58 results about "Lead sulfate" patented technology

[Problem] An object is to provide a lead sulfate coating removal device that has low power consumption and does not damage an electrode of a lead-acid battery.[Solution]A lead sulfate coating removal device implemented by an application specific integrated circuit (ASIC) that removes a lead sulfate coating generated on an electrode of a lead-acid battery includes: a generation unit that generates, on the basis of a signal extracted from the lead-acid battery, a removal signal of the lead sulfate coating having a peak value of 550 mA to 1000 mA, a pulse width of 5 nsec to 100 nsec, and a frequency of 5 kHz to 50 kHz; and a supply unit that supplies the removal signal generated by the generation unit to the electrode of the lead-acid battery.

The present invention provides a lead-acid battery repair fluid, and its preparation and use methods. The repair fluid comprises the following raw materials: MXene, ammonium acetate, ammonium bicarbonate, sodium ethylenediaminetetraacetate (EDTA), montmorillonite, polymaleic anhydride, sodium polystyrene sulfonate, chloroethyl polyvinylpyridinium salt, polyvinylpyrrolidone (PVP), sodium alginate, and deionized water. The repair fluid can effectively dissolve lead sulfate crystals and form a durable and stable protective film on the electrode plates, thereby regenerating the lead-acid battery while effectively preventing further lead sulfate crystals from adhering to the electrode plates, thereby increasing the battery's service life. Furthermore, the raw materials used in the present invention are safe and harmless to the human body, and the preparation method is simple, efficient, and environmentally friendly.

The invention belongs to the technical field of metal resource recovery and reutilization, and particularly relates to a selective recovery method for valuable metal in a retired crystalline silicon cell photovoltaic welding strip. The method comprises the following steps: disassembling a photovoltaic solder strip from a retired crystalline silicon cell, and removing impurities from the photovoltaic solder strip to obtain a clean solder strip; adding the clean welding strip into an acetic acid solution, heating and stirring to fully react, and filtering to respectively obtain filter residues, copper strips and lead-containing filtrate; adding a precipitant into the lead-containing filtrate to carry out precipitation reaction, and after the reaction is finished, carrying out solid-liquid separation, washing and drying to obtain a lead sulfate product; washing and drying filter residues to obtain a tin dioxide crude product; and washing the copper bar with absolute ethyl alcohol, and drying to obtain the metal copper bar with the purity not lower than 99.0%. The method has the advantages of high metal separation efficiency, high recovery rate, low energy consumption, low acid and alkali consumption, difficulty in causing secondary environmental pollution and the like, and provides a feasible solution for selective separation and recovery of valuable metals of retired photovoltaic modules.

The invention discloses automatic cleaning equipment for an acid filling kettle of a storage battery, and aims to provide automatic cleaning equipment which can realize automatic cleaning of the acid filling kettle of the storage battery and is high in cleaning efficiency and low in labor cost; and sediments such as lead sulfate on the inner wall of the acid filling kettle of the storage battery can be effectively removed, so that the cleaning quality and effect are ensured. The device comprises an ultrasonic heating and soaking primary cleaning pool which is internally provided with a heater for heating water in the ultrasonic heating and soaking primary cleaning pool; an ultrasonic secondary cleaning pool; the suspension type conveying line comprises a plurality of hanging pieces running along a preset track, and removable acid injection pot placing frames are hung on the hanging pieces; and in the process that the acid injection pot placing frame and the hanging pieces run along the preset track, the acid injection pot placing frame sequentially passes through the ultrasonic heating and soaking primary cleaning pool and the ultrasonic secondary cleaning pool.

