance current through a high-frequency switch to resonate with the vulcanized lead sulfate crystal, thereby achieving the effect of breaking the lead sulfate crystal and recovering the capacity of the storage battery. However, the resonance frequencies of lead sulfate crystals with different degrees of sulfidation are different, so that the method has limited effect on the ablation of the lead sulfate crystals.
Therefore, the present lead-acid battery has the above limitations in both chemical and physical repair methods, and thus, a more effective and durable repair method that does not damage the battery is sought, which is a highly desirable problem.
Disclosure of Invention
The embodiment of the invention provides a method and a system for online repairing of a lead-acid storage battery of a transformer substation, which are used for online identifying and repairing the deteriorated lead-acid storage battery, reducing the damage of the aged storage battery to the environment and improving the utilization rate of the existing resources.
In a first aspect, an embodiment of the present invention provides an online repair method for a lead-acid storage battery of a transformer substation, including:
identifying a degraded battery in the lead-acid battery pack by using a battery on-line monitoring device;
adding an organic high polymer additive into the deteriorated storage battery to repair the deteriorated storage battery;
and testing the capacity change condition before and after the repairing of the deteriorated storage battery by using the storage battery online capacity checking device, and verifying the online repairing effect of the lead-acid storage battery.
Further, before adding the organic high molecular polymer additive to the deteriorated storage battery, the method further includes:
analyzing the degradation reason of the lead-acid storage battery of the transformer substation, and determining the mechanism of optimizing the performance of the degradation storage battery by the organic high polymer additive by combining the characteristics of the organic high polymer;
preparing the organic high molecular polymer additive for the lead-acid storage battery.
Further, the analysis of the degradation cause of the lead-acid storage battery of the transformer substation includes:
analyzing the cause of lead sulfate crystallization of the negative electrode of the lead-acid storage battery of the transformer substation and the influence on the lead-acid storage battery, and obtaining the degradation cause of the lead-acid storage battery of the transformer substation comprises the following steps: the negative electrode of the lead-acid storage battery of the transformer substation is attached with a lead sulfate crystal, so that the internal resistance of the lead-acid storage battery is increased;
the lead-acid storage battery of the transformer substation loses water for a long time to increase the concentration of sulfuric acid, so that lead sulfate crystallization is aggravated, and the battery capacity is reduced.
Further, the combination of the characteristics of the organic polymer determines that the organic polymer additive optimizes the performance of the deteriorated storage battery by a mechanism of eliminating bad crystallization, a mechanism of evenly distributing benign crystallization and a mechanism of delaying physical deterioration of the polar plate, wherein,
mechanism of elimination of poor crystallization: hydroxyl, carboxyl and amino which are rich in biomacromolecules in the organic high molecular polymer additive form a coordination compound with lead ions dissociated in battery liquid by lead sulfate crystals, so that the lead sulfate is accelerated to be dissolved when a lead-acid storage battery is charged, and the lead sulfate crystals are eliminated;
benign crystallization homogeneous distribution mechanism: because the biomacromolecules in the organic high molecular polymer additive are uniformly distributed in the battery liquid, based on the characteristics of long-chain polyhydroxy of the biomacromolecules, lead sulfate new crystals are guided to be uniformly attached to the lead-acid storage battery plate, and the uniformly attached lead sulfate crystals on the lead-acid storage battery plate are rapidly dissolved when being charged, so that the capacity of the storage battery is improved;
delay physical degradation mechanism of the polar plate: the macromolecules contained in the organic high molecular polymer additive and dissociated lead ions in the battery solution form coordination compounds; the coordination compound can guide lead ions to return to the polar plate to be reduced into lead under the action of an electric field in the charging process, thereby reducing lead sulfate precipitation, recovering the capacity of the storage battery and prolonging the aging time of the polar plate.
Further, the organic high polymer additive is formed by mixing hydroxybutyric acid, carboxylic acid, acetic acid, N-acetylgluconic acid, lunasin peptide, ST peptide, beta-hydroxy-alpha-aminobutyric acid, L-2-amino-3-hydroxypropionic acid, distilled water and sulfuric acid.
Further, the substation lead-acid storage battery is a valve-regulated lead-acid storage battery.
Further, adding an organic high molecular polymer additive to the deteriorated storage battery includes:
and adding an organic high molecular polymer additive into the deteriorated storage battery through a safety air valve hole at the top end of the valve-controlled lead-acid storage battery.
