30 results about "Lead sulfate" patented technology

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

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 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 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.

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 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 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 invention discloses a method for extracting lead from waste lead plaster by taking sulfide minerals as a reducing agent, and belongs to the field of hydrometallurgy. The method comprises the following steps: mixing, heating and stirring the waste lead plaster, sulfide minerals, ferric salt and a sulfuric acid solution, reducing and converting a lead-containing phase in the waste lead plaster into insoluble lead sulfate to obtain reducing slag, generating ferrous ions from the sulfide minerals under the action of a ferric salt catalyst, and reducing and converting lead dioxide in the waste lead plaster into lead sulfate; the reducing slag and an acetate solution are mixed, heated and stirred, lead sulfate is desulfurized and leached into soluble lead acetate, and a lead-containing leaching solution is obtained. Aiming at the waste lead plaster in the waste lead-acid storage battery, the low-cost sulfide mineral is used as a reducing agent, so that the process cost is reduced. By means of the two-step process of reduction conversion and desulfurization leaching, the additional impurity separation procedure is avoided, the extraction efficiency of lead in the waste lead plaster is 99% or above, the pure lead-containing leaching solution is obtained, and a new thought is provided for efficient recycling of the waste lead plaster.

The utility model discloses a tribasic lead sulfate purification device with a good adsorption effect, and particularly relates to the technical field of purification devices, lubricating oil in oil liquid chambers on two sides of a positioning seat not only ensures the smoothness of subsequent rotation of a rotating seat, but also greatly improves the sealing property of a joint, and purification liquid smoothly enters a moving cylinder through a liquid inlet pipe, so that the purification effect is improved. The movable barrel is communicated with the liquid inlet pipe through the communicating window, a certain angle is given to the movable barrel and the rotating seat by the telescopic spring in the mounting cavity, and when purification liquid is sprayed out from the multiple spraying heads, located at one end of the rotating seat, of the movable barrel, the spraying direction and the horizontal plane of the rotating seat form an angle of 45 degrees, and counter-acting force generated by spraying pushes the multiple spraying heads to rotate; and along with the increase of the pressure of the purification liquid, the elastic force of the telescopic spring can be overcome, the spraying angle is increased accordingly, compared with an existing fixed common spraying head, the angle of the spraying head can be automatically adjusted according to the pressure of the purification liquid, and the working stability and reliability of the whole purification device can be improved.

The invention discloses a lead-acid battery wastewater treatment method. The method comprises the steps of separate collection and homogeneous adjustment, introducing the homogenized wastewater into a crystallization reactor, adding lead sulfate seed crystals or heterogeneous nucleation carrier seed crystals, and selectively separating out lead in the form of lead sulfate coarse particle crystals by adopting segmented pH regulation and low supersaturation closed-loop control; carrying out solid-liquid separation on crystallization effluent, and recovering a coarse particle solid phase as a seed crystal cycle; the supernate is subjected to secondary weak base precipitation and then enters an electric flocculation unit to deeply remove residual colloidal / complex lead; then carrying out flocculent precipitation and filtration, and arranging an ion exchange / adsorption or membrane separation polishing unit according to standard reaching or reuse requirements; and dehydrating the generated solid phase or sludge and recovering the seed crystal. Through seed crystal induced crystallization and seed crystal circulation, generation of fine grains is reduced, solid-liquid separation and sludge dewatering properties are improved, the lead removal stability is improved, and the operation cost is reduced.

The invention provides a secondary acid adding method for a lead storage battery, which comprises the following steps of: (1) adding acid for the first time, adding electrolyte at the temperature of 5-10 DEG C, and adding the electrolyte in an amount which is 60-80 percent of the total acid adding amount; and (2) adding acid for the second time, namely adding the electrolyte at the temperature of-10 to-8 DEG C, and enabling the adding amount to be equal to the residual acid adding amount, so that the sum of the acid adding amounts of the two times of acid adding is equal to 100% of the total acid adding amount. According to the invention, the problems of acid shortage of a single cell, poor consistency of acid amount and burning loss of a polar plate caused by incomplete pickling of polar plate lead plaster when gas leakage occurs during first-time acid addition and the negative pressure of acid addition cannot meet the requirement are solved; the problems that the internal temperature difference of the single-cell pole group is large, the thickness of a lead sulfate layer is not uniform, and the consistency of active substance components of the pole plate of the single-cell pole group is poor after formation is finished are solved; and the investment cost of acid liquor cooling equipment can be reduced.