The invention discloses a lead-lithium battery negative electrode material composite formula and a processing technology, and belongs to the technical field of lead-lithium batteries, the lead-lithium battery negative electrode material composite formula comprises the following components by weight: 80-90 parts of a high-entropy lead powder composite material, 2-5 parts of a novel composite expanding agent, 1-3 parts of a conductive reinforcing agent, 5-8 parts of a lithium sulfate-MOF electrolyte with a concentration of 0.5-1.5 mol / L, and 3-6 parts of a binder, the negative electrode material has the advantages of being capable of effectively dispersing the additive and avoiding overgrowth of lead sulfate crystals, and the problems that an existing negative electrode material composite formula of the lead-lithium battery cannot avoid overgrowth of the lead sulfate crystals and an existing processing technology cannot ensure uniform dispersion of the additive, and then the discharge performance and the overall service life of the lead-lithium battery are affected are solved.

The invention discloses a high-temperature-resistant maintenance-free lead-acid storage battery for starting. The lead-acid storage battery comprises a positive plate, a negative plate, a partition plate, electrolyte and a storage battery tank, the positive plate comprises a positive grid filled with positive lead plaster; the negative plate comprises a negative plate grid filled with negative lead plaster; the negative electrode lead paste is prepared by curing lead powder, a condensation polymer of beta-naphthol sulfonic acid and formaldehyde, lignin, barium sulfate, acetylene black, short fibers, a sulfuric acid aqueous solution and deionized water according to a ratio. The condensation polymer of beta-naphthol sulfonic acid and formaldehyde added in the negative electrode lead paste has low solubility in an electrolyte and strong oxidation resistance, reduces the volume of lead sulfate crystals generated by discharge, increases the porosity of a negative electrode active substance, inhibits the formation of large-particle metal lead in the charging process, delays the shrinkage of the negative electrode active substance, and improves the charging efficiency. Meanwhile, the hydrogen evolution overpotential is improved, and the water loss of the storage battery is inhibited.

To provide a lead sulphate coating removal device which is low in power consumption and which gives no damage to an electrode of a lead storage battery.SOLUTION: A lead sulfate coating removal device which removes a lead sulfate coating generated on an electrode of the lead storage battery and which comprises: a generation unit which generates, on the basis of a signal extracted from the lead storage battery, a removal signal for the lead sulfate coating having a peak value of 550-750 mA, a pulse width of 5-100 nsec, and a frequency of 5-50 kHz; and a supply unit which supplies the removal signal generated by the generation unit to the electrode of the lead storage battery.SELECTED DRAWING: Figure 1

To provide a technology for regenerating a lead-acid battery while being still in operation.SOLUTION: Electromagnetic waves having a frequency set to provide energy that dissociates lead sulfate molecules into lead cations and sulfate anions are emitted from outside the lead-acid battery so as to reach the electrodes of the lead-acid battery.SELECTED DRAWING: Figure 1

The invention discloses a method for detecting lead plaster components of a waste lead-acid storage battery. The invention relates to the technical field of waste storage battery resourceful treatment and detection, the method comprises preparation and calibration of an EDTA standard solution, and continuous determination of the content of lead oxide, lead sulfate, metal lead and lead dioxide in lead plaster, through use of formic acid, ammonium carbonate and other reagents and combination of an ultrasonic-assisted extraction technology, the dissolution efficiency is significantly improved, and the content of lead oxide, lead sulfate, metal lead and lead dioxide in the lead plaster is determined. The reaction time is greatly shortened; the selective dissolution of the metal lead is realized by accurately controlling the low-temperature condition and the reaction time, and the interference of lead dioxide is effectively avoided; according to the method, by optimizing a reagent system and introducing ultrasonic-assisted extraction, the dosage of strong acid and the emission of toxic wastes are greatly reduced, the method is more environment-friendly while the result accuracy is ensured, and the method is clear in operation flow, good in reproducibility and suitable for rapid and reliable determination of the components of the lead paste in an industrial recovery scene.

The invention discloses a preparation method of tetrabasic lead sulfate for a lead storage battery, and relates to the field of lead storage batteries. The preparation method comprises the following steps: carrying out wet grinding on completely dried lead oxide and a sulfur source under lubrication of an organic solvent, carrying out thermal stirring with more organic solvents to trim a crystal form, standing, cooling, filtering, washing and drying to obtain the tetrabasic lead sulfate for the lead storage battery. In some embodiments, ethylene glycol or a compound of ethylene glycol and polyethylene glycol is adopted as a solvent, compared with dry grinding, the efficiency and uniformity are greatly improved, the problems that byproducts are easily generated and crystal grains are easily coarse in water grinding are avoided, meanwhile, rapid crystal form finishing can be carried out at a higher temperature, and the product quality is improved. And rod-like tetrabasic lead sulfate with small particle size is obtained while the overall production energy consumption is reduced.