In a second aspect, an embodiment of the present invention provides an online repair system for a lead-acid storage battery of a transformer substation, including:
the storage battery on-line monitoring device is used for identifying a degraded storage battery in the lead-acid storage battery pack;
the storage battery online repairing device is used for adding an organic high polymer additive into the deteriorated storage battery to repair the deteriorated storage battery;
the online capacity checking device of the storage battery is used for testing capacity change conditions before and after the repairing of the deteriorated storage battery and verifying the online repairing effect of the lead-acid storage battery.
According to the online repairing method and system for the lead-acid storage battery of the transformer substation, provided by the embodiment of the invention, the lead-acid storage battery of the transformer substation is monitored on line to identify the degraded storage battery, and the degraded lead-acid storage battery is repaired by the organic high polymer additive, so that the damage of the aged storage battery to the environment is reduced, and the utilization rate of the existing battery resources is improved. According to the method, the online repairing effect of the lead-acid storage battery is verified by testing the capacity change condition before and after the repairing of the deteriorated storage battery, the reliability and stability of the lead-acid storage battery of the transformer substation are further improved, and the safe operation of a power grid is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an online repair method for a lead-acid storage battery of a transformer substation, which is provided by an embodiment of the invention;
fig. 2 is a structural block diagram of an online repair system for a lead-acid storage battery of a transformer substation, which is provided by an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, the main repairing methods of lead-acid batteries are divided into two major types of chemical repairing and physical repairing. Chemical repair is mainly hydrotherapy. The method is only suitable for the lead-acid storage battery which just generates the sulfuration phenomenon, has long and complicated operation steps, is unfavorable for large-scale application, and is rarely applied at present. The physical repair method mainly comprises a strong current repair method, a pulse repair method and a high-frequency resonance repair method. However, the high-voltage repair method may cause irreversible damage such as swelling of the battery. The pulse repairing method is to add negative pulse in the charging process, the negative pulse can effectively inhibit the temperature rise of the storage battery in the charging process and lighten polarization, but the method has little effect on vulcanization and is mostly used together with other repairing methods. The high-frequency resonance repair method has limited effect on lead sulfate crystal ablation.
Therefore, aiming at the main defects of the existing lead-acid storage battery repairing method, in order to ensure the use safety of the lead-acid storage battery of the transformer substation, the embodiment of the invention provides the online repairing method and system for the lead-acid storage battery of the transformer substation, which are used for identifying and repairing the degraded lead-acid storage battery on line, the damage of the aged storage battery to the environment is reduced, and the utilization rate of the existing resources is improved. The following description and description will be made with reference to the drawings by way of various embodiments.
Fig. 1 is a flowchart of a method for online repairing a lead-acid storage battery of a transformer substation, according to an embodiment of the present invention, and referring to fig. 1, the method includes:
step 101, identifying a degraded battery in a lead-acid battery pack by using a battery on-line monitoring device;
the storage battery on-line monitoring device can measure the monomer voltage and the monomer internal resistance of each single storage battery in the lead-acid storage battery pack, and accurately judges the deteriorated storage battery in the lead-acid storage battery pack through on-line test of the internal resistance of the single storage battery.
And 102, adding a pre-prepared organic high polymer additive into the degraded storage battery to repair the degraded storage battery.
The invention prepares the organic high polymer additive acting on the lead sulfate crystal in the degradation storage battery in advance by researching the mechanism of the organic high polymer to prevent the formation of the bad lead sulfate crystal in the lead-acid storage battery. Preferably, the substation lead-acid storage battery is a valve-regulated lead-acid storage battery. In the embodiment, the organic high polymer additive is added to the degraded storage battery through the safety air valve hole at the top end of the valve-controlled lead-acid storage battery, so that the degraded storage battery is repaired.
And step 103, testing the capacity change condition before and after the repairing of the deteriorated storage battery by using the storage battery online capacity checking device, and verifying the online repairing effect of the lead-acid storage battery.
In this embodiment, the battery capacity before and after the repair of the degraded battery is checked by using the online capacity checking device of the battery, so that it can be checked whether the degraded battery meets the battery capacity requirement after the repair in step 102. After the deteriorated storage battery is repaired and checked by the online capacity checking device of the storage battery, the deteriorated storage battery can be put into the transformer substation, so that the reliability and stability of the lead-acid storage battery of the transformer substation are improved, and the safe operation of a power grid is further ensured.