The application discloses a composite carbon material and application thereof. The battery sulfation problem and the problem of low hydrogen evolution overpotential of carbon material are solved by preparing the carbon composite material, the carbon composite material containing a mercapto group, an ether bond and a carboxyl group is prepared by blending and sintering of a mercapotolylene glycol carboxylic acid and a soluble lead salt, the C-O bond formed by the two ends of the ether bond and the O-Pb bond formed by the lead element and the carbon element are used as the crystal sites of lead atoms, the ether bond and the mercapto group can produce a synergistic effect, the combination energy of lead ions and sulfate radicals can be improved, the lead sulfate crystallization process can be effectively improved, the lead sulfate grains are refined, and the cycle life of the battery is prolonged. In addition, a large number of C-O-Pb bonds and mercapto groups can effectively occupy the hydrogen evolution active sites of the carbon material, the hydrogen evolution overpotential of the carbon material is improved, the hydrogen evolution amount in the use process of the lead-carbon battery is reduced, the consumption of the battery electrolyte is reduced, and the cycle life of the lead-carbon battery is further improved.

The invention discloses an emergency starting power supply and a pulse charging repair method thereof. The emergency starting power supply comprises a built-in power supply module, an output interface unit, a power output unit, a power supply management module, a voltage detection unit, a current detection unit and a microcontroller unit. The microcontroller unit calculates the dynamic equivalent internal resistance of the to-be-repaired battery according to voltage and current parameters collected during pulse injection, and monitors the change trend of the to-be-repaired battery in multiple repair unit cycles in real time. And if the decline slope of the dynamic equivalent internal resistance is judged to be lower than a preset threshold value, dynamically adjusting the execution duration of pulse current with different amplitudes in a follow-up repair unit cycle. According to the method, through closed-loop feedback of the internal resistance decreasing trend, self-adaptive matching of the repairing strategy and the real-time state of the battery is achieved, the elimination efficiency of lead sulfate crystals is remarkably improved, the repairing period is shortened, the excessive repairing risk is avoided while the battery capacity is effectively recovered, and the method has the extremely high intelligent level and safety.

The invention relates to a method for improving initial capacity and cycling stability of a positive electrode of a lead-carbon battery, and belongs to the technical field of lead-carbon batteries. The lead-carbon battery positive electrode additive with the proton buffering function is adopted, and the additive is prepared from, by mass, 80%-90% of lead powder, 0.1%-1.0% of nucleating agent, 0.1%-0.5% of short fiber, 0.2%-0.6% of conductive agent, 0.3%-0.8% of conductive polymer, 0.5%-2.0% of poising agent, 4.0%-8.0% of sulfuric acid and 8.0%-12.0% of deionized water. The nucleating agent is one or more of SnSO4, tetrabasic lead sulfate and CaSO4; the poising agent is hierarchical pore channel SiO2 modified by a proton carrier, and the proton carrier is-OH,-COOH,-NH2 or-H2PO4. The lead-carbon battery positive electrode additive promotes the substance conversion efficiency and crystal nucleus growth in curing and formation, and the charging acceptance of the lead-carbon battery is remarkably improved; the lead paste is subjected to dual effects of the poising agent in the formation process, so that the conversion efficiency of positive active substances in the formation period is improved, and the initial capacity and service life of the battery positive electrode are improved.

The application discloses a preparation method of a composite carbon material, the composite carbon material prepared by the method and application of the composite carbon material. A mixed binder containing an organic binder, a metal element, an additive and a solvent is mixed with an activated carbon material, and then dried to obtain the composite carbon material. According to the principle of similarity and compatibility, the organic ligand can form a sufficient mixture with the binder, and the pi bond can make the metal element sufficiently combined with the binder, thereby improving the adhesion. The presence of the binder can make a modified carbon material containing a hydrophobic layer. The hydrophobic layer can help to hinder the contact between active sites of the carbon material and hydrogen ions, thereby improving the hydrogen evolution overpotential of the carbon material. In addition, the metal element can form crystallization sites of metal lead, the charging and discharging process of a lead-acid battery is a conversion process between the metal lead and lead sulfate, more crystallization sites of the metal lead can refine the grain size of the charged product metal lead, and can indirectly refine the grain size of the discharged product lead sulfate, thereby prolonging the cycle life of the lead-carbon battery.