The invention relates to a polar plate, a preparation method of a three-dimensional conductive grid layer structure, a battery and an energy storage device. The pole plate comprises a substrate and an active substance layer covering the substrate, the active substance layer is constructed to be of a three-dimensional conductive grid layer structure, and the three-dimensional conductive grid layer structure forms the outer side face of the active substance layer. The framework is provided with a three-dimensional conductive grid, and the three-dimensional conductive grid is filled with the active substance. According to the polar plate, a compact lead sulfate barrier layer can be prevented from being generated on the surface, the overall structural strength is high, and the problems of capacity reduction and early failure caused by cracking and falling of active substances of the battery can be avoided.

The invention provides a negative electrode lead paste additive, a negative electrode lead paste and a preparation method and application of the negative electrode lead paste. The negative electrode lead paste additive comprises barium sulfate and treated lead sulfate, and the treated lead sulfate is prepared by the following steps: (1) thoroughly discharging a waste battery to convert a negative electrode active substance into lead sulfate; (2) taking out the negative plate, and washing off the sulfuric acid electrolyte attached to the negative plate; and (3) separating active substances in the cleaned negative plate, drying, crushing, grinding and screening to obtain the treated lead sulfate. The treated lead sulfate added in the invention directly becomes a negative electrode chemical reaction product lead sulfate nucleation center when the negative electrode discharges, and the performance of the treated lead sulfate is superior to that of pure barium sulfate as the negative electrode nucleation center. The prepared treated lead sulfate enables the battery to be difficult to be reduced into spongy lead during charging, and the effectiveness of double nucleation centers (lead sulfate and barium sulfate) is kept.

The invention discloses a waste lead-acid storage battery dilute acid resourceful treatment process based on nanofiltration-electrodialysis synergetic waste heat evaporation, and belongs to the field of hazardous waste treatment. According to the process, impurities are removed through three-stage precision filtration (50 microns, 10 microns and 1 micron) and ultrafiltration (PVDF membrane) for the waste acid with the sulfuric acid concentration of 1.4%-2.3%, lead and cadmium ions are separated through an acid-resistant nanofiltration membrane (the molecular weight cutoff is 200-500 Da) (the rejection rate is larger than or equal to 95%), and low-heavy-metal acid liquor is obtained; and concentrating to 5-8% by electrodialysis, and purifying until the content of sulfuric acid is greater than or equal to 15% and the content of lead residue is less than or equal to 3.0 mg / L in combination with single-effect waste heat evaporation (60-80 DEG C), and directly recycling for electrolyte compounding. After the nanofiltration concentrated water and the electrodialysis waste liquid are neutralized and precipitated, the lead content of the sludge is greater than or equal to 5% (HW31 hazardous waste), and the lead curing rate is greater than or equal to 99.5%. Through a membrane separation and waste heat utilization synergistic technology, the recovery rate of sulfuric acid is greater than or equal to 85%, the sludge is reduced by 90%, the energy consumption is reduced by 50%, the problems of low recovery rate, high energy consumption and secondary pollution in low-concentration waste acid resourceful treatment are solved, and high efficiency and environmental friendliness are achieved.