According to the online repairing method for the transformer substation lead-acid storage battery, provided by the embodiment of the invention, the transformer substation lead-acid storage battery is monitored online to identify the degraded storage battery, and the degraded lead-acid storage battery is repaired through the organic high polymer additive, so that the damage of the aged storage battery to the environment is reduced, and the utilization rate of the existing battery resources is improved. According to the method, the online repairing effect of the lead-acid storage battery is verified by testing the capacity change condition before and after the repairing of the deteriorated storage battery, the reliability and stability of the lead-acid storage battery of the transformer substation are further improved, and the safe operation of a power grid is ensured.
On the basis of the above embodiment, before the organic high polymer additive is added to the degraded battery in step 102, the online repair method for the lead-acid storage battery of the transformer substation further includes:
analyzing the degradation reason of the lead-acid storage battery of the transformer substation, and determining the mechanism of optimizing the performance of the degradation storage battery by the organic high polymer additive by combining the characteristics of the organic high polymer; preparing the organic high molecular polymer additive for the lead-acid storage battery.
As the types of plates, production processes and use environments of different types of lead-acid batteries are different, the failure modes of the lead-acid batteries are different, and the most common failure modes are: and the positive grid of the storage battery is corroded and deformed, irreversibly sulfated, softened and fallen active substances on the positive grid, thermally uncontrolled, dehydrated, shorted, broken and the like. It should be noted that not all the failed batteries caused by different reasons can be repaired, and only the failed batteries caused by water loss and vulcanization can be repaired. The method analyzes the cause of lead sulfate crystallization of the negative electrode of the lead-acid storage battery of the transformer substation and the influence on the lead-acid storage battery, and analyzes and learns the degradation cause of the lead-acid storage battery including sulfuration and water loss. Specifically, the causes of the failure of the lead-acid storage battery of the transformer substation mainly include: 1) The lead-acid storage battery of the transformer substation is in an incompletely charged or idle environment for a long time, and a lead sulfate crystal is attached to the negative electrode of the lead-acid storage battery of the transformer substation, which is called sulfuration for short, so that the internal resistance of the lead-acid storage battery is increased or even fails; 2) The long-term dehydration of the lead-acid storage battery of the transformer substation can increase the concentration of sulfuric acid, exacerbate the crystallization of lead sulfate, thereby reducing the capacity of the battery and shortening the replacement period of the battery.
Furthermore, the invention determines the mechanism of optimizing the performance of the degradation storage battery by the organic high polymer additive through the lead-acid storage battery structure and the condition analysis generated by the bad lead sulfate crystallization and combining the characteristics of the organic high polymer.
The positive electrode active material of the lead-acid storage battery is lead dioxide, the negative electrode active material is sponge lead, the electrolyte is dilute sulfuric acid, and the electrode reaction equation can be expressed as follows:
positive electrode reaction: pbSO 4 +2H 2 O＝PbO 2 +HSO 4 - +3H + +2e
Negative electrode reaction: pbSO 4 +H + +2e＝Pb+HSO 4 -
Total reaction: 2PbSO 4 +2H 2 O＝Pb+PbO 2 +H 2 SO 4
As can be seen from the total reaction formula of the electrodes, when the normal lead-acid storage battery is discharged, active substance lead dioxide of the positive electrode and active substance metal lead of the negative electrode are reacted with sulfuric acid electrolyte to generate PbSO4, and the reaction is called as 'disulfated reaction' in electrochemistry, and when the battery works, the PbSO4 and the metal lead can realize reversible conversion. However, after a large part of lead-acid storage batteries run for a certain time, a layer of hard white PbSO is produced on the positive and negative plates 4 Crystals of PbSO 4 The crystal is difficult to be converted into metallic lead during charging, and the layer of PbSO4 is continuously formedRecrystallization and grain growth usually occur in the negative electrode, which is called irreversible sulfation, abbreviated as sulfidation. Coarse PbSO due to sulfidation 4 The conductivity of the crystal is low, so that the internal impedance of the battery is increased, the voltage is rapidly increased during charging, and the voltage is rapidly reduced during discharging; irreversible PbSO 4 The crystal does not participate in the reaction, and electrode active substances are directly reduced, so that the capacity of the storage battery is reduced, and the service life of the storage battery is shortened.
It is thus seen that there is a need for preparing an organic macromolecule that eliminates lead sulfate crystallization in lead acid batteries during battery operation. The biological macromolecules belong to natural macromolecular compounds in organic macromolecules, active functional groups such as hydroxyl, carboxyl and the like in some biological macromolecules can be adsorbed on the surface of sponge lead, the surface area of an electrode is increased, passivation of a lead electrode is prevented, and meanwhile, lead sulfate is prevented from forming large crystals, so that lead ions can be effectively reduced into active substances on a polar plate in the charging process.