This invention provides a lead-acid battery regeneration device that enables the reuse of lead-acid batteries in a short time. The device (100) regenerates the lead-acid battery (18) by electrochemically decomposing and reducing the lead sulfate crystallized insulating material. It comprises: a storage circuit (17) with a capacitor to which charge is stored; a discharge switch circuit (19) that controls the on / off state of the storage circuit (17) to apply a pulse voltage to the lead-acid battery (18); and a series resonant circuit (30) configured by connecting the storage circuit (17), the lead-acid battery (18), and the discharge switch circuit (19) in series. By applying a pulse voltage of a predetermined frequency once to the lead-acid battery (18), N-th harmonic resonance phenomena (where N is an integer greater than or equal to 1) are generated within the lead-acid battery (18). The lead-acid battery (18) is regenerated by repeatedly applying this pulse voltage multiple times.

The invention relates to an active substance modification method, a bipolar plate, a lead-based battery and an energy storage device. The active substance modification method comprises the following steps: mixing a raw material to be modified with modified graphite powder to form a mixture, and adding a plurality of impact balls; a high-speed stirring device is used for stirring the mixture, and under the high-energy impact of the impact balls, particles of the lead sulfate generate cracks and molecular lattices generate lattice distortion, so that fine particles of the graphene can enter the particle cracks and the molecular lattices of the lead sulfate. As fine particles of graphene exist in particle cracks and molecular lattices of the modified lead sulfate, the modified lead sulfate has good conductivity and continuously keeps good conductivity during charging and discharging, good conductivity and excellent activity can be ensured even if the proportion of the lead sulfate in a positive active material or the positive active material is 100%, and the positive active material can be applied to the field of lithium ion batteries. The specific capacity and the specific power of the lead-based battery are greatly improved, irreversible sulfation of a polar plate is prevented, and the service life is prolonged.

The invention provides lead-acid storage battery repair liquid as well as a preparation method and application thereof. The lead-acid storage battery repair liquid comprises water and the following preparation raw materials in percentage by mass: 0.2%-2% of polyvinylpyrrolidone, 0.3%-3% of nano cellulose, 0.5%-5% of cobaltous sulfate, 0.3%-3% of nano metal oxide, 0.3%-3% of mannitol, 0.3%-3% of amino acid, 0.5%-5% of etidronic acid, 0.5%-3% of quaternary ammonium salt, 0.3%-3% of an anionic surfactant and 0.05%-1% of carbon nanotubes. The nano metal oxide is compounded by bismuth oxide, cobalt oxide and manganese oxide according to the mass ratio of 1: (0.5-1.5): (1-3). The lead-acid storage battery repairing liquid can efficiently remove lead sulfate deposition on a polar plate, and the battery capacity recovery rate is remarkably improved. The invention also provides a preparation method and application of the lead-acid storage battery repair liquid.

The invention belongs to the technical field of lead-acid battery production, and discloses a positive electrode lead paste and a preparation method thereof, and a storage battery, the positive electrode lead paste at least comprises, by mass, 80-90% of lead powder, 5-10% of sulfuric acid, 3-9% of pure water, 0.2-1% of tetrabasic lead sulfate, 0.1-0.5% of polyaniline, and 0.3-0.8% of polytetrafluoroethylene. Furthermore, a certain supporting effect is provided for the cured lead paste, the structural strength of the lead paste is further improved, the compactness degree in the lead paste can be improved to a certain extent through filling of polyaniline, and then the compactness degree of an oxide layer between the lead paste and the grid is synchronously improved, so that the binding force between the lead paste and the grid is improved, and the service life of the lead paste is prolonged. The lead paste is prevented from falling off.

The application provides a lead-acid battery repair liquid and a preparation method and application thereof. The lead-acid battery repair liquid comprises water and the following preparation raw materials in percentage by mass: 0.2%-2% of polyvinylpyrrolidone, 0.3%-3% of nanocellulose, 0.5%-5% of cobalt sulfate, 0.3%-3% of nanometal oxide, 0.3%-3% of mannitol, 0.3%-3% of amino acid, 0.5%-5% of hydroxyethylenediphosphonic acid, 0.5%-3% of quaternary ammonium salt, 0.3%-3% of anionic surfactant and 0.05%-1% of carbon nanotube; the nanometal oxide is compounded by bismuth oxide, cobalt oxide and manganese oxide at a mass ratio of 1:0.5-1.5:1-3. The lead-acid battery repair liquid can efficiently remove lead sulfate deposits on the plate and significantly improve the battery capacity recovery rate. The application further provides a preparation method and application of the lead-acid battery repair liquid.