The invention discloses a method for detecting the carbon content in a battery negative plate. The method comprises the following steps: S1, preparing raw materials: preparing a negative plate sample, a nitric acid solution and ammonium acetate; s2, removing lead from the raw material: putting the negative plate sample into an excessive nitric acid solution, and heating the mixture to dissolve lead in the negative plate sample; s3, removing lead sulfate from the raw materials. Lead in the negative plate sample can be effectively dissolved by reacting the negative plate sample with nitric acid, and lead sulfate generated by contact of the negative plate and sulfuric acid can be dissolved by adding ammonium acetate, so that the lead sulfate is prevented from being mixed in carbon to influence a detection result, and the detection accuracy is improved; the reaction solution is heated and stirred, so that the reaction can be fully carried out, residues of lead and lead sulfate are prevented, the filter paper and the carbon are dried, water residues on the surfaces or in the filter paper and the carbon can be prevented, and the detection accuracy is further improved.

The invention belongs to the technical field of preparation of lead-acid storage batteries, and particularly discloses a lead-acid storage battery which comprises a positive plate and a negative plate, the positive plate comprises a positive plate grid and positive lead paste, and the negative plate comprises a negative plate grid and negative lead paste; a formula of the positive lead paste comprises the following components in parts by weight: 90-150 parts of lead powder, 1-10 parts of red lead, 5-15 parts of lead sulfate, 1-3 parts of graphene, 0.5-0.3 part of short fibers, 8-20 parts of a sulfuric acid solution and 10-15 parts of water; a formula of the negative electrode lead paste comprises the following components in parts by weight: 90-150 parts of lead powder, 0.5-1 part of carbon nanotubes, 1-3 parts of barium sulfate, 1-3 parts of lignin, 8-15 parts of a sulfuric acid solution, 10-15 parts of water and 1-3 parts of titanium nitride. The invention also discloses a preparation method of the positive plate and a preparation method of the negative plate. According to the invention, early capacity attenuation of the storage battery can be prevented, and the overall service life of the storage battery is prolonged.

The application relates to the technical field of lead-acid storage batteries, and discloses a preparation method of a graphene lead sulfate composite material; the method comprises the following steps: mixing and stirring graphite, concentrated sulfuric acid and sodium nitrate at low temperature, adding potassium permanganate in the stirring process to obtain a low-temperature reaction product; increasing the low-temperature reaction product to medium temperature and reacting for a period of time to obtain a medium-temperature reaction product; adding distilled water and hydrogen peroxide to the medium-temperature reaction product after temperature reduction, washing the reaction product with a hydrochloric acid solution and distilled water after the reaction is completed, drying the reaction product to obtain solid material; mixing the solid material with lead sulfate trihydrate, performing ultrasonic treatment, and then performing immersion; performing extraction and filtration on the precipitated product after the immersion, and performing drying to obtain the graphene lead sulfate composite material. The graphene lead sulfate composite material is prepared by oxidizing and compounding the graphite, so that the conductivity of the material is improved; the graphene lead sulfate composite material can be subjected to graphite interlayer peeling during the manufacturing process, the specific surface area is increased, the conductivity of the battery is improved, and the conduction process is accelerated.

The present invention belongs to the technical field of lead-acid batteries, and specifically relates to a method for determining the content of basic lead carbonate, tribasic lead sulfate, and tetrabasic lead sulfate in lead paste for positive electrodes of lead-acid batteries. The present invention solves the problem in the prior art that conventional heating methods cannot accurately determine whether moisture has been completely removed, resulting in incomplete moisture removal during heating or the weighed object reabsorbing some moisture from the air during the weighing process, leading to distorted measurement results. The present invention effectively differentiates and measures the contents of 3PbO·PbSO4·H2O and 2PbCO3·Pb(OH)2 by changing the weight of the lead paste at corresponding temperatures. The method can further determine the content of 4PbO·PbSO4 in combination with the test method for "GB T 23636-2017 Lead-acid Battery Plates," thereby obtaining the accurate contents of 3PbO·PbSO4·H2O, 4PbO·PbSO4, and 2PbCO3·Pb(OH)2.