According to the production conditions of lead sulfate crystals during the working of the lead-acid storage battery and in combination with the characteristics of biomacromolecules in the organic macromolecules, the invention researches and determines the mechanism of the organic macromolecule polymer additive for optimizing the performance of the deteriorated storage battery. The mechanism of optimizing the performance of the degradation storage battery by the organic high molecular polymer additive studied by the invention comprises (1) a poor crystallization elimination mechanism, (2) a benign crystallization uniform distribution mechanism and (3) a physical degradation mechanism of a delay polar plate, wherein,
(1) Mechanism of elimination of poor crystallization: the lead sulfate crystals are ionic poorly soluble crystals. The hydroxyl, carboxyl and amino groups rich in biomacromolecules in the organic high molecular polymer additive form coordination compounds with lead ions dissociated in the battery solution by lead sulfate crystals, so that the dissolution-crystallization reaction of the lead sulfate in the battery solution is more prone to dissolution reaction, namely the lead sulfate is accelerated to dissolve when the lead-acid storage battery is charged, and the lead sulfate crystals are eliminated.
(2) Benign crystallization homogeneous distribution mechanism: because the biomacromolecules in the organic high molecular polymer additive are uniformly distributed in the battery liquid, the novel lead sulfate crystals are guided to uniformly adhere to the lead-acid storage battery plate based on the characteristics of long-chain polyhydroxy of the biomacromolecules, and the probability of falling off and precipitation of fine crystals is reduced. The lead sulfate crystals uniformly attached to the lead-acid storage battery electrode plates are tiny and loose, and can be rapidly dissolved in charging, so that the capacity of the lead-acid storage battery is improved.
(3) Delay physical degradation mechanism of the polar plate: in the charge and discharge process of the storage battery, the oversized lead sulfate crystals cannot be thoroughly dissolved, and are very easy to fall off from the polar plate, so that the polar plate is physically damaged. The macromolecules contained in the organic high molecular polymer additive and dissociated lead ions in the battery solution form coordination compounds; the coordination compound can guide lead ions to return to the polar plate to be reduced into lead under the action of an electric field in the charging process, thereby reducing lead sulfate precipitation, gradually recovering the capacity of the storage battery and prolonging the aging time of the polar plate.
On the basis of the embodiment, the invention prepares the organic high molecular polymer additive acting on lead sulfate crystals by researching the mechanism of the organic high molecular polymer for blocking the formation of poor lead sulfate crystals in the lead-acid storage battery. The organic high polymer additive can be formed by mixing hydroxybutyric acid, carboxylic acid, acetic acid, N-acetylgluconic acid, lunasin peptide, ST peptide, beta-hydroxy-alpha-aminobutyric acid, L-2-amino-3-hydroxypropionic acid, distilled water and sulfuric acid.
Fig. 2 is a structural block diagram of an online repair system for a lead-acid storage battery of a transformer substation, provided by an embodiment of the invention, referring to fig. 2, the online repair system for the lead-acid storage battery of the transformer substation includes:
a battery on-line monitoring device 201 that identifies a degraded battery in a lead-acid battery pack;
an on-line repairing device 202 for repairing the deteriorated storage battery by adding an organic polymer additive to the deteriorated storage battery;
the online capacity checking device 203 of the storage battery is used for testing capacity change conditions before and after the repair of the degraded storage battery and verifying the online repair effect of the lead-acid storage battery.
The invention combines with the organic high polymer additive to construct the lead-acid storage battery online repairing system which comprises the integration of storage battery online monitoring, storage battery online repairing and storage battery online nuclear capacity, and the degraded lead-acid storage battery is identified and repaired online, so that the damage of the aged storage battery to the environment is reduced, and the utilization rate of the existing resources is improved. The online repairing effect of the lead-acid storage battery is verified by testing the capacity change condition before and after the repairing of the deteriorated storage battery, the reliability and stability of the lead-acid storage battery of the transformer substation are further improved, and the safe operation of a power grid is ensured
It can be appreciated that the online repair system for the lead-acid storage battery of the transformer substation provided by the embodiment of the present invention executes the online repair method for the lead-acid storage battery of the transformer substation in the above embodiment through the online monitoring device 201 for the storage battery, the online repair device 202 for the storage battery and the online capacity device 203 for the storage battery, and the flow of the online repair method for the lead-acid storage battery of the transformer substation has been described in detail in the above method embodiment, which is not described herein in detail.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The online repairing method for the lead-acid storage battery of the transformer substation is characterized by comprising the following steps of:
identifying a degraded battery in the lead-acid battery pack by using a battery on-line monitoring device;
adding a pre-prepared organic high polymer additive into the degradation storage battery to repair the degradation storage battery;
and testing the capacity change condition before and after the repairing of the deteriorated storage battery by using the storage battery online capacity checking device, and verifying the online repairing effect of the lead-acid storage battery.