A new type of energy storage battery employs a structure with opposite terminals and a busbar. This design fully addresses the issues of acid stratification and uneven utilization of active materials between the upper and lower sections caused by excessively high plate height, leading to reduced battery life. This results in a more uniform current distribution and significantly improved charge acceptance and deep cycle life. The positive plate grid alloy undergoes pretreatment with pure lead combined with electroplating, avoiding the difficulties in forming a pure lead corrosion layer and insufficient adhesion to lead paste, thus improving battery conductivity and deep cycle life. Pore-forming agents and conductive agents are introduced into the positive electrode formulation to balance capacity and lifespan. The negative electrode formulation uses dendritic lead sulfate, significantly increasing the pore size and total pore volume after formation. During charging and discharging, this enhances ion transport channels, improves the utilization rate of negative active materials and fast charging capability, and delays battery sulfation. Simultaneously, the high-carbon formulation improves charge acceptance, and the dendritic lead sulfate prevents overcharging during negative electrode formation. Compared to traditional lead-acid energy storage batteries, this design extends battery life by at least 50%.

The application relates to the technical field of battery repair, and discloses a method and system for expanding the plates of a fiber lead-acid gel battery and a storage medium, the method comprising: placing the battery in a conductive liquid in a liquid storage tank body, so that the battery top cover is immersed in the liquid; during repair, a first alternating current is applied to the two plates of the battery by a high-voltage generator; the repair process comprises high-temperature and vibration processes; when the high-temperature process is performed alone, the first current is adjusted in negative correlation with the real-time temperature; when the vibration process is performed alone, the first frequency is adjusted in negative correlation with the real-time vibration value; when the two processes are performed simultaneously, the first frequency adjustment step is controlled in positive correlation with the temperature rise speed, and the first current adjustment step is controlled in negative correlation with the vibration value change speed. The method can uniformly distribute the current, avoid secondary damage to the battery, efficiently remove lead sulfate crystals and repair the structure of active substances, restore the effective reaction area of the plates, narrow the gap between the actual capacity and the nominal capacity of the battery, and improve the performance stability and service life.

The invention discloses a high-rate lead-acid storage battery negative plate and a preparation method, and relates to the technical field of batteries, and negative electrode lead paste comprises lead powder, barium sulfate, sodium lignosulfonate, a polycarboxylate pyrrole coated carbon nanotube-PbO-PbS composite material and hydrophilic modified polyester high-strength fibers. The composite material takes a multi-walled carbon nanotube as a substrate, a lead-based MOF precursor is constructed through reaction, a nitrogen-sulfur co-doped carbon nanotube loaded porous PbO-PbS heterojunction is obtained through high-temperature pyrolysis, and a polycarboxylate pyrrole layer is coated through in-situ chemical oxidation polymerization. The hydrophilic modified polyester fiber is obtained through graft modification of polyethylene glycol diglycidyl ether. The lead sulfate is induced to be uniformly deposited through the lattice matching effect of PbS, the carbon nanotubes construct a three-dimensional conductive network, the polycarboxylate pyrrole layer enhances the interface affinity, and the modified fibers guarantee the structural integrity of the electrode plate, so that the cycle life and the stability of the negative electrode plate in a high-rate partial charge state are remarkably improved.

The application provides a variable-frequency resonance type lead-acid storage battery repair instrument, which comprises a control circuit and a power circuit; the control circuit is used for controlling the conduction or disconnection of each switch component of the power circuit according to a received repair signal, a charging signal or a discharging signal; the power circuit is used for inputting current oscillation waveforms with various frequencies to the lead-acid storage battery, making the lead-acid storage battery sulfuric acid lead crystal crack through resonance of the current oscillation waveforms and the sulfuric acid lead crystal, and realizing repair of the lead-acid storage battery, and is also used for charging or discharging the lead-acid storage battery according to the conduction or disconnection of each switch component. The lead-acid storage battery repair instrument of the application repairs the lead-acid storage battery through resonance of a variable-frequency resonance current waveform and a sulfuric acid lead crystal, has a simple circuit structure, good repair effect, and can realize charging and discharging test functions, detect the capacity of the battery, and test the repair effect without additional equipment, and is low in cost.

The application discloses a lead-sodium storage battery positive pole lead paste in the technical field of storage batteries, which comprises the following components by weight: lead oxide powder 100 parts, sulfuric acid 6-10 parts, deionized water 14-24 parts, short fibers 0.05-0.07 parts, lead dioxide 2-8 parts, lead sulfate 1-2 parts, calcium sulfate 0.5-1.5 parts, stannous sulfate 0.05-0.15 parts, antimony trioxide 0.05-0.15 parts, carbon black 0.5-1 part, sodium hydroxymethyl cellulose 0.1-0.2 parts and mixed carbon material 0.1-0.5 parts. Through the design improvement of the process, the application can effectively improve the formation efficiency, low-temperature performance and service life of the storage battery.

This invention discloses a method for preparing lead halide semiconductor thin films from waste lead paste. The method includes the following steps: A: Thoroughly cleaning the substrate, followed by drying; B: Collecting a portion of lead paste from waste lead-acid batteries, first using a desulfurizing agent to desulfurize the lead paste with lead sulfate, then adding a reducing agent to convert lead dioxide into lead oxide, and then using an organic acid leaching agent to obtain an acid solution containing divalent lead ions; C: Depositing the acid solution containing divalent lead ions and a certain amount of halogenated acid or halide salt onto the treated substrate, then placing the substrate on a hot plate for high-temperature annealing, obtaining the lead halide semiconductor thin film after annealing, and then drying it in a drying oven. This method not only simplifies the steps and directly yields lead halide thin films, reducing excessive waste of lead resources, but also promotes the large-scale application of optoelectronic devices with the obtained lead halide thin films.

The invention discloses a preparation method of a tetrabasic lead sulfate high-purity seed crystal, and relates to the field of lead-acid batteries. According to the preparation method, a strong, medium and weak three-stage complexing system is adopted to assist lead oxide and sulfuric acid in synthesis of tetrabasic lead sulfate, compared with a traditional two-stage or single-stage complexing agent, uniform release of lead ions can be better controlled, agglomeration of reaction intermediate compounds is reduced due to existence of cyclodextrin, and the length-diameter ratio of the product is further increased due to polycarboxylic acid. The tetrabasic lead sulfate seed crystal obtained by the preparation method disclosed by the invention has the advantages of relatively low particle size, relatively good morphology, relatively high purity and the like, and has great benefits when being used as a positive electrode additive of a lead-acid battery.

The application discloses to the technical field of lead-acid storage batteries, and particularly relates to a lead-acid storage battery recovery method, which comprises the following specific steps: S1, battery detection: firstly, appearance inspection is performed on the lead-acid storage battery to check whether defects exist, then a battery detector is used to detect the parameters of the battery, and the damage degree and main problems of the battery are determined; S2, electrolyte extraction and cleaning: all electrolyte in the battery is extracted, then distilled water is added into the battery to soak the plates, after soaking, the distilled water is extracted, and the cleaning process is repeated. The application can avoid secondary damage of the plates caused by large current, accurately solve the problem of capacity reduction caused by plate vulcanization, and has more remarkable recovery effect compared with the case that lead sulfate crystals cannot be decomposed in conventional charging.

The invention relates to the technical field of lead-acid storage batteries, and particularly discloses a formula of a long-service-life lead-carbon battery negative electrode lead paste containing anisotropic graphite. The preparation method comprises the following steps: firstly, preparing thin-layer graphite by combining an oxidation-reduction method with an ultrasonic stripping process, doping anisotropic graphite (1-3% in mass ratio) into negative electrode lead paste, and compounding barium sulfate, carbon black and sodium lignin sulfonate to form a multi-stage conductive network to inhibit coarsening of lead sulfate crystal grains; and secondly, the grid structure is innovated, and the structure of a punching net grid and a special-shaped graphite coating is adopted, so that the corrosion resistance can be effectively improved. Compared with a traditional storage battery not doped with anisotropic graphite, the storage battery has the advantages that the cycle life is prolonged to be larger than or equal to 800 times, the capacity retention rate after 800 times of circulation is larger than or equal to 86.3%, the capacity retention rate at the low temperature of-18 DEG C is larger than or equal to 80%, the corrosion resistance of the plate grid is improved by 50% or above, the internal resistance is reduced by 10-15%, and the technical problems that a traditional lead-acid storage battery is short in cycle life and rapid in capacity fading, and the plate grid is prone to corrosion failure are solved.