2. The method for on-line repair of a lead-acid battery of a substation of claim 1, wherein prior to adding the organic high molecular polymer additive to the degraded battery, the method further comprises:
analyzing the degradation reason of the lead-acid storage battery of the transformer substation, and determining the mechanism of optimizing the performance of the degradation storage battery by the organic high polymer additive by combining the characteristics of the organic high polymer;
preparing the organic high molecular polymer additive for the lead-acid storage battery.
3. The online repair method of the lead-acid storage battery of the transformer substation according to claim 2, wherein the analyzing the degradation cause of the lead-acid storage battery of the transformer substation comprises:
analyzing the cause of lead sulfate crystallization of the negative electrode of the lead-acid storage battery of the transformer substation and the influence on the lead-acid storage battery, and obtaining the degradation cause of the lead-acid storage battery of the transformer substation comprises the following steps: the negative electrode of the lead-acid storage battery of the transformer substation is attached with a lead sulfate crystal, so that the internal resistance of the lead-acid storage battery is increased;
the lead-acid storage battery of the transformer substation loses water for a long time to increase the concentration of sulfuric acid, so that lead sulfate crystallization is aggravated, and the battery capacity is reduced.
4. The online repair method for the lead-acid storage battery of the transformer substation according to claim 2, wherein the mechanism for determining the optimization of the performance of the degraded storage battery by the organic high polymer additive comprises a poor crystallization elimination mechanism, a benign crystallization uniform distribution mechanism and a delayed polar plate physical degradation mechanism by combining the characteristics of the organic high polymer,
mechanism of elimination of poor crystallization: hydroxyl, carboxyl and amino which are rich in biomacromolecules in the organic high molecular polymer additive form a coordination compound with lead ions dissociated in battery liquid by lead sulfate crystals, so that the lead sulfate is accelerated to be dissolved when a lead-acid storage battery is charged, and the lead sulfate crystals are eliminated;
benign crystallization homogeneous distribution mechanism: because the biomacromolecules in the organic high molecular polymer additive are uniformly distributed in the battery liquid, based on the characteristics of long-chain polyhydroxy of the biomacromolecules, lead sulfate new crystals are guided to be uniformly attached to the lead-acid storage battery plate, and the uniformly attached lead sulfate crystals on the lead-acid storage battery plate are rapidly dissolved when being charged, so that the capacity of the storage battery is improved;
delay physical degradation mechanism of the polar plate: the macromolecules contained in the organic high molecular polymer additive and dissociated lead ions in the battery solution form coordination compounds; the coordination compound can guide lead ions to return to the polar plate to be reduced into lead under the action of an electric field in the charging process, thereby reducing lead sulfate precipitation, recovering the capacity of the storage battery and prolonging the aging time of the polar plate.
5. The online repair method of the lead-acid storage battery of the transformer substation according to claim 1, wherein the organic high polymer additive is formed by mixing hydroxybutyric acid, carboxylic acid, acetic acid, N-acetylgluconic acid, lunasin peptide, ST peptide, beta-hydroxy-alpha-aminobutyric acid, L-2-amino-3-hydroxypropionic acid, distilled water and sulfuric acid.
6. The method for on-line repair of a substation lead-acid battery according to claim 1, wherein the substation lead-acid battery is a valve-regulated lead-acid battery.
7. The method for on-line repair of a lead-acid storage battery of a transformer substation according to claim 6, wherein an organic high molecular polymer additive is added to the deteriorated storage battery, comprising:
and adding an organic high molecular polymer additive into the deteriorated storage battery through a safety air valve hole at the top end of the valve-controlled lead-acid storage battery.
8. An online repair system for a lead-acid storage battery of a transformer substation, comprising:
the storage battery on-line monitoring device is used for identifying a degraded storage battery in the lead-acid storage battery pack;
the storage battery online repairing device is used for adding a pre-prepared organic high polymer additive into the deteriorated storage battery to repair the deteriorated storage battery;
the online capacity checking device of the storage battery is used for testing capacity change conditions before and after the repairing of the deteriorated storage battery and verifying the online repairing effect of the lead-acid storage battery.
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