The present invention discloses a process for treating electrolytes from waste flooded lead-acid batteries, which relates to the technical field of lead-acid batteries and comprises the following steps: S1, utilizing lead oxide-containing waste generated during the processing of lead-acid batteries to react with electrolytes from waste flooded lead-acid batteries; simultaneously, utilizing the positive and negative active materials of waste lean lead-acid batteries to react with the electrolytes from waste flooded lead-acid batteries in a stainless steel container via a stainless steel stirring paddle, and obtaining crude lead sulfate and a filtrate containing sulfuric acid after filter pressing; S2, converting the crude lead sulfate into lead and analytically pure sulfuric acid, and simultaneously neutralizing the filtrate with slaked lime to obtain calcium sulfate. The present invention greatly improves the resource utilization of waste electrolytes, effectively avoids the occurrence of adverse side reactions, makes the operation simpler and more convenient, greatly simplifies the treatment process, improves treatment efficiency, and significantly reduces investment costs.

The invention relates to the technical field of pole plate detection, and discloses a method for detecting the content of lead oxide, lead sulfate and free lead in a lead-acid storage battery pole plate, which comprises the following steps: preparing a pole plate into a to-be-detected sample, mixing the to-be-detected sample with an acetic acid ethanol solution, heating to boil, and filtering to obtain a filtrate; filtering after cooling, and washing filter residues by using an acetic acid ethanol solution to obtain primary filter residues and lead oxide filtrate; mixing the primary filter residue with a nitric acid solution and water, and heating until boiling; cooling, filtering, and washing the filter residue with pure water to prepare a secondary filter residue and a free lead filtrate; mixing the secondary filter residue with a sodium chloride solution, standing overnight, filtering, washing the filter residue with glacial acetic acid during filtering, washing the filter residue with the sodium chloride solution, and collecting the filtrate to obtain a lead sulfate filtrate; respectively titrating the lead oxide filtrate, the free lead filtrate and the lead sulfate filtrate by using EDTA (Ethylene Diamine Tetraacetic Acid); according to the method, the contents of lead oxide, lead sulfate and free lead of the polar plate can be tested by using one polar plate sample, and the test data accuracy is high.

The invention discloses a preparation method of an AGM all-solid-state colloidal electrolyte, and belongs to the technical field of electrolyte preparation. After surface functional group modification and modification treatment are carried out on carbon nanotubes, the carbon nanotubes can be better dispersed in the electrolyte, a conductive network is constructed, the conductivity of the electrolyte is improved, and then the charge-discharge performance of a battery is improved; meanwhile, lithium nitrate and VC are added into the electrolyte, the lithium nitrate enables lead dendritic crystal growth to be more uniform and ordered in the battery charging process, the risk of dendritic crystal short circuit is reduced, meanwhile, the structure and performance of the electrode are optimized, and VC can restrain lead sulfate side reaction. In the charging and discharging process of the battery, adverse generation of lead sulfate is reduced, electrode passivation is avoided, the activity of the electrode is kept, and the cycle life of the battery is prolonged.

The present invention relates to the field of battery manufacturing technology and specifically discloses a curing process for battery plates. The specific steps include: using humidity above 95% and a temperature of 42-50°C to reduce the free lead content of the lead paste to below 14%, thereby promoting the conversion of lead oxide into a tribasic lead sulfate crystalline phase; raising the curing temperature to 65°C and maintaining a humidity of 95% to promote the formation of a tetrabasic lead sulfate crystalline phase; employing a ventilation control strategy to accelerate water evaporation and reduce drying time; and employing a temperature-controlled drying technique to reduce the moisture content to below 0.1%. The present invention shortens the curing time of lead-acid battery plates and enhances the mechanical strength and cycle life of the plates.